North Carolina State University
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Researchers boost multi-core CPU performance with better prefetching
Piling on cores is one way to boost performance, but it's not necessarily the most efficient way -- researchers at North Carolina State University have developed a new prefetching technique for processors that could boost performance by up to 40-percent. As you may know, any data not stored in a CPU's cache must be pulled from RAM, but as more cores are added they can create a bottleneck by competing for memory access. To counter this designers use prefetching to predict what information will be needed and grab it ahead of time, but guessing wrong can hurt performance. Researchers tackled this problem from two fronts: first, by creating a better algorithm for divvying up bandwidth, and second, by selectively turning off prefetching when it might slow the CPU. Full PR and an abstract of the study being published June 9th are after the break.
Laser steering system uses liquid crystal to destroy the enemy on the cheap (video)
It might look like a poor man's game of Pong now, but a new laser steering system coming out of North Carolina State University could make blowing things up Star Wars-style cheaper and more efficient. The setup enlists a series of "polarization gratings" through which a laser beam passes. Each of these gratings, made of liquid crystal applied to a plate of glass, are configured to redirect the light in a particular direction, thus simply steering the laser beam without significantly decreasing its power -- with each grating comes a new "steerable" angle. The system's creators point out its not only hyper accurate, but also less expensive than existing arrangements due to the use of liquid crystal. Apparently the US Air Force is already using the stuff, but don't expect them to go all Death Star anytime soon.
NC State's computer vision software promises improved self-driving vehicles
Well, NC State researchers sure seem to be keeping themselves busy these days, with them not only recently developing some improved smart sensors, but some computer vision software that could one day lead to self-driving vehicles. The big advantage with their software is that it's basically able to watch the road and recognize real world driving conditions a few steps in advance -- lane changes, stop signs, etc. -- while also watching out for other cars and pedestrians. Of course, at the moment, that "road" is actually the hallways of NC State, and the vehicle is a toy Jeep, but you get the idea. The researchers are also quick to point out that while the software could eventually lead to truly autonomous vehicles, they first see it being used in the event of an emergency, with the car able to slowly and safely pull itself over and then dial 911. Head on past for a quick overview, local news style.
NC State's refreshable Braille display could revolutionize reading for the blind
While many in Raleigh are wondering whatever happened to the glory days of 1983, Dr. Neil Di Spigna and company are doing far more productive things at NC State. It's no secret that the holy grail of Braille is a tactile display that could change on a whim in order to give blind viewers a way to experience richer content (and lots more of it) when reading, but not until today have we been reasonably confident that such a goal was attainable. Gurus at the university have just concocted a "hydraulic and latching mechanism" concept, vital to the creation of the full-page, refreshable Braille display system. As you may expect, the wonder of this solution is the display's ability to erect dots at the precise points, retract them, and re-erect another set when the reader scrolls through a document or presses a "link" on a website. We're told that the researchers have already presented their findings, and if all goes well, they'll have a fully functioning prototype "within a year." Here's hoping a suitable replacement to Lee Fowler is also unearthed during the same window.
