1,720,956 research outputs found
Processing-Induced Electrically Active Defects in Black Silicon Nanowire Devices
No full textSilicon
nanowires (Si NWs) are widely investigated nowadays for
implementation in advanced energy conversion and storage devices,
as well as many other possible applications. Black silicon (BSi)-NWs
are dry etched NWs that merge the advantages related to low-dimensionality
with the special industrial appeal connected to deep reactive ion
etching (RIE). In fact, RIE is a well established technique in microelectronics
manufacturing. However, RIE processing could affect the electrical
properties of BSi-NWs by introducing deep states into their forbidden
gap. This work applies deep level transient spectroscopy (DLTS) to
identify electrically active deep levels and the associated defects
in dry etched Si NW arrays. Besides, the successful fitting of DLTS
spectra of BSi-NWs-based Schottky barrier diodes is an experimental
confirmation that the same theoretical framework of dynamic electronic
behavior of deep levels applies in bulk as well as in low dimensional
structures like NWs, when quantum confinement conditions do not occur.
This has been validated for deep levels associated with simple pointlike
defects as well as for deep levels associated with defects with richer
structures, whose dynamic electronic behavior implies a more complex
picture
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
Supported Pt Nanoclusters on Single-Layer MoS<sub>2</sub> for the Detection of Cortisol: From Atomistic Scale to Device Modeling
Full text linkThe
development of nonenzymatic sensors is a challenge which requires,
on the one hand, careful design of the sensing materials with respect
to the chosen analyte, and on the other hand, suitable device architectures.
In this work, we propose single-layer molybdenum disulfide (MoS2) decorated with subnanometer Pt clusters as the sensing platform
for the detection of cortisol. The aim is to assess the suitability
of such a sensing platform for the development of wearable and portable
cortisol sensors. For this study, we performed multiscale computer
simulations at the materials level up to device scale. First, ab initio
simulations within the framework of density functional theory (DFT)
allowed us to gain insights into the interaction, at the atomic level,
between the analyte (cortisol) and the sensing platform (MoS2/Pt). Then, by carrying out technology computer-aided design (TCAD)
simulations, we were able to consider a device architecture and investigate
its performance as cortisol sensor. Following our multiscale simulation
strategy, we were able to assess the proposed field-effect transistor
(FET) sensor, whose channel is made of Pt-decorated MoS2. The sensing mechanism relies on the chemiresistive response of
the device to the adsorption of cortisol on the channel, which leads
to a sizable charge transfer from the analyte to the substrate and,
consequently, to the measurable shift in the gate voltage threshold
of the FET. Our findings suggest that both the choice of the sensing
materials and the proposed FET architecture are suitable for detecting
cortisol by non-enzymatic means. In the best case scenario, we predict
theoretical gate voltage shifts between 76 and 780 mV with respect
to the cluster concentration and between 27 and 780 mV when varying
the cluster occupancy by cortisol. We may expect our results to provide
the necessary basis to develop highly sensitive nonenzymatic cortisol
sensors based on 2D materials decorated with Pt nanoclusters
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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