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IEEE International Symposium on Intelligent Signal Processing and Communication systems (ISPACS)

作者： Nagisa Ishizumi Manabu Gouko Graduate School of Engineering Master's program in Mechanical Engineering Tohoku Gakuin University Miyagi Prefecture Japan

In Japan, as the rate of dementia increases, the interest in preventing dementia also increases. In this paper, we propose a flowerpot-type robot system called Famileaf. Growing a plant using Famileaf is expected to prevent dementia. The robot comprises a flowerpot, microcomputer, multiple sensors, and a battery. Famileaf can post a comment on a social networking site (SNS) to interact with an elderly person who is a grower. The users of the robot can grow plants in the same manner as they take care of a pet. Because the users can grow plants with more attachment, the use of Famileaf is expected to prevent dementia. Herein, the concept and the prototype of Famileaf have been described.

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Linking physical phenotype to drug resistance: Single-cell mechanical measurements of acute promyelocytic Leukemia 23

Linking physical phenotype to drug resistance: Single-cell m...

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23rd International Conference on Miniaturized systems for Chemistry and Life Sciences, MicroTAS 2019

作者： Li, Brian L. Maslan, Annie M. Streets, Aaron M. Sohn, Lydia L. UC Berkeley UCSF Graduate Program in Bioengineering Berkeley and San Francisco United States UC Berkeley Center for Computational Biology Berkeley United States UC Berkeley Biophysics Graduate Group Berkeley United States UC Berkeley Department of Mechanical Engineering Berkeley United States

ISBN: (纸本)9781733419000

mechanical testing of cancer cells has established that certain pathophysiological phenotypes are strongly associated with abnormal cell mechanics. We used a microfluidic platform previously developed in our laboratory to perform rapid mechanical phenotyping of acute promyelocytic leukemia (APL) cells. These measurements revealed that drug-resistant APL cells exhibit more solid-like viscoelastic behavior compared to drug-responsive cells and that this mechanical difference could be due to chromatin condensation. Our work demonstrates that single-cell mechanical phenotyping could serve to predict drug-resistance in APL. © 2019 CBMS-0001.

关键词： mechanical testing

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Non-hermitian fabry-perot resonances in a PT-symmetric system

arXiv

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arXiv 2020年

作者： Shobe, Ken Kuramoto, Keiichi Imura, Ken-Ichiro Hatano, Naomichi Department of Semiconductor Electronics and Integration Science AdSM Hiroshima University 739-8530 Japan Program of Electronic Devices and Systems School of Engineering Hiroshima University 739-8527 Japan Graduate School of Advanced Science and Engineering Hiroshima University 739-8530 Japan Institute of Industrial Science The University of Tokyo 277-8574 Japan

In non-Hermitian scattering problems the behavior of the transmission probability is very different from its Hermitian counterpart;it can exceed unity or even be divergent, since the non-Hermiticity can add or remove the probability to and from the scattering system. In the present paper, we consider the scattering problem of a PT-symmetric potential and find a counter-intuitive behavior. In the usual PT-symmetric non-Hermitian system, we would typically find stationary semi-Hermitian dynamics in a regime of weak non-Hermiticity but observe instability once the non-Hermiticity goes beyond an exceptional point. Here, in contrast, the behavior of the transmission probability is strongly non-Hermitian in the regime of weak non-Hermiticity with divergent peaks, while it is superficially Hermitian in the regime of strong non-Hermiticity, recovering the conventional Fabry-Perot-type peak structure. We show that the unitarity of the S-matrix is generally broken in both of the regimes, but is recovered in the limit of infinitely strong non-Hermiticity. Copyright © 2020, The Authors. All rights reserved.

