The primary purpose of this study was to compare performance on selected gross motor skills of elementary school-aged children diagnosed as dyslexic and a similar group of school-aged children who are identified as non-dyslexic. A secondary purpose of the study will be to compare performance within the dyslexic group according to the severity of the affliction.

Orientador: Sergio Santos Mühlen / Dissertação (mestrado profissional) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica / Made available in DSpace on 2018-08-18T19:10:57Z (GMT). No. of bitstreams: 1 Hernandes_MarceloRocha_M.pdf: 3294457 bytes, checksum: d5c6210ad1c775f02c1a394d65ab908c (MD5) Previous issue date: 2011 / Resumo: A questão da partida a frio de motores movidos a Diesel ainda é um problema que não foi apropriadamente resolvido e se torna particularmente crítico em face da tendência de redução de níveis de emissões de poluentes a baixas temperaturas e da taxa de compressão do motor visando redução do consumo de combustível. Embora esteja claro que existem alguns fatores-chave que levam a um apropriado processo de partida a frio, sua relevância e relações não são claramente compreendidas. Assim, os esforços para a otimização do processo de partida a frio são principalmente baseados em procedimentos de tentativa e erro em câmaras climáticas a baixas temperaturas, com sérias limitações em termos de confiabilidade da medição em algumas condições, baixa repetibilidade e altos custos com experimentos. O objetivo deste trabalho é estudar os componentes auxiliares de partida a frio dos motores a Diesel com o intuito de adquirir conhecimento sobre este tema para aplicação em propulsores, de maneira que estes possam ser utilizados em regiões com temperaturas negativas com desempenho confiável. Os componentes estudados serão apresentados, bem como sua aplicação e importância na tarefa de proporcionar as condições adequadas à partida a frio do motor. Além disso, uma visão geral será dada em relação à contribuição que estes componentes trazem na redução de emissões de poluentes e consumo de combustível / Abstract: Cold start in Diesel engines is a problem which has not yet been properly solved and becomes particularly critical with the current trend to reduce the emission levels at low temperatures and engine compression ratio addressed to fuel consumption decrease. Although it is clear that there are some key factors whose control leads to a proper cold start process, their individual relevance and relations are not clearly understood. Thereby, the efforts on optimization of the cold start process are mainly based on a trial-and-error procedure in climatic chambers at low ambient temperature, with serious limitations in terms of measurement reliability, low repeatability and high experiments costs. The objective of this work is to study cold start auxiliary components of Diesel engines in order to acquire knowledge on this topic for application in engines in a way that they can be used in regions with low temperatures with reliable performance. The components studied will be presented, as well as its application and importance of providing appropriate conditions to engine cold start. In addition, an overview will be given on the contribution that these components are going to bring in the reduction of emissions and fuel consumption / Mestrado / Eletrônica / Mestre em Engenharia Automobilistica

Orientador : Luiz Fernando Milanez / Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica / Made available in DSpace on 2018-07-18T14:22:40Z (GMT). No. of bitstreams: 1 VelasquezAlegre_JoseAntonioAndres_D.pdf: 6002203 bytes, checksum: 2d564d8f4b0308423291c8de71793152 (MD5) Previous issue date: 1993 / Resumo: Dois modelos de simulação dos processos que ocorrem no motor de ciclo diesel foram desenvolvidos neste trabalho. O primeiro deles, chamado aqui de modelo de diagnose, permite analisar o processo de combustão de um motor real, quando se dispõe do diagrama de pressão no cilindro, determinado experimentalmente. O segundo modelo, chamado de modelo preditivo, permite simular o ciclo completo de um motor real ou hipotético, quando a taxa de queima de combustível é especificada a priori. O modelo preditivo resolve as equações que governam o escoamento transitório de um fluido compressível, como ocorre nos dutos de admissão e escape, utilizando o Método das Características. Os efeitos da variação da área transversal dos dutos, a transferência de calor e o atrito nas paredes são levados em conta. Em ambos os modelos são determinados os termos do balanço de exergia e as exergias química, termomecânica e termoquímica para o volume de controle que inclui os gases no cilindro do motor. Exemplos da aplicação destes modelos são incluídos no presente trabalho / Abstract: Two simulation models of diesel engine processes were developed. The first model, called the diagnose model, allows the analysis of the combustion process of a real engine when the cylinder pressure diagram, obtained from experiments, is available. The second model, called the predictive model, can be used to simulate the entire cycle of real or hipothetical engines, when the fuel burning rate is specified. The predictive model solve the equations governing the transient flow of a compressible fluid occurring in the admission and exhaust ducts, using the M~thod of Characteristics. The eJJects of duct cross sectional area variations, heat transfer and wall friction are taken into account. In both models the terms of the e:ldergy balance as well as chemical, termomechanical and termochemical exergies for the control volume that includes, I the gases in the engine cylinder are determined. Examples of application ofi these models are presented in this work / Doutorado / Doutor em Engenharia Mecânica

Festival de Innovación Educativa de la UPC. Ponente: Mg. Yuliana Meneses / El primer FIE de la UPC es un espacio de docentes para docentes, en donde se compartirán las estrategias innovadoras de aprendizaje que se han venido aplicando en los últimos meses de educación online. Es una oportunidad para intercambiar conocimiento, seguir aprendiendo y atrevernos a innovar como parte del proceso de enseñanza y aprendizaje.

