Harvard University Department of Physics #division #answers


#physics answers

#

UPCOMING EVENTS

  1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
    Start: 04:15pm – End: 05:15pm
    • 04:15pm

“A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

  1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
    Start: 03:00pm – End: 04:30pm
    • 03:00pm

Title: “Current aspects of topological superconductivity”

Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

[1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
[2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
[3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
[4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
[5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

Thursday, October 27th

  1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
    Start: 12:00pm – End: 01:00pm
    • 12:00pm

Title: Soliton motion, dissipation, and death in quantum superfluids

Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

Relativistic electron scattering and QED

Abstract:
The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #math #problem #answers


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Virginia Board of Physical Therapy #dhp, #state #of #virginia #department #of #health #professions, #board #of #physical #therapy, #laws, #regulations, #guidance #documents, #board #members


    #

    Opioid Addiction Crisis Declared a Public Health Emergency in Virginia

    On November 21, 2016 Governor McAuliffe issued a News Release stating that State Health Commissioner Marissa Levine has declared Virginia s opioid abuse crisis a Public Health Emergency in the Commonwealth.

    2017 Spring Break Zika Awareness Toolkit

    Primarily a mosquito borne disease, the Zika virus is most impactful in warmer seasons when illness can be transmitted by insects carrying the virus from one person to another. Maintaining a keen awareness for the transmission and treatment of Zika virus infection is an imperative for healthcare practitioners.

    Along with their Zika Virus information page. the Virginia Department of Health (VDH) now offers a Spring Break Toolkit featuring printable infographics and online resources to help Virginians spread Zika awareness on social media.

    This information has been added to assist the public in understanding Physical Therapy practice and selecting a Physical Therapist or a Physical Therapist Assistant.

    Important Licensure Renewal Information

    Please click here to read important information regarding your 2016 renewal.

    Licensure Verification and Change of Name/Address Information

    Please click here for information on how to request a verification of licensure.

    Please click here for information on how to change your address or make a name change.

    Online Licensing – Physical Therapy licensees can renew a license, change an address and request a duplicate license online.

    2016 NPTE Examination Dates and Deadlines for PT and PTA s

    Please click here to view the 2016 NPTE dates and deadlines for applying.

    Use aPTitude for Tracking your CEU’s

    Continuing Education Courses

    To review Type 1 and Type 2 continuing education requirements for renewal and reinstatement of a Physical Therapist or a Physical Therapist Assistant license please click here for more information.

    Exemption of Continuing Competency Requirements

    The Virginia Board of Physical Therapy in accordance with Section 18VAC112-20-131(C) of the Regulations, entitled Continued Competency Requirements for Renewal of an Active License , exempts a licensee from the continuing competency requirements for the first biennial renewal following the date of initial licensure by examination in Virginia. This exemption does not include those who were licensed by endorsement.

    Extension of renewal requirements for deployed military and spouses
    Virginia law allows active duty service people or their spouses who are deployed outside the U.S. to have an extension of time for any requirement or fee pertaining to renewal until 60 days after the person s return from deployment. The extension cannot last beyond 5 years past the expiration date for the license. For more information, please read attached policy and contact the applicable board for your license.

    Discipline Case Information:

    The Board of Physical Therapy would like to share with you the top three types of cases that came before the board during FY15 (July 1, 2014 June 30, 2015) and that resulted in disciplinary action:

    • Fraudulent billing cases
    • Cases that resulted from out of state disciplinary orders
    • Continuing Education violations

    Healthcare Workforce Data Findings

    Duty to Report Adult Abuse, Neglect or Exploitation – More information.
    The Adult Protective Services Program at the Virginia Department of Social Services is pleased to announce the availability of a new online educational opportunity for mandated reporters of abuse, neglect and exploitation of older or incapacitated individuals. This online training course has been developed for, and with the assistance of, mandated reporters and APS professionals to assist mandated reporters in understanding adult abuse and their responsibilities as mandated reporters. Read More. (word .doc)

    Guidance Documents

    View and download the list of available guidance documents from the Board of Physical Therapy. These documents provide information or guidance to the public to interpret or implement statutes or the agency’s rules or regulations.

    Regulatory Town Hall

    The Virginia Department of Planning Budget has designed a Regulatory Town Hall for anyone interested in the proposal of regulations or meetings of regulatory boards. Please click here for more information on how to become a Registered Public User of the Regulatory Town Hall.



    Report Drug Trafficking in Georgia #drugs, #drug #trafficking, #georgia, #anti-drug, #carroll, #clayton, #cobb, #coweta, #dekalb, #douglas, #fayette, #fulton, #gwinnett, #harris, #heard, #henry, #meriwether, #muscogee, #newton, #pike, #rockdale, #spalding, #talbot, #taylor, #troup, #upson,georgia #bureau #of #investigation, #carroll #county #sheriff’s #office, #heard #county #sheriff’s #office, #meriwether #county #sheriff’s #office, #carrollton #city #police #department, #villa #rica #city #police #department, #atlanta #city #police #department.


    #

    WMR DEO

    Welcome

    The mission of the West Metro Regional Drug Enforcement Office is to aggressively seek out, dismantle, and prosecute drug trafficking organizations (DTO’s), drug traffickers and drug related violent criminals. The West Metro Regional Drug Enforcement Office (WMRDEO) is a Georgia Bureau of Investigation (GBI) Work Unit serving twenty-two Georgia Counties including Metro-Atlanta. The WMRDEO office is the first of its kind in Georgia. Formulated to maximize inter-agency cooperation.

