共查询到20条相似文献，搜索用时 46 毫秒
1.
《Journal of Informetrics》2019,13(3):817-829
The number of publications and the number of citations received have become the most common indicators of scholarly success. In this context, scientific writing increasingly plays an important role in scholars’ scientific careers. To understand the relationship between scientific writing and scientific impact, this paper selected 12 variables of linguistic complexity as a proxy for depicting scientific writing. We then analyzed these features from 36,400 full-text Biology articles and 1,797 full-text Psychology articles. These features were compared to the scientific impact of articles, grouped into high, medium, and low categories. The results suggested no practical significant relationship between linguistic complexity and citation strata in either discipline. This suggests that textual complexity plays little role in scientific impact in our data sets. 相似文献
2.
An assessment of social sciences coverage by four prominent full-text online aggregated journal packages 总被引：1，自引：0，他引：1
The cost effectiveness and quality of full-text journals are analyzed for four prominent online aggregated journal packages: EBSCOhost Academic Search FullTEXT, UMI Proquest Direct Periodicals Research II, IAC’s Expanded Academic ASAP, and H.W. Wilson’s OmniFile. Price data from EBSCO’s Librarians’ Handbook are used to assess the total and average value of social sciences journals in each package. Quality of social sciences journals coverage is compared based on citation impact factors as recorded in Journal Citation Reports—Social Sciences Edition. 相似文献
3.
[目的/意义] 为更好地提升基于内容的引文分析效果，对国内外引用对象相关研究进行调研总结，为引用内容分析研究提供借鉴。[方法/过程] 通过调研国内外引用对象相关研究，梳理引用对象的概念定义、分类体系、应用领域和自动化识别等方面研究进展，总结当前引用对象研究不足并提出未来发展方向。[结果/结论] 引用对象从语义层面评价文献学术研究的贡献和利用价值，为引文分析方法增加了重要维度。引用对象研究需要从理论、技术和应用三个方向进行深化：理论上，加强多维度引用对象特征的研究和分析；技术上，探索基于大规模语料的自动化识别方法；应用上，尝试基于引用对象的科研评价服务。 相似文献
4.
《Journal of Informetrics》2007,1(3):185-192
In this paper, we propose two methods for scoring scientific output based on statistical quantile plotting. First, a rescaling of journal impact factors for scoring scientific output on a macro level is proposed. It is based on normal quantile plotting which allows to transform impact data over several subject categories to a standardized distribution. This can be used in comparing scientific output of larger entities such as departments working in quite different areas of research. Next, as an alternative to the Hirsch index [Hirsch, J.E. (2005). An index to quantify an individuals scientific research output. Proceedings of the National Academy of Sciences of the United States of America, 102(46), 16569–16572], the extreme value index is proposed as an indicator for assessment of the research performance of individual scientists. In case of Lotkaian–Zipf–Pareto behaviour of citation counts of an individual, the extreme value index can be interpreted as the slope in a Pareto–Zipf quantile plot. This index, in contrast to the Hirsch index, is not influenced by the number of publications but stresses the decay of the statistical tail of citation counts. It appears to be much less sensitive to the science field than the Hirsch index. 相似文献
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6.
Yunrong Li Filippo Radicchi Claudio Castellano Javier Ruiz-Castillo 《Journal of Informetrics》2013,7(3):746-755
Wide differences in publication and citation practices make impossible the direct comparison of raw citation counts across scientific disciplines. Recent research has studied new and traditional normalization procedures aimed at suppressing as much as possible these disproportions in citation numbers among scientific domains. Using the recently introduced IDCP (Inequality due to Differences in Citation Practices) method, this paper rigorously tests the performance of six cited-side normalization procedures based on the Thomson Reuters classification system consisting of 172 sub-fields. We use six yearly datasets from 1980 to 2004, with widely varying citation windows from the publication year to May 2011. The main findings are the following three. Firstly, as observed in previous research, within each year the shapes of sub-field citation distributions are strikingly similar. This paves the way for several normalization procedures to perform reasonably well in reducing the effect on citation inequality of differences in citation practices. Secondly, independently of the year of publication and the length of the citation window, the effect of such differences represents about 13% of total citation inequality. Thirdly, a recently introduced two-parameter normalization scheme outperforms the other normalization procedures over the entire period, reducing citation disproportions to a level very close to the minimum achievable given the data and the classification system. However, the traditional procedure of using sub-field mean citations as normalization factors yields also good results. 相似文献
7.
