Re:Detailed landing timeline and get your camera o
on
Space Shuttle Heading Home
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· Score: 4, Informative
If you look at the maps you'll see they're not passing over the western US this time. Here's wishing them the best, even if not may people can see what's happening until the final stages.
I didn't mean to imply that the sail is for steering, but rather that it would throw off steering if attached as shown. I've been up in gliders a few times, and one of the issues with getting a tow is that the glider is designed to generate lift more efficiently than the tow plane. It wants to take off sooner and climb at a higher rate. The glider pilot getting the tow has to force his aircraft to a lower position, because otherwise the tow line will drag the tail of the tow plane up, putting it into a nose dive. For much the same reason, some ski boats have the ski rope attached to an overhead bar near the center of the boat to improve handling. The idea is to reduce the lever arm for forces that would negatively impact steering. As others have already pointed out, having to add constant corrections to avoid having the bow of the boat (or stern, for ski boats and tow planes) dragged out of line increases drag. Also, with the massive tankers and cargo carriers you can build up a fair amount of angular momentum before you realize it, requiring substantial corrections.
The artist's conception picture in the article shows the bow as the point of attachment for the parasail. I suspect that would make steering much more difficult, compared to hooking the parawing near the center of mass for the ship.
Why not go into space for some positive reason? like to learn or solve a problem like over population...
Overpopulation won't be solved by emigration. Humans have historically reproduced at rates far in excess of emigration rates, and I see no reason to think that that will change, particularly given the number of resources required per capita to put people into space.
I'm all in favor of space exploration, but it's not a solution to population pressure.
A common theme in half of these is that a small change was made at the last minute.
I was thinking the same thing. My wife saw the Vasa (it's been raised) in Stockholm last year, and according to the museum the king was micromanaging the project and made many last minute changes, including adding more guns by cutting gunports through the hull on a deck just above the waterline. It was those last minute additions that caused it to ship water and sink on the maiden voyage.
McCullough and Wilson wrote a paper about Office back in 1997 which ripped Excel to shreds on its statistical accuracy and random number generation. They reissued the paper in 2002, and Excel still had the same problems in Office2000 and OfficeXP. Many of the worst problems were still there in Office2003. Have they actually fixed the horrible errors?
Reminds me of the story about the museum curator who was leaning on the second floor railing looking down at the T-Rex display, one of his personal favorites. A small family group were in front of the display, looking up in awe, and the kid asked his parents how old it was. The janitor, who had been listening nearby, sauntered over and said "I happen to know that that there skeleton is sixty five million and thirteen years old." The curator cracked up as the janitor continued, "Yup, I been workin' here thirteen years now and the curator himself told me on the day I started that it was sixty five million years old."
She specifically talked about foam vs. ice. She said that going into it, they all assumed that ice would be the greater threat because of hardness and mass, but after running lots of simulations (it was a simulation conference where I met her) they discovered that foam's propensity to rapidly decelerate made it a much greater threat in terms of KE once the shuttle picked up speed but was still in the atmosphere.
No, but it looks like you missed the term relative velocity. If the shuttle is going 500 mph and you simultaneously release a pound of feathers and a pound of lead, which one will be travelling at a speed closer to that of the shuttle half a second later when it hits the wing edge? Hint - you're still in the atmosphere.
ice hitting something at 500 mph is a lot worse than foam.
You'd think that ice would be more dangerous than foam, but you'd be wrong. I had the pleasure of chatting last December with one of the astronauts who was doing the accident review. According to her the danger is more from relative velocity differences than from mass, since kinetic energy goes up quadratically with velocity and only linearly with mass. The problem with the foam is that it has such a low density that it decelerates very rapidly from aerodynamic drag after breaking loose. Ice, because of its much greater density, retains it's velocity and hits surfaces below at a much lower relative velocity. Given a choice between being hit by a chunk of ice at a few tens of mph, and a chunk of foam with the a tenth of the mass at hundreds of mph, you're better off with the ice.
MS just work it into the price of the OS, so the consumer ends up paying for it anyway. So it basically turns into a consumer tax on copies of Windows.
That's a common misconception, but economics says otherwise. Price and quantity are determined by the intersection of the supply and demand curves. At a higher price point, there's generally less demand to the point that MS loses money relative to what they make if they eat some of the price increase. Microeconomics says that the new equilibrium will distribute the "tax" between the producer and the consumers, with the proportion payed by each determined by elasticities of supply and demand. The nice thing about making MS open their standards (such as Samba) is that it gives consumers greater choice, which changes elasticity favorably for us consumers. Check any text on micro-econ if you don't believe me.
