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14th International Conference on Ubiquitous and Future Networks, ICUFN 2023

作者： Lee, Chang -Su Ji, U-Seok Jeon, Mi-Hyang Korea Univ. Dept. of Electronics & Information Engineering Sejong Korea Republic of R&d Center Riwha Networks Co Ltd Dept. IoT Service Development Cheongju Korea Republic of

ISBN: (纸本)9798350335385

In order for various IoTs to share information and collaborate on the internet, a common use environment and a lot of data transmission are inevitable. In this study, a distributed platform was designed, and an application service was implemented in which IoTs equipped with decentralized identifiers socialized with each other and collaborated using social networking. distributed platforms can reduce network usage costs by reducing network traffic, and decentralization can increase the efficiency of shared information protection between IoTs. © 2023 IEEE.

关键词： Internet of things

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WhaleOptNB: A Method for Automated Biomedical Text document Classification 7th

WhaleOptNB: A Method for Automated Biomedical Text Document ...

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7th International Conference on Intelligent Computing and Optimization, ICO 2023

作者： Kumar, S. Vishnu Chohan, Jasgurpreet Singh Kalita, Kanak Department of Electronics and Communication Engineering Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Avadi600062 India Department of Mechanical Engineering and University Centre for Research & Development Chandigarh University Mohali140413 India Department of Mechanical Engineering Vel Tech Rangarajan Dr Sagunthala R&D Institute of Science and Technology Avadi600062 India Jadara University Research Center Jadara University Irbid Jordan

ISBN: (纸本)9783031733239

In recent years, there has been a meteoric rise in the amount of digital information stored in the biomedical industry due to the rapid growth of the internet and other information technologies. Automated biomedical text classification has become an effective and robust method of accessing the increased amount of technical and medical literature in the biomedical sector through the classification of multiple source documents while preserving the significantly informative data to manage the enormous amount of biomedical data currently available. This is accomplished by automating the classification of multiple source documents in the biomedical field. Therefore, multi-document biomedical text classification plays an essential role in resolving the problem of gaining access to accurate and up-to-date information. A Whale Optimization Algorithm-based Weighted Naive Bayes Classifier (WhaleOptNB) for text document classification is proposed. A biomedical text document dataset is collected and preprocessed. Then, the preprocessed data's features are extracted using the Term Frequency-Inverse document Frequency (TF-IdF). To classify the biomedical text document, WhaleOptNB is utilized. To prove the efficiency of the proposed methodology, it is compared with existing methods. Simulation results show that the proposed method outperforms conventional methods. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Inverse problems

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Infrared Thermal Imaging for Embedded Child Presence detection System: Feasibility and Performance Evaluation

Infrared Thermal Imaging for Embedded Child Presence Detecti...

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IEEE International Conference on Consumer Electronics-Asia (ICCE-Asia)

作者： Cheol-Ho Choi Seongtaek Hong Eun Jin Jeong Joonhwan Han Pangyo Research and Development (R&D) Center Hanwha Systems Co. Ltd. Seongnam Republic of Korea

ISBN: (数字)9798331530839

ISBN: (纸本)9798331530846

In the automotive industry, regulations and standards mandate that Child Presence detection (CPd) systems must be installed. Most current CPd systems utilize radar or visible cameras to identify the presence or absence of objects based on bio-signals or movement information. However, these systems cannot determine if an emergency situation, such as heatstroke, occurs as the temperature inside the vehicle rises. In this paper, we propose an architecture for a thermal imaging-based CPd system that can perform simultaneous object detection, recognition, and status assessment, while also monitoring the internal environment of the vehicle. We further evaluate the feasibility of this thermal imaging-based CPd system in meeting the performance requirements outlined by regulations and standards for in-cabin use.

关键词： Support vector machines Image recognition Systems architecture radar imaging Cameras regulation Vectors Thermal analysis Standards Automotive engineering

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Improved Contrast Enhancement Algorithm for Night Vision Systems using Thermal Camera

Improved Contrast Enhancement Algorithm for Night Vision Sys...

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International SoC design Conference, ISOCC

作者： Cheol-Ho Choi Jeongwoo Cha Jonnhwan Han Hyunmin Choi Jungho Shin Pangyo Research and Development (R&D) Center Hanwha Systems Co. Ltd. Seongnam Republic of Korea

ISBN: (数字)9798350377088

ISBN: (纸本)9798350377095

Long-wave infrared-based thermal cameras employing uncooled detectors are extensively utilized in the night vision systems of autonomous driving platforms. In these cameras, contrast enhancement process is necessary to transition from low dynamic range to high dynamic range. Therefore, in this paper, we propose an improved contrast enhancement algorithm utilizing histogram equalization with gamma correction.

关键词： Night vision Histograms Visualization Heuristic algorithms detectors Cameras High dynamic range Autonomous vehicles

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Algorithm for LWIr Thermal Imaging Camera with Minimal Mechanical Shutter Utilization

Algorithm for LWIR Thermal Imaging Camera with Minimal Mecha...

