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CNN Classifier for Pollution Level in Glass Insulators Operating at High Voltage Alternating Current

Electronics Letters 2025年第1期61卷

作者： Yuri dos Reis Oliveira Eduardo Costa da Silva Carlos Roberto Hall Barbosa M&I Electric Brazil Rio de Janeiro Brazil Department of Electrical Engineering PUC-Rio Brazil Postgraduate Program in Metrology PUC-Rio Brazil

This paper aims at developing a level of pollution severity (LPS) classifier for insulators, using a database of corona ultraviolet (UV) images and a computational intelligence algorithm based on convolutional neural networks, considering three different levels of pollution: very weak, weak and moderate. The obtained results show that the developed classifier reached high accuracy (98.57%) and low logarithmic loss values (0.059), indicating that it has a good capability to deal with the proposed classification task.

关键词： air pollution convolutional neural nets corona insulators ultraviolet spectra

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Electrochemical sensor based on CuO nanorods for the quantification of cyanide in mineral processing samples

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Journal of Industrial and engineering Chemistry 2025年

作者： Vilasó-Cadre, Javier E. Ramírez-Rodríguez, Alondra Hidalgo, Juan Santiago Reyes-Domínguez, Iván A. Cruz, Roel Thangarasu, Pandiyan Rodríguez-Torres, Israel Alonso-Torres, Sócrates González-Fernández, Lázaro A. Institute of Metallurgy. Autonomous University of San Luis Potosí Sierra Leona Av. 550 San Luis Potosí78210 Mexico "Babes-Bolyai" University Faculty of Chemistry and Chemical Engineering Department of Chemical Engineering Research Center of Electrochemistry and Non-Conventional Materials Arany Janos St.11 Cluj-Napoca 400028 Romania Insurgentes Sur Av. 1582 Mexico City03940 Mexico Ciudad Universitaria Mexico City04510 Mexico Multidisciplinary Postgraduate Program in Environmental Sciences Autonomous University of San Luis Potosí San Luis Potosí78000 Mexico

In this work, a CuO nanomaterial was synthesized and used for the development of electrochemical sensors for cyanide quantification in mineral flotation and leaching samples. The synthesis of tenorite nanorods (CuO NR) was performed by the chemical precipitation method. Two sensors were prepared: one by modifying a glassy carbon electrode using the drop-casting technique and the other by modifying a carbon paste electrode. The electrodes were optimized using response surface experimental designs. The modified glassy carbon electrode exhibited issues related to the destabilization of the CuO NR/Chitosan composite. Consequently, the carbon paste electrode was selected for the analytical validation and application in real samples. The analytical response was obtained in the range of 0.1 to 16.7 mmol/L. Quantification of real samples exhibited consistency with the volumetric method. The sensor demonstrated repeatability and reproducibility over a 30-day period. The interfering effect of a dithiophosphate collector on the electrochemical signal of cyanide was demonstrated. The electroactive area was calculated to be 0.0622 cm2, larger than that of the unmodified electrode. Diffusion was found to be the controlling process for the oxidation of cyanide at the electrode surface. In addition, a lower charge transfer resistance was found when the modified electrode was used. The sensor was demonstrated to facilitate the quantification of cyanide in complex samples with high solids content, which are commonly found in the mineral processing industry. © 2025 The Korean Society of Industrial and engineering Chemistry

关键词： Flotation

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Modelling and Application of Jutes Fiber Reinforced Epoxy Composite in the Development of Wind Blade for Low Intensity Winds

SSRN

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SSRN 2023年

作者： Junio, Raí Felipe Pereira Cardoso, Robson Luis B. Ramos, Roberto Paulo B. Leão Filha, Elza M. Ribeiro, Mauricio M. Candido, Verônica S. Rodrigues, Jean da S. Silva, Douglas Santos Monteiro, Sergio N. Fujiyama, Roberto T. Federal University of Pará—UFPA Engineering of Natural Resources of the Amazon Program Rua Augusto Corrêa 01 PA BelémCEP 66075-110 Brazil Federal Institute of Education Science and Technology of Pará – IFPA Materials Engineering Program Avenida Almirante Barroso 1155 Marco PA BelémCEP 66093-020 Brazil Federal University of Pará - UFPA Postgraduate Program in Industrial Engineering Rua Augusto Corrêa 01 PA BelémCEP 66075-110 Brazil Federal Institute of Education Science and Technology of Pará – IFPA Estrada do Icuí Guajará PA AnanindeuaCEP 67125-000 Brazil Military Institute of Engineering – IME Department of Materials Science Praça General Tibúrcio 80 Praia Vermelha Urca RJ Rio de JaneiroCEP 22290-270 Brazil

