1,720,995 research outputs found
Synthesis of CeO2 nano-aggregates of complex morphology
No full textCerium oxide with spheric, flowerlike and needle-like shapes has been synthesized by a simple microwave assisted method using diethylene glycole in mild conditions. The effect of reaction temperature on the crystal structure and morphology were discussed. The structural evolutions and morphological characteristics of the nanostructures were investigated using X-ray diffractometery, scanning and trasmission electron microscopy, Fourier transform infrared spectroscopy, TGA/DSC and BET analysis. By changing experimental conditions pure CeO2 fluoritic phase or cerium formate with complex morphology were formed. High porosity CeO2 nanostructures, retaining the end-reaction morphology, was readily obtained by calcination of cerium precursor. This simple and economic soft chemical method leads to nanostructured-micrometric aggregates of cerium oxide with high specific surface area suitable for catalytic applications
A stochastic approach for the study of balance maintenance in "de-novo" Parkinson patients
No full textGoing 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
Analysis and reliability of posturographic parameters in Parkinson Patients at an early stage
No full textANALISI POSTURALE ED ELETTROMIOGRAFICA DI SOGGETTI PARKINSONIANI AFFETTI DA SINDROME DI PISA
No full textPATTERNS DI ATTIVAZIONE MUSCOLARE DURANTE IL FUNCTIONAL REACH TEST IN SOGGETTI DIABETICI
No full textCARATTERIZZAZIONE CINEMATICA, DINAMICA ED ELETTROMIOGRAFICA DEL FUNCTIONAL REACH IN SOGGETTI PARKINSONIANI AFFETTI DA PISA SYNDROME
No full textVariations 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
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