1,720,955 research outputs found
Towards High-Performance, Low-Overhead Integrity Authentication for Secure-Memory in Embedded and Heterogeneous Computing Platforms
Get PDFThe use of secure-memory has been crucial for embedded and heterogeneous computing systems, especially in the light of emerging memory adversaries. The state-of-the-art hardware platforms targeting different sectors such as Internet-of-Things (IoT) and cloud computing require strong protection against memory exploits through different side-channel attacks. Such a tamper-resistant memory system comprises different security techniques such as encryption and integrity protection. Generally, the integrity protection against the adversarial attacks in secure-memory platforms relies on integrity trees such as the Bonsai Merkle Tree (BMT). However, the highly-recursive authentication and update algorithms associated with such tree structures are challenging to implement in heterogeneous systems with domain-specific acceleration (such as FPGA) for secure-memory. In the scope of this dissertation, we talk about four research works that highlight novel algorithmic, microarchitectural and logic design techniques for high-performance integrity authentication processes in secure-memory platforms. The first work focuses on hardware-efficient verification of the memory integrity with lazy-update BMT on an FPGA-based secure embedded system. It proposes an innovative partitioned parallel cache structure that leverages the unique reconfigurable capability of modern FPGA devices and successfully circumvents the hardware implementation challenges due to the recursiveness in lazy-update methods. The second work, HMT, is a hardware-friendly BMT algorithm that enables the verification and update processes to function independently. The HMT algorithm is hardware-targeted, parallel and it relaxes the update depending on BMT cache hit but makes the update conditions more flexible compared to lazy update. The third work, OMT, devises a run-time adaptive and unified BMT framework that can protect both volatile and non-volatile memory systems with optimal performance. Finally, CTR+ introduces a novel metadata access scheme to ensure significant BMT overhead reduction through speculative verification and concurrent secure computation
Statistical Analysis of a Channel Emulator for Noisy Gradient Descent Low Density Parity Check Decoder
Get PDFThe purpose of a channel emulator is to emulate a communication channel in real-life use case scenario. These emulators are often used in the domains of research in digital and wireless communication. One such area is error correction coding, where transmitted data bits over a channel are decoded and corrected to prevent data loss. A channel emulator that does not follow the properties of the channel it is intended to replicate can lead to mistakes while analyzing the performance of an error-correcting decoder. Hence, it is crucial to validate an emulator for a particular communication channel. This work delves into the statistics of a channel emulator and analyzes its effects on a particular decoder
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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