1,722,435 research outputs found
Searches for new physics in diphoton events in p(p)over-bar collisions at root s=1.8 TeV
No full textProperties of six-jet events with large six-jet mass at the Fermilab proton-antiproton collider
No full textLimits on quark-lepton compositeness scales from dileptons produced in 1.8 TeV p(p)over-bar collisions
No full textThe camera calibration system for the first Large-Sized Telescope designed for the Cherenkov Telescope Array Observatory
No full textThe commissioning phase of the first Large-Sized Telescope (LST-1), the first out of four in construction for the northern site of the Cherenkov Telescope Array Observatory (CTAO), is almost completed. The LST-1 is a prime focus ground-based gamma-ray telescope with a 24 m diameter and 28 m focal length parabolic dish, inaugurated in October 2018 at Observatorio del Roque de los Muchachos (ORM), La Palma (Spain). The LST-1 is equipped with a camera Calibration System (CaliBox), placed at the center of the mirror dish, that uniformly illuminates the Camera at the telescope focal plane 28 m away. The intensity of the light beam and its time characteristics permits to calibrate the Camera response to shower events. Here we describe the CaliBox mechanical structure, the optical performance, the new internal-calibration hardware and software system including the definitive OPC-UA Server protocol logic used to manage the CaliBox and the internal sub-systems
Performance of the INFN Camera calibration device of the first Large Size Telescope in the Cherenkov Telescope Array
No full textOn October 10th 2018 started the commissioning of the first Large Size Telescope (LST) prototype at the Cherenkov Telescope Array (CTA) northern site at the Observatorio del Roque de los Muchachos, Canary Island of La Palma (Spain). For a precise event energy reconstruction, an LST camera requires a uniform and constant calibration over a large dynamic range, up to 104 photo-electrons (p.e.), for each camera photomultiplier tube (PMT). This paper describes the performance of the LST-1 camera calibration system (named CaliBox) in the first commissioning period and provides preliminary results of measurements of the light flat field
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
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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