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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
111

Influence of geometry and placement configuration on side forces in compression springs

Rahul Deshmukh (7847843) 12 November 2019 (has links)
<div>A leading cause of premature failure and excessive wear and tear in mechanical components that rely on compression springs for their operation is the development of unwanted side forces when the spring is compressed.</div><div>These side forces are usually around 10% - 20% of the magnitude of the axial load and point in different directions in the plane perpendicular to the axis of the spring.</div><div>The magnitude and direction of the resultant of side forces varies very non-linearly and unpredictably even though the axial force behavior of the spring is very consistent and predictable.</div><div>Since these side forces have to be resisted by the housing components that hold the spring in place, it is difficult to design these components for optimal operation.</div><div><br></div><div>The hypothesis of this study is that side forces are highly sensitive to small changes in spring geometry and its placement configuration in the housing. <br></div><div><div>Several experiments are conducted to measure the axial and side forces in barrel springs and two different types of finite element models are developed and calibrated to model the spring behavior. </div><div>Spring geometry and placement are parameterized using several control variables and an approach based on design of experiments is used to identify the critical parameters that control the behavior of side-forces. </div><div>The models resulted in deeper insight into the development of side forces as the spring is progressively loaded and how its contact interactions with the housing lead to changes in the side force.</div><div>It was found that side-forces are indeed sensitive to variations in spring geometry and placement.</div><div>These sensitivities are quantified to enable designers to and manufacturers of such springs to gain more control of side force variations between different spring specimens.</div></div>
112

