1,471 research outputs found

    Quasigroups, Asymptotic Symmetries and Conservation Laws in General Relativity

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    A new quasigroup approach to conservation laws in general relativity is applied to study asymptotically flat at future null infinity spacetime. The infinite-parametric Newman-Unti group of asymptotic symmetries is reduced to the Poincar\'e quasigroup and the Noether charge associated with any element of the Poincar\'e quasialgebra is defined. The integral conserved quantities of energy-momentum and angular momentum are linear on generators of Poincar\'e quasigroup, free of the supertranslation ambiguity, posess the flux and identically equal to zero in Minkowski spacetime.Comment: RevTeX4, 5 page

    Smooth Loops and Fiber Bundles: Theory of Principal Q-bundles

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    A nonassociative generalization of the principal fiber bundles with a smooth loop mapping on the fiber is presented. Our approach allows us to construct a new kind of gauge theories that involve higher ''nonassociative'' symmetries.Comment: 20 page

    Development of the procedure of testing with the application of the expert evaluation method in psychophysiology

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    This article provides a detailed description of the stages of development of an information system of personalized psychophysiological testing using expert evaluation. The process of the information system design is presented, the developed functional models, database and algorithm of testing by students-experts are demonstrate

    Assessment of psycho-emotional state of student with Mitral regurgitation and possible ways of its pharmacological correction

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    The article presents the results of psycho-emotional state assessment a person with Mitral regurgitation when he lies using the device for the physiological parameter record, and the possible ways of its pharmacological correction are offere

    Algebraic Model for scattering of three-s-cluster systems. II. Resonances in the three-cluster continuum of 6He and 6Be

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    The resonance states embedded in the three-cluster continuum of 6He and 6Be are obtained in the Algebraic Version of the Resonating Group Method. The model accounts for a correct treatment of the Pauli principle. It also provides the correct three-cluster continuum boundary conditions by using a Hyperspherical Harmonics basis. The model reproduces the observed resonances well and achieves good agreement with other models. A better understanding for the process of formation and decay of the resonance states in six-nucleon systems is obtained.Comment: 8 pages, 10 postscript figures, submitted to Phys. Rev.

    Structure and crystallographic texture in the Cu-Cr-Ag alloy subjected to severe plastic deformation

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    © 2014 Advanced Study Center Co. Ltd. In this paper the effect of severe plastic deformation (SPD) on the structure and crystallographic texture in the Cu-Cr-Ag copper alloy have been investigated. In ultrafine-grained (UFG) samples processed by high pressure torsion (HPT), equal channel angular pressing (ECAP) and ECAP-Conform (ECAP-C) the average size of grains and precipitates was determined. Experimental pole figures (PF) have been obtained and the relevant crystallographic texture was evaluated. The effect of dynamic aging in the Cu-Cr-Ag alloy leading to improvement of strength and electrical conductivity was observed

    From Multi-Sensors Observations Towards Cross-Disciplinary Study of Pre-Earthquake Signals. What have We Learned from the Tohoku Earthquake?

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    The lessons we have learned from the Great Tohoku EQ (Japan, 2011) how this knowledge will affect our future observation and analysis is the main focus of this presentation.We present multi-sensors observations and multidisciplinary research in our investigation of phenomena preceding major earthquakes. These observations revealed the existence of atmospheric and ionospheric phenomena occurring prior to theM9.0 Tohoku earthquake of March 11, 2011, which indicates s new evidence of a distinct coupling between the lithosphere and atmosphere/ionosphere, as related to underlying tectonic activity. Similar results have been reported before the catastrophic events in Chile (M8.8, 2010), Italy (M6.3, 2009) and Sumatra (M9.3, 2004). For the Tohoku earthquake, our analysis shows a synergy between several independent observations characterizing the state of the lithosphere /atmosphere coupling several days before the onset of the earthquakes, namely: (i) Foreshock sequence change (rate, space and time); (ii) Outgoing Long wave Radiation (OLR) measured at the top of the atmosphere; and (iii) Anomalous variations of ionospheric parameters revealed by multi-sensors observations. We are presenting a cross-disciplinary analysis of the observed pre-earthquake anomalies and will discuss current research in the detection of these signals in Japan. We expect that our analysis will shed light on the underlying physics of pre-earthquake signals associated with some of the largest earthquake event

    Multi-Sensors Observations of Pre-Earthquake Signals. What We Learned from the Great Tohoku Earthquake?

