Part of being a surgeon is having lots of practice at what you do. The more out of practice you are, the higher the chances something can go wrong. Men don't make better surgeons than women, but experience plays a key role in determining the success (and liability) of an operation.
384 VDC is a common voltage used in "Boost" regulators that are universal input. That's probably why that voltage was used. You obviously can't power a microprocessor off of a 384V line (SiC would be necessary to withstand the high voltage). There has to be some sort of switching going on.
I have not RTFA, but what would make sense to me would be to use a boost converter to get 384V, send that 384V all around the building, then convert it down to 12V, 5V, 3.3V, and 1.2V using a few large DC-DC converters. Most enterprise computer power supplies have a PFC boost converter already, so doing all that in one massive stage would save space inside the PSUs and improve efficiency (although the current Boost converters are generally 90%+ efficient).
12VDC and 5VDC would easily cook a modern microprocessor. I guess it's a question of doing the PFC boost for everything at the start, or breaking it up into tiny sections (as is already the case). Safety shouldn't be a big issue, and you need the 384V to supply enough power to all your DC-DC converters. To get the same power with lower voltages you'd need to use expensive superconductors.
People are always thinking of the children, but what about Little Richard?
Re:Intel's 3g gate transistors stop all current
on
The Transistor Wars
·
· Score: 4, Informative
I think the point they're trying to make is that there's some sort of depletion going in the channel, which causes a very small, but not insignificant amount of current to flow from drain to source through the transition region in the substrate. From the standpoint that electrons are sitting on the upper part of the Si substrate underneath the channel, the summary makes sense. They want to remove the excess Si so that depletion mode current is more tightly controlled.
I know a particular professor who did this teaching sophomore-level Java programming. Unfortunately, I was not at the lecture and heard about it later. All I'll say is that we're a big engineering school in a midwestern state.
Having had an instructor from the Georgia Tech system, your story does not surprise me at all, as that is exactly what he did in one of my classes. I don't know if it's entirely the institution's fault, but certain instructors take that attitude, and the honest people get punished as a result. It pays NOT to be honest.
Having been an "unofficial" TA for EE and and official one for Comp Sci classes, I can tell you that going to the professor is exactly what to do.//begin rant I once turned in a physics paper that I had done in Adobe InDesign because it required so many charts, graphs, math notation, etc. and the TA in our recitation ask me to stay after class and talk to him about my homework. In no uncertain terms he told me I cheated on the paper, even though no one had ever turned in the same paper. He was just freaked out because I could typeset. God help him if he gets a student who writes reports in TeX... but I digress.
For anyone in the situation where you did not cheat and a TA is accusing that you did, send an email directly to the professor in charge of the class. Get your complaint in writing. As for me, the TA was suitably chastised by the major professor in charge of the class, he hated my guts, and he graded my papers much lower than they should have been. All I could say to the professor at the end of the class was, "**** is doing X, please talk to **** so that he doesn't screw up again."
On to other matters, when I was a comp sci TA, I caught two people who uploaded identical assignments on our web-based submission system. I would have never known there was anything wrong, but that one of the kids forgot to change the name written in the comments to his own. He got a zero on the assignment and had to write an apology letter. Since I was doing this TA'ing at the same time as my Physics class, I knew to go directly to the professor instead of trying stroke my ego. It worked out fine.
Solution manuals are another thing that people have. I'd say that 90% of the class gets the answers from their homeworks in one way or another from a solution manual, if only because they are copying off of a friend's homework, and their friend used the solution manual. In classes where instructors write their own homeworks, this isn't a problem.
But there was a very specific Power Systems class, where most of the students were foreign and the class fell along that normal ~90% distribution. I, and a friend of mine, didn't use the solution manual for that class and, as a result, we got lower grades on our homeworks. The people with the solution manuals would turn in perfect homeworks and the instructor would think that he's got a group of really smart kids this semester (like every other semester) and that my friend and I were delinquents who didn't understand the material and weren't trying in his class. Of course, the final was 40% of the grade in that class, and karma caught up to the people who didn't know their shit. But I still wonder what would have happened if I had the solutions, used them constructively to do my homework assignments, and got good grades on my homework, and did well on the final. That's probably the difference between an A/A- and a B/B-.
