Simply keeping the rovers operational as long as possible is a useful endeavor. In doing that, you learn more about how the technology fails, what works reliably, and such. All of that can be used in designing the next probes to make them better.
Beyond that, there is always more science to be done, even if it's repeating the same studies on different rocks. Repeating experiments to verify results is an important task.
And there's always the exploration of driving to the next crater and seeing how different things are, especially considering the one crater may be millions of years older or newer than another.
Of course, what the administrators need is a well-written proposal of what the scientists want to do. They'll then panic publicly over not having the budget to get more money over Congress.
No, you still missed the point. Those four minutes are the phantom rotation caused by the revolution. That produces one day per year.
A leap year is because a revolution takes about 365.25 days. That makes a calendar with an integer number of days per year slip by about a day every four years, hence leap years. This is a separate effect.
Actually, if you had read any of the other five responses before posting yours, you would see that no, the leap year has nothing to do with it. Four minutes a day works out to about 24 hours per year. One revolution around the Sun produces the illusion of one rotation around the Earth's axis if you use the Sun as your reference.
The same thing happens on Mars, but because it's year is about twice as long, the effect is about two minutes a day. If you measure time relative to the position of the Sun, then a Martian day is 24 hours, 39 minutes, 35.24409 seconds.
This is another example of NASA doing the technical stuff right (rovers that can last much longer than the original project speicifications required), but bad budgeting. They pay huge amounts to build the rovers and rocket them to Mars, but then they have to negotiate whether they can fund continuing to use them once they're already there?
The real headline here is "NASA considers turning off working rovers because they project budget was exeeded."
For people who are building home theater PCs for things like MythTV, this is a major step forward. The last release that supported overscan (so that a TV image doesn't have black stripes on the sides) was many releases back (version 4363). This release not only supports Linux 2.6 with 4K stacks, but has overscan and interlace support, making it ideal for TV and HDTV display.
Just like an automotive recall, there's one part that's bad, and they ask you to bring it in to be replaced at their cost (parts and labor). I once had a recall on my car to replace the radiator cap. They mailed me the cap and said to take it to a dealer if I didn't want to swap it myself (apparently the original cap wouldn't release pressure if it overheated).
A recall doesn't mean they'll replace the whole thing, just the bad part. This is a recall.
So if the RIAA is giving away CDs instead of a cash payment, shouldn't the artists receive the royalties on those CDs as if they were sold at the stated value?
Of course, if they're excess inventory, the point is probably moot as the royalties wouldn't have covered the recording and promotional expenses yet, so it's not real money yet.
So if you had to give someone $500 worth of your stuff, wouldn't you pick a bunch of stuff you didn't want to begin with? (Well, assuming you don't care about the recipient.)
The Spooky Scary Sounds CD is awesome. Every Halloween, we set it up on a boom box in the bushes next to our front door on repeat. It's perfect for setting the mood along with our jack-o-lanterns.
Say what you want about her investing and cover up, but she did put out some great products.
Parallel and serial ports are nice to have, especially if you want to build some of your own hardware. And considering how insanely cheap a uart is, why not?
First, you will feel weightless if your spaceship is coasting, as any gravitational effect on you is going to be the same for the ship, so you will have no significant sense of gravity. You can only sense gravity if you have something pushing against you (air, the ground, etc.). You can sense the illusion of gravity if something is applying a similar force against you (accelerating spaceship, etc.)
Second, as you get farther away from Earth, the actual pull of gravity will reduce. At some point, the gravity of Earth will cease to be the dominant source of gravity, and the net gravitational force will be quite small. You still have to take it into account for navigation, though, as even a slight influence can cause a significant course change considering the distances. (You also have to take into account Mars' gravity and the Sun's gravity, and possibly that of other objects.)
Well, if you define free fall as zero resistance to the effects of gravity, then whether in deep space or orbit, it fits. On the other hand, if the definition of "fall" includes moving towards a large object, then my explanation is incomplete.
It's important to remember that going into space and being weightless are separate things. Weightlessness is the effect of free fall; not some magic thing that happens once you reach space. You're only weightless in orbit because orbit, by definition, means that you're in a continuous free fall. Since this flight won't go into orbit (or anywhere close to far enough from Earth to ignore it's gravity), the weightlessness effect is simply a result of the flight trajectory including free-fall on re-entry.
You should configure your SMTP server to relay all mail through the ISP's SMTP server. Then people will receive the mail from the ISP, not from you, and presumably they won't be blacklisting the official SMTP server for the ISP (or else you have a bigger problem).
