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《Journal of Informetrics》2014,8(1):98-110
Dynamic development is an intrinsic characteristic of research topics. To study this, this paper proposes two sets of topic attributes to examine topic dynamic characteristics: topic continuity and topic popularity. Topic continuity comprises six attributes: steady, concentrating, diluting, sporadic, transforming, and emerging topics; topic popularity comprises three attributes: rising, declining, and fluctuating topics. These attributes are applied to a data set on library and information science publications during the past 11 years (2001–2011). Results show that topics on “web information retrieval”, “citation and bibliometrics”, “system and technology”, and “health science” have the highest average popularity; topics on “h-index”, “online communities”, “data preservation”, “social media”, and “web analysis” are increasingly becoming popular in library and information science. 相似文献
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本文以Scientometrics 1991—2010年间刊载的2,045篇论文作为数据样本,分两个时间段研究这20年间科学计量学的知识结构与演进状况,并以此来研究作者文献耦合分析法（ABCA）与作者关键词耦合分析法（AKCA）在揭示学科领域知识结构方面的异同。研究发现,2001—2010年间的科学计量学的知识结构要比1991—2000年间的更加清晰明朗,其研究主题之间更为亲密,相互作用力明显要强。作者排名相关分析、研究主题探测、余弦相似度计算、研究主题变迁等均显示,AKCA与ABCA存在高度相关性;通过因子分析的模型拟合、研究主题的探测与变迁分析,又显示二者略有不同,ABCA可以探寻到比AKCA更多的研究主题,AKCA比ABCA能显示更多的信号来反映学科的技术突破以及研究前沿的进展。因此ABCA与AKCA不可互相替代,二者结合起来是探寻学科知识结构及其发展的理想研究方法。图4。表6。参考文献25。 相似文献
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We present an engaging and practical exercise in which graduate students grapple with metatheoretical perspectives often presented in their introduction to graduate studies or communication theory courses. To expand their understanding of and engagement with the major elements of the paradigms central to our field, students work in groups to apply and compare various metatheoretical assumptions to a specific research context. The goal of this activity is to strengthen students’ grasp and understanding of these perspectives specifically in the role they hold in guiding one's research study and design. We provide various examples and directions to aid instructors in the presentation of this exercise, as such topics are often challenging from a pedagogical standpoint.
Courses: Communication Theory, Introduction to Graduate Studies.
Objectives: To aid students in grasping, understanding, and comparing the major elements of metatheoretical perspectives and assumptions through application to specific research contexts. 相似文献
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[目的/意义]基于时间网络影响力模型,研究微博话题的时变传播特性。[方法/过程]首先构建微博话题影响力网络模型,给出影响力网络的定义、关键因素分析、模型以及网络权值的计算方法,在此基础上,基于时间网络影响力模型研究微博话题时变传播特性,利用新浪微博平台及DATAMALL的最新微博话题数据仿真分析微博话题随时间的动态传播过程以及对用户的影响力强度。[结果/结论]微博话题随时间的动态传播过程以及对用户的影响力强度之仿真分析结果表明:约有93.3%的话题延迟在1-5小时以内,同时微博话题的影响力网络权值越高,相应的转发评论人数越多,微博话题的影响力也越大。最后将本文提出的TNIM模型与传统的影响力网络模型LDA进行对比,结果显示TNIM模型的影响力网络权值的准确性和稳定性都高于LDA模型,验证了TNIM模型的有效性。 相似文献
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Over the years, health sciences librarians have been change agents, leading the charge on issues of importance to the profession and the communities we serve. From its founding in 1898 with the Exchange, the Medical Library Association (MLA) has been dedicated to improving access to health information. In 2003, the Board of Directors published a statement supporting open access to information generated from federally funded scientific and medical research and maintained that having access to timely, relevant, and accurate information is vital to the health of the nation and its education and research programs. At some financial risk, the association made the Journal of the Medical Library Association (JMLA) open access and published the entire archive of JMLA and its predecessor, the Bulletin of the Medical Library Association, in PubMed Central. Nearly two decades later, the promise of open access and open science finally seems to be coming to fruition. In the 2020 Janet Doe Lecture, Chris Shaffer, AHIP, described the ways that MLA has led the profession, standing behind a shared vision and “walking the walk.” In challenging listeners to embrace open science, he affirmed that, as leaders in improving access to health sciences information since 1898, medical librarians must work in the open science arena to realize our vision “that quality information is essential for improved health.”Open in a separate windowChris Shaffer 相似文献
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Courses: This semester-long assignment can be featured in undergraduate or graduate communication courses that include a major writing assignment such as research methods, capstone classes, senior thesis sections, or advanced courses on topics such as interpersonal, intercultural, and interracial communication. This assignment is suitable for face-to-face, online, and blended courses.
