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PHYSICAL PROPERTIES AND ENVIRONMENTAL PERFORMANCE OF STEAM-CURED CONCRETE CONTAINING FLUE-GAS DESULFURIZATION GYPSUM

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Journal of Green Building 2021年第1期16卷 3-15页

作者： hongseok Jang Seungyoung So Joenbuk National University Department of Architectural EngineeringKorea. Joenbuk National University Department of Architectural EngineeringResearch Center of Industrial TechnologyKorea

Flue-gas desulfurization(FGD)gypsum has occasionally been used as an additive to ***,appropriate facilities are required to ensure the environmen-tally safe processing of FGD gypsum and the resulting cement material *** facilities are yet to be developed because the amount of FGD gypsum used is still small when compared with the vast amounts of FGD gypsum *** this study,we analyze the effect of FGD gypsum addition on the physical properties,stabilization,and radon count of steam-cured mortar and compare its performance with air-cured *** results show that the steam-cured pozzolanic hydration products of ettringite and C-S-H promote the densification of the mortar structure,thereby resulting in nanopore size reduction and increased strength of FGD gypsum mortar subsequent to the steam-cured hydration ***,our environmental test results indicate that steam-cured pozzolanic materials composed of FGD gypsum are environmentally safer than air-cured cementitious materials.

关键词： FGD gypsum nanopores leaching toxicity recycled material

Characteristics of fever and response to antipyretic therapy in military personnel with adenovirus-positive community acquired pneumonia

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Military Medical Research 2020年第3期7卷 324-334页

作者： hongseok Yoo Jimi Oh Chul Park Division of Pulmonary and Critical Care Medicine Department of Internal MedicineSamsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea Department of Anesthesiology and Pain Medicine Asan Medical CenterUniversity of Ulsan College of MedicineSeoul 05505South Korea Division of Pulmonary Medicine Department of Internal MedicineWonkwang University HospitalIksan 54538South Korea

Background:In 2014,an outbreak of adenoviral pneumonia occurred in the Korean military training ***,there are limited data on the characteristics of the fever and its response to antipyretic therapy in immunocompetent adults with adenovirus-positive community-acquired pneumonia(CAP).Methods:The medical records of the patients who were admitted to the Armed Forces Chuncheon Hospital for the treatment of CAP between January 2014 and December 2016 were retrospectively *** patients were divided into three groups,namely,the adenovirus-positive(Adv)group,the adenovirus-negative(Non-Adv)group and the unknown pathogen group,according to the results of a polymerase chain reaction(PCR)test and sputum culture used to measure adenovirus and other bacteria or viruses in respiratory *** evaluated and compared the demographics,clinicolaboratory findings and radiological findings upon admission between the two ***:Out of the 251 military personnel with CAP during the study periods,67 were classified into the Adv group,while 134 were classified into the Non-Adv group and 50 were classified into the unknown pathogen *** patients in the Adv group had a longer duration of fever after admission((3.2±1.6)d vs.(1.9±1.2)d vs.(2.2±1.5)d,P=0.018)and symptom onset((5.8±2.2)d vs.(3.9±2.5)d vs.(3.7±2.0)d,P=0.006)than patients in the Non-Adv and unknown pathogen groups,*** patients in the Adv group had a higher mean temperature at admission(37.8±0.3 vs.37.3±0.3 vs.37.3±0.3,P=0.005),and more patients were observed over 40 and 39 to 40(14.9%vs.2.2%vs.4.0%,35.8%vs.3.7%vs.6.0%,P<0.001)than those in the Non-Adv and unknown pathogen groups,*** Adv group more commonly had no response or exhibited adverse events after antipyretic treatment compared to the Non-Adv group(17.9%vs.1.5%,35.0%vs.4.3%,P<0.001,P=0.05,respectively).In addition,the time from admission to overall clinical stabilization was significantly longer in the patients

关键词： Adenovirus Fever Response to antipyretic treatment

CHARACTERISTICS OF SLAG ACTIVATED PHC-PILE WITH REDUCED CEMENT CONTENT

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Journal of Green Building 2020年第4期15卷 117-129页

作者： hongseok Jang Seungyoung So Jeonbuk National University Department of Architectural EngineeringKorea Jeonbuk National University Department of Architectural EngineeringResearch Center of Industrial TechnologyKorea

