Nothing to get *that* excited about, though its good to see the upgrade price is at least in the right ballpark. The Crucial price on the 2gb module is an outlier -- for some reason its about double the market rate. Compare to Kingston for example.
First of all there is no a priori reason to assume any particular margin of error, since error is data-dependent. Scientific instruments often produce lots of data with good tolerances.
In this case we are observing the *same* ozone hole multiple times so the statistic to use is the repeated measures T-test or "paired" T-test. A paired T-test is a statistic on the derivative between dependent observations (e.g. site specific). It is possible to conclude with normal confidence bounds that the derivative is some non-zero value even if the extrapolation of that value still leaves the aggregate mean within its original error margin.
Indeed; in fact ideally such a system would not just specify the color in terms of its xy-chromaticity coordinates, but its entire spectral distribution, which would require an additional hundred words or so. The data requirements of are mind boggling to say the least.:)
I don't really know, unfortunately. Poking around on Google Scholar turns up a few references that look somewhat like it, e.g. by using some photonic tricks with femtosecond pulsed sources, multimode diodes etc.
The Novalux system appears to be yet-another RGB color mixing system, which does not make it much different from existing technology other than increased reliability, brightness, heat-factor etc.
Eventually, however, I expect laser TV to be based on a broadband white laser bounced off an electrostatically controlled diffraction grating (these already exist as MEMS devices already and I believe are licensed by Sony for laser TV applications). Such a system would be able to recreate arbitrary monochromatic wavelengths and therefore cover the entire gamut of visible color (i.e. not just a triangle of linear combinations of the primary colors).
I happen to work in an academic department where some of the faculty conduct animal research. For these people, you will notice such details as their name is not posted anywhere in the hallways and there are no directions to their office or lab anywhere. And believe me, there is nothing particularly interesting or scandalous about what they do. The university also has oversight bodies and there are lots of strict regulations they have to comply with (a few decades ago the situation was much more lax). However, the animal rights people do not really care what the research is for or the details of how it is conducted. They harrass people mostly based on the type of animal that they use for experimentation. For example it used to be that cats were very popular lab animal, but that practice has since ceased completely because of how much trouble it caused with activists. Currently monkeys are the most controversial animal. One of the tactics for getting out of the way of the animal people is to use obscure animals that people are not very familiar with, for example ferrets, because they just don't invoke the same emotional response (regardless of how intelligent they may be).
"Volume of air moved" is the wrong way to think about speakers (because its a meaningless construction in terms of physics). The correct way is in terms of impedance matching, i.e. efficiency of power transfer across the spectrum between the driver and the medium (e.g., open air, an ear (circumaural headphones), an ear canal (insert headphones), water (hydrophone), etc)
A large cone attached to a driver is one way to get good impedance matching for delivery of a low frequency, but not the only one and not necessarily the best since it has some drawbacks (mass, flexibility, fragility, etc). Even so, its often not that good, and a lot of speakers end up being absurdly overpowered because they are so inefficient. Its like having a sports car with bald tires... pointless.
Another way to do impedance matching is with an exponentially tapered waveguide, i.e. a horn. e.g. a brass instrument or an old acoustic record player. I don't vouch for the quality of Bose products, but the Bose "Wave" product essentially contains a long waveguide hidden in the box.
Other tricks include stuff like bass porting and resonant cabinets, and on most speakers you will see some combination of all the above.
There is actually a way to use an fMRI for real-time video. I've seen it up to about 15 fps. The resolution, however, is quite a bit worse and AFAIK its not useful for BOLD analysis which is why this capability is largely ignored by brain imaging researchers.
The cited "estimate" does not consider the significant loss of visual acuity at increasing angle of eccentricity. It takes the acuity of a foveally viewed target and extrapolates it to the entire field of view, so its probably off by at least an order of magnitude.
*sigh* okay, you got me. For all the humour deficient, yes it was a joke. Apparently a politically loaded one judging by the reaction. An hour ago my original post was modded +5 insightful until it was dragged back down by the Troll mods.
Yah, well its quite obvious what would happen once they run that background check.
UAV Operator: Looks like a middle eastern guy walking in a field. UAV Ops Manager: Ok, lets run a background check on this guy (calls NSA) NSA: Hold on a sec.. (calls up AT&T's "hidden room operator") AT&T: Right, here is his web access logs for the past three months. NSA: OMFG he googled for Bush Bobblehead dolls! (calls the FBI) FBI: Bush bobbleheads! (calls SWAT) SWAT: You are surrounded. Do not attempt to make fun of the president or you will be shot! Middle Eastern Guy: WTF? *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM*
Yes, its true -- Californians generally suffer from an excess of irrational optimism. That is not necessarily a bad thing, just something to be aware of.