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    The lessons learned from the Great Tohoku EQ (Japan, 2011) will affect our future observations and an analysis is the main focus of this presentation. Multi-sensors observations and multidisciplinary research is presented in our study of the phenomena preceding major earthquakes Our approach is based on a systematic analysis of several physical and environmental parameters, which been reported by others in connections with earthquake processes: thermal infrared radiation; temperature; concentration of electrons in the ionosphere; radon/ion activities; and atmospheric temperature/humidity [Ouzounov et al, 2011]. We used the Lithosphere-Atmosphere-Ionosphere Coupling (LAIC) model, one of several possible paradigms [Pulinets and Ouzounov, 2011] to interpret our observations. We retrospectively analyzed the temporal and spatial variations of three different physical parameters characterizing the state of the atmosphere, ionosphere the ground surface several days before the March 11, 2011 M9 Tohoku earthquake Namely: (i) Outgoing Long wave Radiation (OLR) measured at the top of the atmosphere; (ii) Anomalous variations of ionospheric parameters revealed by multi-sensors observations; and (iii) The change in the foreshock sequence (rate, space and time); Our results show that on March 8th, 2011 a rapid increase of emitted infrared radiation was observed and an anomaly developed near the epicenter with largest value occurring on March 11 at 07.30 LT. The GPS/TEC data indicate an increase and variation in electron density reaching a maximum value on March 8. Starting from this day in the lower ionosphere there was also observed an abnormal TEC variation over the epicenter. From March 3 to 11 a large increase in electron concentration was recorded at all four Japanese ground-based ionosondes, which returned to normal after the main earthquake. We use the Japanese GPS network stations and method of Radio Tomography to study the spatiotemporal structure of ionospheric perturbations, and to distinguish ionospheric responses to processes of EQ preparation against the effects of other factors. The 2-D snapshots of the electron density over Japan showed abnormal increase over the maximum stress during the night, a few hours before the main shock. Our results from recording atmospheric and ionospheric conditions during the earthquake indicate the presence of anomalies in the atmosphere and ionospheres occurring consistently over regions of maximum stress near the epicenter. Due to their long duration (hours and days) and spatial appearance (only over the Sendai region) these results do not appear to be caused by meteorological or magnetic activity. They reveal the existence of atmospheric and ionospheric phenomena occurring prior to the earthquake, which indicates new evidence of a distinct coupling between the lithosphere and atmosphere/ionosphere. Similar results have been reported before the catastrophic events in Chile (M8.8, 2010), Italy (M6.3, 2009) and Sumatra (M9.3, 2004)

    Общенаучная категория следа: судебно-экспертный аспект

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    The purpose of the research is to analyze the general scientific category of a trace as the fundamental one to formulate the modern legal category of a forensically relevant trace. The article provides a brief review of the views of scientists who have studied the properties of the general scientific category of a trace. The general scientific category of a trace is presented as a characteristic describing and explaining a trace’s properties. The author emphasizes the necessity to distinguish real and existing traces-signs from traces-ideas. The so-called ideal traces are analyzed. The article provides the classification of such traces. The classification recognizes the traces of memory as the traces of memorization, traces of storage and traces of recollection, and mental traces. It is suggested to pay attention to electronic data traces, virtual data traces, and digital data traces.Цель исследования – проанализировать общенаучную категорию следа как базовую для формулирования современной правовой категории криминалистически значимого следа. Проведен краткий обзор воззрений ученых, исследовавших свойства общенаучной категории следа. Представлена общенаучная категория следа как характеристика, описывающая и объясняющая свойства следа. Выделена необходимость разделять действительные и существующие следы в виде следов-знаков и/или следов-идей. Анализу подверглись так называемые идеальные следы. Осуществлена классификация таких следов, выделены следы памяти как следы-запоминания, следы-хранения и следы-воспоминания, а также умственные следы. Предложено обратить внимание на электронные следы-данные, виртуальные следы-данные и/или цифровые следы-данные
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