Google Scholar

Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. Released in beta in November 2004, the Google Scholar index includes most peer-reviewed online academic journals and books, conference papers, theses and dissertations, preprints, abstracts, technical reports, and other scholarly literature, including court opinions and patents.[1] While Google does not publish the size of Google Scholar's database, scientometric researchers estimated it to contain roughly 389 million documents including articles, citations and patents making it the world's largest academic search engine in January 2018.[2] Previously, the size was estimated at 160 million documents as of May 2014.[3] Earlier statistical estimate published in PLOS ONE using a Mark and recapture method estimated approximately 80–90% coverage of all articles published in English with an estimate of 100 million.[4] This estimate also determined how many documents were freely available on the web.

Google Scholar has been criticized for not vetting journals and including predatory journals in its index.[5]

Google Scholar
Google Scholar logo 2015
Type of site
Bibliographic database
OwnerGoogle
Websitescholar.google.com
RegistrationOptional
LaunchedNovember 20, 2004
Current statusActive

History

Google Scholar arose out of a discussion between Alex Verstak and Anurag Acharya,[6] both of whom were then working on building Google's main web index.[7][8] Their goal was to "make the world's problem solvers 10% more efficient"[9] by allowing easier and more accurate access to scientific knowledge. This goal is reflected in the Google Scholar's advertising slogan – "Stand on the shoulders of giants" – taken from a quote by holy Bernard of Chartres and is a nod to the scholars who have contributed to their fields over the centuries, providing the foundation for new intellectual achievements.

Scholar has gained a range of features over time. In 2006, a citation importing feature was implemented supporting bibliography managers (such as RefWorks, RefMan, EndNote, and BibTeX). In 2007, Acharya announced that Google Scholar had started a program to digitize and host journal articles in agreement with their publishers, an effort separate from Google Books, whose scans of older journals do not include the metadata required for identifying specific articles in specific issues.[10] In 2011, Google removed Scholar from the toolbars on its search pages,[11] making it both less easily accessible and less discoverable for users not already aware of its existence. Around this period, sites with similar features such as CiteSeer, Scirus, and Microsoft Windows Live Academic search were developed. Some of these are now defunct; although in 2016, Microsoft launched a new competitor, Microsoft Academic.

A major enhancement was rolled out in 2012, with the possibility for individual scholars to create personal "Scholar Citations profiles", public author profiles that are editable by authors themselves.[12] Individuals, logging on through a Google account with a bona fide address usually linked to an academic institution, can now create their own page giving their fields of interest and citations. Google Scholar automatically calculates and displays the individual's total citation count, h-index, and i10-index. According to Google, "three quarters of Scholar search results pages [...] show links to the authors' public profiles" as of August 2014.[12]

A feature introduced in November 2013 allows logged-in users to save search results into the "Google Scholar library", a personal collection which the user can search separately and organize by tags.[13] A metrics feature now supports viewing the impact of academic journals,[14] and whole fields of science, via the "metrics" button. This reveals the top journals in a field of interest, and the articles generating these journal's impact can also be accessed.

Features and specifications

Google Scholar allows users to search for digital or physical copies of articles, whether online or in libraries.[15] It indexes "full-text journal articles, technical reports, preprints, theses, books, and other documents, including selected Web pages that are deemed to be 'scholarly.'"[16] Because many of Google Scholar's search results link to commercial journal articles, most people will be able to access only an abstract and the citation details of an article, and have to pay a fee to access the entire article.[16] The most relevant results for the searched keywords will be listed first, in order of the author's ranking, the number of references that are linked to it and their relevance to other scholarly literature, and the ranking of the publication that the journal appears in.[17]

Using its "group of" feature, it shows the available links to journal articles. In the 2005 version, this feature provided a link to both subscription-access versions of an article and to free full-text versions of articles; for most of 2006, it provided links to only the publishers' versions. Since December 2006, it has provided links to both published versions and major open access repositories, but still does not cover those posted on individual faculty web pages; access to such self-archived non-subscription versions is now provided by a link to Google, where one can find such open access articles.

