포스터 전시 : 상부위장관 ; 십이지장을 침범한 Henoch-Schonlein 자반증 1예

염문선 ( Yeom Mun Seon ),심기남 ( Sim Gi Nam ),이한효 ( Lee Han Hyo ),남준식 ( Nam Jun Sig ),최희정 ( Choe Hui Jeong ),문일환 ( Mun Il Hwan ),김성은 ( Kim Seong Eun ),이지수 ( Lee Ji Su ),정성애 ( Jeong Seong Ae ),정혜경 ( Jeong H 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-

Henoch-Schonlein 자반증은 촉진성 자반, 관절통, 복통, 사구체신염을 특징적으로 하는 전신성 괴사성 혈관염이다. 저자들은 내원 2일전부터 생긴 하지의 자반 및 간헐적인 복통과 내원 당일에 발생한 고열을 주소로 내원하여 십이지장을 침범한 Henoch-Schonlein 자반증으로 진단된 1례를 경험하였기에 보고하는 바이다. 평소 건강히 지내던 43세 남자가 내원 2일전부터 양쪽 발부터 시작되어 다리로 확장된 자반 및 간헐적인 복통과 내원 당일에

8주간 수중훈련 프로그램이 고교 축구선수 등속성 근력 및 인스텝 킥의 수행력에 미치는 영향

염준우(Jun Woo Yeom),황성호(Sung Ho Hwang),최명렬(Myong Yol Choi),이성기(Seung Ki Lee),김명기(Myung Gi Kim) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34

The purpose of this study is to show the effects of aquatic training with high school soccer player on in-step shooting speed and accuracy of kick, muscle strength of lower extremities and balance. The subjects of this study were 9 high school-soccer players with a career more than 6 years and they participated in aquatic training for 8 weeks before and after, that the study consist of in-step shooting speed, accuracy of in-step kick, isokinetic strength of ankle and knee joint and balance. We used SPSS 12.0 in order to analyze the results through the research, and compared the measurement subject by using the standard deviation of the mean. In addition, we did paired 2-sample non-parametic test for comparison of variables before and after the experiment and Spearman`s Bivariate Correlation Analysis for relationship of respective variables. The level of significance is set up to 0.05 The results of the study were as follows; 1. In the shooting speed was significantly differentiated pre and post-test(p<.05). 2. In the accuracy of in-step kick was significantly differentiated pre and post-test(p<.05). 3. In the muscle strength of knee flexor and extensor were improvement pre and post but not significantly differentiated. In the muscle strength of ankle dorsiflexor and plantarflexor were significantly differentiated(p<.05). 4. In the one leg standing, muscle strength of the left leg was improvement but not significantly differentiated and the right leg was significantly differentiated(p<.05). 5. Right ankle plantarflexor was significantly differentiated with exercise performance of in-step kick pre and post(p<.05), balance was significantly differentiated with high and mean speed pre and post(p<.05). Therefore, based on the result, it is indicated that the aquatic training had a positive effect on the shooting speed, accuracy of kick, muscle strength of lower extremities and balance. It is considered that give helps to improve ball speed and accuracy.

안정시 항문괄약근압이 감소된 변비환자에서 배변장애의 특성

남준식 ( Nam Jun Sig ),정성애 ( Jeong Seong Ae ),심기남 ( Sim Gi Nam ),이한효 ( Lee Han Hyo ),염문선 ( Yeom Mun Seon ),김성은 ( Kim Seong Eun ),이정경 ( Lee Jeong Gyeong ),정혜경 ( Jeong Hye Gyeong ),김도영 ( Kim Do Yeong ),유권 대한소화기학회 2003 대한소화기학회 추계학술대회 Vol.2003 No.-

<목적> 항문내압검사에서 안정시 항문괄약근압이 비정상적으로 감소되었음에도불구하고 변실금이 아닌 변비를 호소하는 환자들에서 배변장애의 기전을 이해하기 위하여 항문직장의 생리학적 지표들을 분석하고자 하였다. <방법> 2001년 12월부터 2003년 7월까지 골반저 근실조로 진단된 37명의 환자를 대상으로 안정시 항문괄약근압이 감소된 군(이하 감소군) 22명과 정상군 15명을 구분하여 항문직장내압검사와 배변조영술 결과를 후향적으로 비교분석하였다. <결과> 감

