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Vertically Integrated Electronics: New Opportunities from Emerging Materials and Devices

Nano-Micro Letters 2022年第12期14卷 195-223页

作者： Seongjae Kim Juhyung Seo Junhwan Choi Hocheon yoo Department of Electronic Engineering Gachon University1342 Seongnam-daeroSujeong-guSeongnamGyeonggi-do 13120Republic of Korea Center of Bio-Integrated Electronics Northwestern UniversityEvanstonIL 60208USA Querrey Simpson Institute for Bioelectronics Northwestern UniversityEvanstonIL 60208USA Present Address:Department of Chemical Engineering Dankook University152 Jukjeon-roSuji-guYonginGyeonggi-do 16890Republic of Korea

Vertical three-dimensional(3D)integration is a highly attractive strategy to integrate a large number of transistor devices per unit *** approach has emerged to accommodate the higher demand of data processing capability and to circumvent the scaling limitation.A huge number of research efforts have been attempted to demonstrate vertically stacked electronics in the last two *** this review,we revisit materials and devices for the vertically integrated electronics with an emphasis on the emerging semiconductor materials that can be processable by bottom-up fabrication methods,which are suitable for future flexible and wearable *** vertically stacked integrated circuits are reviewed based on the semiconductor materials:organic semiconductors,carbon nanotubes,metal oxide semiconductors,and atomically thin two-dimensional materials including transi-tion metal *** features,device performance,and fabrication methods for 3D integration of the transistor based on each semiconductor are ***,we highlight recent advances that can be important milestones in the vertically integrated elec-tronics including advanced integrated circuits,sensors,and display *** are remaining challenges to overcome;however,we believe that the vertical 3D integration based on emerging semiconductor materials and devices can be a promising strategy for future electronics.

关键词： Vertical stacking Three-dimensional integration Metal routing Via-hole Two-dimensional semiconductors

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Visualization and level-of-detail of metadata for interactive exploration of Sensor Web

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International Journal of Digital Earth 2014年第11期7卷 847-869页

作者： Byounghyun yoo V.Judson Harward Imaging Media Research Center Korea Institute of Science and TechnologySeoulKorea Faculty of Arts and Sciences Harvard UniversityCambridgeMAUSA

There are several issues with Web-based search interfaces on a Sensor Web data *** can be difficult to(1)find the proper keywords for the formulation of queries and(2)explore the information if the user does not have previous knowledge about the particular sensor systems providing the *** investigate how the visualization of sensor resources on a 3D Web-based Digital Earth globe organized by level-of-detail(LOD)can enhance search and exploration of information by easing the formulation of geospatial queries against the metadata of sensor *** case study provides an approach inspired by geographical mashups in which freely available functionality and data are flexibly *** use PostgreSQL,PostGIS,PHP,and X3D-Earth technologies to allow the Web3D standard and its geospatial component to be used for visual exploration and LOD control of a dynamic *** goal is to facilitate the dynamic exploration of the Sensor Web and to allow the user to seamlessly focus in on a particular sensor system from a set of registered sensor networks deployed across the *** present a prototype metadata exploration system featuring LOD for a multiscaled Sensor Web as a Digital Earth application.

关键词： Sensor Web datavisualization Sensor Web data discovery and search level-of-detail metadata visualization Web3D standard extensible 3D graphics X3D geospatial component

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Mismatching between nest volume and clutch volume reduces egg survival and fledgling success in black-tailed gulls

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Current Zoology 2016年第5期62卷 451-456页

作者： Who-Seung LEE Jeong-Chil yoo Korea Institute of Ornithology and Department of Biology Kyung Hee University Seoul 02447 Korea Center for Stock Assessment Research University of California Santa Cruz Santa Cruz CA 95080 USA

A longstanding suggestion posits that parents prefer to match nest volume and clutch size （clutch volume）, but few studies have tested this in colonial seabirds that nest in the open. Here, we demonstrate the effects of nest-clutch volume matching on egg survival, hatching, and fledgling success in black-tailed gulls Larus crassirostris on Hongdo Island, Korea. We show that the volume mismatch, defined as the difference between nest volume and total egg volume （the sum of all eggs＇ volume in the clutch）, was positively related to egg and chick mortality caused by predation, but was not significantly related to hatching success incurred by insulation during the incubation period. Although nest volume was negatively related to laying date, we found that the mismatch was positively related to laying date. Our results support the claim that well-matched nest-clutch volume may contribute to survival of eggs and chicks, and ultimately breeding success.

关键词： black-tailed gulls clutch size egg survival fledgling success nest volume.

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Goal-Based Automated Code Generation in Self-Adaptive System

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Journal of Computer Science & Technology 2010年第6期25卷 1118-1129页

作者： Joonhoon Lee Jeongmin Park Giljong yoo Eunseok Lee Department of Electrical and Computer Engineering Sungkyunkwan University Department of Software Engineering Dongyang Mirae University

System administrator deals with many problems,as computing environment becomes increasingly *** with an ability to recognize system states and adapt to resolve these problems offer a *** experience and knowledge are required to build a self-adaptive ***-adaptive systems have inherent *** paper proposes a technique that automatically generates the code for the self-adaptive *** the system is easier to ***-adaptive systems of previous research required high system resource *** operation could be invoked by external factors such as *** propose an improved self-adaptive system approach and apply it to video conference system and robot *** compared the lines of code,the number of classes created by the *** have confirmed this enhanced approach to be effective in reducing these development metrics.

