1,721,102 research outputs found
Free-form, form finding and anisotropic grid shell
Get PDFp. 966-876The new geometrical developments open new perspectives for free-form design, making it possible to escape from planar triangular or quadrilateral discretizations. Recent advances in theory algorithms allow for the discretization of any surface using only single curvature panels thus allowing the realisation of smooth double curvature glazed envelops of any form.
Grid shell structures usually present a nearly in plane uniform behaviour, but previous
realisations have shown that grid shells can be designed also according to an anisotropic inplane arrangement. The control of principal direction and the fine tuning of the stiffness of the different structural elements (arcs, cables etc.) is a tool for adjusting the form-finding thus controlling the resulting geometry. Moreover, the form-finding can also be performed without researching a constant stress (self weight); in this case an even wider range of forms become possible.
These new geometrical and structural approaches have been coupled together and tested in re-designing, as a case study, the glazed roof of the Neumunster Abbey in Luxembourg. Such approach allowed for the conception of an efficient structure supporting a smooth double curvature glass skin, made out of only single curvature panels, perfectly coherent with the perimeter of the courtyard i.e. matching all the edges without any gaps.Baldassini, N.; Raynaud, J. (2010). Free-form, form finding and anisotropic grid shell. Editorial Universitat Politècnica de València. https://riunet.upv.es/handle/10251/696
Formation d'embryons dans la culture in vitro de tissus de Conium maculatum L
No full textNétien Georges, Raynaud J. Formation d'embryons dans la culture in vitro de tissus de Conium maculatum L. In: Bulletin mensuel de la Société linnéenne de Lyon, 41ᵉ année, n°3, mars 1972. pp. 49-51
Coriaria myrtifolia L. Nouvelles stations dans le département de la Drôme
No full textNétien Georges, Raynaud J. Coriaria myrtifolia L. Nouvelles stations dans le département de la Drôme. In: Bulletin mensuel de la Société linnéenne de Lyon, 43ᵉ année, n°10, décembre 1974. p. 397
Alison F., Fabia J. et Raynaud J. — Enquête sur les enfants et les adolescents atteints d'infirmité motrice
No full textG A. Alison F., Fabia J. et Raynaud J. — Enquête sur les enfants et les adolescents atteints d'infirmité motrice. In: Population, 17ᵉ année, n°1, 1962. p. 176
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
Evolution de la décantation dans le passage de l’écoulement laminaire à l’écoulement turbulent et phénomènes de charriage dans les dessableurs à espace cloisonné
No full textConsidérant un tube incliné unique pouvant faire partie d'un dessableur à espace cloisonné, les auteurs présentent les résultats d'un certain nombre d'essais. Ils montrent comment se fait la décantation en laminaire et de combien elle s'écarte en turbulent lisse du taux prévu par le calcul en laminaire. Ils soulignent l'importance croissante prise par le charriage sur l'effet global de séparation quand la vitesse augmente, effet nuisible ou non suivant le sens de l'écoulement. Enfin, ils montrent comment la manière de réaliser l'organe de recueil du dépôt a une influence énorme sur le fonctionnement global d'un dessableur à tubes inclinés.Gariel Paul, Raynaud J.-P. Evolution de la décantation dans le passage de l’écoulement laminaire à l’écoulement turbulent et phénomènes de charriage dans les dessableurs à espace cloisonné. In: Transport hydraulique et décantation des matériaux solides. Compte rendu des deuxièmes journées de l'hydraulique, Grenoble, 25-29 juin 1952. Tome 1, 1953
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
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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