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judgecorp writes "Latest market share figures show the difference between perception and reality. Windows 7 just nudged past Windows XP with both around the the 43 percent mark. OS X and Windows Vista divide the rest of the spoils, with all versions of OS X only just adding up to a little more than the failed Windows version, according to data from Netmarketshare."

Hugh Pickens writes "Reuters reports that astronauts at the International Space Station ran into problems after removing the station's 100-kg power-switching unit, one of four used in a system that distributes electrical power generated by the station's solar array wings, and were stymied after repeated attempts to attach the new device failed when a bolt jammed, preventing astronauts from hooking it up into the station's power grid. Japanese Astronaut Akihiko Hoshide got the bolt to turn nine times but engineers need 15 turns to secure the power-switching unit. 'We're kind of at a loss of what else we can try,' said astronaut Jack Fischer at NASA's Mission Control Center in Houston after more than an hour of trouble-shooting. 'If you guys have any thoughts or ideas or brilliant schemes on what we can do, let us know.' Hoshide suggested using a tool that provides more force on bolts, but NASA engineers are reluctant to try anything that could make the situation worse and as the spacewalk slipped past seven hours, flight controllers told the astronauts to tether the unit in place, clean up their tools and head back into the station's airlock. NASA officials says the failure to secure the new unit won't disrupt station operations but it will force engineers to carefully distribute electrical power from three operating units to various station systems and says another attempt to install the power distributor could come as early as next week if engineers can figure out what to do with the stubborn bolt. 'We're going to figure it out another day,' says Fischer."

MassDosage writes "After nearly 15 years or of writing code professionally it was refreshing to take a figurative step back and read a book aimed at people getting started with computer programming. As the title suggests, Think Like A Programmer tries to get to the core of the special way that good programmers think and how, when faced with large and complex problems, they successfully churn out software to solve these challenges in elegant and creative ways. The author has taught computer science for about as long as I've been programming and this shows in his writing. He has clearly seen a lot of different people progress from newbie programmers to craftsmen (and craftswomen) and has managed to distill a lot of what makes this possible in what is a clear, well-written and insightful book." Read below for the rest of Mass Dosage's review. Think Like A Programmer author V. Anton Spraul pages 256 publisher No Starch Press rating 8/10 reviewer Mass Dosage ISBN 978-1-59327-424-5 summary An Introduction to Creative Problem Solving Think Like A Programmer is probably best read by those with at least a year's experience with programming, such as first or second year computer science students or those picking up programming on their own. The code examples in the book are all written in C++ so a basic knowledge of C++ syntax is required but this should be easy to pick up by anyone with familiarity with related or similar languages. Experienced programmers looking to brush up on their fundamentals will most likely find something useful here too. They probably do a lot of what is suggested here already without being aware of it but it can be encouraging to see this formalized in a book. I found it gratifying to see that some of the techniques I use daily were covered here — it's good to know that I'm not the only one who scrawls down funny diagrams and sketches out a rough plan before actually typing any code.

Different types of problem solving are discussed in separate chapters which cover the use of data structures, pointers, recursion and code libraries before wrapping up with a final chapter that brings all the previous approaches together. The book is intended to be read in its entirety with later chapters making frequent references to topics covered earlier. Think Like A Programmer is not a cheat sheet or cook book with quick fixes but a more substantive book that rewards those who read it as thoroughly as it has been written. Each chapter contains a few examples which are used to explain the topic under discussion and these have been well chosen to illustrate the key concepts. A series of exercises are also included which build on and extend each chapter. The author stresses that if the reader really wants to learn something and improve their problem solving skills then these exercises should be considered even more important than the text. The best way to learn how to program is by doing and the exercises force one to put what one has just learned into practise. The first few exercises at the end of a chapter are relatively simple and are basically variations on the examples that help the reader build confidence before moving into more challenging and tricky exercises that push one to apply one's recently acquired knowledge to new limits.

