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Tesis sobre el tema "Tests de contact"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 12 de febrero de 2022

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1

Best, Nigel. "The predictive ability of clinical tests for contact lens induced dry eye." Thesis, Aston University, 2013. http://publications.aston.ac.uk/19599/.

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Approximately half of current contact lens wearers suffer from dryness and discomfort, particularly towards the end of the day. Contact lens practitioners have a number of dry eye tests available to help them to predict which of their patients may be at risk of contact lens drop out and advise them accordingly. This thesis set out to rationalize them to see if any are of more diagnostic significance than others. This doctorate has found: (1) The Keratograph, a device which permits an automated, examiner independent technique for measuring non invasive tear break up time (NITBUT) measured NITBU

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2

Pult, Heiko. "The predictive ability of clinical tests for dry eye in contact lens wear." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54731/.

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Thirty to fifty percent of contact lens wearers discontinue contact lens wear. Therefore it is essential for the clinician to have a predictive method that can forecast the development of dryness symptoms in contact lens wear. Contact lens wear induces tear film instability leading to increased tear film evaporation and its associated hyperosmolarity. This in turn causes ocular surface inflammation resulting in the release of cytokines, impacting tear mucin production, which further destabilises the tear film. Since this mechanism can only be fully evaluated by an intensive laboratory-based ap

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3

Zielke, Hanno [Verfasser]. "Time-related alterations and other confounding factors in direct sediment contact tests / Hanno Zielke." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2011. http://d-nb.info/1014298180/34.

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4

Nyrén, Miruna. "Skin sensitivity testing : a biophysical approach /." Stockholm, 2002. http://diss.kib.ki.se/2002/91-7349-173-X.

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5

Cruz, Fierro Oscar Eduardo de la. "Contributions to the Study of Intermittent Contact Haptic Interfaces." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS071.

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Les interfaces à retour d'effort sont des systèmes robotisés permettant d'interagir gestuellement de façon naturelle avec des environnements virtuels ou distants. Ces dispositifs sont utilisés dans différents contextes tels que la téléopération (e.g. nucléaire, sous-marine, spatiale), le manufacturing, les jeux vidéo, l'éducation, la médecine ou la rééducation, pour ne citer que quelques exemples. Pour les applications en réalité virtuelle, les utilisateurs manipulent généralement ces interfaces à l'aide d'une poignée qui est reliée mécaniquement au robot. Ce lien a une influence importante pu

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6

Modlitbová, Pavlína. "Využití organismu Eisenia foetida v testech ekotoxicity." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2012. http://www.nusl.cz/ntk/nusl-216853.

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Pesticide products used for plant protection are one of the chemicals that are intentionally brought into the environment. In Czech Republic there are legally used only those pesticide products, which are registered by SRS (State Phytosanitary Administration). For registration of these products there is required in addition to assessing the likely negative effects on human and animal health, also information whether the pesticide products negatively not affect the environment, in particular avoiding the contamination of aqua system or not effect the non target organisms. This master's thesis d

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7

Reis, Felipe Rovere Diniz 1979. "Dermatite alergica de contato ocupacional = perfil clinico-epidemiologico dos pacientes atendidos no ambulatorio de medicina do trabalho da Unicamp." [s.n.], 2010. http://repositorio.unicamp.br/jspui/handle/REPOSIP/310058.

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Orientador: Jose Inacio de Oliveira<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas<br>Made available in DSpace on 2018-08-15T19:21:40Z (GMT). No. of bitstreams: 1 Reis_FelipeRovereDiniz_M.pdf: 3469626 bytes, checksum: 9ef6c34f776f70e4620230f3b66bd0f4 (MD5) Previous issue date: 2010<br>Resumo: Diversos estudos descrevem o perfil clínico-epidemiológico e os resultados dos testes de contato das populações atendidas com suspeitas de dermatite alérgica de contato. Alguns evidenciam a provável relação causal com o trabalho; outros alertam para a necess

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8

Wade, James. "Contact damage of ceramics and ceramic nanocomposites." Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/24932.

