243 research outputs found
Using Multipartite Graphs for Recommendation and Discovery
The Smithsonian/NASA Astrophysics Data System exists at the nexus of a dense
system of interacting and interlinked information networks. The syntactic and
the semantic content of this multipartite graph structure can be combined to
provide very specific research recommendations to the scientist/user.Comment: To appear in ADASS XIX, ASP Conf Pro
Bibliographic Classification using the ADS Databases
We discuss two techniques used to characterize bibliographic records based on
their similarity to and relationship with the contents of the NASA Astrophysics
Data System (ADS) databases. The first method has been used to classify input
text as being relevant to one or more subject areas based on an analysis of the
frequency distribution of its individual words. The second method has been used
to classify existing records as being relevant to one or more databases based
on the distribution of the papers citing them. Both techniques have proven to
be valuable tools in assigning new and existing bibliographic records to
different disciplines within the ADS databases.Comment: Latex, 4 pages, 1 Figure. To be published in the Proceedings of the
Conference "Astronomical Data Analysis Software & Systems XV" held October
2-5, 2005, in San Lorenzo de El Escorial, Spai
Data in the ADS -- Understanding How to Use it Better
The Smithsonian/NASA ADS Abstract Service contains a wealth of data for
astronomers and librarians alike, yet the vast majority of usage consists of
rudimentary searches. Hints on how to obtain more focused search results by
using more of the various capabilities of the ADS are presented, including
searching by affiliation. We also discuss the classification of articles by
content and by referee status.
The ADS is funded by NASA Grant NNG06GG68G-16613687.Comment: 4 pages; submitted to the proceedings of the Library and Information
Services in Astronomy V; to be published by ASP Conference Proceeding
Use of Astronomical Literature - A Report on Usage Patterns
In this paper we present a number of metrics for usage of the SAO/NASA
Astrophysics Data System (ADS). Since the ADS is used by the entire
astronomical community, these are indicative of how the astronomical literature
is used. We will show how the use of the ADS has changed both quantitatively
and qualitatively. We will also show that different types of users access the
system in different ways. Finally, we show how use of the ADS has evolved over
the years in various regions of the world.
The ADS is funded by NASA Grant NNG06GG68G.Comment: 12 pages, 8 figures, 2 tables. Accepted by Journal of Informetric
Full Text Searching in the Astrophysics Data System
The Smithsonian/NASA Astrophysics Data System (ADS) provides a search system
for the astronomy and physics scholarly literature. All major and many smaller
astronomy journals that were published on paper have been scanned back to
volume 1 and are available through the ADS free of charge. All scanned pages
have been converted to text and can be searched through the ADS Full Text
Search System. In addition, searches can be fanned out to several external
search systems to include the literature published in electronic form. Results
from the different search systems are combined into one results list.
The ADS Full Text Search System is available at:
http://adsabs.harvard.edu/fulltext_service.htmlComment: To appear in Library and Information Systems in Astronomy
Effect of E-printing on Citation Rates in Astronomy and Physics
In this report we examine the change in citation behavior since the
introduction of the arXiv e-print repository (Ginsparg, 2001). It has been
observed that papers that initially appear as arXiv e-prints get cited more
than papers that do not (Lawrence, 2001; Brody et al., 2004; Schwarz &
Kennicutt, 2004; Kurtz et al., 2005a, Metcalfe, 2005). Using the citation
statistics from the NASA-Smithsonian Astrophysics Data System (ADS; Kurtz et
al., 1993, 2000), we confirm the findings from other studies, we examine the
average citation rate to e-printed papers in the Astrophysical Journal, and we
show that for a number of major astronomy and physics journals the most
important papers are submitted to the arXiv e-print repository first.Comment: Submitted to the Journal of Electronic Publishing. 11 pages with 5
figure
The Future of Technical Libraries
Technical libraries are currently experiencing very rapid change. In the near
future their mission will change, their physical nature will change, and the
skills of their employees will change. While some will not be able to make
these changes, and will fail, others will lead us into a new era.Comment: To appear in Library and Information Systems in Astronomy
Creation and use of Citations in the ADS
With over 20 million records, the ADS citation database is regularly used by
researchers and librarians to measure the scientific impact of individuals,
groups, and institutions. In addition to the traditional sources of citations,
the ADS has recently added references extracted from the arXiv e-prints on a
nightly basis. We review the procedures used to harvest and identify the
reference data used in the creation of citations, the policies and procedures
that we follow to avoid double-counting and to eliminate contributions which
may not be scholarly in nature. Finally, we describe how users and institutions
can easily obtain quantitative citation data from the ADS, both interactively
and via web-based programming tools.
The ADS is available at http://ads.harvard.edu.Comment: 9 pages; to be published in the proceedings of the conference
"Library and Information Services V," June 2006, Cambridge, MA, US
Computing and Using Metrics in the ADS
Finding measures for research impact, be it for individuals, institutions,
instruments or projects, has gained a lot of popularity. More papers than ever
are being written on new impact measures, and problems with existing measures
are being pointed out on a regular basis. Funding agencies require impact
statistics in their reports, job candidates incorporate them in their resumes,
and publication metrics have even been used in at least one recent court case.
To support this need for research impact indicators, the SAO/NASA Astrophysics
Data System (ADS) has developed a service which provides a broad overview of
various impact measures. In this presentation we discuss how the ADS can be
used to quench the thirst for impact measures. We will also discuss a couple of
the lesser known indicators in the metrics overview and the main issues to be
aware of when compiling publication-based metrics in the ADS, namely author
name ambiguity and citation incompleteness.Comment: to appear in proceedings of LISA VII conference, Naples, Ital
Paper to Screen: Processing Historical Scans in the ADS
The NASA Astrophysics Data System in conjunction with the Wolbach Library at
the Harvard-Smithsonian Center for Astrophysics is working on a project to
microfilm historical observatory publications. The microfilm is then scanned
for inclusion in the ADS. The ADS currently contains over 700,000 scanned pages
of volumes of historical literature. Many of these volumes lack clear
pagination or other bibliographic data that are necessary to take advantage of
the searching capabilities of the ADS. This paper will address some of the
interesting challenges that needed to be resolved during the processing of the
Observatory Reports included in the ADS.Comment: 4 pages; submitted to the proceedings of Library and Information
Services in Astronomy; to be published in the ASP Conference Serie
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