关键词： self-adaptive self-healing goal graph activation switch error detection

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Fabrication of zinc-based coordination polymer nano-cubes and post-modification through copper decoration

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Nano Research 2018年第11期11卷 5890-5901页

作者： Ngoc Minh Tran Hien Duy Mai Hyojong yoo Department of Chemistry Hallym University Chuncheon Gangwon-do 24252 Republic of Korea

Coordination polymer particles (CPPs) with a high degree of porosity and multi-functional reaction sites are promising for diverse applications. The integration of open sites favorable for the post-modification of CPPs presents a unique opportunity for the rational design of inorganic materials with target-oriented functions. Herein, we report a shape-controllable synthetic protocol for zinc-based coordination polymer nanocubes (Zn-CPNs). In the synthesis, 2,6-bis[(4-carboxyanilino)carbonyl] pyridine ([N3]) ligand is employed as an efficient shape-directing modulator to control the size and shape of Zn-CPNs. More importantly, the [N3] ligand provides metal binding sites suitable for the decoration of other functional metals such as copper ions. The copper-modified Zn-CPNs (Cu_Zn-CPNs) show good activities in a heterogeneous catalytic reaction.

关键词： zinc-based coordination polymer nanocubes shape-directing modulator size and shape controls post-modification heterogeneous catalytic reaction

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Metadynamics sampling in atomic environment space for collecting training data for machine learning potentials

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npj Computational Materials 2021年第1期7卷 1171-1179页

作者： Dongsun yoo Jisu Jung Wonseok Jeong Seungwu Han Department of Materials Science and Engineering and Research Institute of Advanced Materials Seoul National UniversitySeoulKorea Samsung Display Co. Ltd.1Samsung-roGiheung-guYongin-siGyeonggi-doKorea

The universal mathematical form of machine-learning potentials(MLPs)shifts the core of development of interatomic potentials to collecting proper training ***,the training set should encompass diverse local atomic environments but conventional approaches are prone to sampling similar configurations repeatedly,mainly due to the Boltzmann *** such,practitioners handpick a large pool of distinct configurations manually,stretching the development period *** overcome this hurdle,methods are being proposed that automatically generate training ***,we suggest a sampling method optimized for gathering diverse yet relevant configurations *** is achieved by applying the metadynamics with the descriptor for the local atomic environment as a collective *** a result,the simulation is automatically steered toward unvisited local environment space such that each atom experiences diverse chemical environments without *** apply the proposed metadynamics sampling to H:Pt(111),GeTe,and Si *** these examples,a small number of metadynamics trajectories can provide reference structures necessary for training high-fidelity *** proposing a semiautomatic sampling method tuned for MLPs,the present work paves the way to wider applications of MLPs to many challenging applications.

关键词： dynamics collective stretching

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Stick-and-play system based on interfacial adhesion control enhanced by micro/nanostructures

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Nano Research 2021年第9期14卷 3143-3158页

作者： Jung II yoo Seung Hyun Kim Heung Cho Ko School of Materials Science and Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea

The evolution of membrane-type electronics has facilitated the development of stick-and-play systems,which confer diverse electrical functions to various planar or arbitrary curvilinear *** stick-and-play concept is based on the development of thin electronic devices in a printable format and their subsequent transfer to target *** development of this technology requires control of the interfacial adhesion of the electronic prints for retrieval from a carrier and transfer to the target ***,we discuss the transfer printing for membrane-type electronics,starting from an overview of materials available for flexible substrates,transfer printing of electronic prints for retrieval,and assembly for further ***,we explain the stick-and-play concept based on fabricated membrane-type electronics;"stick" and “play"refer to the transfer of electronic devices and the performance of their electronic functions,*** particular,we broadly survey various methods based on micro/nanostructures,including gecko-inspired,interlocking,cephalopod-sucker-inspired,and cilia structures,which can be employed to stick-and-play systems for enhancing interfacial adhesion with complex target surfaces under dynamic and wet ***,we highlight the stick-and-play system application of micro/nanostructures for skin-attachable biomedical electronics,e-textiles,and environmental monitoring electronics.