Local de nascimento e transferências conveniadas

Morata, Rodrigo Simonaio 07 February 2017 (has links)
Submitted by Rodrigo Simonaio Morata (rmorata@gmail.com) on 2017-02-16T16:40:53Z No. of bitstreams: 1 LOCAL DE NASCIMENTO E TRANSFERENCIAS CONVENIADAS.pdf: 432198 bytes, checksum: ea42bcb5bbddd6e2add57e2fcbbd1d08 (MD5) / Rejected by Renata de Souza Nascimento (renata.souza@fgv.br), reason: Rodrigo, boa tarde Seu trabalho foi rejeitado por não estar de acordo com as normas da ABNT. Efetuar as seguintes alterações: - Retirar a acentuação do nome Getúlio. - Na capa, abaixo do nome da Fundação é necessário retirar o nome do curso (mestrado profissional) e incluir o nome da escola (ESCOLA DE ECONOMIA DE SÃO PAULO). - Nas páginas que constam o nome da cidade, retirar a sigla SP que consta ao lado. - Alterar a numeração das páginas: por exemplo, se a Introdução foi a página 9, incluir o número e seguir. - Verificar o tamanho da Fonte utilizada, que também precisa estar de acordo com as normas. ABNT: http://sistema.bibliotecas-sp.fgv.br/bkab_normalizacao clicar em Normas para Apresentação de Monografias - página 12. Em seguida, submeter o trabalho novamente. Att on 2017-02-17T18:38:33Z (GMT) / Submitted by Rodrigo Simonaio Morata (rmorata@gmail.com) on 2017-02-20T00:20:53Z No. of bitstreams: 1 LOCALDENASCIMENTOETRANSFERENCIASCONVENIADASv1.pdf: 966739 bytes, checksum: 8b8fda4c7da9b76fb7063b1c7c754fcf (MD5) / Approved for entry into archive by Renata de Souza Nascimento (renata.souza@fgv.br) on 2017-02-20T16:28:24Z (GMT) No. of bitstreams: 1 LOCALDENASCIMENTOETRANSFERENCIASCONVENIADASv1.pdf: 966739 bytes, checksum: 8b8fda4c7da9b76fb7063b1c7c754fcf (MD5) / Made available in DSpace on 2017-02-20T17:43:01Z (GMT). No. of bitstreams: 1 LOCALDENASCIMENTOETRANSFERENCIASCONVENIADASv1.pdf: 966739 bytes, checksum: 8b8fda4c7da9b76fb7063b1c7c754fcf (MD5) Previous issue date: 2017-02-07 / O presente trabalho tem como objetivo avaliar se o local de nascimento de deputados federais e senadores influenciam nas transferências conveniadas celebradas entre o governo federal e o governo municipal. Para isto, elaborou-se um banco de dados contendo dados pessoais dos deputados federais e senadores eleitos no período entre 1998 e 2010, além de informações dos prefeitos, governadores, presidentes, dados socioeconômicos e valores pagos via convênios para o mesmo período. Utilizou-se dados do DATASUS, RAIS, banco de dados do TSE e dados do Portal da Transparência para esta elaboração. Aplicou-se painéis de efeito fixo tanto para os deputados federais quanto para os senadores, variandose o tipo de convênio celebrado. Estes foram segmentados nos seguintes grupos: valor total liberado entre a União e os municípios, o total liberado entre cada Poder (Executivo, Legislativo e Judiciário) e os municípios e sobre o recurso liberado por tipo de custeio (Custeio e Não-Custeio) entre a União e os municípios. Os resultados sugerem que, na maioria dos casos, o local de nascimento independentemente de onde tenha sido eleito o parlamentar, possui impacto positivo e significante na celebração de convênios, que pode variar entre R$ 4,60 a R$ 32,25 per capita. Quando considera-se a região de eleição, o local de nascimento de deputados possui impacto significativo em cerca de R$ 0,21 per capita em acordos com o Poder Legislativo e entre tratados cujo objetivo seja de não custeio (aproximadamente, R$ 50,00 per capita). Já para os senadores, os resultados são não conclusivos. / The present study aims to evaluate if the birthplaces of federal deputies and senators are favored in the allocation of federal government transfers. For this purpose, was created a database containing personal data of federal deputies and senators elected in the period between 1998 and 2010, as well as information from mayors, governors, presidents, socioeconomic data and amounts paid through federal transfers for the same period. It was collected data from DATASUS, RAIS, TSE database and Portal da Transparência website. To estimate the impact, fixed-effect panels were applied to both federal deputies and senators. The regressions differ from each other depending of the kind of transfer used. These were segmented into the following groups: total amount released between Union and municipalities, the total released between each Power (Executive, Legislative and Judiciary) and municipalities and the released according to the destination of the transfer (Costing1 and Non-Costing) between Union and municipalities. It was indicated that, in most cases, the town of birth regardless of where the parliamentarian was elected, has a positive and significant impact on the transfers agreements, which can vary from R$ 4.60 to R$ 32.25 per capita. When faced with the region of election, the place of birth of deputies has a significant impact of around R$ 0.21 per capita in agreements with the Legislative Branch and in Non-Costing transfers (approximately R $ 50.00 per capita). But for the senators, no conclusion was presumed.
113

Investigating the plasticity of sensory cortical circuits in the context of learning in the wild-type mouse and a conditional mouse model of fragile X syndrome / Défauts dans les circuits corticaux sensoriels et les déficits d'apprentissage chez la souris de type sauvage et chez une souris modèle conditionnelle du syndrome de l’X fragile

