The Experts below are selected from a list of 7002 Experts worldwide ranked by ideXlab platform
S. T. Lawes - One of the best experts on this subject based on the ideXlab platform.
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A high-performance Analogue Input/output system for transputer applications
Microprocessors and Microsystems, 1995Co-Authors: J. R. Elphick, Tim Clarke, S. T. LawesAbstract:Abstract The paper describes a low-cost, multi-channel Analogue transputer interface with the capacity to service each of 16 Input/output pairs at up to a 7 kHz sample rate. Fewer channels may be sampled at a concomitant higher frequency and multi-rate sampling is possible. The interface provides four Inmos links for connection to other transputers. Therefore, network topology remains flexible, as minimal limitations are imposed by the Input/output system. Although several interface systems are commercially available, to the authors' knowledge, no competitively-priced packages offer the resolution and speed required.
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a high performance Analogue Input output system for transputer applications
Microprocessors and Microsystems, 1995Co-Authors: J. R. Elphick, Tim Clarke, S. T. LawesAbstract:Abstract The paper describes a low-cost, multi-channel Analogue transputer interface with the capacity to service each of 16 Input/output pairs at up to a 7 kHz sample rate. Fewer channels may be sampled at a concomitant higher frequency and multi-rate sampling is possible. The interface provides four Inmos links for connection to other transputers. Therefore, network topology remains flexible, as minimal limitations are imposed by the Input/output system. Although several interface systems are commercially available, to the authors' knowledge, no competitively-priced packages offer the resolution and speed required.
Vladimir Terzija - One of the best experts on this subject based on the ideXlab platform.
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Effective Two-terminal Numerical Algorithm for Overhead Lines Protection
Electrical Engineering, 2007Co-Authors: Zagorka Radojević, Vladimir TerzijaAbstract:In the paper an effective numerical algorithm for overhead lines protection, particularly fault location and adaptive autoreclosure, is presented. It is based on the two terminal line currents and voltages acquisition. For this purposes the synchronized sampling of all Analogue Input variables, i.e. the application of the Global Position System/Phasor Measurement Units, was assumed. The algorithm presented is derived in the spectral domain. By this the set of third harmonics variables and line parameters was also used. The prerequisite for successfully adaptive autoreclosure functionality realization was the suitable modelling of the electrical arc. Arc was considered as a source of higher harmonics, distorting by this other electrical variables. In the arc modelling, results of laboratory testing were used. Algorithm is tested for a typical network configuration, assuming by this that the line considered was short enough to neglect its capacitive nature. Based on the results obtained, it is very realistic that the algorithm presented could be implemented in praxis in modern Intelligent Electronic Devices (IEDs).
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Two Terminals Numerical Algorithm for Fault Distance Calculation and Fault Analysis
2006 IEEE PES Power Systems Conference and Exposition, 2006Co-Authors: Z.m. Radojevic, Vladimir TerzijaAbstract:In the paper a new numerical algorithm for fault distance calculation and fault analysis is presented. The algorithm improves up to date solutions with regard to the fault location, adaptive autoreclosure, detailed disturbance records analysis, and fault data management. It is based on two terminal line currents and voltages acquisition. For this purposes the synchronized sampling of all Analogue Input variables is assumed. The algorithm presented is derived in spectral domain and based on the application of the discrete Fourier transform. In the paper the electrical arc is considered as a source of higher harmonics. These are included in the complete fault model, which was starting point for the development of the new algorithm. One of sophisticated algorithm features is its ability to determine both the arc and the fault resistance. The algorithm is tested through computer based simulation of an overhead line connected to two active networks
A. Malik - One of the best experts on this subject based on the ideXlab platform.
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Improved Two-Terminal Silicon Functional Optical Sensor
Modern Physics Letters B, 2001Co-Authors: A. Malik, M. AcevesAbstract:The modelling of two-terminal silicon-based multi-layered functional photosensor that operates at low-voltage bias is presented. The devices developed do not require external active electronic components (transistors, microminiature circuits, etc) to execute their functions. Neither to transform Analogue Input optical signals to digital output form that is very important for a wide range of optoelectronic applications.
