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13th International Multi-Conference on Complexity, Informatics and Cybernetics, IMCIC 2022

作者： Yonezawa, Hiroki Hashimoto, Shigehiro Ono, Ryuya Biomedical Engineering Systems Design Kogakuin University Tokyo163-8677 Japan Biomedical Engineering Department of Mechanical Engineering Kogakuin University Tokyo163-8677 Japan

ISBN: (纸本)9781950492619

The effect of the wall shear stress gradient on deformation and rotation of each cell has been investigated in vitro. To make a Couette type of shear flow, the culture medium fluid was sandwiched with a constant gap between parallel walls: a lower stationary culture disk, and an upper rotating disk. 3T3-L1 (mouse fat precursor cells) was used in the test. After cultivation without flow for 24 hours for adhesion of cells on the lower plate, the shear stress lower than 2 Pa was continuously applied on cells for 24 hours in the incubator. The behavior (deformation and major axis angle) of each single cell was tracked at the time lapse images observed by an inverted phase contrast microscope placed in an incubator. Under wall shear stresses of lower than 1.9 Pa, each cell exhibits active behavior: migration, deformation, and rotation. Many cells transform into spheres at the wall shear stress higher than 1.9 Pa. Many cells tilt against a wall shear stress gradient around 50 Pa/m. © by the International Institute of Informatics and Systemics.

关键词： Shear stress

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optimization of Configuration Hybrid Power Generation System at Oil Refinery 4

optimization of Configuration Hybrid Power Generation System...

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4th International Conference on High Voltage engineering and Power Systems, ICHVEPS 2023

作者： Syafputra, Muhamad Apriyudi Waluyo, Joko Imawan, Roni Universitas Gadjah Mada Magister Program in System Engineering Yogyakarta Indonesia Universitas Gadjah Mada Department of Mechanical and Industrial Engineering Yogyakarta Indonesia Universitas Gadjah Mada Department of Electrical Engineering Yogyakarta Indonesia

ISBN: (纸本)9798350318678

The oil refinery industry has a potential emission reduction by combining its fossil fuel with Renewable Energy usage. One alternative to reduce carbon emissions is the hybrid power system using solar panels for electricity generation. This research will observe the optimum scenario for utilizing a hybrid power system. The research subject is observed refinery facilities that will be built in Indonesia, where the electricity source used formerly comes from fossils. The monitored parameters are Cost of Energy (COE) and carbon emission. optimization involves three scenarios involving basic and hybrid configurations. The basic scenario is the initial configuration of the electricity supply with power source from the generator and PLN (national's utility). The first scenario is a hybrid power plant utilizing the roofs of existing buildings in the refinery area. The second is a hybrid power plant with a battery to supply electricity at night, at the capacity of renewable energy (RE) of 20% and 40%. Compared to the basic scenario, scenario 1 increases COE by 0.17% and reduces carbon emission at 0.3% compared to the basic scenario. Scenario 2 with 20% and 40% of renewable energy are obtained at COE of 4.7% and 44.3%, while reducing emissions occurred at 38% and 52.7%, respectively. The scenario of a hybrid power system with a 20% renewable energy is the optimal result compared to the other scenarios. © 2023 IEEE.

关键词： Renewable energy resources

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Direction of Cell Deformation during Microgap Passage 13

Direction of Cell Deformation during Microgap Passage

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13th International Multi-Conference on Complexity, Informatics and Cybernetics, IMCIC 2022

作者： Hashimoto, Shigehiro Shimada, Sakyo Uehara, Shogo Biomedical Engineering Department of Mechanical Engineering Kogakuin University Tokyo163-8677 Japan Biomedical Engineering Systems Design Kogakuin University Tokyo163-8677 Japan

ISBN: (纸本)9781950492619

A biological cell can pass through a narrow gap. The gap plays a role of filter of cells in vivo. In the preset study, deformation of a cell during passing through a micro-gap in a micro flow channel has been analyzed in vitro. A gap with the rectangular cross section (7 μm high, 0.4 mm wide, and 0.1 mm long) has been made at the middle part of the micro flow channel by the photolithography technique. Myoblasts (C2C12: mouse myoblast cells) were used in the test. The flow rate of the medium fluid, in which cells were suspended, was controlled by the pressure head between the inlet and the outlet. The deformation of each cell passing through the micro gap was observed with an inverted phase-contrast microscope. The experimental results show that the cell tends to extend in the direction of flow with the increase of the velocity during the movement of passing through the gap. © by the International Institute of Informatics and Systemics.

