Web of Science. Web of Science provides citation counts for articles indexed within it. It i ndexes over 10, journals in the arts, humanities, sciences, and social sciences. Scopus provide citation counts for articles indexed within it limited to article written in and after. It indexes o ver 15, journals from over 4, international publishers across the disciplines. Google Scholar. Google Scholar provides citation counts for articles found within Google Scholar.
Depending on the discipline and cited article, it may find more cited references than Web of Science or Scopus because overall, Google Scholar is indexing more journals and more publication types than other databases. Google Scholar is not specific about what is included in its tool but information is available on how Google obtains its content. Limiting searches to only publications by a specific author name is complicated in Google Scholar. Using Google Scholar Citations and creating your own profile will make it easy for you to create a list of publications included in Google Scholar.
Using your Google Scholar Citations account, you can see the citation counts for your publications and have GS calculate your h-index. You can also search Google Scholar by author name and the title of an article to retrieve citation information for a specific article.
But more importantly, citations to this paper have appeared in a large variety of journals in astrophysics, biology, cosmology, chemistry, earth sciences, geochemistry, and so on. Clarivate Analytics indexes are also comprehensive, providing complete coverage of all types of published source items—not just original research papers, review articles, and technical notes but also letters, corrections and retractions, editorials, and other items. Clarivate Analytics studies have shown that these latter items are important, have substantial impact, and provide useful links to scientific issues and controversies.
As stated at the outset and perhaps most importantly, Clarivate Analytics uniquely indexes the references cited by these source items. This gives you the ability to perform prospective as well as retrospective searches of the literature. Like other indexes, Clarivate Analytics databases allow you to move back in time to locate previously published papers.
But Clarivate Analytics databases uniquely allow you to move forward in time—to determine who has subsequently cited an earlier work. Thus, by starting with a single paper or book, you can identify whatever additional papers have referred to it. And each retrieved paper, in turn, may provide a new list of references with which to continue the citation search.
It is important to stress that the citation-based associations and connections within the literature are made by authors themselves. Traditional indexes typically rely on human subject specialists to categorize and describe papers, usually using controlled vocabularies or thesauri. Another shortcoming of human indexing is that there is an inevitable delay due to the time required to read or scan the papers and make subjective judgments about relevant descriptors.
In short, timeliness is reduced. In addition, due to the expense of human indexing, traditional indexes limit the number of terms. But in Clarivate Analytics citation indexes, all cited references are indexed. Since the typical research paper today contains from 25 to 35 references, the resulting number of index entries is correspondingly high.
Thanks to a suggestion by Chauncey Leake in the s, I conducted a thorough analysis of review articles and their cited references. By doing what today would be called context analysis, I soon discovered that the sentences in the review articles were actually detailed, descriptive indexing statements about papers or books they cited.
Hayne when we both were at Smith, Kline and French Labs in the s. Through large test samples, we concluded that the titles of papers cited in reviews and other articles were sufficient to add useful descriptive words and phrases to the citing paper. This was later confirmed in studies by A.
Harley, as Irv Sher and I recently reported 11, In , ISI now Clarivate Analytics was able to introduce this citation-based method of derivative algorithmic subject indexing, called KeyWords Plus 7,8. These KeyWords Plus terms are derived from the titles of cited papers, which have been algorithmically processed to identify the most-commonly recurring words and phrases.
The index is prepared utilizing the association of ideas existing between the cited and the citing articles, as the fact is that whenever a recent paper cites a previous paper there always exists a relation of ideas, between the two papers.
Examples of Citation Index. Citation indexes have proved to be better than the other indexes and can be prepared without many complications. They are also amenable to computer manipulation.
Citation indexing provides subject access to bibliographic records in an indirect but powerful manner. Lastly, note that there is a check box on the left side of each line. If you decide you are interested in seeing what the journal article's are that cited a particular Yankelovich entry book or article , click that box on.
Later, when you have finished noting what you want to see, you will click the " SEARCH " button, " to find articles that cite selected reference. As it turns out, it does: You can see that there are a variety of entries that resemble our book, Coming to Public Judgement. Why the differences? Well, ISI hires staff members to input this information directly from the new journal articles going into the ISI database, with no "authority control" work being done. So, if an author's name is spelled out with a middle initial in one journal article, but without in another, that is the what the staff members of ISI use in inputting the author's name.
If an author makes a mistake on citing Yankolovich's book, saying it was published in , that is what the ISI staffers will use. Notice, if you will, that on this page alone, ISI has what looks like the Coming to Public Judgement book as being published in , , and !
And we haven't even looked at the next page, where there are probably more entried indicating some more journal articles that were citing Yankelovich's book, Coming to Public Judgement. Just be forewarned: ISI is very, very bad about quality control over its entries.
Without looking on page 4 to see if there are more entries referring to the Yankelovich book, lets now decide what entries we wish to have the ISI system work with for us.
As you can see below, we have clicked on 8 entries, one of which was clearly the usually-used or "correct" format of citing this book: it was used 28 times. At any rate, we have indicated that we wish for ISI to show us 35 journal article records that all have cited the Yankelovich book, Coming to Public Judgement. When we do that, this is the beginning results page that ISI gives us: These article titles may each be clicked on to reveal, in many cases, an abstract of the article, as well as all of its citations, as well as whether other later journal article authors have cited it: Of course, the more recent the article is, the less likely it is going to have been cited already!
0コメント