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Tunnel flexibility effect on the ground surface acceleration response

Earthquake Engineering and Engineering Vibration 2016年第3期15卷 457-476页

作者： Mohammad Hassan Baziar asoud Rabeti Moghadam Yun Wook choo Dong-Soo Kim Center of Excellence for Fundamental Studies in Structural Engineering School of Civil EngineeringIran University of Science and TechnologyTehranIran School of Civil Engineering Iran University of Science and TechnologyTehran1ran Department of Civil and Environmental Engineering College of EngineeringKongju National UniversityChungnam 330-717Republic of Korea Department of Civil and Environmental Engineering Korea Advanced Institute of Science&TechnologyDaejeon 305-701Republic of Korea

Flexibility of underground structures relative to the surrounding medium, referred to as the flexibility ratio, is an important factor that influences their dynamic interaction. This study investigates the flexibility effect of a box-shaped subway tunnel, resting directly on bedrock, on the ground surface acceleration response using a numerical model verified against dynamic centrifuge test results. A comparison of the ground surface acceleration response for tunnel models with different flexibility ratios revealed that the tunnels with different flexibility ratios influence the acceleration response at the ground surface in different ways. Tunnels with lower flexibility ratios have higher acceleration responses at short periods, whereas tunnels with higher flexibility ratios have higher acceleration responses at longer periods. The effect of the flexibility ratio on ground surface acceleration is more prominent in the high range of frequencies. Furthermore, as the flexibility ratio of the tunnel system increases, the acceleration response moves away from the free field response and shifts towards the longer periods. Therefore, the flexibility ratio of the underground tunnels influences the peak ground acceleration （PGA） at the ground surface, and may need to be considered in the seismic zonation of urban areas.

关键词： box-shaped tunnel flexibility ratio acceleration response ground surface centrifuge modeling numericalsimulation

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Synthetic Spin-Orbit Coupling in Two-Level Cold Atoms

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Chinese Physics Letters 2013年第8期30卷 17-20页

作者： ZHANG Qi GONG Jiang-Bin OH choo-Hiap International Joint Research Laboratory for Quantum Functional Materials of Henan Province and School of Physics and Engineering Zhengzhou UniversityZhengzhou 450001 Centre of Quantum Technologies and Department of Physics National University of Singapore117543Singapore Department of Physics and Centre for Computational Science and Engineering National University of Singapore117542Singapore NUS Graduate School for Integrative Sciences and Engineering Singapore 117597Singapore Institute of Advanced Studies Nanyang Technological UniversitySingapore 639798Singapore

We theoretically and computationally show the simplest realization of SOC using two-level cold atoms interacting with only one laser *** underlying mechanism is based on the non-adiabatic nature of laser-atom interaction,with the Rabi frequency being not much larger than the kinetic energy of the *** use Zitterbewegung oscillation to further illustrate the effects of the synthesized SOC on the quantum dynamics of the two-level cold *** expect our proposal to be of experimental interest in the quantum simulation of SOC-related physics.

关键词： quantum realization oscillation

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Amputation stump management:A narrative review

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World Journal of Clinical Cases 2022年第13期10卷 3981-3988页

作者： Yoo Jin choo Du Hwan Kim Min Cheol Chang Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityDaegu 705-717South Korea Department of Physical Medicine and Rehabilitation College of MedicineChung-Ang UniversitySeoul 06973South Korea Department of Physical Medicine and Rehabilitation College of MedicineYeungnam UniversityTaegu 705-717South Korea

In this review intended for medical staff involved in patient rehabilitation,we provided an overview of the basic methods for managing amputation *** the amputation surgery,it is imperative to optimize the remaining physical abilities of the amputee through rehabilitation processes,including postoperative rehabilitation,desensitization,and continuous application of soft or rigid dressings for pain reduction and shaping of the *** on the situation,a prosthesis may be worn in the early stage of recovery or an immediate postoperative prosthesis may be applied to promote stump ***,to maintain the range of motion of the stump and to prevent deformation,the remaining portion of the limb should be positioned to prevent *** exercises should also be performed to improve muscle strength to ensure that the amputee is able to perform activities of daily living,***,clean wound or edema management of the stump is necessary to prevent problems associated with wearing the *** review is expected to contribute to the establishment of basic protocols that will be useful for stump management from the time of completion of amputation surgery to the fitting of a prosthesis to optimize patient recovery.

