Papers of interest to Sig Metrics
Eugene Garfield
eugene.garfield at THOMSONREUTERS.COM
Tue Oct 25 16:43:17 EDT 2011
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TITLE: DO COUNTRIES WITH LOWER SELF-CITATION RATES PRODUCE
HIGHER IMPACT PAPERS? OR, DOES HUMILITY PAY? (Article, English)
AUTHOR: Jaffe, K
SOURCE: INTERCIENCIA 36 (9). SEP 2011. p.694-698 INTERCIENCIA,
CARACAS
SEARCH TERM(S): CITATION item_title; CITATION* item_title
KEYWORDS+: SCIENCE; MACRO
ABSTRACT: Studying the 62 countries producing most papers reported
in the SCImago data base in the period 1996-2008, it was found that countries with low per capita publication numbers show variable rates of self-citations and produce publications with lower citation impact. In contrast, countries with larger numbers of citations per paper have also high per capita publication numbers and their researchers appear to be humbler, showing lower rates of country and author self-citations.
Notable exceptions are China, USA and Iran, which show abnormally high country self-citation rates, partially explained respectively by large populations, large total number of publications and language barriers. An increase of self-citation rates in almost all countries during the last decade, calls for exploring science policies that increase international scientific impact, such as more international cooperation, and science education with broader outlooks.
AUTHOR ADDRESS: K Jaffe, Univ Simon Bolivar, Dept Biol Organismos, Apdo
89000, Caracas 1080, Venezuela
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TITLE: Empirical test of the origin of Zipf's law in growing
social networks (Article, English)
AUTHOR: Zhang, QZ; Sornette, D
SOURCE: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 390
(23-24). NOV 1 2011. p.4124-4130 ELSEVIER SCIENCE BV,
AMSTERDAM
SEARCH TERM(S): ZIPF* item_title; PHYSICA A source_abbrev_20
KEYWORDS: Zipf's law; Gibrat's law
ABSTRACT: Zipf's power law is a general empirical regularity found
in many systems. We report a detailed analysis of a burgeoning network of social groups, in which all ingredients needed for Zipf's law to apply are verifiable and verified. A recently developed theory predicts that Zipfs law corresponds to systems that are growing according to a maximally sustainable path in the presence of random proportional growth, stochastic birth and death processes. We estimate empirically the average growth r and its standard deviation a as well as the death rate h and predict without adjustable parameters the exponent mu of the power law distribution P(s) of the group sizes s. Using numerical simulations of the underlying growth model, we demonstrate that the empirical stability of Zipfs law over the whole lifetime of the social network can be attributed to the interplay between a finite lifetime effect and a large a value. Our analysis and the corresponding results demonstrate that Zipf's law can be observed with a good precision even when the balanced growth condition is not realized, if the random proportional growth has a strong stochastic component and is acting on young systems under development. (C) 2011 Elsevier B.V. All rights reserved.
AUTHOR ADDRESS: D Sornette, ETH, Chair Entrepreneurial Risks, Dept
Management Technol & Econ, CH-8092 Zurich, Switzerland
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TITLE: Formal versus self-organised knowledge systems: A network
approach (Article, English)
AUTHOR: Masucci, AP
SOURCE: PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS 390
(23-24). NOV 1 2011. p.4652-4659 ELSEVIER SCIENCE BV,
AMSTERDAM
SEARCH TERM(S): DESOLLAPRICE DJ rauth; PRICE DJD rauth;
PHYSICA A source_abbrev_20
KEYWORDS: Directed acyclic graph; Scale-free networks; Formal
system; Citation; Topological ordering
KEYWORDS+: SIZE
ABSTRACT: In this work, we consider the topological analysis of
symbolic formal systems in the framework of network theory. In particular, we analyse the network extracted by Principia Mathematica of B. Russell and AN. Whitehead, where the vertices are the statements and two statements are connected with a directed link if one statement is used to demonstrate the other one. We compare the obtained network with other directed acyclic graphs, such as a scientific citation network and a stochastic model. We also introduce a novel topological ordering for directed acyclic graphs and we discuss its properties with respect to the classical one. The main result is the observation that formal systems of knowledge topologically behave similarly to self-organised systems. (C)
2011 Elsevier B.V. All rights reserved.
AUTHOR ADDRESS: AP Masucci, IFISC CSIC UIB, E-07122 Palma de Mallorca, Spain
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TITLE: How honest is the h-index in measuring individual
research output? (Letter, English)
AUTHOR: Patro, BK; Aggarwal, AK
SOURCE: JOURNAL OF POSTGRADUATE MEDICINE 57 (3). JUL-SEP 2011.
p.264-265 MEDKNOW PUBLICATIONS, MUMBAI
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005;
GARFIELD E JAMA-J AM MED ASSOC 295:90 2006;
KEYWORDS+: IMPACT FACTOR
AUTHOR ADDRESS: BK Patro, PGIMER, Sch Publ Hlth, Dept Community Med,
Chandigarh, India
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TITLE: Bibliometric indicators: a snapshot of the scientific
productivity of leading European PRM researchers (Article, English)
AUTHOR: Franchignoni, F; Lasa, SM; Ozcakar, L; Ottonello, M
SOURCE: EUROPEAN JOURNAL OF PHYSICAL AND REHABILITATION MEDICINE
47 (3). SEP 2011. p.455-462 EDIZIONI MINERVA MEDICA,
TURIN
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005;
BIBLIOMETR* item_title
KEYWORDS: Bibliometrics; Rehabilitation; Publications
KEYWORDS+: WEB-OF-SCIENCE; H-INDEX; GOOGLE-SCHOLAR; REHABILITATION-
MEDICINE; RESEARCH PERFORMANCE; HIRSCH-INDEX; JOURNALS;
SCOPUS; IMPACT; OUTPUT
ABSTRACT: Aim. The aim of this paper was to explore the validity
and practical usefulness of a set of bibliometric indicators with a focus on the scientific production of influential European researchers in Physical and Rehabilitation Medicine (PRM).
Methods. We randomly selected 24 European PRM specialists from the list of invited lecturers or chairpersons at the 17(th) ESPRM Congress in 2010. Using the time window 1996-2010, we recorded the number of papers published, total number of citations, and h-index from Web of Science
(WoS) and Publish or Perish (PoP) databases. We also noted the journals in which the papers were published. Ranking the 24 authors into two groups according to higher vs. lower research productivity, we compared the frequency of Editorial Board membership of at least one of the 5 most influential journals in PRM.
Results. Median values (WoS, PoP) for papers, citations, and h-index were
respectively: (31, 46); (171, 317); and (6.5, 8.5). High correlations were found among different indicators, and also between the same indicators calculated in the two different databases. However, the Bland- Altman plot indicated that the two databases could not be considered interchangeable. Twelve PRM specialists were Editorial Board members: 11 of them were in the first 10 ranking positions for at least one of the 6 indicators analysed.
Conclusion. There is need to better understand the characteristics of bibliometric indicators and we retain that the information they provide is insufficiently valid to justify their use as the sole objective criterion for career assessment.
AUTHOR ADDRESS: F Franchignoni, Fdn Salvatore Maugeri, IRCCS, Clin Lavoro &
Riabilitaz, Unit Occupat Rehabil & Ergon,Rehabil Inst
Veruno, Via Revislate 13, I-28010 Novara, Italy
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