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Planning and controlling autonomous vehicles requires one to be aware of the state of the vehicles and their configurations, the state of environment (obstacles, weather conditions), account for possible changes in mission requirements as well as hardware failures. Operations with multiple autonomous vehicles pose advantages in many scenarios but complicate even further the job of the human operator...
Mission planning and execution for autonomous vehicles is crucial for their effective and efficient operation during scientific exploration, or search and rescue missions, to mention a few. Automated Planning has shown to be a useful tool for “high level” mission planning, that is, allocating tasks to vehicles while following given constraints (e.g., energy, collision avoidance). In this paper, we...
The paper describes the seventh edition of Rapid Environmental Picture Atlantic exercise (REP16-Atlantic) which took place in July 2016 along the coast of Sesimbra and Troia, Portugal. The intent was to demonstrate coordinated operations of unmanned underwater, surface, and air vehicles contributed by participants coming from different European institutions from both research and industry fields....
Networked vehicle systems are composed of nodes possessing distinct physical and computational capabilities and interact with each other over a time-varying communications topology. The resulting dynamic structure delivers novel system-level properties that can not be found in the constituent nodes. In this paper we document a series of technological achievements which allowed the concretization of...
Design of simple and efficient routing protocols for underwater acoustic sensor networks is a difficult subject because they have to cope with the challenging and variable characteristics of the water medium. With the participation of autonomous underwater vehicles in underwater networks, mobility has become a more important matter to deal with in protocol design. Adding to that, it is also not common...
In this paper we present the NECSAVE system which allows the control of heterogeneous unmanned vehicles under challenging environments by a single human operator by providing it with the desired highlevel objectives. The described software stack takes care of decomposing the high-level objectives into assignable tasks and (re)distributing the workload among team members according to their announced...
In order to further expand the sustainability of maritime operations the use of autonomous vehicles has been employed at an increasing scale. This natural increase comes not only in the form of the multiplication of the numbers of the same vehicle model, but also in diversifying the vehicle composition setup in order to allow the exploitation of different types of payloads. Moreover, this use of heterogeneous...
Transposable Elements are DNA sequences that can move from one place to another inside the genome of a cell. They are important for genetic variability, and can modify the functionality of genes. The correct classification of these elements is crucial to understand their role in the evolution of species. In this paper, we investigate Transposable Elements classification as a Hierarchical Classification...
This paper presents an efficient and accurate methodology for the layered media Green's function evaluation in fully 3D electromagnetic scenarios such as of IC packages and printed circuit boards.
The paper describes the sixth edition of Rapid Environmental Picture Atlantic exercise (REPIS-Atlantic) which took place in July 2015 off the Portuguese islands of Azores to demonstrate coordinated operations of unmanned underwater, surface, and air vehicles contributed by participants coming from Europe and the United States of America. REP-Atlantic is a yearly demonstration exercise targeted at...
We often take Web connectivity for granted. This can be the case in our houses where we rely on more and more devices that connect to the Internet and exchange information with remote servers or other nearby devices around using cheap Wi-Fi radios. However, the world remains for the most part disconnected. There are still uncountable remote areas where connecting to the Internet is still a big challenge...
Elevation data is very important for precise electric vehicle simulation. However, traffic simulators are often strictly two-dimensional and do not offer the capability of modelling urban networks taking elevation into account. In particular, SUMO — Simulation of Urban Mobility, an often used microscopic traffic simulation platform, relies on urban networks previously modelled with elevation data...
Recently, many studies in the literature have been intensified in the scope of mobility services, presenting new technological solutions that can minimize problems, such as traffic congestion and the emission of greenhouse gases resulting from the population growth in large cities. Some services, namely shared services, are mainly dedicated to trying to encourage people to use transport that can be...
Virtual Worlds are designed for sociability, environments where people have interaction with other people. Enterprises have already started exploring this new world as a way to provide a compelling new value proposition to their products and services. This paper makes a proposal for addressing the issue of interoperability between virtual and real-world business environments as a way to foster value...
Supervision and control of Autonomous underwater vehicles (AUVs) has traditionally been focused on an operator determining a priori the sequence of waypoints of a single vehicle for a mission. As AUVs become more ubiquitous as a scientific tool, we envision the need for controlling multiple vehicles which would impose less cognitive burden on the operator with a more abstract form of human-in-the-loop...
Wind power production is uncertain. The imbalance between power committed and delivered on pool markets produces increased costs on the system, which must be paid by defaulting producers, decreasing their revenues. In order to invert this situation wind producers may submit their bids join with hydro resources, due to their availability. This paper proposes an optimization technique regarding the...
Obtaining synoptic observations of dynamic ocean phenomena such as fronts, eddies, oxygen minimum zones and blooms has been challenging primarily due to the large spatial scales involved. Traditional methods of observation with manned ships are expensive and, unless the vessel can survey at high-speed, unrealistic. Autonomous underwater vehicles (AUVs) are robotic platforms that have been making steady...
This paper describes the open-source software toolchain developed by the Underwater Systems and Technology Laboratory (LSTS) for supporting networked heterogeneous air and ocean vehicle systems. The toolchain supports the deployment of air and ocean vehicles interacting over limited acoustic and wireless networks combined with disruption-tolerant networking protocols. We present the different components...
This paper presents the LAUV (Light Autonomous Underwater Vehicle), with special emphasis on the most recent developments and discusses how the LAUV enables networked operations. The LAUV is a lightweight, one-man-portable vehicle specially designed to be a highly operational and effective surveying tool for oceanographic, hydrographic, security and inspections applications. The LAUV is evolving rapidly...
This paper describes scientific and engineering efforts towards remote sensing, tagging and continuous tracking of sunfish specimens (Mola mola, world largest bony fish) in the open sea.
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