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OCEANS 2024 - Halifax, OCEANS 2024

作者： Lee, Ye Jun Kim, Min-Gyu Shin, Myung-Jun Park, Tae Sung Kim, Jinhyung Kim, Sunghun Lee, Kichoon Lee, Jihun Min, Jeongtack Research Center Pohang Korea Republic of Pusan National University Hospital Pusan National University School of Medicine Department of Rehabilitation Medicine Busan Korea Republic of Institute of Technology Pusan National University Hospital Department of Convergence Medical Busan Korea Republic of Technical Research Center RNWare Co. Ltd Daegu Korea Republic of Gleam-Systems System Development Division Daejeon Korea Republic of Gleam-Systems Modeling and Simulation Division Daejeon Korea Republic of Marine Leisure Equipment R&d Center Pohang Korea Republic of

ISBN: (纸本)9798331540081

Scuba diving is a common aquatic leisure sport that many individuals enjoy in the sea. With the increasing number of people participating, there is a corresponding rise in related incidents and accidents. Typically, such events are caused by inadequate user proficiency with equipment, sudden onset of physical symptoms, failure to respond to external obstacles, and equipment malfunctions. As interest in scuba diving grows, the development of diver safety equipment that enhances convenience and usability through the interaction between divers and equipment is crucial, not only to assist underwater activities but also to preemptively prevent accidents. This paper explores the analysis of divers' physiological conditions and diver equipment evaluation criteria. Building upon this, it proposes a HrI(Human-robot Interaction) evaluation system to facilitate the research and development of safety equipment for secure scuba diving operations. © 2024 IEEE.

关键词： Human robot interaction

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Novel Temporary Bonding Film Adapted to Xenon Flash Lamp de-bonding System for FOWLP Application

Novel Temporary Bonding Film Adapted to Xenon Flash Lamp De-...

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作者： Matsubara, Hiroaki Shibata, Tomoaki Akasu, Yuta Ogawa, Saeko Kuroda, Ayaka Sobue, Shogo Packaging Solution Center AIRBIC 3F 7-7 Shin-Kawasaki Saiwai-ku Kawasaki-shi Kanagawa212-0032 Japan Advanced Technology Research & Development Center 48 Wadai Ibaraki Tsukuba-shi300-4247 Japan Packaging Materials R&D Department 14 Goiminamikaigan Ichihara-shi Chiba290-8567 Japan

***@*** bonding film (TBF) is one of the key materials for assembly process of fan out wafer level package (FOWLP). In this paper, we have proposed a novel TBF and xenon flash lamp de-bonding system. The TBF was mainly composed of cross-linkable and low-polarity polymers to meet the various requirement for not only easy peeling-off after assembly but also stability against thermal and chemical environment exposed in FOWLP process. In order to evaluate applicability of the developed material, die-first/face up test wafer was assembled. As a result, it was found that the TBF has high stability and can be de-bonded by xenon light irradiation. In addition, the die shift through assembly process was within the estimated range. These results offer that the developed TBF is practically applicable for FOWLP assembly process. © 2022 IMAPS-International Microelectronics and Packaging Society. All rights reserved.

关键词： Chemical stability

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Initial stage of degradation process of alumina-silica refractory by molten Al-5Mg alloy

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Keikinzoku/Journal of Japan Institute of Light Metals 2022年第11期72卷 631-637页

作者： Tamura, Yosuke Soda, Hiroshi McLean, Alexander Ishikawa, Takaaki Ishizuka, Michio Kawasaki, Masato Mizuno, Kentaro Motegi, Tetsuichi Department of Advanced Materials Science and Engineering Chiba Institute of Technology 2-17-1 Tsudanuma Chiba Narashino-shi275-0016 Japan University of Toronto TorontoONM5S 3E4 Canada Chiba Industrial Technology Research Institute Chiba Chiba-shi Japan R&D Center Ceramics Div. Rozai Kogyo Kaisha Ltd. Hyogo Ako-shi Japan Development Center AGC Ceramics Co. Ltd. Hyogo Takasago-shi Japan Zmag Ltd. Chiba Shiroi-shi Japan Chiba Institute of Technology Chiba Funabashi-shi Japan

