Tiago Alves

Fundação Calouste Gulbenkian

Public transportation services are essential to any metropolitan area. To meet the rising passenger demand, emergent and disruptive technologies have been used for the railway sector. This paper assesses the maintenance crew scheduling problem and presents a mathematical programming model which optimizes the daily scheduling of technicians in a rai...

Railways play a pivotal role in transportation systems worldwide. Effective maintenance policies are crucial to guarantee the reliability and availability of such systems inserted in a challenging and competitive environment. In this scenario, condition-based and predictive maintenance strategies emerge as key components of the European rail traffi...

In recent years, the use of Public Service Obligations (PSOs) in air transport policy has substantially increased. In remote regions, where air transport services are not profitable, the application of this subsidy program is crucial for the economic and social development of these regions. However, there is a great diversity in the provision of PS...

This paper presents a mathematical programming model that optimizes the daily schedule of maintenance technicians in a railway depot. The aim of the model is the minimization of the associated labor costs, while assigning the different technicians and skills required for each maintenance task. A case study of a Portuguese train operating company is...

Background and objective: The volume of biomedical literature has been increasing in the last years. Patent documents have also followed this trend, being important sources of biomedical knowledge, technical details and curated data, which are put together along the granting process. The field of Biomedical text mining (BioTM) has been creating sol...

The rapidly increasing popularity of WiFi has created unprecedented levels of congestion in the unlicensed frequency bands, especially in densely populated urban areas. This results mainly because of the uncoordinated operation and the unmanaged interference between WiFi access points. In this context, the main objective of this experiment is to as...

Biomedical literature is composed of an ever increasing number of publications in natural language. Patents are a relevant fraction of those, being important sources of information due to all the curated data from the granting process. However, their unstructured data turns the search of information a challenging task. To surpass that, Biomedical t...

The growth of social media and user-generated content (UGC) on the Internet provides a huge quantity of information that allows discovering the experiences, opinions, and feelings of users or customers. These electronic Word of Mouth statements expressed on the web are prevalent in business and service industry to enable a customer to share his/her...

Comunicação póster apresentada em congresso internacional.

Security requirements for embedded systems such as consumer devices are becoming stronger. Current designs need an isolated environment that stores and processes sensitive data. New hardware technologies are arriving that provide low-cost, high-performance, isolated environments. Standard open APIs are providing a route to interoperability, defragm...