Results 41 to 50 of about 441,091 (198)

Experimental Study on Reasonable Spacing after Carbon Dioxide Presplitting in Low-Permeability Coal Seam

open access: yesAdvances in Civil Engineering, 2021
Gas disasters have been always a major hidden danger that affects mining safety in coal mines. Gas drainage by drilling is the fundamental method of gas control in coal mines.
Zongyong Wei   +5 more
doaj   +1 more source

Experimental and numerical investigation on mixing and axial dispersion in Taylor-Couette flow patterns [PDF]

open access: yes, 2012
Taylor-Couette flows between two concentric cylinders have great potential applications in chemical engineering. They are particularly convenient for two-phase small scale devices enabling solvent extraction operations.
Campero   +18 more
core   +3 more sources

Nucleon electromagnetic form factors in two-flavour QCD [PDF]

open access: yes, 2015
We present results for the nucleon electromagnetic form factors, including the momentum transfer dependence and derived quantities (charge radii and magnetic moment).
Capitani, S.   +9 more
core   +3 more sources

Physical optimal design and analysis of 99Mo production in new type molten salt fast reactor

open access: yesHe jishu, 2022
Background99Mo has important applications in nuclear medicine field. It can be produced in a 235U fission reactor with high yield and specific activity.PurposeThis study aims to optimize the core parameters of new type molten salt fast reactor, and then ...
LIU Xiaolin   +5 more
doaj   +1 more source

The Synergistic Effect in Solvent Extraction—The Correlation of the Ionic Radius of Rare Earth Elements with the Stability Constants of Rare Earth Benzoyltrifluoroacetonate Adducts with n-Hexyl Alcohol, TBP and TOPO [PDF]

open access: yesBulletin of the Chemical Society of Japan, 1967
Abstract The synergistic effects of n-hexyl alcohol, TBP and TOPO on the extraction of rare earth ions with benzoyltrifluoroacetone in benzene have been studied. The stability constants of the adducts were determined by means of the curve-fitting method.
Tsunenobu Shigematsu   +3 more
openaire   +1 more source

Baryon number segregation at the end of the cosmological quark-hadron transition [PDF]

open access: yes, 1996
One of the most interesting questions regarding a possible first order cosmological quark--hadron phase transition concerns the final fate of the baryon number contained within the disconnected quark regions at the end of the transition.
A. Goyal   +25 more
core   +2 more sources

Study and application of reasonable parameters for hydraulic punching of layer penetration boreholes in Changping Coal Mine

open access: yesEnergy Science & Engineering, 2023
Aiming at the application of hydraulic punching technology in soft, low permeability, and high gas coal seams in Changping Coal Mine, there are problems such as large workload, poor permeability enhancement effect, and the formation of “blank zones” in ...
Rui Min   +4 more
doaj   +1 more source

Particle motion and collisions around rotating regular black hole

open access: yes, 2014
The neutral particle motion around rotating regular black hole that was derived from the Ay\'{o}n-Beato-Garc\'{i}a black hole solution by the Newman-Janis algorithm in the preceding paper [Phys. Rev. D 89, 104017, (2014)] has been studied.
Abdujabbarov, Ahmadjon   +3 more
core   +1 more source

A Local Baseline of the Black Hole Mass Scaling Relations for Active Galaxies. I. Methodology and Results of Pilot Study [PDF]

open access: yes, 2010
We present high-quality Keck/LRIS longslit spectroscopy of a pilot sample of 25 local active galaxies selected from the SDSS (0.0210^7 M_sun) to study the relations between black hole mass (MBH) and host-galaxy properties. We determine stellar kinematics
Auger, Matthew W.   +4 more
core   +4 more sources

Ages and fundamental properties of Kepler exoplanet host stars from asteroseismology

open access: yes, 2015
We present a study of 33 {\it Kepler} planet-candidate host stars for which asteroseismic observations have sufficiently high signal-to-noise ratio to allow extraction of individual pulsation frequencies.
Aguirre, V. Silva   +24 more
core   +1 more source

Home - About - Disclaimer - Privacy