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  1. Phylosopher

    Physics Job prospects for accelerator physics

    GE is American, SIEMENS is German.
  2. Phylosopher

    BSc in Meteorology with no experience -- Is it reasonable to look for international jobs?

    It depends on the country you are applying to and the country you are from. I was living in a two/third world country at the time I graduated with my BSc., I tried to find jobs internationally without any experience and I failed miserably XD I applied to around 30 companies/institutions, no...
  3. Phylosopher

    Salary at work: Satisfied?

    In my previous job, one of the contract points clearly states that you CANNOT discuss your salary with any other employee in the institution.
  4. Phylosopher

    Physics Job prospects for accelerator physics

    The main accelerator physics job I can think of is that related to medical physics. Currently, the business of medical accelerators is booming... The most widely used ones as far as I know are cyclotrons. They are used to make radioactive injections for PET and SPECT scans. In the time being...
  5. Phylosopher

    Relativity Spacetime Physics and Black Hole Physics

    I studied from Sean Carrol book and use misner-thorne-wheeler book as a reference, how would you compare these two to them?
  6. Phylosopher

    Are supercomputers profitable?

    When I look at the largest supercomputers, I see governmental institutions and electronic companies. That is, no service providing companies: (wiki) 1- Riken (Funded by the Japanese government) 2- Oak Ridge National Laboratory 3- Lawrence Livermore National Laboratory 4- National Supercomputing...
  7. Phylosopher

    Are supercomputers profitable?

    I am wondering whether supercomputers are profitable! I am no computer engineer/scientist, but it seems that it could be. I tried to search on google, on whether supercomputers are in fact profitable, but I couldn't find a suitable source. Also, with the rise of cloud computing such as AWS, I...
  8. Phylosopher

    Quantum Is Zuber's Quantum Field Theory textbook any good?

    Hi, I have been studying Quantum Field Theory this semester! It seems that Shwartz and Peskin are the most popular choices when it comes to studying QFT. But apparantly my professor have another "old" preference. He strongly suggested that we learn QFT from Zuber's book. I have looked at the...
  9. Phylosopher

    Other How to find an internship through university staff?

    Hello everyone, I would like your advice on the matter of internships... Usually every year, no matter the situation, I apply for internships/training for the summer... Sometimes I succeed in finding one and sometimes I fail. It became a habit to always search for internships (Hopefully a good...
  10. Phylosopher

    I Why perturbation theory uses power series?

    Ref1 in my original post claims that using "regular" purterbation is not enough to find all the possible solutions for the following equation ##x^{2}-1=\epsilon e^{x}## But it is enough to find the solutions of ##x^{2}-1=\epsilon x##
  11. Phylosopher

    I Why perturbation theory uses power series?

    I am revising perturbation theory from Griffiths introduction to quantum mechanics. Griffiths uses power series to represent the perturbation in the system due to small change in the Hamiltonian. But I see no justification for it! Other than the fact that it works. I searched on the internet a...
  12. Phylosopher

    Admissions Postponing starting my Master's degree (Germany)

    Thank you for your reply. Yes I have looked for scholarships. The university does not offer any, and the deadline for all the external scholarships that I know of has passed. Even if there is one, it will take around a month or two for a decision, and I only have around 10 days to decide...
  13. Phylosopher

    Admissions Postponing starting my Master's degree (Germany)

    Update The university advised me to basically apply again for the Winter semester. As I understand, this means that I will have to reject the current offer and reapply. The outcome of the Winter semester screening may be positive or negative, and it is not necessarily tied to this year...
  14. Phylosopher

    Admissions Postponing starting my Master's degree (Germany)

    I wrote, still waiting for a response. But I wanted to know if this is a common thing or not. Also, whether such cases are usually accepted from universities.
  15. Phylosopher

    Admissions Postponing starting my Master's degree (Germany)

    Hi, I have been accepted in one of the top universities in Germany. The program starts not very far from today (Summer 2020). Problem is that I have just established myself in my career as a teacher and I do not have a lot of money to support myself abroad. (just started two months from now)...
  16. Phylosopher

    Remote Desktop Connection between PCs -- Must they both be in the same Subnet?

