Search results

  1. L

    Injecting an unflated balloon with vacuum

    A balloon that is initially deflated but still open to atmospheric, still contains air inside its cavity. Sucking that remaining air out would make the deflated balloon further collapse to a certain degree, but because the material of the balloon is not hermetic and is permeable, if you keep...
  2. L

    Programs PhD. at a company?

    I have seen this situation happen at my Phd institution but rarely, and so far only in engineering programs. Your thesis will diverge from the company-related research at some point as you get deeper and deeper into the academic side of your thesis research. So later on you may end up having to...
  3. L

    Mathematical and Materials Science

    I think your question is too about narrowing it down a bit such as what applications? clean energy, biotech, electronics, transportation...? what classes of materials? polymers, ceramics, semiconductors etc...? you could search through different universities' websites for their...
  4. L

    Engineering Help with choosing path after bachelor's degree in engineering

    I strongly feel that unless you plan to go into academia for a career, there is no 'practical' reason to get a PhD. The years and money you spend in a graduate program, can be just as fruitfully spent working in your industry of choice, gaining valuable industry-specific experience and building...
  5. L

    Schools Getting into physics grad school

    It could be that in the case of for example, USC - saying they accept 13 out of 190 but have 78 grad students - it's because the other 65 grad students were those who had been admitted in previous years who are still there working on their degrees. so the 13 out of 190 refers to new or incoming...
  6. L

    Thermodynamics of wire calculation's one possible way to simplify the analysis down to get an approximate equation: (lots of simplifying assumptions here) Assume a steady state condition, as you have said.. Also assume that the temperature is uniform throughout the wire. Start with the energy balance on the wire: energy...
  7. L

    Deflection at any point in fixed beam

    I think the easiest thing is to define the loading using singularity functions, set it equal to EIy'''' (where E = elastic mod, I = moment of inertia, y'''' = fourth derivative of deflection); then successively integrate to get the shear force, moment, and finally the deflection as a function...
  8. L

    Is this grounds for a lawsuit?

    there are reasons to not want your name to be on the author list even if you did contribute to the paper, and so you have the right to decide if you do want to be listed as an author or not. For example, it does happen that sometimes collaborators on a project disagree with the conclusions of...
  9. L

    Math Bad economy and funding in science and maths?

    The hit in science funding already began long ago with the Bush administration. It is widely reported that the new Obama administration will supposedly increase funding for science and that the funding will be shifted away from biological/life sciences back into physical sciences. This is...
  10. L

    PVC, PEC or ?

    The only PEC I know of which can be considered a plastic might be polyethylene carbonate however it does not sound like it will fit your application... maybe the manufacturer you are working with has something different in mind when they say PEC?
  11. L

    Schools What do grad schools like?

    Undergrad admissions are based on high school GPA and SAT/ACT scores and factor in extra curricular activities Grad admissions are based on your undergraduate GPA and GRE scores (especially math if you are going into sciences for graduate school), and may factor in relevant work experience or...
  12. L

    Stress Tensor with components
  13. L

    Thermodynamics of wire calculation

    you have a 1.9 mil diameter wire with 192 Amps flowing through it??
  14. L

    Material properties at cryogenic temperatures

    have you tried the CRC Handbook? otherwise you may have to do a literature search for individual papers that deal specifically with these measurements and for the particular materials you are interested in.
  15. L

    Is this grounds for a lawsuit?

    I must have missed something then because in your first post you were asking about suing the professor... and I wasn't talking about retracting the entire article, just your name from the author list. so I thought you were looking to do something concrete to remedy the situation, whatever...
  16. L

    Etching of SOI wafer

    the lowering of the etch rate could be due to a change in thermal conductivity since now the flim is on a different substrate and the oxide has a lower thermal conductivity. did your etch geometry change? etch rate also changes with geometry of exposed area due to the loading effect.
  17. L

    Is this grounds for a lawsuit?

    Cyrus there is no law I know of prohibiting a professor from putting your name on a publication. It is more of an ethics issue than a legal one. I would write to the journal editor and ask them to retract your name from the paper. I'm not sure what effect this will have. For example, entire...
  18. L

    How many people are happy with their jobs\life

    on the flip side, I think a lot of people secretly hate being stuck in the same boring place doing the same boring thing over and over again and would love to break out and be on the move like you, but are too afraid to go beyond their comfort zone. Or maybe are tied down whether with kids or...
  19. L

    How can I make physics part of my career

    I disagree somewhat.. at the national lab where I work, there are several career technicians who have been here 15, 20+ years and who are the foundation of their research groups. They have far more job security and career mobility than I (and many other postdoctoral researchers) do or could hope...
  20. L

    How can I make physics part of my career

    I think it depends on the individual lab you are applying to. Generally I *think* this is sufficient but any hands-on experience would help, such as an internship in industry. For example labs may give you a higher salary if you have previous technician experience like if you are coming from...
  21. L

    Electrically non-conductive thermally conductive material

    cost was not an issue for me (this was for basic research, not commercial application) so I admit I didn't pay attention to how much it cost; also I used it because for high vacuum we want minimal outgassing and AlN was sufficient for that criteria along with its electrical and thermal...
  22. L

    How can I make physics part of my career

    With a BS or MS in physics you can get a job as a technician or research assistant in a research lab (university lab, national lab, private research institute). Technicians and research assistants in research labs run the equipment and carry out experiments under the instruction of the PI...
  23. L

    Other Should I Become an Engineer?

    it depends entirely on your specialty and skills. You will probably not get an industry job that is exactly related to your phD topic, but you may get a job because of the skillset or tools you used to get your PhD . at the phd level there are relatively few jobs to begin with, regardless of...
  24. L

    Electrically non-conductive thermally conductive material

    I've used aluminum nitride as a thermally conductive electrical insulator in high vacuum applications
  25. L

    Etching of SOI wafer

    are you using RIE or DRIE (passivation steps)?
  26. L

    Financial problems after PhD?

    When you eventually do your PhD, you will be paid a stipend either as a research assistant and/or a teaching assistant (the latter requires teaching undergrad classes which is not fun but lots of students do it if their research funding runs out). You can also apply for fellowships. whether...
  27. L

    Programs Dont Do Phd In Phyiscs

    IMO, you will be happy getting a PhD if you truly love doing the research enough to endure the hardships of (1) the phd process (2) the postdoc process (3) the tenure process, and by tenure I don't just mean academia because even in most national labs nowadays getting a permanent position...
  28. L

    Programs Dont Do Phd In Phyiscs

    This is very true. Professors depend on grad students to do their research for them, and to churn out publications and data for new grant proposals to build their empires with. Of course they are going to encourage you, they don't want you to quit halfway because then who will do the work for...
  29. L

    Programs Dont Do Phd In Phyiscs

    No I got my phd in mechanical engineering but my thesis was more material science. Most of my grad school friends went straight into industry after their phds, but I wanted to continue in research so I went to a national lab and sorta switched fields. Several of my friends, and most of my...
  30. L

    Programs Dont Do Phd In Phyiscs

    It depends on your field. most of my colleagues who are physics postdocs in academia say no, the employment situation for physicists in general is not any better in fact it is far worse now. Just as it is for all PhDs in general. Faculty positions are scarce and highly competitive. Staff...