1,721,344 research outputs found
Microelectronics Reliability - SPECIAL ISSUE 29th EUROPEAN SYMPOSIUM ON THE RELIABILITY OF ELECTRON DEVICES, FAILURE PHYSICS AND ANALYSIS, Aalborg, Denmark, 1–5 October 2018
No full textMicroelectronics Reliability - SPECIAL ISSUE 23rd EUROPEAN SYMPOSIUM ON THE RELIABILITY OF ELECTRON DEVICES, FAILURE PHYSICS AND ANALYSIS, Cagliari, Italy, 1–5 October 2012
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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
Two-dimensional numerical simulation of deep-level effects in 6H-SiC buried-gate JFETs
No full textIn this paper, deep-level effects are investigated in 6H-SiC, buried gate, n-channel JFETs, by means of measurements and simulations of the drain-current transients following a gate-source step, allowing the energetic and spatial localization of the traps to be inferred
Investigation of High-Electric-Field Degradation Effects in AlGaN/GaN HEMTs
No full textHigh-electric-field degradation phenomena are investigated in GaN-capped AlGaN-GaN HEMTs by comparing experimental data with numerical device simulations. 150-hour DC stresses were carried out under power-state and off-state conditions. Degradations effects characterizing both stress experiments were: a drop in the DC drain current, the amplification of gate-lag effects, and a decrease in the reverse gate leakage current. Numerical simulations indicate that the simultaneous generation of surface (and/or barrier) traps and of buffer traps can account for all of the above degradation modes. Experiments showed also that the power-state stress induced a drop in the transconductance at high gate-source voltages only, whereas the off-state stress led to a uniform transconductance drop over the entire gate-source-voltage range. This behavior can be reproduced by simulations provided that, under power-state stress, traps are assumed to accumulate over a wide region extending laterally from the gate edge towards the drain contact, whereas, under off-state stress, trap generation is supposed to take place in a narrower portion of the drain access region close to the gate edge and to be accompanied by a significant degradation of the channel transport parameters
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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