Erlandson, Melissa 11 December 2017 (has links)
L'objectif de ce projet est l’étude de la plasticité des circuits corticaux dans le contexte de l'apprentissage des souris « sauvages » et modèles du syndrome de l’X fragile. Des études sur l'efficacité de la combinaison d'enregistrement des potentiels de champ locaux extracellulaires avec la stimulation laser UV (LSPS) pour cartographier les réseaux ont été réalisées. Nous avons trouvé des enregistrements de champs extracellulaires qui pourraient être utilisés pour détecter les réponses synaptiques évoquées par LSPS. Nos résultats indiquent une méthode alternative pour obtenir des cartes complètes de réseaux intracorticaux excitateurs. Ensuite, nous avons développé un paradigme d'apprentissage associatif sensoriel et étudié ses effets sur les réseaux intracorticaux excitateurs du cortex baril. Ex vivo un affaiblissement des projections excitatrices entre les couches 4 et 2/3 qui dans les colonnes de vibrisses C a été observée. Enfin, nous avons utilisé ces mêmes approches dans une souris modèle du syndrome de l'X fragile (FXS). Pour étudier les liens entre les déficits sensoriels, l'apprentissage associatif et les altérations fonctionnelles des réseaux sensoriels, nous avons utilisé un modèle de souris mutantes dans lequel la pathologie FXS était ciblée sur la couche 4 du cortex somatosensoriel. Il a été constaté que les souris WT présentaient une dépression similaire, alors qu'elle était absente FXS. En conclusion, les études sur les mutants sensoriels de type sauvage ont mis en lumière les conséquences de l'apprentissage sur les réseaux corticaux sensoriels et les liens entre la plasticité des réseaux corticaux sensoriels et les capacités cognitives. / The aim of this project is to study the plasticity of the cortical circuits in the context of the learning of wild type mice and models of Fragile X Syndrome. First, investigations into the efficacy of recording combination of extracellular local field potentials with UV laser stimulation (LSPS) to map networks were performed. We found extracellular field records could be used to detect the synaptic responses evoked by LSPS. Our results indicate an alternative method for obtaining complete maps of excitatory intracortical networks. Next, we developed a sensory associative learning paradigm and studied its effects on excitatory intracortical networks the barrel cortex. Ex vivo a weakening of the excitatory projections between layers 4 and 2/3 which in the columns of vibrissae C was observed and declined function of the speed of the behavioural response. Finally, we used these same approaches in a Fragile X Syndrome (FXS) model mouse. To study the links between sensory deficits, associative learning, and functional alterations of sensory networks, we used a model of mutant mice in which the FXS pathology was targeted to the layer 4 of the somatosensory cortex. Our hypotheses were that behavioural conditioning would change the cortical sensory circuits of the FXS sensory mutant and that the abnormal plasticity of these circuits would in turn affect the performance. It was found the WT mice exhibited a similar depression, whereas it was absent FXS. In conclusion, wild type mouse and FXS sensory mutant studies shed light on the consequences of learning on sensory cortical networks and on the links between plasticity of sensory cortical networks and cognitive abilities.
114

Spatiotemporal properties of sensory integration in the mouse barrel cortex / Propriétés spatiotemporelles de l’intégration sensorielle dans le cortex à tonneaux de la souris