Microsoft senior vice president Bob Muglia opened up TechEd 2006 in Boston Sunday evening by proclaiming that Windows Vista was the most secure operating system in the industry.
BWHAHAHAHAHAHA HAHA AH HAHA A WHAHAHAHABWAHA HAHAHA HAHAHAHHAHHAHAHAH!
Most of the questions that you pose have no well-defined answer. There is no question that labor conditions vary according to locale, and there is a fuzzy line between what is an acceptable disparity vs exploitation. Therefore it is (or should be) an issue of individual morale preference which is played out in the market -- but the rationality of any decision by market force is directly proportional to the quality and transparency of available information.
This highlights the control of information as one of the main factors that prevents the "free" market from actually self-regulating. Obviously then, activists who seek to change the situation will attempt to discover and disclose information with the largest possible impact, and that means a) the most extreme examples of exploitation, b) practices of large and very public companies and unfortunately quite often c) inaccurate or distorted accounts.
Its easy to blame activists for creating hyperbole, and its easy to criticize the social policy of foreign governments -- those are basically extrinsic judgements. But we should also consider the complicity of the corporations (and possibly their customers as well) in what is essentially a vast blanket of secrecy.
now if they can just engineer cats to 1) not pee on your bed, 2) have better smelling dumps 3) not be totally offthewall insane about 90% of the time and 4) take orders from their owners...
they just might make good pets.
Re:Bummer, trees
on
The Art of SQL
·
· Score: 2, Informative
FYI this book does mention many-to-many relations a few times, including its implications for multiple indexing and in the chapter on trees (since graphs are a generalization of trees where a node may have multiple parents). In the book there are 4 different data structures proposed for trees.
IANASE (I am not a storage expert) but according to "a comparison of disk drives for enterprise computing" (see latest issue of;login vol 31 no 3 by kurt chan), the common idea that "its okay until two out of three drives fail" is not quite accurate.
Here is the dirt (as I understand it): even if only one drive fails, you still have a non-zero probability of a non-recoverable read error on one of the remaining "good" drives during the rebuild. With a UER of 10^-14 bits (typical for SATA drives), rebuilding a drive in a 5x500GB RAID-5 array has a 20% chance of an unrecoverable error (or ~ 1.5% probability for a 10^-15 UER eg FC or SAS).
djbfft apparently had an edge at some point, but now has not been updated for more than 5 years. meanwhile FFTW has incremented the major version number to 3, undergone a complete rewrite, added simd, multiprocessor, 64bit and a slew of other things (its obviously not a stagnant project). not to mention its the basis of the 'fft' function in matlab and thereby probably the most used fft implementation in the world. assuming their benchmarks (which now include accuracy as well as speed) are valid, Intel Performance Suite is probably their closest competitor.
Ok, so first of all we all know that nobody walks home 10 miles. That is just common sense. And just why is it that *all of the sudden* after 9/11 you no longer live in Old Town?? Something smells fishy. Second, kerosene burns in lamps, and the pentagon is a very secretive place, so they probably don't have lights. Therefore they could not possibly have any kerosene there. Third, smoke rises so you couldn't possibly have smelled it from a *mile* away. Like what, the laws of physics just didn't apply that day? Well I asked a physics professor and he said the laws of physics *always* apply! So, just how is it that *you* would smell like kerosene unless, obviously, you had rubbed kerosene on your clothing to make people *think* there was a something like kerosene burning. As for the photograph, its obviously *you* that took the film because you didn't want any documented evidence that you were in fact at the National Airport the whole time! Obviously you were in the mysterious "unmarked white plane" and had just landed.
Nice try, Mr. Three-Letter-Agency, but we can see right through your web of lies.
Slashdot Mirror
Nothing to get *that* excited about, though its good to see the upgrade price is at least in the right ballpark. The Crucial price on the 2gb module is an outlier -- for some reason its about double the market rate. Compare to Kingston for example.
Well yes... if that text editor happens to be vi.
First of all there is no a priori reason to assume any particular margin of error, since error is data-dependent. Scientific instruments often produce lots of data with good tolerances.
