1,549 research outputs found
RPYS i/o: A web-based tool for the historiography and visualization of citation classics, sleeping beauties, and research fronts
Reference Publication Year Spectroscopy (RPYS) and Multi-RPYS provide
algorithmic approaches to reconstructing the intellectual histories of
scientific fields. With this brief communication, we describe a technical
advancement for developing research historiographies by introducing RPYS i/o,
an online tool for performing standard RPYS and Multi-RPYS analyses
interactively (at http://comins.leydesdorff.net/). The tool enables users to
explore seminal works underlying a research field and to plot the influence of
these seminal works over time. This suite of visualizations offers the
potential to analyze and visualize the myriad of temporal dynamics of
scientific influence, such as citation classics, sleeping beauties, and the
dynamics of research fronts. We demonstrate the features of the tool by
analyzing--as an example--the references in documents published in the journal
Philosophy of Science
Introducing CitedReferencesExplorer (CRExplorer): A program for Reference Publication Year Spectroscopy with Cited References Standardization
We introduce a new tool - the CitedReferencesExplorer (CRExplorer,
www.crexplorer.net) - which can be used to disambiguate and analyze the cited
references (CRs) of a publication set downloaded from the Web of Science (WoS).
The tool is especially suitable to identify those publications which have been
frequently cited by the researchers in a field and thereby to study for example
the historical roots of a research field or topic. CRExplorer simplifies the
identification of key publications by enabling the user to work with both a
graph for identifying most frequently cited reference publication years (RPYs)
and the list of references for the RPYs which have been most frequently cited.
A further focus of the program is on the standardization of CRs. It is a
serious problem in bibliometrics that there are several variants of the same CR
in the WoS. In this study, CRExplorer is used to study the CRs of all papers
published in the Journal of Informetrics. The analyses focus on the most
important papers published between 1980 and 1990.Comment: Accepted for publication in the Journal of Informetric
Climate change and viticulture - a quantitative analysis of a highly dynamic research field
In this study, we analyzed the newly emerging research field of climate change in combination with viticulture. Our analyses have two objectives: First, the overall publication output and the growth of research on climate change and viticulture is presented and analyzed. We developed a sophisticated search query to cover the relevant literature as completely as possible and to exclude irrelevant literature. The time evolution of the publications of the research topic as well as the most contributing journals and countries of authors, and the major research areas are presented. Second, most important publications in the historical context of this field are identified. Both analyses are based on a carefully selected publication set of 1039 papers (articles, reviews, and conference proceedings) dealing with the implications of climate change for viticulture. The results reveal that the number of papers published per year dealing with climate change and viticulture shows a strong increase: Since around 2000, the number increased by a factor of ten, whereas in the same time period the overall number of papers increased by a factor of around two. We identified 14 citation classics which include fundamental early works of viticulture with a weak connection to climate change and more recent works with a stronger connection to climate change
Referenced Publication Year Spectroscopy (RPYS) and Algorithmic Historiography: The Bibliometric Reconstruction of Andr\'as Schubert's {\OE}uvre
Referenced Publication Year Spectroscopy (RPYS) was recently introduced as a
method to analyze the historical roots of research fields and groups or
institutions. RPYS maps the distribution of the publication years of the cited
references in a document set. In this study, we apply this methodology to the
{\oe}uvre of an individual researcher on the occasion of a Festschrift for
Andr\'as Schubert's 70th birthday. We discuss the different options of RPYS in
relation to one another (e.g. Multi-RPYS), and in relation to the longer-term
research program of algorithmic historiography (e.g., HistCite) based on
Schubert's publications (n=172) and cited references therein as a bibliographic
domain in scientometrics. Main path analysis and Multi-RPYS of the citation
network are used to show the changes and continuities in Schubert's
intellectual career. Diachronic and static decomposition of a document set can
lead to different results, while the analytically distinguishable lines of
research may overlap and interact over time, and intermittent.Comment: Leydesdorff, L., Bornmann, L., Comins, J. A., Marx, W., & Thor, A.