Vilarchao, María Eugenia 27 November 2015 (has links)
Lorsque les rongeurs explorent leur environnement, ils contactent activement les objets environnants avec leurs vibrisses qui sont ainsi défléchies selon des séquences spatiotemporelles complexes. Le système vibrissal est néanmoins capable d'extraire des informations pertinentes de ces stimulations pour générer un comportement tactile-dépendant. Une question se pose alors: Comment l’information multivibrissale globale est-elle encodée? La représentation corticale des vibrisses au sein du cortex somatosensoriel primaire (S1) du rongeur est dotée de structures anatomiquement remarquables, nommées "tonneaux", au niveau de la couche IV, qui sont organisées de la même manière que les vibrisses sur le museau de l’animal. A chaque "tonneau" correspond une colonne corticale, unité de traitement de l’information, qui reçoit en priorité les informations provenant la vibrisse principale (VP) correspondante. Des enregistrements extracellulaires réalisés dans notre équipe chez le rat ont révélé que les réponses des neurones du cortex S1 et du thalamus sont non seulement sensibles à la direction de déflection locale de leur VP, mais aussi à la direction d'un mouvement global de l’ensemble de leurs vibrisses. Afin de mieux comprendre la manière dont le réseau cortical traite ces scènes tactiles globales, nous avons construit un poste expérimental permettant d’enregistrer en temps réel l’activité du cortex S1 chez la souris par imagerie sensible au potentiel, tout en appliquant des stimuli tactiles complexes à l'aide d'une matrice de 24-stimulateurs vibrissaux. Nous avons de plus développé une méthode permettant d’aligner les données fonctionnelles ainsi obtenues par rapport la carte cytoarchitecturale du réseau cortical sous-jacent. Nous avons ainsi étudié premièrement la distribution spatiale de la sélectivité à la direction de déflection locale d’une vibrisse au niveau d’une colonne corticale. Les réponses aux différentes directions étaient localisées de manière légèrement distincte, autour du centre de la colonne, mais selon une organisation différente de celle précédemment décrite chez le rat. Nous avons montré par la suite que la sélectivité à la direction globale est spatialement organisée dans le cortex "en tonneaux" à l’échelle supra-colonnaire. Les colonnes correspondant aux vibrisses rostrales étant plus sélectives à la direction globale que les colonnes associées aux vibrisses caudales. En outre, les colonnes correspondant aux vibrisses dorsales répondent préférentiellement aux directions globales ventrales, tandis que les colonnes associées aux vibrisses ventrales répondent préférentiellement aux directions globales caudales. Enfin, les réponses induites par des directions globales caudo-ventrales étaient en moyenne les plus fortes pour toutes les colonnes. Nous avons montré que la répartition spatiale de la sélectivité à la direction globale peut être expliquée ni par la saillance prédominante de la position de départ de la séquence de stimulation multivibrissale (effet de bord), ni par la sommation linéaire des réponses aux déflections de quelques vibrisses. Les réponses aux stimulations globales de l'ensemble des vibrisses sont en effet fortement sous-linéaires, indépendamment de la direction de la stimulation. Brièvement, nous montrons ici que sortir de la vision classique du système vibrissal permet une meilleure compréhension de la façon dont les différentes caractéristiques des stimuli complexes sont traitées et de la manière dont les propriétés émergentes du cortex, comme la sélectivité à la direction globale, sont construites. / While rodents explore their environment they actively contact surrounding objects with their array of whiskers, resulting in a complex pattern of multiwhisker deflections. Despite this complexity, the whisker system is able to extract relevant information from the spatiotemporal sequence of deflections to generate touch-dependent behavior. The question that arises is: How is global multiwhisker information encoded? Whiskers are mapped onto layer 4 of the primary somatosensory cortex (S1) as discrete units named “barrels”. Each barrel-related vertical column processes information coming primarily from its corresponding principal whisker (PW). Previous experiments in our lab done with extracellular recordings have revealed that neurons in the rat S1 and thalamus not only show a preferred direction for the local deflection of the PW but also for the direction of a global motion across the whisker pad. To further understand how the cortical network processes global tactile scenes, we built a set-up that enables to perform voltage sensitive dye imaging of the mouse barrel cortex while applying precise tactile stimuli using a 24-multi-whisker stimulator. We further developed a technical method to map the recorded functional data onto the cortical structure. We first studied whether local direction selectivity is spatially distributed within the barrel-related column. Responses to different directions were slightly segregated on space close to the barrel center, but the distribution differed from the one previously described in rat S1, namely a pinwheel-like structure. We then showed that global direction selectivity is spatially organized in the barrel cortex. Columns related to rostral whiskers were more selective to the global direction than columns related to caudal whiskers. Moreover, the columns related to dorsal whiskers preferred ventral global directions, while the columns related to ventral whiskers preferred caudal global directions. Overall the responses to the caudo-ventral global directions were the strongest in average for all the columns. We showed that the spatial distribution of the global direction selectivity can be explained neither by the high salience of the starting position of the deflections on the whiskerpad (a border effect), nor by the linear summation of the responses to deflections of several whiskers. Responses to the global motion of the whisker array are indeed highly sublinear independently of the direction of stimulation. In conclusion, we show here that stepping aside from the classical view of the whisker-to-barrel cortex system allows a better understanding of how different features of complex stimuli are processed and how the emergent properties of the cortex, like the global direction selectivity, are built-up.
115

