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Varicella-zoster virus meningitis after spinal anesthesia:A case report

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World Journal of Clinical Cases 2022年第25期10卷 9127-9131页

作者： Ye-Won Lee Byunghoon Yoo Yun Hee lim Department of Anesthesiology and Pain Medicine College of MedicineInje UniversitySanggye Paik HospitalSeoul 01757South Korea

BACKGROUND Headache is a common complication of regional *** treatment of post spinal anesthesia headache varies depending on the *** meningitis is rare,it can cause significant harm to the *** dural puncture headache and septic meningitis are the most commonly suspected causes of post spinal anesthesia headache;however,other causes should also be *** SUMMARY A 69-year-old woman was scheduled for varicose vein stripping surgery under spinal *** procedure was performed aseptically,and surgery was completed without any *** 4 d,the patient visited the emergency room with complaints of headache,nausea,and *** examination revealed that the patient was *** the history of spinal anesthesia,post dural puncture headache and septic meningitis was initially suspected,and the patient was treated with empirical ***,varicella-zoster virus PCR test result was positive,and all other test results were *** patient was diagnosed with meningitis caused by varicella-zoster virus and was treated with acyclovir for 5 *** headache improved,and the patient was discharged without any *** Viral meningitis due to virus reactivation may cause headache after regional ***,clinicians should consider multiple etiologies of headache.

关键词： Aseptic meningitis Headache Regional anesthesia Spinal anesthesia Varicella zoster virus infection Case report

Engineering Geometric Electrodes for Electric Field-Enhanced High-Performance Flexible In-Plane Micro-Supercapacitors

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Energy & Environmental Materials 2023年第4期6卷 114-120页

作者： Jihong Kim Sung Min Wi Jong-Guk Ahn Sangjun Son Hee Young lim Yeonsu Park Hye Ji Eun Jong Bae Park Hyunseob lim Sangyeon Pak A-Rang Jang Young-Woo Lee Department of Energy Engineering Soonchunhyang UniversityAsan 31538Korea Department of Chemistry Gwangju Institute of Science and TechnologyGwangju 61005Korea Jeonju Centre Korea Basic Science InstituteJeonju 54907Korea Prof.S.Pak School of Electronic and Electrical Engineering Hongik UniversitySeoul 04066Korea Division of Electrical Electronic and Control EngineeringKongju National UniversityCheonan 31080Korea

In plane micro-supercapacitors that are miniaturized energy storage components have attracted significant attention due to their high power densities for various ubiquitous and sustainable device systems as well as their facile integration on various flexible/wearable *** implement the micro-supercapacitors in various practical applications that can accompany solid state or gel electrolyte and flexible substrates,ions must be readily transported to electrodes for achieving high power ***,we show large enhancement in electrochemical properties of flexible,inplane micro-supercapacitor using sharp-edged interdigitated electrode design,which was simply fabricated through direct laser scribing *** sharp-edged electrodes allowed strong electric field to be induced at the corners of the electrode fingers which led to the greater accumulation of ions near the surface of electrode,significantly enhancing the energy storage performance of *** electric field-enhanced in-plane micro-supercapacitor showed the volumetric energy density of 1.52 Wh L^(−1)and the excellent cyclability with capacitive retention of 95.4%after 20000 *** further showed various practicability of our sharp-edged design in micro-supercapacitors by showing circuit applicability,mechanical stability,and air *** results present an important pathway for designing electrodes in various energy storage devices.

关键词： electric field enhancement flexible energy storage device microsupercapacitors sharp electrodes

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Machine learning based fault detection and state of health estimation of proton exchange membrane fuel cells

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能源与人工智能(英文) 2023年第2期12卷 178-186页

作者： Vijay Mohan Nagulapati SShiva Kumar Vimalesh Annadurai Hankwon lim School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology50 UNIST-gilEonyang-eupUlju-gunUlsan44919Republic of Korea Carbon Neutrality Demonstration and Research Center Ulsan National Institute of Science and Technology50 UNIST-gilEonyang-eupUlju-gunUlsan44919Republic of Korea Department of Mechatronics Rajalakshmi Engineering CollegeChennaiTamilnaduIndia Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology50 UNIST-gilEonyang-eupUlju-gunUlsan44919Republic of Korea

In fuel cells, chemical energy is directly converted into heat and electricity without any emissions which makes them an attractive substitute for various energy needs. Fuel cells have high energy conversion ratio and highpower densities which make them suitable for automotive applications. However, these fuel cell systems suffer with low reliability and durability as system components develop faults during operation resulting in degradation and diminished system performance. In this context, fault detection and fault mitigation strategies are being extensively developed. Diagnostic approaches like electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic analysis offer a truthful representation of the State of Health (SOH) of the fuel cell. However, these approaches are intrusive and require pausing the operation of the fuel cell effecting its integrity. Machine learning based fault detection and SOH estimation is a non-intrusive approach where a mapping function is established between the indicators and SOH. The SOH of a fuel cell can be correlated to the patterns in sensor signals or indicators. Indicators that influence SOH are cell voltages, current density distribution, impedance spectra, acoustic emission and magnetic fields. Developing an accurate fault detection and state estimation technique through data driven machine learning approaches will allow corrective measures to avoid irreversible faults and improve the reliability and durability of fuel cells.

