DWF3046 writes "There are lots of things you can infer from Twitter. But while we're learning what we're eating or where we're flying, we haven't been able to use Twitter to determine how we're feeling. Researchers at Harvard and Northwestern have created a video that shows the mood in the US, as inferred using over 300 million tweets, over the course of the day. The results? The early morning and late evening appear to provide the highest levels of happiness. Geographically, the data points to a significantly happier west coast, which is consistently three hours behind the east coast."

agoston.horvath writes "I've written a HOWTO on replacing Mac OS X's built-in encryption (FileVault) with the well-known FUSE-based EncFS. It worked well for me, and most importantly: it is a lot handier than what Apple has put together. This is especially useful if you are using a backup solution like Time Machine. Includes Whys, Why Nots, and step-by-step instructions."

soupman55 writes "I teach Chemistry to students completing their last two years of high school. Basically it's a 'teach and test' course with a few experiments thrown in. I want to jazz up the course using computer and internet resources. For instance, I could set some tasks that require Excel spreadsheet calculations. Or I could set some web quests where students search for information online. One of the decisions to be made is: Do I use computer/internet tasks to help the students grasp the material that is already in the course, or do I help them become aware of ideas that are extensions to their course? Also, when I compare Chemistry classes with Accounting classes, it strikes me that unlike Accounting where learning to use software like Quick Books is an integral part of the course, that there is no particular software that a chemistry student must learn to use. Or is there? What in terms of chemistry and computers worked for you? Or what is there computer-wise that wasn't in your high school chemistry course but should have been?"

Several readers have sent word that George Hotz (a.k.a. geohot), the hacker best known for unlocking Apple's iPhone, says he has now hacked the PlayStation 3. From his blog post: "I have read/write access to the entire system memory, and HV level access to the processor. In other words, I have hacked the PS3. The rest is just software. And reversing. I have a lot of reversing ahead of me, as I now have dumps of LV0 and LV1. I've also dumped the NAND without removing it or a modchip. 3 years, 2 months, 11 days...that's a pretty secure system. ... As far as the exploit goes, I'm not revealing it yet. The theory isn't really patchable, but they can make implementations much harder. Also, for obvious reasons I can't post dumps. I'm hoping to find the decryption keys and post them, but they may be embedded in hardware. Hopefully keys are setup like the iPhone's KBAG."

Gregory Diamos writes "An open source project, Ocelot, has recently released a just-in-time compiler for CUDA, allowing the same programs to be run on NVIDIA GPUs or x86 CPUs and providing an alternative to OpenCL. A description of the compiler was recently posted on the NVIDIA forums. The compiler works by translating GPU instructions to LLVM and then generating native code for any LLVM target. It has been validated against over 100 CUDA applications. All of the code is available under the New BSD license."

c0mpliant writes "NASA and the Jet Propulsion Laboratory have released a simulation of the path of an asteroid, named Apophis, that will come very close to Earth in 2029 — the closest predicted approach since humans have monitored for such heavenly bodies. The asteroid caused a bit of a scare when astronomers first announced that it would enter Earth's neighborhood some time in the future. However, since that announcement in 2004, more recent calculations have put the odds of collision at 1 in 250,000."

drewtheman writes "New studies of the plumbing that feeds the Yellowstone supervolcano in Wyoming's Yellowstone National Park shows the plume and the magma chamber under the volcano are larger than first thought and contradicts claims that only shallow hot rock exists. University of Utah research professor of geophysics Robert Smith led four separate studies that verify a plume of hot and molten rock at least 410 miles deep that rises at an angle from the northwest."

Peter N. M. Hansteen writes "In real life, zombies feed off both weak minds and the weak passwords they choose. When the distributed brute-force attempts stopped abruptly after a couple of months of futile pounding on ssh servers, most of us thought they had seen sense and given up. Now, it seems that they have not; they are back. 'This can only mean that there were enough successful attempts at guessing people's weak passwords in the last round that our unknown perpetrators found it worthwhile to start another round. For all I know they may have been at it all along, probing other parts of the Internet ...' The article has some analysis and links to fresh log data."

I feel safer already.