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Frontiers of Environmental Science & Engineering 2024年第7期18卷 73-85页

作者： Sanggwon An sangsoo ch.i Hyeong Rae Kim Jungho Hwang School of Mechanical Engineering Yonsei UniversitySeoul 02876Republic of Korea Gas Metrology Group Korea Research Institute of Standards and Science(KRISS)Daejeon 34113Republic of Korea

The World Health Organization has raised concerns about the possibility of airborne transmission in enclosed and poorly ventilated ***,rapid monitoring of airborne viruses is necessary in multi-use facilities with dense ***,an electrostatic air sampler(250 L/min)was developed in this work to obtain indoor viral aerosol samples for analysis via the Polymerase ch.in Reaction(PCR).Aerosol tests with H1N1 and HCoV-229E were performed to evaluate the sample collection *** analysis,along with another aerosol test,was conducted to evaluate the recovery of the virus particles collected by the *** laboratory tests,our electrostatic sampler obtained viral samples that were detectable by PCR under the simulated viral pandemic scenario(3000 RNA copies per cubic meter of air)within 40 *** resulting cycle threshold(C)values were 35.07 and 37.1 for H1N1 and HCoV-229E,*** the performance evaluation in the laboratory,field tests were conducted in a university classroom from October 28 to December 2,*** A and HCoV-229E were detected in two air samples,and the corresponding C,values were 35.3 and *** PCR results are similar to those obtained from laboratory tests,considering the simulatedviralpandemic scenario.

关键词： Airborne virus Electrostatic sampler Rapid monitoring indoor environment Field test

Muscular activity patterns in 1-legged vs. 2-legged pedaling

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Journal of Sport and Health Science 2021年第1期10卷 99-106页

作者： sangsoo Park Graham E.Caldwell Department of Kinesiology University of Massachusetts AmherstAmherstMA 01003USA

Background:One-legged pedaling is of interest to elite cyclists and ***,muscular usage in 1-legged vs.2-legged pedaling is not fully ***,the study was aimed to examine changes in leg muscle activation patterns between 2-legged and 1-legged ***:Fifteen healthy young recreational cyclists performed both 1-legged and 2-legged pedaling trials at about 30 Watt per *** electromyography electrodes were placed on 10 major muscles of the left *** envelope electromyography data were integrated to quantify muscle activities for each crank cycle quadrant to evaluate muscle activation ***:Overall,the prescribed constant power requirements led to reduced downstroke crank torque and extension-related muscle activities(vastus lateralis,vastus medialis,and soleus)in 1-legged ***-related muscle activities(biceps femoris long head,semitendinosus,lateral gastrocnemius,medial gastrocnemius,tensor fasciae latae,and tibialis anterior)in the upstroke phase increased to compensate for the absence of contralateral leg crank *** the upstroke,simultaneous increases were seen in the hamstrings and uni-articular knee extensors,and in the ankle plantarflexors and *** the top of the crank cycle,greater hip flexor activity stabilized the ***:The observed changes in muscle activities are due to a variety of changes in mechanical aspects of the pedaling motion when pedaling with only 1 leg,including altered crank torque patterns without the contralateral leg,reduced pelvis stability,and increased knee and ankle stiffness during the upstroke.

关键词： Electromyography Muscle activity One-leg Pedaling

Thyroid cartilage elevation maneuver: a novel and easy-to-perform method to insert a supraglottic airway device

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chinese Medical Journal 2021年第18期134卷 2266-2268页

作者： Sangun Nah Gi Woon Kim sangsoo Han Department of Emergency Medicine Soonchunhyang University Bucheon HospitalBucheonRepublic of Korea.

