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Lifetime Measurement of Cold Atoms in an Integrating Sphere

Chinese Physics Letters 2009年第8期26卷 119-121页

作者：张文卓王旭成成华东肖玲刘亮王育竹 Key Laboratory of Quantum Optics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800 Graduate University of the Chinese Academy of Sciences Beijing 100049

We present an experimental measurement of the lifetime of the cold ^87 Rb atoms in an integrating sphere. The atoms are cooled by the diffuse light which is generated by the diffuse reflection of laser beams in the integrating sphere. Our result shows that the lifetime is primarily determined by the free fall of the cold ^87Rb atoms, and its half-life can reach 40 ms, which is suitable for many experiments, especially for a cold atom clock.

关键词： physical measurements RUBIDIUM isotopes REFLECTION (Optics) LASER beams HALF-life (Nuclear physics) ATOMIC clocks

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Impact of Workspace Design in Indian Context on Occupant＇s Behavior, to Enhance Efficiency and Comfort

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Journal of Civil Engineering and Architecture 2013年第3期7卷 310-322页

作者： Pooja Mukund Pathak Alpana Rajendra Dongre Department of Architecture and Planning Visvesvaraya National Institute of Technology Nagpur 440015 India

The environmental psychology ofa workspace is a rich and diverse field of study that is growing fast and gaining popularity. The indoor environmental factors in workspaces should follow functional as well as behavioral requirements as the spaces are designed as per the user＇s requirements, needs and aspirations. These play a major role in achieving behavioral impact on the user, as sense of well-being in the environment and physical comfort in the space enhances the productivity and efficiency of the user of the space. The slow and gradual importance of this issue in workspace design with Indian context, post occupancy evaluation can be adjudged as a permanent tool for improving indoor environment in buildings. Occupants should be used as a benchmark of evaluation, showing correlation of physical measurements and subjective parameters. It also suggests recommendations to improve quality of indoor environment in office buildings with analytical study, an important step in post occupancy evaluation. The objective of the paper is to inquire how people experience environmental psychology of the workspace as the determinants are efficiency, productivity and comfort. The success of any design depends upon the degree to which it creates an interface between the user and the environment.

关键词： Workspace physical measurements behavioral parameters efficiency comfort quantity quality

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