The purpose of this thesis is a design of an automated heating regulation system for an old building. The thesis consists of a system architecture design, an implementation of the system, including prototype manufacturing of the required devices, and testing of the whole system in practice, with focus on functionality and efficiency. Several hardware devices were designed and manufactured, for which appropriate controlling software was implemented. The implemented software architecture enables users to control the system using a graphical user interface, and allows for an easy extension of the system. The graphical user interface, which is accessible both locally through a touchscreen and remotely using a web application, enables users to easily configure connected devices and regulated zones, and to set temperature level in the defined zones variably depending on a week day and time. The user interface also provides statistics about the heating system. The implemented automated heating regulation system was successfully tested in real conditions of a flat in a historical building. The system can be extended both hardware-wise and software-wise.

The following work deals with basics of fiber optics, history of fiber optics, and methods of measuring physical quantities with the use of fiber optic sensors. The work includes facts about physics, chemistry and biology - these elements are necessary for a full understanding of the issue. In order to create an optical fiber temperature sensor based on Fabry Perot resonator principle, several methods of manufacturing the optical cavity are investigated. A practical part of paper consist in the manufacturing of the miniature fiber thermometer, its coating and testing.

This work deals with design of temperature measurement on heat pump test-room. Discusses diferent various variants of thermometers and their placements in measurement circuit. It contains sample software for control and processing of measured data on the test-room, which is controlled by the computer and built-in data acquisition card.

In this project, the temperature of water was to be determined by recording the sound made whilst being poured into a container. The goal was set to achieve an accuracy of at least 80% of measurements should be predicted within ±10°C and a negligible amount outside ±20°C. The approach to this problem was through creating an algorithm based on signal analysis and machine learning, which required a large quantity of audio samples to train. This algorithm would then be put into an application for added versatility. The resulting algorithm was able to make a prediction of 78.4% of measurements within ± 10°C and the ± 20°C interval contained all but 5.4%  of the measurements. The app did not work as intended on mobile devices but is functional on a computer. Although the computer version is functional and can predict temperatures, it is not accurate enough to be useful in day to day life.

No description available.

The aim of this thesis is to deal with teaching of negative numbers in mathematics in lower primary school. The thesis brings an overview of exercises related to negative numbers, which are available in textbooks dedicated to lower and upper primary school. Main part of the thesis is devoted to three different experiments - pupils experiment, teaching experiment and parlour game. The pupils experiment analysis the successes and troubles of pupils attending 4th and 5th class when filling out the worksheets focused on various models of negative numbers. Furthermore, the teaching experiment based on a questionnaire survey describes comments of lower and upper primary school teachers in regards to implementation and usefulness of negative numbers. Parlour game experiment demonstrates the ability of pupils to grasp mathematical phenomenon by playing a game. Key words: ­ additive operations with negative numbers ­ experiment ­ models of negative number: thermometer, floor, surface ­ environment Stepping ­ environment Stairs ­ word problems ­ board game ­ negative numbers