In this case we are observing the *same* ozone hole multiple times so the statistic to use is the repeated measures T-test or "paired" T-test. A paired T-test is a statistic on the derivative between dependent observations (e.g. site specific). It is possible to conclude with normal confidence bounds that the derivative is some non-zero value even if the extrapolation of that value still leaves the aggregate mean within its original error margin.
Indeed; in fact ideally such a system would not just specify the color in terms of its xy-chromaticity coordinates, but its entire spectral distribution, which would require an additional hundred words or so. The data requirements of are mind boggling to say the least. :)
I don't really know, unfortunately. Poking around on Google Scholar turns up a few references that look somewhat like it, e.g. by using some photonic tricks with femtosecond pulsed sources, multimode diodes etc.
b er=968016 and http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumb er=1361727
Here are a couple links (though not necessarily representative, I just spent a couple minutes surfing) http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnum
The Novalux system appears to be yet-another RGB color mixing system, which does not make it much different from existing technology other than increased reliability, brightness, heat-factor etc.
Eventually, however, I expect laser TV to be based on a broadband white laser bounced off an electrostatically controlled diffraction grating (these already exist as MEMS devices already and I believe are licensed by Sony for laser TV applications). Such a system would be able to recreate arbitrary monochromatic wavelengths and therefore cover the entire gamut of visible color (i.e. not just a triangle of linear combinations of the primary colors).
Two years ago I used to live on that block of Exeter drive... no joking!
Not 400%, 400 *times* greater (40000%).
Except that Yau is a specialist in algebraic topology and differential geometry, not numerical mathematics or computer science.
Therefore the joke about denormal numbers is not funny because it lacks relevancy (IMHO).
I happen to work in an academic department where some of the faculty conduct animal research. For these people, you will notice such details as their name is not posted anywhere in the hallways and there are no directions to their office or lab anywhere. And believe me, there is nothing particularly interesting or scandalous about what they do. The university also has oversight bodies and there are lots of strict regulations they have to comply with (a few decades ago the situation was much more lax). However, the animal rights people do not really care what the research is for or the details of how it is conducted. They harrass people mostly based on the type of animal that they use for experimentation. For example it used to be that cats were very popular lab animal, but that practice has since ceased completely because of how much trouble it caused with activists. Currently monkeys are the most controversial animal. One of the tactics for getting out of the way of the animal people is to use obscure animals that people are not very familiar with, for example ferrets, because they just don't invoke the same emotional response (regardless of how intelligent they may be).
"Volume of air moved" is the wrong way to think about speakers (because its a meaningless construction in terms of physics). The correct way is in terms of impedance matching, i.e. efficiency of power transfer across the spectrum between the driver and the medium (e.g., open air, an ear (circumaural headphones), an ear canal (insert headphones), water (hydrophone), etc)
A large cone attached to a driver is one way to get good impedance matching for delivery of a low frequency, but not the only one and not necessarily the best since it has some drawbacks (mass, flexibility, fragility, etc). Even so, its often not that good, and a lot of speakers end up being absurdly overpowered because they are so inefficient. Its like having a sports car with bald tires... pointless.
Another way to do impedance matching is with an exponentially tapered waveguide, i.e. a horn. e.g. a brass instrument or an old acoustic record player. I don't vouch for the quality of Bose products, but the Bose "Wave" product essentially contains a long waveguide hidden in the box.
Other tricks include stuff like bass porting and resonant cabinets, and on most speakers you will see some combination of all the above.
I'm guessing the reviewer meant "I've only skimmed part 3" in the sense of "I've read the rest of the book but only skimmed through this part"...
Just a case of bad wording, they are not really *that* negligent.
There is actually a way to use an fMRI for real-time video. I've seen it up to about 15 fps. The resolution, however, is quite a bit worse and AFAIK its not useful for BOLD analysis which is why this capability is largely ignored by brain imaging researchers.
The cited "estimate" does not consider the significant loss of visual acuity at increasing angle of eccentricity. It takes the acuity of a foveally viewed target and extrapolates it to the entire field of view, so its probably off by at least an order of magnitude.
*sigh* okay, you got me. For all the humour deficient, yes it was a joke. Apparently a politically loaded one judging by the reaction. An hour ago my original post was modded +5 insightful until it was dragged back down by the Troll mods.
d =15229502
Actually I was inspired by a rather apocryphal slashdot post I once saw... here it is, for your amusement. http://yro.slashdot.org/comments.pl?sid=184448&ci
Yah, well its quite obvious what would happen once they run that background check.
UAV Operator: Looks like a middle eastern guy walking in a field.