Ground Granulated Blast-furnace Slag(GGBS)powders,the massive by-products produced in the process of manufacturing cast iron are actively used as a substitute for cement,one of the major causes of greenhouse gas *** purpose of this study was to investigate the proper mixing ratio of the activator,and to reduce the usage of cement in the production of high-strength steam cured concrete using *** cured products of various ratio were analyzed by XRD and TG/DTA,and the best ratio of the cured product were applied to the Pre-stressed high-strength con-crete(PHC)Pile,and the performance was then *** results showed that the fluidity was improved by mixing with GGBS,and when an appropriate amount of activator was used,it was possible to produce high-strength cured *** the PHC-Pile test,the replacement rate of 40%GGBS and combined 4%anhydrite gypsum and 2%Ca(OH)2 as an activator was *** compressive strength(2MPa more),shear strength(1.3MPa more),and Axial force strength(2.7Mpa more)were more improved than for the normal Portland cement PHC-Pile,and this GGBS pile can be manufactured more economically(the cost can be saved in the amount of 14.5%).This is caused by the activating agent destroying the glassy film of the GGBS,and actively inducing the pozzolanic reaction,so that the hydrate materi-als are generated,such as *** addition,by positively utilizing the inexpensive industrial by-product,GGBS,it is possible to manufacture environmentally friendly concrete products,while reducing the amount of cement used.

关键词： Earthen construction material By-products recycling PHC-Pile Substitution cement

Peripheral nerve regeneration monitoring using multilayer microchannel scaffolds

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Neural Regeneration Research 2016年第3期11卷 422-423页

作者： Yoonsu Choi hongseok(Moses)Noh Department of Electrical Engineering The University of Texas Rio Grande Valley Department of Mechanical Engineering and Mechanics Drexel University

Over 200,000 Americans have peripheral nerve injuries annually that result in a loss of function and a compromised quality of *** these,a significant percent involves unsuccessful repair of peripheral nerve gaps that ... 详细信息

关键词： multilayer regeneration repair collateral Americans annually traumatic axonal nerves proximal

EFFECT OF YELLOW LOESS ON ODOROUS GAS ADSORPTION AND ECOTOXICITY TEST USING DAPHNIA MAGNA

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Journal of Green Building 2021年第1期16卷 103-114页

作者： hongseok Jang Boram Lee Seungyoung So Jeonbuk National University Department of Architectural EngineeringKorea. Jeonbuk National University Department of Architectural EngineeringResearch Center of Industrial TechnologyKorea

To minimize damage caused by harmful substances released from artificial construc-tion materials,there has been increasing interest in eco-friendly houses constructed with natural *** natural materials,yellow loess is South Korea’s most representative eco-friendly construction material,with high purification performance for indoor ***,there has been no objective assessment of yellow loess’s performance at purifying indoor *** this study,internal pores were found in yellow loess that were of a lamellar crystal structure consisting of bonds of silica and alumina plates,and there was a high negative charge on the loess surface;these might have contributed to the excellent performance of yellow loess in adsorbing odorous *** was also an exposure test using Daphnia magna to determine the eco-friendliness of yellow loess compared with that of cement *** showed the survival of Daphnia magna was longer in the indoor environment of a test chamber with higher concentration of ammonia wherein yellow loess was ***50(median effective concentration,the concentration that caused death of 50%of bio-specimens)value of 19 ml of ammonia(0.1%solution),which was three times more than EC50 value of 6 ml of ammonia of the same area of cement mortar.

关键词： eco-friendly material yellow loess Daphnia magna evaluation CEC gas adsorption

3D printed energy devices:generation,conversion,and storage

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Microsystems & Nanoengineering 2024年第4期10卷 23-41页

作者： Jin-ho Son hongseok Kim Yoonseob Choi Howon Lee Department of Mechanical Engineering Institute of Advanced Machines and DesignSeoul National UniversitySeoulRepublic of Korea

