1,720,957 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Perkiraan Dosis Pasien Dari Fotoneutron Linear Accelerator Menggunakan Detektor TLD-600H Dan TLD-100H
No full textPasangan TLD-600H dan TLD-100H digunakan sebagai dosimeter pemantauan dosis neutron untuk memperkirakan distirbusi fotoneutron yang dihasilkan oleh linac 15MV pada tubuh pasien terapi kanker. TLD disinari radiasi dengan sumber gamma standar 137Cs untuk mengetahui keseragaman dan kesamaan respon dari TLD-600H dan TLD-100H dan dibuat kurva kalibrasi neutron menggunakan sumber neutron standar 252Cf. Pasangan TLD disebar pada 14 titik yang dianggap sebagai posisi organ kritis pada fantom antropomorfik berbahan polietilen LDPE kemudian disinari menggunakan foton linac pada isocenter tubuh dengan dosis 2 Gy dan 3 Gy. Hasil penilitian didapatkan nilai dosis neutron tertinggi terdapat pada daerah isocenter tubuh sekitar 53 mSv untuk dosis foton 2 Gy dan terdapat pada daerah tulang belakang sekitar 83 mSv untuk dosis foton 3 Gy. Nilai dosis neutron yang didapatkan berkurang seiring dengan semakin jauhnya jarak dari isocenter tubuh
Titania-based photoelectrochemical H2 production from water involving economic sacrificial agents
Get PDFH2 is considered as a crucial factor for future energy prosperity due to its high energy density and the carbon-free feature it offers. A sustainable route towards H2 is therefore paramount, and it necessitates avoiding fossil-based sources and/or costly technology. This opportunity has paved the way for H2 production via semiconductor-based photoelectrochemical (PEC) water splitting, which exploits charge carriers extracted from the semiconductors that are exposed to photons, driving redox generation of O2 and H2.
Titania-based films, notwithstanding their excellent chemical stability which make them favoured photoanode materials in most PEC systems, still suffer from several limitations, including restricted surface area, high recombination rate of photo-carriers, and visible-light-inactivity. By identifying scope for improvements based on literature survey, this PhD project revolved around syntheses, characterisations, and modifications of titania-based films as photoanode materials for PEC H₂ production involving economic sacrificial agents. Titania materials were deposited on F:SnO2 via a spray pyrolysis method. PEC results revealed photocurrents of anatase TiO2 control films in the realm of ca. 40 μA at 0.8 V vs HgO|Hg with PEC efficiency of ca. 0.40% (120 W/m2 white light intensity, exposing 0.3 cm2 geometric area).
Morphological modifications were successfully accomplished via a one-step polyethylene glycol (PEG)-templating technique, leading to generation of nano-sized features and improved roughness while maintaining the original superstructure. PEC efficiency of up to 1.23% was revealed by PEG-modified films, attributed to improved surface area and betterment of carrier transport facilitated by the morphological structure. A series of organic compounds were introduced as anodic sacrificial agents, leading to better carrier transport and current-doubling effects, the significance of which were more noticeable in the use of rough-surface photoanodes. Key factors related to the functionalities of sacrificial agents in PEC H2 production were stipulated. Suppression of carrier recombination was also pursued by incorporating highly conductive graphene into the film network, which successfully increased PEC efficiency by 70% as compared to unmodified TiO2. Efforts on modifying TiO2 band gap were made with the purpose of extending the usable portion of light spectrum, which included doping with impurities (anions and cations) and synthesis of bismuth titanates. While obtaining satisfactory results in this context remains a challenge, difficulties associated with the undesired outcome and possible adjustments for future studies are suggested.Open Acces
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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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