Eulerian-Lagrangian two phase debris flow model

The main objective of this work is to develop a quasi three-dimensional numerical model to simulate stony debris flows, considering a continuum fluid phase, composed by water and fine sediments, and a non-continuum phase including large particles, such as pebbles and boulders. Large particles are treated in a Lagrangian frame of reference using the Discrete Element Method, the fluid phase is based on the Eulerian approach, using the Finite Element Method to solve the depth-averaged Navier-Stokes equations in two horizontal dimensions. The particle’s equations of motion are in three dimensions. The model simulates particle-particle collisions and wall-particle collisions, taking into account that particles are immersed in a fluid. Bingham and Cross rheological models are used for the continuum phase. Both formulations provide very stable results, even in the range of very low shear rates. Bingham formulation is better able to simulate the stopping stage of the fluid when applied shear stresses are low. Results of numerical simulations have been compared with data from laboratory experiments on a flume-fan prototype. Results show that the model is capable of simulating the motion of big particles moving in the fluid flow, handling dense particulate flows and avoiding overlap among particles. An application to simulate debris flow events that occurred in Northern Venezuela in 1999 shows that the model could replicate the main boulder accumulation areas that were surveyed by the USGS. Uniqueness of this research is the integration of mud flow and stony debris movement in a single modeling tool that can be used for planning and management of debris flow prone areas.

Eulerian-Lagrangian Two Phase Debris Flow Model

The main objective of this work is to develop a quasi three-dimensional numerical model to simulate stony debris flows, considering a continuum fluid phase, composed by water and fine sediments, and a non-continuum phase including large particles, such as pebbles and boulders. Large particles are treated in a Lagrangian frame of reference using the Discrete Element Method, the fluid phase is based on the Eulerian approach, using the Finite Element Method to solve the depth-averaged Navier–Stokes equations in two horizontal dimensions. The particle’s equations of motion are in three dimensions. The model simulates particle-particle collisions and wall-particle collisions, taking into account that particles are immersed in a fluid. Bingham and Cross rheological models are used for the continuum phase. Both formulations provide very stable results, even in the range of very low shear rates. Bingham formulation is better able to simulate the stopping stage of the fluid when applied shear stresses are low. Results of numerical simulations have been compared with data from laboratory experiments on a flume-fan prototype. Results show that the model is capable of simulating the motion of big particles moving in the fluid flow, handling dense particulate flows and avoiding overlap among particles. An application to simulate debris flow events that occurred in Northern Venezuela in 1999 shows that the model could replicate the main boulder accumulation areas that were surveyed by the USGS. Uniqueness of this research is the integration of mud flow and stony debris movement in a single modeling tool that can be used for planning and management of debris flow prone areas.

Possibilidades de enfoque CTS para o ensino superior de química: proposta de uma abordagem para ácidos e bases