Submitted by Andrea Pereira (andrea.pereira@unipampa.edu.br) on 2017-03-13T17:30:03Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao_Adriane_Hirdes.pdf: 3848000 bytes, checksum: 348043b553a30ed8d618cbdbf91a99d3 (MD5) / Approved for entry into archive by Andrea Pereira (andrea.pereira@unipampa.edu.br) on 2017-03-13T17:30:23Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao_Adriane_Hirdes.pdf: 3848000 bytes, checksum: 348043b553a30ed8d618cbdbf91a99d3 (MD5) / Made available in DSpace on 2017-03-13T17:30:23Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Dissertacao_Adriane_Hirdes.pdf: 3848000 bytes, checksum: 348043b553a30ed8d618cbdbf91a99d3 (MD5) Previous issue date: 2015-07-24 / Este estudo se insere no âmbito do ensino superior de química por meio do laboratório investigativo com o uso de projetos abertos de equipamentos para aquisição automática de dados. O estudo tem como objetivo projetar, construir e avaliar um instrumento de medida de temperatura com aquisição automática de dados utilizando um transdutor do tipo termistor e sua aplicação em atividades experimentais investigativas de físicoquímica. O estudo teve como objetivos o projeto, desenvolvimento e avaliação de um termômetro eletrônico com termistor para aquisição automática de dados de temperatura em tempo real, e o seu uso em atividades práticas experimentais. O projeto do termômetro eletrônico incluiu um transdutor de temperatura do tipo termistor, um circuito de condicionamento de sinal, a plataforma Arduino e uma planilha para o Excel que permite apresentar os dados numéricos e atualizar a representação gráfica em tempo real da temperatura em função do tempo. Os resultados obtidos indicam que o termômetro construído apresentou erro de medição de 0,07 oC na faixa de -10 oC a 100 oC. Esse instrumento foi utilizado como recurso para viabilizar o planejamento e implementação de práticas experimentais investigativas de físico-química experimental. As atividades envolveram a determinação de entalpia de reação de decomposição do peróxido de hidrogênio e o levantamento da curva de resfriamento do ácido esteárico (atividade de termometria). A organização da atividade experimental de termometria seguiu o modelo de argumentação de Lawson, e foi elaborado em três momentos: predição, experimentação e verificação. Nessa atividade, o momento da experimentação seguiu o modelo de laboratório aberto. Os objetivos de aprendizagem das atividades foram organizados em níveis de cognição de acordo com a Taxonomia de Bloom revisada de Objetivos Educacionais. A implementação ocorreu com uma turma de acadêmicos de Físico-Química Experimental I no 1o semestre de 2015, nos meses de março e abril, de uma universidade pública do interior do estado do Rio Grande do Sul. Os instrumentos de coleta de dados foram guias de atividades práticas experimentais utilizados pelos participantes durante a implementação das atividades, um teste de conhecimentos de múltipla escolha e um teste de motivação para aprender, aplicados antes e após a implementação, e as observações da professora pesquisadora. O teste de conhecimento foi analisado avaliando sua fidedignidade e índices de dificuldade e discriminação de cada item. Testes de hipóteses não-paramétricos de Wilcoxon pareado unilateral indicam uma melhoria no desempenho dos participantes no teste de conhecimento (valor-p=0,009) e no teste de motivação para aprender (valor-p=0,006). A análise das respostas dos participantes aos guias de atividades envolveu a categorização dos itens dos guias em níveis de cognição proposto por Zoller. Itens com nível LOCS de desenvolvimento cognitivo foi contemplado por grande parte dos participantes, enquanto o nível HOCS, relacionado ao desenvolvimento de hipóteses, não foi atingido por qualquer participante. O protótipo do termômetro eletrônico com aquisição de dados e as atividades experimentais de termometria e calorimetria constituem produtos educacionais resultantes do presente estudo, e poderão ser utilizados e/ou modificados para atender às necessidades do planejamento didático do professor. / This study falls within the scope of undergraduate chemistry teaching through inquirybased laboratory using open projects of automatic data acquisition systems. This work studied a thermistor-based temperature-measuring instrument with automatic data acquisition and applications in investigative experimental activities in physical chemistry. The study aimed to the design, development and evaluation of an electronic thermometer with thermistor for automatic acquisition of temperature data in real time and its use in experimental practice activities. The project of the electronic thermometer includes a thermistor type temperature transducer, a signal conditioning circuit, an Arduino platform and an Excel spreadsheet for real-time data representation of temperature versus time data. The results indicate that the thermometer built has a measurement uncertainty of 0,07 °C in the range of -10 °C to 100 °C. This instrument was used as a resource to facilitate the planning and implementation of investigative experimental practices of experimental physical chemistry. The activities involved the determination of enthalpy of decomposition of hydrogen peroxide and the cooling curve of stearic acid (thermometry activity). The organization of thermometry experimental activity followed the pattern of Lawson's argumentation, and was developed in three phases: prediction, experimentation and verification. The experimentation phase followed the open laboratory model. The learning objectives of the activities were organized in cognition levels in accordance with the Revised Bloom's Taxonomy of Educational Objectives. The implementation took place with a group of Experimental Physical Chemistry I students in the first semester of 2015, in March and April, at a public university in the state of Rio Grande do Sul. The data collection instruments were the guides for experimental practical activities used by the participants during the implementation of activities, a multiplechoice test of knowledge and a test for motivation to learn, applied before and after implementation, and the observations of teacher researcher. The knowledge test was analyzed evaluating their reliability and levels of difficulty and discrimination of each item. Non-parametric Wilcoxon signed-rank tests indicate an improvement in the performance of participants for knowledge test (p-value=0,009) and motivation to learn (pvalue = 0,006). The analyses of participants’ responses to activity guides were carried out categorizing items of the guides in cognitive levels proposed by Zoller. Items with cognitive development LOCS level was reached by most of the participants, while the HOCS level, related to the development of hypotheses, was not reached by any participant. The prototype of the electronic thermometer with data acquisition and the experimental activities of thermometry and calorimetry are educational products resulting from this study, and may be used and/or modified to meet the needs of the didactic planning of the chemistry teacher.