Overview of Various Measurement Tools for Shoulder Kinematics

Doo Sup Kim,Myoung Gi On,Jun Seop Yeom 대한견주관절의학회 2017 대한견주관절의학회지 Vol.20 No.4

Shoulder kinematics is important, as it is associated with shoulder arthropathy and pain mechanisms. Various static and dynamic analysis methods are prevalent for shoulder kinematics. These include 2-dimensional plane x-ray, computed tomography, and magnetic resonance imaging, cadaver study, electromagnetic motion analysis, transcortical bone pins technique, and in vivo 3-dimensional motion analysis. Although these methods provide the value of the shoulder kinematics angle, they are unable to explain why such changes occur. Since each method has its pros and cons, it is important to understand all factors accurately, and to choose a method that best meets the purpose of the researcher.

Preliminary Disposal Safety Assessment of Activated Carbon Waste Used as Filtering Material

Hyun Woo Song,Sang June Park,Jun-gi Yeom,Moonoh Kim 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

Activated carbon (AC) is used for filtering organic and radioactive particles, in liquid and ventilation systems, respectively. Spent ACs (SACs) are stored till decaying to clearance level before disposal, but some SACs are found to contain C-14, a radioactive isotopes 5,730 years halflife, at a concentration greater than clearance level concentration, 1 Bq/g. However, without waste acceptance criteria (WAC) regarding SACs, SACs are not delivered for disposal at current situation. Therefore, this paper aims to perform a preliminary disposal safety examination to provide fundamental data to establish WAC regarding SACs SACs are inorganic ash composed mostly of carbon (~88%) with few other elements (S, H, O, etc.). Some of these SACs produced from NPPs are found to contain C-14 at concentration up to very-low level waste (VLLW) criteria, and few up to low-level waste (LLW) criteria. As SACs are in form of bead or pellets, dispersion may become a concern, thus requiring conditioning to be indispersible, and considering VLL soils can be disposed by packaging into soft-bags, VLL SACs can also be disposed in the same way, provided SACs are dried to meet free water requirement. But, further analysis is required to evaluate radioactive inventory before disposal. Disposability of SACs is examined based on domestic WAC’s requirement on physical and chemical characteristics. Firstly, particulate regulation would be satisfied, as commonly used ACs in filters are in size greater than 0.3 mm, which is greater than regulated particle size of 0.2 mm and below. Secondly, chelating content regulation would be satisfied, as SACs do not contain chelating chemicals. Also, cellulose, which is known to produce chelating agent (ISA), would be degraded and removed as ACs are produced by pyrolysis at 1,000°C, while thermal degradation of cellulose occurs around 350~600°C. Thirdly, ignitability regulation would be satisfied because as per 40 CFR 261.21, ignitable material is defined with ignition point below 60°C, but SACs has ignition point above 350°C. Lastly, gas generation regulation would be satisfied, as SACs being inorganic, they would be targeted for biological degradation, which is one of the main mechanism of gas generation. Therefore, SACs would be suitable to be disposed at domestic repositories, provided they are securely packaged. Further analysis would be required before disposal to determine detailed radioactive inventories and chemical contents, which also would be used to produce fundamental data to establish WAC.

Review on the Reasonable Methodology for Indirect Evaluation of Difficult-to- Measure Nuclides Inventory in Radioactive Waste Packages

Hang-Rae Cho,Ji-Eun Park,Jun-Gi Yeom,Sun-Gab Park 한국방사성폐기물학회 2021 한국방사성폐기물학회 학술논문요약집 Vol.2021 No.11

Review on the Prerequisites for Disposal Delivery of Polymer Concrete High Integrity Container (PC-HIC) Packages

Hang-Rae Cho,Mi-Hyun Lee,Jun-Seok Nam,Sang-June Park,Jun-Gi Yeom 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

