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Comment Re:"using a lot more fossil fuels than they save"? (Score 2, Interesting) 685

by djarum72 (#26274533) Attached to: Why LEDs Don't Beat CFLs Even Though They Should

The energy payback is within the first hour of use.

I figure you can fit in ~300000 CFL bulbs in a container.

http://www.google.com/search?q=12022mm+*+2352+mm+*+2395+mm+%2F+(1.7in+*+1.7in+*+4.4in)&btnG=Search

Wikipedia says it takes 85MW to bring a certain class of container ship up to speed.

http://en.wikipedia.org/wiki/Container_ship

One limit on ship size is the "Suezmax" standard, or the largest theoretical ship capable of passing through the Suez Canal, which measures 14,000 TEU. Such a vessel would displace 137,000 metric tons deadweight (DWT), be 400 meters long, more than 50 meters wide, have a draft of nearly 15 metres, and use more than 85 MW (113,987hp) to achieve 25.5 knots,

Which works out to 1/50th of a watt per bulb. Thats such a small number, trying to calculate the cruising energy seems fruitless...

http://www.google.com/search?q=85MW+%2F+14000+%2F+300000
Books

Tools & Surprises For a Tech Book Author? 325

Posted by kdawson from the chisel-and-clay-tablet dept.
Fubari writes "I have questions for those of you who have written books: what writing tools have you found helpful? I want to start my book off right (so I'm pretty sure I don't want to write it in MS Word). What has and has not worked well for you? So far I have thought of needs like chapter/section management, easy references to figures (charts, diagrams, source code), version control (check in/check out parts like chapters, figures, etc.), and index generation. I would also welcome advice about what I don't know enough to ask about. Did you encounter any surprises that you wish you had known about back when you started out?"
Image

Programming .NET 3.5 224

Posted by samzenpus
lamaditx writes "The world of the .NET framework is taken to the next level by the release of .NET 3.5. The intended audience of this book are experienced .NET programmers. There are no sections that tell you details about C#, SQL servers or anything like that. I don't recommend this book if you never worked on a .NET project and don't know how to set up a SQL database. You should be aware that the code is written in C#. You might use one of the software code converters if you prefer Visual Basic instead. I think the code is still readable even if you do not know C#. I appreciate the fact that the authors decided to use one language only because it keeps the book smaller. The authors assume you are using Visual Studio 2008. You don't necessarily need to update to 2008 if you are working with an older edition because you can use the free Express Edition to get started." Keep reading for the rest of Adrian's review.
Classic Games (Games)

10th Year of the International Nethack Tournament 170

Posted by Soulskill from the why-did-this-potion-eat-my-legs dept.
Dr. Zowie writes "The 10th annual Nethack Tournament just started over at nethack.devnull.net, so put on your Hawaiian shirt, grab an expensive camera, and head for the dungeon. The tourney runs through the month of November each year, with volunteer game servers dotted around the world. Fewer than 1% of contestants actually finish the game by retrieving the Amulet of Yendor and ascending to demigodhood, but take heart: there are many prizes for intermediate goals, and prizes for team effort. For those too young to remember games older than Halo, Nethack is the apotheosis of the Roguelike genre of role-playing games, rendered in ASCII. Gameplay is phenomenally complex, and the game is somewhat sadistic; there are no 'checkpoints,' so if you manage to kill yourself somewhere in the dungeon you must start over from the beginning. The dungeons are quasi-randomly generated, so every game is different."
Businesses

After Domain Squatting, Twitter Squatting 201

Posted by timothy from the kept-in-a-special-safe dept.
carusoj writes "Squatting on domain names is nothing new, but Twitter has created a new opportunity for squatters, in the form of Twitter IDs. Writes Richard Stiennon: 'Is there evidence of Twitter squatting (squitting?) Let's check. Yup, every single-letter TwitID is taken ... How about common words? Garage, wow, war, warcraft, Crisco, Coke, Pepsi, Nike, and Chevrolet are all taken. My guess is that Twitter squatters have grabbed all of these in the hopes that they will be worth selling in the not too distant future. Of course the legitimate holders of brands can sue for them and Twitter can just turn them over if asked. But, because the investment and risk for the squatter is zero, you are going to see the rapid evaporation of available Twitter IDs.'"
Image