Ce travail de thèse présente un dispositif expérimental original permettant la mesure, dans des conditions comparables, des fluctuations de l'aimantation d'un échantillon et de sa réponse à un champ magnétique. Une comparaison quantitative permet, via le théorème de fluctuation-dissipation, une mesure absolue de la température lorsque l'échantillon est à l'équilibre thermodynamique. Pour des systèmes vitreux, la "température effective" ---une extension conservant le formalisme du théorème de fluctuation-dissipation de la température pour les système à faible production d'entropie--- est rendue accessible. Un échantillon "verre de spin" ($CdCr_{1,7}In_{0,3}S_4$) aux propriétés vitreuses étudiées depuis de nombreuses années a permis cette mesure. Le régime fortement vieillissant, non-stationnaire, est étudié; la mesure nécessaire des fluctuations thermiques est très délicates (l'amplitude de ces fluctuations correspond à la réponse de l'échantillon à des variations de l'ordre du millionième du champ magnétique terrestre). <br> Les résultats obtenus montrent en premier lieu une dynamique de quasi-équilibre, confirmant des résultats précédents. Le régime fortement vieillissant est maintenant également atteint. Toutefois, les mesures ne peuvent pas être traduites directement en terme de température effective, car expérimentalement, on observe systématiquement la coexistence d'une dynamique stationnaire et de la dynamique de vieillissement. Une analyse par scaling est proposée pour séparer ces deux contributions. Sous réserve de validité de cette analyse, les mesures confirment alors les principales caractéristiques attendues pour la température effective, et notamment son indépendance en fonction de l'âge du système. <br> Les différents modèles connus ne permettent cependant pas d'expliquer complètement toutes les caractéristiques de la température effective mesurée, certaines d'entre elles paraissant encore antinomiques...

