57,072 research outputs found
Worldwide Use and Impact of the NASA Astrophysics Data System Digital Library
By combining data from the text, citation, and reference databases with data
from the ADS readership logs we have been able to create Second Order
Bibliometric Operators, a customizable class of collaborative filters which
permits substantially improved accuracy in literature queries.
Using the ADS usage logs along with membership statistics from the
International Astronomical Union and data on the population and gross domestic
product (GDP) we develop an accurate model for world-wide basic research where
the number of scientists in a country is proportional to the GDP of that
country, and the amount of basic research done by a country is proportional to
the number of scientists in that country times that country's per capita GDP.
We introduce the concept of utility time to measure the impact of the
ADS/URANIA and the electronic astronomical library on astronomical research. We
find that in 2002 it amounted to the equivalent of 736 FTE researchers, or $250
Million, or the astronomical research done in France.
Subject headings: digital libraries; bibliometrics; sociology of science;
information retrievalComment: ADS bibcode: 2005JASIS..56...36K This is a portion (The bibliometric
properties of article readership information is the other part) of the
article: The NASA Astrophysics Data System: Sociology, bibliometrics and
impact, which went on-line in the summer of 200
Scholarly Impact: a Bibliometric and Altmetric study of the Journal of Community Informatics
Demonstrating scholarly impact is a matter of growing importance. This paper reports on a bibliometric and altmetric analysis conducted on the Journal of Community Informatics (JOCI). Besides the bibliometric analysis the study also looked into JOCI article-level metrics by comparing usage metrics (article views), alternative metrics (Mendeley readership), and traditional citation metrics (Google Scholar citations). The main contribution is to provide more insight into the metrics that could influence the citation impact in Community Informatics research. Furthermore, the study used article-level metrics data to identify, compare and rank the most impactful papers published in JOCI over a 12-year period
The NASA Astrophysics Data System: Overview
The NASA Astrophysics Data System Abstract Service has become a key component
of astronomical research. It provides bibliographic information daily, or near
daily, to a majority of astronomical researchers worldwide.
We describe the history of the development of the system and its current
status.
We show several examples of how to use the ADS, and we show how ADS use has
increased as a function of time. Currently it is still increasing
exponentially, with a doubling time for number of queries of 17 months.
Using the ADS logs we make the first detailed model of how scientific
journals are read as a function of time since publication.
The impact of the ADS on astronomy can be calculated after making some simple
assumptions. We find that the ADS increases the efficiency of astronomical
research by 333 Full Time Equivalent (2000 hour) research years per year, and
that the value of the early development of the ADS for astronomy, compared with
waiting for mature technologies to be adopted, is 2332 FTE research years.
The ADS is available at http://adswww.harvard.edu/.Comment: 19 pages, 22 figure
Networks of reader and country status: An analysis of Mendeley reader statistics
The number of papers published in journals indexed by the Web of Science core
collection is steadily increasing. In recent years, nearly two million new
papers were published each year; somewhat more than one million papers when
primary research papers are considered only (articles and reviews are the
document types where primary research is usually reported or reviewed).
However, who reads these papers? More precisely, which groups of researchers
from which (self-assigned) scientific disciplines and countries are reading
these papers? Is it possible to visualize readership patterns for certain
countries, scientific disciplines, or academic status groups? One popular
method to answer these questions is a network analysis. In this study, we
analyze Mendeley readership data of a set of 1,133,224 articles and 64,960
reviews with publication year 2012 to generate three different kinds of
networks: (1) The network based on disciplinary affiliations of Mendeley
readers contains four groups: (i) biology, (ii) social science and humanities
(including relevant computer science), (iii) bio-medical sciences, and (iv)
natural science and engineering. In all four groups, the category with the
addition "miscellaneous" prevails. (2) The network of co-readers in terms of
professional status shows that a common interest in papers is mainly shared
among PhD students, Master's students, and postdocs. (3) The country network
focusses on global readership patterns: a group of 53 nations is identified as
core to the scientific enterprise, including Russia and China as well as two
thirds of the OECD (Organisation for Economic Co-operation and Development)
countries.Comment: 26 pages, 6 figures (also web-based startable), and 2 table
Positional Effects on Citation and Readership in arXiv
arXiv.org mediates contact with the literature for entire scholarly
communities, both through provision of archival access and through daily email
and web announcements of new materials, potentially many screenlengths long. We
confirm and extend a surprising correlation between article position in these
initial announcements, ordered by submission time, and later citation impact,
due primarily to intentional "self-promotion" on the part of authors. A pure
"visibility" effect was also present: the subset of articles accidentally in
early positions fared measurably better in the long-term citation record than
those lower down. Astrophysics articles announced in position 1, for example,
overall received a median number of citations 83\% higher, while those there
accidentally had a 44\% visibility boost. For two large subcommunities of
theoretical high energy physics, hep-th and hep-ph articles announced in
position 1 had median numbers of citations 50\% and 100\% larger than for
positions 5--15, and the subsets there accidentally had visibility boosts of
38\% and 71\%.
We also consider the positional effects on early readership. The median
numbers of early full text downloads for astro-ph, hep-th, and hep-ph articles
announced in position 1 were 82\%, 61\%, and 58\% higher than for lower
positions, respectively, and those there accidentally had medians
visibility-boosted by 53\%, 44\%, and 46\%. Finally, we correlate a variety of
readership features with long-term citations, using machine learning methods,
thereby extending previous results on the predictive power of early readership
in a broader context. We conclude with some observations on impact metrics and
dangers of recommender mechanisms.Comment: 28 pages, to appear in JASIS
The journals of importance to UK clinicians: A questionnaire survey of surgeons
Background: Peer-reviewed journals are seen as a major vehicle in the transmission of research
findings to clinicians. Perspectives on the importance of individual journals vary and the use of
impact factors to assess research is criticised. Other surveys of clinicians suggest a few key journals
within a specialty, and sub-specialties, are widely read. Journals with high impact factors are not
always widely read or perceived as important. In order to determine whether UK surgeons
consider peer-reviewed journals to be important information sources and which journals they read
and consider important to inform their clinical practice, we conducted a postal questionnaire
survey and then compared the findings with those from a survey of US surgeons.
Methods: A questionnaire survey sent to 2,660 UK surgeons asked which information sources
they considered to be important and which peer-reviewed journals they read, and perceived as
important, to inform their clinical practice. Comparisons were made with numbers of UK NHSfunded
surgery publications, journal impact factors and other similar surveys.
Results: Peer-reviewed journals were considered to be the second most important information
source for UK surgeons. A mode of four journals read was found with academics reading more
than non-academics. Two journals, the BMJ and the Annals of the Royal College of Surgeons of England,
are prominent across all sub-specialties and others within sub-specialties. The British Journal of
Surgery plays a key role within three sub-specialties. UK journals are generally preferred and
readership patterns are influenced by membership journals. Some of the journals viewed by
surgeons as being most important, for example the Annals of the Royal College of Surgeons of England,
do not have high impact factors.
Conclusion: Combining the findings from this study with comparable studies highlights the
importance of national journals and of membership journals. Our study also illustrates the
complexity of the link between the impact factors of journals and the importance of the journals
to clinicians. This analysis potentially provides an additional basis on which to assess the role of
different journals, and the published output from research
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