Results 11 to 20 of about 12,716 (121)

A link between increased temperature and avian body condition in a logged tropical forest

Conservation Biology, EarlyView.
Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi, Geoffrey Muhanguzi, David Eryenyu, Patrick Arua, Mnason Tweheyo, Michael A. Patten, Amy Elizabeth Eycott, Fred Babweteera   +7 more
wiley   +1 more source

Distribution, scale, and drivers of mass mortality events in Europe's freshwater bivalves

Conservation Biology, EarlyView.
Abstract Mass mortality events (MMEs) are decimating populations and compromising key ecosystem functions around the globe. One taxon particularly vulnerable to MMEs is freshwater bivalve mollusks. This group has important ecosystem engineering capacities and includes highly threatened and highly invasive taxa.
Daniel A. Cossey, Maria Urbańska, Ronaldo Sousa, Juergen Geist, Anna Maria Labecka, Şebnem Atasaral, Maciej Bonk, Liliya Bylyna, Frank P. L. Collas, Daniel Daill, Andreas H. Dobler, Noé Ferreira‐Rodríguez, Dariusz Halabowski, Martina I. Ilarri, Jasna Lajtner, Jon H. Mageroy, Evelyn A. Moorkens, Javier Morales, William H. Morgan, Grégory Motte, Keiko Nakamura, Paz Ondina, Martin Österling, Małgorzata Ożgo, Momir Paunović, Vincent Prié, Maja Raković, Larysa Shevchuk, Spase Shumka, Mikhail O. Son, Jouni Taskinen, Frankie Thielen, Henn Timm, Jelena Tomović, Dariusz Ulikowski, Gorazd Urbanič, Simone Varandas, Agnieszka Izolda Wasilewska, Niklas Wengström, David C. Aldridge   +39 more
wiley   +1 more source

高压阀式避雷器全伏秒特性数据处理(续)

Dianci bileiqi, 1982
六、二维正态分布试验数据表明,在一定条件下,可以接受避雷器的放电电压u及预放电时间t服从二维正态分布的假设,则在确定了有关的分布参数后,就不难决定一定置信概率条件下,u、t的置信范围。由此即可使避雷器的所谓“最大”、“最小”放电电压,伏秒特性的上下包线等等有了确切的含义。
王秉钧
doaj  

Informing spatial conservation prioritization with species’ traits

Conservation Biology, EarlyView.
Abstract New Guinea, the most botanically diverse island on the planet, is the location for one of the boldest conservation initiatives. The Manokwari Declaration aims to achieve 70% conservation designation for the Bird's Head Peninsula. This is 40% higher than the 2022 Global Biodiversity Framework target.
Liam A. Trethowan, Laura Jennings, Haerul Arifin, Renata Borosova, Gemma L. C. Bramley, Marie Briggs, Osanna Chu, Ruth P. Clark, Sally Dawson, Kiran L. Dhanjal‐Adams, Yance de Freitas, James Hartup, Edward G. E. Heatubun, Cecilia Lee‐Grant, Laurensia V. Mapandin, Jonni Marwa, Alison Moore, Agustinus Murdjoko, Carmen Puglisi, André Schuiteman, Dave J. I. Seaman, Nurhaidah Sinaga, Matthew J. Struebig, Anna Trias Blasi, Timothy Utteridge, Maria Voigt, Jimmy F. Wanma, Charlie D. Heatubun   +27 more
wiley   +1 more source

基于Matlab的ZnO压敏陶瓷几何效应研究

Dianci bileiqi, 2013
ZnO压敏陶瓷击穿场强E1mA由晶粒尺寸和单个晶界击穿电压两个因素共同决定,沿用之前提出的微观结构模型,在晶粒尺寸一定,晶界电压服从正态分布;晶界电压一定,晶粒尺寸服从正态分布;和晶粒尺寸、晶界电压都服从正态分布三种条件下,用Matlab分别模拟击穿场强随厚度的变化关系,结果表明ZnO压敏陶瓷击穿场强的几何效应主要来自晶粒尺寸和分布的影响。在此基础上,对初始厚度不同的试样进行击穿场强与厚度的关系模拟,从结果可以看到,无论是高击穿场强还是低击穿场强的试样,都存在几何效应。
鲍婕, 王政留, 李盛涛
doaj  