Initial stages of the refractory degradation process by molten Al-5Mg alloy were investigated by analyzing the degradation structures caused by an interaction with molten metal during heat cycles. The refractory aggregate, found to be poly-crystalline, consisting of cristobalite (SiO2) and mullite (Al6Si2O13), was deteriorated ahead of the surrounding matrix. Metal permeated into the refractory, forming a thin metal layer along the crucible surface below the molten metal line at an early stage of degradation process, which would later serve as the bases for the metal infiltration path through the refractory above the molten metal line. A discontinuous film (thickness2O4, was formed at the "melt / refractory" interface. At the experimental temperature of 1150°C, Mg in the molten metal would build up as Mg gas at MgAl2O4 film/refractory interface and easily diffuse into the aggregate body and react with the aggregate components of SiO2 and Al6Si2O13 to form MgAl2O4 and Al-Mg-Si-O compounds. This was followed by the molten metal infiltration into the refractory while reducing the Al-Mg-Si-O compound to form MgAl2O4. Through the initial degradation process MgAl2O4 would finally form in a successive chain of reactions, resulting in deterioration of the crucible. © 2022 The Japan Institute of Light Metals.

关键词： Corundum

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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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Microstructure Changes and Shrinkage Characteristics of Cement Paste dried Under different relative Humidity: A Comparison with Cement Paste Containing Water-dispersible Polyurethane

SSRN

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SSrN 2024年

作者： Asamoto, Shingo Takahashi, Keisuke Sakamoto, Naoki Sampei, Tokio Matsui, Kunio Saitama University Japan Department of Civil and Environmental Engineering Saitama Japan Innovation Design Institute Kagawa University Japan Research and Development Center Mitsubishi UBE Cement Corporation Japan Platform Laboratory for Science and Technology Asahi Kasei Corporation Japan R&D Laboratories Asahi Kasei Homes Corporation Japan

This study investigated the microstructure and shrinkage characteristics of cement pastes (HPC) dried under varying relative humidity (rH) levels and compared them with those of cement paste containing water-dispersible polyurethane (PUC). Our analysis employed mercury intrusion porosimetry (MIP), water vapour sorption isotherms (WVSI), and small-angle X-ray scattering (SAXS) to explore the pore structures, surface characteristics, and microstructural changes of the C-S-H units. The MIP results showed that the PUC paste consistently had a larger total pore volume than the HPC paste regardless of the drying rH. HPC paste exhibited a significant shift in capillary pore size distribution at drying rH less than 60%, which was not pronounced in PUC paste. The WVSI results indicated higher water vapour adsorption in the HPC paste, with notable changes in the adsorption behaviour under different drying conditions. The PUC paste demonstrated reduced sensitivity of the WVSI to the drying rH, maintaining more stable microstructural properties. SAXS analysis revealed that the presence of polyurethane mitigated changes in the C-S-H microstructure during drying, with less variation in the disc thickness of the fractal disc-shaped particle model compared to that in the HPC paste. The weight and length change isotherms further confirm that the PUC paste experienced less shrinkage and hysteresis in both isotherms under varying rH. Overall, this study reveals that the shrinkage of cementitious materials is significantly influenced by C-S-H microstructural changes during initial drying, and mitigating these changes effectively reduces shrinkage. © 2024, The Authors. All rights reserved.

关键词： drying

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Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder Joint with Minor Elements Addition

Thermal Cycling Performance of Heterogeneous Sn-Ag-Cu Solder...

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Electronics Packaging technology Conference (EPTC)

作者： Joo Young Bae Mi-Song Kim Won Sik Hong Sehoon Yoo Jeong Tak Moon Sang-Bok Park Nam Hyun Kang Korea Electronics Technology Institute Gyeonggi-do Korea Korea Institute of Industrial Technology Incheon Korea Solder Development Team R&D Center MK Electron Co. Ltd. Gyeonggi-do Korea SNF Co. Ltd. Gyeonggi-do Korea Department of Materials Science and Engineering Pusan National University Busan Korea

ISBN: (数字)9798331522001

ISBN: (纸本)9798331522018

Coarse intermetallic compound (IMC) formation can lead to brittleness and generate cracks between the solder and the IMC interface under printed circuit board (PCB) warpage. Microstructure of the solder joint is closely related to its thermo-mechanical properties. Thus, it is essential to control the microstructure of the solder joint. Ball grid array (BGA) packages with 300 μm diameter Sn-3.0Ag-0.5Cu (SAC305) and Sn-2.5Ag-0.8Cu-0.05Ni-1.0Bi (SAC $(-\text{Ni}, \text{Bi}))$ solder balls were soldered with SAC305 solder paste on the PCB coupon. These combinations of homogeneous (SAC305 solder ball and paste) and heterogeneous (SAC(- Ni,Bi) solder ball and SAC305 paste) solder joints were prepared to compare solder joint reliability.

