I have a bunch of Kodak gold CD-Rs. They didn't cost much more than the aluminum CD-Rs. Unfortunately, Kodak has stopped making them. Kodak now uses a silver/gold alloy in their Ultima CD-Rs.
The problem with the high-end audio industry is the large number of crooks and charlatans who are more interested in getting rich off gullible audiophiles than they are in accurate sound reproduction. I'm not an EE, but even I can recognize the pseudo-scientific bullshit in much of the high-end product literature. Add to that the inability of many audiophiles to acknowledge that it is very easy to deceive yourself when comparing audio equipment.
There needs to be a middle ground between the mass market junk sold in chain stores and the grossly overpriced and under-engineered equipment sold in "audio salons". Every time I read about $100 a foot speaker wire, hand woven out of virgin silver thread by Buddhist monks in Tibet, I want to beat the salesman to death with a book on transmission line theory.
They own the disk drives, not the data stored on those drives. If I park my car in a free parking lot, the owner of the lot does not have the right to sell or scrap my car.
Well, some movies pay for themselves. A lot don't. And even with the ones that you would think made vast amounts of profit, like "Titanic", the movie studio claims it 'barely broke even' in U.S. sales.
This is the infamous "Hollywood accounting", a branch of applied mathematics that enables movie studios and record companies to sell a product to every carbon based life form in the universe, and still claim that they haven't made a profit, and don't have to pay money to people whose contracts entitle them to a percentage of the net profits.
This strikes close to home, since I am in the process of excessing a large quantity of old and broken computer equipment. While I would like to sanitize all of the equipment, the problem is that much of it consists of non-functional computers and old hard drives. It would be more cost effective to destroy all of the hard drives than it would be to try to erase them. I'm not sure if the property management rules take that into consideration.
An important task for these supercomputers is stockpile stewardship, which means ensuring that nuclear weapons are safe and reliable as their internal components age and degrade.
These things have been around for a long time. Back in ancient times, many SCSI drives were actually ST-506 or ESDI drives with a SCSI bridge board bolted on top. Similar boards are made today to convert IDE drives to USB or FireWire.
Be aware that an IDE drive with a SCSI bridge board is unlikely to be as fast or reliable as a native SCSI drive. SCSI and IDE drives are designed with different goals.
The V1 was a pulsejet, not a ramjet. The two are very different. A pulsejet typically uses flapper valves to admit air into the combustion chamber and to force the combustion products out the back of the engine. They are very loud.
I would recommend this book to anyone interested in the subject. Part of the book includes the results of computer simulations on the probability and effects of impacts of extraterrestrial objects. A large number of objects "blow up" when they hit the atmosphere. The stress of atmospheric contact is so large that they disintegrate. Sort of like doing a belly flop at 1000 meters/second.
I've been told that Qualcomm was thinking about including encryption in the CDMA mobile phone standard. Under heavy pressure from the U.S. Government, the encryption algorithm was changed to XORing a static bit pattern with each frame of data. Needless to say, this is trivial to crack.
Ever try to make radio signals work over fiber? It doesn't work!
It does work, with the right equipment.
I know people who make regular use of fiber optic lines to relay analog S-band signals (2.3 GHz) from one building to another. This lets them test S-band transponders without hauling all of their test equipment to the building the transponder is located in.
I think you are being very unrealistic if you think you can buy a decent tape drive for $200. I've bought a number of cheap (less than $500) QIC/Travan drives, and they all died after a year or two of doing weekly full backups. I've had better luck with the Exabyte 8mm drives I use at work, but they cost a lot more than $200. One nice thing about the 8mm drives is that the tapes are cheap, about $5 each for the 112M 5GB tapes that I use.
I currently use CD-RW drives to backup my computers at home. The drives and media are cheap and reliable. Changing CDs is a pain in the neck, but this can be alleviated if you use backup software that supports incremental backups.
It's an old movie, but I still think it is the best movie about the attack on Pearl Harbor. It looks at the event from both the American and Japanese point of view.
If you are interested in history, read some of Gordon Prange's books on Pearl Harbor, such as "At Dawn We Slept". The U.S. knew that war was imminent, but we didn't know where and when it would start.
See this page for a buckling spring keyboard, like the original IBM PC keyboards. They used to sell the IBM 42H1292 keyboard, but it appears that they finally exhausted the stock on that model.
24-bit color is not good enough for some images. The problem is that the 256 levels per color are linear and human perception is logarithmic. If you stick wih linear intensity, you need to increase the bits per color to 12 or 16 bits.
Assume that everyone uses PGP for their email, and that it is impractical for the NSA to crack PGP encrypted messages. The NSA will still want to tap every data communications link that they can get access to. The reason is traffic analysis. You can get a lot of useful information by analyzing the source, destination and volume of messages. This is already a common intelligence gathering and criminal investigation technique when applied to call logs from telephone switching systems.
A modern fiber optic cable is probably using Erbium doped fiber amplifiers. These do not convert the light back into electrical signals. They directly amplify the light.
Telephone companies are common carriers. Internet Service Providers are not common carriers, according to rulings from the FCC.
Common carriers have to offer service on a non-discriminatory basis. ISPs have no such obligation.