Geographic risks to functional groups of mammals and birds from habitat loss in Mexico

Conservation Biology, EarlyView.
Abstract There is a need to quantify the impact of habitat loss due to anthropogenic factors on different aspects of biodiversity, such as functional trait diversity represented by functional groups (FGs). We developed a metric to assess the weighted risk of loss of habitat for 33 FGs of mammals and 36 FGs of birds in Mexico based on potential ...
Fernando Mayani‐Parás, Francisco Botello, Claudia E. Moreno, Griselda Escalona‐Segura, Víctor Sánchez‐Cordero   +4 more
wiley   +1 more source

棒形抗折试条的统计强度

Dianci bileiqi, 1980
本文研究了具有内部微观结构缺陷的瓷件在单轴向应力状态下强度的维布尔分布,给出δu=0情况下决定维布尔参数的一个图解方法。根据维布尔分布导出抗折瓷件在一定可靠性下极限应力下限值的计算公式,并比较了按维布尔分布和按正态分布计算的在相同可靠性下瓷件极限应力下限值的结果,结果表明按维布尔分布计算的下限位偏于安全。
马功勋, 刘长荣, 陶增炎
doaj  

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

Conservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando, Guillem Pocull, Sara Fraixedas, Anna Gamero, David Martí, Oriol Solà, Dani Villero, Verena Keller, Petr Voříšek, Alena Klvaňová, Gabriel Gargallo, Vitalie Ajder, Marc Anton, Ainars Aunins, Dawn Balmer, Mattia Brambilla, Tomasz Chodkiewicz, Przemysław Chylarecki, Cristi Domșa, Vlatka Dumbović Mazal, Virginia Escandell, Néstor Fernández, Ruud Foppen, Juan Gallego‐Zamorano, Carlos Godinho, Irene Guerrero, Christina Ieronymidou, Frédéric Jiguet, Aleksi Lehikoinen, Primož Kmecl, Peter Knaus, Lechosław Kuczyński, Åke Lindström, Qenan Maxhuni, Blas Molina, Jean‐Yves Paquet, Maria Luisa Paracchini, Danae Portolou, Draženko Z. Rajković, Dimitrije Radišić, Jiří Reif, Paul Shimmings, Henk Sierdsema, Jovica Sjeničić, Karel Šťastný, Bård G. Stokke, Nicolas Strebel, Zoltán D. Szabó, Tibor Szép, Norbert Teufelbauer, Nicolas Titeux, Sven Trautmann, Judit Veres‐Szászkac, Thomas Vikstrøm, Lluís Brotons   +54 more
wiley   +1 more source

中国广东籍汉族人细胞色素 P4502E1 基因 5′ 侧翼区多态性

Zhongshan Daxue xuebao. Yixue kexue ban, 1999
目的: 探讨中国广东籍汉族人细胞色素 P4502E1 基因 5′侧翼区的多态性分布规律。 方法: 利用聚合酶链反应和 Rsa Ⅰ 、Pst Ⅰ限制性片段长度多态性( PCR-RFLP)技术对 82 名正常中国广东籍汉族人的细胞色素 P4502E1 基因 5′侧翼区的 多态性进行了检测。结果: 82名正常中国广东籍汉族人的细胞色素 P4502E1 基因 5′侧翼区 C1(Rsa Ⅰ +, Pst Ⅰ-)、C2(Rsa Ⅰ-, Pst Ⅰ +)等位基因频率分别为 0. 854, 0.
王　建　刘焯霖　黎锦如　邵　明　潘锡榜　陈　彪
doaj  

Attainment Pairing Effects on Cognitive Conflict in Technology‐enhanced EFL Cooperative Tasks

International Journal of Applied Linguistics, EarlyView.
ABSTRACT This study examines how attainment pairing (high‐high versus high‐low versus low‐low attainment) impacts English as a Foreign Language (EFL) learner engagement during technology‐enhanced cooperative writing tasks. Seventy‐eight Chinese university learners formed 39 dyads (13 pairs per group) via Tencent Meeting.
Ying Liu, Allen Thurston
wiley   +1 more source