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Media

Roku Finally Gets a 2D Menu System 80

Posted by samzenpus from the new-look dept.
DeviceGuru writes "Many of us have griped for years about Roku's retro one-dimensional user interface. Finally, in conjunction with the release of the new Roku 3 model, the Linux-based media streaming player is getting a two-dimensional facelift, making it quicker and easier to access favorite channels and find new ones. Current Roku users, who will now begin suffering from UI-envy, will be glad to learn that Roku plans to push out a firmware update next month to many earlier models, including the Roku LT, Roku HD (model 2500R), Roku 2 HD, Roku 2 XD, Roku 2 XS, and Roku Streaming Stick. A short demo of the new 2D Roku menu system is available in this YouTube video."
Businesses

How Long Before Apps Overtake Physical Video Game Content Sales? 144

Posted by Soulskill from the think-we're-just-waiting-on-call-of-duty-halo-and-wow-ports dept.
jamie writes "Horace Dediu crunches some numbers and comes to a startling conclusion: 'If you look at the red line above and its slope, it would indicate that, given time, the App store will overtake the entire physical media gaming industry. The time when that happens will depend a lot on the growth or decline of the physical game media business, but another four years seems a safe bet.' This follows on the heels of some earlier analysis of apps per iOS device and what that steady upward growth means."
Software

Graphic Map of Linux-2.6.36 25

Posted by timothy from the under-the-hood dept.
conan.sh writes "The Interactive map of Linux Kernel was expanded and updated to the recent kernel linux-2.6.36. Now the map contains more than four hundred important source items (functions and structures) with links to source code and documentation."
Games

Study Finds That "Extreme Gamers" Play 48 Hours a Week 272

Posted by Soulskill from the i-blame-blizzard dept.
An anonymous reader writes "Think you're a big gamer? According to a new study from market research firm NPD Group, to be considered among the real hardcore you'll need to play an average of 48.5 hours a week — nearly seven hours a day. This group of gamers is, on average, '29 years old, and — perhaps surprisingly — one-third of them are female. They're more likely to play on consoles than on the PC, and on average they've purchased 24 titles in the past three months — a bill that could easily run over a thousand dollars. But dedicated though they may be, the Extreme Gamers are just a small minority: a mere 4% of the US's 174-million-strong gaming public. '"
Power

Traffic-Flow Algorithm Can Reduce Fuel Consumption 328

Posted by timothy from the what-could-possibly-go-wrong dept.
thecarchik writes "New projects from German automakers Audi and BMW promise to ease congestion simply by looking at traffic signals and driving style, in an effort to smooth the flow of traffic. Through a test course in Munich, vehicles were able to post phenomenal fuel efficiency gains simply by adjusting the timing of traffic lights depending on traffic volume — to whatever speed provides a so-called 'green wave' of four or more synchronized signals."

Comment Re:Iron Man's Suit Defies Physics -- Mostly (Score 2, Interesting) 279

by John Carmack (#23266718) Attached to: The Science of Iron Man
Hydrogen peroxide powered rocket packs fly for around 30 seconds, because they have a specific impulse of around 125, meaning that one pound of propellant can make 125 pound-seconds of thrust, meaning that it takes about two pounds of propellant for every second you are in the air. Mass ratios are low for anything strapped to a human, so the exponential nature of the rocket equation can be safely ignored.

A pretty hot (both literally and figuratively) bipropellant rocket could manage about twice the specific impulse, and you could carry somewhat heavier tanks, but two minutes of flight on a rocket pack is probably about the upper limit with conventional propellants.

However, an actual jet pack that used atmospheric oxygen could have an Isp ten times higher, allowing theoretical flights of fifteen minutes or so. Here, it really is a matter of technical development, since jet engines have thrust to weight ratios too low to make it practical. There is movement on this technical front, but it will still take a while.

John Carmack
Power

The Texas Petawatt Laser 174

Posted by kdawson from the you-can-pet-a-dog-or-you-can-pet-a-cat dept.
Roland Piquepaille notes the hype surrounding what the University of Texas at Austin is calling the world's most powerful laser. During a tenth of a femtosecond this laser is 2,000 times more powerful than all the power plants in the US, and is brighter than sunlight on the surface of the Sun. On his own blog Roland points out that UT's is not the first petawatt laser; that distinction belongs to a system installed at Lawrence Livermore National Laboratory in 1996.

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