Scientific education has been passing by redefinitions, contestations and new contributions from the research on science teaching. One contribution is the idea of science and technology literacy, allowing the citizens not only knowing science but also understand aspects on the construction and motivation of scientific and technological research. In accordance with this idea, there is the Science-Technology-Society (STS) studies which, since the 1970s, has been contributing for science teaching and learning according to the comprehension of the relationships with society in the Western countries of the North. In Brazil, this approach began to gain projection from the 1990s when the first essays on the theme were published. Currently, there is a clear influence of this approach on the national curriculum guidelines, especially for the area of Natural Sciences, and also on the textbooks chosen by the High School National Program (Programa Nacional do Ensino Médio). However, there seems to be a gap in relation to the discussion on the specific curricular component seen in college on this approach. Thus, this study aims at adopting the approach STS, face to the preparation of complimentary educational material on acid and bases concepts studied in the course of General Chemistry of the Natural Sciences graduation program. To this end, it was performed a bibliographical research aiming at making the state-of-the-art in in these concepts in specific literature to science teaching. It is divided in two stages: systematic study (with sixteen journals chosen according to Qualis-Capes and an unsystematic study with direct search in databases and references in the papers of the systematic study. The studies had their content analyzed and the categories chosen a priori were the level of education, the acid-base theory adopted, and the strategy/theoretical frame of reference adopted. A second stage aimed at identifying attitudes and beliefs on STS (Science-Technology-Society) and CSE (Chemistry-Society-Environment) of students in the teacher and technologist training course in three diferent institutions: UTFPR, UFRN and IFRN. In this study, it was used two questionnaires, composed of a Likert scale, semantic differential scale and open questions. The quantitative data reliability was estimated through Cronbach’s alpha method, and tha data were treated according to classic statistics, using the mean as the centrality measures, and the mean deviation as dispersion. The qualitative data were treated according to the content analysis with categories taken from the reading of answers. In the third stage, it was analyzed the presence of STS and CSE content in chapters on acid and bases concepts of nine General Chemistry textbooks, frequently used in graduation programs in public institutions of the state of Rio Grande do Norte. The results showed that there are few proposals of acid and bases teaching, and they are generally aimed at High School or at instrumentation for teaching courses, and no course for General Chemistry. The student’s attitudes and beliefs show the presence of a positivist point of view based on the concept of Science and Technology neutrality and the salvation of its mediation. The books analysis showed just a few content on STS and CSE are found in the studied chapters, and they are generally presented disjointedly in relation to the rest of the main text. In the end, as suggestion to solve the absence of proposals STS in General Chemistry books, as well as the student’s positivist attitudes, it was developed some educational material to be used in the course of General Chemistry at College. The material is structured to introduce a historical view of the concepts preparation, present the use of materials, the industrial and technological processes, and social and environmental consequences of this activities

An augmented reality pipeline to create scenes with coherent illumination using textured cuboids

Shadows and illumination play an important role when generating a realistic scene in computer graphics. Most of the Augmented Reality (AR) systems track markers placed in a real scene and retrieve their position and orientation to serve as a frame of reference for added computer generated content, thereby producing an augmented scene. Realistic depiction of augmented content with coherent visual cues is a desired goal in many AR applications. However, rendering an augmented scene with realistic illumination is a complex task. Many existent approaches rely on a non automated pre-processing phase to retrieve illumination parameters from the scene. Other techniques rely on specific markers that contain light probes to perform environment lighting estimation. This study aims at designing a method to create AR applications with coherent illumination and shadows, using a textured cuboid marker, that does not require a training phase to provide lighting information. Such marker may be easily found in common environments: most of product packaging satisfies such characteristics. Thus, we propose a way to estimate a directional light configuration using multiple texture tracking to render AR scenes in a realistic fashion. We also propose a novel feature descriptor that is used to perform multiple texture tracking. Our descriptor is an extension of the binary descriptor, named discrete descriptor, and outperforms current state-of-the-art methods in speed, while maintaining their accuracy.

A MULHER ALÉM DO BEM E DO MAL: Malévola e a representação cinematográfica do feminino integrado

Estudo sobre as construções simbólicas e identitárias da mulher presentes na narrativa e na estrutura das personagens femininas do filme Malévola (2014) – produção dos estúdios Disney (EUA). A narrativa é inspirada no conto de fadas “A Bela Adormecida do Bosque” e distingue-se pela perspectiva feminina, modificando as possibilidades de interpretação, além de possibilitar a quebra do paradigma dicotômico relacionado ao Bem e ao Mal. A pesquisa tem por objetivo estudar a evolução das construções imaginárias da mulher no cinema e traçar paralelos entre as características arquetípicas das personagens de Malévola em relação à identidade da mulher na contemporaneidade. Para tal, será tomado como referencial teórico os estudos do imaginário social, com as obras de Gilbert Durand, Edgar Morin e, em especial, Michel Maffesoli; conceitos da psicanálise a partir dos trabalhos de C.G. Jung, Erich Neumann, Marie-Louise Von Franz e Clarissa Pinkola Estés; as teorias de Stuart Hall, Laura Mulvey e Gilles Lipovetsky relacionadas aos estudos culturais com ênfase em gênero; e também o ecofeminismo através dos trabalhos de autoras como Vandana Shiva e Maria Mies. Nosso referencial teórico-metodológico é a Hermenêutica de Profundidade (HP) visando à interpretação da estrutura simbólica de nosso objeto. Resultam desta pesquisa a verificação de um processo de saturação de padrões identitários e simbólicos provindos da modernidade e a evolução de novas dinâmicas nas narrativas presentes nas mídias e na comunicação.

