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2018 International mechanical and industrial engineering Conference, IMIEC 2018

作者： Sukarni, Sukarni Prasetiyo, Ardianto Sumarli, Sumarli Nauri, Imam Muda Permanasari, Avita Ayu Center for Renewable and Sustainable Energy Engineering Department of Mechanical Engineering State University of Malang Malang65145 Indonesia Master Program of Mechanical Engineering Graduate School State University of Malang Malang East Java65145 Indonesia

Thermogravimetric analyzer had been occupied to investigate the behavior of co-combustion between microalgae Spirulina platensis and synthetic waste. The powder of microalgae and synthetic waste were mixed in the same ratio of 50/50. Around 10 mg of the sample was heated up in the chamber under air atmosphere flowrate of 100 ml/min at a heating rate of 10 °C/min. The results showed that the sample blend is undergoing thermal degradation in the three stages. The most massive reaction occurred in the second stage in which around 74% of the mass degraded and combusted. The activation energy in the main combustion reaction zone according to the method of Horowitz-Metzger was 57.77 kJ/mol. © The Authors, published by EDP Sciences, 2018.

关键词： Microalgae

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Failure model for bioactive degradable composite 2

Failure model for bioactive degradable composite

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2nd International Conference on Eco engineering Development 2018, ICEED 2018

作者： Bahril, N.H.S. Sahroni, T.R. Mustafa, Z. Faculty of Manufacturing Engineering Universiti Teknikal Malaysia Melaka Hang Tuah Jaya Durian Tunggal Melaka76100 Malaysia Industrial Engineering Department Binus Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta11480 Indonesia

This paper presents the failure model for bioactive degradable composite due to degradation in saline solution using static structural. The composite material is chosen as the material for analysis. Composite has specified into polylactide acid (PLA) that have pointed to two different kinds of temperatures of 140° C and 150° C. Then, each one of the materials given different percentage UTS where it is divided into three classes with 2 %, 50%, and 75%. Each class is imposed six forces 500N, 600N, 700N, 800N, 900N, and 1000N. The objective is to determine the durability of the materials and how long it can be used. Furthermore, the purpose of this project is to analyses the factor of safety of using Static Structural. Therefore, all data and information related to this project have been sought and recorded in the literature review. Simulation and analysis applied in this project are using ANSYS software. SolidWorks software is used as a CAD software to construct three-dimensional models for the design of the specimen. Static Structural used to simulate the structure of the material changes when a load is applied. Static Structural analysis has been carried out on both types of material and results are calculated based on three parameters such as the life cycles, damage, the factor of safety and buckling. Another goal of this project is to design a model for composite failure analysis. Referring to the results obtained from the analysis, the best composite materials selected to make some comparisons with regard to the material safety factor. © 2018 Institute of Physics Publishing. All rights reserved.

关键词： Failure (mechanical)

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An improved explicit scheme for whole-building hygrothermal simulation

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建筑模拟（英文版） 2018年第3期11卷 465-481页

作者： Suelen Gasparin Julien Berger Denys Dutykh Nathan Mendes Thermal Systems Laboratory Mechanical Engineering Graduate Program Pontifical Catholic University of Paraná Rua Imaculada Concei??o 1155 Curitiba - Paraná 80215-901 Brazil LAMA UMR 5127 CNRS Université Savoie Mont Blanc Campus Scientifique 73376 Le Bourget-du-Lac Cedex France Université Savoie Mont Blanc CNRS LOCIE F-73000 Chambéry France LAMA UMR 5127 CNRS Université Savoie Mont Blanc Campus Scientifique 73376 Le Bourget-du-Lac Cedex France Thermal Systems Laboratory Mechanical Engineering Graduate Program Pontifical Catholic University of Paraná Rua Imaculada Concei??o 1155 Curitiba - Paraná 80215-901 Brazil

