1,721,001 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
Novel slow light waveguide with controllable delay-bandwidth product and utra-low dispersion
No full textWe demonstrate a novel type of slow light photonic crystal waveguide which can produce unusual "U" type group index - frequency curves with constant group index g n(g) over large bandwidth. By shifting the boundaries of this waveguide, flexible control of g n(g) (10 < n(g) < 210) with large bandwidth (1nm<Delta lambda<43nm centered at 1550nm) and normalized Delay-Bandwidth Product (0.1363<DBP<0.3143) are achieved. Additionally, depending on the chosen waveguide geometry, extremely low group velocity dispersion (GVD<0.5 ps.nm(-1).mm(-1)), with controllable group velocity dispersion of both signs is obtained. (C) 2010 Optical Society of America
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
Evolutionary Multi-Objective Optimization for Computation Offloading in Collaborative Edge-Cloud Computing
Get PDFMany real-world problems involve multiple and conflicting objectives to be optimized simultaneously, which are formulated as multi-objective optimization problems (MOPs). In general, problems with more than three objectives or a large number of decision variables are referred to as many-objective or large-scale optimization problems (MaOPs or LSMOPs), respectively. Recently, a variety of multi-objective evolutionary algorithms (MOEAs) inspired by nature have been developed to solve MOPs. However, the performance of MOEAs often deteriorates when faced with many-objective or large-scale optimization. In addition, these MOEAs using the classical Pareto dominance principle face no strong selection pressure towards the Pareto front with regard to many-objective optimization. Furthermore, it is difficult for a limited population size to explore the high-dimensional search space of large-scale optimization.
With the development of the Internet of things (IoT) and mobile networks, more and more computation-intensive and latency-critical applications are deployed to mobile devices. Due to some limitations inherent to mobile devices including limited computing capability, storage space, and battery lifetime, these applications cannot run efficiently on mobile devices. To address this issue, computation offloading in mobile cloud and edge computing (MCC and MEC) provides a promising paradigm to migrate computation-heavy parts of mobile applications to the cloud and edge servers. Hence, MCC and MEC computation offloading may involve different objectives such as reducing time and saving energy. Offloading decision making can be described as multi-criteria optimization and we develop efficient MOEAs to solve different computation offloading models.
This work covers evolutionary multi-objective optimization for computation offloading in collaborative MCC and MEC. Its main content includes two parts: (i) evolutionary multi-objective optimization and (ii) optimization in offloading. Specifically, the contributions of this thesis can be summarized as follows:
Proposing a multi-objective artificial bee colony algorithm based on decomposition to improve convergence and diversity for solving normalized and scaled MOPs.
Developing a many-objective evolutionary algorithm with adaptive weight vectors for dealing with normalized and scaled MaOPs.
Designing a novel archive maintenance for adapting weight vectors in decomposition-based evolutionary algorithms for handling MOPs and MaOPs with irregular Pareto fronts.
Proposing three constrained MOEAs to deal with constrained MOPs as well as offloading problems in IoT-edge-cloud computing networks.
Exploring and comparing two evolutionary large-scale sparse multi-objective optimization algorithms for tackling collaborative edge-cloud offloading problems.
Studying a novel multi-objective computation offloading algorithm to solve offloading problems with the consideration of compression, security and mobility
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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