A more sensible comparison to civil engineering would perhaps bee that we in that field have to comply to a large number of standards and norms whenever we design and build stuff. Sanitizing database input is fairly equivalent to meeting fire code standards. I.E. Escalators that catch fire tend to do so because of litter. Littering is illegal but the escalator should still be safe to use in a real world environment.
Having standards and holding coders liable would indeed make progress slower but it would also add a new level of much needed maturity to the software industry.
This is probably why my google calender app on my iphone switches to French when I am using it on my home network. I live in Sweden but somehow my ISP has been designated as French and I get a lot of French ads when browsing from home.
Its weird and somewhat annoying but I am getting a chance to brush up my French.
It seems that at least here in Sweden there will be a collectors edition available on launch day. It contains several extras usable in game, but not wardens keep. It is also priced at 250 SEK (~40 USD) above the retail version.
Actually, the german gmail service has always been called googlemail. I dont think they would have gone through the trouble of renaming their service if the guy would have accepted a reasonable offer.
Actually, they often develop the specs themself and let the koreans develop the tech.
Jens of sweden is a company that brings cool korean gadgets to europe. But not any cool gadget, only those up to their specs. If nothing fits the koreans adapt their products. Capitalism in a nutshell.
I have a link but its in swedish so its of no use anyway.
If its bright enough you will see it. Do the calculations again but use a star instead of the asteroid, then be amazed that the sky isnt black all the time.
Hmmm. I wonder what kind of aberations one could expect from these? Normal lenses are spherical and expensive special-purpouse lenses are hyperbolical, This lens seems more likely to have a Bessel-shape. It will probably work better than the pinhole cameras in modern cellphones but I wouldnt expect them in any high performance imaging equipment anytime soon.
Aberations aside, its always cool to se new technology emerge in the field of visual optics. The field of optical science is realy realy old and still there are many more things to be discovered.
If the car determines that the driver is sleepy it should turn on (up) the stereo and perhaps start a mild vibration in the stearing wheel (that usualy gets your attention). If the driver fails to wake up the car will already have crashed or he isnt sleeping. Its not microsoft who designs these systems you know....
I dont drink and drive bit this has lots appeal to me.
In Sweden (where I live) 50% of all car related casualities are also alcohol-related. The technology for detecting a drunk or stoned (or sleeping) driver does not have to be intrusive. It could just as well be a sensor on the dashboard tracking iris movements or similar. This type of "driver aware" technology exists and will only save lives if its mandatory. I for one will gladly pay the extra cash for a more secure car knowing that the cars around me also are more secure (or at least have more secure drivers). This also have anti theft uses...
So, If I dont buy any tagged stuff or "zap" the tags when I get home, I dont get any advertising?
It would be nice to be able to avoid all the ads not aimed at me (womens products, diapers, suvs). But if Joe Average only sees targeted ads (them being vasly more efficient), living "off the grid" could mean an ad free environment. Im talking in a minrity report kind of world here so its probably a long way of.
But it would be interseting to know if targeted advertising could eliminate all other forms of bulk advertising.
There is no such thing as volatile fuel in an atmosphere-less environment.
Unless the tank next to it happens to carry the oxidizing agent. In space the fule is never "just hydrogen" or anything similar. The oxygene also has to be carried in to space and be stored on/at the station.
Well, with the annectation of polen and the baltic states they did more or less brake even, population wise.
It wasnt as much the explosion that put them of as the fact that _all_ of their computer systems where deemed unsafe over night. Kind of back to square one . It would have put them back almost a decade.
And as for Adolf, most of us think it was a good thing that he lost the war.
if 400 people wayst half a days worth of productivity watching the sysadmin clean up and get the network going it will amount to approximately one years salary.
But then again. That time usualy isnt entirely unproductive. Some people will get more "real" work done if the email is down. And most people will catch up during the rest of the day.
Sometimes they do look for a conformist that will work hard and implement company policy without asking to many questions. In those cases a well written and not to bold resume/CV could help. Unfortunately you dont have much chance of knowing that until after the interview.
It's mathematically impossible to represent analog waves in binary without making assumptions that hurt audio unless you over sample.
That is correct. The issue is how much you have to oversample.
1) What if you want a triangle wave instead of a sine wave in your example? What about any wave that is skewed like a lot of audio is, and that defines what an instrument sounds like. A violin doesn't make a perfect sine wave when playing a note, and thus the harmonics aren't going to be the same.
quite correct. But what is the frequency of the highest harmonic? This is what is called the bandwidh of the signal and if you sample the signal at a sampling rate that is higher than twice the bandwith you will be able to recreate the original signal. This is Nyquist theorem and your belif that this is thrash is what leads you astray.
