La estimación de precios es un proceso crítico para la elaboración de presupuestos en compañías que tienen que competir para obtener pedidos ofreciendo precios competitivos. En concreto, las compañías de mecanizado de piezas, dicho proceso es complejo, pues se pueden…

The original idea of this research was the disigning, evaluating and applying of an interactive material that could help our �Sports Initiation II� students to achieve the required knowledge of an adapted sport like the mini handball. Guidelines established in…

El diseño de la instrucción asistida por ordenador es un proceso complejo que requiere tanto del diseño del proceso instructivo como de la elaboración de un producto informático acorde al mismo. Fruto de esta dificultad ha surgido una línea de…

Este trabalho visa determinar as atitudes e nível de conhecimento dos educadores de infância, professores do ensino básico e secundário em relação ao abuso de crianças, para determinar a prevalência de sinais de abuso identificadas nos alunos, conhecer o seu…

This study is based on three premises: 1) science is a discourse; 2) linguistic and pictorial representational systems are not equivalent, but complementary; 3) external pictorial representation are full of content but the relationship between Sign and Referent is abstract…

Some applications such as radio astronomy and deep space communications require very sensitive receivers. This dissertation deals with the cryogenic technology applied to the microwave engineering and focuses on the design of very low noise amplifiers both in hybrid (MIC)…

Eighty years after the discovery of penicillin, the interest of this ß-lactam antibiotic at industrial level is still remarkable. Despite the good background knowledge, little is known on how Penicillin chrysogenum became a good penicillin overproducer, and much of the…

Gran parte de las infraestructuras del transporte precisan de estructuras tipo túnel, como por ejemplo en las grandes ciudades, donde la escasez de espacio las hace indispensables o cuando se quieren salvar obstáculos naturales como cadenas montañosas o el mar.…

Resource management and performance models constitute important aspects for parallel applications' performance analysis and tuning. Defining performance models associated with the application structure has been proven useful for implementing dynamic tuning tools. However, for extending this strategy to complex pplications…

Understanding how materials deform and break is a subject of critical importance in industry. At the same time, it requires from the knowledge of the basic processes governing the phenomenon and hence, fundamental physics research is a must. The presence…