The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
M Vukcevic - One of the best experts on this subject based on the ideXlab platform.
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the influence of dissipation range power spectra and plasma wave polarization on cosmic ray scattering mean free path
The Astrophysical Journal, 2010Co-Authors: R Schlickeiser, M Lazar, M VukcevicAbstract:The influence of the polarization state and the dissipation range spectral steepening of slab plasma waves on the scattering mean free path of single-charged cosmic-ray particles is investigated in a turbulence model, where the crucial scattering of cosmic-ray particles with small pitch-angle cosines is caused by resonant cyclotron interactions with slab plasma waves. Analytical expressions for the mean free path of protons, antiprotons, Negatrons, and positrons are derived for the case of constant frequency-independent magnetic helicity values ? and different values of the dissipation range spectral index k for characteristic interplanetary and interstellar plasma conditions. The positron mean free path is not affected by the dissipation range spectral index k as these particles can only cyclotron-resonate for rigidity values larger than R 0 = mpc = 938?MV. Proton and antiproton mean free paths are only slightly affected by the dissipation range spectral index k at small rigidities R < R 0. The negatron mean free path is severely affected by the dissipation range spectral index k at rigidities smaller than R 0. At high rigidities R R 0, all particle species approach the same power-law dependence R 2?s determined by the inertial range spectral index s = 5/3. The magnetic helicity value ? affects the value of the mean free path. At all rigidities, the ratio of the antiproton to proton mean free paths equals the constant (1 + ?)/(1 ? ?), which also agrees with the ratio of the negatron to the proton and positron mean free paths at relativistic rigidities. At relativistic rigidities the positron and proton mean free paths agree, as do the negatron and antiproton mean free paths.
Frederic Gilbert - One of the best experts on this subject based on the ideXlab platform.
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a lightweight double negation translation
International Conference on Logic Programming, 2015Co-Authors: Frederic GilbertAbstract:Deciding whether a classical theorem can be proved constructively is a well-known undecidable problem. As a consequence, any computable double-negation translation inserts some unnecessary double negations. This paper shows that most of these unnecessary insertions can be avoided without any use of constructive proof search techniques. For this purpose, we restrict the analysis to syntax-directed double-negation translations, which translate a proposition through a single traversal – and include most of the usual translations such as Kolmogorov's, Godel-Gentzen's, and Kuroda's. A partial order among translations are presented to select translations avoiding as many double negations as possible. This order admits a unique minimal syntax-directed translation with noticeable properties.
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LPAR (short papers) - A Lightweight Double-negation Translation
2015Co-Authors: Frederic GilbertAbstract:Deciding whether a classical theorem can be proved constructively is a well-known undecidable problem. As a consequence, any computable double-negation translation inserts some unnecessary double negations. This paper shows that most of these unnecessary insertions can be avoided without any use of constructive proof search techniques. For this purpose, we restrict the analysis to syntax-directed double-negation translations, which translate a proposition through a single traversal – and include most of the usual translations such as Kolmogorov's, Godel-Gentzen's, and Kuroda's. A partial order among translations are presented to select translations avoiding as many double negations as possible. This order admits a unique minimal syntax-directed translation with noticeable properties.
Alexander A. Lazarev - One of the best experts on this subject based on the ideXlab platform.
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Optoelectronic neuron on c-negatron
Photonics Applications in Astronomy Communications Industry and High-Energy Physics Experiments 2018, 2018Co-Authors: Alexander A. Lazarev, Olga Ussatova, Jacek KlimekAbstract:Optoelectronic neuronal element on the n-type c-negatron is researched in paper. the offered neuron executes the main functions of neuron, such as spatial and temporal integration of optical (current) signals and has a threshold function of activating. theoretical basis of neuronal elements construction on the c-Negatrons and computer simulations results of the neuron on the n-type c-negatron are shown in paper. advantages of the offered neuron element are schematic and technological simplicity, high speed, possibility of signal voltage amplification, low power consumption.
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Research of a filter on the parallel contour on L-, C-Negatrons
Photonics Applications in Astronomy Communications Industry and High Energy Physics Experiments 2017, 2017Co-Authors: Alexander A. Lazarev, Elena V. Voytsekhovskaya, Aron Burlibay, T. Zyska, Baglan Imanbek, Żaklin M. GrądzAbstract:In the paper a filter on the parallel resonant circuit on L-, C-Negatrons is suggested. The parallel resonant circuit on L-, C-Negatrons is investigated. Stability of the contour and frequency characteristics are considered. Experimental researches of the contour on the circuitry analogues of Negatrons are conducted. Use of L-, C-Negatrons improves the frequency-selective properties of the filter. Simulation of the filter on circuitry analogues of L-, C-Negatrons on operational amplifiers LF400C is done. The simulation results showed improvement of frequency selectivity of the filter characteristics by reducing the phase distortion.
