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24th International Congress on Acoustics, ICA 2022

作者： Miyairi, Toru Shimomura, Hisato Shirasaka, Takeshi Otomo, Takashi Toi, Takeshi Graduate School of Science and Engineering Chuo University Japan Research and Development Department Tokyo Metropolitan Industrial Technology Research Institute Japan R&D Department Alps Alpine Co. Ltd. Japan Department of Science and Engineering Chuo University Japan

rotary switches are used in various in-vehicle devices and home appliances. It is well known that operating experience contributes to the overall user perception of product quality. This study examines the effect of sound on user perception during rotary switch operation. To this end, experiments were conducted in which participants were asked to evaluate their experience during switch operation corresponding to various values of click torque and in the presence and absence of sound. We used Japanese onomatopoeic expressions to evaluate the magnitude of tactile impressions-the participants rated the degree of consonance between their operating experience and the onomatopoeic expressions in each case on a 7-point scale. The results revealed that the scores of onomatopoeias conveying smooth impressions (e.g.,/suru-suru/) decreased in the presence of sound. In contrast, the scores of onomatopoeias conveying hard impressions (e.g., kata-kata/) increased in the presence of sound. The difference was particularly obvious corresponding to low values of click torque. These conclusions are expected to contribute to the complete understanding of the effects of auditory feedback on the operating experience of rotary switches. © ICA *** rights reserved

关键词： auditory feedback multi-modal perception rotary switch

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Green synthesis of multifunctional carbon dots for anti-cancer and anti-fungal applications

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Chinese Journal of Chemical Engineering 2021年第9期34卷 97-104页

作者： Shaojing Zhao Li Huang Yong Xie Bin Wang Feng Wang Minhuan Lan Hunan Provincial Key Laboratory of Micro&Nano Materials Interface Science College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of the Discovery and Development of Novel Pesticide Shenyang Sinochem Agrochemicals R&D Co.Ltd.Shenyang 110021China Key Laboratory of Materials Chemistry for Energy Conversion and Storage of Ministry of Education Hubei Key Laboratory of Material Chemistry and Service FailureSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Carbon dots(Cds)have become popular nanomaterials in biomedical and agricultural *** we synthesized multifunctional Cds which showed anti-cancer and anti-fungal *** low cytotoxicity,stable fluorescence and high photothermal conversion efficiency enable the Cds with imagingguided photothermal *** Cds also exhibited intrinsic anti-fungal activity even at a low concentration,i.e.,40 mg·L^(-1) of Cds induced 20%mortality in cucumber downy ***,the largeπ-conjugated nanostructure and the richness of amino and hydroxyl groups make them a powerful delivery platform for flumorph(a fungicide)with a high loading efficiency of 47.18%.Meanwhile,the heat converted from the light can accelerate the release of flumorph from Cds,and thus efficiently kill fungus.

关键词： Carbon dots Photothermal therapy Anti-fungus delivery Pesticide

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Etching dynamics of Geometrically Confined Silicon Nanostructure

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Microscopy and Microanalysis 2022年第S1期28卷 126-127页

作者： Koo, Kunmo Chang, Joon Ha Ji, Sanghyeon Choe, Jacob Shin, Seungmin Lee, Geun-Taek Kim, Tae-Hong Yuk, Jong Min Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology Daejeon Republic of Korea Advanced Core Equipment Engineering & Development P/J Semiconductor R&D Center Samsung Electronics Hwaseong Republic of Korea

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Functionally graded structure of a nitride-strengthened Mg_(2)Si-based hybrid composite

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Journal of Magnesium and Alloys 2024年第3期12卷 1239-1256页

