Redirects (with a meta refresh tag) are penalized if they happen within 10 seconds. However, Google probably won't catch redirects implemented with javascript. To parse javascripts that potentially end up in infinite loops is not an easy task.
>I'm pretty sure their book collection is well indexed, if they're offering this service. Probably with the google engine, too.
The Google engine relies upon the fact that web pages tend to link to each other. Most books don't (except maybe scientific publications), so the Google engine doesn't make much sense here.
This story looks like it's hyped. The device converts a flow of
particles caused by a pressure difference into an electrical
current. The paper itself (PDF,
you probably need to be a subscriber, but the abstract
should be accessible for everyone) shows efficiencies between 0.0001
and 0.04. The higher number is only obtained if the external load is
matched to the device within a factor 10, i.e., the device looses the
pressure difference if you don't use the current.
If we take one liter (1 kg) of water at a pressure of 30 cm, then
the energy contained is 2.94 J, of which 0.12 J will be available as
electrical output. By comparison, a 1500 mAh NiMH battery can store
6500 J. The efficiency of the water battery can probably be improved,
but let's face it, for small volumes and reasonable pressures, the
stored energy density will never be very high.
> This is hardly surprising. Microsoft's intention was never to build the greatest browser, but to simply build a browser that would net them the largest market share.
Why would MS want to obtain a large market share with something they hand out for free? With operating systems, the interests are clear: more OS sales means more money. But why does it matter whether someone runs their browser (which is for free) or someone else's (which may or may not be free). It sounds like addiction to power, or am I missing something?
The logical next step would be that you will have to buy IE for, say, $50, but that does not make sense since the whole potential market is running an operating system with that same browser built-in. Or is the time there that the browser shipped with the OS will be stripped down and you'll have to pay extra for full features? I don't get it.
>same technology be used to alter ink colors for super high-resolution laser printing?
The whole point of the article is that the laser beam can modify something embedded inside a cell without affecting the surface of the cell. This is not an issue with laser printing. What you are describing is actually built into any CD/DVD burner. One bit on a CD is about 1500 nm in size, or on a DVD 500 nm. 500 nm per pixel corresponds to 50 kDPI.
Of course, the mechanics that control the position of the laser need to be redesigned, but for what purpose other than data storage would you want a 10 kDPI image? Note that the resolution is insufficient for "writing" holograms.
Well, that might work for a loud rock band, but for a registration of acoustical instruments (think classical chamber music with very quiet parts), I'm quite sure that computer fans can be heard. Especially so if the recording is with one stereo pair of microphones, or if there is an extra microphone somewhere in the back to pick up the reverberation.
The TNO study has been carried out with low field strengths, comparable to those from a base station to which one can maximally be exposed to in daily situations. Computer calculations show that it is
unlikely that the statistically significant effects, as found in this study, are of thermal origin.
Note: "low field strengths" means "low comparable to the high strengths in the case you are holding a phone next to your ear", according to the paper.
The paper mentions statistically significant effects on 72 persons. That must be pretty big differences. However, the paper nowhere mentions whether the experiment was actually (double)-blinded. TNO is a reputable organization, but I wouldn't take the conclusions for granted without reading the details of the study. A few years ago, a brand of liquid laundry detergent announced in a TV commercial that this detergent was better than all the others according to a TNO study. The ad didn't mention that the study only compared liquid detergents, which are overall worse than powder-type detergents.
> send it in a searchable format over the Internet
The example PDFs on the web site are scanned bitmaps and at least I am not able to search for text strings in them. Is there a new Acrobat Reader with built-in OCR?
>Provide tools for the user to monitor their current bandwidth usage, [...] a webpage that can be visited occasionally should the user not wish to keep an extra program running.
Is it actually so easy to implement this on the provider side? Do switches have the processing capacity to count every passing packet (possibly 100000 per second), and determine what to do with a packet depending on whether the user is marked as capped in some database?
>Is the problem eliminated by keeping them in lead boxes?
Lead is to shield radioactivity (mainly gamma rays) and X-rays. To shield EM radiation, you need a good conductor, for example 1 mm copper plating without any holes.
