Results 91 to 100 of about 2,317,450 (234)

Beyond Resilience: Measuring the Livelihood Vulnerability of Commercial Livestock Farmers to Drought in South Africa

Sustainable Development, EarlyView.
ABSTRACT Climate change continues to increase the frequency and intensity of events, threatening agricultural production, farmers' livelihoods and the achievement of SDGs 1 and 2 (No Poverty and Zero Hunger). This study examined the effect of agricultural drought on the livelihood vulnerability of commercial livestock farmers in the Northern Cape ...
Hanipher Mili, Yonas T. Bahta, Frikkie Mare, H. N. van Niekerk, Stephen Nyaki   +4 more
wiley   +1 more source

Borehole breakout in heterogeneous rocks using improved Voronoi model: Laboratory test and discrete element modeling

Journal of Rock Mechanics and Geotechnical Engineering
Borehole instability in heterogeneous rocks poses a significant challenge in geo-energy engineering. The deformation and failure around boreholes are heavily mediated by the inherent heterogeneity of rocks.
Yingchun Li, Jiazhi Zhang, Changyi Zuo, Kang Duan   +3 more
doaj   +1 more source

Foamed Concrete Sealing Materials for Coal Seam Gas Drainage Boreholes: A Review

Safety Science and Technology, EarlyView.
This study investigates the sealing performance of foamed concrete in gas drainage boreholes. By comparing leakage pathways (a, c) with sealed systems (b, d), the research demonstrates how foamed concrete effectively fills mining‐induced fractures and resists deformation.
Jiaxing Zou, Erlei Su, Huanchun Liu, Xiangjun Chen, Lin Wang, Haidong Chen, Lin Li   +6 more
wiley   +1 more source

Horizontal borehole azimuth optimization for enhanced stability and coal seam gas production

Rock Mechanics Bulletin
Horizontal boreholes have been widely used to extract natural gas from coal seams. However, these boreholes can encounter severe instability issues leading to production interruption.
Erfan Saber, Qingdong Qu, Saiied M. Aminossadati, Yiran Zhu, Zhongwei Chen   +4 more
doaj   +1 more source

Toward Enhanced Safety Management in Wave Energy Power Plant Construction Projects: FMEA and HAZOP Combination

Safety Science and Technology, EarlyView.
Consolidated FMEA–HAZOP safety management framework for WEC construction projects. ABSTRACT This study presents an advanced safety management framework for “Wave Energy Converter” (WEC) projects, addressing the inherent uncertainty, technological complexity, and environmental exposure of offshore renewable energy systems.
Panagiotis K. Marhavilas, Konstantinos Douitsis, Nick Delianidis, Stefanos Keskinis, Georgios Charalampos Kafoutis   +4 more
wiley   +1 more source

Tunnel assessment with borehole radar

, 2017
The collapse of a tunnel and the damage in a second tunnel during the construction works, forced to the assessment of the ground in the front tunnel of the second structure, in order to avoid additional problems. The first evaluation was carried out with
Caselles Magallón, Josep Oriol, Canas Torres, José Antonio, Clapés Boixader, Jaime, Pérez Gracia, María de la Vega   +3 more
core   +1 more source

AI‐Powered GPR Characterization of Peatland Underground Cavity Induced by Smoldering Wildfire: A Laboratory Proof‐of‐Concept

Safety Science and Technology, EarlyView.
We present an AI‐assisted ground‐penetrating radar framework to noninvasively detect and quantify smoldering wildfire‐induced subsurface cavities in peatlands. A ResNet model accurately predicts cavity geometry from GPR images, enabling improved assessment of underground fire damage and hazards.
Zifan Zhang, Zilong Wang, Yichao Zhang, Yanghan Su, Shaorun Lin, Xinyan Huang   +5 more
wiley   +1 more source

Modelling Patterns of Past Inundation Processes Combining Geoarchaeology and Morphometric Hydrological Analysis in the Shashe‐Limpopo Basin, South Africa

Archaeometry, EarlyView.
ABSTRACT Riverine and valley systems across the globe have been central to the development of past urban centres. By AD 900, the Shashe and Limpopo Rivers seem to have facilitated the interaction and integration of early farming communities in southern Africa. This paper focuses on the application of geoarchaeological perspectives made available by the
B. S. Nxumalo
wiley   +1 more source

Stiffness and strength of shear diaphragms used for stability bracing of slender beams [PDF]

, 2014
Structural Stability Research Council Annual Stability Conference 2014, SSRC 2014; Toronto, ON; Canada; 25 March 2014 through 28 March 2014Light gage metal decking is often used in structures as concrete deck formwork, roof cladding or siding.
Vardaroğlu, Mustafa, Eğilmez, Oğuz Özgür, Akbaba, Andaç   +2 more
core   +1 more source

Refining the timing of Middle Pleistocene (MIS 12 to MIS 6) ice advances into northern central Europe: sedimentological analysis and single‐grain luminescence dating of glaciotectonic complexes and tunnel‐valley fills

Boreas, EarlyView.
We summarize the current state of knowledge on the age of the Middle Pleistocene ice advances into northern central Europe and provide 25 new single‐grain feldspar luminescence ages of Elsterian and Saalian glacigenic sediments to constrain the age of the ice advances and their tentative correlation with marine isotope stages/substages.
Niklas von Soest, Neda Rahimzadeh, Debra Colarossi, Falko Malis, Tobias Lauer, Wera Sander‐Beuermann, Yvonne Spychala, Christian Brandes, Runa Fälber, Sumiko Tsukamoto, Jutta Winsemann   +10 more
wiley   +1 more source