Results 61 to 70 of about 89,189 (222)

Numerical and experimental study on P‐wave propagation across a rock joint with different orientations

open access: yesDeep Underground Science and Engineering, EarlyView.
Joint orientation significantly affects P‐wave velocity, with the highest velocity at zero‐degree angles, decreasing to 30° as the angle increases. The velocity increases slightly from 30 to 45 degrees but sharply decreases from 45 to 90 degrees. Abstract Determination of the required parameters in different science contexts using the ultrasonic wave ...
Yaghoob Zarei   +4 more
wiley   +1 more source

Two UC-Sets Whose Union is Not a UC-Set [PDF]

open access: yesProceedings of the American Mathematical Society, 1982
It is shown that the union of two sets of uniform convergence need not be a set of uniform convergence.
openaire   +1 more source

Advancing mine pillar design: Evaluating traditional methods and integrating AI for enhanced stability of pillars in the Great Dyke, Zimbabwe

open access: yesDeep Underground Science and Engineering, EarlyView.
B1 is bord width 1, B2 is bord width 2, L is the pillar length, W is the pillar width, red color and letter A represent the pillars, and white color and number 1 represent excavated areas. Pstress is the average pillar stress; σv is the vertical component of the virgin stress, MPa; and e is the areal extraction ratio. e = B o B o + B P ${\rm{e}}=\frac{{
Tawanda Zvarivadza   +4 more
wiley   +1 more source

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

open access: yesDeep 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   +4 more
wiley   +1 more source

TURISMO: FERRAMENTA DE DESENVOLVIMENTO DE REGIÕES

open access: yesRevista Gestão e Desenvolvimento, 2015
Esse artigo tem como foco a Mesorregião Metade Sul do estado do Rio Grande do Sul com suas regiões e microrregiões, descrevendo as cidades que as compõe com alguns de seus dados demográficos, econômicos e culturais; a estrutura de serviços para o turismo,
Michele Vasconcellos Chiattone   +3 more
doaj   +1 more source

Atomic and molecular complex resonances from real eigenvalues using standard (hermitian) electronic structure calculations

open access: yes, 2015
Complex eigenvalues, resonances, play an important role in large variety of fields in physics and chemistry. For example, in cold molecular collision experiments and electron scattering experiments, autoionizing and pre-dissociative metastable resonances
Haritan, Idan   +3 more
core   +2 more sources

Mechanistic insights across curing regimes for enzymatic and biopolymer‐optimized reinforcement in rock masses

open access: yesDeep Underground Science and Engineering, EarlyView.
This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley   +1 more source

Aspectos estratégicos e relacionais das alianças do tipo joint-venture: o caso de dois fabricantes da indústria automobilística [doi: 10.5329/RECADM.2014012]

open access: yesRevista Eletrônica de Ciência Administrativa, 2014
Este artigo tem como objetivo analisar a formação de joint-ventures de dois fabricantes da indústria automobilística, compreendendo aspectos estratégicos e relacionais destas alianças.
Marina D’Agostini   +3 more
doaj   +1 more source

Proposal for encoding the Javanese script in the UCS [PDF]

open access: yes, 2007
This is a proposal to encode the Javanese script in the international character encoding standard Unicode. The script was published in Unicode Standard version 5.2 in October 2009.
Everson, Michael
core  

Machine Learning and Artificial Intelligence Techniques for Intelligent Control and Forecasting in Energy Storage‐Based Power Systems

open access: yesEnergy Science &Engineering, EarlyView.
A new energy paradigm assisted by AI. ABSTRACT The tremendous penetration of renewable energy sources and the integration of power electronics components increase the complexity of the operation and power system control. The advancements in Artificial Intelligence and machine learning have demonstrated proficiency in processing tasks requiring ...
Balasundaram Bharaneedharan   +4 more
wiley   +1 more source

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