نتایج جستجو برای: ule
تعداد نتایج: 223 فیلتر نتایج به سال:
The Advanced Mirror Technology Development (AMTD) project is in Phase 2 of a multiyear effort initiated in Fiscal Year (FY) 2012, to mature the Technology Readiness Level (TRL) of critical technologies required to enable 4-m-orlarger monolithic or segmented ultraviolet, optical, and infrared (UVOIR) space telescope primary-mirror assemblies for general astrophysics, ultra-high-contrast observat...
In this paper we investigate the m s p o r t proses for rigid spherically symmetric macromolecules, having a segment densiry distribution falling off as rrA. We calculate the rotational and translational diffusion coefficient for P spbaically symmetric polymer and the shear viscosiiy for a dilute suspension of these molecules, s m i n g from a continuum description based on the Debye-Brink" equ...
We report the main characteristics and performances of the first – to our knowledge – prototype of an ultra-stable cavity designed and produced by industry with the aim of space missions. The cavity is a 100 mm long cylinder rigidly held at its midplane by an engineered mechanical interface providing an efficient decoupling from thermal and vibration perturbations. The spacer is made from Ultra...
We have demonstrated a compact, robust device for simultaneous absolute frequency stabilization of three diode lasers whose carrier frequencies can be chosen freely relative to the reference. A rigid ULE multicavity block is employed, and, for each laser, the sideband locking technique is applied. A small lock error, computer control of frequency offset, wide range of frequency offset, simple c...
The fifth chapter of the series about Rudolf Schlechter’s South-American orchids introduces us to those botanists and orchid collectors who travelled worked in Ecuador Peru supplied Schlechter with many new species he described. As previous chapters, biographies accomplishments these travellers are preceded by brief geographical historical outlines for each countries. It is worth mentioning tha...
Cyanobacterial blooms represent a significant environmental problem, threatening aquatic ecosystems worldwide. Caused by the eutrophication of water bodies and global climate change, these have altered freshwater worldwide during recent decades. Although cyanobacterial are typically caused blue-green cyanobacteria, which derive their color from phycocyanin pigment, other pigmented been frequent...
Context awareness is increasingly gaining applicability in interactive ubiquitous mobile computing systems. Each context-aware application has its own set of behaviors to react to context modifications. This paper is concerned with the context modeling and the development methodology for context-aware systems. We proposed a rule-based approach and use the adaption tree to model the adaption rul...
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