Stays at other universities

Multidimensional modeling is the main characteristic of OLAP tools. It is an analysis technique that helps to understand data by considering it in a multidimensional space (also known as cube or hypercube). The dimensions of this space are the different points of view we are going to use to analyze data. During my stay at Universidad de Granada I studied existing multidimensional data models, and how representing semantics could be improved by using Object-Oriented (specifically UML) concepts.

The stays were paid with a travelling grant from Generalitat de Catalunya.

Multitable joins is an important topic when talking about relational data warehouse schemas. These use to be star schemas were the central fact table has to be joined with the surrounding dimension tables. Due to the size of the fact table it is not feasible to sort neither partition it. Therefore, successive nested loop joins have to be performed (if there is not indices). During my staiy at Technische Universität Darmstadt I studied algorithms to reduce the cost of the successive nested loops by pipelining the fact table through the dimension tables, which results in a reduction in the number of steps. In the best case, all the dimension tables can be placed in memory at the same time and only one step is needed, avoiding the intermediate storage in between steps.

The stay was paid with a travelling grant from Generalitat de Catalunya.

I was working in a project in the Universidad Técnica Federico Santa María (Chile) with an INTERCAMPUS grant.

• Java 1.1.3 networking features (brief overview)
• Java 1.1 Networking
• Informe de la actividad realizada en el marco del Programa de Cooperación Interuniversitaria/E.AL.97 en la plaza 0560
• All source files, makefiles and html pages in tar-gzip format

I coursed my final year degree at the University of Bath (UK) as an ERASMUS student.

• First Term
  • Advanced Computer Graphics
  • Computer Algebra
  • Safety-Critical Systems
  • Software Techniques
• Second Term
  • Computer Vision
  • Networking
  • Final Project (JAVA demonstrations)
• Third Term
  • Examinations