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The nonohmic conductivity of 2D hole gas (2DHG) in single $GaAsIn_{0.2}Ga_{0.8}AsGaAs$ quantum well structures within the temperature range of 1.4 - 4.2K, the carrier's densities $p=(1.5-8)\cdot10^{15}m^{-2}$ and a wide range of…

无序系统与神经网络 · 物理学 2010-10-15 I. V. Soldatov , A. V. Germanenko , G. M Minkov , O. E. Rut , A. A. Sherstobitov

The microquasar LS 5039 has recently been detected as a source of very high energy (VHE) $\gamma$-rays. This detection, that confirms the previously proposed association of LS 5039 with the EGRET source 3EG~J1824$-$1514, makes of LS 5039 a…

天体物理学 · 物理学 2009-11-11 J. M. Paredes , V. Bosch-Ramon , G. E. Romero

The measurement of energy is a fundamental tool used, for example, in exploring the early universe, characterizing particle decay processes, as well as in quantum technology and computing. Some of the most sensitive energy detectors are…

A large fraction of Galactic very-high energy (VHE; E$\gtrsim$100 GeV) $\gamma$-ray sources is cataloged as unidentified. In this work we explore the possibility that these unidentified sources are located in ambients particularly rich in…

高能天体物理现象 · 物理学 2014-12-10 Giovanna Pedaletti , Emma de Oña Wilhelmi , Diego F. Torres , Giovanni Natale

In this study, a radial analytical model for methane hydrate dissociation upon thermal stimulation in porous media considering the effect of wellbore structure has been developed. The analytical approach is based on a similarity solution…

应用物理 · 物理学 2021-01-12 M. Roostaie , Y. Leonenko

Active galactic nuclei (AGNs) have been one of the most widely discussed sources of ultrahigh-energy cosmic rays (UHECRs). The recent results of Pierre Auger observatory (PAO) have indicated a possible composition change of UHECRs above…

高能天体物理现象 · 物理学 2010-01-07 Asaf Pe'er , Kohta Murase , Peter Mészáros

Shallow ground-source heat pumps (GSHPs) are a promising technology for contributing to the decarbonisation of the energy sector. In heating-dominated climates, the combined use of GSHPs for both heating and cooling increases their…

系统与控制 · 电气工程与系统科学 2022-01-06 Alina Walch , Xiang Li , Jonathan Chambers , Nahid Mohajeri , Selin Yilmaz , Martin Patel , Jean-Louis Scartezzini

We investigate the thermodynamical properties of black holes in (3+1) and (2+1) dimensional Einstein gravity with a negative cosmological constant. In each case, the thermodynamic internal energy is computed for a finite spatial region that…

广义相对论与量子宇宙学 · 物理学 2009-10-22 J. D. Brown , J. Creighton , R. B. Mann

An approach for measuring energy of cosmic-ray particles with energies E > 10^12 eV using an ultrathin calorimeter is presented. The method is based on the analysis of the correlation dependence of the cascade size on the rate of…

An energy conservation law is described, expressing the increase in mass-energy of a general black hole in terms of the energy densities of the infalling matter and gravitational radiation. For a growing black hole, this first law of…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Sean A. Hayward

Accurate determination of the geothermal gradient is critical for assessing the geothermal energy potential of a given region. Of particular interest is the case of Colombia, a country with abundant geothermal resources. A history of active…

地球物理 · 物理学 2025-10-03 Juan Camilo Mejía-Fragoso , Manuel A. Florez , Rocío Bernal-Olaya

A significant fraction of the 44TW of heat dissipation from the Earth's interior is believed to originate from the decays of terrestrial uranium and thorium. The only estimates of this radiogenic heat, which is the driving force for mantle…

In order to better understand energy estimation of electromagnetic showers in segmented calorimeters, detailed Geant4 simulation studies of electromagnetic showers in the energy range 1--100 GeV in CsI have been performed. When sampled in…

仪器与探测器 · 物理学 2016-11-15 Sara Bergenius Gavler , Per Carlson , Jan Conrad

We have investigated the benefits and drawbacks of active EM surveying (Controlled-Source EM or CSEM) for monitoring geothermal reservoirs in the presence of strong industrial noise with an actual time-lapse survey over the Reykjanes…

地球物理 · 物理学 2019-05-21 Mathieu Darnet , N. Coppo , P. Wawrzyniak , S. Nielsson , G. Fridleifsson , E. Schill

The ground source heat pump heating system is considered as one of the best solutions for the transition towards green heating under the continental climate conditions like Kazakhstan. In this paper, experimental and theoretical…

The energy losses and spectra of Ultra High Energy Cosmic Rays (UHECR) are calculated for protons as primary particles. The attention is given to the energy losses due to electron-positron production in collisions with the microwave 2.73 K…

高能物理 - 唯象学 · 物理学 2007-05-23 V. Berezinsky , A. Z. Gazizov , S. I. Grigorieva

It is crucial to identify the ultrahigh-energy cosmic-ray (UHECR) sources and probe their unknown properties. Recent results from the Pierre Auger Observatory favor a heavy nuclear composition for the UHECRs. Under the requirement that…

高能天体物理现象 · 物理学 2016-03-14 Kohta Murase , John F. Beacom

We motivate how the most recent progress in the understanding the nature of the GeV radiation in most energetic gamma-ray bursts (GRBs), the binary-driven hypernovae (BdHNe), has led to the solution of a forty years unsolved problem in…

The Ashtekar-Krishnan energy-balance law for dynamical horizons, expressing the increase in mass-energy of a general black hole in terms of the infalling matter and gravitational radiation, is expressed in terms of trapping horizons,…

广义相对论与量子宇宙学 · 物理学 2008-11-26 Sean A. Hayward

A simulation study of the energy released in air due to the development of an extensive air shower has been carried out using the CORSIKA code. The contributions to the energy release from different particle species and energies as well as…

天体物理学 · 物理学 2007-05-23 Markus Risse , Dieter Heck