An Analysis of Subject Coverage and Worldwide Involvement of E-LIS: the International Repository for Library and Information Science.

E-LIS, E-prints for Library and Information Science, is a subject-oriented repository initiated in January 2003 by a group of European information specialists. E-LIS is an open-access repository run by experts and editors from many different countries and with holdings originating in 110 countries. The first purpose of this study is to provide a description of E-LIS with special attention to the types of documents archived and the geographical distribution of its contributors. The second purpose is to determine the subject coverage, which is done by using several well-known bibliometric techniques. Using co-occurrences of subject terms, a cluster analysis is performed, producing four major clusters; a correspondence analysis of keywords and subject terms produces eight groups of association

Inside Science Resources in Retrospective – 2015 – 2020

The purpose of this report is threefold: 1. To summarize the production of the committee since its beginning in April of 2015; 2. To give credit to all the contributors for their excellent work in identifying resources of value to the STEM community; and 3. To provide an easy index for all the contributions made. A total of 63 contributions have been published in this blog, which have been written by 30 of our STS colleagues

MgII absorption systems with W_0 > 0.1 \AA for a radio selected sample of 77 QSOs and their associated magnetic fields at high redshifts

We present a catalogue of MgII absorption systems obtained from high resolution UVES/VLT data of 77 QSOs in the redshift range 0.6 < z < 2.0, and down to an equivalent width W_0 > 0.1 \AA. The statistical properties of our sample are found to be in agreement with those from previous work in the literature. However, we point out that the previously observed increase with redshift of dN/dz for weak absorbers, pertains exclusively to very weak absorbers with W_0 < 0.1 \AA. Instead, dN/dz for absorbers with W_0 in the range 0.1-0.3 \AA actually decreases with redshift, similarly to the case of strong absorbers. We then use this catalogue to extend our earlier analysis of the links between the Faraday Rotation Measure of the quasars and the presence of intervening MgII absorbing systems in their spectra. In contrast to the case with strong MgII absorption systems W_0 > 0.3 \AA, the weaker systems do not contribute significantly to the observed Rotation Measure of the background quasars. This is possibly due to the higher impact parameters of the weak systems compared to strong ones, suggesting that the high column density magnetized material that is responsible for the Faraday Rotation is located within about 50 kpc of the galaxies. Finally, we show that this result also rules out the possibility that some unexpected secondary correlation between the quasar redshift and its intrinsic Rotation Measure is responsible for the association of high Rotation Measure and strong intervening MgII absorption that we have presented elsewhere, since this would have produced an equal effect for the weak absorption line systems, which exhibit a very similar distribution of quasar redshifts.Comment: Accepted for publication in ApJ. 12 pages, 8 figure

AAMQS: a non-linear QCD description of new HERA data at small-x

We present a global analysis of available data on inclusive structure functions measured in electron-proton scattering at small values of Bjorken-x, including the latest data from the combined HERA analysis on reduced cross sections. Our approach relies on the dipole formulation of DIS together with the use of the non-linear running coupling BK equation for the description of the small-x dynamics. With the resulting parametrization we are able to describe the latest FL data measured by the H1 collaboration. Further, we discuss the kinematical domain where significant deviations from NLO-DGLAP should be expected and the ability of non-linnear physics to account for such deviations.Comment: 4 pages, 2 figures, Proceedings of Quark Matter 2011, Annecy, Franc

Ferromagnetic bubble clusters in Y0.67_{0.67}Ca0.33_{0.33}MnO3_3 thin films

We studied the ferromagnetic topology in a Y$_{0.67}$Ca$_{0.33}$MnO$_3$ thin film with a combination of magnetic force microscopy and magnetization measurements. Our results show that the spin-glass like behavior, reported previously for this system, could be attributed to frustrated interfaces of the ferromagnetic clusters embedded in a non-ferromagnetic matrix. We found temperature dependent changes of the magnetic topology at low temperatures, which suggests a non-static Mn$^{3+}$/Mn$^{4+}$ ratio

A Visualization Model Used for Determining the Effectiveness of Information Retrieval in a Scientific Database

In this study, we demonstrate that a visualization model can determine the effectiveness of searching a bibliographic database, when three descriptive metadata fields are compared. The Inspec database was searched to create a bibliography of articles about a broad scientific topic, interplanetary travel. We collected metadata from 823 Inspec articles and used the Sci2 Tool to create co-occurrence networks based on subject terms, title keywords, and classification codes from each of the articles. The Watts-Strogatz clustering coefficient model was used to create molecular organization of the networks. This method identified subject domain clusters for each of the three selected metadata elements and subject classification codes were extracted from all the clusters obtained. All data obtained was converted into a common metadata element (classification codes), allowing for the comparison of data from the initial search and from all the subject clusters identified in the visualization process. A set of eight subject codes were found to describe the Main Subject Domain of interplanetary travel. The results also show that searching with classification codes produced the best outcome, the second best option is using subject terms, and the least effective search technique is using title keywords. These results, using visualization, corroborate previous studies

A predictive phenomenological tool at small Bjorken-x

We present the results from global fits of inclusive DIS experimental data using the Balitsky-Kovchegov equation with running coupling.Comment: 5 pages, 2 figures, prepared for the Proceedings of 'Hot Quarks 2010