关键词： Deformation

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Advancements in Geopolymer Concrete for Marine Infrastructure: An Optimization of Performance Considering Workability, Compressive Strength, Capillary Water Absorption, Porosity, and Chloride Migration

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Iranian Journal of Science and Technology - Transactions of Civil engineering 2024年 1-14页

作者： Shahedan, Noor Fifinatasha Hadibarata, Tony Jusoh, Muhammad Noor Hazwan Isia, Ismallianto Bouaissi, Aissa Juwono, Filbert Hilman Nawawi, Natasha Ahmad Kusumaningrum, Hermin Pancasakti Muslim, Abrar Hidayat, Topik Environment Engineering Program Curtin University Malaysia Miri CDT 250 Malaysia School of Engineering University of Plymouth Plymouth PL4 8AA United Kingdom Department of Electrical and Electronic Engineering Xi’an Jiaotong – Liverpool University Suzhou China School of Mechanical Engineering College of Engineering Universiti Teknologi MARA Shah Alam 40450 Malaysia Biotechnology Study Program Department of Biology Faculty of Science and Mathematics Universitas Diponegoro Semarang Indonesia Department of Chemical Engineering Faculty of Engineering Universitas Syiah Kuala Banda Aceh Indonesia Biology Study Program Faculty of Mathematics and Science Education Universitas Pendidikan Indonesia Bandung Indonesia

This research investigates the effectiveness of geopolymer concrete incorporating fly ash in environments rich in chlorides;in contrast to conventional Portland cement concrete (OPC). The study emphasizes essential characteristics such as workability, mechanical strength, capillary water absorption, open porosity, and chloride migration. The experiments demonstrated that geopolymer concrete exhibits a 30% enhancement in slump values, reflecting improved workability, and its compressive strength rose by 14.90–23.94% when compared with OPC. A significant reduction in binder content led to a notable decrease in capillary water absorption, highlighting a positive impact on long-term durability. With time, geopolymer concrete showed a reduction in open porosity and chloride migration coefficient, indicating better resistance to chloride penetration in marine settings. Although these outcomes underscore the potential of geopolymer concrete to improve structural durability, especially in marine infrastructure, additional optimization is required to tackle its relatively higher capillary water absorption and chloride migration during the initial stages. These results contribute to the ongoing investigation of sustainable building materials, offering valuable insights into geopolymer concrete’s ability to endure severe chloride exposure and serve as a durable solution for corrosion management in marine infrastructure. © The Author(s), under exclusive licence to Shiraz University 2024.

关键词： Durability Geopolymer concrete Marine environments Mix design Sustainable construction

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Modulation and Time-History-Dependent Adaptation Improves the Pick-and-Place Control of a Bioinspired Soft Grasper 13th

Modulation and Time-History-Dependent Adaptation Improves th...

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13th International Conference on Biomimetic and Biohybrid Systems, Living Machines 2024

作者： Li, Yanjun Sukhnandan, Ravesh Chiel, Hillel J. Webster-Wood, Victoria A. Quinn, Roger D. Department of Mechanical Engineering Case Western Reserve University ClevelandOH United States Department of Biology Case Western Reserve University ClevelandOH United States Department of Neurosciences Case Western Reserve University ClevelandOH United States Department of Biomedical Engineering Case Western Reserve University ClevelandOH United States Department of Mechanical Engineering Carnegie Mellon University PittsburghPA United States Department of Biomedical Engineering Carnegie Mellon University PittsburghPA United States McGowan Institute for Regenerative Medicine Carnegie Mellon University PittsburghPA United States

