Examinando por Autor "Legarda Macon, Jon"

Mostrando 1 - 4 de 4
  • Miniatura
    Ítem
    2 × 2 textile rectenna array with electromagnetically coupled microstrip patch antennas in the 2.4 GHz WiFi band
    (MDPI AG, 2021-06-17) López Garde, Juan Manuel ; Río Ruiz, Rubén del; Legarda Macon, Jon; Rogier, Hendrik
    The development of e-textiles is fostering research in wireless energy transmission. This paper presents a purely textile 2.4 GHz WiFi band 2 × 2 rectenna array for RF energy harvesting. It utilizes the electromagnetically coupled microstrip patch antenna topology and a simple and precise construction method that provides a good performance repeatability to create multilayer microstrip textile patch antennas. The rectifier is implemented with Schottky diodes and it takes the voltage doubling configuration. An average DC power of 1,1 mW was measured for 14 µW/cm2 of RF input power density, while the end-to-end average power conversion efficiency (PCE) measured was 31%. The characterization of the end-to-end PCE was evaluated considering the physical size of the prototype to make the comparison with other designs easier. Measurements in a real WiFi scenario were also performed, demonstrating its feasibility for feeding e-textiles.
  • Miniatura
    Ítem
    Blockchain application in P2P energy markets: social and legal aspects
    (Taylor and Francis Ltd., 2022-03-08) Borges Hernández, Cruz E. ; Kapassa, Evgenia ; Touloupou, Marios ; Legarda Macon, Jon ; Casado Mansilla, Diego
    Flexible and distributed energy markets are a reality that is progressively reaching many regions. Despite their clear benefits, they should be accepted by the prosumers. Additionally, blockchain technology and smart contracts have been characterised as a technological enabler for the energy sector and P2P Energy Markets (PEM). However, little research has been done to explore blockchain's user-centred perspective. Therefore, this paper analyses the reluctance and/or concerns of prosumers regarding smart contracts, and investigates their perception on blockchain within PEMs. The authors present the results of a survey conducted across several European countries addressing the implementation of automated trading systems and analysing the adoption of smart contracts. Considering that the main survey outcomes are related to the regulation and legislation uncertainty around blockchain usage, this paper explores also the fit of smart contracts from a legal perspective. Additionally, a set of recommendations to be used as the basis for the design and development of PEMs is delivered, aiming to adopt blockchain and smart contracts. As a key take-away, the authors confirm the crucial role that blockchain will play in the deployment of fair, secure, flexible and distributed energy markets by ensuring transparency in the exchange of information between prosumers and energy stakeholders.
  • Miniatura
    Ítem
    Is a massive deployment of renewable-based low voltage direct current microgrids feasible?: converters, protections, controllers, and social approach
    (Elsevier Ltd, 2022) Castillo Calzadilla, Tony; Cuesta, M. A.; Quesada Granja, Carlos; Olivares-Rodríguez, Cristian; Macarulla, Ana María; Legarda Macon, Jon; Borges Hernández, Cruz E.
    The main objective pursued by this survey is to debate the feasibility of a new distribution system in low voltage direct current (LVDC) microgrids and its impact on social development. To this end, this study provides valuable information for renewable energy planners and researchers, giving insights or solutions to reduce the transition gap between the current energy network and the future DC energy microgrids. Mainly, this article is divided into interlinking converters, protection schemes, and control systems, which have been analyzed taking into account the technical aspects of an LVDC microgrid as well as the social impact they have in poverty areas. This survey studies how low voltage DC networks can produce social welfare. In short, this paper assess social implications and technical issues, such as low inertia, grounding issues, voltage regulations, arc apparition, etc., providing a different approach to overcome these issues.
  • Miniatura
    Ítem
    A taxonomy of food supply chain problems from a computational intelligence perspective
    (MDPI, 2021-10-18) Angarita Zapata, Juan S. ; Alonso Vicario, Ainhoa; Masegosa Arredondo, Antonio David ; Legarda Macon, Jon
    In the last few years, the Internet of Things, and other enabling technologies, have been progressively used for digitizing Food Supply Chains (FSC). These and other digitalization-enabling technologies are generating a massive amount of data with enormous potential to manage supply chains more efficiently and sustainably. Nevertheless, the intricate patterns and complexity embedded in large volumes of data present a challenge for systematic human expert analysis. In such a datadriven context, Computational Intelligence (CI) has achieved significant momentum to analyze, mine, and extract the underlying data information, or solve complex optimization problems, striking a balance between productive efficiency and sustainability of food supply systems. Although some recent studies have sorted the CI literature in this field, they are mainly oriented towards a single family of CI methods (a group of methods that share common characteristics) and review their application in specific FSC stages. As such, there is a gap in identifying and classifying FSC problems from a broader perspective, encompassing the various families of CI methods that can be applied in different stages (from production to retailing) and identifying the problems that arise in these stages from a CI perspective. This paper presents a new and comprehensive taxonomy of FSC problems (associated with agriculture, fish farming, and livestock) from a CI approach; that is, it defines FSC problems (from production to retail) and categorizes them based on how they can be modeled from a CI point of view. Furthermore, we review the CI approaches that are more commonly used in each stage of the FSC and in their corresponding categories of problems. We also introduce a set of guidelines to help FSC researchers and practitioners to decide on suitable families of methods when addressing any particular problems they might encounter. Finally, based on the proposed taxonomy, we identify and discuss challenges and research opportunities that the community should explore to enhance the contributions that CI can bring to the digitization of the FSC.