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PurposeMethodsResultsConclusionsPrompted by the clinical concern that limited healthcare resources allocation affects physicians’ research productivity, this study examines the association between bibliometric indices of ophthalmologic research and national economic indicators in Organisation for Economic Co-operation and Development (OECD) countries.The Scimago Journal and Country rank source was searched for research productivity data in ophthalmology among OECD countries between 1996 and 2019. Bibliometric indices included: documents number, number and percent of citable documents, citations number, citations per document, and H-index. The updated economic indicators of each country (gross domestic product [GDP] per capita, health spending as percent of GDP (health expenditure), gross domestic expenditure on research, and development as percent of GDP [GERD]) were collected from the World Bank and the OECD websites. Correlation between economic and bibliometric metrics and multivariate linear regression analyses were performed.Among 267,444 documents analyzed, correlation analysis found a strong correlation between health expenditure and H index (r = 0.711, p < 0.001); a moderate correlation between health expenditure and documents number (r = 0.589, p < 0.001), number of citable document (r = 0.593, p < 0.001) and citations number (r = 0.673, p < 0.001); and a moderate correlation between GERD and H index (r = 0.564, p < 0.001). Multivariate regression analysis controlling for economic factors, population and language showed the independent association of these parameters with bibliometric indices.This study demonstrates a positive correlation between bibliometric indicators of ophthalmology research and economic factors, particularly health expenditure, among the OECD countries. Our results suggest an advantage of domestic investment in health to expand academic productivity in the field of ophthalmology. [ABSTRACT FROM AUTHOR]

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Scientific productivity makes for an important indicator to all scientific institutions and professionally recognized scientists. Scientific activity is of particular interest to Republic of Croatia, as it holds a special place in the international (and particularly European) scientific domain. Scientists are known for their reputation, i.e., their productivity is often recognized in magazines that publish their research papers. University North has recently established a special reward system for scientist, in order to ensure proper rewards for scientific accomplishments, i.e., for published research papers, citations of said papers, and an overall improved recognition of the institution that employs them. This system has certain rules and criteria for rewarding scientists. The rewards in and of themselves are contributing to popularization of science at the institution in question; furthermore, rewarding provides for a very good incentive for publishing many research papers with excellent indexing. Publishing research papers is also important to the institution the paper is referencing, as it adds to said institution’s visibility and recognition in the European and international domain of research and science. [ABSTRACT FROM AUTHOR]

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The present work was carried out with the objective of presenting the current importance of work related to the optimization of anaerobic digesters using artificial neural networks. A scientometric methodological approach was used for a systematic review of the publications indexed in Scopus until 2023. The H index was used to evaluate the visibility and impact of the journals, authors, countries, and institutions with the highest levels of production and recognition in the field of study. This review also allowed us to analyze the interaction between groups and knowledge networks with the authors and institutions identified in the classification. The results show a significant increase in the number of publications between the years 1973 and 2023, which allow us to characterize on a scale the main dimensions of research, development and innovation related to the study of optimization methods of anaerobic biodigesters for the production of biogas from different waste such as that from the palm oil extraction process. The results show a significant increase in the number of publications between 2016 and 2023, a total of 2847 documents were found, where 95.64% are in English. The country that presents the most publications on the topic is China with a contribution of 19.28%, followed by the United States with 9.8%, India with 7.2% and Spain with 6.2% among others.

Scientific productivity makes for an important indicator to all scientific institutions and professionally recognized scientists. Scientific activity is of particular interest to Republic of Croatia, as it holds a special place in the international (and particularly European) scientific domain. Scientists are known for their reputation, i.e., their productivity is often recognized in magazines that publish their research papers. University North has recently established a special reward system for scientist, in order to ensure proper rewards for scientific accomplishments, i.e., for published research papers, citations of said papers, and an overall improved recognition of the institution that employs them. This system has certain rules and criteria for rewarding scientists. The rewards in and of themselves are contributing to popularization of science at the institution in question; furthermore, rewarding provides for a very good incentive for publishing many research papers with excellent indexing. Publishing research papers is also important to the institution the paper is referencing, as it adds to said institution’s visibility and recognition in the European and international domain of research and science.

