1,720,966 research outputs found
Testare il Modello Standard con misure di precisione del sapore tramite l'esperimento di ATLAS
No full textATLAS è uno dei principali esperimenti al Large Hadron Collider (LHC), situato al CERN, in Svizzera. In tredici anni, ATLAS ha ottenuto notevoli risultati, tra cui la scoperta del Bosone di Higgs nel 2012, ma il Modello Standard è ancora oggetto di studio. In quest'ottica, il riconoscimento del sapore dei quark ha un ruolo importante per identificare processi interessanti. In questa tesi, la misura del bosone W prodotto in associazione con un quark charm è l'argomento principe. In questa analisi, la determinazione del sapore dello charm e del quark strange nel protone, da cui deriva la produzione del W e dello charm, sono di fondamentale importanza, sia per la misura della sezione d'urto, sia per migliorare la precisione sulla strange distribution function. In questa tesi, verranno esposte tutte le tecniche di analisi sviluppate per la misura del processo, riportando i risultati finali della sezione d'urto differenziale e totale con relative incertezze statistiche e sistematiche. La seconda parte del lavoro di dottorato concerne la problematica di riconoscimento di un singoletto di colore, come il bosone di Higgs, da un'altra configurazione, come un gluone, sfruttando la definizione di variabili sensibili al colore, a partire dall'identificazione del sapore di due b-quark. In questa tesi verranno esposti i risultati promettenti, i quali sono stati pubblicati in un articolo.ATLAS is one of the main experiments at the Large Hadron Collider (LHC), located at CERN, Switzerland. In thirteen years, ATLAS has achieved notable results, including the discovery of the Higgs Boson in 2012, but the Standard Model is still under study. From this perspective, the recognition of quark flavour plays an important role in identifying interesting processes. In this thesis, the measurement of the W boson produced in association with a charm quark is the main topic. In this analysis, the determination of the flavour of the charm and the strange quark in the proton, from which the production of the W and the charm derives, are of fundamental importance, both for the measurement of the cross section and for improving the precision on the strange distribution function. In this thesis, all the analysis techniques developed for measuring the process will be exposed, reporting the final results of the differential and total cross section with related statistical and systematic uncertainties. The second part of the doctoral work concerns the problem of recognising a color singlet, such as the Higgs boson, from another configuration, such as a gluon, exploiting the definition of color-sensitive variables, starting from the identification of the flavour of two b-quarks. In this thesis the promising results will be exposed, which have been published in an article
Advanced management for resilient and sustainable Multi-Energy Systems
Get PDFL'abstract è presente nell'allegato / the abstract is in the attachmen
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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