8,143 research outputs found
Order-disorder, Polytypes and Twinning in the Crystal Structure of vurroite
No full textVurroite, ideally Pb20Sn2(Bi,As)22S54Cl6, is a complex mineral type, where the two minor chemical components, Sn and Cl, act as essential constituents together with Pb, Bi, As and S 1, 2. X-ray single crystal data on vurroite strongly indicate an orthorhombic Fcentred symmetry 1, 3. In this study the crystal structure of vurroite is interpreted as an OD structure belonging to the category III of OD structures composed of equivalent layers 4. The application of the OD procedures allowed the derivation of the OD-groupoid family (λ and σ operations), as well as the MDO (Maximum Degree of Order) structures. The layer symmetry (λ) is A(2)mm, the interlayer symmetry (σ) consists of a glide plane n1/2,1/2 and two-fold screw axes parallel to 010 and 001 with the translation components 1⁄4 b and 1⁄4 c, respectively. For this OD family two MDO polytypes exists. The former has monoclinic symmetry, C12/c1, whereas the latter is monoclinic, P12/c1. The OD treatment of the crystal structure of vurroite allowed to prove that the true symmetry of this mineral is monoclinic and that the apparent orthorhombic symmetry observed for the X-ray pattern of the measured crystal is due to a twinning phenomenon. Prof. S. Merlino is gratefully acknowledged for his contribution on the OD interpretation of the structure of vurroite. 1 Pinto D., PhD thesis, University of Bari, 2004, 165. 2 Garavelli A.,Mozgova N.N., Orlandi P., Bonaccorsi E., Pinto D., Borodaev Y., Canadian Mineralogist, 2005, in press. 3 Pinto D., Balić-Žunić T., Bonaccorsi E., Makovicky E., 26th Nordic Geological Winter Meeting, Uppsala, Sweden,2004, 106-107, abstract. 4 Dornberger-Schiff K., Abh. Dtsch. Akad. Wiss. Berlin. Kl. Chem. Geol. Biol., 1964, 3, 1-107
Retracts of violence in the poetry of Claudia Roquette-Pinto
No full textRESUMO: O presente artigo objetiva salientar aspectos da violência social e seus reflexos dentro da poética de Cláudia Roquette-Pinto, em específico em seu poema “Sítio”. Será abordado o modo com o qual a autora trabalha suas criações, e que resulta na classificação de suas obras como referência no âmbito da poesia contemporânea brasileira. _________________________________________________________________________ ABSTRACTThe present article aims to emphasize aspects of social violence and its effects in the poetry of Cláudia Roquette-Pinto, in special into her poem “Sítio”. It will be discussed the way that the author works her creations, which results in the classification of her artworks as a reference within contends about Brazilian contemporary poetry
Mineralogy, crystal chemistry and structures of sulfosalts from Vulcano (Aeolian islands, Italy): Ag-free lillianite, Cl-bearing galenobismutite, kirkiite and the new mineral vurroite
No full textUnraveling the white-clothed Diestostemma Amyot & Serville: a taxonomic revision of the American sharpshooters of the D. bituberculatum complex (Hemiptera: Cicadellidae)
No full textPinto, Ângelo Parise, Mejdalani, Gabriel, Takiya, Daniela Maeda (2017): Unraveling the white-clothed Diestostemma Amyot & Serville: a taxonomic revision of the American sharpshooters of the D. bituberculatum complex (Hemiptera: Cicadellidae). Zootaxa 4281 (1): 135-164, DOI: https://doi.org/10.11646/zootaxa.4281.1.1
Avaliação individual do desempenho da Administração Pública no GEADAP
No full textTese de mestrado, Engenharia Informática (Sistemas de Informação), Universidade de Lisboa, Faculdade de Ciências, 2009Este documento descreve o estágio da aluna Ana Daniela Coimbra Pinto na empresa Unisys, que corresponde ao segundo ano do Mestrado em Engenharia Informática da Faculdade de Ciências da Universidade de Lisboa. O estágio consiste no desenvolvimento de funcionalidades de um Sistema de Informação a ser utilizado na Administração Pública para a sua avaliação de desempenho de acordo com a legislação em vigor. O sistema foi desenvolvido por uma equipa da Unisys na qual a autora se integrou, através de casos de uso fornecidos pelo Instituto de Informática (instituição onde decorria o desenvolvimento) recorrendo a tecnologias como o .NET e SQL Server. O resultado deste desenvolvimento é uma aplicação Web disponível a qualquer pessoa que possua uma ligação à internet e as devidas credenciais para aceder ao sistema. Ao longo do documento é dado mais ênfase ao desenvolvimento do componente “Avaliação Individual de trabalhadores e dirigentes” porque muitas das suas funcionalidades foram desenvolvidas pela autora.This document describes Ana Daniela Coimbra Pinto’s traineeship for Unisys, which corresponds to the second year of the science Faculty of Universidade de Lisboa’s Master Degree in Computer Science. The traineeship consisted in the development of functionalities for an Information System for the Public Administration to evaluate its own performance according to the legislation. The system was developed by a Unisys team in which the author was incorporated, through use cases provided by the Instituto de Informática (institution where the development occurred) using technologies like .NET and SQL Server. The result of this development is a Web application available to any person that has an internet connection and the appropriate credentials to access the system. Throughout the document is given more emphasis to the development of the component “Individual evaluation of workers and leaders” because many of its functionalities were developed by the author
