Papers of interest - SIG-Metrics readers
Eugene Garfield
eugene.garfield at THOMSONREUTERS.COM
Wed Jan 30 14:48:50 EST 2013
TITLE: An annual JCR impact factor calculation based on Bayesian
credibility formulas (Article, English)
AUTHOR: Perez-Hornero, P; Arias-Nicolas, JP; Pulgarin, AA;
Pulgarin, A
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.1-9 ELSEVIER
SCIENCE BV, AMSTERDAM
SEARCH TERM(S): MACROBERTS MH rauth;
IMPACT FACTOR* item_title;
GARFIELD E SCIENCE 122:108 1955;
GARFIELD E SCIENTOMETRICS 1:359 1979
KEYWORDS: Credibility factor; Impact factor; Posterior impact;
Prior impact
KEYWORDS+: CITATION ANALYSIS; SCIENCE; INDICATORS
ABSTRACT: Our aim deals with appraising the annual impact
calculation of journals belonging to the JCR, in terms of the expected
citation (with or without selfcitations) by published paper in a range of
k-years. A Bayesian approach to the problem, should reflect not only the
current prestige of a journal, but also taking into account its recent
trajectory. In this wide context, credibility theory becomes an adequate
mechanism deciding whether journal's impact factor calculation to be more
or less plausible. Under prior belief that journal quality is determined
by its impact factor, we model the citation-quality process by choosing a
conjugated family of the exponential class in order to obtain a net
impact credibility formula. Proposed weighting schema produces the effect
of smoothing out any sudden increases or decreases in the year-by-year
impact factor. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: A Pulgarin, Univ Extremadura, Escuela Politecn, Dept
Matemat, Avda Univ S-N, Caceres 10071, Spain
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TITLE: Axiomatizing the Hirsch index: Quantity and quality
disjoined (Article, English)
AUTHOR: Miroiu, A
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.10-15
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: Scientific impact index; Hirsch index; Axiomatization;
Monotonicity
ABSTRACT: Scientific impact indexes like h are responsive to two
parameters: the researcher's productivity given by the number of her
published papers (an aspect of quantity) and citations (an aspect of
quality). In this paper I prove that the two parameters can be treated
separately: the index h can be axiomatized by appealing (1) only to
axioms that allow for productivity changes, but do not require taking
into account distinct situations in which a researcher's papers received
different numbers of citations or (2) only to axioms that allow for
changes in the number of citations received by the researcher's papers,
but do not require changes in scientific productivity. The axioms used
are weak. Specifically, monotonicity is avoided. (C) 2012 Elsevier Ltd.
All rights reserved.
AUTHOR ADDRESS: A Miroiu, Natl Sch Polit & Adm Studies, Dept Polit Sci,
Bucharest, Romania
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TITLE: Comparison of different mathematical functions for the
analysis of citation distribution of papers of individual authors
(Article, English)
AUTHOR: Sangwal, K
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.36-49
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): PRICE DJD rauth;
HIRSCH JE P NATL ACAD SCI USA 102:16569 2005;
SEGLEN PO J AM SOC INFORM SCI 43:628 1992;
CITATION item_title; CITATION* item_title
KEYWORDS: Adsorption isotherms; Citation analysis; Citation rank-
order distribution; Rank-frequency functions
KEYWORDS+: RANK-ORDER DISTRIBUTION; IMPACT FACTOR; HIRSCH-INDEX;
ICEBERG HYPOTHESIS; LAW; NETWORKS; BEHAVIOR; UNIVERSALITY;
PUBLICATION; STATISTICS
ABSTRACT: The citation distribution of papers of selected
individual authors was analyzed using five mathematical functions: power-
law, stretched exponential, logarithmic, binomial and Langmuir-type. The
former two functions have previously been proposed in the literature
whereas the remaining three are novel and are derived following the
concepts of growth kinetics of crystals in the presence of additives
which act as inhibitors of growth. Analysis of the data of citation
distribution of papers of the authors revealed that the value of the
goodness-of-the-fit parameter R-2 was the highest for the empirical
binomial relation, it was high and comparable for stretched exponential
and Langmuir-type functions, relatively low for power law but it was the
lowest for the logarithmic function. In the Langmuir-type function a
parameter K, defined as Langmuir constant, characterizing the citation
behavior of the authors has been identified. Based on the Langmuir-type
function an expression for cumulative citations L relating the
extrapolated value of citations l(0) corresponding to rank n = 0 for an
author and his/her constant K and the number N of paper receiving
citation l >= 1 is also proposed. (C) 2012 Elsevier Ltd. All rights
reserved.
