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1.
单篇期刊论文h指数的实证研究——以图书情报学为例 总被引：2，自引：0，他引：2
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Recently Woeginger [Woeginger, G. H. (2008-a). An axiomatic characterization for the Hirsch-index. Mathematical Social Sciences. An axiomatic analysis of Egghe's g-index. Journal of Informetrics] introduced a set of axioms for scientific impact measures. These lead to a characterization of the h-index. In this note we consider a slight generalization and check which of Woeginger's axioms are satisfied by the g-index, the h(2)-index and the R2-index. 相似文献
3.
《Journal of Informetrics》2022,16(4):101340
We show that the h-index, g-index, ψ-index, and p-index, are related through the inequalities: h ≤ p ≤ g ≤ ψ. Moreover, this relation is proved theoretically in the mathematical framework of Lotkaian informetrics and is verified empirically by using two datasets from the Web of Science in the fields of electrochemistry and gerontology. For quantifying their relations, we estimate the g-index, ψ-index, and their cores and ratios of cores via a second-order Taylor series when the e-index, h-index, and C1 (the maximum number of citations received by a paper) are known. Then we find for the two empirical cases, that ratios of cores and average citations are approximately stable. Compared with the g-index, the offset-ability of the h-index decreases by 20% but the average citations increase by 20%. A similar observation holds for the comparison of the g-index and ψ-index. To explore the possible applications of cores of different indices, we apply them to extract the core structure of a network. The h-core is the most efficient, while the ψ-core includes more nodes with high betweenness. 相似文献
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[目的/意义]探讨被引频次位置指标在科技期刊评价中的作用,确定合适时间窗口的最优位置指标。[方法/过程]从Web of Science数据库中选取符合条件的14种眼科期刊作为研究对象,分别计算各期刊2014年度不同位置指标,包括2年、5年、8年和10年引证时间窗口(citation time window,CTW)的h指数(h2、h5、h8和h10)、累计h指数(a-h2、a-h5、a-h8和a-h10)以及相对应的期刊2014年度被引频次百分位数位置(percentage rank position,PRP)指标(Top1%、Top5%、Top10%、Top25%Top50%)和累计PRP指标(a-Top1%、a-Top5%、a-Top10%、a-Top25%和a-Top50%)。比较影响因子、不同CTW位置指标与期刊问卷调查评分的相关度,确定不同位置指标应用于期刊评价的效果。[结果/结论]合理的位置指标在期刊影响力评价中优于影响因子和5年影响因子,累计被引频次位置指标普遍优于年度指标,2年CTW的h指数优于其他CTW的h指数,5年CTW的a-h2、h2,5年和8年CTW的a-Top50%和Top50%与影响因子和5年影响因子相比具有更理想的期刊评价效果。 相似文献
6.
Marina Encheva Anna Maria Tammaro Alexandra Kumanova 《International Information and Library Review》2020,52(2):130-138
AbstractAs digital natives enter higher education, there is the need to improve their information skills but they often overestimate their information research skills and are unfamiliar with the library. The serious games give the opportunity for innovative and engaging approaches to information literacy learning. The paper describes NAVIGATE - Information Literacy: a Game-based Learning Approach for Avoiding Fake Content, a project funded by Erasmus?+?program. The Project aims to improve the competences to avoid fake content of the higher education students in the Humanities. The paper focuses on the comparative analysis of the students’ skills gap and the difficulty of actually assessing the learning improvement achieved by games, highlighting the lessons learned and the open issues. 相似文献
7.
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
8.
Tiziana Lombardo Marie Wörle Vera Hubert Erwin Hildbrand Christina Hinterleitner Ingo Mayer 《文物保护研究》2020,65(2):65-76
ABSTRACTPreviously, heavy use of biocides for the treatment of objects made of organic materials in museum collections (e.g. ethnographic, historical collections) was very common. Now suitable decontamination methods/technologies are being sought. A decontamination treatment by li-CO2 was optimized that considered the specific requirements of museum objects. The treatment was tested on model materials artificially contaminated with biocide solutions containing dichlorodiphenyltrichloroethane (DDT), pentachlorophenol (PCP), lindane, and permethrin or cypermethrin. High decontamination was achieved for DDT, lindane, PCP, and permethrin on artificially biocide loaded wool and wood model materials. Optimal process parameter settings for li-CO2 decontamination include a single 30?min cycle for woolen materials and three sequential 30?min cycles each for wood. These methods allow a reduction of at least 90% of all biocides for wool and between 70% and 85% for wood. Decontamination of the latter was more effective for less polar biocides as DDT and permethrin. Despite a significant improvement in decontamination for wood using co-solvents such as acetone, ethanol, and methyl tertiary-butyl ether (MTBE), their use is not recommended due to the increased risk of damage to the objects, in particular if a surface coating is present. 相似文献
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We address issues concerning what one may learn from how citation instances are distributed in scientific articles. We visualize and analyze patterns of citation distributions in the full text of 350 articles published in the Journal of Informetrics. In particular, we visualize and analyze the distributions of citations in articles that are organized in a commonly seen four-section structure, namely, introduction, method, results, and conclusions (IMRC). We examine the locations of citations to the groundbreaking h-index paper by Hirsch in 2005 and how patterns associated with citation locations evolve over time. The results show that citations are highly concentrated in the first section of an article. The density of citations in the first section is about three times higher than that in subsequent sections. The distributions of citations to highly cited papers are even more uneven. 相似文献
10.
