Results 41 to 50 of about 6,087,560 (207)
Cosmic censorship and spherical gravitational collapse with tangential pressure [PDF]
, 1997 We study the spherical gravitational collapse of a compact object under the approximation that the radial pressure is identically zero, and the tangential pressure is related to the density by a linear equation of state.
Bondi H +10 more
core +2 more sources
Physical Therapy Korea, 2021 Background: Theoretically, balance is affected by the height of center of mass (COM) during quiet standing. However, no one examined this in humans with variables derived from the center of pressure (COP). Objects: We have conducted balance experiment
Seung-su Kim +2 more
doaj +1 more source
Oscillatory mechanoluminescence of Mn2+-doped SrZnOS in dynamic response to rapid compression
Nature CommunicationsPhoton emission may be continuously produced from mechanical work through self-recoverable mechanoluminescence (ML). Significant progress has been made in high-performance ML materials in the past decades, but the rate-dependent ML kinetics remains ...
Hao Wang +13 more
doaj +1 more source
Nature Communications, 2019 Subduction of oceanic crust introduces huge amounts of carbonates into Earth’s mantle, contributing to the global carbon cycle. Here, based on high-pressure-temperature experiments, the authors present a reversible temperature-induced transition from ...
Mingqiang Hou +8 more
doaj +1 more source
Greatly enhanced mechanical properties of thermoelectric SnSe through microstructure engineering
Journal of Advanced Ceramics, 2023 The outstanding thermoelectric material, SnSe, is also known for its inferior mechanical properties, which bring great inconvenience for its application in thermoelectric devices.
Chen Chen +11 more
doaj +1 more source
FootTile: a Rugged Foot Sensor for Force and Center of Pressure Sensing in Soft Terrain [PDF]
, 2020 In this paper we present FootTile, a foot sensor for reaction force and center of pressure sensing in challenging terrain. We compare our sensor design to standard biomechanical devices, force plates and pressure plates. We show that FootTile can accurately estimate force and pressure distribution during legged locomotion.
arxiv +1 more source
Two-way tuning of structural order in metallic glasses
Nature Communications, 2020 While metallic glasses are expected to have tunable structures, these have rarely been demonstrated. Here, the authors combine temperature and pressure to show a two-way structural tuning in rare earth-based metallic glasses beyond the nearest-neighbor ...
Hongbo Lou +14 more
doaj +1 more source
Correlation Inequalities for Quantum Spin Systems with Quenched Centered Disorder [PDF]
, 2009 It is shown that random quantum spin systems with centered disorder satisfy correlation inequalities previously proved (arXiv:cond-mat/0612371) in the classical case. Consequences include monotone approach of pressure and ground state energy to the thermodynamic limit. Signs and bounds on the surface pressures for different boundary conditions are also
arxiv +1 more source
Methane Hydrate under High Pressure: Searching for Centering of Hydrogen Bonds [PDF]
Phys. Rev. B 68, 172105 (2003), 2003 The structural, electronic, and spectroscopic properties of a high-pressure phase of methane hydrate (MH-III) are studied by first principles electronic structure calculations. A detailed analysis of the atomic positions suggests that {\it ionization} of hydrogen-bonded water molecules occurs around 40GPa and {\it centering} or symmetrization of ...
arxiv +1 more source
Effects of pressure on diffusion and vacancy formation in MgO from non-empirical free-energy integrations [PDF]
, 1997 The free energies of vacancy pair formation and migration in MgO were computed via molecular dynamics using free-energy integrations and a non-empirical ionic model with no adjustable parameters. The intrinsic diffusion constant for MgO was obtained at pressures from 0 to 140 GPa and temperatures from 1000 to 5000 K.
arxiv +1 more source