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Virtual additive manufacturing based on semicrystalline polymer polyetheretherketone (PEEK)

Engineering Transactions 2019年第2期67卷 157-165页

作者： Bajerski, Pawel Pęcherski, Ryszard B. Chudy, Damian ABB Sp. z o.o. Corporate Research Center Starowiślna 13A Kraków31-038 Poland AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Al. Mickiewcza 30 Kraków30-059 Poland

Virtual additive manufacturing (AM) is one of the new directions of research that is nec-essary to improve AM technology. Abaqus/SIMULIA software allows to simulate the whole process using user subroutines to expand solver capabilities. Two of the most important subroutines are UepActivationVol and UMATHT. The UepActivationVol is related to an activation of elements in accordance with the defined path of the process. The second one the UMATHT is used to implement and combine thermal and crystallization process [2]. The presented investigations describe the dual crystallization kinetics model for considered high temperature thermoplastic material Polyetheretherketone (PEEK). Furthermore, it is shown how to analyse the overall process with use of Abaqus/SIMULIA software. The innovation of the presented approach lies in the proper interpreting of the G-Code from Computer-aided manufacturing software (CAM), which is an input for the real machines dedicated to AM. The path (coordinates of discrete points) and time of particular steps of the manufacturing process are extracted from the G-Code and are included as input parameters in the simulation code. The discretized part is simplification of the Computer-aided design (CAD) geometry. The final results show the effect implemented in user subroutines. Additionally, Differential Scanning Calorimetry (DSC) test results are presented in order to calculate crystallization and melting parameters. The presented work is the basis of the following investigations covering prediction of residual stresses, volumetric shrinkage and deformations. © 2019, Polish Academy of sciences. All rights reserved.

关键词： Differential scanning calorimetry

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Calculations of the steam boiler operation factors under varying operating conditions using a thermodynamics modeling 32

Calculations of the steam boiler operation factors under var...

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32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2019

作者： Madejski, Pawel Żymelka, Piotr AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics Department of Power Systems and Environmental Protection Facilities Kraków Poland PGE Energia Ciepla S.A. Production Economics Department Rybnik Poland Silesian University of Technology Faculty of Energy and Environmental Engineering Institute of Thermal Technology Gliwice Poland

ISBN: (纸本)9788361506515

The paper presents results of a steam boiler operation modeling fired with hard coal. The thermodynamic model developed is consisted of basic components of the steam boiler for both the flue gases-air and water-steam circuits. The results in the form and steam temperature distributions have been verified with available boiler measurement data. The developed model in the Ebsilon software allows performing calculations for variable input conditions in order to enable the basic parameters of the boiler operation. In the presented work the possibility of identifying the changing properties of the fuel burned in the boiler and its impact on operating conditions was verified. Simulations were carried out for variable boiler operating conditions such as fuel quality and quantity, and variable load. The results were presented in the form of total boiler efficiency and boiler losses. To analyzed boiler performance, an energetic and exergetic efficiency of the boiler was calculated using the developed procedure. The analysis consists of boiler operation simulations for different coal and at different partial load. © ECOS 2019 - Proceedings of the 32nd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems. All rights reserved.

关键词： Energy efficiency

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Indicators to assess physiological heat strain–Part 2: Delphi exercise

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Temperature 2022年第3期9卷 263-273页

作者： Ioannou, Leonidas G. Dinas, Petros C. Notley, Sean R. Gofa, Flora Gourzoulidis, George A. Brearley, Matt Epstein, Yoram Havenith, George Sawka, Michael N. Bröde, Peter Mekjavic, Igor B. Kenny, Glen P. Bernard, Thomas E. Nybo, Lars Flouris, Andreas D. FAME Laboratory Department of Physical Education and Sport Science University of Thessaly Trikala Greece Department of Nutrition Exercise and Sports August Krogh Building University of Copenhagen Copenhagen Denmark Human and Environmental Physiology Research Unit Faculty of Health Sciences University of Ottawa Ottawa ON Canada Hellenic National Meteorological Service Athens Greece Hellenic Ministry of Labour and Social Affairs Athens Greece National Critical Care and Trauma Response Centre Royal Darwin Hospital Darwin NT Australia Thermal Hyperformance Pty Ltd Takura Australia Heller Institute of Medical Research Sheba Medical Center Ramat Gan and the Sackler Faculty of Medicine Tel Aviv University Israel Environmental Ergonomics Research Centre Loughborough Design School Loughborough University Loughborough United Kingdom School of Biological Sciences Georgia Institute of Technology Atlanta GA United States Department of Immunology Leibniz Research Centre for Working Environment and Human Factors (IfADO) Dortmund Germany Department of Automation Biocybernetics and Robotics Jozef Stefan Institute Ljubljana Slovenia Clinical Epidemiology Program Ottawa Hospital Research Institute Ottawa ON Canada College of Public Health University of South Florida Tampa FL United States

