Results 81 to 90 of about 7,664,425 (315)

Ecological patterns for vegetation cover formation in the mining waste dumps of the Lviv-Volyn coal basin [PDF]

, 2020
Purpose. Determination of ecological patterns for vegetation cover formation in the mining waste dumps of the Lviv-Volyn coal basin based on the ecotopes floristic composition analysis of waste heaps reclaimed and non-reclaimed. Methods.
Skrobala, Viktor, Pinder, Volodymyr, Popovych, Vasyl   +2 more
core   +1 more source

Slip Localization Intensification Mediated by Grain Boundary Sliding in a Polycrystalline Nickel‐Based Superalloy

Advanced Engineering Materials, EarlyView.
The temperature dependence of fatigue behavior in nickel‐based superalloys is investigated through high‐resolution measurements of plastic localization. While increasing temperature reduces localization and enhances fatigue performance in René 88DT, Inconel 718 exhibits a sharp degradation at intermediate temperature due to intensified slip ...
M. Calvat, D. Anjaria, I. Woo, C. Bean, D. Texier, J. C. Stinville   +5 more
wiley   +1 more source

Research and practice on key technologies for coordinated green mining of shallowly buried multi-coal seam groups

Meitan kexue jishu
The multi-seam occurrence conditions in the western mining area have brought forth prominent and common issues such as "contradictions in mining face layout, variable overburden structure, and superimposed surface migration".
Qunying WU, Jian HU, Kai LIU, Yang LI, Xiaoshen XIE, Desheng ZHANG   +5 more
doaj   +1 more source

Analysis Of Highwall Mining Stability - The Effect Of Multiple Seams And Prior Auger Mining On Design [PDF]

The objective of this is paper is to review the current state of knowledge and practice in highwall mining (HWM). HWM has become a widely-applied method in surface mining, commonly used alone or in conjunction with contour or slot mining. It provides 800-

core  

Recycling of NiTi Shape Memory Alloys: Fundamental and Technological Aspects of a Vacuum Induction Melting Processing Route

Advanced Engineering Materials, EarlyView.
The present study investigates recycling of NiTi shape memory alloys via vacuum induction melting. An ingot was synthesized from elemental Ni and Ti and subjected to three subsequent remelting cycles. Remelting increases process durations and impurity levels and adversely affects microstructures and functional properties.
Sakia Sophia Noorzayee, Son Tung Mai, Sarath Menon, Braulio Gadiel Sánchez Ortega, Ralf Drautz, Alexander Kauffmann, Gunther Eggeler, Jan Frenzel   +7 more
wiley   +1 more source

An average linear time algorithm for web data mining [PDF]

, 2004
In this paper, we study the complexity of a data mining algorithm for extracting patterns from user web navigation data that was proposed in previous work.3 The user web navigation sessions are inferred from log data and modeled as a Markov chain.
Mark Levene, Jose ́ Borges, Levene, Mark, José Borges, Borges, J.   +4 more
core   +1 more source

Experimental Characterization and Constitutive Modeling of the Effect of Prior Inelastic Strain on the Viscoplastic Behavior of AD730 at 700 °C

Advanced Engineering Materials, EarlyView.
This study shows that superalloys used in aircraft engine disks become much more prone to deformation at high temperatures if they have been strained during manufacturing. This effect increases with the level of prior strain but eventually reaches a limit.
Fabio Machado Alves da Fonseca, Patrick Villechaise, Malik Durand, Arnaud Longuet, Florent Coudon, Loïc Signor, Julien De Jaeger, Dominique Eyidi, Nathalie Bozzolo, Jonathan Cormier   +9 more
wiley   +1 more source

The effect of mining foreign direct investment inflow on the economic growth of Zimbabwe

Journal of Economic Structures, 2020
The study employs the autoregressive distributed lag (ARDL) approach to examine the relationship between foreign direct investment (FDI) in the mining sector on the Zimbabwe economy, while controlling for both non-mining FDI and domestic investment ...
Plaxedes Gochero, Seetanah Boopen
doaj   +1 more source

Soil-to-plant transfer factors of uranium and thorium in mining and non-mining districts of Ghana

Journal of Environmental Radioactivity
The activity concentrations of natural radionuclides in water, soil, cassava, cocoyam and yam grown in two mining districts and a non-mining district in Ghana were determined using a high-resolution gamma spectroscopy system with high-purity germanium detector.
Edward Ankapong, Opoku Gyamfi, Victor Agyei, Matt Dodd, Osei Akoto, Godfred Darko   +5 more
openaire   +2 more sources

Abundance and species richness of birds in mined and non-mined sites of the Jos Plateau, Nigeria.

Science World Journal, 2010
No ...
Dami, F.D, Okafor, C.I
openaire   +3 more sources