To the Editor:A supraglottic airway device(SAD)can be used instead of an endotracheal tube(ET)in emergency *** are two types of SAD,cuffed and non-cuffed,the ease of use and success rates of which are *** to ET insertion,SAD insertion is quick and simple,while providing comparable *** 2019 American Heart Association guideline recommends SAD insertion in emergency situations,such as out-of-hospital cardiac arrest.[1,2]However,the success of SAD insertion is not easily *** to one study,when a SAD was used in an emergency medical service(EMS)setting,airway failure was not recognized in 13.8%of patients.[3]incorrect positioning of a SAD is evidenced by bite block malalignment with the incisors and ineffective gas exchange(characterized by thoracic and“front of neck”excursions,inadequate tidal volume,low arterial oxygen saturation[SpO_(2)],poor capnograph trace,high airway pressure,and air leak).[1,4]Failure to insert a SAD to the proper depth typically results from the resistance of structures around the hypopharynx.[5]in this study,we introduce the thyroid cartilage elevation(TCE)maneuver,a simple and novel method that facilitates correct insertion of a SAD.

关键词： airway insertion supra

Response to: Caution needed when interpreting muscle activity patterns during extremely low pedaling cadence

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Journal of Sport and Health Science 2021年第1期10卷 109-110页

作者： sangsoo Park Graham E.Caldwell Department of Kinesiology University of Massachusetts AmherstAmherstMA 01003USA

Dear editor,We would like to thank Drs Sun and Li for their interests and observations for our recently published article entitled“Muscular activity patterns in 1-legged vs.2-legged pedaling”.We have carefully read their letter and agree with their underlying premise that our low cadence is not indicative of competitive,recreational,or(in some cases)clinical 2-legged pedaling ***,our results were not meant to be extrapolated to higher cadences,as clearly stated in the Limitations Section of the Discussion:“The results of this study do not necessarily extend to muscular control in one-legged pedaling tasks with different mechanical demands,as our participants were asked to perform pedaling tasks with relatively low crank torque and velocity.”1 Further,we stand by the initial statement of the Abstract that“One-legged pedaling is of interest to elite cyclists and clinicians.”in the introduction we cite 2 studies2,3 that refer to 1-legged cycling:“As such,1-legged pedaling has been suggested as a training tool to improve pedaling performance and is used in clinical settings for rehabilitation.”1 Our opening Abstract statement(which would presumably be read before the Results and Discussion)was not meant to imply that our study results would be directly applicable to elite cyclists and all clinical populations/treatments,as Drs Sun and Li seem to infer.

关键词： statement elite interpreting

improving Application Launch Performance on Solid State Drives

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Journal of Computer Science & Technology 2012年第4期27卷 727-743页

作者： Yongsoo Joo Junhee Ryu sangsoo Park Kang G.Shin Department of Computer Science and Engineering Ewha Womans University iEEE Department of Computer Science and Engineering Seoul National University Department of Electrical Engineering and Computer Science University of Michigan

Application launch performance is of great importance to system platform developers and vendors as it greatly affects the degree of users＇ satisfaction. The single most effective way to improve application launch performance is to replace a hard disk drive （HDD） with a solid state drive （SSD）, which has recently become affordable and popular. A natural question is then whether or not to replace the traditional HDD-aware application launchers with a new SSD-aware optimizer. We address this question by analyzing the inefficiency of the HDD-aware application launchers on SSDs and then proposing a new SSD-aware application prefetching scheme, called the Fast Application STarter （FAST）. The key idea of FAST is to overlap the computation （CPU） time with the SSD access （i/O） time during an application launch. FAST is composed of a set of user-level components and system debugging tools provided by Linux OS （operating system）. Hence, FAST can be easily deployed in any recent Linux versions without kernel recompilation. We implement FAST on a desktop PC with an SSD running Linux 2.6.32 OS and evaluate it by launching a set of widely-used applications, demonstrating an average of 28% reduction of application launch time as compared to PC without a prefetcher.

关键词： application launch performance i/O prefetch solid state drive

Acousto-Optics Tunable Filter Based on a Hollow Optical Fiber for Broadband Polarization Switch Application

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光学学报 2003年第S1期23卷 193-194页

作者： Jaewon Lee Jaewang Yu sangsoo ch.i Kyunghwan Oh Dong il Yum Byoung Yoon Kim Department of information and Communications Kwang- Ju Institute of Science and Technology Kwangju Buk-gu 500-712 Rep. of Korea Department of Physics Korea Advanced Institute Science and Technology Taejon 305701 Rep. of Korea

A novel acousto-optic tunable filter (AOTF) using a hollow optical fiber (HOF) is proposed. its broadband rejection over 100nm was observed and high polarization dependence as a polarization switch.is discussed.

