1,720,958 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
Design and Development of Adaptive Intrusion Management for Cyber-Based Systems
Get PDFWith the growing Cyber-security threats to governmental and organizational infrastructures, the need to develop high resilient Cyber-Based Systems (CBSs) that preserve the security of data is becoming increasingly important. A prominent type of Cyber-attacks is intrusion attacks that aim at data tampering, which can impair the confidentiality and the integrity of data. Therefore, it is imperative to design a holistic intrusion management approach for CBSs.In this dissertation, we address the challenges of designing and developing a resilient intrusion management system. In particular, we propose an adaptive data Partitioning-based Intrusion Management System (PIMS) that can endure intense malicious intrusion attacks on Database Management Systems (DBMSs). The novelty of PIMS is a data partitioning scheme that provides the ability to contain the damage in confined partitions. We formulate the demarcation problem as a dual-objective optimization problem and prove that it is NP-hard. Accordingly, we propose two heuristic solutions for the problem. Furthermore, PIMS incorporates a novel partition-based response and recovery mechanisms, which executes compensating transactions to automatically repair the damage caused by the intrusion attacks. Then, we consider access-controlled skewed workload, in which the transactions are executed based on a specified access control policy and the data objects are accessed non-uniformly. We formulate the related demarcation problem and propose two heuristics. The new problem has significantly less number of variables as compared to the original demarcation problem. We present a Malicious Transaction Benchmark (MTB) to evaluate the performance of the proposed intrusion management systems. The novelty of the MTB is the ability to generate transactional workload and to orchestrate various attacking scenarios.Then, we extend the functionality of PIMS to design a time-aware Threat Management System (TMS) for Data-driven IoT-based Collaborative Systems (DIoTCS). The novelty of the TMS is confining the damage into partitions based on the execution time-constraints specified by the DIoTCS applications. We model the execution time- constraints of the DIoTCS applications and then formulate the partitioning problem as a cost-driven optimization problem. We prove that the partitioning problem is NP-hard and accordingly propose two efficient heuristics. We evaluate the TMS using the MTB and demonstrate that intelligent data-partitioning improves the overall availability of the DIoTCS
Optimal Node Placement in Underwater Acoustic Sensor Network
No full textAlmost 70% of planet Earth is covered by water. A large percentage of underwater
environment is unexplored. In the past two decades, there has been an increase in the
interest of exploring and monitoring underwater life among scientists and in industry.
Underwater operations are extremely difficult due to the lack of cheap and efficient
means. Recently, Wireless Sensor Networks have been introduced in underwater
environment applications. However, underwater communication via acoustic waves is
subject to several performance limitations, which makes the relevant research issues
very different from those on land. In this thesis, we investigate node placement
for building an initial Underwater Wireless Sensor Network infrastructure. Firstly,
we formulated the problem into a nonlinear mathematic program with objectives of
minimizing the total transmission loss under a given number of sensor nodes and
targeted volume. We conducted experiments to verify the proposed formulation,
which is solved using Matlab optimization tool. We represented each node with a
truncated octahedron to fill out the 3D space. The truncated octahedrons are tiled in
the 3D space with each node in the center where locations of the nodes are given using 3D coordinates. Results are supported using ns-3 simulator. Results from simulation
are consistent with the obtained results from mathematical model with less than 10%
error
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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