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561
Effect of Indenter Angle on Bearing Performance of Coal and Accompanying Rocks Under Point Load and Characterization of Mechanical Parameters
Published 2025-01-01“…ABSTRACT Coal, mudstone, sandstone, and limestone, which are common in coal mines, were selected as research objects, and 60°, 90°, and 120° indenters were used to conduct point load tests to study the deformation and failure laws of rocks under point loads. …”
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562
From Middle Jurassic extension to Late Jurassic obduction: sedimentary records from the Greater Adriatic margin of the Neotethys Ocean in NE Hungary
Published 2025-02-01“…The sedimentation in its Bajocian–early Callovian extensional half-grabens was characterised by pelagic limestones followed by dark shales with sandstone intercalations. Mass-flow deposits derived from both the footwalls of graben-bounding normal faults and the Adriatic Carbonate Platform were frequent. …”
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563
Longyearbyen CO2 lab project—from a vision of a CO2-neutral Svalbard to a geoscience data eldorado
Published 2025-01-01“…The geological ingredients for successful CO2 storage are in place, comprising a ca. 300 m thick, sandstone-dominated reservoir rock capped by an impermeable mudstone-dominated succession. …”
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564
Roof Water Damage Prediction and Evaluation of Sand-Mud Sedimentary Tectonic Strata
Published 2023-01-01“…Aiming at the problem of roof water disaster prediction of sandy-argillaceous structural strata in Shanghaimiao mining area in China, firstly, the mechanical structure model of roof water inrush was built according to the parameters in the advance of the working face, and the thickness of the sandstone was used as the main controlling geological factor; the formula was derived for calculating the water-rich intensity Fzh of the overlying strata in the mining area. …”
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565
Erodibility and sedimentation potential of marly formations at the watershed scale
Published 2019-07-01“…The results indicated that Kashkan formation comprises siltstone, sandstone, shale, and conglomerate, and Grupi formation contains shale, clay, and limestone with a high erodibility potential. …”
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566
Study on Blasting Characteristics of Soft-Hard Rock Strata Based on Energy Fields and Particle Expansion Loading Algorithm
Published 2022-01-01“…Firstly, the rationality of blasting method is verified by single-hole sandstone blasting experiment. Then, the soft-hard composite strata are established, and the single-hole blasting experiments of composite strata, with different distribution thickness of soft rock stratum and hard rock stratum, are carried out. …”
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567
On the Experimental Determination of Poisson’s Ratio for Intact Rocks and Its Variation as Deformation Develops
Published 2021-01-01“…In this paper, in order to explore the behavior of Poisson’s ratio, uniaxial compression tests according to The International Society for Rock Mechanics and Rock Engineering are performed on standard specimens of granite, marble, red sandstone, carbonate rock, coral concrete, etc. According to the results, Poisson’s ratio, both the secant Poisson’s ratio and tangent Poisson’s ratio, increase with the externally applied stress. …”
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568
A psychometric study: The validation of a school quality assessment tool
Published 2022-04-01“…Thus, it is necessary to think first about the regulation of the indicators that will serve as a system of valuation/sanction of the quality measured.Aim. The present research aims to construct a grid for evaluating pedagogical and administrative quality of secondary school. …”
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569
Managing the Investment Attractiveness of the Federal Subjects of Russia in the Context of the UN Sustainable Development Goals
Published 2022-07-01“…Inter-regional gaps in the investment sphere and sanction pressure on the national economy have actualized the issue of improving the efficiency of managing investment attractiveness at the mesoscale using modern high-precision methods of economic and mathematical modeling. …”
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570
Experimental Research on Mechanical and Energy Characteristics of Reinforced Rock under Dynamic Loading
Published 2019-01-01“…In this paper, with sandstone as matrix and steel bar as bolt, the dynamic compression test of reinforced rock was carried out by using a 50 mm rod diameter split Hopkinson pressure bar (SHPB) test device. …”