关键词： degradation Transmission line matrix methods Printed circuits Thermomechanical processes Electronic packaging thermal management reliability Microstructure Soldering Stress Thermal degradation

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Analysis of Electrode Configuration of Underwater Electric Field Sensor on Electric-Field-based Localization for Underwater robots

Analysis of Electrode Configuration of Underwater Electric F...

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International Conference on Control, Automation and Systems ( ICCAS)

作者： Jason Kim Ingyu Lee Meungsuk Lee Ki-Woong Bae Son-Cheol Yu Department of Convergence IT Engineering Pohang University of Science and Technology Pohang Korea Interactive Robotics R&D Division Korea Institute of Robotics and Technology Convergence Pohang Korea Agency for Defense Development Maritime Technology Research Institute Changwon Korea

This paper addresses the effects of electrode configurations of an underwater electric field sensor (EFS) on the localization of underwater robots when the robots used electric field measurements to estimate their positions. Around an underwater electric landmark that generates a known electric field signature, an underwater robot equipped with an EFS can measure the signature to localize itself by searching for the position that minimizes the difference between the actual measurement and the theoretical calculation that should be measured when the robot is located at the position. The underwater robot’s localization accuracy was analyzed in simulations when the robot was equipped with EFSs with different electrode configurations. In general, the electric field measurement accuracy and the consequent robot localization accuracy were higher when the robot was equipped with the EFS that consists of more electrodes. depending on the measurement conditions, however, the use EFSs with less electrodes was enough to perform sufficiently accurate localization of the robot. The proposed simulation method would contribute to suggest the optimal electrode configuration of the EFS, and therefore, the robot localization with the electric field measurements would become more energy-efficient with the use of the suggested cheap and small EFS.

关键词： Electrodes Location awareness Autonomous underwater vehicles Measurement uncertainty Electric variables measurement Position measurement robot sensing systems

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Improving Microgrid reliability and Efficiency Through Energy Storage Systems with a Pyramidal dilation Attention Convolutional Neural Network for renewable Energy Integration 4

Improving Microgrid Reliability and Efficiency Through Energ...

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4th International Conference on Sustainable Expert Systems, ICSES 2024

作者： Vijayakumar, Bondu Purushothaman, K.E. Khabiya, Priyanka Garg, Akriti rajesha, N. Kaliappan, S. Madanapalle Institute of Technology & Science Department of Electrical and Electronics Engineering Andhra Pradesh Annamayya517325 India Vel Tech Rangarajan Dr. Sagunthala R&d Institute of Science and Technology Department of Electronics and Communication Engineering Avadi Tamil Nadu Chennai600062 India Mandsaur University Department of Computer Science Engineering Madhya Pradesh Mandsaur458001 India Mahatma Jyotiba Phule Rohilkhand University Department of Electrical Engineering Uttar Pradesh Bareilly243006 India Sri Eshwar College of Engineering Department of Electronics and Communication Engineering Tamil Nadu Coimbatore641202 India Lovely Professional University Division of Research and Development Delhi Punjab Jalandhar144411 India

ISBN: (纸本)9798331540364

Microgrid (MG) design and deployment are heavily reliant on reliability. Integrating renewable energy sources (rESs) into power grids poses considerable challenges for maintaining grid reliability due to their intermittent nature. This paper proposes a novel approach to enhance grid stability by incorporating Energy Storage Systems (ESS) coupled with Pyramidal dilation Attention Convolutional Neural Network (PdACNN). The goal of the proposed method is to improve efficiency and lower electricity costs. The proposed PdACNN optimizes the control of Energy Storage Systems by providing more trustworthy forecasts of energy demand as well as supply. By, then the proposed method is implemented in MATLAB and evaluated their performance with various existing methods. The PdACNN method surpasses existing techniques in both efficiency and cost-effectiveness. It achieves a high efficiency of 95.7% and reduces total electricity costs to $650/kWh, outperforming the Artificial Neural Network (ANN), and recurrent NN (rNN) and Convolutional NN (CNN) methods. © 2024 IEEE.

