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25th International Conference on Enterprise Information systems, ICEIs 2023

作者： de souza, pedro Lopes de souza, Wanderley Lopes pires, Luís Ferreira Moreira, João Luiz Rebelo da silva Rodrigues, Ronitti Juner Ciferri, Ricardo Rodrigues Semantics Cybersecurity & Services Group Faculty of Electrical Engineering Mathematics and Computer Science University of Twente P.O. Box 217 Enschede Netherlands Ubiquitous Computing Group Graduate Program in Computer Science Computing Department Federal University of São Carlos P.O. Box 676 São Carlos Brazil

ISBN: (纸本)9789897586484

Hypertension is a noncommunicable disease (NCD) that causes global concern, high costs and a high number of deaths. Internet of Things, Ubiquitous Computing, and Cloud Computing enable the development of systems for remote and real-time monitoring of patients affected with NCDs like hypertension. This paper reports on a system for monitoring hypertension patients that was built by employing these techniques. This system allows the vital signs of a patient (blood pressure, heart rate, body temperature) to be captured via sensors built in a wearable device similar to a wristwatch. These signals are transmitted to the patient's mobile device for processing, and the generated clinical data are sent to the cloud to be properly presented and analysed by the health professionals responsible for the patient. To deal with semantic interoperability issues that arise when multiple different devices and system components must interoperate, a semantic model was conceived for this system in terms of ontologies for diseases and devices. This paper also presents the semantic module that we developed and implemented in the cloud to perform reasoning based on this model, demonstrating the potential benefits of incorporating semantic technologies in our system. Copyright © 2023 by sCITEpREss - science and Technology publications, Lda. Under CC license (CC BY-NC-ND 4.0)

关键词： Ontology

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The Effect of air carbon arc gouging on the mechanical and electrochemical properties of AIsI 316L submerged arc welds 11

The Effect of air carbon arc gouging on the mechanical and e...

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11th European stainless steel Conference science and Market, EssC 2022 and 7th European Duplex stainless steel Conference and Exhibition, DUpLEX 2022

作者： Campesan, Gabriel Roberto de Bribean Guerra, Ana paula Koga, Guilherme Yuuki Bolfarini, Claudemiro Federal University of São Carlos Department of Materials Science and Engineering Rod. Washington Luis São Carlos SP CEP 13565-905 Brazil Federal University of São Carlos Graduate Program in Materials Science and Engineering Rod. Washington Luis São Carlos SP CEP 13565-905 Brazil

ISBN: (纸本)9788898990269

In the maintenance and manufacturing practices of equipment in the petrochemical industry, the air carbon arc gouging-ACG is used in the preparation of carbon steel joints to be repaired or joined by welding. However, the standards impose several restrictions to the use of this cost-effective process to stainless steels. The main concern is the pick-up of carbon and sensitization of the steels against corrosion. Therefore, this paper aimed to evaluate the effect of ACG of AIsI 316L steel on its electrochemical and mechanical properties. The repaired/welded joints were studied in three different situations, namely: i) any type of cleaning, ii) brushing and iii) machining after gouging. The 20-mm-thick plate was submerged arc welded. Different regions on cross-section of welds were inspected to assess the degree of sensitization by double-loop electrochemical potentiokinetic reactivation (DL-EpR) method, and the risk of intergranular corrosion by oxalic acid etching tests. The electrochemical techniques and mechanical tests (only welded joints) such as tensile, hardness and impact measurements showed no impairing of such properties with the use of ACG, irrespective to the cleaning method used. © EssC and DUpLEX 2022. All rights reserved.

关键词： Welds

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preparation of LFp-based cathode materials for lithium-ion battery applications

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materials Today: proceedings 2022年 65卷 2347-2350页

作者： suttison, suchanat pengpat, Kamonpan Intatha, Uraiwan Fan, Jinchen Zhang, Wei Eitssayeam, sukum Master's Degree Program in Materials Science Faculty of Science Chiang Mai University Chiang Mai 50200 Thailand Graduate School Chiang Mai University Chiang Mai Thailand Department of Physics and Materials Science Faculty of Science Chiang Mai University Thailand Center of Innovative Materials for Sustainability School of Science Mae Fah Luang University Chiang Rai 57100 Thailand School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai 200093 China Department of Engineering Mechanics Dalian University of Technology Dalian 116024 China

