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2023 World Wide Web Conference, WWW 2023

作者： Kwon, Taehyung Ko, Jihoon Jung, Jinhong Shin, Kijung Kim Jaechul Graduate School of Ai Korea Advanced Institute of Science and Technology Seoul Korea Republic of Department of Computer Science and Engineering Jeonbuk National University Jeonju Korea Republic of

ISBN: (纸本)9781450394161

Many real-world data are naturally represented as a sparse reorderable matrix, whose rows and columns can be arbitrarily ordered (e.g., the adjacency matrix of a bipartite graph). Storing a sparse matrix in conventional ways requires an amount of space linear in the number of non-zeros, and lossy compression of sparse matrices (e.g., Truncated SVD) typically requires an amount of space linear in the number of rows and columns. In this work, we propose NeuKron for compressing a sparse reorderable matrix into a constant-size space. NeuKron generalizes Kronecker products using a recurrent neural network with a constant number of parameters. NeuKron updates the parameters so that a given matrix is approximated by the product and reorders the rows and columns of the matrix to facilitate the approximation. The updates take time linear in the number of non-zeros in the input matrix, and the approximation of each entry can be retrieved in logarithmic time. We also extend NeuKron to compress sparse reorderable tensors (e.g. multi-layer graphs), which generalize matrices. Through experiments on ten real-world datasets, we show that NeuKron is (a) Compact: requiring up to five orders of magnitude less space than its best competitor with similar approximation errors, (b) Accurate: giving up to 10 × smaller approximation error than its best competitors with similar size outputs, and (c) Scalable: successfully compressing a matrix with over 230 million non-zero entries. © 2023 ACM.

关键词： Matrix algebra

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620 nm Resonant-Cavity LEDs for high color purity and light output power enhancement

620 nm Resonant-Cavity LEDs for high color purity and light ...

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2024 Conference on Lasers and Electro-Optics/Pacific Rim, CLEO-PR 2024

作者： Prechatavanich, Natchanon Sutheebanjerd, Theeradech Keong, Yee Chee Wu, Ming-June Tseng, Yi-Tzu Wu, Chao-Hsing Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan Center for Quantum Science and Engineering National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan

Resonant cavity light-emitting diodes (RCLEDs) offer significant enhancements in spectral power density and linewidth. Around 52% of top DBR reflectivity is the optimal configuration, showing a 3.4-fold intensity incr... 详细信息

关键词： Light emitting diodes

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Direct Current Pulse Atmospheric Pressure Plasma Jet Treatment on Electrochemically Deposited NiFe/Carbon Paper and Its Potential Application in an Anion-Exchange Membrane Water Electrolyzer

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Langmuir 2024年第29期40卷 14978-14989页

作者： Yu, Shuo-En Su, Yu-Lun Ni, I-Chih Chuang, Yi-Cheng Hsu, Cheng-Che Wu, Chih-I Chen, Yong-Song Cheng, I-Chun Chen, Jian-Zhang Graduate School of Advanced Technology National Taiwan University Taipei City106319 Taiwan Institute of Applied Mechanics National Taiwan University Taipei City106319 Taiwan Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering National Taiwan University Taipei City106319 Taiwan Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-Tech Innovations National Chung Cheng University Chiayi Minhsiung621301 Taiwan Department of Chemical Engineering National Taiwan University Taipei City106319 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei City106319 Taiwan

An atmospheric pressure plasma jet (APPJ) is used to process electrochemically deposited NiFe on carbon paper (NiFe/CP). The reactive oxygen and nitrogen species (RONs) of the APPJ modify the surface properties, chemical bonding types, and oxidation states of the material at the self-sustained temperature of the APPJ. The APPJ treatment further enhances the hydrophilicity and creates a higher disorder level in the carbon material. Moreover, the metal carbide bonds of NiFe/CP formed in the electrochemical deposition (ED) process are converted to metal oxide bonds after APPJ processing. The potential application of APPJ treatment on NiFe/CP in alkaline water electrolysis is demonstrated. With more oxygen-containing species and better hydrophilicity after APPJ treatment, APPJ-treated NiFe/CP is applied as the electrocatalyst for the oxygen evolution reaction (OER) in alkaline water electrolysis. APPJ-treated NiFe/CP is also used in a custom-made anion-exchange membrane water electrolyzer (AEMWE);this should contribute toward realizing the practical large-scale application of AEM for hydrogen production. © 2024 The Authors. Published by American Chemical Society.

