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   75篇
  免费   0篇
教育   52篇
科学研究   9篇
各国文化   1篇
体育   3篇
文化理论   4篇
信息传播   6篇
  2023年   3篇
  2022年   2篇
  2021年   2篇
  2020年   3篇
  2019年   4篇
  2018年   5篇
  2017年   4篇
  2016年   4篇
  2015年   3篇
  2014年   7篇
  2013年   15篇
  2012年   5篇
  2011年   1篇
  2010年   4篇
  2009年   1篇
  2008年   2篇
  2007年   3篇
  2004年   2篇
  2001年   1篇
  1992年   1篇
  1987年   1篇
  1983年   1篇
  1976年   1篇
排序方式: 共有75条查询结果,搜索用时 15 毫秒
51.
The Library of Congress’ Cataloging in Publication (CIP) Program has been in existence for forty years. During this time, the CIP Program has moved from a model where the Library of Congress created all pre-publication metadata for publishers to a partnership where other libraries share in the creation of metadata. This article documents the evolution of the Electronic Cataloging in Publication (ECIP) Cataloging Partnership Program. The ECIP Cataloging Partnership Program can be used as a model to leverage limited resources across libraries to the benefit of library users nationwide.  相似文献   
52.
Abstract

The Electronic Cataloging in Publication (ECIP) Cataloging Partnership Program began in 2004. It is a collaboration between the Library of Congress (LC) Cataloging in Publication (CIP) Program, publishers, and libraries across the United States. System set-up for the program proved challenging for library partners. A survey was conducted during February 8–March 6, 2018 to learn about ECIP partners’ ECIP set-up experience. The findings show that communication and training documentation are two key elements for the program to be effective and successful. The survey results helped the LC CIP program develop a new and improved ECIP system.  相似文献   
53.
Some educational courses for adults are concerned with developing general cognitive skills and flexibility, rather than specific concepts and competencies. Examples of such courses are those involving the encouragement of creativity, flexible and clear thinking, and efficient reading. These cognitive development courses are difficult to evaluate; for it is not immediately clear whether adult students learn anything from the novel activities experienced in them. It is necessary to examine learning of this kind using appropriate psychological tests, so as to assess student's thinking in terms of its creativity and complexity. A study was undertaken of six adult education courses, including in particular four creativity‐training courses, with two other university groups serving as controls. With the adult education groups, several significant improvements in test results were gained following the six‐week courses, involving the student's production of ideas, preference for complex stimuli, and creative independence. Consequently, creativity‐training and similar courses for general cognitive development are recommended for inclusion in both professional and lay adult‐education courses.  相似文献   
54.
Introductory thermodynamics is a topic which is covered in a wide variety of science and engineering educations. However, very different teaching traditions have evolved within different scientific specialties. In this study we examine three courses in introductory thermodynamics within three different scientific specialties: physics, chemical engineering and mechanical engineering. Based on a generalization of Kuhn’s theory of disciplinary matrix, and the idea of boundary objects we analyse how basic thermodynamics theory is conceived in the different scientific specialties. The study is based on interviews with teachers and analysis of the different textbook traditions. It is concluded that teachers need to take into account how subject matter is conceived in other related scientific specialties when designing courses. Two examples demonstrating how this may be done are given.
Camilla RumpEmail:
  相似文献   
55.
56.
Examination of assessment practices in 54 model programs for early education of handicapped children revealed extreme variability. Only 19 tests were used by at least five programs; only one device was used by over half of the responding programs. Most tests were listed as being used for more than one purpose, but some tests appeared to be used more exclusively than others for a particular purpose. Although the technical adequacy, in terms of norms, validit, and reliability, was reportedly an important factor influencing selection and continued use of tests, analysis of the 19 most commonly used devices revealed that only three were technically adequate. Other methods of assessment also were examined. Implications for model practice are discussed.  相似文献   
57.
This work presents the development of an array of bioreactors where finely controlled stirring is provided at the microliter scale (100–300 μl). The microliter-bioreactor array is useful for performing protocol optimization in up to 96 parallel experiments of hematopoietic stem cell (HSC) cultures. Exploring a wide range of experimental conditions at the microliter scale minimizes cost and labor. Once the cell culture protocol is optimized, it can be applied to large-scale bioreactors for stem cell production at the clinical level. The controlled stirring inside the wells of a standard 96-well plate is provided by buoyancy-driven thermoconvection. The temperature and velocity fields within the culture volume are determined with numerical simulations. The numerical results are verified with experimental velocity measurements using microparticle image velocimetry (μPIV) and are used to define feasible experimental conditions for stem cell cultures. To test the bioreactor array’s functionality, human umbilical cord blood-derived CD34+ cells were cultured for 7 days at five different stirring conditions (0.24–0.58 μm∕s) in six repeated experiments. Cells were characterized in terms of proliferation, and flow cytometry measurements of viability and CD34 expression. The microliter-bioreactor array demonstrates its ability to support HSC cultures under stirred conditions without adversely affecting the cell behavior. Because of the highly controlled operative conditions, it can be used to explore culture conditions where the mass transport of endogenous and exogenous growth factors is selectively enhanced, and cell suspension provided. While the bioreactor array was developed for culturing HSCs, its application can be extended to other cell types.  相似文献   
58.
The current study provided an investigation of 110 faculty who were very involved, moderately involved, and not involved in governance activities in community colleges. No differences were found between the three groups on characteristics of an ideal governance process or the roles faculty have in shared governance. Differences were found in responses to general perceptions toward faculty involvement in governance.  相似文献   
59.
60.
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