1,720,960 research outputs found
(Cyber) Security Challenges in Critical Infrastructures, focusing on the Aerospace Industry
No full textThis presentation is focused on the cyber security challenges that aviation stakeholders might face. The presentation is divided into two parts. Firstly, Part A introduces the ideas of Critical Infrastructures, Safety-Critical Systems and their associated general challenges with respect to safety and security. Part B is focused on Aviation stakeholders and what cyber security challenges they might face within their systems architectures and technologies utilized
Introduction to data encryption with RSA
No full textThe presentation aims to show how data encryption within the RSA cryptosystem works and what vulnerabilities may appear in case of misconfigurations. The document is revealing how at a high-level the key generation and data transmission works, but also, how mathematically this process is securing the communications and the data in transit. Adjacent with this subject, the history of the RSA as well as its purpose in use were included to enhance the knowledge-sharing
Contribution to a secure urban air mobility
No full textFollowing the permanent upscaling of the number of unmanned air vehicles applying to enter the airspace, the need for re-structuring of the flow of air traffic gets more and more important. Multitudes of research groups around the world are proposing comparable, yet in detail slightly differing approaches to establish the urban air mobility of the future. The urban air mobility of the future will utilize all kinds of ever-emerging new technologies while posing the need to be connected to legacy systems present in aviation. This is on the other hand a door opener and invitation for malicious subjects to invent innovative new attacks of different kind. As the attack surface is tremendously widened by the grow of urban air mobility, the need to keep the security-by-design principle has to be emphasized.This paper addresses the first development steps of a security perimeter for urban air mobility to already consider security in a holistic and system-wide manner during the design phase and beyond
Aviation Security Lab: A testbed for security testing of current and future aviation technologies
No full textThe continuous development and integration of new technologies in the aviation industry has increased the pool of active systems in use, and thus, the attack surface. The aircraft, as one central element in aviation, have followed the same trend. To accommodate current and future needs of onboard avionics intercommunication, the standard Avionics Full-Duplex Switched Ethernet has been created and implemented in several aircraft in recent decades. While this standard suggests security measures for the onboard networks, there may exist potent threat actors which can surpass the measures and pose significant security risks. Therefore, a brief discussion on the type of actors and general threats will be presented. This paper will inform on circumstances which can lead to security breaches, and further report on the simulation of one threat scenario. The environment providing the simulation capabilities is the Aviation Security Lab, a testbed designed for security applications in aviation. The current status of the testing environment is also described towards the end of this paper
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
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