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In summer 1977, ESA placed the first technological study contract in the domain of intersatellite optical links. Now, twenty years later, a major milestone has been reached with the SILEX laser terminals having been flight tested for integration with their host spacecraft. At the same time, ESA is preparing itself for a new challenge: the potential massive use of optical cross links in satellite constellations for mobile communications and global multimedia services. This is an opportune moment to look back at the past twenty years of ESA effort in laser communications, to take stock of the results achieved and to reflect on ways to face the challenges of the future.

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Genomic Signal Processing (GSP) is the engineering discipline that studies the processing of genomic signals.The theory of signal processing is utilized in both structural and functional understanding. The aim of GSP is to integrate the theory and methods of signal processing with the global understanding of functional genomics, with special emphasis on genomic regulation.

Gene prediction typically refers to the area of computational that is concerned with algorithmically identifying biology genomic DNA, that are stretches of sequence, usually biologically functional. This especially includes protein-genes, but may also include other functional coding RNA genes and regulatory regions. Gene elements such as finding is one of the first and most important steps in understanding the genome of a species once it has been sequenced.

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Human cognition depends primarily on the ability to perceive, interpret, and integrate audio-visuals and sensoring information. Adding extraordinary perceptual abilities to computers would enable computers to work together with human beings as intimate partners.Read more..

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WiDEN enhanced specialized mobile radio (or ESMR) wireless telephony protocol of Motorola employs this software upgrade developed by the company. In a WiDEN or Wideband Integrated Dispatch Enhanced Network by applying a bandwidth of 100 kbit/s the subscriber can communicate over four 25 kHz channels. The iM240 PCMCIA card that can transmit the data at a speed of 60 kbit/s was the first WiDEN-compatible device to be released by Motorola. Unveiled in mid-summer 2005, the first WiDEN-compatible telephones, the motorola i850 and the i760 used the software upgrade of i850/i760 which puts them in the WIDEN network. The Motorola i870 c, released on 31 October 2005, made possible the commercial launch of WiDEN. Today this new technology is widely used in Nextel s National Network.

Update: Since the Sprint Nextel merger the company determined that because Sprint s CDMA network was already 3G and going to EVDO (broadband speeds) and then EVDO Rev A (T-1 speeds) it would be redundant to keep upgrading the IDEN data network.

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The invention of new fluorescence-based chemical sensor has facilitated the myriad potential applications such as monitoring oxygen, inorganic gases, volatile organic compounds, biochemical compounds etc, as the technology is versatile, compact and inexpensive in nature. Depending upon the vital criteria’s of accuracy, precision, cost and the ability to meet the environmental range of the intended application, proper sensor can be chosen for the military control based subsystem. Sensor web and video sensor technology are two widely applied sensor techniques, in which Sensor Web is a type of sensor network or geographic information system (GIS) well suited for environmental monitoring and control, where as video sensor technology is used for digital image analysis. In sensor web technology, we have a wirelessly connected shapeless network of unevenly distributed sensor platform or pods, which is very much different from the TCP/IP-like network with respect to its synchronous and router-free nature.Read more..

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Optical switching enables routing of optical data signals without the need for conversion to electrical signals and, therefore, is independent of data rate and data protocol.Optical Burst Switching (OBS) is an attempt at a new synthesis of optical and electronic technologies that seeks to exploit the tremendous bandwidth of optical technology, while using electronics for management and control.

In an OBS network the incoming IP traffic is first assembled into bigger entities called bursts. Bursts, being substantially bigger than IP packets are easier to switch with relatively small overhead. When a burst is ready, reservation request is sent to the core network. Transmission and switching resources for each burst are reserved according to the one-pass reservation scheme, i.e. data is sent shortly after the reservation request without receiving an acknowledgement of successful reservation.Read more..

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