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Secure by Simulation: A Novel Timing-Driven Verification of Masked Hardware Designs
No full textMasking uses the principles of secret sharing as a countermeasure for side-channel leakage in digital logic circuits. It allows individual shares to leak independently without revealing the secret. In practice, however, masking shares often leak jointly due to implementation effects in the physical hardware. Circuit-level timing effects create glitches resulting from data dependent timing variations and are a source of side-channel leakage. Existing formal verification tools attempt to model hardware implementation effects as a means for leakage assessment. However, they are frequently based on the generally true properties of a circuit rather than the concrete implementation itself, leading to conservative masked implementations. This work presents a novel approach for masked circuit verification in the presence of glitches using low-level timing simulation. Timing simulation allows for concrete circuit implementation analysis while utilizing common-place chip design tools. Using detailed circuit timing models enables a highly accurate estimate of technology process variations’ impacts, including temperature and voltage, for robustly sized chip designs. The methodology presented in this work is able to quantify timing-based side-channel leakage for the circuit under test. Additionally, examples show the ability to distinguish between leaky and non-leaky masked designs that otherwise appear indistinguishable from traditional formal verification models. This work demonstrates that using circuit timing for masked hardware verification leads to a more efficient concrete circuit implementation and tighter leakage assertion
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
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Noninvasive Assessment of Blood Gases: A wearable prototype measuring PtcCO2 and SpO2
No full textOur project designed and implemented a time-domain dual-lifetime referencing (t-DLR) algorithm used for the measurement of carbon dioxide diffusion through the skin transcutaneously. The algorithm and its associated capturing system were implemented on a luminescence-based transcutaneous carbon dioxide monitor designed with off-the-shelf commercial components, including the ADPD4100 a specialized integrated circuit for luminescence sensing. The t-DLR algorithm allows for a more robust measurement system by using a ratiometric approach to eliminate confounding factors such as changes in the monitor’s optical path that can be a source of inaccuracies. Through the inclusion of the t-DLR algorithm, the monitoring device can be progressed further toward a potential remote patient monitoring system. A secondary aspect of this project was the development of an additional monitoring application for the board with the inclusion of a pulse oximetry system that uses a photoplethysmograph (PPG) sensing technique. The PPG waveforms are used to estimate peripheral oxygen saturation, heart rate, and respiration rate. In adding this pulse oximetry system the project enables future research and investigation into an emerging intersection of research between peripheral oxygen saturation and the partial pressure of carbon dioxide. Combining peripheral oxygen saturation and partial pressure of transcutaneous carbon dioxide into a single wearable device will facilitate simultaneous and pertinent measurements for both oxygenation and ventilation
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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