>Also worth considering is that CDR dyes are sensitive to radiation at 780 nm. That's heat. So we have to protect a heat-sensitive disc from, well, heat.
The fact that both 780 nm and heat radiation are infrared does not imply that 780 nm is heat radiation. The peak wavelength L of thermal radiation relates to the temperature as L=0.003/T, where T is the temperature in kelvin. Hence, 780 nm corresponds to 3800 K, wheras typical thermal radiation (T=400 K) corresponds to 7900 nm. The whole range from 750 nm to
about 1 mm is infrared.
>DVD-R dyes are sensitive to radiation at 635-650 nm. That's red light. So we have to protect the discs from light, which is somewhat easier.
In photodegradation processes, shorter wavelengths usually have a much larger impact, think blue - ultraviolet ( <470 nm). The binding energy of molecular bonds is typically in the same order of magnitude as the energy of UV photons.
Hence, both types of media should be protected from bright light, especially UV-rich sun light.
>Then you have the problem with getting hardware which will read the disks in 20 years or 50 years.
I'd say that CDs, which have had the same format since their invention (1980?) will continue to be readable for quite a few decades. Most people have a shelve full of audio CDs that they will want to playback now and in 30 years. Mind you that you still can buy turntables to play vinyl LPs.
The filesystem format used currently (iso9660 with rock-ridge for long filenames) might be slightly less preservable, but I think that the main problem is the file formats themselves. Will you be able to open an Office 97 document in the year 2023? Or a PDF? Or a file from some specialized CAD program?
> Exhibit 4 - From a pair of shoes. The symbols apparently mean leather uppers, cloth interior and diamonds on the soles
I don't know what it's like in the USA, but in Europe (at least in Sweden and Netherlands), most shoes in the stores have these symbols. I believe that the `diamond' means it's synthetic material, though I'm not sure whether it only applies to molded synthetics.
>Worms self-propogate. A virus only propogates when run by a user.
No, if the thing attaches to legitimate Word documents and executables and whatever, it is a virus. If it is a standalone program, it is a worm. See here..
> The quickest way to stop spam [...] say that [...]
1) There is no way to increase the size of your body parts, 2) The cheap Viagra is not Viagra,
Unfortunately, you risk that people just remember "cheap viagra" and "increase the size", with the opposite effect as a result.
In Netherlands, there is or may was an urban legend that a big tea brand will donate a wheelchair to whoever gathers one million tea bag labels of that brand. Presumably, the tea brand tried informing the world through advertisements in the newspapers, but that turned out to only increase the number people requesting more information.
> Rather than pulling out the tester each time I needed to see if a circuit was "hot," I'd just touch it. [...] most of the time I was in thick-soled work boots, standing on the plywood subfloor of a partially-constructed house.
I'm surprised that you actually felt something. I sometimes stick pieces of metal in the wall outlet at 230 V (to scare other people:), always making sure that I am wearing shoes with rubber soles on a nonconducting surface and I never felt anything.
I've known a guy who did the electric construction for the Dutch railways (1800 V DC) and he claimed that they often have to work on a live system, only isolated from the grounded railway tracks by a 4-meter-long wooden ladder on wheels. He said that you don't feel anything in dry wheather, and just a bit of tingling sensation when it was raining.
To get an electrical shock, you need to be in contact with two conductors simultaneously. I find it hard to understand why you could get a shock while standing on dry plywood, unless you brushed to wires at the same time.
> I dont think the shielding is all that effective.
According to this microwave oven safety page, the legal limit of leaking radiation for a new oven is 1 mW/cm2 at 5 cm from the oven (for a used oven, it's 5 mW/cm2). For a complete oven measuring 25x40x30 cm, that would be a legal limit of 70 W if it radiates uniformly in all directions. (The page mentions that it's rather rare for an oven to exceed the limits). For a used oven, I'd guess that the door seal is the most critical place, which would correspond to about 1 W for 1 mW/cm2 at 5 cm from the seal.
