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User: lopgok

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  1. My bad. According to http://en.wikipedia.org/wiki/Saturn_V#S-IC_first_stage the first stage uses RP-1 (aka kerosene) and LOX. I thought it used liquid hydrogen.

    As for most exotic and difficult to handle fuel, I think that would include liquid fluorine (FLOX) or nitrogen tetroxide.

  2. "Our Environment. Sure launching a rocket into space take huge amounts of carbon."

    So what takes a large amount of carbon?
    Burning liquid oxygen and hydrogen?
    Manufacturing the liquid oxygen and hydrogen?
    Manufacturing the aluminum?
    Perhaps it takes a lot of *energy*, but I don't know where a huge amount of carbon is involved. Help me out.

  3. Re:I dislike M$ as much as the next guy.... on Google Security Expert Finds, Publicly Discloses Windows Kernel Bug · · Score: 1

    I have no problem with it. He has no responsibility to microsoft, or to anyone who has purchased microsoft software. He did the research on his own time. He owns it, and is responsible only to himself.

    I see nothing inexcusable about it. If you don't like it, you should pay someone to find bugs with the software you use. You can do that, but I bet you don't. If some bugs are found by someone, it sucks to be you. Get the source code and audit it yourself. You do have a microsoft windows source code license, right? If not, whose fault is that?

    I write software. Sometimes I publish it. It is my work. Sometimes I find bugs. I have reported bugs to DEC, prime, microsoft, sun, redhat, fedora, suse, mandriva, mageia, and others. If they listen to me and respond, then I report more bugs. Since microsoft ignores my bug reports, I have stopped sending them bug reports. My choice.

  4. Re: Fired for it? on Google Security Expert Finds, Publicly Discloses Windows Kernel Bug · · Score: 1

    So how was it wrong?

    He did some research.

    He published it.

    Was he under any obligation to show it to google? to microsoft?
    I don't think so.
    This 'protocol' you speak of is just what some people want. That doesn't make it correct, common, or required.
    He has done nothing that should get him fired. If he were, he could sue someone's a$$.
    Get a clue.

  5. Re:But not to give them a chance to correct it fir on Google Security Expert Finds, Publicly Discloses Windows Kernel Bug · · Score: 1

    Is he on microsoft's payroll? If not, why should he inform them? Because they screwed up and didn't find their own bug? He can do whatever he wants to do with his research. He can tell Microsoft. He can post the info. He call sell it to the highest bidder. It is his work. If microsoft really cared, at least they could offer a bug bounty. That would show they are serious about getting bugs out of their software.

  6. Re:Danger. on Brian Krebs Gets SWATted · · Score: 1

    It was a blue pick up truck, not a van, but it certainly was not a nissan titan, nor was it the correct color.

    I suspect that the people who shot up the 2 vehicles, will end up paying a high price, which really means that the people living in the cities will end up paying a high price.

  7. Re:More details on Driver Trapped In Speeding Car At 125 Mph · · Score: 1

    There is no car made that has a more powerful engine than the brakes. What is interesting, is that even if you are going 200kph, have the throttle fully depressed, it only takes about 10-15% longer to stop the car using the brakes. I think that Jay Leno made a car with a monster engine of around 20+ liters that had crappy drum brakes. For that car, I don't think the brakes would stop the car if the throttle was fully depressed. A few years ago, car & drive did a test using a 400+ hp corvette. Stopped just fine. If the brakes are defective, of course all bets are off.

  8. Re:Keep 'em Coming on AMD Introduces New Opterons · · Score: 1

    I heard the high end nvidia cards have ECC on their video memory. They found there were too many errors when doing computation...

  9. Re:Keep 'em Coming on AMD Introduces New Opterons · · Score: 2

    Do your 'workstations' have intel xeon cpus or amd cpus? Otherwise, it is quite unlikely that they have ECC memory, which is pretty much required of real workstations. Real workstations are reliable (and quiet). Just being quiet doesn't count.

  10. Ask Paul Erdos about speed on Do Recreational Drugs Help Programmers? · · Score: 1

    http://en.wikipedia.org/wiki/Paul_Erd%C5%91s "After 1971 he also took amphetamines, despite the concern of his friends, one of whom (Ron Graham) bet him $500 that he could not stop taking the drug for a month.[34] Erds won the bet, but complained that during his abstinence mathematics had been set back by a month: "Before, when I looked at a piece of blank paper my mind was filled with ideas. Now all I see is a blank piece of paper." After he won the bet, he promptly resumed his amphetamine use."

  11. Re:Here's the problem... on AMD FX-8350 Review: Does Piledriver Fix Bulldozer's Flaws? · · Score: 5, Informative

    By rare, you mean all Asus motherboards. You have heard of Asus? I presume they are in the consumer space? Look at any AM3+ motherboard, or even AM3 or AM2+. All of them support ECC.

  12. Re:Practical? on A Honda Civic With no Gas Tank (Video) · · Score: 1

    I am not sure what you mean by 'comically thirsty'. Mine usually gets 60 miles per gallon. The worst mileage I got was when I drove in the desert when it was well over 100 degrees F, and I was driving 80mph. I got about 48 miles per gallon. I suppose there are some turbo diesels that get better mpg, but they are not sold in my country. I think you are a bit confused.