《Journal of Informetrics》2014,8(3):493-502
We first introduced interesting definitions of “heartbeat” and “heartbeat spectrum” for “sleeping beauties”, based on van Raan's variables. Then, we investigated 58,963 papers of Nobel laureates during 1900–2000 and found 758 sleeping beauties. By proposing and using Gs index, an adjustment of Gini coefficient, to measure the inequality of “heartbeat spectrum”, we observed that publications which possess “late heartbeats” (most citations were received in the second half of sleeping period) have higher awakening probability than those have “early heartbeats” (most citations were received in the first half of sleeping period). The awakening probability appears the highest if an article's Gs index exists in the interval [0.2, 0.6). 相似文献
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L. Egghe 《Journal of Informetrics》2013,7(2):388-393
The minimum configuration to have a h-index equal to h is h papers each having h citations, hence h2 citations in total. To increase the h-index to h + 1 we minimally need (h + 1)2 citations, an increment of I1(h) = 2h + 1. The latter number increases with 2 per unit increase of h. This increment of the second order is denoted I2(h) = 2.If we define I1 and I2 for a general Hirsch configuration (say n papers each having f(n) citations) we calculate I1(f) and I2(f) similarly as for the h-index. We characterize all functions f for which I2(f) = 2 and show that this can be obtained for functions f(n) different from the h-index. We show that f(n) = n (i.e. the h-index) if and only if I2(f) = 2, f(1) = 1 and f(2) = 2.We give a similar characterization for the threshold index (where n papers have a constant number C of citations). Here we deal with second order increments I2(f) = 0. 相似文献
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General results on transformations on information production processes (IPPs), involving transformations of the h-index and related indices, are applied in concrete, simple cases: doubling the production per source, doubling the number of sources, doubling the number of sources but halving their production, halving the number of sources but doubling their production (fusion of sources) and, finally, special cases of general power law transformations. In each case we calculate concrete transformation formulae for the h-index h (transformed into h*) and we discuss when we have h* < h, h* = h or h* > h.
These results are then extended to some other h-type indices such as the g-index, the R-index and the weighted h-index. 相似文献
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W. ANDERSON 《Health information and libraries journal》1984,1(2):83-87
* Fictitious names have been used to protect these individuals.相似文献
was pre-lingually deaf, from three generations of deaf people. Today she is outgoing and successful in her job, and a ready communicator with everyone, deaf and hearing alike. Her communicating idioms, with both groups, are rich. She benefited from the twin forces in her childhood of family (all her family were highly attuned to the non-verbal idioms of communication) and one grandmother (who was hearning, and who provided what came to be seen as teh key intervening role at that time in Joan's development of a second language, the idiom of spoken English). Her own intellectual drive was the final component in a combination of motivating influences which led her to respond to both the financial and social necessities to gain verbal codes, leading to an ability to read and to understand what she read. She remains totally deaf and she knows that her speaking voice is not understood by strangers. Frank * * Fictitious names have been used to protect these individuals.
is a regular reader of newspapers, at least, that's what you would think if you saw him regularly. He does know certain words (or rather parts of words) and he constructs a story from his understanding of whatever catches his eye. At his job, which he does with skill, he is confident and earns the trust of colleagues and superiors. He is, however, illiterate. He knows that if he is seen to be ‘reading’ he will sustain the image he has created that he can read: he acts like a literate person. He is confident and competent in what he knows, which is enough for the regular and recurring nature of the tasks he is asked to perform in his job. He is knowledgeable and defensive about that knowledge but as a accepted at work, but any change or new demand, print-based, would sweep away his precarious confidence and, probably along with that, his job.