Avaliação individual do desempenho da Administração Pública no GEADAP
No full textTese de mestrado, Engenharia Informática (Sistemas de Informação), Universidade de Lisboa, Faculdade de Ciências, 2009Este documento descreve o estágio da aluna Ana Daniela Coimbra Pinto na empresa Unisys, que corresponde ao segundo ano do Mestrado em Engenharia Informática da Faculdade de Ciências da Universidade de Lisboa. O estágio consiste no desenvolvimento de funcionalidades de um Sistema de Informação a ser utilizado na Administração Pública para a sua avaliação de desempenho de acordo com a legislação em vigor. O sistema foi desenvolvido por uma equipa da Unisys na qual a autora se integrou, através de casos de uso fornecidos pelo Instituto de Informática (instituição onde decorria o desenvolvimento) recorrendo a tecnologias como o .NET e SQL Server. O resultado deste desenvolvimento é uma aplicação Web disponível a qualquer pessoa que possua uma ligação à internet e as devidas credenciais para aceder ao sistema. Ao longo do documento é dado mais ênfase ao desenvolvimento do componente “Avaliação Individual de trabalhadores e dirigentes” porque muitas das suas funcionalidades foram desenvolvidas pela autora.This document describes Ana Daniela Coimbra Pinto’s traineeship for Unisys, which corresponds to the second year of the science Faculty of Universidade de Lisboa’s Master Degree in Computer Science. The traineeship consisted in the development of functionalities for an Information System for the Public Administration to evaluate its own performance according to the legislation. The system was developed by a Unisys team in which the author was incorporated, through use cases provided by the Instituto de Informática (institution where the development occurred) using technologies like .NET and SQL Server. The result of this development is a Web application available to any person that has an internet connection and the appropriate credentials to access the system. Throughout the document is given more emphasis to the development of the component “Individual evaluation of workers and leaders” because many of its functionalities were developed by the author
Avaliação individual do desempenho da Administração Pública no GEADAP
No full textTese de mestrado, Engenharia Informática (Sistemas de Informação), Universidade de Lisboa, Faculdade de Ciências, 2009Este documento descreve o estágio da aluna Ana Daniela Coimbra Pinto na empresa Unisys, que corresponde ao segundo ano do Mestrado em Engenharia Informática da Faculdade de Ciências da Universidade de Lisboa. O estágio consiste no desenvolvimento de funcionalidades de um Sistema de Informação a ser utilizado na Administração Pública para a sua avaliação de desempenho de acordo com a legislação em vigor. O sistema foi desenvolvido por uma equipa da Unisys na qual a autora se integrou, através de casos de uso fornecidos pelo Instituto de Informática (instituição onde decorria o desenvolvimento) recorrendo a tecnologias como o .NET e SQL Server. O resultado deste desenvolvimento é uma aplicação Web disponível a qualquer pessoa que possua uma ligação à internet e as devidas credenciais para aceder ao sistema. Ao longo do documento é dado mais ênfase ao desenvolvimento do componente “Avaliação Individual de trabalhadores e dirigentes” porque muitas das suas funcionalidades foram desenvolvidas pela autora.This document describes Ana Daniela Coimbra Pinto’s traineeship for Unisys, which corresponds to the second year of the science Faculty of Universidade de Lisboa’s Master Degree in Computer Science. The traineeship consisted in the development of functionalities for an Information System for the Public Administration to evaluate its own performance according to the legislation. The system was developed by a Unisys team in which the author was incorporated, through use cases provided by the Instituto de Informática (institution where the development occurred) using technologies like .NET and SQL Server. The result of this development is a Web application available to any person that has an internet connection and the appropriate credentials to access the system. Throughout the document is given more emphasis to the development of the component “Individual evaluation of workers and leaders” because many of its functionalities were developed by the author
Identidade e alteridade na Peregrinação de Fernão Mendes Pinto
No full textMestrado em Estudos PortuguesesO presente trabalho pretende apresentar uma análise da evolução
antropológica de Fernão Mendes Pinto aquando do seu contacto com a cultura
Oriental. É também nosso objectivo comprovar que a definição que o autor
tenta fazer do “Outro” oriental lhe vai permitir redescobrir a sua identidade.
