An?lisis cr?tico del discurso de los memes alusivos al debate sobre paramilitarismo (2014) del Congreso de la Rep?blica de Colombia [recurso electr?nico]

El meme es un tipo de Texto Multimodal que puede ser compuesto por im?genes, ilustraciones est?ticas, o fotos digitalizadas de figuras humanas, animales u objetos, que representan una intenci?n o gesto humor?stico en relaci?n con un texto escrito concreto, adherido a la imagen. Esta composici?n de im?genes y palabras tiene como fin expresar a trav?s del dibujo o personaje, una posici?n o visi?n sat?rica ante una situaci?n descrita y contextualizada en lenguaje escrito; aquello entrev? una narrativa en torno a acontecimientos sociales vigentes. El Debate sobre paramilitarismo que tuvo lugar en el Congreso de la Rep?blica de Colombia a mediados del a?o 2014, gener? durante su transcurso una amplia producci?n y difusi?n de memes en las redes sociales, en los que se evidenciaron las distintas reacciones que produjeron en los colombianos, las situaciones y sucesos desarrollados en el Debate. Desde la perspectiva del An?lisis del Discurso, se analiz? una muestra que const? de cuatro memes para determinar su naturaleza enunciativa y su rol como veh?culo de opini?n.

Ense?ar y aprender a leer cr?ticamente en la escuela : an?lisis de una secuencia did?ctica mediada por TIC para la clase de lengua en s?ptimo grado [recurso electr?nico]

En esta investigaci?n se analizan las implicaciones en la interactividad a partir de la implementaci?n de una secuencia did?ctica mediada por TIC, para ense?ar y aprender a leer cr?ticamente textos de opini?n. La secuencia fue desarrollada en la clase de lengua castellana, en un grupo de grado s?ptimo de una Instituci?n Educativa de la ciudad de Yumbo (Valle del Cauca). El prop?sito del an?lisis es caracterizar las interacciones entre una maestra y sus estudiantes en relaci?n con la mediaci?n del objeto de estudio y, de este modo, efectuar una aproximaci?n a la discusi?n sobre la ense?anza de la lectura cr?tica cuando se incluyen las TIC en el proceso educativo. Esta investigaci?n se inscribe en una perspectiva sociocultural y discursiva de la educaci?n y del lenguaje y hace parte de un proyecto m?s amplio financiado por el MEN, Colciencias y la Universidad del Valle: ?Sistematizaci?n de experiencias pedag?gicas mediadas por TIC? que se desarrolla en el marco de los Centros de Innovaci?n Educativa Regionales (CIER), en este caso, en el CIER Suroccidente.

An?lisis cr?tico del taller de socializaci?n de la cartilla Bunny Bonita, del ministerio de educaci?n nacional de Colombia en el programa nacional de biling?ismo. [recurso electr?nico]

El Programa Nacional de Biling?ismo, actualmente Programa Nacional de Ingl?s1, ha sido Promovido por el Ministerio de Educaci?n Nacional de Colombia desde el a?o 2004. Su principal objetivo es fomentar en los ciudadanos colombianos la capacidad para manejar al menos una lengua extranjera, espec?ficamente el ingl?s. Con esto se busca obtener mano de obra calificada en tiempos de globalizaci?n y brindar las mismas oportunidades a cada colombiano para adquirir esta lengua. Seg?n el Ministerio de Educaci?n Nacional de Colombia: ?Ser biling?e es tener m?s conocimientos y oportunidades para ser m?s competentes y competitivos, y mejorar la calidad de vida de todos los ciudadanos? (MEN, 2005).(Extra?do de una p?gina web) En este trabajo se analiza el discurso dominante que se encuentra en una cartilla taller utilizada en una de las capacitaciones brindadas al cuerpo docente de las instituciones p?blicas, en ella se presenta un material pedag?gico para los niveles de b?sica primaria llamado Bunny Bonita. Tambi?n se utilizan algunos documentos oficiales que dan cuenta del discurso utilizado para presentar los proyectos educativos en Colombia, sobre todo, el discurso relacionado con el Programa Nacional de Ingl?s. El presente trabajo se basa en el modelo de Van Dijk (2010) ?An?lisis Cr?tico Epist?mico del Discurso? ya que sus estrategias de estudio permiten hallar la manera como el conocimiento se construye por parte del discurso de los grupos dominantes. Como resultado, este trabajo muestra por medio del an?lisis de la cartilla de capacitaci?n de Bunny Bonita, que el Programa Nacional de Ingl?s m?s que una soluci?n a los problemas de desigualdad es un proyecto que satisface los intereses de la ?lite colombiana. Adicionalmente muestra c?mo el discurso dominante utilizado es el medio que permite que los colombianos acepten de manera positiva el proyecto y apoyen su ejecuci?n

Discurso institucional e impunidad: an?lisis cr?tico del discurso frente al asesinato del estudiante Jhonny Silva Aranguren [recurso electr?nico]

