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Journal of Energy Chemistry 2024年第6期93卷 352-360,I0009页

作者： Donghyun Yoon Sunki Chung Minjun choi Eunhyeok Yang jaeyoung Lee School of Earth Sciences and Environmental Engineering Gwangju Institute of Science and Technology(GIST)Gwangju 61005Republic of Korea International Future Research Center of Chemical Energy Storage and Conversion Processes GISTGwangju 61005Republic of Korea Ertl Center for Electrochemistry and Catalysis GISTGwangju 61005Republic of Korea TKG Huchems Co.Ltd 963Sangam-roYeosu-siJeollanam-do 59614Republic of Korea

Ammonia allows storage and transport of hydrogen over long distances and is an attractive potential hydrogen *** decomposition has recently been used for the conversion of ammonia to hydrogen and is regarded as a future technology for production of CO_(2)-free pure ***,a heterostructural Pt-Ir dual-layer electrode is developed and shown to achieve successful long-term operation in an ammonia electrolyzer with an anion exchange membrane(AEM).This electrolyzer consisted of eight membra ne electrode assemblies(MEAs)with a total geometric area of 200 cm~2 on the anode side,which resulted in a hydrogen production rate of 25 L h~(-1).We observed the degradation in MEA performance attributed to changes in the anode catalyst layer during hydrogen production via ammonia ***,we demonstrated the relationship between the ammonia oxidation reaction(AOR)and the oxygen evolution reaction(OER).

关键词： Ammonia oxidation Dual-layer catalyst Green hydrogen Electrolytic process Oxygen evolution reaction

A CAWL handler for context-aware composite workflow services

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Journal of Measurement Science and Instrumentation 2013年第4期4卷 370-375页

作者： Yongseong Cho Jongsun choi jaeyoung choi School of Computer Science and Engineering Soongsil University

In distributed computing environment,workflow technologies have been continuously ***,there is an attempt to apply these technologies to context-aware services in ubiquitous computing *** middleware,which offers services in such environments,should support the automation services suited for the user using various types of situational information around the *** this paper,based on context-aware workflow language(CAWL),we propose a CAWL based composite workflow handler for supporting composite workflow services,which can integrate more than two service flows and handle *** test results shows that the proposed CAWL handler can provide the user with the composite workflow services to cope with various demands on a basis of a scenario document founded on CAWL.

关键词： ubiquitous computing context-aware composite workflow context-aware workflow language (CAWL) handlerDocument code:AArticle ID:1674-8042(2013)04-0370-06

Automatic generation of context-aware workflow documents for ubiquitous robot services

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Journal of Measurement Science and Instrumentation 2012年第3期3卷 260-267页

作者： Yongseong Cho Jongsun choi jaeyoung choi School of Computer Science and Engineering Soongsil University

Intelligent robots in ubiquitous computing environment should be able to receive a variety of surrounding informa tion and provide users with appropriate services. A developer can describe the robot services that are proper to users＇ envir onments by using his or her various environments, and process them through the execution engine. However, it is difficult for a developer to describe and develop robot services, who knows all surrounding information which is called context infor mation. If there is a method for describing and documenting robot services in intuitive expressions, that is to use graphical user interfaces（GUls）, it would be very helpful. This paper suggests that robot service developers describe robot services us ing intuitive GUls with contextawareness. And the services can be automatically generated into workflow documents. Robot services that robot service developers have made with intuitive GUIs can be automatically generated into workflow docu ments by using the object modeling technique（OMT）. Developers can describe robot services based on contextaware work flow language（CAWL ）. For testing, scenariobased robot services are described using CAWLbased development tool, and their workflow documents are automatically generated.

关键词： ubiquitous robot service automatic generation context-aware workflow document(CAWL)

Design and Implementation of a BPEL Profiling System by Aspect-oriented Programming

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Journal of Measurement Science and Instrumentation 2011年第2期2卷 174-178页

作者： Donggyu KWAK jaeyoung choi School of Computing Soongsil UniversitySeoul 156-743Korea

Business Process Exeention Language （BPEL） is being used in various applications as the standard of workflow. As the requirerments increase to describe application processes in BPEL, BPEL documentt is getting more Complplicated. Therefore it is difficult to describe applications in BPEL with high reliability. In order to write highly reliable BPEL document, it is necessary to check if the document is working correctly in accordance with user＇s intention. But it is difficult to carry out the test since BPEL engine doesn＇t provide a profiling function. In this paper, we suggest a BPEL system with a real-time profiling function. The suggested system consists of an integrated development environment and a BPEL nunning environment. BPEL integrated development environment has a BPEL to Java（B2J） engine, which generates and executes a Java workflow program from a BPEL document, and a converter, which converts Java Weaving XML （JWX） documents to Aspect-oriented programs. The new functions are described in JWX, which is Extensive Markup Lan-guage （XML）-based document. Since aspect-oriented programming technique provides the way to modularize main and supplemental requirements, it guarantees the low degree of coupling between BPEL workflow program and new functions by weaving them. Our approach can be extended to add other functions to provide context-aware services.