(2016). Referenced Publication Year Spectrography (RPYS) and Algorithmic
Historiography: A Bibliometric Reconstruction of Andr\'as Schubert's
{\OE}uvre. In W. Gl\"anzel & B. Schlemmer (Eds.), Andr\'as Schubert--A World
of Models and Metrics (pp. 79-96). Louvain: ISS
Identifying single influential publications in a research field: New analysis opportunities of the CRExplorer
Reference Publication Year Spectroscopy (RPYS) has been developed for
identifying the cited references (CRs) with the greatest influence in a given
paper set (mostly sets of papers on certain topics or fields). The program
CRExplorer (see www.crexplorer.net) was specifically developed by Thor, Marx,
Leydesdorff, and Bornmann (2016a, 2016b) for applying RPYS to publication sets
downloaded from Scopus or Web of Science. In this study, we present some
advanced methods which have been newly developed for CRExplorer. These methods
are able to identify and characterize the CRs which have been influential
across a longer period (many citing years). The new methods are demonstrated in
this study using all the papers published in Scientometrics between 1978 and
2016. The indicators N_TOP50, N_TOP25, and N_TOP10 can be used to identify
those CRs which belong to the 50%, 25%, or 10% most frequently cited
publications (CRs) over many citing publication years. In the Scientometrics
dataset, for example, Lotka's (1926) paper on the distribution of scientific
productivity belongs to the top 10% publications (CRs) in 36 citing years.
Furthermore, the new version of CRExplorer analyzes the impact sequence of CRs
across citing years. CRs can have below average (-), average (0), or above
average (+) impact in citing years (whereby average is meant in the sense of
expected values). The sequence (e.g. 00++---0--00) is used by the program to
identify papers with typical impact distributions. For example, CRs can have
early, but not late impact ("hot papers", e.g. +++---) or vice versa ("sleeping
beauties", e.g. ---0000---++)
A Bibliometric Analysis of the Papers Published in the Journal of Artificial Intelligence in Education from 2015-2019
To analyze the current research status and trends of the artificial intelligence in education field, we applied bibliometric methods to examine the articles published in one of the representative journals of the field, International Journal of Artificial Intelligence in Education, from 2015 to 2019. We analyzed 135 articles retrieved from the Web of Science database and examined prolific countries, collaboration networks, prolific authors, keywords, and the citations the articles received. Through examining keywords, we found that the authors largely focused on students and learning. Through examining prolific authors and countries, we found active publication of corresponding authors from United States, United Kingdom, Canada, and Germany. We found international collaboration among some researchers and institutions, such as strong collaboration network between United States and Canada. We suggest reinforcement in building more widespread international partnership and expanding collaboration network by including diverse institutions. International collaboration and expanded institutional network can improve research by incorporating various perspectives and expertise
Roadmap of ultrafast x-ray atomic and molecular physics
X-ray free-electron lasers (XFELs) and table-top sources of x-rays based upon high harmonic generation (HHG) have revolutionized the field of ultrafast x-ray atomic and molecular physics, largely due to an explosive growth in capabilities in the past decade. XFELs now provide unprecedented intensity (1020 W cm−2) of x-rays at wavelengths down to ~1 Ångstrom, and HHG provides unprecedented time resolution (~50 attoseconds) and a correspondingly large coherent bandwidth at longer wavelengths. For context, timescales can be referenced to the Bohr orbital period in hydrogen atom of 150 attoseconds and the hydrogen-molecule vibrational period of 8 femtoseconds; wavelength scales can be referenced to the chemically significant carbon K-edge at a photon energy of ~280 eV (44 Ångstroms) and the bond length in methane of ~1 Ångstrom. With these modern x-ray sources one now has the ability to focus on individual atoms, even when embedded in a complex molecule, and view electronic and nuclear motion on their intrinsic scales (attoseconds and Ångstroms). These sources have enabled coherent diffractive imaging, where one can image non-crystalline objects in three dimensions on ultrafast timescales, potentially with atomic resolution. The unprecedented intensity available with XFELs has opened new fields of multiphoton and nonlinear x-ray physics where behavior of matter under extreme conditions can be explored. The unprecedented time resolution and pulse synchronization provided by HHG sources has kindled fundamental investigations of time delays in photoionization, charge migration in molecules, and dynamics near conical intersections that are foundational to AMO physics and chemistry. This roadmap coincides with the year when three new XFEL facilities, operating at Ångstrom wavelengths, opened for users (European XFEL, Swiss-FEL and PAL-FEL in Korea) almost doubling the present worldwide number of XFELs, and documents the remarkable progress in HHG capabilities since its discovery roughly 30 years ago, showcasing experiments in AMO physics and other applications. Here we capture the perspectives of 17 leading groups and organize the contributions into four categories: ultrafast molecular dynamics, multidimensional x-ray spectroscopies; high-intensity x-ray phenomena; attosecond x-ray science
Roadmap of ultrafast x-ray atomic and molecular physics
International audience
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