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Transportation

Carefully Timed Jerks Could Power Space Elevator 270

Posted by ScuttleMonkey from the pull-harder-and-faster dept.
Hugh Pickens writes "BBC has an interesting article on the long-standing issue of how to power the 'climber' that would ascend a space elevator into space. Previous ideas have included delivering microwave or laser power to the climber beamed from the Earth's surface, but now European Space Agency ground station engineer Age-Raymond Riise has demonstrated a device that could provide a "lift into space" for cheaper space missions along a 100,000-km long tether anchored to the Earth. Riise demonstrated sending power mechanically by providing carefully timed jerks of the cable at its base with a broomstick to represent the cable held in tension, an electric sander to provide a rhythmic vibration to the bottom of the stick, and three brushes representing the climber with their bristles pointing downwards allowing the climber assembly to slide upward along the broomstick as it moved slightly downward, but grip it as it moved slightly upward. 'It would be possible to make a suspension system that completely decouples the cabin where the passengers are,' says Riise. 'For them it would be a linear movement with very little disturbance.' Riise says that he has been approached by commercial elevator companies, who are researching new ideas for elevators in superscrapers where the simplicity of the approach makes it attractive when compared to other ideas for powering lifts, such as compressed air."
PC Games (Games)

Why Game Developers Should Support OS X and Linux 283

Posted by Soulskill from the good-faith dept.
kevind23 writes "Although Mac OS X and Linux have a small (but growing) market share, Jeff from Wolfire Games argues that supporting non-Windows platforms can lead to a huge increase in game sales. Using their popular game Lugaru as an example, he shows how less-popular platforms, or more specifically, their userbase can be a powerful advertising force. This can lead to a dramatic increase in popularity and exposure, which usually means a large boost in overall sales. The short article is an interesting read, especially for those working in game development and sales."

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