1,721,321 research outputs found
Musik och politik : ett tolkningsproblem
No full textMagnus Eriksson borrar i sin artikel i frågan om huruvida musik kan vara politisk, och i så fall hur. En titel eller en sångtext kan ge riktning, men kan instrumental musik, själva den klingande dimensionen, i sig vara politiskt betydelseproducerande? Eriksson diskuterar frågor som dessa via historiska nedslag och ett antal exempel från olika musikgenrer, så som country, klassisk musik och techno
Musik och politik : ett tolkningsproblem
No full textMagnus Eriksson borrar i sin artikel i frågan om huruvida musik kan vara politisk, och i så fall hur. En titel eller en sångtext kan ge riktning, men kan instrumental musik, själva den klingande dimensionen, i sig vara politiskt betydelseproducerande? Eriksson diskuterar frågor som dessa via historiska nedslag och ett antal exempel från olika musikgenrer, så som country, klassisk musik och techno
Untersuchungen zum Fallverhalten würfelförmiger Einzelkörper in Wasser
No full textThe underwater fall of cubes (as reference bodies for sharp edged quarry rock material) of different sizes and densities has . been examined. The experimental study has been carried out by using a shaft (diameter: 5 m) filled with water. Due to rotary motion (Magnus' effect), the trajectories of such cubes deviate from vertical lines. The direction of such deviation cannot be predicted, because the axis of rotation changes irregularly during the fall. The cubes reach their settling velocities very fast. The observed settling velocities are in accordance with the values obtained from the general quadratic law for resistance. The drag coefficient Cw is 0,8 - independent of the size and density of the cube - referred to the maximum projection area. Since the effected projection area changes during a cube's fall, the instantaneous velocity of this object oscillates. The oscillation can sometimes be as large as 25 % of the calculated mean value
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
Frugal Methods for the Independent Set and Graph Coloring Problems.
No full textWe consider two classical hard graph problems: finding the maximum independent set of vertices, and coloring the vertices with fewest colors possible. We are interested in frugal algorithms for these problems, ones that use limited amount of computing capabilities. Such algorithms yield approximate, rather than exact, solutions, and are valued according to their performance guarantee, which is the maximum factor that approximate solutions can differ from optimal ones. We are primarily interested in two classes of frugal algorithms: polynomial-time, and on-line algorithms. We present several polynomial-time algorithms for obtaining large approximations in graphs containing large independent sets, and use them to improve the best performance guarantees known for both problems. We show how nearly all effective algorithms for these problems fall into yet another category of frugal algorithms, based on removing subgraphs, and obtain tight lower bounds on their performance. For on-line graph coloring, we give strong lower bounds for both deterministic and randomized algorithms, that hold even if the models are weakened in several ways, and improve the best performance guarantee known for randomized on-line coloring. Finally, we prove simple tight bounds on two interpretations of the on-line independent set problem and some of its variations.Technical report DCS-TR-28
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
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