Natural fibres show an increasing potential as reinforcement of polymeric composites, representing a promising concurrent to glass and carbon fibres extensively used in the construction of wind turbine blades synthetic fibres recyclability/disposability and high production energy cost have already been discussed in the main turbine producing centres. In particular, the development of wind turbines for low wind speed areas can increase the energy generation potential of regions not originally eligible for the installation of large turbines. This study proposes the evaluation of the use of jute fibre (Corchorus capsularis) reinforced epoxy composite in the construction of S1210 airfoil profile, of a small-scale wind turbine for low wind speed regions, considering the structural parameters, developed incorporating the Classical Laminate Theory (CLT) and Extended Bredt-Batho Shear Flow Theory (EBSFT).In order to raise the elastic properties and enable the use of the failure criteria, the composite blades were characterized according to ASTM standards. The mechanical properties surveyed, together with the elastic parameters of the cross section, torsional stiffness, axial stiffness and flexural rigidity, demonstrated the feasibility of using the jute fiber reinforced epoxy composite in the blade construction, evaluated according to the maximum tension failure criterion. © 2023, The Authors. All rights reserved.

关键词： Laminated composites

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Xylose reductase generated by yeast Candida tropicalis purified using an aqueous two-phase system optimised by RSM

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Food Chemistry 2025年 490卷

作者： Leanderson Tulio Marques Lemos Lorena Lucena de Medeiros Normando Ribeiro-Filho Carlos Alberto Bispo de Sousa Sharline Florentino de Melo Santos Flávio Luiz Honorato da Silva Postgraduate Program in Food Science and Technology Federal University of Paraíba Campus I - Technology Center CEP 58051-900 João Pessoa PB Brazil Postgraduate Program in Chemical Engineering Federal University of Paraíba Campus I - Technology Center CEP 58051-900 João Pessoa PB Brazil

Xylitol is a sweetener, which can be produced by Candida yeasts. Xylitol production (XP) is expensive due to the high cost of enzymes production such as xylose reductase (XR). XR can be produced with a low-cost using cashew apple waste (CAW) hydrolysed; however, methods for XR purification are expensive. This study aims to optimise an ATPS using a response surface method (RSM) for xylose reductase (XR) purification. CAW was hydrolysed. Fermentations were conducted using yeast (CCT 1516) for XR production. Then, a RSM varying ATPS composition (polyetilenglycol (PEG, 1.6–2.4 g/L) and potassium phosphate (PP, 1–1.3 g/L) was applied for XR purification. The highest concentration of xylitol (15.4 g/L) generated was achieved at 40 h. The highest XR activity (0.4 U/mg) was reached at 28 h. RSM reveals that XR purification is positively affected by PEG, in contrast, PP did not affect XR purification.

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Tensions in design and participation processes: An ethnographic approach to the design, building and evaluation of a collective intelligence model

Tensions in design and participation processes: An ethnograp...

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International Conference on Computer Supported Cooperative Work in Design

作者： Ramon Chaves Claudia Motta Antonio Correia Jano de Souza Daniel Schneider Systems Engineering and Computer Science Program (PESC/COPPE/UFRJ) Rio de Janeiro Brazil Postgraduate Program in Informatics PPGI/UFRJ Rio de Janeiro Brazil Tércio Pacitti Institute of Computer Applications and Research (NCE) Federal University of Rio de Janeiro Brazil UTAD INESC TEC and University of Trás-os-Montes e Alto Douro Vila Real Portugal College of Information Science & Technology University of Nebraska at Omaha Omaha NE USA

This paper explores the challenges and strategies used to design, build and evaluate a collective intelligence (CI) model to support discussions about cities. Through an autoethnography of ideas and discussion practices in both online and offline contexts, this work explores the tensions between the chosen methodological approaches, including design science research (DSR) and participatory action research (PAR). Moreover, we also examine the challenges and pitfalls observed during the practical conduction of this research when involving participants in the process of empirically evaluating the proposed model. Finally, aspects related to the autoethnographic process itself as a reflective method are discussed alongside the consequences of desiring and seeking participation in the research process.

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Mapping Tokenomics Arrangements to Expand the Digital Nomad Ecosystem

Mapping Tokenomics Arrangements to Expand the Digital Nomad ...

