No description available.

We present a catalog of the neutral atomic hydrogen structures (H I holes) and the analysis of their properties in nearby (≤ 10.3 Mpc) gas-rich dwarf galaxies of the LITTLE THINGS (Local Irregulars That Trace Luminosity Extremes, The H I Nearby Galaxy Survey) group. We used high sensitivity (≤ 1.1 mJy beam-1 channel-1), high velocity resolution (1.3 km s-1 to 2.6 km s-1) and high linear resolution (average ~110 pc; angular resolution ~6”) H I data of 37 dwarf irregulars and four blue compact dwarf galaxies. We cataloged H I holes in the entire sample and studied the of the properties of holes. We also investigated the effect of H I porosity on star formation, and the correlation of the star formation rate (SFR) calculated from H I holes with standard star formation tracers Hα and FUV. We detected 306 H I holes in LITTLE THINGS galaxies. We confirmed 22 kpc-sized holes, the largest and the smallest hole diameters are about 2.3 kpc and 38 pc (resolution limit) respectively. The expansion velocities of the holes range from 5 km s-1 (upper limit) to 30 km s-1, and the rotational velocities range from 6 km s-1 to 77 km s-1. The H I disk radii of the galaxies range from about 0.5 kpc to 6.7 kpc. The kinetic ages of the holes range from about 1 to 127 Myr, and the estimated scale heights are varying from 61 pc to 653 pc. The percentage distribution of the holes outside and inside the V-band break radius is nearly uniform, 49% and 51% respectively. In LITTLE THINGS galaxies, we found no obvious correlation between the surface and volume porosities, and SFR. However, two highest and two lowest porosity galaxies have no star formation at present. The holes are consistent with the SFR estimated from the energy required to create a hole and the star formation rates measured from Hα and FUV, indicating that the holes are consistent with a star formation origin.

Notre habilité à interagir avec les objets du monde nécessite l’intégration d’informations provenant de différents canaux sensoriels, dans le cadre de la construction d’une représentation de l’espace en particulier des informations visuelles et tactiles. L’espace péri personnel et l’intégration visuo-tactile ont été l’objet d’importantes recherche récemment. Des études neuro physiologiques chez le primate non-humain ont montré l’existence de neurones bi modaux activés à la fois par des stimulations tactiles et par des stimulations visuelles si ces dernières étaient présentées près d’une partie du corps (par exemple la main). Il a été proposé que ces neurones bi-modaux constituent le substrat neuronal de la représentation de l’espace péri personnel. Les études neuropsychologiques menées chez des patients présentant une extinction cross-modale consécutive à une lésion pariétale droite ont permis de suggérer l’existence du même type de représentation de l’espace péri personnel chez l’homme. Les données issues des études en neuro imagerie fonctionnelle sont venues par la suite conforter cette idée. Plus récemment, à travers l’utilisation d’outils, des données acquises chez le primate humain et non humain ont révélé les propriétés dynamiques de cette représentation spatiale. Selon notre hypothèse la représentation de l’espace péri personnel est une interface présidant aux interactions du corps avec les objets du monde externe. Nous avons donc évalué le rôle et l’état de l’espace péri personnel lors de l’exécution de mouvements volontaires vers des objets (comme une simple saisie) et lors de mouvements involontaires d’évitement. Lors d’une première série d’expériences nous avons étudié les coordonnées spatiales du codage des objets qui soudainement se rapprochent du corps grâce à la mesure des potentiels évoqués moteurs. Cette étude a révélé que l’espace péri personnel joue un rôle dans la représentation des objets approchant le corps et dans la sélection des mouvements appropriés en réponse. Lors d’une seconde série d’expériences nous avons utilisé un paradigme d’interférence visuo-tactile couplé à l’enregistrement cinématique des mouvements de saisie afin d’examiner la représentation de l’espace péri personnel lors de 1 l’exécution d’actions volontaires. Cette approche novatrice nous a permis de mettre en évidence que l’action volontaire induit un recodage en ligne de l’interaction visuo-tactile dans l’espace de préhension. Ce recodage de l’action s’effectue en coordonnées centrées sur la partie du corps qui exécute l’action. En conclusion nos études expérimentales démontrent que l’espace péri personnel est une interface multi sensorielle qui a été sélectionnée à travers l’évolution non seulement pour