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Thin coatings for pumping station mechanical components

IOP Conference Series: Materials Science and engineering 2019年第1期591卷

作者： C Cirlan Paleu V Paleu B Istrate N Cimpoesu C Munteanu 'Gheorghe Asachi' Technical University of Iasi Mechanical Engineering Faculty Mechanical Engineering Mechatronics and Robotics Department 63 D. Mangeron Blvd. 700050 Iasi Romania 'Gheorghe Asachi' Technical University of Iasi Faculty of Material Science and Engineering Dept. of Materials Science 67 D. Mangeron Blvd. 700050 Iasi Romania

The pumping stations are key points of water treatment plants, their performance directly affecting the serviceability of the entire water treatment system. The excessive wear of mechanical components conducts to pumping station out of service state. The deposition of thin coatings on the elements subjected to wear can generally extend the operating time of the water treatment plants. The paper analyses the failure modes of the mechanical components of the pumping stations and the existing efficient solutions for thin coating deposition to protect them from excessive wear. Consequently, an effective coating is deposited on the raw metal by Atmospheric Plasma Spraying (APS) and tribological tests are developed for an initial assessment of the anti-wear properties of the coating. The worn contact surfaces are analysed by Scanning Electron Microscopy (SEM) and the chemical composition is established by Energy-dispersive X-ray spectroscopy (EDS). The tests are still in development, revealing that the main failure modes of the coating are abrasive wear and delamination. Future research will be conducted to identify the best combination of powders for a multiple layer deposited coating with high wear resistance.

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Numerical simulations for impact damage detection in composites using vibrothermography

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IOP Conference Series: Materials Science and engineering 2010年第1期10卷

作者： L J Pieczonka W J Staszewski F Aymerich T Uhl M Szwedo AGH University of Science and Technology Department of Robotics and Mechatronics Al. Mickiewicza 30 30-059 Krakow Poland Sheffield University Department of Mechanical Engineering Mappin Street Sheffield S1 3JD UK University of Cagliari Department of Mechanical Engineering 09123 Piazza d'Armi Cagliari Italy

Composite materials are widely used in many engineering applications due to their high strength-to-weight ratios. However, it is well known that composites are susceptible to impact damage. Detection of impact damage is an important issue in maintenance of composite structures. Various non-destructive image-based techniques have been developed for damage detection in composite materials. These include vibrothermography that detects surface temperature changes due to heating associated with frictional energy dissipation by damage. In the present paper numerical simulations are used to investigate heat generation in a composite plate with impact damage in order to support damage detection analysis with vibrothermography. Explicit finite elements are used to model ultrasonic wave propagation in the damaged plate. Simulated delamination and cracks induce frictional heating in the plate. Coupled thermo-mechanical simulations are performed in high frequencies using commercial LS-Dyna finite element code. Very good qualitative agreement between measurements and simulations has been obtained. The area of increased temperature corresponds very well with the damaged area in both experiments and simulations. Numerical model has to be further refined in order to quantitatively match the experiments. The main issues of concern are frictional and thermal properties of composites. The final goal of these research efforts is to predict damage detection sensitivity of vibrothermography in real engineering applications based on numerical models.

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Recent trends on organizational energy reduction policies and best practices in South-East Asia

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Materials Today: Proceedings 2023年 81卷 302-309页

作者： Sami Salama Hussen Hajjaj Mohamed Thariq Hameed Sultan Daryl Ian Paliath Lee Seng Hua Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

Reports show that 40% of global carbon emissions come from energy consumed in buildings, so organizations around the world continuously seek ways to reduce their buildings energy consumption. Research identifies three main approaches; Retrofitting, the use of Low Carbon Buildings (LCB), and implementing Energy Management Systems (EMS). However, other factors could affect the success of these approaches; climate and local weather, building types, social acceptance, and implementation. This paper reviews and evaluates 50 reports on these implementations, and uses that evaluation to identify the most effective approach to reduce buildings carbon footprint. In this evaluation, authors used the reported success rate (in reducing carbon footprint) as key parameter, they then cross-checked this with origin of reports (country, climate region), building type, and implementation thoroughness. This allowed the authors to identify not only the best approach, but also understand the impact of these other factors on the reported success rate. Retrofitting was implemented the most (58%) but with varying success (2% to 49% reductions), this variation is attributed to the current state of the buildings and the level/method of retrofitting applied. LCB showed the highest reductions as energy saving measures were preplanned before building construction, this however limits LCB to new and planned buildings. Even though EMS showed results comparable to Retrofitting and required a fraction of the costs/effort, only 14% implemented it, this is an indication of the level of social awareness in the region on the need to reduce carbon footprint and its impact on the world’s climate.