The IDA Pro Book 85

Posted by samzenpus from the read-all-about-it dept.
An anonymous reader writes "After attending DEFCON in August and seeing the overwhelming interest in this book, I was eager to dive into The IDA Pro Book by Chris Eagle. Chris Eagle's team, School of Root, won the 'Capture the Flag' event at DEFCON this year and Chris gave a presentation on CollabREate, a tool that integrates with IDA Pro to allow collaboration in reverse engineering (RE). All of that — together with the fact that the book sold out — screamed that this book should quickly make it to the top of my list." This review originally appeared on The Ethical Hacker Network.
Transportation

Appropriate Tech, 300mpg Car Top 2008 Innovators 155

Posted by timothy from the name-your-own-runners-up dept.
longacre writes "While some giggles were floating around about the irony of a Microsoft product (Photosynth) finding itself on the same top 10 products list as a toilet, the true stars of last night's annual Popular Mechanics Breakthrough Awards were innovations of far more consequence. MIT professor Amy B. Smith won the marquis Leadership Award for her work on building simple, low-cost technology to help developing countries. Joining Smith from the appropriate technology field were a group of CalTech students who created all-terrain wheelchairs for the disabled, and a Procter & Gamble exec who developed a water purifying powder for the third world. Aptera Vehicles founders Steve Ambro and Chris Anthony made the cut for their 300mpg Typ-1e, which is expected to hit showrooms by the end of this year. Other winners ranged from the Mars Phoenix Lander team, to the developers of a low-cost cancer test, to the creators of Spore."
Christmas Cheer

The Best Of What's New 2007 66

Posted by Zonk from the can't-believe-the-year's-almost-over dept.
BlaineZilla pointed us to one of the earliest annual 'best of' roundups: Popular Science's Best of What's New awards. The winner this year is a nanosolar powersheet that may someday change the way we think about renewable energy. Other winners include the corot satellite, a project aimed at searching out habitable planets in other solar systems, and the world's most advanced bionic hand.
Moon

Submission + - Vote to Eliminate Leap Seconds 6

Submitted by Mortimer.CA
Mortimer.CA writes: As mentionted on Slahdot previously, there is a proposal to remove leap seconds from UTC (nee 'Greenwich' time). It wil be put to a vote to ITU member states, and if 70% agree, the leap second will be eliminated by 2013. There is some debate as to whether this change is a good or bad idea. One philosophical point opponents make is that the 'official' time on Earth should match the time of the sun and heavens. People with appliances that blink '12:00' can probably ignore this issue.
Security

Submission + - VM-based rootkits proved easily detectable (stanford.edu)

Submitted by paleshadows
paleshadows writes: A year and a half has passed since SubVirt, the first VMM (virtual machine monitor) based rootkit, was introduced. The idea spawned two lively slashdot discussions: the first, which followed the initial report about SubVirt, and the second, which was conducted after Joanna Rutkowska has recycled the idea (apparently without giving credit to the initial authors). Conversely, in this year's HotOS workshop, researchers from Stanford, CMU, VMware, and XenSource have published a paper titled " Compatibility Is Not Transparency: VMM Detection Myths and Realities" which shows that VMM-based rootkits are actually easily detectable. The introduction of the paper explains that

"While commodity VMMs conform to the PC architecture, virtual implementations of this architecture differ substantially from physical implementations. These differences are not incidental: performance demands and practical engineering limitations necessitate divergences (sometimes radical ones) from native hardware, both in semantics and performance. Consequently, we believe the potential for preventing VMM detection under close scrutiny is illusory — and fundamentally in conflict with the technical limitations of virtualized platforms."

The paper concludes by saying that

"Perhaps the most concise argument against the utility of VMBRs (VM-based rootkits) is: "Why bother?" VMBRs change the malware defender's problem from a very difficult one (discovering whether the trusted computing base of a system has been compromised), to the much easier problem of detecting a VMM."
Power

Submission + - Driving on starch?

Submitted by
Roland Piquepaille
Roland Piquepaille writes: "Using sugar contained in corn or potatoes to build hydrogen-powered fuel cells has already been done. But now, a team of U.S. researchers has developed a new sugar-to-hydrogen technology. Why not put the starch inside the tank of your car? With the help of 13 specific enzymes, "a car with an approximately 12-gallon tank could hold 27 kilograms (kg) of starch, which is the equivalent of 4 kg of hydrogen. The range would be more than 300 miles, estimates one of the researchers. One kg of starch will produce the same energy output as 1.12 kg (0.38 gallons) of gasoline." The beauty behind this idea is that no special infrastructure would be needed. Starch could be distributed by your local grocery store. Here is a link to many additional references."

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Real Programmers don't write in FORTRAN. FORTRAN is for pipe stress freaks and crystallography weenies. FORTRAN is for wimp engineers who wear white socks.

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