1,720,958 research outputs found
IMPACT OF SUBSTANCE (DRUGS) MISUSE ON MATERNAL HEALTH CASE STUDY BANADIR HOSPITAL MOGADISHU-SOMALI
No full textBackground: Pregnant women who abuse substances (alcohol, tobacco, and prescription and illicit drugs) are at the intersection of public health and criminal justice intervention
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Electret-Nanopore Ionic Flux Generator
No full textTowards the development of in-vivo autonomous technology, this paper proposes and investigates an electret-nanopore based ionic flux generator (IFG). The Poisson-Nernst-Planck equations were used to develop a one-dimensional analytical model under circulatory electrolytic conditions characterizing enhanced power density as electret charge saturation or pore length increased due to greater counterion flux. An approximate Electret-Nanopore IFG power density of 11.3 (W/m2) was calculated for a 500 nm pore length, 10 nm pore radius and 80% electret charge saturation system.
Machine-Learning Screening of Inorganic Compounds for Defect Spin Properties
No full textAn ensemble regression algorithm predicting refractive index, band gap and magnetic susceptibility utilizing elemental composition based physical descriptors is developed to screen for inorganic compounds with color defect spin properties at low computational cost. Mean absolute error (MAE) values of 0.46 for refractive index, 0.65 eV for bandgap utilizing gradient boost regression and 2.95e-3 cm3/mol for magnetic susceptibility with random forest regression were obtained via 70:30 train-test splits. When screened for threshold values of bandgap >2 eV, refractive index > 2 and magnetic susceptibility < 10e-5 cm3/mol, notable binary compounds with defect spin properties include GaN and SiC among 348 compounds demonstrating model utility
Variations on the Author
No full text“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
No full textWe 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
No full textWe 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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