  13. Re:2003 Nissan Pathfinder Conversion on A Honda Civic With no Gas Tank (Video) · · Score: 1

    Your custom solar panel produces 600w? Where? In outer space? I have 200w panels, and I don't think 2 would fit on top of a pathfinder. And mine are 18% efficient at the panel level, which is pretty efficient. Perhaps if you use multi-junction space grade cells, you could get 600w, but that would cost more than a new pathfinder.

  14. Re:People who don't believe in heroes... on Astronaut Neil Armstrong Has Died · · Score: 1

    That is because Neil Armstrong was being interviewed by Sir Patrick Moore https://en.wikipedia.org/wiki/Patrick_Moore Moore is a pretty famous amateur astronomer, who is quite well educated in astronomy. Sorta analogous to Carl Sagan.

    If you had a contemporary interviewer of similar stature fo Moore, I suspect they would ask similar questions.

    The only question is would it air on prime time TV. In my opinion, British TV is generally far more scholarly than US television.

  15. Re:No safe on-site storage on Ask Slashdot: Best On-Site Backup Plan? · · Score: 1

    I am not sure what an 'expensive expensive' gun safe is, but the gun safes i have seen that weigh 500 come from costco or sams club and are not expensive. It is hard to imagine a house fire hot enough to melt steel. Even 9-11 only partially melted the steel structure. You would think a large steel box should be easy to spot after a fire...

  16. Re:The Volt is still a flop on Chevy Volt To Resume Production One Week Early Following Record Sales · · Score: 1

    I don't know what year you live in, but toyota does sell a pluggable prius. I will have mine this month.

  17. Re:Help Find This Story on Ask Slashdot: Good, Forgotten Fantasy & Science Fiction Novels? · · Score: 1

    Pretty sure it was written by Isaac Asimov

  18. Open source file based deduplication on Ask Slashdot: Free/Open Deduplication Software? · · Score: 1

    It is trivial. I wrote a python script to do it. It is licenced under gpl 3. It uses hard links, and I run it every time I backup a significant amount of data to my 10tb fileserver. As it uses hard links, it is designed for storing backup data, not for general usage. It can be found at http://jdeifik.com/ under 'Disk deduplicator'

  19. Re:Anything over 2TB should be ZFS... on Build Your Own 135TB RAID6 Storage Pod For $7,384 · · Score: 1

    You say you checksum EVERYTHING. I wonder what type of intel i3 processor supports ECC? From what I know, only intel xeon processors support ECC. Of course all amd processors support ECC and many cheap amd compatible motherboards do also. I bought a 3 core amd processor, a motherboard and 4gb of ECC ram for under $200, over a year ago. How reliable can a huge disk array be without ECC memory for the cpu?

  20. Re:That's uncharitable on Tesla Signs $60 Million Contract With Toyota · · Score: 1

    Perhaps the AC Propulsion parts are expensive. That is what happens when you build in quantities of 1 to 10 at a time. Perhaps they aren't identical. Again, they don't do large scale manufacturing. I have driven most of their cars, starting with the Honda CRX, forward, except the E-box and the t-zero (though I have ridden in it). They have been building electric cars for close to 20 years. They have invented siginficant techonolgy. Has tesla? It is a stretched lotus with a modified AC Propulsion drivetrain. It is well marketed and financed. BTW, you get much better regenerative braking when you use front wheel drive, though perhaps less sports car performance.

  21. Re:That's uncharitable on Tesla Signs $60 Million Contract With Toyota · · Score: 1

    Why license the technology from tesla when the motor and motor controller tech is based on the AC Propulsion design?

  22. File based disk deduplication is trivial on Data Deduplication Comparative Review · · Score: 1

    I wrote a simple python program that does file based disk de-duplication. It will work anywhere python runs as long as the filesystem supports hard links.

    It is available under gpl at: http://jdeifik.com/

    With the hardware solutions in the article, prices start at $25k or so, and you are beholden to the hardware vendor. Doing it in software will work with any reasonable OS, any reasonable filesystem, and any hardware. Sure, block based de-duplication is more efficient, but it is filesystem specific, and right now ZFS is the only somewhat reasonable filesystem that supports it.

  23. Re:worst article ever on Ray Kurzweil Does Not Understand the Brain · · Score: 1

    I think you are clueless when you say "Generally his ideas aren't taken very seriously by academia in Computer Science".
    Lets list what he invented:
    Decent optical character recognition.
    Text to speech synthesis.
    Speech recognition.
    CCD flatbed scanner.
    High quality music synthesizers.

    All of these inventions were quite innovative, commercial successful, and revolutionized the ideas of what AI was. I think any real computer scientist would take these quite seriously.

  24. Perhaps you are unaware of Brian Reed's skills on At Google, You're Old and Gray At 40 · · Score: 4, Informative

    He got a PHD from CMU in CS, which is likely the best college for CS.

    He invented the scribe text formatting language.

    He invented the router, which became the first cisco router.

    He co-founded what eventually became Adobe.

    While at DEC, he and his group invented the altavista search engine.

    There is more, but he clearly has serious computer science talents and vision.

  25. Re:Love the space program on NASA Satellite Looks For Response From Dead Mars Craft · · Score: 2, Informative

    I am a tiny bit off on the timeline. The motto was 'Mars by 1965, Saturn by 1970'. See http://www.islandone.org/Propulsion/ProjectOrion.html