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1

Borget, Gisela Lilian. "Variation in arch shape and dynamics of shape change from infancy to early childhood." Thesis, University of Iowa, 2017. https://ir.uiowa.edu/etd/5421.

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Introduction: In order to properly diagnose and treatment plan, an orthodontist needs to be knowledgeable about the changes that occur to the maxillary and mandibular dental arches throughout growth. The purpose of this study is to provide an analysis of morphological shape differences seen in the maxillary and mandibular dental arches individually, as well as together, from birth to 3 years of age. Methods: Dental casts from the Iowa Infant Growth study ranging from 2 months to age 4 were photographed in the occlusal plane. The images were landmarked with 3 standard landmarks and 10 sliding s
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Varner, Taylor Blake. "Landmark-based approach to examining changes in arch shape: a longitudinal study." Thesis, University of Iowa, 2015. https://ir.uiowa.edu/etd/1783.

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Objective: Variation in dental arch shape and arch relations from the primary to the permanent dentition were studied in an untreated longitudinal sample from the Iowa Fluoride Study and Growth Study data (55 females and 63 males). Methods: 3D coordinate data from 68 landmarks located on maxillary, mandibular, and occlusal dental cast scans from ages 5, 9, and 13 were submitted to a Procrustes fit prior to a Principal Component (PC) analysis to capture symmetric and asymmetric aspects of arch shape variation. Covariance pattern models were used to determine longitudinal arch shape changes from
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Tan, Fengjie [Verfasser], and Tom [Akademischer Betreuer] Lahmer. "Shape Optimization Design of Arch Type Dams under Uncertainties / Fengjie Tan ; Betreuer: Tom Lahmer." Weimar : Bauhaus-Universität Weimar, 2019. http://d-nb.info/1193423937/34.

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Lowe, Nathan John. "Theoretical Determination of Subcritical Sequent Depths for Complete and Incomplete Hydraulic Jumps in Closed Conduits of Any Shape." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2702.pdf.

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Miyazaki, Yusuke. "Fundamental study on seismic behavior of hinge types of precast arch culverts in culvert longitudinal direction." Kyoto University, 2019. http://hdl.handle.net/2433/242475.

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Totková, Lucie. "Lávka pro pěší přes řeku Bečvu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2016. http://www.nusl.cz/ntk/nusl-240273.

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The aim of this thesis is the design of curved footbridge across the river Bečva. Curved footbridge consists of a supporting steel arch, which brings the steel struts to the steel arch under the concrete deck. The steel arch with crosspieces is coupled with concrete deck using the coupling pins. The deck is formed from reinforced concrete. Structural model is carried out in a computer program ANSYS. The structural design is handled in accordance with applicable European standards. The design considers pedestrians load and temperature effects.
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Houšť, Vladimír. "Tenkostěnné přesypané konstrukce." Doctoral thesis, Vysoké učení technické v Brně. Fakulta stavební, 2015. http://www.nusl.cz/ntk/nusl-234547.

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The thesis is devoted to analysing of flexible buried arch structures. Modelling of the flexible concrete arch is carried out via a nonlinear finite element model that accounts for soil constitutive relations, soil-structure interactions, sequential construction stages and soil compaction. Advanced FE-model was verified by measurement obtained by full-scale field testing of two buried arches. Mathematical optimization methods of genetic algorithms and Levenberg-Marquardt method are applied to already calibrated complex computational models in order to reduce bending and associated flexural str
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Bezručová, Kristína. "Lávka pro pěší přes lagunu." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372296.

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The aim of this thesis is the design and analysis of pedestrian bridge across the lagoon. Three variants were designed. The variant of structure, which combines stress ribbon with steel arches, was chosen for analysis. There is a chapter in this thesis which deals with an ideal shape of arches for different types of loads. The calculation of load effects was made in software Ansys 17.0, considering scnstruction stages. Ultimate limit state and state limit state are evaluated. For evaluation of concrete cross sections was used MS Excel. Steel cross sections were evaluated in software Ansys 17.0
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Velešík, Marek. "Obloukový most přes údolí." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-409784.