    WMRDEO is a shared effort between the GBI and participating local law enforcement agencies. The GBI provides supervision, agents and logistical support to the work unit. Local participating agencies provide one or more officers whom are specially sworn GBI Task Force Agents. State and Local Agents work side by side to combat illicit drugs within the twenty-two County area of operation. The West Metro area of operation includes the counties of Carroll, Clayton, Cobb, Coweta, Dekalb, Douglas, Fayette, Fulton, Gwinnett, Harris, Heard, Henry, Muscogee, Newton, Pike, Rockdale, Spalding, Talbot, Taylor, Troup, and Upson.

    Currently Law Enforcement Agents are assigned from the Georgia Bureau of Investigation, Carroll County Sheriff’s Office, Heard County Sheriff’s Office, Fulton County Police Department, Carrollton City Police Department, Villa Rica City Police Department, and Atlanta Police Department. The West Metro Regional Drug Enforcement Office will accept application for agency membership from any governmental law enforcement agency serving within the WMRDEO area of operation.

    Participating Agencies

    Other Links

    The mission of the West Metro Regional Drug Enforcement Office is to aggressively seek out, dismantle, and prosecute drug trafficking organizations (DTO’s), drug traffickers and drug related violent criminals.

    Meth lab discovered inside Chamblee hotel
    Sat, Jan 25th, 2014

    Channel 2 Action News was at the scene as the Georgia Bureau of Investigations began their investigation. Our crews watched them, armed with search warrant, go inside and investigate the meth lab.



    Home – Port Washington Police Department #port #washington #police #department, #port #washington, #wisconsin, #53074, #ozaukee #county, #city, #262-284-2611, #agency, #government, #law #enforcement, #officer


    #

    Where Citizens Are First

    Our Mission

    The mission of the Port Washington Police Department is to enhance the quality of life in our city by working in partnership with the community, to protect and serve the community’s quest for a peaceful and safe existence, with democratic values applied equally to all citizens.

    We Commit To These Values

    • Public trust
    • Human life above anything else
    • Community opinion and response
    • Courtesy, compassion and respect
    • Problem solving
    • Teamwork
    • Integrity

    The Port Washington Police Department proudly serves an estimated population of 11,439. In addition, the city experiences a significant seasonal increase in population due to a growing number of tourists visiting the area each year. As of early 2005, the department regularly patrols nearly 50 total road miles within the city.

    The Port Washington Police Department provides a multitude of services to the community in a number of areas including traffic safety; adult, juvenile, and youth programs; investigative, crime prevention and general administration.

    The current staffing level is twenty sworn police officers. When operating at authorized staffing level, our ratio of officers per 1,000 of established population is 1.6.

    Sworn personnel consist of the Chief of Police and the Captain of Administration, representing the Administrative Division. The Patrol and Investigative Division is staffed by the Captain of Operations and three Lieutenants, supervising thirteen patrol officers.

    Civilian support personnel include three full-time records management employees, one municipal court clerk who is also the Records Manager, one administrative assistant, one parking enforcement officer and one custodian shared with City Hall.

    If you have concerns regarding this web site, please e-mail Chief Kevin Hingiss .



    Harvard University Department of Physics #answer #and #questions


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Oklahoma Insurance Department – Licensee Lookup #oklahoma #insurance #department,license,your,licensee,page,if,name,click,submit,link,entity,number,up,enter,look,business,individual,type,you,number),then, #ndash,know,not,partial


    #

    Licensee Look-Up

    Click on the link above to view a license online.

    Change the Licensee Type drop down menu to either Individual or Business Entity.
    Note: Not all of the fields on this page need to be entered.

    • Individual Enter your license number if known (OR enter last name and first name to find your license number) then click submit.
    • Business Entity Enter your license number (or EIN if you do not know your number) and partial business name then click submit.

    The results page will be displayed. Scroll to the bottom of the page and your license should be listed.
    The blue Name and License Type will provide additional information, such as company appointments, if you click on the link.

    Click here for a Letter of Good Standing



    Department of Mathematics #science #homework #answers


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Raymond F #university #of #pittsburgh,department #of #neurosurgery,ray,raymond,sekula,biography,trigeminal #neuralgia,hemifacial #spasm,mvd,microvascular #decompression,cranial #nerve,chiari #malformation,skull #base,brainstem,microvascular #surgery,neurosurgeon,surgeon,doctor,resident,school #of #medicine,medical #center,upmc,neurosurgery,neurological #surgery,pennsylvania


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    Raymond F. Sekula Jr. MD, MBA

    Biography

    Raymond Sekula Jr. MD, joined the Department of Neurological Surgery on March 1, 2013 as an assistant professor and director of the department’s Cranial Nerve and Brainstem Disorders program and was promoted to associate professor in 2015.

    Dr. Sekula is known internationally and nationally for his development of microvascular techniques, which provide patients with improved outcomes, reduced complications, and easier recoveries. He has performed more than 1,500 procedures for patients with trigeminal neuralgia, hemifacial spasm, and other cranial neuralgias. He has also developed techniques in brain surgeries of all types that reduce patients’ hospital stays to one or two days without the need for the intensive care unit after the procedure.