ISBN: (纸本)9783031725968

It is widely believed that adaptive peripheral neural control circuits and compliant peripheral biomechanics in biological systems are critical for their control of interactions with the environment. Inspired by the sea slug Aplysia californica’s adaptive feeding mechanism, we previously designed a pneumatically actuated soft grasper controlled by Synthetic Nervous Systems for pick and place manipulation. To guarantee the grasping success rate, the controller sends a fixed grasper radius command during grasper closure. However, such a strategy may generate overly high contact force for manipulating soft and fragile objects. To address this problem, we adopted velocity control circuitry to cap the contact force within a force threshold. Furthermore, inspired by the local modulation of Aplysia networks and muscles, we incorporated time-history-dependent control into the grasper controller. Such modulatory mechanisms allow the force threshold to adapt according to the external load. We evaluated the adaptive controller’s performance in simulation and physical hardware. By comparing it with two baselines, we show the grasper can achieve high success rates for pick-and-place tasks and prevent high contact force when manipulating light objects in a simulation environment. Hardware experiments were also performed to demonstrate that the control network could be transferred to the real-world platform. These results support our hypothesis that soft, morphologically intelligent grasping robots with onboard bioinspired adaptation will improve grasping performance. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2025.

关键词： Adaptive control systems

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Soft wearable flexible bioelectronics integrated with an anklefoot exoskeleton for estimation of metabolic costs and physical effort

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npj Flexible Electronics 2023年第1期7卷 535-544页

作者： Jihoon Kim Prakyath Kantharaju Hoon Yi Michael Jacobson Hyungkeun Jeong Hojoong Kim Jinwoo Lee Jared Matthews Nathan Zavanelli Hyeonseok Kim Heejin Jeong Myunghee Kim Woon-Hong Yeo IEN Center for Human-Centric Interfaces and Engineering and George W.Woodruff School of Mechanical Engineering Georgia Institute of TechnologyAtlantaGA 30332USA Department of Mechanical and Industrial Engineering the University of Illinois at ChicagoChicagoIL 60607USA Department of Mechanical Roboticsand Energy EngineeringDongguk UniversitySeoulRepublic of Korea Human Systems Engineering The Polytechnic SchoolIra A.Fulton Schools of EngineeringArizona State UniversityMesaAZ 85212USA Wallace H.Coulter Department of Biomedical Engineering Georgia Institute of Technology and Emory University School of MedicineAtlantaGA 30332USA Institute for Robotics and Intelligent Machines Parker H.Petit Institute for Bioengineering and BiosciencesInstitute for MaterialsNeural Engineering CenterGeorgia Institute of TechnologyAtlantaGA 30332USA

Activities and physical effort have been commonly estimated using a metabolic rate through indirect calorimetry to capture breath *** physical effort represents the work hardness used to optimize wearable robotic ***,personalization and rapid optimization of the effort are *** respirometry is the gold standard for estimating metabolic costs,this method requires a heavy,bulky,and rigid system,limiting the system’s field ***,this paper reports a soft,flexible bioelectronic system that integrates a wearable ankle-foot exoskeleton,used to estimate metabolic costs and physical effort,demonstrating the potential for real-time wearable robot adjustments based on *** from a set of activities,including walking,running,and squatting with the biopatch and exoskeleton,determines the relationship between metabolic costs and heart rate variability root mean square of successive differences(HRV-RMSSD)(R=−0.758).Collectively,the exoskeleton-integrated wearable system shows potential to develop a field-deployable exoskeleton platform that can measure wireless real-time physiological signals.

关键词： skeleton wear estimation

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Preparation and Optical Performance of Polyimide Thin Films with Micro Prism

Preparation and Optical Performance of Polyimide Thin Films ...

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2024 IEEE International Conference on Manipulation, Manufacturing and Measurement on the Nanoscale, 3M-NANO 2024

作者： Hu, Junting Weng, Zhankun Fayomi, Ojo S. Cui, Yuxiao Wang, Shenzhi Liu, Tong Wang, Guanqun Changchun University of Science and Technology International Research Centre for Nano Handing and Manufacturing of China Changchun China Foshan University International Research Centre for Nano Handing and Manufacturing of China School of Mechanical and Electrical Engineering and Automation Foshan China Bells University of Technology College of Engineering Department of Mechanical and Biomedical Engineering Nigeria

ISBN: (纸本)9798350362107

In response to the problem of high indoor temperature caused by direct sunlight, this work prepared polyimide films with micro prism structures. Compared to unstructured PI films, the PI micro prism film exhibits excellent reflection efficiency in the visible light region (400 nm-800 nm), with the highest reflectivity reaching 38.25% at a period of 13 pm. In addition, in the infrared band (8-14 μ m), both PI microprisms and PI films exhibit good radiative cooling performance. PI micro prism thin film has good potential in reducing room temperature when applied to indoor glass surfaces. © 2024 IEEE.