la gestion des mouvements d’évitement et de défense mais également pour l’exécution d’actions volontaires. / Our ability to interact with the environment requires the integration of multisensory information for the construction of spatial representations. The peripersonal space (i.e., the sector of space closely surrounding one’s body) and the integrative processes between visual and tactile inputs originating from this sector of space have been at the center of recent years investigations. Neurophysiological studies provided evidence for the presence in the monkey brain of bimodal neurons, which are activated by tactile as well as visual information delivered near to a specific body part (e.g., the hand). Neuropsychological studies on right brain-damaged patients who present extinction and functional neuroimaging findings suggest the presence of similar bimodal systems in the human brain. Studies on the effects of tool-use on visual-tactile interaction revealed similar dynamic properties of the peripersonal space in monkeys and humans. The functional role of the multisensory coding of peripersonal space is, in our hypothesis, that of providing the brain with a sensori-motor interface for body-objects interactions. Thus, not only it could be involved in driving involuntary defensive movements in response to objects approaching the body, but could be also dynamically maintained and updated as a function of manual voluntary actions performed towards objects in the reaching space. We tested the hypothesis of an involvement of peripersonal space in executing both voluntary and defensive actions. To these aims, we joined a well known cross-modal congruency effect between visual and tactile information to a kinematic approach to demonstrate that voluntary grasping actions induce an on-line re-weighting of multisensory interactions in the peripersonal space. We additionally show that this modulation is handcentred. We also used a motor evoked potentials approach to investigate which coordinates system is used to code the peripersonal space during motor preparation if real objects rapidly approach the body. Our findings provide direct evidence for automatic hand-centred coding of visual space and suggest that peripersonal space may also serve to represent rapidly 3 approaching and potentially noxious objects, thus enabling the rapid selection of appropriate motor responses. These results clearly show that peripersonal space is a multisensori-motor interface that might have been selected through evolution for optimising the interactions between the body and the objects in the external world.

Submitted by Nadir Basilio (nadirsb@uninove.br) on 2016-05-25T15:44:32Z No. of bitstreams: 1 Nayra Deise dos Anjos Rabelo.pdf: 1274728 bytes, checksum: 2fb87109dfbed0d375542469df6e6186 (MD5) / Made available in DSpace on 2016-05-25T15:44:32Z (GMT). No. of bitstreams: 1 Nayra Deise dos Anjos Rabelo.pdf: 1274728 bytes, checksum: 2fb87109dfbed0d375542469df6e6186 (MD5) Previous issue date: 2014-12-04 / Patellofemoral pain syndrome (PFPS) is a common complaint, especially in women. The hip muscles strengthening is an effective technique for the treatment of this disorder. In addition, the neuromuscular training has received attention as a therapeutic tool, but results in individuals with PFPS are still very evident and inconclusive. Therefore, the aim of this study was to compare the effects of a neuromuscular training program of the trunk and lower limbs associated with the hip and knee muscles strengthening in women with PFPS with a program that involves the isolated strengthening of those muscles. Thirty-four women aged 18 to 35 years with a clinical diagnosis of PFPS were randomized into two groups: Strengthening Group (SG) and Neuromuscular Group (NMG). Patients underwent 12 sessions of the strengthening (Knee extensors, hip abductor and hip external rotator) and the NMG, associated with this, received the balance, coordination and control of the lower limb training. Because of the nature of the study, we chose to report now, only the results of force and kinematics, since the clinical analysis is still in progress. Thus, the effects of treatment on muscle strength and kinematics were calculated using paired t test for parametric measures and the Friedman test with post hoc, for nonparametric measures. At the end of 4 weeks of treatment, significantly increased the strength of the hip abductor muscles (percentage of improvement from 20.7% to 19% for SG and NMG), hip external rotators (percentage of improvement of 18.2% was observed for SG and 17% for NMG) and knee extensors (percentage of