>whereas 802.11a and b currently operate primarily at 2.4 Ghz
Interestingly, microwave ovens operate at 2.45 GHz (not listed on the spectrum allocation chart mentioned elsewhere). I wonder how effective the shielding of a typical microwave oven is. If they leak 1% (for example when loaded with a very small amount of food), then that's still 8 W, compared to 1 W for a GSM mobile at 1.8 GHz. I don't know either within what tolerance MW ovens are; for the food inside it doesn't matter very much whether it is 2.2 or 2.6 GHz.
> the magnetic field is set up on the rotor by a DC voltage.
Aah, I see!
> Amperage is proportional to applied torque.
I'd say that it's the other way around, because the amperage for a given load is determined by the voltage (rotation speed and magnetic field). I think that in a power plant, the load is dependent on the phase difference between grid and generator. No phase difference means no load; increasing the torque merely increases the phase difference, and hence load and amperage. So, the above statement is from the point of view of a power plant operator (you). On my bicycle, more torque just means that the dynamo will run faster (with both more volts and more amps). Or am I missing something?
> You (...) match voltage and when everything is all set, take the switch to shut just prior to the syncroscope reaching the 12 o'clock position
How can one match the output voltage of a generator? I'd think that voltage is only dependent on load (slightly decreasing V with increasing load) and rotation speed (V proportional to frequency).
>None of these spam filters will have any effect on spam at all if they are just installed on the systems of people who hate spam and would never buy from a spammer anyway.
Still, there are plenty of people who hate spam but don't know how to handle it. At our department, quite a few people receive over 30 spams per day and hate it, but no one has installed a spam filter better than the subject/sender filter built-in in their (Windows) mail clients. One has stopped reading e-mail from his university account and asks us to send mail to a private address, because he isn't allowed to change his email address.
I mentioned Bayesian filters, but it turns out that not every computer user enjoys downloading and trying out five different programs to see whether they filter effectively and work together with their existing mail software. On top of that is the fear of false positives. (I am one of the few Linux users and on top of that I don't receive so much spam that I should worry, so I can't advise them.)
Oops, wrong, long comment pages got truncated. Try again:
SCO Targets US Government, TiVo: 1.86%
Real Announce Helix Grant Program, Player: 3.96%
Former Intel Engineer Pleads Guilty To Taliban Aid: 1.67%
Novell To Cease NetWare Development?: 8.18%
Sinclair's Answer To The Segway: 0.00%
Given these numbers, it seems that about 2-5% of the active/. readers is a subscriber. If they have a maximum of 30 ad suppressions per day, they each contribute US$ 0.15 per day. The big unknown is of course the number of active/. readers. If it's 50000, then that's 1000-2500 subscribers, or US$ 150-375 per day.
Slashdot Mirror
They do. Search for google penalty redirect, google penalty hidden.
Redirects (with a meta refresh tag) are penalized if they happen within 10 seconds. However, Google probably won't catch redirects implemented with javascript. To parse javascripts that potentially end up in infinite loops is not an easy task.
The Google engine relies upon the fact that web pages tend to link to each other. Most books don't (except maybe scientific publications), so the Google engine doesn't make much sense here.
If we take one liter (1 kg) of water at a pressure of 30 cm, then the energy contained is 2.94 J, of which 0.12 J will be available as electrical output. By comparison, a 1500 mAh NiMH battery can store 6500 J. The efficiency of the water battery can probably be improved, but let's face it, for small volumes and reasonable pressures, the stored energy density will never be very high.
Why would MS want to obtain a large market share with something they hand out for free? With operating systems, the interests are clear: more OS sales means more money. But why does it matter whether someone runs their browser (which is for free) or someone else's (which may or may not be free). It sounds like addiction to power, or am I missing something?
The logical next step would be that you will have to buy IE for, say, $50, but that does not make sense since the whole potential market is running an operating system with that same browser built-in. Or is the time there that the browser shipped with the OS will be stripped down and you'll have to pay extra for full features? I don't get it.