Seawater carbonate chemistry, sample density and Strongylocentrotus purpuratus size, filtering and respiration rate during experiments, 2011

Anthropogenic CO2 emissions are acidifying the world's oceans. A growing body of evidence is showing that ocean acidification impacts growth and developmental rates of marine invertebrates. Here we test the impact of elevated seawater pCO2 (129 Pa, 1271 µatm) on early development, larval metabolic and feeding rates in a marine model organism, the sea urchin Strongylocentrotus purpuratus. Growth and development was assessed by measuring total body length, body rod length, postoral rod length and posterolateral rod length. Comparing these parameters between treatments suggests that larvae suffer from a developmental delay (by ca. 8%) rather than from the previously postulated reductions in size at comparable developmental stages. Further, we found maximum increases in respiration rates of + 100 % under elevated pCO2, while body length corrected feeding rates did not differ between larvae from both treatments. Calculating scope for growth illustrates that larvae raised under high pCO2 spent an average of 39 to 45% of the available energy for somatic growth, while control larvae could allocate between 78 and 80% of the available energy into growth processes. Our results highlight the importance of defining a standard frame of reference when comparing a given parameter between treatments, as observed differences can be easily due to comparison of different larval ages with their specific set of biological characters.

Normalisering av ungdomar i problem genom styrning av föräldrar : Från strukturella orsaksförklaringar till familjecentrerade lösningar

Normalizing problematized youth by governing their parents: From structural explanations to family-centred solutions The current article explores the ways that organizational representatives outline the causes of and propose solutions to the problematic behaviour of youth living in, what is described as, an immigrant neighbourhood in a Swedish city. The empirical material, consisting of interviews with representatives from various organizations (such as the police, schools, social services and NGOs) as well as field observations, has been analyzed using the theory of governmentality. The causes of problematic youth behaviour are related to disadvantaged immigrant urban space, unemployment, unstable home situations and family relations, and parents’ deviant norms, knowledge and culture. In the discourses about causes and solutions, a recurring frame of reference is the issue of immigration in general and parent’s migrant background in particular. In spite of the complexity of the proposed causes, the pronounced solutions are directed towards the fostering of immigrant parents, the establishment of zones of communication and early prevention. Hence, the prevailing solutions are permeated by discourses of activation of parents.

"Det handlar om att nå ett resultat" : En fallstudie om partsrelationer och förhandling under en omstruktureringsprocess

Syftet med denna uppsats är att undersöka relationerna mellan parterna under en omstruktureringsprocess. Syftet är också att granska nedläggningsprocessen samt när lagar och avtal träder in. Uppsatsens referensram tar upp nedläggningsprocesser av Rydell (2015) och Wigblad & Österberg (2009), den svenska modellen med lagar och avtal Elvander (1995) Iseskog (2014) förtroende och förhandling Fischer et al. (1992) och Walter & McKersie (1991). Med hjälp av dessa begrepp och modeller analyseras och tolkas relationerna i en nedläggningsprocess vid SSAB i Borlänge, där 210 medarbetare varslades i början av 2015. Av dem var 170 kollektivanställda. Nedläggningsprocessen genomfördes med hjälp av Trygghet- och Flexibilitetavtalet (ToF), utan att någon tillsvidareanställd förlorade sitt arbete. Undersökningen bygger på kvalitativ forskning med semistrukturerade expertintervjuer där sammanlagt fem respondenter från SSAB och IF Metall intervjuades. Dessa respondenter var nyckelpersoner under nedläggningsprocessen och förhandlingsprocessen. Resultatet av intervjuerna har analyserats och tematiserats utifrån referensramen. Studiens resultat visar att goda relationer mellan parterna ger enklare förhandlingar med framgångsrika resultat. Samverkan mellan parterna bygger på ett långvarigt ömsesidigt förtroende. Detta förtroende är av vikt för att samverkan skall bli till verklighet.