关键词： PEM fuel cell Data driven prognostics Fault detection Dynamic load test Gaussian process regression Support vector machine Artificial neural networks

Transparent Access to Heterogeneous IoT Based on Virtual Resources

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Computers, Materials & Continua 2023年第3期74卷 4983-4999页

作者： Wenquan Jin Sunhwan lim Young-Ho Suh Chanwon Park Dohyeun Kim Big Data Research Center Jeju National UniversityJeju63243Korea Autonomous IoT Research Section Intelligent Convergence Research LaboratoryElectronics and Telecommunications Research InstituteDaejeon34129Korea Department of Computer Engineering Jeju National UniversityJeju63243Korea

The Internet of Things(IoT)inspires industries to deploy a massive number of connected devices to provide smart and ubiquitous services to influence our daily *** computing leverages sufficient computation and storage at the edge of the network to enable deploying complex functions closer to the environment using Internet-connected *** to the purpose of the environment including privacy level,domain functionality,network scale and service quality,various environment-specific services can be provided through heterogeneous applications with sensors and actuators based on edge ***,for providing user-friendly service scenarios based on the transparent access to heterogeneous devices in edge computing,a consistent interface shall be provided to deliver services from edge computing to *** this paper,we propose transparent computing based on virtual resources to access heterogeneous IoT devices without considering the underlying network configuration at the edge of the *** supporting transparent access to different edge computing environments through a consistent interface,the virtual resource of edge gateway is proposed to bridge the Internet and devices which are deployed on the edge of the *** proposed edge gateway exposes the services of the Internet of Things devices to the Internet using virtual resources that represent the resources of physical *** virtual resources provide a consistent interface to enable clients to access devices in edge computing without considering underlying *** virtual resource is generated by the resource directory in the edge gateway through the registration of a *** on the device registration,the device information is stored in the gateway to link virtual resources and devices for translating messages according to the destination protocols and identifying physical devices that are represented by virtual ***,through collaboration with the serv

关键词： Internet of things edge computing edge gateway transparent computing virtualization resource directory virtual resource

Spontaneous rupture of ocular surface squamous neoplasia–a case report

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International Journal of Ophthalmology(English edition) 2022年第2期15卷 357-359页

作者： Jun Hyuk Son Su-Ho lim Department of Ophthalmology Yeungnam University College of MedicineDaegu 42415Republic of Korea Department of Ophthalmology Daegu Veterans Health Service Medical CenterDaegu 42835Republic of Korea

Dear Editor,Ocular surface squamous neoplasia(OSSN)typically occurs adjacent to limbus or in inter-palpebral fissures,over a preexisting pinguecula[1].The term OSSN includes mild dysplasia at one end of its disease spectrum and invasive squamous cell carcinoma at the other and is the most common non-pigmented malignancy of the ocular surface[2,3].

关键词： ocular squamous rupture

Primary central nervous system lymphoma presenting as a single choroidal lesion mimicking metastasis:A case report

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World Journal of Clinical Cases 2022年第4期10卷 1291-1295页

作者： Hee Ryeong Jang Kyu-Hyoung lim Kyungyul Lee Department of Internal Medicine Kangwon National University HospitalKangwon National University School of MedicineChuncheon 24289South Korea Department of Pathology Kangwon National University HospitalKangwon National University School of MedicineChuncheon 24289South Korea

BACKGROUND Primary choroidal lymphoma is usually an indolent B-cell lymphoma and rarely progresses to extraocular ***,we report a case of primary choroidal lymphoma diagnosed as diffuse large B-cell lymphoma(DLBL),which progressed to the brain parenchyma after 4 *** SUMMARY A 78-year-old man presented with diminution of vision in his right eye.A choroidal lesion suspected of metastatic lesion was observed in the right eye by ophthalmologic *** discover the primary tumor,imaging investigations were performed but no malignant lesion was *** 4 mo,the patient returned to the clinic presenting with neurological *** magnetic resonance imaging revealed an abnormal contrast-enhancing mass in the left cerebellum.A stereotactic biopsy was performed,and DLBL was *** patient received the high dose methotrexate-based chemotherapy and he achieved complete *** Primary choroidal lymphoma is usually known to have a benign clinical course without systemic *** present a rare case of primary choroidal lymphoma diagnosed as DLBL that progressed to the brain parenchyma within months.

