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Persona concept : system architecture and prototypes
Get PDFThis project explores a security framework, called the Persona Concept, aimed at giving the user greater control over their private data in cyberspace, in particular, their electronic credentials. The background for the Persona Concept, along with the requirements identified can be found in three (3) technical publications produced by Kal Toth and myself in 2003 (see list of references [1], [2] and [3]).
The Persona Concept uses a Persona Server as the secure storehouse for persona data such as credit card and bank account identifiers as well electronic credentials such as X.509 certificates. The data is secured using public key encryption. The server component interacts with the user via a Persona Client which obtains X-509 Certificates on behalf of the user from a Certification Authority (CA) service. Interaction among the various components (Persona Server, Persona Client and Certification Authority) is enabled by the use of Web Services.
This project focused on managing the user data across these components including the creation, secure storage and retrieval of Persona data to and from the Persona Server using Simple Object Application Protocol (SOAP) and under the control of public key encryption schemes. SOAP is an open XML-based application-level Internet protocol for implementing distributed access to object-oriented services deployed on the Web. SOAP is designed to allow applications running on a range of platforms to access remote objects and applications on servers across a TCP/IP network. In addition to this, the project built upon the work by Ike Chen (OSU M.S. graduate project in 2004) [4] by enabling X-509 Certificate file transfer between the client and Certification Authority using SOAP (improvements were made to the mechanisms for transferring files, particularly in support of X.509 certificates). A Java-based prototype client called the Persona Client (PC) was created and used in conjunction with a small local password-based security scheme to protect the private key data on the user device.
My project first implemented the upgrade to the Certification Authority services and detailed the various policies surrounding storage of data. I then implemented the Persona Client which enabled me to test the persona services in place. I then implemented the encryption schemes and the server components enabling the secure storage and transfer of Persona Data. Components to create, edit and delete data were packaged and published as services to be used by the Persona Client.
Future extensions of this project could include exploring custom credential generation based on Security Assertion Markup Language (SAML) and Extensible Access Control Markup Language (XACML) which together can be used to specify XML-based credentials and access control policies for an enterprise. Other extensions include the implementation of discretionary and mandatory security policies using XACML to allow users to conduct transactions across various domains
A Study of the Gradient Drift Instability in the High-Latitude Ionosphere Using the Utah State University Time Dependent Ionospheric Model
Get PDFResearch over the years has established that the Gradient Drift Instability process causes small-scale irregularities, mostly along the edges of the high-latitude polar cap patches. Studying these irregularities will help in the development of a Global Scale Ionospheric model, which is a central part of a global space weather forecast system. Much theoretical work has been done with varying degrees of complexity to study this instability in the high latitude patches.
In this work we have used the Utah State University Time Dependent Ionospheric Model to model the high-latitude patches, calculate the growth rate of the instability, and perform a macro-scale study of the phenomenon. This is the first time that real ionospheric values have been used to calculate the growth rate and to provide two-dimensional maps identifying Gradient Drift Instability-caused irregularity regions in the polar cap. Our research shows that regions of intense instability occur along the edges of the tongue of ionization and its throat regions with strong growth rates along the borders of the cusp region
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
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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