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1.
Modeling a century of citation distributions 总被引：1，自引：1，他引：0
The prevalence of uncited papers or of highly cited papers, with respect to the bulk of publications, provides important clues as to the dynamics of scientific research. Using 25 million papers and 600 million references from the Web of Science over the 1900–2006 period, this paper proposes a simple model based on a random selection process to explain the “uncitedness” phenomenon and its decline over the years. We show that the proportion of cited papers is a function of (1) the number of articles available (the competing papers), (2) the number of citing papers and (3) the number of references they contain. Using uncitedness as a departure point, we demonstrate the utility of the stretched-exponential function and a form of the Tsallis q-exponential function to fit complete citation distributions over the 20th century. As opposed to simple power-law fits, for instance, both these approaches are shown to be empirically well-grounded and robust enough to better understand citation dynamics at the aggregate level. On the basis of these models, we provide quantitative evidence and provisional explanations for an important shift in citation practices around 1960. We also propose a revision of the “citation classic” category as a set of articles which is clearly distinguishable from the rest of the field. 相似文献
2.
Jan van Aalst Fung Wai Hing Li Siu May Wong Pui Yan 《Library & information science research》2007,29(4):533-552
Current curriculum reforms in Hong Kong emphasize learning how to learn and project-based learning. The most recent reform introduces “Liberal Studies” as a mandatory school subject in senior secondary school. This article reports on an exploratory case study of the information searching process (ISP) among Form 6 (Grade 12) students in a Liberal Studies course. Researchers examined sources of information used by students, students' cognitive and emotional experience during the ISP, and communication within the collaborative groups. Findings indicated that Internet-based sources were predominant but that most students had difficulty completing the ISP. Work is needed to help students develop a theory of knowledge in which the meaning of information is contextual and the process of interpreting information requires effort. Such work is important if collaborative inquiry projects in Liberal Studies courses are to lead to deep learning. 相似文献
3.
Robin Camille Davis 《Behavioral & Social Sciences Librarian》2013,32(3):128-134
ABSTRACTCiting webpages has been a common practice in scholarly publications for nearly two decades as the Web evolved into a major information source. But over the years, more and more bibliographies have suffered from “reference rot”: Cited URLs are broken links or point to a page that no longer contains the content the author originally cited. In this column, I look at several studies showing how reference rot has affected different academic disciplines. I also examine citation styles’ approach to citing Web sources. I then turn to emerging Web citation practices: Perma, a “freemium” Web archiving service specifically for citation; and the Internet Archive, the largest Web archive. 相似文献
4.
《图书馆管理杂志》2013,53(3-4):351-378
Summary The objective of this article is to examine some of the valuable philosophical resources available on the Internet, especially for librarians who need to determine what resources to provide to faculty, students, and staff. Some main uses of the Internet for philosophical research are: accessing texts, using search strategies to examine the texts, reading and writing electronic journal articles, accessing information from encyclopedias and dictionaries, browsing through paths of interlinked Web sites, searching the Internet for sources, and participating in online discussion forums. This article examines the Internet as a source of primary and secondary texts, journal literature, research databases, reference works, specialized limited area search engines, organizational information, and discussion lists. The article ends with a philosophical reflection on the transformative effect of information technology on the growth of knowledge. 相似文献
5.
Placing the Internet in information source horizons. A study of information seeking by Internet users in the context of self-development 总被引：1，自引：0，他引：1
The ways in which people perceive the relative value of the Internet when seeking information for self-development purposes were investigated. The concept of information source horizon was introduced, and it is a construct that enables one to put various information sources and channels in an order of preference to meet the requirements of information seeking. The horizon is based on one's conceptions of the characteristics of information sources, particularly their accessibility and quality. The study draws on interviews with eighteen Internet users who positioned various information sources in three zones of relevance. In their information source horizons, human sources such as friends and colleagues were preferred, followed by print media such as newspapers and books: networked sources were ranked third among six source types. Networked sources were favored for easy accessibility and opportunities to save time. The issue of “facilitating everyday life” was emphasized in this context. Also currency, broad repertoire of networked information, and the potential of the Internet to complement other services were valued highly. Critical stands on the Internet were mainly affected by the negative experiences of encountering low quality material. 相似文献
6.
The general aim of this paper is to show the results of a study in which we combined bibliometric mapping and citation network analysis to investigate the process of creation and transfer of knowledge through scientific publications. The novelty of this approach is the combination of both methods. In this case we analyzed the citations to a very influential paper published in 1990 that contains, for the first time, the term Absorptive Capacity. A bibliometric map identified the terms and the theories associated with the term while two techniques from the citation network analysis recognized the main papers during 15 years. As a result we identified the articles that influenced the research for some time and linked them into a research tradition that can be considered the backbone of the “Absorptive Capacity Field”. 相似文献
7.