Throughout the book everything is explained in a good level of detail and enough background information is provided so that the reader should never feel out of their depth. The pros and cons of the various presented solutions are clearly weighed up with logical backing. The author is obviously very knowledgeable and experienced with teaching hard concepts to new learners and this shows in his no-nonsense, down-to-earth but enjoyable writing style. The code samples are clear and well thought out as are the diagrams that accompany the various examples. The chapter on classes was the only one where I felt like focus was being lost due to too many C++ implementation details but perhaps that's just the nature of the language. I would have liked the example here to show more clearly how classes can turn a morass of functional code into something more logically grouped and easier to understand. To be fair, the exercises at the end of this chapter do ask one to do this by asking one to convert a collection of string utility functions into a more logically organized string class. This again shows the importance of actually doing the exercises and not just simply reading them.

The core idea of how programmers take a complex problem and then break this down into smaller, more manageable and solvable parts is well described. The importance of having a plan before jumping in and writing code without thinking is stressed and there are great suggestions for how to take stock of your own personal strengths and weaknesses and come up with a personal plan that works for you. The example is given of someone who likes jumping right into coding — for someone like this it probably makes sense for them to do early prototyping as a way to start solving a particular problem, as long as the longer term plan involves taking a step away from this and incorporating the lessons learned into a more thoroughly thought out solution later. In this, as in the rest of the book, the author shows his years of experience teaching a wide range of people with different skill sets and approaches to problem solving. There is no single way to think like a programmer, but rather a number of tried and tested strategies that can be employed in various ways. Think Like A Programmer captures this core idea in an satisfying, down to earth manner and I can highly recommend it to anyone wanting to improve their problem solving capabilities. I wish I had had this book when I started studying computer science — the fundamentals contained here would have been a valued addition to the text books teaching syntax and specific technologies.

You can purchase Think Like A Programmer from amazon.com. Slashdot welcomes readers' book reviews -- to see your own review here, read the book review guidelines, then visit the submission page.

New submitter submeta writes "Katsunobu Imai at Hiroshima University has figured out a way to construct a universal Turing machine using cellular automata in a Penrose tile universe. 'Tiles in the first state act as wires that transmit signals between the logic gates, with the signal itself consisting of either a 'front' or 'back' state. Four other states manage the redirecting of the signal within the logic gates, while the final state is simply an unused background to keep the various states separate.' He was not aware of the recent development of the Penrose glider, so he developed this alternative approach."

DevotedSkeptic writes "Caltech scientists have created an ultra-sensitive device that can weigh an individual molecule for the first time. The device is invisible to the naked eye and vibrates at a specific frequency based on the molecule resting on top of its bridge like structure." More in the Caltech press release. This is an improvement on a design from 2009 that also could theoretically weigh a single molecule, but in practice could not because the position along the "bridge" affected the result. Now the researchers have figured out how to measure the position of the molecule on the bridge and compensate. The device is built using semiconductor fabrication techniques "...making it easy to mass-produce. That's crucial, since instruments that are efficient enough for doctors or biologists to use will need arrays of hundreds to tens of thousands of these bridges working in parallel. 'With the incorporation of the devices that are made by techniques for large-scale integration, we're well on our way to creating such instruments,' Roukes says. This new technology, the researchers say, will enable the development of a new generation of mass-spectrometry instruments." The full article is behind a paywall unfortunately.

An anonymous reader (citing "silly workplace security policies") writes "I'm in charge of developing for my workplace a particular sort of 'dynamic' file server for handling scientific data. We have all the hardware in place, but can't figure out what *nix distro would work best. Can the great minds at Slashdot pool their resources and divine an answer? Some background: We have sensor units scattered across a couple square miles of undeveloped land, which each collect ~500 gigs of data per 24h. When these drives come back from the field each day, they'll be plugged into a server featuring a dozen removable drive sleds. We need to present the contents of these drives as one unified tree (shared out via Samba), and the best way to go about that appears to be a unioning file system. There's also requirement that the server has to boot in 30 seconds or less off a mechanical hard drive. We've been looking around, but are having trouble finding info for this seemingly simple situation. Can we get FreeNAS to do this? Do we try Greyhole? Is there a distro that can run unionfs/aufs/mhddfs out-of-the-box without messing with manual recompiling? Why is documentation for *nix always so bad?""

