1,721,135 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
An architecture for secure provisioning and usage of IOT services
No full textThe growth in the internet of things plays a central role in the future internet having a common platform for a complex network of computers, wired and wireless sensors, actuators and radio frequency identification devices. Our simplified view of this complex network is of a ‘network that provides various services’; let’s call it the internet of services. There is though a lack of a platform that can bring together the services offered by the internet of things/internet of services and the future user of these services. In this thesis, an architecture has been proposed for providing secure services to connected users. We propose a layered architecture that has an application layer, a service layer and a sensing-network layer to accommodate the requirements of the internet of services in a timely and effective manner.
In this architecture, the end to end data communication security of the internet of services has been taken into consideration. A web security interface has been introduced, which provides security for user credentials. This interface is introduced in the application layer to protect and ensure data communication security using a single sign on. We have proposed a node to node communication security solution after considering the vulnerabilities and threats around connecting a future integrated service. We have designed and evaluated our architecture by performing a range of experiments. These experiments were conducted using database connection round trip time, total execution code round trip time and average query round trip time to compare the services that were designed on different programming platforms
Cloud adoption hurdles, competence model, and opportunities in the African context: proof from Ethiopia
Full text linkCloud computing refers to both the resources provided over the internet as services and the systems software and hardware in the data centres that provide these resources. These resources can then be used by users for various purposes and provide the benefits of low ongoing cost, more computational power, and optimization of processes of computing among others. To take advantage of these benefits, adopting the cloud and the cloud computing paradigm is a necessary step and has the potential to transform Information Technology (IT) capabilities in developing and under-developed countries. However, in these countries, currently there are some adoption hurdles around this technology. Government agencies need to balance and regulate both hurdles and hype around the technology. Before cloud can be widely adopted, a systematic model of cloud adoption needs to be designed which can help the agencies in charge to navigate the hurdles and the hype. In this work, we have studied this problem in the context of adoption in Africa. The aim of this research is to investigate local cloud adoption threats, hurdles, synergies, opportunities, human capabilities, and other disciplines’ theories to design a model which will serve as a guide to the local cloud adoption hurdles in the African context, especially in Ethiopia. More specifically, the key intention and goal of this research is twofold: first, to assimilate the existing game theory and reverse engineering theory, that is, the part of economic theory into the cloud adoption techniques, and second, to look at the effects of open source cloud computing resources on the reduction of aforementioned hurdles via experimentation with OpenStack. The OpenStack is used as a test-bed for the designed mechanism for building a private cloud for the targeted organization to examine the competence of IT experts and pave the way for future research.
The model is designed through various context-based competence possibilities for academia and government. It can be used to mitigate the bottlenecks that arise from the lack of up-to-date cloud knowledge, the lack of a context-based model, the lack of government control, and the lack of well-poised competent IT experts. These bottlenecks lead to the lack of hands-on technical skills, confusion in cloud adoption lack of standard models, under-utilizations of the opportunities of open source cloud platforms, and loose interpretations around the security, trust, legal, regulatory model, control mechanism, and privacy issues.
This research is foundational in nature which assimilates and translates well-established theories of other disciplines into a theory of systematic cloud adoption. The assimilated model minimizes the cloud adoption hurdles by maximizing government power to facilitate, regulate, understand the cloud adoption complexity, and control the cloud adoption rate. It is also a useful lens for cloud experts to see how each hurdle is paired up with some opportunities as it maximizes their competence
Progger 3: A low-overhead, tamper-proof provenance system
Full text linkData provenance, which describes how data is accessed and used since the time it is created, is a valuable resource with a wide range of uses. It can be used simply to know who has accessed one's data, or be used in more complex scenarios such as detecting malware. One method for collecting data provenance is to observe system calls. This thesis presents Progger 3, a system that observes system calls on Linux in order to collect data provenance. There are several existing provenance systems that observe system calls, but they have limitations regarding security, efficiency, and usability. Progger 3 remedies many of these limitations. As a result, Progger 3 is a working implementation of a provenance system that can observe any system call, guarantee tamper-proof provenance collection as long as the kernel on the client is not compromised, and transfer the provenance to other systems with confidentiality and integrity, all with a relatively low performance overhead
Improving cyber defence for critical national infrastructure in New Zealand
No full textThe challenge of securing comprehensive services enabled by cyber-physical technologies is becoming increasingly acute. Industrial Control Systems (ICS) and Operational Technology (OT) environments have been in place for several decades. With a combination of computer software, hardware components and industrial/commercial use, these systems are essential in the control and automation of countless industrial procedures and processes that provide indispensable human services in most countries; they make it possible to operate and maintain such operations as the flow of energy through power grids, the treatment and supply of clean water to billions of people, and the maintenance of life saving medical facilities around the world.
This research aims to critically analyse New Zealand's existing cybersecurity strategies and approaches in its defence of Critical National Infrastructure (CNI) organisations operating OT and ICS environments. In this regard, the research draws on international best practices, and proposes a set of hypotheses and actionable insights to fortify cyber resilience for CNIs. It also explores how government-enforced frameworks and standards improve cyber defence for CNIs along with improved accountability. Learnings from this research may be used by policy makers, cyber security leaders, and the government of New Zealand in their consideration of and consultations on academic and pragmatic application, for the development or adoption and enforcement of cyber security standards for CNIs in New Zealand. The essence of this thesis lies in its commitment to contributing to the broader discourse on cybersecurity for OT and ICS environments--particularly in safeguarding critical infrastructures--thereby enhancing the security and welfare of nations in a dynamically changing threat landscape.
To achieve the aforementioned aim, this thesis undertakes an analysis of cyber security standards and frameworks that governments around the globe--especially within the countries represented in the Five Eyes intelligence alliance comprising Australia, Canada, New Zealand, the United Kingdom, and the United States--have enforced for CNIs operating OT and ICS environments. Additionally, the thesis examines whether there are other geographies that are a closer fit culturally and economically for New Zealand to learn from and to emulate when it comes to considering future strategies for improving cyber defence for CNIs. This thesis further explores how systematic, strategic, and collaborative efforts in combination with government enforced frameworks and standards improve cyber defence for CNI and OT and ICS environments. It is guided by comparative analysis, utilizing both qualitative and quantitative data, including policy document reviews, expert interviews, and studies of international best practices
Variations on the Author
Full text link“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
Full text linkWe 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
Full text linkWe 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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