Pyroelectric detectors Pyroelectric Infrared Detectors (PIR)convert the changes in incoming infrared light to electric signals. Pyroelectric materials are characterized by having spontaneous electric polarization, which is altered by temperature changes as infrared light illuminates the elements. Since our sensor series uses this effect they can be used at ambient temperature even in the presence of thermal noise. By choosing appropriate IR receiving electrodes
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Film Form and Analysis Cinematography Cinematography describes the process by which a film strip is exposed to light to create an image. It encompasses many factors: the camera’s distance from the action, camera angle and direction, type of lens, camera movement, and lighting, among others. The art of cinematography also includes mise-en-scène—the arrangement of objects and movements in the frame. Shot Types The amount of visual information included in the image depends on the distance of the
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Computer Network A computer network is a group of computers that are interconnected by electronic circuits or wireless transmissions of various designs and technologies for the purpose of exchanging data or communicating information between them or their users. Networks may be classified according to a wide variety of characteristics. This article provides a general overview of types and categories and also presents the basic components of a network. Introduction A computer network allows sharing
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the annealed state) to 108-109 after a few percent deformation and up to 1011 -1012 lines/cm2 after heavy deformation. At a more macrostructural level, the grains become markedly elongated in the direction of working and heavily distorted. This distortion is evident from a bending of annealing twins and from unevenness in etching caused by local strain inhomogeneities. While the increased hardness and strength that result from the working operation can be important, it is often necessary to return
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THE APERTURE is referred to the lens diaphragm opening inside a photographic lens. The size of the diaphragm opening in a camera lens regulates amount of light passes through onto the film inside the camera the moment when the shutter is pressed in camera opens during an exposure process. The size of an aperture in a lens can either be a fixed or the most popular form in an adjustable type (like an SLR camera). Aperture size is usually calibrated in f-numbers or f-stops. i.e. those little
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Optical Distortion, Inc. (ODI) is the world’s first company to introduce contact lenses for chickens. These lenses offer farmers a unique cost saving opportunity and are more humane and efficient than the current de-beaking method. ODI, with help from New World Plastics has developed this commercially viable technology to reduce cannibalism by inducing astigmatism. With a patent holding off competition for at least three years, ODI needs to decide how to price contact lenses to ensure high adoption
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NOISE AND VIBRATION DAMPING OF Fe-Cr-X ALLOYS D.Pulino-Sagradi, M.Sagradi and J.L.Martin Débora Pulino-Sagradi (Contacting author) Departamento de Materiais Faculdade de Engenharia Mecânica Universidade Estadual de Campinas CEP 13083-970 , Campinas, S.P., Brazil Tel.: (019) 239-7966 * Fax: (019) 239-3722 Marcello Sagradi Département de Physique École Polytechnique Fédérale de Lausanne Switzerland Jean-Luc
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requirement, minimizes the loss of inorganic carbon through escaping CO2. The cells were grown in four different media (iron free, 30uM FeEDTA, 10um ferrous sulfate, and a combination of the two). The growth of the N oculata. was primarily measured using optical density testing during the logarithmic growth phase. After one week of growth the highest biomass density, 0.86, observed in the culture grown in 30uM ferric EDTA, was more than 2.5 times the lowest, 0.333, which was found in the culture containing
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CHAPTER 1 INTRODUCTION Even though modern technology has invested millions, even billions, into projection screen technology, high definition projectors, and even projectors for our cell phones, we have forgotten that we will always need something to project on. Unfortunately, with the tragic proliferation of advertising these days, we are probably looking at a future world where all the space on the buildings is taken for billboards and other various projected ads. The only place that would
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elements for a new format to succeed. This new format has arrived with the advent of Blu-ray Disc, the only format that offers a considerable increase in storage capacity with its 25 to 50 GB data capacity. This allows for the next big application of optical media: the distribution and recording of High Definition video in the highest possible quality. In fact, no other proposed format can offer the data capacity of Blu-ray Disc, and no other format will allow for the same high video quality and interactive
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