Recently published by Clarivate Analytics, in this year´s edition of the Highly Cited Researchers list, and for the second time, IT has two of its researchers among the “World´s most influential Scientific Minds”. This year, Mário Figueiredo, who has been a “regular presence” for the last five years, is once again accompanied by José Bioucas-Dias, whose first appearance on the list was in 2015.
Although they are classified in different areas, Geosciences in the case of José Bioucas-Dias and Engineering in the case of Mário Figueiredo, both are part of the Pattern and Immage Analysis group from IT in Lisbon, having already participated in several projects together.
Mário Figueiredo has become a world reference in the research field of image reconstruction computational techniques, relevant to areas such as magnetic resonance imaging for medical diagnosis, or to satellite images. The articles that most contribute to his regular appearance in this listing focus on the development of algorithms that allow solving problems of restoration or reconstruction of signals and images, such as noise removal, restoration of blurred images, etc.
The processing of multiband images (eg. pairs of interferometric radar images and hyperspectral images), obtained from satellite or in the laboratory, have been the focus of José Bioucas-Dias. His research aims to restore or reconstruct high quality images from low quality versions, through processing algorithms. In interferometric radar applications, he has developed algorithms that reconstruct 3-D terrain altitude maps from pairs of radar images acquired by a satellite. In the case of hyperspectral images (images with hundreds or thousands of colors), the algorithms developed by the IT researcher allow, for example, to check which compounds are inside a tablet, to detect certain pathologies or to identify materials accurately. "The scientific innovation resides fundamentally in the models used to formulate the problems of restoration and reconstruction and in the algorithms to estimate the original images", explains Bioucas-Dias.
The list of researchers who are influencing world science focuses only on the highly cited articles, which represent 1% of what is published worldwide in 21 scientific fields. There are 14 Portuguese researchers to appear among the 4000 scientists included in this list, which includes 17 Nobel Prize winners.
Photo credits: Débora Rodrigues/Técnico
João Jaime, Ivo Sousa, Paula Queluz and António Rodrigues, from the Radio Systems group, IT in Lisbon, won the Best Paper Award for their paper "Planning a Smart City Sensor Network on LoRaWAN Technology”, in the 21st Symposium in Wireless Personal Multimedia Communications (WPMC 2018).
“This work addresses a smart city design, namely the planning of a wireless telecommunication system based on LoRaWAN technology for the project “SmartCity Abrantes”. First, an assessment of the availability of fixed sensors is performed, followed by a study of the introduction of a new gateway on the system, in order to address coverage problems that were found. Afterwards, mobile sensors are considered, which can move within the whole area of Abrantes’ municipality, and a geographic coverage assessment is performed. Besides pointing out which challenges can be found when planning a LoRaWAN based network, the design and assessment steps shown herein also serve as a guide for similar wireless IoT projects”, explained Ivo Sousa.
Inaugurated in 1998, as a global platform to enable collaboration in the field of wireless information, WPMC is a unique global conference dedicated to wireless multimedia convergence. Held in Chiang Rai, Thailand, the theme of this year’s conference was “Body and Mind Integration through Information and Communication Technology”.
Photo: Ivo Sousa receiving the certificate for the Best Paper Award during the Award Banquet