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김현중,김우환,이상철,임종호,조상희,김아현,Kim, Hyun-Joong,Kim, Woo-Hwan,Lee, Sang-Cheol,Im, Jong-Ho,Cho, Sang-Hee,Kim, Ah-Hyoun 한국통계학회 2008 Communications for statistical applications and me Vol.15 No.5
본 논문은 금융기관에서 활용하고 있는 운영리스크 측정모형에 대한 적합성검증 방법 중 안정성 검증에 관한 것이다. 신용리스크와는 달리 운영리스크는 손실자료의 특징, 과거 자료의 부족 그리고 적합성검증을 위한 이론적 도구의 부족 등으로 인해 현재 적절한 적합성검증 방안에 제시되지 못하고 있다. 본 논문에서는 운영리스크 VaR(Value at Risk) 추정값의 안정성을 평가하는 적합성검증 방법을 제시하고 이를 활용한 실증분석을 통해 제안된 방법에 대한 실제적 활용 가능성을 확인해 보고자 한다. 구체적으로 본 논문에서는 붓스트랩 방법을 활용하여 운영리스크 VaR의 신뢰구간을 생성함으로써 운영리스크 VaR 추정값의 안정성을 검증하는 기법을 제안하였으며, 이를 토대로 적합에 따른 운영리스크 VaR 추정값의 안정성을 측정하는 방안도 제시하였다. Operational risk is defined as the risk of loss resulting from inadequate or failed internal processes, people and systems, or external events. The advanced measurement approach proposed by Basel committee uses loss distribution approach(LDA) which quantifies operational loss based on bank's own historical data and measurement system. LDA involves two distribution fittings(frequency and severity) and then generates aggregate loss distribution by employing mathematical convolution. An objective validation for the operational risk measurement is essential because the operational risk measurement allows flexibility and subjective judgement to calculate regulatory capital. However, the methodology to verify the soundness of the operational risk measurement was not fully developed because the internal operational loss data had been extremely sparse and the modeling of extreme tail was very difficult. In this paper, we propose a methodology for the validation of operational risk measurement based on bootstrap confidence intervals of operational VaR(value at risk). We derived two methods to generate confidence intervals of operational VaR.
김현중,양현호,Kim, Hyun-Joong,Yang, Hyun-Ho 한국정보통신학회 2011 한국정보통신학회논문지 Vol.15 No.7
유비쿼터스 컴퓨팅 기술의 발전과 함께 의료와 접목되어 시간과 공간에 구애받지 않고 언제 어디서나 건강관리를 받을 수 있는 새로운 형태의 의료서비스인 U-헬스케어가 많은 관심을 받고 있다. U-헬스케어를 실현하기 위해서는 일상생활 중 안정적인 생체정보 모니터링이 필수적이며 사용자를 구속하지 않으면서 생체정보를 간편히 측정할 수 있는 생체정보 측정 모듈이 연구되고 있으며 이를 통해 생체정보를 모니터링 하고자하는 시도들이 이루어지고 있다. 본 논문에서는 U-헬스케어를 위한 무선센서네트워크기반의 소형, 경량의 온도 센서노드를 제작하고 패치 형태로 신체에 부착하여 사용자의 활동에 불편함이 없이 실시간으로 체온을 측정하고 모니터링하여 이를 활용할 수 있는 방안을 제시하였다. With the advancement of ubiquitous computing technology, u-Healthcare (i.e. ubiquitous health care), is regarded as a key application for information society, which provides health management service at anytime in anywhere. To implement U-Healthcare system, it is essential to monitor stable biological information in daily life. In this paper, we proposed a small size, light weight, patch type real time temperature monitoring system based on wireless sensor network (WSN) technology to monitor patients' body temperature without any inconvenience of activity.
김현중,양현호,Kim, Hyun-Joong,Yang, Hyun-Ho 한국정보통신학회 2010 한국정보통신학회논문지 Vol.14 No.10
최근 최첨단 IT 기술을 선도하는 USN은 사회 전반에 걸쳐 활용되고 있다. u-City, u-Home, u-Education, u-Farming 과 같은 다양한 USN 응용 서비스가 진행되고 있으며 도시를 지나 농촌에서도 유비쿼터스 기술이 '제 2의 농업 혁명'을 불러 오고 있다. 유비쿼터스 농업은 가축이나, 농작물 등의 생산 단계에서 USN 기술을 적용해 기온, 습도, 조도와 같은 생육 환경을 최적으로 조성하여 생산성과 안전성을 높이는데 있으며 기존 농업 환경에 많은 변화를 줄 수 있다. 본 논문에서 제안하는 이식형 소형 센서 노드는 센서 네트워크용 SoC(System-on-Chip)을 이용하여 설계하였으며 닭의 흉부에 이식하여 몸체의 체온을 직접적으로 모니터링 할 수 있도록 하였다. 또한 이를 이용한 여러 활용 방안 및 추가적인 고려사항에 대하여 논하였다. Recently, USN technology has been spreaded to all areas of application systems. In addition to urban application systems such as u-City, u-Home and u-Education, u-Farming(ubiquitous farming) technology supports agricultural innovations in the farm. In the u-farming environment for livestock or plant production, key environmental factors i.e. temperature, humidity and luminosity are to be set optimally to increase productivity and safety by applying USN technology. This approach could change agricultural environment. In this paper, we proposed an implantable micro sensor node to be implanted into laying hen to monitor deep body temperature. This sensor node uses SoC(System-on-Chip) designed for USN. In addition to that, we discussed about further considerations on the practical use of proposed sensor node.