Through its "cited by" feature, Google Scholar provides access to abstracts of articles that have cited the article being viewed.[18] It is this feature in particular that provides the citation indexing previously only found in CiteSeer, Scopus, and Web of Science. Through its "Related articles" feature, Google Scholar presents a list of closely related articles, ranked primarily by how similar these articles are to the original result, but also taking into account the relevance of each paper.[19]

Google Scholar's legal database of US cases is extensive. Users can search and read published opinions of US state appellate and supreme court cases since 1950, US federal district, appellate, tax, and bankruptcy courts since 1923 and US Supreme Court cases since 1791.[18] Google Scholar embeds clickable citation links within the case and the How Cited tab allows lawyers to research prior case law and the subsequent citations to the court decision.[20] The Google Scholar Legal Content Star Paginator extension inserts Westlaw and LexisNexis style page numbers in line with the text of the case.[21]

Ranking algorithm

While most academic databases and search engines allow users to select one factor (e.g. relevance, citation counts, or publication date) to rank results, Google Scholar ranks results with a combined ranking algorithm in a "way researchers do, weighing the full text of each article, the author, the publication in which the article appears, and how often the piece has been cited in other scholarly literature".[17] Research has shown that Google Scholar puts high weight especially on citation counts[22] and words included in a document's title.[23] As a consequence, the first search results are often highly cited articles.

Limitations and criticism

  • Quality – Some searchers consider Google Scholar of comparable quality and utility to commercial databases.[24][25] The reviews recognize that its "cited by" feature in particular poses serious competition to Scopus and Web of Science. An early study, from 2007, limited to the biomedical field, found citation information in Google Scholar to be "sometimes inadequate, and less often updated".[26] The coverage of Google Scholar may vary by discipline compared to other general databases.[27]
  • Lack of screening for quality – Google Scholar strives to include as many journals as possible, including predatory journals, which "have polluted the global scientific record with pseudo-science, a record that Google Scholar dutifully and perhaps blindly includes in its central index."[28]
  • Coverage – Google Scholar does not publish a list of journals crawled or publishers included, and the frequency of its updates is uncertain. Bibliometric evidence suggests Google Scholar's coverage of the sciences and social sciences is competitive with other academic databases; however as of 2017, Scholar's coverage of the arts and humanities has not been investigated empirically and Scholar's utility for disciplines in these fields remains ambiguous.[29] Especially early on, some publishers did not allow Scholar to crawl their journals. Elsevier journals have been included since mid-2007, when Elsevier began to make most of its ScienceDirect content available to Google Scholar and Google's web search.[30] As of February 2008, the absentees still included the most recent years of the American Chemical Society journals. It is, therefore, impossible to know how current or exhaustive searches are in Google Scholar, although a recent study[4] estimates that Google Scholar can find almost 90% (approximately 100 million) of all scholarly documents on the Web written in English. Large-scale longitudinal studies have found between 40–60% of scientific articles are available in full text via Google Scholar links.[31]
  • Matthew effect – Google Scholar puts high weight on citation counts in its ranking algorithm and therefore is being criticized for strengthening the Matthew effect;[22] as highly cited papers appear in top positions they gain more citations while new papers hardly appear in top positions and therefore get less attention by the users of Google Scholar and hence fewer citations.
  • Google Scholar effect – It is a phenomenon when some researchers pick and cite works appearing in the top results on Google Scholar regardless of their contribution to the citing publication because they automatically assume these works’ credibility and believe that editors, reviewers, and readers expect to see these citations.[32]
  • Incorrect field detection – Google Scholar has problems identifying publications on the arXiv preprint server correctly. Interpunctuation characters in titles produce wrong search results, and authors are assigned to wrong papers, which leads to erroneous additional search results. Some search results are even given without any comprehensible reason.[33][34]
  • Vulnerability to spam – Google Scholar is vulnerable to spam.[35][36] Researchers from the University of California, Berkeley and Otto-von-Guericke University Magdeburg demonstrated that citation counts on Google Scholar can be manipulated and complete non-sense articles created with SCIgen were indexed from Google Scholar.[37] They concluded that citation counts from Google Scholar should only be used with care especially when used to calculate performance metrics such as the h-index or impact factor. Google Scholar started computing an h-index in 2012 with the advent of individual Scholar pages. Several downstream packages like Harzing's Publish or Perish also use its data.[38] The practicality of manipulating h-index calculators by spoofing Google Scholar was demonstrated in 2010 by Cyril Labbe from Joseph Fourier University, who managed to rank "Ike Antkare" ahead of Albert Einstein by means of a large set of SCIgen-produced documents citing each other (effectively an academic link farm).[39]
  • Inability to shepardize case law – As of 2010, Google Scholar was not able to shepardize case law, as Lexis can.[40]