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International Conference on Computer Supported Cooperative Work in Design

作者： Marcos Antonio de Almeida António Correia Jano Moreira de Souza Daniel Schneider Systems Engineering and Computer Science Program (PESC/COPPE/UFRJ) Rio de Janeiro Brazil INESC TEC and University of Trás-os-Montes e Alto Douro Vila Real Portugal College of Information Science & Technology University of Nebraska at Omaha Omaha NE USA Postgraduate Program in Informatics PPGI/UFRJ Rio de Janeiro Brazil Tércio Pacitti Institute of Computer Applications and Research NCE/UFRJ Rio de Janeiro Brazil

The Massification of remote work, in response to the COVID-19 pandemic, has been causing significant changes in productive and working arrangements, both for individuals, organizations, and society. At the level of personal life philosophy, for example, this transformation can be evidenced in the dissemination of digital nomadism values such as work/leisure balance among corporate workers. On the other hand, at the level of gig/crowd work platforms, the emergence of tensions may indicate the exhaustion of sociotechnical design models adopted by big techs. We show how evidence collected from digital nomads in empirical ethnography studies can inform HCI/CSCWD researchers of design-oriented strands to explore emerging opportunities in new creative digital crypto-economic ecosystems. Finally, we present a proposed research agenda to explore DNs’ activities in the crypto-economic ecosystem.

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Urban Transportation Planning, Sustainable Cities, Big Data, Intelligent Transport Systems

SSRN

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SSRN 2024年

作者： Vieira, Túlio Moita, Gray Ribeiro, Renato Meireles, Magali Postgraduate Program in Mathematical and Computational Modeling CEFET-MG Av. Amazonas 7675 Minas Gerais Belo Horizonte30510-000 Brazil Transport Engineering Department CEFET-MG Av. Amazonas 7675 Minas Gerais Belo Horizonte30510-000 Brazil Institute of Mathematical Sciences and Informatics PUC-Minas Walter Ianni 255 Minas Gerais Belo Horizonte31980-110 Brazil

This paper presents a comprehensive study on the critical role of efficient transportation systems in urban settings, particularly in developing countries. It underscores the socio-economic and environmental impacts of inadequate urban planning and highlights the disproportionate effects on the most vulnerable populations. The study proposes a novel, low-cost framework that leverages advancements in artificial intelligence, information systems, and hardware to improve the efficiency and accessibility of public transportation systems. The framework enables the construction of automatic origin-destination matrices and continuous monitoring of key transportation indicators, facilitating more accurate and timely decision-making. The paper also presents a comparative analysis of the proposed methodology with existing ones in the literature, validating its effectiveness with field-collected data. The study concludes by emphasizing thepotential of technology in addressing urban transportation challenges, contributing to the broader goal of creating sustainable and inclusive cities. This work serves as a valuable tool for urban planners in resource-constrained settings, bridging the gap between advanced technology and urban planning. © 2024, The Authors. All rights reserved.

关键词： Urban transportation

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Design of cañihua-rice: Development and characterization of an analogue of rice by warm-extrusion of cañihua (Chenopodium pallidicaule Aellen) and rice (Oryza sativa) flours

Food and Humanity

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Food and Humanity 2024年 2卷

作者： Quispe, A.J. Moreno, M.C. Leon, A.M. Bouchon, P. Medina, W.T. Student doctorate in Health Sciences Program Postgraduate School Univ. Nacional del Altiplano de Puno P.O. Box 291 Puno Peru Dept. of Chemical and Bioprocesses Engineering School of Engineering Pontificia Univ. Católica de Chile P.O. Box 306 Santiago Chile School of Agroindustry Engineering Faculty of Agrarian Sciences Univ. Nacional del Altiplano de Puno P.O. Box 291 Puno Peru

Many countries have native crops with excellent protein quality that are not widely consumed because they have been displaced by introduced crops such as rice. This work proposes the design of food matrices combining the structural and physical qualities of rice with high cañihua protein quality, a South America highlands ancestral crop. Different extruded cañihua-rice mixtures were physically and microstructurally characterized and compared with those of brown and extruded-rice. Cañihua-rice grains were treated by warm-extrusion process to give formulations of 10%−90% and 20%−80% of cañihua flour and rice flour, respectively. Physicochemical analyses showed that protein contents resulting from addition of cañihua-rice grains were 8.8% and 10%, respectively, compared to 7% of rice flour. Hardness of cooked cañihua-rice grains was similar to extruded-rice and slightly lower than cooked brown rice, while color of these grains was between those of extruded and brown rice. Microstructural analyses (FESEM and micro-CT) showed that extruded cañihua-rice mixtures had heterogeneous particles of cañihua flour embedded in rice flour structure. Sensorial analysis showed that cooked cañihua-rice from Cupi10 were similar to brown rice cooked. Finally, extruded cañihua-rice mixtures constituted a novel food matrix that could be used to increase the nutritional levels for consumers of rice. © 2023 Elsevier B.V.

