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3rd International Symposium on Instrumentation Systems, Circuits and Transducers: Chip in the Pampa, INSCIT 2018

作者： Oliveira, Jackson Moreira De Sousa, Fabio Barros De Sousa, Fiterlinge Martins De Oliveira, Jorge Everaldo Costa, Marcio Benedito Caldas Postgraduate Program in Electrial Engineering - MINTER Federal University of Southern and Southeastern Para Federal Institute of Para Maraba Para Brazil Postgraduate Program in Electrial Engineering Federal University of Para Belem Para Brazil Postgraduate Program in Electrial Engineering - DINTER Federal University of Southern and Southeastern Para Maraba Para Brazil Faculty of Materials Engineering Federal University of Para Ananindeua Para Brazil

ISBN: (纸本)9781538672983

In this paper, the semiconductor optical amplifier (SOA) is used with a Michelson interferometer (MI) forming a structure of SOA-MI logic devices with symmetrically identical Fiber Bragg Grating (FBG) at the output of each of its arms, to a numerical simulation of the all-optical AND logic gate of two binary input data signals with different bit numbers using crossgain modulation (XGM) technique at 10 Gb/s bit rate and filter bandwidth at 10, 20 and 40 GHz using OptiSystem 15.0 software from OptiWave Corporation, to demonstrate and extract simple design rules for high-speed optical processing and analysis of non-linear SOA-induced properties. In addition, this work includes the study of the effect of bandwidth and number of bits on received power, minimum bit error rate (BER) and maximum quality factor (Q-factor) and Optical Signal to Noise Ratio (OSNR). We run the SOA-MI-based AND logic gate with some parameters and the results can demonstrate a structure of highperformance optical logic devices with high speed. © 2018 IEEE.

关键词： Logic gates

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Evaluating an e-Learning Platform at Graduate School Based on User Experience Evaluation Technique 3

Evaluating an e-Learning Platform at Graduate School Based o...

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3rd International Conference on Electrical, Electronics, Informatics, and Vocational Education, ICE-ELINVO 2020

作者： Abubakari, M.S. Nurkhamid Hungilo, G. Department of Electronics Engineering Education Postgraduate Program Universitas Negeri Yogyakarta Indonesia Department of Informatics Engineering Graduate Program University Atma Jaya Yogyakarta Indonesia

This study was aimed to evaluate the e-learning platform in a graduate school by using User Experience Questionnaire (UEQ). The data were collected from 65 respondents and analyzed using an excel data analysis tool. The results indicate that all six scales of the instrument are consistent except the novelty scale. Also, the calculated means of the scales are slightly positive as all values are greater than 0.8 compared to the UEQ benchmark. Although the respondents show a little positive impression with the platform, all scales means are below average category except efficiency scale which is above average as compared to the benchmark. This indicates that the platform needs more improvement in all aspects of user experience for it to be at least in a good category. The findings discussed in this paper are valuable for all academic stakeholders in various educational institutions which implement interactive e-learning systems as well as practitioners of user experience and developers of e-learning systems. © 2021 Published under licence by IOP Publishing Ltd.

关键词： Learning systems

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Optimization of second order spatially distributed systems with multiple interconnected actuator/sensor pairs

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IFAC-PapersOnLine 2016年第18期49卷 476-481页

作者： Demetriou, Michael A. Fahroo, Fariba Aerospace Engineering Program Mechanical Engineering Department Worcester Polytechnic Institute WorcesterMA01609 United States Department of Applied Mathematics Naval Postgraduate School MontereyCA93943 United States

This work considers the economic aspects in control implementation of second order spatially distributed systems. By opting to use multiple actuator/sensor pairs with limited capacity, instead of a single actuator/sensor pair with higher price and larger capacity, this work provides a first view into the economic, computational and communication aspects. Considering a large number of actuator/sensor pairs and the a priori defined controller architecture of static output feedback along with the collocation assumption of the actuators and sensors, the resulting closed-loop system is expressed in terms of a static output feedback gain matrix that defines the communication amongst the actuator/sensor pairs. The design problem is then to find the values of the static feedback gain matrix in order to optimize a performance measure. Using the energy of the second order infinite dimensional system as the performance measure, the resulting optimization is expressed in terms of the solution to a parameterized operator Lyapunov equation. Simulation studies of the wave PDE in one spatial dimension for different communication topologies, reveal the effects of communication on the performance of the closed loop system. © 2016

关键词： Actuators Closed loop systems Feedback control Lyapunov functions Spatial distribution Actuator/sensor Communication topologies Controller architectures Distributed parameter systems Infinite dimensional system Second order systemss Spatially distributed system Static output feedback

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Polymer blends of poly(lactic acid) and starch for the production of films applied in food packaging: A brief review

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Polymers from Renewable Resources 2023年第2期14卷 108-153页

