Výsledky vyhledávání - "David L. Beshears"

Preparation of Cr-doped Y3Al5O12 phosphors by heterogeneous precipitation methods and their luminescent properties

Autor: Stephen W. Allison, David Eugene Holcomb, Mariappan Parans Paranthaman, Michael R. Cates, I Matsubara, David L. Beshears

Publikováno v: Materials Research Bulletin. 35:217-224

Chromium-doped Y 3 Al 5 O 12 (YAG-Cr) phosphor powders were prepared by a heterogeneous precipitation method. Hydroxide precursor powders were precipitated from their respective metal sulfate solutions with urea. The formation of the YAG phosphors wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d2f9172319799e052818f9eb08021588
https://doi.org/10.1016/s0025-5408(00)00202-6

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Phosphor thermometry at cryogenic temperatures

Autor: Michael R. Cates, David L. Beshears, Stephen W. Allison, Cathy M. Simmons

Publikováno v: Review of Scientific Instruments. 68:2412-2417

The temperature dependence of the lifetimes of two phosphors, La2O2S:Eu and Mg4FGeO6:Mn, is presented from 300 to 11 and 140 to 8 K, respectively. Emission from the 5D3 state of La2O2S:Eu reveals a strong temperature dependence from 11 to about 130 K

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f59b6ddf39c17310c577138a0e53e8f9
https://doi.org/10.1063/1.1148125

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Solar Energy, Collected, Concentrated, Transported, and Distributed as Light With No Energy Conversion Via a Hybrid Solar Lighting System

Autor: D. Duncan Earl, Melissa Voss Lapsa, L. Curt Maxey, Jeff D. Muhs, John D. Morris, Christina D Ward, David L. Beshears

Publikováno v: ASME 2007 Energy Sustainability Conference.

Hybrid solar lighting (HSL) is a technology in which sunlight is collected and distributed via optical fibers into the interior of buildings. Analogous to hybrid electric vehicles that use both batteries and internal combustion engines to power cars,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49a3dad5421f474c877e184ed1905366
https://doi.org/10.1115/es2007-36096

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Spectral Transmission of a Solar Collector and Fiber Optic Distribution Hybrid Lighting System

Autor: L. C. Maxey, James E. Parks, D. Duncan Earl, Melissa Voss Lapsa, David L. Beshears, Jeffrey D. Muhs

Publikováno v: ASME 2007 Energy Sustainability Conference.

Increased use of solar energy will reduce requirements for non-renewable energy sources such as fossil fuels and reduce associated greenhouse gas emissions. The benefits of replacing fossil-based energy with solar energy are often dependent on the ap

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9ae69315e0c6b75f1944498f6788c2af
https://doi.org/10.1115/es2007-36107

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Prototype Weigh-In-Motion Performance

Autor: David L. Beshears, Frederick T. Sheldon, Matthew B. Scudiere, Lee M. Hively, Robert K. Abercrombie

Oak Ridge National Laboratory (ORNL) has developed and patented methods to weigh slowly moving vehicles. We have used this technology to produce a portable weigh-in-motion system that is robust and accurate. This report documents the performance of t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cfe5b11d20c91f1669c244dbd84a0fae
https://doi.org/10.2172/931526

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First-generation hybrid solar lighting collector system development and operating experience

Autor: D. Duncan Earl, Shyler Switzer, L. Curt Maxey, Gary J Capps, David J. Bayless, Scott Stellern, Jeff D. Muhs, David L. Beshears

Publikováno v: SPIE Proceedings.

Research is underway at Oak Ridge National Laboratory (ORNL) that could lead to entirely new, highly energy-efficient ways of lighting buildings using the power of sunlight. In addition to providing light, the hybrid lighting system will convert sunl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3baa1d4febc9299a4f55df09ca97809b
https://doi.org/10.1117/12.509166

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