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Welcome to Scopus Training by : Arash Nikyar arashnikyar@yahoo.com June 2014. Facts & figures. Scopus is the largest abstract and citation database of peer-reviewed literature, features smart tools to track, analyze research
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Welcome to Scopus Training by : ArashNikyararashnikyar@yahoo.comJune 2014
Facts & figures • Scopus is the largest abstract and citation database of peer-reviewed literature, features smart tools to track, analyze research • 21,000 titles from more than 5,000 international publishers in the fields of science, technology, medicine, social sciences and arts and humanities
Over 21,000 titles from more than 5,000international publishers Including the coverage of : • 20,874 peer-reviewed journals (including 2,800 open access journals) • 367 trade publications • 30,000 books • Extensive conference coverage (5.5 million conference papers) • "Articles-in-Press" from more than 3,750 journals and publishers
The 53 million records on Scopus include: • 32 million records, including references, going back to 1995 (84% include abstracts). • 21 million pre-1996 records going back as far as 1823. • Scopus also cross-searches 24 million patents from five patent offices: (US Patent & Trademark Office, European Patent Office, Japan Patent Office, World Intellectual Property Organization and the UK Intellectual Property Office).
Search Options & Refinements Search Forms: • Advanced Search • Author • Affiliation
Search Refinements Refinement Categories: • Title • Author • Affiliation • Year • Subject Area • Keywords
Identify subject experts with Author Identifier • Track citations over time for a set of authors or documents, with Citation Overview/Tracker View h-index for specific authors • Analyze an author's publishing output with Author Evaluator • Gain insight into journal performance with journal analyzer and alternative journal impact metrics SNIP and SJR Identifying and Analysis tools
The Author Identifier & Evaluator Author searching with enhanced accuracy to help users reach author-specific information more quickly and efficiently. Challenges: • Many authors share the same name. • Author names can vary in the way they are formatted. Solution: • Author Identifier distinguishes between these author names, it gives each author a separate ID and groups together all the documents written by that author.
How Does the Author Identifier Work? Scopus uses a sophisticated algorithm which recognizes authors based on various data elements associated with the article:
h-Index The index is a Performance Measurement Tool for Scientific Authors (similar idea to journal impact factors but for individuals) Established by Jorge Hirsch at UC San Diego who stated that: “A scientist has index h if h of his/her Np papers have at least h citations each, and the other (Np- h) papers have no more than h citations each.” Source: Hirsch, J. E. (2005, September 29). An index to quantify an individual’s scientific research output. Retrieved from: http://arxiv.org/abs/physics/0508025
What is the h-index? • Rates a scientist’s performance based on their career publications, as measured by the lifetime number of citations each article receives. • Depends on both quantity (number of publications) and quality (number of citations) of a scientist’s publications. • The h-index lists all publications in descending orderby the number citations received to date.
SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
How is the h-index different from the Impact Factor? • The main difference is that the h-index refers to the performance of an individual scientist. The Impact Factor refers to the average performance of all articles in a journal. • The h-index is based on lifetime citations received by a scientist’s articles. The Impact Factor is based on only 2-year’s worth of citations. • Both rankings measure the average performance, of an individual scientist or a journal. Some articles will receive many more citations, and some fewer, than the ranking figure.
Advantages & Disadvantages of the h-index Advantages: • Takes into accounts both productivity and quality of a scientist’s publications, and so can distinguish between truly influential scientists, those who just publish many papers, and one-shot wonders. • Insensitive to a set of uncited or lowly cited papers, so that the impact of a scientist’s high quality output is not diluted by papers that have performed poorly for whatever reason. • Does not necessarily penalise a scientist with a short career, since the h-index can be similar for scientists with different numbers of papers.
Advantages & Disadvantages of the h-index Disadvantages: • Insensitive to one or several very highly cited papers. • h-index is not independent of time, since a scientist’s h-index can never be greater than the number of papers they have published in their career. • A high h-index is not always a reliable indicator of high personal achievement. • The h-index cannot decrease with time, and so cannot be used to detect declining research output or retirement.
SJR is a measure of the scientific prestige of scholarly sources: value of weighted citations per document. SCImago Journal Rank (SJR)
SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field. Source Normalized Impact per Paper (SNIP)