作者： Carneiro da Silva, Lucas Rafael Rios, Alessandro de Oliveira Campomanes Santana, Ruth Marlene Postgraduate Program in Mining Metallurgical and Materials Engineering Laboratory of Polymeric Materials Federal University of Rio Grande do Sul Rio Grande do Sul Brazil Postgraduate Program in Food Science and Technology Laboratory of Bioactive Compounds Federal University of Rio Grande do Sul Rio Grande do Sul Brazil

The limited degradation of synthetic polymers used in food packaging when discarded in the environment is a major concern for society. Therefore, industry and academia have sought to develop biodegradable and eco-friendly materials for single-use in packaging. An interesting alternative for the food industry is biodegradable polymeric films, which is why different biopolymers have been used in the production of sustainable packaging. It is worth mentioning that the use of biodegradable polymers is one of the most successful innovations in the industry to address issues related to the environment. Among the available raw materials, starch extracted from different renewable sources is very promising for this purpose, due to its abundance, low-cost compared to other polymers and ability to produce non-toxic films. However, when used alone, pure starch has many limitations, which can be overcome by developing a mixture with other polymers (polymer blends), preferably from renewable and biodegradable sources, such as poly(lactic acid) (PLA). In this context, the absence of literature reviews evidencing the results of the application of films in foods led us to write this article, given the importance of polymer blends produced with different types of starch (cassava, corn, pea, potato, rice and wheat) and the PLA matrix. According to the results, it is clear that polymer blends based on PLA/Starch for food packaging are very promising, already being part of the industries solutions, aiming to minimize the large volume of plastic waste of petrochemical origin discarded in nature. Obviously, as with any technology, more research is needed to further improve the performance of the films, and while much research has made great strides, there are still limitations that prevent the commercialization of these materials. © The Author(s) 2023.

关键词： Starch

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Graphene's photonic and optoelectronic properties——A review

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Chinese Physics B 2020年第3期29卷 13-35页

作者： A J Wirth-Lima P P Alves-Sousa W Bezerra-Fraga Department of Physics Federal Institute of EducationScience and Technology of Ceara Campus SobralCearaBrazil Postgraduate Program in Electrical Engineering and Computing Federal University of Ceara(U.F.C.)Sobral CearaBrazil

Due to its remarkable electrical and optical properties,graphene continues to receive more and more attention from researchers around the *** excellent advantage of graphene is the possibility of controlling its charge density,and consequently,the management of its conductivity and dielectric constant,among other *** is noteworthy that the control of these properties enables the obtaining of new optical/electronic devices,which would not exist based on conventional ***,to work in this area of science,it is necessary to have a thorough knowledge regarding the electrical/optical properties of *** this review paper,we show these graphene properties very well detailed.

关键词： absorbance conductivity dielecric constant dispersion relation

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A framework of strategy formulation to improve competitive advantage in sustainable manufacturers and their supply chain 6

A framework of strategy formulation to improve competitive a...

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6th International Conference on Information Systems, Logistics and Supply Chain, ILS 2016

作者： Satyro, Walter C. Sacomano, Jose B. Contador, Jose C. Raymundo, Helcio Postgraduate Program in Production Engineering Paulista University-UNIP Sao Paulo S.P. Brazil Postgraduate Program in Administration Paulista University-UNIP Sao Paulo S.P. Brazil

The objective of this research is to provide a framework to guide manufacturers that compete in environmental sustainability, as well as their supply chains, to formulate a business strategy to improve competitive advantage. It is a theoretical study based on literature review and in the model of Campos e Armas da Competicao - CAC, in Portuguese (Fields and Weapons of the Competition). The contribution of this research is to present a study of the many factors that can influence the formulation of a business strategy, helping the responsible for such formulation to reach competitive advantage in sustainable basis, mainly in a world where what is at stake is not only the success of the companies, but the future of our planet, of our own humanity.

关键词： Supply chains

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The effect of chlorinated cyanurates on the formation of disinfection byproducts in the production of reuse water from secondary sanitary effluent

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Journal of Environmental Chemical engineering 2025年第3期13卷

作者： Cristina Filomêna Pereira Rosa Paschoalato Talita Rafaella da Silva Boldrin Dias Márcia Maísa de Freitas Afonso Marília Vanconcellos Agnesini Guilherme Sgobbi Zagui Angela Di Bernardo Dantas Murilo Daniel de Mello Innocentini Postgraduate Program in Environmental Technology University of Ribeirão Preto Brazil Course of Chemical Engineering University of Ribeirão Preto Brazil Hidrosan Engenharia São Carlos SP Brazil Centre for Regenerative design and Engineering for a NEt positive World (RENEW) University of Bath UK

