1,720,972 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
Improving technology for manufacturing casting case of truck clutch release cylinder
Full text linkThe object of research: Manufacturing technology of body castings for trucks using the example of a clutch release cylinder body made of gray cast iron with flake graphite EN-GJL-200.
Investigated problem: Finding ways to reduce the weight and size characteristics of cast parts.
The main scientific results: A mathematical model has been developed that has made it possible to determine the optimal compositions of alloying Cr/Ni – Cu/Ti complexes that ensure an increase in the grade of cast iron by increasing the tensile strength at elevated carbon contents. This makes it possible in the future to reduce the thickness of the walls of the castings, achieving a reduction in their weight and size characteristics
The area of practical use of the results of the study: Automotive industry in terms of technology for manufacturing cast parts for trucks
Innovative technological product: Improved technology for manufacturing the clutch release cylinder body due to optimization of melt technology and out-of-furnace processing allows for targeted selection of melt processing modes, ensuring an increase in the strength characteristics of cast iron for cast body parts, thereby moving from the EN-GJL-200 cast iron grade to the EN grade -GJL-250 and EN-GJL-300.
The scope of the innovative technological product: Foundries of engineering enterprises, in particular those producing trucks, in which iron castings are produce
Experimental and industrial method of synthesis of optimal control of the temperature region of cupola melting
Full text linkThe object of research is the temperature regime of melting in a cupola. The synthesis of optimal control of such an object is associated with the presence of a problem consisting in the complexity of its mathematical description and the absence of procedures that allow one to obtain optimal control laws. These problems are due to the presence of links with a pure delay, non-additive random drift, and difficulties in controlling the process parameters, in particular, accurately determining the temperature profile along the horizons and the periphery of the working space of the cupola.
The proposed conceptual solution for the synthesis of optimal temperature control allows the use of two levels of control: the level controller solves the problem of maintaining the constant height of the idle charge, and the problem of increasing the temperature of cast iron is solved by controlling the air supply to the tuyere box.
It is shown that the problem of regulating the upper level of an idle charge can be solved by reducing the model of the regulation process to a typical form, followed by the use of the Pontryagin maximum principle.
A procedure for the synthesis of optimal air flow control is proposed, which makes it possible to obtain the temperature regime control law on the basis of experimental industrial studies preceding the synthesis process. This takes into account the time delay between the impact on the object and its reaction, which makes it possible to predict the temperature value one step acharge, equal to the time interval during which the lower surface of the fuel charge reaches the upper surface of the level of the idle charge.
A procedure for temperature profile control based on the use of D-optimal plans for selecting sensor installation points is proposed. Due to this, it becomes possible to determine the temperature profile of the cupola according to its horizons and the periphery of the working space of the cupola with maximum accuracy.
The proposed synthesis method can be used in iron foundries equipped with cupolas, as it is a tool for studying a real production process, taking into account its specific conditions. This will allow developing or improving control systems for cupola melting, implementing different control modes: manual, automated or automati
National Analytical Scientific Base of Ukraine as a resource of quality scientific publications for Web of Science and Scopus: conceptual solution and information and mathematical support
Full text linkThe object of research: scientific quality of periodical scientific publications in terms of national and international requirements.
Investigated problem: imperfect evaluation of the quality of scientific publications of Ukraine, which does not allow at the state level to adequately represent the scientific heritage of the country in the form of high-quality scientific periodicals. Instead, such an acquisition may be of interest to Web of Science and Scopus, which is interested in quality scientific publications in order to realize its commercial interest in expanding the circle of subscribers. Because of this, each Ukrainian publication must independently prove its ability to index in Web of Science and Scopus, and these resources do not have the opportunity to obtain a potentially large cluster of high-quality scientific publications with a theoretical horizon of more than 2,000 publications. Accordingly, the large-scale presentation of scientific periodicals of Ukraine in Web of Science and Scopus will make it possible to increase the ratings of Ukrainian science, which is represented by the universities of the Ministry of Education and Science of Ukraine and the structures of the National Academy of Sciences of Ukraine.
The main scientific results: the proposed general structure of the National Analytical Scientific Base of Ukraine (NASB), which takes into account international quality requirements and scientometric indices, and is supplemented with analytical quality evaluation tools. The proposed informational and mathematical support includes four components of the Integral Quality index (QI) vector, which takes into account the relative indices of the quality of a scientific publication, its demand among authors, citations and demand among readers. This allows comprehensive, objective and transparent evaluation of the quality of scientific publications on four quantitative scales, which minimizes possible manipulations and increases trust in scientific publications on the part of users.
The area of practical use of the results of the study: a system for evaluating the quality of scientific publications, scientific activity of individual scientists, collectives, institutions of Ukraine, as well as, in a potential perspective, scientometric databases Web of Science and Scopus as integrated sub-databases.
Innovative technological product: the concept and informational and mathematical support of a database of scientific periodicals, which has the potential for practical implementation under the conditions of investment in development and implementation.
The scope of the innovative technological product: NASB as a fully functional independent scientific resource that can be used in the system of evaluating scientific activity in Ukraine, or as part of other global resources of scientific periodicals, in particular Web of Science and Scopus
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