关键词： Primary choroidal lymphoma Diffuse large B-cell lymphoma Primary central nervous system lymphoma Case report

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钒钛铁尾矿制备绿色建筑材料的研究进展

材料导报 2024年

作者：田小平王长龙 Hidayati Asrah lim Chung Han 平浩岩齐洋马锦涛荆牮霖刘治兵郑永超翟玉新刘枫河北工程大学土木工程学院 Faculty of Engineering University Malaysia Sabah 固废资源化利用与节能建材国家重点实验室北京建筑材料科学研究总院有限公司中铁建设集团有限公司中铁建设集团建筑发展有限公司

钒钛磁铁矿是以铁、钒、钛为主的多金属元素共生的复合矿，在世界分布不均衡。中国是该矿石的主要产出国之一，分布在5个主要矿带。钒钛铁尾矿是钒钛磁铁矿选矿过程中产生的固体工业废弃物，是一种多金属伴生的铁尾矿。该尾矿在中国的... 详细信息

钒钛磁铁矿是以铁、钒、钛为主的多金属元素共生的复合矿，在世界分布不均衡。中国是该矿石的主要产出国之一，分布在5个主要矿带。钒钛铁尾矿是钒钛磁铁矿选矿过程中产生的固体工业废弃物，是一种多金属伴生的铁尾矿。该尾矿在中国的堆存量巨大，富含很多有用化学组分，也被称为人工矿床。该尾矿以硅酸盐为主，主要化学成分是二氧化硅、三氧化二铝、氧化钙和氧化铁等，主要矿物是脉石矿物。国内外学者对其在绿色建筑材料综合利用方面做了很多有益探索，但总体来看，这些研究更多停留在实验室里。主要原因是①不同尾矿库甚至同一尾矿库的钒钛铁尾矿理化性能可能有较大差异，尾矿原料的稳定性不足；②受尾矿原料不稳定的理化性能影响，中试结果经常出现较大差异，难以实现规模化利用；③钒钛铁尾矿库大多地处偏僻，运输成本高企，且缺乏高附加值的尾矿产品，规模以上企业因投入大产出小望而生畏。本文综述了钒钛铁尾矿在中国的地域分布和堆存量，重点研究了其化学组成、矿物组成、粒度分布和重金属浸出，分析了作为主要原料在绿色建筑材料方面的研究进展，指出了存在问题并展望了发展前景。

关键词：钒钛磁铁矿钒钛铁尾矿绿色建筑材料混凝土矿物掺合料

Progress of polymer reaction engineering:From process engineering to product engineering

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Chinese Journal of Chemical Engineering 2022年第10期50卷 3-11页

作者： Pingwei Liu Jigang Du Yuting Ma Qingyue Wang Khak Ho lim Bo-Geng Li State Key Laboratory of Chemical Engineering College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Institute of Zhejiang University-Quzhou Quzhou 324000China

Polymer reaction engineering studies the design,operation,and optimization of reactors for industrial scale polymerization,based on the theory of polymerization kinetics and transfer processes(e.g.,flow,heat and mass transfer).Although the foundation and development of this discipline are less than80 years,the global production of polymers has exceeded 400 million tons per *** demonstrates that polymer reaction engineering is of vital importance to the polymer *** with the matu rity of production processes and market saturation for bulk polymers,emerging industries such as information technology,modern transportation,biomedicine,and new energy have continued to *** a result,the research objective for polymer reaction engineering has gradually shifted from maximizing the efficiency of the polymerization process to the precise regulation of high-end product-oriented macro molecules and their aggregation structures,i.e.,from polymer process engineering to polymer product *** this review,the frontiers of polymer reaction engineering are introduced,including the precise regulation of polymer chain structure,the control of primary aggregation structure,and the rational design of polymer *** narrow down the topic to the polymerization reaction engineering of vinyl ***,the future prospects are provided for the field of polymer reaction engineering.

关键词： Controlled polymerization Polymer chainstructure Primary aggregationstructure Rational design Numerical controlmanufacturing

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影响中国消费者体育商品购买意愿的因素及变化

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体育科学研究 2024年第1期28卷 35-46页

作者：杨宏伟刘一瑾林忠煇首尔国立大学体育教育系韩国首尔08826

为了探析影响我国消费者体育商品购买意愿的因素及各因素在新冠疫情爆发后的变化,运用文献资料法、问卷调查法和数理统计法整理了各影响因素,合理划分了各因素范畴,并验证了各因素在新冠疫情前后的变化。文献资料调查结果显示有19个相... 详细信息

为了探析影响我国消费者体育商品购买意愿的因素及各因素在新冠疫情爆发后的变化,运用文献资料法、问卷调查法和数理统计法整理了各影响因素,合理划分了各因素范畴,并验证了各因素在新冠疫情前后的变化。文献资料调查结果显示有19个相关因素被列为影响我国体育消费者购买意愿的因素,并且这些因素可被合理地划分为内在因素、环境因素以及刺激因素。通过问卷调查法收集到了635名有效的消费者对相关因素的主观评价样本。通过结构方程模型对该样本进行了数理统计。统计结果显示内在因素、环境因素以及刺激因素共同构成了影响我国体育消费者消费意愿的三大因素,其中内在因素是影响我国体育消费者购买意愿的主要因素。不仅如此,研究还通过独立样本t检验,对各因素在新冠疫情爆发前后进行了对比。结果显示新冠疫情爆发后,各影响因素均有显著的积极变化。

关键词：大众体育消费消费动机因素购买意愿新冠疫情

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