Optical density

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  • This chapter presents the basic theory and characteristics of stimulated emission and optical amplification gain in semiconductors. The former is the mostimportant principlethat enablessemiconductorlaserstobeimplemented, and the latter is the most important parameter for analysis of the laser performances. First, stimulated emission in semiconductors is explained, and then quantum theory analysis and statistic analysis using the density matrix of the optical amplification gain are given.

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  • Rapid development of optoelectronic devices and laser techniques poses an important task of creating and studying, from one side, the structures capable of effectively converting, modulating, and recording optical data in a wide range of radiation energy densities and frequencies, from another side, the new schemes and approaches capable to activate and simulate the modern features. It is well known that nonlinear optical phenomena and nonlinear optical materials have the promising place to resolve these complicated technical tasks....

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  • PHÂN TÍCH ĐỊNH TÍNH VÀ ĐỊNH LƯỢNG NUCLEIC ACID 1. ĐIỆN DI - Gel agarose - Gel polyacrylamide 2. QUANG PHỔ KẾ : Đo mật độ quang (OD – Optical density) 13 ĐIỆN DI DNA TRÊN GEL AGAROSE - Điện di theo phương nằm ngang - Giá thể là gel agarose - Phát hiện với màu nhuộm ethidium bromide, ...

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  • A new type of semiconductor laser is studied, in which injected carriers in the active region are quantum mechanically confined in localized finite self-assembled wire-like quantumdash (Qdash) structures that are varied in sizes and compositions. Effects of such carrier distribution and quasi three-dimensional density of states contribute to a quasisupercontinuum interband lasing characteristics, which is a new laser design platform as compared to continuous broad emission spectrum generated by nonlinear media pumped with ultrashort laser pulse....

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  • This book is a collection of some of the invited talks presented at the international meeting held at the Max Planck Institut fiir Physik komplexer Systeme, Dresden, Germany during August 6-30, 2001, on the rapidly developing field of nanoscale science and bio-electronics (http://www.mpipks-dresden.mpg.de/~nanobio/). Semiconductor physics has experienced unprecedented developments over the second half of the twentieth century. The exponential growth in microelectronic processing power and the size of dynamic memories has been achieved by significant downscahng of the minimum feature size.

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  • ADC’s NG3® product line is Telcordia® GR-449-CORE, Issue 2 compliant and designed to meet today’s high-density network needs. Each frame option is designed with an emphasis on superior cable management and ease of use, including features such as ample trough space for cable and jumpers, easy access to connectors and storage for jumpers. The frame sections are shipped from the factory fully equipped with all cable management hardware including integrated jumper slack storage.

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  • ADC’s Data Center Optical Distribution Frame (ODF) with plug-and-play (MPO) cassettes is the highest density optical distribution frame solution available today. It efficiently manages up to 1,728 fiber terminations using the 144-position block (or 2,304 using the 192-position block) in a single frame in either a cross-connect or inter-connect design.

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  • ADC’s ruggedized high-density cables provide factory standard guaranteed performance specifications. They are 100% optically tested and are offered with a variety of optical performance levels Features: • 245/900 or 500/900 μm polyester buffer • Flame retardant polyurethane jacket • Extremely rugged • Superior abrasion resistance • Excellent performance at extreme temperature • Compatible with all industry standard connectors

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  • Today’s optical distribution frame (ODF) systems are already required to handle more fiber than ever before, but as bandwidth requirements skyrocket, the need for even higher fiber density continues to increase. Manufacturers are scrambling to develop higher-density equipment and systems that can accommodate higher and higher numbers of terminations in smaller and smaller areas.

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  • ADC has developed the OMX600® optical distribution frame to meet today‘s network demands. Designed with total front access, the OMX600 has five right-hand and five left-hand mounting positions and can be installed back-to-back or against a wall to save valuable office floor space. This high-density frame terminates and splices up to 576 fibers in a 600 mm x 300 mm (23.6" x 11.8") footprint.

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  • British Library Cataloguing in Publication Data Dickmanns, Ernst Dieter Dynamic vision for perception and control of motion 1. Computer vision - Industrial applications 2. Optical detectors 3. Motor vehicles - Automatic control 4. Adaptive control systems I. Title 629’.046 ISBN-13: 9781846286377 Library of Congress Control Number: 2007922344 ISBN 978-1-84628-637-7 e-ISBN 978-1-84628-638-4 Printed on acid-free paper

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  • ADC's OMX™ 600 optical distribution frame meets industry demands for a high-density, modular, front-access optical frame. Specially designed chassis and value-added modules allow service providers to incorporate optical splitters for circuit monitoring and video distribution. Value-added modules can also be configured with wavelength division multiplexing capabilities to increase transmission capacity over existing fiber lines. Various input and output interface options are available.

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  • One night in 1996, an unusually hard rain sent a wall of water onto the campus of Colorado State University (CSU) in Fort Collins, Colo. The flood gutted the ground floor and basement levels of 14 buildings, submerging main distribution frames in each building. Panels were ripped from walls, rooms filled with mud, patch cords floated away, and fiber optic cable filled with water. No one on campus was hurt but, needless to say, the network was down.

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  • Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Relationships between the intra-ring wood density assessed by X-ray densitometry and optical anatomical measurements in conifers. Consequences for the cell wall apparent density determination...

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  • This book is written for the practicing pharmaceutical scientist involved in absorption–distribution–metabolism–excretion (ADME) measurements who needs to communicate with medicinal chemists persuasively, so that newly synthesized molecules will be more ‘‘drug-like.’’ ADME is all about ‘‘a day in the life of a drug molecule’’ (absorption, distribution, metabolism, and excretion).

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  • Brillouin scattering was discovered in 1922 by Louis Brillouin [1]. It is one of a number of characteristic scattering phenomena that occur when light interacts with solid, liquid or gaseous media and corresponds to the scattering of light from thermally-induced acoustical waves (propagating pressure/density waves) present in media at all temperatures. At normal light levels the amount of scattering is small. The characteristics of the scattering can offer interesting information about the properties of the medium (temperature, pressure) and form the basis for remote fibre sensor devices.

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  • The effectiveness of screening in the NHSBSP is influenced by pro- gramme factors, such as the introduction of two views and the opti- misation of optical density, and also by population factors, such as the increasing use of hormone replacement therapy during the 1990s. The current NHSBSP saves an estimated 1400 lives each year in Eng- land. The NHSBSP now diagnoses about half of all breast cancers found in women in the target age range of 50–70 years, with the remainder occurring in women who do not attend for screening or who present symptomatically in the interval between screens.

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  • Optical-fiber bundles have been employed as a versatile substrate for the fabrication of high-density microwell arrays. In this minireview, we discuss the application of optical-fiber-bundle arrays for a variety of biological problems.

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  • Now the resist height upon developing must be calibrated to UV exposure energy, from which the optical density of the device features in the mask may be determined. To this end, the resist height that results from an optimized lithography process was calibrated with a range of optical densities from a reference mask. From this information, the device height profile is encoded into the optical density profile necessary to produce it.

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  • The photon - drag effect with optical phonon-electron scattering in rectangular quantum wire with an infinite potential is studied. Based on the quantum kinetic equation for electrons under the action of a linearly polarized electromagnetic wave, a dc electric field and an intense laser field, analytic expressions for the density of the direct current for the case of electron – optical phonon scattering are calculated.

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