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Comment I wonder how much the water in the air factors in (Score 3, Interesting) 133

Having lived in very dry places. (It frequently gets below 5% humidity in the summer outdoors) I know that with low humidity you can dry out fairly quickly. In Phoenix you are allowed to carry water into most sporting events because you need to replace the water that evaporates and everyone does it in the summer.

When you are in someplace that is humid, you do not dry out as quickly because the water is being replaced by water in the air (yet I know there are other factors),

It would be interesting to strictly control the isotope content in diet/drink for a month but in two different regions and then do a comparison.

Comment Why do they think it will stay up so long? (Score 1, Insightful) 282

Any course correction fuel will quickly (relatively) be used up. Geosynchronous satellites have course correction systems to keep them in the proper orbits.

Yes air resistance is minor at that distance from earth but they have not solved the three body problem. Tidal forces from the moon will eventually disturb the orbits and that will be the end of it. If this was not the case, we would have tiny natural moons around the earth.

Now if they put the disk in one of the L points they might have a chance.

PS: from an orbital mechanics point of view, geosynchronous orbits are not special. They just happen to take the same amount of time as a rotation of the earth. When the length of the day changes over the time frame mentioned, the orbits will no longer be geosynchronous. A billion years is long enough for the moon to change the rotation speed of the earth.

Comment Re:Wipe and reinstall. (Score 1) 320

Generally XP* and older versions of windows did not rewrite the boot sector. People would install linux on a machine and then try to go back to windows and LILO would still come up. There are ways to force it to do so of course.

Ideally operating systems would ask so you could re-install a partition and not have to mess with getting everything setup.

*for Vista and Windows 7 I think you may have to as well I have not had the issue of lately

Comment Re:Checkmate. (Score 0) 374

Many reasons:

They forced countries after WWII to become Soviet states. When countries previously tried to do what East Germany did successfully at the end of the cold war, The USSR drove in with tanks if necessary and reestablished communism.

They wanted to ban all religions. The idea that Pussy Riot is in trouble in large part for doing things in the government's pet church is so unexpected if you understand the USSR

They were a threat to people of wealth. Look at why Cuba became such a sore spot for the USA

They proclaimed that the whole world would be communist by the time the baby boomers had grandchildren

They had the power to seriously damage the world and they claimed to have much more power, hardware and people than they did

Oh, being the best driver of weapon sales and development did not hurt either

Comment Re:air resistance (Score 1) 192

No the velocity relative to the ground is quite high.

Think of the following experiment:

Take a object like a yo-yo at the end of a string and hold the other end of the string in one hand
Standing in one place spin in a circle as fast as you can
The yo-yo will start to move away from you in a bigger circle. It will "look" like it is not moving and the world is going round.
It is obvious that it is moving fast however and if someone walks up to you they will be hit by it.

If you jumped off a geosynchronous satellite, you would float near the satellite and gradually move away from it. It would be years before air resistance and tidal effects brought you out of orbit.

A geosynchronous satellite is one where the orbital period in terms of angular velocity happens to be equal to about the same as the rotational velocity of the earth. There are small thrusters on these to correct for tidal and other factors.

The timing of these orbits is basically a coincidence that we strive for and maintain for our own purposes. If the earth were to suddenly slow down (or speed up) these satellites would not be effected by the change. They would stay in the same orbits until someone on earth ordered the thrusters to compensate for the drift.

Comment consider shuting everything down right away as wel (Score 1) 331

unless you have offsite replication you may be better off telling people to stop working than have them work till the last momrent and then shutdown.

If you do nightly backups and some people do crital stuff this morning you can loose that work or restore to an inconsstant state. for some information it may be better to be down then inconsustant.

you dont want customers to have reciepts for transactions you do not have backups on your end.

Comment Re:So, they returned a server (Score 5, Insightful) 267

Not sure the details in this case but I would not want to have a server returned without notice and plugged in.

so imagine you are an admin, Server "yoyo" is gone so you set up a replacement server using a backup. We call the new server "yoyo" as well. you tweek it as needed and life is good.

A few days later both servers are now online. Both called "yoyo" One is out of date perhaps but they both have the same name. try to serve the same requests perhaps. Do backups to the same network location

The possiblities for excitement and fun are limitless.

Comment Re:Market Analysis (Score 2) 352

The only thing Amazon should be scanning and OCRing for ebooks in the modern age are older books. Everything else SHOULD come in electronicly. Publisher are frequently in the stone ages however.

If you self publish on the kindle you can download an application that shows you the final result before you publish. You can fix things to make them work.

Authors should get a chance to see review copies of books before epublishing . Of course that does not frequently happen. I know of a situation where a paper book went to final press without author review and the name of the author was typoed on the spine.

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