1,721,143 research outputs found
Study of Punch-through Characteristics In Irradiated Mosfets
No full textThe DC and low frequency AC characteristics of the punch-through (PT) conduction have been examined in MOSFETs with different channel width/length ratios, fabricated on high resistivity Si substrates. The experimental results can be fitted by an analytical model deriving from a previous one developed for BARRITT devices. The modifications on the PT conduction induced by high dose neutron irradiation have been studied at various temperatures. The effects due to the radiation induced deep levels cannot be easily taken into account into the DC model, but can still be interpreted by using the AC model of the device
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
Degradation of Silicon Ac-coupled Microstrip Detectors Induced By Radiation
No full textResults are presented showing the radiation response of ac-coupled FOXFET biased microstrip detectors and related test patterns to be used in the microvertex detector of the CDF experiment at Fermi National Laboratory. Radiation tolerance of detectors to gamma and proton irradiation has been tested and the radiation induced variations of the dc electrical parameters have been analyzed. Long term post-irradiation behaviour of detector characteristics have been studied, and the relevant room temperature annealing phenomena have been discussed
Electrical characteristics of Metal-Resistive layer-Silicon (MRS) avalanche detectors
No full textThe main electrical characteristics at room temperature of Metal-Resistive layer-Silicon avalanche detectors are presented for devices with a Ti/SiC/p-Si structure. Hysteresis of the I-V characteristics and transients taking place during tests at fixed bias have been experimentally studied, in correlation also with the effect of ionizing radiation. The device time response has been tested by using a Sr-90 source
Array-like metal-resistance-semiconductor photodetectors: characterization and modelling.
No full textEds G. Baccarini and M. Rudan Editions Frontieres, France, 199
Metal-resistive Layer-silicon (mrs) Avalanche Detectors With Negative Feedback
No full textThe main electrical characteristics at room temperature of metal-resistive layer-semiconductor avalanche detectors are presented for devices with a Ti/SiC/p-Si structure. The device response has been tested by using a Sr-90 source. The consequences on the device behavior induced by substrate inhomogeneities have been modeled, and compared with those occurring in conventional Avalanche Photo Diodes (APD)
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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