    He has been recognized with numerous honors, including The American Association of Neurological Surgeon’s Young Investigator Award, The Trigeminal Neuralgia Association Fellowship Award, and Pittsburgh Magazine’s “40 Under 40” and “Best Doctor’s” Award.

    Dr. Sekula received his undergraduate degree from the University of Virginia and his medical degree from Georgetown University School of Medicine. Following a surgical internship and residency in neurological surgery, he completed advanced training in minimally invasive neurosurgery and a fellowship with neurosurgical pioneer, and former University of Pittsburgh Department of Neurological Surgery chairman, Peter Jannetta, MD. Following his training, he became assistant, and then co-director, of the Cranial Nerve Disorders Center with Dr. Jannetta in Pittsburgh.

    Dr. Sekula is also a renowned teacher of neurological surgery and is a frequent lecturer nationally and internationally. He has been awarded the annual faculty teaching award by the department’s residents in 2015 and 2016. Dr. Sekula has authored or co-authored many original journal articles and book chapters, and is coeditor of the textbook Microvascular Decompression Surgery . a comprehensive look at MVD surgery, widely accepted as an effective remedy for cranial nerve hyperexcitability disorders including hemifacial spasm, trigeminal neuralgia, and glossopharyngeal neuralgia.

    Specialized Areas of Interest

    Minimally invasive brain and spine surgery, trigeminal neuralgia, hemifacial spasm, brain and skull base tumors.

    Board Certifications

    American Board of Neurological Surgery

    Hospital Privileges

    UPMC Hamot
    UPMC Mercy
    UPMC Passavant
    UPMC Presbyterian

    Professional Organization Membership

    Allegheny County Medical Society
    American Association of Neurological Surgeons
    AANS/CNS Section on Pain
    Congress of Neurological Surgeons
    Facial Pain Association
    Medical Advisory Board of TNA
    Pennsylvania Neurosurgical Society

    Education Training

    BA, Classics, University of Virginia, 1994
    MD, Georgetown, 2000
    Residency, Pediatric Neurosurgery, Children’s Hospital of Pittsburgh 2004
    Residency, Neurosurgery, Allegheny General Hospital, 2006
    Fellowship, Microvascular Skull Base Surgery, 2006
    MBA, Carnegie Mellon University, 2009

    Honors Awards

    Pittsburgh Magazine “Best Doctors” Award, 2014-15
    Department of Neurological Surgery Faculty Teaching Award, 2015.

    Selected Publications

    Foster KA, Shin SS, Prabhu B, Fredrickson A, Sekula RF Jr. Calcium phosphate cement cranioplasty decreases the rate of CSF leak and wound infection compared to titanium mesh cranioplasty: retrospective study of 672 patients. World Neurosurg [Epub ahead of print], 2016.

    Hughes MA, Frederickson AM, Branstetter BF, Zhu X, Sekula RF Jr. MRI of the Trigeminal Nerve in Patients With Trigeminal Neuralgia Secondary to Vascular Compression. AJR Am J Roentgenol 206(3):595-600, 2016.

    Panczykowski DM, Frederickson AM, Hughes MA, Oskin JE, Stevens DR, Sekula RF Jr. A Blinded, Case-Control Trial Assessing the Value of SSFP MRI in the Diagnosis of Trigeminal Neuralgia. World Neurosurg [Epub ahead of print], 2015.

    Thirumala P, Frederickson AM, Balzer J, Crammond D, Habeych ME, Chang YF, Sekula RF Jr. Reduction in high-frequency hearing loss following technical modifications to microvascular decompression for hemifacial spasm. J Neurosurg 123(4):1059-64, 2015.

    Hughes MA, Branstetter BF, Taylor CT, Fakhran S, Delfyett WT, Frederickson AM, Sekula RF Jr. MRI findings in patients with a history of failed prior microvascular decompression for hemifacial spasm: how to image and where to look. AJNR Am J Neuroradiol 36(4):768-73, 2015.

    Thomas KL, Hughes MA, Frederickson AM, Branstetter BF 4th, Vilensky JA, Sekula RF. Hemifacial spasm caused by an aberrant jugular branch of the ascending pharyngeal artery. Br J Neurosurg [Epub ahead of print], 2014.

    Sekula RF Jr, Frederickson AM, Branstetter BF 4th, Oskin JE, Stevens DR, Zwagerman NT, Grandhi R, Hughes MA. Thin-slice T2 MRI imaging predicts vascular pathology in hemifacial spasm: a case-control study. Mov Disord 29(10):1299-303, 2014.

    Sekula RF Jr, Frederickson AM, Arnone GD, Quigley MR, Hallett M. Microvascular decompression for hemifacial spasm in patients 65 years of age: an analysis of outcomes and complications. Muscle Nerve 48(5):770-6, 2013.

    Frederickson AM, Sekula RF Jr. The utility of calcium phosphate cement in cranioplasty following retromastoid craniectomy for cranial neuralgias.
    Br J Neurosurg 27 (6):808-11, 2013.

    Sekula RF Jr, Arnone GD, Crocker C, Aziz KM, Alperin N. The pathogenesis of Chiari I malformation and syringomyelia. Neurol Res 33(3):232-9, 2011.

    A complete list of Dr. Sekula’s publications can be reviewed through the National Library of Medicine’s publication database.

    Media Appearances

    Chapter Profile: Pitt Neurosurgery Interest Group
    Winter 2016
    Young Neurosurgeons News

    UPMC OnTopic Videos

    Microvascular Decompression in the Treatment of Cranial Nerve Disorders
    Dr. Sekula discusses the recent improvements and refinements made to the microvascular decompression procedure.

