Biochemical and Biophysical Research Communications. Hirsch has demonstrated that h has high predictive value for whether a scientist has won honors like membership or the. This article is about the index of scientific research impact. First we order the values of f from the largest to the lowest value. Offer subject to change or expire without notice. In contrast, if the same publications have 25, 8, 5, 3, and 3, then the index is 3 because the fourth paper has only 3 citations. 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.
These Tax Advisors have advanced training covering Military specific tax laws and the preparation of Military tax returns. 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. Because only the most highly cited articles contribute to the h-index, its determination is a simpler process. Investment Income Investment Income certified Tax Advisors are knowledgeable in the preparation of tax returns with various types of investment income. However, Hirsch noted that values of h will vary between different fields. Just enter your current password to continue. Journal of the American Society for Information Science and Technology.
This method has not been readily adopted, perhaps because of its complexity. For the economic measure, see. The h-index is intended to measure simultaneously the quality and quantity of scientific output. Tax, title, and license not included. Discount offer combinable with sale and already reduced items. 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.
Hi, To provide a more secure and pleasant fashion experience at hm. It was found that the distribution of the h-index, although it depends on the field, can be normalized by a simple rescaling factor. 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. As these metrics are percentages, they are intended to give a qualitative description to supplement the quantitative h-index. 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. Military Military certified Tax Advisors have successfully completed the Block Advisors certification program focusing on the unique tax situations encountered by Military personnel and their families. 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.
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. 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. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications. A detailed study showed that the Web of Science has strong coverage of journal publications, but poor coverage of high impact conferences. The index is designed to improve upon simpler measures such as the total number of citations or publications.
However, this finding was contradicted by another study by Hirsch. 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. 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. Each database is likely to produce a different h for the same scholar, because of different coverage. For example, the Meho and Yang study found that Google Scholar identified 53% more citations than Web of Science and Scopus combined, but noted that because most of the additional citations reported by Google Scholar were from low-impact journals or conference proceedings, they did not significantly alter the relative ranking of the individuals. We also have pre-owned options at our. Total number of papers does not account for the quality of scientific publications, while total number of citations can be disproportionately affected by participation in a single publication of major influence for instance, methodological papers proposing successful new techniques, methods or approximations, which can generate a large number of citations , or having many publications with few citations each.
Among 36 new inductees in the National Academy of Sciences in biological and biomedical sciences in 2005, the median h-index was 57. Attorney Attorneys are Tax Advisors who have received state certifications to practice law. May not be redeemed for cash or cash equivalent and is not transferable. Harzing's Publish or Perish program calculates the h-index based on entries. . These Tax Advisors have completed advanced training covering the various investment options and how the income, gains, and losses from these investments impact current and future year tax situations. Thus, the true predictability of future h-index is much lower compared to what has been claimed before.
It is possible to try the predictions using an online tool. Tax, title, and license not included. 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. This improvement can enhance the measurement sensitivity of the H-index. When compared with a video creator's total view count, the h-index and g-index better capture both productivity and impact in a single metric.