检索结果-南通市图书馆

Ecology and management of rodents in no-till agriculture in Washington, USA

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Integrative Zoology 2007年第3期2卷 154-164页

作者： Gary WITMER Rodney SAYLER David huggins Jason CAPELLI US Department of Agriculture/Animal and Plant Health Inspection Service/Wildlife Services National Wildlife Research CenterFort CollinsColoradoUSA Washington State University PullmanWashingtonUSA

No-till farming is an important approach to sustainable agriculture because it can conserve soil and water ***, rodent populations can thrive under no-till conditions because burrow systems are not disrupted byannual plowing and plant residues build-up on the surface, providing cover and insulation. This can result in substantialcrop damage. We assessed rodent populations, habitat use, food habits, and crop damage in a no-till croppingsystem in Washington, USA. We also conducted preliminary trials of methods to reduce rodent populationsand crop damage. In the fall, many more rodents were captured in fields with unharvested crops than in fieldscontaining only plant stubble, suggesting that rodents leave fields after crop harvest, providing that suitable habitatsare nearby, even when adequate cover is still available in harvested crop fields. By spring, the number of volescaptured was much lower relative to fall. Despite this, capture rates were much higher in surrounding permanentgrass areas than in crop (barley, wheat, pea) fields, suggesting that these grassy areas serve as refugia for ***, the permanent grass cover type was the landscape variable most associated with rodent capture *** three winter pea fields, rodents removed 5–15% of the pea plants over winter. Examination of stomach contentsrevealed that voles mainly fed on grain plants in spring, but that their diet was more diversified in fall. Deer micefed heavily on grain plants in both spring and fall, but also used insects as food. Metal barrier exclosures (9 m × 9m), extending above and below ground, did not prevent access by rodents. Rodent populations in areas treated withzinc phosphide on grain were comparable to untreated areas 1 year after application of the rodenticide, perhaps becauseof immigration and recruitment, suggesting that baiting does not provide a long-term solution to rodent damagein no-till agricultural fields.

关键词： agriculture damage deer mouse feeding ecology Microtus Peromyscus rodent vole

A nonparametric estimation of the infection curve

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2011年第9期54卷 1815-1828页

作者： LIN HuaZhen YIP Paul S. F huggins Richard M School of Statistics Southwestern University of Finance and Economics Chengdu 611130 China Social Work and Social Administration University of Hong Kong Hong Kong China Department of Mathematics and Statistics The University of Melbourne Melbourne Australia

Predicting the future course of an epidemic depends on being able to estimate the current numbers of infected ***,while back-projection techniques allow reliable estimation of the numbers of infected individuals in the more distant past,they are less reliable in the recent *** propose two new nonparametric methods to estimate the unobserved numbers of infected individuals in the recent past in an *** proposed methods are noniterative,easily computed and asymptotically normal with simple variance *** show that the proposed methods are much more robust and accurate than the existing back projection method,especially for the recent past,which is our primary *** apply the proposed methods to the 2003 Severe Acute Respiratory Syndorme(SARS) epidemic in Hong Kong.

关键词： epidemic back-projection nonparametric method infection curve

Visually Modelling Collaborative Research into Innovative Community Disaster Resilience Practice,Strategy,and Governance

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2015年第3期6卷 282-294页

作者： Thomas J.huggins Robin Peace Stephen R.Hill David M.Johnston Alicia Cuevas Muniz Joint Centre for Disaster Research School of PsychologyMassey University School of Psychology Massey University School of Psychology Massey University Joint Centre of Disaster ResearchMassey University Faculty of Science University of Colima

In 2013 a new collaborative center was established in Wellington, New Zealand to focus on integrating resilience research with the region’s community disaster resilience strategy. An earlier study with parties to this center had indicated that researcher and practitioner groups were divided by attention to their own immediate knowledge and skills, but agreed there was a need to maximize community resilience benefits amongst a regional population. An action research workshop of researchers and practitioners used a visual logic model to focus on the pragmatic benefits of improving community resilience. The visual logic model was used to design research activities that would improve the regional community resilience strategy, which was still in an early implementation *** of 14 workshop participants were interviewed following the workshop. Statistical content analysis of interview data highlighted certain strengths of the action research process: visual monitoring and evaluation planning was a catalyst for complicated conversations between two very different groups of professionals; and researchers became more focused on practical issues as a result. Other findings suggested that in future collaborative researchgovernance would benefit from wider cycles of strategic intelligence, enhanced research contributions, and the use of different information formats for different *** formats for different purposes should also be considered when developing and implementing large-scale disaster risk reduction policies and strategies.