An anonymous reader writes "As a kid in the late 1970s and the 1980s, Dungeons and Dragons, as well as many other fine tabletop roleplaying games, figured heavily in my life. From learning about various forms of governments (theocracies, oligarchies, etc.) and Greek, Norse, and Egyptian mythology, to what N.B. and et al. mean, to the social glue that enabled people like me to get together, write cool adventures, problem-solve, and have a blast doing it all, role playing games were a powerful force in my life. The thing is, I still enjoy playing them. A lot. I get together once a month with friends and we play for sometimes up to eight straight hours of epic battles, puzzles, legends, lore, and camaraderie. All of this, unfortunately, seems totally alien to someone who did not grow up with RPGs and who has never experienced the sheer joy of a dungeon crawl. Have you ever had to explain to your spouse or significant other why you value gaming so much, or why it is ok to spend a hunk of time with other gamers? How do you begin to relate it all to them?"

First time accepted submitter deapbluesea writes "Matt Ridley recounts the many predictions of catastrophe that have been made by prominent figures in the past. 'The classic apocalypse has four horsemen, and our modern version follows that pattern, with the four riders being chemicals (DDT, CFCs, acid rain), diseases (bird flu, swine flu, SARS, AIDS, Ebola, mad cow disease), people (population, famine), and resources (oil, metals).' From over population, to pandemics, peak oil to climate change, Ridley provides examples of human innovation that have averted the disasters, real or imagined. He does not declare the doomsayers to be wrong, merely hyperbolic in their predictions. 'We hear a lot from those who think disaster is inexorable if not inevitable, and a lot from those who think it is all a hoax. We hardly ever allow the moderate "lukewarmers."' Given the current discussions on rich vs poor, conservative vs liberal, religious versus non-religious, maybe a little moderation should be in order. After all, there are a lot of examples of 'experts' who got it completely wrong in the past."

1sockchuck writes "JPMorgan Chase spends $500 million to build a data center, according to CEO Jamie Dimon. That figure places the firm's facilities among the most expensive in the industry, on a par with investments by Google and Microsoft in their largest data centers. Dimon discussed the firm's IT spending in an interview in which he asserts that huge data centers are among the advantages of ginormous banks. Dimon also offered a vigorous defense of the U.S. banking industry. 'Most bankers are decent, honorable people,' Dimon says. 'We're wrapped up in all this crap right now. We made a mistake. We're sorry. It doesn't detract from all the good things we've done. I am not responsible for the financial crisis.'"

An article at Ars summarizes a study into how simply seeing pictures can alter what we believe, even if the pictures don't provide any information about the topic at hand (abstract). Researchers asked true-or-false questions to a group of test subjects about whether a minor celebrity was still alive. When they provided a picture of the celebrity, more people evaluated the statement as 'true' than when no picture was provided. The researchers then switched the question, asking whether it was true or false that the celebrity was dead. Again, the subjects shown a picture were more likely to respond with 'true.' Experiments also showed this phenomenon wasn't limited to questions about people, but general knowledge as well. "The authors spend a bit of time discussing why this sort of truth bias might arise. In cases where we have rich information—a photo or detailed description of something—it's easier to pull additional information out of our memory. So, even if a photo doesn't tell us much about whether the person is alive, it does make it easier to retrieve relevant information on them—if they're wearing a suit in the photo, we might reason they're a political or financial figure, etc. When the information flows that readily, we're more likely to conclude that we're familiar with the question that's being posed, and will then tend to conclude it's true."