关键词： Transmissions

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Non-linear optics at twist interfaces in h-BN/SiC heterostructures

arXiv

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arXiv 2023年

作者： Biswas, Abhijit Xu, Rui Alvarez, Gustavo A. Zhang, Jin Christiansen-Salameh, Joyce Puthirath, Anand B. Burns, Kory Hachtel, Jordan A. Li, Tao Iyengar, Sathvik Ajay Gray, Tia Li, Chenxi Zhang, Xiang Kannan, Harikishan Elkins, Jacob Pieshkov, Tymofii S. Vajtai, Robert Birdwell, A. Glen Neupane, Mahesh R. Garratt, Elias J. Ivanov, Tony Pate, Bradford B. Zhao, Yuji Zhu, Hanyu Tian, Zhiting Rubio, Angel Ajayan, Pulickel M. Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States Sibley School of Mechanical and Aerospace Engineering Cornell University IthacaNY14853 United States Max Planck Institute for the Structure and Dynamics of Matter Center for Free-Electron Laser Science Luruper Chaussee 149 22761 Germany Department of Materials Science & Engineering University of Virginia CharlottesvilleVA22904 United States Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States DEVCOM Army Research Laboratory RF Devices and Circuits AdelphiMD20783 United States Chemistry Division Naval Research Laboratory WashingtonDC20375 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Flatiron Institute New YorkNY10010 United States

Understanding the emergent electronic structure in twisted atomically thin layers has led to the exciting field of twistronics. However, practical applications of such systems are challenging since the specific angular correlations between the layers must be precisely controlled and the layers have to be single crystalline with uniform atomic ordering. Here, we suggest an alternative, simple and scalable approach where nanocrystalline two-dimensional (2D) film on three-dimensional (3D) substrates yield twisted-interface-dependent properties. Ultrawidebandgap hexagonal boron nitride (h-BN) thin films are directly grown on high in-plane lattice mismatched wide-bandgap silicon carbide (4H-SiC) substrates to explore the twist-dependent structure-property correlations. Concurrently, nanocrystalline h-BN thin film shows strong nonlinear second-harmonic generation and ultra-low cross-plane thermal conductivity at room temperature, which are attributed to the twisted domain edges between van der Waals stacked nanocrystals with random in-plane orientations. First-principles calculations based on time-dependent density functional theory manifest strong even-order optical nonlinearity in twisted h-BN layers. Our work unveils that directly deposited 2D nanocrystalline thin film on 3D substrates could provide easily accessible twist-interfaces, therefore enabling a simple and scalable approach to utilize the 2D-twistronics integrated in 3D material devices for next-generation nanotechnology. © 2023, CC BY.

关键词： Harmonic generation

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The influence of industrial work practices and workshop infrastructure facilities on work readiness of students

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Journal of Physics: Conference Series 2021年第1期1833卷

作者： M R A Setyadi M B Triyono R W Daryono Graduate Program of Technological and Vocational Education Universitas Negeri Yogyakarta Yogyakarta Indonesia Department of Mechanical Engineering Education Faculty of Engineering Universitas Negeri Yogyakarta Yogyakarta Indonesia

This study aims to determine the influence of industrial work practice and workshop facilities on work readiness in class XI mechanical engineering. The research subjects were 101 students of class XI mechanical engineering, using the ex post facto research method using statistical analysis using the SPSS program. The results of the study are as follows: (1) industrial work practices have a positive effect on job readiness with a significance of 0.000, a determination coefficient of 30% has an effect; (2) Workshop infrastructure has a positive influence on work readiness with a significance value of 0.000, 28.6% determination efficiency has an effect; (3) industrial work practices and infrastructure together have an influence on job readiness indicated by a significance value of 0.000 having a coefficient of determination 58,6% in influencing job readiness.