The assessment and evaluation of the academic influence of the researcher is a challenging task. This task allows the scientific community to make valuable decisions, such as identifying leading experts in a specific field, nominating candidates for scientific awards, awarding scholarships/grants, promoting researchers, and selecting tenure positions. Scientists have proposed various varied and multifaceted metrics to determine the most influential researchers. These metrics are the citation count, total number of publications, hybrid approaches, h-index, and variants of the h-index. Contemporary research in this domain shows that there is no universally accepted yardstick available for determining the finest parameter to recognize the most influential researcher within a particular domain. Moreover, to recognize the potential metric, some researchers have conducted evaluation surveys. In these evaluation surveys, the researchers utilized a limited number of indices on a small and imbalanced dataset as well as on fictional case scenarios, which makes it challenging to determine the significance and influence of each metric over the others. The present study computed fourteen distinct metrics based on the author-count. Our aim is to determine the potential metrics. For experimental purposes, we collected 1050 researchers’ data from the mathematics domain. For the benchmark dataset, we have collected the awardee’s data of the last three decades of four different societies of mathematics domain. To evaluate these metrics, we first computed the Spearman correlations among the obtained values of these metrics to assess their similarities and differences. The results showed a high degree of correlation among these metrics. However, some metrics represent weak correlations, signifying that their rankings are highly dissimilar to those of the other metrics. Furthermore, the position of award winners is checked in the top 10, 50, and 100 return records based on a ranked list of each metric. The potential value of each metric such as the hf metric, indicates that 60% of the awardees in the top 10% of the ranked list are associated with this, whereas the potential value of fractional g metric is linked with 49% of the awardees in the top 100% of the ranked list. In addition, it is further scrutinized that most of the award winners lie in a top position belonging to IMS, LMS, and AMS society return by fractional g-index, gf index, and gm index, which indicates that there is some relationship between these societies and metrics.

Ranking of researchers based on their scientific impact in a scientific community is indeed a very crucial task. However, identifying the researchers ranking helps the scientific community in various decisions such as awarding scholarships, selection for tenure, awarding achievements, giving promotions, etc. In literature numerous parameters have been proposed for the ranking of researchers, such as publication count, citation count, coauthor count, h-index, and its extensions. The current state-of-the-art research delineates that no such universally accepted parameter exists which can identify the most influential researchers. Therefore, it is necessary to determine an optimal parameter that can effectively rank authors. Furthermore, to identify the best parameter, few of the researchers conducted evaluative surveys as reflected in the literature. In these evaluative surveys, the researchers utilized a limited number of indices on the small and imbalanced datasets, followed by fictional cases and scenarios, this has made it challenging to ascertain the relative importance and impact of each parameter in comparison to the others. This research evaluates the h-index and its thirty-two variants, which are based on the number of publications and citation count category used for ranking the authors. We have collected data from 1050 researchers working in the mathematical domain for our experimental purposes. For the benchmark dataset, we have collected the awardees’ data of the last two decades of four different societies belonging to mathematical domain. First and foremost, we have computed the correlations among the obtained values of the indices to assess their similarities and differences to evaluate indices. The result revealed that there is a high degree of correlation observed among h-index and it’s twenty-four different variants. However, some indices showed a weak correlation, signifying that their rankings were highly dissimilar to those of other indices. Secondly, the position of awardees is checked in the top 10, top 50, and top 100 return records based on the ranking list of each index. The outcome of the last step divulges that A index, E index, H core citation, H2 lower index, K index, M index, and woginger index retrieved almost 80% of awardees in top 10% ranked list. Further, the analysis revealed that most of the winners (awards) were in the top tier, belonging to IMS, LMS, and AMS society returned by hg index, g index, k index, etc. indicating a relationship between the stated societies and the indices.

The present study deals with the open-access Internet of Things (IoT) research in the global output for the span of ten years based on the Web of Science (WoS) core collection database, during the period 2011-2020. The main aims of the study are - a scientometric output of all open access internet of things (IoT) research, in respect of the growth of research output, relative growth rate and doubling time, yearwise distribution, language-wise distribution, country collaboration, most prolific authors, most prolific journals, most relevant authors keywords, conceptual structure map, and intellectual structure. The highest number of records published is 3700 in 2020 out of 10628 on open access IoT research, whereas the year 2011 is marked for holding the lowest position having only 18 records during the study period. In this study, among the top 20 authors, Zhang Y is in the top position by publishing 73 articles, getting citations 1143, h-index 13, g-index 33, and m-index 0. China is registered as the most productive country with 3092 world publications share. The majority of publication in open access IoT has been published in the form of IEEE Access in most relevant source with 2504 publications, total citation 24248, h-index 63, g-index 111, and m-index 7.875. This study indicates the relative growth rate and doubling time of open access IoT research across the globe irrespective of citation count, collaboration rate, and so on. [ABSTRACT FROM AUTHOR]

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Abstract Background A team of 3 scientometrists led by John Ioannidis published in 2020 an extensive and updated database (ca. 6.9 million researchers in 22 disciplines and 176 sub-disciplines), ordering them according to a composite bibliometric index that measures their whole trajectory (career-long) impact and their annual impact at year 2019. They reported the top 100,000 scientists (1.45% across all disciplinary fields) or the top 2% of each subfield discipline, thus publishing the ranking of ca. 150,000 researchers worldwide. Methods and findings We filtered that information for the disciplinary and sub-disciplinary areas corresponding to Ecology and identified a total of 14 ecologists with residence in Chile that appear in either of those two worldwide rankings. We report their measured productivity as both whole trajectory (career-long) and as annual impact at year 2019. We attribute their high registered productivity to their training at the doctoral level in prestigious foreign universities, their academic positions in internationally recognized Chilean universities, and their participation in state-funded research centers of scientific excellence. Exceptions to the rule are presented. Conclusions The 14 ecologists identified with the scientometric algorithm proposed by Ioannidis and coworkers include, but are not restricted, to the most cited ecologists in Chile. We put forth possible reasons for some puzzling omissions from these rankings.