hypnosec writes "A new report by an open source internet measurement platform, Measurement Lab, sheds light onto throttling of and restriction on BitTorrent traffic by ISPs (Internet Service Providers) across the globe. The report by Measurement Lab reveals that hundreds of ISPs across the globe are involved in the throttling of peer-to-peer traffic, and specifically BitTorrent traffic. The Glasnost application run by the platform helps in detecting whether ISPs shape traffic. Tests can be carried out to check whether the throttling or blocking is carried out 'on email, HTTP or SSH transfer, Flash video, and P2P apps including BitTorrent, eMule and Gnutella.' Going by country, United States has actually seen a drop in throttling compared to what it was back in 2010. Throttling in the U.S. is worst for Cox at 6 per cent and best for Comcast, Verizon, AT&T and others at around 3 per cent. The United Kingdom is seeing a rise in traffic shaping and BT is the worst at 65 per cent. Virgin Media throttles around 22 per cent of the traffic while the least is O2 at 2 per cent. More figures can be found here."

Hugh Pickens writes "Rebecca Rosen writes that when hackers broke into Mat Honan's Apple account last week, they couldn't answer his security questions but Apple didn't care and issued a temporary password anyway. This was a company disregarding its own measure, saying, effectively, security questions are a joke and we don't take them very seriously. But even if Apple had required the hackers to answer the questions, it's very likely that the hackers would have been able to find the right answers. 'The answers to the most common security questions — where did you go to high school? what is the name of the first street you lived on? — are often a matter of the public record,' writes Rosen, 'even more easily so today than in the 1980s when security questions evolved as a means of protecting bank accounts.' Part of the problem is that a good security question is hard to design and has to meet four criteria: A good security question should be definitive — there should only be one correct answer; Applicable — the question should be possible to answer for as large a portion of users as possible; Memorable — the user should have little difficulty remembering it; and Safe — it should be difficult to guess or find through research. Unfortunately few questions fit all these criteria and are known only by you. 'Perhaps mother's maiden name was good enough for banking decades ago, but I'm pretty sure anyone with even a modicum of Google skills could figure out my mom's maiden's name,' concludes Rosen. Passwords have reached the end of their useful life adds Bruce Schneier. 'Today, they only work for low-security applications. The secret question is just one manifestation of that fact.'"

Rick Zeman writes "CNN has an expose showing that in South Korea, the world's most wired country, Internet gaming breeds two extremes: elite 'athletes' who earn fame and six figures, and addicts who literally play until they die and tells the stories of players on both sides of that real-life divide. From the article: 'The first thing you notice about the professional video game players are their fingers — spindly creatures that seem to flail about at their own will, banging at the computer keyboard with such frequency and ferocity that to visit their live-in training centers in South Korea is to be treated to a maddening drum roll of clicks and clacks.'"

Hugh Pickens writes "Humans have pondered their mortality for millennia. Now the University of California at Riverside reports that it has received a $5 million grant from the John Templeton Foundation that will fund research on aspects of immortality, including near-death experiences and the impact of belief in an afterlife on human behavior. 'People have been thinking about immortality throughout history. We have a deep human need to figure out what happens to us after death,' says John Martin Fischer, the principal investigator of The Immortality Project. 'No one has taken a comprehensive and sustained look at immortality that brings together the science, theology and philosophy.' Fischer says he going to investigate two different kinds of immortality. One is the possibility of living forever without dying. The main questions there are whether it's technologically plausible or feasible for us, either by biological enhancement such as those described by Ray Kurzweil, or by some combination of biological enhancement and uploading our minds onto computers in the future. Second would be to investigate the full range of questions about Judeo, Christian, Hindu, Buddhist, and other Asian religions' conceptions of the afterlife to see if they're theologically and philosophically consistent. 'We'll look at near death experiences both in western cultures and throughout the world and really look at what they're all about and ask the question — do they indicate something about an afterlife or are they kind of just illusions that we're hardwired into?'"