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The main focus of this master thesis is the design and assessments of the bridge structure consist of a stress ribbon supported by a steel arch. Three preliminary studies of pedestrian bridges above the valley were created and the one with semi-through deck supported by arch through cables was chosen to detail processing. This thesis includes a chapter, which deals with finding the ideal shape of arch. The computational beam model for the analysis of the structure was created in software Ansys Mechanical including the construction stages. The correctness of the computational model was verified
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Sakne, Matiss. "Structural design and performance of tube mega frame in arch-shaped high-rise buildings." Thesis, KTH, Bro- och stålbyggnad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210024.

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A recent development and innovation in elevator technologies have sprawled interest in how these technologies would affect the forms and shapes of future high-rise buildings. The elevator that uses linear motors instead of ropes and can thus travel horizontally and on inclines is of particular interest. Once the vertical cores are no longer needed for the elevators, new and radical building forms and shapes are anticipated. It is expected that the buildings will have bridges and/or the buildings themselves will structurally perform more like bridges than buildings, therefore this study address
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Koskenniemi, Isak. "Preparing parts for Wire and Arc Additive Manufacturing (WAAM) and net-shape machining." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74296.

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WAAM is a relatively unexplored additive manufacturing method. Although research in this area has been performed for some years and the hardware is relatively cheap, the method is not widely used. As the name suggest, it uses wire and an arc welding equipment to deposit beads on top of each other to create a geometry. As WAAM is a near net-shape method, the parts must be machined to its net-shape after the beads has been deposited. BAE Systems Hägglunds AB are investigating the use of WAAM in an industrial robot cell and this Master’s thesis has been written with the purpose of enabling the us
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Ridder, Sascha [Verfasser], Henning [Akademischer Betreuer] Soltwisch, and Richard D. [Akademischer Betreuer] Sydora. "Experimental investigation of the electron density in expanding arch-shaped magnetic flux tubes / Sascha Ridder. Gutachter: Henning Soltwisch ; Richard D. Sydora." Bochum : Ruhr-Universität Bochum, 2015. http://d-nb.info/1079843248/34.

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Shamsudin, Shamsul Anuar. "Kinematic Synthesis of Planar, Shape-Changing Rigid Body Mechanisms for Design Profiles with Significant Differences in Arc Length." University of Dayton / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=dayton1365911657.

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ARAUJO, Juliana Vale. "Avaliação de risco no negócio de transmissão de Energia Elétrica : uma proposta de equivalência entre debêntures e ações ordinárias." Universidade Federal de Pernambuco, 2008. https://repositorio.ufpe.br/handle/123456789/3907.

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Made available in DSpace on 2014-06-12T17:17:13Z (GMT). No. of bitstreams: 2 arquivo3573_1.pdf: 2183173 bytes, checksum: b0ac8e62ddb36a1892ad1922d6ad45b7 (MD5) license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2008<br>Os empreendimentos de transmissão de energia elétrica são afetados significativamente pelo financiamento que contratam, pois a repercussão do serviço da dívida afeta o lucro da empresa e sua disponibilidade de caixa. Atualmente, a fonte de recurso mais barata existente no mercado são os empréstimos concedidos pelo Banco Naciona
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Singh, Jagat. "Commissioning of an Arc-Melting/Vacuum Quench Furnace Facility for Fabrication of Ni-Ti-Fe Shape Memory Alloys, and the Characterization." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2104.

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Shape memory alloys when deformed can produce strains as high as 8%. Heating results in a phase transformation and associated recovery of all the accumulated strain, a phenomenon known as shape memory. This strain recovery can occur against large forces, resulting in their use as actuators. The goal of this project is to lower the operating temperature range of shape memory alloys in order for them to be used in cryogenic switches, seals, valves, fluid-line repair and self-healing gaskets for space related technologies. The Ni-Ti-Fe alloy system, previously used in Grumman F-14 aircrafts and a
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Tevesz, Maria. "L'arc dans les constructions haut-médiévales des régions nord occidentales du pourtour méditerranéen : étude d'historiographie et d'histoire de l'architecture." Thesis, Bordeaux 3, 2018. http://www.theses.fr/2018BOR30062/document.