Search engine optimization for Google Scholar

Search engine optimization (SEO) for traditional web search engines such as Google has been popular for many years. For several years, SEO has also been applied to academic search engines such as Google Scholar.[41] SEO for academic articles is also called "academic search engine optimization" (ASEO) and defined as "the creation, publication, and modification of scholarly literature in a way that makes it easier for academic search engines to both crawl it and index it".[41] ASEO has been adopted by organizations such as Elsevier,[42] OpenScience,[43] Mendeley,[44] and SAGE Publishing[45] to optimize their articles' rankings in Google Scholar. ASEO has negatives.[37]

See also

References

  1. ^ "Search Tips: Content Coverage". Google Scholar. Retrieved 27 April 2016.
  2. ^ Gusenbauer, Michael (2018-11-10). "Google Scholar to overshadow them all? Comparing the sizes of 12 academic search engines and bibliographic databases". Scientometrics. 118: 177–214. doi:10.1007/s11192-018-2958-5. ISSN 0138-9130.
  3. ^ Orduña-Malea, E., Ayllón, J. M., Martín-Martín, A., & Delgado López-Cózar, E. (2015). Methods for estimating the size of Google Scholar. Scientometrics104(3), 931–49. ArXiv
  4. ^ a b Trend Watch (2014) Nature 509(7501), 405 – discussing Madian Khabsa and C Lee Giles (2014) The Number of Scholarly Documents on the Public Web, PLOS ONE 9, e93949.
  5. ^ Kolata, Gina (30 October 2017). "Many Academics Are Eager to Publish in Worthless Journals". The New York Times. Retrieved 2 November 2017.
  6. ^ Giles, J. (2005). "Science in the web age: Start your engines". Nature. 438 (7068): 554–55. Bibcode:2005Natur.438..554G. doi:10.1038/438554a. PMID 16319857.
  7. ^ Hughes, Tracey (December 2006). "An interview with Anurag Acharya, Google Scholar lead engineer". Google Librarian Central.
  8. ^ Assisi, Francis C. (3 January 2005). "Anurag Acharya Helped Google's Scholarly Leap". INDOlink. Archived from the original on 2011-06-08. Retrieved 2007-04-19.
  9. ^ Steven Levy (2015) The gentleman who made Scholar. "Back channel" on Medium.
  10. ^ Quint, Barbara (August 27, 2007). "Changes at Google Scholar: A Conversation With Anurag Acharya". Information Today.
  11. ^ Madrigal, Alexis C. (3 April 2012). "20 Services Google Thinks Are More Important Than Google Scholar". Atlantic.
  12. ^ a b Alex Verstak: "Fresh Look of Scholar Profiles". Google Scholar Blog, August 21, 2014
  13. ^ James Connor: "Google Scholar Library". Google Scholar Blog, November 19, 2013
  14. ^ "International Journal of Internet Science – Google Scholar Citations". Retrieved 2014-08-22.
  15. ^ Google Scholar Library Links
  16. ^ a b Vine, Rita (January 2006). "Google Scholar". Journal of the Medical Library Association. 94 (1): 97–99. PMC 1324783.
  17. ^ a b "About Google Scholar". Retrieved 2010-07-29.
  18. ^ a b "Google Scholar Help".
  19. ^ Official Google Blog: Exploring the scholarly neighborhood
  20. ^ Dreiling, Geri (May 11, 2011). "How to Use Google Scholar for Legal Research". Lawyer Tech Review.
  21. ^ "Google Scholar Legal Content Star Paginator". Retrieved 2011-06-06.
  22. ^ a b Jöran Beel and Bela Gipp. Google Scholar's Ranking Algorithm: An Introductory Overview. In Birger Larsen and Jacqueline Leta, editors, Proceedings of the 12th International Conference on Scientometrics and Informetrics (ISSI'09), vol. 1, pp. 230–41, Rio de Janeiro, July 2009. International Society for Scientometrics and Informetrics. ISSN 2175-1935.
  23. ^ Beel, J.; Gipp, B. (2009). Google Scholar's ranking algorithm: The impact of citation counts (An empirical study). 2009 Third International Conference on Research Challenges in Information Science. pp. 439–46. doi:10.1109/RCIS.2009.5089308. ISBN 978-1-4244-2864-9.