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IEEE International Conference on Consumer Electronics-Asia (ICCE-Asia)

作者： Taehyun Kim Joonhwan Han Jeongwoo Cha Hyunmin Choi Jungho Shin Eunchong Kim Hyun Woo Oh Cheol-Ho Choi Seongtaek Hong Taehyung Kim Pangyo Research and Development (R&D) Center Hanwha Systems Co. Ltd. Seongnam Republic of Korea

ISBN: (数字)9798331530839

ISBN: (纸本)9798331530846

Uncooled LWIr (Long-Wave Infrared) thermal imaging cameras are characterized by non-uniformity. because infrared detectors exhibit nonlinear characteristics depending on the environmental temperature. In this paper, we propose a method to smoothly transition between a method of correcting non-uniformity using a shutter one time when the thermal imaging camera is not stable at the start-up, and a method of correcting non-uniformity by performing conventional NUC (Non-Uniformity Correction) when thermal image camera is stabilized. The proposed method was confirmed to have similar performance to the conventional method in which the thermal imaging camera uses the shutter several times during initial start-up. The conventional method closes the shutter multiple times to correct non-uniformity, which obscures information necessary for driving. In contrast, the proposed method closes the shutter only one time during initial start-up to correct non-uniformity, which does not obscure information necessary for driving. Therefore, it is suitable for auxiliary systems used in autonomous driving platforms.

关键词： Infrared detectors Temperature dependence Temperature detectors Cameras Automobiles Sun Thermal stability Autonomous vehicles

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Fast Object detection Algorithm using Edge-based Operation Skip Scheme with Viola-Jones Method

Fast Object Detection Algorithm using Edge-based Operation S...

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IEEE International Conference on Artificial Intelligence Circuits and Systems (AICAS)

作者： Cheol-Ho Choi Joonhwan Han Jeongwoo Cha Jungho Shin Hyun Woo Oh Pangyo Research and Development (R&D) Center Hanwha Systems Co. Ltd. Seongnam Republic of Korea

ISBN: (数字)9798350383638

ISBN: (纸本)9798350383645

Machine learning approaches are preferred over deep learning in embedded systems due to their resource efficiency. The widely adopted Viola-Jones method and related algorithms are selected for their high detection accuracy and reasonable processing speed. However, a limitation arises as processing time increases with additional classification iterations based on sub-window operations. To address this issue, we propose an enhanced object detection algorithm that incorporates the Viola-Jones method with edge component calibration and an edge-based operation skip scheme. The introduction of edge component calibration ensures detection performance comparable to conventional methods. This scheme, relying on edge values, significantly reduces unnecessary computations in the background, leading to a marked decrease in classification operations compared to conventional methods. Visual comparisons in experimental results demonstrate that our method increases the detection precision factor while maintaining recall. In terms of classification operations, our approach reduces their number by 31.38% to 85.78% compared to conventional methods. In simpler terms, our method improves processing speed by minimizing classification operations, making it well-suited for embedded systems with limited resource utilization.

关键词： Visualization Embedded systems Machine learning algorithms Image edge detection Object detection Transforms Classification algorithms

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development of high contrast EUV photoresist for narrow pitch C/H patterning 41

Development of high contrast EUV photoresist for narrow pitc...

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Advances in Patterning Materials and Processes XLI 2024

作者： Moon, Yonghoon do, Sungan Kim, Hana Kwon, Seungchul Park, Hoyoon Kang, Cheol Lee, Jae-Jun Ahn, Chanjae Androsov, dmitry Kim, Minsang Hong, Suk-Koo Material Development Team Semiconductor R&d Center Samsung Electronics Samsungjeonjaro 1-1 Gyeonggi-do Hwaseong-si Korea Republic of Material Research Center Samsung Advanced Institute of Technology Samsung Electronics Samsung-ro 130 Yeongtong-gu Gyeonggi-do Suwon-si Korea Republic of

ISBN: (纸本)9781510672208

The organic non-chemically amplified resist (non-CAr) materials have been developed for fine pitch contact hole patterning process to remove the acid blur of conventional chemically amplified resist (CAr) system, but non-CAr materials usually show lower contrast and sensitivity compared to conventional CAr materials, so additional improvements are needed for practical application. In this study, we developed new platforms of EUV PTd resist materials to overcome these limitations and enable fine pitch C/H patterning. The main target of our study is to reduce acid blur and to maintain chemical contrast compared to conventional CAr system by 1) finding better EUV-active structures, or 2) simultaneously generating polarity switching and molecular weight (M.W.) change, or 3) maximizing the M.W. change through the depolymerization. Those new resist materials have confirmed showing equivalent or higher contrast compared to conventional CAr, and also having good resolution in EUV C/H patterning evaluation. © COPYrIGHT SPIE. downloading of the abstract is permitted for personal use only.