关键词： Hydrophilicity

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To Adapt Waveforms of Transcutaneous Electrical Stimulation for Effective Relief of Chronic Pain 17

To Adapt Waveforms of Transcutaneous Electrical Stimulation ...

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17th International Convention on Rehabilitation engineering and Assistive technology, i-CREATe 2024

作者： Oba, Ema Qin, Ruian Inda, Adan Jafet Garcia Zhou, Zhongchao Imamoǧlu, Nevrez Gomez-Tames, Jose Huang, Shaoying Yu, Wenwei Graduate School of Science and Engineering Chiba University Department of Medical Engineering Chiba Japan National Institute of Advanced Industrial Science and Technology Digital Architecture Research Center Tokyo Japan Chiba University Graduate School of Science and Engineering Chiba2638522 Japan Chiba University Center for Frontier Medical Engineering Chiba2638522 Japan Singapore University of Technology and Design Engineering Product Development Department Singapore487372 Singapore

ISBN: (纸本)9798350355154

Chronic pain is a serious disease that affects approximately one in five people worldwide. Transcutaneous electrical stimulation (TENS) can be used to stimulate C-nerve to promote endogenous opioid release, thus is expected to be a new method of chronic pain relief. It is a noninvasive, non-drug therapy that can be used at home. One problem is that TENS waveforms are inevitably deformed by the biological tissues between the skin surface and vicinity of the nerves. In addition, this deformation varies depend on the thickness of the individual's biological tissue layer. This deformation of waveforms might strongly affect the efficiency of chronic pain relief, though has not been taken into consideration by any related studies. In our previous study, a multi-layered tissue FEM (Finite Element Method) model was built to inspect the effect of the deformation of various TENS waveforms. However, the computation cost of FEM is too high to calculate a large amount of candidates to find better TENS waveforms. To solve this problem, this study proposed a machine learning based surrogate model for the FEM model and used it as a forward model to enable a gradient based adaption of TENS waveforms. Simulation results showed that the TENS waveforms taking into consideration the deformation could be found. This demonstrated the potential for adapting the TENS waveforms to individual variations. © 2024 IEEE.

关键词： Controlled drug delivery

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Organic X-Ray Image Sensors Using a Medium Bandgap Polymer Donor with Low Dark Current

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Energy & Environmental Materials 2024年第6期7卷 230-237页

作者： Jong-Woon Ha Seung Hun Eom Bo Kyung Cha Seyeong Song Hyeong Ju Eun Jong H.Kim Jong Mok Park BongSoo Kim Byoungwook Park Seo-Jin Ko Sung Cheol Yoon Changjin Lee In Hwan Jung Do-Hoon Hwang Department of Chemistry Chemistry Institute for Functional MaterialsPusan National UniversityBusan 46241Korea Division of Advanced Energy Materials Research Center Korea Research Institute of Chemical Technology(KRICT)Daejeon 34114Korea Electro-Medical Device Research Center Korea Electrotechnology Research Institute(KERI)Ansan 15588Korea Graduate School of Carbon Neutrality School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Molecular Science and Technology Ajou UniversitySuwon 16449Korea Research Center for Advanced Specialty Chemicals Korea Research Institute of Chemical TechnologyUlsan 44412Korea Department of Chemistry Ulsan National Institute of Science and Technology(UNIST)Ulsan 44919Korea Department of Organic and Nano Engineering Human-Tech Convergence ProgramHanyang University222 Wangsimni-roSeongdong-guSeoul 04763Korea

The development of portable X-ray detectors is necessary for diagnosing fractures in unconscious patients in emergency ***,this is quite challenging because of the heavy weight of the scintillator and silicon *** weight and thickness of X-ray detectors can be reduced by replacing the silicon layer with an organic *** study presents a novel bithienopyrroledione-based polymer donor that exhibits excellent photodetection properties even in a thick photoactive layer(~700 nm),owing to the symmetric backbone and highly soluble molecular structure of *** ability of bithienopyrroledione-based polymer donor to strongly suppress the dark current density(Jd~10−10 A cm^(−2))at a negative bias(−2.0 V)while maintaining high responsivity(R=0.29 A W−1)even at a thickness of 700 nm results in a maximum shot-noise-limited specific detectivity of D_(sh)^(*)=2.18×10^(13)Jones in the organic *** organic photodetectors are developed by slot-die coating for use in X-ray detectors,which exhibit D_(sh)^(*)=2.73×10^(12)Jones with clear rising(0.26 s)and falling(0.29 s)response times upon X-ray *** reliability is also proven by linear response of the X-ray detector,and the X-ray detection limit is 3 mA.

