1,720,954 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
Turboşaft motor rölanti altı performans modellemesi
No full textSub-idle performance estimation of gas turbine engines is challenging due to the lack of high-quality component performance rig data. Engine manufacturers heavily relied on engine testing to investigate this region of operation. However, the definition of safe and optimal starting, restarting, and shut-down procedures can be made more practically with the help of a numerical sub-idle engine model. Although it is one of the most popular topics in the gas turbine area through the 2020s, no robust and systematic method is available in the literature for estimating sub-idle characteristics in multi-stage turbomachinery without relying on starting or windmilling test data. For this purpose, this thesis aims to reach a specific method and guideline for sub-idle expansion of a specific performance model (above-idle model) of a gas turbine engine. Engine sub-idle behavior can be predicted correctly by using the suggested procedure provided in this thesis. Verification of the suggested method is accomplished with the aid of a demo turboshaft engine in addition to starting results available in the literature.Gaz türbinli motorların rölanti altı performans tahmini, o bölgeye ait yüksek kalitede komponent performans verilerinin bulunmaması nedeniyle zor ve karmaşık bir konudur. Motor firmaları bu çalışma bölgesini incelemek için motor testlerine büyük ölçüde güvenmektedir. Güvenli ve optimum motor başlatma, motor yeniden başlatma ve motor kapatma durumlarının incelenmesi ve değerlendirilmesi, bir rölanti altı model yardımıyla daha pratik ve detaylı olarak gerçekleştirilebilir. 2020’li yıllara kadar gaz türbinleri alanında en popüler konulardan biri olmasına rağmen, çok kademeli turbo makinelerde herhangi bir motor yel değirmeni veya başlatma testi verisi olmadan rölanti altı çalışma karakterlerini tahmin etmek için literatürde güvenilir ve sistematik bir yöntem mevcut değildir. Bu bağlamda, tezin amacı bir gaz türbinli motorun rölanti üstü performans modelinin rölanti altına genişletilmesi ve bu yöntemle başlatma karakterinin tahmin edilebilmesi için bir yöntem geliştirmektir. Motorun rölanti altı davranışı tezin içerisinde yer alan harita genişletme prosedürü kullanılarak doğru bir şekilde tahmin edilebilir. Önerilen metodun doğrulamaları bir deneme turboşaft motoru ve literatürde mevcut olan başlatma test verileri yardımı ile gerçekleştirilmiştir.Ph.D. - Doctoral Progra
Turboşaft motorları için çevrim tasarım yazılımı geliştirilmesi.
No full textIn this thesis, a computer software for the cycle design of a turboshaft engine is developed. Firstly, a numerical air model was implemented and the model of the turboshaft to be used in the simulation was selected. The first requirement for the software is the capability of performing design point calculations and parametric studies. This feature, which is the initial part of an aircraft engine design, was integrated into the software. At this point, to have a better estimation of the component performances, basic efficiency estimation modules of compressor, combustor and turbines were developed and embedded into the code. After setting the design point of the engine, the software can give insight to the designer about operating at different points from the design point in the operating envelope of the aircraft. In order to accomplish the off-design performance estimations, the map scaling technique was used with the reference maps and matching of the components of the designed turboshaft was programmed with the Newton-Raphson iteration technique. In addition to the off-design performance estimations, the dynamic behavior (transient) estimation module of the software was developed. After all, a GUI (Graphical User Interface) was constructed for the use of each parts of the software in a “user-friendly” environment. The results of the code were compared with the engine performance data and the commercially available program “GasTurb11” in order to confirm the reliability of the software to perform preliminary engine design studies.M.S. - Master of Scienc
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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