《图书馆管理杂志》2013,53(3-4):271-292
Summary As society has come to equate economic prosperity with the health of our living resources, national science policy has called for the development of a comprehensive digital knowledge base to support informed decision making and wise resource management. The Internet and World Wide Web demonstrate the earliest stages of this evolving virtual library of the natural world, offering an increasing array of high-quality, innovative resources and services in the natural science arena. This article discusses the leading providers of natural science information on the Internet and highlights some of the exemplary resources they are delivering online. The discussion concludes with a brief discussion of the role of the librarian in developing the Web of natural science knowledge online and provides a short Webliography of starting points for further exploration of this subject area. 相似文献
8.
An attempt is made in this paper to gain an understanding of the current and potential impact of the new information and communication technologies (ICTs) on the Small Island Sates of the Caribbean, in particular those populations living in rural communities. The introduction briefly examines the impact of ICTs on society and calls for alternative channels for government to serve rural communities through the use of Multi-Community Access Centres (MCACs) or information kiosks available at libraries, police stations, tourist information centres and post offices, as an e-governance initiative in the creation of “smart communities” and as a grassroots effort. No analysis of ICTs on government's functions would be complete if we did not address the growing debate on the digital divide. In this paper a section is devoted to this and it summarily addresses the growing divide between the developed and the developing world and the potential of these islands to leap–frog barriers to information flows and access. The heart of the paper examines the impact of the Internet on small island economies and the growing use of the Internet in key sectors of each economy. Since this paper is about governments’ use of ICTs to transfer business transactions onto the Internet to service their populace, some discussion is undertaken and considers ways in which innovation has impacted on governments’ services and the early attempts by some Caribbean administrations to implement e-governance. E-Voices illustrates how certain government measures affect some vulnerable groups in society and ways in which they can broker power to participate in the process. Some key policy directions are proposed for Caribbean states and other developing countries to pursue. 相似文献
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Using 17 open-access journals published without interruption between 2000 and 2004 in the field of library and information science, this study compares the pattern of cited/citing hyperlinked references of Web-based scholarly electronic articles under various citation ranges in terms of language, file format, source and top-level domain. While the patterns of cited references were manually examined by counting the live hyperlinked-cited references, the patterns of citing references were examined by using the cited by tag in Google Scholar. The analysis indicates that although language, top-level domain, and file format of citations did not differ significantly for articles under different citation ranges, sources of citation differed significantly for articles in different citation ranges. Articles with fewer citations mostly cite less-scholarly sources such as Web pages, whereas articles with a higher number of citations mostly cite scholarly sources such as journal articles, etc. The findings suggest that 8 out of 17 OA journals in LIS have significant research impact in the scholarly communication process. 相似文献
12.
Erik SANDEWALL 《Learned Publishing》2008,21(2):123-131
The concept of a ‘publication’ no longer applies only to printed works; information technology has extended its application to several other types of works. This article describes a facility called the Common Knowledge Library that publishes modules of formally structured information representing facts and knowledge of various kinds. Publications of this new type have some characteristics in common with databases, and others in common with software modules; however, they also share some important characteristics with traditional publications. A framework for citation of previous work is important in order to provide an incentive for contributors of such modules. Peer review – the traditional method of quality assurance for scientific articles – must also be applied, although in a modified form, for fact and knowledge modules. The construction of the Common Knowledge Library is a cumulative process; new contributions are obtained by interpreting the contents of existing knowledge sources on the Internet, and the existing contents of the Library are an important resource for that interpretation process. 相似文献
13.
Gatekeepers usually control news information. However, recent technological advancements might require rethinking previous gatekeeping hierarchies. Aggregation algorithms currently filter and present news information to millions of American Internet users daily. A content analysis demonstrates significant differences between health news content retrieved from Web sites that aggregate their articles from many sources (e.g., Google News), and those that focus on providing news from a limited number of sources (e.g., CNN.com). Explanations for these content differences are discussed, as are implications concerning health information seeking and Internet news consumption. 相似文献
14.
The U.S. patent system and the body of issued patents are key elements in meeting information needs related to technology and innovation. Most librarians, however, have little understanding of the value of patents as sources of technological information—and less knowledge about how to help users tap what has been called, “the largest and most comprehensive body of technological literature in the world.” This article attempts to provide a sufficient background on patent fundamentals to allow librarians to assist or refer users who would benefit by the use of patents. Detailed patent searching instructions are provided for staff in Government Printing Office depository libraries to use materials available through the depository program. The value of utilizing one of the 58 Patent depository libraries to enhance and expedite the search process is highlighted, and online searching options are introduced. 相似文献
15.