In a series of three companion papers published in this Journal, we identify and validate the available thermal stress indicators (TSIs). In this second paper of the series, we identified the criteria to consider when adopting a TSI to protect individuals who work in the heat, and we weighed their relative importance using a Delphi exercise with 20 experts. Two Delphi iterations were adequate to reach consensus within the expert panel (Cronbach’s α = 0.86) for a set of 17 criteria with varying weights that should be considered when adopting a TSI to protect individuals who work in the heat. These criteria considered physiological parameters such as core/skin/mean body temperature, heart rate, and hydration status, as well as practicality, cost effectiveness, and health guidance issues. The 17 criteria were distributed across three occupational health-and-safety pillars: (i) contribution to improving occupational health (55% of total importance), (ii) mitigation of worker physiological strain (35.5% of total importance), and (iii) cost-effectiveness (9.5% of total importance). Three criteria [(i) relationship of a TSI with core temperature, (ii) having categories indicating the level of heat stress experienced by workers, and (iii) using its heat stress categories to provide recommendations for occupational safety and health] were considered significantly more important when selecting a TSI for protecting individuals who work in the heat, accumulating 37.2 percentage points. These 17 criteria allow the validation and comparison of TSIs that presently exist as well as those that may be developed in the coming years. © 2022 Informa UK Limited, trading as Taylor & Francis Group.

关键词： Consensus criteria heat indices heat strain hyperthermia labor occupational temperature thermal indices work

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Indicators to assess physiological heat strain–Part 1: Systematic review

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Temperature 2022年第3期9卷 227-262页

作者： Ioannou, Leonidas G. Mantzios, Konstantinos Tsoutsoubi, Lydia Notley, Sean R. Dinas, Petros C. Brearley, Matt Epstein, Yoram Havenith, George Sawka, Michael N. Bröde, Peter Mekjavic, Igor B. Kenny, Glen P. Bernard, Thomas E. Nybo, Lars Flouris, Andreas D. FAME Laboratory Department of Physical Education and Sport Science University of Thessaly Trikala Greece Department of Nutrition Exercise and Sports August Krogh Building University of Copenhagen Denmark Human and Environmental Physiology Research Unit Faculty of Health Sciences University of Ottawa ON Canada National Critical Care and Trauma Response Centre Royal Darwin Hospital Northern Territory Darwin Australia Thermal Hyperformance Pty Ltd Takura QLD Australia Heller Institute of Medical Research Sheba Medical Center Ramat Gan and the Sackler Faculty of Medicine Tel Aviv University Israel Environmental Ergonomics Research Centre Loughborough Design School Loughborough University Loughborough United Kingdom School of Biological Sciences Georgia Institute of Technology Atlanta GA United States Department of Immunology Leibniz Research Centre for Working Environment and Human Factors (IfADo) Dortmund Germany Department of Automation Biocybernetics and Robotics Jozef Stefan Institute Ljubljana Slovenia Clinical Epidemiology Program Ottawa Hospital Research Institute Ottawa Canada College of Public Health University of South Florida 13201 Bruce B Downs Boulevard Tampa 33612 FL United States

In a series of three companion papers published in this Journal, we identify and validate the available thermal stress indicators (TSIs). In this first paper of the series, we conducted a systematic review (registration: INPLASY202090088) to identify all TSIs and provide reliable information regarding their use (funded by EU Horizon 2020;HEAT-SHIELD). Eight databases (PubMed, Agricultural and Environmental science Collection, Web of science, Scopus, Embase, Russian science Citation Index, MEDLINE, and Google Scholar) were searched from database inception to 15 April 2020. No restrictions on language or study design were applied. Of the 879 publications identified, 232 records were considered for further analysis. This search identified 340 instruments and indicators developed between 200 BC and 2019 AD. Of these, 153 are nomograms, instruments, and/or require detailed non-meteorological information, while 187 can be mathematically calculated utilizing only meteorological data. Of these meteorology-based TSIs, 127 were developed for people who are physically active, and 61 of those are eligible for use in occupational settings. Information regarding the equation, operating range, interpretation categories, required input data, as well as a free software to calculate all 187 meteorology-based TSIs is provided. The information presented in this systematic review should be adopted by those interested in performing on-site monitoring and/or big data analytics for climate services to ensure appropriate use of the meteorology-based TSIs. Studies two and three in this series of companion papers present guidance on the application and validation of these TSIs, to guide end users of these indicators for more effective use. © 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