O encontro de uma cultura nova permitiu ao homem de Quinhentos
iniciar o processo multicultural, e por conseguinte encetar o diálogo
intercultural. Na análise da Peregrinação tentaremos reflectir de que forma
Fernão Mendes Pinto foi influenciado por esse processo ao descrever o
“Outro” com o qual se encontrou, e em tantos aspectos tão diferente de si.
ABSTRACT: The present work intends to present an analysis of the anthropological
evolution of Fernão Mendes Pinto related to his contact with the oriental
culture. It is also our purpose to prove that through the definition that the author
tries to do of the “Other” he begins to rediscover his own identity.
The encounter with a new culture allowed the men of the 16h century
to begin the multicultural process, and consequently the intercultural dialogue.
In our analysis of the Peregrinação we will try to reflect about the way that
Fernão Mendes Pinto was influenced by the process of describing the “Other”,
with whom he contacted, and in so many ways so different from him
Valorisation of Water Potabilization Sludges as Precursors for Alkali-Activated Binders: Characterization and Feasibility Study
No full textWater potabilization sludges (WPS) are a heterogeneous waste generated from the coagulation–flocculation process of drinking water production, whose composition is highly dependent on the geological context of reservoirs, the composition and volume of treated water, and the types of coagulants used. For this reason, any feasible approach for reusing and valorising of such waste cannot be disregarded from the detailed investigation of its chemical and physical characteristics and they have to be evaluated at a local scale. In this study, WPS samples from two plants serving the Apulian territory (Southern Italy) were subjected for the first time to a detailed characterization with a view to evaluating their recovery and reuse at a local scale as a raw material for producing alkali activated binders. WPS samples were investigated by X-ray fluorescence (XRF), X-ray powder diffraction (XRPD) including phase quantification by the combined Rietveld and reference intensity ratio (RIR) methods, thermogravimetric and differential thermal analysis (TG-DTA), Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX). Samples showed aluminium–silicate compositions with up to 37 wt% of Al2O3 and up to 28 wt% of SiO2. Small amounts of CaO were also found (6.8 and 4 wt%, respectively). The mineralogical investigation indicates the presence of illite and kaolinite as clayey crystalline phases (up to 18 wt% and 4 wt%, respectively), in addition to quartz (up to 4 wt%) and calcite (up to 6wt%) and a large amorphous fraction (63 wt% and 76 wt%, respectively). WPS were subjected to heating from 400 °C to 900 °C and mechanical treatment by high energy vibro-milling in order to determine the best pre-treatment condition in view of their use as solid precursors to prepare alkali-activated binders. Alkali activation (8M NaOH solution; room temperature curing) was attempted on untreated WPS, on 700 °C heated and on 10-minute high-energy milled samples, which were considered the most suitable based on the preliminary characterization. Investigations of alkali-activated binders confirmed the geopolymerisation reaction occurrence. Variations in gel features and compositions depended on the amount of reactive SiO2, Al2O3 and CaO available in the precursors. WPS heated at 700 °C led to the most dense and homogeneous microstructures, due to a greater availability of reactive phases. The results of this preliminary study demonstrate the technical feasibility of preparing alternative binders from the investigated Apulian WPS, paving the way for a local reuse of these waste products, leading to economic and environmental benefits
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