    Hemifacial Spasm
    Dr. Sekula speaks about microvascular decompression treatment for hemifacial spasm.

    Trigeminal Neuralgia
    Dr. Sekula speaks about microvascular decompression treatment for trigeminal neuralgia.



    Willard Drug Treatment Campus – New York #new #york,new #york #department #of #corrections #and #community #supervision,new #york #state #prisons,seneca #county,state #prisons,willard,willard #drug #treatment #campus


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    Willard Drug Treatment Campus New York

    Do you know somebody locked up at Willard Drug Treatment Campus? Willard Drug Treatment Campus is a correctional facility in the New York Department of Corrections and Community Supervision. This page will tell you all about everything you might need to know about Willard Drug Treatment Campus,like the following: Find an inmate at Willard Drug Treatment Campus. Visiting an inmate at this prison The address and phone number at Willard Drug Treatment Campus How to send mail and money to an inmate. And everything else.

    Main Menu

    Here you will find the mailing address and street address for Willard Drug Treatment Campus. Use the mailing address if you are going to mail a letter or package to a prisoner at Willard Drug Treatment Campus, and be sure to use the physical address if you want to know the actual location of Willard Drug Treatment Campus.

    Mailing Address

    Make sure to read over the Inmate Mail and Package Procedures section further down on this page if you are going to mail a letter or package to an inmate to make sure that you correctly write the address, and do the appropriate steps for sending a letter or package. If you do not use the appropriate directions, the package or letter could not get delivered.
    INMATE NAME AND REGISTER NUMBER
    Willard Drug Treatment Campus
    7116 County Route 132 P.O. Box 303
    Willard NY, 14588-0303

    Street Address / Prison Location

    Address

    Willard Drug Treatment Campus inmates can t take phone calls, so you can t call an inmate, but, there are some times when it might be helpful to know the phone number to Willard Drug Treatment Campus.
    (607) 869-5500

    State prison inmates can sometimes call out using:

    • Calling Cards
    • Collect Calls
    • Dedicated Phone Line
    • Prison Calling Plan

    Fax Number

    Willard Drug Treatment Campus prisoners don t have fax machines, so you won t be able to send a fax to your inmate, but there are cases when it may be helpful to have the fax number to the facility.

    Email Address

    This is the general email for Willard Drug Treatment Campus. You can t email prisoners using this email address. If you are going to send an email to an inmate, check out the Inmate Email information further down on this page.

    Inmate and Staff Statistics

    Victim s Rights

    The Victim Rights Act grants victims the following rights:

    • Victims have the right to protection from the accused.
    • Victims have the right to notification.
    • Victims have the right to attend proceedings.
    • Victims have the right to speak at criminal justice proceedings.
    • Victims have the right to consult with the prosecuting attorney.
    • Victims have the right to restitution.
    • Victims have the right to a speedy trial.
    • Victims have the right to be treated with fairness, dignity and respect.

    The definition of victim includes:

    • Spouses and children of all victims.
    • Parents and guardians of minor victims.
    • Parents, guardians and siblings of mentally or physically incapacitated victims or victims of homicide.
    • Foster parents or other caregivers, under certain circumstances.

    There are a number of services and programs designed to help victims and their families. You can find out about these services by contacting the courthouse, or local law enforcement agency.

    Victim Notification

    The Department of Justice Victim Notification System (VNS) is a system that provides victims with information pertaining to their case and/or any defendants in the case. You will receive a Victim Identification Number (VIN) and a Personal Identification Number (PIN) that will allow you to access VNS via the internet or by phone. Here, you will find information about future court hearings, historical court events, and detailed information about the defendant. This will include criminal charges filed, the outcome of charges, sentence imposed, custody location, projected release date and any other release information. The VNS website is updated daily. You will also receive any ongoing information by mail or email.

    Have you, a family member or friend ever used the Victim Notification System? If so, was it effective? Did you get the information in a timely manner? Was the system difficult to use? We would like to hear from you, so please post any comments here.

    Family Resources



    Inferior Vena Cava (IVC) Filters – University of Michigan Vascular Surgery #ivc #filter,ivc #filters,inferior #vena #cava #filter,greenfield #filter,what #is #an #ivc #filter,ivc #filter #risks,ivc #filter #surgeons,pulmonary #embolism,pe,embolism,vascular #surgery, #department #of #surgery, #university #of #michigan, #detroit, #ann #arbor, #southeast #michigan


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    Inferior Vena Cava (IVC) Filters

    The Vascular Surgery team at the University of Michigan is dedicated to providing exceptional patient care in the U-M Cardiovascular Center (CVC), our new state-of-the-art clinical building.

    Our vascular surgeons have extensive experience in placing inferior vena cava (IVC) filters to help prevent pulmonary emboli and we are continuing to investigate and research new advances for treatment in this area.

    What is an IVC filter?

    The inferior vena cava is the largest vein in the body. It carries de-oxygenated blood from the lower extremities to the right atrium of the heart and then to the lungs.

    An inferior vena cava filter or IVC filter is a small cone-shaped device that is implanted in the inferior vena cava just below the kidneys. The filter is designed to capture an embolism, a blood clot that has broken loose from one of the deep veins in the legs on its way to the heart and lungs.