If the block outgoing port 25, but not incoming, then it shouldn't mess up people who are running their own mail servers, provided they configure them to use the ISP's mail server as a relay. That's how the whole system was originally supposed to work in the pre-spam days, anyway.
On the other hand, there's no need to block incoming port 25 unless they're afraid of people running unsecured open relays. Fortunately, that's rarely the case, right? Or are the virus zombies really turned into raw open relays? I'm under the impression that they're controlled more directly, presumably through some different port.
This is much like what people do with MythTV (an opensource PVR project). You can have a spearate back-end system (where you record and store TV shows) from the front-end systems (hooked up to TVs). [Actually, you can have several of each, but that's another discussion.]
Anyway, if you don't have a HTPC (home theater pc), but you want that functionallity, this may be a good approach. If you find a review, pay attention to heat and noise reports--one of the big advantages of moving functionallity to a remote PC is that you also keep the noise out of your living room.
So what systems used the term "windows" in a generic sense refering to a computer graphical user interface prior to 1985?
The first release of X was in 1984. Macintosh was also released in 1984. It shouldn't be too hard to document that the term "windows" was used generically in those systems prior to 1985.
That's a lot cheaper than the plasma I was looking at (for a TV). In both cases, though, the engergy involved is much lower. Would someone care to comment on the actual physics here? Are those TVs and balls really based on matter that is in the plasma state?
I'm confused as to why you would care how strong the passwords your users select are. As long as you control the authentication system, you can prevent repeated guessing--the days of globally-readable encrypted password files are gone. If you get more than a small number of failed guesses on a given account or from a given address, you cut off access, at least for a time.
I have a 8-mile commute, and I bicycle when the weather and my schedule permits. For such low mileage, it just doesn't make sense to invest in gas-saving technology. I'll never spend enough on gas to cover the cost of a more efficient vehicle than a used economy car.
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So how soon will I be able to take a DNA sample from my dog and find out what combination of breeds she is?
Simply keeping the rovers operational as long as possible is a useful endeavor. In doing that, you learn more about how the technology fails, what works reliably, and such. All of that can be used in designing the next probes to make them better.
Beyond that, there is always more science to be done, even if it's repeating the same studies on different rocks. Repeating experiments to verify results is an important task.
And there's always the exploration of driving to the next crater and seeing how different things are, especially considering the one crater may be millions of years older or newer than another.
Of course, what the administrators need is a well-written proposal of what the scientists want to do. They'll then panic publicly over not having the budget to get more money over Congress.
No, you still missed the point. Those four minutes are the phantom rotation caused by the revolution. That produces one day per year.
A leap year is because a revolution takes about 365.25 days. That makes a calendar with an integer number of days per year slip by about a day every four years, hence leap years. This is a separate effect.
Actually, if you had read any of the other five responses before posting yours, you would see that no, the leap year has nothing to do with it. Four minutes a day works out to about 24 hours per year. One revolution around the Sun produces the illusion of one rotation around the Earth's axis if you use the Sun as your reference.
The same thing happens on Mars, but because it's year is about twice as long, the effect is about two minutes a day. If you measure time relative to the position of the Sun, then a Martian day is 24 hours, 39 minutes, 35.24409 seconds.
Mars Time FAQ
This is another example of NASA doing the technical stuff right (rovers that can last much longer than the original project speicifications required), but bad budgeting. They pay huge amounts to build the rovers and rocket them to Mars, but then they have to negotiate whether they can fund continuing to use them once they're already there?
The real headline here is "NASA considers turning off working rovers because they project budget was exeeded."
Can that be right? 23:56 for an Earth day? Where are the extra 4 minutes? That's two hours a month of slippage--that can't be right.
For people who are building home theater PCs for things like MythTV, this is a major step forward. The last release that supported overscan (so that a TV image doesn't have black stripes on the sides) was many releases back (version 4363). This release not only supports Linux 2.6 with 4K stacks, but has overscan and interlace support, making it ideal for TV and HDTV display.
Or even more like taking your zip code with you when you move.
Just like an automotive recall, there's one part that's bad, and they ask you to bring it in to be replaced at their cost (parts and labor). I once had a recall on my car to replace the radiator cap. They mailed me the cap and said to take it to a dealer if I didn't want to swap it myself (apparently the original cap wouldn't release pressure if it overheated).
A recall doesn't mean they'll replace the whole thing, just the bad part. This is a recall.
