Anita Kuno writes "I suggested Head First Rails to a friend before I even finished it. He was asking me questions that I didn't have time to answer, and I knew the book could explain better than I. My friend is impatient, and I was uncertain what his experience would be. At first he was frustrated, but I assured him the answers were in the book. The incremental style of Head First Rails includes some exercises that are designed to fail to reinforce the learning process. I was confident that his answer would be found in the pages and he trusted me enough to go back and continue the exercises. He later told me he is very happy with the book and grateful that I suggested it." Read on for the rest of Anita's review.

Al Benedetto writes "I stumbled across this article which analyzes the YouTube audio content identification system in-depth. Apparently, since YouTube's system has no transparency, the behaviors had to be determined based on dozens of trial-and-error video uploads. The author tries things like speed/pitch adjustment, the addition of background noise, as well as other audio tweaks to determine exactly what you'd need to adjust before the fingerprinter started mis-identifying material. From the article: 'When I muted the beginning of the song up until 0:30 (leaving the rest to play) the fingerprinter missed it. When I kept the beginning up until 0:30 and muted everything from 0:30 to the end, the fingerprinter caught it. That indicates that the content database only knows about something in the first 30 seconds of the song. As long as you cut that part off, you can theoretically use the remainder of the song without being detected. I don't know if all samples in the content database suffer from similar weaknesses, but it's something that merits further research.'"

FathomIT sends in a NY Times profile of Shai Agassi, owner of a company named Better Place, who is working to build the infrastructure to support large numbers of small-scale charging spots for electric cars, as well as fast, automated battery swap stations. "The robot — a squat platform that moves on four dinner-plate-size white wheels — scuttled back and forth along a 20-foot-long set of metal rails. At one end of the rails, a huge blue battery, the size of a large suitcase, sat suspended in a frame. As we watched, the robot zipped up to the battery, made a nearly inaudible click, and pulled the battery downward. It ferried the battery over to the other end of the rails, dropped it off, picked up a new battery, hissed back over to the frame and, in one deft movement, snapped the new battery in the place of the old one. The total time: 45 seconds."

lawpoop writes "At my current workplace, I'm tasked with creating a rather complicated and metastasizing web-database application. I've mostly been the sole 'IT guy' at my workplaces in the past, so I've never had to, nor taken the time, to learn proper project management routines — code comments mostly got me through it. Now for this project, it's getting somewhat hairy and I'm sensing that I need to start doing things in a more organized manner. What resources would you direct me to? Books? (I wouldn't mind buying one good one.) Websites? What do proper 'specs' look like? Must I use UML (seems complicated and unintuitive) or a simpler ER diagram? For this job, I just need to provide better estimates for completing features, but what will I need if/when I would be working with a team?"

maxheadroom writes "Google has released an open source browser plugin that provides a JavaScript API for displaying 3D graphics in web content. Google hopes that the project will promote experimentation and help advance a collaborative effort with the Khronos Group and Mozilla to create open standards for 3D on the web. Google's plugin offers its own retained-mode graphics API, called O3D, which takes a different approach from a similar browser plugin created by Mozilla. Google's plugin is cross-platform compatible and works with several browsers. In an interview with Ars Technica, Google product manager Henry Bridge and engineering director Matt Papakipos say that Google's API will eventually converge with Mozilla's as the technology matures. The search giant hopes to bring programs like SketchUp and Google Earth to the browser space."

Jyms writes "As technology changes, so hubs routers and switches are upgraded, but does the cabling need replacing, and if so, how often? Coax gave way to CAT 5 and CAT 5e replaced that. If you are running a 100Mbit/s network on old CAT 5, can that affect performance? Do CAT 5(e) cables get old?"

jammag writes "Cranking out code — your very best code — requires being in the optimal environment, muses developer Eric Spiegel. He explores the pitfalls and joys of the usual locales, cubicle, home, the beach. He claims he's done his best coding on an airplane. In the end, though, he suggests that the best environment is a matter of the environment inside yourself, your internal mood — and to hell with the cubicle or wherever. You have to be focused on quality, regardless of the idiot clients. It's all inside your mind. Where's your coding happy place?"

Slashdot regular Bennett Haselton writes "The ACLU has targeted a group of Tennessee school districts for blocking websites categorized by a blocking company as 'LGBT.' I hope the ACLU wins, but it may create the mistaken impression that egregious overblocking of websites is easy to fix. On the contrary, the vast majority of errors are hard-coded into the products and cannot be fixed by unblocking a single category." Hit that tantalizingly entitled 'Read More' link to read his essay.

travalas writes "Last year I moved to Rural Bangladesh. My work is pretty diverse, everything from hacking web apps to designing building materials. Increasingly a Linux VM on my MacBook Pro is insufficient due to storage speed/processing constraints and the desire to interface more easily with some sensor packages. There are a few issues that make that make a standard server less than desirable. This server will generally not be running with any sort of climate control and it may need to move to different locations so would also be helpful if it was somewhat portable. The environment here is hot, humid and dusty and brutal on technology and power is very inconsistent so it will often be on a combination of Interruptible Power Supply and solar power. So a UPS is a must and low power consumption desirable, so it strikes me that an Integrated UPS a la Google's servers would be handy. Spec wise it needs to be it needs to be able to handle several VM's and some other processor storage intensive tasks. So 4 cores, 8GB of ram and 3-4 TB of SATA storage seems like a place to start for processing specs. What sort of hardware would you recommend without breaking the bank?"