关键词： low dark current low detection limit organic photodetector printable X-ray

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Analysis of the Musculoskeletal Load Generated when a Small Dog Walks on a Slippery Floor

Analysis of the Musculoskeletal Load Generated when a Small ...

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2025 IEEE/SICE International Symposium on System Integration, SII 2025

作者： Li, Shijian Chugo, Daisuke Muramatsu, Satoshi Yokota, Sho She, Jin-Hua Hashimoto, Hiroshi Takashi, Uemura Kamishina, Hiroaki Hata, Yoshiharu Yamada, Takayuki Uchida, Takahiro Kwansei Gakuin University Graduate School of Science and Technology Hyogo Sanda6691330 Japan Tokai University School of Information Science and Technology Kanagawa Hiratsuka2591292 Japan Toyo University Faculty of Science and Engineering Saitama Kawagoe3508585 Japan Tokyo University of Technology School of Engineering Hachioji Tokyo1920982 Japan Advanced Institute of Industrial Technology Master Program of Innovation for Design and Engineering Shinagawa Tokyo1400011 Japan KyotoAR Animal Advanced Medical Center Kuse Kyoto6130034 Japan Rinrei Co. Ltd. Chuo Tokyo1040061 Japan

ISBN: (纸本)9798331531614

The objective of this paper is to identify the stresses placed on the musculoskeletal system when small dogs walk on floors with low friction coefficients. In many households, and small dogs in particular are often kept indoors. According to veterinary experience, it is known that small dogs kept indoors that walk with their lower limbs slipping cause a great deal of stress on the musculoskeletal system, and that the incidence of joint disease in the lower limbs of such small dogs is high. In this study, we measured the body movements of small dogs walking on slippery floors using a three-dimensional motion capture system and force plate system. Furthermore, by inputting these measurements into the musculoskeletal simulation model we have developed to simulate the musculoskeletal system of dogs, we derived the load on the musculoskeletal system of small dogs on slippery and non-slippery floors. As a result, it was identified that walking on a slippery floor causes a strong load on the lower limb muscles of small dogs. © 2025 IEEE.

关键词： Friction

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Three-Dimensional Topological Toron Domains in Magnetic Nanoparticles: A Micromagnetic Simulation

SSRN

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SSRN 2024年

作者： Dong, Shouzhe Liang, Deshan Guo, Changqing Wang, Jing Huang, Houbing School of Materials Science and Engineering Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology Beijing100081 China

Three-dimensional (3D) topological textures have attracted significant attention from researchers due to their distinctive spatial arrangements and intriguing physical properties. However, investigating their topologi... 详细信息

关键词： Aspect ratio

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Improved AlGaInP-based Red micro-LED with Sidewall Passivation via Atomic-Layer Deposition (ALD) and Sulfide Treatment

Improved AlGaInP-based Red micro-LED with Sidewall Passivati...

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2024 Conference on Lasers and Electro-Optics/Pacific Rim, CLEO-PR 2024

作者： Wu, Ming-June Prechatavanich, Natchanon Yee, Chee-Keong Sutheebanjerd, Theeradech Tseng, Yi-Tzu Wu, Chao-Hsin Graduate Institute of Photonics and Optoelectronics National Taiwan University Taipei Taiwan Graduate School of Advanced Technology National Taiwan University Taipei Taiwan Center for Quantum Science and Engineering National Taiwan University Taipei Taiwan Graduate Institute of Electronics Engineering National Taiwan University Taipei Taiwan

Improved AlGaInP-based red micro-LEDs are demonstrated, and we investigate the optoelectrical characteristics of mesa-sized 13x20 μm2 and 26x40 μm2 devices. Sidewall passivation using atomic-layer deposition (ALD) and ammonium sulfide (NH4)2Sx solution treatments resulted in enhanced external quantum efficiency (EQE) and light output power. © 2024 The Author(s)

关键词： III-V semiconductors

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Advancing Al-doped ZnO thin films structural,optical and electrical properties of low temperature PET substrates via flash lamp annealing

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Journal of Semiconductors 2024年第12期45卷 47-60页