  24. ^ Bauer, Kathleen; Bakkalbasi, Nisa (September 2005). "An Examination of Citation Counts in a New Scholarly Communication Environment". D-Lib Magazine. 11 (9). doi:10.1045/september2005-bauer.
  25. ^ Kulkarni, A. V.; Aziz, B.; Shams, I.; Busse, J. W. (2009). "Comparisons of Citations in Web of Science, Scopus, and Google Scholar for Articles Published in General Medical Journals". JAMA: The Journal of the American Medical Association. 302 (10): 1092–96. doi:10.1001/jama.2009.1307. PMID 19738094.
  26. ^ Falagas, M. E.; Pitsouni, E. I.; Malietzis, G. A.; Pappas, G. (2007). "Comparison of PubMed, Scopus, Web of Science, and Google Scholar: Strengths and weaknesses". The FASEB Journal. 22 (2): 338–42. doi:10.1096/fj.07-9492LSF. PMID 17884971.
  27. ^ Kousha, K.; Thelwall, M. (2007). "Google Scholar citations and Google Web/URL citations: A multi-discipline exploratory analysis". Journal of the American Society for Information Science and Technology. 57 (6): 1055–65. doi:10.1002/asi.20584.
  28. ^ Beall, Jeffrey (November 2014). "Google Scholar is Filled with Junk Science". Scholarly Open Access. Archived from the original on 2014-11-07. Retrieved 2014-11-10.
  29. ^ Fagan, Jody (2017). "An evidence-based review of academic web search engines, 2014–2016: Implications for librarians' practice and research agenda". Information Technology and Libraries. 36: 7–47.
  30. ^ Brantley, Peter (3 July 2007). "Science Direct-ly into Google". O'Reilly Radar. Archived from the original on 21 April 2008.
  31. ^ Martín-Martín, Alberto; Orduña-Malea, Enrique; Ayllón, Juan Manuel; Delgado López-Cózar, Emilio (2014-10-30). "Does Google Scholar contain all highly cited documents (1950–2013)?". arXiv:1410.8464 [cs.DL].
  32. ^ Serenko, A.; Dumay, J. (2015). "Citation classics published in knowledge management journals. Part II: Studying research trends and discovering the Google Scholar Effect" (PDF). Journal of Knowledge Management. 19 (6): 1335–55. doi:10.1108/JKM-02-2015-0086.
  33. ^ Jacso, Peter (24 September 2009). "Google Scholar's Ghost Authors, Lost Authors, and Other Problems". Library Journal. Archived from the original on 7 June 2011.
  34. ^ Péter Jacsó (2010). "Metadata mega mess in Google Scholar". Online Information Review. 34: 175–91. doi:10.1108/14684521011024191.
  35. ^ On the Robustness of Google Scholar against Spam
  36. ^ Scholarly Open Access – Did A Romanian Researcher Successfully Game Google Scholar to Raise his Citation Count? Archived 2015-01-22 at the Wayback Machine
  37. ^ a b Beel, Joeran; Gipp, Bela (December 2010). "Academic search engine spam and google scholar's resilience against it". Journal of Electronic Publishing. 13 (3). doi:10.3998/3336451.0013.305.
  38. ^ "Publish or Perish". Anne-Wil Harzing.com. Retrieved 2013-06-15.
  39. ^ Labbe, Cyril (2010). "Ike Antkare one of the great stars in the scientific firmament" (PDF). Laboratoire d'Informatique de Grenoble RR-LIG-2008 (technical report). Joseph Fourier University.
  40. ^ Oliver Benn (March 9, 2010). "Is Google Scholar a Worthy Adversary?". Law Technology News.
  41. ^ a b Beel, Jöran; Gipp, Bela; Wilde, Erik (2010). "Academic Search Engine Optimization (ASEO)". Journal of Scholarly Publishing. 41 (2): 176–90. doi:10.3138/jsp.41.2.176.
  42. ^ "Get found – optimize your research articles for search engines".
  43. ^ "Why and how should you optimize academic articles for search engines?".
  44. ^ "Academic SEO – Market (And Publish) or Perish". 2010-11-29.
  45. ^ "Help Readers Find Your Article". 2015-05-19.