improvement from 19.7% to 16.2% for SG and NMG) in both groups, and effectively reduce the range of motion of hip adduction in the voluntary NMG. We conclude that both programs proposed treatment promoted increased strength of the muscles evaluated, but only the associated neuromuscular training to strength training was able to effectively create change in kinematics, real improvement in hip adduction. / A síndrome da dor femoropatelar (SDFP) é uma queixa comum, sobretudo em mulheres. O fortalecimento dos músculos do quadril é uma técnica eficaz para o tratamento dessa disfunção. Além disso, o treino neuromuscular vem recebendo destaque como ferramenta terapeutica, porém seus resultados em indivíduos com SDFP ainda são pouco evidentes e inconclusivos. Sendo assim, o objetivo desse estudo foi comparar os efeitos de um programa de treinamento neuromuscular do tronco e membros inferiores associado ao fortalecimento dos músculos do quadril e joelho de mulheres com SDFP com um programa que envolve o fortalecimento isolado desses mesmos músculos. Trinta e quarto mulheres, entre 18 e 35 anos, com diagnóstico clínico de SDFP, foram aleatorizadas em dois grupos: Grupo Fortalecimento (GF) e Grupo Neuromuscular (GNM). As pacientes foram submetidas a 12 sessões de fortalecimento da musculatura extensora do joelho e abdutora e rotadora lateral do quadril e o GNM, associado a isso, recebeu treinamento de equilíbrio, coordenação e controle do membro inferior. Por conta da natureza do estudo, optamos por reportar, nesse momento, apenas os resultados de força e cinemática, uma vez que a análise clínica ainda está em andamento. Sendo assim, os efeitos dos tratamentos foram calculados através de test t pareado para medidas paramétricas e teste de Friedman com post hoc, para medidas não paramétricas. Ao final das 4 semanas de tratamento foi observado aumento significante de força dos músculos abdutores (porcentagem de melhora de 20,7% para GF e 19% para GNM) e rotadores laterais (porcentagem de melhora de 18,2% para GF e 17% para GNM) do quadril e extensores do joelho (porcentagem de melhora de 19,7% para GF e 16,2% para GNM), em ambos os grupos, além de redução efetiva da amplitude de movimento da adução do quadril nas voluntárias do GNM. Concluímos que ambos os programas de tratamento propostos promoveram ganho de força da musculatura avaliada, mas apenas o treinamento neuromuscular associado ao treino de força foi capaz de, efetivamente, gerar mudança na cinemática, com melhora real da adução do quadril.

Submitted by Nadir Basilio (nadirsb@uninove.br) on 2018-06-19T15:32:34Z No. of bitstreams: 1 Marcelo Martins Kalytczak.pdf: 1158535 bytes, checksum: f15bfe6500b5bf9b6773583072c1ddf7 (MD5) / Made available in DSpace on 2018-06-19T15:32:34Z (GMT). No. of bitstreams: 1 Marcelo Martins Kalytczak.pdf: 1158535 bytes, checksum: f15bfe6500b5bf9b6773583072c1ddf7 (MD5) Previous issue date: 2015-12-14 / Delays in pre-activation or deficiencies in the activity of the dynamic muscle stabilizers of the knee and hip joints are the most common causes of the Patellofemoral pain syndrome (PFPS). The aim of the study was to compare kinematic variables and electromyographic activity of the vastus lateralis, biceps femoris, gluteus maximus and gluteus medius muscles between patients with PFPS and health subjects during the single leg triple hop test (SLTHT). This cross-sectional study included 14 female (23.50 ± 2.02 years) with PFPS (PFPS group) and 14 female healthy (23.14 ± 3.35 years) with no history of knee pain (Healthy group). Kinematic and EMG data were collected through participants performed a single session of the SLTHT. The PFPS group exhibited a significant increase (p < 0.05) in the EMG activity of the biceps femoris and vastus lateralis muscles, when compared with the healthy group. This same result was also found for the vastus lateralis muscle (p <0.05) when analyzing the EMG activity during the eccentric phase (EXC-iEMG) of the stance phase. No significant difference was found in time activity of peak in any of the analyzed muscles, but in GSDFP was observed anticipation of the vastus lateralis muscle that changed the activity order in relation to the CG. In kinematic analysis, no significant differences were found between the groups. In tasks that involve a high neuromuscular control such as the single leg triple hop test, the muscles that act directly on the knee joint (biceps femoris and vastus lateralis) are more active among women with patellofemoral pain syndrome than among healthy women. These differences were not observed for the muscles that act on the hip (gluteus maximus and