1,720,963 research outputs found
Patterns 2024 : The Sixteenth International Conference on Pervasive Patterns and Applications, April 14-18, 2024, Venice, Italy
No full text
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
On the evolvability of the TCP-IP based network firewall rule base
No full textAbstract: A firewall is an essential network security component. The firewall rule base, the list of filters to be applied on network traffic, can have significant evolvability issues in a context where companies consider their firewall as complex. While sufficient literature exists on how to analyze a rule base, little research is available on how to properly construct a rule base upfront which prevents the occurrence of evolvability issues. According to Normalized Systems theory, a system is unstable under change if changes require an effort that is proportional to the type of change and the size of the system. A system that is unstable under change is considered non-evolvable. The issue with firewall changes relates to this instability under change. By analyzing the root cause of the evolvability issues and proposing design criteria making use of Normalized Systems theory, we attempt to solve the evolvability issues of TCP/IP-based firewalls. This work presents a set of design criteria to create an exante proven evolvable rule base, as well as an algorithm which performs an essential step in converting an existing non-evolvable rule base into an evolvable rule base
Ontological analysis of the evolvability of the network firewall rule base
No full textAbstract: The TCP/IP based firewall is a notorious non-evolvable system. Changes to the firewall often result in unforeseen side effects, resulting in the unavailability of network resources. The root cause of these issues lies in the order sensitivity of the rule base. It is not only essential to define the correct rule. The rule must be placed at the right location in the rule base. As the rule base becomes more extensive, the problem increases. According to Normalized Systems, this is a Combinatorial Effect. This paper studies the ontology of a rule base and its implementation in an actual firewall. Based on this study, we explain why existing firewalls do not prevent evolvability issues. A new ontological model and implementation are proposed, using Normalized Systems, which drastically increases the firewall rule base\u2019s evolvability
Usage of iterated local search to improve firewall evolvability
No full textAbstract: The Transmission Control Protocol/Internet Protocol (TCP/IP) based firewall is a notorious non-evolvable system. Changes to the firewall often result in unforeseen side effects, resulting in the unavailability of network resources. The root cause of these issues lies in the order sensitivity of the rule base and hidden relationships between rules. It is not only essential to define the correct rule. The rule must be placed at the right location in the rule base. As the rule base becomes more extensive, the problem increases. According to Normalized Systems, this is a Combinatorial Effect. In previous research, an artifact has been proposed to build a rule base from scratch in such a way that the rules will be disjoint from each other. Having disjoint rules is the necessary condition to eliminate the order sensitivity and thus the evolvability issues. In this paper, an algorithm, based on the Iterated Local Search metaheuristic, will be presented that will disentangle the service component in an existing rule base into disjoint service definitions. Such disentanglement is a necessary condition to transform a non-disjoint rule base into a disjoint rule base
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
- …