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L’étude présentée ici a pour but d’analyser la manière d’utiliser l’arc outrepassé, en plan et en élévation, et l’arc en retrait sur ses piliers, dans une région et dans un temps pragmatiquement défini du monde méditerranéen particulièrement riche en éléments architecturaux de ce type. L’arc en retrait n’est pas inconnu dans la recherche mais, faute d’identification précise et donc de terminologie adaptée, il a été confondu avec l’arc outrepassé sous des dénominations différentes. Faisant l’objet de diverses théories dans l’historiographie, ces deux types d’arcs ont été utilisés comme argument
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Winder, Brian Geoffrey. "Achieving Complex Motion with Fundamental Components for Lamina Emergent Mechanisms." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2279.pdf.

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Lachiguer, Amani. "Effet de la diffusion de l'hydrogène sur le comportement thermomécanique des alliages à mémoire de forme (AMF) à base nickel-titane : caractérisation, modélisation et simulation numérique." Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0384/document.

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Une dégradation des propriétés mécaniques des arcs surperélastiques en alliages à mémoire de forme à base NiTi, utilisés dans les traitements orthodontiques, a été observée après absorption d'hydrogène. L’effet de l’hydrogène a été étudié, dans un premier temps, sur le comportement global des arcs à l’aide des essais de traction et dans un deuxième temps, sur le comportement local à l’aide des essais de nanoindentation. Pour modéliser le comportement des AMFs après absorption d'hydrogène, une première approche a été proposée, en introduisant la dépendance des paramètres de la transformation ma
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19

Marmelo, Patricia C. "Real time evaluation of weld quality in narrow groove pipe welding." Thesis, Cranfield University, 2012. http://dspace.lib.cranfield.ac.uk/handle/1826/7918.

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With the growth in pipeline installations all over the world, there is a great demand for highly productive and robust welding systems. Mechanised pipe welding has been developed over the last 50 years and the present focus is towards development of automated pipeline welding systems. Pipeline welding automation is aimed at reducing costs and improving the installation quality. To attain fully automated pipe welding systems there is a need to rely on sensors and controls systems to mimic human like capabilities, such as visual inspection, in real time. The key aim of this work is to develop an
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20

Stadler, Marine. "Etude expérimentale du mouvement hydrodynamique d'un bain métallique et de sa production de vapeurs sur une configuration de soudage TIG." Thesis, Toulouse 3, 2016. http://www.theses.fr/2016TOU30019/document.

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Le soudage à électrode réfractaire, plus souvent appelé TIG (Tungsten Inert Gas), est un procédé dans lequel un arc électrique est généré entre une électrode en tungstène et les pièces à souder sous un flux gazeux inerte. Le transfert d'énergie entre l'arc et l'anode donne naissance à un bain métallique et à la production de vapeurs. La qualité des soudures obtenues est directement liée au comportement du plasma et aux phénomènes physiques présents dans le bain métallique (effets Marangoni, force de traînée, gravité, forces de Laplace, conduction thermique...). L'objectif de ces travaux de thè
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21

Gorgol, Martin. "Spojování obrazů podle tvaru hran." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2015. http://www.nusl.cz/ntk/nusl-219999.

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This master’s thesis describes the design and implementation of the application that created the basis set pieces "puzzle" according to the shape of the folded edges of the original image. This application is developed using Matlab. The work also describes how to create a database of actual pieces of the puzzle composite photo image. Closer was also focused on finding the characteristic section points, their segmentation and appropriate description. There is dismantled procedure for selecting the types of symptoms and their extraction. On the basis of suitably described pieces of segmented par
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Yang, ming-chang, and 楊明長. "An Investigation into the Dynamic Mechanical Behaviors of Special-shape Arch Bridge." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/34409874637243721816.

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Huang, Yan-Ze, and 黃彥澤. "An Investigation into the Static Mechanical Behaviors of Special-shape Arch Bridge." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/54169896209424522596.

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Lin, Chih-wei, and 林子瑋. "Phase equilibria, Pourbaix diagram and corrosion properties of dental-arch-wire-used shape memory alloys." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/q3fqkt.