gluteus medius), as in previous studies. / Atrasos na pré-ativação ou deficiências na atividade dos músculos estabilizadores dinâmicos das articulações do joelho e quadril são considerados como possíveis causas da síndrome da dor femoropatelar (SDFP). O objetivo desse estudo foi comparar variáveis cinemáticas e atividade eletromiográfica (EMG) dos músculos vasto lateral, bíceps femoral, glúteo máximo e glúteo médio entre indivíduos saudáveis e pacientes com SDFP durante a execução do single leg triple hop test (SLTHT). Participaram deste estudo transversal, 14 mulheres (idade 23,50 ± 2,02) com diagnóstico de dor anterior de joelho (GSDFP) e 14 mulheres saudáveis (idade 23,14 ± 3,35) sem histórico de dor no joelho (grupo controle – GC). Os dados da avaliação cinemática e EMG foram coletados das participantes durante uma única sessão de testes. As voluntárias do GSDFP demonstraram aumento estatisticamente significativo (p<0,05) na atividade EMG dos músculos bíceps femoral e vasto lateral durante a pré-ativação e a fase de apoio, quando comparado com as mulheres do GC. Este mesmo resultado também foi encontrado para o músculo vasto lateral (p<0,05) quando analisada somente a contração excêntrica da fase de apoio. Não houve diferença significativa no tempo do pico de atividade em nenhum dos músculos analisados, porém no GSDFP foi observada uma antecipação do músculo vasto lateral que alterou a ordem de atividade em relação ao GC. Na análise cinemática não foi encontrada diferença significativa para o ângulo de flexão de quadril e joelho entre os grupos. De acordo com os resultados observados, em atividades intensas e que envolvem alta exigência do controle neuromuscular como o SLTHT, os músculos que estabilizam a articulação do joelho (vasto lateral e bíceps femoral) são mais ativos entre as mulheres com SDFP em comparação com mulheres saudáveis. Estas diferenças não foram observadas nos músculos que atuam na estabilização da articulação do quadril (glúteo máximo e médio), conforme já verificado em estudos anteriores.

Submitted by Nadir Basilio (nadirsb@uninove.br) on 2018-07-23T18:20:19Z No. of bitstreams: 1 Diogo Henrique Magalhães Gonçalves.pdf: 1521507 bytes, checksum: 0d42f8a3b94345ef905deb7a85a90628 (MD5) / Made available in DSpace on 2018-07-23T18:20:19Z (GMT). No. of bitstreams: 1 Diogo Henrique Magalhães Gonçalves.pdf: 1521507 bytes, checksum: 0d42f8a3b94345ef905deb7a85a90628 (MD5) Previous issue date: 2016-12-07 / The reproducibility of scapular kinematics has already been tested intra- and inter-sessions and intra- and inter-days, however, these evaluations were only performed by experienced evaluators and the majority of studies included only one evaluator. Thus, the comparison between evaluators with different levels of experience has not yet been explored, leaving doubts as to the accuracy of the evaluation results when performed by different evaluators. The objective of the present study was to evaluate the reproducibility inter and intra-rater, experienced and inexperienced, during flexion and abduction movements of the arm for the scapula, humerus, and trunk segments. Kinematic data were captured during flexion and abduction movements of the arm using a system of 8 cameras and a sampling frequency of 120 Hz. In total, twenty healthy volunteers were evaluated (10 men and 10 women), with an average age of 25.1 (1.1) years, who underwent 6 sessions of movement analysis. Each evaluator carried out three sessions, two sessions on the first day, with a three-hour interval between them, and the third session on the second day, twenty-four hours after the first day. For each session, 5 repetitions of each movement, unilateral abduction and flexion of the arm, were performed. Statistical analysis was performed by an independent evaluator and the Shapiro-Wilk test was used for data distribution. The reproducibility of the range of motion and angular values at angles of 30º, 60º, 90º, and 120º was verified through the intraclass correlation coefficient (ICC) and standard measurement error (SEM). The values obtained for the angles 30°, 60°, 90°, and 120° intra-day ranged from 0.67-0.98 and (0.58° to 5.64°) for the inexperienced evaluator and from 0.67° to 0.98° and (0.64° to 6.17°) for the experienced evaluator in the flexion movement. During the abduction movement the values obtained at angles of 30°, 60°, 90°, and 120° intra-day ranged from 0.75° to 0.96° and (0.51° to 4.93°) for the inexperienced evaluator and from 0.62° to 0.97° and (0.66° to 6.58°) for the experienced evaluator. The model presented good to excellent intra-day reproducibility for both evaluators in