1,720,965 research outputs found
A Bibliometric Analysis-Based Review on Green IT
Get PDFWith the increasing global greenhouse gas emission (GHGE) from ICT usage, several research projects have been conducted in the areas for Green IT development (such as optimal resource allocation algorithms, deterministic heuristics approaches) and Green IT deployment (integrated framework approach). Although there was significant progress in Green IT research during the period of 2008–2013, it has declined gradually in recent years. The findings from all of these Green IT research play a vital role in improving the resource optimisation, which can result in GHGE from ICT usage. This book chapter presents the findings from bibliometric analysis, co-authorship and citation network analysis on Green IT articles. The findings show that the numbers of total related articles increased from 2008 to 2013 and gradually decreased in recent years. USA, Germany, India, Australia and England are the leading countries. The high average citations of articles from Australian scholars reflect their significant academic value in this Green IT research area, although the funding support from Australia research council on Green IT is comparatively low. There is a need to encourage more academic collaborations with co-authorship to share experiences, knowledge and skills for more innovative solutions. The citations among articles from worldwide are widely distributed and well linked among articles from various countries and academic institutions
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
Electrochemistry of ferrocene derivatives relevant to their use in measuring state of charge of lead acid batteries
Get PDFThe electrochemistry of some ferrocene compounds coated on gold electrodes in concentrated sulphuric acid solutions in the concentration range 1–5 M has been investigated. The objective of this work was to investigate whether such compounds could be used to determine, potentiometrically, the state of charge of lead-acid batteries. The investigated ferrocenes included, simple ferrocene, poly(vinylferrocene), bridged ferrocenes in which the two cyclopentadienyl groups are linked by –CH2– chains of vary lengths and alkanethiol substituted ferrocenes.
Each of the investigated ferrocenes were found to undergo one electron reversible oxidation/reduction at the surface of the electrode. Their anodic and cathodic peak potentials were independent of pH in the range 2–10 in aqueous solutions of K2SO4, KCl and NaClO4. However, in concentrated acid solutions (H2SO4, HCl and HClO4) the anodic and cathodic peak potentials shifted, almost linearly, to less positive potentials with increasing acid concentration. The attachment of alkanethiol group to the ferrocene molecules improved the retainability at the gold electrode surface which is possibly linked to strong chemisorption of the thiol group on the gold surface. The retainability and chemical stability of the ferrocene compounds at the gold electrode surface were found to be higher in ClO4– than in Cl– and SO42– media which is postulated to be related to the salt formation between the anion and the ferricenium ion generated on oxidation. The bridged ferrocenes were found to be chemically more stable than simple ferrocene. The presence of a carbonyl group in the alkanethiol chain generally decreased the chemical stability of the ferrocene compounds in aqueous acidic media but more so in SO42– than in ClO4– media. Of all the investigated ferrocenes, the potentiometric response of the 1,1`-Bis(11-mercaptoundecyl)ferrocene redox couple was found to be the most stable and reproducible in concentrated sulphuric acid. Hence this couple has the potential of measuring the change in the acid concentration corresponding to the state of charge of lead-acid battery. Long term stability of the material in concentrated sulphuric acid, however, is not good. The material survived for only 15 days. Further work on identifying more stable ferrocene couples is needed
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
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