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Submission + - "Synergetic Air-Breathing Rocket Engine" gets Air Force nod (theengineer.co.uk)

Submitted by LeadSongDog
LeadSongDog writes: The US Air Force Research Lab has been looking at the SABRE concept from the UK maker Reaction Engines, which has already been endorsed by the European Space Agency. The hybrid runs as a jet from stationary to Mach 5.5, then it becomes a rocket for all the way up to Mach 25. The magic is all in keeping the heat exchanger from icing up. This now clears the way for funding the next step: build and test demonstrator engines.

Submission + - Imagination to Release Open MIPS Design to Academia (linuxgizmos.com)

Submitted by __aajbyc7391
__aajbyc7391 writes: Imagination Technologies has developed a Linux-ready academic version of its 32-bit MIPS architecture MicroAptiv processor design, and is giving it away free to universities for use in computer research and education. As the MIPSfpga name suggests, the production-quality RTL (register transfer level) design abstraction is intended to run on industry standard FPGAs. Although MIPSfpga is available as a fully visible RTL design, MIPSfpga is not fully open source, according to the announcement from Robert Owen, Manager of Imagination’s University Programme. Academic users can use and modify MIPSfpga as they wish, but cannot build it into silicon. 'If you modify it, you must talk to us first if you wish to patent the changes,' writes Owen.

Submission + - Privileged malware coming to a CPU near you? (virusbtn.com)

Submitted by ArmoredDragon
ArmoredDragon writes: For the past few years, Intel has been developing a new technology called Software Guard Extensions. The gist of it is that software can be protected from snooping or manipulation from untrusted higher privileged processes, or even from processes running outside of a VM. This sounds good in principle because it could protect your trusted software from malware, especially for cloud environments where IT security is paramount. The problem however is that it is very much a double edged sword. Malware, such as that found in a botnet, could easily hide itself from any kind of scanning software, or even a white-hat hacker trying to debug it. Or even worse, entities like the NSA could potentially issue an NSL to give themselves authority to create trusted applications that are allowed to spy on protected processes, while everybody who isn't whitelisted by Intel would be placed at a major disadvantage if they ever wanted to audit such software.

Submission + - GNU Hurd 0.6 Released (lwn.net)

Submitted by jrepin
jrepin writes: It has been roughly a year and a half since the last release of the GNU Hurd operating system, so it may be of interest to some readers that GNU Hurd 0.6 has been released along with GNU Mach 1.5 (the microkernel that Hurd runs on) and GNU MIG 1.5 (the Mach Interface Generator, which generates code to handle remote procedure calls). New features include procfs and random translators; cleanups and stylistic fixes, some of which came from static analysis; message dispatching improvements; integer hashing performance improvements; a split of the init server into a startup server and an init program based on System V init; and more.

Submission + - An engineering analysis of the Falcon 9 first stage landing failure

Submitted by schwit1
schwit1 writes: Link here.

SpaceX founder and chief technology officer Elon Musk tweeted that "excess lateral velocity caused it [the booster] to tip over post landing." In a later tweet that was subsequently withdrawn, Musk then indicated that "the issue was stiction in the biprop throttle valve, resulting in control system phase lag." In this statement, Musk was referring to "stiction" — or static friction — in the valve controlling the throttling of the engine. The friction appears to have momentarily slowed the response of the engine, causing the control system to command more of an extreme reaction from the propulsion system than was required. As a result, the control system entered a form of hysteresis, a condition in which the control response lags behind changes in the effect causing it.

Despite the failure of the latest attempt, SpaceX will be encouraged by the landing accuracy of the Falcon 9 and the bigger-picture success of its guidance, navigation and control (GNC) system in bringing the booster back to the drone ship. The GNC also worked as designed during the prior landing attempt in January, which ended in the destruction of the vehicle following a hard touchdown on the edge of the platform.

Submission + - How Mission Creep Killed a Gaming Studio (dice.com)

Submitted by Nerval's Lobster
Nerval's Lobster writes: Over at Kotaku, there’s an interesting story about the reported demise of Darkside Game Studios, a game-development firm that thought it finally had a shot at the big time only to collapse once its project requirements spun out of control. Darkside got a chance to show off its own stuff with a proposed remake of Phantom Dust, an action-strategy game that became something of a cult favorite. Microsoft, which offered Darkside the budget to make the game, had a very specific list of requirements for the actual gameplay. The problem, as Kotaku describes, is those requirements shifted after the project was well underway. Darkside needed more developers, artists, and other skilled tech pros to finish the game with its expanded requirements, but (anonymous sources claimed) Microsoft refused to offer up more money to actually hire the necessary people. As a result, the game’s development imploded, reportedly followed by the studio. What’s the lesson in all this? It’s one of the oldest in the book: Escalating and unanticipated requirements, especially without added budget to meet those requirements, can have devastating effects on both a project and the larger software company.

Submission + - Congress Introduces the Fair Play Fair Pay Act of 2015 (house.gov)

Submitted by Major Blud
Major Blud writes: Congressman Jerrold Nadler (D-NY) and Marsha Blackburn (R-TN) introduced the Fair Play Fair Pay Act today that would end regulations that don't require terrestrial radio stations to pay royalties to artists and labels. Currently, AM/FM radio stations aren't required to pay royalties to publishers and songwriters. The proposed measure requires stations that earn less than $1 million a year in revenue to pay $500 annually. For nonprofit public, college and other non-commercial broadcasters, the fee would be $100 per year — religious and talk stations being exempt from any payments. Larger radio companies like iHeartMedia (858 stations in the US) would have to pay more.

"The current system is antiquated and broken. It pits technologies against each other, and allows certain services to get away with paying little or nothing to artists. For decades, AM/FM radio has used whatever music it wants without paying a cent to the musicians, vocalists, and labels that created it. Satellite radio has paid below market royalties for the music it uses, growing into a multibillion dollar business on the back of an illogical ‘grandfathered’ royalty standard that is now almost two decades old,” said Congressman Nadler.

Submission + - Acetaminophen reduces both pain and pleasure, study finds (scienceblog.com)

Submitted by Anonymous Coward
An anonymous reader writes: Researchers studying the commonly used pain reliever acetaminophen found it has a previously unknown side effect: It blunts positive emotions. Acetaminophen, the main ingredient in the over-the-counter pain reliever Tylenol, has been in use for more than 70 years in the United States, but this is the first time that this side effect has been documented.

Submission + - Being Overweight Reduces Dementia Risk (bbc.com)

Submitted by jones_supa
jones_supa writes: Being overweight cuts the risk of dementia, according to the largest and most precise investigation into the relationship. The researchers were surprised by the findings, which run contrary to current health advice. The team at Oxon Epidemiology and the London School of Hygiene and Tropical Medicine analysed medical records from 2 million people aged 55 on average, for up to two decades. Their most conservative analysis showed underweight people had a 39% greater risk of dementia compared with being a normal healthy weight. But those who were overweight had an 18% reduction in dementia, and the figure was 24% reduction for the obese. Any explanation for the protective effect is distinctly lacking. There are some ideas that vitamin D and E deficiencies contribute to dementia and they may be less common in those eating more. Be it any way, let's still not forget that heart disease, stroke, diabetes, some cancers and other diseases are all linked to a bigger waistline. Maybe being slightly overweight is the optimum to strike, if the recent study is to be followed.

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