By Soulskill from
Slashdot's curse-you-big-bird department:
Hugh Pickens DOT Com writes
"Mark Thompson writes in Time Magazine that Air Force pilots flying the T-38 Talon can rest easy, knowing that their cockpit canopy can survive hitting a 4-lb. bird at 190 mph. Unfortunately, the Northrop supersonic jet trainer has a top speed of 812 mph. 'To my knowledge, the training planes are the only ones in the Air Force fast enough to make a bird strike lethal, and with a windshield too flimsy to deflect one,' wrote one Air Force pilot. Midair collisions between birds and Air Force aircraft have destroyed 39 planes and killed 33 airmen since 1973. That's why the USAF is seeking comments to 'identify potential sources, materials, timeframe, and approximate costs to redesign, test, and produce 550 T-38 forward canopy transparencies to increase bird strike capability.' The move follows a T-38 crash on July 19 in Texas triggered by a canopy bird strike. 'The current 0.23 inch thick stretched acrylic transparency can resist a 4-pound bird impact at 165 knots which does not offer a capability to resist significant bird impacts, and has resulted in the loss of six (6) aircraft and two pilot fatalities,' the service acknowledged. 'Numerous attempts since 1970 were made to evaluate existing materials and redesign a transparency that could withstand a bird impact of 4 pounds at 400 knots.' Previous efforts have foundered because they'd require expensive cockpit modifications to the twin-engine, two-seat supersonic jet. 'Although it would increase the level of bird impact protection,' the Air Force said, 'the proposal was cancelled due to the high cost of the modification.'"Read Replies (0)
By Soulskill from
Slashdot's it-all-comes-down-to-focus department:
An anonymous reader writes
"To boost its Wi-Fi capacity in packed lecture halls, Georgia Institute of Technology gave up trying to cram in more access points with conventional omni-directional antennas, and juggle power settings and channel plans. Instead, it turned to new high-gain directional antennas. They look almost exactly like the bottom half of a small pizza box, and focus the Wi-Fi signal from the ceiling-mounted access point in a precise cone-shaped pattern, covering part of the lecture hall floor. Instead of the flaky, laggy connections, about which professors had been complaining, users now consistently get up to 144Mbps (if they have 802.11n client radios). 'Overall, the system performed much better' with the new antennas, says William Lawrence, IT project manager principal with the university's academic and research technologies group. 'And there was a much more even distribution of clients across the room's access points.'"Read Replies (0)
By Soulskill from
Slashdot's superfluous-frames-per-second-battle-continues department:
crookedvulture writes
"The back and forth battle for PC graphics supremacy is quite a thing to behold. Last week, Nvidia cut GeForce prices in response to the arrival of AMD's latest Radeons. That move caused AMD to rejigger its plans for the new Radeon R9 290, which debuted today with a higher default fan speed and faster performance than originally planned. This $400 card offers almost identical performance to AMD's flagship R9 290X for $150 less. Indeed, it's often faster than Nvidia's $1000 GeForce Titan. But the 290 also consumes a lot more power, and its fan spins up to 49 decibels under load. Fortunately, the acoustic profile isn't too grating. Radeon R9 290 isn't the only new graphics card due this week, either. Nvidia is scheduled to unveil its GeForce GTX 780 Ti on November 7, and that card could further upset the balance at the high end of the GPU market. As AMD and Nvidia trade blows, PC gamers seem to be the ones who benefit."Additional reviews available from
AnandTech,
PC Perspective,
Hot Hardware, and
Tom's Hardware.
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