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   321篇
  免费   10篇
教育   258篇
科学研究   29篇
各国文化   4篇
体育   21篇
文化理论   3篇
信息传播   16篇
  2023年   1篇
  2022年   6篇
  2021年   4篇
  2020年   12篇
  2019年   18篇
  2018年   26篇
  2017年   17篇
  2016年   19篇
  2015年   14篇
  2014年   16篇
  2013年   75篇
  2012年   18篇
  2011年   14篇
  2010年   8篇
  2009年   10篇
  2008年   7篇
  2007年   8篇
  2006年   6篇
  2005年   8篇
  2004年   2篇
  2003年   5篇
  2002年   4篇
  2001年   4篇
  2000年   5篇
  1999年   6篇
  1998年   2篇
  1997年   2篇
  1993年   1篇
  1991年   1篇
  1989年   3篇
  1988年   1篇
  1987年   1篇
  1986年   1篇
  1985年   1篇
  1984年   1篇
  1980年   2篇
  1978年   1篇
  1977年   1篇
排序方式: 共有331条查询结果,搜索用时 24 毫秒
31.
Abstract

In many countries agriculture is in a process of rapid change,
  • - it has to meet a growing demand for food in a sustainable way,

  • - the international competition is increasing,

  • - the increase in labour productivity is decreasing the employment opportunities in agriculture,

  • - agricultural research is offering many new opportunities to increase productivity,

  • - government price support for agricultural products in industrial countries is decreasing.

These changes have many implications for agricultural extension, such as:
  • - the knowledge and capabilities of farmers has become a major factor in their ability to compete in national and international markets,

  • - advice is not only needed on the adoption of new technologies, but also on many other decisions farmers have to make, such as the choice of their farming system and the decision whether or not to earn an income from outside agriculture,

  • - this requires a change in extension methods and in the information sources extension agents use,

  • - agricultural development demands painful changes in the way of farming and of living for many farm families. It is a challenge for extension agencies to help farm families to realise this,

  • - a major task for leaders of extension organisations is to manage a process of change in agricultural extension. Often the role extension has to play in agricultural development can not be performed by one extension organisation, but only by a pluralistic extension system.

Agricultural extension is often expected to contribute to a reduction of poverty among farmers and farm labourers. One has to think seriously how one can realise this objective.  相似文献   
32.
Book review     

Miteinander Reden: Kommunikationspsychologie für Führungskräfte (Talking with another: Communication psychology for leaders). by F. Schulz von Thun, J. Ruppel and R. Stratmann (2000), Reinbek, RoRoRo Sachbuch 60687, ISBN 3 499 60687 9, DM 16.90.  相似文献   
33.
34.
ABSTRACT

Using classical and quantile regression analyses, we investigated whether predictor variables for early reading comprehension differed depending on language background and ability level in a mixed group of 161 monolingual (L1) and bilingual (L2) children in second grade (6–8 years). Although L2 readers scored lower on oral language skills and reading comprehension, the prediction of reading comprehension was similar for L1 and L2 readers. Classical regression identified decoding, vocabulary, and morphosyntactic knowledge as unique predictors with no interaction with language background. Quantile regression demonstrated that the prediction of reading comprehension differed across ability levels; decoding and morphosyntactic knowledge were consistently unique predictors, but vocabulary was uniquely related only for poor comprehenders and working memory only for good comprehenders. In both types of analysis, language background did not explain unique variance, indicating that individual differences in the predictor variables explained the L1–L2 performance gap in early reading comprehension across the ability range.  相似文献   
35.
Many studies have demonstrated the efficacy of reading comprehension interventions for struggling readers, including students with learning disabilities. Yet, some readers continue to struggle with comprehension despite receiving these interventions. In this article, we argue that an explicit link between cognitive psychology and intervention research contributes to knowledge regarding for whom and under what conditions reading comprehension interventions are most likely to be beneficial. First, we provide a brief overview of a cognitive perspective on reading comprehension. Next, we illustrate an application of this perspective by describing a collaborative project in which we examined interactions among reader characteristics, text properties, and instructional contexts. Last, we highlight directions for future research and implications for practice.  相似文献   
36.
It is argued that Pettit’s conception of “contestatory democracy” is superior to deliberative, direct and epistemic democracy. The strong and weak points of these conceptions are discussed drawing upon the work of a.o Bruce Bimber. It is further argued that ‘contestation’ and ‘information’ are highly relevant notions in thinking about, just, viable and sustainable design for E-democracy. *A version of this paper was presented at Ethicomp 2002, Lisbon.  相似文献   
37.
The so-called leaking STEM pipeline (dropout in STEM education) has been the subject of many studies. The large interest of scholars in plausible causes of this leakage has resulted in a number of meta-reviews describing factors at system, school and student level related to interest and persistence in STEM education. The STEM pipeline discussion has also resulted in a large number of programmes aimed at enhancing STEM interest and persistence in STEM education. Although these programmes have been widely evaluated, there seems to be no consensus about which interventions are successful in raising interest in STEM or persistence in STEM education. This study reports the results of a systematic review of empirical studies in which the effectiveness of STEM-related interventions are assessed. Initially, 538 studies were found. The quality analyses showed that only a few of these evaluation studies are designed in such a way that it is likely that the found effects are caused by the intervention. Although some potentially effective interventions were found, this review shows that there is still a need for research into the effectiveness of those programmes, especially with regard to programmes preventing talented and initially motivated STEM students to drop out of STEM education.  相似文献   
38.
An 11-parameter Markov model of stages of learning, which was developed by Brainerd et al., will be presented. The focus will be on parameter interpretation in terms of long-term memory (LTM) processes. Next the model will be used to examine the contribution of these various LTM processes to Schooltype and Age differences in a word-pair memorization experiment. Subjects were 8 and 11-year-old normal-achieving (NA) children from regular elementary schools and 8 and 11-year-old children from special schools for learning disabled (LD) children. One of the main conclusions is that the Schooltype × Age interaction which was demonstrated for traditional performance measures, can be explained by LD children's little developmental progress in storage processes and deviations from normal development in aspects of the acquisition of retrieval algorithms. No deficiences were, however, detected in the LD children's rerention ability early in the task, and in the so-called heuristic retrieval operations.  相似文献   
39.
Science & Education - This paper discusses the potential of the creation and analysis of historical networks as didactic strategies in science education. To this end, we first argue the...  相似文献   
40.
ABSTRACT

Background

While open-cohort blended education programmes allow for accessible and flexible study trajectories, they may present social challenges to learners. Social presence is a possible a way of enhancing adult learners’ success. It can lead to an increased perception of community, which may result in lower rates of dropping out.  相似文献   
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