That's only cheaper if your time costs nothing. And digital information is much more accessible than paper or microfilm: doing a search on a collection of digital documents will give you better results, much faster than browsing those documents on paper. In your example, the sports writer would have to spend a week hunched over a microfilm reader, or 10 minutes in his search engine of choice.
Uh, no they haven't. Pretty much every diesel locomotive uses the diesel to drive a generator, which in turn drives the electric motors. There's no link between the diesel and the wheels. This is done to avoid putting in a clutch and gearbox (imagine trying to pull away cleanly with a clutch and that much weight).
The Golf is a 'parallel hybrid' where both the engine and the electric motor can drive the wheels, depending on demand.
In previous/. discussions of hybrid cars, I've seen claims that diesel hybrids were unlikely since the hybrid system wouldn't bring much of an advantage to a diesel car, because diesels scale their fuel consumption at low engine output (partial or no load) better than petrol cars. All you'd need would be a start/stop system. I'm looking forward to a proper test of this car against its rivals (including e.g. a BMW diesel with their 'efficient dynamics' package).
...then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then l...
* How the energy is stored (or storage losses). This is one of the big issues with hydrogen. It tends to seep through containers. Compressed air would be a similar problem. A leak in your compressed air tank has an environmental effect just as a lead in your gas tank, and is harder to detect. It's more efficent to store a liquid than a compressed gas.
* The efficiency of converting the stored energy into motion of the vehicle. What are the thermal losses for state changes? Friction in the engine? Storage loss is a problem with hydrogen, not so much with compressed air. The 'environmental effect' is the loss of some energy, no local pollution as with a gas leak.
Efficiency: I can think of two major gains relative to an ICE: 1. Shutting the engine off when idling is simpler than with an ICE. Also, the engine can probably deliver torque at 0 rpm, so no clutch slip when driving away from a standstill. 2. thermal losses at low speed are lower because there's no combustion.
1. You just have an expensive heavy onboard compressor that you have to figure out how to recycle when it is dead The onboard compressor is just a hunk of metal which is easily recycled. The (composite) tank might be a bit more complicated.
I mean, gas stations already have air compressors for your tires, but would that put out enough pressure to fill the tank in your car? No, they fall short by 2 orders of magnitude. Suitable compressors aren't too expensive, though. this one delivers 80 l/min at 300 bar (so filling the tank takes a little over 4 min), draws 2.2 kW and costs UKP 1600.
For which value of "able"? The ASM-135 project had one successful test against a satellite, but was cancelled in 1988 before it became operational. At that point, at most 10 missiles remained. Quoting from fas.org:
In 1988, the Reagan Administration canceled the ASM-135 program because of technical problems, testing delays, and significant cost growth. which suggests the ASM program was far from operational.
Exactly. Everybody's focusing on the 'shooting down a satellite' part, but what we're seeing is a fairly realistic test of a ballistic missile defence system.
They're just following the Book of Weapons:
'First shalt thou take out the Holy Pin. Then, shalt thou count to three. No more. No less. Three shalt be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, nor either count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then, lobbest thou thy Holy Hand Grenade of Antioch towards thy foe, who, being naughty in My sight, shall snuff it.'
Um, try reading before you respond. I never said anything about assigning blame. Whoever's fault it is, the US national debt has become a problem that influences their foreign politics, instead of just being a financial burden.
Unfortunately, even the "more intelligent" have good reason to worry about China. China owns most of the US national debt, they have become a major competitor for natural resources, and they're investing massively in their military, including a large-scale cyberwar program. Most of the recent espionage stories were about agents working for China.
Last I checked submarines had air tanks for buoyancy control
The air tanks are used mainly used to switch between surface and submerged modes, for trimming (keeping the sub horizontal), and to compensate for changes in water density. Because the amount of lift generated by a body does not change much with its depth, the air tanks cannot provide fine control of your diving depth. Also, a naval sub prefers not to use the air tanks once submerged, because venting air leaves a trail on the surface. For fine depth control, a sub uses its diveplanes: wing-like surfaces that provide lift (positive or negative) as long as the sub keeps its speed above a minimum.
In effect, this glider reverses the process: changes in buoyancy are used to generate an upwards/downwards force, which is converted by the wings into forward motion.
newer subs are not motorized, but nuclear-powered.
You mean some newer subs are nuclear-powered. Conventional-powered submarines are still being built today. Often, in addition to the traditional diesel engines, an air-independent propulsion system is installed, either a Stirling engine or a set of fuel cells.
Why call it shortsighted? In 1949, recording technology was neither mature nor inexpensive. TV and radio had nothing like the budget they enjoy today, so there often simply was no money to archive broadcasts. Hell, the BBC (not what you'd consider an insignificant or poorly-funded organization) was plagued by this well into the '60s.
Already there, albeit not in pill form. It's called the "Don't eat more than you need, dumbass" diet and is available free of charge anywhere in the world. Also, I'd say a diet pill is one of the hardest problems on the list, along with AI and cheating death. You'd have to find a way to cheat on the laws of thermodynamics.
According to an acquaintance who works for an ISP, the weird thing isn't that these cables are broken, it's that all of a sudden it's news. There are always issues with submarine systems. That is why we have so many repair ships in the global fleet:
So the controller will weigh.75 kg, will take 6 minutes to spin up the gyros before it can be used, and needs a 12V lead to supply the motors? Progress, indeed...