AUTHOR ADDRESS: K Sangwal, Lublin Univ Technol, Dept Appl Phys, Ul
Nadbystrzycka 38, PL-20618 Lublin, Poland
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TITLE: Investigating the universal distributions of normalized
indicators and developing field-independent index (Article, English)
AUTHOR: Wu, J
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.63-71
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: g-Index; h-Index; Field independence; Universality; Power-
law distributions; Lognormal distributions
KEYWORDS+: HIRSCH-INDEX; H-INDEX; RESEARCHERS; AUTHORSHIP; IMPACT;
OUTPUT
ABSTRACT: Using the dataset based on Thomson Reuters Scientific
"Web of Science" the distributions of some well-known indicators, such as
h-index and g-index, were investigated, and different citation behaviors
across different scientific fields resulting from their field dependences
were found. To develop a field-independent index, two scaling methods,
based on average citation of subject category and journal, were used to
normalize the citation received by each paper of a certain author. The
distributions of the generalized h-indices in different fields were found
to follow a lognormal function with mean and standard deviation of
approximately -0.8 and 0.8, respectively. A field-independent index fi-
index was then proposed, and its distribution was found to satisfy a
universal power-law function with scaling exponent alpha approaching 3.0.
Both the power-law and the lognormal universality of the distributions
verified the field independence of these indicators. However, deciding
which of the scaling methods is the better one is necessary for the
validation of the field-independent index. (C) 2012 Elsevier Ltd. All
rights reserved.
AUTHOR ADDRESS: J Wu, Wuhan Univ, Sch Informat Management, Wuhan 430072,
Hubei, Peoples R China
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TITLE: Would it be possible to increase the Hirsch-index, pi-
index or CDS-index by increasing the number of publications or citations
only by unity? (Article, English)
AUTHOR: Vinkler, P
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.72-83
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005;
CITATION* item_title
KEYWORDS: Hirsch-index; pi-Index; CDS-index; Citations Self-
citations; Indicators
KEYWORDS+: H-INDEX; INDICATORS; IMPACT
ABSTRACT: The aim of the study is to explore the effects of the
increase in the number of publications or citations on several impact
indicators by a single journal paper or citation. The possible change of
the h-index, A-index, R-index, pi-index, pi-rate, Journal Paper Citedness
( JPC), and Citation Distribution Score (CDS) is followed by models.
Particular attention is given to the increase of the indices by a single
plus citation. The results obtained by the " successively built-up
indicator" model show that with increasing number of citations or self-
citations the indices may increase substantially. (C) 2012 Elsevier Ltd.
All rights reserved.
AUTHOR ADDRESS: P Vinkler, Hungarian Acad Sci, Res Ctr Nat Sci, POB 17,
H-1525 Budapest, Hungary
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TITLE: The proposal of a broadening of perspective in evaluative
bibliometrics by complementing the times cited with a cited reference
analysis (Article, English)
AUTHOR: Bornmann, L; Marx, W
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.84-88
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): GARFIELD E rauth;
KESSLER MM AM DOC 14:10 1963;
CITED item_title; BIBLIOMETR* item_title;
GARFIELD E JAMA-J AM MED ASSOC 295:90 2006
KEYWORDS: Citation impact; Normalized citation counts; Journal
impact factor; Cited references
KEYWORDS+: PREDICTIVE-VALIDITY; PUBLICATIONS; DIFFUSION; HISTORY
ABSTRACT: A proposal is made in this paper for a broadening of
perspective in evaluative bibliometrics by complementing the (standard)
times cited with a cited reference analysis for a fieldspecific citation
impact measurement. The times cited approach counts the citations of a
given publication set. In contrast, we change the perspective and start
by selecting all papers dealing with a specific research topic or field
(the example in this study is research on Aspirin). Then we extract all
cited references from the papers of this field-specific publication set
and analyse which papers, scientists, and journals have been cited most
often. In this study, we use the Chemical Abstracts registry number to
select the publications for a specific field. However, the cited
reference approach can be used with any other field classification system
proposed up to now. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: L Bornmann, Max Planck Gesell, Adm Headquarters, Div Sci &
Innovat Studies, Hofgartenstr 8, D-80539 Munich, Germany