This work is focused on the design of the peristaltic pump drive for medical purposes. Its initial goal is closer introduction of peristaltic pumps and stepper motors. Then the design of BLDC motor will be made and the use of this motor will be compared with stepper motor. Design of the BLDC motor will be made using RMxprt. Last but not least simulations of both types of motors for the peristaltic pump will be created in Simplorer. Finally, the program LabVIEW will be introduced and a program for controlling a stepper motor will be created.

The goal of this thesis is design of universal system for motor control. This device must be able to control at least 4 motors, stepper motors or DC motors. Wired, or wireless communication, using IEEE 802.15.4, is mandatory. The System is based on modular concept. The Basic modules are Control module, Communication module, Connection module and Power module. The system was tested in the control of fertilizer dosing pumps in the greenhouse

The study of motor cortex (dorsal premotor cortex and primary motor cortex) has been greatly aided by the development of a conceptual paradigm that has emerged over the past decade. In contrast to established frameworks, which view neural activity within motor cortex as a representation of particular movement parameters, the ‘dynamical systems paradigm’ posits that motor cortex is best understood via the low-dimensional neural processes that allow the generation of motor commands. This framework largely evolved from, and has been most successfully applied to, simple reaching tasks, where the sequential stages of movement generation are largely separated in time – motor cortex absorbs an input that specifies the identity of the upcoming reach, a second input initiates the movement, and strong, autonomous dynamics generate time-varying motor commands. However, while the dynamical systems paradigm has provided a useful scaffolding for interrogating motor cortex, our understanding of the mechanisms that generate movement is still evolving, and many questions remain unanswered. Prior work has established that the neural processes within motor cortex that generate descending commands are initiated by a large, condition-invariant input. But are movements made under different behavioral contexts initiated via the same mechanisms? Lesion studies suggest that the generation of so-called ‘self-initiated movements’ is uniquely dependent on the supplementary motor area (SMA), a premotor region immediately upstream of motor cortex. In contrast, SMA is thought to be less critical for generating externally-cued movements. To characterize the degree to which SMA is able to impact movement initiation across behavioral contexts, we trained two monkeys to make reaches that were either internally or externally cued. On a subset of trials, we disrupted activity within SMA via microstimulation and asked how this perturbation impacted the monkeys’ behavior. Surprisingly, we found that the effect of stimulation was largely preserved across contexts; the behavioral effects of stimulation could be explained by a simple model in which a context-invariant, time-varying kernel multiplicatively altered the odds of movement initiation. These results suggest that SMA is able to impact movement initiation across behavioral contexts. The question of how sequences of discrete actions are generated has been investigated for over one hundred years. It is commonly thought that once a given sequence (particularly a rapid sequence) becomes well-learned, individual actions that were once produced separately become ‘merged’, such that multiple actions are generated as a single, holistic unit. But what does it mean to generate multiple actions as a single unit? The dynamical systems paradigm offers the ability to translate this notion into specific predictions about the timing and structure of neural activity within motor cortex during sequence production. Importantly, it also offers predictions for the alternative hypothesis – that motor cortex generates the component actions of a sequence independently. To determine whether the production of rapid sequences requires motor cortex to merge multiple actions into a single ‘movement’, we trained monkeys to make sequences of two reaches. Surprisingly, we found that the same set of neural events are used to produce rapid sequences and isolated reaches. Rather than merging individual actions into a single unit, motor cortex generated rapid sequences by overlapping the neural activity related to reach preparation and execution. These results demonstrate that the performance of extremely fast, well-learned movement sequences does not require motor cortex to implement a sequence-specific strategy; the same neural motif that produces a simple reach can also generate movement sequences.

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No description available.

Background Motor vehicle collisions (MVCs) are a common cause of injury and death throughout the world. Following an MVC some patients will remain in their vehicles due to injury, the potential for injury or physical obstruction. Extrication is the process of removing injured or potentially injured patients from vehicles following a motor-vehicle collision. Current extrication practices are based on the principles of 'movement minimisation' with the purpose of minimising the incidence of avoidable secondary spinal injury. Movement minimisation adds time to the process of extrication and may result in an excess morbidity and mortality for patients with time dependent injuries. The current extrication approach has evolved without the application of evidence-based medicine (EBM) principles. The principles of EBM; consideration of the relevant scientific evidence, patient values and preferences and expert clinical judgement are used as a framework for this thesis. Aims and Objectives To develop evidence-based guidance for the extrication of patients trapped in motor vehicles by applying EBM principles to this area of practice. This will be achieved through: - Describing the injury patterns, morbidity and mortality of patients involved in MVCs (trapped and not trapped). - To analyse the movement associated with and the time taken to deliver across a variety of extrication methods. - Determining the perceptions of patients who have undergone vehicle extrication and describe their experiences of extrication. - Developing consensus-based guidelines for extrication.