关键词： Amputation Amputee Management Rehabilitation Stump Review

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Risk prediction of hepatitis B virus-related hepatocellular carcinoma in the era of antiviral therapy

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World Journal of Gastroenterology 2013年第47期19卷 8867-8872页

作者： Il Han Song So Mi Kim Young Kwang choo Division of Hepatology Department of Internal MedicineDankook University College of MedicineCheonan 330-715South Korea Department of Internal Medicine Jeju National University School of MedicineJeju 690-767South Korea

Hepatocellular carcinoma(HCC)is a grave primary liver cancer that has a limited therapeutic option because it is generally diagnosed later in an advanced stage due to its aggressive biologic *** early detection of HCC has a great impact on the treatment efficacy and survival of patients at high risk for *** host,environmental,and virus-related risk factors have been *** B virus(HBV)is a major cause of end-stage liver diseases such as liver cirrhosis or HCC in endemic areas,and its serologic or virologic status is considered an important risk *** risk prediction derived from the identification of major risk factors is necessary for providing adequate screening/surveillance strategies to high-risk *** risk prediction models for HBV-related HCC have been presented recently with simple,efficient,and readily available to use parameters applicable to average-or unknown-risk populations as well as high-risk *** scoring systems of risk estimation to assess HCC development can provide the way to an evidence-based clinical approach for cost-and effort-effective outcomes,capable of inducing a personalized surveillance program according to risk *** this review,the concepts and perspectives of the risk prediction of HCC are discussed through the analysis of several risk prediction models of HBV-related HCC.

关键词： Hepatocellular carcinoma Hepatitis B virus Chronic hepatitis B Risk prediction Risk factors

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Survey on digital twins for Internet of Vehicles:Fundamentals,challenges,and opportunities

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Digital Communications and Networks 2024年第2期10卷 237-247页

作者： Jiajie Guo Muhammad Bilal Yuying Qiu Cheng Qian Xiaolong Xu Kim-Kwang Raymond choo School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China Department of Computer Engineering Hankuk University of Foreign StudiesGyeonggi-do17035South Korea Jiangsu Hydraulic Research Institute Nanjing210044China Department of Information Systems and Cyber Security University of Texas at San AntonioSan AntonioTX78249-0631USA

As autonomous vehicles and the other supporting infrastructures(e.g.,smart cities and intelligent transportation systems)become more commonplace,the Internet of Vehicles(IoV)is getting increasingly *** have been attempts to utilize Digital Twins(DTs)to facilitate the design,evaluation,and deployment of IoV-based systems,for example by supporting high-fidelity modeling,real-time monitoring,and advanced predictive ***,the literature review undertaken in this paper suggests that integrating DTs into IoV-based system design and deployment remains an understudied *** addition,this paper explains how DTs can benefit IoV system designers and implementers,as well as describes several challenges and opportunities for future researchers.

关键词： Internet of vehicles Digital twin Simulation Traffic systems

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沙尘暴事件中大气颗粒物化学组分的浓度变化和硫酸盐的形成

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环境科学研究 2005年第6期18卷 12-17页

作者：刘咸德董树屏李冰高占君李玉武 MOON kil-choo GHIM Young Sung 中国环境科学研究院北京100012 国家环境分析测试中心北京100029 国家地质实验测试中心北京100037 烟台环境监测中心站山东烟台264003 韩国科学技术研究院

应用电感耦合等离子体原子发射光谱、质谱和离子色谱分析了2002年3月28日—4月8日在山东长岛县采集的共11对粗、细大气颗粒物样品的化学组成,探讨4月6—8日沙尘暴事件中大气颗粒物化学组分的变化和硫酸盐的形成。沙尘暴事件应区分前锋... 详细信息

应用电感耦合等离子体原子发射光谱、质谱和离子色谱分析了2002年3月28日—4月8日在山东长岛县采集的共11对粗、细大气颗粒物样品的化学组成,探讨4月6—8日沙尘暴事件中大气颗粒物化学组分的变化和硫酸盐的形成。沙尘暴事件应区分前锋和后续部分,前锋与大气中各种污染物相互作用,具有硫富集的特征。后续部分较好地保持了长距离传输风沙尘本身的特征。硫酸盐的形成机理可能是多相氧化而不是简单的酸碱中和。硫酸铵是首先生成的含硫物种,这是细颗粒主导的形成过程。硫酸铵逐渐转化为其他硫酸盐,硫的成分也逐渐向粗颗粒转移。在沙尘暴事件中含硫污染物不但有一个从气相向颗粒物转变的过程,也有一个从细颗粒向粗颗粒转化的过程。

关键词：大气颗粒物沙尘暴事件硫酸盐形成

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ROAD+:Route Optimization with Additional Destination-Information and Its Mobility Management in Mobile Networks

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Journal of Computer Science & Technology 2010年第2期25卷 298-312页

作者： Moonseong Kim Matt W. Mutka Member, ACM Senior Member Jeonghoon Park Hyunseung choo Department of Computer Science and Engineering Michigan State University East Lansing MI 48824 U.S.A. Digital Media and Communication Business Samsung Electronics Korea School of Information and Communication Engineering Sungkyunkwan University 440-746 Korea

In the NEtwork MObility （NEMO） environment, mobile networks can form a nested structure. In nested mobile networks that use the NEMO Basic Support （NBS） protocol, pinball routing problems occur because packets are routed to all the home agents of the mobile routers using nested tunneling. In addition, the nodes in the same mobile networks can communicate with each other regardless of Internet connectivity. However, the nodes in some mobile networks that are based on NBS cannot communicate when the network is disconnected from the Internet. In this paper, we propose a route optimization scheme to solve these problems. We introduce a new IPv6 routing header named ＂destination-information header＂（DH）, which uses DH instead of routing header type 2 to optimize the route in the nested mobile network. The proposed scheme shows at least 30% better performance than ROTIO and similar performance improvement as DBU in inter-route optimization. With respect to intra-route optimization, the proposed scheme always uses the optimal routing path. In addition, the handover mechanism in ROAD＋ outperforms existing schemes and is less sensitive to network size than other existing schemes.