That wouldn't exactly go unnoticed. Laying an undersea cable is a major operation, and can't be done from a submarine. It would also leave incontrovertible proof that the cable is being tapped, and who's doing the tapping.
Slashdot Mirror
That's only cheaper if your time costs nothing. And digital information is much more accessible than paper or microfilm: doing a search on a collection of digital documents will give you better results, much faster than browsing those documents on paper. In your example, the sports writer would have to spend a week hunched over a microfilm reader, or 10 minutes in his search engine of choice.
Uh, no they haven't. Pretty much every diesel locomotive uses the diesel to drive a generator, which in turn drives the electric motors. There's no link between the diesel and the wheels. This is done to avoid putting in a clutch and gearbox (imagine trying to pull away cleanly with a clutch and that much weight).
The Golf is a 'parallel hybrid' where both the engine and the electric motor can drive the wheels, depending on demand.
Well, to be fair, there was no mention of "war was beginning", so we're probably safe.
In previous /. discussions of hybrid cars, I've seen claims that diesel hybrids were unlikely since the hybrid system wouldn't bring much of an advantage to a diesel car, because diesels scale their fuel consumption at low engine output (partial or no load) better than petrol cars. All you'd need would be a start/stop system. I'm looking forward to a proper test of this car against its rivals (including e.g. a BMW diesel with their 'efficient dynamics' package).
...then shalt thou count to three, no more, no less. Three shall be the number thou shalt count, and the number of the counting shall be three. Four shalt thou not count, neither count thou two, excepting that thou then proceed to three. Five is right out. Once the number three, being the third number, be reached, then l...* The efficiency of converting the stored energy into motion of the vehicle. What are the thermal losses for state changes? Friction in the engine? Storage loss is a problem with hydrogen, not so much with compressed air. The 'environmental effect' is the loss of some energy, no local pollution as with a gas leak.
Efficiency: I can think of two major gains relative to an ICE:
1. Shutting the engine off when idling is simpler than with an ICE. Also, the engine can probably deliver torque at 0 rpm, so no clutch slip when driving away from a standstill.
2. thermal losses at low speed are lower because there's no combustion.
Of course this only works as long as moonrock is exceedingly rare. Once you start bringing tons of the stuff to Earth, prices will plummet.
Exactly. Everybody's focusing on the 'shooting down a satellite' part, but what we're seeing is a fairly realistic test of a ballistic missile defence system.
ie. retrieving satellites from orbit?
Um, try reading before you respond. I never said anything about assigning blame. Whoever's fault it is, the US national debt has become a problem that influences their foreign politics, instead of just being a financial burden.
Unfortunately, even the "more intelligent" have good reason to worry about China. China owns most of the US national debt, they have become a major competitor for natural resources, and they're investing massively in their military, including a large-scale cyberwar program. Most of the recent espionage stories were about agents working for China.
Last I checked submarines had air tanks for buoyancy control
The air tanks are used mainly used to switch between surface and submerged modes, for trimming (keeping the sub horizontal), and to compensate for changes in water density. Because the amount of lift generated by a body does not change much with its depth, the air tanks cannot provide fine control of your diving depth. Also, a naval sub prefers not to use the air tanks once submerged, because venting air leaves a trail on the surface.
For fine depth control, a sub uses its diveplanes: wing-like surfaces that provide lift (positive or negative) as long as the sub keeps its speed above a minimum.
In effect, this glider reverses the process: changes in buoyancy are used to generate an upwards/downwards force, which is converted by the wings into forward motion.
newer subs are not motorized, but nuclear-powered.
You mean some newer subs are nuclear-powered. Conventional-powered submarines are still being built today. Often, in addition to the traditional diesel engines, an air-independent propulsion system is installed, either a Stirling engine or a set of fuel cells.
Call it short sighted
Why call it shortsighted? In 1949, recording technology was neither mature nor inexpensive. TV and radio had nothing like the budget they enjoy today, so there often simply was no money to archive broadcasts. Hell, the BBC (not what you'd consider an insignificant or poorly-funded organization) was plagued by this well into the '60s.
Also, run-flat tires of various designs (e.g. Michelin PAX) have been on the market for years now.
* Safe, Effective Diet Pill
Already there, albeit not in pill form. It's called the "Don't eat more than you need, dumbass" diet and is available free of charge anywhere in the world.
Also, I'd say a diet pill is one of the hardest problems on the list, along with AI and cheating death. You'd have to find a way to cheat on the laws of thermodynamics.
Seven Degrees of Kim Jong Il?
According to an acquaintance who works for an ISP, the weird thing isn't that these cables are broken, it's that all of a sudden it's news. There are always issues with submarine systems. That is why we have so many repair ships in the global fleet:
list of ships
So the controller will weigh .75 kg, will take 6 minutes to spin up the gyros before it can be used, and needs a 12V lead to supply the motors? Progress, indeed...
That wouldn't exactly go unnoticed. Laying an undersea cable is a major operation, and can't be done from a submarine. It would also leave incontrovertible proof that the cable is being tapped, and who's doing the tapping.