关键词： Photoresists

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real-time direct Temperature Estimation of MEMS resonators Through Indirect Q-factor Measurement

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Journal of Institute of Control, robotics and Systems 2024年第8期30卷 848-852页

作者： Kim, Hak-Ju Jang, Woo-Hyeop Jung, Hyoung-Kyoon R&D Division Microinfinity Co.Ltd Korea Republic of Sensor Advanced Development Center Microinfinity Co.Ltd Korea Republic of

Extensive research have been conducted to improve the characteristics of resonant frequency with temperature variations in silicon resonators for various applications. However, temperature measurement delays due to temperature gradient across the chip make it challenging to improve temperature characteristics. This study proposes, a method of measuring the Q-factor of MEMS resonators in real time and estimating their temperature without any time delays using the measured Q-factor. The proposed real-time indirect Q-factor estimation method was validated based on ring-down Q-factor measurement method, and it is suitability for application in the operating environment of MEMS resonant accelerometers was assessed through acceleration-induced testing and temperature cycling tests. The experimental results on the variation of the resonant frequency with temperature validate an improvement in temperature estimation using the proposed method. The proposed method reduced temperature hysteresis characteristics from 3.2019Hz to 1.122Hz, achieving a 65% improvement. © ICrOS 2024.

关键词： Q factor measurement

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Microfacies types and distribution of epicontinental shale: A case study of the Wufeng–Longmaxi shale in southern Sichuan Basin, China

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Petroleum Exploration and development 2023年第1期50卷 57-71页

作者： WANG Hongyan SHI Zhensheng SUN Shasha ZHAO Qun ZHOU Tianqi CHENG Feng BAI Wenhua PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China National Energy Shale Gas R&D(Experiment)Center Langfang 065007China

For black shales,laminae and bedding are hard to identify,grain size is difficult to measure,and trace fossils do not *** the Ordovician Wufeng–Silurian Longmaxi shale in southern Sichuan Basin,China,as an example,the types,characteristics and models of microfacies in epicontinental shale are analyzed by means of full-scale observation of large thin sections,argon-ion polishing field emission-scanning electron microscopy(FE-SEM),and kerogen *** epicontinental sea develops delta,tidal flat and shelf facies,with black shale found in microfacies such as the underwater distributary channel and interdistributary bay under delta front facies,the calcareous and clayey flats under intertidal flat facies,the calcareous and clayey shelfs under shallow shelf facies,the deep slope,deep plain and deep depression under deep shelf facies,and the overflow under gravity flow ***,silty lamina decreases and clayey lamina increases,the grain size changes from coarse silt to fine mud,the silica content increases from about 20%to above 55%,the carbonate and clay minerals content decreases from above 40%to around 10%,and the kerogen type changes from type II2 to type II1 and type *** and topography dominate the types and distribution of shale *** underwater distributary channel,interdistributary bay,clayey flat,clayey shelf,and overflow microfacies are developed in areas with sufficient sediment *** calcareous flat and calcareous shelf are developed in areas with insufficient sediment *** deep shelf shale area is divided into deep slope,deep plain,and deep depression microfacies as a result of three *** formation of epicontinental shale with different microfacies is closely related to the tectonic setting,paleoclimate,and sea level *** relatively active tectonic setting increases the supply of terrigenous clasts,forming muddy water fine-grained *** warm and humid paleoclimate is conducive to the enric

关键词： shale gas shale microfacies sedimentary model epicontinental deep shelf Wufeng Formation Longmaxi Formation southern Sichuan Basin Sichuan Basin

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Ongoing Evolution of drAM Scaling via Third dimension -Vertically Stacked drAM -

Ongoing Evolution of DRAM Scaling via Third Dimension -Verti...

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Symposium on VLSI Technology

作者： J.W. Han S.H. Park M.Y. Jeong K.S. Lee K.N. Kim H.J. Kim J.C. Shin S.M. Park S.H. Shin S.W. Park J.H. Lee S.H. Kim B.C Kim M.H. Jung I.Y. Yoon H. Kim S.U. Jang K.J. Park Y.K. Kim I.G. Kim J.H Oh S.Y. Han B.S. Kim B.J. Kuh J.M. Park DRAM Technology Development Hwaseong Korea Next Generation Process Development Samsung R&D Center Hwaseong Korea

For the past decades, the density of drAM has been remarkably increased by making access transistors and capacitors smaller in size per unit area. However, shrinking devices far beyond the 10 nm process node increasingly poses process and reliability challenges. As Flash technology made a pivotal and successful innovation via 3d NANd, drAM technology may also adopt vertical stacking memory cells. Vertically stacked drAM (VS-drAM) continues to increase bit density on a die by increasing the number of layers along with reducing the size of the transistor. In this paper, the opportunities and challenges of VS-drAM are discussed.

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