Having read your previous comments further up the thread, I'm not really sure why I'm even replying to your rantings. I guess that they just hit so close to home that I couldn't avoid it.
I started to see a psychaitrist last summer because of the exact situation that you are claiming doesn't happen- an inability to focus on the things that I am usually very good at and like to do. Initially my doctor and I suspected depression or anxiety disorder. It was only after a few months that she recognized and started treating me for ADD that I started to feel any improvement- and it came fast.
Not everyone with ADD appears to be lazy. I watch very little TV, I have no video games installed on my computer. Instead I spend long hours working, because I have a job in R&D at a small speaker company that provides me with the opportunity to do things that I would find fun anyway. It's a bitch, however, when for no apparent reason concentration just slips away and you have no control over the distractions around you.
Some people have asked how to address this with their employers. I was lucky- my boss is the owner of the company, and I have found ways to make myself to valuable to lose in spite of my quirks. I had no problem telling my boss- it even helped him to understand how to help me to be more productive. Other people in my company knew that I was having some problems, but nobody ever doubted my work ethic. When I told people in my company that that I had ADD nobody was surprised- they saw it as being a sensible explanation for my well known oddities.
I guess that my point, if there is one, would be that not everyone with a diagnosis of ADD uses it as an excuse for their own laziness. That certainly does happen, and many people are misdiagnosed giving the whole idea of ADD a bad rap. However, for many people, (especially those who first get diagnosed later in life) the diagnosis of ADD is a godsend, providing a way to recognize those nagging life problems and a way to learn how to constructively deal with them
Actually, if you look carefully, you might find that most common IC's have pin spacings of 0.1 inches, which converts (exactly, as it happens) to 2.54 mm.
So, while you could argue that the layout is metric because there is exactly 2.54 mm spacing between holes, you will make things _much_ easier on yourself if you measure it in inches.
BTW: the 2.54 mm is not an approximation for 0.1", or vice versa. The conversion factor is defined to be _exactly_ 25.4 mm per inch - not the easiest conversion to remember, but is is nice to know that conversions can be done exactly, not just approximated to n decimal places.
Turing machines are actually quite straightforward to build, and have been built on numerous occasions. They aren't terribly practical if what you are looking for is a fast general purpose computing machine, but they can be built to perform any computable function if you are into masochism.
Note: It is of course much easier and faster to build a Turing machine in simulation than out of hardware and real paper tape, but in prinicple there is no difference in what they do. See here for some examples of real Turing machines built for mathematical research into the nature of computing:
http://grail.cba.csuohio.edu/~somos/busy.html
The misconception is that Turing machines actually require an infinite length of tape. What is actually required is an _unbounded_ length of tape, which is easily achieved if you simply allow yourself the freedom to extend your finite length of tape if you ever reach the end.
Any calculation that can actually be computed in a finite amount of time will only use a finite amount of tape. The reason that the tape must be unbounded is that you don't necessarily know beforehand how much tape the computation will take, if it halts at all.
Incidently, this is also the reason we use virtual memory to trick our computers into thinking that they have infinite memory- but that is a topic for another post.
Not quite. Their first studio album (junta) was released in '88, after they had already been around for ~5 years and built a decent local following. After that, the next several albums didn't sell anywhere near the number of copies that where being circulated of live (legally taped and traded) shows. Any serious Phish fan in the early '90s, when they really started to make it big, had a much larger collection of concert tapes than studio albums.
The reason for this is simple- Phish always shined in live concerts; any of their songs sounded better and more exciting played in concert than in a studio- they were just the kind of band that drew a lot of energy from the interaction with the audience. You could always hear the difference in energy between the concert tapes and albums and the studio albums. That is the reason the tapes have always been so sought after, and probably also the reason Phish recognized that it would be best to allow free trading of tapes- it was simply the best way to create a buzz to get people to come to the shows.
I know that I, for one, would never have gone to a Phish show based on any studio albums that I had heard. Listening to concert tapes that friends had collected convinced me, (back in '95) and I've been a fan ever since.
There are quite a number of claims being made here by people who are good at reading spec sheets but not so good at interpereting them.
When you see a driver that is rated for a certain frequency range, the rating assumes that the driver is properly mounted in a cabinet (enclosure) of an appropriate size (if it isn't big enough, the pressure of the enclosed air will act to limit the ability of the driver cone to move back and forth)
When a driver is suspended in free space, the sound waves coming off the back of the driver can cancel the sound waves coming off the from of the driver surface. This is not such a problem at high frequencies, because the sound waves are not long enough to cause any significant cancellation.
I agree with the poster who said that no free-air driver will produce any significant responce below around 300Hz- this corresponds to a wavelength of just over three feet. Even an 18" driver hanging in free air will have its front and back waves concel at lower frequencies. You will get some response, but it will have dropped off dramatically by that point.