关键词： exercise heat indices heat strain hyperthermia labour Occupational temperature thermal indices work

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Retraction notice to “Multi-scale experimental investigation on the fluidization of Geldart B 13X zeolite particles: A comprehensive dataset for CFD validation” [Chem. Eng. J. 471 (2023) 144724]

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Chemical Engineering Journal 2025年 510卷

作者： Mingming Ge Hang Zhou Avinash Vaidheeswaran William Rogers Dixia Fan Cheng Li National Observation and Research Station of Coastal Ecological Environments in Macao Macao Environmental Research Institute Faculty of Innovation Engineering Macau University of Science and Technology Macao SAR 999078 China School of Engineering Westlake University Hangzhou Zhejiang 310030 China National Energy Technology Laboratory 3610 Collins Ferry Road Morgantown WV 26505 USA Department of Mechanical Engineering (Robotics) Guangdong Technion - Israel Institute of Technology Shantou Guangdong 515063 China Department of Mechanical Engineering Technion-Israel Institute of Technology Haifa 3200003 Israel

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The study of arduino uno feasibility for DAQ purposes

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Diagnostyka 2019年第2期20卷 33–48页

作者： Barański, Robert Galewski, Marek A. Nitkiewicz, Szymon AGH University of Science and Technology Faculty of Mechanical Engineering and Robotics al. Mickiewicza 30 Kraków30-059 Poland Gdansk University of Technology Faculty of Mechanical Engineering str. G. Narutowicza 11/12 Gdansk80-233 Poland Warmia and Mazury University Faculty of Technical Sciences 11 Oczapowskiego St. Olsztyn10-710 Poland School of Medicine Collegium Medicum 30 Warszawska St. Olsztyn10-082 Poland

Using microcontroller systems becomes a routine in various measurement and control tasks. Their wide availability together with a huge potential of extending their functionality by additional modules allows developing advanced measuring and monitoring systems by non-specialists. However, using popular example codes often leads the user to pass over or not to be aware of the limitations of the system and drawing too far-reaching conclusions on the basis of incorrectly performed measurements This paper deals with the problem of choosing the right method for performing measurements using an acquisition system based on the budget Arduino UNO solution. The main assumption was to use the standard, widely available Arduino libraries. The work focuses on the scenario when data should be subject to time and frequency analysis in the later processing. The operating limits of the device were also determined depending on the data transmission method used. © 2019 Polish Society of Technical Diagnostics. All rights reserved.

关键词： Signal analysis

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Using micro- and macro-level network metrics unveils top communicative gene modules in psoriasis

arXiv

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arXiv 2020年

作者： Naderi, Reyhaneh Mollaei, Homa Saadati Elofsson, Arne Ashtiani, Saman Hosseini Department of Artificial Intelligence and Robotics Faculty of Computer Engineering Iran University of Science and Technology Tehran Iran Department of Advanced Sciences and Technology Islamic Azad University Medical Branch Tehran Iran Department of Biochemistry and Biophysics and Science for Life Laboratory Stockholm University Stockholm106 91 Sweden

Background: Psoriasis is a multifactorial chronic inflammatory disorder of the skin with significant morbidity, characterized by hyper proliferation of the epidermis. Even though psoriasis etiology is not fully understood, it is believed to be multifactorial with numerous key components. Methods: In order to cast light on the complex molecular interactions in psoriasis vulgaris at both protein-protein interactions and transcriptomics levels, we analyzed a set of microarray gene expression analysis consisting of 170 paired lesional and non-lesional samples. Afterwards, a network analysis was conducted on protein-protein interaction network of differentially expressed genes based on micro- and macro-level network metrics at a systemic level standpoint. Results: We found 17 top communicative genes, all of which experimentally proven to be pivotal in psoriasis were identified in two modules, namely, cell cycle and immune system. Intra- and inter-gene interaction subnetworks from the top communicative genes might provide further insight into the corresponding characteristic mechanisms. Conclusions: Potential gene combinations for therapeutic/diagnostics purposes were identified. Moreover, our proposed pipeline could be of interest to a broader range of biological network analysis *** Codes 92C42 Copyright © 2020, The Authors. All rights reserved.

关键词： Dermatology

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Method of sequential classification for pre-grouping hand movements classes for fast labeling process of an electromyographic signals

Method of sequential classification for pre-grouping hand mo...

