Results 11 to 20 of about 14,496 (185)
Spatial segregation and bycatch risk as potential drivers of population trends of wandering albatrosses at South Georgia. [PDF]
Conserv BiolAbstract Spatial segregation in at‐sea distribution is frequently observed in seabirds and can have important implications for conservation and management. Globally, many albatross and petrel populations are declining due to bycatch in fisheries. In South Georgia, the decrease in wandering albatrosses (Diomedea exulans) differs among breeding sites ...
Warwick-Evans V +3 more
europepmc +2 more sources
American Journal of Community Psychology, Volume 72, Issue 3-4, Page 443-463, December 2023., 2023 Abstract Family caregivers of people with severe mental illness (SMI) have been increasingly observed to experience social isolation and/or loneliness (SI/L) which are risk factors for ill health. This scoping review aimed to map existing evidence and identify knowledge gaps in studies on SI/L in this population using the Arksey and O'Malley's ...
Ziyao Guan +2 more
wiley +1 more source
Compliance with World Health Organization's COVID‐19 guidelines among Iraqi health workers
World Medical &Health Policy, Volume 15, Issue 4, Page 537-543, December 2023., 2023 Abstract During the COVID‐19 pandemic, the World Health Organization (WHO) introduced guidelines with respect to hygiene practices, quarantine policies, and medical practices for health institutions to follow. Most studies examining compliance with WHO guidelines have been conducted at individual level but not at institutional level.
Burhan Hadi +5 more
wiley +1 more source
Use of carrion fly iDNA metabarcoding to monitor invasive and native mammals
Conservation Biology, Volume 37, Issue 5, October 2023., 2023 Abstract Severely fragmented habitats increase the risk of extirpation of native mammal populations through isolation, increased edge effects, and predation. Therefore, monitoring the movement of mammal populations through anthropogenically altered landscapes can inform conservation. We used metabarcoding of invertebrate‐derived DNA (iDNA) from carrion
Kristen Fernandes +5 more
wiley +1 more source
Effects of forest fragmentation on avian breeding activity
Conservation Biology, Volume 37, Issue 4, August 2023., 2023 Abstract Biodiversity declines and ecosystem decay follow forest fragmentation; initially, abundant species may become rare or be extirpated. Underlying mechanisms behind delayed extirpation of certain species following forest fragmentation are unknown.
Charles P. J. Coddington +2 more
wiley +1 more source
智能城市应用, 2018 针对城市轨道交通站台门系统中交流供电模式中的隔离变压器在实际应用中存在的误动误跳、合闸困难、供电稳定性差等技术难题，结合城市轨道交通站台门系统对供电稳定性的特殊要求，对隔离变压器励磁涌流、空载合闸等特性深入理论分析研究，并结合现场测试数据，提出全新理念的安全、可靠、可行的解决方案，更好的满足城市轨道交通站台门系统的的要求，有实际的指导意义和可行性。
思平 桂
semanticscholar +1 more source
水电科技智能电网技术的进步推动了自适应保护与故障隔离在智能供配电系统中的深入研究，该研究领域在电力系统中的地位日益显著。在发生故障时，常规的电力供应和分配网络往往不能自行调整或隔离问题，这就造成了电力稳定性下降和潜在的安全风险。文中首先对智能供配电系统的结构及发展情况进行了详细剖析，并讨论了自适应保护的重要性和基本原理。随后，研究利用了智能算法进行故障检测与隔离的技术。最终，提出了一种融合模型预测控制（MPC）与机器学习的自适应保护新策略。文中通过具体实例探讨 ...
婷婷 陈
semanticscholar +1 more source
A New Adaptive Near Field Isolation Method Based on Controllable Metamaterial [PDF]
, 2016 天线之间的隔离度在许多无线通讯系统中都有要求。在诸如多天线的MIMO 系统、同频双工等等众多实际工程中，天线的隔离度直接决定了工作设备的性能。 而这些天线往往处于彼此的近场，而近场隔离相对于远场有更高的难度。现有的 提高隔离度的方法普遍只能达到30dB到50dB左右的隔离度，并且均是静态方 法。这在实际应用中往往无法满足越来越高的性能和功能要求。 本文提出了一种基于可控超材料和人工智能算法的自适应近场隔离方法。首 先给出了基本的数学模型，并证明该方法的合理性。为了检验理论的正确性，根 ...
于丰畅
core
Functional Ecology, Volume 40, Issue 3, Page 636-654, March 2026.Read the free Plain Language Summary for this article on the Journal blog. Abstract The nested subset pattern (nestedness) has been widely used to explain species distributions in island and fragmented systems. Mountain sky islands serve as critical natural laboratories for understanding the evolutionary consequences of geographic isolation and climate
Caiwen Zhang +5 more
wiley +1 more source
The Causal Relationship of Social Isolation, depression and the risk of Stroke among the Middle-Aged and the Elderly in China [PDF]
, 2016 摘要 目的本研究旨在探索中国中老年人社会隔离、抑郁与脑卒中发病风险的因果关系，以期阐明中国中老年人社会隔离和抑郁与脑卒中发病风险的影响，明晰抑郁在社会隔离和脑卒中发病关系链中的中介效应，进而对中国中老年人有效预防脑卒中提出相关建议。 方法本研究基于中国健康与养老追踪（ChinaHealthandRetirementLongitudinalStudy，CHARLS）调查中2011年-2013年2期的纵向数据，结局变量基于“医生诊断是否患有脑卒中”条目，抑郁变量由流调中心抑郁量表 ...
马佳平
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