1,720,958 research outputs found
Feed characteristics dependent control parameter estimation by multivariate analysis in batch processes
No full textProcessing history dependent parameter estimation – an application to run-to-run batch process
No full text데이터 분석을 기반으로 한 다단회분공정에서의 Run-to-Run 모델 파라미터의 예측
No full text학위논문(석사) - 한국과학기술원 : 생명화학공학과, 2014.2, [ 55 p. ]In this study, a method is proposed that estimates the parameters of a quality prediction model for a batch process using previous batch data. The focus is on multistep batch processing, particularly the lithography process in a semiconductor manufacturing system . In this process, the appropriate model parameter input values exhibit a strong dependency on the prior processing history of the feed (hereafter called the control thread), e.g. the material conditions or equipment used in the previous processing steps. In such cases, it is common practice to use the data from the previous runs with an identical thread as the new batch run. However, as the process becomes more complicated in modern manufacturing systems, the variety of the control thread is increased and consequently the opportunity to locate recent data with an identical thread is reduced. In order to combat the shortage of usable data in an identical thread, it is important to enable the utilization of the data from the identical thread history data as well as that from runs of similar threads.
This study addresses this need in a practical manner. Using multivariate analyses of variance, the statistical similarities among the parameter values of the previous history data for different threads can be evaluated and substitutable sets of threads can be identified. The results from the statistical analyses can increase the amount and recency of the data used in the input parameter calculation. Furthermore, some specific rules for searching through the available previous history data are proposed that consider both the thread similarity and time-immediacy. Moreover, two different estimation methods and their results are compared. The proposed methodology is tested using simulated data and real manufacturing industrial data; the results demonstrate the practical viability and significant potential of the proposed method.한국과학기술원 : 생명화학공학과
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
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