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Search Results: 1 - 10 of 18086 matches for " g-index "
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Ambiente & água in the context of impact indicators of scientific Brazilian journals
Nelson Wellausen Dias,Getulio Teixeira Batista
Ambiente e água : An Interdisciplinary Journal of Applied Science , 2010,
Abstract: For quite some time the international scientific community has criticized the use of impact indicators based only on few journals registered at commercially subscribed databases such as the ISI Web of Knowledge (producer of Journal Citation Reports - JCR). Several studies focusing on different subject areas have demonstrated the advantages and disadvantages of assessing the impact of an article, or journal, from commercial and open-access databases, such as Google Scholar (Segen, 1997; Gisvold, 1999; DuBois and Reeb, 2000; Whitehouse, 2002; Baumgartner and Pieters, 2003; Cameron, 2005; Ha et al., 2006; Mingers and Harzing, 2007). Most of the studies found that there was a strong correlation between impact indicators measured by a commercial databases (restricted) and open-access in certain field areas (Science, Health, Biological and Applied Social), while areas usually with lesser coverage by commercial databases (Environment, Humanities, among others) end up having lower impact indicator values based on these commercial databases. Moreover, the number of publications in these last areas has shown a significant expansion recently and, therefore, they end up receiving greater impact scores when evaluated by open-access databases. In these cases the correlation between impact indicators calculated by restricted versus open-access database is significantly lower. In this exercise, developed to obtain impact values of various Brazilian scientific journals in international open-access databases, not only it could be demonstrated the role that the journal Ambiente & água withholds in the national scientific community (and even international if considered the information published in previous editorials), but also witnesses the degree of efficiency, transparency, and simplicity of the indicators used. The Editorial Board of the journal Ambiente & água stands in favor of using indicators that are transparent, simple, and free of charge in the process of assessing the impact of published articles and scientific Brazilian journals.
A Comparative Analysis of the Application of H-index, G-index, and A-index in Institutional-Level Research Evaluation
Mu-hsuan Huang,Pei-shan Chi
Journal of Library and Information Studies , 2010,
Abstract: This study compared the application of h-index, g-index, and A-index in institutional level research evaluation. 99 universities in Taiwan were ranked by the three indices. Most of the universities had relatively low publication and citation numbers at the time of this study. The analysis focused on the range of equal values resulted from the three different indices, the range of disparity, the order or rank, and the degree of correlation among the indices. The results showed that g-index and h-index were similar in that the use of the two indices produced similar values and rankings. Both had the problem of equal value in which multiple universities got the same index value, making it difficult to differentiate the universities’ performance. In contrast, A-index was able to rank the universities by emphasizing on the highly cited articles and at the same time avoided the problem of equal value. It was thus considered a better index for the institutional level research evaluation in Taiwan.
Citation analysis of the University of Pri tina located in Kosovska Mitrovica
?ur?evi? Du?an ?.
Sociologija , 2010, DOI: 10.2298/soc1004421d
Abstract: Paper gives the results of the first ever performed scientometric research and citation analysis and assessment of the full-time faculty of the University of Pri tina located in Kosovska Mitrovica (University of KM). Lists of most cited scientists, researchers and Professors employed at the University of KM are presented, as well as lists of their most cited scientific papers. Scientometrics results are obtained by using well-known and efficient web browsers and index citation databases. H-index and G-index are calculated for individuals and for the entire University of KM. The results presented in this paper are only a part of results obtained in the pioneering research aimed to assess the quality of individuals and activities at the University of KM by using up-to-date scientometric and bibliometric methods. The main objective of the research is to enhance the transparency of research, scientific and teaching activities at the University of KM. Objective evidence on the University of KM and other Serbian universities is absolutely necessary in order to put together an adequate action plan to improve the quality of higher education and university system in the Republic of Serbia.
Impact Factor and other metrics for evaluating science: essentials for public health practitioners.
Angelo G. Solimini,Renata Solimini
Italian Journal of Public Health , 2011, DOI: 10.2427/5650
Abstract: : The quality of scientific evidence is doubly tied with the quality of all research activities that generates it (including the “value” of the scientists involved) and is usually, but not always, reflected in the reporting quality of the scientific publication(s). Public health practitioners, either at research, academic or management levels, should be aware of the current metrics used to assess the quality value of journals, single publications, research projects, research scientists or entire research groups. However, this task is complicated by a vast variety of different metrics and assessment methods. Here we briefly review the most widely used metrics, highlighting the pros and cons of each of them. The rigid application of quantitative metrics to judge the quality of a journal, of a single publication or of a researcher suffers from many negative issues and is prone to many reasonable criticisms. A reasonable way forward could probably be the use of qualitative assessment founded on the indications coming from few but robust quantitative metrics.
Corporate Governance and Corporate Creditworthiness
Dror Parnes
Journal of Risk and Financial Management , 2011, DOI: 10.3390/jrfm4010001
Abstract: We examine the relation between corporate governance and bankruptcy risk as an underlying force affecting a bond’s yield. The level of corporate governance is captured by the G-index, along with the explicit groups of governance provisions. We estimate bankruptcy risk by Z-score, by cash-flow-score, by O-score, through Merton structural model default probabilities, and by S&P credit ratings. After addressing endogeneity and while controlling for firm-specific factors, based on the four objective methodologies we find that corporate governance is inversely related to bankruptcy risk. Yet, rating agencies take a mixed approach towards this association likely because of the conflicting impact of different governance provisions.
The R- and AR-indices: Complementing the h-index
BiHui Jin,LiMing Liang,Ronald Rousseau,Leo Egghe
Chinese Science Bulletin , 2007, DOI: 10.1007/s11434-007-0145-9
Abstract: Based on the foundation laid by the h-index we introduce and study the R- and AR-indices. These new indices eliminate some of the disadvantages of the h-index, especially when they are used in combination with the h-index. The R-index measures the h-core’s citation intensity, while AR goes one step further and takes the age of publications into account. This allows for an index that can actually increase and decrease over time. We propose the pair (h, AR) as a meaningful indicator for research evaluation. We further prove a relation characterizing the h-index in the power law model.
New Developments Related to the Hirsch Index
Hirsch 指数研究的新进展