CWmike writes "Microsoft will deliver a release candidate of Windows 7 in about two weeks, the company's Web site revealed Saturday. According to a page posted on Microsoft's partner program site, Windows 7 Release Candidate (RC) may be available to paying subscribers to Microsoft's developer and IT services before May 5. Partners will be allowed to download the release candidate on that date, the first Tuesday of the month. 'Partners: If you have a subscription to MSDN or TechNet, you can download Windows 7 RC now,' the page read Saturday afternoon. 'Otherwise, you can download Windows 7 RC starting May 5, 2009.' The link to the download, however, shunted users to the TechNet download page, which did not list Windows 7 RC as one of the available files. This is the second time in just over three weeks that Microsoft's Web site has leaked information about Windows 7 RC. Accidental, or buzz-builder?"

Jamyang (Greg Walton) writes "I am editor of the Infowar Monitor and co-author of the recent report, Tracking Ghostnet. I have been asked by the Office of His Holiness, the Dalai Lama (OHHDL) and the Tibetan Government in Exile (TGIE) to offer some policy recommendations in light of the ongoing targeted malware attacks directed at the Tibetan community worldwide. Some of the recommendations are relatively straightforward. For example, I will suggest that OHHDL convene an international Board of Advisers, bringing together some of the brightest minds in computer and international security to advise the Tibetans, and that the new Tibetan university stands up a Certified Ethical Hacking course. However, one of the more controversial moves being actively debated by Tibetans on the Dharamsala IT Group [DITG] list, is a mass migration of the exile community (including the government) to Linux, particularly since all of the samples of targeted malware collected exploit vulnerabilities in Windows. I would be very interested to hear Slashdot readers opinions on this debate here." (More below.)

Death Metal sends this excerpt from an AP report: "General Dynamics Information Technology put out an ad last month on behalf of the Homeland Security Department seeking someone who could 'think like the bad guy.' Applicants, it said, must understand hackers' tools and tactics and be able to analyze Internet traffic and identify vulnerabilities in the federal systems. In the Pentagon's budget request submitted last week, Defense Secretary Robert Gates said the Pentagon will increase the number of cyberexperts it can train each year from 80 to 250 by 2011. With warnings that the US is ill-prepared for a cyberattack, the White House conducted a 60-day study of how the government can better manage and use technology (PDF) to protect everything from the electrical grid and stock markets to tax data, airline flight systems, and nuclear launch codes. ... Nadia Short, vice president at General Dynamics Advanced Information Systems, said the job posting for ethical hackers fills a critical need for the government."

stoolpigeon writes "General Atomics' new unmanned combat aerial vehicle, the Predator C Avenger, has been making test flights. This new Predator has a stealthy design, 20-hour endurance, is jet powered and has an internal weapons bay. A number of photos have just become available. 'The aircraft was designed so the wings can be folded for storage in hangars or aircraft carrier operations if a naval customer is found. Cassidy, a retired admiral, has talked about a possible Navy role for Predator C since 2002. The Navy was interested in the Predator B's capabilities, but didn't want to introduce any new propeller-driven aircraft onto carrier decks. The UAV also comes with a tailhook, suggesting that carrier-related trials are planned. The inner section of the cranked wing is deep, providing structural strength for carrier landings and generous fuel volume while maintaining a dry, folding outer wing. Right now, the US Air Force and Royal Air Force are considered the most likely users.'"

Random Feature writes "In response to Build an Open Source SSL Accelerator, in which o3 magazine detailed how to build a solution comparable to an F5 BIG-IP 6900 on the cheap, F5 Fires Back claiming it's not as cheap as it appears and pointing out the potential performance implications of a 'cobbled together set of components designed to mimic similar functionality.' The discussion on the performance of the Open Source solution based on Opteron RSA operation processing capabilities brings into question the validity of the 'more SSL TPS for cheaper' argument presented by o3."

Ed Pegg writes "Theo Gray demonstrates the Bacon Lance, a flaming meatsword that can cut through steel. Yes, with some ordinary bacon, and some pure oxygen, it's possible to cut through security doors. Form the article, 'I recently committed myself to the goal, before the weekend was out, of creating a device entirely from bacon and using it to cut a steel pan in half. My initial attempts were failures, but I knew success was within reach when I was able to ignite and melt the pan using seven beef sticks and a cucumber.' This comes out right after his profusely illustrated book of science experiments, Mad Science."