the flexion and abduction movements of the arm. Inter-day values in flexion varied from 0.41° to 0.88° and (0.64° to 6.17°) for the inexperienced evaluator and 0.72° to 0.95° and (0.67° to 4.31°) for the experienced evaluator. In the inter-day abduction movement, values ranged from 0.33° to 0.91° and (0.74° to 6.60°) for the inexperienced evaluator and 0.72° to 0.98° and (0.73° to 5.01°) for the experienced evaluator. The reproducibility of the inexperienced evaluator presented from weak to excellent in the arm flexion movement and poor to excellent in abduction of the arm. The reproducibility for the experienced evaluator was good to excellent for flexion and abduction of the arm between the scapula, humerus, and trunk segments in healthy adults. The results showed that there is no difference between evaluators in the intra-day evaluations; however, on an inter-day basis the experienced evaluator obtained better reproducibility results, demonstrating that a difference in levels of experience between evaluators is of fundamental importance to obtain reproducible results on different days. However, we emphasize the importance of performing further studies, with different movements and patients, performed by two or more evaluators. / A reprodutibilidade da cinemática escapular já foi testada intra e inter-sessões e intra e inter-dias, porém essas avaliações foram realizadas apenas por avaliadores experientes e a maioria dos estudos com apenas um avaliador. A comparação entre avaliadores com diferentes níveis de experiência ainda não foi explorada, deixando dúvidas quanto a precisão dos resultados da avaliação se realizadas por diferentes avaliadores. O objetivo do presente estudo foi avaliar a reprodutibilidade inter e intra-avaliadores, com diferentes níveis de experiência, nos movimentos de flexão e abdução do braço para os segmentos da escápula, úmero e tronco. As capturas dos dados de cinemática foram realizadas utilizando um sistema de 8 câmeras e frequência de amostragem de 120Hz durante os movimentos de flexão e abdução do braço. Foram avaliados 20 voluntários saudáveis (10 homens e 10 mulheres) com idade média de 25.1 (±1.1) anos, que foram submetidos à 6 sessões de análise do movimento. Cada avaliador realizou três sessões, duas sessões realizadas no primeiro dia com intervalo de três horas entre elas e a terceira sessão foi realizada no segundo dia, 48 horas após o primeiro dia. Para cada sessão foram realizadas 5 repetições de cada movimento, abdução e flexão unilateral do braço. A análise estatística foi realizada por um avaliador independente, para distribuição dos dados, foi utilizado o teste de Shapiro-Wilk, A reprodutibilidade da amplitude de movimento e dos valores angulares nos ângulos de 30º, 60º, 90º e 120º do braço foi verificada pelo coeficiente de correlação intraclasse (ICC) assim como o erro de medida padrão (SEM). Os valores obtidos nos ângulos de 30°, 60°, 90° e 120° intra-dia variaram de 0,67-0,98 e (0,58° à 5,64°) para o avaliador inexperiente e variaram de 0,67-0,98 e (0,64° à 6,17°) para o avaliador experiente, no movimento de flexão. Durante o movimento de abdução os valores obtidos nos ângulos de 30°, 60°, 90° e 120° intra-dia variaram de 0,75-0,96 e (0,51° à 4,93°) para o avaliador inexperiente e variaram de 0,62-0,97 e (0,66° à 6,58°) para o avaliador experiente. O modelo apresentou de boa a excelente reprodutibilidade, intra-dia para ambos os avaliadores nos movimentos de flexão e abdução do braço. Os valores obtidos inter-dias na flexão variaram de 0,41 a 0,88 e (0,64° a 6,17) para o avaliador inexperiente e de 0,72 a 0,95 e (0,67° a 4,31°) para o avaliador experiente. No movimento de abdução inter-dias os valores variaram de 0,33 a 0,91 e (0,74° a 6,60°) para o avaliador inexperiente e de 0,72 a 0,98 e (0,73° a 5,01°) para o avaliador experiente. Apresentando a reprodutibilidade do avaliador inexperiente de fraca a excelente no movimento de flexão do braço e pobre a excelente na abdução do braço. A reprodutibilidade para o avaliador experiente foi de boa a excelente para a flexão e abdução do braço entre os segmentos da escápula, úmero e tronco em adultos saudáveis. Mostrando que não há diferença entre avaliadores nas avaliações intra-dia, porém inter-dias o avaliador experiente obteve melhores resultados de reprodutibilidade, mostrando que a diferença de níveis de experiência entre os avaliadores é de fundamental importância para se ter resultados reprodutíveis em diferentes dias. Entretanto devemos ressaltar a importância de mais estudos serem realizados, com diferentes movimentos e pacientes, realizados por dois ou mais avaliadores.

