1,721,064 research outputs found
A combined transport-injection model for hot-electron and hot-hole injection in the gate oxide of MOS structures
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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
Comprehensive analysis of random telegraph noise instability and its scaling in deca-nanometer Flash memories
No full textThis paper presents a comprehensive investigation of
random telegraph noise (RTN) in deca–nanometer Flash memories, considering both the NOR and the NAND architecture. The statistical distribution of the threshold voltage instability is analyzed in detail, evidencing that the slope of its exponential tails is the critical parameter determining the scaling trend for RTN. By means of 3-D TCAD simulations, the slope is shown to be the result of cell geometry, atomistic substrate doping, and random placement of traps over the cell active area. Finally, the slope dependence on cell geometry (width, length, and oxide thickness), doping, and bias conditions is summarized in a powerful formula that is able to predict the RTN instabilities in deca–nanometer Flash memorie
A study of hot-hole injection during programming drain disturb in Flash memories
No full textProgram disturbs in NOR-type Flash arrays significantly
degrade the tunnel oxide by hot-hole injection (HHI) induced
by band-to-band tunneling at the drain overlap. This paper
provides a comprehensive experimental and modeling analysis
of HHI in Flash memories under program-disturb conditions.
Carrier-separation measurements on arrays of Flash memories
with contacted floating-gate (FG) allows for a direct investigation
of hole-initiated impact ionization and HHI. A Monte Carlo (MC)
model is used to simulate carrier multiplication and injection into
the FG. After validating the MC model against experimental data
for both secondary electron generation and HHI, the model is used
to provide further insight into the hole-injection mechanism
Injection Efficiency of CHISEL Gate Currents in Short MOS Devices: Physical Mechanisms, Device Implications and Sensitivity to Technological Parameters",
No full textThis paper analyzes MOSFET gate currents in the so-called channel initiated secondary electron injection regime (CHISEL). A Monte Carlo model of the phenomenon is validated and then extensively used to explore CHISEL scaling laws. Results indicate that, compared to conventional channel hot electron injection (CHE), CHISEL exhibits a weaker dependence on channel length and a larger sensitivity to short channel effects. These results are confirmed experimentally and exhaustively explained with the help of simulations; furthermore, some of their possible detrimental consequences on the programming efficiency of CHISEL based flash cells are analyzed. Finally, the impact of channel doping, oxide thickness, and junction depth on CHISEL efficiency has been explored, and guidelines to maintain high injection efficiency in short devices are derived
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