Uso del Análisis Digital de Imágenes (ADI) como herramienta para el estudio petrográfico en rocas metamórficas

Los retos en las actividades de innovación en docencia, se basan en la necesidad de proponer nuevos métodos y estrategias que permitan ampliar y armonizar toda clase de recursos que se tengan disponibles, para potencializar los resultados en el proceso de enseñanza - aprendizaje -- En el caso de la asignatura de rocas metamórficas, es muy común identificar dificultades en los estudiantes en el análisis petrográfico, identificación de minerales, patrones texturales, y relación con curvas de blastesis; por lo anterior se quiso implementar el tratamiento de análisis digital de imágenes (ADI), como una herramienta pedagógica que facilite el aprendizaje de los mismos

A multi-sectoral version of the Post-Keynesian growth model

Neste artigo, pretende-se desenvolver uma versão desagregada da abordagem pós-Keynesiana para o crescimento econômico, mostrando que de fato esse modelo pode ser tratado como um caso particular do modelo Pasinettiano de mudança estrutural e crescimento econômico. Utilizando-se o conceito de integração vertical, torna-se possível conduzir a análise iniciada por Kaldor (1956) e Robinson (1956, 1962), e seguido por Dutt (1984), Rowthorn (1982) e, posteriormente, Bhaduri e Marglin (1990) em um modelo multi-sectorial em que há aumentos da demanda e produtividade em ritmos diferentes em cada setor. Ao adotar essa abordagem, é possível mostrar que a dinâmica de mudança estrutural está condicionada não apenas aos padrões de demanda de evolução das preferências e da difusão do progresso tecnológico, mas também com as características distributivas da economia, que podem dar origem a diferentes regimes setoriais de crescimento econômico. Além disso, é possível determinar a taxa natural de lucro que faz com que a taxa de mark-up seja constante ao longo do tempo. _________________________________________________________________________________ ABSTRACT

SURI: Controlador MIDI por medio de un teclado de computador

El presente artículo narra las experiencias del desarrollo de Suri, un programa informático que permite enviar información MIDI a otros programas por medio del teclado del computador y combina las características lingüísticas de un editor de texto con elementos tecnológicos y musicales -- Del mismo modo, relata la forma en la que se conectó el desarrollo de este programa con la búsqueda de nuevas herramientas para la composición musical y describe sus diversas funciones y generalidades técnicas

From SeaDataNet II to SeadataCloud

The presentation highlight the present status and achievements of the SeaDataNet infrastructure and look forward to innovations and further developments that are proposed for the coming years.

Valoración de una Start-up de tecnología

Este documento expone la importancia del ejercicio de valoración como herramienta para la construcción de las proyecciones y la planeación financiera de una empresa en etapa temprana, al tiempo que prueba el método de flujos de caja con tasa de descuento ajustada al riesgo, como la metodología más recomendada por expertos, en la valoración de nuevas empresas (startups), y valida la marginalidad de la información contable y financiera entre los emprendedores -- Busca soportar en un único documento, las decisiones de inversión de financieros, prestamistas y emprendedores, en atención a la subjetividad con que muchos inversionistas valoran desde su percepción, el potencial de crecimiento, la generación de flujos futuros y/o el posicionamiento estratégico de las startup -- Como ya se mencionó, el método de Descuento de Flujos de Caja (DFC) será la metodología aplicada y analizada -- Entre otras ventajas, porque al estar basado en la generación de flujos a partir de los activos fijos, no se expone a percepciones del mercado ni a criterios no trasladables, en caso de una valoración por comparables -- El lector podrá constatar, y de acuerdo con la bibliografía consultada, que la metodología de DFC, no sólo es la más apropiada para la valoración de una startup, sino que dadas las circunstancias en cuanto a disponibilidad de la información, es obligatorio clasificarla, dentro de los métodos más sofisticados -- Finalmente, entre otras conclusiones, se hace énfasis en que el ejercicio de la valoración debe centrarse en identificar el potencial que tiene la empresa de convertirse en una entidad generadora de valor -- En tal sentido, el análisis se debe focalizar en el plan estratégico, que se espera desarrollar a corto, mediano y largo plazo, y en las acciones para alcanzar las metas planteadas -- No siempre la situación de la empresa ha de estar acorde con lo proyectado, se pueden presentar variaciones en el comportamiento financiero, adicionalmente, la demanda de capital líquido e inversiones en activos generan, en la mayoría de los casos, déficit en los flujos de caja producto de las dificultades de los emprendedores para garantizar dicha demanda de recursos

Saudosa Maloca, Maloca querida: um estudo morfológico da relação forma/usos do espaço em moradias autoconstruídas e construídas pelo poder público após um ano de ocupação

This study intends to enhance the existing knowledge concerning the patterns of the uses of space for low cost housing in Parnamirim, Rio Grande do Norte, Brazil, by way of comparative morphological studies in spatial arrangements and articulations regarding three distinct, however inter-related, sets of social housing: (1) a development comprising 21 self-built houses erected on public routes and illegal plots within a tract of land originally designed to be an industrial development: (2) architect-designed houses built by the public authority in order to accommodate the previous 21 (plus a few additions) families occupying the self-built dwellings, and (3) modifications performed by dwellers on a total of those 24 houses built by the public authority after an occupation period of one year. The predominant uses of each room within the self-built and modified houses were represented in ground plan, based on empirical observation, surveys with dwellers and the use of analytical procedures of morphologic analysis of nature predominantly geometric (specific) and topology (space syntax analysis). A scale of priorities was identified in relation to the uses of each room, its geometrical arrangement (adjacency, front/back relations etc), and underlying structures (connectivity, depth and spatial integration) in order to establish congruencies and non-congruencies between a social-cultural order embedded in the self-built domestic space and the design logic contained in the houses offered by official agencies. The comparative analysis points towards the convivial existence of two tendencies: one that seems to reinforce a design logic inasmuch as the additions and modifications performed by the dwellers do not alter but even emphasize the original configuration of the designed houses, and another one in which those patterns are subverted in accordance with a logic which, to a lesser or greater degree, coincides with that of the self-built dwellings