    For something very straightforward and with no technicalities, I use a program called anydesk. Very sweet if you ask me.
  17. Phylosopher

    I Aberration of light in circular motion, what happens to distance?

    at ##t## I guess! Since I should be an observer in ##S##.
  18. Phylosopher

    I Aberration of light in circular motion, what happens to distance?

    Don't say that LOL. I am actually aware of this! I was hoping that someone can lead me to a simpler answer. A momentarily co-moving frame. ---------------------------------------------- Months ago, I was reading research papers on Ehrenfest Paradox, and I was seriously annoyed with it. Not...
  19. Phylosopher

    I Aberration of light in circular motion, what happens to distance?

    Let me clarify. Problem: Take a reference frame S, it represents the reference frame of a point source (say a star). In this reference frame, the distance between the orbiting object and the source is ##r##. Further, the object have a perfect circular orbit and so ##r## is constant and the...
  20. Phylosopher

    I Aberration of light in circular motion, what happens to distance?

    Simple as it sounds! Usually people derive aberration of light using linear motion, not circular motion. When aberration happens in linear motion, one would expect distance between the source and the observer to change. But, in circular motion, the path light takes in the circular motion, in...
  21. Phylosopher

    How does glue reinforce two sheets of paper joined together?

    Thanks. Maybe I wrote my questions in a the wrong way! I am interested in simulating the behavior of the sheets after applying the glue. Just knowing the rigidity won't do it for me I guess! Take this for example. Instead of a Beam, its a paper. What do I need to know to make such simulation...
  22. Phylosopher

    How does glue reinforce two sheets of paper joined together?

    I am no engineer, just a physicist. I usually do not work with such problems, so I basically do not know what to look for to begin with. My question/questions goes like this, take the following situation: Fetch a paper, such single paper is easy to bend. If one takes glue, and glue this...
  23. Phylosopher

    Classical Finished undergraduate electrodynamics: what next?

    Sorry to interrupt the thread. But this really caught my eyes! I thought it is still widely used. What other textbooks are used currently as a replacement to Jackson's?
  24. Phylosopher

    Can someone please explain to me how the Biot Savart law is derived?

    Historically, as far as I know, the Biot-savart law was not derived. It was empirically found from experimental data. If you want to derive it, use Maxwell's equations. But, keep in mind that Maxwell's equations are in fact shaped by multiple empirical results, one of them is Biot-savart law.
  25. Phylosopher

    Emission Wavelengths

    What is ##h##? what is ##c##? If you don not know, go to "photon energy" wiki page.
  26. Phylosopher

    A High-Energy biophysics?

    Well, there is something called particle therapy, where they use high energy particle beams to treat cancer. I you didn't hear of it before, it might be a good starting point. Psychology and biological systems like microorganisms, I have no idea. But I would like to know if you found any...
  27. Phylosopher

    B Why does parity give raise to pseudovectors?

    This is very interesting. It is the first time someone states to me this. In wiki, I found these two paragraphs: How can I then distinguish pseudovectors from vectors if they live in the same realm. Pardon my ignorance, but if ##\vec{v}=\{1,0,0\}## and ##\vec{u}=\{0,1,0\}## are vectors that...
  28. Phylosopher

    B Why does parity give raise to pseudovectors?

    Summary: Why parity have vectors and pseudovectors? why not only vectors? I am reading Griffiths "Introduction to elementary particle physics" Ed.1. The book obviously is an undergraduate introduction.Thus, not much detail is presented, but I cannot get my head around pseudovectors...
  29. Phylosopher

    Confusion about the Heaviside method

    This is not the point of your thread. The question you asked was about setting ##x## to the root values, and whether it is even a liable action. Thus, my answer was evolving around this, not about the method in which we solve the problem. Putting that aside, assuming my answer is mathematically...
  30. Phylosopher

    Confusion about the Heaviside method

    Nice approach, though it might not look like a limit has been used, it has been used for the numerator equation at the beginning. I find it hilarious that we cannot talk about a simple manipulation without introducing limits. I think the following is quite satisfying: The misleading part in...
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