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Hannah Schilperoort Alvaro Quezada Frances Lezcano 《Journal of the Medical Library Association》2021,109(1):13
Objective:While studies from the early 1990s show that library staff in nonlibrarian roles interpret the term “paraprofessional” as being demeaning to their roles, no recent research has been conducted on this topic. This study aims to investigate if health sciences library staff continue to have similar negative associations with the term “paraprofessional” and to determine if another term is preferred.Methods:The authors conducted a literature review to identify terms used to categorize library staff in nonlibrarian roles. Using these terms, we created an online Qualtrics survey asking participants to rank terms by preference. We distributed the survey via thirty-six professional email discussion lists, including MEDLIB-L, thirty-three MLA chapter and caucus email discussion lists, DOCLINE-L, and ACRL-HSIG-L. Survey participants included full-time and part-time health sciences library staff in any nonlibrarian position. Responses from librarians were not accepted.Results:Based on 178 completed surveys, “library staff” was the top choice of 49% of participants, over “other” (19%), “paraprofessional” (13%), “library support staff” (11%), “paralibrarian” (7%), and “nonprofessional” (1%). Although “library staff” was the top choice of participants across all ages, older participants (aged 45–75) preferred “library support staff” and “paraprofessional” to a greater degree than younger participants (aged 18–44), while younger participants preferred “other” to a greater degree. Out of 36 participants who specifically mentioned the terms “paraprofessional” or “paralibrarian,” 32 (89%) of those comments were negative, indicating that the “para” in “paraprofessional” and “paralibrarian” is either insulting, inapplicable, or unfamiliar.Conclusions:Our results suggest that although the term “paraprofessional” may not intentionally be used to demean library staff, many library staff interpret the term to be demeaning to their roles. Instead, “library staff,” a more inclusive and less divisive term, was preferred by survey participants. In accordance with our results, we believe the term “paraprofessional” should no longer be used in library and information scholarly literature or professional discourse. 相似文献
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《文物保护研究》2013,58(4):265-273
AbstractThis paper reports on the results of experiments to test for visual changes to paint systems after biocidal treatments, using a statistical binary procedure. Four biocides were selected, two of which are fungicides—a quaternary ammoniumorganotin mixture (BioMet 66®)in distilled water and an orthophenylphenol (Lysol®) in a spray— and two of which are fumigants—sulfuryl fluoride (SO2F6), a gas (Vikane®), and nitrogen gas (N2) (as an anoxant). The procedure used to assess the effect of the biocidal treatments was a random field visual scoring regimen by two paintings conservators. The tests were conducted on 30 combinations of linen, rabbitskin glue size, lead white oil ground and oil-based paints. The visual assessment procedure provided information on color change, gloss change, blanching, topography change and precipitation. The results indicated that Vikane adversely affected 10 of 11 pigment systems; Lysol adversely affected six of 11 pigment systems; BioMet 66 had a minor effect on four of 11 pigment systems; and nitrogen had no visible effect on any sample. The visual technique provided a quick and broad method for assessment of non-subtile visual changes. 相似文献
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《文物保护研究》2013,58(1):23-29
AbstractUpon aging, paper documents and books become progressively damaged. Paper deacidification is a fundamental conservation intervention. In this study, we report on the use of nanoparticles of titanium dioxide (TiO2) and magnesium hydroxide (Mg(OH)2) associated with hydroxyethylcellulose (HEC) to inhibit acidification, photo-induced degradation, and biodeterioration of paper. With the aid of ultrasound, Mg(OH)2 nanoparticles with a narrow size distribution can be obtained through homogeneous precipitation in water. Furthermore, to demonstrate the efficacy of the nanocomposite and the performance of treated and untreated paper, photo- and thermal-induced degradation is discussed. The results show that using the controlled double-jet precipitation (CDJP) it is possible to synthesize Mg(OH)2 particles with a narrow size distribution (18–87 nm). The nanocomposite of Mg(OH)2–TiO2–HEC increases the durability of paper by imparting fungal growth resistance (D = 34.6 mm), moderate alkalinity (pH = 8.4), mechanical reinforcement (from 817–896 N/m), and UV protection. Additionally, there is a slight color difference (ΔE* = 0.8) between the treated and untreated paper. Both photodegradation and thermal degradation indicate that the paper treated with this nanocomposite (Mg(OH)2–TiO2–HEC) has increased stability. 相似文献
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Ninfa Pe?a-Purcell 《Journal of the Medical Library Association》2008,96(2):101-107