Made available in DSpace on 2016-06-02T20:02:52Z (GMT). No. of bitstreams: 1 5334.pdf: 3516383 bytes, checksum: dca9ee6352a05bbb2d7b0b74a40b05d9 (MD5) Previous issue date: 2012-05-30 / The excessive appreciation of the mathematical formalism and the lack of contextualization of the content has contributed to many students, especially in high school, to feel animosity to Physics and consequently having low records in this discipline. Defended by many researchers and teachers of Physics, the experimental activity consists of an interesting didactic resource to change this situation. However, it is not frequently used in classroom and when it is applied, in general, becomes inserted in a traditional proposal of teaching, using strictly structured guide that serves only for the illustration of the theory, verification of a law or observation of a phenomenon. As a suggested alternative for this situation we have developed a teaching strategy, grounded in Vigotski's social interaction theory and investigative methodology, which is currently defended by several researchers in the field of Science Education and explores the experimental activity in a flexible way under an investigative perspective. It consists of five parts: i. Contextualization; ii. Instigation; iii. Planning; iv. Accomplishment and v. Ending. The proposal has been applied in a high school classroom in a public school of a night class, as part of our teaching activities. To this end, we choose an experiment, commonly found in many Physics textbooks, which is the construction of a rudimentary liquid column thermometer. This experiment allowed us to explore several concepts related to Thermal Physics such as temperature, thermal equilibrium, expansion and thermal conductivity, calibration of thermometers, both analytically and qualitatively. Considering the context in which this proposal was applied, despite many adversities, we can consider that the work achieved its goal in a satisfactory way, especially concerning to the greater involvement of students in the study of Physics. Attached to this work follows a manual in which we discuss some strategies for realization of experimental activities, pointing out the advantages and disadvantages of each one. Additionally we emphasize the proposal based on the physical investigation in order to exploit the phenomenon in a more interesting and meaningful way. / A valorização excessiva do formalismo matemático e a falta de contextualização do conteúdo têm contribuído para que muitos estudantes, principalmente do Ensino Médio, sintam animosidade à Física e, consequentemente, apresentem baixo rendimento nessa disciplina. Defendida por muitos pesquisadores e professores do Ensino de Física, a atividade experimental consiste num recurso didático interessante para mudar essa realidade. Contudo, ainda é pouco utilizada em sala de aula e, em geral, acaba sendo inserida dentro de uma proposta tradicional de ensino, fazendo uso de roteiros fortemente estruturados e servindo apenas para ilustração da teoria, verificação de uma lei ou observação de um fenômeno. Como sugestão de alternativa para essa situação, desenvolvemos uma estratégia de ensino, fundamentada na teoria sociointeracionista de Vigotski e na metodologia investigativa. Esta última é atualmente defendida por pesquisadores do Ensino de Ciências, pois explora a atividade experimental de forma mais aberta, numa perspectiva investigativa. Constituída por cinco momentos: i. Contextualização; ii. Provocação; iii. Planejamento; iv. Realização e v. Fechamento, a nossa proposta foi realizada numa sala de aula do Ensino Médio da rede pública estadual do período noturno, como parte de nossas atividades docentes. Escolhemos um experimento, comumente encontrado em diversos livros didáticos de Física: a construção de um termômetro de coluna líquida com materiais caseiros. Com ele, foi possível explorar vários conceitos de Física Térmica como temperatura, equilíbrio térmico, dilatação e condutividade térmica, calibração de termômetros, tanto analiticamente quanto qualitativamente. Levando em conta o contexto em que esta proposta foi aplicada, envolto por tantas situações adversas da escola pública, consideramos que o trabalho alcançou bons resultados, principalmente no que concerne ao maior envolvimento dos alunos com o estudo da Física. Como anexo a este trabalho segue um roteiro no qual são discutidas algumas estratégias para a realização de atividades experimentais, apontando as vantagens e desvantagens de cada uma delas, com ênfase na investigação como uma abordagem que visa explorar esse recurso didático de maneira mais interessante e significativa para os estudantes.

The issue this master’s thesis discusses the cooling synchronous machines. Specifically, the calculation of cooling induction motor using the finite volume method. Using Autodesk Inventor will create a 3D model of a real electric machine, ie asynchronous motor and then ANSYS WORKBENCH perform system analysis CFX, based on the finite volume method. Furthermore, we realize the air speed measurements on a particular machine and the individual results obtained by measuring and calculating the actual compared with each other. The master’s thesis also deals marginally with closely related to it. For the same machine model, we apply the calculation of the temperature fields using the finite volume method and them perform a thermal analysis. Next, we can carry out the measurement of the temperature on the motor itself and calculate the measured values and the measured compare each other.