Results 91 to 100 of about 26,973 (231)

Milky Way Mass and Potential Recovery Using Tidal Streams in a Realistic Halo [PDF]

, 2014
We present a new method for determining the Galactic gravitational potential based on forward modeling of tidal stellar streams. We use this method to test the performance of smooth and static analytic potentials in representing realistic dark matter ...
Bonaca, Ana, Diemand, Juerg, Geha, Marla, Hogg, David W., Johnston, Kathryn V., Kuepper, Andreas H. W.   +5 more
core   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

On the relevance of chaos for halo stars in the Solar Neighbourhood [PDF]

, 2015
We show that diffusion due to chaotic mixing in the Neighbourhood of the Sun may not be as relevant as previously suggested in erasing phase space signatures of past Galactic accretion events. For this purpose, we analyse Solar Neighbourhood-like volumes
Cincotta, Pablo M., Cooper, Andrew P., Giordano, Claudia M., Gómez, Facundo A., Maffione, Nicolás P., O'Shea, Brian W.   +5 more
core   +4 more sources

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Experimental artefacts in undrained triaxial testing [PDF]

, 2010
For evaluation of the undrained thermo-poro-elastic properties of saturated porous materials in conventional triaxial cells, it is important to take into account the effect of the dead volume of the drainage system.
Ghabezloo, Siavash, Sulem, Jean
core   +3 more sources

Testing the inversion of asteroids' Gaia photometry combined with ground-based observations [PDF]

, 2014
We investigated the reliability of the genetic algorithm which will be used to invert the photometric measurements of asteroids collected by the European Space Agency Gaia mission. To do that, we performed several sets of simulations for 10 000 asteroids
Bartczak, P., Cellino, A., Michałowski, T., Santana-Ros, T., Tanga, P.   +4 more
core   +3 more sources

Behavior of Long‐Slotted Perforated Steel Plate Fuses in Timber Brace End Connections

Earthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Steel perforated plate fuses have emerged as a promising solution for mass timber seismic force‐resisting systems, offering tunable energy dissipation mechanisms, such as flexural and shear yielding, through geometric adjustments. This study examines the cyclic performance of perforated steel plate fuses employed in timber braced frames, with ...
Yahia Ahmed, Hossein Daneshvar, Ying Hei Chui   +2 more
wiley   +1 more source

True triaxial modeling test of high-sidewall underground caverns subjected to dynamic disturbances

Journal of Rock Mechanics and Geotechnical Engineering
Seismicity resulting from the near- or in-field fault activation significantly affects the stability of large-scale underground caverns that are operating under high-stress conditions.
Chuanqing Zhang, Jinping Ye, Ning Liu, Qiming Xie, Mingming Hu, Lingyu Li   +5 more
doaj   +1 more source

Development of experimental concepts for investigating the strength behavior of fine-grained cohesive soil in the Spacelab/space shuttle zero-g environment [PDF]

Three different sets of tests are proposed for the NASA Spacelab experimental program. The first of tests, designed to measure the true cohesion of several different soils, would be carried out in space through use of a specially prepared direct shear ...
Bonaparte, R., Mitchell, J. K.
core   +1 more source

Dynamical Evolution of Elliptical Galaxies with Central Singularities

, 1997
We study the effect of a massive central singularity on the structure of a triaxial galaxy using N-body simulations. Starting from a single initial model, we grow black holes with various final masses Mh and at various rates, ranging from impulsive to ...
Allen A. J., Bender R., Binney J. J., David Merritt, Dehnen W., Eckart A., Friedli D., Gerald D. Quinlan, Gerhard O. E., Goodman J., Kaufmann D. E., Kormendy J., Lynden-Bell D., May A., Noguchi M., Pfenniger D., Pfenniger D., Soltan A., Udry S., Udry S.   +19 more
core   +2 more sources