1,720,971 research outputs found
Design of the Forward Diffractive Detector's Control System for CERN-LHC Run 3
No full textThe ALICE experiment is currently participating in the recently started Run 3 of CERN LHC, in which collision rate and thus data stream rate had been significantly increased with respect to Run 2. Several upgrades were required for ALICE prior to the start or Run 3, including implementation of a new Online-Offline (O2) system to handle the new data flow, and upgrading detectors. For instance, the AD (ALICE Diffractive) was replaced by the new Forward Diffractive Detector (FDD) and included in the Fast Interaction Trigger (FIT) project. Therefore, development of a Detector Control System (DCS) for FDD was necessary. The DCS is one of the fundamental systems of CERN experiments which allows for essential tasks such as remote and safe operation, monitoring, configuration and recording of data. The aim of this work was to collaborate in the design, development and integration of the DCS for FDD, as well as taking part of installation and calibration of the detector. Specific objectives also include communicating the DCS to its corresponding experimental equipment, implementing the FDD-DCS according to the general requirements of the FIT project and the particular ones for FDD, integrating the DCS to the ALICE central DCS observing all of its guidelines, and optimizing the configuration process of FDD through the DCS for data taking. Chapter 1 briefly defines ALICE, FIT, FDD and their main purpose. Chapter 2 describes the components of a DCS, emphasizing the software tools required for its development. Chapter 3 lists the hardware equipment to be controlled by the DCS. Chapter 4 describes the modeling of FDD-DCS as a hierarchical structure composed of finite state machines and explains the design of the various user interface panels for operators. Chapter 5 describes configuration of several DCS features essential for operation: the alarm, archiving and SAFE systems, the trending panels and the automated configuration process. A manuscript based on this work was accepted and published in the Nuclear Instruments and Methods in Physics Research A scientific journal
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
Optimización de la exposición de rayos x para el diagnóstico de neoplasias en el tórax en pacientes adultos
Full text link“En el presente estudio se realizaron pruebas de control de calidad en un equipo de Tomografía Axial Computarizada Philips Brilliance Big Bore y en un equipo de Mastografía Selenia de una Unidad Médica de Alta Especialidad del Instituto Mexicano del Seguro Social. Mediante dichas pruebas, se verificó el correcto desempeño de los equipos y la consistencia entre los parámetros que reportan y los parámetros medidos. Posteriormente se realizó una recopilación estadística de la dosis colectiva en la población del hospital sometida a estudios de Tomografía en la región del tórax. Con base en los resultados anteriores, se estimó el riesgo poblacional de carcinogénesis y se compararon los niveles de referencia de dosis locales para el tórax con los publicados internacionalmente. Finalmente se realizaron pruebas de optimización de dosis, también en Tomografía, comparando la calidad de imagen de los estudios con y sin optimización”
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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