This work seeks to find the Most Valuable Researcher (MVR) within the academics of Faculties of Engineering and Business of a University in Chile, applying bibliometric indicators and collaboration networks. The methodology consisted in reviewing the literature referring to similar bibliometric studies from open databases, such as SciELO and Google Scholar. As a result of the study, a model was proposed based on the main bibliometric indicators used, with it was possible to filter the researchers from both faculties and establish a ranking with those academics with the best results and the current situation facing the research in each unit. This ranking indicates the standard that the most valuable researchers have, identifying that the variable “collaborative networks” has a direct relationship with the productivity of researchers and, also, the existence of correlations with indicators of network grade, co-authorship, and research area. This work seeks to deliver recommendations on the quantity and quality of scientific production within the University. Future research should include other databases and expand the scope by region, country, and area of expertise, and consider other factors such as the age of the researcher, forms of citation, and characteristics by area of knowledge, as well as deepen the concept of MVR, and its virtuous effect on the productivity of an academic unit.

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We searched PVS-related literature in the Web of Science Core Collection database, extracted and analyzed the data using the Science Citation Index Extended Edition, and included two types of literature: review and monograph. The search terms were subject = persistent vegetative state and publication year (2001-2021) and language = English. Statistical analysis of literature overview, countries and regions, institutions, authors, literature source publications, literature research direction, citation frequency, impact factor, H-index and keywords, etc. are carried out. Use VOS viewer 1.6.17 software to visually cluster the keywords in the titles and abstracts of the included literature and analyze the research direction and development trend. A total of 772 PVS-related documents published in the core collection database of Web of Science from 2001 to 2021 were included. The country with the largest number of publications was the United States (261 papers, 33.80%), and the institution with the largest number of publications was the University of Liège, Belgium (40 papers, 5.18%). The author with the largest number of published papers is Laureys S of the University of Liège, Belgium (39 papers, 5.05%). The research directions of PVS are mainly neuroscience (350 articles, 45.33%), rehabilitation (98 articles, 12.69%), and internal medicine (9 articles, 11.79%). The literature is mainly from Brain Injury. The annual average impact factor of the top 10 journals in 2020 was 4.55, and their publication volume accounted for 17.35% (134/772) of the total literature. The 772 articles were cited 23,503 times (21,400 self-citations were excluded), with an average of 30.44 citations per article. The H-index of the United States, the United Kingdom and Belgium are 48, 27 and 27, which are significantly higher than other countries, and the citation frequencies are 8609, 3451 and 3270, accounting for 36.60%, 14.68% and 13.90% of the total citations, respectively. China's publication volume is in the middle, but only 8th in citation frequency and H-index (818 citations, H-index 16). We used the VOS viewer software to analyze and found that the keywords were mainly concentrated in four groups: "diagnosis-related","treatmentrelated"," prognosis-related"and"disease-related". From 2001 to 2021, the United States, Italy and the United Kingdom have the largest number of PVS related literature publications. There is still a certain gap between China and western countries in terms of the number and quality of literature publications. [ABSTRACT FROM AUTHOR]

Abstract Objective Recently, a novel host‐related index, the Host‐index (H‐index), including both inflammatory and nutritional markers, has been described and observed to stratify prognosis in patients with squamous cell carcinoma (SCC) of the oral cavity more accurately than other host‐related indexes This study aimed to investigate the prognostic performance of the H‐index using pretreatment blood tests in patients receiving up‐front surgery for SCC of the larynx. Methods This retrospective observational study included a multicenter series of consecutive patients with SCC of the larynx diagnosed between 1 January 2009 and 31 July 2018, whose pretreatment blood tests were available and included the parameters necessary for the calculation of neutrophil to lymphocyte ratio (NLR) and the H‐index. Their association with disease‐free survival (DFS) and overall survival (OS) was measured. Results A total of 231 patients were eligible for the present analysis (median [range] age, 68 [37‐96] years; 191 [82.7%] men). The median follow‐up was 73 months. In multivariable Cox proportional hazards regression models, increasing age (adjusted hazard ratio [aHR], 1.07 per year; 95% CI, 1.04‐1.09), advanced pT stage (aHR = 1.71 95% CI: 1.07‐2.71), and having close or positive surgical margins (aHR = 2.01; 95% CI: 1.21‐3.33) were significantly associated with poor OS. Among blood parameters, a higher neutrophil count was a strong predictor of both worse DFS (aHR for recurrence/death = 2.34; 95% CI: 1.24‐4.40) and OS (aHR for death = 2.67; 95% CI: 1.51‐4.71). Among inflammatory blood indexes, while NLR was not significantly associated with DFS or OS, patients with H‐index ≥8.37 showed a higher aHR for both recurrence/death (2.82; 95% CI: 1.65‐4.79) and death (2.22; 95% CI: 1.26‐3.89). Conclusion In conclusion, the present study confirms the prognostic value of pretreatment H‐index, an easily measurable inflammatory and nutritional index, in patients with SCC of the larynx. Level of Evidence III