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Herein, we study the contact damage performance of two armour ceramics, alumina and silicon carbide, with varying microstructures and one particle-reinforced ceramic nanocomposite, alumina/silicon carbide, in an attempt to understand the microstructural mechanisms that affect plasticity and cracking under quasi-static and dynamic conditions. Quasi-static contact damage was imitated using Vickers indentation over a varying load regime. Numerical analysis of the indentation size effect, performed using the proportional specimen resistance model, allowed the contributions of plastic deformation a

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9

Reed, Susan, of Western Sydney Hawkesbury University, and of Science Technology and Environment College. "Development of method to assess skin contact to chemicals." THESIS_CSTE_XXX_Reed_S.xml, 2001. http://handle.uws.edu.au:8081/1959.7/611.

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Chemical exposure of the skin has become a route of entry of some chemicals into the body and has come under major review in recent times. This research aims to develop a method of estimating skin exposure that is both reliable and non-prohibitive in cost. This involved the design and testing of skin patches adaptable for monitoring skin exposure to chemicals using several different types of absorbents which could be easily worn against skin. The final design of the patch used either activated charcoal or tenax as the absorbing medium. The patches were then desorbed with a solvent in order to

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10

Malvestam, Daniel. "Implementation of an In-situ Non-contact Temperature Controller for Active Thermal Fatigue Tests of Power Electronics." Thesis, Linköpings universitet, Institutionen för teknik och naturvetenskap, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-97059.

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A controller with thermopile IR-sensors is developed to monitor and control the temperature of power electronics during active accelerated thermal fatigue tests - power cycling. Bond wiring is the dominating method for connecting semiconductors to the package leads, distance points on a chip or chip modules within a package. 25-30\% of all package related failures of electronic devices during their operation life time can be related to bond wire failures. To test bond wires, power cycling test can be performed to stimulate failures in bond wire connections, enabling for further development and

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11

Delventhal, Brooke. "Simulation-Based Stability Tests in Total Knee Arthroplasty: Are Component Alignment, KneeLaxity, and Tibiofemoral Contact Forces Related?" The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1574422948246589.

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12

Zhang, Juan. "A novel fuzzy digital image correlation algorithm for non-contact measurement of the strain during tensile tests." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8205.

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Cette thèse a pour objet la mesure de déformations sans contact lors d'un essai de traction à l'aide de la méthode de corrélation d'images numériques DIC (Digital Image Correlation). Cette technologie utilise le repérage d'un motif aléatoire de tachetures pour mesurer avec précision les déplacements sur une surface donnée d'un objet subissant une déformation. Plus précisément, un algorithme DIC plus efficace a été formulé, appliqué et validé. La présente thèse comporte cinq parties consacrées au développement et à la validation du nouvel algorithme DIC: (a) la formulation mathématique et la pr

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13

Janakiraman, Venkatakrishna. "An Investigation of the Impact of Contact Parameters on the Wear Coefficient." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366906387.

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14

Bold, Lisa Clare. "Cumulative mild head injury in contact sport: a comparison of the cognitive profiles of rugby players and non-contact sport controls with normative data." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1002444.

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This study investigates the effects of cumulative mild head injury on the cognitive functioning of elite rugby players. A comprehensive battery of neuropsychological tests was administered to top national (Springbok) rugby players (n=26), national Under 21 rugby players (n= 19), and a non-contact sport control group of national hockey players (n=21). The test results of the Total Rugby group (Springbok Rugby and Under 21 Rugby players), the Under 21 Rugby group, the hockey controls, and the Total Rugby and Under 21 Rugby forward and backline players respectively, were each compared with establ

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15

Urbanová, Veronika. "Posouzení ekotoxicity kontaminovaných matric vnášených do ekosystému." Master's thesis, Vysoké učení technické v Brně. Fakulta chemická, 2015. http://www.nusl.cz/ntk/nusl-217165.

