Results 51 to 60 of about 464 (176)

Strength Analysis of Sound Insulation Body in Ring Groove for Acoustic Logging While Drilling

Shiyou jixie, 2017
The sound insulation body in ring groove is a kind of sound insulation body that is commonly used in the acoustic logging while drilling. The numerical simulation method has been used to study the maximum equivalent stress area of the sound insulation ...
Wu Neng, Zhao Honglin, Liu Xu, Li Yufang
doaj  

Temporal, species‐specific variation in activity patterns of bats (Chiroptera) along a boreal river basin in Västerbotten, Sweden

Wildlife Biology, EarlyView.
Seasonal variation in photoperiods, energetic demands, and reproductive constraints are expected to strongly influence bat activity at high latitudes, yet empirical evidence from boreal systems is limited. We used passive acoustic monitoring to examine spatial, temporal, and feeding activity patterns of bats along a boreal river basin in Sweden (64°N ...
Morgan Hughes, Monika Laux
wiley   +1 more source

Advances in Formation Evaluation and Well Logging Technology: Review of the SPWLA 65th Annual Logging Symposium

Cejing jishu
The Annual Logging Symposium of Society of Petrophysicists and Well Log Analysts (SPWLA) is a key event for the exchange of new theories, methods, technologies, and products in well logging. Based on 145 academic papers presented at the 65th SPWLA Annual
YIN Chengfang, SHEN Zhenzhen, FENG Linwei, DU Xuewei, ZHANG Caitong   +4 more
doaj   +1 more source

Rethinking Spatial Prioritisation for Primate Conservation in an Unprotected Intact Forest Landscape in the Gulf of Guinea

Animal Conservation, EarlyView.
This study highlights the importance of the unprotected Yabassi Key Biodiversity Area, Cameroon, for primate conservation in the Gulf of Guinea biodiversity hotspot. We modelled primate distribution patterns and found that historically overlooked parts of the landscape have high species richness and are critical for some threatened species.
Vianny Rodel Vouffo Nguimdo, Ekwoge Enang Abwe, Nelson Ekole Betobe, Bethan Jane Morgan, Matthias Waltert   +4 more
wiley   +1 more source

Thorncliffe Formation: A proglacial to subglacial lacustrine basin sequence, Greater Toronto Region, Canada

Boreas, EarlyView.
Map of Lower sediment (LS) thickness is a surrogate for the distribution of Thorncliffe Formation (TF) and ~75% of TF thickness from the slope of Niagara Escarpment east to Brighton. Inset images show the LS sequence at the Don Valleys brickyards (DVBY) and undeformed TF sand and gravel (~15 m) below Newmarket Till (NT) at sites L and Co.
David R. Sharpe, Charles E. Logan, Ross D. Knight, Andre J.‐M. Pugin   +3 more
wiley   +1 more source

Discharge Experiment and Structure Optimisation Simulation of Impulse Sound Source

Energies
The wave frequency and energy of traditional piezoelectric emission sources used in acoustic logging are limited, which results in an inadequate detection resolution for measuring small-scale geological formations.
Xu Gao, Jing Zhou, Haiming Xie, Xiao Du
doaj   +1 more source

An experimental approach to assess the combined effects of multiple stressors on a large vertebrate species

Conservation Biology, EarlyView.
Abstract The design of experiments to investigate the combined effects of multiple stressors requires exposing target organisms to multiple combinations of stressor doses. Concurrent manipulation of stressors is often infeasible with wildlife, but long‐lasting health effects allow individual health to be used as an integrator of prior stressor exposure.
Enrico Pirotta, Catriona M. Harris, Lori H. Schwacke, Len Thomas, Jason B. Allen, Aaron A. Barleycorn, Marco Casoli, Jonathan Crossman, Laura Aichinger Dias, Laura Engleby, Erin LaBrecque, Jenny A. Litz, Katherine A. McHugh, Patrick J. O. Miller, Michael J. Moore, Theoni Photopoulou, Brian M. Quigley, Cynthia R. Smith, Brandon L. Southall, Todd R. Speakman, Ryan Takeshita, Christina N. Toms, Randall S. Wells, Eric S. Zolman, Peter L. Tyack   +24 more
wiley   +1 more source

Research and Application of High-Resolution Real-Time Extraction of P-Wave Slowness

Cejing jishu
Acoustic logging is one of the key technologies in oil and gas exploration, where P-wave slowness can be applied for lithology classification, mechanical parameter calculation, and optimization of drilling and completion schemes.
GUO Shangjing, SU Yuanda, ZHANG Liwei, ZHAO Long, LING Zichen   +4 more
doaj   +1 more source

Marine heatwaves shape size‐dependent thermal exposure, habitat use and marine residency in Arctic char (Salvelinus alpinus)

Journal of Fish Biology, EarlyView.
Abstract Marine heatwaves (MHWs) are increasing in high‐latitude oceans, yet behavioural responses of anadromous fishes to these potential stressors during short marine feeding seasons remain poorly understood. We combined acoustic telemetry (internal temperature and depth) with satellite‐derived sea surface temperature data to quantify Arctic char ...
Jessica E. Desforges, David Côté, Joey Angnatok, J. Brian Dempson, Travis E. Van Leeuwen   +4 more
wiley   +1 more source

Beaver dam analogues increase amphibian breeding occupancy and bat activity

Restoration Ecology, EarlyView.
Abstract Introduction Beavers are ecosystem engineers that can create ponds, increase stream complexity, and enhance biodiversity. To mimic these and other effects, restoration practitioners increasingly install beaver dam analogues (BDAs) in degraded streams.
Julianna Hallza, Michael Dello Russo, Lisa Foster, Alex Harwell, Mark Ingman, Alexa Whipple, Jonah Piovia‐Scott   +6 more
wiley   +1 more source