    Without the IVC filter in place, there would be the potential for the embolism to cause a blockage of the pulmonary artery. The pulmonary arteries carry deoxygenated blood from the heart to the lungs. Blockage of one or both arteries is referred to as a pulmonary embolism (PE) and can cause difficulty breathing, chest pain, and death.

    The IVC filter works by permitting blood flow to continue around the trapped clot. Over time, natural anticoagulants in the blood will help to break the clot down.

    Who is a good candidate to receive an IVC filter?

    You are a good candidate for the placement of an IVC filter if:

    • You continue to develop deep vein thrombosis (DVT) or pulmonary emboli despite the monitored use of anticoagulants (e.g. Coumadin, low-molecular-weight heparin).
    • You are at risk of a pulmonary embolism, but cannot tolerate anticoagulation therapy due to another condition that puts you at the risk of bleeding.
    • You develop significant bleeding complications from anticoagulation
    • You have large clots in the inferior vena cava or iliac veins

    U-M vascular surgeons who perform IVC filter placement

    For details about education, experience, and specialty in this clinical area, please visits these physician profile pages:

    How do I prepare for the placement of an IVC filter?

    Your doctor will give you detailed instructions as to how to prepare for the procedure. These may include a suggestion to eat a light meal the night before the procedure and to not eat or drink anything after midnight before the procedure. If you regularly take any important medicines, your physician may ask you to take them on the day of surgery with a sip of water.

    Follow your doctor’s instructions about not smoking before and after the procedure. Smokers heal more slowly after surgery. They are also more likely to have breathing problems during surgery. For this reason, if you are a smoker, you should quit at least 2 weeks before the procedure. It is best to quit 6 to 8 weeks before surgery. Also, your body will heal much better if you do not smoke after the surgery.

    Other Considerations

    • Plan for your care and transportation after the procedure and during recovery at home.
    • Before the procedure tell your health care provider if you have had any kidney problems or reactions to iodine-containing foods or chemicals, such as seafood or kidney contrast dye.
    • Before surgery, your health care provider will ask you to sign a consent form for angioplasty, bypass surgery, and angiography. Angiography is an x-ray study of the blood vessels using dye. This consent form is needed in case problems arise during the procedure and emergency surgery is needed.
    • You will have imaging studies, blood tests, and an electrocardiogram (ECG) before the procedure.
    • Someone at the hospital will shave and wash the area where the catheter will be inserted (neck or groin). This is to help prevent infection.

    What happens during the procedure?

    IVC filter placement is an endovascular procedure, meaning that the filter is inserted via a blood vessel. Typically, the femoral vein in the groin, or the internal jugular vein in the neck, is used.

    You will be given a local anesthetic to numb the area where the catheter will be inserted. You will stay awake during the procedure, but will be sedated for comfort.

    Your vascular surgeon will thread a thin guide wire through a needle inserted into a blood vessel in your neck or groin. A contrast dye will be injected into and x-rays will be taken as the dye moves through the bloodstream. Using these x-ray images, an IVC filter catheter will be advanced along the guidewire to the location of the placement. The IVC filter is then pushed through the catheter and deployed in the desired location. Once complete the catheter is then removed.

    What happens after the procedure?

    You will go back to your hospital room and rest in bed for 12 to 24 hours. You will most likely be able to go home the next day. You can usually resume normal activity within a day or two. Your doctor will let you know when you can return to work.

    What are the risks?

    • You may have an allergic reaction to the local anesthetic or x-ray dye.
    • You may bleed a lot and need medicine or a blood transfusion.
    • The vein may be damaged. For example, the vein might be perforated during the procedure. Emergency bypass surgery or repair of the perforation (hole) would then be needed.
    • Although rare, the IVC filter itself may cause clots to form.
    • The IVC filter may shift following surgery, which would require that it be captured and repositioned.
    • Clots can still bypass the filter causing pulmonary embolism, however the risk is significantly reduced.
    • There is a risk of injury to the neck or groin where the catheter was inserted.

    There is risk with every treatment or procedure. Talk to your surgeon for complete information about how the risks apply to you.

    How can I take care of myself following surgery?

    • Do not smoke.
    • Eat a healthy diet that is low in fat and cholesterol.
    • Exercise according to your health care provider’s recommendation.
    • Keep your appointment for your scheduled post-discharge office visit.

    When should I call my health care provider?

    Call your health care provider right away if:

    • You have chest pain.
    • You have constant or worsening pain or numbness in your arm or leg.
    • You have a fever.
    • You have shortness of breath.
    • Your leg becomes blue and cold.
    • You have bleeding, excess bruising, or a lot of swelling where the catheter was inserted.


    Plumbing irving #food #inspection,health #inspection,building #inspection,inspections #department


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    Inspections

    About the Department

    The mission of the Inspections Department is to serve developers and contractors in meeting their goals and to verify code and ordinance compliance to protect the public. The Inspections Department issues building and related permits and inspects both new construction and remodels.

    Health Inspections and Building Standards

    The Health Inspectors are responsible for restaurant sanitation inspections, pools at hotels and apartment complexes, nursing homes, and day cares.

    The Building Standards Division
    works with owners to improve the condition of existing structures.

    Permits (Plan Review and Inspections)

    Permits are required for most types of work on a building or building system such as plumbing and electrical, signs, fences, and accessory structures like storage buildings and pools. Please check with us regarding a permit before you begin work at (972) 721-2371 .

