1,720,985 research outputs found
The Window Effect on the Prediction of Acoustic Fields Using Planar Acoustic Holography ; Minimization of Bias Error
No full textSound image constructed by line array sweeping method
Full text linkThere are various methods which can be used to visualize acoustic field of interest. Acoustic holograph is one of them. Comparing with other methods; for example, acoustic intensity mapping, acoustic holograph requires complicated, laborious, and costly measurement set-up. Therefore, there have been many researches which mainly convey the idea of which reduces or simplifies the measurement configuration into practically achievable one. In fact, STSF(Spatial Transformation of Sound Fields) essentially achieved this bjective. It uses a reference microphone and line array system. The array scans the sound field of interest step by step. This method is very powerful for measuring sound field which comes from stationary sound sources. Other than stationary sound field, such as non-stationary sound field but stationary in space, this method cannot be used. This paper introduces the way in which one can construct necessary hologram by using single line array. This method does not have limitation on the type of sound field. The theoretical formulation starts with introducing appropriate coordinate system which essentially uses three coordinate system; inertia, hologram, and microphone coordinate. The relations between these coordinates have been theoretically found. Various examples which include noise from running car, motorcycle, Zing; one of Korean gong, show the usefulness of the method
Repassivation Kinetics of Stainless Steels and Its Applications to Evaluation of Stress Corrosion Resistance and Alloy Design
No full textEffects of EDTA on the Electronic Properties of Passive Film Formed on Fe-20Cr in pH 8.5 Buffer Solution
No full textA Study on the Electronic Properties of Passive Film Formed on Fe-20Cr by Photoelectrochemical and Mott-Schottky Analysis
No full textAnalysis of Repassivation Kinetics of Ferritic Stainless Steels Based on the Place Exchange Model
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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
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