1,720,972 research outputs found
Test di permutazione esatti in disegni fattoriali a misure ripetute bilanciati e non bilanciati
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Getting around in electric vehicles
No full textThe article has presented the electric tilting three-wheel vehicle (ET3WV) developed at the University of Padova, Italy, for urban mobility. It is characterized by an innovative connection between the tilting front module and the nontilting rear module, and by advanced solutions for the electric propulsion system. The design of the mechanical layout, of the traction drives, of the battery, and of the control circuitry of the vehicle were described, and its characteristics and driving performance were reported. Besides excellent performance in terms of acceleration and range, superior lateral stability and good maneuverability were achieved. Further work is mainly addressed to enhance the electric propulsion systems by providing the traction drives with torque control and flux-weakening features, with the latter being helpful for increasing the cruising speed out of the urban area
Permutation Testing for Isotonic Inference on Association Studies in Genetics
No full textIsotonic inference concerns situations in which a set of parameters is assumed, a priori, to satisfy certain order restrictions. In the most common case, where populations are arranged in ordered groups, the parameter of interest is assumed to change monotonically with the ordering of the groups. It is then reasonable to take account of the order restrictions in making inferences about the group parameters, such as point or interval estimations or significance tests. Isotonic inference represents a statistical tool of great value in many areas of applied research, especially within the fields of genetic epidemiology and molecular genetics. The purpose of this book is to illustrate a new statistical approach to test allelic association and genotype-specific effects in the genetic study of a disease. We deal with population-based association studies via permutation testing and some likelihood-based tests, but comparisons with other methods will also be performed, analysing advantages and disadvantages of each one, particularly with regard to power properties with small sample sizes. We will focus on case-control analyses to study allelic association between marker, disease-gene and environmental factors. Permutation tests, in particular, will be extended to multivariate and more complex studies where we deal with several genes and several alleles together
Test di permutazione multidimensionali in problemi di inferenza isotonica: un'applicazione alla genetica
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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
Electric tilting 3-wheel vehicle for a sustainable urban mobility
No full textThe paper presents the design and the development of an electric tilting three-wheel vehicle. It shows the possibilities offered by the integration of novel mechanical and electrical technologies in the arrangement of a vehicle for a sustainable urban mobility. The vehicle retains the performance of a light internal-combustion vehicle with two or four wheels (acceleration, maximum speed, range) while exhibiting zero road emissions and superior maneuverability and stabilit
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
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