关键词： Cañihua flour Microstructure Rice analog Warm extrusion

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Article processing complex events in fog-based internet of things systems for smart agriculture

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Sensors 2021年第21期21卷

作者： da Costa Bezerra, Sandy F. Filho, Airton S. M. Delicato, Flavia C. da Rocha, Atslands R. Postgraduate Program of Teleinformatics Engineering Federal University of Ceara Fortaleza60455-970 Brazil Departament of Teleinformatics Engineering Federal University of Ceara Fortaleza60455-970 Brazil Institute of Computing Fluminense Federal University Niteroi24210-310 Brazil

a, s Abstract: The recent growth of the Internet of Things’ services and applications has increased data processing and storage requirements. The Edge computing concept aims to leverage the processing capabilities of the IoT and other devices placed at the edge of the network. One embodiment of this paradigm is Fog computing, which provides an intermediate and often hierarchical processing tier between the data sources and the remote Cloud. Among the major benefits of this concept, the end-to-end latency can be decreased, thus favoring time-sensitive applications. Moreover, the data traffic at the network core and the Cloud computing workload can be reduced. Combining the Fog computing paradigm with Complex Event Processing (CEP) and data fusion techniques has excellent potential for generating valuable knowledge and aiding decision-making processes in the Internet of Things’ systems. In this context, we propose a multi-tier complex event processing approach (sensor node, Fog, and Cloud) that promotes fast decision making and is based on information with 98% accuracy. The experiments show a reduction of 77% in the average time of sending messages in the network. In addition, we achieved a reduction of 82% in data traffic. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.

关键词： Internet of things

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Freeze-dried jaboticaba(Myrciaria jaboticaba)peel powder,a rich source of anthocyanins and phenolic acids,mitigates inflammation-driven colorectal cancer in mice

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Food Bioscience 2023年第3期53卷 1060-1071页

作者： Roberto de Paula do Nascimento Julia Soto Rizzato Gabriele Polezi Amanda Maria Tomazini Munhoz Moya Milena Ferreira Silva Ana Paula da Fonseca Machado Gilberto Carlos Franchi Junior Renata Galhardo Borguini Manuela Cristina Pessanha de Araújo Santiago Ana Paula Ribeiro Paiotti JoséAires Pereira Carlos Augusto Real Martinez Mario Roberto Marostica Junior Laboratory of Nutrition and Metabolism(LANUM) Department of Food Science and Nutrition(DECAN)School of Food Engineering(FEA)University of Campinas(UNICAMP)CampinasSPBrazil Laboratory of Food Nutritionand HealthDepartment of Food Science and Nutrition(DECAN)School of Food Engineering(FEA)University of Campinas(UNICAMP)CampinasSPBrazil Laboratory of Cellular and Behavioral Pharmacology Federal University of São Paulo(UNIFESP)Diadema CampusDiademaSPBrazil Integrated Research Center for Onco-Hematological Childhood Diseases School of Medical Sciences(FCM)University of Campinas(UNICAMP)CampinasSPBrazil Brazilian Agricultural Research Corporation(EMBRAPA) Embrapa Food TechnologyRio de JaneiroRJBrazil Laboratory of Hepatology Molecular Applied-Discipline of GastroenterologyFederal University of S˜ao Paulo(UNIFESP)S˜ao Paulo CampusS˜ao PauloSPBrazil Postgraduate Program in Health Sciences S˜ao Francisco University(USF)Bragança Paulista CampusBragança PaulistaSPBrazil

This study aimed to characterize the peel of jaboticaba(Myrciaria jaboticaba(Vell.)***)by spectropho-tometry and chromatography,and investigate its effects on mice with inflammation-driven colorectal cancer(CRC).Freeze-dried jaboticaba peel(FDJP)showed a high antioxidant capacity in vitro,and to be mostly a source of cyanidin-3-O-glucoside,gallic acid,and ellagic *** the animal bioassay,FDJP added at 5%in the diet during 114 days completely abolished the formation of adenocarcinoma,which had an incidence of 75%in the non-treated *** consuming FDJP showed low histology damage regarding inflammatory infiltrate,edema,and crypt *** significantly reduced the colonic levels of proinflammatory markers interleukin-1beta and cyclooxygenase-2,and demonstrated a probability to decrease the expressions of inducible nitric oxide synthase and nuclear factor kappa *** summary,FDJP mitigated CRC,possibly by avoiding trig-gering *** benefit may come from its rich content in anthocyanins and phenolic acids.

关键词： Brazil Carcinogenesis Colitis Cyanidin-3-O-Glucoside Flavonoid Fruit

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