Further reading

External links

Actual malice

Actual malice in United States law is a legal requirement imposed upon public officials or public figures when they file suit for libel (defamatory printed communications). Unlike other individuals who are less well-known to the general public, public officials and public figures are held to a higher standard for what they must prove before they may succeed in a defamation lawsuit.

Ajay K. Sood

Ajay Kumar Sood (born 26 June 1951) is an Indian physicist, researcher and holder of 2 US and 5 Indian patents, known for his pioneering research findings on graphene and nanotechnology. He is a Distinguished Honorary Professor of Physics at Indian Institute of Science, Bangalore. The Government of India honoured him in 2013, with the Padma Shri, the fourth highest civilian award, for his contributions to the fields of science and technology. Sood was elected a Fellow of the Royal Society (FRS) in 2015.

Citation index

A citation index is a kind of bibliographic index, an index of citations between publications, allowing the user to easily establish which later documents cite which earlier documents. A form of citation index is first found in 12th-century Hebrew religious literature. Legal citation indexes are found in the 18th century and were made popular by citators such as Shepard's Citations (1873). In 1960, Eugene Garfield's Institute for Scientific Information (ISI) introduced the first citation index for papers published in academic journals, first the Science Citation Index (SCI), and later the Social Sciences Citation Index (SSCI) and the Arts and Humanities Citation Index (AHCI). The first automated citation indexing was done by CiteSeer in 1997. Other sources for such data include Google Scholar and Elsevier's Scopus.

CiteSeerX

CiteSeerx (originally called CiteSeer) is a public search engine and digital library for scientific and academic papers, primarily in the fields of computer and information science. CiteSeer holds a United States patent # 6289342, titled "Autonomous citation indexing and literature browsing using citation context," granted on September 11, 2001. Stephen R. Lawrence, C. Lee Giles, Kurt D. Bollacker are the inventors of this patent assigned to NEC Laboratories America, Inc. This patent was filed on May 20, 1998, which has its roots (Priority) to January 5, 1998. A continuation patent was also granted to the same inventors and also assigned to NEC Labs on this invention i.e. US Patent # 6738780 granted on May 18, 2004 and was filed on May 16, 2001. CiteSeer is considered as a predecessor of academic search tools such as Google Scholar and Microsoft Academic Search. CiteSeer-like engines and archives usually only harvest documents from publicly available websites and do not crawl publisher websites. For this reason, authors whose documents are freely available are more likely to be represented in the index.

CiteSeer's goal is to improve the dissemination and access of academic and scientific literature. As a non-profit service that can be freely used by anyone, it has been considered as part of the open access movement that is attempting to change academic and scientific publishing to allow greater access to scientific literature. CiteSeer freely provided Open Archives Initiative metadata of all indexed documents and links indexed documents when possible to other sources of metadata such as DBLP and the ACM Portal. To promote open data, CiteSeerx shares its data for non-commercial purposes under a Creative Commons license.The name can be construed to have at least two explanations. As a pun, a 'sightseer' is a tourist who looks at the sights, so a 'cite seer' would be a researcher who looks at cited papers. Another is a 'seer' is a prophet and a 'cite seer' is a prophet of citations. CiteSeer changed its name to ResearchIndex at one point and then changed it back.