作者： Juwon Lee Chang-Hyeon Jo Gwangseop Lee Min-Sung Bae Slawomir Prucnal Shengqiang Zhou Muhammad Zubair Khan Osama Gohar Mohsin Saleem Jung-Hyuk Koh Graduate School of Intelligent Energy and Industry Chung-Ang UniversityHeukseok-roSeoulRepublic of Korea School of Electrical and Electronic Engineering Chung-Ang UniversitySeoulRepublic of Korea Helmholtz-Zentrum Dresden-Rossendorf Institute of Ion Beam Physics and Materials ResearchBautzner Landstraße 40001328DresdenGermany Department of Materials Science and Engineering Pak-Austria Fachhochschule:Institute of Applied Sciences and TechnologyMangHaripur22621Khyber PakhtunkhwaPakistan Department of Mechanical and Electrical Systems Engineering Graduate School of EngineeringKyoto University of Advanced ScienceGotanda-choYamanouchiUkyo-kuKyoto 615-8577Japan School of Chemical and Materials Engineering(SCME) National University of Sciences&Technology(NUST)H-12Islamabad 44000Pakistan

In this study, aluminum-doped zinc oxide(AZO) thin films were deposited onto a low-temperature polyethylene terephthalate(PET) substrate using DC magnetron sputtering. Deposition parameters included power range of 100-300 W, a working pressure of 15 mTorr, and a substrate temperature of 50 ℃. Post-deposition, flash lamp annealing(FLA) was employed as a rapid thermal processing method with a pulse duration of 1.7 ms and energy density of 7 J·cm-2, aimed at enhancing the film's quality while preserving the temperature-sensitive PET substrate. FLA offers advantages over conventional annealing,including shorter processing times and improved material properties. The structural, optical, and electrical characteristics of the AZO films were assessed using X-ray diffraction, field emission scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, ultraviolet-visible spectroscopy, and Hall effect measurements. The results demonstrated that properties of AZO films varied with deposition and annealing conditions. Films deposited at 200 W and subjected to FLA exhibited superior crystallinity, with average visible light transmittance exceeding 80% and resistivity as low as 0.38 Ω·cm representing 95%improvement in transmittance. Electrical analysis revealed that carrier concentration, mobility, and resistivity were influenced by both sputtering and annealing parameters. These findings underscore the effectiveness of FLA in optimizing AZO thin film properties, highlighting potential in optoelectronics applications.

关键词： flash lamp annealing AZO thin film PET sputtering

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A unique Janus PdZn-Co catalyst for enhanced photocatalytic syngas production from CO_(2) and H_(2)O

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Chinese Chemical Letters 2023年第7期34卷 265-268页

作者： Dongxue Zhou Xiangdong Xue Qingjie Luan Liguo Zhang Baozhen Li Xing Wang Wenjun Dong Ge Wang Changmin Hou Beijing Advanced Innovation Center for Materials Genome Engineering Beijing Key Laboratory of Function Materials for Molecule&Structure ConstructionSchool of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Shunde Graduate School of University of Science and Technology Beijing Foshan 528399China State Key Laboratory of Inorganic Synthesis&Preparative Chemistry College of Chemistry.Jilin UniversityChangchun 130012China

The development of excellent catalyst to achieve photocatalytic syngas production from CO_(2) and H_(2)O is a prospective and sustainable strategy to alleviate environment and energy crisis. In this study, a unique Janus PdZn-Co catalyst is prepared by annealed the Pd/IRMOF-3(Co, Zn) precursor. Due to the strong interaction, the electron transfers from PdZn terminal to Co terminal in the Janus structure. The electron-received Co terminal facilitates Co sites coordinate with the electrophilic C atom of CO_(2) and the electron-donated PdZn center is easier to coordinate with nucleophilic O atoms of H_(2)O or C=O *** charge redistribution enhances the absorption of CO_(2) and H2O, which promotes H_(2) evolution and CO production. In addition, the carbon shell effectively suppresses the metal core agglomeration and facilitates the electron transmission from photosensitizer to metallic active sites. Meanwhile, the ratio of CO/H_(2) can be regulated(~3:1 to 2:1) by adjusting the proportion of Co and PdZn. The Janus structure and graphite carbon synergistically play a profound impact on improving the photocatalytic *** optimized PdZn-Co catalyst exhibits a superior photocatalytic CO production rate(20.03 μmol/h) and the H_(2) generation rate(9.90 μmol/h) with a ratio of CO/H_(2)= 2.02.

关键词： PdZn@C catalyst Janus structure Charge redistribution Absorption modulation Photocatalyst

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