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Silicon active optical sensors : from functional photodetectors to smart sensors
Sensors and Actuators A-physical, 1998Co-Authors: A. Malik, Rodrigo MartinsAbstract:Abstract We have developed new types of functional and smart optical silicon sensors, based on ITO/multichannel insulator/silicon structures, which are able to execute electronic functions such as amplifying the photocurrent (without avalanche multiplication), transforming the Input optical signal into a radio frequency output signal and transforming the Analogue Input optical signal to a digital output form, without external active electronic components. These new functional optical sensors allow a substantial simplification of the registration of optical signals as well as of the electronic scheme to be used.
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Light-Controlled Switching Transients in Mis Silicon Structures with Multichannel Insulator: Physical Processes and New Device Modelling
MRS Proceedings, 1997Co-Authors: A. Malik, Rodrigo MartinsAbstract:ABSTRACTWe present the modelling of a new two-terminal and low-voltage operating optoelectronic device based on MIS silicon structure with multichannel insulator and having as gate a transparent metallic tin-doped indium oxide (ITO) layer deposited by spray pyrolysis technique over the insulator layer. ITO layer has a multiple non-rectifier electrical contact with silicon substrate, in the SiO2 channel's region. Construction details of the process, together with its operating characteristics are given. The devices developed do not require external active electronic components (transistors, microschemes) to execute their functions and to transform Analogue Input optical signals to digital output form, highly important for a wide range of optoelectronic applications.
Rodrigo Martins - One of the best experts on this subject based on the ideXlab platform.
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Silicon active optical sensors : from functional photodetectors to smart sensors
Sensors and Actuators A-physical, 1998Co-Authors: A. Malik, Rodrigo MartinsAbstract:Abstract We have developed new types of functional and smart optical silicon sensors, based on ITO/multichannel insulator/silicon structures, which are able to execute electronic functions such as amplifying the photocurrent (without avalanche multiplication), transforming the Input optical signal into a radio frequency output signal and transforming the Analogue Input optical signal to a digital output form, without external active electronic components. These new functional optical sensors allow a substantial simplification of the registration of optical signals as well as of the electronic scheme to be used.
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Light-Controlled Switching Transients in Mis Silicon Structures with Multichannel Insulator: Physical Processes and New Device Modelling
MRS Proceedings, 1997Co-Authors: A. Malik, Rodrigo MartinsAbstract:ABSTRACTWe present the modelling of a new two-terminal and low-voltage operating optoelectronic device based on MIS silicon structure with multichannel insulator and having as gate a transparent metallic tin-doped indium oxide (ITO) layer deposited by spray pyrolysis technique over the insulator layer. ITO layer has a multiple non-rectifier electrical contact with silicon substrate, in the SiO2 channel's region. Construction details of the process, together with its operating characteristics are given. The devices developed do not require external active electronic components (transistors, microschemes) to execute their functions and to transform Analogue Input optical signals to digital output form, highly important for a wide range of optoelectronic applications.
J. R. Elphick - One of the best experts on this subject based on the ideXlab platform.
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A high-performance Analogue Input/output system for transputer applications
Microprocessors and Microsystems, 1995Co-Authors: J. R. Elphick, Tim Clarke, S. T. LawesAbstract:Abstract The paper describes a low-cost, multi-channel Analogue transputer interface with the capacity to service each of 16 Input/output pairs at up to a 7 kHz sample rate. Fewer channels may be sampled at a concomitant higher frequency and multi-rate sampling is possible. The interface provides four Inmos links for connection to other transputers. Therefore, network topology remains flexible, as minimal limitations are imposed by the Input/output system. Although several interface systems are commercially available, to the authors' knowledge, no competitively-priced packages offer the resolution and speed required.
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a high performance Analogue Input output system for transputer applications
Microprocessors and Microsystems, 1995Co-Authors: J. R. Elphick, Tim Clarke, S. T. LawesAbstract:Abstract The paper describes a low-cost, multi-channel Analogue transputer interface with the capacity to service each of 16 Input/output pairs at up to a 7 kHz sample rate. Fewer channels may be sampled at a concomitant higher frequency and multi-rate sampling is possible. The interface provides four Inmos links for connection to other transputers. Therefore, network topology remains flexible, as minimal limitations are imposed by the Input/output system. Although several interface systems are commercially available, to the authors' knowledge, no competitively-priced packages offer the resolution and speed required.