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TITLE: The advantage of the use of samples in evaluative
bibliometric studies (Letter, English)
AUTHOR: Bornmann, L; Mutz, R
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.89-90
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): BIBLIOMETR* item_title; LETTER* doctype
AUTHOR ADDRESS: L Bornmann, Max Planck Gesell, Adm Headquarters, Div Sci &
Innovat Studies, Hofgartenstr 8, D-80539 Munich, Germany
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TITLE: Normalized Similarity Index: An adjusted index to
prioritize article citations (Article, English)
AUTHOR: Nassiri, I; Masoudi-Nejad, A; Jalili, M; Moeini, A
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.91-98
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S):
MARGOLIS J SCIENCE 155:1213 1967;
SMALL H J AM SOC INFORM SCI 24:265 1973;
SMALL H SCIENTOMETRICS 38:275 1997;
CITED ARTICLE abstract; CITATION* item_title;
GARFIELD E J INF SCI 30:119 2004
KEYWORDS: Bibliographic coupling; Co-citation; Citation network;
Similarity index; Weighted citation
KEYWORDS+: AUTHOR COCITATION ANALYSIS; NETWORKS; RETRIEVAL;
VISUALIZATION; PAGERANK; SCIENCE
ABSTRACT: One of the main applications of citation is to find
articles that are relevant to a particular article. However, not all
citations are equally relevant to the target article. This paper presents
an approach to identify the most relevant citation(s). To this end, the
Normalized Similarity Index (NSI) is proposed to quantify the similarity
between the source and target of a citation base on the co-citations and
references shared by them. To validate the method, NSI was calculated for
five citation networks and was compared with the peer review grades for
the relevancy between the source and the target articles. The results
showed a significant correlation between the NSI ranks and those of peer
review. Also, combined linkage (CL) and weighted direct citation (WDC)
were calculated from the same data. According to the results of
comparison between the NSI with other similarity measures, in most cases,
NSI did better than others at reproducing the peer rankings. Our
principal conclusion is that the NSI can be used to prioritize the
citations of given highly cited article, and represent knowledge flow
from the target article. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: I Nassiri, Univ Tehran, Inst Biochem & Biophys, Lab Syst
Biol & Bioinformat LBB, Tehran, Iran
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TITLE: A scientometric look at calendar events (Article, English)
AUTHOR: Magnone, E
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.101-108
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): SCIENTOMETRIC* item_title
KEYWORDS: Time series; ScienceDirect (R); Calendar Publication
regularity; High resolution analysis
KEYWORDS+: LUNAR CYCLES; TEMPERATURE; IMPACTS
ABSTRACT: Using an application of scientometric methodology to the
analysis of scientific communication, relationships between number of
submissions of scientific articles and calendar events (e.g., festive
seasons, weekend vacations, national public holidays, Chinese New Year,
Christmas) are examined quantitatively. With regard to the aim of
understanding the complexities of these relationships, the time series
include weekly, monthly, and seasonal variations on the basis of Received
Date as reported on the Article History of the Elsevier paper format.
Data records are collected during twenty-year ( 1990-2010) and one-year
periods - as case study - ended 31 December 2008. The analysis shows that
the overall submission rates are strongly influenced by calendar events.
(C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: E Magnone, Korea Inst Energy Res, High Efficiency & Clean
Energy Res Div, 152 Gajeong Ro, Taejon 305343, South Korea
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TITLE: An informetric model for the success-index (Article,
English)
AUTHOR: Franceschini, F; Galetto, M; Maisano, D; Mastrogiacomo, L
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.109-116
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S):
HIRSCH JE P NATL ACAD SCI USA 102:16569 2005;
INFORMETRIC* item_title;
GARFIELD E SCIENTOMETRICS 1:359 1979
KEYWORDS: Lotka's law; h-Index; success-Index; Information
production processes
KEYWORDS+: SOCIAL NETWORKS; CROWN INDICATOR; CITATIONS; JOURNALS
ABSTRACT: Based on an idea by Kosmulski, Franceschini et al. (2012,
Scientometrics 92( 3), 621-641) propose to classify a publication as
"successful" when it receives more citations than a specific comparison
term (CT). In the intention of the authors CT should be a suitable
estimate of the number of citations that a publication - in a certain
scientific context and period of time - should potentially achieve.