Department of Chemistry, University of Cambridge

The Department of Chemistry at the University of Cambridge is the chemistry department of the University of Cambridge. It was formed from a merger in the early 1980s of two separate departments that had moved into the Lensfield Road building decades earlier: the Department of Physical Chemistry (originally led by Professor Ronald Norrish FRS, Nobel Laureate; the department was previously located near the Old Cavendish in Free School Lane - see photo) and the Department of Chemistry (that included theoretical chemistry and which was led by Lord Alexander R. Todd FRS, Nobel Laureate) respectively. Research interests in the department cover a broad of chemistry ranging from molecular biology to geophysics. The department is located on the Lensfield Road, next to the Panton Arms on the South side of Cambridge. As of 2015 the department is home to around 200 postdoctoral research staff, over 250 postgraduate students, around sixty academic staff.

Emerging Infectious Diseases

Emerging Infectious Diseases (EID) is an open-access, peer-reviewed journal published by the Centers for Disease Control and Prevention (CDC). EID is a public domain journal and covers global instances of new and reemerging infectious diseases, putting greater emphasis on disease emergence, prevention, control, and elimination. According to Journal Citation Reports, the journal's 2016 impact factor is 6.99, ranking it 4th out of 82 journals in the infectious disease category. The journal also has a 2016 Google Scholar h5-index score of 79, ranking it 2nd in both the epidemiology category and among open-access epidemiological journals, as well as 4th in the communicable diseases category and 1st among open-access communicable disease journals.

Google Dataset Search

Google Dataset Search is a search engine from Google that helps researchers locate online data that is freely available for use. The company launched the service on September 5, 2018, and stated that the product was targeted at scientists and data journalists.

Google Dataset Search complements Google Scholar, the company's search engine for academic studies and reports.

H-index

The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. 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. The index can also be applied to the productivity and impact of a scholarly journal as well as a group of scientists, such as a department or university or country. The index was suggested in 2005 by Jorge E. Hirsch, a physicist at UC San Diego, as a tool for determining theoretical physicists' relative quality and is sometimes called the Hirsch index or Hirsch number.

KBibTeX

KBibTeX is a reference management software primarily for BibTeX which is typically used in conjunction with TeX/LaTeX. Beyond normal editing capabilities, KBibTeX offers features such as searching and importing new references from Google Scholar or BibSonomy.

KBibTeX is by KDE framework but is not part of the official KDE Software Compilation or Calligra. There exist two versions of KBibTeX: One that is built on KDE Platform 4, and another built on KDE Frameworks 5. The online version of documentation to KBibTeX is hosted on KDE documentation server along with a copy in PDF form for the purpose of offline reading.

Legal malpractice

Legal malpractice is the term for negligence, breach of fiduciary duty, or breach of contract by a lawyer during the provision of legal services that causes harm to a client.

Microsoft Academic

Microsoft Academic is a free public web search engine for academic publications and literature, developed by Microsoft Research. Re-launched in 2016, the tool features an entirely new data structure and search engine using semantic search technologies. It currently indexes over 375 million entities, 170 million of which are academic papers. The Academic Knowledge API offers information retrieval from the underlying database using REST endpoints for advanced research purposes.The service replaces the earlier Microsoft research project, Microsoft Academic Search, which ended development in 2012.Preliminary reviews by bibliometricians suggest the new Microsoft Academic Search is a competitor to Google Scholar, Web of Science, and Scopus for academic research purposes as well as citation analysis.

Motor vehicle exception

The motor vehicle exception is a legal rule in the United States that modifies the normal probable cause requirement of the Fourth Amendment to the United States Constitution and, when applicable, allows a police officer to search a motor vehicle without a search warrant.