It would also give the local school authorities an opportunity to cook the results. With so much riding on the results of the tests, the temptation to alter the results would be severe.
Why didn't the company validate the tests and the scoring process before releasing them to the school systems? There can be errors in the code, requirements and statistical models and techniques. They could have given the new tests to a sample of students along with reference tests that are never widely distributed. A comparison of the scores on the two tests should uncover any major errors.
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I have a bunch of Kodak gold CD-Rs. They didn't cost much more than the aluminum CD-Rs. Unfortunately, Kodak has stopped making them. Kodak now uses a silver/gold alloy in their Ultima CD-Rs.
Uncompressed HDTV runs at 1.5 gbps, and even that isn't good enough to match the resolution of 35mm film.
There needs to be a middle ground between the mass market junk sold in chain stores and the grossly overpriced and under-engineered equipment sold in "audio salons". Every time I read about $100 a foot speaker wire, hand woven out of virgin silver thread by Buddhist monks in Tibet, I want to beat the salesman to death with a book on transmission line theory.
They own the disk drives, not the data stored on those drives. If I park my car in a free parking lot, the owner of the lot does not have the right to sell or scrap my car.
This is the infamous "Hollywood accounting", a branch of applied mathematics that enables movie studios and record companies to sell a product to every carbon based life form in the universe, and still claim that they haven't made a profit, and don't have to pay money to people whose contracts entitle them to a percentage of the net profits.
This strikes close to home, since I am in the process of excessing a large quantity of old and broken computer equipment. While I would like to sanitize all of the equipment, the problem is that much of it consists of non-functional computers and old hard drives. It would be more cost effective to destroy all of the hard drives than it would be to try to erase them. I'm not sure if the property management rules take that into consideration.
An important task for these supercomputers is stockpile stewardship, which means ensuring that nuclear weapons are safe and reliable as their internal components age and degrade.
Be aware that an IDE drive with a SCSI bridge board is unlikely to be as fast or reliable as a native SCSI drive. SCSI and IDE drives are designed with different goals.
A.D. stands for Anno Domini, Year of our Lord in English. The problem is that for most of the world's population, Jesus is not "our lord".
The V1 was a pulsejet, not a ramjet. The two are very different. A pulsejet typically uses flapper valves to admit air into the combustion chamber and to force the combustion products out the back of the engine. They are very loud.
I would recommend this book to anyone interested in the subject. Part of the book includes the results of computer simulations on the probability and effects of impacts of extraterrestrial objects. A large number of objects "blow up" when they hit the atmosphere. The stress of atmospheric contact is so large that they disintegrate. Sort of like doing a belly flop at 1000 meters/second.
I've been told that Qualcomm was thinking about including encryption in the CDMA mobile phone standard. Under heavy pressure from the U.S. Government, the encryption algorithm was changed to XORing a static bit pattern with each frame of data. Needless to say, this is trivial to crack.
The National Institute of Standards and Technology (NIST) is part of the Commerce Department. There are a lot of smart people at NIST. They have been involved in computer and network technology for many years.
It does work, with the right equipment.
I know people who make regular use of fiber optic lines to relay analog S-band signals (2.3 GHz) from one building to another. This lets them test S-band transponders without hauling all of their test equipment to the building the transponder is located in.
I currently use CD-RW drives to backup my computers at home. The drives and media are cheap and reliable. Changing CDs is a pain in the neck, but this can be alleviated if you use backup software that supports incremental backups.
If you are interested in history, read some of Gordon Prange's books on Pearl Harbor, such as "At Dawn We Slept". The U.S. knew that war was imminent, but we didn't know where and when it would start.
See this page for a buckling spring keyboard, like the original IBM PC keyboards. They used to sell the IBM 42H1292 keyboard, but it appears that they finally exhausted the stock on that model.
24-bit color is not good enough for some images. The problem is that the 256 levels per color are linear and human perception is logarithmic. If you stick wih linear intensity, you need to increase the bits per color to 12 or 16 bits.
Assume that everyone uses PGP for their email, and that it is impractical for the NSA to crack PGP encrypted messages. The NSA will still want to tap every data communications link that they can get access to. The reason is traffic analysis. You can get a lot of useful information by analyzing the source, destination and volume of messages. This is already a common intelligence gathering and criminal investigation technique when applied to call logs from telephone switching systems.
A modern fiber optic cable is probably using Erbium doped fiber amplifiers. These do not convert the light back into electrical signals. They directly amplify the light.
Telephone companies are common carriers. Internet Service Providers are not common carriers, according to rulings from the FCC. Common carriers have to offer service on a non-discriminatory basis. ISPs have no such obligation.
Same here. I believe the Apple display has built-in scaling logic to make the display look good at non-native resolutions.
It would also give the local school authorities an opportunity to cook the results. With so much riding on the results of the tests, the temptation to alter the results would be severe.
Why didn't the company validate the tests and the scoring process before releasing them to the school systems? There can be errors in the code, requirements and statistical models and techniques. They could have given the new tests to a sample of students along with reference tests that are never widely distributed. A comparison of the scores on the two tests should uncover any major errors.
You lost the bid. It isn't your problem. Anything you say to the company will be taken the wrong way.