科学知识扩散研究框架 总被引：2，自引：1，他引：1
通过对科学知识扩散相关文献的梳理,构建科学知识扩散的研究框架,并对研究对象、扩散关系表示、衡量指标、扩散模型等方面进行详细评述。扩散的对象包括期刊、学科、科研人员等,扩散过程主要以文献引证和作者合著关系表示。在实证中,基于文献引证关系的引文及引文网络分析是科学知识扩散的主流研究方法。衡量指标可以按照测度粒度分为文章、期刊、学科3个层次。现有科学知识扩散的模型研究以定性研究为主,定量化分析较少,常见思路为跨学科借鉴成熟模型。 相似文献
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9.
Document clustering of scientific texts using citation contexts 总被引：3，自引：0，他引：3
Document clustering has many important applications in the area of data mining and information retrieval. Many existing document
clustering techniques use the “bag-of-words” model to represent the content of a document. However, this representation is
only effective for grouping related documents when these documents share a large proportion of lexically equivalent terms.
In other words, instances of synonymy between related documents are ignored, which can reduce the effectiveness of applications
using a standard full-text document representation. To address this problem, we present a new approach for clustering scientific
documents, based on the utilization of citation contexts. A citation context is essentially the text surrounding the reference
markers used to refer to other scientific works. We hypothesize that citation contexts will provide relevant synonymous and
related vocabulary which will help increase the effectiveness of the bag-of-words representation. In this paper, we investigate
the power of these citation-specific word features, and compare them with the original document’s textual representation in
a document clustering task on two collections of labeled scientific journal papers from two distinct domains: High Energy
Physics and Genomics. We also compare these text-based clustering techniques with a link-based clustering algorithm which
determines the similarity between documents based on the number of co-citations, that is in-links represented by citing documents
and out-links represented by cited documents. Our experimental results indicate that the use of citation contexts, when combined
with the vocabulary in the full-text of the document, is a promising alternative means of capturing critical topics covered
by journal articles. More specifically, this document representation strategy when used by the clustering algorithm investigated
in this paper, outperforms both the full-text clustering approach and the link-based clustering technique on both scientific
journal datasets. 相似文献
10.
The scientific impact of a publication can be determined not only based on the number of times it is cited but also based on the citation speed with which its content is noted by the scientific community. Here we present the citation speed index as a meaningful complement to the h index: whereas for the calculation of the h index the impact of publications is based on number of citations, for the calculation of the speed index it is the number of months that have elapsed since the first citation, the citation speed with which the results of publications find reception in the scientific community. The speed index is defined as follows: a group of papers has the index s if for s of its Np papers the first citation was at least s months ago, and for the other (Np ? s) papers the first citation was ≤s months ago. 相似文献
11.
《Journal of Informetrics》2019,13(4):100977
Main path analysis is a popular method for extracting the backbone of scientific evolution from a (paper) citation network. The first and core step of main path analysis, called search path counting, is to weight citation arcs by the number of scientific influence paths from old to new papers. Search path counting shows high potential in scientific impact evaluation due to its semantic similarity to the meaning of scientific impact indicator, i.e. how many papers are influenced to what extent. In addition, the algorithmic idea of search path counting also resembles many known indirect citation impact indicators. Inspired by the above observations, this paper presents the FSPC (Forward Search Path Count) framework as an alternative scientific impact indicator based on indirect citations. Two critical assumptions are made to ensure the effectiveness of FSPC. First, knowledge decay is introduced to weight scientific influence paths in decreasing order of length. Second, path capping is introduced to mimic human literature search and citing behavior. By experiments on two well-studied datasets against two carefully created gold standard sets of papers, we have demonstrated that FSPC is able to achieve surprisingly good performance in not only recognizing high-impact papers but also identifying undercited papers. 相似文献
12.