The present study analyze the data regarding h-Indices and the number of citations in respect of Nobel Laureates in Chemistry and Economic Sciences extracted from Scopus and Google Scholar. The Pearson correlation and Spearman correlation have been used for analysis for all Nobel Laureates. Data from the profiles (Google Scholar and Scopus) are taken for the period 2014 to 2021 (30th Nov., 2021), and noble laureates from 2014-2021, during this period, 22 individuals have conferred the Nobel Prize in Chemistry while 15 economists were given the Nobel Prize in Economic Sciences. [ABSTRACT FROM AUTHOR]

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Purpose The goal of this paper is to examine the literature published on information literacy (IL) between 2017 and 2021 and reveal the most important trends in IL publication. Design/methodology/approach Scopus database was used to analyze specific aspects of publishing trends by looking at the literature indexed from 2017 to 2021 in the field of IL. Findings In 2017, there was a significant increase in the number of citations to IL-related literature. In addition to "Janes-Jang SM" and the "College and Research Libraries," they were both prolific authors and sources. Most articles were published in the Journal of Academic Librarianship (97) during this time period. The United States was the most generous donor. Research in the IL field has recently focused on "information literacy," "academic libraries," "library instruction," and "assessment." Originality/value Researchers can use the paper to learn about current trends in the literature on IL, as well as possible areas for further study, and it provides the names of the most productive authors, organizations, and countries, as well as the most popular IL keywords. [ABSTRACT FROM AUTHOR]

Background: A team of 3 scientometrists led by John Ioannidis published in 2020 an extensive and updated database (ca. 6.9 million researchers in 22 disciplines and 176 sub-disciplines), ordering them according to a composite bibliometric index that measures their whole trajectory (career-long) impact and their annual impact at year 2019. They reported the top 100,000 scientists (1.45% across all disciplinary fields) or the top 2% of each subfield discipline, thus publishing the ranking of ca. 150,000 researchers worldwide. Methods and findings: We filtered that information for the disciplinary and sub-disciplinary areas corresponding to Ecology and identified a total of 14 ecologists with residence in Chile that appear in either of those two worldwide rankings. We report their measured productivity as both whole trajectory (career-long) and as annual impact at year 2019. We attribute their high registered productivity to their training at the doctoral level in prestigious foreign universities, their academic positions in internationally recognized Chilean universities, and their participation in state-funded research centers of scientific excellence. Exceptions to the rule are presented. Conclusions: The 14 ecologists identified with the scientometric algorithm proposed by Ioannidis and coworkers include, but are not restricted, to the most cited ecologists in Chile. We put forth possible reasons for some puzzling omissions from these rankings. [ABSTRACT FROM AUTHOR]

Citations received from scientific articles published in recognized journals originate the calculation of the impact index of this means of dissemination. SCImago Journal & Country Rank is a free access platform on the Internet that provides indicator information on the quality, prestige and impact of scientific journals over three years. For this purpose, it uses the publications indexed in the Scopus database. In this research, a descriptive analysis has been made (through clusters) of the impact index in SJR journals from Latin American countries in the Top 20 of SJR 2019 with the indicators: H index, Total Docs. (2019), Total Docs. (3 years), Total Refs. (2019), Total Cites (3 years), Citable Docs. (3 years), Cites/Doc. (2 years), Ref./Doc. (2019); in order to analyze and compare them. First, information on the impact rate on SJR is presented. Then, the clusters formed between the SJR impact index and the mentioned indicators are shown. Although in the Rank SJR, the journals PECON (BR), RevMexAA (MX) and ETHE (CO) occupy the first three positions in that order, the first and third stand out in cluster 1 as the best scientific journals in the clusters formed. [ABSTRACT FROM AUTHOR]

Purpose: The academic success of ophthalmology fellows may be significantly impacted by their research engagement. Evaluating the research activity of fellows by subspecialty may provide insight into trends useful for prospective applicants. The objective of this study was to assess the research activity of ophthalmology fellows in the year 2023., Methods: Ophthalmology fellowship programs were compiled using the Association of University Professors of Ophthalmology and the American Society of Ophthalmic Plastic and Reconstructive Surgery websites. Program subspecialties were categorized as: Cornea and External Disease [CED]; Cornea, External Disease, and Refractive Surgery [CEDRS]; Glaucoma; Medical Retina [MR]; Neuro-Ophthalmology [NO]; Oculoplastics; Pediatric Ophthalmology [PO]; Surgical Retina [SR]; Uveitis; and Other. "Other" consisted of Oncology, Pathology, combined Oncology and Pathology fellowships. We identified current fellows using publicly available online information. Programs and fellows that did not have information available were excluded. Total publications, Hirsch index (h-index), and weighted-relative citation ration (w-RCR) were utilized as measures of research output, while total citations and mean-RCR (m-RCR) served as proxies for research impact. Duration of publishing was calculated using the years of the oldest and most recent publications. Statistical analysis was performed using Kruskal-Wallis H tests with an alpha value of .05., Results: A total of 373 fellows from 229 programs met our inclusion criteria. More than half of fellows were men (54.4%), and the most common degree type was MD (93.0%). Across all subspecialties, the median h-index was 3.0 (IQR = 4), m-RCR was .9 (IQR = 1.2) and w-RCR was 3.2 (IQR = 9.8). The median number of publications was six (IQR = 10, with 34 citations (IQR = 110) and 4 years of publishing (IQR = 6). We observed significant differences in h-index ( p  = .038), total publications ( p  < .001), and w-RCR ( p  = .028) by subspecialty., Conclusion: We observed significant differences in research output, but no differences in research impact by subspecialty. Overall, Uveitis and Oculoplastics fellows had higher research activity, while Medical Retina and Other fellows had the lowest. This data is pertinent to better understand the landscape of ophthalmology fellowship applications.

