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排序方式: 共有874条查询结果,搜索用时 15 毫秒
81.
AbstractThe Program for Cooperative Cataloging (PCC) has formal relationships with the Library of Congress (LC), Share-VDE, and Linked Data for Production Phase 2 (LD4P2) for work on Bibliographic Framework (BIBFRAME), and PCC institutions have been very active in the exploration of MARC to BIBFRAME conversion processes. This article will review the involvement of PCC in the development of BIBFRAME and examine the work of LC, Share-VDE, and LD4P2 on MARC to BIBFRAME conversion. It will conclude with a discussion of areas for further exploration by the PCC leading up to the creation of PCC conversion specifications and PCC BIBFRAME data. 相似文献
82.
论西部地区产业结构的成因与升级转换 总被引:2,自引:0,他引:2
西部地区产业结构整体上呈现出低下和畸型化发展倾向,其根本原因在于,受凝滞的公有产权的制度约束,在产业结构的形成过程中,人为构建成分大于自然演进成分,破坏了产业结构内在生成的一般规律。因此,转换西部地区的产业结构要特别注重产业结构升级、演进的自然规律,以及政府在其中的角色定位。在产业结构升级与转换过程中,要选择正确的产业结构转换路径,并以适当的对策措施加以推进。 相似文献
83.
This study details the development and results of a campus-based writing assessment plan that was mandated by a state-wide university system in order to explore the “value-added” from a writing program curriculum to undergraduate students’ competence with written expression. Four writing samples (two timed essays and two conventional essays) that are produced before, during and at the close of enrollment in the writing program are scored for critical thinking, genre knowledge, rhetorical skills, and mechanics. The results indicate that local campus student achievement related to writing is comparable with performance captured by nationally normed technologies and larger assessment projects at similar state universities. The data also suggest significant performance difference related to the institutional position of students’ instructors as well as students’ own enrollment status. The article concludes that while the data produced by this research project are compelling, the policy and political implications of the undertaking suggest greater sensitivity to the institution's culture and program direction as well as its impact on instructor morale, student learning environment and the place of composition studies in the university. 相似文献
84.
Puay Tang 《Research Policy》2005,34(6):852-871
This exploratory article sets out to examine if and how the new digital copyright laws in the U.S. and Europe are affecting innovation on the Internet. It argues that these laws, in balance, at least to date, are having a positive effect on Internet innovation, despite the strident argument that these laws will inhibit innovation. The innovations the article discusses are peer-to-peer (P2P) file sharing technology and the new business models for music retailing that P2P has spawned. It concludes that digital copyright laws could create perverse incentives for innovation and wonders if legislators may not require a better understanding of the innovation process when crafting IP laws. 相似文献
85.
詹速汉 《韩山师范学院学报》1997,18(2):62-71
本文介绍一个功能较齐全、实用性强的陶瓷制品行业管理信息系统,对各子系统的主要功能作介绍,并给出数据库设计和程序设计的方法技巧。 相似文献
86.
87.
潘建新 《湖州师范学院学报》1990,(6)
本文就dBASEⅢ程序锯齿形格式的自动生成问题进行了探讨,着重介绍了作者研制并在BASIC下实现的锯齿形格式的自动生成工具PJX.给出了PJX工具的基本结构与实现方法. 相似文献
88.
89.
Elena C. Papanastasiou Michalinos Zembylas Charalambos Vrasidas 《Journal of Science Education and Technology》2003,12(3):325-332
A surprising result of the Third International Mathematics and Science Study (TIMSS) is that computer use was negatively associated with high student achievement in some countries. More specifically, the students from all three countries who indicated that they use computers in the classroom most frequently were those with the lowest achievement on the TIMSS in 1995. For the purpose of this study, a similar comparison was made for 15-year-old U.S.A. students, based on the data from the Program for International Student Assessment (PISA). The results of this study show that it is not computer use itself that has a positive or negative effect on the science achievement of students, but the way in which computers are used. For example, after controlling for the student's socioeconomic status in the United States of America, the results indicated that the students who used computers frequently at home, including for the purpose of writing papers, tended to have higher science achievement. However, the results of this study also show that science achievement was negatively related to the use of certain types of educational software. This indicates a result similar to that found in the TIMSS data, which might reflect the fact that teachers assign the use of the computer and of educational software to the lower achieving students more frequently, so that these students can obtain more personal and direct feedback through educational software. 相似文献
90.
该文介绍了以太网与FC网组成的双网结构的电视多媒体制作播出数字网络的一种构思 ,并且针对其主要功能作出说明 相似文献