    Pre-Development Meetings

    We can schedule a one-hour Pre-Development Meeting with Planning, Inspections, Fire, Traffic, Engineering, and Water Departments. To request a meeting, please fill out the
    Pre-Development form.



    Temporary Disability Insurance, RI Dept #rhode #island #department #of #labor #and #training, #unemployment #insurance, #temporary #disability #insurance, #employment #security, #workers’ #compensation, #workforce #regulation #and #safety, #professional #regulation, #occupational #safety, #apprenticeship, #labor #market #information, #employment, #unemployment, #workforce #development, #workforce #investment #office, #trade #adjustment #assistance, #rapid #response, #workshare, #prevailing #wage


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    TDI provides benefit payments to insured RI workers for weeks of unemployment caused by a temporary disability or injury. The TDI program, enacted in 1942, was the first of its kind in the United States. It protects workers against wage loss resulting from a non-work related illness or injury, and is funded exclusively by Rhode Island workers. Only four other states; New York, New Jersey, California and Hawaii, as well as the commonwealth of Puerto Rico, have a TDI program.

    Temporary Disability Insurance (TDI) benefits are not subject to Federal or State income taxes; therefore, you will not receive a G-1099 form from TDI.

    Temporary Caregiver Insurance (TCI) benefits are subject to Federal and State income taxes. If you receive TCI benefits, you will receive a General Form (G-1099) in January of the year following the year in which you were paid TCI benefits indicating the amount you received. This amount will also be reported to the IRS.

    Click here to download your 1099 Tax Form for TCI
    INTERNET EXPLORER v10 USERS – You must chose compatibility view before advancing through the claims-filing screens. To choose compatibility view, click on the broken-paper image next to the URL address at the top of the page.


    1099 Forms for Temporary Caregiver Insurance Customers

    Temporary Caregivers Insurance Brochure

    TCI Awareness, Access and Outcomes

    Click here for additional information

    TDI customers can download the TDI/TCI applicatio n from our website.

    Temporary Caregiver Insurance Program
    The new Temporary Caregiver Insurance Program (TCI) was signed into law on July 11, 2013. TCI will provide eligible claimants up to four weeks of caregiver benefits to care for a seriously ill child, spouse, domestic partner, parent, parent-in-law or grandparent, or to bond with a newborn child, new adopted child or new foster-care child.

    TCI claims will only be accepted as of January 5, 2014. You may file online or click here to download a paper application; or you may call (401) 462-8420 and select option 1 for a paper application to be mailed to your home.

    Legislative Change Regarding the Seven Day Non-Paid Waiting Period: New claims filed with an effective date of 7/1/12 or later, the un-paid waiting period week is eliminated due to a legislative law change. An individual is still required to be out of work for a minimum of seven consecutive days in order to be eligible for benefits if filing a new claim or refilling on an already established claim.

    Maximum Benefit Rate Increase:
    Claims with a Benefit Year Begin Date of 7/3/16 or later, $89.00 is the minimum benefit rate and $817.00 is the maximum benefit rate. This does not include dependency allowance. The weekly benefit rate remains the same throughout the entire benefit year.

    First Payments – Most eligible customers get their first payment within 3-4 weeks from the day we receive a valid application. Missing, or incorrect information may delay payment. Prompt responses from QHPs are needed to process claims. An individual is required to be out of work for at least seven (7) consecutive days in order to be eligible for benefits.

    Can I file my claim ahead of time? No, you may not file your claim ahead of time. A claim cannot be entered into the system until after you are out of work.

    What is the timely “medical-exam-date” requirement? TDI law requires the claimant to be examined by a Qualified Healthcare Provider (QHP) within the calendar week in which the first day of unemployment due to illness occurs or in the calendar week prior or the week following the disability date

    Click here to file a claim online.

    To check the status of your claim, click here . You will need your Social Security number and confirmation number to check the status of your internet-filed claim.

    If you work for two or more RI Employers during one year, you may be eligible for a TDI Tax Refund. If you think you’re eligible, download the TDI Refund Notice .

    Our customers can now download the application from our web site. Click here to download the application, or call (401) 462-8420, option #1, and provide your name, address, phone number and social security number. A paper application will automatically be mailed to you on the following day. Due to high call volume, wait times for customer assistance may exceed 20 minutes.

    The TDI/TCI program is financed entirely by employee payroll deductions. The current withholding rate as of January 1, 2017 is 1.2% of your first $68,100 in earnings. Workers aged 14 and 15 are exempt from wage deductions and coverage. If you worked for more than one RI employer in a calendar year and your total wages were more than $66,300 (in 2016), you may be entitled to a TDI tax refund. To download a TDI tax refund claim form on-line, click here . You can also obtain the refund form from the Division of Taxation, 1 Capitol Hill-Suite 36, Providence, RI 02908, (401) 574-8700.

    Most individuals who work in Rhode Island, regardless of place of residence, are covered by TDI. (Exceptions include federal, state and some municipal employees as well as partners and non-incorporated self employed workers.) To be eligible, an individual must meet certain earnings requirements and be medically certified by a certified health care provider as unable to work.

    Temporary Caregiver Insurance (TCI) benefit payments are taxable and the department will provide a statement, IRS Form 1099G, of the total amount of benefits received during the year. This information will also be provided to the Internal Revenue Service (IRS).

    Temporary Disability Insurance (TDI) benefit payments are not taxable therefor the department will not be providing an IRS Form 1099G.



