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Blog – Page 9787

Carbon fiber composites—lightweight and strong—are great structural materials for automobiles, aircraft and other transportation vehicles. They consist of a polymer matrix, such as epoxy, into which reinforcing carbon fibers have been embedded. Because of differences in the mechanical properties of these two materials, the fibers can detach from the matrix under excessive stresses or fatigue. That means damage in carbon fiber composite structures can remain hidden below the surface, undetectable by visual inspection, potentially leading to catastrophic failure.

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NASA and Northrop Grumman have made the decision to fly the L-1011 Stargazer and Pegasus XL rocket carrying NASA’s Ionospheric Connection Explorer, or ICON, spacecraft back to its integration facility at Vandenberg Air Force Base in California. The ferry flight will take place early next week. Returning to the environmentally-controlled integration facility allows the team to further investigate off-nominal data observed during the Nov. 7 launch attempt.

Once the investigation is complete, a new launch date will be determined. ICON will launch out of Cape Canaveral Air Force Station in Florida. The ICON spacecraft, which uses Northrop Grumman’s LEOStar-2 platform, is monitored at all times and remains healthy.

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Scientists at the National Synchrotron Light Source II (NSLS-II)—a U.S. Department of Energy (DOE) Office of Science User Facility at DOE’s Brookhaven National Laboratory—have used ultrabright x-rays to image single bacteria with higher spatial resolution than ever before. Their work, published in Scientific Reports, demonstrates an X-ray imaging technique, called X-ray fluorescence microscopy (XRF), as an effective approach to produce 3D images of small biological samples.

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En Taro AI

The latest results in a long-running contest of video-game-playing AIs reveal how hard it is for machines to master swarming insectoid Zergs or blitzing Protos. They also show that even old-school approaches can still sometimes win out.

The AIIDE Starcraft Contest has been running at Memorial University in Newfoundland, Canada, since 2010. Participating teams submit bots that play an original version of Starcraft, a sprawling sci-fi-themed game, in a series of one-on-one showdowns.

Starcraftiness: Video games are generally useful in AI because they offers a constrained environment and a good way to quantify progress. The popular online strategy game Starcraft has emerged as an important benchmark for AI both because it is extremely complicated and because it’s a game where it’s hard to measure progress. There are a vast number of possible states and a huge number of potential moves at every moment. And it can be hard to tell if a strategy is a good one until much later on in a battle.

Continue reading “An old-fashioned AI has won a Starcraft shootout” | >

The “goodnight” commands finalize the spacecraft’s transition into retirement, which began on Oct. 30 with NASA’s announcement that Kepler had run out of fuel and could no longer conduct science.

Coincidentally, Kepler’s “goodnight” falls on the same date as the 388-year anniversary of the death of its namesake, German astronomer Johannes Kepler, who discovered the laws of planetary motion and passed away on Nov. 15, 1630.

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