Nerval's Lobster writes that a survey from the Uptime Institute "suggests something it calls 'green fatigue' is setting in when it comes to making data centers greener. 'Green fatigue' is exactly as it sounds: managers are getting tired of the increasingly difficult race to chop their PUE, or Power Usage Effectiveness. The PUE is a measure of a data center's efficiency. The lower the PUE, the better — and Microsoft and Google, with nearly limitless resources, have set the bar so high (or low, depending on your perspective) that it's making less-capitalized firms frustrated. Just a few years ago, the Uptime Institute estimated that the average PUE of a data center was around 2.4, which meant for every dollar of electricity to power a data center, $1.4 dollars were spent to cool it. That dropped to 1.8 recently, an improvement to be sure. But then you have companies such as Google and Microsoft building data centers next to rivers for cheap hydroelectric power in remote parts of the Pacific Northwest and reporting insanely low PUEs (below 1.1 in some cases). The Institute latest survey of data center operators shows only 50 percent of respondents in North America said they considered energy efficiency to be very important to their companies, down from 52 percent last year and 58 percent in 2011."

New submitter TheJish writes "The RPiCluster is a 33-node Beowulf cluster built using Raspberry Pis (RPis). The RPiCluster is a little side project I worked on over the last couple months as part of my dissertation work at Boise State University. I had need of a cluster to run a distributed simulator I've been developing. The RPiCluster is the result. I've written an informal document on why I built the RPiCluster, how it was built, and how it performs as compared to other platforms. I also put together a YouTube video of it running an MPI parallel program I created to demo the RGB LEDs installed on each node as part of the build. While there have certainly been larger RPi clusters put together recently, I figured the Slashdot community might be interested in this build as I believe it is a novel approach to the rack mounting and power management of RPis."

J.J. Abrams’ 2009 reboot of Star Trek was wildly successful. It raked in hundreds of millions at the box office, and revitalized the Star Trek franchise, which had languished for 7 years without a new film and 4 years without a TV presence (after 18 consecutive years of new shows). It also did something no Trek movie had done before; it made Star Trek ‘cool’ in the public consciousness. Combined, those factors ensured Abrams would get another turn at the helm of a Trek movie, and sooner rather than later. With today's release of Star Trek: Into Darkness, that trend is very likely to continue. It's a movie with all the same strengths and weaknesses of its predecessor, and if it worked before, it'll work again. Read on for our review.

alancronin sends this excerpt from ZDNet: "... the trend that brutally undercut BlackBerry phones during the past five years — the 'bring your own device' movement — is now driving significant sales of BlackBerry Enterprise Service (BES), the company's backend software. 'Our customers have been asking, "Can you just take what you've done on BlackBerry and put it on iOS and Android?"' said Pete Devenyi, BlackBerry's SVP of Enterprise Software. ... Secure Work Space will be an app in the Apple App Store and Google Play, pending approval from Apple and Google, respectively. It will include secure email, calendar, contacts, tasks, and document editing. It won't allow data leakage including copy and paste between Secure Work Space and the rest of the device. IT will be able to remotely wipe everything in the Secure Work Space without affecting any of the other apps or data on the person's device, in a BYOD scenario."

sciencehabit writes "If you are one of the 20% of healthy adults who struggle with basic arithmetic, simple tasks like splitting the dinner bill can be excruciating. Now, a new study suggests that a gentle, painless electrical current applied to the brain can boost math performance for up to 6 months. Researchers don't fully understand how it works, however, and there could be side effects." We've covered various other potential benefits to having your brain shocked.

theodp writes "In 'The Design That Conquered Google,' The New Yorker's Matt Buchanan reports that 'cards' — modeled after real cards — are set to become one of the dominant ways in which Google presents certain types of information to users. The power of a card as a visual-organization metaphor according to Matias Duarte (lead designer of Android), is that 'it makes very clear the atomic unity of things; it's still flexible while creating a kind of regularity.' Hey, maybe that Bill Atkinson was really on to something with that dadgum HyperCard software of his back in the '80s!"

An anonymous reader writes "Back in April 2012, the U.S. Justice Department filed an antitrust lawsuit against Apple and a number of publishers for allegedly colluding to raise the price of e-books on the iBookstore. As part of its investigation into Apple's actions, the Justice Department collected evidence which it claims demonstrates that Apple was the 'ringmaster' in a price fixing conspiracy. Specifically, the Justice Department claims that Apple wielded its power in the mobile app market to coerce publishers to agree to Apple's terms for iBookstore pricing."

