Interference devices

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  • Any electromagnetic phenomenon capable of impairing the performance of a device, equipment or system, etc. An electromagnetic disturbance can be electromagnetic noise, an unwanted signal or a change in the propagation medium itself.

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  • Since 1970, optical fiber and optical communication technologies have been rapidly developing, causing a technology revolution in the communication industries. Due to much lower attenuation and interference, optical fiber has many advantages over existing copper wire in long-distance and high-demand applications. The revolution in communication industries also significantly reduces the prices of optical components and stimulates the development of optical fiber sensors.

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  • The book includes 17 chapters written by noted scientists and young researchers and dealing with various aspects of superconductivity, both theoretical and experimental. The authors tried to demonstrate their original vision and give an insight into the examined problems. A balance between theory and experiment was preserved at least from the formal viewpoint (9 and 8, respectively). The readers should be warned that many of the problems studied here are far from being solved and are treated on the basis of competing viewpoints.

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  • This paper presents a new design method for all-optical NAND and AND logic gates based on 3x3 general interference multimode interference (GI MMI) coupler. The whole device is realized on the silicon on insulator (SOI) platform. The transfer matrix method (TMM) and three dimensional beam propagation method (3D-BPM) are used to optimally design these devices. Key words: Optical logic gate, multimode interference (MMI) coupler, silicon on insulator (SOI), beam propagation method (BPM)

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  • This publication gives you general guidelines for installing an Allen-Bradley industrial automation system that may include programmable controllers, industrial computers, operator-interface terminals, display devices, and communication networks. While these guidelines apply to the majority of installations, certain electrically harsh environments may require additional precautions. Use these guidelines as a tool for helping avoid potential electromagnetic interference (emi) and transient emi that could cause problems such as “adapter faults, rack faults, communication faults,” etc.

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  • THIẾT KẾ THIẾT BỊ ĐA CHỨC NĂNG QUANG DỰA TRÊN BỘ GHÉP GIAO THOA ĐA MODE SỬ DỤNG CÔNG NGHỆ SILICON LÊ TRUNG THÀNH Bộ môn Kỹ thuật Viễn thông Khoa Điện - Điện tử Trường Đại học Giao thông Vận tải Tóm tắt: Trong bài báo này, chúng tôi đưa ra một phương pháp mới thiết kế thiết bị quang đa chức năng sử dụng bộ ghép giao thoa đa mode 3x3 MMI (multimode interference). Các bộ chia-ghép tín hiệu quang, các cổng OR, NOT, Ex-OR và NAND quang được thiết kế trên công nghệ Silicon.

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  • : This equipment has been tested and found to comply with the limits for a class digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.

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  • This volume includes papers presented at the XXII Solvay Conference on Physics, which took place from the 24 to 29 November 2001 in the European Culture Centre of Delphi. The Castle of Lamia hosted the events of the last day. The Physics of Communication was the selected theme of the conference. The 5 sessions reflected present challenging issues, namely Decoherence and Irreversibility, Non-locality and Superluminosity, Photonics, Quantum Information and Communication, Quantum Computation.

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  • Under the ADA, service animals must be harnessed, leashed, or tethered, unless these devices interfere with the service animal’s work or the individual’s disability prevents him from using these devices. Individuals who cannot use such devices must maintain control of the animal through voice, signal, or other effective controls. Businesses may exclude service animals only if 1) the dog is out of control and the handler cannot or does not regain control; or 2) the dog is not housebroken.

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  • Studies have shown that radiation from cell phones has the potential to interfere with cardiopulmonary monitoring devices, and in some cases may even cause malfunction of patient ventilators1. Such evidence would seem to indicate that cell phones constitute a significant risk to patient health and safety, warranting their ban from hospital facilities. But many of the same hospitals that are banning cell phones are, at the same time, bringing more and more wireless equipment into the hospital environment. Wireless Local Area Networks (LANs) are being installed at a rapid rate.

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  • Misalign- ment will lead to non-regular channels and thereforemay interfere with the bonding technique; in severe cases, it may lead to the destruction of the complete device. A correct alignment will lead to only small deviations fromthe desired elliptical shape, and the distortion while the bonding process takes place will be minimum. Align- ment techniques used to avoid errors can be simplemechanicalmethods (e.g. use of alignment pins), edge catches in a specially designed assembling device or optical methods such as laser alignment.

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