Results 281 to 290 of about 22,874 (334)

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

A perspective on competitive freeride skiing and snowboarding. [PDF]

Front Physiol
Mulder E, Holmberg HC, Supej M.
europepmc   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Nanga Parbat - The mountain of destiny. [PDF]

Exp Physiol
Bärtsch P.
europepmc   +1 more source

Effect of an on-sight lead on the physiological and psychological responses to rock climbing [PDF]

Blackwell, Gavin, Draper, Nick, Fryer, Simon, Hodgson, Christopher I., Jones, Glenys A.   +4 more
core  

Developing a macroecology for human‐altered ecosystems

Ecography, EarlyView.
Although anthropogenically‐induced ecological disruptions are fundamentally important in defining ecosystem properties, they are largely overlooked by macroecological theory. Anthropogenic disruptions and their effects are generally not comparable to one another, nor to disturbances that are part of natural disturbance regimes.
Erica A. Newman, Mark Q. Wilber, Alexandre Génin, Oriana E. Chafe, Henry F. Houskeeper, Steven Lee, Eric L. Berlow, John Harte   +7 more
wiley   +1 more source

Comparative efficacy of different dietary interventions for cardiopulmonary fitness at high altitude: a systematic review and network meta-analysis. [PDF]

Front Nutr
Wang B, Xiong Y, Lin N, Shi J, Zou B, Ma X, Zeng K, Kang C.   +7 more
europepmc   +1 more source

The scaling of seed‐dispersal specialization in interaction networks across levels of organization

Ecography, EarlyView.
Natural ecosystems are characterized by a specialization pattern where few species are common while many others are rare. In ecological networks involving biotic interactions, specialization operates as a continuum at individual, species, and community levels. Theory predicts that ecological and evolutionary factors can primarily explain specialization.
Gabriel M. Moulatlet, Pedro Luna, Wesley Dáttilo, Fabricio Villalobos   +3 more
wiley   +1 more source

Psychological traits of extreme sport participants: a scoping review. [PDF]

BMC Psychol
Martinho DV, Gouveia ÉR, Field A, Ribeiro A, Ordoñez-Saavedra N, Pereira F, Braz DS, Rebelo A, Sarmento H.   +8 more
europepmc   +1 more source

Influencing factors of sports tourism safety accidents in Tibet, China: fsQCA analysis based on the SCM. [PDF]

PLoS One
Wu K, Xing A, Zhou J, Su L, Zhang S, Yang S.   +5 more
europepmc   +1 more source