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IEEE Symposium Series on Computational Intelligence (SSCI)

作者： Michal Bledowski Andrzej Wolczowski Chair of Cybernetics and Robotics Faculty of Electronics Wroclaw University of Science and Technology Wroclaw Poland

ISBN: (数字)9781728124858

ISBN: (纸本)9781728124865

The paper discusses the problem of the process of quick recognition and classification of electromyographic signals in order to control a robotic prosthetic hand. The work is based on the assumption that during the recording of the movement, the signal contains useful information from the initial acquisition of measurement data. They can be used for early grouping of movement classes into larger sets, giving preliminary information about the type of intentions of the movement and at the same time simplifying the labeling process at a later stage.

关键词： Feature extraction Labeling Robots Time measurement Electromyography Atmospheric measurements Particle measurements

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A Novel Big Data-Enabled Approach, Individualizing and Optimizing Brain Disorder Rehabilitation

Studies in Big Data

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Studies in Big Data 2019年 42卷 101-127页

作者： Janatova, Marketa Uller, Miroslav Stepankova, Olga Brezany, Peter Lenart, Marek Prague Czech Republic Robotics and Machine Perception Department CIIRC CTU Prague Czech Republic Biomedical Engineering and Assistive Technologies Department CIIRC CTU Prague Czech Republic Faculty of Computer Science University of Vienna Vienna Austria SIX Research Group Brno University of Technology Brno Czech Republic

Brain disorders occur when our brain is damaged or negatively influenced by injury, surgery, or health conditions. This chapter shows how the combination of novel biofeedback-based treatments producing large data sets with Big Data and Cloud-Dew Computing paradigms can contribute to the greater good of patients in the context of rehabilitation of balance disorders, a significant category of brain damage impairments. The underlying hypothesis of the presented original research approach is that detailed monitoring and continuous analysis of patient´s physiological data integrated with data captured from other sources helps to optimize the therapy w.r.t. the current needs of the patient, improves the efficiency of the therapeutic process, and prevents patient overstressing during the therapy. In the proposed application model, training built upon two systems, Homebalance—a system enabling balance training and Scope—a system collecting physiological data, is provided both in collaborating rehabilitation centers and at patient homes. The preliminary results are documented using a case study confirming that the approach offers a viable way towards the greater good of a patient. © Springer International Publishing AG, part of Springer Nature 2019.

关键词： Patient rehabilitation

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Performance and exergy analysis of an inclined solar still with baffle arrangements

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Heliyon 2023年第4期9卷 e14807页

作者： S Seralathan G Chenna Reddy S Sathish A Muthuram Joshuva Arockia Dhanraj Natrayan Lakshmaiya Karthikeyan Velmurugan Chatchai Sirisamphanwong Rattapon Ngoenmeesri Chattariya Sirisamphanwong School of Aeronautical Sciences Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Centre for Automation & Robotics (ANRO) Department of Mechatronics Engineering Hindustan Institute of Technology and Science Chennai 603103 Tamil Nadu India. Department of Mechanical Engineering Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences Chennai India. Center for Alternative Energy Research and Development Khon Kaen University Thailand. Mechanical Engineering Division Faculty of Engineering Khon Kaen University Khon Kaen Thailand. Smart Energy System Integration Research Unit Department of Physics Faculty of Science Naresuan University Thailand. Research and Academic Service Faculty of Science Naresuan University Thailand. Department of Physics and General Science Faculty of Science Nakhon Sawan Rajabhat University Thailand.

This study presents the details of performance and exergy investigations on an inclined solar still with baffle arrangements. The shortage of consumable water creates the transformation of accessible brackish water into consumable water an unavoidable one and this can be accomplished utilizing sun-oriented refining. To remove drinkable water from pungent water, sun-oriented still is broadly utilized. To build the contact season of the pungent water with sunlight-based brilliance, perplex course of action is set to expand the opposition in the stream. This prompts more vanishing of brackish water. Therefore, the objective of this study is to improve freshwater yield. The experimental study is performed for two different mass flow rates (m = 0.0833 kg/min and m = 0.166 kg/min). An increase in the mass flow of water directly deteriorates the yield of fresh water. Highest accumulated freshwater yield is achieved as 2.908 kg/m day during the month of May for m = 0.0833 kg/min. The accumulated freshwater yield improved by 4.23% in comparison with inclined solar still designs. Moreover, the yield is better by 3.49%-61.56% in comparison with various solar still designs. Using RSM, a polynomial statistical model is specified to estimate as well as maximize the freshwater yield of ISSB. The exergy analysis for m = 0.0833 kg/min shows a maximum hourly exergy efficiency of 6.82%.

关键词： Baffle arrangements Exergy efficiency Inclined solar still Performance yield

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