Intern kontroll: En fallstudie på Trafikverket

Internal control is something that’s grown more important for enterprises to keep in mind. The community is increasingly affected by the IT-development which demands a bigger degree of security. Enterprises needs to make sure that their systems are up to date and secure enough to keep it safe from unauthorized to take part of sensitive information. Internal control can exist in a major part of the work. If an enterprise have a goal for no harm or serious injury at work, internal control is necessary to reach that goal. The purpose for this essay is to examine how five different departments of Trafikverket practices internal control. How internal control is described. How the guidance from the managements is described and how it reaches the rest of the enterprise. This will lead to a proposal of improvement of the internal control at Trafikverket. We focus our frame of reference on the COSO-model and its five components. The components included in the COSO-model are control environment, risk valuation, control activities, information and communication and monitoring. The essay is a case-study of Trafikverket. We have chosen a qualitative method and interviewed five respondents from the different departments on Trafikverket. The respondents we interviewed works with internal control in their everyday work or have a god insight in the subject. We used a semi structured interview guide with questions based on the COSO framework. The results from our study shows that it exist big variations between how the departments work with internal control. It emerged that there are new guidelines for how the work should be done. This makes it necessary with education to implement the new ways to work. How the departments use the COSO-model varies. Some of them have incorporated the model in their new ways to work others have never heard of it. The conclusion of our study shows that the COSO-model and it´s components contribute to a functioning internal control. Implementing the components is important and the most important feature to good internal control is the corporate management. Education within the enterprise is the most effective way to inform the staff about the model and to implement it.

Shakespeare and the Colonial Encounter in India in the Eighteenth and Nineteenth Centuries

Thesis (Ph.D.)--University of Washington, 2016-03

Relatório de estágio de qualificação profissional

Relatório EPE - Relatório de estágio em Educação Pré-Escolar: O presente Relatório de Estágio de Qualificação Profissional situa-se no contexto de Educação Pré-Escolar, tendo como propósito revelar o que foi sendo realizado no Centro Social da Paróquia Nossa Senhora da Ajuda ao longo de quatro meses em contexto de creche. A prática educativa sustentou-se num quadro teórico-concetual de referência, com vista à construção de saberes para a Educação de Infância, pelo compromisso e responsabilização progressiva da ação docente, tendo sido encarado como um momento de singular importância. O contexto de formação assumiu-se, portanto, como um lugar privilegiado de articulação entre teoria e prática, onde o processo de ensino e aprendizagem ficou pautado por intencionalidades educativas com vista ao desenvolvimento integral de cada criança, bem como para a construção de saberes e competências profissionais. No âmbito da investigação-ação e associada à observação, à planificação, à avaliação e à ação propriamente dita, esteve sempre presente a comunicação e a articulação, pois são estas etapas interligadas que revelam a intencionalidade do processo educativo que carateriza a intervenção profissional do educador. A reflexão evidenciou-se também fulcral, pois só mediante uma reflexão na ação e sobre a ação é possível uma introspeção pessoal, despoletando uma compreensão mais sustentada da ação, facilitando a tomada de decisões conscientes. Salienta-se, ainda, a importância de uma formação profissional ao longo da vida, de modo a potenciar o desenvolvimento de uma atitude perante a Educação cada vez mais crítica, indagadora e reflexiva, em prol do desenvolvimento de cada criança.