Metrics based on percentile ranks (PRs) for measuring scholarly impact involves complex treatment because of various defects such as overvaluing or devaluing an object caused by percentile ranking schemes, ignoring precise citation variation among those ranked next to each other, and inconsistency caused by additional papers or citations. These defects are especially obvious in a small-sized dataset. To avoid the complicated treatment of PRs based metrics, we propose two new indicators—the citation-based indicator (CBI) and the combined impact indicator (CII). Document types of publications are taken into account. With the two indicators, one would no more be bothered by complex issues encountered by PRs based indicators. For a small-sized dataset with less than 100 papers, special calculation is no more needed. The CBI is based solely on citation counts and the CII measures the integrate contributions of publications and citations. Both virtual and empirical data are used so as to compare the effect of related indicators. The CII and the PRs based indicator I3 are highly correlated but the former reflects citation impact more and the latter relates more to publications. 相似文献
13.
传统的文献计量学主要基于题录数据展开研究,随着开放获取运动的推进,基于全文数据的文献计量学分析悄然兴起,出现全文引文分析、知识实体抽取、语篇结构功能分析等研究热点。文章从数据基础、研究内容、流程方法3个角度系统阐述全文计量分析的范式和框架。在数据方面,通过回顾分析对象从题录数据到全文数据的变化,展现文献计量学由外在关联到内在本体的演化。在内容方面,选取语词、语句和语篇等不同层面的研究热点,对近年该领域的国内外研究进展和前沿问题进行综述。在方法方面,总结文本分析(包括计算语言学、社会语言学)和计量分析(包括加权分析、序列分析)两类主要的分析范式。 相似文献
14.
数字对象唯一标识符具有唯一性、永久性和多重链接等特点,是实现互联网环境下数字对象永久性定位的
数据系统。数字对象唯一标识符已经在出版领域得到了广泛的应用,在数据出版和引用方面也有很好的应用前景。文章
介绍了中国西部环境与生态科学数据中心在数据引用方面所做的工作,详细介绍了如何在中文DOI 注册中心的帮助下,
利用数字对象唯一标识符对“黑河综合遥感联合试验”产出数据所开展的数据出版和数据引用尝试。文章最后总结了DOI
在数据出版领域的意义,并讨论了DOI 系统对数据出版和引用方面存在的不足,指出了数据中心在面向数据出版和引用
方面存在的挑战和机遇。 相似文献
15.
基于学科有效信息行为的学科服务实践——以清华大学数学学科为例 总被引：1，自引：0，他引：1
清华大学图书馆利用访谈法和引文分析法分析了数学学科的有效信息行为:数学科研工作中常用的文献类型和检索工具,常用期刊的出版年、种数、学科分布、影响因子及全文来源。在此基础上,有针对性地开展了数学学科服务:补充完善学科资源、培养学科信息素养能力、建设学科资源导航,取得了一定的效果。对数学学科有效信息行为的分析结论,对其他高校图书馆的数学学科服务也有参考作用。 相似文献
16.
《Journal of Informetrics》2022,16(3):101304
The way retracted papers have been mentioned in post-retraction citations reflects the perception of the citing authors. The characteristics of post-retraction citations are therefore worth studying to provide insights into the prevention of the citation chain of retracted papers. In this study, full-text analysis is used to compare the distinctions of citation location and citation sentiment—attitudes and dispositions toward the cited work—between the conditions of correctly mentioning the retracted status (called CM) and not mentioning the retracted status (called NM). Statistical test is carried out to explore the effect of CM on post-retraction citations in the field of psychology. It is shown that the citation sentiment of CM is equally distributed as negative, neutral, and positive, while for NM, it is mainly distributed as the latter two. CM papers tend to cite retracted papers in Methodology, whereas NM papers cite more in Theoretical Background and Conclusion. The perception efficiency of retractions in psychology is low, where the average unaware duration (UD, the period between when the retraction note has been published and when the first citation directly pointed out its retracted status) lasts for 2.88 years. Also, UD is negatively correlated with the quantity of CM and the growth rate of NM, the proportionate change of NM before and after the first CM paper appears (P <0.01). After being aware of retractions, the average rate of change (ARC, the total change divided by its taken time) of NM declines significantly (Z=-2.823, P <0.01) whereas CM sees a raise in most disciplines, which contributes to the reduction of possible interdisciplinary impact. 相似文献
17.