Implicit schemes require important sub-iterations when dealing with highly nonlinear problems such as the combined heat and moisture transfer through porous building elements. The computational cost rises significantly when the whole-building is simulated, especially when there is important coupling among the building elements themselves with neighbouring zones and with HVAC (heating ventilation and air conditioning) systems. On the other hand, the classical Euler explicit scheme is generally not used because its stability condition imposes very fine time discretisation. Hence, this paper explores the use of an improved explicit approach—the DuFort–Frankel scheme—to overcome the disadvantage of the classical explicit one and to bring benefits that cannot be obtained by implicit methods. The DuFort–Frankel approach is first compared to the classical Euler implicit and explicit schemes to compute the solution of nonlinear heat and moisture transfer through porous materials. Then, the analysis of the DuFort–Frankel unconditionally stable explicit scheme is extended to the coupled heat and moisture balances on the scale of a one- and a two-zone building models. The DuFort–Frankel scheme has the benefits of being unconditionally stable, second-order accurate in time O(Δt2) and to compute explicitly the solution at each time step, avoiding costly sub-iterations. This approach may reduce the computational cost by twenty as wel as it may enable perfect synchronism for whole-building simulation and co-simulation.

关键词： heat and moisture transfer numerical methods finite-differences explicit schemes DuFort–Frankel scheme whole-building simulation

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Image-guided targeting of mitochondrial metabolism sensitizes pediatric malignant rhabdoid tumors to low-dose radiotherapy

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Science advances 2025年第21期11卷 eadv2930页

作者： Wenxi Xia Esther Need Carmine Schiavone Neetu Singh Jiemin Huang Matthew Goff Joseph Cave David L Gillespie Randy L Jensen Mark D Pagel Prashant Dogra Sixiang Shi Shreya Goel Department of Molecular Pharmaceutics University of Utah Salt Lake City UT 84112 USA. Mathematics in Medicine Program Department of Medicine Houston Methodist Research Institute Houston TX 77030 USA. Department of Chemical Materials and Industrial Production Engineering University of Naples Federico II Naples Italy. Physiology Biophysics and Systems Biology Program Graduate School of Medical Sciences Weill Cornell Medicine New York NY 10065 USA. Department of Neurosurgery Huntsman Cancer Institute University of Utah Salt Lake City UT 84132 USA. Department of Medical Physics University of Wisconsin-Madison Madison WI 53705 USA. Department of Physiology and Biophysics Weill Cornell Medical College New York NY 10065 USA. Department of Radiology and Imaging Sciences University of Utah Salt Lake City UT 84112 USA. Department of Biomedical Engineering University of Utah Salt Lake City UT 84112 USA.

Tumor hypoxia leads to radioresistance and markedly worse clinical outcomes for pediatric malignant rhabdoid tumors (MRTs). Our transcriptomics and bioenergetic profiling data reveal that mitochondrial oxidative phosphorylation is a metabolic vulnerability of MRT and can be exploited to overcome consumptive hypoxia by repurposing an FDA-approved antimalarial drug, atovaquone (AVO). We then establish the utility of oxygen-enhanced-multispectral optoacoustic tomography, a label-free, ionizing radiation-free imaging modality, to visualize and quantify spatiotemporal changes in tumor hypoxia in response to AVO. We show a potent but transient increase in tumor oxygenation upon AVO treatment that results in complete elimination of tumors in all tested mice when combined with 10-gray radiotherapy, a dose several times lower than the current clinic standard. Last, we use translational mathematical modeling for systematic evaluation of dosing regimens, administration timing, and therapeutic synergy in a virtual patient cohort. Together, our work establishes a framework for safe and pediatric patient-friendly image-guided metabolic radiosensitization of rhabdoid tumors.

