Titlebook: Wide-Gap Luminescent Materials: Theory and Applications; Stanley R. Rotman Book 1997 Springer Science+Business Media New York 1997 communi

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Luminescent Dopants,ransition metal ions of the most practical interest from the iron, rare-earths, and actinides groups will be described. The processes involved in the conversion of the initial pump excitation to electron excitation, in particular intracenter transitions, interionic interactions, quenching and sensit

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The Effect of Defects on Inorganic Luminescent Materials, in the optical and electrical properties of these crystals..In this chapter, we will present optical and electrical techniques to determine the defect state of a crystal host and its luminescent dopants. First, we will consider how electrical conductivity measurements can determine the defect struc

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Inorganic Scintillators,non of scintillation has not been the beneficiary of any unifying comprehensive theoretical support, nor have scintillator materials shown any consistent systematics. Nevertheless, such materials have found wide use in such diverse technological areas as medical radiology (PET), high-energy physics,

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Rare Earth-Doped Fiber Lasers and Amplifiers,t of optical communication systems. In this chapter, we review the methods of producing these fibers and the effect of the host composition and the rare earth doping on the quality of the final product. We then review the physics of the dopants and the hosts involved which makes these doped fibers s

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Computing Machinery and Intelligences “machine” and “think” are to be found by examining how they are commonly used it is difficult to escape the conclusion that the meaning and the answer to the question, “Can machines think?” is to be sought in a statistical survey such as a Gallup poll.

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Dokumentarische Rekonstruktion und geschlechtertheoretische Dekonstruktion: Triangulation theoretischer und methodologischer Perspektiven in Forschungsprozessentradition und den ihnen oft zugeschriebenen qualitativen Interpretationsoperationen – der Rekonstruktion sowie der Dekonstruktion – wird anhand von zwei Forschungsprojekten diskutiert, welche Chancen und Risiken entlang verschiedener Phasen des Forschungsprozesses mit einem solchen triangulativen Vorgehen einhergehen.

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Oligochaeta in , stems: the microdistribution of Enchytraeidae and Tubificidae in a salt marsh, Sapein salt marsh habitats are increased dramatically when the numbers of worms on stems are considered. Possible advantages of the stem microhabitat are discussed in relation to the biology and ecology of oligochaetes.