If an instructor doesn't realize that kids who takes their classes know about the stakes, especially from people who come from societies where anything less than perfect is considered garbage, he or she is deluding themselves.//end rant
I've noticed several posts mention Xerox PARC as the creators of the GUI.
That is absolutely true, but it took a visionary like Steve Jobs to figure out that such a technology could revolutionize computing. PARC and Jobs were BOTH essential vessels. After seeing the technology, Apple bought the rights to the mouse interface from Xerox, and introduced the Mac.
Xerox never saw the vast impact their technology could have. Where would we be now if Xerox had just sat on or canceled that project?
I bought the Hitachi drive listed in the article, and it does fairly well performance wise. However, the clunker is loud, takes a long time to spin up, and generally makes too much heat/noise. I've owned some Seagate Cheetah 15K.3's in the past and this hard drive is as loud as them, and takes as long to spin up.
I am actually ordering a new WD Green 3TB drive from Amazon in the hopes that a lower spindle speed and power consumption will translate into less noise. I run a SSD for my main boot drive and applications and use the 3TB drives to do backups and store misc. files, so I'm not wanting for super high performance. If you're used to a HDD, then the Hitachi is a good choice for a boot drive, but don't get the drive for its acoustics.
As some people have already said in the comments on CNet, this entire story may be made up, as the only citation for the phone being lost–and searched for–is an unknown source. The SFPD never received a request from Apple to get the phone, as is noted in the article; however, the unknown source tells us that SFPD did search a house in the SF area. I have a hard time believing this story because of a lack of specific information about the phone itself.
The conclusion? CNet page views. Mission Accomplished.
I can guarantee you that if Samsung was shipping a vast majority of Windows Mobile Phones, and not Google Android phones, the reaction on/. would be a lot different.
You should hope Apple wins this case, however much you hate them, as Android (which I assume you like) would be negatively impacted by the precedent set by the case (if Apple is found liable).
Unfortunately, you are right. I remember back to the days when an Apple story was pudge announcing a new version of iTunes, iMovie, or an incremental update in Mac OS X. Most of the hate was directed at Microsoft. Slashdot was quaint back then, and you could expect intelligent discussion.
Now I'm seeing most of the hate being directed at Apple specifically by Google fanboys. I think a lot of the apple fanboys left slashdot entirely when the environment started to get hostile to them. Browsing at -1 is necessary just because people get downmodded for even being inferred as a fanboy for apple or microsoft.
I am saddened by what slashdot has become. I guess it proves that fanboys from one group are really no different than fanboys from another group, except for the company/entity they root for. Honestly, I think it's a particular type of personality that does that.
Ok fanboys of all faiths, you can mod me down, but please get off my lawn.
Last year my wife was suffering from some anxiety during her pregnancy. An internal medicine doctor prescribed an anti-psychosis drug to treat bipolar disorder. The list of side effects included just about everything you wouldn't want to happen to a pregnant women. What would a drug like this do to an unborn child, let alone an adult!
That's really shady business--your internist prescribed drugs s/he is not qualified to prescribe. They should have sent you to a psychiatrist. If what you said is true, complaining to the right people could get this person in a whole lot of trouble.
I don't see anything legally, ethically or morally wrong with what he did. In fact, I hope he sues the bejeezus out of the thugs who broke into his house and stole his equipment.
You are part of what is wrong with America. Litigation is not the answer to every grievance.
FYI, most economical solar panels are produced with screen printing. A liquid (metalloid) paste is pushed through a screen onto a wafer of doped Si and baked in an oven to solidify the paste. A great article on screen printing for solar cells can be found here:
These researchers will have to come up with much better than 5% efficiency if they want to compete with mass market solar panels. In other words, this is a great PhD dissertation, but lots of work needs to be done to refine the procedure in order to be competitive in the marketplace.
Slashdot Mirror
Part of being a surgeon is having lots of practice at what you do. The more out of practice you are, the higher the chances something can go wrong. Men don't make better surgeons than women, but experience plays a key role in determining the success (and liability) of an operation.
Hell, people can't tell the difference between Funny and Insightful, either.
