1,720,967 research outputs found
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
Management Support of Travel Company Mtrips using BI Tools
No full textThe aim of the master thesis is to design and implement a Business Intelligence solution for travel company M-trips. The purpose of the solution is to create various BI systems that will allow you to provide management support and optimize some business processes to minimize the company's risks. At the beginning of the thesis, there is a motivation for the solution to be processed, as well as a business assignment that states the company for which the solution is developed and also lists the individual reasons for the interest in the solution. This is followed by the data assignment of the project, where the production systems are defined as well as the company's requirements for the solution. The following part of the thesis describes the implementation of the solution. From data extraction from production systems to the actual distribution of the solution to end users. In the last chapters, business and technical tests of the previously presented solution are carried out, as well as specific conclusions are provided for the implementation, and then the use of the developed BI tools with a proposal for the strategic and operational development of the company in the future.Cílem diplomové práce je navrhnout a implementovat řešení Business Intelligence pro cestovní společnost M-trips. Účelem řešení je vytvořit různé BI systémy, které umožní poskytovat podporu řízení a optimalizovat některé podnikové procesy tak, aby byla minimalizována rizika společnosti. Na začátku práce je motivace ke zpracování řešení a business zadání, kde je uvedena společnost, pro kterou je řešení vyvíjeno a také jsou uvedeny jednotlivé důvody zájmu o řešení. Následuje zadání dat projektu, kde jsou definovány výrobní systémy a požadavky firmy na řešení. Následující část práce popisuje implementaci řešení. Od extrakce dat z produkčních systémů až po samotnou distribuci řešení koncovým uživatelům. V posledních kapitolách jsou provedeny obchodně-technické testy dříve představeného řešení, dále jsou uvedeny konkrétní závěry pro implementaci a následně využití vyvinutých nástrojů BI s návrhem strategického a provozního rozvoje společnosti v budoucnu
Zinc-rich coatings for improved corrosion resistance of extruded aluminium heat-exchange tubing in acidified chloride solution
No full textThin walled heat exchanger Al alloy tubes, with solid-solution Zn-rich surface, are widely used by the automotive industry and are considered by the heat, ventilation, air-conditioning and refrigeration market. This work investigates protection of Al surface with Zn-rich layers for improved corrosion resistance of Al tubes against pitting.
Zinc was applied on AlMn alloy extruded tubes by thermal-arc spraying. The tubes were subsequently subjected to heat treatment at various temperatures and durations to obtain solid-state AlZn alloy diffusion layer at the surface with varying thickness and Zn concentration profiles. Concentration depth profiles were obtained by glow discharge optical emission spectroscopy (GD-OES). Corrosion rate was determined by weight loss resulting from immersion for predetermined times in acidified artificial sea water solution of pH 3.
The as-sprayed Zn coating was found to be highly non-uniform which resulted in non-uniformity of the Zn-rich layers laterally and in depth. Thickness of Zn-rich layer increased with heat treatment time and temperature, while Zn concentration at the surface decreased. Zn-rich layers were found capable of protecting the AlMn alloy substrate against pitting at the expense of increased self-corrosion rate. SEM and EDS area analysis of corroded samples after immersion test showed that corrosion of Zn-rich layers was non-uniform due to non-uniformity of the layers themselves. Regions with higher Zn concentration, ρZn, corroded first and protected galvanically regions with lower ρZn. The well-known relationship between the corrosion potential of AlZn alloys and Zn concentration was extended over a wide concentration range using ρZn of corroded areas and related further to the corrosion rate in acidified synthetic seawater. The database thus developed is useful for optimizing the Zn-rich layer thickness and Zn concentration profile in the layer to minimize uniform corrosion, and therefore maximize service lifetime, without reducing the protection against pitting.Digital fulltext not availabl
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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