The whole point of the article is that the laser beam can modify something embedded inside a cell without affecting the surface of the cell. This is not an issue with laser printing. What you are describing is actually built into any CD/DVD burner. One bit on a CD is about 1500 nm in size, or on a DVD 500 nm. 500 nm per pixel corresponds to 50 kDPI.
Of course, the mechanics that control the position of the laser need to be redesigned, but for what purpose other than data storage would you want a 10 kDPI image? Note that the resolution is insufficient for "writing" holograms.
Well, that might work for a loud rock band, but for a registration of acoustical instruments (think classical chamber music with very quiet parts), I'm quite sure that computer fans can be heard. Especially so if the recording is with one stereo pair of microphones, or if there is an extra microphone somewhere in the back to pick up the reverberation.
How do you get rid of the noise from buzzing fans when you are recording with a desktop computer?
The (Dutch) summary given by the researchers says:
Note: "low field strengths" means "low comparable to the high strengths in the case you are holding a phone next to your ear", according to the paper.The paper mentions statistically significant effects on 72 persons. That must be pretty big differences. However, the paper nowhere mentions whether the experiment was actually (double)-blinded. TNO is a reputable organization, but I wouldn't take the conclusions for granted without reading the details of the study. A few years ago, a brand of liquid laundry detergent announced in a TV commercial that this detergent was better than all the others according to a TNO study. The ad didn't mention that the study only compared liquid detergents, which are overall worse than powder-type detergents.
The example PDFs on the web site are scanned bitmaps and at least I am not able to search for text strings in them. Is there a new Acrobat Reader with built-in OCR?
Is it actually so easy to implement this on the provider side? Do switches have the processing capacity to count every passing packet (possibly 100000 per second), and determine what to do with a packet depending on whether the user is marked as capped in some database?
Lead is to shield radioactivity (mainly gamma rays) and X-rays. To shield EM radiation, you need a good conductor, for example 1 mm copper plating without any holes.
>Also worth considering is that CDR dyes are sensitive to radiation at 780 nm. That's heat. So we have to protect a heat-sensitive disc from, well, heat.
The fact that both 780 nm and heat radiation are infrared does not imply that 780 nm is heat radiation. The peak wavelength L of thermal radiation relates to the temperature as L=0.003/T, where T is the temperature in kelvin. Hence, 780 nm corresponds to 3800 K, wheras typical thermal radiation (T=400 K) corresponds to 7900 nm. The whole range from 750 nm to about 1 mm is infrared.
>DVD-R dyes are sensitive to radiation at 635-650 nm. That's red light. So we have to protect the discs from light, which is somewhat easier.
In photodegradation processes, shorter wavelengths usually have a much larger impact, think blue - ultraviolet ( <470 nm). The binding energy of molecular bonds is typically in the same order of magnitude as the energy of UV photons.
Hence, both types of media should be protected from bright light, especially UV-rich sun light.
Google says that a Thorens TD-170 turntable is what you need. Otherwise, look at 78rpm.com.
I'd say that CDs, which have had the same format since their invention (1980?) will continue to be readable for quite a few decades. Most people have a shelve full of audio CDs that they will want to playback now and in 30 years. Mind you that you still can buy turntables to play vinyl LPs.
The filesystem format used currently (iso9660 with rock-ridge for long filenames) might be slightly less preservable, but I think that the main problem is the file formats themselves. Will you be able to open an Office 97 document in the year 2023? Or a PDF? Or a file from some specialized CAD program?
20:00 GMT - $20
20:09 GMT - $20.50
20:16 GMT - $61
20:23 GMT - $275
20:28 GMT - $300
20:37 GMT - $321
20:45 GMT - $350
21:06 GMT - $9700
21:55 GMT - $20,100
(several cancellations)
22:00 GMT - $390
22:16 GMT - $760
22:27 GMT - $780
It is now 22:29 GMT on my watch.
> Exhibit 4 - From a pair of shoes. The symbols apparently mean leather uppers, cloth interior and diamonds on the soles
I don't know what it's like in the USA, but in Europe (at least in Sweden and Netherlands), most shoes in the stores have these symbols. I believe that the `diamond' means it's synthetic material, though I'm not sure whether it only applies to molded synthetics.