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This diploma thesis evaluates the influence of contaminated matrices introduced into the ecosystem in terms of ecotoxicity. It is focused mainly on matrix generated by anthropogenic activities, especially waste of various origin - industrial, energetical, biodegradable and more. For experimental purposes sewage sludge as the bulk waste with the ever-increasing production was selected. Sewage sludge was tested at its most common use - application on the agricultural land. This application is limited by legislative through the concentration limits of hazardous elements. For this reason, the pote

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16

Bertaux, Emilie. "Mechanical friction between skin and sport textiles yielding skin irritation." Valenciennes, 2008. https://ged.uphf.fr/nuxeo/site/esupversions/808ac959-0f92-473f-b3bb-2a0acab897a8.

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Afin d'améliorer le confort des coureurs en réduisant l'irritation de la peau due au phénomène de friction mécanique, le Textile Friction Analyzer a été récemment développé au sein de l'Empa. Cet appareillage permet de caractériser la friction peau-textile (T-shirt et chaussette) en utilisant une peau artificielle (skin model) et ceci en simulant les conditions de contacts durant la pratique sportive. Différentes peaux artificielles ont été développées afin de reproduire les propriétés frictionnelles de la peau du pied ou du téton humain. Les paramètres de tests comme la force de contact, la v

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17

Kobata, Clarice Marie. "Testes de contato em crianças com eczema." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/5/5133/tde-20092010-171934/.

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Introdução: Eczemas são manifestações inflamatórias da pele. Na infância se destacam a dermatite atópica (DA) e a dermatite de contato (DC). Os testes de contato correspondem a um método auxiliar para diferenciar a dermatite de contato por irritante primário (DCIP) da dermatite de contato alérgica (DCA) e definir a etiologia da DCA. Nos pacientes com DA, têm a faculdade de também auxiliar na identificação de substâncias que possam estar contribuindo para a piora do quadro. Objetivos: verificar a frequência de testes de contato positivos em crianças com hipóteses diagnósticas de DC e de DA asso

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18

Reed, Susan. "Development of method to assess skin contact to chemicals /." View thesis View thesis, 2001. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030520.115134/index.html.

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Thesis (Ph.D.) -- University of Western Sydney, Hawkesbury, 2001.<br>A thesis presented in fulfilment of the requirement for the degree of Doctor of Philosophy, College of Science, Technology and Environment, University of Western Sydney, Richmond, April 2001. Bibliography : leaves 138-148.

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19

Horsman, Mark. "Concussion in contact sport: investigating the neurocognitive profile of Afrikaans adolescent rugby players." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1002503.

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A number of computerised tests have been especially developed to facilitate the medical management of the sports-related concussion. Probably the most widely used of these programmes is the ImPACT test that was developed in the USA and that is registered with the HPCSA for use in the South African context. A recent Afrikaans version of the test served as the basis of the present study with the following objectives: (i) to collect Afrikaans ImPACT normative data on a cohort of Afrikaans first language adolescent rugby players with Model C education for comparison with existing South African Eng

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20

Lewis, Juan David. "Sensory processing and work performance of contact centre agents in South Africa." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/886.

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Thesis (MBA (Business Management))--Stellenbosch University, 2008.<br>ENGLISH ABSTRACT: The primary objective of this study was to establish if the Adolescent/Adult Sensory Profile questionnaire (AASP) could be used as a recruitment tool in selecting contact centre agents with a higher predictability for success and hence higher productivity. Contact centres around the globe face the challenge of high staff turnover and absenteeism, reducing profitability. It seems that work performance related to the way in which adults process sensory input has not been well researched. A model was devel

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21

Lay, Russo Nadège. "Différenciation des cellules souches embryonnaires murines et des cellules souches pluripotentes induites humaines en cellules dendritiques : cellules d'intérêt pour les tests de toxicologie." Nice, 2012. http://www.theses.fr/2012NICE4077.

