1,720,974 research outputs found
Assessing perceived food chemical risk by means of an educationaleì project analysed with permutation tests
No full textNon Parametric combinatio
Parametric vs. Nonparametric Approach for Interval Estimators of Multivariate Ranking Parameters
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
Numerical simulation of windshield defogging process
No full textA suite of routines for the prediction of environment moist condensation and evaporation on solid surfaces is presented. The physical problem requires the solution of the airflow field along a (cold) solid surface, the evaluation of the unsteady conduction through the solid itself, and the development of a suitable model for the heat and mass transfer through the thin water layer on the fogged surface. The routines for the unsteady simulation of the water layer development Eire designed as a purely interfacial procedure, minimizing the exchange of information with both the flow and the conductive solver. This allows the coupling with different solvers. Here, the model is used in connection with a commercial computational fluid dynamics solver, in order to predict the defogging process of a car windshield. The water layer is modelled as a collection of closely packed tiny droplets, leaving a portion of dry area among them. The effect of the contact angle is taken into account, and physical assumptions allow the local ratio of the wet surface to the dry surface to be defined for both the fogging and the defogging process
Nonparametric Multivariate Ranking Methods for Global Performance Indexes
No full textThe proper definition of a global performance index is a challenging topic, especially in the field of New Product Development and Education. Very often in this context, the research aim is focused on evaluating the performances of treatments (products, services, etc.) from a multivariate point of view, that is, in connection with more than one aspect and/or under several conditions. Therefore, the main goal of statistical data analysis consists in the calculation of a proper index to obtain a global performance evaluation of the treatments under investigation. The purpose of this work is to present an innovative nonparametric method for ranking of treatments, with reference to the analysis of variance layout, using a suitable global performance index, and to critically compare two challenging indexes that can be used in complex situations whereas parametric procedures can not be reliably employed. The goal of this paper is to find which procedure is more reliable. In particular, the procedures are tested by varying experimental conditions such as the number of variable and the distributions of random errors
A novel intensity-based sensor platform for refractive index sensing
No full textIn the present investigation a new intensity-based sensor platform for refractive index sensing is presented. It is based on a special holder, a slab waveguide and two Plastic optical fibers (POFs). In particular, we present a comparison between two different configurations: the slab waveguide with and without a buffer layer. Advantages of this new approach are the possibility of sensing with a removable chip, the easy production of an engineered platform and the use of a special holder, which is also suitable for thermo-stabilized flow cells implementation
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
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