关键词： NEtwork MObility (NEMO) route optimization (RO) NEMO basic support (NBS) pinball routing problem mobile network nested mobile network

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Perfect forward secure identity-based authenticated key agreement protocol in the escrow mode

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Science in China(Series F) 2009年第8期52卷 1358-1370页

作者： WANG ShengBao CAO ZhenFu CHENG ZhaoHui choo Kim-Kwang Raymond Department of Computer Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China Computing Center Artillery Academy of PLA Hefei 230031 China Independent Consultant Room 1415 International Chamber of Commerce Building A Shenzhen 518048 China Australian Institute of Criminology GPO Box 2944 Canberra ACT 2601 Australia ARC Centre of Excellence in Policing and Security Regulatory Institutions Network Australian National University Australia

The majority of existing escrowable identity-based key agreement protocols only provide partial forward secrecy. Such protocols are, arguably, not suitable for many real-word applications, as the latter tends to require a stronger sense of forward secrecy--perfect forward secrecy. In this paper, we propose an efficient perfect forward-secure identity-based key agreement protocol in the escrow mode. We prove the security of our protocol in the random oracle model, assuming the intractability of the Gap Bilinear Diffie-Hellman （GBDH） problem.

关键词： authenticated key agreement perfect forward secrecy bilinear pairing provable security modular security proof

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Sustainable food waste management using modified fuzzy improved analytic hierarchy process:a study of Malaysia

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Waste Disposal and Sustainable Energy 2024年第1期6卷 63-84页

作者： Chun Yuan choo Syariza Abdul-Rahman Abdul Malek Yaakob Emy E.A-Jalil Department of Decision Science School of Quantitative SciencesUniversiti Utara Malaysia06010SintokKedahMalaysia Institute of Strategic Industrial Decision Modeling School of Quantitative SciencesCollege of Arts and SciencesUniversiti Utara Malaysia06010SintokKedahMalaysia Technology and Supply Chain Excellence Institute School of Technology Management and LogisticsUniversiti Utara Malaysia06010SintokKedahMalaysia

Food waste generation is a pressing issue that requires urgent attention and concerted efforts *** staggering amount of food wasted each year not only wastes valuable resources but also exacerbates environmental,economic,and social *** Waste Management(FWM)consists of a complex array of criteria and sub-criteria,and treatments which seems *** is a need to evaluate the FWM with the help of important criteria and sub-criteria and treatments to address this *** this study,we identified four important criteria,21 sub-criteria,and four alternatives of FWM for the case of Malaysia using the integrated approach of literature review and expert ***,we employed the approach of Modified Fuzzy Improved Analytical Hierarchy Process(IAHP)to corroborate the interrelationships among the identified criteria and sub-criteria,and their associated *** study undertakes linear normalization methods to transform data into comparable numerical values and the Geometric Mean method to handle uncertainty in human ***,the Centroid method is employed to convert fuzzy weights into crisp sets for ease of *** results indicate that environmental is the most essential criterion,followed by social,economic,and *** addition,air and water pollution is identified as the most critical *** Soldier Fly is discovered as the most sustainable FWM treatment,since it performs the best while meeting all the criteria and sub-criteria *** analysis demonstrates that the outputs from the proposed method are robust and *** finding suggests a proper and robust approach to help decision-makers select suitable FWM treatments to tackle various criteria and alternatives especially when handling inconsistent and uncertain judgments during evaluation.

关键词： Multi-criteria decision-making Sustainable food waste management Improved Analytical Hierarchy Process Fuzzy method Sensitivity analysis

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Real-time pupil tracking backlight system for holographic 3D display(Invited Paper)

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Chinese Optics Letters 2014年第6期12卷 12-15页

作者： Hyon-Gon choo Minsik Park Hyun-Eui Kim Chanyeol Bae byung Gyu Chae Hwi Kim Kyungae Moon Jinwoong Kim Joonku Hahn Electronics and Telecommunications Research Institute Taejon 305-700 Korea Korea University Sejong CampusSejong 339-700 Korea Kyungpook National University Daegu 702-701 Korea

We propose an automatic three-dimensionM （3D） pupil tracking backlight system for holographic 3D display system with large image size and full-parallax accommodation effect. The proposed tracking module is applied to a holographic 3D display system with two sets of directional holographic imaging module composed of 2 × 2 large scale lens array and 22-inch high-resolution liquid crystal display 3D panel. System architecture is described and experimental results are presented.

关键词： Invited Paper Real-time pupil tracking backlight system for holographic 3D display SLM time

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