Results 51 to 60 of about 3,836,809 (259)
Stress Tensor from the Trace Anomaly in Reissner-Nordstrom Spacetimes
, 2007 The effective action associated with the trace anomaly provides a general algorithm for approximating the expectation value of the stress tensor of conformal matter fields in arbitrary curved spacetimes.
D. Capper +7 more
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The effect of heart rate variability biofeedback training on stress and anxiety: a meta-analysis [PDF]
, 2017 BACKGROUND: Some evidence suggests that heart rate variability (HRV) biofeedback might be an effective way to treat anxiety and stress symptoms. To examine the effect of HRV biofeedback on symptoms of anxiety and stress, we conducted a meta-analysis of ...
Curtiss, Joshua E. +2 more
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Meitan kexue jishuIn the sealing section of double-prevention boreholes along the coal seam, the coal mass is characterized by a significant presence of pores and fracture structures, forming seepage channels through which air from the roadway infiltrates the extraction ...
Ning WANG +5 more
doaj +1 more source
Prosocial Behavior as a Stress Moderator: The Physiological and Psychological Components [PDF]
, 2018 Stress is a major part of everyday life for the majority of people, especially college students. Stress has a physiological response and serves an important purpose in the body.
Vannelli, Jessica
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Predicting fatigue crack growth rate in a welded butt joint: The role of effective R ratio in accounting for residual stress effect [PDF]
, 2009 A simple and efficient method is presented in this paper for predicting fatigue crack growth rate in welded butt joints. Three well-known empirical crack growth laws are employed using the material constants that were obtained from the base material ...
Servetti, Guido, Zhang, X.
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Open Geosciences, 2019 Shale, a heterogeneous and extremely complex gas reservoir, contains low porosity and ultra-Low permeability properties at different pore scales. Its flow behaviors are more complicated due to different forms of flow regimes under laboratory conditions ...
Memon Asadullah +3 more
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Influence of coal adsorption deformation on permeability evolution of three kinds of gas
Meikuang Anquan, 2021 In order to deeply understand the control mechanism of gas adsorption on coal permeability, based on the seepage experiment, the variation of coal permeability of helium, nitrogen and carbon dioxide under different pressures and effective stress was ...
ZHOU Yinbo +5 more
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Frontiers in Earth ScienceAs a waterless fracturing fluids for gas shale stimulation with low viscosity and strong diffusibility, supercritical CO2 is promising than the water by avoiding the clay hydration expansion and reducing reservoir damage.
Guojun Liu +7 more
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Aerospace, 2023 Fatigue damage accumulation will not only cause the degradation of material performance but also lead to the growth of effective stress and critical stiffness.
Jian-Xiong Gao +3 more
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Stress-energy tensor for a quantised bulk scalar field in the Randall-Sundrum brane model
, 2003 We calculate the vacuum expectation value of the stress-energy tensor for a quantised bulk scalar field in the Randall-Sundrum model, and discuss the consequences of its local behaviour for the self-consistency of the model. We find that, in general, the
A. Flachi +25 more
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