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Le septième amendement à la directive cosmétique européenne impose un abandon des tests sur les animaux pour mesurer l’effet allergène ou irritant de certains composés utilisés en cosmétique. La réponse aux allergènes dans le modèle animal regroupe cinq aspects différents, mais dans les tests in vitro chaque aspect est étudié séparément. Parmi les tests de toxicité qui sont envisagés in vitre, les cellules dendritiques (cellules présentatrices de l’antigène) apparaissent come les cellules de choix pour étudier un de ces aspects. Cependant aujourd’hui il est difficile d’obtenir une source fiabl

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22

HEROUET, CORINNE. "Methodes alternatives a l'experimentation animale et hypersensibilite retardee de contact. Elaboration de tests in vitro predictifs du potentiel sensibilisant des xenobiotiques." Paris 7, 1999. http://www.theses.fr/1999PA077112.

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La peau participe au maintien de l'homeostasie de l'organisme par son role de barriere physique et sa fonction immunitaire. L'hypersensibilite retardee de contact est une inflammation cutanee specifique d'haptene, mediee par les lymphocytes t, qui survient 24 heures apres le contact cutane avec un haptene chez un individu sensibilise. Chez l'homme, son expression clinique est l'eczema allergique de contact, touchant plus de 10% de la population generale. Les haptenes sont des molecules chimiques reactives qui interagissent avec des proteines pour former un complexe haptene-proteine immunogene

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23

Higdon, Julia Dianne. "Measuring and Modeling Intercultural Attitudes Among Adolescents Across Europe: A Multi-Level, Multiple-Group Analysis Examining Student Attitudes, Intergroup Contact, and School Climate." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:16461055.

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European nations, built on democratic foundations, rely on participation that is inclusive of all groups. Among efforts to support social cohesion in Europe, investigating the development of intercultural attitudes—attitudes toward others on the basis of their intersecting group memberships—is a crucial area of research. Further, examining attitudes among adolescents is useful because of their growing capacity to understand complex systems, while still being engaged in formal education in which interventions aimed at developing positive attitudes are often applied. In this dissertation, I used

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24

Tanguturi, Sai Kishan. "Effect on Contact Resistance dueto Cross Connection of MC4 Compatible Connector." Thesis, Högskolan Dalarna, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-28838.

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Electrical connectors are the blocks that connect solar panels together. Whenever a photovoltaic plant commences, the main discussion goes around on solar panels, inverters, charge controllers, etc. But the topic of connectors is usually hardly discussed. Connectors in a photovoltaic system can definitely contribute to improve the overall performance of the system, provided that importance is given while selecting the connectors. The electrical connectors used in photovoltaic systems can be connected in two possible ways. Connectors can be connected either in a pure-connection or in a cross-co

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25

Dean, John E. "Travel to identity in the mid-nineteenth-to-mid-twentieth-century contact zone of New Mexico knowledge claim tests and Platonic quests /." Open access to IUP's electronic theses and dissertations, 2008. http://hdl.handle.net/2069/73.

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26

Pavlitová, Letková Zuzana. "Ekotoxikologické hodnocení vybraných průmyslových odpadních materiálů a anorganických kompozitů s jejich obsahem." Doctoral thesis, Vysoké učení technické v Brně. Fakulta chemická, 2011. http://www.nusl.cz/ntk/nusl-233320.

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This work sums up results of tests of ecotoxicity that were made on different kind of industrial waste materials like classical ash, fluid and fly ash, slags as well as anorganic composites containing waste materials. Composites might be used for building materials in the future. Ecotoxicological tests were used for evaluation of ecotoxicity, represented by 4 trophic levels, with several bioindicators evaluated at different exposure time periods. The battery of classical tests includes a growth inhibition test of the freshwater alga Raphidocellis subcapitata, an immobilization test of the clad

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27

Saldarriaga, Pablo Alejandro Correa. "Severe-to-mild wear transition during running-in of different steel-on-steel tribosystems in ball-on-disc dry sliding reciprocating tests." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-28082018-075415/.

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The main motivation of this doctoral thesis is to extend the current knowledge about the tribological behavior of a precipitation-hardenable (PH) austenitic stainless steel (SAE XEV-F or DIN 1.4882), used for manufacturing exhaust valves for internal combustion engines in passenger cars. For this purpose, dry sliding laboratory tests were carried out using this steel and other steels, mainly austenitic and martensitic, used as model materials for the comparative characterization of wear and friction. Experimental tests were conducted using an SRV®4 tribometer in a ball-on-disc configuration wi

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28

Sjögren, Florence. "Dermal cell trafficking : from microscopy to microdialysis /." Linköping : Univ, 2005. http://www.bibl.liu.se/liupubl/disp/disp2005/med883s.pdf.

