186,312 research outputs found
Lettre de M. Yves Pirat, Dijon, le 15 juillet 1972.
No full textPirat Yves. Lettre de M. Yves Pirat, Dijon, le 15 juillet 1972.. In: Revue Internationale d'Onomastique, 25e année N°3, juillet 1973. p. 225
PIRAT. Programme Interdisciplinaire de Recherche de Biogéodynamique Intertropicale Périatlantique
No full textTardy Yves. PIRAT. Programme Interdisciplinaire de Recherche de Biogéodynamique Intertropicale Périatlantique. Strasbourg : Institut de Géologie – Université Louis-Pasteur, 1994. 116 p. (Sciences Géologiques. Mémoire, 96
Colette Yver, Marie-Pauline de Jésus-Christ. Mademoiselle Jairicot, 1937 ; Yvonne Pirat, Pauline Jaricot, 1937
No full textConstantin C. Colette Yver, Marie-Pauline de Jésus-Christ. Mademoiselle Jairicot, 1937 ; Yvonne Pirat, Pauline Jaricot, 1937. In: Revue des Sciences Religieuses, tome 19, fascicule 3, 1939. p. 416
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Desenvolvimento de um sistema óptico por triangulação cônica para inspeção do perfil interno de dutos
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Metrologia Científica e Industrial.Garantir a integridade da rede de dutos de transporte e distribuição é um fator de extrema importância na indústria do petróleo e gás (P&G). Para tal, são utilizadas sofisticadas ferramentas robotizadas de inspeção in-line (durante operação) conhecidas como pigs. No Brasil existem esforços por parte da Petrobras para o desenvolvimento de pigs com tecnologia nacional, tendo em vista que existem mais de 30 mil quilômetros de dutos espalhados somente em território brasileiro. Novas formas de inspeção vêm sendo desenvolvidas no mundo, sendo a óptica uma delas, a qual possui vantagens como custo reduzido, elevada velocidade, alta resolução e pequena incerteza de medição. Este trabalho apresenta, desenvolve e avalia uma nova concepção de sensor óptico apropriado para medir o perfil interno de seções de dutos. O sistema se baseia na triangulação através de espelhos cônicos (que nesse trabalho nomeia-se de triangulação cônica), o que permite a medição absoluta de todo o perímetro da seção (360°) sem partes móveis/giratórias e a partir da análise de uma única imagem. A qual é então processada pelo software, que fornece o resultado de medição de forma gráfica, representando de maneira clara a secção da superfície interna do duto medida. No instrumento construído e testado em laboratório, algumas limitações inerentes ao atual estágio de protótipo ficaram evidentes nos experimentos. Apesar disso, os resultados atingidos são altamente promissores e satisfatórios para a aplicação almejada
PiRat: an autonomous framework for studying social behaviour in rats and robots
No full textThe use of robots, as a social stimulus, provides several advantages over using another animal. In particular, for rat-robot studies, robots can produce social behaviour that is reproducible across trials. In the current work, we outline a framework for rat-robot interaction studies, that consists of a novel rat-sized robot (PiRat), models of robotic behavior, and a position tracking system for both robot and rat. We present the design of the framework, including constraints on autonomy, latency, and control. We pilot tested our framework by individually running the robot rat with eight different rats, first through a habituation stage, and then with PiRat performing two different types of behaviour - avoiding and frequently approaching. We evaluate the performance of the framework on latency and autonomy, and on the ability to influence the behaviour of individual rats. We find that the framework performs well on its constraints, engages some of the rats (according to the number of meetings), and features a control scheme that produces reproducible behaviour in rats. These features represent a first demonstration of a closed-loop rat-robot framework
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
No full textWe 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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