全文获取类型
收费全文 | 1658篇 |
免费 | 27篇 |
国内免费 | 1篇 |
专业分类
教育 | 1411篇 |
科学研究 | 14篇 |
各国文化 | 27篇 |
体育 | 34篇 |
文化理论 | 9篇 |
信息传播 | 191篇 |
出版年
2023年 | 6篇 |
2022年 | 6篇 |
2021年 | 11篇 |
2020年 | 22篇 |
2019年 | 28篇 |
2018年 | 48篇 |
2017年 | 57篇 |
2016年 | 50篇 |
2015年 | 43篇 |
2014年 | 51篇 |
2013年 | 365篇 |
2012年 | 63篇 |
2011年 | 46篇 |
2010年 | 37篇 |
2009年 | 41篇 |
2008年 | 40篇 |
2007年 | 39篇 |
2006年 | 39篇 |
2005年 | 34篇 |
2004年 | 53篇 |
2003年 | 37篇 |
2002年 | 42篇 |
2001年 | 46篇 |
2000年 | 27篇 |
1999年 | 23篇 |
1998年 | 15篇 |
1997年 | 14篇 |
1996年 | 11篇 |
1995年 | 21篇 |
1994年 | 31篇 |
1993年 | 28篇 |
1992年 | 15篇 |
1991年 | 16篇 |
1990年 | 28篇 |
1989年 | 16篇 |
1988年 | 14篇 |
1987年 | 18篇 |
1986年 | 18篇 |
1985年 | 16篇 |
1984年 | 19篇 |
1983年 | 17篇 |
1982年 | 14篇 |
1981年 | 13篇 |
1980年 | 14篇 |
1979年 | 22篇 |
1978年 | 17篇 |
1977年 | 13篇 |
1976年 | 12篇 |
1975年 | 9篇 |
1974年 | 7篇 |
排序方式: 共有1686条查询结果,搜索用时 15 毫秒
11.
12.
Amanda Maple Carol Wright Robert Seeds 《Library Collections, Acquisitions, and Technical Services》2004,27(4):425-442
The issue of format duplication in academic library collections is increasingly complicated and perplexing in an environment of static or dwindling resources, soaring user expectations, dynamic access models, and inconsistent and changing publisher and vendor pricing structures. The problem is further complicated for libraries serving a university with multiple campus locations. This paper surveys recent investigative projects and highlights the work of a Duplicate Formats Task Force at Pennsylvania State University charged with determining the extent and nature of format duplication at that institution. 相似文献
13.
E Diane Johnson Paul E Pancoast Joyce A Mitchell Chi-Ren Shyu 《Journal of the Medical Library Association》2004,92(4):438-444
PURPOSE: This study describes the system architecture and user acceptance of a suite of programs that deliver information about newly updated library resources to clinicians' personal digital assistants (PDAs). DESCRIPTION: Participants received headlines delivered to their PDAs alerting them to new books, National Guideline Clearinghouse guidelines, Cochrane Reviews, and National Institutes of Health (NIH) Clinical Alerts, as well as updated content in UpToDate, Harrison's Online, Scientific American Medicine, and Clinical Evidence. Participants could request additional information for any of the headlines, and the information was delivered via e-mail during their next synchronization. Participants completed a survey at the conclusion of the study to gauge their opinions about the service. RESULTS/OUTCOME: Of the 816 headlines delivered to the 16 study participants' PDAs during the project, Scientific American Medicine generated the highest proportion of headline requests at 35%. Most users of the PDA Alerts software reported that they learned about new medical developments sooner than they otherwise would have, and half reported that they learned about developments that they would not have heard about at all. While some users liked the PDA platform for receiving headlines, it seemed that a Web database that allowed tailored searches and alerts could be configured to satisfy both PDA-oriented and e-mail-oriented users. 相似文献
14.
15.
Michelle Caswell Joyce Gabiola Jimmy Zavala Gracen Brilmyer Marika Cifor 《Archival Science》2018,18(1):73-93
Although much has been written about formal archival spaces, little scholarship has addressed the physical spaces of community archives. This paper asks: How do community members imagine the physical spaces that steward identity-based community archives? Based on focus groups with more than 54 community archives users at five different community archives sites across Southern California, this paper examines how members of marginalized communities conceive of the physical space inhabited by community archives representing their communities. The sites explored range from a prominent location on a university campus, to storefronts, strip malls, and small cinderblock buildings. Yet across sites, users spoke about community archives spaces as symbolic and affectively moving locations. Many users described their community archives site as a “home-away-from-home,” marked by intergenerational dialog and a profound sense of belonging. For other users, community archives sites were described as “politically generative spaces” which foster dialog and debate about identity, representation, and activism and enable the community to envision its future. And yet, while the very existence of community archives is political, many participants felt that the full political potential of these sites is not yet realized. By listening to the voices of the communities represented and served by community archives, our research both indicates that a shift is warranted in archival metaphors of space and reveals how community archives are personally and politically transformative spaces for the communities they represent and serve. 相似文献
16.
17.
18.
Carol Reeves 《Technical Communication Quarterly》2015,24(4):328-348
In a scientific dispute over the effects of atrazine on amphibians, chemical industry–funded and publically funded scientists present stunningly contrasting constructions of atrazine's environmental concentrations, persistence, and potential to harm. Considerable scientific uncertainties and variable ranges allow authors to construct preferred versions of the story of atrazine. These incommensurate rhetorical constructions, more the result of competing economic and environmental interests than of any paradigmatic misalignments, have prolonged the dispute not only over atrazine's effects but also over whether its sales should be banned. 相似文献
19.
20.
Paul W. Grimes Joyce E. Nielsen James F. Niss 《The American journal of distance education》2013,27(2):36-43
Abstract Correspondence study represents the first and most persistent distance education format in American universities. Later called independent study, it enabled universities to disseminate instruction far beyond their campuses. Yet, national‐level leadership provided by the National University Continuing Education Association (NUEA) and its divisions has been relatively restrained. In contrast, leadership in the private correspondence school sector has been assertive, and sometimes even aggressive. The NUEA and its members shunned this approach, choosing instead to lead by persuasion and example. The NUEA developed standards of practice concerned primarily with replicating on‐campus teaching styles and values, rather than the promotion of distance education. With the abolition of its division structure, the NUEA's successor, the University Continuing Education Association (UCEA), has opted out of a leadership role in independent study. This paper concludes that the NUEA's initial attempt at leadership in distance education— while reasoned and principled—contained flaws that made failure inevitable. 相似文献