유방에 발견한 원발신 악성 림프종의 세침흡인 세포학적 소견 - 1예 보고 -
김현중,이경화,김조헌,심민근,최찬,이지신,Kim, Hyun-Joong,Lee, Kyung-Hwa,Kim, Jo-Heon,Shim, Min-Keun,Choi, Chan,Lee, Ji-Shin 대한세포병리학회 2004 대한세포병리학회지 Vol.15 No.2
Lymphoproliferative disorders, manifesting either as a primary lesion or as part of a generalized process, rarely involve the breast. The primary malignant lymphoma of the breast is rare. The cytologic features of this neoplasm have not been reported in Korea thus far. We described a case of primary malignant lymphoma of the breast, as diagnosed by fine needle aspiration cytology (FNAC) in an 84-year-old female. FNAC smears showed high cellularity. The main cytologic feature observed was a carpeting of monotonous, atypical, enlarged lymphoid cells. These lymphocytes showed relatively round elliptical nuclei with some indentation. One or more prominent nucleoli were seen. Biopy from the breast mass revealed diagnostic features of non-Hodgkin's lymphoma, diffuse large B-cell type.
김현중,장소영,이은용,Kim, Hyun-Joong,Chang, So-Young,Lee, Eun-Yong 대한약침학회 2005 Journal of pharmacopuncture Vol.8 No.2
Objectives : This study was performed to examine effects of herbal acupuncture therapy on shoulder pain. Methods : Control group were treated by common acupuncture therapy and sample group were treated by common acupuncture therapy and herbal acupuncture therapy. We compared control group with sample group by VAS and ROM. Results : VAS of sample group were more decreased than control group. ROM of sample group were more improved than control group. Conclusion : The herbal acupuncture therapy may be good effects on the shoulder pain.
토목섬유로 보강한 흙 시료의 일축 및 삼축 압축거동 해석
김현중,김윤진,변성원,주창환,전한용,Kim, Hyun-Joong,Kim, Yoon-Jin,Byun, Sung-Won,Jo, Chang-Whan,Jeon, Han-Yong 한국섬유공학회 2009 한국섬유공학회지 Vol.46 No.3
In this study, the effects of geosynthetics reinforcements on compressive behaviors of weathered granite soils were investigated by uni-axial and tri-axial compression tests. Geogrid, geomat, and polyethylene slit film fiber were used as reinforced geosynthetis. From the experimental results, these geosynthetics reinforcement effects could increase the compressive strength of soil and especially, the reinforced effects of geogrid and geomat were extremely excellent compared to polyethylene slit film fiber reinforced. This effect is larger for 3 layer geosynthetics used. For triaxial compression test, despite unconsolidated undrained condition, it is seen that the increasing shear strength of the weathered granite soils is due to the increasing adhesive power.
일부 농업인에서의 농약 중독증상과 농약 사용정보에 대한 예비조사
김현중,차은실,문은경,고유선,김재영,정미혜,이원진,Kim, Hyun-Joong,Cha, Eun-Shil,Moon, Eun-Kyeong,Ko, You-Sun,Kim, Jae-Young,Jeong, Mi-Hye,Lee, Won-Jin 한국환경보건학회 2011 한국환경보건학회지 Vol.37 No.1
This study aimed to determine the feasibility of survey questionnaires for pesticide poisoning. We conducted a pilot study to develop a questionnaire for evaluating pesticide poisoning symptoms and to examine the validity of self-reported information for individual pesticides used. In December 2010 we interviewed 20 farmers with self-reported pesticide poisoning histories residing in Gyeonggi Province. For validity of pesticide information, the purchased pesticide lists from the agricultural cooperative federation were compared with individual self-reported pesticides used. Neurological symptoms were the most common among clinical symptoms related to pesticide poisoning, followed by gastrointestinal, dermal and eye symptoms. Insecticides were the main causative pesticide class for poisoning. Twenty one major symptoms were selected for screening for acute pesticide poisoning in a field study based on the pilot results and literature reviews. Substantial under-reporting was found in data on self-reported individual pesticides used (9.2%), as well as low accuracy (36%) compared with their actual purchase lists. In this pilot study, we suggest the selected symptom lists may apply to a field survey of pesticide poisoning. However, the self-reported information on individual pesticides may not be valid and alternative methods need to be developed.