Lithium-ion batteries (LIB) have developed into the mainstream power source of energy storage devices due to their advantages: high power density, high power, long service life, and less pollution. This materials development for LFp batteries was considered successful in synthesizing powder. Here we show that three synthesis conditions were performed. LFp doped NiO, NMC, and (NH4)2HpO4 were synthesized by the nitrogen gas flow method. LFp-doped NiO was burned at 600 °C and 700 °C for five h. NMC doped with LFp burned at 550 °C for five h, and NMC-doped LFp and (NH4)2HpO4 were burned at 550 °C and 600 °C for five h. The structure and morphology of the material were examined by X-ray diffraction (XRD) and scanning electron microscopy (sEM). © 2022

关键词： Lithium-ion batteries

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Evaluation of single and Duplex plasma Treatment Applied to Aisi 409 stainless steel

SSRN

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ssRN 2024年

作者： do Monte e silva, André Felipe soares de Almeida, Larissa solano Monteiro, Leandro Rossino, Luciana sgarbi Nunes, Maelson sousa Libório, Maxwell santana de Carvalho Costa, Thércio Henrique Bandeira, Rafael Marinho de sousa, Rômulo Ribeiro Magalhães Post-Graduate Materials Science and Engineering Program Federal University of Piauí PI Teresina Brazil Post-Graduate Program in Materials Science Federal University of São Carlos São Carlos Brazil Post-Graduate Program in Chemistry Federal University of Piauí PI Teresina Brazil School of Science and Technology Federal University of Rio Grande do Norte RN Natal Brazil Brazil Department of Mechanical Engineering Federal University of Piauí PI Teresina Brazil Brazil

The industrial landscape has witnessed a growing demand for components exhibiting superior performance and extended lifespan, especially in parts made of stainless steels like AIsI 409 steel, widely used in automotive exhaust systems, heat exchangers, and lightweight structural components. This study investigates the enhancement of surface properties of AIsI 409 stainless steel through cathodic cage plasma nitriding (CCpN) and cathodic cage plasma deposition (CCpD) processes, focusing on the novel implementation of duplex treatments. The research aims to improve the mechanical strength, wear resistance, and corrosion resistance of the steel by forming nitrides and vanadium nitride films on its surface. The duplex treatments, specifically N400D450 and N450D450, were found to significantly enhance the hardness of AIsI 409 stainless steel, with the N450D450 sample achieving a maximum hardness of 1100 HV—a 461.22% increase compared to the untreated steel. This enhancement is attributed to the formation of a thick, uniform nitrided layer followed by a vanadium nitride film. The critical role of processing order was highlighted, with the sequence of nitriding followed by deposition proving more effective than the reverse. Corrosion resistance was markedly improved in the duplex-treated samples. The N450D450 sample exhibited an Ecorr of -198 mV and reduced jcorr values, indicating superior resistance to corrosive environments. These results underscore the synergistic effect of combining nitriding and vanadium deposition, which optimizes the formation of protective surface layers. Overall, this study demonstrates that duplex treatments significantly enhance the surface properties of AIsI 409 stainless steel, offering the potential for extended component lifespan and reduced maintenance in industrial applications. The findings suggest that careful control of process parameters and treatment sequence is essential for achieving optimal results. © 2024, The Authors. All rights

关键词： Tribology

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Development of educational software for stainless steel selection and evaluating usability using the system Usability scale (sUs)

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International Journal of Mechanical engineering Education 2024年

作者： Nery, Macclarck pessoa dos santos Neto, severiano José Alves, Roberty santos santana, João Vitor dos santos Griza, sandro Martins, Carlos Otávio Damas Materials Science and Engineering Pos-graduation Program – p2cem from Federal University of Sergipe São Cristovão City Brazil Mechanical Engineering Department Federal University of Sergipe São Cristovão City Brazil Department of Materials Science and Engineering Federal University of Sergipe São Cristovão City Brazil

The use of educational technologies is an important part of the learning process. The development of educational apps and software is one of the pillars of this evolution in teaching. Material selection is one of the most important subjects in professional engineering education. Regarding materials used to manufacture products, the stainless steels are the most commonly used materials after traditional steels. In the industrial environment, fatigue, corrosion-fatigue, and stress corrosion cracking are three very important considerations in the selection of materials. This study evaluates the usability of educational software developed in Java using object-oriented programming using the system Usability scale and compares it with results obtained from other educational technologies. © The Author(s) 2024.