关键词： Energy Storage Systems Grid Stability Microgrids Pyramidal dilation Attention Convolutional Neural Network reliability renewable Energy Sources

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residue super-resolution convolutional neural network based complexity reduction for H.266 VVC intra-coding

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ICT Express 2025年第3期11卷 460-466页

作者： dhanalakshmi, A. Balaji, L. raja, C. Giri, Jayant Alrashoud, Mubarak Department of ECE Panimalar Engineering College Chennai India Department of ECE Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology Chennai India Department of Mechanical Engineering Yeshwantrao Chavan College of Engineering Nagpur India Division of Research and Development Lovely Professional University Phagwara India Chair of Smart Technologies College of Computer and Information Sciences King Saud University Riyadh Saudi Arabia

Versatile Video Coding (VVC) promised to provide the same video quality as HEVC with 50 % bitrate reduction, which was introduced in 2020. Our suggested method for VVC Intra-coding is residue super-resolution convolutional neural network (rSr-CNN) utilizing downsampling and upsampling procedures. We present an effective complexity reduced VVC intra-coding scheme based on residue Sr-CNN. reducing an original video's resolution in both the vertical and horizontal directions is all that is required to execute down sampling. Increasing the video dimensions for improved visual quality, convolutional neural networks are utilized in the upsampling process to create residue super-resolution. Specifically, for every block, we train a CNN model to perform residue Sr after downsampling and compressing the residue at low resolution, and then we carry out motion estimation (ME) and motion compensation (MC) to extract the residue. Using the MC prediction signal, a new residue Sr-CNN is designed. Additionally, this work comprehensively examines the complexity and performance of VVC intra-coding tools and integrates them with the residue Sr-CNN method. The experiments demonstrate a substantial time savings of 40 % in encoding with BdBr coding gains of 4.2 %, and 2.9 % in AI and rA configurations respectively. © 2025 The Author(s)

关键词： Intra-coding Low complexity PSNr residue super-resolution convolutional neural network VVC

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Integration Cementing technology for Ultra-deep HTHP High Salinity and High Hydrogen Sulfide Well 11th

Integration Cementing Technology for Ultra-deep HTHP High Sa...

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11th International Field Exploration and development Conference, IFEdC 2021

作者： Gu, Yi-xin Baletabieke, Bahedaer Chen, Chi Han, Fei Qian, Feng Xiao, Yue Xiang, Ying Jing, Ning du, Yu Xiao, Xu CNPC Engineering Technology R&D Company Limited Beijing China Exploration Division PetroChina Southwest Oil and Gasfield Company Chengdu China China National Oil and Gas Exploration and Development Company Ltd. Beijing China China Petroleum Longhui Automation Engineering Co. Ltd. Langfang China China Petroleum Maintenance and Emergency Repair Company Langfang China

ISBN: (纸本)9789811921483

Well-M15 is an ultra-deep exploratory well deployed by CNPC in the Mingebulak project. Its geological conditions are complex, with the characteristics of high temperature, high pressure, high salt, high hydrogen sulfide, and ultra-deep——"four highs and one super". In the process of cementing, there are problems such as low displacement efficiency, easy mixing of cement slurry, complex formation pressure layers, and high requirements for casing accessories and special well-entry tools, which seriously affect the sealing effect and cementing quality. In view of the above difficulties, the cement slurry design of Well-M15 is based on the optimization of the mature system formula. Choose solid anti-salt fluid loss agent G33S for the second-spud, and choose matrix anti-invasion and anti-channeling agent BCG-200L for the third-spud, which has good salt resistance, temperature resistance and channeling resistance. At the same time, for the purpose of salt resistance, each level of casing cement slurry system is optimized to improve the specific cement slurry formula to meet the cementing needs. Large-size casing floating shoes and floating hoops focus on erosion resistance, while deep well cementing tools focus on high temperature and pressure resistance, which effectively guarantees cementing operations. The successful drilling of Well-M15 has set a series of new records for CNPC’s overseas projects, including the deepest casing of the same size, the largest injection volume, the longest one-time sealing section, the deepest application of graded cementing technology, and the highest density of cement slurry. At the same time, it has also created a new record of quality qualification rate and quality rate of deep well liner cementing in Uzbekistan, providing a reference for the cementing of deep wells and complex wells in similar blocks in the future. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Hydrogen sulfide

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