    Harvard University Department of Physics #homework #answers #free


    #physics answers

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    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #call #answering #service


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Harvard University Department of Physics #biology #answers #online


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #yaho #answers


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Harvard University Department of Physics #true #and #false #answers


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #telephone #answering


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Harvard University Department of Physics #question #and #answer #sites


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #answer #questions #online


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Harvard University Department of Physics #question #and #answer #sites


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #phone #answering #service


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.


    Harvard University Department of Physics #question #answer


    #physics answers

    #

    UPCOMING EVENTS

    1. PRT SEM: Masaki Yamada (TUFTS) Strongly interacting massive particle (SIMP) and a strong U(1) gauge theory
      Start: 04:15pm – End: 05:15pm
      • 04:15pm

    “A strongly interacting massive particle (SIMP) is a good candidate for dark matter (DM) because its self-interaction can address some astrophysical offsets, such as the “core vs cusp” problem and the “too-big-to-fail” problem. A low energy effective theory of a strongly interacting non-Abelian gauge theory gives a simple realization of the SIMP mechanism in a dark sector, though we need to introduce a nontrivial interaction between the Standard Model (SM) sector and the dark sector to maintain kinetic equilibrium. In this talk, I will first explain a SIMP model in a strong non-Abelian gauge theory with a singlet field in the hidden sector. Assuming a mixing between the singlet field and the SM Higgs field, we can maintain the kinetic equilibrium between the hidden and SM sectors. The mixing effect leads to signals for future collider experiments, direct DM detection experiments, and beam-dump experiments. Then I will explain a SIMP model in an Abelian gauge theory that is confined due to a monopole condensation. This model is much simpler because the monopole plays the roles of U(1) confinement and mediator between the hidden and SM sectors.”

    1. CMP Special Seminar: Arbel Haim (The Weizmann Institute), hosted by Bertrand Halperin
      Start: 03:00pm – End: 04:30pm
      • 03:00pm

    Title: “Current aspects of topological superconductivity”

    Abstract: Recent experiments have provided mounting evidence for the existence of Majorana bound states (MBSs) in condensed-matter systems. Until the long-term goal of braiding MBSs is achieved, one is prompted to ask: what is the next step in the study of topological superconductivity and MBSs? In my talk I will discuss two topics relating to this question. In the first part I will examine the possibility of, not only detecting the Majoranas, but also witnessing some of their exotic properties. In particular their non-local nature, or in other words, the fact that the MBS is half a fermion whose occupation is encoded in a nonlocal way. I will show that current cross correlations in a T-junction with a single MBS exhibit universal features, related to the Majorana nonlocality. This will be contrasted with the case of an accidental low-energy Andreev bound state. In the second part I will discuss the possibility of realizing a different topological phase hosting MBSs in currently available experimental platforms. This will be a topological superconducting phase which is protected by time-reversal symmetry, and which is characterized by having a Kramers’ pair of MBSs at each end. As I will discuss, repulsive interactions are a necessary ingredient for the realization of this phase. I will present a mechanism, based on the interplay between repulsive interactions and proximity to a conventional superconductor, which drives the system into the topological phase. The effect of interactions is studied analytically using both a mean-field approach and the renormalization group. We corroborate our conclusions numerically using DMRG.

    [1] Arbel Haim, Anna Keselman, Erez Berg, Yuval Oreg, Phys. Rev. B, 89, 220504(R) (2014)
    [2] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. B, 92, 245112 (2015)
    [3] Arbel Haim, Erez Berg, Felix von Oppen, Yuval Oreg, Phys. Rev. Lett. 114, 166406 (2015)
    [4] Arbel Haim, Konrad Wölms, Erez Berg, Yuval Oreg, Karsten Flensberg, Phys. Rev. B 94, 115124 (2016)
    [5] Arbel Haim, Erez Berg, Karsten Flensberg, Yuval Oreg, arXiv:1605.07179

    Thursday, October 27th

    1. CMP Seminar: Victor Galitski (University of Maryland), hosted by Eugene Demler
      Start: 12:00pm – End: 01:00pm
      • 12:00pm

    Title: Soliton motion, dissipation, and death in quantum superfluids

    Abstract: Solitons are fascinating non-linear phenomena that occur in a diverse array of classical and quantum systems. In particular, they are known to exist in quantum superfluids, and have been demonstrated experimentally in Bose-Einstein condensates and fermionic superfluids. In this talk, I will first review the general theory of solitons in superfluids and present an exact solution to the problem of a moving soliton in a one-dimensional superconductor. Connections to the inverse scattering method and supersymmetric quantum mechanics will be emphasized. Using these exact methods, the full soliton spectrum will be derived along with its “inertial” and “gravitational” masses. The former will be shown to be orders of magnitude larger than the latter. This results in slow motion of the soliton, consistent with recent MIT experiments. In the second part of my talk, I will discuss the soliton decay and derive the quasiclassical equations of motion containing a non-local in time friction force. Interestingly, Ohmic friction is absent in the integrable setup and the Markovian approximation gives rise to the Abraham-Lorentz force (i.e. a term proportional to the derivative of the soliton’s acceleration), which is known from classical electrodynamics of a charged particle interacting with its own radiation. These Abraham-Lorentz equations famously contain a fundamental causality paradox, where the soliton/particle interacts with excitations/radiation originating from future events. We show, however, that the causality paradox is an artifact of the Markovian approximation, and our exact non-Markovian dissipative equations give rise to physical trajectories. In the end, I will show results of recent experiment that observed soliton diffusion and decay in superfluids, well described by our theory.