Recent literature has highlighted altered spinal-reflex excitability following acute lateral ankle sprain (ALAS), yet there is little information on the conduction velocity of spinal reflex pathways (CV-SRP) in these patients. Therefore, we aimed to investigate the effects of ALAS on the CV-SRP. We employed a cross-sectional study with two groups: ALAS (n = 30) and healthy controls (n = 30). The CV-SRP of the soleus, fibularis longus, and tibialis anterior was assessed using the H-index method. As secondary outcomes, H-reflex and M-wave latencies were assessed as well as acute symptoms including ankle swelling, pain, and self-reported ankle function. Separate group-by-limb ANOVA with repeated measures revealed a significant interaction for soleus CV-SRP (p < 0.001) and H-reflex latency (p < 0.001), showing significant slower CV-SRP and longer H-reflex latency in the involved limb of the ALAS group compared with both limbs in the control group. However, there was no significant interaction or main effect in any other ankle muscles (p > 0.05). A further correlation analysis showed a significant relationship between CV-SRP and acute symptoms, including ankle swelling (r = −0.37, p = 0.048) and self-reported ankle function (r = 0.44, p = 0.017) in ALAS patients. These results suggest a disrupted functionality of the afferent pathway and/or synaptic transmission following ALAS. Level of Evidence: 4.

Objective: Recently, a novel host‐related index, the Host‐index (H‐index), including both inflammatory and nutritional markers, has been described and observed to stratify prognosis in patients with squamous cell carcinoma (SCC) of the oral cavity more accurately than other host‐related indexes This study aimed to investigate the prognostic performance of the H‐index using pretreatment blood tests in patients receiving up‐front surgery for SCC of the larynx. Methods: This retrospective observational study included a multicenter series of consecutive patients with SCC of the larynx diagnosed between 1 January 2009 and 31 July 2018, whose pretreatment blood tests were available and included the parameters necessary for the calculation of neutrophil to lymphocyte ratio (NLR) and the H‐index. Their association with disease‐free survival (DFS) and overall survival (OS) was measured. Results: A total of 231 patients were eligible for the present analysis (median [range] age, 68 [37‐96] years; 191 [82.7%] men). The median follow‐up was 73 months. In multivariable Cox proportional hazards regression models, increasing age (adjusted hazard ratio [aHR], 1.07 per year; 95% CI, 1.04‐1.09), advanced pT stage (aHR = 1.71 95% CI: 1.07‐2.71), and having close or positive surgical margins (aHR = 2.01; 95% CI: 1.21‐3.33) were significantly associated with poor OS. Among blood parameters, a higher neutrophil count was a strong predictor of both worse DFS (aHR for recurrence/death = 2.34; 95% CI: 1.24‐4.40) and OS (aHR for death = 2.67; 95% CI: 1.51‐4.71). Among inflammatory blood indexes, while NLR was not significantly associated with DFS or OS, patients with H‐index ≥8.37 showed a higher aHR for both recurrence/death (2.82; 95% CI: 1.65‐4.79) and death (2.22; 95% CI: 1.26‐3.89). Conclusion: In conclusion, the present study confirms the prognostic value of pretreatment H‐index, an easily measurable inflammatory and nutritional index, in patients with SCC of the larynx. Level of Evidence: III [ABSTRACT FROM AUTHOR]

Introduction: The achievement of the Objectives of Sustainable Development is based, among others, on the consolidation of the scientific communities required for study and social intervention. Objective: This study characterizes the training, production and scientific impact of researchers specializing in environmental psychology in Colombia, based on the National System of Science, Technology, and Innovation in Colombia. Materials and methods: The products registered on the Colciencias platform (now the Colombian Ministry of Sciences) were retrieved through structured information searches; Based on these, the profiles of 36 researchers were identified. Results: Researchers' graduate academic background is diverse and focuses on education, social sciences, and psychology; however, most of their dissertations are not in these fields. About academic publications, the research specialization index shows low participation of environmental psychology in total publications, as well as a small general impact, according to the H specialized index (1, 2, and no calculation in 99 % of cases). It is possible to identify a recurrent group of researchers in all the estimations. Conclusions: Results are discussed considering the institutionalization of environmental psychology in Colombia through interdisciplinary relations, emphasizing environmental education. [ABSTRACT FROM AUTHOR]

