how do i explain 'dynamic compressoin' and 'displacement compression'?
963018
In simple terms, a displacement compressor squeezes the gas to increase it pressure. A dynamic compressor imparts extra velocity to the gas and then slows the gas down to convert this extra velocity to pressure. \n\nI as sure that the first three compressors mentioned in your question are displacement types. I believe the liquid ring is also but I am not completely sure.
963983
There are many ways to do this problem.  The best way to probably handle density, and perhaps mass even, is using Archimedes principle of buoyancy.  You can find a detailed discussion on www.wikipedia.com and search for Archimedes or buoyancy.  The main idea is that "the weight of the displaced fluid is directly proportional to the volume of the displaced fluid".  \n\ngood luck!
527930
=========\ncorruption \n\nIn general, a corrupted compressed file is lost. Compression works by removing redundancy which might have been used to recover most or all of a plain text file that is equally corrupted. Without the extra information, reconstruction is typically not possible.\n\n=========\nmultipart\n\nSome compression programs allow you to specify that the compressed file be no larger than <some size>, so for instance it can fit on a floppy. If the data, compressed, is larger, such compression programs will produce a 2 part or 3 part or 4 part compressed file. All the parts must be produced when decompressing or the file will be treated as corrupted. You'll have to find the missing parts if it's a multipart kind of file. \n\nIt sounds like this may have happened to you. \n\n=========\navoidance\n\nBecause files stored in compressed form are more subject to total loss than the originals, something of which may be partially recoverable, the ideal backup and compression strategy should probably be to compress each file independently of all others. And perhsp back them up separately as well, instead of as a concatenated superfile.\n\nAnd, of course, you should do what many people never do. Test your backup software to make sure it works, on single files, on directories, etc. Make sure it preserves file and directory ownership, permissions, filenames, ... If it works on 10 smapel files of various sizes in two or threee directories, than you can have some faith it will work on real live precious, perhaps irreplacable, data.\n\nAnd the same is true of a compression program. It too should \nsquash and recover files without any change whatsoever. \n\nYou might try the *nixen utility diff to check whether the original and recovered files are identical. It's much more efficient, less error prone, and far less tiring than doing it manually. If you're running Linux (or one of hte BSD vairants, including Mac OS X) you should already have it. If you're running Windows, you can install the Cygwin package (from Red Hat) or the Uwin package (from Bell Labs) to get that and many other *nix type utilities. Both are freely avaialble for download. Try Google for mirror sites.
802816
Compression is a reduction in volume of a constant mass in response to pressure. In a liquid or solid state, steel would be considered incompressible because the compressibility is infinetressimal.\n\nThe bulk modulus is the opposite of compressibility. The bulk modulus for (solid) steel is 16 x 10^11 Pascals. While a Pascal is a very small measure of pressure (atmospheric pressure on Earth is about 100,000 Pa), this number is still very large. You would have to be able to go 10,000 miles (2900 leagues) under the surface of the ocean to see 16 x 10^11 Pa of pressure.
694776
You can either use just a space, or if you need to force a space, use the ampersand nbsp semicolon (let's see if it works:  ) That's a "non breakable space" and doesn't get compressed.
410762
Winrar is good product to use!!\nThere is product u can compress from 2GB to 10mb...just like u said!!!\n\nIt's called "KGB Archiver".  This is one most superme compression i ever know..u can compress from GB to MB or maybe KB!!!\n\nHowever, it takes a lot of time to compress it\nFor example, if u have 2GB software, u want to compress into 2mb...it at least 30 hrs to do it....it depends on ur system...(the better system u have, the less time u will have to wait)\n\nThe KGB system will take 90% of ram to do it!!!\n\nif u have slower system, it might take u a month or even year to compresss from 2GB to 2MB!!!\n\nDonwload and Description here:\n\nhttp://kgbarchiver.sourceforge.net/
810555
You simply does not need to compress your drive unless you run out of space. compressing will reduce the speed of your PC.
1024834
compression and friction
82429
Compressive stress (or compression) is the stress state when the material tends to compact (volume decrease). A simple case of compression is the uniaxial compression induced by the action of opposite, pushing forces. Most materials can carry compressive stress, even the granules such as sands.\n\nTensile stress is a loading that tends to produce stretching on a material by the application of axially directed pulling forces. Materials can withstand some tensile loading, but if enough force is applied, they will eventually break into two parts. Steel is an example of a material with high tensile strength.\n\nShear stress is caused when a force is applied to produce a sliding failure of a material along a plane that is parallel to the direction of the applied force e.g. when cutting paper with scissors.