关键词： Aspect-Oiented Programming (AOP) BPEL components profiling adding function

Context-aware BPEL workflow system using aspect-oriented programming

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Journal of Measurement Science and Instrumentation 2012年第2期3卷 119-122页

作者： Minsuk Kim Donggyu Kuak Jongsun choi jaeyoung choi Computer Science and Engineering Soongsil University

Business process execution language(BPEL)is a most recognized standard workflow ***,it is difficult to be used in the ubiquitous system computing environment because it is difficult to describe the context information in the selection of the flow through the *** solve this problem,we propose a new BPEL workflow system with context-awareness by using aspect-oriented programming(AOP).This system is composed of a BPEL system module and a weaving module using AOP for *** BPEL system module generates a BPEL workflow *** the weaving module converts a context-aware mark-up language(CAML)document to the aspect-oriented program that is applied to context-aware code without modification of the existing BPEL *** also define a new document form that is called CAML,which provides a context-aware that is not available in *** system can generate a context-aware workflow *** is developed in a way that inserts context information using AOP to provide context-aware services.

关键词： aspect-oriented programming(AOP) business process execution language(BPEL) context-aware workflow

Integrated management system of agro-fishery products based on QR-code

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Journal of Measurement Science and Instrumentation 2013年第3期4卷 252-255页

作者： Namjin Bae Yongyun Cho Jongsun choi jaeyoung choi Deptartment of Information and Communication Engineering Sunchon National University School of Computer Science and Engineering Soongsil University

Recently,both the importance and awareness relating to food safety relating to agrochemicals,chemical fertilizers,the pollution of ecosystem and unwholesome foods are growing *** the same reason,the purchaser's curiosity increases to know about the production process which can be accomplished by production traceability *** traceability system can store and superintend the specific attribute information about products regarding the productive centre,producer and production finish *** products undergo various circulation processes and they are being managed by individually constructed traceability ***,it is difficult for the producer and the consumer to guarantee the safety from transpirable issues about the falsification of production traceability because the traceability information can be re-produced by forging through various *** in this paper,we proposed a system for integrated management of agro-fishery products based on quick response code(QR-code)for forgery prevention which may help to solve these *** proposed system makes QR-code using production information provided by *** then it is provided to the distributor and the consumer through integrated service model using the ***,this system make sure to provide the same production traceability about the products to the distributor and the consumer and always keeps both updated with the same information.

关键词： quick response code (QR-code) production traceability traceability systemCLC number:TP391.44 Document code:AArticle ID:1674-8042(2013)03-0252-04

Towards delivery of situational information in distributed environments

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Journal of Measurement Science and Instrumentation 2013年第3期4卷 282-285页

作者：孙成强 Yongseong Cho Jongsun choi jaeyoung choi School of Computer Science and Engineering Soongsil University

In the distributed environment,robots should be able to provide users with adaptive services automatically according to the situational information changing dynamically which is obtained from both users and their *** workflow depends on situational information obtained from physical environments and provides context-aware services automatically based on the information *** the workflow in the business processes and the distributed computing environments have supported the automation of services by connecting *** workflow needs to specify ubiquitous situational information as state-transition ***,the delivery and use of sensor data in the workflow is a difficult problem for the robot *** order to bridge the gap between applications and low-level constructs and to acquire raw situational information for the execution of the context-aware workflow in the robot systems,this paper presents an approach which can achieve the sensor data transmission between a sensing server and a robot system easily.

关键词： publish/subscribe robot service workflow situational information distributed environmentsCLC number:TN919.72 Document code:AArticle ID:1674-8042(2013)03-0282-04

Development of vehicle-recognition method on water surfaces using LiDAR data:SPD^(2)(spherically stratified point projection with diameter and distance)

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Defence Technology（防务技术） 2024年第6期36卷 95-104页

作者： Eon-ho Lee Hyeon Jun Jeon Jinwoo choi Hyun-Taek choi Sejin Lee The Department of Mechanical Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea Ocean System Engineering Research Division Korea Research Institute of Ships and Ocean Engineering(KRISO)Daejeon 34103Republic of Korea The Division of Mechanical&Automotive Engineering Kongju National University1223-24 Cheonan-daeroCheonan 31080Republic of Korea