Aquaculture diversity is universally considered one of the main aspects that make aquaculture different from land animal farming. A retrospective analysis on 68 years of FAO data on world aquaculture production shows that this aquaculture diversity study is the most powerful and exhaustive theoretical tool to investigate aquaculture origin, evolution and connections with the surrounding world. Aquaculture diversity investigated with Shannon index and Pareto principle shows its thermodynamic nature and reveals an unexpectable regularity that sheds new light on aquaculture, thus putting aquaculture in a perfect theoretical context together with fisheries. Species dominance, vicariance and redundancy must be considered for a functional description of aquaculture diversity. Aquaculture diversity is not biological diversity as an aquaculture species is not necessarily a biological species. Aquaculture diversity shows that aquaculture is a modern colonization of aquatic domain and it has recently reached its maximum value that is 428 ± 11 species, of which 29 ± 1 will produce 80% of global annual production. A temporal and geographical analysis of global aquaculture diversity reveals an original and hopefully enlightening vision of modern aquaculture and its perspectives. [ABSTRACT FROM AUTHOR]

Numbers of citations of outstanding conference papers (OCPs) of IEEE Nuclear and Space Radiation Effects Conferences (NSRECs) from 1966 to 2017 are compared with citations of the most highly cited papers (HCPs) of the corresponding special issues of the IEEE TRANSACTIONS ON NUCLEAR SCIENCE (TNS), as well as average numbers of citations and cumulative $h$ index, $h_{\mathrm {cum}}$ , for all TNS papers published in the same year. 85% of NSREC OCPs are cited at a higher rate than the average for all TNS articles in that year. 55% of NSREC OCP citation totals are higher than $h_{\mathrm {cum}}$ for TNS in that year; these rank among the ~8% most highly cited TNS papers for that year. In ~10% of cases, the NSREC OCP is also the most HCP. Similarly high citation impact is found for papers nominated as candidates for OCPs. Radiation effects papers published in annual NSREC special issues comprise a significant fraction of all TNS articles cited $h_{\mathrm {cum}}$ times or more. These results support the use of $h_{\mathrm {cum}}$ as a metric of citation impact in this work and show that the NSREC OCP process generally meets awards criteria guidelines for impact. Potential reasons for variations in citation rates are discussed, and recommendations are provided to enhance the awards process. [ABSTRACT FROM AUTHOR]

This study investigates the research performance of the Iraqi public and private universities using the Scopus citation database. The investigation consists of three stages. The first stage includes the registration of these universities in the database. The second represents the process of merging the multiple accounts of each university. The two stages have been completed within one year (from start to end of 2017), which result in a significant improvement in the research performance, in term of number of published articles (Pu), number of citations (C) and h index. Analysis of the improved h index obtained from the Scopus site, reveals a clear bias towards large universities, due to neglecting the number of researchers (NS) in calculating the h index. In the third stage, two new empirical equations are suggested for measuring research performance of universities. The first proposed equation predicts a modified h index as a function of Pu, C, and NS and implements to Iraqi universities and selected universities from other countries. The second proposed equation is a combination of three sub-indicators, namely: citations per article, articles per researcher, and percentage of non-cited articles. Discussion of results indicates that the developed equations eliminate the bias of the large universities over the small ones and highlight some useful recommendations for the universities to enhance their ranking in scientific performance. [ABSTRACT FROM AUTHOR]

The h index has been comprehensively developed and diffusely applied following its initial proposal in 2005 by Jorge Hirsch. However, while the numbers of papers and authors measured continue to grow, it is not known whether such increases in quantity mean that the research itself is advancing. Accordingly, the present study sets out to establish an analysis method, based on the concept of entropy, with which to elucidate the evolution of the h index. The results suggest that there are four stages, as follows: the emerging stage, the preliminary growth stage, the real growth stage, and the maturity stage. Meanwhile, the research of the h index is found to be in flux, and it is concluded that further development of the metric will require profound theoretical achievements as well as embedded innovation, or else the evolution of the h index will decline following a shortened maturity stage. [ABSTRACT FROM AUTHOR]

Copyright of Revista Española de Documentación Científica is the property of Consejo Superior de Investigaciones Cientificas and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In the past 1 years, the amount of published paper of CSSCI core journals and economic management journals in china has declined abnormally, which may reduce the effective information of academic journals. This paper proposes to use the new diffusion factor, the number of keywords per article, and the number of articles to standardize and then harmonize the average to reflect the information density of the journal and also proposes the journal information density factor index. It then comprehensively uses the statistical methods of correlation coefficient, regression analysis and independent sample t test to verify the indicators. The results show that the issue of academic journals' information density should be paid more attention; the journal information density factor is a good evaluation index, which is not related to the impact factor, positively correlated with the h index and publishing capacity, and obeys the normal distribution. And the design of periodical evaluation index should have the function of dynamic control. [ABSTRACT FROM AUTHOR]

