1,720,960 research outputs found
Improving the Efficiency of Software-Based Fault Protection Mechanisms with HUSTLE
No full textTo achieve confidence in safety-critical systems, requires among others to meet high requirements on online testing of computer systems, as dictated by safety standards such as ISO26262, IEC61508, and CENELEC EN 5012X. Online testing can be performed through the periodic execution of online SW Test Libraries, which are widely used in safety-related applications as a valuable safety mechanism to protect against random HW faults. SW Test Libraries introduce a non-negligible overhead on system performance, exacerbated by the increasing complexity of HW devices. This contrasts with the efforts of researchers and system designers for developing efficient systems. Reducing this overhead is an important achievement. We propose here HUSTLE, a Hardware Unit for SW-Test Libraries Efficient execution, which can be integrated into the chip design with minimum modification to the CPU's design. HUSTLE contains an Internal Memory, where the library code is stored, and sends instructions to the CPU, bypassing the Memory Subsystem. To further improve efficiency, we also propose a scheduling mechanism that allows to exploit the idle time of the CPU's execution unit. To show the efficiency gain in supporting the test libraries execution, we ran some experiments, where a considerable reduction of the overall CPU load was observed. Finally, remarks regarding the limited impact on the area and power consumption are presented
HUSTLE: A Hardware Unit for Self-test-Libraries Efficient Execution
No full textOnline testing of computer systems is crucial in contexts such as the safety-critical domain, where the software is usually made of functional code, which is the code implementing the application-specific functionalities, and non-functional code, which implements auxiliary functionalities, e.g., test routines. By periodically running a test routine it is possible to satisfy the high dependability requirements mandated by regulators, and defined in safety standards such as ISO26262, IEC61508, and CENELEC EN 5012X. Self-Test Libraries (STLs) are a form of software-based self-test, widely used in safety-related applications. The main drawback of this safety mechanism is the overhead imposed on the execution of the functional code, and reducing this overhead is a well-known challenge in research. We propose here HUSTLE, a Hardware Unit for STL Efficient execution, which can be integrated into the chip design with no modification to the CPU’s internal logic. We also propose a scheduling mechanism that allows HUSTLE to efficiently execute self-tests, by exploiting the CPU’s idle time. This is achieved by storing test code in a separate memory and sending instructions to the CPU, bypassing the Instruction Cache, thus allowing to reduce the overall execution time and the cache interference of STL, while CPU utilization increases
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
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
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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