En toda relaci?n social el lenguaje es parte fundamental para la interacci?n entre lo sujetos. A partir del lenguaje los seres humanos logran entablar comunicaci?n, expresar pensamientos, sentimientos y posiciones, el lenguaje adquiere significado dependiendo de la persona y la comunidad que lo utilice. En esta construcci?n de sentidos, el discurso como acto de comunicaci?n se desarrolla a partir de las relaciones sociales que rigen el contexto y la construcci?n del discurso. Existen distintas formas de elaborar dicho discurso, partiendo del uso de las estructuras gramaticales hasta la adopci?n de un estilo y la utilizaci?n de distintas formas ret?ricas. Estos elementos se emplean con un prop?sito y dependiendo de lo que se quiera obtener a cambio. De un profesor a un estudiante, de un empleador a su empleado, de un gobernante a su pueblo. Cada sujeto tiene una meta a alcanzar y lo hace a trav?s del discurso que utiliza. En medio de todo esto, es posible que el relato de los hechos y los eventos, as? como la respuesta o concepci?n de una comunidad frente a lo ocurrido pueda manipularse desde el manejo del discurso y la informaci?n que se promueva. Para el an?lisis de este discurso institucional y m?s concretamente del corpus se emplear?n una serie de categor?as de an?lisis propuestas por Teun A. Van Dijk (1994-1999-2000) y John B. Thompson (1993),

Biosorption of Cr(III) using in natura and chemically treated tropical peats

The physicochemical characteristics of three Brazilian pears were investigated using elemental analysis, scanning electron microscopy (SEM), X-ray diffractometry (XRD) and studies of Cr(III) biosorption based on adsorption isotherms. Adsorption of Cr(III) by in natura peat from Santo Amaro das Brotas (Sergipe State) was much greater than by peats from either Ribeirao Preto (São Paulo State) or Itabaiana (Sergipe State), with adsorption capacities (q) of 4.90 +/- 0.01, 1.70 +/- 0.01 and 1.40 +/- 0.01 mgg (1), respectively. Pre-treatments with HCl and NaOH + HCl reduced adsorption by the Santo Amaro clas Brotas peat, showing that adsorption efficiency was associated with the amount of organic matter present. Conversely, increase in the mineral content following pre-treatment increased adsorption of Cr(III) by the Ribeirao Preto and Itabaiana peats. Highest adsorption (retention >95.0%) was achieved at equilibrium pH 4.0 using the Santo Amaro das Brotas peat. Experimental data for the adsorption of Cr(III) from aqueous solution onto this peat were fitted to the Langmuir equation, from which an equilibrium adsorption capacity, q(max), of 5.60 mgg(-1) was obtained, which was close to the experimentally determined value. (c) 2008 Elsevier B.V. All rights reserved.

Síntese e caracterização de espinélios a base de Cu, Fe e Cr para pigmentos cerâmicos

Inorganic pigment comprises a host lattice, which is part of the chromophore component (usually a transition metal cation) and possible components modifiers, which stabilize, add or restate the properties pigments. Among the materials with spinel, ferrites, and the chromite stand out, because they have broad technological importance in the area of materials, applicability, pigments, catalytic hydrogenation, thin film, ceramic tiles, among others. The present work, pigments containing CuFe2O4, CuCr2O4,e CuFeCrO4, were synthesized by a method that makes use of gelatin as organic precursor using their application to ceramic pigments. The pigments were characterized by X-ray diffraction (XRD), Infrared spectroscopy, scanning electron microscopy (SEM) spectroscopy in the UV-visible and Colorimetry. The results confirmed the feasibility of the synthetic route used, with respect to powders synthesized, there is the formation of spinel phase from 500°C, with an increase in crystallinity and the formation of other phases. The pigments were shown to be crystalline and the desired phases were obtained. The copper chromite have hues ranging from green to black according to the calcination temperature, while the copper chromite doped with iron had brownish. The ferrites showed copper color and darker brown to black, which may indicate an interesting factor because of the importance of black pigment

Influência do número de refundições da liga Ni-Cr-Mo-Ti sobre as propriedades de próteses metalocerâmicas

A frequently encountered difficulty in oral prosthetics is associated with the loss of metallic alloys during the melting stage of the production of metal-ceramic replacement systems. Remelting such materials could impar their use in oral rehabilitation due to loss in esthetics, as well as in the chemical, physical, electrochemical and mechanical properties. Nowadays, the Ni-Cr-Mo-Ti alloy is widely used in metal-ceramic systems. Manufacturers state that this material can be remelted without significant alterations in its behavior, however little has been established as to the changes in the performance of this alloy after successive remelting, which is common practice in oral prosthetics. Therefore, the objective of this study was to evaluate possible changes in the esthetics and associated properties of metalceramic samples consisting of Ni-Cr-Mo-Ti and dental porcelain. Three to five remelting steps were carried out. The results revealed that Ni-Cr-Mo-Ti can be safely used even after three remelting steps. Further remelting significantly affect the characteristics of the alloys and should not be recommended for the manufacture of metal-ceramic systems

Plan of the town of Alexandria, D.C. with the environs : exhibiting the outlet of the Alexandria Canal, the shipping channel, wharves, Hunting Cr. &c. /

Relief shown by hachures. Depths shown by contours.