The field of robotics is becoming increasingly more important and consequently, students need better tools to gain knowledge and experience with them. The University of Skövde was interested in developing a learning tool focused on a virtual simulation of mobile robots. Despite the fact that there are several programmes to create this tool, MATLAB was preferable because of its strong presence in educational institutions. The objectives were oriented towards testing different robot kinematics in an adjustable virtual 3D environment. Moreover, the simulation needed a part in which future users could design own algorithms in order to control the AGVs. Therefore, sensors such as LIDAR sensors were necessary to enable a possible interaction between the robot and the scenario created. This project was developed with a previous study and a comparison of some MATLAB projects and tools. After that, the scenario and the simulation were produced. As a result, a virtual simulation has been created emphasising that the user could modify and adapt multiple parameters such as the size of the AGV, the form of the virtual environment or the selection of forward or inverse kinematics in order to develop different types of algorithms. Other features can be adjusted manually such as the type or number of sensors as well as SLAM conditions. Finally, this thesis was conducted to give a basis about mobile robots and to be a first step for operating with real robots. The simulation also provides an easy to use interface in which students can keep working in it through the introduction of new applications related to image processing or more sophisticated algorithms and controllers.

[ES] El hombro es una articulación compleja en la que interaccionan múltiples estructuras, lo que permite la realización de movimientos de gran amplitud. Debido a esta característica, puede ser fácilmente alterada si alguno de los componentes falla. Las patologías del hombro son variadas, así como diversa es la sintomatología y el nivel de alteración funcional. El grado de afectación funcional puede ser valorado ya sea mediante escalas clínicas, o con pruebas biomecánicas basadas en el análisis cinemático, que añaden objetividad a los resultados. No obstante, los modelos cinemáticos disponibles en la actualidad no ofrecen una representación realista del movimiento articular, lo que supone una importante limitación a la hora de desarrollar sistemas de valoración funcional. El objetivo principal de esta tesis fue describir el movimiento del hombro mediante técnicas cinemáticas avanzadas que incluyeran el uso de variables funcionales asociadas a la posición, velocidad y aceleración, así como la descripción de la trayectoria del eje instantáneo de rotación, con la finalidad de desarrollar un nuevo enfoque en las técnicas de valoración funcional del hombro. La muestra de estudio estuvo compuesta por 41 sujetos sanos y 15 sujetos con patología de hombro. Se analizaron los movimientos de abducción en el plano frontal y escapular, sin peso y con una maza de 1kg. Se utilizó la escala EVA (Escala Visual Analógica), para determinar el nivel de dolor percibido y la escala DASH (Disabilities of the arm, shoulder and hand), para definir el grado funcional. Se realizó un análisis de variables numéricas, variables funcionales, reproducibilidad y armonía del movimiento y descripción de la trayectoria del eje instantáneo de rotación (EIR). Como resultado, se ha demostrado la alta fiabilidad del procedimiento. Las diferencias encontradas entre los sujetos sanos y patológicos, solo eran evidentes a nivel de grupos, además la dispersión de la muestra era considerable. Los valores de reproducibilidad y armonía fueron similares para los dos grupos. En promedio, los sujetos patológicos tenían menor ángulo, velocidad y aceleración, pérdida que se producía de forma continua a lo largo del ciclo, como se observa en el análisis de las funciones del movimiento. Se encontró que la escala DASH guardaba una relación con las variables cinemáticas funcionales, si bien, era moderada. Por otra parte, al aumentar el nivel de afectación, se observaba una clara disminución de la velocidad angular, y un cambio en el patrón de movimiento. Con respecto al efecto de la carga, no se encontraron diferencias claras en la población de estudio. Finalmente, la trayectoria del EIR describía una ruta de inicio por debajo del acromion, seguido de un desplazamiento vertical y medio-lateral, con un patrón que aunque era similar entre los grupos, se veía afectado de forma diferente por el dolor o el nivel de afectación funcional