Automatização de um dinamômetro hidráulico para ensaios de motores de combustão interna

Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Mecânica, 2015.

Estilos de crianza parentales en familias indígenas Cañaris inmigrantes en Cuenca

La presente investigación es de corte cualitativa, a nivel exploratorio-descriptivo, cuyo propósito es identificar los estilos de crianza de familias indígenas migrantes en Cuenca, así como caracterizar la estructura familiar de dichas familias, para lo cual se aplicó dos instrumentos. Para la obtención de la información sobre estilos de crianza parental se trabajó con algunos ítems del cuestionario de Susana Torío (2008), especialmente los apartados de tendencias actitudinales educativas, cuyos ítems fueron utilizados como preguntas dentro una entrevista semiestructurada;para la caracterización de la estructura familiar se trabajó con una entrevista semiestructurada denominada La estructura familiar del niño víctima y agresor de acoso escolar, elaborada por Ordóñez y Mazón (2014), estos instrumentos fueron aplicados acinco familias indígenas que viven en Cuenca alrededor de 10 años. Los resultados muestran una tendencia actitudinal educativa de los padres hacia el cuidado de sus hijos de corte flexible/democrático. Con relación a la estructura familiar referente al sub sistema conyugal se evidencian límites y fronteras flexibles; sin embargo, la construcción de reglas no son claras, situación que podría estar enmarcada en su condición de migración y su proceso de adaptación. Dentro del subsistema parental, los límites, jerarquías y reglas son flexibles. El rol descriptivo y la función afectiva en las familias del estudio se centran mayoritariamente en la madre;no obstante, el padre también es involucrado dentro del proceso de socialización de los hijos.

Estruturação e gestão da secretaria especial de saúde indígena : caminhos, atores e institucionalidade

Mestrado (dissertação)—Universidade de Brasília, Faculdade de Ciências da Saúde, Programa de Pós-Graduação em Saúde Coletiva, 2016.

Qualidade de vida no trabalho e o acolhimento como intervenção

A qualidade de vida no trabalho é, cada vez mais, tema de relevância no mundo atual. As organizações estão atentas aos conflitos existentes dentro do tema e a forma mais adequada de se lidar com ele, no sentido de propiciar, aos sujeitos no mundo do trabalho, mais dignidade em seu cotidiano laboral. A evolução da qualidade de vida no trabalho dentro do Instituto Federal Minas Gerais– Campus Ouro Preto foi o objetivo deste estudo, mas, principalmente, verificou-se uma estratégia de intervenção para a evolução da qualidade de vida no trabalho: o acolhimento. Para tanto, era necessário saber que tipo de situações acontecem dentro do universo do trabalho que interferem na sua produção e na qualidade de vida. Também era importante conhecer a motivação, a saúde mental e o trabalho, enfim, as contextualizações conceituais que embasassem o universo da qualidade de vida no trabalho, e como o acolhimento como estratégia de intervenção poderia ser utilizado. Para que a estratégia de intervenção tivesse uma linha de condução eficaz, algumas informações relevantes foram utilizadas, como os dados do órgão responsável pela saúde ocupacional do servidor público federal, o SIASS (Subsistema Integrado de Atenção a Saúde do Servidor), e um estudo piloto sobre Qualidade de Vida no Trabalho, também elaborado pelo SIASS, dentro da instituição em questão. A elaboração do projeto permitiu-nos concluir que, dentro do universo institucional de educação, o acolhimento como forma preventiva de vários tipos de desgaste pode ser um instrumento pertinente e eficaz.

A INFLUÊNCIA DO ESTOQUE DE MATÉRIA ORGÂNICA DO SOLO EM FRAGMENTOS FLORESTAIS DE MATA ATLÂNTICA

In the Atlantic forest biome, very fragmented and with high diversity of ecosystems, of species, and high endemism degree, the maintenance of the status of the biological diversity presupposes the recovery and conservation of the mosaic of existent fragments. In that context, the use of global functional indicators for the evaluation of the state of conservation of fragments, for the character of systemic synthesis that they act becomes interesting. In tropical forests ecosystems, the surface organic matter stock of the soil is one functional indicator of the decomposition subsystem and they are responsible in big measured by the maintenance and survival of the communities of those ecosystems group. The human action when fragmenting the forest ecosystems, as it substitutes the native forest for different forms of use of the soil, it creates different head offices that they exercise pressures differentiated on the fragment and, consequently, on the operation of the fundamental processes of the ecosystem that represents it. Thus, in the sense of understanding the state of functional conservation of fragments forest remainders of the Atlantic forest, in the extent of the Environmental Protection Area of Petrópolis - Rio de Janeiro, which interferes in the Mosaic of Units of Conservation of the Fluminense Central Atlantic forest and, in a larger scale still, in the Ecological Corridor of the Serra do Mar, in the present study the stock of organic matter of surface of four forest fragments in summer of 2008 and summer of 2009 are analyzed comparatively.

Distributed non-cooperative robust economic predictive control for dynamically coupled linear systems.

