H&m sminke. h 2020-01-09

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The h-index is intended to measure simultaneously the quality and quantity of scientific output. It is possible to try the predictions using an online tool. A detailed study showed that the Web of Science has strong coverage of journal publications, but poor coverage of high impact conferences. It has been stated that citation behavior in general is affected by field-dependent factors, which may invalidate comparisons not only across disciplines but even within different fields of research of one discipline. During the period January 1, 2000 — February 28, 2010, a physicist had to receive 2073 citations to be among the most cited 1% of physicists in the world. The exclusion of conference proceedings papers is a particular problem for scholars in , where conference proceedings are considered an important part of the literature.

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It was introduced in July 2011 by as part of their work on. Scopus has better coverage of conferences, but poor coverage of publications prior to 1996; Google Scholar has the best coverage of conferences and most journals though not all , but like Scopus has limited coverage of pre-1990 publications. However, Hirsch noted that values of h will vary between different fields. The three h 2 metrics measure the relative area within a scientist's citation distribution in the low impact area, h 2 lower, the area captured by the h-index, h 2 center, and the area from publications with the highest visibility, h 2 upper. Scientists with high h 2 upper percentages are perfectionists, whereas scientists with high h 2 lower percentages are mass producers. However, later work has shown that since h-index is a cumulative measure, it contains intrinsic auto-correlation that led to significant overestimation of its predictability. This method has not been readily adopted, perhaps because of its complexity.

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Thus, the true predictability of future h-index is much lower compared to what has been claimed before. The index can also be applied to the productivity and impact of a as well as a group of scientists, such as a department or university or country. Archived from on 5 May 2010. The h-index has been applied to Internet Media, such as channels. It has been suggested that in order to deal with the sometimes wide variation in h for a single academic measured across the possible citation databases, one should assume false negatives in the databases are more problematic than false positives and take the maximum h measured for an academic.

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For the economic measure, see. Journal of the American Society for Information Science and Technology. First we order the values of f from the largest to the lowest value. Your inbox is about to get a lot more stylish! The index is designed to improve upon simpler measures such as the total number of citations or publications. Therefore, these disciplines have lower citation thresholds in the Essential Science Indicators, with the lowest citation thresholds observed in social sciences 154 , computer science 149 , and multidisciplinary sciences 147. On average across the disciplines, a professor in the social sciences had an h-index about twice that of a lecturer or a senior lecturer, though the difference was the smallest in geography. A value of about 18 could mean a full professorship, 15—20 could mean a fellowship in the , and 45 or higher could mean membership in the.

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Please keep in mind that under the official rules for Publishers Clearing House there are geographic limitations to entry into our promotions, contests and giveaways. Each database is likely to produce a different h for the same scholar, because of different coverage. As these metrics are percentages, they are intended to give a qualitative description to supplement the quantitative h-index. Because only the most highly cited articles contribute to the h-index, its determination is a simpler process. A scientific institution has a successive Hirsch-type-index of i when at least i researchers from that institution have an h-index of at least i. Unfortunately at this time we are unable to process international online transactions.

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Subscription-based databases such as and the provide automated calculators. Of course this method does not deal with academic age bias. Biochemical and Biophysical Research Communications. It might be simpler to divide citation counts by the number of authors before ordering the papers and obtaining the h-index, as originally suggested by Hirsch. Hirsch has demonstrated that h has high predictive value for whether a scientist has won honors like membership or the.

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However, this finding was contradicted by another study by Hirsch. Numbers are very different in social science disciplines: The Impact of the Social Sciences team at found that social scientists in the United Kingdom had lower average h-indices. For example, if we have a researcher with 5 publications A, B, C, D, and E with 10, 8, 5, 4, and 3 citations, respectively, the h-index is equal to 4 because the 4th publication has 4 citations and the 5th has only 3. . In addition, specific databases, such as the database can automatically calculate the h-index for researchers working in.

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The h-index is an that attempts to measure both the and of the of a or scholar. A successive Hirsch-type-index for institutions has also been devised. This improvement can enhance the measurement sensitivity of the h-index. We appreciate your interest in Publishers Clearing House. Among 36 new inductees in the National Academy of Sciences in biological and biomedical sciences in 2005, the median h-index was 57.