Ronald Rousseau KHBO,

科学观察 , 2006,
Abstract: A precise definition of the discrete Hirsch index (h-index for short) is given and the notion of a Hirsch core is introduced.The concept of a h-index is generalized to a real-valued setting.Definitions and examples are given of some other generalizations of the h-index,namely the g-index and the A-index.It is concluded that the h-index and the g-index taken together present a concise picture of a scientist's achievements in terms of publications and citations.
Recent Developments Related to the h-index: 2007-2008

Ronald Rousseau KHBO,

科学观察 , 2008,
Abstract: In this article we give a short overview of recent (mainly 2007-2008) developments related to the h-index and its generalizations.
Nodulation, Chloropyhll Content and Nitrogen Yield of Two Woody Legumes at a Rainforest Location in Nigeria
J.T. Opabode,O.A. Akinyemiju
Journal of Biological Sciences , 2007,
Abstract: Field studies were conducted at Ile-Ife between 2000 and 2002 to compare the nodulation, chlorophyll content and nitrogen accumulation of Leucaena leucocephala (Lam) de Wit cv. 28 and Gliricidia sepium (Jacq.) Walp cv. ILG50 at the early stages of growth (2-16 Months after Planting) (MAP) to evaluate the two species under no external input system routinely practiced by farmers. A Randomized Complete Block Design in three replications with species as the single factor was used. The number of nodules produced by G. sepium (96.0/plant) was higher than in L. leucocephala (44.0/plant). At 12 and 16 MAP, leaf total chlorophyll content of G. sepium was 6.12 μM g-1 and significantly (p<0.05) higher than 4.12 μM g-1 produced by L. leucocephala. However, chlorophyll stability index of L. leucocephala was greater significantly (p<0.05) than that of G. sepium (94.5 vs 69.7%). At final sampling (16 MAP), G. sepium partitioned 48.3 and 51.7% of its total nitrogen content to below ground and above ground parts, respectively. In contrast, L. leucocephala partitioned 35.3 and 64.7% of its total nitrogen content into below ground and above ground parts respectively. Significantly (p<0.05) higher nitrogen accumulation occurred in G. sepium (54.20 kg/plant) than in L. leucocephala (42.80 kg/plant) at 16 MAP. It is concluded from the study that productivity of G. sepium as hedge species is higher than L. leucocephala in terms of nodulation, chlorophyll content and nitrogen yield under no-external input field conditions.
Los índices H, G y R: su uso para identificar autores líderes en el área de la comunicación durante el período 2001-2006
Arencibia Jorge,Ricardo; Carvajal Espino,Rachel;
ACIMED , 2008,
Abstract: the current paper studied the application of h, g and r indices, based on citation analysis, for the identification and characterization of leader authors in a scientific discipline. the communication area was selected as an experimental research field. all the world scientific production on the subject, published in mainstream journals during the period 2001-2006, was retrieved. the 60 most productive authors were identified, and the h, g and r indices were calculated for each of them. the statistical distribution of the indicators, as well as their usefulness in the research assessment processes were analyzed.
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