1,720,970 research outputs found
Vehicles headlamps glare effect removal
No full textThe presented work is the result of the development, realization and verification of a new device, designed to reduce and remove the glare effects of the automotive vehicle headlamps over the other drivers. Through the successful realization of a prototype it is possible to directly verify the fundamental principles of the device, by measuring the quality and the strength of its effectiveness
Vehicles Headlamps Glare Effect Removal
No full textThe presented work is the result of the development, realization and verification of a new device, designed to reduce and remove the glare effects of the automotive vehicle headlamps over the other drivers. Through the successful realization of a prototype it is possible to directly verify the fundamental principles of the device, by measuring the quality and the strength of its effectiveness
A systematic investigation of the mechanochemical decomposition of Ag oxalate in rod drop experiments
No full textThe present work focuses on the chemical response of Ag oxalate powders to the collision of rods in controlled rod drop experiments performed by using suitably designed reactors. Powder layers of different thickness were submitted to the collision of cylindrical rods with selected radius, mass, and collision velocity. The experimental findings indicate that collisions are able to induce the partial decomposition of Ag oxalate into metallic Ag and gaseous carbon dioxide. The mass of Ag oxalate decomposed is proportional to the collision energy. Being the impact energy the same, the mass decomposed is inversely proportional to the surface area of the powder layer. In addition, it increases irregularly as the thickness of the powder layer increases. The results obtained suggest that rod drop experiments can be profitably used to promote and investigate mechanochemical transformations. © 2012 Elsevier B.V. All rights reserved
A systematic investigation of the mechanochemical decomposition of Ag oxalate in rod drop experiments
No full textThe present work focuses on the chemical response of Ag oxalate powders to the collision of rods in controlled
rod drop experiments performed by using suitably designed reactors. Powder layers of different
thickness were submitted to the collision of cylindrical rods with selected radius, mass, and collision
velocity. The experimental findings indicate that collisions are able to induce the partial decomposition
of Ag oxalate into metallic Ag and gaseous carbon dioxide. The mass of Ag oxalate decomposed is proportional
to the collision energy. Being the impact energy the same, the mass decomposed is inversely proportional
to the surface area of the powder layer. In addition, it increases irregularly as the thickness of
the powder layer increases. The results obtained suggest that rod drop experiments can be profitably
used to promote and investigate mechanochemical transformations
Formation of metastable solid solutions by mechanical alloying of immiscible Ag and Bi
No full textThis work investigates the effects of the Vickers micro-hardness of Ag powders on the alloying process undergone by Ag90Bi10 powder mixtures submitted to ball milling. The transformation kinetics has been studied by quantitative X-ray diffraction. The experimental findings indicate that Bi gradually dissolves into Ag, finally forming a crystalline solid solution in which thermodynamic solubility limits are largely exceeded. It is shown that the rate of Bi dissolution, and the solubility degree, decrease as the Vickers micro-hardness of Ag powders increase
Effects of postharvest treatments with hot water, soy lecithin, calcium chloride, or 1-Methylcyclopropene (1- MCP) and cold storage on internal browning development in ‘Camusina’ and ‘Precoce di Fiorano’ pears
No full text
Going 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
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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