Joaquim J. Sousa

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In this paper a hybrid approach is presented to design and implement a GSM digital down convertor for enhanced resource utilization. The proposed DDC has been implemented by hybridizing the multiplier less and multiplier based decimators. A multiplier less CIC decimator has been used to reduce the cost by reducing the multiplier requirement. Two(More)
This paper presents a methodology to quantify and to locate leaks. The original contribution is the use of a tool based on the TrustRank algorithm for the selection of nodes for pressure monitoring. The results from these methodologies presented here are: (I) A sensitivity analysis of the number of pressure transducers on the quality of the final solution;(More)
The need for real-time plasma position control on the ISTTOK tokamak led to the development of two similar 240 A:500 kA/s fast power supplies, for the vertical and horizontal magnetic equilibrium fields. This paper presents the design, the digital link, the modeling and operation of the vertical B-field power supply. It consists of a digital hard real-time(More)
This paper describes the design of a set of hypermedia tools intended to produce courseware to be used for individual or group learning in a cooperative way. The system was developed for the MS-Windows environment, supporting OLE (object linking and editing) technology. With OLE technology, the user does not have to leave an application to create or edit(More)
The quantification of low rate active tectonic structures is a major target of geodetic and geological studies to improve the knowledge of seismic hazards. The central Betic Cordillera (southern Spain) is affected by moderately active tectonic structures and seismicity. Part of this seismic activity is produced by several NW-SE normal faults located in the(More)
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