Purpose: The research examined use of the Internet to seek health information among Hispanics in the United States.Methods: A secondary analysis used the Impact of the Internet and Advertising on Patients and Physicians, 2000–2001, survey data. Pearson''s χ2 test, multivariate analysis of variance (MANOVA), analysis of variance (ANOVA), and independent samples t tests were conducted to test for relationships and differences between facets of Hispanic and non-Hispanic white online health information seeking.Results: Findings indicated lower Internet health information seeking among Hispanics (28.9%, n=72) than non-Hispanic whites (35.6%, n=883). On a scale of 1 (strongly agree) to 4 (strongly disagree), Hispanics were likely to agree that Internet health information improves understanding of medical conditions and treatments (M=1.65), gives patients confidence to talk to doctors about health concerns (M=1.67), and helps patients get treatment they would not otherwise receive (M=2.23). Hispanics viewed their skills in assessing Internet health information as good. Overall ratings were also positive for items related to sharing Internet health information with a doctor. Conflicting with these findings, Hispanics (M=3.33) and non-Hispanic whites (M=3.46) reported that physician-patient relationships worsened as a result of bringing online health information to a visit (scale 1=a lot better to 5=a lot worse).Conclusion: This study provides further evidence of differences in Internet health information seeking among Hispanics and non-Hispanic whites. Cultural discordance may be a possible explanation for Hispanics'' view that the Internet negatively impacts physician-patient relationships. Strategies to increase Hispanics'' access to Internet health information will likely help them become empowered and educated consumers, potentially having a favorable impact on health outcomes.
Highlights
- Consistent with prior studies, a lower proportion of Hispanics compared to non-Hispanic whites reported using the Internet to seek health information.
- Overall, Hispanics tended to agree that the Internet is a helpful resource for health information.
- Hispanics and non-Hispanic whites reported that bringing Internet health information to doctors'' visits worsened the physician-patient relationship.
- Consistent with prior literature, the odds of seeking Internet health information were decreased for Hispanics with low (<$25,000) and middle ($25,000– $49,000) household incomes.
Implications
- More studies are needed to provide evidence to develop culturally appropriate interventions to examine differences in Internet use and potential digital disparities among Hispanics.
- Concurrent with increasing Hispanics'' use of Internet health information, efforts to address the Internet''s impact on physician-patient relationship are warranted.
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Paul Wasserman Janiece McLean Brian Rust Stefan Kanfer K. Aubrey Stone Richard F. Hixson 《Communication Booknotes Quarterly》2013,44(3):8-9
Paul Wasserman and Janiece McLean's Consultants and Consulting Organizations Directory (Detroit: Gale Research Co., 1973—$45.00), Brian Rust's The Complete Entertainment Discography from the mid-1890s to 1942 (New Rochelle, N.Y.: Arlington House, 1973—$12.95) Stefan Kanfer's A Journal of the Plague Years (New York: Atheneum, 1973—$7.95) K. Aubrey Stone's I'm Sorry, the Monopoly You Have Reached is not in Service (New York: Pallantine/Grassroots, 1973—$1.50, paper) Richard F. Hixson's Mass Media: A Casebook (New York: Crowell, 1973—price not known, paperback), Donald I. Rogers' Since You Went Away (New Rochelle, N.Y.: Arlington House, 1973—$8.95), 相似文献
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Melissa Gomis Carole Gall Frances A. Brahmi 《Medical reference services quarterly》2013,32(3):260-271
ABSTRACT The authors of this article analyzed the differences in output when searching MEDLINE direct and MEDLINE via citation management software, EndNote X1®, EndNote Web®, and RefWorks©. Several searches were performed on Ovid MEDLINE and PubMed directly. These searches were compared against the same searches conducted in Ovid MEDLINE and PubMed using the search features in EndNote X1, EndNote Web, and RefWorks. Findings indicated that for in-depth research users, should search the databases directly rather than through the citation management software interface. The search results indicated it would be appropriate to search databases via citation management software for citation verification tasks and for cursory keyword searching. 相似文献
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In a recent work by Anderson, Hankin, and Killworth (2008), Ferrers diagrams and Durfee squares are used to represent the scientific output of a scientist and construct a new h-based bibliometric indicator, the tapered h-index (hT). In the first part of this paper we examine hT, identifying its main drawbacks and weaknesses: an arbitrary scoring system and an illusory increase in discrimination power compared to h. Subsequently, we propose a new bibliometric tool, the citation triad (CT), that better exploits the information contained in a Ferrers diagram, giving a synthetic overview of a scientist's publication output. The advantages of this new approach are discussed in detail. Argument is supported by several examples based on empirical data. 相似文献