作者： Jeongho Yang Woongbeom Heogh Hogi Ju Sukhyun Kang Tae-Sik Jang Hyun-do Jung Mohammad Jahazi Seung Chul Han Seong Je Park Hyoung Seop Kim Susmita Bose Amit Bandyopadhyay Martin Byung-Guk Jun Young Won Kim dae-kyeom Kim rigoberto CAdvincula Clodualdo Aranas Jr Sang Hoon Kim School of Mechanical Engineering Pusan National UniversityBusan 46241Republic of Korea Department of Mechanical Design Engineering Hanyang UniversitySeoul 04763Republic of Korea Process Research 3 Team LG Display Co.Ltd.PajuGyeonggi-do 10845Republic of Korea Department of Materials Science and Engineering Chosun UniversityGwangju 61452Republic of Korea Institute of Well-Aging Medicare&Chosun University LAMP Center Chosun UniversityGwangju 61452Republic of Korea Division of Materials Science and Engineering Hanyang UniversitySeoul 04763Republic of Korea Department of Mechanical Engineering École de Technologie SupérieureMontrealQuebec H3C 1K3Canada Material&Component Convergence R&D Center Korea Construction Equipment Technology InstituteGunsanJeollabuk-do 54002Republic of Korea School of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 639798Singapore Graduate Institute of Ferrous&Eco Materials Technology Pohang University of Science and TechnologyPohangGyeongsangbuk-do 37673Republic of Korea Advanced Institute for Materials Research Tohoku UniversitySendai 980-8577Japan Institute for Convergence Research and Education in Advanced Technology Yonsei UniversitySeoul 03722Republic of Korea School of Mechanical and Materials Engineering Washington State UniversityPullmanWashington 99164USA School of Mechanical Engineering Purdue UniversityWest LafayetteIndiana 47907USA Research Institute of Advanced Manufacturing Technology Korea Institute of Industrial TechnologyIncheon 21999Republic of Korea Department of Macromolecular Science and Engineering Case Western Reserve UniversityClevelandOhio 44106USA Department of Chemical and Biomolecular Engineering and Joint Institute for Advanced Materials University of TennesseeKnoxvilleTennessee 37996USA Center for Nanophase Materials and Sciences Oak Ridge National LaboratoryOak RidgeTennessee 37830USA Department of Mechanical Engineering University of New BrunswickFrederictonNew Brunswick E3B 5A3Cana

The ex-situ incorporation of the secondary SiC reinforcement,along with the in-situ incorporation of the tertiary and quaternary Mg_(3)N_(2) and Si_(3)N_(4) phases,in the primary matrix of Mg_(2)Si is employed in order to provide ultimate wear resistance based on the laser-irradiation-induced inclusion of N_(2) gas during laser powder bed *** is substantialized based on both the thermal diffusion-and chemical reactionbased metallurgy of the Mg_(2)Si–SiC/nitride hybrid *** study also proposes a functional platform for systematically modulating a functionally graded structure and modeling build-direction-dependent architectonics during additive *** strategy enables the development of a compositional gradient from the center to the edge of each melt pool of the Mg_(2)Si–SiC/nitride hybrid ***,the coefficient of friction of the hybrid composite exhibits a 309.3%decrease to–1.67 compared to–0.54 for the conventional nonreinforced Mg_(2)Si structure,while the tensile strength exhibits a 171.3%increase to 831.5 MPa compared to 485.3 MPa for the conventional *** outstanding mechanical behavior is due to the(1)the complementary and synergistic reinforcement effects of the SiC and nitride compounds,each of which possesses an intrinsically high hardness,and(2)the strong adhesion of these compounds to the Mg_(2)Si matrix despite their small sizes and low concentrations.

关键词： Laser powder bed fusion Mg_(2)Si-SiC/nitride hybrid composite Both the thermal diffusion-and chemical reaction-based metallurgy Functionally graded structure Compositional gradient Wear resistance.

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Microstructural Study on the Slope of Plateau Pressure in Tife0.8al0.2 Hydrogen Storage Alloy

SSRN

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SSrN 2023年

作者： Kwon, Hong Gi Jung, Sojin Ko, Won-Seok Kwag, ryun-Ho Lee, da Hye Na, Tea-Wook Kim, Seongtak Park, Sangwon Park, Hyung-Ki Functional Materials and Components R&D Group Korea Institute of Industrial Technology Gangneung25440 Korea Republic of Department of Materials Science and Engineering Inha University Incheon22212 Korea Republic of Pohang37666 Korea Republic of

This study analyzed the reason for the large slope of plateau pressure in a TiFe0.8Al0.2 alloy. In the TiFe0.8Al0.2 alloy, the Ti2Fe phase was precipitated, and the B2 phase was separated into two B2 phases. The first hydrogenation kinetics was analyzed, and the alloy absorbed hydrogen at room temperature without any thermal activation process by forming the Ti2Fe phase. The hydrogen absorption and desorption behaviors were examined, and the slope of the plateau pressure was severely formed. The two B2 phases had different compositions, resulting in a difference in the lattice constant. The hydride-forming enthalpies were calculated through a density function theory calculation using the compositions of the two B2 phases, and the values of the two B2 phases were different. Therefore, it was confirmed that the slope of the plateau pressure was severely formed because of the separation of the B2 phase. © 2023, The Authors. All rights reserved.

关键词： Enthalpy

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Experimental Study of Wavelet-OFdM radio Communication System for AUVs Under Seawater

Experimental Study of Wavelet-OFDM Radio Communication Syste...

