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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
Analysis of collision centrality and negative pion spectra in 7Be + 9Be interactions at CERN SPS energy range
Get PDFPraca doktorska została napisana w ramach eksperymentu NA61/SHINE znajdującego się
przy akceleratorze Super Proton Synchrotron w ośrodku CERN.
Program eksperymentu NA61/SHINE składa się z trzech części:
• Badanie materii oddziałującej silnie
• Precyzyjne pomiary produkcji hadronów dla eksperymentów neutrinowych
• Precyzyjne pomiary produkcji hadronów dla eksperymentów badających
promieniowanie kosmiczne
Niniejsza praca dotyczy programu badania materii oddziałującej silnie, a w szczególności
pomiarów obserwabli związanych z przejściem fazowym między gazem hadronowym, a
plazmą kwarkowo-gluonową.
Praca zawiera analizy przeprowadzone dla zderzeń 7Be + 9Be przy pięciu pędach wiązki: 19A,
30A, 40A, 75A, 150A GeV/c.
Głównym wynikiem pracy jest pomiar dwuwymiarowych widm ujemnie naładowanych
pionów produkowanych w nieelastycznych oddziaływaniach 7Be + 9Be. W celu identyfikacji
pionów użyto metody „h-" bazującej na fakcie, że większość wyprodukowanych ujemnie
naładowanych cząstek to piony. Niewielki wkład od pozostałych hadronów został odjęty za
pomocą symulacji Monte-Carlo. Otrzymane widma zostały poprawione na efekty detektorowe
oraz piony produkowane w oddziaływaniach słabych za pomocą symulacji Monte-Carlo.
Wyniki pomiarów porównano z danymi zmierzonymi w oddziaływaniach p + p oraz Pb + Pb.
Widmo masy poprzecznej mezonów n- w zderzeniach 7Be + 9Be wykazuje wzmocnienie dla
dużych wartości masy poprzecznej w stosunku do danych p + p, sugeruje to istnienie
kolektywnego pływu radialnego w badanych zderzeniach.
Szerokość rozkładu pospieszności mezonów n- wykazuje brak monotoniczności względem
wielkości zderzanego układu. Efekt ten został zinterpretowany jako brak symetrii izospinowej
w zderzeniach p + p oraz Pb + Pb. Wprowadzenie poprawki izospinowej do danych p + p
spowodowało przywrócenie monotoniczności.
W celu otrzymania widm ujemnie naładowanych pionów należało wykonać pewne pomiary
pomocnicze. W szczególności w pracy opisano:
• Cięcia jakościowe w celu wybrania dobrze zmierzonych oddziaływań 7Be + 9Be z
wtórnej (zawierającej wiele innych rodzajów cząstek poza 7Be) wiązki o
skomplikowanej strukturze czasowej.
• Pomiar nieelastycznego przekroju czynnego oraz przekroju czynnego na produkcję
cząstek w zderzeniach 7Be + 9Be.
• Pomiar i parametryzacja profilów kaskady hadronowej w kalorymetrze używanym
do określenia centralności zderzenia.
• Określenie centralności zderzenia
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
The NA61/SHINE Experiment at the CERN SPS
Get PDFThe aim of the NA61/SHINE ion programme is to explore the QCD phase diagram within the range of thermodynamical variables accessible by the SPS. In addition, the experiment provides precision hadron production measurements for description of the neutrino beam of the T2K experiment at J-PARC and for simulation of cosmic-ray showers for the Pierre Auger Observatory, KASCADE-Grande and KASCADE experiments. The main physics goals of the NA61/SHINE ion programme are the study of the properties of the onset of deconfinement and the search for signatures of the critical point of strongly interacting matter. These goals are pursued by performing an energy (beam momentum 13A–158AGeV/c) and system size (p + p, p+Pb, Be+Be, Ar+Ca, Xe+La) scan. The architecture and performance of the detector will be discussed. Moreover, an overview of the recent NA61/SHINE status, results and plans will be presented
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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