Results 61 to 70 of about 835,260 (355)

Seasonal Variation in Hip Fracture Mortality

Geriatric Orthopaedic Surgery & Rehabilitation, 2017
Objectives: This study aims to identify if wintertime surgery increases the mortality of the patients after hip fracture operations. Design: Retrospective observational cohort study.
Dennis K. H. Yee MBBS, FRCS, FHKAM, Christian Fang MBBS, FRCS, FHKAM, T. W. Lau MBBS, FRCS, FHKAM, Terence Pun MBBS, FRCS, FHKAM, T. M. Wong MBBS, FRCS, FHKAM, Frankie Leung MBBS, FRCS, FHKAM   +5 more
doaj   +1 more source

Photothermomechanically Efficient, Low‐Cost, High‐Cycle‐Life, Hybrid MXene‐Polymer Actuators

Advanced Materials Technologies, EarlyView.
The addition of MXenes to elastomer‐plastic‐paper films enables the creation of easily prepared actuators that are scalable for small robotic applications. Known as MXene‐polymer Trilayer Actuators (MPTAs), they bend from UV light. Their usefulness is demonstrated through kirigami‐inspired flower‐shaped art design, parallel manipulator for waveguiding,
Ken Iiyoshi, Georgios Korres, Orsolya Nagy, Gabriel Roldán, Panče Naumov, Stefan Schramm, Mohamad Eid   +6 more
wiley   +1 more source

From Lab to Landscape: Environmental Biohybrid Robotics for Ecological Futures

Advanced Robotics Research, EarlyView.
This Perspective explores environmental biohybrid robotics, integrating living tissues, microorganisms, and insects for operation in real‐world ecosystems. It traces the leap from laboratory experiments to forests, wetlands, and urban environments and discusses key challenges, development pathways, and opportunities for ecological monitoring and ...
Miriam Filippi
wiley   +1 more source

Seasonal Characteristics of Mesospheric Plasma and Their Transitions [PDF]

, 1984
The main seasonal features of the middle atmosphere are arising from the different dynamical basic states in winter and summer. The development of the two controversial circulation systems and the also different peculiarities of transition between them ...
Lauter, E. A.
core   +1 more source

Ecosystem‐Centered Robot Design: Toward Ecoresorbable Sustainability Robots (ESRs)

Advanced Science, EarlyView.
Robots exploring natural ecosystems can support monitoring and conservation, but must adopt ecosystem‐centered design to avoid pollution, waste, and damage. This review proposes guidelines for co‐designing ecoresorbable sustainability robots (ESRs), uniting materials, robotics, and ecological contexts in a single framework.
Tülin Yılmaz Nayır, Yuan Fang, Consuelo Contreras, Andrew K. Schulz, Florian Hartmann   +4 more
wiley   +1 more source

Daily monthly and seasonal variation in PSA levels and the association with weather parameters [PDF]

, 2010
International audienceProstate-specific antigen (PSA) levels have shown daily and seasonal variation, although data are conflicting regarding the season with higher PSA levels and the clinical relevance of this.
Bailie, J., Black, A., Connolly, D., Gavin, Anna, Keane, P. F., Murray, L. J., Van Leeuwen, P. J.   +6 more
core   +2 more sources

A Cold Stress‐Activated Endocrine Sentinel Chemical Hormone Promotes Insect Survival via Mitochondrial Adaptations Through the Adipokinetic Hormone Receptor

Advanced Science, EarlyView.
Seasonal cold adaptation is vital for insect survival, yet the molecular mechanisms linking diapause to mitochondrial resilience remain largely unresolved. We identify ascaroside C9 (asc‐C9) as a key endocrine signal that enhances diapause survival during cold stress by activating the AKHR–PGC1α–UCP4 axis, thereby driving cold‐induced lipolysis and ...
Jiao Zhou, Junxian Chen, Hongxia Zhang, Lu Guo, Kevin Mai, Elijah Abraham, Dilip V. Prajapati, Yue Chang, Jing Ning, Xinchen Wang, Defeng Li, Dan‐Dan Zhang, Jianghua Sun, Rebecca A. Butcher, Lilin Zhao   +14 more
wiley   +1 more source

Genomics Insights Into High‐Latitude Adaptation of Tibetan Macaques

Advanced Science, EarlyView.
Tibetan macaques exhibit unique adaptations to cold, high‐latitude environments, including shortened tails and enhanced fat storage. Genomic analyses reveal a species‐specific TBX6 mutation linked to tail reduction and selection on lipid metabolism genes.
Rusong Zhang, Ying Hu, Yang Teng, Jiwei Qi, Yangzhen Ciren, Lin Zhang, Qiao Du, Wencai Xu, Liang Zhou, Zhenxin Fan, Jinchuan Xing, Ming Li, Jing Li   +12 more
wiley   +1 more source

Calling phenology of four anurans in tropical Mexico

Revista Mexicana de Biodiversidad, 2020
Anuran vocalizations transmit relevant information that aids in individual recognition and sexual selection by females. When studied over time, vocalizations can help us to understand reproductive phenology.
Ricardo Figueroa-Huitrón, Leticia M. Ochoa-Ochoa, Daniel Sánchez-Ochoa   +2 more
doaj   +1 more source

Seasonal Solow residuals and Christmas: a case for labor hoarding and increasing returns [PDF]

In aggregate unadjusted data, measured Solow residuals exhibit large seasonal variations. Total Factor Productivity grows rapidly in the fourth quarter at an annual rate of 16 percent and regresses sharply in the first quarter at an annual rate of ?24 ...
Charles L. Evans, R. Anton Braun
core