1,721,007 research outputs found
The dimensions of music improvisation
No full textThe paper reports research employing a quantitative approach to investigating the specific cognitive processes adopted and musical abilities required during musical improvisation. Two questionnaires were used: the Improvisation Processes Questionnaire and the Improvisation Abilities Questionnaire. Participants were 76 adult musicians, each of them with at least two-year’s improvisation experience. Factor analysis extracted five dimensions for the Improvisation Processes Questionnaire (anticipation, emotive communication, flow, feedback and use of repertoire) and two dimensions for the Improvisation Abilities Questionnaire (musical practice and basic skills). Data were subjected to ANOVA for each of the 5+2 factors, considering the influence of three concurrent variables (instrument played, being or not being skilled at several instruments and kind of preferred music for performances). Results revealed a significant interaction between instrument played and the dimension basic skills, and between being or not being skilled at several instruments and the dimension flow. Significant Pearson correlations were found between flow and anticipation, between flow and musical practice, between anticipation and basic skills, between repertoire and emotive communication, between repertoire and feedback, between musical practice and basic skills. The interactions between the factors and the importance of the dimensions are discussed considering also how an improviser can improve performance levels
Distributed hybrid sensors architectures for launch vehicle avionics and future space transportation systems
No full textDistributed architectures of hybrid sensors could greatly support the future launch vehicles navigation systems and avionics in the perspective of a significant increase of the space launches in the future years and decades. While the current architectures rely on high-TRL, costly, centralized sensors, similar performances could be reached by distributed networks of lower TRL, lower cost sensors. This paper introduces a concept for a hybrid network of sensors and will describe the prototypes and tests for several categories of implemented sensors
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
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
Vhf omnidirectional range (Vor) experimental positioning for stratospheric vehicles
Get PDFThe usage of aeronautical radio-frequency navigational aids can support the future stratospheric aviation as back-up positioning systems. Although GNSS has been extensively redundant in the last years of space operations, radio NavAids can still be supportive of navigation and tracking for novel mission profiles. As an example, in 2016, VHF Omnidirectional Range (VOR) has been proven to work well above its standard service volume limit on a stratospheric balloon flight with the STRATONAV experiment. While VOR provides the “radial” measurement, i.e., the angle between the Magnetic North and the line between the receiver and the transmitting ground station, the intersection of two or more radials at a time allows to perform ground track reconstruction for the vehicle to be tracked. This paper reports the results from the data re-processing from STRATONAV: the acquired radials have been intersected in order to achieve positioning. The radials interfacing method, the position calculation methodology, and the data acquisition strategies from STRATONAV are reported together with the data analysis results
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
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