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Barbosa, David José Pintão dos Santos Fontes. "Gas tungsten arc welding of NiTi shape memory alloy." Master's thesis, 2014. http://hdl.handle.net/10362/14328.

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Shape memory alloys are characterized by the ability of recovering their initial shape after being deformed and by superelasticity. Since the discovery of these alloys, a new field of interest emerged not only for the scientific community but also to many industries. However, these alloys present poor machinability which constitute a constrain in the design of complex components for new applications. Thus, the demand for joining techniques able to join these alloys without compromising their properties became of great importance to enlarge the complexity of existing applications. Literatur
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Crispim, Beatriz Prego Lopes. "Gas Tungsten Arc Welding of Cu-Al-Mn Shape Memory Alloys." Master's thesis, 2018. http://hdl.handle.net/10362/57509.

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Recently, applications using shape memory alloys (SMAs) have been attracting interest, due to their unique properties. Their application extends to a wide variety of fields, such as automotive, aerospace, biomedical and civil engineering industries. Among the existing classes of shape memory alloys, NiTi is the most studied one. However, Cu-based SMAs are emerging as potential substitutes of NiTi, due to their lower cost and potential for application in damping devices. The development of joining technologies is of major interest, because it allows the growth of potential applications of any
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Wei-CheTai and 戴偉哲. "The Analysis and Design of a Axial Flux Arc Shape Motor." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/03596922491747497439.

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碩士<br>國立成功大學<br>航空太空工程學系碩博士班<br>100<br>The thesis considers the analysis and design of an Axial-Flux Permanent Magnet (AFPM) motor and its application to auxiliary power system for bikes. Owing to its thin type structure and high torque characteristic, it is convenient to implement the motor on a conventional bike and is able to provide the auxiliary power for the riders when it is needed.. The main design idea of the auxiliary motor is from the structure of a linear motor. The propelling force applied to the wheel is generated through the attraction and repulsion between the magnets. The roto
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LIN, JUN-HAO, and 林俊豪. "A Study of Micro-Arc Oxidation of TiNiSi Ternary Shape Memory Alloys." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/39rh9r.

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碩士<br>國立高雄應用科技大學<br>模具工程系<br>106<br>Ti50Ni49Si1 shape memory alloy (SMA) surfaces were modified by micro-arc oxidation in phosphoric acid by applying constant voltages. The microstrusture and oxide-film properties (surface roughness, wettability, and film adhesion) were investigated. The results indicated that the pore size, film thickness, and P content increased with applied voltage. The porosity of surface, water contact angle, and shape recovery rate decreased with applied voltage. The micro-arcoxidized film, comprising Ti oxide, Ni oxide, and phosphate compounds, exhibited a glassy amorph
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Chen, Yu-Chi, and 陳育齊. "DEP Chip with Arc-Shaped Microelectrodes Array for Particles Separation." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/92602097578117254079.

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碩士<br>南台科技大學<br>奈米科技研究所<br>97<br>This research presents a microfluidic chip with arc- shape electrodes array (ASEA) for separation of different-size particles/Cells based on negative dielectrophoresis (nDEP). The purpose of ASEA is to generate the dielectrophoretic force perpendicular to the microchannel direction within the gap between each pairs of arc-shape electrodes. The DEP chip consisted of two regions of ASEA; first ASEA was design for aligning all particles floating along with the wall of microchannel before enter the second ASEA region; the configuration of second ASEA was upside dow
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Kwabi, Essi. "Mineral, fluid, and elastic property quantification from well logs and core data in the Eagle Ford shale play : a comparative study." 2013. http://hdl.handle.net/2152/22369.

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Organic shales have become one of the greatest sources of hydrocarbon thanks to novel production techniques such as hydraulic fracturing. A successful hydraulic fracturing job, however, is dependent on several rock properties such as mineralogy and elasticity. A reliable estimation of such properties is therefore necessary to determine ideal rocks for horizontal well placement. In this study, rock types within the Eagle Ford shale that would be suitable for hydraulic fracturing are identified through interpretations of available well logs and core data. A comparative study of petrophysical pro
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Chen, Chin-Lung, and 陳金龍. "Study of Periodic Flow Pattern and Convection Heat Transfer in a Lid-Driven Arc-Shape Cavity." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/64357277040749471796.

