From July 2011 have provided an automatically-calculated h-index and within their own profile. 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. This article is about the index of scientific research impact. 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. 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. The h-index serves as an alternative to more traditional journal metrics in the evaluation of the impact of the work of a particular researcher. As these metrics are percentages, they are intended to give a qualitative description to supplement the quantitative h-index.
First we order the values of f from the largest to the lowest value. 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. Journal of the American Society for Information Science and Technology. Just do your best to be a good communicator and move on! It was found that the distribution of the h-index, although it depends on the field, can be normalized by a simple rescaling factor. Biochemical and Biophysical Research Communications.
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. The index works properly only for comparing scientists working in the same field; citation conventions differ widely among different fields. 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. Subscription-based databases such as and the provide automated calculators. . 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. Harzing's Publish or Perish program calculates the h-index based on entries.
Hi, To provide a more secure and pleasant fashion experience at hm. Scientists with high h 2 upper percentages are perfectionists, whereas scientists with high h 2 lower percentages are mass producers. This improvement can enhance the measurement sensitivity of the H-index. It is possible to try the predictions using an online tool. Archived from on 5 May 2010.
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. The index is designed to improve upon simpler measures such as the total number of citations or publications. For additional guidance, please refer to , located at the , or watch the. Discount offer combinable with sale and already reduced items. Network editors receive the H-Announce daily digest and choose relevant content to repost to their networks. Examples: a historic occasion — an X-Files episode.
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. An herb garden in a historical setting. Because only the most highly cited articles contribute to the h-index, its determination is a simpler process. No adjustments on prior purchases. If you need help, feel free to get in touch with us at 855-466-7467. Hirsch has demonstrated that h has high predictive value for whether a scientist has won honors like membership or the. The h-index is an that attempts to measure both the and of the of a or scholar.
Sign in Hi, To provide a more secure and pleasant fashion experience at hm. 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. For the economic measure, see. However, Hirsch noted that values of h will vary between different fields. Please note: Announcements are posted and distributed the same day they are moderated; however, daily digests are distributed the day after moderation. To redeem in-store, print or show this banner on your smartphone.
Journal of the American Society for Information Science and Technology. 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. One can be easily convinced that ranking in coauthorship networks should take into account both measures to generate a realistic and acceptable ranking. You attend a history class, not an history class. 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. Cannot be combined with guest designer collaborations or select special collections. However, this finding was contradicted by another study by Hirsch.