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Wear behavior of dental glass-ceramics: a scoping review on the damage of opposing tooth enamel surfaces

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Biotribology 2020年 21卷

作者： Souza, Júlio C.M. Silva, Cristina S. Caramês, João Henriques, Bruno Novaes de Oliveira, Antonio P. Silva, Filipe S. Gomes, José R. Center for MicroElectroMechanical Systems (CMEMS-UMINHO) University of Minho Campus Azurém Guimarães 4800-058 Portugal University Institute of Heal Sciences (IUCS) CESPU Gandra PRD Portugal School of Dentistry Universidade de Lisboa Lisboa Portugal Post-Graduate Program in Mechanical Engineering (POSMEC) Dept. of Mechanical Engineering (EMC) Federal University of Santa Catarina (UFSC) Florianópolis 88040-900 SC Brazil Laboratory of Glass-Ceramic Materials (VITROCER) Dept. of Mechanical Engineering (EMC) Federal University of Santa Catarina (UFSC) Florianópolis SC Brazil

The main aim of this study was to perform a scoping review on the wear behaviour of recent dental glass-ceramics and its influence on the damage of opposing tooth enamel surfaces. Relevant in vivo and in vitro studies reported significant damage on enamel surfaces after friction against current glass-ceramics and therefore different parameters have been studied such as the glass-ceramic type, wear set up, environment, and surface treatment. The opposing enamel loss in volume, weight, or vertical measurement shown by previous studies is significantly higher when compared to enamel-by-enamel wear values. In fact, high values of hardness and elastic modulus of glass-ceramics combined with rough surfaces can result in detrimental effects on the tooth enamel surfaces. Restorative dental materials must withstand masticatory loads in combination with aesthetic benefits and high biocompatibility. Nevertheless, elastic modulus, hardness, and roughness of glass-ceramics should be adjusted to decrease the damage on tooth enamel surfaces. © 2020 Elsevier Ltd

关键词： Friction Glass-ceramics Restorative dental materials Wear

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ELSA-Py - Open-Source Extension for Communication and Data Management in Interactive Remote Experimentation Under Ilab Shared Architecture

ELSA-Py - Open-Source Extension for Communication and Data M...

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APCA International Conference on Automatic Control and Soft Computing (CONTROLO)

作者： Thiago Schaedler Uhlmann Pedro Henrique Dos Santos Sbais Luciano Antonio Mendes Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Parana Curitiba Brazil

Paper depicts an architecture expansion for communication and data management that can be used in Remote Experimentation and Game-Based Learning. This architecture is compliant with iLab Shared Architecture and is based upon open source software and hardware, in particular low cost platforms such as the Raspberry Pi 3. It consists of three main entities: user-side interface, experiment-side (lab) application and, interconnecting both, the cloud server enhanced with the messaging intermediator. Architecture takes into account typical requirements for educational institutions, such as open-source technologies, remote systems usage management (service brokerage) and security. In trial implementations, three single-user, remotely operated experiments have been enabled using ELSA-Py, in which students will be able to practice concepts of lean production (LyMIE), object position control (Windball) and image calibration (TabRecon). The integration has been tested and the performance of ELSA-Py architecture as a tool do deploy educational remotely operated systems is discussed.

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Progress in silicon-based materials for emerging solar-powered green hydrogen (H2) production

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Advances in colloid and interface science 2025年 343卷 103558页

