Design and performance evaluation of turbo FDE receivers

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para obtenção do Grau de Mestre em Engenharia Electrotécnica e de Computadores

FEW phone file system

Trabalho apresentado no âmbito do Mestrado em Engenharia Informática, como requisito parcial para obtenção do grau de Mestre em Engenharia Informática

Ações encobertas

The global and increasingly technological society requires the States to adopt security measures that can maintain the balance between the freedom, on the one hand, and the security and the respect for fundamental rights of a democratic state, on the other. A State can only achieve this aim if it has an effective judicial system and in particular a criminal procedure adequate to the new criminogenic realities. In this context, the national legislator has adopted, following other international legal systems, special means of obtaining proof more stringent of rights. Within those special means are included the covert actions, that, being a means to use sparingly, is a key element to fight against violent and highly organized crime. Therefore, the undercover agent, voluntary by nature, develops a set of activities that enables the investigation to use other means of taking evidence and/or probationary diligences itself, with the purpose of providing sufficient proof to the case file. In this milieu, given the high risks involved during the investigation, as well as after its completion, the undercover agent can act upon fictitious identity. This measure can be maintained during the evidentiary phase of the trial. Similarly, given the latent threat that the undercover agent suffers by its inclusion in criminal organizations, as well as the need for his inclusion in future covert actions it is crucial that his participation as a witness in the trial is properly shielded. Thus, when the undercover agent provides, exceptionally, statements in the trial, he shall do so always through videoconference with voice and image distortion. This measure can guarantee the anonymity of the undercover agent and concomitantly, that the adversarial principle and the right of the accused to a fair trial is not prejudiced since, in those circumstances, the diligence will be supervised in its entirety (in the audience and with the undercover agent) by a judge.

Methodology for WSN communication technologies automated field tests

Wireless Sensor Networks(WSN) are networks of devices used to sense and act that applies wireless radios to communicate. To achieve a successful implementation of a wireless device it is necessary to take in consideration the existence of a wide variety of radios available, a large number of communication parameters (payload, duty cycle, etc.) and environmental conditions that may affect the device’s behaviour. However, to evaluate a specific radio towards a unique application it might be necessary to conduct trial experiments, with such a vast amount of devices, communication parameters and environmental conditions to take into consideration the number of trial cases generated can be surprisingly high. Thus, making trial experiments to achieve manual validation of wireless communication technologies becomes unsuitable due to the existence of a high number of trial cases on the field. To overcome this technological issue an automated test methodology was introduced, presenting the possibility to acquire data regarding the device’s behaviour when testing several technologies and parameters that care for a specific analysis. Therefore, this method advances the validation and analysis process of the wireless radios and allows the validation to be done without the need of specific and in depth knowledge about wireless devices.

O crime de condução perigosa de veículo rodoviário e a sua perceção pelos militares da GNR afetos a fiscalização rodoviária

The Republican National Guard has a core role concerning the security of Portugal’s roads since a significant part of them are under its responsibility. Dangerous driving is a crime that happens less times that other two crimes (driving without a license and driving under the influence), but it isn’t covered by the media like those two, much to the small number of reports written by the Security Forces. This work aims to approach the particularity of this crime given it poses a real threat and because its report requirements are far demanding. The thesis is divided in two parts. The first one develops the theory frame through the analysis of documents. The second part deals with the processing of fines from selected samples. The conclusion of this study states that there is a way of reducing situations that could result in this type of crime using fines. Other conclusion points to the fact that the time gap between the occurrence of the crime and a judge’s sentence is substantial, meaning that the military from the Republican National Guard often opt for the second option because the sentences and the security measures for this crime can often find parallel in other type of crimes. The about 200 sentences reached per day from courts all over the country when tied to the 700/800 criminal defenses mean that the National Authority for Road Security is overloaded with administrative work, which is a problem that could be surpassed with the implementation of a new document and a different access to the data of each driver through the National Authority for Road Security’s website.

Intrusion tolerant routing with data consensus in wireless sensor networks

Dissertação para obtenção do Grau de Mestre em Engenharia Informática

Unified cooperative location system

Dissertação apresentada na Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa para a obtenção do Grau de Mestre em Engenharia Informática.