What makes you think that a Faraday cage needs to be grounded? Your automobile sits on rubber tires but still acts as a Faraday cage to protect passengers against lightning, as the linked article points out.
Turn the passenger compartment into a Faraday cage. Then the phones won't interfere with anything in the nose of the aircraft, people who ignore the rules will get squat, and I won't be asked to shut down my iPod for takeoff and landing.
Hell, even if your zip code IS 5 digits long you probably won't receive the prize.
Why do you pre-judge that this is a US-Centric contest, given the list of countries you provided? Apple doesn't care who the winner is, they anticipate that people will buy more stuff(tm) in an attempt to become the winner.
Etymotics aren't noise cancelling, they are noise isolating - they physically seal your ear off from the ambient noise. Noise cancelling headphones, on the other hand, have a little pickup microphone for the outside noise, and circuitry to invert the waveform and inject it into the headphone signal. The inverted waveform and original noise waveform cancel each other inside the earpiece, leaving the music much more audible at lower volumes. Since the inverting circuitry works best against steady-state drones such as jet engines, refrigerators, computer hum, etc., the earlier post is correct that it may make it possible to hear things like raps on the cubicle or conversations.
Not sure why the parent was modded "funny", they have a good point. If somebody is delusional they believe their own claims. Imagine, for example, if this woman was given an MRI.
There's nothing wrong with talking about your opinions in a university class where everyone is assumed to be a rational adult.
Depends on the circumstances. When I teach statistics I have no business injecting my opinions about the latest foibles of the administration into the dialogue, unless they illustrate a point related to the course. I do, for example, talk about Limbaugh's misrepresentation of the Democratic/Republican voting records for the 1964 civil rights act - it's an almost perfect example of Simpson's Paradox, in which collapsing categories incorrectly will lead to an apparent reversal of cause and effect. When you take into account who was from ex-Confederate states, the Demos voted in favor of the bill in higher proportions than did the Republicans in both regions. If you ignore the North/South effect it looks like the Republicans more strongly favored the bill, because prior to that vote there were very few Republicans in southern states. Another example I talk about is a law suit about gender bias in Berkeley admissions. Within different departments women and men were accepted at equivalent rates but when you collapse to an overall figure it looks like women are being rejected at a higher rate because they apply more frequently to departments with higher rejection rates. Berkeley used Simpson's paradox successfully to prove in court that their admissions weren't biased.
Most students take both examples as illustrating a statistical point. However, each year I get a few students who foam at the mouth when presented with one or the other of the examples. Interestingly (to me), the students who get bent out of shape when told about one of the cases always love hearing about the other one.
All of us are subject to perception bias - when you're sitting on the right side of the theater, everything on the screen looks tilted left to you, and vice versa. The same principle applies to political views. Most people aren't so extreme that they can't accomodate some variance in views, but there's always going to be a group who don't like to hear anything that contradicts their preconceptions, and if you tell them concepts they don't want to hear they view it as proof that you are unfairly biased. As an extreme example, I had one student tell me flat out that he would rather toss out all of the math we had worked through than believe statistics "if statistics claimed that Democrats had gotten it right and Republicans had gotten it wrong 40 years ago."
1) I don't think most people have a valid mental map of what the pieces are, let alone how they fit together. At least once a month I find myself repeating to my dad "No, Internet Explorer is not the web. No, e-mail is not the web." The man is not an idiot, quite the opposite - he has over 50 patents to his name. However, he's 80 years old and never used computers before retirement.
2) I'd like people to understand the difference between supply-push and demand-pull in communications. Don't e-mail a copy of your 20M Powerpoint to everybody in the department, put a link to a copy on your personal web page and e-mail the link.
Slashdot Mirror
If you look at the maps you'll see they're not passing over the western US this time. Here's wishing them the best, even if not may people can see what's happening until the final stages.
I didn't mean to imply that the sail is for steering, but rather that it would throw off steering if attached as shown. I've been up in gliders a few times, and one of the issues with getting a tow is that the glider is designed to generate lift more efficiently than the tow plane. It wants to take off sooner and climb at a higher rate. The glider pilot getting the tow has to force his aircraft to a lower position, because otherwise the tow line will drag the tail of the tow plane up, putting it into a nose dive. For much the same reason, some ski boats have the ski rope attached to an overhead bar near the center of the boat to improve handling. The idea is to reduce the lever arm for forces that would negatively impact steering. As others have already pointed out, having to add constant corrections to avoid having the bow of the boat (or stern, for ski boats and tow planes) dragged out of line increases drag. Also, with the massive tankers and cargo carriers you can build up a fair amount of angular momentum before you realize it, requiring substantial corrections.