MTorrice writes "A low-cost chemical process can turn hemp fiber into carbon nanomaterials. Researchers used the materials to make devices called supercapacitors that provide quick bursts of electrical energy. Supercapacitors made with the hemp nanosheets put out more power than commercial devices can." According to one of the authors, "Hemp bast is a nanocomposite made up of layers of lignin, hemicellulose, and crystalline cellulose ... If you process it the right way, it separates into nanosheets similar to graphene." Perhaps the process could be applied to related plants (hops?) too.

mattOzan writes "When data centers first opened in the 1990s, the tenants paid for space to plug in their servers with a proviso that electricity would be available. As computing power has soared, so has the need for electricity, turning that relationship on its head: electrical capacity is often the central element of lease agreements, and space is secondary. While lease arrangements are often written in the language of real estate, they are essentially power deals. 'Since tenants on average tend to contract for around twice the power they need, Mr. Tazbaz said, those data centers can effectively charge double what they are paying for that power. Generally, the sale or resale of power is subject to a welter of regulations and price controls. For regulated utilities, the average "return on equity" — a rough parallel to profit margins — was 9.25 percent to 9.7 percent for 2010 through 2012.'"

MojoKid writes "For the past decade, AMD and Intel have been racing each other to incorporate more components into the CPU die. Memory controllers, integrated GPUs, northbridges, and southbridges have all moved closer to a single package, known as SoCs (system-on-a-chip). Now, with Haswell, Intel is set to integrate another important piece of circuitry. When it launches next month, Haswell will be the first x86 CPU to include an on-die voltage regulator module, or VRM. Haswell incorporates a refined VRM on-die that allows for multiple voltage rails and controls voltage for the CPU, on-die GPU, system I/O, integrated memory controller, as well as several other functions. Intel refers to this as a FIVR (Fully Integrated Voltage Regulator), and it apparently eliminates voltage ripple and is significantly more efficient than your traditional motherboard VRM. Added bonus? It's 1/50th the size." Update: 05/14 01:22 GMT by U L : Reader AdamHaun comments: "They already have a test chip that they used to power a ~90W Xeon E7330 for four hours while it ran Linpack. ... Voltage ripple is less than 2mV. Peak efficiency per cell looks like ~76% at 8A. They claim hitting 82% would be easy..." and links to a presentation on the integrated VRM (PDF).

A while ago you had the chance to ask mathematician and theoretical physicist Freeman Dyson about his work in quantum electrodynamics, nuclear propulsion, and his thoughts on the past, present, and future of science. Below you'll find his answers to your questions.

An anonymous reader writes "A recurring theme in comments on Slashdot since the 9/11 attacks has been concern about the use of government power to monitor or suppress political activity unassociated with terrorism but rather based on ideology. It has just been revealed that the IRS has in fact done that. From the story: "The Internal Revenue Service inappropriately flagged conservative political groups for additional reviews during the 2012 election . . . Organizations were singled out because they included the words 'tea party' or 'patriot' in their applications for tax-exempt status, said Lois Lerner, who heads the IRS division that oversees tax-exempt groups. In some cases, groups were asked for their list of donors, which violates IRS policy in most cases, she said. 'That was wrong. That was absolutely incorrect, it was insensitive and it was inappropriate. That's not how we go about selecting cases for further review,' Lerner said . . . 'The IRS would like to apologize for that,' she added. . . . Lerner said the practice was initiated by low-level workers in Cincinnati and was not motivated by political bias. . . . she told The AP that no high level IRS officials knew about the practice. Tea Party groups were livid on Friday. ... In all, about 300 groups were singled out for additional review. . . Tea Party groups weren't buying the idea that the decision to target them was solely the responsibility of low-level IRS workers. ... During the conference call it was stated that no disciplinary action had been taken by those who engaged in this activity. President Obama has previously joked about using the IRS to target people." So it's not how they choose cases for review (except when it is), and was not motivated by political bias (except that it was). Also at National Review, with more bite.

cylonlover writes "Millions of years have evolution has resulted in plants being the most efficient harvesters of solar energy on the planet. Much research is underway into ways to artificially mimic photosynthesis in devices like artificial leaves, but researchers at the University of Georgia are working on a different approach that gives new meaning to the term 'power plant.' Their technology harvests energy generated through photosynthesis before the plants can make use of it (abstract), allowing the energy to instead be used to run low-powered electrical devices."