We require more minerals!
384 VDC is a common voltage used in "Boost" regulators that are universal input. That's probably why that voltage was used. You obviously can't power a microprocessor off of a 384V line (SiC would be necessary to withstand the high voltage). There has to be some sort of switching going on.
I have not RTFA, but what would make sense to me would be to use a boost converter to get 384V, send that 384V all around the building, then convert it down to 12V, 5V, 3.3V, and 1.2V using a few large DC-DC converters. Most enterprise computer power supplies have a PFC boost converter already, so doing all that in one massive stage would save space inside the PSUs and improve efficiency (although the current Boost converters are generally 90%+ efficient).
12VDC and 5VDC would easily cook a modern microprocessor. I guess it's a question of doing the PFC boost for everything at the start, or breaking it up into tiny sections (as is already the case). Safety shouldn't be a big issue, and you need the 384V to supply enough power to all your DC-DC converters. To get the same power with lower voltages you'd need to use expensive superconductors.
Please mod parent up
PETA.xxx (People for the Erotic Treatment of Animals)
People are always thinking of the children, but what about Little Richard?
I think the point they're trying to make is that there's some sort of depletion going in the channel, which causes a very small, but not insignificant amount of current to flow from drain to source through the transition region in the substrate. From the standpoint that electrons are sitting on the upper part of the Si substrate underneath the channel, the summary makes sense. They want to remove the excess Si so that depletion mode current is more tightly controlled.
I know a particular professor who did this teaching sophomore-level Java programming. Unfortunately, I was not at the lecture and heard about it later. All I'll say is that we're a big engineering school in a midwestern state.
Having had an instructor from the Georgia Tech system, your story does not surprise me at all, as that is exactly what he did in one of my classes. I don't know if it's entirely the institution's fault, but certain instructors take that attitude, and the honest people get punished as a result. It pays NOT to be honest.
^^this
Having been an "unofficial" TA for EE and and official one for Comp Sci classes, I can tell you that going to the professor is exactly what to do. //begin rant
I once turned in a physics paper that I had done in Adobe InDesign because it required so many charts, graphs, math notation, etc. and the TA in our recitation ask me to stay after class and talk to him about my homework. In no uncertain terms he told me I cheated on the paper, even though no one had ever turned in the same paper. He was just freaked out because I could typeset. God help him if he gets a student who writes reports in TeX... but I digress.
For anyone in the situation where you did not cheat and a TA is accusing that you did, send an email directly to the professor in charge of the class. Get your complaint in writing. As for me, the TA was suitably chastised by the major professor in charge of the class, he hated my guts, and he graded my papers much lower than they should have been. All I could say to the professor at the end of the class was, "**** is doing X, please talk to **** so that he doesn't screw up again."
On to other matters, when I was a comp sci TA, I caught two people who uploaded identical assignments on our web-based submission system. I would have never known there was anything wrong, but that one of the kids forgot to change the name written in the comments to his own. He got a zero on the assignment and had to write an apology letter. Since I was doing this TA'ing at the same time as my Physics class, I knew to go directly to the professor instead of trying stroke my ego. It worked out fine.
Solution manuals are another thing that people have. I'd say that 90% of the class gets the answers from their homeworks in one way or another from a solution manual, if only because they are copying off of a friend's homework, and their friend used the solution manual. In classes where instructors write their own homeworks, this isn't a problem.
But there was a very specific Power Systems class, where most of the students were foreign and the class fell along that normal ~90% distribution. I, and a friend of mine, didn't use the solution manual for that class and, as a result, we got lower grades on our homeworks. The people with the solution manuals would turn in perfect homeworks and the instructor would think that he's got a group of really smart kids this semester (like every other semester) and that my friend and I were delinquents who didn't understand the material and weren't trying in his class. Of course, the final was 40% of the grade in that class, and karma caught up to the people who didn't know their shit. But I still wonder what would have happened if I had the solutions, used them constructively to do my homework assignments, and got good grades on my homework, and did well on the final. That's probably the difference between an A/A- and a B/B-.
If an instructor doesn't realize that kids who takes their classes know about the stakes, especially from people who come from societies where anything less than perfect is considered garbage, he or she is deluding themselves. //end rant
And that Palm copied from Mac OS, which presumably copied it from Xerox?