Analysis of the urban/rural broadband divide in Canada: Using GIS in planning terrestrial wireless deployment 总被引：3，自引：0，他引：3
M. Sawada Daniel Cossette Barry Wellar Tolga Kurt 《Government Information Quarterly》2006,23(3-4):454
Millions of Canadians residing in Canada's northern, isolated, rural, and remote communities do not have broadband Internet access. This situation has led to a national “broadband divide.” That is, the deployment of wireline broadband is very limited in Canada's northern, isolated, rural, and remote areas because of the significant expense of installation and maintenance of the wired infrastructure needed to reach dwellings in these locations.Terrestrial broadband wireless technology, on the other hand, does not entail the same kind of physical infrastructure. As a result, there are dramatic changes in how spatial considerations affect the provision of broadband Internet services (BIS) to areas beyond the urban zone. In particular, the spatial question is now focused on assessing the capacity for different technological solutions to reach profitable population bases, and brings to the forefront organizations that are developing non-line-of-sight (NLOS) technologies that would permit wireless Internet access over much greater distances than current solutions.We begin this paper by establishing the importance of broadband connectivity to Canada's northern, isolated, rural, and remote communities. This discussion comments on the role of the Government of Canada in the provision of broadband connectivity to residents of these communities, and outlines the current regulatory issues that govern wireless services and policy formulation.The second part of the paper illustrates the use of geographic information system (GIS) approaches in the study of wireless broadband planning and deployment. Case study findings suggest that GIS applications can make a significant contribution to the analysis of wireless deployment planning, to the understanding of the relationships between wireless signal sources and consumers, and to the spatial configuration of terrestrial wireless broadband networks. We conclude the paper by discussing how the GIS approach employed could be used to inform the public policy process with regard to increasing access to broadband Internet services in all regions of the country, and thereby providing the opportunity for all Canadians, regardless of location, to fully participate in the Information Society. 相似文献
16.
《图书馆管理杂志》2013,53(1-2):63-73
Abstract Access to biological information on the World Wide Web continues to grow at a rapid pace. Many resources that previously required a trip to the library are now accessible from the desktop PC. Three major categories of biology Web sites are explored: those with citation information, those functioning as clearinghouses or directories to other Web sites, and those that present biological information in innovative ways. The suggested Web sites are some of the best and may serve as models for future Web development. Many useful citation Web sites are fee-based and are likely to continue as such for the near future; MEDLINE and AGRICOLA are important exceptions. Many significant clearinghouse and information Web sites are not fee-based and allow innovative ways of finding and sharing information. The state of research information on the WWW is not developed enough for the researcher to forego using paper sources. 相似文献
17.
It is no longer effective to provide information literacy instruction that is thought to be “good for” college students, but rather, instruction must focus on the learning styles and preferences of the target population. This case study reports a series of hands-on/minds-on information literacy activities that dissolve student's misconception that “techno-savvy” is synonymous with information literate. Careful and thorough instruction in the mining of popular Internet search engines for authoritative information was coupled with instruction in the use of traditional library resources. It was found that the college students studied possess a high need for clarity and a low tolerance for ambiguity, and therefore any activities assigned must be thoroughly, yet succinctly, described in order to achieve success. Combining traditional information literacy instruction with novel approaches appeals to the confidence in and reliance on Internet search engines that college students exhibit, while it moves this microcosm toward a higher level of information literacy and commitment to life long learning. 相似文献
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《图书馆管理杂志》2013,53(2-3):87-95
Abstract This article considers the use of filtering software (“censor-ware”) and the World Wide Web. It argues that the United States government, religious groups, and corporations should not deter freedom of speech and access to information in libraries. The article describes how governments and religious groups try to prevent Web sites from reaching Internet users, and explains how corporations sell and use filters for their own benefit. It also introduces organizations that rate Web sites as an alternative to electric filters, and presents people and groups that oppose filtering. In conclusion, it supports the idea that librarians and information professionals can educate Internet users without the interference of external entities and censorship. 相似文献
20.
《Library & information science research》2005,27(2):222-248
Searching for information pervades a wide spectrum of human activity, including learning and problem solving. With recent changes in the amount of information available and the variety of means of retrieval, there is even more need to understand why some searchers are more successful than others. This study was undertaken to advance the understanding of expertise in seeking information on the Web by identifying strategies and attributes that will increase the chance of a successful search on the Web. The strategies were as follows: evaluation, navigation, affect, metacognition, cognition, and prior knowledge, and attributes included age, sex, years of experience, computer knowledge, and info-seeking knowledge. Success was defined as finding a target topic within 30 minutes. Participants were from three groups. Novices were 10 undergraduate pre-service teachers, intermediates were 9 final-year master of library and information studies students, and experts were 10 highly experienced professional librarians working in a variety of settings. Participants' verbal protocols were transcribed verbatim into a text file and coded. These codes, along with Internet temporary files, a background questionnaire, and a post-task interview were the sources of the data. Since the variable of interest was the time to finding the topic, in addition to ANOVA and Pearson correlation, survival analysis was used to explore the data. The most significant differences in patterns of search between novices and experts were found in the cognitive, metacognitive, and prior knowledge strategies. Survival analysis revealed specific actions associated with success in Web searching: (1) using clear criteria to evaluate sites, (2) not excessively navigating, (3) reflecting on strategies and monitoring progress, (4) having background knowledge about information seeking, and (5) approaching the search with a positive attitude. 相似文献