Last week you had the chance to ask software designer and international man on the run John McAfee about his exploits in business, programming, and the jungle. Mr. McAfee provided some extraordinarily entertaining and frank answers to your questions. Read below and enjoy.

mlingojones writes "The CSS Zen Garden — an attempt to showcase the power of CSS, from ye olden days when most sites used tables for layout, when CSS2 was bleeding edge, when IE5 was the most popular web browser — turns 10 today. In celebration, the maintainer Dave Shea is reopening the project for submissions, with a focus on CSS3 and responsive design."

crookedvulture writes "Since their debut five years ago, Intel's low-power Atom microprocessors have relied on the same basic CPU core. That changes with the next generation, which will employ an all-new Silvermont microarchitecture built using a customized version of Intel's tri-gate, 22-nm fabrication process. Silvermont ditches the in-order design of previous Atoms in favor of an out-of-order approach based on a dual-core module equipped with 1MB of shared L2 cache. The design boasts improved power sharing between the CPU and integrated graphics, allowing the CPU cores to scale up to higher speeds depending on system load and platform thermals. Individual cores can be shut down completely to provide additional clock headroom or to conserve power. Intel claims Silvermont doubles the single-threaded performance of its Saltwell predecessor at the same power level, and that dual-core variants have lower peak power draw and higher performance than quad-core ARM SoCs. Silvermont also marks the Atom's adoption of the 'tick-tock' update cadence that guides the development of Intel's Core processors. The successor to Silvermont will be built on 14-nm process tech, and an updated microarchitecture is due after that."

colinneagle writes "I have spent the last couple of days at the StarEast conference, listening to people explain to a roomful of testers about modeling workflows and data transitions, managing test environments in the cloud, writing automation scripts for regression tests, best methods for exploratory testing, running mobile test lab. And as I look around the room at the raw intelligence of the people who are not only absorbing that information but probing deeper into it during the Q&A sessions, I have to wonder how much easier their careers could have been if they had been able to major in Software Testing in college. It's time to give employers a testing workforce that is competitive and trained so they can stand toe-to-toe with the development team. Imagine the power of being able to hire a recent college graduate who has been taught how to develop system diagrams, build complex SQL, run log analysis, set up a cloud test environment, and write automation scripts. No more crossing your fingers that this eager young face in front of you can really pick up those skills, and no more investing so much time and money in training them on the job. We ask no less from Technical Writing and Development. Why do we have such different expectations for one of the most important functions on the team?"

nk497 writes "Dutch police are set to get the power to hack people's computers or install spyware as part of investigations — but antivirus experts say they won't help police reach their targets. Mikko Hypponen, chief research officer at F-Secure, said the Dutch bill could lead to antivirus firms being asked asked to cooperate with authorities to let an attack reach the target. So far, Hypponen hasn't seen a single antivirus vendor cooperate with such a request, and said his own firm wouldn't want to take part. Purely for business reasons, it doesn't make sense to fail to protect customers and let malware through 'regardless of the source.'"

sl4shd0rk writes "Mozilla and Epic (of Epic Megagames fame) have engineered an impressive First Person OpenGL demo which runs on HTML5 and a subset of JavaScript. Emscripten, the tool used, converts C and C++ code into 'low level' JavaScript. According to Epic, The Citadel demo runs 'within 2x of native speeds' and supports features commonly found in native OpenGL games such as dynamic specular lighting and global illumination. This concept was previously covered on Slashdot, however the Citadel demo has just been released this week."

ananyo writes "A robot as small as a housefly has managed the delicate task of flying and hovering the way the actual insects do. The device uses layers of ultrathin materials that can make its wings flap 120 times a second, similar to the rate that a housefly manages. The robot's wings are composed of thin polyester films reinforced with carbon fibre ribs and its 'muscles' are made from piezoelectric crystals, which shrink or stretch depending on the voltage applied to them. Weighing in at just 80 milligrams, the tiny drone cannot carry its own power source, so has to stay tethered to the ground. It also relies on a computer to monitor its motion and adjust its attitude (abstract). Still, it is the first robot to deploy a fly's full range of aerial motion, including hovering (there's a video in the source)."