关键词： Hollow Optical Fiber hollow optical fiber tunable filter

A case study of WebGiS technology for distance learning between Korea and Japan

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重庆邮电学院学报（自然科学版） 2004年第5期16卷 23-27页

作者： JUN Byungdug LEE sangsoo FUJiKi Takashi MORiTA Yusuke Faculty of Education Nagasaki University 1 14 Bunkyo Nagasaki City852 8521JapanCollege of Education Chonnam National University 300 Yongbong Dong Buk Gu Kwangju City 500 757 KoreaFaculty of Education Nagasaki University 1 14 Bunkyo Nagasaki City852 8521JapanFaculty of Education Nagasaki University 1 14 Bunkyo Nagasaki City852 8521Japan

Recently, some case study of distance learning by internet line are widely carried out. Until now, the cultural or friendship exchange was a main purpose using distance learning program. in our research group, a distance learning which connected 3 sites (Nagasaki and Omura and Kagoshima in Japan) was tried as a domestic example[1]. in this case, internet exclusive line and portable telephone were utilized for DVTS tech.ical support of distance learning. Nowadays, the international distance learning for education is also beginning. Our research group also tried international distance learning between Kwangju city of Korea and Nagasaki city of Japan using DVTS tech.iques with the tools of WebGiS education materials.

关键词： WebGiS 数学视频传输韩国日本电缆网远程学习

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转codA基因杨树耐旱性增强的生理机制

应用与环境生物学报 2017年第1期23卷 60-66页

作者：孙振玫李红兵张丽娟可庆波王仕稳郭尚洙邓西平西北农林科技大学林学院杨陵712100 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室杨陵712100 西北农林科技大学生命科学学院杨陵712100 韩国生命工学研究院大田305-806

研究转胆碱氧化酶(codA)基因杨树对干旱胁迫的响应机制可为杨树耐旱育种及应用提供理论依据.在盆栽条件下研究土壤干旱胁迫及复水对转基因杨树(T)和野生型(NT)生长的影响及叶片中MDA、H_2O_2、甜菜碱含量和抗氧化酶活性等生理指标的影响... 详细信息

研究转胆碱氧化酶(codA)基因杨树对干旱胁迫的响应机制可为杨树耐旱育种及应用提供理论依据.在盆栽条件下研究土壤干旱胁迫及复水对转基因杨树(T)和野生型(NT)生长的影响及叶片中MDA、H_2O_2、甜菜碱含量和抗氧化酶活性等生理指标的影响.结果显示:(1)干旱胁迫后,转基因杨树和野生型的株高、总生物量增长都减慢,但转基因杨树生长状况优于野生型且复水后恢复较快;胁迫5周后,转基因杨树地上地下部的干重分别降低了21.01%和22.97%,而野生型地上地下部的干重则较对照分别降低了47.21%和52.11%,与正常供水相比,转基因植株地上地下部的干重显著高于野生型.(2)杨树叶片中过氧化氢(H_2O_2)、丙二醛(MDA)含量在干旱胁迫后先增加后降低,复水后继续下降,但转基因杨树积累量低于野生型;干旱胁迫下,转基因杨树叶片中游离脯氨酸和甜菜碱的含量显著高于野生型,干旱胁迫3周后,转基因杨树叶片中甜菜碱含量是野生型的2.38倍.(3)随干旱时间延长,杨树叶片中SOD、POD、CAT和APX酶活性逐渐增加,复水后下降,除POD外,转基因杨树抗氧化酶活性普遍高于野生型.本研究结果说明渗透调节物质含量的增加及抗氧化能力的增强是转基因杨树耐旱性和复水后恢复能力增强的内在生理机制.