Objectives: By completing this assignment, students should be able to (a) outline and draft a full research paper or comprehensive literature review on a course-related topic, (b) tailor their papers to meet the requirements of an editor’s call for papers, (c) peer review and provide constructive feedback on classmates’ scholarly papers, and (d) revise and resubmit their original research papers to a mock journal. 相似文献
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��[Purpose/significance] Through the fitting analysis of the citation curves of emerging technology topics, this paper refined and summarized the main types and characteristics of the citation curves, in order to provide a useful reference for the study of prediction methods for radical innovation topics at the micro level.[Method/process] Firstly, the hypothesis of using citation curves to trace the emerging technology topics to produce radical innovation was proposed and the concept and measurement method of the transition index were proposed. The criteria of predicting radical innovation were summarized and the method model of radical innovation identification was constructed from the two dimensions of knowledge transition and continuous growth. Then used the time slices cited data of each emerging technology topic to construct the citation curves, classify and summarize the types and characteristics of citation curves of different emerging technology topics.[Result/conclusion] The citation curves of emerging technology topics includes four types:continuous growth in the near future; continuous decline in the near future; short life cycle; consistent trends in similar years. According to the identification criteria of radical innovation, the citation curves have the potential to become radical innovation if they have many transitions and a large transition range, and the highest citation peak occurs later, and maintains a high citation rate in the near future with a sustained stable or rapid growth. Combined with the assessment of the prediction results by domain experts and the research progress of different emerging technology topics, it is verified that the citation curve fitting analysis can effectively predict the breakthrough of emerging technology topics. 相似文献
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Henk F. Moed 《Journal of Informetrics》2010,4(3):265-277
This paper explores a new indicator of journal citation impact, denoted as source normalized impact per paper (SNIP). It measures a journal's contextual citation impact, taking into account characteristics of its properly defined subject field, especially the frequency at which authors cite other papers in their reference lists, the rapidity of maturing of citation impact, and the extent to which a database used for the assessment covers the field's literature. It further develops Eugene Garfield's notions of a field's ‘citation potential’ defined as the average length of references lists in a field and determining the probability of being cited, and the need in fair performance assessments to correct for differences between subject fields. A journal's subject field is defined as the set of papers citing that journal. SNIP is defined as the ratio of the journal's citation count per paper and the citation potential in its subject field. It aims to allow direct comparison of sources in different subject fields. Citation potential is shown to vary not only between journal subject categories – groupings of journals sharing a research field – or disciplines (e.g., journals in mathematics, engineering and social sciences tend to have lower values than titles in life sciences), but also between journals within the same subject category. For instance, basic journals tend to show higher citation potentials than applied or clinical journals, and journals covering emerging topics higher than periodicals in classical subjects or more general journals. SNIP corrects for such differences. Its strengths and limitations are critically discussed, and suggestions are made for further research. All empirical results are derived from Elsevier's Scopus. 相似文献
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《Journal of Informetrics》2023,17(3):101425
Rousseau and Mutz argued that the existing researches on diversity measure methods, such as the Rao-Stirling index, DIV, etc., have shortcomings, and urged colleagues to find a better framework for diversity measure. Based on Shannon entropy and entropy of degree vector sum, in this contribution a new diversity measure EDVS (Entropy of Degree Vectors Sum) is proposed, which meets all requirements of variety, balance and disparity, and can directly calculate the value of diversity from the observed sample data without calculating the joint probability distribution of two random variables, or mutual information. The empirical results show that: (1) the ranking of the EDVS measure has a higher Spearman correlation coefficient with DIV and DIV* than with Shannon entropy. (2) The EDVS ranking is more relevant with DIV* than with DIV. (3) The diversity of soft science journals is higher than that of hard science journals, which indicates that the interdisciplinary research of social sciences and humanities is more common than that of hard sciences such as sciences and engineering sciences. (4) Rao-Stirling index and DIV index are more sensitive to sample size. The computational complexity of the Rao-Stirling index and DIV index is , while the computational complexity of the EDVS index is . This provides the feasibility for analyzing high-dimension networks and large data sets. Results of verification on different types of data sets show that EDVS can not only effectively measure the diversity of disciplines in interdisciplinary research, but also effectively measure the diversity of other entities. 相似文献
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In the Essential Science Indicators (Thomson Reuters), a research front exists to the h index (entitled “GOOGLE SCHOLAR H-INDEX; SCIENCE CITATION INDEX; GENERALIZED HIRSCH H-INDEX; H INDEX; GOOGLE SCHOLAR CITATIONS”) consisting of a group of highly cited papers. We used HistCite to analyze the structure and relationships of the 45 papers forming the h index research front. Since we were interested in the topics of research on the h index at the front, we classified each paper according to its main topic. Six topics (inductively generated) were sufficient to classify the 45 papers: (1) citation database, (2) empirical validation study, (3) new application, (4) theoretical analysis, (5) new index development, and (6) literature review. 相似文献
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Course: This activity is intended for a course on romantic relationships, communication between intimate partners, or a special topics class where partner communication about sex may be discussed.