Physical Review Letters

Physical Review Letters (PRL), established in 1958, is a peer-reviewed, scientific journal that is published 52 times per year by the American Physical Society. As also confirmed by various measurement standards, which include the Journal Citation Reports impact factor and the journal h-index proposed by Google Scholar, many physicists and other scientists consider Physical Review Letters to be one of the most prestigious journals in the field of physics.PRL is published as a print journal, and is in electronic format, online and CD-ROM. Its focus is rapid dissemination of significant, or notable, results of fundamental research on all topics related to all fields of physics. This is accomplished by rapid publication of short reports, called "Letters". Papers are published and available electronically one article at a time. When published in such a manner, the paper is available to be cited by other work. The Lead Editor is Hugues Chaté. The Managing Editor is Reinhardt B. Schuhmann.

Rajiah Simon

Rajiah Simon, is a Professor of Physics at the Institute of Mathematical Sciences, Chennai, India.

Rajiah Simon received the Shanti Swarup Bhatnagar Prize for Science and Technology in 1993 for pioneering work in Quantum optics.

Simon and collaborators initiated the "Quantum theory of charged-particle beam optics",

by working out the focusing action of a magnetic quadrupole using the Dirac Equation.

For his other publications, see his Google Scholar profile.

ResearchGate

ResearchGate is a social networking site for scientists and researchers to share papers, ask and answer questions, and find collaborators. According to a study by Nature and an article in Times Higher Education, it is the largest academic social network in terms of active users, although other services have more registered users and more recent data suggests that almost as many academics have Google Scholar profiles.While reading articles does not require registration, people who wish to become site members need to have an email address at a recognized institution or to be manually confirmed as a published researcher in order to sign up for an account. Members of the site each have a user profile and can upload research output including papers, data, chapters, negative results, patents, research proposals, methods, presentations, and software source code. Users may also follow the activities of other users and engage in discussions with them. Users are also able to block interactions with other users.

The site has been criticized for sending unsolicited email invitations to coauthors of the articles listed on the site that were written to appear as if the email messages were sent by the other coauthors of the articles (a practice the site said it has discontinued as of November 2016) and for automatically generating apparent profiles for non-users who have sometimes felt misrepresented by them. A study found that over half of the uploaded papers appear to infringe copyright, because the authors uploaded the publisher's version.

Scirus

Scirus was a comprehensive science-specific search engine, first launched in 2001. Like CiteSeerX and Google Scholar, it was focused on scientific information. Unlike CiteSeerX, Scirus was not only for computer sciences and IT and not all of the results included full text. It also sent its scientific search results to Scopus, an abstract and citation database covering scientific research output globally. Scirus was owned and operated by Elsevier.

In 2013 an announcement appeared, on the Scirus homepage, announcing the site's retirement in 2014:

"We are sad to say goodbye. Scirus is set to retire in early 2014. An official retirement date will be posted here as soon as it is determined. To ensure a smooth transition, we are informing you now so that you have sufficient time to find an alternative search solution for science-specific content. Thank you for being a devoted user of Scirus. We have enjoyed serving you."By February 2014, the Scirus homepage indicated that the service was no longer running.

Shopkeeper's privilege

Shopkeeper's privilege is a law recognized in some parts of the United States under which a shopkeeper is allowed to detain a suspected shoplifter on store property for a reasonable period of time, so long as the shopkeeper has cause to believe that the person detained in fact committed, or attempted to commit, theft of store property.

Trade dress

Trade dress is a legal term of art that generally refers to characteristics of the visual appearance of a product or its packaging (or even the design of a building) that signify the source of the product to consumers. Trade dress is a form of intellectual property.

Tuomas Eerola

Tuomas Eerola is professor in Music Cognition at Durham University. He studied at the University of Jyväskylä from where he received his MA in Music in 1997, and his PhD in Musicology in 2003. His research focuses on music and emotion. He has over 100 publications that can be accessed from Google Scholar.. He has been awarded major research grants from Academy of Finland to study the appeal of sad music, from Economic and Social Research Council to explore the tagging of emotions in music, and Arts and Humanities Research Council (as a co-PI) to study the interpersonal entrainment in music performance

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