关键词： Prisms

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Optimized photonic integrated circuit components for optical coherence tomography at 1060 nm

Optimized photonic integrated circuit components for optical...

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CLEO: Applications and Technology in CLEO 2024, CLEO: A and T 2024 - Part of Conference on Lasers and Electro-Optics

作者： Hao, Senyue Adkins, Aaron J. Zhang, Yitian Zhou, Chao Department of Electrical & Systems Engineering Washington University Saint Louis United States Imaging Science PhD Program Washington University Saint Louis United States Department of Biomedical Engineering Washington University Saint Louis United States

To implement optical coherence tomography on photonic chips, we developed optimized and experimentally validated silicon nitride-based components for photonic integrated circuits in order to achieve high sensitivity a... 详细信息

关键词： Photonic integrated circuits

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Tracking Markers on Scaffold Associated with Movement of Cultured Myotubes 26

Tracking Markers on Scaffold Associated with Movement of Cul...

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26th World Multi-Conference on Systemics, Cybernetics and Informatics, WMSCI 2022

作者： Endo, Yoshiaki Hashimoto, Shigehiro Sakai, Shusei Shimayama, Tomoki Biomedical Engineering Systems Design Kogakuin University Tokyo163-8677 Japan Biomedical Engineering Department of Mechanical Engineering Kogakuin University Tokyo163-8677 Japan

ISBN: (纸本)9781950492657

The movement of micro matrix pattern markers on the rear side of the scaffold thin film has been tracked associated with the movement of the layer of myotubes under the cyclic electric pulse stimulation in vitro. The scaffold was made of a thin polydimethylsiloxane film (thickness of 6 µm), of which the back side had arrangement of micro-protrusions (4 µm diameter, 2 µm height, interval 30 µm) made by the photolithography technique. Mouse myoblasts (C2C12) were cultured to be differentiated into myotubes on the scaffold for 10 days. Markers on the film could be observed under a microscope, although the contrast of markers was not sufficient to be automatically distinguished from the pattern of myotubes. The experimental results show that the local cyclic movement of the markers was able to be measured. The designed scaffold has a potential to analyze the local contractile movement of the layer of myotubes in vitro. The technology can be applied to functional evaluation of engineered tissue. Copyright 2022 © by the International Institute of Informatics and Systemics. All rights reserved.

关键词： Cell culture

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Effect of Weld Currents on Microstructure, Corrosion Behavior of AZ31 Magnesium Alloy

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Journal of Bio- and Tribo-Corrosion 2021年第2期7卷 1-8页

作者： Demir, Bilge Koç, Erkan Saud, Amir N. Department of Mechanical Engineering Karabuk University Karabuk Turkey Department of Biomedical Engineering Karabuk University Karabuk Turkey Department of Biomedical Engineering Al-Mustaqbal University College Babylon Iraq

Resistance spot welding (RSW) of magnesium alloys is very attractive due to not require filler metal. AZ31 Mg alloy sheets were exposed to RSW by constant weld electrode pressure, constant weld times, and numerous weld currents. The potentiodynamic polarization technique was used for the investigation of the corrosion behavior of the alloys. Results showed that the dendritic structure was promoted at the weld zone. AZ31 base metal is more resistant to corrosion than welded alloys. However, when compared with each other, icorr values of the welded alloys decrease as a function of weld current increases. The corrosion rate was predominantly influenced by the distribution of intermetallic and alloying elements, and RSW weld varied, which was in response to altering the joint microstructure. © 2021, The Author(s), under exclusive licence to Springer Nature Switzerland AG part of Springer Nature.

关键词： Microstructure

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