According to this definition, the success-index is defined as the number
of successful papers, among a group of publications examined, such as
those associated to a scientist or a journal. In the first part of the
paper, the success-index is recalled, discussing its properties and
limitations. Next, relying on the theory of Information Production
Processes (IPPs), an informetric model of the index is formulated, for a
better comprehension of the index and its properties. Particular emphasis
is given to a theoretical sensitivity analysis of the index. (C) 2012
Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: F Franceschini, Politecn Torino, DIGEP Dept Management &
Prod Engn, Corso Duca Abruzzi 24, I-10129 Turin, Italy
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TITLE: A probe into dynamic measures for h-core and h-tail
(Article, English)
AUTHOR: Chen, DZ; Huang, MH; Ye, FY
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.129-137
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: h-core; h-tail; Shape centroid; Shape descriptor; h-index;
k-index
KEYWORDS+: HIRSCH INDEX; IMPACT; DISTRIBUTIONS; CITATIONS
ABSTRACT: Using the concepts of h- core and h- tail, shape
descriptors and shape centroids, k-index and k ' - index, dynamic
measures are probed, with practical data in the fields of Physics and
sociology. It is revealed that there are obvious differences between
natural sciences ( Physics, particles & fields) and social sciences (
sociology) when c-descriptor, h- core centroid and index are applied as
dynamic measures, while few differences exist when using t-descriptor, h-
tail centroid and k ' - index, following a time span from 1 to 10 years.
(C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: FY Ye, Nanjing Univ, Sch Informat Management, Nanjing,
Peoples R China
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TITLE: First in, best dressed: The presence of order-effect bias
in journal ranking surveys (Article, English)
AUTHOR: Serenko, A; Bontis, N
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.138-144
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): JOURNAL item_title;
GARFIELD E SCIENCE 178:471 1972
KEYWORDS: Order-effect bias; Response-order effect; Journal ranking;
Survey
KEYWORDS+: MANAGEMENT; IMPACT; PERCEPTIONS; DISCOURSE; SCHOLARS;
QUALITY; FORUMS
ABSTRACT: The purpose of this study is to test for the presence of
order-effect bias in journal ranking surveys. Data were obtained from 379
active knowledge management and intellectual capital researchers who
rated 25 journals on a 7-point scale. Five different versions of the
survey instrument were utilized. Consistent with the cognitive
elaboration model, the satisficing theory, and the Gricean maxim of
orderliness, order-effect bias was observed in journal ranking surveys.
Journals that appear in the beginning of the ranking list delivered to
survey respondents consistently receive higher scores than journals at
the end of the list. Overall, the position of the journal in the list
explains over 10% of its score. Therefore, authors of journal ranking
studies are recommended to use multiple versions of the survey instrument
with randomized journal orders. (C) 2012 Elsevier Ltd. All rights
reserved.
AUTHOR ADDRESS: A Serenko, Lakehead Univ, Fac Business Adm, 955 Oliver Rd,
Thunder Bay, ON P7B 5E1, Canada
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TITLE: HTTP 404-page (not) found: Recovery of decayed URL
citations (Article, English)
AUTHOR: Kumar, BTS; Kumar, DV
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.145-157
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): CITATION* item_title
KEYWORDS: URL citations; Decay; Half-life; HTTP-404: page not found;
Wayback machine
KEYWORDS+: UNIFORM RESOURCE LOCATORS; INTERNET REFERENCES; WEB
REFERENCES; LINK ROT; JOURNALS; ACCESSIBILITY;
PERSISTENCE; INFORMATION; MEDLINE; AVAILABILITY
ABSTRACT: Study investigates the availability, persistence and half
life of URL citations cited in two Indian LIS journals articles published
between 2002 and 2010. This study also investigates how researchers can
resurrect lapsed URL citations cited in research articles, using Wayback
machine. A total of 1290 URLs cited in 472 research articles published in
Indian LIS journals spanning a period of 9 years (2002-2010) were
extracted. Study found that only 18.91% (1290 out of 6820) of URLs cited
in these journal articles. 39.84% of URL citations were not accessible
and remaining 60.15% of URL citations were still accessible. The HTTP 404
error message-" page not found" was the overwhelming message encountered
and represented 54.86% of all HTTP error messages. However 51.06% URLs
were recovered from HTTP 404 error message. Study also noticed that the
half-life of URL citations was increased from 6.33 years to 13.85 years
after recovering missing URLs from Wayback machine. (C) 2012 Elsevier
Ltd. All rights reserved.
