1,720,971 research outputs found
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
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
Investigation of principal reactive pathways in CO2 plasmas by numerical techniques
Full text linkA resource-efficient Europe is the flagship initiative of the Europe 2020 strategy, with the CO2 emissions control as its backbone activity. Within this framework, the main idea of this study is to investigate a novel approach that aims to convert biogas into chemicals and fuels. Central in the approach, is the use of a plasma to store energy in chemical bonds. This thesis presents a study on principal pathways in a CO2 plasma and a first application of numerical reduction techniques to reduce the chemistry
Data analysis of an optical emission spectroscopy diagnostic in NIO1 experiment
Full text linkNeutral Beam Injectors (NBI’s) will play a key role in future fusion reactors,
but many open issues are still to be solved. Consorzio RFX in Padova
will host the test bed for ITER NBI’s, with the aim of demonstrating the
reliability of the present NBI design and of optimizing the performances.
For this reason, another more flexible experiment has started named NIO1
(Negative Ion Optimization phase 1). In the process to study these new concepts
and solutions, the measurements of the plasma parameters and of the
extracted beam are of fundamental importance. A key diagnostic is the Optical
Emission Spectroscopy (OES): its exploitation on NIO1 is the subject
of this thesis. An overview of OES measurements and the methods adopted
to analyze them will be given in the following chapters. Some of the plasma
parameters could be deduced from OES only by comparison with the predictions
of radiative models. The collisional radiative model that has been
applied in this thesis is called YACORA and has been developed by IPP
Garching. Here is an outline of the thesis:
Chapter 1: Introduction to the physics of controlled thermonuclear fusion
and the structure of neutral beam injectors.
Chapter 2: A general overview of NIO1 experiment, diagnostic methods,
in particular the Optical Emission Spectroscopy. Also the CR model is
presented.
Chapter 3: Analysis of measurements in air as a working gas. Both high
and low resolution spectrometers are utilized. The main results are
presented, such as electron temperature (Te), vibrational temperature
(Tv) and rotational temperature (Tr).
Chapter 4: The analysis of measurements with hydrogen as a working gas
is presented. The main quantities obtained with measurements of low
resolution spectrometer are: electron density (ne) and electron temperature
(Te) along the LOS (line of sight) and Dissociation degree
(nH=nH2 ). These are obtained by the method of line ratio and with
the use of the CR model. The results and the errors of these estimates
are presented and discussed.ope
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
- …