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Numerical study on the movement of air inside the inner cavity of a hovercraft model

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IOP Conference Series: Materials Science and engineering 2018年第8期444卷

作者： M S Pavăl A Popescu T Popescu D Zahariea D E Husaru Mechanical Engineering and Road Automotive Engineering Department 'Gheorghe Asachi' Technical University of Iaşi Iaşi Romania Fluid Mechanics Fluid Machinery and Fluid Power Systems Department 'Gheorghe Asachi' Technical University of Iaşi Iaşi Romania Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania

This article describes several numerical simulations on aerodynamic characteristics of an oval shaped hovercraft. The 3D model was created in CATIA V5 and numerical analysis was performed in ANSYS Fluent. For numerical simulation, the velocity at inlet section and air-clearance height were specified as input parameters, with stationary hovercraft, flat ground surface and the flexible skirt that does not deform under the influence of the pressure created as imposed conditions. Three different air-clearance heights and velocities at inlet section are analysed. The output results of the numerical simulations are mass flow rate, lift force, static pressure, velocity distribution and pressure inside hovercraft.

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Hydraulic systems used for pitch control of wind turbines: a literature overview

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IOP Conference Series: Materials Science and engineering 2018年第4期444卷

作者： R I Pelin P D Bârsănescu I Tiţa 'Gheorghe Asachi' Technical University of Iasi Iasi Romania Mechanical Engineering Mechatronics and Robotics Department 'Gheorghe Asachi' Technical University of Iasi Iasi Romania Fluid Mechanics Fluid Machines and Fluid Power Systems Department 'Gheorghe Asachi' Technical University from Iasi Romania

This paper contains an analysis of some researches regarding hydraulic systems used for pitch control of wind turbines. As is already known pitch control is important for the aerodynamic efficiency of wind turbine influencing the energy capture, pitch angle being an important parameter by its influence on the angle of attack of the wind. This kind of control is also important in order to protect the turbine in the case of high values of the wind speed reducing the extreme loads. In many cases the system used to change pitch is a hydraulic system. Considering the tendencies in using hydraulic systems in wind turbines, some research directions resulted from reviewed scientific articles. In the case of high-power wind turbines, the load on the blade being important, the rotation of the blades around their own axes in order to change the pitch angle supposes great acting forces. Hydraulic systems provide them in reduce size equipment. The blade rotation may be controlled simultaneously, in the case of collective pitch control, or separately for each one of the blades, in the case of individual control of the blades.

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Online support for research activities by high school and junior high school students 38

Online support for research activities by high school and ju...

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38th International Cosmic Ray Conference, ICRC 2023

作者： Enomoto, H. Abe, H. Hoashi, R. Kimura, M. Kita, R. Kobayashi, N. Kono, R. Kumagai, K. Maruta, K. Nakagawa, R. Nose, C. Saito, R.J. Sasaki, M. Takanashi, M. Tanaka, K.S. Accel Kitchen LLC 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tokyo Institute of Technology Department of Earth and Planetary Science 2-12-1 Ookayama Meguro-ku Tokyo Japan Tohoku University Department of Mechanical and Aerospace Engineering 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Earth Science 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tokyo Denki University Department of Robotics and Mechatronics 5 Senju Asahi-cho Adachi-ku Tokyo Japan University of Tokyo Natural Sciences I 3-8-1 Komaba Meguro-ku Tokyo Japan Tohoku University Department of Quantum Science and Energy Engineering 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Chemistry 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Planetary Plasma and Atmospheric Research Center 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Physics 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Health Sciences 2-1 Seiryo-machi Aoba-ku Miyagi Sendai Japan 1-5-1 Chofugaoka Chofu Tokyo Japan Waseda University Faculty of Science and Engineering 3-4-1 Okubo Shinjuku-ku Tokyo Japan

