1,720,985 research outputs found
Archive systems for the TNG telescope: lessons learned in the VO perspective
No full texted. A. Szala
BaSTI: An updated, advanced and VO-compliant database of stellar evolution predictions
No full textStellar evolution model databases, spanning a wide ranges of masses and initial chemical compositions, are nowadays a major tool to study Galactic and extragalactic stellar populations. We describe here the current status of the widely used BaSTI (A Bag of Stellar Tracks and Isochrones) database. We focus in particular on the efforts devoted to port BaSTI to a VO-compliant environment, the BaSTI Web portal that enables users to retrieve data tables and run a range of web tools to facilitate the theoretical analysis of observations, and planned future developments within the framework of the Italian Virtual Observatory project
Planck/LFI Pipeline -- The Demonstration Model
No full textLFI is one of the two instruments installed on board Planck, the M3 mission of the ESA Horizon 2000+ program, the main goal of which is to produce maps of the CAM (Cosmic Microwave Background) with an unprecedented combination of angular resolution, sensitivity, spatial coverage, and frequency range. The Demonstration Model (DM) is the second version of the LFI DPC pipeline, built on top of the BBM (Bread-Board Model), released in July 2002. The DM has been integrated at DPC using the Process Coordinator and FITS files for standard data exchange; in the future, instead of using FITS files; the pipeline will be compliant with the Planck DAM (Data Management Component) standard. The DM goal is to demonstrate that the current pipeline is able to handle the foreseen LFI data flow and to perform an end-to-end processing of the data, from telemetry to the production of the scientific results. The DM development was mainly concentrated on understanding and removing systematic effects; at the moment the pipeline is able to detect and remove all systematic effects which are understood and modeled within the Planck simulation pipeline, such as thermal fluctuations, 1/f noise; the side-lobe effects, beam distortion, and so on
Archive systems for the TNG telescope: lessons learned in the VO perspective
No full texted. A. Szala
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Organization of the Euclid Data Processing: Dealing with Complexity
Full text linkThe data processing development and operations for the Euclid mission (part of the ESA Cosmic Vision 2015-2025 Plan) is distributed within a Consortium composed of 14 countries and 1300+ persons: this imposes a high degree of complexity to the design and implementation of the data processing facilities. The focus of this paper is on the efforts to define an organisational structure capable of handling in manageable terms such a complexity
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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