Now showing items 1820-1839 of 5496
Dumois González, Martha (Date of defense: 2016-01-13)
The problem of academic achievement on the basic concepts of mechanical physics in the preparatory course of Introduction to Physics, and attitude of students to the course are the triggers for this study, on the development ...
Cerda Troncoso, Jorge Francisco (Date of defense: 2013-02-20)
El tema de investigación de la tesis doctoral surge como consecuencia de una sucesión de investigaciones anteriores, en las cuales se ha construido y utilizado un concepto denominado “probabilidad funcional”, para explicar ...
López Montero, Teresa (Date of defense: 2018-06-19)
Asphalt mixtures cracking is one of the most common deterioration mechanisms in flexible pavements. This phenomenon is due to both the application of loads and the degradation of the material as a result of its exposure ...
Díaz Delgado, Nelson Gustavo (Date of defense: 2023-09-28)
(English) This thesis is focused on analysing the impact produced by washwater discharges from exhaust gas cleaning systems fitted on ships on the pH level of Barcelona port waters. These systems are being used on board ...
Suárez Pradilla, Mónica Marcela (Date of defense: 2016-09-13)
The aim of this research is to analyze the impact of the orbital motorway B-40 or fourth belt Barcelona in the polycentric urban structure of the Barcelona Metropolitan Region or (BMR). The changes discussed in this research ...
Rodríguez Ossadón, Paula (Date of defense: 2013-01-21)
Arencón Osuna, David (Date of defense: 2003-03-07)
Esta investigación pretende contribuir al conocimiento de las relaciones entre la microestructura, las propiedades y las condiciones del procesado de los materiales compuestos polipropileno-vidrio. El propósito fue el de ...
Mora Ortiz, René Sebastián (Date of defense: 2016-03-03)
The microstructure, understood as the distribution of pore sizes and their connectivity, is an important factor that affects the mechanical behaviour and the hydraulic properties of compacted soils with fine fraction (silts ...
Belmonte Molina, Aniceto (Date of defense: 1995-05-04)
El trabajo se divide en tres partes: 1) estudio sintético de las técnicas de calculo de los efectos de las fluctuaciones aleatorias del índice de refracción inducidas por la turbulencia atmosférica en la propagación de ...
Osorio Bustamante, Edison (Date of defense: 2012-12-14)
Durante un terremoto, las columnas de hormigón armado pueden verse sometidas a movimientos bidireccionales que pueden afectar su capacidad resistente y ductilidad. Sin embargo, las normas de diseño y evaluación sísmica no ...
Guasch Pesquer, Luis (Date of defense: 2006-01-15)
Este trabajo se enmarca dentro de la calidad del suministro de energía eléctrica y, en concreto, en el efecto que producen los huecos de tensión en las máquinas de inducción y en los transformadores trifásicos.<br/>En ...
Flórez Vergara, Alexy (Date of defense: 2008-02-08)
Asistimos en la actualidad a una constante pérdida de la diversidad genética de los cultivos. Paralelamente en muchas zonas del mundo, especialmente en los países más desarrollados, se produce una regresión de la agricultura ...
Martínez Torrents, Albert (Date of defense: 2015-03-17)
The contact ofthe spent nuclear fuel (SNF) with water dueto a failure in the canister would be a conservative but still plausible hypothesis in the safety assesment of a deep geologic repository (DGR). Concrete and ...
Lima, Marcos Natan da Silva (Date of defense: 2023-06-30)
(English) Pre-salt oil exploration means a new development path for Brazil. This activity stimulates investments from national and foreign companies, boosts the production of technology, promotes greater professional ...
Ávila Martín, Cristina (Date of defense: 2013-12-09)
Water of quality constitutes a scarce and essential resource for life and public health, and its sustainable management is of crucial importance. Thus, wastewater treatment, reuse and reclamation represent a key practice ...
Zhao, Zhitong (Date of defense: 2015-11-20)
From a chemical and structural point of view, hydroxyapatite (HA) is a strong candidate in biomedical applications owing to its similarity to the inorganic components of bones and teeth. HA nanoparticles (NPs) as colloidal ...
Sadowska, Joanna Maria (Date of defense: 2018-07-24)
Bone has a natural ability to regenerate. However, it cannot bridge large defects without the additional help of a supporting material. Among the different synthetic bone grafts, calcium phosphates (CaPs) are excellent ...
Barbieri, Manuela (Date of defense: 2011-07-22)
La recarrega artificial de les aigües subterrànies consisteix en infiltrar aigua als aqüífers per mitjà de les instal·lacions dissenyades per a tal fi i representa una eina important en la gestió dels recursos. A més de ...
Villarraga Díaz, Claudia Juliana (Date of defense: 2018-02-28)
The environmental conditions may play a relevant role in the stability of rock slopes. In fact, weathering can contribute to the reduction of strength of the material, while atmospheric actions may increase internal stresses ...
Olvera, Caludia (Date of defense: 2019-09-17)
Science and Technology Parks (STPs) facilitate the flow of knowledge and technology among universities; R&D institutions; companies and markets, and foster the creation and growth of innovation-based companies. Among the ...