Relato integrado: utopia ou realidade

Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Contabilidade e Finanças

Die mißverstandene Krise. Theoriedefizite in der umweltpädagogischen Kommunikation

Der Beitrag stellt den Versuch dar, unzureichende Annahmen über Mensch und Gesellschaft in der umweltpädagogischen Literatur zu identifizieren und zur Diskussion zu stellen. Dazu bietet der Verfasser zunächst einen Reflexionsrahmen an, der am Beispiel der Aufstellung einer Prioritätenliste für Maßnahmen gegen die Luftverschmutzung auf die Schwierigkeiten aufmerksam machen soll, die auftreten, wenn man sich in einer als Ganzes nicht überschaubaren Gesellschaft um Verständigung über die Umweltkrise bemüht. Danach analysiert der Verfasser einige in der umweltpädagogischen Literatur verbreitete Stellungnahmen zur Beschreibung, Erklärung und Eindämmung der Umweltkrise. Er kommt zu dem Ergebnis, daß Ignoranz gegenüber den Verständigungsschwierigkeiten über die Umweltkrise fundamentalistischen Behauptungen über Menschen und Gesellschaft in der umweltpädagogischen Literatur Vorschub leistet. (DIPF/Orig.)

Estudio comparativo de cuatro factores: depresión, somatización, ansiedad y agotamiento en dos empresas colombianas

En el transcurso de los últimos años se ha evidenciado con mayor frecuencia la influencia de factores sociales en el desarrollo de síntomas como estrés, depresión, ansiedad, somatización, entre otras. Dentro del ámbito laboral han surgido enfermedades que parten de condiciones sociales y de la interrelación de sus empleados dentro de la organización. Este estudio tuvo como finalidad revisar y analizar la información referente a la influencia de los entornos laborales y factores psicosociales que pueden incurrir en el desarrollo de psicopatología en el trabajo. Como apoyo en el análisis de las distintas teorías que surgen alrededor de esta temática y teniendo como marco de referencia la descripción de los factores que influyen en el desarrollo de estas, se aplicó, el cuestionario QDS4 adaptado por Castillo (2010), cuestionario que buscó analizar las diferentes sintomatologías en dos empresas de distintos sectores en la ciudad de Bogotá, Colombia. Generando un sondeo sobre la presencia y posible desarrollo de estas cuatro sintomatologías dentro de cada una de las organizaciones.

A motivação dos docentes no ensino superior face ao processo de Bolonha: um estudo de caso

Este trabalho pretende estudar a motivação dos docentes da licenciatura de radioterapia da Escola Superior de Tecnologias da Saúde de Lisboa, face ao processo de Bolonha. Realizou-se um enquadramento teórico dos conceitos base, como motivação e processo de Bolonha. O estudo foi definido como um estudo de caso, com uma amostra de 3 elementos. Aplicou-se três entrevistas a cada um dos entrevistados, denominadas por entrevista, entrevista reflexiva e entrevista reflexiva aprofundada. Para a análise dos dados utilizou-se um software de análise de conteúdo -AQUAD 6.0. Os resultados são apresentados em forma de tabelas e segmentos de texto extraídos do software. Na discussão dos resultados verifica-se que de uma forma geral os resultados vão ao encontro da literatura existente e nas considerações finais respondem-se às questões de investigação inicialmente realizadas, mas também são apresentadas as limitações ao estudo, bem como futuras investigações. ABSTRACT: lt is intended with this work to study the motivation of the radiotherapy graduated professors of the Higher School of Health Technology of Lisbon, regarding the Bologna process. lt was performed a theoretical frame of reference of the basic concepts such as motivation and the Bologna Process. The study was defined as a case study, with a sample of three elements. Three interviews were performed to each interviewed person, defined as interview, reflexive interview and deepened reflexive interview. For the data analysis it was used a content analysis software - AQUAD 6.0. The results are presented in table form and with text sectors obtained from the software. ln the discussion of the results one comes to the conclusion that, in general, they match the available literary writings and in the final reflexions it is answered to the investigation questions initially asked but also presented the study limitations as well as future investigations.