So if the RIAA is giving away CDs instead of a cash payment, shouldn't the artists receive the royalties on those CDs as if they were sold at the stated value?
Of course, if they're excess inventory, the point is probably moot as the royalties wouldn't have covered the recording and promotional expenses yet, so it's not real money yet.
So if you had to give someone $500 worth of your stuff, wouldn't you pick a bunch of stuff you didn't want to begin with? (Well, assuming you don't care about the recipient.)
The Spooky Scary Sounds CD is awesome. Every Halloween, we set it up on a boom box in the bushes next to our front door on repeat. It's perfect for setting the mood along with our jack-o-lanterns.
Say what you want about her investing and cover up, but she did put out some great products.
Parallel and serial ports are nice to have, especially if you want to build some of your own hardware. And considering how insanely cheap a uart is, why not?
Two answers:
First, you will feel weightless if your spaceship is coasting, as any gravitational effect on you is going to be the same for the ship, so you will have no significant sense of gravity. You can only sense gravity if you have something pushing against you (air, the ground, etc.). You can sense the illusion of gravity if something is applying a similar force against you (accelerating spaceship, etc.)
Second, as you get farther away from Earth, the actual pull of gravity will reduce. At some point, the gravity of Earth will cease to be the dominant source of gravity, and the net gravitational force will be quite small. You still have to take it into account for navigation, though, as even a slight influence can cause a significant course change considering the distances. (You also have to take into account Mars' gravity and the Sun's gravity, and possibly that of other objects.)
Well, if you define free fall as zero resistance to the effects of gravity, then whether in deep space or orbit, it fits. On the other hand, if the definition of "fall" includes moving towards a large object, then my explanation is incomplete.
It's important to remember that going into space and being weightless are separate things. Weightlessness is the effect of free fall; not some magic thing that happens once you reach space. You're only weightless in orbit because orbit, by definition, means that you're in a continuous free fall. Since this flight won't go into orbit (or anywhere close to far enough from Earth to ignore it's gravity), the weightlessness effect is simply a result of the flight trajectory including free-fall on re-entry.
You should configure your SMTP server to relay all mail through the ISP's SMTP server. Then people will receive the mail from the ISP, not from you, and presumably they won't be blacklisting the official SMTP server for the ISP (or else you have a bigger problem).
Really? How do you send email if they're you ISP then?
If the block outgoing port 25, but not incoming, then it shouldn't mess up people who are running their own mail servers, provided they configure them to use the ISP's mail server as a relay. That's how the whole system was originally supposed to work in the pre-spam days, anyway.
On the other hand, there's no need to block incoming port 25 unless they're afraid of people running unsecured open relays. Fortunately, that's rarely the case, right? Or are the virus zombies really turned into raw open relays? I'm under the impression that they're controlled more directly, presumably through some different port.
This is much like what people do with MythTV (an opensource PVR project). You can have a spearate back-end system (where you record and store TV shows) from the front-end systems (hooked up to TVs). [Actually, you can have several of each, but that's another discussion.]
Anyway, if you don't have a HTPC (home theater pc), but you want that functionallity, this may be a good approach. If you find a review, pay attention to heat and noise reports--one of the big advantages of moving functionallity to a remote PC is that you also keep the noise out of your living room.
So what systems used the term "windows" in a generic sense refering to a computer graphical user interface prior to 1985?
The first release of X was in 1984. Macintosh was also released in 1984. It shouldn't be too hard to document that the term "windows" was used generically in those systems prior to 1985.
Other examples?
That's a lot cheaper than the plasma I was looking at (for a TV). In both cases, though, the engergy involved is much lower. Would someone care to comment on the actual physics here? Are those TVs and balls really based on matter that is in the plasma state?
I'm confused as to why you would care how strong the passwords your users select are. As long as you control the authentication system, you can prevent repeated guessing--the days of globally-readable encrypted password files are gone. If you get more than a small number of failed guesses on a given account or from a given address, you cut off access, at least for a time.
The key is to detect the attack.
THX-1138 is a artsy 2001-ish film based on a plot vaguely along the lines of "Logan's Run."
It does have some interesting ideas, and there are effects that remind you of Star Wars (some of the vocal effects).
I have to agree here.
I have a 8-mile commute, and I bicycle when the weather and my schedule permits. For such low mileage, it just doesn't make sense to invest in gas-saving technology. I'll never spend enough on gas to cover the cost of a more efficient vehicle than a used economy car.