Results 11 to 20 of about 729,138 (319)
Proceedings of the National Academy of Sciences, 2001 Recent progress in black hole research is illustrated by three examples. We discuss the observational challenges that were met to show that a supermassive black hole exists at the center of our galaxy. Stellar-size black holes have been studied in x-ray binaries and microquasars.
Brügmann, B., Ghez, A., Greiner, J.
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The Electronic Journal of Combinatorics, 2001 The celebrated Regularity Lemma of Szemerédi asserts that every sufficiently large graph $G$ can be partitioned in such a way that most pairs of the partition sets span $\epsilon$-regular subgraphs. In applications, however, the graph $G$ has to be dense and the partition sets are typically very small.
Yuejian Peng +2 more
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Mechanisms for the creation of intrinsic electron-hole trapping centers in a CaSO4 crystall
Eurasian Journal of Physics and Functional Materials, 2021 The mechanism of creation of electron-hole trapping centers in CaSO4 at 15-300 K was investigated by the methods of vacuum-ultraviolet and thermoactivation spectroscopy. It is shown that electron-hole trapping centers are formed upon trap of electrons in
T.N. Nurakhmetov +7 more
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Intrinsic emission and electron-hole trapping centers in crystals Li2SO4-Cu
Eurasian Journal of Physics and Functional Materials, 2021 In the present work, the emission and excitation spectra in Li2SO4-Cu crystals have been obtained by the methods of vacuum-ultraviolet and thermoactivation spectroscopy.
T.N. Nurakhmetov +10 more
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Hole dynamics and effective hole-hole interaction in a quantum antiferromagnet [PDF]
Physical Review B, 1991 Etude de la dynamique des trous a l'aide d'un Hamiltonien effectif qui prend en compte la contrainte sur le deplacement des trous dans un antiferromagnetique quantique. On trouve qu'il existe une bande de quasiparticules dont la largeur est de l'ordre de J a la partie inferieure du spectre des trous.
, Xu, , Ting, , Lee
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Rotating “black holes” with holes in the horizon [PDF]
Physical Review D, 2006 Kerr-Schild solutions of the Einstein-Maxwell field equations, containing semi-infinite axial singular lines, are investigated. It is shown that axial singularities break up the black hole, forming holes in the horizon. As a result, a tube-like region appears which allows matter to escape from the interior without crossing the horizon.
A. Burinski +3 more
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Summary of investigations conducted in 1967 : Woods Hole Oceanographic Institution Woods Hole, Massachusetts [PDF]
, 1968 This collection of brief "summaries of investigations" has been prepared by the members of the research staff of the Woods Hole Oceanographic Institution and this volume is a continuation of our early traditions.
Woods Hole Oceanographic Institution, /
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Improving the Performance of SIW-based Leaky Wave Antenna using the Creation of an Entrance Hole [PDF]
International Journal of Research and Technology in Electrical IndustryIn this paper, the effect of input holes on the performance of leaky wave antennas(LWA) is investigated by presenting two designs based on the substrate integrated waveguide(SIW) structure.
Heshmat Noori, Seyed Vahab Al-Din Makki
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Deformability and Stability of Rectangular Sandwich Panels with Cuts under In-Plane Loading
Architecture and Engineering, 2016 In this work the method of defining the critical load for rectangular sandwich panels having within themselves definite length cuts in a direction parallel with one of their sides is described.
Gela Kipiani
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