作者： Aminul Islam Md Tarekul Islam Siow Hwa Teo Hasan Mahmud A M Swaraz Ariyan Islam Rehan Adiba Islam Rasee Khadiza Tul Kubra Md Munjur Hasan Md Shad Salman R M Waliullah Md Nazmul Hasan Md Chanmiya Sheikh Tetsuya Uchida Mrs Eti Awual Mohammed Sohrab Hossain Hussein Znad Md Rabiul Awual Department of Petroleum and Mining Engineering Jashore University of Science and Technology Jashore 7408 Bangladesh Hydrogen energy and CO(2) conversion Lab Department of Petroleum and Mining Engineering Jashore University of Science and Technology Jashore 7408 Bangladesh College of Engineering Korea University 145 Anam-ro Seongbuk-gu Seoul 02841 Republic of Korea. Electronic address: aminul_pme@just.edu.bd. Department of Leather Engineering Faculty of Mechanical Engineering Khulna University of Engineering and Technology Khulna 9203 Bangladesh. Industrial Chemistry Program Faculty of Science and Natural Resources Universiti Malaysia Sabah 88400 Kota Kinabalu Sabah Malaysia. Bangladesh Energy and Power Research Council (BEPRC) IEB Bhaban (11(th) Floor) Ramna Dhaka 1000 Bangladesh. Department of Genetic Engineering and Biotechnology Jashore University of Science and Technology Jashore 7408 Bangladesh. Department of Chemistry School of Science The University of Tokyo 7-3-1 Bunkyo-ku Tokyo 113-0033 Japan. Department of Chemistry Graduate School of Science Osaka University Osaka 560-0043 Japan. Electronic address: adiba.islam@***. Department of Chemistry Graduate School of Science Osaka University Osaka 560-0043 Japan. Department of Chemistry Graduate School of Science Osaka University Osaka 560-0043 Japan. Electronic address: munjur.hasan@***. Institute for Chemical Research Kyoto University Gokasho Uji Kyoto 611-0011 Japan. Institute for Chemical Research Kyoto University Gokasho Uji Kyoto 611-0011 Japan. Electronic address: r.waliullah@***. Division of Applied Chemistry Graduate School of Natural Science and Technology Okayama University 1-1 Tsushima-naka 3-Chome Okayama 700-8530 Japan. Electronic address: chanmiya.sheikh@***. Division of Applied Chemistry Graduate School of Natural Science and Technology Okayama University 1-1 Tsushima-naka 3-Chome Okayama 700-8530 Japan. Department of Chemistry Graduate School of Science Osaka University Osak

The imperative demand for sustainable and renewable energy solutions has precipitated profound scientific investigations into photocatalysts designed for the processes of water splitting and hydrogen fuel generation. The abundance, low toxicity, high conductivity, and cost-effectiveness of silicon-based compounds make them attractive candidates for hydrogen production, driving ongoing research and technological advancements. Developing an effective synthesis method that is simple, economically feasible, and environmentally friendly is crucial for the widespread implementation of silicon-based heterojunctions for sustainable hydrogen production. Balancing the performance benefits with the economic and environmental considerations is a key challenge in the development of these systems. The specific performance of each catalyst type can vary depending on the synthesis method, surface modifications, catalyst loading, and reaction conditions. The confluence of high crystallinity, reduced oxygen concentration, and calcination temperature within the silicon nanoparticle has significantly contributed to its noteworthy hydrogen evolution rate. This review provides an up-to-date evaluation of Si-based photocatalysts, summarizing recent developments, guiding future research directions, and identifying areas that require further investigation. By combining theoretical insights and experimental findings, this review offers a comprehensive understanding of Si-based photocatalysts for water splitting. Through a comprehensive analysis, it aims to elucidate existing knowledge gaps and inspire future research directions towards optimized photocatalytic performance and scalability, ultimately contributing to the realization of sustainable hydrogen generation.

关键词： Clean and renewable energy Hydrogen Silicon-based materials Sustainable Water splitting

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Multi-objective Support Vector Machines Ensemble Generation for Water Quality Monitoring

Multi-objective Support Vector Machines Ensemble Generation ...

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Congress on Evolutionary Computation

作者： Victor Henrique Alves Ribeiro Gilberto Reynoso-Meza Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Parana (PUCPR) Curitiba Brazil

