Results 61 to 70 of about 34,282 (303)

Research progress and current status of dynamic wave propagation characteristics in rock mass: A review

Deep Underground Science and Engineering, EarlyView.
This review elucidates the velocity–dispersion–attenuation coupling mechanisms of wave propagation in rock masses, compares six representative models, and reveals how pressure, temperature, mineral composition, and anisotropy jointly control dynamic responses in complex geological media.
Jiajun Shu, Tao Li, Ruiqi Yuan, Yue Li, Bingni Wu, Bo Liu, Zhengding Deng, Galindo Rubén, Fausto Molina‐Gómez   +8 more
wiley   +1 more source

Thermal‐induced fracture evolution and acoustic signature of Beishan granite: Insights into tensile strength of barrier system for high‐level radioactive waste disposal

Deep Underground Science and Engineering, EarlyView.
The tensile strength of granite, a proposed host for nuclear waste, degrades severely above 400°C. We link this to specific microcracking patterns captured by acoustic emission, establishing a scientific basis for assessing repository safety under thermal load.
Wei Zeng, Shijie Li, Xiaozhao Li, Zhen Huang, Shangtong Yang, Wentao Xu, Biao Wang, Yun Wu   +7 more
wiley   +1 more source

Importância das espécies minerais no potássio total da fração argila de solos do Triângulo Mineiro Importance of mineral species in total potassium content of clay fraction in soils of the Triângulo Mineiro, Minas Gerais State, Brazil

Revista Brasileira de Ciência do Solo, 2003
Poucos trabalhos relacionam a reserva de K em solos desenvolvidos sob clima tropical úmido com os minerais presentes na fração argila. Com esse propósito, coletaram-se amostras de 19 solos no Triângulo Mineiro, originados de diferentes materiais de ...
V. F. Melo, G. F. Corrêa, P. A. Maschio, A. N. Ribeiro, V. C. Lima   +4 more
doaj   +1 more source

Numerical investigation of natural fracture activation and leakage risk during CO2 sequestration in depleted sandstone reservoirs

Deep Underground Science and Engineering, EarlyView.
This study investigates the hydro‐mechanical response and fracture evolution in depleted sandstone reservoirs during CO2 injection, considering both direct wellbore injection and hydraulic‐fracture‐assisted injection. The graphical abstract illustrates how CO2 injection induces dynamic stress redistribution, leading to natural fracture activation ...
Haiyang Wang, Chen Lu, Yufei Wang, Yichen Yang, Xu Su, Desheng Zhou, Qingqing Wang   +6 more
wiley   +1 more source

Impact of Sahelian Climate Variables on Solar Photovoltaic Output

Energy Science &Engineering, EarlyView.
ABSTRACT Solar photovoltaic (PV) energy is a critical pathway for advancing the energy transition in the Sahel. However, PV module performance in this region is strongly constrained by extreme climatic conditions. This study investigates the effects of (1) wind speed, (2) relative humidity, (3) temperature, (4) dust deposition, and (5) solar irradiance
Koraou Nomaou Abdou‐Rahimou, Adamou Hassane, Ayouba Mahamane Abdoulkadri, Alio Sanda Mahamadou Djibrilla, Moumouni Yacouba, Adamou Rabani   +5 more
wiley   +1 more source

The Effects of Mixed Source Fertilizer Application on Vertisol Fertility and Growth of Mustard [PDF]

Journal of Tropical Soils, 2017
Soil fertility is a crucial factor determining the growth and yield of plants. The increase of nutrient content and availability in soil can be achieved by fertilization.
Jauhari Syamsiyah, Sumarno, Suryono, Nur Echsan Muhamat Rajab, Ida Aryaningrum   +4 more
doaj   +1 more source

Geochemistry and Geochronology of Magmatic Rocks in Southwestern and Northeastern Cambodia: Implications for the Tectonic Evolution and Metallogenesis of the Loei Fold Belt

Geological Journal, EarlyView.
The composition of intrusive rocks suggests that the magma was likely generated in a subduction‐related setting. The arc crustal thickness in the Phnom Sro Ngam and Halo Prospects was probably < 40 km during emplacement. Zircon U–Pb age range indicates a correlation with Loei Fold Belt magmatic activity.
Sirisokha Seang, Khin Zaw, Kakda Kret, Ivan Belousov, Kotaro Yonezu, Koichiro Watanabe, Charles Makoundi   +6 more
wiley   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

BEHAVIOR OF MINERALS IN AGRO SODDY PODZOLIC SOILS RESULTED FROM DIFFERENT RATES OF ORGANIC FERTILIZERS

Бюллетень Почвенного института им. В.В. Докучаева, 2014
The experimental results showed the impact rendered by different rates of organic fertilizers in the kind of poultry excrements on crystallochemical parameters of minerals containing in the fine-dispersed fractions (less than 1, 1-5, 5-10 mkm).
N. P. Chizhikova, E. B. Varlamov, V. I. Savich   +2 more
doaj   +1 more source

RESPONSE OF RUTA GRAVEOLENS L. TO ROCK PHOSPHATE AND /OR FELDSPAR UNDER BIOLOGICAL FERTILIZERS [PDF]

Arab Universities Journal of Agricultural Sciences, 2007
Two experiments were consummated at the Experimental Farm, National Research Center (NRC), Dokki, Cairo, Egypt during two succes-sive seasons of 2004/2005 and 2005/2006 to eval-uate the effect of natural products as a source of some important elements ...
Khalid Khalid, Soheir EL-Sherbeny, A Shafei   +2 more
doaj   +1 more source