Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 104 for “"HAZ"”.
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Desarrollo de técnicas de diseño para reflectarrays impresos multicapa con haz conformado
… de fase del campo reflejado asociado a un haz conformado , se diseñan cada uno de los elementos radiantes que consisten en parches rectangulares de tamaño variable aplicado , en varias capas.En el proceso de diseño las dimensiones de cada parche se ajustan independientemente de tal modo que …
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"I Can Haz Applicants": An Analysis of Police Recruitment and Marketing Through Social Media
<p>In recent decades, the Internet has flourished with the advancement of social media: apps, blogs, social networking, multimedia sources, podcasts, and more. Consequently, the Millennial Generation has grown up immersed in both the Internet and social media networks differently than previous …
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Relación anatómica entre dientes posterosuperiores y seno maxilar utilizando tomografía computarizada de haz cónico
Radiografía Computarizada de Haz Cónico Cirugía Bucal Radiografía Dental Digital Piso Seno Maxilar Ápices radiculares dientes posterosuperiores CBTC Radiografía dental 3D Raíces de dientes posterosuperiores Relación vertical entre ápices Cone beam
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Cambios esqueléticos, dentoalveolares y dentales tras MARPE. Evaluación mediante Tomografía Computerizada de Haz Cónico
… evaluados con Tomografía Computerizada de Haz Cónico (CBCT, por sus siglas en inglés Cone Beam Computed Tomography). Así mismo, evaluar del componente verdaderamente esquelético que ofrece este tratamiento en estos pacientes o si por el contrario es más dentoalveolar y dentario, limitando …
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Grain Boundary Character Distribution in the HAZ of Friction Stir-Processed Al 7075 T7
The heat affected zone (HAZ) of friction stir welded Al 7075 T7 shows diminished corrosion resistance properties when compared with the parent material. Corrosion attack in this region of the weld is primarily intergranular and is associated with the presence of precipitate free zones. Current TEM …
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Propiedades magnéticas de nanoestructuras fabricadas sobre áreas grandes mediante procesos de autoorganización y litografía por haz de electrones
Los sistemas con anisotropía magnética perpendicular (PMA) presentan un gran interés en áreas como los medios de almacenamiento de la información, o la espintrónica. El control de sus propiedades ha promovido su nanoestructuración, centrándose inicialmente en materiales con una fuerte componente …
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A Correlation of Microstructure With Hot-Ductility in the Heat-Affected Zone of Inconel 718.
… fusion zone or in the weld heat-affected zone (HAZ). The objective of this study was to obtain a better understanding of hot cracking in the weld HAZ by making a correlation between the HAZ microstructure and the HAZ hot-ductility.
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Phase transformations in welded supermartensitic stainless steels
… on the behaviour of the heat-affected zone (HAZ). The microstructure of the HAZ in these new materials has, until now, received little attention. The work presented in this thesis is concerned with the experimental study of the microstructure developing in the HAZ of a range of …
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Stunting in pre-school and school-age children in the Peruvian highlands and its association with Fasciola infection and demographic factors
… recorded and used to calculate height for age (HAZ) Z scores. Three thousand children participated in the study. Nine percent (264) of children had at least one positive test for Fasciola infection, 6% (164) had chronic fascioliasis, and 3% (102) had only positive antibody tests. The median HAZ …
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Efeito da soldagem com dupla camada na microestrutura e dureza da zona termicamente afetada do aço 9%Ni
This work evaluated the HAZ of the 9%Ni steel through the Higuchi Modified Technique, which defines selection criteria for welding parameters for double layer from the microstructural results of HAZ of a welding by simple deposition. The aim of the technique is to find a combination of parameters …
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Modeling of Steel Laser Cutting Process Using Finite Element, Machine Learning, and Kinetic Monte Carlo Methods
… learning method to predict heat-affected zone (HAZ) and kerf, the key features in the laser cutting process; and (3) employ kinetic Monte Carlo (kMC) simulation to simulate the resultant microstructures in the laser cutting process. Specifically, in the finite element model, a laser beam was …
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Modelado, simulación y diseño de diodos láser de alto brillo
… presentan un brillo y una calidad de haz superiores a otros láseres de semiconductor de potencia, pero su funcionamiento complejo hace conveniente la utilización de herramientas de simulación en el proceso de optimización. Se ha profundizado en la comprensión del funcionamiento global …
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Formación de costras en la tostación de sulfuros de zinc
… Además, se realizó una simulación de un haz de refrigeración obtenida en un paquete de software de análisis y su resolución por elementos finitos. La revisión bibliográfica realizada registró que no hay estudios profundos relacionados con el desarrollo de soluciones al problema de …
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Evaluation of Cold Spray Process for Solid-State Welding
… A significant concern is the heat-affected zone (HAZ), which often becomes softer than its surrounding areas. To address this problem, the expansion of cold spray process—a solid-state layer-by-layer high speed particle deposition process—as an alternative solid-state welding technique is …
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Análisis estadístico de superficies reflectantes, no ideales, a efectos de conocer la distribución espacial de la energía solar reflejada
… en superficies especulares, concentrando el haz solar sobre un receptor donde se efectúa la transformación de la energía electromagnética. Esta tesis investiga sobre la distribución energética del haz solar concentrado en función de un análisis estadístico de las variables que intervienen en …
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Effect of residual stress gradients in austenitic stainless steels on stress corrosion cracking
… Compressive stresses developed in the HAZ of the specimen and in regions away from the HAZ stress free values were obtained. The magnitude of the stress gradient decreased as the peak temperature attained during simulated welding decreased. Transgranular cracks were observed in the …
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Putting teeth into the developmental origins hypothesis: A longitudinal study of early childhood malnutrition, enamel hypoplasia and adolescent health in Amazonian Bolivia
… stunted growth (height-for-age z-scores, HAZ), underweight (weight-for-age z-scores, WAZ), anemia (hemoglobin), immune activation (c-reactive protein) and parasitic gastrointestinal infection (hookworm infection). Adolescent outcomes (10-17 years of age) were collected in 2015 and included …
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The influence of environmental temperature on the thermal tolerance of Antarctic notothenioid fishes
… in the high-latitude High Antarctic Zone (HAZ), the lower-latitude Seasonal Pack-ice Zone, and cold-temperate waters of southern South America and the South Island of New Zealand. However, the extent to which regional differences in ice abundance and temperature affect the thermal tolerance …
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Thermoplastic bonding of microfluidic substrates
… resulting in asymmetric heat affected zones (HAZ). Welding fixture sensitivities may be engineered to tune the weld energy required and a desired HAZ bias to reduce microfluidic channel deformation. Energy imparted by resistively heating thin implants can be easily measured and observed. …
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The effect of weldable primer Paint thickness on weld quality and geometry
… considerably higher DFT. Weld-through primer and HAZ area, showed a possible relationship. The samples where the paint was mechanically removed seemed in some cases to produce larger HAZ areas. It was concluded that the primer may limit the spread of heat, resulting in a smaller HAZ. The analysis …
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