Licensing for the application of the Polymer Concrete High Integrity Container (PC-HIC) to nuclear power plants has been completed or is in progress. Approval for the expanded application to all domestic nuclear power plants has been completed to utilize the 860 L PC-HICs for the 2nd stage surface repository, and the regulatory body is reviewing the license application to use the 510 L PCHICs for the 1st stage underground repository in the representative nuclear power plants. The 860 L PC-HICs, which have been licensed for all domestic nuclear power plants, will be used for safe storage management and disposal of low-dose dried concentrate waste and spent resin, and a total of 100 units is expected to be supplied to representative nuclear power plants that have been licensed first. The 510 L PC-HICs are planned to be used for underground disposal of high-dose spent resin and dried concentrate waste. Prior to the application of PC-HICs to nuclear power plants and disposal to the repository, it is necessary to establish realistic and reasonable requirements through close consultations between waste generator and disposal operators to ensure the suitability for disposal of PC-HIC packages and to carry out disposal delivery and acceptance work. Since the Polymer Concrete High Integrity Container (PC-HIC) has long-term integrity of more than 300 years and the barrier does not temporarily collapse, spent resin and dried concentrate waste, which are radioactive wastes to be solidified, can be disposed of much more safely in PC-HIC packages than solidified types. Acceptance criteria for the PC-HIC packages should be prepared fully reflecting the advantages of PC-HIC, and quality assurance methods for physical/chemical/radiological characterization results based on the Waste Certification Program (WCP) should be supported. In addition, infrastructure should be secured for safe transportation, handling, and storage of the PC-HIC packages. In this paper, we have tried to find a reasonable acceptance criteria, quality assurance method, and infrastructure level according to the dose and disposal conditions of PC-HIC packages.

반송파 측정값 기반 GNSS 궤도력 고장 검출 알고리즘 성능 분석

안종선(Jongsun Ahn),전향식(Hyang-Sig Jun),남기욱(Gi-Wook Nam),염찬홍(Chan-Hong Yeom),이영재(Young Jae Lee),성상경(Sangkyung Sung) 한국항공우주학회 2014 韓國航空宇宙學會誌 Vol.42 No.6

본 논문에서는 위성항법시스템의 무결성 저해 요인 중, 항법메시지에 담겨 전송되는 궤도력 (Ephemeris) 정보의 고장 여부를 판단할 수 있는 알고리즘을 분석 및 성능 평가를 수행하였다. 알고리즘은 반송파 측정값과 두 지상 기준국간의 기저벡터 정보가 활용된다. 주요 특징으로 기준국 기저선과 위성이 이루는 기하학적 조건 기저선 길이에 따라 동일 궤도력 고장에 대해 알고리즘의 성능의 편차가 발생할 수 있음을 확인하였다. 또한 알고리즘 적용이 적합한 GBAS의 지상 기준국 안테나 배치 방안 및 제주국제공항에 운용되었을 때의 한계치 및 성능 지표 (MDE : Minimum Detectable Error)를 계산하였다. We analyze fault detection algorithm of ephemeris included in navigation message, which is one of the GNSS risk factors. This algorithm uses carrier-phase measurement and baseline vector of two reference stations and is alternative method for uncertainty condition of previous ephemeris. Even though same ephemeris fault is occurred, the geometry condition, between baseline vector of reference stations and satellites, effects on performance of algorithm. Also, we introduce the suitable geometry of reference stations, threshold and performance index (MDE : Minimum Detectable Error) in jeju international airport

A Background Study of VLLW Spent Resin Solidification

Hyun Woo Song,Sang June Park,Jun-gi Yeom,Moonoh Kim 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.2