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Structural health monitoring: Frequency domain analysis of beam with breathing crack

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IOP Conference Series: Earth and Environmental Science 2021年第1期729卷

作者： F E Gunawan Y Kanto I Kamil Sutikno H N Tran Industrial Engineering Department BINUS Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta Indonesia 11480 Mechanical Systems Engineering College of Engineering Ibaraki University Ibaraki Japan Department of Industrial Engineering Department Faculty of Engineering Andalas University Padang Indonesia Department of Mechanical Engineering Department Faculty of Engineering Institut Teknologi Sepuluh Nopember Surabaya Indonesia Department of Automotive Engineering Faculty of Transportation Engineering Ho Chi Minh City University of Technology Ho Chi Minh City Viet Nam

Structural Health Monitoring (SHM) system can be considered as an Internet-of-Things (IoT) system implemented to engineering structure to provide real-time information on the integrity of the structure. In doing so, the system acquires data from various sensors distributed across the structure and infers damage sensitive quantities. In the research, we proposed a damage index derived from the governing dynamics of the structure in the frequency domain. The proposal was empirically verified by applying the index to analyze the case of a cracked cantilever beam subjected to a harmonic load. The value of the damage index was computed at some points surrounding the crack to understand the effect of the distance of the monitoring point to the crack to the index sensitivity. The results suggest that the index is sensitive to the crack particularly when the observation point is near the crack.

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Improvement of the ungrounded force display using grooved cam 17

Improvement of the ungrounded force display using grooved ca...

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17th IEEE International Conference on industrial Informatics, INDIN 2019

作者： Kakuda, Emi Yokota, Sho Matsumoto, Akihiro Chugo, Daisuke Hashimoto, Hiroshi Toro University Graduate School of Science and Eng Kawagoe Japan Toyo University Dept. of Mechanical Engineering Kawagoe Japan Kwansei Gakuin University School of Science and Technology Hyogo Japan Advanced Institute of Industrial Technology Master Program of Innovation for Design and Eng. Tokyo Japan

ISBN: (纸本)9781728129273

This paper proposes the ungrounded force display using the grooved cam. Using the human illusion, the user can feel the force in the one direction when they use proposed device. It is mainly configured the cam and the slider. The slider follows the cam and moves translational movement. In this paper, we create the new prototype which solving the problems that emerged from the previous prototype. We evaluate the device using the two experiments. One is the subjective evaluation. Second one is the force presentation from the new prototype as the quantitative evaluation. We could solve problems of previous prototype by changing the cam type from plate to groove and blushless motor, and the new one produce the force more clearly than the previous prototype. © 2019 IEEE.

关键词： Navigation systems

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Ranking factors affecting public transport mode choice of commuters in an urban city of a developing country using analytic hierarchy process: The case of Metro Cebu, Philippines (vol 4, 100078, 2020)

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TRANSPORTATION RESEARCH INTERDISCIPLINARY PERSPECTIVES 2020年 4卷

作者： Mayo, F. L. Engineering Graduate Program School of Engineering University of San Carlos Talamban Cebu City 6000 Philippines Department of Industrial Engineering School of Engineering University of San Carlos Talamban Cebu City 6000 Philippines Department of Chemical Engineering School of Engineering University of San Carlos Talamban Cebu City 6000 Philippines

Understanding the factors that impact commuter's transport mode choice is one of the important key aspects to consider when aiming for a sustainable transportation system, especially in developing countries where this is still a relatively new concept. This study aims to examine and rank the factors that commuters in selected urban cities in the Philippines perceive to significantly affect their transport mode choice. Data collected from three urban cities in Metro Cebu are used to determine which factors and transport mode choice are prioritized based on demographic and socioeconomic segments as well as reasons for travelling. Factors and modes of transportation are ranked using analytic hierarchy process. Key findings show that regardless of age, gender, income and intent of travel, safety is ranked first over accessibility, cost of travel, comfort and concern for environment. Despite the worsening traffic conditions and increasing cost of travel, private and semi-private for-hire vehicles are highly ranked over various mass transport systems when all factors are simultaneously considered. It is noteworthy to see how factors are ranked 2nd after safety by each group. The results can be used by policymakers to evaluate and develop relevant transport policies that complement a sustainable transport system.

关键词： Public transportation Analytic hierarchy process AHP Transport mode choice

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Angle control of antagonistic pneumatic driven and inflatable arm joint 17

Angle control of antagonistic pneumatic driven and inflatabl...

