1,720,998 research outputs found
Recent developments in the use of structural actuators for decentralised active control
No full textWith an array of ideal, dual, collocated actuators and sensors, decentralized feedback controllers can not only be unconditionally stable, but their performance in reducing vibration and, hence, radiated sound, can approach that of a centralized LQG controller [W. P. Engles et al., JASA 119, 1487–1495 (2005)]. They also have a modular architecture that scales well, even for very large structures. This paper discusses some of the problems that arise in practice when proof-mass or piezoelectric transducers are used instead of ideal force or moment-pair actuators in such decentralized controllers. Proof-mass actuators are attractive when generating significant forces, but their natural frequency must be well below the first structural resonance frequency for stable operation. Even when this is achieved, impulsive forces due to the actuators hitting their end-stops have recently been shown to potentially be an additional source of instability. Piezoceramic actuators can give significant control in thinner structures, but as well as controlling out-of-plane vibration, they also create in-plane motion in the structure that can couple into closely located strain sensors causing instability in feedback controllers. Novel arrangements of such transducers will be described in which the effect of in-plane coupling is minimized, thus significantly improving their performance
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
The History of Ethnic Chinese Studies in Indonesia : Transition from the Soeharto Regime to the Reformasi Era(<Special Issue>Beyond Southeast Asia : New Perspectives on Overseas Chinese Studies through Historiographical Reflection)
No full textこの論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。Three dominant changes have occurred in the study of the ethnic Chinese in Indonesia after the fall ofSoeharto. First, the study of Indonesian Chinese was freed from the threat of SARA censorship (Suku, Agama, Ras, dan Antar Golongan, or ethnic, religious, racial, and class relations), which was removedafter Soeharto. Second, ethnic Chinese studies have accelerated. Many seminars and discussions are nowheld and many books about the ethnic Chinese have been published in Indonesia. Some aim to abolishinequalities and discriminatory measures and claim justice. Although changes have been made in the law, anti-Chinese hostility still exists in society. Other studies analyze the discourses of Dutch colonialism andIndonesian nationalism and reconsider the Chinese role in nation building, so as to rewrite Indonesian history, which has largely ignored the ethnic Chinese. Third, foreign researchers are shifting their attentionfrom political issues, such as assimilation, national integration, and political identity to subjects reflectingthe changing role of the ethnic Chinese in East and Southeast Asia in an era of globalization and rapid economicgrowth.In this paper I will focus on such changes by reviewing studies done during the New Order regimeand the subsequent period of Reformasi
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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