en la muestra de patológicos. En conclusión, los resultados indican que las variables funcionales son más sensibles a los cambios que las variables numéricas clásicas basadas en rangos o valores máximos. Por otra parte, las diferencias encontradas entre los sujetos patológicos y los sanos, solo son claras a nivel de conjunto, pero no separan de forma nítida a los individuos de cada grupo, pudiendo ser solo evidentes en caso de afectaciones muy severas, pero no con niveles moderados o bajos. El estudio del EIR es novedoso y proporciona información acerca de la coordinación del movimiento, aspecto de especial relevancia dada la composición del complejo articular del hombro. Finalmente, de los resultados se extrae el interés del uso de medidas repetidas usando el sujeto como factor y utilizando las escalas de valoración funcional, ya que el uso solo de datos biomecánicos no parece ser suficiente. / [CAT] El muscle és una articulació complexa en la qual interaccionen múltiples estructures, la qual cosa permet la realització de moviments de gran amplitud. A causa d'aquesta característica, pot ser facilment alterada si algun dels components falla. Les patologies del muscle són variades, així com diversa és la simptomatologia i el nivell d'alteració funcional. El grau d'afectació funcional pot ser valorat ja siga mitjanvant escales clíniques, o amb proves biomecaniques basades en l'analisi cinematica, que afigen objectivitat als resultats. No obstant aixo, els models cinematics disponibles en l'actualitat no ofereixen una representació realista del moviment articular, la qual cosa suposa una important limitació a l'hora de desenvolupar sistemes de valoració funcional. L'objectiu principal d'aquesta tesi va ser descriure el moviment del muscle mitjanvant tecniques cinematiques avanvades que inclogueren l'ús de variables funcionals associades a la posició, velocitat i acceleració, així com la descripció de la trajectoria de l'eix instantani de rotació, amb la finalitat de desenvolupar un nou enfocament en les tecniques de valoració funcional del muscle. La mostra d'estudi va estar composta per 41 subjectes sans i 15 subjectes amb patología de muscle. Es van analitzar els moviments d'abducció en el pla frontal i en el pla escapular, amb pes d'1 quilogram i sense pes. Es va utilitzar l'escala EVA (escala visual analogica), per a determinar el nivell de dolor percebut i l'escala DASH (Disabilities of the arm, shoulder and hand), per a definir el grau funcional. Es va realitzar una analisi de variables numeriques, variables funcionals, reproducibilitat i harmonia del moviment i descripció de la trajectoria de l'eix instantani de rotació. Com a resultat, s'ha demostrat l'alta fiabilitat del procediment. Les diferencies oposades entre els subjectes sans i patologics, només eren evidents a nivell de grups, a més la dispersió de la mostra era considerable. Els valors de reproducibilitat i harmonia van ser similars per als dos grups. En mitjana, els subjectes patologics tenien menor angle, velocitat i acceleració, perdua que es produia de forma contínua al llarg del cicle, com s'observa en l'analisi de les funcions del moviment. Es va trobar que l'escala DASH guardava una relació con les variables cinematiques funcionals, si bé, era moderada. D'altra banda, en augmentar el nivell d'afectació, s'observava una clara disminució de la velocitat angular, i un canvi en el patró de moviment. Respecte a l'efecte de la carrega, no es van trobar diferencies clares en la població d'estudi. Finalment, la trajectoria del EIR descrivia una ruta d'inici per davall de l'acromi, seguit d'un desplavament vertical i mig-lateral, amb un patró que encara que era similar entre els grups, es veia afectat de forma diferent pel dolor o el nivell d'afectació funcional en la mostra de patologics. En conclusió, els resultats indiquen que les variables funcionals són més sensibles als canvis que les variables numeriques classiques basades en rangs o valors maxims. D'altra banda, les diferencies oposades entre els subjectes patologics i els sans, només són clares a nivell de conjunt, pero no separen de forma nítida als individus de cada grup, podent ser només evidents en cas d'afectacions molt severes, pero no amb nivells moderats o baixos. L'estudi del EIR és nou i proporciona informació sobre la coordinació del moviment, aspecte d'especial rellevancia donada la composició del complex articular del muscle. Finalment, dels resultats s'extrau l'interés de l'ús de mesures repetides usant el subjecte com a factor i utilitzant les escales de valoració funcional, ja que l'ús sol