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17th IEEE International Conference on industrial Informatics, INDIN 2019

作者： Ogasawara, Hirofusa Yokota, Sho Matsumoto, Akihiro Chugo, Daisuke Hashimoto, Hiroshi Toyo University Graduate School of Science and Eng. Kawagoe Japan Toyo University Dept. of Mechanical Engineering Kawagoe Japan Kwansei Gakuin University School of Science and Technology Hyogo Japan Advanced Institute of Industrial Technology Master Program of Innovation for Design and Eng. Tokyo Japan

ISBN: (纸本)9781728129273

The conventional robot arms applied in various fields are demanded to have high force output, high accuracy, high efficiency. But they are seldom applied in human life, because of large weight, rigidity, hazards to people caused by collisions. Therefore the soft robotic arm that is stretchable, light weight, softness without possible of hazards, and high precision control is suitable to deploy in human life. Thus the purpose of this research is to develop the soft robotic arm by using antagonistic pneumatic driven system. In order to realize this concept, the joint activation mechanism is the key component. This study focuses on the angle control of the joint. In this paper, the robot arm made by polyethylene is proposed. Air bags made of polyethylene inside the joint achieve antagonistic driven states. Helical tube made of polyethylene is adhered joint outside for realizing rigidity. It is characterized that control rigidity is realized by controlling the pressure in the helical tube and joint angle is preciously controlled in two degree of freedom by controlling pressure in the air bags. Furthermore, the joint angle can be controlled by controlling the air pressures in the air bags using stretch sensor measuring joint angle. The experimental result confirmed that the driving concept of the joint was well functioned, and the joint angle control was realized by feedback control. © 2019 IEEE.

关键词： Robotic arms

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Development of a Tricalcium Silicate-Based Endodontic Repair Cement with ZnO: Evaluation of Radiopacity, Setting Behavior, and Cytotoxicity

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Ceramics International 2025年

作者： Giovane Augusto de Abreu Betinelli Anarela Bernardi Vassen Fabiano Raupp-Pereira Oscar Rubem Klegues Montedo Manuel Joaquim Ribeiro Tiago Bender Wermuth Sabrina Arcaro Graduate Program in Materials Science and Engineering (PPGCEM) Biomaterials and Nanostructured Materials Group Technical Ceramics Laboratory (CerTec) Universidade do Extremo Sul Catarinense (UNESC) 88806-000 Criciúma SC Brazil ProMetheus-Research Unit in Materials Energy and Environment for Sustainability Polytechnic Institute of Viana do Castelo (IPVC) Rua Escola Industrial e Comercial de Nun'Álvares Viana do Castelo Portugal

Calcium silicate-based cements are widely used in endodontics owing to their bioactive characteristics that stimulate tissue regeneration. However, finding an ideal material that meets the requirements of the physicochemical, mechanical, and biological properties for filling materials used in endodontics remains a significant challenge. This study aims to evaluate the physicochemical, mechanical and cytotoxic properties of a new nanostructured biocement based on tricalcium silicate (C 3 S) containing 20, 25, or 30 wt% ZnO synthesised through combustion at 600 ºC and subsequent heat-treatment at 1000 ºC. The C 3 S phase of the monoclinic polymorph, which is the most reactive among the available polymorphs, formed alongside a minority phase of dicalcium silicate. The concentrations were tested for setting time (Vicat), radiopacity (X-rays), endodontic flow (ISO 6876), compressive strength (ISO 9917), and antimicrobial activity using toxicity profiles (MTT). A complete characterisation of the crystal structure, functional groups, and morphology of the biocement was performed. The results indicate that the C 3 S-20% ZnO sample exhibits ideal characteristics for endodontic repairs with a short setting time (8.5 min), non-toxic cell viability in murine fibroblasts at concentrations of up to 25 wt% ZnO, and low endodontic flow (Ø=18.03 mm). These findings suggest that this new biomaterial can significantly improve endodontic treatments and contribute to advances in biomedicine. Future rheological research on biomaterials and animal models is essential to better understand their flow and interactions with biological tissues, broadening their clinical applicability.

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