关键词： transfer printing interfacial adhesion flexible electronics stick-and-play system bioinspired adhesive

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Intestinal enteroids/organoids: A novel platform for drug discovery in inflammatory bowel diseases

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World Journal of Gastroenterology 2019年第30期25卷 4125-4147页

作者： Jun-Hwan yoo Mark Donowitz Department of Medicine Division of Gastroenterology and HepatologyJohns Hopkins University School of MedicineBaltimoreMD 21205United States Digestive Disease Center CHA Bundang Medical CenterCHA UniversitySeongnam 13496South Korea

The introduction of biologics such as anti-tumor necrosis factor(TNF)monoclonal antibodies followed by anti-integrins has dramatically changed the therapeutic paradigm of inflammatory bowel diseases(IBD).Furthermore,a newly developed anti-p40 subunit of interleukin(IL)-12 and IL-23(ustekinumab)has been recently approved in the United States for patients with moderate to severe Crohn’s disease who have failed treatment with ***,these immunosuppressive therapeutics which focus on anti-inflammatory mechanisms or immune cells still fail to achieve long-term remission in a significant percentage of *** strongly underlines the need to identify novel treatment targets beyond immune suppression to treat *** studies have revealed the critical role of intestinal epithelial cells(IECs)in the pathogenesis of ***,biochemical and immunologic driven barrier dysfunctions of epithelial cells contribute to the development of *** addition,the recent establishment of adult stem cell-derived intestinal enteroid/organoid culture technology has allowed an exciting opportunity to study human IECs comprising all normal epithelial *** long-term epithelial culture model can be generated from endoscopic biopsies or surgical resections and recapitulates the tissue of origin,representing a promising platform for novel drug discovery in *** review describes the advantages of intestinal enteroids/organoids as a research tool for intestinal diseases,introduces studies with these models in IBD,and gives a description of the current status of therapeutic approaches in ***,we provide an overview of the current endeavors to identify a novel drug target for IBD therapy based on studies with human enteroids/organoids and describe the challenges in using enteroids/organoids as an IBD model.

关键词： Enteroids Organoids Inflammatory bowel diseases Crohn’s disease Ulcerative colitis

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Deep Learning-Based Action Classification Using One-Shot Object Detection

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Computers, Materials & Continua 2023年第8期76卷 1343-1359页

作者： Hyun yoo Seo-El Lee Kyungyong Chung Contents Convergence Software Research Institute Kyonggi UniversitySuwon-si16227Korea Department of Public Safety Bigdata Kyonggi UniversitySuwon-si16227Korea Division of Computer Science and Engineering Kyonggi UniversitySuwon-si16227Korea

Deep learning-based action classification technology has been applied to various fields,such as social safety,medical services,and *** an action on a practical level requires tracking multiple human bodies in an image in real-time and simultaneously classifying their *** are various related studies on the real-time classification of actions in an ***,existing deep learning-based action classification models have prolonged response speeds,so there is a limit to real-time *** addition,it has low accuracy of action of each object ifmultiple objects appear in the ***,it needs to be improved since it has a memory overhead in processing image *** learning-based action classification using one-shot object detection is proposed to overcome the limitations of multiframe-based analysis *** proposed method uses a one-shot object detection model and a multi-object tracking algorithm to detect and track multiple objects in the ***,a deep learning-based pattern classification model is used to classify the body action of the object in the image by reducing the data for each object to an action *** to the existing studies,the constructed model shows higher accuracy of 74.95%,and in terms of speed,it offered better performance than the current studies at 0.234 s per *** proposed model makes it possible to classify some actions only through action vector learning without additional image learning because of the vector learning feature of the posterior neural ***,it is expected to contribute significantly to commercializing realistic streaming data analysis technologies,such as CCTV.

关键词： Human action classification artificial intelligence deep neural network pattern analysis video analysis

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Direct synthesis of highly conductive poly（3,4- ethylenedioxythiophene）：poly（4-styrenesulfonate）（PEDOT：PSS）/graphene composites and their applications in energy harvesting systems

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Nano Research 2014年第5期7卷 717-730页

作者： Dohyuk yoo Jeonghun Kim Jung Hyun Kim Department of Chemical and Biomolecular Engineering Yonsei University 50 Yonsei-ro Seodaemun-gu Seou1120-749 Republic of Korea Electronic Materials Division R&D Center Dongjin Semichem Co. Ltd. 625-3 Yodang-Ri Yanggam-Myeon Hwaseong-Gun Gyeonggi-Do Republic of Korea

We report for the first time highly conductive poly（3,4-ethylenedioxythiophene）： poly（4-styrenesulfonate）（PEDOT：PSS）/graphene composites fabricated by in situ polymerization and their applications in a thermoelectric device and a platinum （Pt）-free dye-sensitized solar cell （DSSC） as energy harvesting systems. Graphene was dispersed in a solution of poly（4-styrenesulfonate）（PSS） and polymerization was directly carried out by addition of 3,4-ethylenedioxythiophene （EDOT） monomer to the dispersion. The content of the graphene was varied and optimized to give the highest electrical conductivity. The composite solution was ready to use without any reduction process because reduced graphene oxide was used. The fabricated film had a conductivity of 637 ***-1, corresponding to an enhancement of 41%, after the introduction of 3 wt.% graphene without any further complicated reduction processes of graphene being required. The highly conductive composite films were employed in an organic thermoelectric device, and the device showed a power factor of 45.7 μW·m^-1K^-2 which is 93% higher than a device based on pristine PEDOT：PSS. In addition, the highly conductive composite films were used in Pt-free DSSCs, showing an energy conversion efficiency of 5.4%, which is 21% higher than that of a DSSC based on PEDOT：PSS.

关键词： direct synthesis conductive polymer graphene composite thermoelectric material dye-sensitized solar cell

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