1,720,956 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
Optimization of the production of hazelnut oil
Get PDFCilj ovog istraživanja bio je ispitati utjecaj različitih parametara ekstrakcije ulja iz lješnjaka procesom hladnog prešanja, nakon čega je provedena ekstrakcija zaostalog ulja unutar pogače pomoću superkritičnog CO2. U eksperimentima prešanja korištena je metoda odzivnih površina (RSM) pomoću koje je ispitan utjecaj temperature zagrijavanja glave preše (70, 85, 100 °C), frekvencije elektromotora (20, 30, 40 Hz) i veličine otvora (8, 10, 12 mm) na kvalitetu i iskorištenje ulja. Optimalni parametri za dobivanje najvećeg iskorištenja i najbolje kvalitete ulja su sljedeći: temperatura zagrijavanja glave preše 70 °C, frekvencija elektromotora 30 Hz i otvor glave pužne preše 9 mm. Pogača dobivena pri optimalnim uvjetima prešanja podvrgnuta je ekstrakciji na novokonstruiranom uređaju za superkritičnu ekstrakciju. Ovim postupkom količina zaostalog ulja u pogači gotovo je u potpunosti ekstrahirana sa superkritičnim CO2.The aim of this research was to evaluate the effects of different process parameters of hazelnut oil extraction with screw pressing followed by extraction with supercritical CO2. In pressing experiments, the response surface methodology (RSM) was conducted in order to study the effects of temperature head presses (70, 85, 100 °C), frequency (20, 30, 40 Hz) and nozzle size (8, 10, 12 mm) on oil yield and quality. The optimal condition for obtaining the highest yield and the best oil quality within the experimental range of the variables studied was at temperature 70 °C, frequency of 30 Hz and using nozzle size of ID 9 mm. The cake resulting from optimal pressing condition was used in further research in a newly designed and built supercritical fluid extraction system. With this procedure, the residual oil in the pressed cake was almost totally extracted with supercritical CO2
Metabolic effect of ω-3 and ω-6 fatty acids
No full textMasti u prehrani predstavljaju bogat izvor energije bitne za održavanje fizioloških funkcija i
tjelesne aktivnosti, a osiguravaju oko 40 % ukupne energije organizma. Prehranom u organizam
unosimo masti koje su mješavina triju vrsta masnih kiselina: zasićenih, mononezasićenih i
polinezasićenih. Osim njihove energetske vrijednosti, masne kiseline imaju značajan učinak po
ljudsko zdravlje, i to prije svega polinezasićene ω-3 i ω-6 masne kiseline. Prehrana bogata ω-6
masnim kiselinama (linolna) pridonosi snižavanju ukupnog i LDL kolesterola u krvi. ω-3 masne kiseline
imaju zaštitnu ulogu u prevenciji i liječenju bolesti srca i krvnih žila, povišenog krvnog tlaka, nekih
upalnih i imunih poremećaja, poput reumatidnog artritisa i psorijaze, a pridonosi i smanjenju
triglicerida u krvi. Kako su ti pozitivni učinci prije svega odraz metaboličkih promjena u organizmu,
odnosno stanicama, cilj je ovog rada bio dati pregled metaboličkog utjecaja ω-3 i ω-6 masnih kiselina.Dietary fats are a rich source of energy essential for maintaining physiological functions and physical activity, and provides about 40 % of the total energy in the diet. Dietary fats are mixture of three types of fatty acids: saturated, monounsaturated and polyunsaturated. Except their energy value, fatty acids, primarly polyunsaturated ω-3 and ω-6 fatty acids, have a significant impact on human health. A diet rich with ω-6 fatty acids (linoleic acid) contributes to lower total and LDL cholesterol in the blood. It is well known, that ω-3 fatty acids plays essential role in the prevention of cardiovascular diseases, high blood pressure, certain inflammatory and immune disorders such as rheumatoid arthritis and psoriasis, as well as reduction of triglyceride levels. As these positive effects primarly reflect metabolic changes in the body or cells, the aim of this work was to review the metabolic effects of ω-3 and ω-6 fatty acids
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
- …