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29

Del, Bufalo Aurelia. "Effets des sensibilisants sur la synthèse de la prostaglandine E2 : Mécanismes et intérêt dans la prédiction de l’allergie de contact." Thesis, Paris, AgroParisTech, 2012. http://www.theses.fr/2012AGPT0003/document.

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Les sensibilisants de contact sont des molécules réactives électrophiles qui ont la capacité de modifier des protéines de la peau pour former un antigène. Au delà de ce mécanisme d'hapténisation, le signal de danger induit par les sensibilisants conduisant à l'activation des cellules dendritiques (DC) est un élément déterminant dans l'induction de cellules T spécifiques de l'haptène. Dans le contexte du 7ième amendement à la directive cosmétique européenne, la mise en place d'une batterie de tests in vitro permettant de prédire le potentiel sensibilisant de molécules est indispensable pour l'i

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30

Aleksandra, Petrović. "Uticaj pola, težine i dužine trajanja oboljenja na kontaktnu senzibilizaciju kod obolelih od vulgarne psorijaze." Phd thesis, Univerzitet u Novom Sadu, Medicinski fakultet u Novom Sadu, 2015. https://www.cris.uns.ac.rs/record.jsf?recordId=90404&source=NDLTD&language=en.

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Kontaktna senzibilizacija, kao stanje specifične reaktivnosti kože, može biti egzogeni pokretač psorijaze. Rezultat je interakcije endogenih i egzogenih činioca. Jedan od najznačajnijih endogenih faktora kome se pripisuje uloga faktora rizika jeste pol. Cilj istraživanja bio je da se kod obolelih od psorijaze utvrdi učestalost i distribucija kontaktne senzibilizacije u odnosu na pol, razlike u distribuciji kontaktne senzibilizacije po polu  između osoba obolelih od psorijaze i osoba pod sumnjom na postojanje kontaktnog alergijskog dermatitisa, povezanost kontaktne senzibilizacije i težine

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31

Courbon, Cédric. "Vers une modélisation physique de la coupe des aciers spéciaux : intégration du comportement métallurgique et des phénomènes tribologiques et thermiques aux interfaces." Phd thesis, Ecole Centrale de Lyon, 2011. http://tel.archives-ouvertes.fr/tel-00713527.

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De nos jours, le contexte de mondialisation des marchés impose aux industriels des contraintes économiques sans précédent. Afin de rester concurrentiels, ils n'ont d'autre choix que de modifier leur façon de concevoir et d'innover. Les techniques de production sont directement concernées avec par exemple une volonté de réduire les cycles de mise au point visant à définir les paramètres optimaux de mise en forme. On constate alors l'immersion d'un besoin fort en moyens de support, flexibles et prédictifs, permettant de limiter les campagnes d'essais et de faciliter leur exploitation. La simulat

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Jaza, Rabii. "Towards a prediction of the tribological behaviour of a contact with third body particles : Relating the morphological descriptors of the third body particles with the rheological parameters of the contact." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI023.

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Ce travail de thèse est une preuve de concept. C'est la première partie d'un travail beaucoup plus vaste où nous essayons de répondre à la question de savoir s'il est possible d'établir un lien entre les aspects morphologiques des particules du troisième corps et les paramètres rhéologiques du contact où ils ont été créés. Les mesures rhéologiques sont presque impossibles à obtenir sans ouvrir le contact lui-même. Par conséquent, un tel lien pourrait changer la donne, en particulier dans la surveillance des machines et la prévision des pannes, ce qui est l'objectif à long terme de ce projet. D

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33

Finkelstein, Melissa. "The scrum-down on brain damage effects of cumulative mild head injury in rugby: a comparison of group mean scores between national rugby players and non-contact sport controls." Thesis, Rhodes University, 2000. http://hdl.handle.net/10962/d1002485.