关键词： software testing

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On the development of modular polyurethane-based bioelastomers for rapid hemostasis and wound healing

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Regenerative Biomaterials 2023年第1期10卷 640-654页

作者： Wanxin Guo Binan Zhao Muhammad shafiq Xiao Yu Yihong shen Jie Cui Yujie Chen pengfei Cai Zhengchao Yuan Mohamed EL-Newehy Hany EL-Hamshary Yosry Morsi Binbin sun Jianfeng pan Xiumei Mo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative MedicineCollege of Biological Science and Medical EngineeringDonghua UniversitySongjiangShanghai 201620P.R.China Department of Orthopedics Shanghai Tongji HospitalSchool of MedicineTongji UniversityPutuoShanghai 200065China Department of Chemical Engineering Faculty of EngineeringGraduate SchoolKyushu UniversityFukuoka 819-0395Japan Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Faculty of Engineering and Industrial Sciences Swinburne University of TechnologyBoroondaraVIC 3122Australia Department of Orthopedics Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityJinganShanghai 200072China

Massive hemorrhage may be detrimental to the patients,which necessitates the advent of new materials with high hemostatic efficiency and good *** objective of this research was to screen for the effect of the different types of bio-elastomers as hemostatic dressings.3D loose nanofiber sponges were prepared;pU-TA/Gel showed promising ***(pU)was synthesized and electrospun to afford porous sponges,which were crosslinked with glutaraldehyde(GA).FTIR and 1H-NMR evidenced the successful synthesis of *** prepared pU-TA/Gel sponge had the highest porosity and water absorption ***,pU-TA/Gel sponges exhibited cytocompatibility,negligible hemolysis and the shortest clotting ***-TA/Gel sponge rapidly induced stable blood clots with shorter hemostasis time and less bleeding volume in a liver injury model in ***,pU-TA/Gel sponges also induced good skin regeneration in a full-thickness excisional defect model as revealed by the histological *** results showed that the pU-TA/Gel-based sponges may offer an alternative platform for hemostasis and wound healing.

关键词： polyurethane electrospinning hemostasis material wound healing tissue regeneration regenerative medicine

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Enhanced performance of monocrystalline silicon solar cells using sol-gel synthesized zinc stannate anti-reflective coating via electro-spraying technique

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Ceramics International 2025年第8期51卷 10899-10912页

作者： Mostafa, Ayman M. Velu Kaliyannan, Gobinath Gunasekaran, Raja El-Tayeb, Zaynb Rao, subha Krishna Al-Ahmadi, Ameenah N. Darwish, A.A.A. Younes, Ayman A.O. Elsharkawy, Wafaa B. palaniappan, sathish Kumar Department of Physics College of Science Qassim University P.O. Box 6644 Almolaydah Buraydah51452 Saudi Arabia Department of Mechatronics Engineering Kongu Engineering College Perundurai Tamil Nadu Erode638060 India Department of Mechanical Engineering Velalar College of Engineering and Technology Tamil Nadu Erode638012 India Department of Physics Faculty of Science Taibah University Yanbu46423 Saudi Arabia Centre for Nanoscience and Nanotechnology International Research Centre Sathyabama Institute of Science and Technology Tamil Nadu Chennai600119 India Department of Physics College of Sciences Umm Al-Qura University Makkah24382 Saudi Arabia Advanced Materials Research Laboratory Department of Physics Faculty of Science University of Tabuk Tabuk71491 Saudi Arabia Department of Chemistry College of Science University of Bisha Bisha 61922 Saudi Arabia Pysics Department College of Science and Humanities Prince Sattam Bin Abdulaziz University Alkharj11942 Saudi Arabia Natural Composites Research Group Lab Department of Materials and Production Engineering The Sirindhorn International Thai-German Graduate School of Engineering King Mongkut's University of Technology North Bangkok Bangsue Bangkok10800 Thailand