1168573
To answer the question properly, need to know more about the nature of the signal.\n\nWhat is the signal bandwidth (what is the fastest that the signal is changing?)\n\nWhat is the dynamic range of the signal? (What is the ratio of the are the maximum-to-minimum values expected)\n\nWhat amount (%) of error can you tolerate in each measurement?\n\nFlash conversion is very fast, but is power hungry and limited in its number of bits. I'd probably choose this one only if there were no other alternatives. Considering that seismic events are relatively slow with respect to the typical speeds of electronics, I might expect that a flash converter may not be necessary.\n\nThere are several very fast successive-approximation ADCs that could probably do the job. And they are cheap!\n\nSigma-delta converters are relatively slow, but have a very wide dynamic range. Useful for high precision across a wide range.\n\nCheck out www.analog.com. They make a lot of converters, you can probably find some application notes on the topic.
999288
well, others might have told you it is pressure, and actually even i would have gone for it!\nbut since you have mentioned in particular on a fluid, then this ratio can also be called as Bulk's modulus(though this applies even to solids)\nit can also be the coeff of viscosity taken velocity gradient times\nthere can be various other depictions also
527868
you can use WinRar, a good compressing program, you can download it from here
830076
you can't really "catch" them per se, as they are really not errors, unlike floating point overflows. \nYou can do some sanity checks like the above answer explained...\nor better, just use larger storage - like unsigned long long - that'll give you more space without overflowing.
779861
Ok, here's how i think you do it\n\ncar displacement = 66*t where t is the time in seconds\n\nbaloon displacement = 15*t + 200\n\nso according pitagoras\n\nc^2 = 4356*t^2 + (15*t+200)^2\n\noperating you get\n\nc^2 = 4581*t^2 + 6000*t + 40000\n\nnow, deriving dc/dt you get\n\nVc = 3*(1527*t+1000)/(4581*t^2+6000*t+40000)^(1/2)\n\nso now you just subtitute t\n\nVc = 33.7 ft/s\n\nI hope this helps.
1004646
This is a loaded question, isn't it. Anyhow, here are a few options:\n\nCompress them all into a .zip or .rar file (you can use WinZip or WinRar to do this -amongst other compression utilities, these are just the most popular). As stated above, you can send them over IM (if the IM supports it and depending on the size of the final compressed file).\n\nIf your IM doesn't support file transfer or if your file is too large and you really don't feel like sending more than one file (hence the 'all at once' portion of your question), your best bet would be to hop onto your favorite IRC channel and send it via DCC Transfer. (Do a little research on Google about IRC if you don't know about it).\n\nAnyhow, I hope I didn't just teach you how to pirate music and distribute it illegally. Oh well, good luck anyhow!
656021
The first answerer had the correct answers.  If the temperature of the box after compression is the same as when you started out, then you can use the ideal gas law (as the second answerer did) to show that if you halve the volume, the pressure will double.\n\nIn the case where you do not let the heat that's produced by compressing the gas escape from the box, then you need to use the equation of state for an adiabatic process:\n\nP*V^g = constant,\n\nwhere g is the ratio of the molar specific heat at constant pressure to the molar specific heat at constant volume.  For an ideal diatomic gas (a good approximation for air at these pressures and temperatures), this ratio is equal to 7/5.  In which case, \n\nP_final = P_init*(V_init/V_final)^(7/5).  \n\nIn the case at hand, \n\n V_init/V_final=2, 2^(7/5) = 2.639, \n\nso the final pressure is 2.639 times that of the initial pressure.\n\nThe temperature-volume relationship for an adiabatic process obeys a similar law:\n\nT*V^(g-1) = constant \n\nFor an ideal gas:\n\nT_final = T_init*(V_init/V_final)^(2/5)\n\nIf you compress air to half its original volume in a perfectly insulated container (no heat is allowed to escape) then the temperature will increase by a factor of 2^(2/5) = 1.32.  (Note that the temperature here refers to the absolute temperature expressed in Kelvins.)
57773
What kind of enhancement?  Just how much work do you expect us to do?  Also, I'm assuming DCT is equivalent to DFT and you're just asking what to do with the signal's spectrum.