Objective: The objective is to provide students a non-threatening environment to articulate their conceptualization of sexual pleasure, and to practice communication about sexual pleasure and preferences. Students will also examine challenges and opportunities for communication about sexual pleasure. 相似文献
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图书馆学情报学中的电子政务研究 总被引：1，自引：0，他引：1
为探索电子政务研究与图书馆学情报学的关系,调查我国图书馆学情报学专业硕士与博士培养单位电子政务相关研究方向的设置情况,并对我国图书馆学情报学核心期刊中电子政务的相关论文进行文献计量分析。主要分析论文的作者和机构、基金资助、研究热点与主题分布情况,发现电子政务是图书馆学情报学的重要研究领域。目前,作为交叉学科领域的电子政务研究主题正呈现出学科分化的趋势;今后,图书馆学情报学专业的电子政务研究应当更加聚焦于本专业的核心研究课题。 相似文献
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Richard J. Cox 《International Information and Library Review》2013,45(3):195-231
AbstractThere has been little systematic research about the image of archivists and archives. This study considers how this topic has been handled in an eight month span of The New York Times from late 1992 to mid 1993. While the news media’s coverage is present, it is clear that archives are treated as curiosities or when they relate to political disputes, are associated with prominent figures, or have interesting or different views to offer on important topics. 相似文献
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ABSTRACTThis article explores rapid review and evidence mapping methodology to map library literature on the presence of, status of, or support for African American academic librarians. Rapid reviews include transparent steps and are completed in a short time frame. Evidence mapping is emerging as a way to summarize evidence. A chronological map indicated topics and impacts of papers. Additional analysis also showed four broad themes: diversity, recruitment, retention, and racism. In our view, rapid review and evidence mapping methods should be considered by academic librarians. Further research should look at racism that still seems apparent in academic libraries. 相似文献
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This study examined views on the practice of account planning among advertising professionals in India. Three research questions were proposed to investigate perceptions of planning's growth in this emerging global hotspot, practitioner beliefs about planning, as well as opinions of coercive, mimetic and normative pressures in its development. A cross-sectional survey (n=154) across all key agency areas was conducted. Results indicate that (1) planning is seen as a growing practice in Indian advertising, (2) overall beliefs about account planning are highly positive, and (3) environmental (external) pressures impact planning in India though not all are considered equally important. Future research directions are proposed. 相似文献
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This introduction to the special issue summarizes and contextualizes six novel research contributions at the intersection of information retrieval (IR) and crowdsourcing (also overlapping crowdsourcing’s closely-related sibling, human computation). Several of the papers included in this special issue represent deeper investigations into research topics for which earlier stages of the authors’ research were disseminated at crowdsourcing workshops at SIGIR and WSDM conferences, as well as at the NIST TREC conference. Since the first proposed use of crowdsourcing for IR in 2008, interest in this area has quickly accelerated and led to three workshops, an ongoing NIST TREC track, and a great variety of published papers, talks, and tutorials. We briefly summarize the area in order to help situate the contributions appearing in this special issue. We also discuss some broader current trends and issues in crowdsourcing which bear upon its use in IR and other fields. 相似文献