Real-world classification problems generally deal with imbalanced data, where one class represents the majority of the data set. The present work deals with event detection on a drinking-water quality time series, where the presence of a quality event is the minority class. In order to solve such problems, supervised learning algorithms are recommended. Researchers have also used multi-objective optimization (MOO) in order to generate diverse models to build ensembles of classifiers. Although MOO has been used for ensemble member generation, there is a lack on it's application for member selection, which is usually done by selecting a specific subset from the resulting models, or by using meta-algorithms, such as boosting. The proposed work comprises the application of MOO design in the whole process of ensemble generation. To do so, one multi-objective problem (MOP) is defined for the creation of a set of non-dominated solutions with Pareto-optimal support vector machines (SVM). After that, a second MOP is defined for the selection of such SVMs as members of an ensemble. Such methodology is compared to other member selection methods, such as: the single best classifier, an ensemble composed of the full set of non-dominated solutions, and the selection of a specific subset from the Pareto front. Results show that the proposed method is suitable for the creation of ensembles, achieving the highest classification scores.

关键词： Support vector machines Optimization Mood Training Event detection Kernel Supervised learning

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Multi-objective PID Controller Tuning for an industrial Gasifier

Multi-objective PID Controller Tuning for an Industrial Gasi...

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Congress on Evolutionary Computation

作者： Victor Henrique Alves Ribeiro Gilberto Reynoso- Meza Industrial and Systems Engineering Graduate Program Pontifical Catholic University of Paraná (PUCPR) Curitiba Brazil

Control of industrial plants is an important engineering field of study, where the optimization of such processes can lead to better product quality and higher profit. The present work deals with the optimization of an industrial gasifier, proposed as a benchmark challenge by ALSTOM Power Technologies in 2002. Researchers from around the globe proposed different methods for optimizing such system, using linear and nonlinear system identification techniques, different controller schemes, such as proportional-integral-derivative and model predictive controllers, and search methods for controller tuning. The authors care for the study of a methodology that can generalize the controller optimization process of real industrial systems, where linear system identification can lead to simpler systems, which are used to design more robust controllers. The proposed work deals with linear system identification and multiobjective optimization for the gasifier's controller design. To do so, the authors divide the problem in two steps, the linear system identification, where step functions are fed to the gasifier in order to detect the output response of the system, and the design of a proportional-integral-derivative controller, where spherical pruned multi-objective differential evolution algorithm is used in order to optimize the controller gains. The proposed method, unfortunately, does not provide an optimal controller, which can be explained by the complexity of the benchmark system. With such results, the authors believe a better multi-objective problem definition is necessary. Also, it is concluded that such benchmark presents a real challenge for future controller design methndologies.

关键词： Optimization Process control Benchmark testing Tuning PD control Genetic algorithms

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Thermal stability of magnesium fabricated by combination of mechanical milling and spark plasma sintering

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Keikinzoku/Journal of Japan Institute of Light Metals 2019年第10期69卷 485-492页

作者： Kubota, Masahiro Hagino, Toshiki Department of Mechanical Engineering College of Industrial Technology Nihon University 1-2-1 Izumi-cho Narashino-shi Chiba275-8575 Japan Graduate School of Industrial Technology Nihon University Narashino-shi Chiba Japan Toshiba Plant Systems and Services Corporation Japan

Pure magnesium powders together with 0.5 g of process control agent were mechanically milled (MM) using a planetary type of ball mill with different processing times. MMed powders were consolidated into bulk materials by the spark plasma sintering (SPS). Changes in hardness and solid-state reactions of the SPS materials before and after isochronal and isothermal heating at 473 K, 523 K and 573 K have been examined by hardness measurements and an X-ray diffraction. Enhanced hardness was observed in the SPS materials fabricated from MMed 32 h powder after heating at 523 K for 8 h. The value of Vickers hardness in the SPS materials during heating at 523 K increased from 48 to 91 HV, suggesting that hardening ability was 43 HV. Solid-state reaction was clearly observed in all SPS materials fabricated from MMed powders produced with the different MM time after heating at 473 K, 523 K and 573 K. The contribution for enhancement of hardness in the SPS materials was attributable from formation of MgO, MgH2, and Mg(OH)2, typically from MgO. The thermal stability of pure magnesium can be improved by MM-SPS process. © 2019 The Japan Institute of Light Metals.

关键词： Spark plasma sintering

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