Results 31 to 40 of about 2,591,056 (296)

Analysis of Mechanical Properties and Energy Evolution of Through-Double-Joint Sandy Slate Under Three-Axis Loading and Unloading Conditions

Applied Sciences
In the mining of deep mineral resources and tunnel engineering, the degradation of mechanical properties and the evolution of energy of through-double-joint sandy slate under triaxial loading and unloading conditions are key scientific issues affecting ...
Yang Wang, Chuanxin Rong, Hao Shi, Zhensen Wang, Yanzhe Li, Runze Zhang   +5 more
doaj   +1 more source

Uncorrelated estimates of dark energy evolution [PDF]

Physical Review D, 2005
5 pages, 2 ...
Huterer, Dragan, Cooray, Asantha
openaire   +2 more sources

Neuronal energy use and brain evolution

Current Biology, 2022
Consider how advantageous it might be to have eyes on our hands, rather than on our faces: depth perception would be improved by the greater distance between the eyes, and it would be easy to look into relatively inaccessible spaces by appropriate movement of the hands. The absence of mammals that use this visual strategy draws attention to constraints
Quintela-López, Tania, Shiina, Hiroko, Attwell, David   +2 more
openaire   +3 more sources

Is there evidence for dark energy evolution?

, 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, Cao, Shuo, Ding, Xuheng, Li, Zhengxiang, Zhu, Zong-Hong   +4 more
core   +1 more source

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

, 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., Owen, Ellis R., Surajbali, Pooja, Wu, Kinwah   +3 more
core   +2 more sources

Experimental study on moisture-dependent energy stage evolution and damage mechanisms of siltstone under cyclic loading-unloading in brazilian splitting tests

Frontiers in Earth Science
To investigate the tensile damage mechanism of rock mass under the coupled effects of cyclic loading and water-bearing conditions in deep engineering, this study conducts Brazilian splitting cyclic loading-unloading tests on dry and water-saturated ...
Zhu Chen, Qiang Yuan, Xiukang Zhang, Xiaoliang Liu, Xinkuan Bai, Yongqiang Chen   +5 more
doaj   +1 more source

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

, 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, Becker, Boyd, Brainerd, Burwitz, Cheng, Coburn, Dal Fiume, Davison, Deeter, Giacconi, Gruber, J. Wilms, K. A. Postnov, Kaastra, Katz, Kuster, Kylafis, Leahy, Lightman, M. Kuster, Maloney, Miller, N. I. Shakura, Nowak, Oosterbroek, Parmar, Parmar, Parmar, R. E. Rothschild, R. Staubert, Schandl, Schandl, Scott, Scott, Shakura, Shakura, Tananbaum, Trümper, Verner, Vrtilek, Vrtilek, W. A. Heindl, Wilms, Wilms   +44 more
core   +2 more sources

Revealing the structure of land plant photosystem II: the journey from negative‐stain EM to cryo‐EM

FEBS Letters, EarlyView.
Advances in cryo‐EM have revealed the detailed structure of Photosystem II, a key protein complex driving photosynthesis. This review traces the journey from early low‐resolution images to high‐resolution models, highlighting how these discoveries deepen our understanding of light harvesting and energy conversion in plants.
Roman Kouřil
wiley   +1 more source

Energy evolution and constitutive model for damage of degraded limestone under coupling effects of hydrodynamic-stress-chemical corrosion

Yantu gongcheng xuebao
The reservoir water level undergoes annual cyclical fluctuations, which leads to the state of hydrodynamic erosion of wetting-drying cycles of the bedrock in the hydro-fluctuation belt. In addition, the self-weight of the overlying rock mass also reduces
YANG Zhongping 1, 2, 3 , HOU Shanmeng 1, ZHANG Yiming 1, GAO Yuhao 1, LIU Xinrong 1, 2, 3
doaj   +1 more source

Analysis of Failure Mechanics and Energy Evolution of Sandstone Under Uniaxial Loading Based on DIC Technology

Frontiers in Earth Science, 2022
Energy evolution process of rock deformation is conducive to essentially reveal the rock failure mechanism and is of great significance to uncover the breeding of dynamic disasters in rock engineering.
Like Wei, Like Wei, Qiang Yuan, Yiwei Ren, Deyi Jiang, Dingding Zhang, Yongliang Liu, Yunlong Zou, Shicong Ren   +8 more
doaj   +1 more source