2) Phase shifting the wave to fit is the WORST thing you could do to harmonics.
If you sample according to Nyquist, the recorded signal will contain all necessary information to recreate the original wave, INCLUDING phase. There is no need to phase shift, or to be concerned about phase at all. The ONLY degenerate case is when you sample at EXACTLY twice the frequency of the signal (as in you example), but if you look closely, Nyquist doesent allow that. And you only have to up the sampling frequency by a notch to get it covered.
3) Wavelets would be great...
Yes they would. Its not just a military technology but the "audiophile"-contolled hifi industry wont catch up in a long time. But it is THE optimum, storage method (that can be proven mathematicly). This we agree upon.
1) It assumes that you can take a measurement wherever you feel instead of where the clock signals.
No it does not. I would again recomend a class in either signal processing, fourier analysis or control theory.
2) It assumes that the wave is a sine wave
No, it only assumes that the wave is continuous and has continuous higher derivatives. Wich all waveforms emanating from real life objets satisfy (but not a triangle wave, a square wave, or any other wave with infinite bandwidh, but those doesent exist in nature).
If the waveform is not a sine it can be described as a sum of sines where the last element in the sum has the same frequency as the bandwidh of the highest harmonic. A perfect triangle wave or square wave has infinite high harmonics and can not be stored perfectly in any way digitaly or analog. There will always be residual errors.
Not You nor any one else can hear the difference between a sine and a triangle wave if the period of the base frequency is 20 kHz. Why, because the second harmonic is at 40kHz and that is way beond human hearing. If they sound differently in your hifi set up its because the higher harmonics are reacing havoc in your filters.
It seems that you have missunderstood the concepts of frequency versus period. Only sines that have been going on forever has one frequency (0 bandwidh), all other waves have bandwith and periods (base frequency).
I highly suggest that you read a book or take a class about this because your have missunderstood quite a lot. Do not underestimate the power of the Nyquist theorem. It is the ultimate sampling theorem in the universe.
Slashdot Mirror
A more sensible comparison to civil engineering would perhaps bee that we in that field have to comply to a large number of standards and norms whenever we design and build stuff. Sanitizing database input is fairly equivalent to meeting fire code standards. I.E. Escalators that catch fire tend to do so because of litter. Littering is illegal but the escalator should still be safe to use in a real world environment.
Having standards and holding coders liable would indeed make progress slower but it would also add a new level of much needed maturity to the software industry.
This is probably why my google calender app on my iphone switches to French when I am using it on my home network. I live in Sweden but somehow my ISP has been designated as French and I get a lot of French ads when browsing from home.
Its weird and somewhat annoying but I am getting a chance to brush up my French.
It seems that at least here in Sweden there will be a collectors edition available on launch day. It contains several extras usable in game, but not wardens keep. It is also priced at 250 SEK (~40 USD) above the retail version.
Take a look at comsol multiphysics. It probably has the tools you need.
http://www.comsol.com/
Actually, the german gmail service has always been called googlemail. I dont think they would have gone through the trouble of renaming their service if the guy would have accepted a reasonable offer.
It certainly puts the old proverb of mouse and men in a new perspective.
The scientist where probably called scared mice by their bullies at school you know.
An apology note was sent out to all his victims via email.....
Actually, they often develop the specs themself and let the koreans develop the tech.
Jens of sweden is a company that brings cool korean gadgets to europe. But not any cool gadget, only those up to their specs. If nothing fits the koreans adapt their products. Capitalism in a nutshell.
I have a link but its in swedish so its of no use anyway.
a blip would be the pixel registering somthing other than black in this context. I dont think its a word that has a scientiffic definition.
blip in a pixel, a single pixel going blip, whatever, this is only slashdot you know. =)
Just because its smaller than a pixel doesent imply that it is invisible. As long as there is light coming of it it wil register as a blip in a pixel.
So they are looking for a darker blip next to the gray blip that is sedna.
Its more likely to have had a moon that slowed its rotation but then the moon somehow got lost.
Things can get messy out there in the kupier belt. Its not a place where you want to be alone late at night.
If its bright enough you will see it. Do the calculations again but use a star instead of the asteroid, then be amazed that the sky isnt black all the time.
Aberations aside, its always cool to se new technology emerge in the field of visual optics. The field of optical science is realy realy old and still there are many more things to be discovered.
I hope your not an automotive engineer.