AUTHOR ADDRESS: BTS Kumar, Tumkur Univ, Dept Studies & Res Lib & Informat
Sci, Tumkur, Karnataka, India
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TITLE: The use of percentiles and percentile rank classes in the
analysis of bibliometric data: Opportunities and limits (Article, English)
AUTHOR: Bornmann, L; Leydesdorff, L; Mutz, R
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.158-165
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): BIBLIOMETR* item_title
KEYWORDS: Percentile; Percentile rank class; Citation impact;
Reference set; Normalized citation impact
KEYWORDS+: RESEARCH PERFORMANCE; RELATIVE INDICATORS; PLOTTING
POSITIONS; PUBLICATION; EXCELLENCE; CHARTS; IMPACT
ABSTRACT: Percentiles have been established in bibliometrics as an
important alternative to mean-based indicators for obtaining a normalized
citation impact of publications. Percentiles have a number of advantages
over standard bibliometric indicators used frequently: for example, their
calculation is not based on the arithmetic mean which should not be used
for skewed bibliometric data. This study describes the opportunities and
limits and the advantages and disadvantages of using percentiles in
bibliometrics. We also address problems in the calculation of percentiles
and percentile rank classes for which there is not (yet) a satisfactory
solution. It will be hard to compare the results of different percentile-
based studies with each other unless it is clear that the studies were
done with the same choices for percentile calculation and rank
assignment. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: L Bornmann, Max Planck Gesell, Div Sci & Innovat Studies,
Hofgartenstr 8, D-80539 Munich, Germany
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TITLE: The impact of unproductive and top researchers on overall
university research performance (Article, English)
AUTHOR: Abramo, G; Cicero, T; D'Angelo, CA
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.166-175
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): PRICE DJD rauth;
HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: Research evaluation; Bibliometrics; Rankings;
Productivity; Top researchers; Universities
KEYWORDS+: RESEARCH PRODUCTIVITY; SYSTEMS; INDEX
ABSTRACT: Unlike competitive higher education systems, non-
competitive systems show relatively uniform distributions of top
researchers and low performers among universities. In this study, we
examine the impact of unproductive and top faculty members on overall
research performance of the university they belong to. Furthermore, we
analyze the potential relationship between research productivity of a
university and the indexes of concentration of unproductive and top
researchers. Research performance is evaluated using a bibliometric
approach, through publications indexed on the Web of Science between 2004
and 2008. The set analyzed consists of all Italian universities active in
the hard sciences. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: G Abramo, Univ Roma Tor Vergata, Dept Management, Sch Engn,
Lab Studies Res & Technol Transfer, Rome, Italy
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TITLE: On the time dependence of the h-index (Article, English)
AUTHOR: Mannella, R; Rossi, P
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.176-182
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: h-index; Time dependence; Time scaled h-index;
Contemporary h-index
ABSTRACT: The time dependence of the h-index is analyzed by
considering the average behavior of h as a function of the academic age
AA for about 1400 Italian physicists, with career lengths spanning from 3
to 46 years. The individual h-index is strongly correlated with the
square root of the total citations Nc: h approximate to 0.53 NC. For
academic ages ranging from 12 to 24 years, the distribution of the time
scaled index h/ sic AA is approximately time-independent and it is well
described by the Gompertz function. The time scaled index h/ sic AA has
an average approximately equal to 3.8 and a standard deviation
approximately equal to 1.6. Finally, the time scaled index h/ sic AA
appears to be strongly correlated with the contemporary h-index hc. (C)
2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: P Rossi, Univ Pisa, Dipartimento Fis Enrico Fermi, I-56127
Pisa, Italy
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TITLE: The functional relation between the impact factor and the
uncitedness factor revisited (Article, English)
AUTHOR: Egghe, L
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.183-189
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): IMPACT FACTOR* item_title;
EGGHE L primaryauthor,author
KEYWORDS: Impact factor; Uncitedness factor; Universal informetric
law; Distribution dependent law; Parameter dependent law
KEYWORDS+: HIRSCH-INDEX; LAW; MODEL; BENFORD; NUMBERS
ABSTRACT: We give a heuristic proof of the relation between the
impact factor (IF) and the uncitedness factor (U), the fraction of the
papers that are uncited: U = 1/1+IF This generalizes the proof of Hsu and
Huang [Physica A 391, 2129-2134, 2012] who obtain the same result but
based on the assumption of the validity of the Matthew-effect. This new
informetric function opens the discussion on universal informetric laws,
distribution dependent laws and parameter dependent laws of which
examples from the informetrics literature are given. (C) 2012 Elsevier
Ltd. All rights reserved.