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The present study comprises the second phase of a larger and ongoing research study investigating the brain damage effects of cumulative mild head injury in rugby. The purpose of this study was to determine whether cumulative mild head injury sustained in the game of rugby would cause brain injury as evidenced by impaired performance on sensitive neuropsychological tests. Participants were Springbok professional rugby players (n = 26), Under 21 rugby players (n = 19), and a non-contact sport control of national hockey players (n = 21). Comparisons of performance were carried out across a spect

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34

Tailhardat, Magalie. "Méthodes alternatives à l'expérimentation animale : un outil génomique pour l'évaluation du potentiel sensibilisant d'ingrédients de parfumerie." Lyon 1, 2006. http://www.theses.fr/2006LYO10250.

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L’eczéma de contact est une affection cutanée fréquente, liée à l’utilisation de nombreuses substances chimiques, appelées xénobiotiques, présentes dans notre environnement quotidien. Avant leur mise sur le marché, les produits cosmétiques sont testés pour s'assurer de leur innocuité avec un ensemble de tests prédictifs. Dans ce travail, nous avons développé une approche génomique pour identifier des marqueurs moléculaires des CD indicateurs du pouvoir sensibilisant des ingrédients de parfumerie. Nous avons mis en évidence 21 gènes cibles significativement modulés après exposition aux haptènes

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35

Del, Bufalo Aurelia. "Effets des sensibilisants sur la synthèse de la prostaglandine E2 : Mécanismes et intérêt dans la prédiction de l'allergie de contact." Phd thesis, AgroParisTech, 2012. http://pastel.archives-ouvertes.fr/pastel-01016611.

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Les sensibilisants de contact sont des molécules réactives électrophiles qui ont la capacité de modifier des protéines de la peau pour former un antigène. Au delà de ce mécanisme d'hapténisation, le signal de danger induit par les sensibilisants conduisant à l'activation des cellules dendritiques (DC) est un élément déterminant dans l'induction de cellules T spécifiques de l'haptène. Dans le contexte du 7ième amendement à la directive cosmétique européenne, la mise en place d'une batterie de tests in vitro permettant de prédire le potentiel sensibilisant de molécules est indispensable pour l'i

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36

Cunningham, Matthew P. "Intergroup Relations in Inclusive Classrooms| The Development and Validation of the Intergroup Relations Classroom Environment Scale (IRCES)." Thesis, Loyola Marymount University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3718206.

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<p> Before the Education for All Handicapped Children Act (1975), most efforts to educate students with disabilities happened in isolation. Within the last 40 years, a growing number of districts and individual schools have experimented with inclusive models in hopes of successfully educating students with and without disabilities in the same classrooms; however, general education students still hold negative attitudes toward students with disabilities. The contact hypothesis of intergroup contact theory postulates that prejudicial attitudes toward out-groups can be alleviated if the following

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Moraes, Marta Bueno de. "Estudo teórico de característica elétrica de contato schottky não íntimo metal-isolante amorfo e estrutura metal-isolante-metal." Universidade de São Paulo, 1989. http://www.teses.usp.br/teses/disponiveis/54/54132/tde-16012008-104334/.

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No presente trabalho foi desenvolvida uma teoria de característica elétrica da estrutura metal-isolante-metal considerando uma camada fina de óxido entre o metal e o isolante, sendo o óxido um outro isolante de banda de energia proibida mais larga. Foi considerada uma distribuição energética uniforme de estados de impurezas à interface óxido-isolante. Estudamos a distribuição real do potencial na região de carga espacial usando a equação de Poisson. Através desta distribuição obtemos a relação entre o potencial de contato e a carga positiva na região de depleção e assim a característica capac

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Almeida, Fabio Cardoso. "Análise das forças de contato e comportamento dinâmico de rodeiro ferroviário." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3152/tde-05092006-113355/.