In this thesis, a tube-based Distributed Economic Predictive Control (DEPC) scheme is presented for a group of dynamically coupled linear subsystems. These subsystems are components of a large scale system and control inputs are computed based on optimizing a local economic objective. Each subsystem is interacting with its neighbors by sending its future reference trajectory, at each sampling time. It solves a local optimization problem in parallel, based on the received future reference trajectories of the other subsystems. To ensure recursive feasibility and a performance bound, each subsystem is constrained to not deviate too much from its communicated reference trajectory. This difference between the plan trajectory and the communicated one is interpreted as a disturbance on the local level. Then, to ensure the satisfaction of both state and input constraints, they are tightened by considering explicitly the effect of these local disturbances. The proposed approach averages over all possible disturbances, handles tightened state and input constraints, while satisfies the compatibility constraints to guarantee that the actual trajectory lies within a certain bound in the neighborhood of the reference one. Each subsystem is optimizing a local arbitrary economic objective function in parallel while considering a local terminal constraint to guarantee recursive feasibility. In this framework, economic performance guarantees for a tube-based distributed predictive control (DPC) scheme are developed rigorously. It is presented that the closed-loop nominal subsystem has a robust average performance bound locally which is no worse than that of a local robust steady state. Since a robust algorithm is applying on the states of the real (with disturbances) subsystems, this bound can be interpreted as an average performance result for the real closed-loop system. To this end, we present our outcomes on local and global performance, illustrated by a numerical example.

Model-Based validation of Driver Drowsiness Detection System for ADAS

The work described in this Master’s Degree thesis was born after the collaboration with the company Maserati S.p.a, an Italian luxury car maker with its headquarters located in Modena, in the heart of the Italian Motor Valley, where I worked as a stagiaire in the Virtual Engineering team between September 2021 and February 2022. This work proposes the validation using real-world ECUs of a Driver Drowsiness Detection (DDD) system prototype based on different detection methods with the goal to overcome input signal losses and system failures. Detection methods of different categories have been chosen from literature and merged with the goal of utilizing the benefits of each of them, overcoming their limitations and limiting as much as possible their degree of intrusiveness to prevent any kind of driving distraction: an image processing-based technique for human physical signals detection as well as methods based on driver-vehicle interaction are used. A Driver-In-the-Loop simulator is used to gather real data on which a Machine Learning-based algorithm will be trained and validated. These data come from the tests that the company conducts in its daily activities so confidential information about the simulator and the drivers will be omitted. Although the impact of the proposed system is not remarkable and there is still work to do in all its elements, the results indicate the main advantages of the system in terms of robustness against subsystem failures and signal losses.

Some aspects of grading Java code submissions in MOOCs

Recently, massive open online courses (MOOCs) have been offering a new online approach in the field of distance learning and online education. A typical MOOC course consists of video lectures, reading material and easily accessible tests for students. For a computer programming course, it is important to provide interactive, dynamic, online coding exercises and more complex programming assignments for learners. It is expedient for the students to receive prompt feedback on their coding submissions. Although MOOC automated programme evaluation subsystem is capable of assessing source programme files that are in learning management systems, in MOOC systems there is a grader that is responsible for evaluating students’ assignments with the result that course staff would be required to assess thousands of programmes submitted by the participants of the course without the benefit of an automatic grader. This paper presents a new concept for grading programming submissions of students and improved techniques based on the Java unit testing framework that enables automatic grading of code chunks. Some examples are also given such as the creation of unique exercises by dynamically generating the parameters of the assignment in a MOOC programming course combined with the kind of coding style recognition to teach coding standards.

Mars delivery service - development of the electro-mechanical systems of the Sample Fetch Rover for the Mars Sample Return Campaign

This thesis describes the development of the Sample Fetch Rover (SFR), studied for Mars Sample Return (MSR), an international campaign carried out in cooperation between the National Aeronautics and Space Administration (NASA) and the European Space Agency (ESA). The focus of this document is the design of the electro-mechanical systems of the rover. After placing this work into the general context of robotic planetary exploration and summarising the state of the art for what concerns Mars rovers, the architecture of the Mars Sample Return Campaign is presented. A complete overview of the current SFR architecture is provided, touching upon all the main subsystems of the spacecraft. For each area, it is discussed what are the design drivers, the chosen solutions and whether they use heritage technology (in particular from the ExoMars Rover) or new developments. This research focuses on two topics of particular interest, due to their relevance for the mission and the novelty of their design: locomotion and sample acquisition, which are discussed in depth. The early SFR locomotion concepts are summarised, covering the initial trade-offs and discarded designs for higher traverse performance. Once a consolidated architecture was reached, the locomotion subsystem was developed further, defining the details of the suspension, actuators, deployment mechanisms and wheels. This technology is presented here in detail, including some key analysis and test results that support the design and demonstrate how it responds to the mission requirements. Another major electro-mechanical system developed as part of this work is the one dedicated to sample tube acquisition. The concept of operations of this machinery was defined to be robust against the unknown conditions that characterise the mission. The design process led to a highly automated robotic system which is described here in its main components: vision system, robotic arm and tube storage.

Design of a UHF-band transceiver module for nano-satellite applications

The thesis presents the UHF band transceiver project carried out under the lead of Spacemind company. In particular reports the outcome of the first phase of the project encompassing management tasks, requirements definition and the first electrical design. Then follows the study of the UHF band antenna which develops in parallel with the transceiver. The antenna plus the transceiver will be sold together as a complete UHF telecommunication system for cubesats made by Spacemind. As a main result, this work contributed to the design and manufacturing of the first transceiver prototype.