query: instance_of impact factor
supports: Broadly, a citation is a reference to a published or unpublished source (not always the original source). More precisely, a citation is an abbreviated alphanumeric expression embedded in the body of an intellectual work that denotes an entry in the bibliographic references section of the work for the purpose of acknowledging the relevance of the works of others to the topic of discussion at the spot where the citation appears. Generally the combination of both the in-body citation and the bibliographic entry constitutes what is commonly thought of as a citation (whereas bibliographic entries by themselves are not). References to single, machine-readable assertions in electronic scientific articles are known as nanopublications, a form of microattribution. Annual publications, more often called simply annuals, are periodical publications appearing regularly once per year. Although exact definitions may vary, types of annuals include: Calendars and almanacs, directories, yearbooks, annual reports, proceedings and transactions, and literary annuals. A weekly or monthly publication may produce an "Annual" featuring similar materials to the regular publication. Some encyclopedias have published annual supplements that essentially summarize the news of the past year, similar to some newspaper yearbooks. A review article is an article that summarizes the current state of understanding on a topic. A review article surveys and summarizes previously published studies, rather than reporting new facts or analysis. Review articles are sometimes also called survey articles or, in news publishing, overview articles. Academic publications that specialize in review articles are known as review journals. The impact factor ( IF ) of an academic journal is a measure reflecting the average number of citations to recent articles published in that journal . It is frequently used as a proxy for the relative importance of a journal within its field , with journals with higher impact factors deemed to be more important than those with lower ones . The impact factor was devised by Eugene Garfield , the founder of the Institute for Scientific Information . Impact factors are calculated yearly starting from 1975 for those journals that are indexed in the Journal Citation Reports . Eugene Garfield (born September 16, 1925) is an American linguist and businessman, one of the founders of bibliometrics and scientometrics. Journal Citation Reports (JCR) is an annual publication by Clarivate Analytics (previously the Intellectual Property and Science business of Thomson Reuters). It has been integrated with the Web of Science and is accessed from the Web of Science-Core Collections. It provides information about academic journals in the sciences and social sciences, including impact factors. The "JCR" was originally published as a part of "Science Citation Index". Currently, the "JCR", as a distinct service, is based on citations compiled from the "Science Citation Index Expanded" and the "Social Science Citation Index". Thomson Reuters Corporation is a multinational mass media and information firm with operational headquarters at 3 Times Square in Manhattan, New York City. The firm was founded in Toronto, Ontario, Canada, where its legal domicile offices are located at 333 Bay Street in Downtown Toronto. Thomson Reuters shares maintain a dual listing on the New York Stock Exchange (NYSE: TRI) and the Toronto Stock Exchange (TSX: TRI). The Science Citation Index (SCI) is a citation index originally produced by the Institute for Scientific Information (ISI) and created by Eugene Garfield. It was officially launched in 1964. It is now owned by Clarivate Analytics (previously the Intellectual Property and Science business of Thomson Reuters). The larger version (Science Citation Index Expanded) covers more than 8,500 notable and significant journals, across 150 disciplines, from 1900 to the present. These are alternatively described as the world's leading journals of science and technology, because of a rigorous selection process. Web of Science (previously known as Web of Knowledge) is an online subscription-based scientific citation indexing service originally produced by the Institute for Scientific Information (ISI), now maintained by Clarivate Analytics (previously the Intellectual Property and Science business of Thomson Reuters), that provides a comprehensive citation search. It gives access to multiple databases that reference cross-disciplinary research, which allows for in-depth exploration of specialized sub-fields within an academic or scientific discipline. Scientometrics is the study of measuring and analysing science, technology and innovation. Major research issues include the measurement of impact, reference sets of articles to investigate the impact of journals and institutes, understanding of scientific citations, mapping scientific fields and the production of indicators for use in policy and management contexts. In practice there is a significant overlap between scientometrics and other scientific fields such as bibliometrics, information systems, information science and science of science policy. Reference is a relation between objects in which one object designates, or acts as a means by which to connect to or link to, another object. The first object in this relation is said to "refer to" the second object. The second object, the one to which the first object refers, is called the "referent" of the first object. An academic or scholarly journal is a periodical publication in which scholarship relating to a particular academic discipline is published. Academic journals serve as permanent and transparent forums for the presentation, scrutiny and discussion of research. They are usually peer-reviewed or refereed. Content typically takes the form of articles presenting original research, review articles, and book reviews. The purpose of an academic journal, according to the first editor of the world's oldest academic journal Henry Oldenburg, is to give researchers a venue to "impart their knowledge to one another, and contribute what they can to the Grand design of improving natural knowledge, and perfecting all Philosophical Arts, and Sciences." Henry Oldenburg (also Henry Oldenbourg) (c. 1619 as Heinrich Oldenburg  5 September 1677) was a German theologian known as a diplomat, a natural philosopher and as the creator of scientific peer review. He was one of the foremost intelligencers of Europe of the seventeenth century, with a network of correspondents to rival those of Fabri de Peiresc, Marin Mersenne and Ismaël Boulliau. At the foundation of the Royal Society he took on the task of foreign correspondence, as the first Secretary. Bibliometrics is statistical analysis of written publications, such as books or articles. Bibliometric methods are frequently used in the field of library and information science, including scientometrics. For instance, bibliometrics are used to provide quantitative analysis of academic literature or for evaluating budgetary spending. Citation analysis is a commonly used bibliometric method which is based on constructing the citation graph, a network or graph representation of the citations between documents. Many research fields use bibliometric methods to explore the impact of their field, the impact of a set of researchers, or the impact of a particular paper. Bibliometrics also has a wide range of other applications, such as in descriptive linguistics, the development of thesauri, and evaluation of reader usage. The Institute for Scientific Information (ISI) was founded by Eugene Garfield in 1960. It was acquired by Thomson Scientific & Healthcare in 1992, and became known as Thomson ISI. It is now a part of the Intellectual Property & Science business of Thomson Reuters.
candidates: 1975 academic discipline academic journal annual publication bibliometrics century citation combination corporation cross editor field foundation founder headquarters information institute intellectual property journal mass may measurement network news newspaper object part peer presentation process production property publication publishing reference relation review article scholarship science september society square state stock exchange study technology understanding work year
answer: bibliometrics