The energy devices for generation,conversion,and storage of electricity are widely used across diverse aspects of human life and various ***-dimensional(3D)printing has emerged as a promising technology for the fabrication of energy devices due to its unique capability of manufacturing complex shapes across different length scales.3D-printed energy devices can have intricate 3D structures for significant performance enhancement,which are otherwise impossible to achieve through conventional manufacturing ***,recent progress has witnessed that 3D-printed energy devices with micro-lattice structures surpass their bulk counterparts in terms of mechanical properties as well as electrical *** existing literature focuses mostly on specific aspects of individual printed energy devices,a brief overview collectively covering the wide landscape of energy applications is *** review provides a concise summary of recent advancements of 3D-printed energy *** classify these devices into three functional categories;generation,conversion,and storage of energy,offering insight on the recent progress within each ***,current challenges and future prospects associated with 3Dprinted energy devices are discussed,emphasizing their potential to advance sustainable energy solutions.

关键词： 3D printing 3D-printed energy device Energy generation device Energy conversion device Energy storage device

Solution-processable electrode-material embedding in dynamically inscribed nanopatterns(SPEEDIN)for continuous fabrication of durable flexible devices

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Microsystems & Nanoengineering 2021年第5期7卷 173-181页

作者： Wonseok Lee Hyoungseok Chae Dong Kyo Oh Minyoung Lee Hyunsoo Chun Gyubeom Yeon Jaewon Park Joohoon Kim hongseok Youn Junsuk Rho Jong G.Ok Department of Mechanical and Automotive Engineering Seoul National University of Science and TechnologySeoul 01811Republic of Korea Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Graduate Program of Energy Technology School of Integrated TechnologyInstitute of Integrated TechnologyGwangju Institute of Science and TechnologyGwangju 61005Republic of Korea Department of Mechanical Engineering Hanbat National UniversityDaejeon 34158Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics Pohang 37673Republic of Korea

A facile and scalable lithography-free fabrication technique,named solution-processable electrode-material embedding in dynamically inscribed nanopatterns(SPEEDIN),is developed to produce highly durable *** uniquely utilizes a single continuous flow-line manufacturing process comprised of dynamic nanoinscribing and metal nanoparticle solution coating with selective ***-and/or micro-trenches are inscribed into arbitrary polymers,and then an Ag nanoparticle solution is dispersed,soft-baked,doctor-bladed,and hard-baked to embed Ag micro-and nanowire structures into the *** to lithographically embossed metal structures,the embedded SPEEDIN architectures can achieve higher durability with comparable optical and electrical properties and are robust and power-efficient even under extreme stresses such as scratching and *** one tangible application of SPEEDIN,we demonstrate a flexible metal electrode that can operate at 5 V at temperatures up to 300℃even under the influence of harsh external *** can be applied to the scalable fabrication of diverse flexible devices that are reliable for heavy-duty operation in harsh environments involving high temperatures,mechanical deformations,and chemical hazards.

关键词： electrode process embedding

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汽车电磁兼容中的建模挑战

安全与电磁兼容 2021年第6期 9-14页

作者：范峻 hongseok Kim 蒲菠(译) 密苏里科技大学电磁兼容中心宁波德图科技有限公司

随着汽车向智能化和互联化发展,汽车电磁兼容性(EMC)变得越来越重要。相较于传统的在最后阶段解决电磁兼容问题,将EMC设计和风险控制纳入早期设计阶段至关重要,可以有效实现这一目标的仿真技术也变得愈发关键。通过仿真还可以研究许多... 详细信息

随着汽车向智能化和互联化发展,汽车电磁兼容性(EMC)变得越来越重要。相较于传统的在最后阶段解决电磁兼容问题,将EMC设计和风险控制纳入早期设计阶段至关重要,可以有效实现这一目标的仿真技术也变得愈发关键。通过仿真还可以研究许多电磁兼容问题,如模块级和系统级的电磁干扰(EMI)测试的不一致问题。但由于计算资源、计算机算法的限制以及关键信息的缺乏,汽车电磁兼容的仿真往往具有很大的挑战性。本文以电机驱动系统对安装在混合动力电动汽车(HEV)上的射频天线的射频干扰为例,说明了混合动力车辆级仿真面临的挑战,提出了一种分而治之的解决方案,并验证了其有效性。

关键词：汽车电磁兼容车辆级建模射频干扰电机驱动系统共模电流束分而治之仿真法