The degradation mechanism of mid-power GaN-based white LEDs were investigated by using the in-situ multi-functional accelerated aging tests.The changes of the luminous flux and the chromaticity shift during the stress time show some correlations.To quantitatively analyze the degradation behavior, a composite model considering the luminous flux incr

Cooking Toys Museums environment is complicated and defined by indoor air quality, thermal and lighting comfort.Artifacts deterioration is factored by extreme conditions of thermal exposure or excessive lighting.With high control required for exposed old monuments and visitor comfort, museums energy systems reach extreme levels.In this paper, we ai

Using Statistics Wellington Shoes of U.S.federal budget dating back to the 1900’s the paper provides a test to a proposition in the political science literature stating that a divided government, where the legislative branch and the executive branch belong to different political parties, give rise to worse political budget policy Fishing Lure Key