1,720,967 research outputs found
Séminaire de recherche du CHSE
No full textResponsable du séminaire : Anouk Barberousse Prochaine séance :lundi 20 février de 11h30 à 12h30 à l'Université de Lille 1, Bât. P5bis, salle s.172 (1er étage) Exposé de Sandro Caparrini : "Les vecteurs en mécanique: 1750-1830". Les trois prochaines séances auront lieu : - le 26 mars 11h30 : Yannick Fonteneau "Travail, fatigue et force vive chez Daniel Bernoulli (1738-1753)" - le 12 avril 11h30 : Anouk Barberousse : "Données empiriques et simulations numériques" - le 14 mai 11h30 : Rossana T..
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
Remarks on J. L. Lagrange’s Méchanique analitique (1788)
Full text linkI offer here a number of disjointed remarks, or a collection of footnotes, to selected aspects of Lagrange‘ Méchanique analitique. They aim to explore a number of paths in the history of mathematics and mathematical physics at the end of the 18th century. These notes are, of necessity, quite technical; to understand the role of the Méchanique analitique in the development of mathematics and mathematical physics, we need to go through the text line by line and equation by equation
Il valore della fisica. Enrico Persico nella cultura italiana del Novecento, a cura di Vincenzo Barone e Giovanni Battimelli, Torino, Accademia delle Scienze (Quaderni, n. 37), 2020, pp. 214.
Full text linkThe Origins of Clifford Truesdell's Program for Rewriting the History of Early Modern Mechanics
No full textThe American mathematical physicist Clifford Ambrose Truesdell III (1919-2000) is remembered for having been both one of the founders of modern continuum mechanics and the greatest historian of mechanics in the twentieth century. These two activities cannot be separated. Truesdell began to be interested in the history of mechanics while looking for the origin of the fundamental theorems of continuum mechanics, and his historical work helped him to understand the methodology and aims of mathematical physics.
A careful examination of Truesdell's historical works shows that they form a vast research program in the history of the exact sciences, and in particular in the history of classical mechanics. This program has influenced generations of historians. To understand its breadth and purpose, it is necessary to reconstruct the early biography of Truesdell, to trace the beginnings of his interest in the history of mechanics and to describe the origins of his great histories of eighteenth-century mechanics, the Rational fluid Mechanics, 1687–1765 (1954) and the Rational mechanics of elastic or flexible bodies, 1638–1788 (1960)
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
Dieter Suisky. <i>Euler as Physicist</i>. xxiv + 338 pp., illus., tables, bibl., index. New York: Springer, 2009. $69.95 (cloth).
No full textWhen did torques and angular velocities become vectors? A historical comedy of errors.
Full text linkWho discovered the vector properties of moments of forces and angular velocities? Among the many scientists who did, there were some of the greatest mathematical physicists at the turn of the 18th and 19th centuries, like Euler, Lagrange, Laplace, Poinsot, Poisson and Cauchy. Surprisingly, due to scientific rivalries, differences in views and poor communications, it took around three quarters of a century, from 1759 to 1834, to figure out that moments of forces and angular velocities are best represented by directed line segments. The present article relates a cautionary tale about the meanders, the detours and the dead ends of the history of science
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