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Sistemas dinâmicos ferroviários são modelados levando-se em consideração as forças de contato roda trilho. As equações de movimento são fortemente influenciadas pela determinação dessas forças, o que requer o conhecimento da mecânica de contato, ferramenta imprescindível na previsão do comportamento de uma composição ferroviária. O rodeiro é responsável por receber as excitações na forma de irregularidades e imperfeições da via e transferi-la para a suspensão primária. A proposta dessa dissertação consiste em realizar simulações no domínio do tempo, da resposta do comportamento dinâmico do rod

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Jain, Rahul. "Investigations on Multiscale Fractal-textured Superhydrophobic and Solar Selective Coatings." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78725.

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Functional coatings produced using scalable and cost-effective processes such as electrodeposition and etching lead to the creation of random roughness at multiple length scales on the surface. The first part of thesis work aims at developing a fundamental mathematical understanding of multiscale coatings by presenting a fractal model to describe wettability on such surfaces. These surfaces are described with a fractal asperity model based on the Weierstrass-Mandelbrot function. Using this description, a model is presented to evaluate the apparent contact angle in different wetting regimes. Ex

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Jensen, Jessie Ruth. "Examining the Effects of Explicit Teaching of Context Clues in Content Area Texts." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3076.pdf.

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Neves, Julio Cesar Klein das. "Desenvolvimento de um equipamento para ensaio de fadiga de contato esfera sobre plano e sua aplicação na caracterização de ferros fundidos com matrizes de elevada dureza." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-11122006-131939/.

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Esse trabalho descreve o projeto e construção de um equipamento destinado ao estudo de fadiga de contato de rolamento e sua posterior aplicação na caracterização de ferros fundidos. O trabalho foi iniciado com a utilização de um equipamento previamente existente no Laboratório de Fenômenos de Superfície da EPUSP, a máquina I. Esse equipamento era baseado na substituição das pistas externas de um rolamento axial de esferas por corpos de prova na forma de arruelas. Ensaios preliminares mostraram que a máquina I apresentava limitações, a principal delas era não ser capaz de reproduzir integralmen

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Bruel, Paulo Eduardo Nunes. "Abordagem analítica e caracterização de contato entre superfícies." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18149/tde-06122006-003830/.

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Pode-se definir o tato através da capacidade de um corpo sentir o contato, localizá-lo, reconhecer a forma e a rugosidade da superfície impactante. Normalmente, não se encontram estruturas analíticas adequadas para descrever o fenômeno. Neste trabalho, pretende-se determinar a localização dos pontos de contato entre dois corpos através da análise dos sinais resultantes das vibrações causadas pelo contato, além de estimar a geometria da superfície do objeto impactante. A descrição qualitativa do impacto é obtida através da análise de uma série de funções matemáticas que geram uma base ortogonal

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Mesquita, Ísis Fiorello de Oliveira. "Teste alérgico de contato nos portadores de úlceras crônicas de membros inferiores." Botucatu, 2019. http://hdl.handle.net/11449/191155.

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Orientador: Luciana Patrícia Fernandes Abbade<br>Resumo: Introdução: Úlceras crônicas de membros inferiores são muito prevalentes. O tratamento local é feito através do uso de curativos específicos e outros produtos tópicos. A utilização destes podem causar dermatite de contato alérgica, aumentando a morbidade relacionada à doença e retardo da cicatrização. Objetivos: Identificar a frequência e principais substâncias alergênicas relacionadas à dermatite de contato nos pacientes portadores de úlceras crônicas nos membros inferiores. Métodos: Estudo observacional, com desenho transversal, realiz

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Silva, Alysson Alexander Naves. "Simulação numérica de escoamentos bidimensionais com superfícies livres e linhas de contato dinâmicas." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-22062010-145307/.

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Um método lagrangeano-euleriano arbitrário para a resolução de escoamentos dominados por tensão superficial é apresentado neste trabalho. Tais escoamentos são importantes em muitas aplicações, especialmente em canais capilares que frequentemente aparecem em escoamentos em microescala. A resolução deste tipo de escoamento apresenta vários desafios que são abordados neste trabalho. O escoamento é resolvido somente para a fase líquida, com condições de contorno apropriadas para a superfície livre que delimita o líquido e o gás, que é representada por arestas e vértices da malha computacional. Est

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Neto, Dorival Piedade. "Sobre estratégias de resolução numérica de problemas de contato." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18134/tde-14072009-165646/.