The current situation necessitates advancements in renewable energy to serve as a viable alternative to traditional energy sources. The photovoltaic cells can entirely change the need for fossil fuels since they can transform light energy into electrical energy. The reflection loss in photovoltaic cells is a contributing factor to reduced power conversion efficiency that could be mitigated by using antireflective coatings on the surface of the solar cells. This study examines the deposition of zinc stannate (ZnsnO3) as an efficient antireflective material to improve light capturing capability and it is synthesized by sol-gel method. The electro spraying method was employed to deposit the ZnsnO3 layers on photovoltaic cells. The ZnsnO3 AR material was uniformly distributed on the solar substrate at 2 ml/h for 1 h (Z1), 2 h (Z2), 3 h (Z3) and 4 h (Z4) respectively. The impact of ZnsnO3 ARC on the structural, electrical, absorbance, reflectance characteristics and temperature variation in monocrystalline silicon (m-si) solar cells was examined. The optical properties were determined by UV–visible spectroscopy technique. At a wavelength (300–800 nm), the ZnsnO3 coated for 3 h (Z3 specimen) exhibited highest absorbance of 92.65 % and the lowest electrical resistivity of 3.69 × 10−3 Ω-cm. When compared with bare and various ZnsnO3 coated cells, Z3 specimen showed a significant impact on solar cell efficiency. In direct solar radiation and stimulated light, the Z3 specimen achieved the maximum power conversion efficiency (pCE) of 21.16 % and 25.11 %. The findings indicated that ZnsnO3 could be a suitable AR coating material for reducing incoming photon reflection. © 2025 Elsevier Ltd and Techna Group s.r.l.

关键词： Antireflection coatings

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Accelerating Degradable Composite Breakdown Using Citrus processing side streams

ACS Sustainable Resource Management

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ACs sustainable Resource Management 2024年第2期1卷 344-354页

作者： Aline V. Duarte Laís T. possari Lívia M. G. Gonçalves Baltus C. Bonse Talita R. Rigolin sílvia H. p. Bettini Graduate Program in Materials Science and Engineering Federal University of Sao Carlos Rod. Washington Luiz 235 São Carlos 13565-905 Brazil Department of Materials Engineering Centro Universitário FEI 09850-901 São Bernardo do Campo Brazil Department of Materials Engineering Federal University of Sao Carlos Rod. Washington Luiz 235 São Carlos 13565-905 Brazil

Daily, vast amounts of waste are produced in the orange juice industry, a large part of which is reused in low-added-value products. In this work, orange vesicle fiber residues from the juice sieving stage were plasticized by extrusion, producing a thermoplastic citrus pulp (TCp). This pulp was incorporated into poly(butylene succinate) (pBs) at up to 50 wt %. The influence of TCp on the molar mass, morphology, tensile properties, rheological behavior, and biodeterioration of pBs in soil was evaluated. Highly flexible compounds with elongations similar to those of pBs were produced. scanning electron microscopy analyses suggested good dispersion between the TCp and pBs phases, verified after acid extraction of pectin. Rheological analyses indicated the presence of strong interactions in the interconnected network formed by pectin gel, percolation of TCp lignocellulosic fibers, or both. Analyses of mass loss by burial in soil showed that the higher the TCp content in pBs is, the higher and faster the biodeterioration is. size exclusion chromatography analyses indicated that the greater the concentration of TCp and the better dispersed it was in the compounds, the lower molar masses populations appeared in pBs, indicating higher rates of degradation of pBs in the presence of TCp. This innovative approach not only reuses the waste produced in the orange juice industry but also demonstrates the potential for obtaining environmentally friendly compounds.

关键词： Beverages Carbohydrates Fibers polymers soils

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sodium niobate with high photocatalytic activity for the removal of organic dye and inactivation of Escherichia coli, staphylococcus aureus, and Klebsiella pneumoniae bacteria: the effect of Zn doping on these properties

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Ceramics International 2025年

