1,720,966 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
Solvent influence on non-adiabatic interfacial electron transfer at conductive oxide electrolyte interfaces
Get PDFThe kinetics for interfacial electron transfer (ET) from a transparent conductive oxide (tin-doped indium oxide, ITO, Sn:In2O3) to molecular acceptors 4-[N,N-di(p-tolyl)amino]benzylphosphonic acid, TPA, and [RuII(bpy)2(4,4′-(PO3H2)2-bpy)]2+, RuP, positioned at variable distances within and beyond the electric double layer (EDL), were quantified in benzonitrile and methanol by nanosecond absorption spectroscopy as a function of the thermodynamic driving force, -ΔG°. Relevant ET parameters such as the rate constant, ket, reorganization energy, λ, and electronic coupling, Hab, were extracted from the kinetic data. Overall, ket increased as the distance between the molecular acceptor and the conductor decreased. For redox active molecules within the Helmholtz planes of the EDL, ket was nearly independent of -ΔG°, consistent with a negligibly small λ value. Rips-Jortner analysis revealed a non-adiabatic electron transfer mechanism consistent with Hab < 1 cm-1. The data indicate that the barrier for electron transfer is greatly diminished at the conductor-electrolyte interface.Fil: Aramburu Troselj, Bruno Martín. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Bangle, Rachel E.. University of North Carolina; Estados UnidosFil: Meyer, Gerald J.. University of North Carolina; Estados Unido
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
INTERFACIAL ELECTRON TRANSFER FOR SOLAR ENERGY CONVERSION: KINETIC AND MECHANISTIC INSIGHTS
Get PDFThe ubiquity of sunlight makes solar energy a promising alternative to carbon fuels, but wide-spread applications will require solar energy storage. To this end, solar energy and earth-abundant chemical feedstocks might be converted to liquid fuels in devices termed dye-sensitized photoelectrosynthesis cells (DSPECs). This Dissertation seeks to build fundamental understandings of interfacial electron transfer (IET) reactions between molecular sensitizers and metal oxide (MOx) nanocrystals important to DSPEC optimization. Chapter 1 outlines the chemical processes involved in DSPEC operation and the semi-classical theories which describe IET. Chapters 2 develops a novel method to sensitize MOx materials through diazonium electrografting. Diazonium-substituting Ru-bis-terpyridine sensitizers were successfully anchored to MOx surfaces through alkaline-stable, covalent bonds. Though diazonium-electrografted photoelectrodes produced small photocurrents relative to traditional anchoring groups in acidic conditions, they achieved sustained photocurrents at pH 12. In Chapter 3, the IET mechanisms of dye-sensitized MOx core|shell materials generated through atomic layer deposition are discussed. Structural and kinetic analysis of Ru-polypyridyl-sensitized ZrO2|TiO2 and SnO2|TiO2 materials demonstrated that the rate and mechanism of IET could be controlled by the shell thickness and morphology. Chapters 4-7 explore IET reactions in dye-sensitized transparent conducting oxides (TCOs), which exhibit metallic behavior. In Chapter 4, a TCO displayed both anodic and cathodic capabilities, as the direction of photo-initiated IET with Ru-polypyridyl or Ru-bipyrazine sensitizers was controlled by applied potentials and sensitizer excited state localization. In Chapters 5-7, Marcus-Gerischer kinetic analysis allowed quantification of IET reorganization energies (). This showed that for a Ru water oxidation catalyst, proton-coupled IET exhibited a 0.4 eV larger than did electron transfer alone (Chapter 5). Marcus-Gerischer analysis also showed to increase systematically with IET distance for Ru-polypyridal and tri-aryl amine complexes located at defined positions within the TCO electric double layer (EDL) by layered ionic bridges (Chapter 6). In fact, within the outer-Helmholtz plane, IET was nearly activationless ( ≈ 0.1 eV). This was attributed to electric fields in the EDL which drastically decreased the dielectric response of the polar solvents. Further, insensitivity to solvent dynamics between water, acetonitrile, methanol, and benzonitrile indicated IET was non-adiabatic, even at the smallest distances (Chapter 7).Doctor of Philosoph
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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