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Os problemas de contato representam uma classe de problemas da mecânica dos sólidos para a qual a não-linearidade é introduzida pela alteração das condições de contorno, as quais só podem ser determinadas no decorrer do processo de resolução. O presente trabalho trata dos problemas de contato abordando aspectos de sua formulação e implementação numérica. Apresentam-se, em particular, as formulações de dois diferentes tipos de elemento de contato revendo-se, mais detalhadamente, o tratamento numérico das restrições decorrentes de contato. Algumas estratégias para resolução computacional desta c

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Tomanik, Antonio Eduardo Meirelles. "Modelamento do desgaste por deslizamento em anéis de pistão de motores de combustão interna." Universidade de São Paulo, 2000. http://www.teses.usp.br/teses/disponiveis/3/3132/tde-08122004-203125/.

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O desgaste de anéis de pistão e cilindro foi modelado através de um programa computacional que calcula as pressões hidrodinâmicas e de contato rugoso agindo nas superficies deslizantes de contato. Os valores previstos de desgaste são comparados com um ensaio em dinamometro de um motor diesel.<br>The wear of piston rings and cylinder liner was modelled through a computer code that calculates the hydrodynamic and roughness contact pressures acting in the contact surfaces. The predicted wear is compared with a 750 hours dynamometer test of a medium duty diesel engine

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Marques, Débora Maria Mitter. "Estudo do contato entre sólidos metálicos por meio de simulações de dinâmica molecular." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-29062012-153859/.

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Neste trabalho, a relação entre a adesão e o grau de desordem de superfícies em contato é estudada por meio de simulações por dinâmica molecular. O sistema em estudo é composto por um indentador cilíndrico rígido e um bloco deformável. Um reservatório térmico é colocado logo abaixo do bloco, de forma a manter o sistema a temperatura ambiente. Os sólidos são feitos do mesmo material e são modelados por intermédio do potencial genérico de Lennard-Jones. A adesão entre as superfícies é variada gradualmente por meio da variação do raio de corte do po

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Greber, Nicole. "Test wizard automatic test generation based on design by contract /." Zürich : ETH, Eidgenössische Technische Hochschule Zürich, Professur für Software Engineering /Chair of Software Engineering, 2004. http://e-collection.ethbib.ethz.ch/show?type=dipl&nr=194.

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Silvestre, Marilene Chaves. "Avaliação da dermatite de contato alérgica ao níquel através da técnica de imuno-histoquímica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/5/5133/tde-09082017-103915/.

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A dermatite de contato alérgica (DCA) ao íon níquel (Ni2+) é uma dermatose inflamatória frequente nos países industrializados. Envolve a ativação de células T específicas ao Ni2+, seguida da proliferação e indução de um perfil misto de citocinas, tanto pró-inflamatórias quanto reguladoras, sugerindo que vários subtipos de células T (helper - Th e citotóxica - Tc) estão envolvidos na resposta imune. Este estudo teve como objetivo a análise das citocinas TNF-alfa, INF-y, IL-2, IL-4, IL-10, IL-13, IL-17 e IL-23 pela técnica de imuno-histoquímica, para tentar identificar a prevalência de um ou mai

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Nord, Marie. "Memory Tests with Ambient Odours "Make Scents"." Thesis, Stockholms universitet, Psykologiska institutionen, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-125202.

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An ambient odour of anise was used in a context-dependent memory study with three different memory tasks targeting both declarative and non-declarative memory functions. Declarative memory was assessed by means of two episodic memory tests; recall of a prose text and a complex figure. Priming was used to assess the non-declarative memory with word fragment completion. Memory was tested immediately and after 48 hours. The results showed a significant main effect of context (odour or not) for all three tests in favour of the olfactory context. In addition, a significant main effect of time was o

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