Musculosidade e composição da perna de ovinos de diferentes genótipos e idades ao abate

Foram avaliadas as características morfológicas da carcaça, musculosidade e composição tecidual da perna de cordeiros criados em regime de pasto, provenientes de ovelhas Romney, acasaladas com três raças paternas (Romney, East Friesian x (Finn x Texel) e Finn x Poll Dorset). Aos 150 e 300 dias de idade, os cordeiros foram abatidos em dois lotes, cada um com 15 animais de cada raça paterna, num total de 90 animais. O grupo oriundo de animais East Friesian x (Finn x Texel) apresentou maior quantidade de músculo na perna (1.975 g) e, em comparação ao grupo Romney, semelhante musculosidade da perna (0,45) e maior relação músculo:osso (7x6,69). A musculosidade da perna nos animais descendentes de Finn x Poll Dorset foi menor (0,44), quando comparada à dos demais grupos. Cordeiros abatidos mais tardiamente apresentaram carcaças mais longas e magras, provavelmente pelas condições adversas do verão e do outono, em que são típicas a menor taxa de crescimento e a qualidade inferior de forragem. O genótipo e a idade de abate influem nas características morfológicas da carcaça, no índice de musculosidade e de composição tecidual da perna dos cordeiros.

Formulação de bloco intertravado cerâmico com adição de resíduos urbanos e industriais

The production of waste from urban and industrial activities is one of the factors of environmental contamination and has aroused attention of the scientific community, in the sense of its reuse. On the other hand, the city of Salvador/Ba, with approximately 262 channels, responsible for storm water runoff, produces every year, by the intervention of cleaning and clearing channels, a significant volume of sediments (dredged mud), and thus an appropriate methodology for their final destination. This study aims to assess the influence of incorporation of these tailings in arrays of clay for production of interlocked block ceramic, also known as ceramic paver. All the raw materials from the metropolitan region of Salvador (RMS) were characterized by x-ray fluorescence, x-ray diffraction, thermal analysis (TG and TDA), particle size analysis and dilatometry. With the use of statistical experimental planning technique, ternary diagram was defined in the study region and the analyzed formulations. The specimens were prepared with dimensions of 60x20x5mm³, by uniaxial pressing of 30 MPa and after sintering at temperatures of 900°, 1000º and 1100ºC the technological properties were evaluated: linear shrinkage, water absorption, apparent porosity, apparent specifies mass, flexural rupture and module. For the uniaxial compression strength used cylindrical probe body with Ø 50 mm. The standard mass (MP) was prepared with 90% by weight of clay and 10% by weight of Channel sediment (SCP), not being verified significant variations in the properties of the final product. With the incorporation of 10% by weight of manganese residue (PFM) and 10% by weight of the Ceramic waste (RCB) in the mass default, in addition to adjusting the plasticity due to less waste clay content, provided increased linear firing shrinkage, due the significant concentration of K2O, forming liquid phase at low temperature, contributing to decreased porosity and mechanical resistance, being 92,5 MPa maximum compressive strength verified. After extract test leachate and soluble, the piece containing 10% of the PFM, was classified as non-hazardous and inert material according to NBR10004/04 ABNT. The results showed the feasibility on using waste, SCP, RCB and PFM clay mass, at temperatures above 900ºC, paver ceramic production, according to the specifications of the technical standards, so that to exceed the 10% of the PFM, it becomes imperative to conduct studies of environmental impacts

Desenvolvimento de membranas porosas de alumina para fins de tratamento de efluente industrial têxtil

Textile production has been considered as an activity of high environmental impact due to the generation of large volumes of waste water with high load of organic compounds and strongly colored effluents, toxic and difficult biodegradability. This thesis deals with obtaining porous alumina ceramic membranes for filtration of textile effluent in the removal of contaminants, mainly color and turbidity. Two types of alumina with different particle sizes as a basis for the preparation of formulation for mass production of ceramic samples and membranes. The technological properties of the samples were evaluated after using sintering conditions: 1,350ºC-2H, 1,450ºC-30M, 1,450ºC-2H, 1,475ºC-30M and 1,475ºC-2H. The sintered samples were characterized by XRD, XRF, AG, TG, DSC, DL, AA, MEA, RL, MRF-3P, SEM and Intrusion Porosimetry by Mercury. After the characterization, a standard membrane was selected with their respective sintering condition for the filterability tests. The effluent was provided by a local Textile Industry and characterized at the entry and exit of the treatment plant. A statistical analysis was used to study the effluent using the following parameters: pH, temperature, EC, SS, SD, oil and grease, turbidity, COD, DO, total phosphorus, chlorides, phenols, metals and fecal coliform. The filtered effluent was evaluated by using the same parameters. These results demonstrate that the feasibility of the use of porous alumina ceramic membranes for removing contaminants from textile effluent with improved average pore size of 0.4 micrometre (distribution range varying from 0,025 to 2.0 micrometre), with total porosity of 29.66%, and average percentages of color removal efficiency of 89.02%, 92.49% of SS, turbidity of 94.55%, metals 2.70% (manganese) to 71.52% (iron) according to each metal and COD removal of 72.80%

Arquitectura e turismo

Dissertação para obtenção do grau de Mestre em Arquitetura, apresentada na Universidade de Lisboa - Faculdade de Arquitetura.