Caracterização Microestrutural e Tribocorrosiva de Sistemas Metalocerâmicos Odontológicos do Tipo Ni-Cr/Porcelana E Ni-Cr/Ti/Porcelana

The partial fixed prosthodontics restoration is used to rehabilitate form and function of partial or total compromised teeth, having to remain permanently joined to remainder tooth. The most useful material on prosthodontics is the feldspar porcelain, commercialized as aluminosilicate powders. Dental porcelains are presented with limited mechanical properties to rehabilitate extensive spaces. The association with Ni-Cr metallic systems (metal-ceramic system) allows that the metallic substructure compensates the fragile porcelain nature, preserving the thermal insulation and aesthetics desirable, as well as reducing the possibility of cracking during matication efforts. Cohesive flaws by low mechanical strength connect the metallic substructure to the oral environment, characterized by a electrolytic solution (saliva), by aggressive temperature, pH cyclic changes and mechanical requests. This process results on ionic liberation that could promote allergic or inflammatory responses, and/or clinical degradation of ceramometal system. The aim of this study was to evaluate the presence of an intermediate titanium layer on the microscopic fracture behavior of porcelains on ceramometal systems. Plasma deposition of titanium films result in regular passivating oxide layers which act as barriers to protect the metallic substrate against the hazardous effects of corrosive saliva. Tribocorrosion tests were performed to simulate the oral environment and mechanical stress, making it possible the early detection of crack formation and growth on metal-ceramic systems, which estimate the adherence between the compounds of this system. Plain samples consisting of dental feldspar porcelain deposited either onto metallic substrates or titanium films were fired and characterized by scanning electron microscopy. The result showed that the titanium film improved the adherence of the system compared to conventional metal-ceramic interfaces, thus holding crack propagation

Estudio de evolución microestructural de una superaleación base Ni-Cr-Mo bajo diferentes condiciones termomecánicas

El presente trabajo de investigación tuvo como objetivo principal, el determinar y caracterizar la microestructura de una superaleación Inconel 625 antes y después de pasar por procesos termomecánicos, con el fin de comprender su evolución microestructural y sus fases presentes. Para cumplir este objetivo se propuso realizar una caracterización microestructural antes y después de una serie de trabajos termomecánicos, los cuales se realizaron ensayos mecánicos de compresión en caliente a diferentes temperaturas (900ºC, 950°C, 1000°C, 1050°C) a diferentes velocidades de deformación (0.1 mm/s, 0.01 mm/s), en muestras previamente solubilizadas a 1150°C por 1 hora. Esto con la finalidad de caracterizar el material bajo estas condiciones termomecánicas, esto con el fin de observar la formación de fases y precipitación de carburos, todo esto mediante el uso de técnicas como Difracción de Rayos X, Análisis Térmico, Microscopia Óptica, y Microscopia Electrónica de Barrido.

Extração de metais (K, Mg, Ba, Ca, Cr, Mn, Li, Fe) de água produzida utilizando sistema microemulsionado

The produced water is a byproduct formed due to production of petroleum and carries with it a high amount of contaminants such as oil particles in suspension, organic compounds and metals. Thus, these latter pollutants are very difficult to treat because of its high solubility in water. The objective of this work is to use and evaluate a microemulsioned system to remove metals ( K , Mg , Ba , Ca , Cr , Mn , Li , Fe ) of synthetic produced water. For the extraction of metals, it was used a pseudoternary diagram containing the following phases: synthetic produced water as the aqueous phase (AP), hexane as organic phase (OP), and a cosurfactant/surfactant ratio equal to four (C/S = 4) as the third phase, where the OCS (saponified coconut oil) was used as surfactant and n-butanol as cosurfactant. The synthetic produced water was prepared in a bench scale and the region of interest in the diagram for the removal of metals was determined by experimental design called. Ten points located in the phase Winsor II were selected in an area with a large amount of water and small amounts of reagents. The samples were analyzed in atomic absorption spectrometer, and the results were evaluated through a statistical assesment, allowing the efficiency analysis of the effects and their interactions. The results showed percentages of extraction above 90% for the metals manganese, iron, chromium, calcium, barium and magnesium, and around 45% for metals lithium and potassium. The optimal point for the simultaneous removal of metals was calculated using statistical artifact multiple response function (MR). This calculation showed that the point of greatest extraction of metals occurs was the J point, with the composition [72% AP, 9% OP, 19% C/S], obtaining a global extraction percentage about 80%. Considering the aspects analyzed, the microemulsioned system has shown itself to be an effective alternative in the extraction of metals on synthetic produced water remediation

Síntese, caracterização e aplicação de nanoadsorventes magnéticos visando à remoção de Cr(VI) de águas residuais

Dissertação (mestrado)—Universidade de Brasília, Faculdade UnB Planaltina, Mestrado em Ciências de Materias, 2016.