After referring to the abundant, severe, and accurate criticisms received by the first version of the Ranking de visibilidad e impacto de revistas científicas españolas de Humanidades y Ciencias Sociales con sello de calidad Fecyt (published in September 2019), a review of the changes introduced in the new version (January 2020) is provided. This piece continues to reflect on the flimsy foundations in which this ranking is based, and counters the arguments offered by its authors to defend its suitability. Potential harmful effects of this new ranking on the ecosystem of Spanish scientific journals in the areas of Social Sciences and Humanities are described. Lastly, the text concludes by pointing out that the design approach of this ranking is old and obsolete, as it is based on measuring the impact of containers (journals) instead of the impact of the content itself (articles). [ABSTRACT FROM AUTHOR]

Urban rail stations play an important role in passenger distribution and connectivity intervals in the network. How to effectively and reasonably evaluate their importance in the network is the key to optimizing the urban rail network structure and reducing operational risks. Taking the site as the research object and considering the topology, passenger volume, and passenger flow correlation of the urban rail network, the index of citation index is used to define node importance metric based on the h-index. Furthermore, the method of calculating the importance degree of urban rail transit network nodes based on h-index is proposed. The validity of the method is verified by the data of Beijing urban rail network in 2016, and the results are compared with the existing central index based on the network topology characteristics. [ABSTRACT FROM AUTHOR]

Using the h-index and the total number of citations in (natural) sciences, techniques and humanities in this article the best 10 Croatian researchers is ranked. The list may be formed based on the h-index and the total number of citations, given in Web of Science, Scopus, Publish or Perish Program and Google Scholar. Data for the first 10 researchers are presented. Google Scholar is the most complete. Therefore, to define a single indicator, h-index calculated by Google Scholar may be a good and simple one. The author chooses the Google Scholar database as it is the broadest one.

The aim of this study is to investigate the scientific output of faculty members of Sari University in Agricultural Sciences and Natural Resources based on h index in Scopus citation. The study is a descriptive survey and method was citation analysis. The research population included all faculty members of Sari University in Agricultural Sciences and Natural Resources (N=126) and scientific productions indexed in the Scopus database, that has been analyzed by using SPSS software (version 21). Among faculty members with a professorship rating of 55.6%, 41.7% with a rank of associate professors, 44.4% had an associate professor with an H index. The highest amount of scientific production was in 2007; also, highest research age of faculty members was 16 years old. The faculty of crop sciences with 19 has the most faculty members indexed in Scopus database. Faculty of animal science and fisheries has 18, faculty of natural science has 17, faculty of agricultural engineering has 12, and faculty of basic science with 4 members in Scopus database has the fewest members. In conclusion, to raise the h index, faculty members must be encouraged and supported to present articles in credible citation databases, research budgets must be increased, training courses must be conducted for writing ISI articles, validated databases and scientific journals, and high impact coefficients for improving science production must be introduced.

Scientificity is a comprehensive expression that identifies the scientific contribution of an academician or a scientist to the literature. There are some determinants accepted for establishing the scientificity. The h-index is one of the already using indicators for the detection of a contributor's scientific level. In this editorial, we focused on to explain the h-index and its necessity.

Concerns exist that neurosurgery might fail to lead the field of endovascular surgical neuroradiology (ESN), as other specialties are allowed to train and practice ESN. This study aimed to assess the current breakdown of specialties and their relative academic productivity in accredited ESN fellowship programs. A list of fellowship programs was obtained from the Accreditation Council for Graduate Medical Education and Committee on Advanced Subspecialty Training directories. Primary specialty (i.e., residency) training for each faculty member in these programs was determined using information provided by the programs. A bibliometric search was performed for each member using Web of Science (Clarivate Analytics, Philadelphia, Pennsylvania, USA). Cumulative and ESN-specific h indices were calculated; h indices were compared between each specialty group and between international medical graduates and US medical graduates, regardless of specialty training. Thirty-one ESN fellowship programs with 88 faculty members were included. Neurosurgeons constituted 61.4% (n = 54) of the total ESN faculty, followed by radiologists with 30.7% (n = 27), and neurologists with 7.9% (n = 7). The mean ESN-specific h index for neurosurgery-trained ESN faculty was 16.2 ± 14.6 compared with 14.4 ± 10.9 for radiologists and 13.0 ± 12.6 for neurologists (P = 0.76). There were 12 IMGs and 76 USMGs. The mean ESN-specific h index was greater for IMGs than USMGs, 24.7 ± 14.3 versus 14.0 ± 12.7 (P = 0.008), respectively. Neurosurgery is leading the ESN field in numbers; however, the h index is not significantly different among ESN faculty based on primary training. The number of IMGs is relatively small, yet IMGs have significantly higher mean h indices. [ABSTRACT FROM AUTHOR]

Copyright of Contaduría y Administración is the property of Facultad de Contaduria y Administracion-Universidad Nacional Autonoma de Mexico and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This paper develops an empirically validated theoretical model of a researcher's publication goal to assess which standardisations and policies are more likely to achieve equity and efficiency in different disciplines. The main theoretical insight is that there is a trade-off between equity and efficiency, as well as between networking activity and knowledge-diffusion activity. The main empirical insight is that, in order to achieve equity and efficiency, the original version of the H index should be replaced by a version that is standardised per author and per year and calculated by excluding reciprocal citations and publications other than peer-reviewed articles. [ABSTRACT FROM AUTHOR]

