If you can keep your head when all about you
Are losing theirs and blaming it on you;
If you can trust yourself when all men doubt you,
But make allowance for their doubting too;
If you can wait and not be tired by waiting,
Or, being lied about, don't deal in lies,
Or, being hated, don't give way to hating,
And yet don't look too good, nor talk too wise;
If you can dream - and not make dreams your master;
If you can think - and not make thoughts your aim;
If you can meet with triumph and disaster
And treat those two imposters just the same;
If you can bear to hear the truth you've spoken
Twisted by knaves to make a trap for fools,
Or watch the things you gave your life to broken,
And stoop and build 'em up with wornout tools;
If you can make one heap of all your winnings
And risk it on one turn of pitch-and-toss,
And lose, and start again at your beginnings
And never breath a word about your loss;
If you can force your heart and nerve and sinew
To serve your turn long after they are gone,
And so hold on when there is nothing in you
Except the Will which says to them: "Hold on";
If you can talk with crowds and keep your virtue,
Or walk with kings - nor lose the common touch;
If neither foes nor loving friends can hurt you;
If all men count with you, but none too much;
If you can fill the unforgiving minute
With sixty seconds' worth of distance run -
Yours is the Earth and everything that's in it,
And - which is more - you'll be a Man my son!
A worldwide exclusive agreement was signed by Fugro Survey for the Inertial Metrology technology GIPSEA and the associated software and support services from IPOZ LLC.
Utec Surveys is also now offering the Inertial Metrology service.
September 2011. "Cold Atom Accelerometers".
For the first time, a team of French physicists (CNRS, Institut d'Optique Graduate School, Observatoire de Paris, ONERA, UPMC, Université Paris-Sud and Université de Bordeaux), supported by CNES and ESA, has succeeded in developing a vibration-resistant cold atom accelerometer. Tested in parabolic flight, this prototype was able to measure infinitesimal accelerations, which until now was only possible in the laboratory. This could pave the way for the development of portable cold atom accelerometers and thus improved positioning and geological prospecting systems. It could also make it possible to directly test aspects of Einstein's general theory of relativity. The results are published in the journal Nature Communications.
August 2011. "How fast are you going?"
- Do you ever ask yourself how fast you are going (while sitting there in front of your computer)?
- So let's imagine you are stopped in your car at a red traffic light. Let's say your velocity is 0 on each axis (say, there are 3 axes in space).
- The light turns green and you put the gas pedal to the metal and maintain a constant acceleration for 1 second.
- After 1 second you are going 22 mph! (not bad eh?)
- Now wait, that means in 3 seconds you are already getting a speeding ticket (you are going 66 mph!)...
- So what was that acceleration? (you knew you would be tested)
- Well, keep it simple: it was 22mph/second... forget the conversion to SI units for now ...
- Now imagine you keep this acceleration going for more than 3 seconds! Before you know it you would go way too fast!
- How fast would you go after several billion years? (calculator anyone?)
- In old classic PHYSICS, that's what gravity is! (yes that gravity that keeps you in your seat in front of your computer): it is an acceleration of 9.8m/s every second.
- Every time I turn on an Inertial Navigation System I see that reading on my screen: even though the INS seems to be perfectly still, and all rotations are zeroish, and on 2 axes the accelerations are zeroish, on the axis pointing towards the center of the Earth I read: 9.8m/s/s! WOW !
- Imagine a rock on Earth that would have been submitted to gravity for 4.5 billion years! How fast is it going now? (where is that calculator when you need it).
- Oh and that good old Moon of ours why is it staying up there circling us for 4.5 billion years? Aren't objects in outer space supposed to be going in a straight line?
- in modern PHYSICS, things are a bit different (are you sitting comfortably?): all objects are "falling through space-time continuously"! (breath out...)
- The Moon is going in a straight line along a space-time path that just happens to go around the Earth. OK, explanation: it is like a beetle going straight on a beach ball and ending up at the same spot. It didn't turn right or left and just went straight, but ends up being back at Start point... In other words space-time is not flat. It is full of valleys and mountains and holes, and when you go straight through it (you "fall through it") you end up following paths that wouldn't look straight for an Isaac Newton, but are straight for the beetle...
- So in conclusion, what my vertical accelerometer is showing me is nothing special... just the local amount of curvature of the space-time continuum... OK, got to go, my alignment is finished, I am now navigating...