No, if the thing attaches to legitimate Word documents and executables and whatever, it is a virus. If it is a standalone program, it is a worm. See here..
Unfortunately, you risk that people just remember "cheap viagra" and "increase the size", with the opposite effect as a result.
In Netherlands, there is or may was an urban legend that a big tea brand will donate a wheelchair to whoever gathers one million tea bag labels of that brand. Presumably, the tea brand tried informing the world through advertisements in the newspapers, but that turned out to only increase the number people requesting more information.
I'm surprised that you actually felt something. I sometimes stick pieces of metal in the wall outlet at 230 V (to scare other people :), always making sure that I am wearing shoes with rubber soles on a nonconducting surface and I never felt anything.
I've known a guy who did the electric construction for the Dutch railways (1800 V DC) and he claimed that they often have to work on a live system, only isolated from the grounded railway tracks by a 4-meter-long wooden ladder on wheels. He said that you don't feel anything in dry wheather, and just a bit of tingling sensation when it was raining.
To get an electrical shock, you need to be in contact with two conductors simultaneously. I find it hard to understand why you could get a shock while standing on dry plywood, unless you brushed to wires at the same time.
According to this microwave oven safety page, the legal limit of leaking radiation for a new oven is 1 mW/cm2 at 5 cm from the oven (for a used oven, it's 5 mW/cm2). For a complete oven measuring 25x40x30 cm, that would be a legal limit of 70 W if it radiates uniformly in all directions. (The page mentions that it's rather rare for an oven to exceed the limits). For a used oven, I'd guess that the door seal is the most critical place, which would correspond to about 1 W for 1 mW/cm2 at 5 cm from the seal.
Interestingly, microwave ovens operate at 2.45 GHz (not listed on the spectrum allocation chart mentioned elsewhere). I wonder how effective the shielding of a typical microwave oven is. If they leak 1% (for example when loaded with a very small amount of food), then that's still 8 W, compared to 1 W for a GSM mobile at 1.8 GHz. I don't know either within what tolerance MW ovens are; for the food inside it doesn't matter very much whether it is 2.2 or 2.6 GHz.
Aah, I see!
> Amperage is proportional to applied torque.
I'd say that it's the other way around, because the amperage for a given load is determined by the voltage (rotation speed and magnetic field). I think that in a power plant, the load is dependent on the phase difference between grid and generator. No phase difference means no load; increasing the torque merely increases the phase difference, and hence load and amperage. So, the above statement is from the point of view of a power plant operator (you). On my bicycle, more torque just means that the dynamo will run faster (with both more volts and more amps). Or am I missing something?
How can one match the output voltage of a generator? I'd think that voltage is only dependent on load (slightly decreasing V with increasing load) and rotation speed (V proportional to frequency).
Still, there are plenty of people who hate spam but don't know how to handle it. At our department, quite a few people receive over 30 spams per day and hate it, but no one has installed a spam filter better than the subject/sender filter built-in in their (Windows) mail clients. One has stopped reading e-mail from his university account and asks us to send mail to a private address, because he isn't allowed to change his email address.
I mentioned Bayesian filters, but it turns out that not every computer user enjoys downloading and trying out five different programs to see whether they filter effectively and work together with their existing mail software. On top of that is the fear of false positives. (I am one of the few Linux users and on top of that I don't receive so much spam that I should worry, so I can't advise them.)
SCO Targets US Government, TiVo: 1.86%
Real Announce Helix Grant Program, Player: 3.96%
Former Intel Engineer Pleads Guilty To Taliban Aid: 1.67%
Novell To Cease NetWare Development?: 8.18%
Sinclair's Answer To The Segway: 0.00%
Given these numbers, it seems that about 2-5% of the active /. readers is a subscriber. If they have a maximum of 30 ad suppressions per day, they each contribute US$ 0.15 per day. The big unknown is of course the number of active /. readers. If it's 50000, then that's 1000-2500 subscribers, or US$ 150-375 per day.