1,721,293 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
Functionalized Inorganic Semiconductor Nanomaterials: Characterization, Properties, and Applications
No full textThis eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contac
Functionalized Inorganic Semiconductor Nanomaterials: Characterization, Properties, and Applications
No full textThis eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contac
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
Simultaneous Analysis of Diosgenin and Sarsasapogenin in Asparagus officinalis Byproduct by Thin-layer Chromatography
No full textIntroduction - Asparagus officinalis L. has several biological activities including antifungal, antiviral and antitumoral activities due to the steroidal saponins. Normally diosgenin and sarsasapogenin are analysed separately by thin-layer chromatography or high-performance liquid chromatography (HPLC-UV or HPLC-ELSD), which is time-consuming and expensive, so we need to find a rapid solution to this problem
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
Matrix exponential integrator algorithm for accurate and efficient simulation of power converter systems
No full textElectromagnetic transient simulation has become a prominent method for intricate power system design and analyses. Current research emphasizes the challenges that arise in developing a computational algorithm for efficient and accurate simulations of power systems due to the conjoined behaviour of continuous states and discrete events. Common methodologies, known as discrete state event driven (DSED) approaches, aim to overcome the modeling hindrances through employing a fixed or variable simulation step-size and integration order that reduces the number of computational points required to achieve high accuracy with accelerated transient simulation.
The exponential-integrator-based simulation algorithm proposed is a novel variable-step fixed-order (VSFO) method that performs sequential intermediate integration calculations between the discrete events throughout the simulation. The matrix exponential integrator portion of the algorithm offers a competitive approach for an accurate, numerically efficient, and stable technique to accelerate transient simulation. Furthermore, the algorithm is easily adapted to accommodate stiff or nonstiff circuit systems which complement the desired topology and parameters. This thesis conducts a comprehensive analysis of the foundational aspects of the theoretical model for an exponential integrator algorithm and its practical applications for simulation of power converter systems. In addition, the simulation based case studies are presented for the validation of the algorithm, and provide insightful perspective and approach to converter control modeling and operating principles. A three-phase two-level AC/DC converter, a three-phase two-level AC/DC/AC converter, and a six-pulse rectifier are simulated by the proposed matrix exponential integrator algorithm. These case studies are typical and commonly used converter typologies with active and passive switching events. They demonstrate the proposed algorithm’s ability to accurately capture the hybrid nature of events within the system before each execution of a simulation cycle. The comparison of CPU times of the proposed exponential integrator algorithm to the models built by Simulink/Simscape Electrical toolbox show the simulation efficiency improvements are 2.3749913 s to 15.8125000 s for Case Study One, 8.5514098 s to 15.6562500 s for Case Study Two, and 0.2655774 s to 2.7656250 s for Case Study Three.Applied Science, Faculty ofEngineering, School of (Okanagan)Graduat
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