AUTHOR ADDRESS: L Egghe, Univ Hasselt UHasselt, Campus
Diepenbeek,Agoralaan, B-3590 Diepenbeek, Belgium
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TITLE: Ratios of h-cores, h-tails and uncited sources in sets of
scientific papers and technical patents (Article, English)
AUTHOR: Liu, JQ; Rousseau, R; Wang, MS; Ye, FY
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.190-197
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: h-Index; h-Core; h Tail; h-Ratio; Uncitedness; Scientific
papers; Technical patents; Shifted Lotka distribution;
Three-part division
KEYWORDS+: HIRSCH-INDEX; DISTRIBUTIONS
ABSTRACT: Five ratios RH, RT, SH, ST and SZ derived from the three-
part division of a set of sources in h-core, h-tail and uncited sources
are defined. Dynamic changes in the three independent ratios RH, SH and
SZ are studied for six selected topics. Data about these topics are
obtained from the Web of Science for scientific papers and Derwent
Innovations Index for technical patents. It is observed that all RH-and
SH-values decrease when the time span widens, while SZ stays the same or
increases; and that all RH- and SH-values for papers are larger than the
corresponding values for patents. The shifted Lotka distribution is used
in a theoretical interpretation of these empirical phenomena. (C) 2012
Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: FY Ye, Nanjing Univ, Sch Informat Management, 22 Hankou Rd,
Nanjing 210093, Jiangsu, Peoples R China
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TITLE: The importance of accounting for the number of co-authors
and their order when assessing research performance at the individual
level in the life sciences (Article, English)
AUTHOR: Abramo, G; D'Angelo, CA; Rosati, F
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.198-208
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): ZUCKERMAN HA rauth;
HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: Research evaluation; Co-authorship; Fractional counting;
Bibliometrics; Biology; Medicine
KEYWORDS+: RESEARCH PRODUCTIVITY; G-INDEX; PUBLICATIONS; COAUTHORS;
PATTERNS; CREDIT; IMPACT
ABSTRACT: Accurate measurement of research productivity should take
account of both the number of co-authors of every scientific work and of
the different contributions of the individuals. For researchers in the
life sciences, common practice is to indicate such contributions through
position in the authors list. In this work, we measure the distortion
introduced to bibliometric ranking lists for scientific productivity when
the number of co-authors or their position in the list is ignored. The
field of observation consists of all Italian university professors
working in the life sciences, with scientific production examined over
the period 2004-2008. The outcomes of the study lead to a recommendation
against using indicators or evaluation methods that ignore the different
authors' contributions to the research results. (C) 2012 Elsevier Ltd.
All rights reserved.
AUTHOR ADDRESS: G Abramo, Univ Roma Tor Vergata, Dipartimento Ingn Impresa,
Via Politecn 1, I-00133 Rome, Italy
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TITLE: Independent research of China in Science Citation Index
Expanded during 1980-2011 (Article, English)
AUTHOR: Fu, HZ; Ho, YS
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.210-222
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): ARUNACHALAM S rauth;
ZUCKERMAN HA rauth; SCIENCE CITATION INDEX item_title;
CITATION item_title; CITATION* item_title;
GARFIELD E CURR CONTENTS 32:5 1990;
GARFIELD E JAMA-J AM MED ASSOC 257:52 1987
KEYWORDS: Bibliometric; Web of Science; Y-index; Top cited articles;
Country
KEYWORDS+: FREQUENTLY CITED ARTICLES; BIBLIOMETRIC ANALYSIS;
SCIENTIFIC COLLABORATION; SCIENTOMETRIC ANALYSIS; CARBON
NANOTUBES; JOURNALS; CLASSICS; AUTHORSHIP; NANOTECHNOLOGY;
NANOSCIENCE
ABSTRACT: The study explores the characteristics of China's
independent research articles published from 1980 to 2011, based on the
database of Science Citation Index Expanded. The publication outputs of
seven major industrialized countries including Canada, France, Japan,
Germany, Italy, the UK, and the USA were compared with China. Annual
production, field performance, research emphases and trends, top
articles, as well as main institutional and individual contributors by
its top cited articles were analyzed. Some newly developed indicators
related to words in title, author keywords, KeyWords Plus, first author,
corresponding author, and Y-index were employed to provide in-depth
information on topic and author contributions. Results showed that China
has been closing the gap with the USA with the greatest growth, and has
stood the second since 2006. Most top cited articles were published in
2000s, made up approximately seven tenths of total articles. Pronounced
activities were found in chemistry and physics related categories. The
core categories included multidisciplinary chemistry, physical chemistry,
multidisciplinary materials science, and applied physics. Moreover,
China's performance of nanotechnology and science, especially carbon
nanotubes, nanoparticles, nanowires, and nanostructures showed dramatic
growth. Six top articles with at least 1000 citations were examined, and
were observed to concern medicine, nanotube, and adsorption. In addition,
main contributing institutions and authors were also revealed and
evaluated. Chinese Academy of Sciences played a dominant role, and
Tsinghua University, Peking University and five universities in Hong Kong
showed good scientific performance. (C) 2012 Elsevier Ltd. All rights
reserved.
