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Christos Pantos, Hanno Hildmann and João Valente
This study aims to explore the communication capabilities for video crucial applications of two commercial drones?the Parrot AR.Drone 2.0 and the Parrot Anafi?in a greenhouse environment. Experiments were conducted on Received Signal Strength (RSS), Roun...
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Niels Anders, João Valente, Rens Masselink and Saskia Keesstra
Digital Elevation Models (DEMs) are 3D representations of the Earth?s surface and have numerous applications in geomorphology, hydrology and ecology. Structure-from-Motion (SfM) photogrammetry using photographs obtained by unmanned aerial vehicles (UAVs)...
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João Valente, Juan Jesús Roldán, Mario Garzón and Antonio Barrientos
This paper presents a novel tool capable of collecting thermal signatures inside a building by using low-cost IR temperature sensors mounted on-board an aerial platform. The proposed system aims to facilitate the detection of heat loss inside buildings, ...
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Pablo R. Palafox, Mario Garzón, João Valente, Juan Jesús Roldán and Antonio Barrientos
Autonomous takeoff, tracking, and landing maneuvers on a moving target with application to a fleet of robots with aerial and ground vehicles that need to operate for extended periods of time, as in Search and Rescue tasks.
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Miguel Valente, Hélio Silva, João M. L. P. Caldeira, Vasco N. G. J. Soares and Pedro D. Gaspar
This work is a part of an ongoing study to substitute the identification of waste containers via radio-frequency identification. The purpose of this paper is to propose a method of identification based on computer vision that performs detection using ima...
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Jéssica Morais da Silva,Maria do Bom Conselho Lacerda Medeiros,João Tiago Correia Oliveira,EriKa Valente de Medeiros,Cristina Maria de Souza-Motta,Keila Aparecida Moreira
Pág. 290 - 300
Different responses are observed in plants after infection by pathogens. The usage of systemic inducers, whether biotic or abiotic, has the function to increase the enzymatic production of the plant defense system. In that sense, our prese...
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Waldenei Travassos de Queiroz,Marcelo Lúcio Silva,Fernando Cristovam Silva Jardim,Rodrigo Vale,Mário Diego Rocha Valente,João Pinheiro
Pág. 47 - 59
Este trabalho avaliou, a partir das análises de componentes principais e de fatores, a aplicabilidade do modelo linear IVI = a1Ar + a2Dr + a3Fr para obter índices de valor de importância (IVI) para espécies arbóreas, em que Ar é a abundância relativa, Dr...
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João Marcelo Robazzi Bignelli Valente Aguiar, Emerson Ricardo Pansarin
Nectar is the most common resource offered by orchid flowers. In some cases, flowers reabsorb nectar as part of a resource-recovery strategy. Nectar is present only in the morning in the widespread orchid Oececoclades maculata (Lindl.) Lindl. To determin...
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