    Relativistic electron scattering and QED

    Abstract:
    The results of non-perturbative relativistic electron-atom scattering calculations are presented. Hans Bethe’s work on relativistic electron scattering in the 1930’s is also discussed, together with various historical aspects of Enrico Fermi’s and Bethe’s early QED papers. The evolution of ideas related to the use of renormalization in quantum field theory are outlined.

  • View in Google Calendar
  • STR SEM: Sam McCandish (Stanford) A Stereoscopic Look into the Bulk
    Start: 04:15pm – End: 05:15pm
    • 04:15pm
    • We present the foundation for a holographic dictionary with depth perception. The dictionary consists of natural operators associated with CFT bilocals whose duals are simple, diffeomorphism-invariant bulk operators. These objects admit a description as fields in kinematic space, a phase space for such probes. The framework of kinematic space allows for conceptually simple derivations of many results known in the literature, including linearized Einstein’s equations, the relationship between conformal blocks and geodesic Witten diagrams, and the CFT representation of bulk local operators. Reference: https://arxiv.org/abs/1604.03110

      Friday, October 28th

      Monday, October 31st

      1. Ali Yazdani (Princeton): Loeb Lecture in Physics: Spotting the elusive Majorana under the microscope
        Start: 04:15pm – End: 06:15pm
        • 04:15pm
        • View in Google Calendar
      2. Loeb Colloquium: Ali Yazdani (Princeton), Visualizing a nematic quantum liquid
        Start: 04:15pm – End: 06:00pm
        • 04:15pm

      The MORRIS LOEB LECTURES IN PHYSICS SERIES
      Speaker: Ali Yazdani,
      Class of 1909 Professor of Physics,
      Director of the Princeton Center for Complex Materials
      Princeton University

      The lecture is free and open to the public
      https://www.physics.harvard.edu/events/loeb



  • Department of Mathematics #dictionary #and #thesaurus #free


    #webassign answers

    #

    WebAssign is an on-line homework system used in Math 112, 113, 115, 115B, 140, 140, 140H, 141, 141H, 220 and 221.

    Please read through the directions below before logging into WebAssign.

    Logging into the WebAssign system:

      • There are two methods of payment: credit card, or at the bookstore. You will see more information about this when you log on to webassign. The cost is $19.95 per semester per course as of Fall 2012.

    Selecting an Assignment:

      • Once you have successfully logged in, you will see an assignment list with information such as how many tries you have to complete each problem and when the assignment is due.
      • Select the assignment you want to work on.

    Question Types – Within WebAssign there are different types of questions that can be asked, including Multiple Choice, Numerical, and Symbolic. Each type of question should be handled slightly differently.

        • Appearance: The question will be followed by a list of possible solutions. Next to each will be a square containing a circle called a radio button.
        • Use: Radio buttons only allow you to select one answer. If you try to select more than one, only the last answer you select will be counted.
        • Example: Problem 1 of the Assignment WA1.
        • Appearance: Like Multiple choice questions, Multiple Select Questions will be followed by a list of possible answers. However, next to each possible answer will be a square checkbox.
        • Use: A checkbox allows you to choose more than one answer. To get the problem correct you must check all of the correct answers. If you check an answer and then decide this answer is not correct, simply click on the box again and the check will disappear.
        • Example: Problem 2 of the Assignment WA1.

    Numerical, Symbolic, and Fill-in-the blank

        • Appearance: Numerical, Symbolic, and Fill-in-the-Blank questions will all appear the same on the screen. Somewhere within or at the end of the problem, you will see a rectangular box.
        • Use: Clicking in the box will allow you to enter your answer.

    How do I know the difference? If the question asks for an answer which is a word, then this is a fill in the blank question. If the question says that you may use specific variables or constants within your answer, then it is a symbolic question. Otherwise, it is a Numerical question.

    Things to keep in mind:

      • Fill-in-the-Blanks are not case sensitive but be very careful to enter the answer with the correct spelling.
      • Symbolic questions are case sensitive. If the question states that you may use the variable “t” if you use “T,” then your answer will graded as wrong.
      • Numerical questions accept only numbers. You may not use any type of variable or function within your answer.
      • After answering all the questions, submit your assignment. Be aware of the maximum number of times you can submit the assignment (this may vary with the assignment).
      • Some of the symbols within the problems might look unusually large or small compared to the text
      • The equations seem to be wrapping around and becoming jumbled and unreadable.
      • The symbols within your assignments have been formatted to match a reasonable text size. If your computer web browser is not set to this size you may have trouble reading the problems. To change this setting, you must change the text size in your browser preferences. Here is how you would do this in Internet Explorer or Firefox:
          • Open the View menu at the top of the browser window.
          • Select Text Size from this mune
          • Set the text size to Largest
          • Open the Edit menu at the top of the browser window and go to Preferences (in some versions of Firefox) or the Options menu in the upper left (in more recent versions).
          • Select the Content tab and then go to Fonts and Colors .
          • Set the Font Size to 18 (both variable and fixed width).
      • Most of the problems within your assignments were created using some sort of formatting table. If your browser window is too small, this can cause the equations to line up improperly. To fix this, you should maximize your window by clicking on the maximize button in the top right hand corner of the window.