If the car determines that the driver is sleepy it should turn on (up) the stereo and perhaps start a mild vibration in the stearing wheel (that usualy gets your attention). If the driver fails to wake up the car will already have crashed or he isnt sleeping. Its not microsoft who designs these systems you know....
I dont drink and drive bit this has lots appeal to me.
In Sweden (where I live) 50% of all car related casualities are also alcohol-related. The technology for detecting a drunk or stoned (or sleeping) driver does not have to be intrusive. It could just as well be a sensor on the dashboard tracking iris movements or similar. This type of "driver aware" technology exists and will only save lives if its mandatory. I for one will gladly pay the extra cash for a more secure car knowing that the cars around me also are more secure (or at least have more secure drivers). This also have anti theft uses...
So, If I dont buy any tagged stuff or "zap" the tags when I get home, I dont get any advertising?
It would be nice to be able to avoid all the ads not aimed at me (womens products, diapers, suvs). But if Joe Average only sees targeted ads (them being vasly more efficient), living "off the grid" could mean an ad free environment. Im talking in a minrity report kind of world here so its probably a long way of.
But it would be interseting to know if targeted advertising could eliminate all other forms of bulk advertising.
There is no such thing as volatile fuel in an atmosphere-less environment.
Unless the tank next to it happens to carry the oxidizing agent. In space the fule is never "just hydrogen" or anything similar. The oxygene also has to be carried in to space and be stored on/at the station.
--
Well, with the annectation of polen and the baltic states they did more or less brake even, population wise.
It wasnt as much the explosion that put them of as the fact that _all_ of their computer systems where deemed unsafe over night. Kind of back to square one . It would have put them back almost a decade.
And as for Adolf, most of us think it was a good thing that he lost the war.
if 400 people wayst half a days worth of productivity watching the sysadmin clean up and get the network going it will amount to approximately one years salary.
But then again. That time usualy isnt entirely unproductive. Some people will get more "real" work done if the email is down. And most people will catch up during the rest of the day.
Well its more likely that I wont hire you than that youll hire me anyway.
I spell bad In my native language aswell..
Sometimes they do look for a conformist that will work hard and implement company policy without asking to many questions. In those cases a well written and not to bold resume/CV could help. Unfortunately you dont have much chance of knowing that until after the interview.
Gold is cheap compared to platinum though.....
Wich happends to be Avogadros number times the Boltzman constant (so it should be easy to remember off-hand...). Just FYI.
But it is difficult to remember all those old farts the constants are named after.
That is correct. The issue is how much you have to oversample.
quite correct. But what is the frequency of the highest harmonic? This is what is called the bandwidh of the signal and if you sample the signal at a sampling rate that is higher than twice the bandwith you will be able to recreate the original signal. This is Nyquist theorem and your belif that this is thrash is what leads you astray.
If you sample according to Nyquist, the recorded signal will contain all necessary information to recreate the original wave, INCLUDING phase. There is no need to phase shift, or to be concerned about phase at all. The ONLY degenerate case is when you sample at EXACTLY twice the frequency of the signal (as in you example), but if you look closely, Nyquist doesent allow that. And you only have to up the sampling frequency by a notch to get it covered.
Yes they would. Its not just a military technology but the "audiophile"-contolled hifi industry wont catch up in a long time. But it is THE optimum, storage method (that can be proven mathematicly). This we agree upon.
No it does not. I would again recomend a class in either signal processing, fourier analysis or control theory.
No, it only assumes that the wave is continuous and has continuous higher derivatives. Wich all waveforms emanating from real life objets satisfy (but not a triangle wave, a square wave, or any other wave with infinite bandwidh, but those doesent exist in nature).
If the waveform is not a sine it can be described as a sum of sines where the last element in the sum has the same frequency as the bandwidh of the highest harmonic. A perfect triangle wave or square wave has infinite high harmonics and can not be stored perfectly in any way digitaly or analog. There will always be residual errors.
Not You nor any one else can hear the difference between a sine and a triangle wave if the period of the base frequency is 20 kHz. Why, because the second harmonic is at 40kHz and that is way beond human hearing. If they sound differently in your hifi set up its because the higher harmonics are reacing havoc in your filters.
It seems that you have missunderstood the concepts of frequency versus period. Only sines that have been going on forever has one frequency (0 bandwidh), all other waves have bandwith and periods (base frequency).
I highly suggest that you read a book or take a class about this because your have missunderstood quite a lot. Do not underestimate the power of the Nyquist theorem. It is the ultimate sampling theorem in the universe.
PS if my spelling is of its because im Swedish DS
tnx. Mayby thats why my karmas so low =)