Swarm robot systems are an important application of autonomous unmanned surface vehicles on water *** monitoring natural environments and conducting security activities within a certain range using a surface vehicle,the swarm robot system is more efficient than the operation of a single object as the former can reduce cost and save *** is necessary to detect adjacent surface obstacles robustly to operate a cluster of unmanned surface *** this purpose,a LiDAR(light detection and ranging)sensor is used as it can simultaneously obtain 3D information for all directions,relatively robustly and accurately,irrespective of the surrounding environmental *** the GPS(global-positioning-system)error range exists,obtaining measurements of the surface-vessel position can still ensure stability during platoon *** this study,a three-layer convolutional neural network is applied to classify types of surface *** aim of this approach is to redefine the sparse 3D point cloud data as 2D image data with a connotative meaning and subsequently utilize this transformed data for object classification ***,we have proposed a descriptor that converts the 3D point cloud data into 2D image *** use this descriptor effectively,it is necessary to perform a clustering operation that separates the point clouds for each *** developed voxel-based clustering for the point cloud ***,using the descriptor,3D point cloud data can be converted into a 2D feature image,and the converted 2D image is provided as an input value to the *** intend to verify the validity of the proposed 3D point cloud feature descriptor by using experimental data in the ***,we explore the feasibility of real-time object classification within this framework.

关键词： Object classification Clustering 3D point cloud data LiDAR(light detection and ranging) Surface vehicle

Synthetic brochosomes:Design,synthesis,and applications

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Nano Research 2024年第2期17卷 734-742页

作者： Lin Wang Jinsol choi Tak-Sing Wong Department of Mechanical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA Materials Research Institute The Pennsylvania State UniversityUniversity ParkPA 16802USA Department of Biomedical Engineering The Pennsylvania State UniversityUniversity ParkPA 16802USA

Brochosomes,which are nanoscopic buckyball-shaped granules produced by leafhoppers,are one of the most intricate structures discovered in *** functions of brochosomes have been proposed but only a few have been experimentally validated due to the challenge of fabricating their synthetic *** in micro-and nanofabrication have recently led to the emergence of synthetic brochosomes,opening up new possibilities for innovative *** review explores the early discovery of natural brochosomes and their geometrical features,followed by the recent progress in fabricating synthetic brochosomes and their *** on future applications and challenges in the scalable manufacturing of synthetic brochosomes are discussed.

关键词： synthetic brochosomes leafhopper antireflection superhydrophobicity surface-enhanced Raman scattering photocatalyst energy harvesting

Correlation between hydration properties and electrochemical performances on Ln cation size effect in layered perovskite for protonic ceramic fuel cells

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Journal of Energy Chemistry 2024年第1期88卷 1-9,I0001页

作者： Inhyeok Cho Jiwon Yun Boseok Seong Junseok Kim Sun Hee choi Ho-Il Ji Sihyuk choi Department of Mechanical Engineering Kumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Department of Aeronautics Mechanical and Electronic Convergence EngineeringKumoh National Institute of TechnologyGumi 39177GyeongbukRepublic of Korea Center for Energy Materials Research Korea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Center for Hydrogen and Fuel Cell Research Clean Technology Research DivisionKorea Institute of Science and Technology(KIST)Seoul 02792Republic of Korea Department of Energy and Environmental Engineering University of Science and TechnologySeoul 02792Republic of Korea Nanomaterials Science and Engineering Korea University of Science and Technology(UST)KIST CampusSeoul 02792Republic of Korea

PrBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(PrBSCF) has attracted much research interest as a potential triple ionic and electronic conductor(TIEC) electrode for protonic ceramic fuel cells(PCFCs). The chemical formula for Pr BSCF is AA'B_(2)O_(5+δ), with Pr(A-site) and Ba/Sr(A'-site) alternately stacked along the c-axis. Due to these structural features, the bulk oxygen ion diffusivity is significantly enhanced through the disorder-free channels in the PrO layer;thus, the A site cations(lanthanide ions) play a pivotal role in determining the overall electrochemical properties of layered perovskites. Consequently, previous research has predominantly focused on the electrical properties and oxygen bulk/surface kinetics of Ln cation effects,whereas the hydration properties for PCFC systems remain unidentified. Here, we thoroughly examined the proton uptake behavior and thermodynamic parameters for the hydration reaction to conclusively determine the changes in the electrochemical performances depending on LnBa_(0.5)Sr_(0.5)Co_(1.5)Fe_(0.5)O_(5+δ)(LnBSCF,Ln=Pr, Nd, and Gd) cathodes. At 500 ℃, the quantitative proton concentration of PrBSCF was 2.04 mol% and progressively decreased as the Ln cation size decreased. Similarly, the Gibbs free energy indicated that less energy was required for the formation of protonic defects in the order of Pr BSCF < Nd BSCF < Gd BSCF. To elucidate the close relationship between hydration properties and electrochemical performances in LnBSCF cathodes, PCFC single cell measurements and analysis of the distribution of relaxation time were further investigated.

关键词： Protonic ceramic fuel cell Cathode Triple ionic and electronic conductor Hydration property Proton uptake Gibbs free energy