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Made available in DSpace on 2022-04-28T19:42:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-11-01 Renewable sources of energy appear to be a great solution to problems related to rising demand for electricity and the ever-growing worldwide concern about carbon dioxide emission levels as they are non-polluting, clean and abundant. Wind energy is one of the most promising forms of renewable energy. Thus, in order to further improve wind generation technology, this work presents a wind turbine emulator (WTE) capable of simulating power curves of a turbine by means of hardware-in-the-loop control. An WTE is an important tool for the development of renewable energy systems providing a controllable test environment that allows the evaluation and improvement of control schemes which is difficult to acquire in real wind turbines as wind speed is random. Thus, this paper presents the analysis, modeling and experimental implementation of a wind turbine emulator using a three-phase induction motor (TIM) driven by a frequency inverter. For this, a closed loop control of torque and speed is implemented. This control causes the TIM along with the frequency inverter to emulate the actual behavior of a wind turbine, considering variations in wind dynamics, aerodynamic phenomena, load effects and pitch angle. The control algorithm is designed via MATLAB / Simulink software and communication between the computational model and the experimental bench is ensured through the microcontroller DSP TMS320F28335. Using a torque sensor and an encoder, this model defines the torque level on the system shaft and the rotational speed of the TIM. These signals are fed back to the computational model and thus the power curve of the WTE is defined with the voltage level to be applied to the frequency inverter. Experimental results demonstrate the effectiveness of using the TIM-frequency inverter assembly for emulating a wind turbine, since the WTE can represent a real wind turbine. Electrical Engineering Department São Paulo State University (UNESP) School of Engineering Electrical Engineering Department São Paulo State University (UNESP) School of Engineering

Introduction: Accessibility can help people with disabilities to participate actively in the society with equal access and equal opportunities. Accessible tourism enables people to become more included and enjoy tourism experiences. Technology has facilitated tourism for people with disabilities and a Geographic Information System (GIS) can provide the tourist guidance, navigable digital maps and enable the searching of places information. Purpose: The objective of this paper is to describe the development of a collaborative app with accessibility information in order to help people with disabilities planning and moving more independently. Method: To develop this work a research about GIS apps related to disabled people was carried out, a pilot project to validate the idea and the app development proposed. Results: The accessible places map was developed using free GIS technologies and is available for download in Google Play Store. Conclusions: The app will help people with disabilities to move more safely and comfortably, and the increase of public data in GIS by the civil engagement. Accessibility can aid people with disabilities to participate enthusiastically in society with equitable access and fair opportunities. Accessible tourism enables them to become more included and enjoy their experiences. Technology has facilitated travel for individuals with disabilities, and a Geographic In-formation System (GIS) can provide tourist guidance, navigable digital maps, and enable the searching of places information. To support people with disabilities planning and moving more independently, the objective of this article is to propose an application to assist them by providing accessibility information about tourist places. To realize this work, research about GIS related to disabled persons was carried out, a pilot project to validate the idea and the app development proposed. As a result, the map of the accessible places was developed using free GIS technologies. This app will encourage people with disa-bilities to move more safely and comfortably, and increase open data in GIS by civil engagement

Urban solid waste management is a complex system due to the many variables that compose it, which makes it difficult for managers to make decisions. Among the decision-making tools is system dynamics. To identify the gaps between the literature and the studies about urban solid waste management by using system dynamics method, a survey of published papers on the subject was made, which were later analyzed using some defined criteria, such as the level of the study, the software used for modeling, the variables included in the model, among others. The research identified that, among the stages of solid waste management, the collection process is still little incorporated in the models, being mentioned in only nine studies analyzed. Besides, the environmental, financial and institutional requirements were not adequately explored in the models. Future research should endeavor to include these elements in the models, which will allow the proposed system to be approximated to the complex reality of solid waste management.

Access to new technologies is slowly changing classrooms and theirdynamics. Gamification has been a widely used approach, and its benefits are still being studied. This paper aims to present a serious game which assists in teaching the SCRUM (software development) framework in higher education disciplines. For this, a virtual game has been created containing two different ways of playing, and its performance as a support tool to traditional teaching methodologies has been analyzed. Through a planned experiment, it was possible to identify a direct positive impact on students Learning Gain.

O presente artigo apresenta um mapeamento cognitivo causal elaborado a partir de pesquisas realizadas por especialistas a respeito dos temas ergonomia e segurança em tratores agrícolas. Utilizou-se o mapeamento para representar as informações disponibilizadas em normas técnicas e regulamentadoras nacionais, bem como, em trabalhos científicos divulgados no Portal de Periódicos CAPES/MEC. Os procedimentos adotados na construção dos mapas foram a pesquisa documental e bibliográfica. Além disso, fez-se entrevistas com especialistas em máquinas agrícolas a fim de considerar suas experiências a partir de padrões pessoais de conhecimento. Objetivou-se, através da elaboração do mapeamento, a visualização das relações de causa e efeito dos temas aplicados aos tratores agrícolas. Com a análise do mapeamento cognitivo identificaram-se itens e índices adequados para a avaliação de níveis ou graus de eficácia funcional e satisfação dos diversos atores quanto à ergonomia e à segurança dessas máquinas, de forma a determinar ações potenciais para apoiar a tomada de decisão no momento em que o agricultor venha a adquiri-las., This article presents a causal cognitive mapping based on research conducted by specialists on ergonomics and safety issues in agricultural tractors. We used the mapping to represent the information provided in Brazilian technical and regulatory standards, as well as in scientific papers published in the CAPES/MEC Journal WebPortal. We adopted documentary and bibliographic research procedures in the construction of the maps. In addition, we conducted interviews with agricultural machinery experts in order to consider their experiences based on personal knowledge patterns. The objective of this research was the visualization of the cause and effect relations of the themes applied to agricultural tractors through the elaboration of the mapping. The analysis of cognitive mapping identified items and indexes suitable for the evaluation of levels or degrees of functional effectiveness and satisfaction of the various actors regarding the ergonomics and safety of these machines, in order to determine potential actions to support decision-making when the farmer acquires them., Facultad de Ciencias Agrarias y Forestales