Results 131 to 140 of about 210,780 (201)
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Document Image Transmission by Telecommunication
Journal of Forensic Sciences, 1990Abstract Photophone® is an image-transmission device which uses telecommunications to transmit questioned documents for examination on an international scale. This instrument, now in use by the Department of Justice, Immigration and Naturalization Service (INS), is a combination video camera and monitor screen, high-power microscope ...
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Convergence of voice and data telecommunications transmissions
INTELEC. Twenty-Second International Telecommunications Energy Conference (Cat. No.00CH37131), 2002Our insatiable need for instant information will continue to make telecommunication systems an increasingly integral part of our society, demanding ever more services for real-time data and, of course, reliable networks. Mobility in society is key today, and the ability to be "always connected" is crucial not only to business people, but to the general
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Modeling telecommunications networks' transmission systems
IEEE Communications Magazine, 1996The author discusses the status of synchronous digital hierarchy (SDH) management standards and related matters such as plesiochronous digital hierarchy (PDH), and offers an overview of the information contained within these standards. He provides an overview of those areas that are still under study or need further investigation by international ...
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Telecommunication transmission: where are we heading?
Electronics and Power, 1985The future for the digital technologies of fibre optics, microwave radio and satellites seems assured. But in the quest for ever higher datarates what are their limitations?
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Telecommunications and data transmission
1992The term ‘telecommunications’ is used to describe all the methods which transmit information electronically. In the UK, the national telecommunications network is supplied by British Telecom. However, other companies are now providing and competing for specialised services. For example, Mercury has established some networks and services.
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Future trends in digital telecommunication transmission networks
Electronics & Communications Engineering Journal, 1990New technology is needed by digital transmission networks for the increased bandwidth, performance and reliability requirements of existing and future telecommunication services, such as broadband ISDN. Increased flexibility, automation and control are also major issues being addressed.
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Transmission Schemes For Optical Telecommunications In Space
SPIE Proceedings, 1989A theoretical investigation on optical transmission schemes for free-space applications is carried out. Receiver sensitivity of direct detection schemes like NRZ and QPPM (quaternary pulse position modulation) are evaluated. For bit rates between 10 and 65 Mbit/s, QPPM outperforms NRZ by up to 2.0 dB.
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Future trends in telecommunications transmission—a personal view
IEE Proceedings F Communications, Radar and Signal Processing, 1984After briefly tracing transmission system development to the present day, the paper goes on to consider the likely progression of both services and technology in the near and far future. To provide a clear focus for the discussion, a number of ‘end point’ developments and targets are postulated as the ultimate objectives of the transmission engineer ...
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Transmission facility planning in telecommunications networks: A heuristic approach
European Journal of Operational Research, 1984Abstract The transmission system cost functions can be decomposed—approximately—into a fixed charge part and linear cost part. These parts represent the initial investment cost of installing a transmission system on a specific link of the network and the cost of installing circuits of that system, respectively. We present a mixed integer programming (
Ilker Baybars, K. O. Kortanek
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Telecommunications and the Changing Geographies of Knowledge Transmission in the Late 20th Century
Urban Studies, 1995Recent innovations in telecommunications and computing, enhanced by a global wave of deregulation and the emergence of post-Fordist production regimes, have unleashed profound transformations of various service sectors in the global economy. This paper first reviews the geographical repercussions of the explosion of information services, including the
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