Results 31 to 40 of about 1,159,294 (198)

Filling of a Poisson trap by a population of random intermittent searchers [PDF]

open access: yes, 2011
We extend the continuum theory of random intermittent search processes to the case of $N$ independent searchers looking to deliver cargo to a single hidden target located somewhere on a semi--infinite track.
Bressloff, P. C., Newby, J. M.
core   +2 more sources

Solid waste filling and roadway retaining for longwall mining by numerical investigation

open access: yesHeliyon, 2023
Solid waste filling and roadway retaining can effectively control surface subsidence and alleviate solid waste accumulation pollution. In order to effectively evaluate the advantages of solid waste filling in deformation control of overlying strata and ...
Kai Sun   +7 more
doaj   +1 more source

Laboratory experiments and models of diffusive emplacement of ground ice on Mars [PDF]

open access: yes, 2009
Experiments demonstrate for the first time the deposition of subsurface ice directly from atmospheric water vapor under Mars surface conditions. Deposition occurs at pressures below the triple point of water and therefore in the absence of a bulk liquid ...
Aharonson, Oded   +2 more
core   +1 more source

Analysis of Surface Subsidence and Deformation of Thick Mechanized Coal Gangue Filling Mining Under Village

open access: yesMeikuang Anquan, 2020
In order to liberate the resources of shallow and thick coal seams under villages, prolong the service life of mines, and ensure the safe use of surface buildings, it is necessary to carry out the study on controlling surface subsidence deformation by ...
WANG Qichun, GUO Guangli
doaj   +1 more source

Magneto-optical evidence of the percolation nature of the metal-insulator transition in the 2D electron system [PDF]

open access: yes, 1996
We compare the results of the transport and time-resolved magneto-luminescence measurements in disordered 2D electron systems in GaAs-AlGaAs heterostructures in the extreme quantum limit, in particular, in the vicinity of the metal-insulator transition ...
A. Karlhede   +22 more
core   +2 more sources

Experimental study on deformation and failure of cemented filling body in open-pit end slope under different loading rates

open access: yesMeikuang Anquan, 2022
In order to reveal the influence of loading rate on the deformation and failure of cemented waste rock filling body, uniaxial compression tests of cemented waste rock filling body under five groups of loading rates were carried out, and the changes of ...
LI Qiang   +6 more
doaj   +1 more source

Searching for radiative pumping lines of OH masers: II. The 53.3um absorption line towards 1612MHz OH maser sources

open access: yes, 2004
This paper analyzes the 53.3um line in the ISO LWS spectra towards a similar sample of OH/IR sources. We find 137 LWS spectra covering 53.3um and associated with 47 galactic OH/IR sources. Ten of these galactic OH/IR sources are found to show and another
Chen, P. S., He, J. H.
core   +1 more source

Type Ia Supernovae: An Examination of Potential Progenitors and the Redshift Distribution [PDF]

open access: yes, 1997
We examine the possibility that supernovae type Ia (SN Ia) are produced by white dwarfs accreting from Roche-lobe filling evolved companions, under the assumption that a strong optically thick stellar wind from accretor is able to stabilize the mass ...
Canal R.   +18 more
core   +3 more sources

Activity Related Variations of High-Degree p-Mode Amplitude, Width and Energy in Solar Active Regions [PDF]

open access: yes, 2013
We study the properties of high degree p-mode oscillations in flaring and dormant ARs and compare them with those in corresponding quiet regions (QRs) to find the association of mode parameters with magnetic and flare related activities.
Ambastha, A., Chae, J., Maurya, R. A.
core   +1 more source

Design of Constant Speed Controller for Hydraulic Retarder Based on Robust Control

open access: yesApplied Sciences
Achieving long downhill constant-speed driving of heavy vehicles is of great significance for improving vehicle transport safety. As a kind of auxiliary brake, the hydraulic retarder has the characteristics of large braking torque and compact structure ...
Pengxiang Song, Ao Meng, Yang Ding
doaj   +1 more source

Home - About - Disclaimer - Privacy