关键词：胆碱氧化酶转基因杨树干旱胁迫耐旱性甜菜碱

过表达ibOr基因甘薯增强抗旱性的生理机制

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西北植物学报 2015年第3期35卷 540-545页

作者：陈晓丽李红兵王林林李孟洁李雨霖郭尚洙邓西平西北农林科技大学生命科学学院陕西杨陵712100 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室陕西杨陵712100 韩国生命工学研究院

以超表达甘薯橙色基因(ibOr)的转基因甘薯(TS)以及非转基因甘薯(NT)为实验材料,通过15%聚乙二醇6000(PEG-6000)模拟干旱条件,研究转基因与非转基因甘薯幼苗在水分胁迫不同时间的光合系统,膜脂过氧化及抗氧化防御系统中主要指标的变化情... 详细信息

以超表达甘薯橙色基因(ibOr)的转基因甘薯(TS)以及非转基因甘薯(NT)为实验材料,通过15%聚乙二醇6000(PEG-6000)模拟干旱条件,研究转基因与非转基因甘薯幼苗在水分胁迫不同时间的光合系统,膜脂过氧化及抗氧化防御系统中主要指标的变化情况,探讨转基因甘薯耐旱性的生理机制。结果显示:(1)随PEG-6000胁迫时间延长,甘薯叶片的叶绿素、类胡萝卜素含量及其叶片净光合速率、气孔导度、胞间CO2浓度、蒸腾速率都显著降低,但转基因株系降低幅度小于非转基因植株。(2)在正常供水和水分胁迫下,超表达ibOr基因甘薯叶片中O-·2、MDA含量均低于非转基因甘薯,即转基因甘薯具有较低的活性氧水平且脂膜受损伤较小。(3)PEG-6000胁迫24h后,甘薯叶片中SOD、POD酶活性均增加,48h达到最大值,且转基因甘薯中2种酶活性显著高于非转基因甘薯。研究表明,过表达ibOr基因可以有效减轻甘薯在水分胁迫条件下受损害的程度,且可能主要通过提高甘薯的抗氧化胁迫能力来完成。

关键词：转基因甘薯水分胁迫光合系统抗氧化系统

转ibLEA 14基因杨树增强耐旱性的生理机制

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分子植物育种 2019年第8期17卷 2628-2638页

作者：乔焕焕李红兵孙振玫可庆波王仕稳郭尚洙邓西平西北农林科技大学生命科学学院杨陵712100 西北农林科技大学水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室杨陵712100 西北农林科技大学林学院杨陵712100 韩国生命工学研究院

晚期胚胎蛋白富集蛋白(LEA)可作为多功能蛋白参与对多种非生物胁迫的响应。前期研究表明,过量表达甘薯ibLEA14基因能够增强转基因甘薯愈伤组织的耐渗透压和盐胁迫能力。为研究转ibLEA14基因杨树增强耐旱性的生理机制,本试验选取转ibLEA1... 详细信息

晚期胚胎蛋白富集蛋白(LEA)可作为多功能蛋白参与对多种非生物胁迫的响应。前期研究表明,过量表达甘薯ibLEA14基因能够增强转基因甘薯愈伤组织的耐渗透压和盐胁迫能力。为研究转ibLEA14基因杨树增强耐旱性的生理机制,本试验选取转ibLEA14基因杨树与非转基因杨树(NT)为材料,采用盆栽控水法,进行土壤干旱胁迫与复水处理,测定其形态与生理生化指标。结果表明:(1)干旱胁迫下,转ibLEA14基因杨树与NT株高增长、总生物量积累均受到抑制,但转基因杨树生长状况优于NT;与NT相比,转ibLEA14基因杨树叶片净光合速率较高,丙二醛(MDA)和过氧化氢(H2O2)含量较低,较高的脯氨酸(Pro)含量与较低的渗透势保障了转基因杨树较强的保水能力以及较高的叶片相对含水量。(2)复水后,较干旱条件下而言,转ibLEA14基因杨树叶片相对含水量增加,净光合速率升高,MDA和H2O2含量降低,Pro含量下降,渗透势升高。研究表明:转ibLEA14基因杨树可减轻干旱胁迫对植株细胞膜及光和系统的伤害,复水后能够更好地修复细胞膜系统与光合系统,加快恢复速度。因此,转ibLEA14基因杨树的耐旱性与旱后复水的恢复能力更好,更具有抗旱性优势。该研究结果将为杨树耐旱育种及应用提供理论依据,未来有望在改善土壤沙漠化方面发挥重要作用。

关键词：转基因杨树干旱胁迫旱后复水抗氧化特性光合速率