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Smart negasensor on C-Negatrons
2013Co-Authors: N. A. Filinyuk, Alexander A. Lazarev, A. V. Prikmeta, D. V. BondaryukAbstract:Developed and studied the intellectual negasensor scheme which is based on the matrix of capacitive autogenerating RC-negasensors and neural network on Negatrons. It is shown that with corresponding learning of the neural network, the smart sensor is able to detect the texture and shape of the object's surface. The negative capacitance of C-negatron increases the sensitivity of the sensor 2 - 5 times and the neural network on Negatrons includes a little number of transistors.
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Capacitive negasensor with frequency output
2013 International Siberian Conference on Control and Communications (SIBCON), 2013Co-Authors: Nicholas A. Filynyuk, Denys V. Bondaryuk, Alexander A. Lazarev, Andrew V. PrykmetaAbstract:Using of C-Negatrons (devices with negative capacitance) allows increasing a sensitivity of analog and frequency capacitive sensors and, correspondingly, accuracy of non-electrical values measurement. The paper considers capacitive sensor array with frequency output on C-Negatrons, which has large sensitivity and simple implementation.
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Neural network based on the Negatrons
2013 International Siberian Conference on Control and Communications (SIBCON), 2013Co-Authors: Nicholas A. Filynyuk, Denys V. Bondaryuk, Alexander A. Lazarev, Andrew V. PrykmetaAbstract:Artificial neural networks are widely used for building intelligent control systems, pattern recognition, prediction, optimization, diagnosis, clustering, associative memory and so on. Today there are many different options for implementing artificial neurons. Complex physical models of artificial neurons can most accurately reflect all processes functioning of biological neurons, however, they contain a large number of elements and the creation of large arrays of neurons is a complicated technical task. An alternative approach is to create the simplest possible hardware implementations of artificial neurons with preservation of the main functions of the neuron. Promising element base for creating these neurons are functional electronic devices, including R-, L-, C-negatron which use will provide the circuitry simplicity, high reliability, economy, technology, small size and weight [1].
N. A. Filinyuk - One of the best experts on this subject based on the ideXlab platform.
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short historical review of development of scientific branch negatronics
Aeu-international Journal of Electronics and Communications, 2014Co-Authors: N. A. Filinyuk, A A LazarevAbstract:Abstract Main stages of development of negatronics are considered in the article. The review is based on the analysis of research results in the branch of creations of Negatrons and devices based on Negatrons which use various physical effects in gas, vacuum and semiconductors. Merits and demerits of designed Negatrons are generalized. Roles of various scientific trends in the area of negatronics are noted.
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Smart negasensor on C-Negatrons
2013Co-Authors: N. A. Filinyuk, Alexander A. Lazarev, A. V. Prikmeta, D. V. BondaryukAbstract:Developed and studied the intellectual negasensor scheme which is based on the matrix of capacitive autogenerating RC-negasensors and neural network on Negatrons. It is shown that with corresponding learning of the neural network, the smart sensor is able to detect the texture and shape of the object's surface. The negative capacitance of C-negatron increases the sensitivity of the sensor 2 - 5 times and the neural network on Negatrons includes a little number of transistors.
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Negatron in frequency-converter mode
Radio and communications technology, 1999Co-Authors: N. A. Filinyuk, P. A. Molchanov, E. V. VoitsekhovskayaAbstract:A nonlinear model of a transistor negatron taking account of interruption of the collector current and the current nonlinearity is described. The times at which the emitter junction is switched off and on are determined more accurately. A transistor negatron in frequency-converter mode is investigated. Numerical calculation of the characteristics is undertaken for the proposed model.
R Schlickeiser - One of the best experts on this subject based on the ideXlab platform.
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the influence of dissipation range power spectra and plasma wave polarization on cosmic ray scattering mean free path
The Astrophysical Journal, 2010Co-Authors: R Schlickeiser, M Lazar, M VukcevicAbstract:The influence of the polarization state and the dissipation range spectral steepening of slab plasma waves on the scattering mean free path of single-charged cosmic-ray particles is investigated in a turbulence model, where the crucial scattering of cosmic-ray particles with small pitch-angle cosines is caused by resonant cyclotron interactions with slab plasma waves. Analytical expressions for the mean free path of protons, antiprotons, Negatrons, and positrons are derived for the case of constant frequency-independent magnetic helicity values ? and different values of the dissipation range spectral index k for characteristic interplanetary and interstellar plasma conditions. The positron mean free path is not affected by the dissipation range spectral index k as these particles can only cyclotron-resonate for rigidity values larger than R 0 = mpc = 938?MV. Proton and antiproton mean free paths are only slightly affected by the dissipation range spectral index k at small rigidities R < R 0. The negatron mean free path is severely affected by the dissipation range spectral index k at rigidities smaller than R 0. At high rigidities R R 0, all particle species approach the same power-law dependence R 2?s determined by the inertial range spectral index s = 5/3. The magnetic helicity value ? affects the value of the mean free path. At all rigidities, the ratio of the antiproton to proton mean free paths equals the constant (1 + ?)/(1 ? ?), which also agrees with the ratio of the negatron to the proton and positron mean free paths at relativistic rigidities. At relativistic rigidities the positron and proton mean free paths agree, as do the negatron and antiproton mean free paths.