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博士<br>大同大學<br>機械工程學系(所)<br>93<br>ABSTRACT Experimental and numerical study has been performed to investigate the combined effects of lid movement and buoyancy on flow pattern and heat transfer characteristics for the mixed convective flow inside an arc-shape cavity. The governing equations in terms of the stream function-vorticity formulation are solved by the finite-volume method coupled with a body-fitted coordinate transformation scheme. In experiments, steady-state temperature data are measured by K-type thermocouples, and the flow field is visualized by using kerosene smoke. The task of t
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Hsu, Shun-Ting, and 許舜婷. "Effect of Injecting Minor Liquid Carbon Sources on Graphite Encapsulated Nickel Nanoparticles Synthesis and Arc-shape Conversion." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/25537008826060792842.

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碩士<br>國立臺灣大學<br>地質科學研究所<br>104<br>Graphite Encapsulated Metal (GEM) nanoparticles are spherical core-shell structured composite material with a diameter ranging from 5–100 nm. The core of GEM is metal, and its outer shell is composed of several layers of graphite/graphene which can preserve the inner core in a severe environment, such as from acid erosion and oxidation. It is well known that many different functional groups, including carboxyl and hydroxyl, can be easily attached to the surface of carbon materials. Recently, several studies have revealed that GEM has a great potential to becom
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MISSERI, GIULIA. "Seismic vulnerability of pointed arches under rigid body assumption. Numerical and experimental evaluations." Doctoral thesis, 2017. http://hdl.handle.net/2158/1079986.

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Conservation of cultural heritage against seismic risk constitutes one of the greatest challenges of the scientific community, which is engaged in refining efficient solutions for practitioners as well as theoretical mechanical models. The response of distinctive architectural elements, like arches, domes and vaults, has attracted the interest of historical scientists, but still today comprehensive and general formulations lack a full dynamic perspective. Among architectural elements, the arch is certainly an iconography of mechanics applied to architecture. Indeed, extensive investigations ar
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Lin, Bo-Heng, and 林柏亨. "Improving the Surface Uniformity of Micro-arc Oxidation Ceramic Film on Aluminum Alloy Parts in Complex Shapes." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/23836959851736334159.

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碩士<br>龍華科技大學<br>化工與材料工程系碩士班<br>104<br>This research studied 2024 aluminum alloy used in the most important bicycle parts: transmission part (gear wheel and chain), suspension fork and brake system (brake discs). For the general shape (such as block, sheet like workpieces) of 2024 aluminum alloy, the surface hardness and wear resistance can be significantly improved after micro-arc oxidation treatment under the DC power supply. However, in complex shapes of the chain gear wheel or of the workpiece cylinder having an inner surface (bike suspension fork), uniformity and coverage properties are st
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Lin, Wen-Han, and 林文翰. "Tooth Contact Analysis of Helical Gear Pair with Double Involute and Double Circular Arc Ladder-shaped Teeth." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/40532519086341594025.

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碩士<br>國立交通大學<br>機械工程系<br>89<br>The new trend of the gear design is to provide the gear teeth with surfaces being in contact at every instant at a point but not at a line to reduce the gear sensitivity to gear axial misalignments. By applying the mismatch of pinion-gear tooth surfaces, the tooth contact becomes a point contact instead of a line contact. The bearing contact is located at the middle region of the gear tooth surfaces and thus edge contact can be avoided. Unlike the generation of conventional involute helical gears, two imaginary rack cutters, instead of one, are applied for the ge
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Sedláček, Václav. "Tunel Blanka: Inženýrskogeologické problémy a rizika ražby." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-343023.

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The Blanka tunnel has two boring sections: Brusnice tunnel and Královská obora tunnel. Both tunnels were boring in difficult geologycal conditions, but the geology conditions of these tunnels are not same. Also they had not the same hazards during boring. There was used a spectrum of different technical works with hazard reduction purpose and safety process of boring. There were three serious accidents, wnich everyone made a creater on the surface, but they have not the same causes. This text has a task to describe a geological survey before and during the boring of both tunnels. How other rea
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