de dades biomecanics no sembla ser suficient. / [EN] The shoulder complex is a structure of joints with the largest range of motion. Consequently, it is susceptible to injury. Shoulder pathologies involve different levels of functional impairment that can be assessed either by clinical scales or by objective methods such as kinematic analysis. However, currently available kinematic models do not offer a realistic representation of joint movement, which is an important limitation when developing functional assessment systems. The main goal of current dissertation is to describe the movement of the shoulder, using advanced kinematic techniques that include the use of position, velocity and acceleration variables, as well as the use of the instantaneous helical axis, in order to develop new techniques of functional assessment. This study included 41 healthy subjects and 15 subjects with shoulder pathology. Subjects performed humeral elevation in 2 planes (frontal and scapular) and 2 conditions (loaded and unloaded). The VAS (visual analog scale) was used to determine the level of perceived pain and the DASH scale (Disabilities of the arm, shoulder and hand) to define the functional impairment. An analysis of numerical variables, functional variables, reproducibility and harmony of the movement and description of the trajectory of the instantaneous helical axis (IHA) was carried out. As a result, the high reliability of the procedure has been demostrated. Significative differences were found between healthy and pathological subjects. However, it was only evident about groups, in addition the dispersion was considerable. Reproducibility and harmony values were similar for both. The functional analysis showed that the pathological group had lower angle, velocity and acceleration throughout the entire cycle. It was found that the DASH scale had a moderate relation with the functional kinematic variables. On the other hand, when increasing the level of affectation, an obvious decrease of the angular velocity, and a change in the movement pattern was observed. Regarding the effect of loading, no clear differences were found in the study population. Finally, the IHA described a vertical and mid-lateral displacement, with an initial point below the acromion. The pattern was similar in both groups, however it was affected by the level of pain and functional impairment. In conclusion, these findings suggest that functional variables are more sensitive to changes than classical numerical variables. On the other hand, differences between healthy and pathological subjects are only evident at group level. It seems that it is only evident in highly affected patients, not in those with a mild or intermediate impairment. Moreover, the study of the IHA is novel and provides relevant information about the shoulder joint coordination. Finally, we concluded that the use of repeated measurements using the subject as a factor along with the use of scales of functional assessment provides a better description of the movement since the exclusive use of biomechanical data, does not seem to be sufficient. / Cáceres Cáceres, ML. (2019). Aplicación de la cinemática articular a la valoración funcional del hombro [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/133994 / TESIS

This master’s thesis familiarizes reader with technology of machine grinding – it’s history, principle, general use, related tools, achievable parameters and kinematics of grinding process. The core of work is analysis of jig-grinder Hauser H45-400, it’s kinematics, machine technical data, options and accessories. Work concludes with technical and economical assessment of machining of several parts with this machine and compares results to alternative options of machining.

The tensor theory is a branch of Multilinear Algebra that describes the relationship between sets of algebraic objects related to a vector space. Tensor theory together with tensor analysis is usually known to be tensor calculus. This thesis presents a formal category treatment on tensor notation, tensor calculus, and differential manifold. The focus lies mainly on acquiring and understanding the basic concepts of tensors and the operations over them. It looks at how tensor is adapted to differential geometry and continuum mechanics. In particular, it focuses more attention on the application parts of mechanics such as; configuration and deformation, tensor deformation, continuum kinematics, Gauss, and Stokes' theorem with their applications. Finally, it discusses the concept of surface forces and stress vector.