Accel Kitchen LLC has launched Japan largest cosmic-ray outreach network providing handy cosmic-ray detectors to more than 100 high school and junior high school students and supporting their research activities remotely with online communication tools. There are over 30 various and unique research topics conducted by students e.g. measurement of the cosmic-ray flux at Japan’s highest mountain Mt. Fuji to investigate the relationship with altitude, comparison of cosmic-ray flux with sunspot counts observed by the school’s telescope, collaboration with students in Argentina to compare the cosmic-ray flux between Japan and Argentina to observe the effect of the South Atlantic Anomaly. Online research support by undergraduate and graduate students enables them to conduct scientific research and some of their progress has been published in peer-review *** this presentation, we will introduce their research activities. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Cosmic ray detectors

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Correction: Electrocoalescence of paired droplets encapsulated in double-emulsion drops

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Lab on a chip 2016年第22期16卷 4466页

作者： Yankai Jia Yukun Ren Weiyu Liu Likai Hou Ye Tao Qingming Hu Hongyuan Jiang School of Mechatronics Engineering Harbin Institute of Technology West Da-zhi Street 92 Harbin Heilongjiang 150001 PR China. rykhit@***. School of Mechatronics Engineering Harbin Institute of Technology West Da-zhi Street 92 Harbin Heilongjiang 150001 PR China. rykhit@*** and State Key Laboratory of Robotics and System Harbin Institute of Technology West Da-zhi Street 92 Harbin Heilongjiang 150001 PR China. jhy_hit@***.

Correction for 'Electrocoalescence of paired droplets encapsulated in double-emulsion drops' by Yankan Jia et al., Lab Chip, 2016, DOI: .

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Radiation detectors fabricated by secondary students 38

Radiation detectors fabricated by secondary students

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38th International Cosmic Ray Conference, ICRC 2023

作者： Tanaka, K.S. Abe, H. Enomoto, H. Hoashi, R. Kimura, M. Kita, R. Kobayashi, N. Kono, R. Kumagai, K. Maruta, K. Nakagawa, R. Nose, C. Saito, R.J. Sasaki, M. Takanashi, M. Accel Kitchen LLC 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Waseda University Faculty of Science and Engineering 3-4-1 Okubo Shinjuku-ku Tokyo Japan Tohoku University Department of Mechanical and Aerospace Engineering 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tokyo Institute of Technology Department of Earth and Planetary Science 2-12-1 Ookayama Meguro-ku Tokyo Japan Tohoku University Department of Physics 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tokyo Denki University Department of Robotics and Mechatronics 5 Senju Asahi-cho Adachi-ku Tokyo Japan University of Tokyo Natural Sciences I 3-8-1 Komaba Meguro-ku Tokyo Japan Tohoku University Department of Quantum Science and Energy Engineering 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Chemistry 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Earth Sciences 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Planetary Plasma and Atmospheric Research Center 6-3 Aramaki Aza-Aoba Aoba-ku Sendai Japan Tohoku University Department of Health Sciences 2-1 Seiryo-machi Aoba-ku Miyagi Sendai Japan 1-5-1 Chofugaoka Chofu Tokyo Japan

Accel Kitchen LLC offers online support to over 150 high school and junior high school students in their personal radiation research. Many of these students have fabricated original detectors, such as a depth of interaction (DOI) detector comprising multiple scintillator layers for particle identification and positional sensitivity measurement, a Cherenkov detector made from an acrylic block and Silicon photomultiplier, and a time-of-flight detector capable of sub-nanosecond resolution using a Red Pitaya ADC board. Thus, students not only conduct their measurements with given detectors but also assemble and modify them for their own research purposes. © Copyright owned by the author(s) under the terms of the Creative Commons.