《资料收集管理》2013,38(1-2):77-95
The impact of monographs in a vertebrate zoology collection on the scientific literature was assessed using a randomly selected sample (52 monographs), Science Citation Index and a statistical package. Characterstics of the monographs considered were: copyright date, circulation, citation frequency and subdiscipline (ichthyology, herpetology, ornithology, mammalogy). Citing references were dispersed among journals in a wide array of disciplines. A few monographs proved to be very highly cited (one being cited nearly 600 times), and so generated the majority of the database of 2,971 citations. The ichthyology monographs generated the broadest subject dispersion among citing references. The herpetology collection is less active than are the others in terms of circulation and current citation frequency. The sample has been generating an ever increasing share of the citations in the Science Citation Index. A method that applies citation analysis to the evaluation of monograph collections is outlined. 相似文献
18.
科学数据规范引用关键问题探析 总被引：1，自引：1，他引：0
[目的/意义]明确实现规范引用需要解决的基本问题、重点和难点问题,并分析相关利益群体在这一过程中需要承担的责任和未来努力的方向,以引导其更好地厘清思路,推动实践。[方法/过程]借鉴国内外相关研究及实践经验,从科学数据规范引用价值认同入手,从如何引用、引用什么和何时引用三方面阐述科学数据规范引用的基本问题与难点。以此为基础,分析数据规范引用给相关利益群体带来的机遇和提出的要求。[结果/结论]理想的科学数据引用规范应该明确回答如何引用、引用什么和何时引用3个基本问题。如何引用,就是需要制定面向科学数据的元数据规范、建立能够承认作者贡献的评价体系并提供支持科学数据引用的参考文献管理工具;引用什么,就是需要明确引用数据的版本、粒度、数据验证方式以及引用对象等问题;何时引用,就是需要厘清使用数据的情景。相关利益群体应该看到科学数据规范引用给各自带来的机遇以及提出的要求,不断调整以推动数据引用的实践。 相似文献
19.
We propose two new indices that are able to measure a scientific researcher's overall influence and the level of his/her works’ association with the mainstream research subjects within a scientific field. These two new measures – the total influence index and the mainstream index – differ from traditional performance measures such as the simple citation count and the h-index in that they take into account the indirect influence of an author's work. Indirect influence describes a scientific publication's impact upon subsequent works that do not reference it directly. The two measures capture indirect influence information from the knowledge emanating paths embedded in the citation network of a target scientific field. We take the Hirsch index, data envelopment analysis, and lithium iron phosphate battery technology field to examine the characteristics of these two measures. The results show that the total influence index favors earlier researchers and successfully highlights those researchers who have made crucial contributions to the target scientific field. The mainstream index, in addition to underlining total influence, also spotlights active researchers who enter into a scientific field in a later development stage. In summary, these two new measures are valuable complements to traditional scientific performance measures. 相似文献
20.
Eugene Garfield 《Journal of Informetrics》2009,3(3):173-179
While ISSI was founded in 1993, Scientometrics and Bibliometrics are now at least half a century old. Indeed, the field can be traced to early quantitative studies in the early 20th century. In the 1930s, it evolved to the “science of science.” The publication of J.D. Bernal's Social Function of Science in 1939 was a key transition point but the field lay dormant until after World War II, when D.J.D. Price's books Science Since Babylon and Little Science, Big Science were published in 1961 and 1963. His role as the “Father of Scientometrics” is clearly evident by using the HistCite software to visualize his impact as well as the subsequent impact of the journal Scientometrics on the growth of the field. Scientometrics owes its name to V.V. Nalimov, the author of Naukometriya, and to Tibor Braun who adapted the neologism for the journal. The primordial paper on citation indexing by Garfield which appeared in Science 1955 became a bridge between Bernal and Price. The timeline for the evolution of Scientometrics is demonstrated by a HistCite tabulation of the ranked citation index of the 100,000 references cited in the 3000 papers citing Price. 相似文献