Results 21 to 30 of about 1,130,240 (351)

Rockburst management in Canadian hard rock mines

open access: yesJournal of Rock Mechanics and Geotechnical Engineering, 2019
Rockburst is a complex mining-induced phenomenon that remains difficult to be quantified. In particular, geological conditions contributing to rockbursts are more variable than those in many conventional engineering approaches.
B.P. Simser
doaj   +1 more source

Analysis of Support Design in Weak Rock Drift Using a Systematic Approach

open access: yesAdvances in Civil Engineering, 2020
The aim of this study is to develop a systematic approach for support design of weak rock drift based on empirical, analytical, and numerical method, which is employed to estimate weak rock support demand and design support system.
Xingdong Zhao   +4 more
doaj   +1 more source

Recovery of Rare Metals from Superalloy Scraps by an Ultrasonic Leaching Method with a Two-Stage Separation Process

open access: yesSeparations, 2022
Superalloy scraps are deemed as potential unconventional sources of rare metals. In this study, an ultrasonic leaching method with a two-stage separation process was proposed.
Long Wang   +9 more
doaj   +1 more source

Precise determination of the Higgs mass in supersymmetric models with vectorlike tops and the impact on naturalness in minimal GMSB [PDF]

open access: yes, 2015
We present a precise analysis of the Higgs mass corrections stemming from vectorlike top partners in supersymmetric models. We reduce the theoretical uncertainty compared to previous studies in the following aspects: (i) including the one-loop threshold ...
Nickel, Kilian, Staub, Florian
core   +2 more sources

Soldadura del acero ASTM 615 con diferentes tipos de electrodos

open access: yesCiencia & Futuro, 2022
Se estableció el comportamiento microestructural en barra de acero estructural del tipo ASTM A615 grado 60 G. La unión de las barras se realizó a tope con bisel a 60o con electrodos E 6010 y E 7018, se determinó el comportamiento microestructural, el ...
Gioelkis Espinosa-Batista   +3 more
doaj  

On the equivariant Tamagawa number conjecture for Tate motives and unconditional annihilation results [PDF]

open access: yes, 2015
Let L/K be a finite Galois extension of number fields with Galois group G. Let p be a rational prime and let r be a non-positive integer. By examining the structure of the p-adic group ring Z_p[G], we prove many new cases of the p-part of the equivariant
Johnston, Henri, Nickel, Andreas
core   +2 more sources

Indicadores económicos para evaluar la sostenibilidad de la empresa extractiva Materiales de Construcción a través del Método Multicriterio

open access: yesCiencia & Futuro, 2022
Se evaluó el desempeño de las variables e indicadores económicos en la empresa extractiva Materiales de la Construcción. La investigación se desarrolló a través de 7 etapas metodológicas que posibilitaron evaluar los principales indicadores de la ...
Dailén González-Martín   +2 more
doaj  

Coral recruitment enhancement in fish shelter media composed of fly ash and nickel slag on Obi Island, South Halmahera

open access: yesDepik Jurnal
The reefcube, a modular structure, serves as a primary habitat for fish and aids in the recruitment of new coral. The reefcube is predominantly made from fly ash and nickel slag, by-products of pyrometallurgy process that contain high content of CaO, MgO,
Prasari Riski Hutami   +3 more
doaj   +1 more source

Thermal Conductivity Model Analysis of Unsaturated Ice-Containing Soil

open access: yesGeofluids, 2022
In cold locales, the thermal conductivity of soil porous media varies according to their composition and the phase state of the substance contained within the pore space.
Qiang Han, Zhiguo Wang, Rui Qin
doaj   +1 more source

Inhomogeneous phases in the Nambu-Jona-Lasino and quark-meson model

open access: yes, 2009
We discuss inhomogeneous ground states of the Nambu-Jona-Lasino (NJL) and quark-meson (QM) model within mean-field approximation and their possible existence in the respective phase diagrams. For this purpose we focus on lower dimensional modulations and
Nickel, Dominik
core   +1 more source

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