关键词： Silicon detectors

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Autonomous fertilizer mixer through the Internet of Things (IoT)

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Materials Today: Proceedings 2023年 81卷 295-301页

作者： Abdul Hadi Ishak Sami Salama Hussen Hajjaj Kisheen Rao Gsangaya Mohamed Thariq Hameed Sultan Mohd Fazly Mail Lee Seng Hua Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Farm Mechanization Program Engineering Research Centre Malaysian Agricultural Research and Development Institute (MARDI) 43400 Serdang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

Organic fertilizers have been used since the dawn of mankind to improve soil fertility and promote crop growth. However, the process of preparing organic fertilizers for use in agricultural activities is a labour-intensive and time-consuming procedure. Thus, in order to reduce labour costs and improve the efficiency of organic fertilizer preparation, automated organic fertilizer mixers were developed. For this research work, an improved organic fertilizer mixer based on the Internet of Things (IoT) technology capable of monitoring the status of fertilizer production remotely and providing updates and alerts to workers was developed. The aim of this work was to further reduce labour workload and costs, thus increasing efficiency of the organic fertilizer mixing process. In order to accommodate the IoT monitoring system, several modifications and design changes were carried out on the prototype of an automated organic fertilizer mixer. Tests conducted on the prototype unit showed that it performs as required. The IoT monitoring system successfully captures and uploads information on the weight of agricultural waste mixture in the storage drum to the IoT platform. This information can then be used to alert workers on when to add more agricultural waste material to the mixture or remove the processed organic fertilizer. Furthermore, an overall operational cost comparison of different organic fertilizer production methods showed that the automated organic fertilizer prototype provides operational cost savings of over 5 times when compared to current automated systems. Future work includes further automation to the agricultural waste filling and organic fertilizer removal process.

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Design and development of a robot for spraying fertilizers and pesticides for agriculture

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Materials Today: Proceedings 2023年 81卷 242-248页

作者： Afif Shazwan Abdul Ghafar Sami Salama Hussen Hajjaj Kisheen Rao Gsangaya Mohamed Thariq Hameed Sultan Mohd Fazly Mail Lee Seng Hua Department of Mechanical Engineering Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Centre for Advanced Mechatronics and Robotics (CaMaRo) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Institute of Informatics and Computing in Energy (IICE) Universiti Tenaga Nasional Jalan IKRAM-UNITEN 43000 Kajang Selangor Darul Ehsan Malaysia Laboratory of Biocomposite Technology Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Department of Aerospace Engineering Faculty of Engineering Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia Aerospace Malaysia Innovation Centre (944741-A) Prime Minister’s Department MIGHT Partnership Hub Jalan Impact 63000 Cyberjaya Selangor Darul Ehsan Malaysia Farm Mechanization Program Engineering Research Centre Malaysian Agricultural Research and Development Institute (MARDI) 43400 Serdang Selangor Darul Ehsan Malaysia Laboratory of Biopolymer and Derivatives Institute of Tropical Forestry and Forest Products (INTROP) Universiti Putra Malaysia 43400 UPM Serdang Selangor Darul Ehsan Malaysia

The agriculture industry is one that is highly resource- and labour-intensive. As such, farmers are increasingly turning to technology and automation to address this issue. However, agricultural robots are far too complicated, slow, and costly to be made publicly available. As a result, the agriculture sector still lags behind in integrating modern technologies. This research paper details the development of a low-cost agricultural robot for spraying fertilizers and pesticides in agriculture fields as well as for general crop monitoring. The prototype system is a two-wheeled robot that consists of a mobile base, a spraying mechanism, a wireless controller for controlling the robot movement, and a camera for crop health and growth monitoring as well as detecting the presence of pests in the agriculture field. Tests conducted on the prototype system show that while the productivity of the robot in terms of crop coverage is slightly lower than a human worker, the labour cost savings afforded by the agricultural robot prototype is much greater as it functions completely in an autonomous mode and only requires the operator to control the robot when placing it at the start of the crop path. Furthermore, the prototype system also provides greater resource savings and reduction in the contamination of underground water sources due to leeching process, thus achieving precision agriculture goals. Lastly, the excellent battery life of the prototype system ensures that there will be no increase in the operation times and reduction in the efficiency of the fertilizer and pesticide spraying process due to the recharging times when replacing human workers. Future recommendations include making the agricultural robot fully autonomous, using either a rail- or line-following system, to further reduce the labour requirements and costs.

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