1,721,071 research outputs found
A fault tolerant multistage interconnection network and its fault diagnosis: the ring-banyan network
No full textIn this paper, we describe the fault tolerant schemes for the multistage interconnection network (MIN) and its fault diagnosis. first, we present a fault tolerant MIN and an adaptive self-routing scheme for the network. It can provide more multiple paths than the previous networks between an input/output pair of a network by adding extra links between switching elements in the same stage and modifying the self-routing scheme of the regular MIN. The presented routing scheme is as simple as that of the regular MIN, which is based on the topological relationships among the switching elements (SEs) that render a packet to the same destination with the regular self-routing. We also show the SEs in a stage are arranged regularly each stage of the banyan network is constructed with sequences of a cyclic group of SEs, which are discovered in this paper. We present an algebraic proof to show the correctness of the routing scheme. We also present an analysis to provide quantitative comparisons with the replicated networks. Second, we consider the fault models in the fault detection and the location schemes. We present a new fault diagnosis scheme for the network
Automatic partial parsing rule acquisition using decision tree induction
No full textPartial parsing techniques try to recover syntactic information efficiently and reliably by sacrificing completeness and depth of analysis. One of the difficulties of partial parsing is finding a means to extract the grammar involved automatically. In this paper, we present a method for automatically extracting partial parsing rules from a tree-annotated corpus using decision tree induction. We define the partial parsing rules as those that can decide the structure of a substring in an input sentence deterministically. This decision can be considered as a classification; as such, for a substring in an input sentence, a proper structure is chosen among the structures occurred in the corpus. For the classification, we use decision tree induction, and induce partial parsing rules from the decision tree. The acquired grammar is similar to a phrase structure grammar, with contextual and lexical information, but it allows building structures of depth one or more. Our experiments showed that the proposed partial parser using the automatically extracted rules is not only accurate and efficient, but also achieves reasonable coverage for Korean
Hydrogen peroxide modulates K+ ion currents in cultured Aplysia sensory neurons
No full textHydrogen peroxide (H2O2) causes oxidative stress and is considered a mediator of cell death in various organisms. Our previous studies showed that prolonged (> 6 h) treatment of Aplysia sensory neurons with I mM H2O2 produced hyperpolarization of the resting membrane potential, followed by apoptotic morphological changes. In this study, we examined the effect of H2O2 on the membrane conductance of Aplysia sensory neurons. Hyperpolarization was induced by 10 mM H2O2 within I h, and this was attributed to increased membrane conductance. In addition, treatment with 10 mM H2O2 for 3 min produced immediate depolarization, which was due to decreased membrane conductance. The H2O2-induced hyperpolarization and depolarization were completely blocked by dithiothreitol, a disulfide-reducing agent. The later increase of membrane conductance induced by H2O2 was completely blocked by 100 MM TEA, a K+ channel blocker, suggesting that H2O2-induced hyperpolarization is due to the activation of K+ conductance. However, the inhibition of K+ efflux by TEA did not protect against H2O2-induced cell death in cultured Aplysia sensory neurons, which indicates that the signal pathway leading to H2O2-induced cell death is more complicated than expected. (C) 2003 Elsevier Science B.V. All rights reserved
Stress Analysis and Evaluation of Cracks Developed on the Coatings for Welded Joints of Water Ballast Tanks
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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
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