Chlorination is an effective and proven method for disinfecting reclaimed water, but side reactions between chlorine and organic matter in the effluent can produce a variety of toxic disinfection byproducts (DBPs). While inorganic chlorine is commonly used in wastewater treatment facilities, little attention has been paid to the use of chlorinated cyanurates such as sodium dichloroisocyanurate (NaDCC) and trichloroisocyanuric acid (TCCA), which have long been used to disinfect drinking water for human consumption and recreation. In this work, the performances of NaDCC and TCCA were compared with sodium hypochlorite (NaClO), either in solution or onsite generated by electrolysis (NaClO-e), to disinfect the secondary effluent (SE) from a municipal wastewater treatment plant (WWTP) aiming for nonpotable reuse applications. The chlorinated product dosages were determined using breakpoint demand tests at 25°C, pH 7.0, and contact times of 0.5 and 24 h. DBPs from trihalomethanes, haloaldehydes, halopicrins, haloacetonitriles, and haloketones were measured. To achieve the breakpoint with a free residual chlorine of 1 mg Cl 2 L −1 and promote complete SE disinfection, dosages of 50 mg Cl 2 L −1 were required. NaDCC and TCCA produced significantly more chloroform (635.2 µg L −1 and 440.1 µg L −1 ), bromodichloromethane (53.6 µg L −1 and 33.9 µg L −1 ), chloral hydrate (363.4 µg L −1 and 308.2 µg L −1 ), and 1,1,1-trichloropropanone (89.0 µg L −1 and 142.2 µg L −1 ), listed as possible or probable carcinogens. The municipal WWTP's cost assessment for chlorinating 18000 m 3 d −1 of SE revealed the benefits of using NaClO-e, including low production of DBPs and no increase in organic carbon in the medium.

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Building effective narratives for educational games 14

Building effective narratives for educational games

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14th Latin American Conference on Learning Technologies, LACLO 2019

作者： Frango Silveira, Ismar Electrical Engineering and Computing Postgraduate Program Mackenzie Presbyterian University São Paulo SP Brazil

ISBN: (纸本)9781728142869

It is well-known that educational games often suffer from a complete no-alignment between game narrative and educational goals. Whilst the last are tied to curricular specifications and, in many times, inspired in textbooks and conventional exercises, narratives are meant to lead the player/student to the flow state. However, in educational games, such a state only is reached trough the combination of both, which is barely obtained by most of them. In this sense this paper proposes a foundational set of good practices for Educational Game Design, aiming to serve as a conceptual framework to support game designers, content creators and teachers/professors in this intrinsically multidisciplinary task, which is to seamlessly integrate narrative elements with game mechanics, dynamics and learning goals. © 2019 IEEE.

关键词： Game design

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Circular Economy of Water: A Review of Scientific Production 2nd

Circular Economy of Water: A Review of Scientific Production

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2nd International Conference on Water Energy Food and Sustainability, ICoWEFS 2022

作者： Endo, Gustavo Yuho Lenzi, Giane Gonçalves Postgraduate Program in Production Engineering Federal University of Technology – Paraná Ponta Grossa84017-220 Brazil

ISBN: (纸本)9783031268489

The general aim of the research was to analyse the scientific production on the circular economy of water in the Web of Science database. The systematic and integrative review used the Methodi Ordinatio, which made it possible to identify the most relevant articles on the circular economy of water. The main findings were the identification of 38 articles on the circular economy of water, in which the years 2018 and 2020 were the years with the most publications. The contexts already studied demonstrated that the circular economy is related to assessing the life cycle, the techniques related to the reuse and recovery of water, education models and strategic issues. The areas surveyed were mainly associated with the public area, tourism, entrepreneurship and manufacturing. It is essential to emphasise the importance of research related to water since the concern with this resource has been observed. The discussions are far from being exhausted;therefore, a proposal for a future agenda has been presented, indicating the direction for future research about the theme. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.

关键词： Water conservation

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Improved sliding mode and PLL speed estimators for sensorless vector control of induction motors 13

Improved sliding mode and PLL speed estimators for sensorles...

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13th IEEE International Conference on Industry Applications, INDUSCON 2018

作者： Pinheiro, Diego D. Carati, Emerson G. Sant, Felipe S. Del Costa, Jean P. Da Cardoso, Rafael De Stein, Carlos M. P. PPGEE - Postgraduate Program in Electrical Engineering UTFPR - Federal University of Technology - Paraná Pato Branco Brazil

ISBN: (纸本)9781538679951

In the last four decades, several approaches of sensorless drives for induction machines (SDIM) have been proposed. This paper presents an evaluation and improvement of conventional and high performance techniques for rotor speed estimation. The proposed SDIM uses indirect field-oriented control (IFOC), which is composed of proportional-integral type (PI) controllers. The speed estimation techniques analyzed are Rotor Flux MRAS, Back EMF MRAS, and Instantaneous Reactive Power MRAS, PLL and Sliding Mode. This paper also shows improvements at structure of sliding mode estimator. The techniques are evaluated using numerical and experimental results. The setup applied a F28069 DSP for experimental implementation of the control scheme and the speed estimation techniques. The performance verification considered a wide speed range and load changes. Results demonstrates the feasibility of replacing mechanical sensors by analyzed estimation techniques. © 2018 IEEE.

关键词： Induction motors

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