The artist's conception picture in the article shows the bow as the point of attachment for the parasail. I suspect that would make steering much more difficult, compared to hooking the parawing near the center of mass for the ship.
Only for P = 0 or N = 1.
McCullough and Wilson wrote a paper about Office back in 1997 which ripped Excel to shreds on its statistical accuracy and random number generation. They reissued the paper in 2002, and Excel still had the same problems in Office2000 and OfficeXP. Many of the worst problems were still there in Office2003. Have they actually fixed the horrible errors?
Courtesy of Mr. Rogers (in a blood-stained sweater).
Reminds me of the story about the museum curator who was leaning on the second floor railing looking down at the T-Rex display, one of his personal favorites. A small family group were in front of the display, looking up in awe, and the kid asked his parents how old it was. The janitor, who had been listening nearby, sauntered over and said "I happen to know that that there skeleton is sixty five million and thirteen years old." The curator cracked up as the janitor continued, "Yup, I been workin' here thirteen years now and the curator himself told me on the day I started that it was sixty five million years old."
She specifically talked about foam vs. ice. She said that going into it, they all assumed that ice would be the greater threat because of hardness and mass, but after running lots of simulations (it was a simulation conference where I met her) they discovered that foam's propensity to rapidly decelerate made it a much greater threat in terms of KE once the shuttle picked up speed but was still in the atmosphere.
No, but it looks like you missed the term relative velocity. If the shuttle is going 500 mph and you simultaneously release a pound of feathers and a pound of lead, which one will be travelling at a speed closer to that of the shuttle half a second later when it hits the wing edge? Hint - you're still in the atmosphere.
What makes you think that a Faraday cage needs to be grounded? Your automobile sits on rubber tires but still acts as a Faraday cage to protect passengers against lightning, as the linked article points out.
Turn the passenger compartment into a Faraday cage. Then the phones won't interfere with anything in the nose of the aircraft, people who ignore the rules will get squat, and I won't be asked to shut down my iPod for takeoff and landing.
Hell, even if your zip code IS 5 digits long you probably won't receive the prize. Why do you pre-judge that this is a US-Centric contest, given the list of countries you provided? Apple doesn't care who the winner is, they anticipate that people will buy more stuff(tm) in an attempt to become the winner.
Etymotics aren't noise cancelling, they are noise isolating - they physically seal your ear off from the ambient noise. Noise cancelling headphones, on the other hand, have a little pickup microphone for the outside noise, and circuitry to invert the waveform and inject it into the headphone signal. The inverted waveform and original noise waveform cancel each other inside the earpiece, leaving the music much more audible at lower volumes. Since the inverting circuitry works best against steady-state drones such as jet engines, refrigerators, computer hum, etc., the earlier post is correct that it may make it possible to hear things like raps on the cubicle or conversations.
Does it do subversion out of the box?
Not sure why the parent was modded "funny", they have a good point. If somebody is delusional they believe their own claims. Imagine, for example, if this woman was given an MRI.
Most students take both examples as illustrating a statistical point. However, each year I get a few students who foam at the mouth when presented with one or the other of the examples. Interestingly (to me), the students who get bent out of shape when told about one of the cases always love hearing about the other one.
All of us are subject to perception bias - when you're sitting on the right side of the theater, everything on the screen looks tilted left to you, and vice versa. The same principle applies to political views. Most people aren't so extreme that they can't accomodate some variance in views, but there's always going to be a group who don't like to hear anything that contradicts their preconceptions, and if you tell them concepts they don't want to hear they view it as proof that you are unfairly biased. As an extreme example, I had one student tell me flat out that he would rather toss out all of the math we had worked through than believe statistics "if statistics claimed that Democrats had gotten it right and Republicans had gotten it wrong 40 years ago."
Unless you're being pursued by an alien, a killer robot, or the undead. Then safety brakes are guaranteed to fail. It's written into their specs.
1) I don't think most people have a valid mental map of what the pieces are, let alone how they fit together. At least once a month I find myself repeating to my dad "No, Internet Explorer is not the web. No, e-mail is not the web." The man is not an idiot, quite the opposite - he has over 50 patents to his name. However, he's 80 years old and never used computers before retirement. 2) I'd like people to understand the difference between supply-push and demand-pull in communications. Don't e-mail a copy of your 20M Powerpoint to everybody in the department, put a link to a copy on your personal web page and e-mail the link.
Yeah, but how many of those frogs had fillings in their teeth?