1,721,043 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
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
Calculation of molecular electronic structure by density functional theory
No full textOvaj rad daje pregled osnovnih postulata i način primjene teorije funkcionala gustoće (DFT) u određivanju elektronske strukture molekula. Za izračun se koristi CP2K, suvremeni kvantno-mehanički programski paket te je dan prikaz instalacije, korištenje i opisa najbitnijih naredbi u CP2K. Teorijski izračuni su pojašnjeni pomoću teorije molekularnih orbitala. Za osnovni primjer je uzeta molekula amonijaka, za koju su proveden izračun optimizacije molekulske strukture. Zatim je na njoj proveden izračun naboja na atomima dušika i vodika pomoću Mulliken populacijske analize i Hirshfeldovih načina određivanja naboja. To je rađeno za različite bazne setove i funkcionale energije izmjene i korelacije. Nacrtane su molekularne orbitale te je prikazan način njihovog formiranja. Dodatno je izračunati rendgenski emisijski spektar za molekulu SO42+ te je uspoređen s eksperimentalnim rezultatima. Na kraju je uzet malo složeniji primjer molekule dibenzil sulfida te su za nju izračunate koordinate atoma, naboj na njima te rendgenski spektar.This bachelor thesis provides an overview of the fundamental postulates and the application of density functional theory (DFT) in determining the electronic structure of molecules. The calculations were made using CP2K, a modern quantum – a mechanical software package, and its installation, usage, and key commands are presented. A molecular orbital theory is used to explain theoretical calculations. The ammonia molecule was taken as a basic example, for which the molecular structure optimization was calculated. Using Mulliken and Hirshfeld population analysis the partial charge calculation on the nitrogen and hydrogen atoms was performed. This was done for different basis sets and exchange – correlation energy functionals. Molecular orbitals were ploted and their formation process was demonstrated. In addition, the X-ray emission spectrum for the SO42+ molecule was calculated and compared with experimental results. Finally, a slightly more complex example of a dibenzyl sulfide molecule was taken, and the atomic coordinates, charges, and X-ray spectrum were calculated
Calculation of molecular electronic structure by density functional theory
No full textOvaj rad daje pregled osnovnih postulata i način primjene teorije funkcionala gustoće (DFT) u određivanju elektronske strukture molekula. Za izračun se koristi CP2K, suvremeni kvantno-mehanički programski paket te je dan prikaz instalacije, korištenje i opisa najbitnijih naredbi u CP2K. Teorijski izračuni su pojašnjeni pomoću teorije molekularnih orbitala. Za osnovni primjer je uzeta molekula amonijaka, za koju su proveden izračun optimizacije molekulske strukture. Zatim je na njoj proveden izračun naboja na atomima dušika i vodika pomoću Mulliken populacijske analize i Hirshfeldovih načina određivanja naboja. To je rađeno za različite bazne setove i funkcionale energije izmjene i korelacije. Nacrtane su molekularne orbitale te je prikazan način njihovog formiranja. Dodatno je izračunati rendgenski emisijski spektar za molekulu SO42+ te je uspoređen s eksperimentalnim rezultatima. Na kraju je uzet malo složeniji primjer molekule dibenzil sulfida te su za nju izračunate koordinate atoma, naboj na njima te rendgenski spektar.This bachelor thesis provides an overview of the fundamental postulates and the application of density functional theory (DFT) in determining the electronic structure of molecules. The calculations were made using CP2K, a modern quantum – a mechanical software package, and its installation, usage, and key commands are presented. A molecular orbital theory is used to explain theoretical calculations. The ammonia molecule was taken as a basic example, for which the molecular structure optimization was calculated. Using Mulliken and Hirshfeld population analysis the partial charge calculation on the nitrogen and hydrogen atoms was performed. This was done for different basis sets and exchange – correlation energy functionals. Molecular orbitals were ploted and their formation process was demonstrated. In addition, the X-ray emission spectrum for the SO42+ molecule was calculated and compared with experimental results. Finally, a slightly more complex example of a dibenzyl sulfide molecule was taken, and the atomic coordinates, charges, and X-ray spectrum were calculated
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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