Domestic waste acceptance criteria (WAC) require flowable or homogeneous wastes, such as spent resin, concentrated waste, and sludge, etc., to be solidified regardless of radiation level, to provide structural integrity to prevent collapse of repository, and prevent leaching. Therefore, verylow level (VLL) spent resin (SR) would also require to be solidified. However, such disposal would be too conservative, considering IAEA standards do not require robust containment and shielding of VLL wastes. To prevent unnecessary cost and exposure to workers, current WAC advisable to be amended, thus this paper aims to provide modified regulation based on reviewed engineering background of solidification requirement. According to NRC report, SR is classified as wet-solid waste, which is defined as a solid waste produced from liquid system, thus containing free-liquid within the waste. NRC requires liquid wastes to be solidified regardless of radiation level to prevent free liquid from being disposed, which could cause rapid release of radionuclides. Furthermore, considering class A waste does not require structural integrity, unlike class B and C wastes, dewatering would be an enough measure for solidification. This is supported by the cases of Palo Verde and Diablo Canyon nuclear power plants, whose wet-solid wastes, such as concentrated wastes and sludge, are disposed by packaging into steel boxes after dewatering or incineration. Therefore, dewatering VLL spent resin and packaging them into structural secure packaging could satisfy solidification goal. Another goal of solidification is to provide structural support, which was considered to prevent collapse of soil covers in landfills or trenches. However, providing structural support via solidification agent (ex. Cement) would be unnecessary in domestic 2nd phase repository. As the domestic 2nd phase repository is cementitious structure, which is backfilled with cement upon closure, the repository itself already has enough structural integrity to prevent collapse. Goldsim simulation was run to evaluate radiation impact by VLL SR, with and without solidification, by modelling solidified wastes with simple leaching, and unsolidified wastes with instant release. Both simulations showed negligible impact on radiation exposure, meaning that solidifying VLL SR to delay leaching would be irrational. Therefore, dewatering VLL SR and packaging it into a secure drum (ex. Steel drum) could achieve solidification goals described in NRC reports and provide enough safety to be disposed into domestic repositories. In future, the studied backgrounds in this paper should be considered to modify current WAC to achieve efficient waste management.

Proposal on the Cellulose Degradation Model for the Domestic 1st Phase Underground Repository

Hyun Woo Song,Moonoh Kim,Sang June Park,Sungjun Kim,Jun-gi Yeom 한국방사성폐기물학회 2023 한국방사성폐기물학회 학술논문요약집 Vol.21 No.1

With the recent concern regarding cellulose enhancing radionuclide mobility upon its degradation to ISA, disposal of cellulosic wastes is being held off until the disposal safety is vindicated. Thus, a rational assessment should be conducted, applying an appropriate cellulose degradation model considering the disposal environment and cellulose degradation mechanisms. In this paper cellulose degradation mechanisms and the disposal environment are studied to propose the best-suitable cellulose degradation model for the domestic 1st phase repository. For the cellulose to readily degrade, the pH should be greater than 12.5. As in the case of SKB, 1BLA is excluded from the safety assessment because the pH of 1BLA remains below 12.5. Furthermore, despite cellulose degradation occurring, it does not always produce ISA. At low Ca2+ concentration, the ISA yield rate is around 25%, but at high Ca2+ concentration, the ISA yield rate increases up to 90%. Thus, for the cellulose to be a major concern, both pH and Ca2+ concentration conditions must be satisfied. To satisfy both conditions, the cement hydration must be in 2nd phase, when the porewater pH remains around 12.5 and a significant amount of Ca2+ ion is leaching out from the cement. However, according to the safety evaluation and domestic research, 2nd phase of cement hydration for silo concrete would achieve a pH of around 12.4, dissatisfying cellulose degradation condition like in 1BLA. Thus, cellulose degradation would be unlikely to occur in the domestic 1st phase repository. To derive waste acceptance criteria, a quantitative evaluation should be conducted, conservatively assuming cellulose is degraded. To conduct a safety evaluation, an appropriate degradation model should be applied to determine the degradation rate of cellulose. According to overseas research, despite the mid-chain scission being yet to be seen in the experiments, the degradation model considering mid-chain scission is applied, resulting in an almost 100% degradation rate. The model is selected because the repositories are backfilled with cement, achieving a pH greater than 13, so extensive degradation is reasonably conservative. However, under the domestic disposal condition, where cellulose degradation is unlikely to occur, applying such model would be excessively conservative. Thus, the peeling and stopping model derived by Van Loon and Haas, which suggests 10~25% degradation rate, is reasonably conservative. Based on this model, cellulose would not be a major concern in the domestic 1st phase repository. In the future, this study could be used as fundamental data for planning waste acceptance criteria.