作者： Fernandes, Daiane Raubach, Cristiane Trassante, Carla Dias, Vagner Melo, Luize silveira, Marcelle Carvalho, Ramon Moreira, Mario Jardim, pedro Ferrer, Mateus Giongo, Janice Vaucher, Rodrigo Longo, Elson Cava, sergio Post-Graduate Program in Materials Science and Engineering Federal University of Pelotas RS Pelotas96010-610 Brazil Post-Graduate Program in Microbiology and Parasitology Federal University of Pelotas RS Capão do Leão96160-000 Brazil Post-Graduate Program in Physics Federal University of Pelotas RS Capão do Leão96160-000 Brazil Functional Materials Development Center São Carlos Federal University SP São Carlos13565-905 Brazil

NaNbO3 doped with Zn (0.00, 0.02, and 0.05 mmol) was synthesized by the microwave-assisted hydrothermal method. photocatalytic and antibacterial activities were investigated. X-ray diffraction revealed the coexistence of two orthorhombic symmetries (p21ma and pbma), with doping promoting a progressive increase in the pbma fraction. All samples exhibited a fiber-like shape (diameter of ∼200 nm), which remained unchanged with doping. The low Zn content (0.02 mmol) reduced the band gap energy from 3.08 to 2.95 eV. As a result, this sample exhibited superior photocatalytic activity, achieving 100 % RhB dye degradation within 45 min, under UV light. scavenger tests revealed that hydroxyl radicals, holes, and superoxide radical anions were the main active species involved in the photocatalytic reaction. Additionally, the photocatalyst demonstrated excellent recyclability over three consecutive cycles. pure NaNbO3 exhibited strong antibacterial activity, completely inhibiting the growth of s. aureus, E. coli, and K. pneumoniae at the tested concentrations. Although the Zn-doped sample also demonstrated antibacterial action, the response was concentration-dependent. This study is the first report on Zn doping in NaNbO3, as well as the first investigation of its antibacterial activity against K. pneumoniae and s. aureus. © 2025 Elsevier Ltd and Techna Group s.r.l.

关键词： Escherichia coli

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Hydrogen storage properties of the Ti18V24Nb23Cr33Al2Multicomponent Alloy Using Ti6V4Al Alloy scraps as Feedstock Material

ACS Sustainable Resource Management

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ACs sustainable Resource Management 2025年第5期2卷 807-814页

作者： Mariana de Brito Ferraz Claudia Zlotea Walter José Botta Guilherme Zepon Federal University of São Carlos Graduate Program in Materials Science and Engineering (PPGCEM/UFSCar) Rodovia Washington Luiz Km 235 São Carlos 13565-905 São Paulo Brazil Institut de Chimie et des Matériaux de Paris-Est CNRS UMR 7182 2-8 Rue Henri Dunant 94320 Thiais France Federal University of São Carlos Graduate Program in Materials Science and Engineering (PPGCEM/UFSCar) Rodovia Washington Luiz Km 235 São Carlos 13565-905 São Paulo Brazil；Federal University of São Carlos Department of Materials Engineering (DEMa/UFSCar) Rodovia Washington Luiz Km 235 São Carlos 13565-905 São Paulo Brazil

Hydrogen storage in metal hydrides has been extensively studied due to their capacity to reversibly absorb hydrogen under relatively low pressures. Multicomponent alloys, especially those of the Ti-V-Nb-Cr system, have garnered significant attention because of the possibility of fine-tuning the hydrogen storage properties by compositional control. However, most of the investigations on multicomponent alloys rely on high-purity elements as feedstock materials, which can have a substantial environmental impact due to the energy-intensive processes required to achieve such purity levels. In this work, we propose an alternative approach by utilizing Ti6Al4V alloy (AsTM F136) scraps from the biomedical industry as feedstock material to produce Ti18Nb23V24Cr33Al2. The alloy was synthesized by using an arc-melting process, combining Ti6Al4V scraps with other pure elements. structural analysis using X-ray diffraction (XRD) and scanning electron microscopy (sEM) revealed the formation of a microstructure composed predominantly by a body-centered cubic (BCC) solid solution with a small micro segregation providing additional microstructural insights. The Ti18Nb23V24Cr33Al2alloy exhibited a hydrogen storage capacity of 2.75 wt % H2with room temperature reversibility, presenting hydrogen storage properties comparable to those of a (TiVNb)65Cr35alloy produced only from high-purity *** study presents a sustainable approach to producing Ti18Nb23V24Cr33Al2alloy from Ti6Al4V machine chips, achieving efficient hydrogen storage with reduced environmental impact.

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