Results 21 to 30 of about 2,592,144 (295)

Uniaxial compression failure and energy dissipation of marble specimens with flaws at the end surface

open access: yes工程科学学报, 2020
It is a fact that a large number of defects such as cracks, voids, inclusions, weak planes, and joint sets are generated within the rock mass during the process of rock formation because of geological-tectonic evolution.
Zhen-yu HAN   +4 more
doaj   +1 more source

Energy Evolution and Acoustic Emission Characteristics of Uniaxial Compression Failure of Anchored Layered Sandstone

open access: yesFrontiers in Earth Science, 2022
To study the energy evolution and acoustic emission characteristics of layered sandstone under anchorage in the process of deformation and failure, the sandstone samples from Chuxiong Yi Autonomous Prefecture, Yunnan Province were selected for uniaxial ...
Yang Yu   +5 more
doaj   +1 more source

NLO evolution of 3-quark Wilson loop operator [PDF]

open access: yes, 2014
It is well known that high-energy scattering of a meson from some hadronic target can be described by the interaction of that target with a color dipole formed by two Wilson lines corresponding to fast quark-antiquark pair.
Balitsky, I., Grabovsky, A. V.
core   +3 more sources

Probing the outer edge of an accretion disk : a Her X-1 turn-on observed with RXTE [PDF]

open access: yes, 2005
We present the analysis of Rossi X-ray Timing Explorer (RXTE) observations of the turn-on phase of a 35 day cycle of the X-ray binary Her X-1. During the early phases of the turn-on, the energy spectrum is composed of X-rays scattered into the line of ...
Bai   +44 more
core   +2 more sources

An Evolution Based on Various Energy Strategies [PDF]

open access: yesEntropy, 2021
The simplest model of the evolution of agents with different energy strategies is considered. The model is based on the most general thermodynamic ideas and includes the procedures for selection, inheritance, and variability. The problem of finding a universal strategy (principle) as a selection of possible competing strategies is solved.
Alexander O. Gusev, Leonid M. Martyushev
openaire   +3 more sources

On the self-similarity of nonhelical magnetohydrodynamic turbulence [PDF]

open access: yes, 2016
We re-analyze the Olesen arguments on the self-similarity properties of freely evolving, nonhelical magnetohydrodynamic turbulence. We find that a necessary and sufficient condition for the kinetic and magnetic energy spectra to evolve self-similarly is ...
Campanelli, Leonardo
core   +2 more sources

Information entropy and dark energy evolution

open access: yes, 2017
The information entropy is here investigated in the context of early and late cosmology under the hypothesis that distinct phases of universe evolution are entangled between them. The approach is based on the \emph{entangled state ansatz}, representing a
Capozziello, Salvatore, Luongo, Orlando
core   +1 more source

Cosmic rays in early star-forming galaxies and their effects on the interstellar medium [PDF]

open access: yes, 2017
Galaxies at high redshifts with strong star formation are sources of high-energy cosmic rays. These cosmic rays interact with the baryon and radiation fields of the galactic environment via photo-pair, photo-pion and proton-proton processes to produce ...
Jacobsen, Idunn B.   +3 more
core   +2 more sources

Experimental Study on Mechanical Deformation and Energy Evolution of Deep Coal Under Complex Stress Paths

open access: yesApplied Sciences
This study proposes a novel cyclic stress path with simultaneous axial and confining stress and conducts triaxial testing on raw coal over various cycle periods.
Yue Jiang   +3 more
doaj   +1 more source

Is there evidence for dark energy evolution?

open access: yes, 2015
Recently, Sahni, Shafielo o & Starobinsky (2014) combined two independent measurements of $H(z)$ from BAO data with the value of the Hubble constant $H_0 = H(z=0)$, in order to test the cosmological constant hypothesis by means of an improved version of ...
Biesiada, Marek   +4 more
core   +1 more source

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