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Showing 1 to 20 of 20 for “"balsa"”.
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Transporte de estruturas offshore sobre balsa
This work deals with the structural behaviour of offshore structures like jacket and deck during transportation on deck barges. Initially, a theoretical basis related to this kind of problem is presented. The analyses, founded in a probabilistic theory, were performed considering 5 sets of …
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Debond Buckling of Woven E-glass/Balsa Sandwich Composites Exposed to One-sided Heating
… weave E-glass/epoxy facesheets and an end-grain balsa wood core manufactured using the Vacuum Assisted Resin Transfer Molding (VARTM) technique were the only materials analyzed. These were selected due to their current use in naval vessels and the heightened interest in the fire response …
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Behavior and Flexure Analysis of Balsa Wood Core Sandwich Composites: Experimental, Analytical and Finite Element Approaches
… bending with glass phenolic facings and balsa wood core is being investigated under room and elevated temperatures. Test data on bending rigidity, critical interfacial failure (skin-to-core interface) and shear stress are collected and analyzed. The load-deflection curves plots up to the …
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An analysis of Pre-Columbian balsa raft design to determine the suitability of such rafts for ancient maritime trade between Ecuador and Mexico
… in large, ocean-going sailing rafts made of balsa logs. By about 700 CE the data show that Ecuadorian metalworking technology had reached the west coast of Mexico but remained absent in the intermediate region of Central America. Archaeologists have argued that this technology was most …
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Thermophysical Properties and Microstructural Changes of Composite Materials at Elevated Temperature
… E-glass vinyl ester laminates and end-grain balsa wood core. The simultaneous DSC/TGA was used to measure the apparent specific heat required to heat the decomposing sample. ESEM experiments captured microstructural changes during decomposition for both E-glass vinyl ester laminate and balsa …
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The Biology of Spaeroma Terebrans in Lake Pontchartrain, Louisiana with Emphasis on Burrowing
… were conducted using cypress, Styrofoam, and balsa. Results indicate that this population may be parthenogenic and that wood or material hardness determines whether S. terebrans burrow when given a choice of substrates. The lake shoreline near the Bonnet Carre Spillway is retreating and the …
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The use of cellular materials to alleviate the damage from blast-induced fragments
… include aluminium foam, aluminium honeycomb, balsa wood, Corecell M‐80 foam, Divinycell H200 PVC foam and rigid polyurethane 200 foam. The 40mm thick energy absorbing materials are 106mm in diameter (same size as the exposed plate area) are placed in front of the rear plate.
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Estudio de tratamientos pre-germinativos, crecimiento y rendimiento de Ochroma lagopus Sw. a nivel de vivero y plantación
… germinativos, crecimiento y rendimiento de la balsa Ochroma lagopus Sw en vivero y plantación definitiva, mediante la detenninación del mejor tratamiento pregerminativo, mejor enmienda orgánica, identificación de plagas y enfennedades, sobrevivencia en vivero y plantación definitiva; …
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Scaled electromechanical modeling of the F-35A Joint Strike Fighter
… was to make the airframe completely out of balsa wood,
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Optimizing the synthesis process of wood-derived biomorphic silicon carbide
… in the current methods. Four wood species (balsa, pine, maple and oak) offering a wide range of porosities were infiltrated with colloidal SiO₂ under varying pressure conditions, and the corresponding weight gains were recorded and studied. The samples were then fired at 1600 °C for 2h under …
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Investigación no invasiva para el estudio de los establecimientos rurales romanos en el litoral meridional hispano
… Baetica hemos seleccionado la ciudad romana de Balsa en el municipio de Tavira, en el Algarve portugués. En el extremo opuesto, los confines orientales, nos desplazamos hasta el yacimiento de Torregarcía, en la Bahía oriental de Almería. El mundo rural romano, complejo y diverso, no ha gozado, …
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Modification and Implementation of The Rpc Heterogeneous Thorax Phantom For Verification of Proton Therapy Treatment Procedures
… Units (HU) for lung equivalent materials (balsa wood and cork) was measured using a CT scanner. The relative linear stopping power (RLSP) of these materials was measured. The linear energy transfer (LET) of Gafchromic EBT2 film was analyzed utilizing parallel and perpendicular orientations …
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Effect Of Impact Damage On Compression-Compression Fatigue Behavior Of Sandwich Composites
… from E-glass/epoxy face sheets over end-grain balsa wood core. Low velocity impact tests were carried out using a drop-weight impact tower by impacting the sandwich beam at the center with energy level slightly higher than threshold energy level of 8.8 J. Edge-wise compression static tests were …
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Diseño e implementación de la base de datos para una aplicación de control de cambios
La finalidad de este proyecto es diseñar e implementar un sistema de Base de Datos para gestionar el proceso ITIL de gestión de cambios en aplicaciones informáticas para una empresa de desarrollo de software. Se considera que las aplicaciones existentes en el mercado son demasiado generalistas y …
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Economía monetaria de las áreas rurales de la Lusitania romana.
… y el Algarve (Los puertos de Osonoba y Balsa ligaban el sur de la Lusitania con el estrecho de Gibraltar). El trabajo está organizado de la manera siguiente: En primer lugar presentamos una parte teórica done hemos elaborado un estado de la cuestión sobre el uso de la moneda en las áreas …
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Origen y distribución de los sistemas progradantes en el Miembro Agua de la Mula (Hauteriviano). Cuenca Neuquina, Argentina
… 3) La Quebrada, 4) Jara, 5) Pichi Mula y 6) Balsa Huitrín. De modo adicional, en el flanco oriental del anticlinal Pichi Mula se relevaron cuatro secciones estratigráficas parciales que comprenden los últimos ~170 m del Miembro Agua de la Mula. A partir del análisis detallado de todas las …
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Durabilidad de morteros de cemento en contacto con purines de cerdo
… o pavimentos tanto continuos como discontinuos o balsas de almacenamiento de purines, de hormigón en masa o armado o incluso de fábrica de ladrillo con revestimiento de mortero. Todos estos elementos se encuentran en ambientes de diversa agresividad, tales como estiércoles, purines, productos de …
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Hidrogeología del sistema kárstico de La Fuentona de Muriel (Soria)
… de un futuro abastecimiento, utilizando varias balsas de regulación, para llenarlas con bombeos efectuados en “invierno”, durante las puntas de crecida o de caudales fuertes mantenidos de La Fuentona. Para ello se necesitaría una gran capacidad de extracción de agua subterránea en poco tiempo y …