Collaboration among researchers plays an important role in scientific discoveries, especially in multidisciplinary research. How to allocate credit reasonably to coauthors of a paper is a long-standing problem in the science of sciences. The collective credit allocation method (CCA method) proposed by Shen, H. W. and Barabási, A. L. provides a novel view to solve this problem, which measures the coauthors' contribution to a paper based on the citation process by the scientific community. Nevertheless, the existing collective allocation method assigns equal weights to citing papers, which is sensitive to the malicious manipulation. In this paper, we propose a nonlinear collective credit allocation method (NCCA method) that assigns different strength to citing papers according to papers' scientific impact when measuring papers' similarity. Compared to the CCA method, we find that the NCCA method assigns more credits to Nobel laureates in the Nobel-winning papers. Moreover, the NCCA method is robust against random perturbations and the malicious manipulation in both Nobel-prize papers and ordinary papers. Furthermore, the collective credit allocation method can also modify h index. [ABSTRACT FROM AUTHOR]

Research impact is very important in academia. This study explored the research impact of faculty in doctoral higher education programs through the use of Hirsch's h index as measured by Google Scholar results. Characteristics of the h index in this field are discussed, and norms are offered for professors of different ranks. We also explore relationships between gender, experience, and U.S. News and World Report ranking and the index. We find that gender has no significant relationship to faculty index in this field, but faculty experience and school rankings do have a relationship. Our findings support the use of the h index in assessing research impact in the higher education field, and they may be of interest to persons beyond this field as we consider the manner in which we assess faculty research. [ABSTRACT FROM AUTHOR]

Objective Spinal surgery is taught and practiced within 2 different surgical disciplines, neurological surgery and orthopedic surgery. We have provided a unified analysis of academic productivity measured using the h -index attributable to spine-focused faculty at U.S. residency programs. Methods A total of 278 Accreditation Council for Graduate Medical Education training programs were assessed to identify 923 full-time faculty members with a spinal surgery designation, as defined by spine fellowship training or case volume >75% in spine surgery. The faculty were assessed with respect to academic rank, duration of practice in years, and academic productivity (h -index). Results The comparison showed a significantly greater mean h -index for neurological spine surgeons. The mean h -index for both disciplines increased significantly as faculty rank increased. Within the academic ranks of assistant and associate professor, neurological spine surgeons had significantly greater mean h -indexes. Neurological spine surgeons had a significantly lower practice duration. At all ranks except for assistant professor, the mean practice duration was not significantly different statistically between the neurological spine and orthopedic spine surgeons. A positive correlation between the h -index and practice duration was found for both spine surgical disciplines. The proportional odds models for neurological and orthopedic spine surgeons were moderately successful at predicting faculty rank according to the h -index. Conclusions We present a unified view of academic productivity as measured by the h -index among neurosurgical and orthopedic surgery spine faculty, with some noticeable differences. These results can be used for benchmark purposes to assess the relative productivity of its faculty and could be of interest to those pursuing academic opportunities in spine surgery. Highlights • Within spine surgery, neurosurgeons have a greater mean h -index. • For the rank of assistant and associate professor, neurosurgeons have a greater h -index. • The duration of practice was lower for neurosurgeons at the rank of assistant professor only. • The duration of practice and the h -index correlated positively for both specialties. • Faculty rank can be predicted for both specialties using the h -index. [ABSTRACT FROM AUTHOR]

Background: Radiation therapy is used to treat and control advanced ovarian cancer with spread to abdominal peritoneum. In this study, a comparison between various plans of radiation therapy within the abdomen and pelvis was performed in order to achieve an effective treatment response. Methods: Contouring and planning of 20 patients with CT-scan of the abdomen and pelvis were done by TiGRT software. In order to compare the different types of treatment planning for the selected site, some common criteria in radiotherapy and H-index were used. Findings: Among these methods, it was found that the two methods of anterior-posterior and lateral with 18 MV energy and same weight have same level of protection of organs at risk. While the tangent method do not produce a reasonable result. Moreover in anterior- posterior method can be shown that the changing in energy and beam weight give a various results from PTV covering and dose uniformity aspects. Conclusion: Among the various treatment planning were seen that AP/PA with AP = 6MV energy and weight 1, PA = 18 MV and weight 1.5, for covering whole abdomen give a better results.

This article proposes a comprehensive approach for assessing the quality and appropriateness of exploratory factor analysis solutions intended for item calibration and individual scoring. Three groups of properties are assessed: (a) strength and replicability of the factorial solution, (b) determinacy and accuracy of the individual score estimates, and (c) closeness to unidimensionality in the case of multidimensional solutions. Within each group, indices are considered for two types of factor-analytic models: the linear model for continuous responses and the categorical-variable-methodology model that treats the item scores as ordered-categorical. All the indices proposed have been implemented in a noncommercial and widely known program for exploratory factor analysis. The usefulness of the proposal is illustrated with a real data example in the personality domain. [ABSTRACT FROM AUTHOR]