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I started to see a psychaitrist last summer because of the exact situation that you are claiming doesn't happen- an inability to focus on the things that I am usually very good at and like to do. Initially my doctor and I suspected depression or anxiety disorder. It was only after a few months that she recognized and started treating me for ADD that I started to feel any improvement- and it came fast.
Not everyone with ADD appears to be lazy. I watch very little TV, I have no video games installed on my computer. Instead I spend long hours working, because I have a job in R&D at a small speaker company that provides me with the opportunity to do things that I would find fun anyway. It's a bitch, however, when for no apparent reason concentration just slips away and you have no control over the distractions around you.
Some people have asked how to address this with their employers. I was lucky- my boss is the owner of the company, and I have found ways to make myself to valuable to lose in spite of my quirks. I had no problem telling my boss- it even helped him to understand how to help me to be more productive. Other people in my company knew that I was having some problems, but nobody ever doubted my work ethic. When I told people in my company that that I had ADD nobody was surprised- they saw it as being a sensible explanation for my well known oddities.
I guess that my point, if there is one, would be that not everyone with a diagnosis of ADD uses it as an excuse for their own laziness. That certainly does happen, and many people are misdiagnosed giving the whole idea of ADD a bad rap. However, for many people, (especially those who first get diagnosed later in life) the diagnosis of ADD is a godsend, providing a way to recognize those nagging life problems and a way to learn how to constructively deal with them
Actually, if you look carefully, you might find that most common IC's have pin spacings of 0.1 inches, which converts (exactly, as it happens) to 2.54 mm. So, while you could argue that the layout is metric because there is exactly 2.54 mm spacing between holes, you will make things _much_ easier on yourself if you measure it in inches.
BTW: the 2.54 mm is not an approximation for 0.1", or vice versa. The conversion factor is defined to be _exactly_ 25.4 mm per inch - not the easiest conversion to remember, but is is nice to know that conversions can be done exactly, not just approximated to n decimal places.
Turing machines are actually quite straightforward to build, and have been built on numerous occasions. They aren't terribly practical if what you are looking for is a fast general purpose computing machine, but they can be built to perform any computable function if you are into masochism.
Note: It is of course much easier and faster to build a Turing machine in simulation than out of hardware and real paper tape, but in prinicple there is no difference in what they do.
See here for some examples of real Turing machines built for mathematical research into the nature of computing:
http://grail.cba.csuohio.edu/~somos/busy.html
The misconception is that Turing machines actually require an infinite length of tape. What is actually required is an _unbounded_ length of tape, which is easily achieved if you simply allow yourself the freedom to extend your finite length of tape if you ever reach the end.
Any calculation that can actually be computed in a finite amount of time will only use a finite amount of tape. The reason that the tape must be unbounded is that you don't necessarily know beforehand how much tape the computation will take, if it halts at all.
Incidently, this is also the reason we use virtual memory to trick our computers into thinking that they have infinite memory- but that is a topic for another post.
Not quite. Their first studio album (junta) was released in '88, after they had already been around for ~5 years and built a decent local following. After that, the next several albums didn't sell anywhere near the number of copies that where being circulated of live (legally taped and traded) shows. Any serious Phish fan in the early '90s, when they really started to make it big, had a much larger collection of concert tapes than studio albums. The reason for this is simple- Phish always shined in live concerts; any of their songs sounded better and more exciting played in concert than in a studio- they were just the kind of band that drew a lot of energy from the interaction with the audience. You could always hear the difference in energy between the concert tapes and albums and the studio albums. That is the reason the tapes have always been so sought after, and probably also the reason Phish recognized that it would be best to allow free trading of tapes- it was simply the best way to create a buzz to get people to come to the shows. I know that I, for one, would never have gone to a Phish show based on any studio albums that I had heard. Listening to concert tapes that friends had collected convinced me, (back in '95) and I've been a fan ever since.
There are quite a number of claims being made here by people who are good at reading spec sheets but not so good at interpereting them.
When you see a driver that is rated for a certain frequency range, the rating assumes that the driver is properly mounted in a cabinet (enclosure) of an appropriate size (if it isn't big enough, the pressure of the enclosed air will act to limit the ability of the driver cone to move back and forth)
When a driver is suspended in free space, the sound waves coming off the back of the driver can cancel the sound waves coming off the from of the driver surface. This is not such a problem at high frequencies, because the sound waves are not long enough to cause any significant cancellation.
I agree with the poster who said that no free-air driver will produce any significant responce below around 300Hz- this corresponds to a wavelength of just over three feet. Even an 18" driver hanging in free air will have its front and back waves concel at lower frequencies. You will get some response, but it will have dropped off dramatically by that point.