1,723,756 research outputs found
Christopher E. Goscha : Indochine ou Vietnam - CR de lecture par Xiao Han
No full textCR de lecture de Xiao Han : Goscha, Christopher E., Indochine ou Vietnam ?, Paris, Vendémiaire, 2015, 188 p. Cet ouvrage est le fruit d'une étude de Christopher E. Goscha, historien américain spécialiste de la péninsule indochinoise sur la période de colonisation et décolonisation. Publié chez Vendémiaire en 2015, il retrace l'histoire connectée du Viêt Nam des années 1880 aux années 1950. Il questionne le concept d' « Indochine française » avec des approches historiques inédites : les intera..
Christopher E. Goscha : Indochine ou Vietnam - CR de lecture par Xiao Han
No full textCR de lecture de Xiao Han : Goscha, Christopher E., Indochine ou Vietnam ?, Paris, Vendémiaire, 2015, 188 p. Cet ouvrage est le fruit d'une étude de Christopher E. Goscha, historien américain spécialiste de la péninsule indochinoise sur la période de colonisation et décolonisation. Publié chez Vendémiaire en 2015, il retrace l'histoire connectée du Viêt Nam des années 1880 aux années 1950. Il questionne le concept d' « Indochine française » avec des approches historiques inédites : les intera..
Study of S-wave Microseisms Generated by Storms in the Southeast Australia and North Atlantic
No full textThe beamforming and seismic data for the paper by Xiao et a
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
Extended convolution model for computing the far-field directivity of an amplitude-modulated parametric loudspeaker
No full textThe convolution model of the parametric loudspeaker describes the far-field directivity of the difference-frequency wave by the product directivity of two ultrasonic primary frequencies convolved with Westervelt's directivity. This can be extended to the case when the primary wave is amplitude-modulated thus resulting in the harmonic distortion of the self-demodulated wave. This paper proposes the extended convolution model with Westervelt's directivity and Berktay's directivity respectively. The angle-dependent harmonic distortion of the parametric loudspeaker is thereafter investigated, which is a topic not often mentioned in previous literature but is of significance in practice. The measurement, numerical simulation and model results are compared for the case when the double sideband modulation is adopted and the frequency response of the ultrasonic emitter is a known factor. The comparison validates that the extended convolution model provides accurate predictions that are consistent with the measurement results and the extended convolution model is a simpler way to compute the far-field directivity of an amplitude-modulated parametric loudspeaker as compared to the numerical simulation
A scalable hybrid analog-digital architecture for multi-channel feedforward active noise control
No full textThis paper proposes a hybrid analog-digital architecture, aimed at reducing hardware resource consumption and improving the scalability of a multi-channel feedforward active noise control system to accommodate a large number of error microphones. This hybrid architecture employs a partial-update filtered-x least mean squares algorithm that is lightweight and suitable for real-time execution, as it updates the control filters in each iteration using only two selected error signals. The selection of these two error signals is achieved through a dedicated analog circuit comprising analog comparators and multiplexers. Thus, the hybrid architecture requires only two analog-to-digital converters for error signals, regardless of the number of error microphones. Experiments were conducted on two active noise control casings, demonstrating that, with a specific computational capacity, the proposed hybrid architecture can accommodate significantly longer control filters, resulting in higher steady-state noise reduction. Moreover, additional error microphones were introduced to demonstrate the scalability. The hybrid architecture simplifies the implementation of the multi-channel feedforward active noise control system when additional error microphones are needed for more evenly distributed residual noise levels or a larger zone of quiet
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
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