AUTHOR ADDRESS: YS Ho, Asia Univ, Trend Res Ctr, 500 Lioufeng Rd, Wufeng
41354, Taichung County, Taiwan
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TITLE: C-index: A weighted network node centrality measure for
collaboration competence (Article, English)
AUTHOR: Yan, XB; Zhai, L; Fan, WG
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.223-239
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): HIRSCH JE P NATL ACAD SCI USA 102:16569 2005
KEYWORDS: Centrality measures; Scale-free networks; H-index;
Weighted networks; Node strength
KEYWORDS+: HIRSCH-TYPE INDEXES; H-DEGREE; INDIVIDUALS; COCITATION;
GRAPH
ABSTRACT: This paper proposes a new node centrality measurement
index (c-index) and its derivative indexes (iterative c-index and c(g)-
index) to measure the collaboration competence of a node in a weighted
network. We prove that c-index observe the power law distribution in the
weighted scale-free network. A case study of a very large scientific
collaboration network indicates that the indexes proposed in this paper
are different from other common centrality measures (degree centrality,
betweenness centrality, closeness centrality, eigenvector centrality and
node strength) and other h-type indexes (lobby-index, w-lobby index and h-
degree). The c-index and its derivative indexes proposed in this paper
comprehensively utilize the amount of nodes' neighbors, link strengths
and centrality information of neighbor nodes to measure the centrality of
a node, composing a new unique centrality measure for collaborative
competency. (C) 2012 Elsevier Ltd. All rights reserved.
AUTHOR ADDRESS: XB Yan, Harbin Inst Technol, Sch Management, Harbin 150001,
Peoples R China
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TITLE: Scientometrics reveals funding priorities in medical
research policy (Article, English)
AUTHOR: Vanderelst, D; Speybroeck, N
SOURCE: JOURNAL OF INFORMETRICS 7 (1). JAN 2013. p.240-247
ELSEVIER SCIENCE BV, AMSTERDAM
SEARCH TERM(S): SCIENTOMETRIC* item_title
KEYWORDS: Research policy; Funding; Priorities; Medical research;
Health impact; Burden of disease; Scientometrics; Low
income; Poverty
KEYWORDS+: NEGLECTED TROPICAL DISEASES; GLOBAL BURDEN; FRAMEWORK;
HEALTH
ABSTRACT: Several studies have assessed whether funding of disease
specific research is in line with their burden. The authors of these
studies concluded that the burden of a disease was a good predictor for
its associated research funding. However, previous analyses did not take
into account diseases that mainly affect people living in low income
regions, i.e. so-called diseases of poverty. Moreover, the analyses were
only performed for the burden diseases cause in high income countries. We
investigated whether the conclusions about the relationship between
burden and funding still holds when (1) including diseases of poverty and
(2) accounting for the burden of diseases in low income countries. We
found that the relationship between the burden and the level of diseases
specific funding decreases for people living in low income countries. We
find the best predictor for the level of funding to be the mortality in
high income countries. In contrast to previous studies, we were able to
include more diseases into our analyses (74). This enabled us to discover
differences in funding levels between and within groups of diseases. we
found that research on cancers was over funded with respect to the
associated burden. In contrast, diseases of poverty systematically
receive less funding than would be expected based on their burden. Other
groups of diseases (cardiovascular diseases and mental illnesses)
contained both over and under funded diseases. (C) 2012 Elsevier Ltd. All
rights reserved.