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European Conference on Antennas and Propagation, EuCAP

作者： ryosuke Hasaba Kazuhiro Eguchi Toshiyuki Wakisaka Hiroshi Satoh Jiro Hirokawa Miyuki Hirose Tohlu Matsushima Yuki Fukumoto Yuya Nishida Kazuo Ishii Department of Electrical and Electronic Engineering Tokyo Institute of Technology Tokyo Japan Department of Electrical and Electronic Engineering Kyushu Institute of Technology Fukuoka Japan R&D Division Panasonic Connect Co. Ltd. Fukuoka Japan Development Center Panasonic System Networks R&D Lab. Co. Yokohama Japan

AUVs are used for marine resource exploration, and although acoustic, laser, etc., are often used for wireless communication for AUVs, wireless communication using rF signals is being studied. By placing the VNA in a waterproof container, we measured the insertion loss between the antennas under seawater and obtained good results with simulation results. Furthermore, using a Wavelet-OFdM module as the communication method, a maximum communication speed of 6.8 Mbps was achieved with the antennas embedded in the AUV immersed in seawater.

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Sulfonated Graphene Oxide Linked with Alkali Metal Ions Membranes for Proton Conductivity in Hydrogen Production from Water Electrolysis

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SSrN 2024年

作者： Wei-Song, Hung Subrahmanya, T.M. Chi, Yang Jo Nayak, Smrutiranjan Abebe, Shalligito Habetamu Kadja, Grandprix T.M. Hu, Chien-Chieh Lee, Kueir-rarn Lai, Juin-Yih Advanced Membrane Materials Research Center Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology Taipei10607 Taiwan Bandung Institute of Technology Indonesia R&D Center for Membrane Technology Chung Yuan University Chung-Li32023 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Taoyuan32023 Taiwan

Amid technological advances, rising energy demand, and environmental concerns, countries endorse green energy solutions. Prominent among them is hydrogen production via clean water electrolysis, a key strategy for sustainable development. Herein, to address the limitations of expensive and potentially harmful Nafion membranes, we have developed a new graphene oxide (GO) series membranes (hydrophilic sulfonated GO (GO-SO3H) linked with monovalent alkali metal ions were synthesized to fabricate the membranes) to be used in water electrolysis for hydrogen production by introducing the iodide oxidation reaction (IOr) as an alternative to the traditional oxygen evolution reaction (OEr). Various modifications by sulfuric acid, methanol, and different alkali metal hydroxides (LiOH, NaOH, KOH) result in membranes with distinct properties. Characterization techniques, including ATr-FTIr, SEM, AFM, Xrd, water contact angle (WCA), and electrochemical impedance spectroscopy (EIS), validated the modifications, assessed membrane morphology, interlayer spacing, hydrophilicity, and electrical properties. Among the membranes, GO-SO3K stood out, exhibiting the highest proton conductivity (119.16 mS) and superior potassium ion permeability (20.382 cm/s). Importantly, all GO series membranes demonstrate excellent stability in the electrochemical system. The findings suggested that GO-SO3K holds promise as a potassium ion-conductive membrane for efficient and sustainable hydrogen production, offering a viable alternative to conventional Nafion membranes in water electrolysis applications. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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different doping of biomass-derived carbon dots effect on the degradation efficiency of methylene blue 3

Different doping of biomass-derived carbon dots effect on th...

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3rd International Conference on Optoelectronic Science and materials, ICOSM 2021

作者： Han, Yu Peng, Yuan Zhang, Hongyan Beijing Key Laboratory of Clothing Materials R&D and Assessment Beijing Engineering Research Center of Textile Nanofiber Beijing Institute of Fashion Technology Beijing100029 China

ISBN: (数字)9781510649323

ISBN: (纸本)9781510649316

Carbon dots (Cds) not only inherit the advantages of good biocompatibility and abundant raw material sources, but also exhibit excellent optical properties. Cds possess important research significance and application prospects in materials science, biomedicine, and catalytic degradation. In this paper, Cds were prepared from dandelions mixed with boric acid, urea, and norfloxacin respectively. We investigated the effect on the degradation efficiency of methylene blue (MB) using boron, nitrogen, and fluorine for co-doping Cds under solar light. results show that nitrogen-doped Cds can improve photocatalytic degradation rate up to 55% which is higher than no doped Cds. That also is the best among boron-doped, fluorine-doped, and co-doping Cds with the two or three elements co-doping. © 2021 SPIE.

关键词： Boric acid

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Flow numerical simulation of tubing or casing leakage in gas well

Flow numerical simulation of tubing or casing leakage in gas...