UAV Ops Manager: Ok, lets run a background check on this guy (calls NSA)
NSA: Hold on a sec.. (calls up AT&T's "hidden room operator")
AT&T: Right, here is his web access logs for the past three months.
NSA: OMFG he googled for Bush Bobblehead dolls! (calls the FBI)
FBI: Bush bobbleheads! (calls SWAT)
SWAT: You are surrounded. Do not attempt to make fun of the president or you will be shot!
Middle Eastern Guy: WTF?
*BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM* *BLAM*
The Davinci Code? Puhleeze. Who would download that garbage? I only use bittorrent to download cheezy british scifi sitcoms from the 80s.
Yes, its true -- Californians generally suffer from an excess of irrational optimism. That is not necessarily a bad thing, just something to be aware of.
Microsoft senior vice president Bob Muglia opened up TechEd 2006 in Boston Sunday evening by proclaiming that Windows Vista was the most secure operating system in the industry.
BWHAHAHAHAHAHA HAHA AH HAHA A
WHAHAHAHABWAHA HAHAHA HAHAHAHHAHHAHAHAH!
*snort*
Yeah. That Bob guy is a pretty funny.
Most of the questions that you pose have no well-defined answer. There is no question that labor conditions vary according to locale, and there is a fuzzy line between what is an acceptable disparity vs exploitation. Therefore it is (or should be) an issue of individual morale preference which is played out in the market -- but the rationality of any decision by market force is directly proportional to the quality and transparency of available information.
This highlights the control of information as one of the main factors that prevents the "free" market from actually self-regulating. Obviously then, activists who seek to change the situation will attempt to discover and disclose information with the largest possible impact, and that means a) the most extreme examples of exploitation, b) practices of large and very public companies and unfortunately quite often c) inaccurate or distorted accounts.
Its easy to blame activists for creating hyperbole, and its easy to criticize the social policy of foreign governments -- those are basically extrinsic judgements. But we should also consider the complicity of the corporations (and possibly their customers as well) in what is essentially a vast blanket of secrecy.
now if they can just engineer cats to 1) not pee on your bed, 2) have better smelling dumps 3) not be totally offthewall insane about 90% of the time and 4) take orders from their owners...
they just might make good pets.
FYI this book does mention many-to-many relations a few times, including its implications for multiple indexing and in the chapter on trees (since graphs are a generalization of trees where a node may have multiple parents). In the book there are 4 different data structures proposed for trees.
IANASE (I am not a storage expert) but according to "a comparison of disk drives for enterprise computing" (see latest issue of ;login vol 31 no 3 by kurt chan), the common idea that "its okay until two out of three drives fail" is not quite accurate.
Here is the dirt (as I understand it): even if only one drive fails, you still have a non-zero probability of a non-recoverable read error on one of the remaining "good" drives during the rebuild. With a UER of 10^-14 bits (typical for SATA drives), rebuilding a drive in a 5x500GB RAID-5 array has a 20% chance of an unrecoverable error (or ~ 1.5% probability for a 10^-15 UER eg FC or SAS).
djbfft apparently had an edge at some point, but now has not been updated for more than 5 years. meanwhile FFTW has incremented the major version number to 3, undergone a complete rewrite, added simd, multiprocessor, 64bit and a slew of other things (its obviously not a stagnant project). not to mention its the basis of the 'fft' function in matlab and thereby probably the most used fft implementation in the world. assuming their benchmarks (which now include accuracy as well as speed) are valid, Intel Performance Suite is probably their closest competitor.
Ok, so first of all we all know that nobody walks home 10 miles. That is just common sense. And just why is it that *all of the sudden* after 9/11 you no longer live in Old Town?? Something smells fishy. Second, kerosene burns in lamps, and the pentagon is a very secretive place, so they probably don't have lights. Therefore they could not possibly have any kerosene there. Third, smoke rises so you couldn't possibly have smelled it from a *mile* away. Like what, the laws of physics just didn't apply that day? Well I asked a physics professor and he said the laws of physics *always* apply! So, just how is it that *you* would smell like kerosene unless, obviously, you had rubbed kerosene on your clothing to make people *think* there was a something like kerosene burning. As for the photograph, its obviously *you* that took the film because you didn't want any documented evidence that you were in fact at the National Airport the whole time! Obviously you were in the mysterious "unmarked white plane" and had just landed.
Nice try, Mr. Three-Letter-Agency, but we can see right through your web of lies.