2019
Authors
Mendes, JM; dos Santos, FN; Ferraz, NA; do Couto, PM; dos Santos, RM;
Publication
JOURNAL OF INTELLIGENT & ROBOTIC SYSTEMS
Abstract
Placing ground robots to work in steep slope vineyards is a complex challenge. The Global Positioning System (GPS) signal is not always available and accurate. A reliable localization approach to detect natural features for this environment is required. This paper presents an improved version of a visual detector for Vineyards Trunks and Masts (ViTruDe) and, a robot able to cope pruning actions in steep slope vineyards (AgRob V16). In addition, it presents an augmented data-set for other localization and mapping algorithm benchmarks. ViTruDe accuracy is higher than 95% under our experiments. Under a simulated runtime test, the accuracy lies between 27% - 96% depending on ViTrude parametrization. This approach can feed a localization system to solve a GPS signal absence. The ViTruDe detector also considers economic constraints and allows to develop cost-effective robots. The augmented training and datasets are publicly available for future research work.
2019
Authors
Talari, S; Shafie Khah, M; Chen, Y; Wei, W; Gaspar, PD; Catalao, JP;
Publication
IEEE TRANSACTIONS ON SUSTAINABLE ENERGY
Abstract
In this paper, a new methodology to unleash the potential of demand response (DR) in real-time is presented. Customers may tend to apply their DR potential in the real-time market in addition to their scheduled potential in the day-ahead stage. Thus, the proposed method facilitates balancing the real-time market via DR aggregators. It can be vital, once the stochastic variables of the network such as production of wind power generators do not follow the forecasted production in real-time and have some distortions. Two-stage stochastic programming is employed to schedule some DR options in both day-ahead and real-time markets. DR options in real-time are scheduled based on possible scenarios that reflect the behaviors of wind power generation and are generated through Monte-Carlo simulation method. The merits of the method are demonstrated in a 6-bus case study and in the IEEE RTS-96, which shows a notable reduction in total operation cost.
2019
Authors
Pimentel, AP; Schneider, D; Oliveira, L; de Souza, J; Correia, A; Motta, C;
Publication
PROCEEDINGS OF THE 2019 IEEE 23RD INTERNATIONAL CONFERENCE ON COMPUTER SUPPORTED COOPERATIVE WORK IN DESIGN (CSCWD)
Abstract
In recent years, social curation technology has been successfully promoted as a means of addressing the problem of involving citizens with news content. Sites like Facebook, Reddit and Storify, just to name a few, allow their users to discuss, comment, share, identify and review news content from various sources. A key goal of this paper is to analyze the process of social validation in the context of Acropolis, a social computing platform that allows citizens to build and share their own narratives about complex or long-term news stories. The sense of social validation determines an increase in self-esteem, self-confidence, and instant happiness, when conveniently engendered in virtual environments.
2019
Authors
Guerreiro, A; Apolinario, A; Lopes, A; Hierro Rodriguez, A; Aguilar, G; Baptista, JM; Silva, NA; Frazao, O; Quiterio, P; Jorge, P; Rodrigues, P; Moraes, SS; Silva, S; Ferreira, TD; Santos, JL; Araujo, JP;
Publication
FOURTH INTERNATIONAL CONFERENCE ON APPLICATIONS OF OPTICS AND PHOTONICS
Abstract
We present the design, fabrication and optical characterization of functional metamaterials for optical sensing of Hydrogen based on inexpensive self-assembly processes of metallic nanowires integrated in nanoporous alumina templates([37-42]). The optical properties of these materials strongly depend on the environmental concentration or partial pressure of hydrogen and can be used to develop fully optical sensors that reduce the danger of explosion. Optical metamaterials are artificial media, usually combining metallic and dielectric sub-wavelength structures, that exhibit optical properties that cannot be found in naturally occurring materials. Among these, functional metamaterials offer the added possibility of altering or controlling these properties externally after fabrication, in our case by contact with a hydrogen rich atmosphere. This dependency can be used to design([43-45]) and develop optical sensors that respond to this gas or to chemical compounds that contain or release hydrogen. In this paper we present some designs for hydrogen functional metamaterials and discuss the main parameters relevant in the optimization of their response.
2019
Authors
Arandas, Luis; Gomes, José Alberto; Bernardes, Gilberto; Penha, Rui;
Publication
Proceedings of the 7th Conference on Computation - Communication Aesthetics & X - XCOAX 2019
Abstract
Never The Less is a live audio-visual (A/V) networked performance, where participants are able to interact remotely and collaboratively. It adopts the newly-proposed web-based A/V Akson system, designed for an internet infrastructure, which allows both musical and visual content generation and interaction across multiple devices in remote locations. The system was built with great emphasis on live-performance and human collaboration, where experts and non-experts (i.e., artists and public) exist at the same level.
2019
Authors
Barreto, L; Amaral, A; Baltazar, S; Rocha, C;
Publication
PROCEEDINGS OF THE 4TH INTERNATIONAL CONFERENCE ON ENERGY & ENVIRONMENT (ICEE 2019): BRINGING TOGETHER ENGINEERING AND ECONOMICS
Abstract
Along with the social evolution concept and the environmental concerns, the use of active transport modes is a suitable solution to face this new reality. Therefore, the cultural shift needed in order to promote the use of active modes, the use of bicycles as a viable transport mode, and the understanding of its impacts and characteristics becomes a present priority and concern. Based on the actual bicycle panorama and the Portuguese cycling strategies and guidelines, the GetGreen Company data, in the scope of the EducaBicla Program case study, is analysed and a future pathway is outlined. This study allows to create a sensitivity perception of the relation between the daily use of bicycles as a transport mode and its promotion among young ages population, i.e. the impact on sustainable and healthy daily mobility choices after having the knowledge provided by teaching/learning bicycle programs such as EducaBicla. In this paper are identified the main features/characteristics to be considered when implementing a bicycle teaching/learning project, ensuring progress towards the use of active, healthy and sustainable mobility modes; the appropriated age to start this program; and how this program can be expanded.
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