Search results 15219 items matching your search terms. Filter the results Item type Select All/None Collection GLD Company Event Page Folder New items since Yesterday Last week Last month Ever Sort by relevance date (newest first) alphabetically Electrical engineers Cun-Zheng Ning and Alian Pan are working to improve quaternary alloy semiconductor nanowire materials that could lead to more efficient photovoltaic cells, and to better light-emitting diodes. Located in media technology_thermal-management_mit-team-coaxes-polymers-to-line-up-transforming-them-into-materials-that-could-dissipate-heat_mit_polymerconductor_sm-jpg Located in media At left, an illustration of the tangled nature of the polymer filaments, with heat-stopping voids indicated as dark blobs. When drawn and heated into a thin thread (right), the molecules line up and the voids are compressed, making the material a good conductor. Located in media Figure 4 - Often as an application specific heatsink, it is best to use an adapted standard heatsink. Located in media Figure 3 - The diagram shows the thermal resistance of a heatsink as subject of the size. Located in media Figure 2 - Some standard heatsinks out of a broad range. Located in media Figure 1 - Luminous flux vs ambient temperature for red LED by constant current (according to documents from the company Lumileds ). Located in media HOW IT WORKS: Conventional and magnetic refrigeration cycles use different physical effects to cool things off. [Top] When a gas is compressed (2), it heats up, but if it is cooled and then allowed to expand (3), its temperature drops much lower than it was originally (4); this principle keeps food in your home refrigerator cool. But a magnetocaloric material [bottom] heats up when magnetized (b); if cooled and then demagnetized (c), its temperature drops dramatically (d). Located in media HOW IT WORKS: Conventional and magnetic refrigeration cycles use different physical effects to cool things off. [Top] When a gas is compressed (2), it heats up, but if it is cooled and then allowed to expand (3), its temperature drops much lower than it was originally (4); this principle keeps food in your home refrigerator cool. But a magnetocaloric material [bottom] heats up when magnetized (b); if cooled and then demagnetized (c), its temperature drops dramatically (d). Located in media Figure 4: Current and temperature dependence of the WPE of a red Dragon LED (measured by Mentor Graphics MicReD). Located in media < Previous 10 items 1 ... 1238 1239 1240 1241 1242 1243 1244 ... 1522 Next 10 items > Subscribe to an always-updated RSS feed.
