I used S in the 80s, it was a Bell Labs language, just like A, B, and finally C. So didn't they get the name wrong? Shouldn't it be T or maybe even U by now?
I don't know who to blame - Broadcomm, Dell, or Microsoft, but Broadcomm chipsets (a.k.a. Dell 139x series) still can't do WPA2-Enterprise in Windows Vista. Intel? No problem.
I think I used Arfken for a two semester grad course. My Ph.D. is in geophysics, but this was a terrific book for any scientist expecting to utilize physics in their work.
I don't think Feynman is appropriate.
I can't believe that a Ph.D. student in math (a) has never taken a physics course, and (b) has not taken PDE and is already in 3rd year of program. In all Ph.D. programs that I'm familiar with, by 3rd year you're only taking courses that directly pertain to your specialty.
Gödel (yes, that guy: http://en.wikipedia.org/wiki/Kurt_G%C3%B6del) wrote a paper, I think it was in 1948, that posited a rotating universe. I don't think he meant the paper to represent a plausible universe, rather it was a toy universe, but nevertheless was compatible with General Realtivity.
I wrote a short paper that showed that the metric of the Gödel universe created helical world lines (in our universe the world lines (path of photons) are supposed to be simple curves, I believe either elliptical or hyperbolic, but I could be wrong). I was only an undergrad, I might've been totally wrong!
Been there, done that. Only difference is we didn't have GPS, only LORAN. You don't need GPS, you just need a sonar transponder whose location is well-known.
1977, aboard RV Melville (Scripps IO). We drop 3 sonobuoy transponders to the ocean floor in a large triangle (few kilometers per side). We know the approximate locations only, since they were after all dropped. Ship sails around doing research and pinging away; record round trip times to each transponder; invert large number of observations to solve for locations of each transponder relative to each other; within a day we know the relative locations accurate to within a few meters (maybe better, I don't recall); meanwhile ship is recording LORAN locations; the LORAN locations are cross-correlated with the relative transponder locations (which are more accurate); net result is that transponder coordinates now have a geographic reference (xy to lat-long).
Two issues with the GPS version: (1) you need to anchor to ocean bottom and have antenna at surface, therefore you need a lot of cable/wire; (2) the surface GPS (antenna) position is NOT the same as the transponder, since the cable is certainly not going to be perfectly vertical. Maybe you don't need to anchor it, just let it drift, then #1 doesn't matter.
Someone said this sounds eminently patentable. No, I don't think so!
Slashdot Mirror
I used S in the 80s, it was a Bell Labs language, just like A, B, and finally C. So didn't they get the name wrong? Shouldn't it be T or maybe even U by now?
I don't know who to blame - Broadcomm, Dell, or Microsoft, but Broadcomm chipsets (a.k.a. Dell 139x series) still can't do WPA2-Enterprise in Windows Vista. Intel? No problem.
I think I used Arfken for a two semester grad course. My Ph.D. is in geophysics, but this was a terrific book for any scientist expecting to utilize physics in their work. I don't think Feynman is appropriate. I can't believe that a Ph.D. student in math (a) has never taken a physics course, and (b) has not taken PDE and is already in 3rd year of program. In all Ph.D. programs that I'm familiar with, by 3rd year you're only taking courses that directly pertain to your specialty.
The magic of backquotes! Need to edit all text files with word "abc" in them? vi `grep -l abc *.txt`
Gödel (yes, that guy: http://en.wikipedia.org/wiki/Kurt_G%C3%B6del) wrote a paper, I think it was in 1948, that posited a rotating universe. I don't think he meant the paper to represent a plausible universe, rather it was a toy universe, but nevertheless was compatible with General Realtivity. I wrote a short paper that showed that the metric of the Gödel universe created helical world lines (in our universe the world lines (path of photons) are supposed to be simple curves, I believe either elliptical or hyperbolic, but I could be wrong). I was only an undergrad, I might've been totally wrong!
Yes! And hopefully a full suite of DRM software!
Been there, done that. Only difference is we didn't have GPS, only LORAN. You don't need GPS, you just need a sonar transponder whose location is well-known.
1977, aboard RV Melville (Scripps IO). We drop 3 sonobuoy transponders to the ocean floor in a large triangle (few kilometers per side). We know the approximate locations only, since they were after all dropped. Ship sails around doing research and pinging away; record round trip times to each transponder; invert large number of observations to solve for locations of each transponder relative to each other; within a day we know the relative locations accurate to within a few meters (maybe better, I don't recall); meanwhile ship is recording LORAN locations; the LORAN locations are cross-correlated with the relative transponder locations (which are more accurate); net result is that transponder coordinates now have a geographic reference (xy to lat-long).
Two issues with the GPS version: (1) you need to anchor to ocean bottom and have antenna at surface, therefore you need a lot of cable/wire; (2) the surface GPS (antenna) position is NOT the same as the transponder, since the cable is certainly not going to be perfectly vertical. Maybe you don't need to anchor it, just let it drift, then #1 doesn't matter.
Someone said this sounds eminently patentable. No, I don't think so!