Xerox copied from itself :P
I commented on this just a moment ago. It's a great insight. Mods, please mod parent up.
I've noticed several posts mention Xerox PARC as the creators of the GUI.
That is absolutely true, but it took a visionary like Steve Jobs to figure out that such a technology could revolutionize computing. PARC and Jobs were BOTH essential vessels. After seeing the technology, Apple bought the rights to the mouse interface from Xerox, and introduced the Mac.
Xerox never saw the vast impact their technology could have. Where would we be now if Xerox had just sat on or canceled that project?
So in other words, we have large corporations vs. organized crime. I fail to see how Kapersky and Microsoft lose.
I bought the Hitachi drive listed in the article, and it does fairly well performance wise. However, the clunker is loud, takes a long time to spin up, and generally makes too much heat/noise. I've owned some Seagate Cheetah 15K.3's in the past and this hard drive is as loud as them, and takes as long to spin up.
I am actually ordering a new WD Green 3TB drive from Amazon in the hopes that a lower spindle speed and power consumption will translate into less noise. I run a SSD for my main boot drive and applications and use the 3TB drives to do backups and store misc. files, so I'm not wanting for super high performance. If you're used to a HDD, then the Hitachi is a good choice for a boot drive, but don't get the drive for its acoustics.
As some people have already said in the comments on CNet, this entire story may be made up, as the only citation for the phone being lost–and searched for–is an unknown source. The SFPD never received a request from Apple to get the phone, as is noted in the article; however, the unknown source tells us that SFPD did search a house in the SF area. I have a hard time believing this story because of a lack of specific information about the phone itself.
The conclusion? CNet page views. Mission Accomplished.
I can guarantee you that if Samsung was shipping a vast majority of Windows Mobile Phones, and not Google Android phones, the reaction on /. would be a lot different.
You should hope Apple wins this case, however much you hate them, as Android (which I assume you like) would be negatively impacted by the precedent set by the case (if Apple is found liable).
Holy shit /. has fallen.
Unfortunately, you are right. I remember back to the days when an Apple story was pudge announcing a new version of iTunes, iMovie, or an incremental update in Mac OS X. Most of the hate was directed at Microsoft. Slashdot was quaint back then, and you could expect intelligent discussion.
Now I'm seeing most of the hate being directed at Apple specifically by Google fanboys. I think a lot of the apple fanboys left slashdot entirely when the environment started to get hostile to them. Browsing at -1 is necessary just because people get downmodded for even being inferred as a fanboy for apple or microsoft.
I am saddened by what slashdot has become. I guess it proves that fanboys from one group are really no different than fanboys from another group, except for the company/entity they root for. Honestly, I think it's a particular type of personality that does that.
Ok fanboys of all faiths, you can mod me down, but please get off my lawn.
Do you think we could touch base about this?
Last year my wife was suffering from some anxiety during her pregnancy. An internal medicine doctor prescribed an anti-psychosis drug to treat bipolar disorder. The list of side effects included just about everything you wouldn't want to happen to a pregnant women. What would a drug like this do to an unborn child, let alone an adult!
That's really shady business--your internist prescribed drugs s/he is not qualified to prescribe. They should have sent you to a psychiatrist. If what you said is true, complaining to the right people could get this person in a whole lot of trouble.
I don't see anything legally, ethically or morally wrong with what he did. In fact, I hope he sues the bejeezus out of the thugs who broke into his house and stole his equipment.
You are part of what is wrong with America. Litigation is not the answer to every grievance.
FYI, most economical solar panels are produced with screen printing. A liquid (metalloid) paste is pushed through a screen onto a wafer of doped Si and baked in an oven to solidify the paste. A great article on screen printing for solar cells can be found here:
http://www.appliedmaterials.com/sites/default/files/Screen_Printing_Backgrounder_0.pdf
These researchers will have to come up with much better than 5% efficiency if they want to compete with mass market solar panels. In other words, this is a great PhD dissertation, but lots of work needs to be done to refine the procedure in order to be competitive in the marketplace.
They're not French, they're Quebecois!