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571
Internal controls, corporate governance and fi nancial performance of MFIs in Uganda
Published 2023“…From the results, we sanction that internal controls, corporate governance, predict over 70.2% of the change in financial performance of Micro Finance Institutions in Uganda. …”
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572
Internal controls, corporate governance and fi nancial performance of MFIs in Uganda
Published 2023“…From the results, we sanction that internal controls, corporate governance, predict over 70.2% of the change in financial performance of Micro Finance Institutions in Uganda. …”
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573
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574
Personalidad, inteligencia emocional y afectividad en estudiantes universitarios de áreas empresariales Implicaciones para la formación de líderes
Published 2010-01-01“…Se utilizó el Inventario de Personalidad NEO-FFI de Costa & McCrae (1994), el TMMS-24 (adaptado por Fernández-Berrocal, Extremera & Ramos, 2004) y el PANAS (adaptado por Sandín et al., 1999). Se encontraron niveles altos de neuroticismo y bajos de extraversión, apertura a la experiencia y amabilidad; niveles intermedios de inteligencia emocional y una afectividad positiva predominante. …”
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575
Tratamiento de la colusión en la contratación pública: una visión del caso colombiano
Published 2014-01-01“…Sin embargo, el modelo de sanción establecido en la normativa colombiana, si bien es bastante alto, sobre todo después de la categorización de delito de esta conducta, el verdadero problema radica en la aplicación de la misma, o mejor, en el organismo encargado de su aplicación. …”
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576
RESERVOIR CHARACTERIZATION OF THE CHELA FORMATION OF THE NSIAMFUMU AND LIAWENDA FIELDS IN THE ONSHORE COASTAL BASIN, D.R. CONGO
Published 2024-07-01“…The following observations were obtained: • Wells Lw-1: the formation is characterized by dolomitic limestone and micaceous black shale with a thickness of 34 m having heavy oil indices and an average porosity of 17% and a salinity greater than 300 gr/L; • Well Lw-2: the formation is characterized by islands of sand, coarse sandstone and a few quartz pebbles with a thickness of 10m showing evidence of light oil, gas and an average porosity of 24%; • Shaft Lw-3: the formation is dominated by micaceous shale and dolomite interbeds with a thickness of 14m showing little evidence of hydrocarbons, only salt water and residual oils; • Puits Ns-1: the formation is characterized by beige to grey dolomite, grey shale and white sand with a thickness of 6m showing evidence of light oil and an average porosity of 20%. …”
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577
Climate-driven hydrological sensitivity in Estonian catchments: a northern temperate perspective
Published 2024-12-01“…The research identifies four distinct hydrological behavior clusters: plateau, sandstone upland, carbonate upland, and lowland. Key findings include diverse catchment sensitivities to groundwater recharge, the role of baseflow in streamflow stabilization, the memory effect in catchment responses, and insights from the flow duration curve on flow variability and extremes. …”
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578
Acoustic Emission and Failure Modes for Coal-Rock Structure under Different Loading Rates
Published 2018-01-01“…Considering the combined coal-rock structure for coal bumps, failure process and acoustic emission (AE) characteristics of combined coal-sandstone samples under different loading rates were studied by uniaxial compression tests, and three basic failure modes and bump proneness for coal-rock structure were obtained. …”
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579
Development Characteristics and Sensitivity Analysis of Expansive Soil Slope
Published 2022-01-01“…It is found that the air intake value and residual suction value of filled soil (loose and broken) and completely weathered sandstone are small, and the water holding capacity in the middle suction range is relatively good. …”
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580
Article 151 of The Criminal Code of Ukraine: the challenges of legislative determination and correlation of the objective criterions of the corpus delicti
Published 2020-06-01“…The author has noted on doubtfulness of the content of the sanction of the part of the considered Article in view of the content of responsibility for illegal imprisonment as a crime of a certain kind. …”
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