wiredmikey sends this excerpt from SecurityWeek: "A recent article on ProPublica dissected two commonly quoted figures about cybersecurity: $1 trillion in losses due to cybercrime itself and $388 million in IP losses for American companies. Both figures have been scrutinized and challenged by many, and viewed as typical security vendor FUD. ... The $1 trillion figure is attributed to anti-virus vendor McAfee, while the $388 million in IP losses number belongs to Symantec's Norton division. According to ProPublica, 'The report was not actually researched by Norton employees; it was outsourced to a market research firm, StrategyOne, which is owned by the public relations giant Edelman.' The problem with both of these figures — $1 trillion and $388 million — is, as Microsoft researchers pointed out earlier this year in a report fittingly titled 'Sex, Lies, and Cybercrime,' they are studded with outliers. In one example they cite that a single individual who claims $50,000 losses, in an N = 1000 person survey, is enough to extrapolate a $10 billion loss over the population. In another, one unverified claim of $7,500 in phishing losses translates into $1.5 billion over the population. The Microsoft researchers concluded: 'Are we really producing cyber-crime estimates where 75% of the estimate comes from the unverified self-reported answers of one or two people? Unfortunately, it appears so. Can any faith whatever be placed in the surveys we have? No, it appears not.'"

jfruh writes "Dan Tynan is a tech writer and blogger who discovered, while trying to post links to his writing on his Google+ profile, that his account had been suspended. This despite the fact that he used his real name and didn't violate the terms of service in any other way. Upon appeal his account was reinstated, just as mysteriously as it was shut down, but along the way he discovered a rash of people with suspended Google+ accounts who can't figure out what they did to anger the Google gods."

redkemper writes "More than 400,000 American homes have cut the cord and ditched their cable and satellite pay-TV services since the start of 2012. The figure includes 169,000 subscribers shed by Time Warner Cable last quarter, marking the service provider's tenth consecutive quarter of customer losses. It also includes the 52,000 net subscribers DirecTV lost this past quarter, and 176,000 customers who left Comcast."

MrSeb writes "In a twist that reinforces Valve's distaste for Windows 8, it turns out that the Source engine — the 3D engine that powers Half Life 2, Left 4 Dead, and Dota 2 — runs faster on Ubuntu 12.04 and OpenGL (315 fps) than Windows 7 and DirectX/Direct3D (270.6 fps); almost a 20% speed-up. These figures are remarkable, considering Valve has been refining the Source engine's performance under Windows for almost 10 years, while the Valve Linux team has only been working on the Linux port of Source for a few months. Valve attributes the speed-up to the 'underlying efficiency of the [Linux] kernel and OpenGL.' But here's the best bit: Using these new OpenGL optimizations to the Source engine, the OpenGL version of L4D2 on Windows is now faster than the DirectX version (303.4 fps vs. 270.6 fps). If OpenGL is faster, and it has a comparable feature set, and hardware support is excellent... why is Direct3D still the de facto API? With Windows losing its gaming crown and smartphones (OpenGL ES!) gaining in popularity, is it time for an OpenGL revolution?"

An anonymous reader writes with an excerpt from an article at Geek.com "A team of computer scientists at Harvard University have developed a piece of software that allows anyone to 3D print their own action figures at home. Not only will the models carry the likeness of the character, they will also be fully articulated. The software can take an animated 3D character and figure out where best to place its joints. In what is referred to as reverse rendering, the software first looks at an animated character's shape and movement and identifies the best joint points (original paper, paywalled). It then adjusts the size of the different parts of the model so as to allow a real joint to work once printed. Optimizations are then carried out to produce a model as close as possible to the on-screen version, but at the same time workable as an actual real-world, articulated 3D model." The bad news: Harvard is patenting everything and wants to commercialize it on a proprietary basis. The good news: An anonymous reader pointed toward the paper in full.

jfruh writes "More and more people are joining the ranks of 'cord-cutters' — those who cancel their cable TV subscriptions and get their televisied entertainment either for free over the airwaves or over the Internet. But, assuming you're going to do things legally, is this really a cheaper option? It depends on what you watch. Brian Proffitt contemplated this move, and he walks you through the calculations he made to figure out the prices of cutting the cord. He weighed the costs of various a la carte and all-you-can-eat Internet streaming services, and took into account the fact that Internet service on its own is often pricier than it would be if bundled with cable TV."