首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   374篇
  免费   4篇
安全科学   7篇
废物处理   3篇
环保管理   19篇
综合类   174篇
基础理论   75篇
环境理论   2篇
污染及防治   66篇
评价与监测   19篇
社会与环境   12篇
灾害及防治   1篇
  2021年   3篇
  2019年   5篇
  2018年   10篇
  2017年   13篇
  2016年   8篇
  2015年   10篇
  2014年   11篇
  2013年   16篇
  2012年   13篇
  2011年   15篇
  2010年   12篇
  2009年   12篇
  2008年   7篇
  2007年   14篇
  2006年   12篇
  2005年   4篇
  2004年   6篇
  2003年   6篇
  2002年   8篇
  2000年   3篇
  1999年   10篇
  1998年   3篇
  1994年   4篇
  1988年   5篇
  1987年   6篇
  1986年   4篇
  1985年   7篇
  1971年   3篇
  1970年   4篇
  1967年   6篇
  1965年   6篇
  1964年   7篇
  1963年   3篇
  1962年   7篇
  1961年   3篇
  1960年   5篇
  1958年   4篇
  1957年   3篇
  1956年   4篇
  1955年   3篇
  1954年   7篇
  1952年   4篇
  1942年   4篇
  1939年   5篇
  1938年   2篇
  1937年   2篇
  1933年   2篇
  1931年   4篇
  1926年   3篇
  1920年   2篇
排序方式: 共有378条查询结果,搜索用时 31 毫秒
311.
Recent research indicates that sustainability assessment tools (SAT) for farms need to be contextually adapted to be acceptable and useful. Focusing specifically on social sustainability, this study sought to identify important aspects of relevance for Swedish (livestock) farmers’ social situation and compare these aspects with social indicators used in three existing SATs (RISE, SAFA, IDEA). A survey revealed that social issues of key importance for the self-reported overall life satisfaction of Swedish livestock farmers are: having a good financial situation, having a similar standard of living as others, not experiencing too much stress, having meaningful work, having decent working hours, and having a desirable family situation. Of the three SATs evaluated, RISE appears best equipped to capture the social situation of Swedish farmers but does not fully address the aspect of finding work meaningful. SAFA and IDEA both fail to capture many aspects of importance for describing the social situation of Swedish farmers. We present a novel method for testing the relevance of social indicators for farmers in a specific context. Applying this method before choosing, applying, and adapting SATs for farm-level sustainability assessments would increase the relevance of the social sustainability dimension, but deeper stakeholder engagement than offered by our survey is needed.  相似文献   
312.
Abstract

Objective: A number of studies have already grouped cyclists according to different aspects of their mobility behavior. This could be used e.g., to improve the bicycle infrastructure planning, to detect critical spots and, to reduce obstacles for cycling. This wide, preexisting, range of cyclist typologies usually concentrates on one or two influence factors and differs, content-wise, in both factors used, as well as, methodically. Based on existing cyclist typologies we extracted all possible influence factors to integrate them in one single questionnaire. The objective of this study, using an empirical, based approach, is to compare this typology of cyclists with existing ones, integrating all known influence factors of recent studies.

Methods: To address these issues, we conducted a Germany-wide online survey on cycling behavior, covering all relevant aspects we derived from both literature and especially, former cyclist typology studies including: social factors; the impact of environmental, individual; and route factors; as well as motives. The main goal was to identify distinct types of cyclists, and describe them as detailed as possible. The heterogeneous sample included a total of 10,294 responses.

Results: Using factor and cluster analyses, a multidimensional typology with four groups of cyclists was derived which were interpreted as: ambitious, functional, pragmatic, and passionate cyclists. In addition, socio-economic factors, cyclist’s motivation, and crash history were analyzed.

Conclusion: The results produced by grouping different characteristics of cyclists can lead to policy recommendations or communal bicycle traffic planning. Policy planners can estimate reactions of the different types on interventions and adjust their decisions which can serve to support already passionate cyclists or, encourage normally under-represented infrequent cyclists to cycle more. The extent of perceived safety plays here an important role in the classification, e.g., the handling of high-risk areas for crashes.  相似文献   
313.
314.
Entomophagy—eating insects—is getting a lot of attention these days. However, strict vegans are often uncomfortable with entomophagy based on some version of the precautionary principle: if you aren’t sure that a being isn’t sentient, then you should treat it as though it is. But not only do precautionary principle-based arguments against entomophagy fail, they seem to support the opposite conclusion: strict vegans ought to eat bugs.  相似文献   
315.
316.
317.
318.
319.
320.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号