Statická rekonstrukce barokního vinného sklepa / Static reconstruction of the baroque wine cellar

Kešiar, Szabolcs January 2018 (has links)
The diploma thesis is focused on the design of structural support and construction modifications of a baroque wine cellar, which is part of a double-storeyed house. The first part deals with the statical analysis and structural support of a masonry barrel vault, which was loaded with a new building. The second part deals with the reconstruction of the double-storeyed object, which is in a state of disrepair with heavily developed cracks. The thesis contains a technical report, analysis of statics, drawing documentation and the work progress. The calculation of internal forces were executed by the software Scia Engineer 2017. The drawing documentation contains a formwork and reinforcement drawing, maping of cracks, leading of tensions in the walls and vault including of floor plans, sections and elevations, production plans of base plates and deviators, reinforcement drawing of concrete bond beam and finally the construction process of upper construction.
116

Vizuální detekce herního stavu biliardu / Detection of billiard's situation by means of camera

Zítka, Michal January 2010 (has links)
This thesis deals with processing pictures from game on billiard, their pre-processing, segmentation and classification of objects. Depending on objects classification is determinated state of game and it´s next step. Aim of this project is development of system for gameplay assistance.
117

Vinařský dům / Wine house

Neduchal, Martin January 2014 (has links)
The subject of the thesis is an object of a new building wine house. The object has two underground floors and two above floors and object has flat roof. Underground floors are designed from BUILD IN shuttering. Both above floors are from ceramic blocks. Ceiling construction is from reinforced concrete panels. Second underground Porotherm
118

Výstavní pavilon / Exhibition Pavilion

Očadlík, Martin January 2017 (has links)
The aim of the final thesis was to design and check the steel loadbearing structure of the exhibition pavilon. The basis for the structural design was a specified building layout. The assessment of the structure was made according to valid czech and european standards, including the system of "Eurocodes". Construction is situated in Zlin. The rectangular plan of the building is 45,0 m wide and 48,0 m long. The peripheral field of the roof is flat, while the central field is designed as a barrel roof. Main truss was designed with 6,0 m centre to centre distance. Structural design of the main loadbearing elements was made by the Dlubal RFEM v.5.07 software. Selected structure elements, including joints and column anchors were verified manualy.
119

Sportovní objekt, Kroměříž / Building for sport activities, Kroměříž

Foltýnová, Kateřina January 2017 (has links)
In this thesis I solve draft of new building of sport´s centre on the level of documentation for construction. The house is located on the outskirt of Kroměříž. It is a building without the basement which consist of one floor part and three floor part on the area of 531,73 m2. The plot´s terrain is flat. The circuit structure consist of reinforced concrete walls with ventilated facade – metal and wooden. Above one part of the floor plan there is flat green roof, above the other ther is barrel roof with glue laminated girders and compact roofing made of foamglass and metal sheet. In the building the is a hall with climbing wall, two smaller halls and one bigger, sanitary facilities for visitors and cafe/bar.
120

Felinus Domus: A Veterinary Hospital for Cats in Old Town Alexandria, Virginia

Butterworth, Mary Michele 15 April 2008 (has links)
Throughout time man has discovered that the human form, in all its harmonious proportion, can be used as a guide, gauge and tool to design and build structures. However, the human figure has not been the only organic form used to create architecture. Many animals create dwellings that synchronize with not only their own unique physical characteristics and survival instincts, but with their aesthetic preferences as well. It is logical that a design should respond to its surroundings, program and most importantly, its inhabitants. This thesis design is for two specific occupants: the cat and the human. They are both meant to inhabit the building wholly and simultaneously. The way each of them experiences and uses the space, however, differs greatly. For a building to survive it needs many of the same things as living creatures: sunlight, air and movement, to name a few. It also needs to function like a living creature. It must breathe, sleep, respond to the changing seasons, and adapt over time. This thesis is an investigation of how both human and cat can dwell in a building of harmonious proportion, scale, light, and material. / Master of Architecture

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