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Abu dhabi International Petroleum Exhibition and Conference 2020, AdIP 2020

作者： Zhang, Hong Yuan, Guangjie Li, Guotao Li, Jingcui Wan, Jifang Fu, Pan CNPC Engineering Technology R&D Company Limited Research Institute of Petroleum Exploration and Development CNPC Engineering Technology R&D Company Limited

ISBN: (纸本)9781613997345

Tubing or casing leakage of HTHP gas wells and underground gas storage wells affects wellbore integrity adversely. The wellbore micro-leakage detection technology can detect tiny fluid leakage in time and is of great significance to avoid malignant gas leakage accident. The theoretical basis of wellbore microleakage detection technology is characterizing the leakage flow field. To reveal the flow characteristics of gas leakage due to tubing and casing cracks and perforations, a CFd model of gas aperture leak has been established and flow field numerical simulation of high-speed and high-pressure gas outflow through aperture was conducted. The standard k-e turbulence model was used to calculate and analyze the pressure and velocity distribution of the steady flow field. In addition, a time step was set on the steady-state model and the Scale-Adaptive Simulation (SAS) model was adopted to simulate the transient flow field with the initial conditions of the steady-state simulation results. The effects of the shape and size of the leakage hole, the pressure inside the pipe, and the medium in the outer annular space on the flow field were analyzed. The results show that obvious turbulence disturbance appears near the inlet of the leakage hole and supersonic under-expansion jet forms near the outlet of the leakage hole under the gas well working conditions, creating the expansion wave and shock wave. The flow velocity of gas leakage through the circular hole is the highest, while that of the slot hole is the lowest under the same conditions. The larger the leakage aperture is, the greater the pressure difference between inside and outside of the pipe is, and the more drastic variation of gas velocity in the leakage hole. The method and results provide theoretical guidance for the microleakage detection technology of gas well wellbore. © 2020, Society of Petroleum Engineers

关键词： Flow fields

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Multi-spectral uncooled infrared sensors fabricated using encapsulated metal–insulator–metal plasmonic metamaterial absorbers 49

Multi-spectral uncooled infrared sensors fabricated using en...

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Infrared technology and Applications XLIX 2023

作者： Ogawa, Shinpei Ueno, Hiroshi Yamagishi, Takatoshi Tomii, Hideaki Yamamoto, Hiroshi Takenouchi, Sho Kimata, Masafumi Advanced Technology R&D Center Mitsubishi Electric Corporation 8-1-1 Tsukaguchi-Honmachi Amagasaki Hyogo661-8661 Japan Research & Development Center Nohmi Bosai Ltd. 1-18-13 Chuo Misato Saitama341-0038 Japan Product Development Business Kodenshi Corp. 161 Jyuichi Makishima-cho Uji Kyoto611-0041 Japan 2-1-9 Suimeidai Kawanishi Hyogo666-0116 Japan

ISBN: (数字)9781510661837

ISBN: (纸本)9781510661820

Multispectral uncooled infrared (Ir) sensors are attracting interest for use in applications such as gas analysis, hazardous material recognition, and biological analysis. However, conventional sensors require additional filters or a resonant structure in the vertical direction. To address this challenge, we investigated plasmonic metamaterial absorbers (PMAs) such as plasmonic crystals (PCs), metal–insulator–metal (MIM), and mushroom-type PMAs. Such PMAs exhibit wavelength-selective absorption by surface plasmon resonance (SPr, and the absorption wavelength can be controlled by modifying the features of the surface pattern (e.g., the periodicity of dimples and the micropatch size). Previously, we fabricated thermopiles with PC-type PMAs and used them for wavelength-selective detection. Although PC-type PMAs have advantages such as easy fabrication, robustness against structural fluctuations, and a wide operating wavelength range, they suffer from an incidence-angle dependence and require a large absorber volume. Here, we fabricated thermopiles with encapsulated MIM (EMIM)-type PMAs using a complementary metal oxide semiconductor process. The devices consist of a top encapsulated layer, periodic top micropatches, a flat insulator layer, and a bottom reflector. The encapsulated layer functions as a protective layer. Like MIM-type PMAs, the EMIM-type PMAs exhibit incidence-angle independence and a thin absorber volume, where the top micropatch induces localized SPr with the bottom reflector, and its size mainly determines the absorption wavelength. Spectral measurements showed that wavelength-selective Ir detection can be performed in the mid-Ir wavelength range without any additional filters. We expect the obtained results to contribute to the realization of advanced functional uncooled Ir sensors and expand their range of applications. © 2023 SPIE.

关键词： CMOS integrated circuits

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