AUTHOR ADDRESS: D Vanderelst, Univ Antwerp, Fac Appl Econ, Prinsstr 13,
B-2000 Antwerp, Belgium
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TITLE: Choosing a scholarly journal during manuscript
submission: the way how it rings true for physiatrists (Article, English)
AUTHOR: Ozcakar, L; Franchignoni, F; Kara, M; Lasa, SM
SOURCE: EUROPEAN JOURNAL OF PHYSICAL AND REHABILITATION MEDICINE
48 (4). DEC 2012. p.643-647 EDIZIONI MINERVA MEDICA,
TURIN
SEARCH TERM(S): JOURNAL item_title
KEYWORDS: Publishing; Journal article; Physical and Rehabilitation
Medicine
KEYWORDS+: REHABILITATION-MEDICINE; BIBLIOMETRIC INDICATORS; AUTHORS
WANT; RESEARCHERS; COMMUNICATION; PERCEPTIONS
ABSTRACT: Background. Research and publications are increasing in
Physical and Rehabilitation Medicine (PRM). Hence, there appears to be a
multifaceted and challenging turnover in our scientific niche involving
authors, editors, publishers and readers in a complex interplay.
Aim. To explore the manuscript submission process from the side of the
authors, and to better understand their perceptions and preferences.
Design. A survey study.
Setting. E-mail and personal contact. Population. European researchers
working in the field of PRM.
Methods. A questionnaire was specifically prepared for this study. The
first part included questions regarding personal and scientific
background; in the second part the attendants rated 20 items (with
respect to several journal characteristics) on a 4-point semantic
differential scale; and the third part contained two open ended questions
regarding additional factors that the authors considered during
submission.
Results. Area of interest (mission and contents) of the journal within
the "Rehabilitation" category, absolute impact factor of the journal,
match between perceived "quality" of their study and journal impact
factor were considered to be the three most important factors by the
authors.
Conclusion. In a scientific environment where the numbers of research and
publication outlets alike are growing, it is important to understand how
authors choose where to publish their papers. Clinical rehabilitation
impact. We believe that editors, and publishers as well, would take into
account our findings to best meet the needs of all actors in the
competitive marketplace of scholarly publishing in PRM.
AUTHOR ADDRESS: L Ozcakar, Hacettepe Univ, Sch Med, Zemin Kat FTR AD, Dept
Phys & Rehabil Med, Ankara, Turkey
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TITLE: Consistency of systematic chemical identifiers within and
between small-molecule databases (Article, English)
AUTHOR: Akhondi, SA; Kors, JA; Muresan, S
SOURCE: JOURNAL OF CHEMINFORMATICS 4. DEC 13 2012.
p.NIL_6-NIL_12 BIOMED CENTRAL LTD, LONDON
SEARCH TERM(S): GARFIELD E rauth
KEYWORDS: Molecular structure; Chemical databases; Systematic
chemical identifiers; Quality control; InChI; SMILES;
IUPAC
KEYWORDS+: CHEMISTRY DATABASES; CURATION; STANDARD; QUALITY; SMILES
ABSTRACT: Background: Correctness of structures and associated
metadata within public and commercial chemical databases greatly impacts
drug discovery research activities such as quantitative structure-
property relationships modelling and compound novelty checking. MOL
files, SMILES notations, IUPAC names, and InChI strings are ubiquitous
file formats and systematic identifiers for chemical structures. While
interchangeable for many cheminformatics purposes there have been no
studies on the inconsistency of these structure identifiers due to
various approaches for data integration, including the use of different
software and different rules for structure standardisation. We have
investigated the consistency of systematic identifiers of small molecules
within and between some of the commonly used chemical resources, with and
without structure standardisation.
Results: The consistency between systematic chemical identifiers and
their corresponding MOL representation varies greatly between data
sources (37.2%-98.5%). We observed the lowest overall consistency for MOL-
IUPAC names. Disregarding stereochemistry increases the consistency
(84.8% to 99.9%). A wide variation in consistency also exists between MOL
representations of compounds linked via cross-references (25.8% to
93.7%). Removing stereochemistry improved the consistency (47.6% to
95.6%).
Conclusions: We have shown that considerable inconsistency exists in
structural representation and systematic chemical identifiers within and
between databases. This can have a great influence especially when
merging data and if systematic identifiers are used as a key index for
structure integration or cross-querying several databases. Regenerating
systematic identifiers starting from their MOL representation and
applying well-defined and documented chemistry standardisation rules to
all compounds prior to creating them can dramatically increase internal
consistency.
AUTHOR ADDRESS: SA Akhondi, Erasmus Univ, Med Ctr, Dept Med Informat, POB
2040, NL-3000 CA Rotterdam, Netherlands
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