关键词： Collaborative research Community resilience Content analysis Emergency management Visual communication

Canadian Undergrads Say They Are Stressed

在线全文

学校读者我要写书评

暂无评论

当代外语研究 2001年第11期 10-11页

作者： CharniciaE.huggins 叶爱堤

我在清华大学教书,同时还兼任班主任工作。我和学生接触比较多。特别是刚入学的新生。所以,当我在网上读到此文时,产生了强烈共鸣,觉得很有必要将此文推荐给更多的读者。大一学生在入学的短暂的兴奋之后。各种问题和冲突便接踵而来,精... 详细信息

我在清华大学教书,同时还兼任班主任工作。我和学生接触比较多。特别是刚入学的新生。所以,当我在网上读到此文时,产生了强烈共鸣,觉得很有必要将此文推荐给更多的读者。大一学生在入学的短暂的兴奋之后。各种问题和冲突便接踵而来,精神压力巨大。本文用who are suffering来形容大一学生,并非危言耸听,女生尤烈。 Distress levels also decreased with each year of undergraduate study, and with increasing involvement in parties, athletics, and recreation. 此言千真万确。此言同时告诉我们:鼓励学子得到increasing involvement in parties,athletics,and recreation是何等重要。读者朋友,你的子女若刚刚跨入大学之门,本文的这句话可得牢记: If you have children who are in college,be supportive,be nurturing(给予足够的营养)and look for signs.

关键词： Canadian Undergrads Say They Are Stressed

Type A People May Have Lower Quality of Life:Study

在线全文

学校读者我要写书评

暂无评论

当代外语研究 2003年第7期 5-7页

作者： Charnicia E.huggins 占存存

一项小型研究发现,具有A型个性者(其表现特征为易怒,敌意,急躁)其生活质量似乎就比较低。

关键词： Type A People May Have Lower Quality of Life:Study 圣地亚哥

Risk Evaluation Based on Variable Fuzzy Sets and Information Diffusion Method

在线全文

学校读者我要写书评

暂无评论

Journal of Applied Mathematics and Physics 2020年第5期8卷 821-830页

作者： W. Gong K. Chen T. J. huggins L. Yang Southern University of Science and Technology Shenzhen China Department of Mathematical Southern University of Science and Technology Shenzhen China

Risk evaluation is an effective way to reduce the impacts of natural hazards and it plays an increasingly important role in emergency management. Traditional methods of assessing risks mainly utilize Geographic Information System (GIS) to get risk map, and information diffusion method (IDM) to deal with incomplete data sets. However, there are few papers discuss the uncertainty of integrated hazards and consider dynamic risk under time dimension. The model proposed in this study combines the variable fuzzy set theory with information diffusion method (VFS-IDM) to solve the uncertainness of multiple hazards dynamic risk assessment when data sets are incomplete. This study employs fuzzy set theory (VFS) to calculate the relative membership degree and applies information entropy method (IEM) to obtain the weights of criteria indicators for multiple hazards evaluation. Then applies information diffusion method (IDM) to estimate condition probability distribution and vulnerability curve with the VFS-IEM model results, time data and multiple hazards losses. Then the expected value of multiple hazards dynamic risk can be calculated by using the normal information diffusion estimator so as to improve the accuracy of risk evaluation results.

关键词： Risk Evaluation Integrated Risk Dynamic Risk Fuzzy Sets VFS-IDM

乙醇对肌肉卫星细胞myogenin表达的影响

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

东南大学学报（医学版） 2012年第6期31卷 674-680页

作者：沈干吴京 Gordon huggins 南京医科大学第二附院东院整复外科江苏南京210003 New England Medical Center Tufts University

目的:探讨慢性酒精中毒过程中乙醇对肌肉卫星细胞myogenin表达的影响及其在酒精性肌肉损伤中的作用。方法:(1)体外实验:取Sprage-Dowley大鼠,原代培养大鼠肌肉卫星细胞,设实验组(乙醇作用组)与对照组(正常培养液对照组),培养细胞至80%... 详细信息

目的:探讨慢性酒精中毒过程中乙醇对肌肉卫星细胞myogenin表达的影响及其在酒精性肌肉损伤中的作用。方法:(1)体外实验:取Sprage-Dowley大鼠,原代培养大鼠肌肉卫星细胞,设实验组(乙醇作用组)与对照组(正常培养液对照组),培养细胞至80%融合时,更换为分化培养液,对实验组与对照组卫星细胞形成的肌管计数,并观察卫星细胞myogenin的表达。(2)动物实验:予小鼠乙醇饮食(1个月)制造乙醇中毒动物模型,在损伤后肢肌肉后第2、7天取组织切片观察损伤部位肌肉卫星细胞增殖及新肌束形成情况。结果:实验组肌管计数及卫星细胞myogenin的表达均低于对照组(P0.05)。结论:乙醇可以通过降低肌肉卫星细胞的myogenin表达抑制其肌性分化,减少卫星细胞形成肌管的数量。

关键词：肌肉卫星细胞乙醇 myogenin 分化