수동식 시료채취기를 이용한 사무실 직장인의 이산화질소 노출평가 및 예측 : 한국의 서울과 호주의 브리스베인 비교 연구 Comparative Study of Seoul in Korea and Brisbane in Australia

양원호,손부순,김종오 한국환경과학회 2002 한국환경과학회지 Vol.11 No.3

Indoor and outdoor nitrogen dioxide (NO_2) concentrations were measured and compared with measurements of personal exposures of 95 persons in Seoul, Korea and 57 persons in Brisbane, Australia, respectively. This activity diary was used to determine the impact on NO_2 exposure assessment and microenvironmental model to estimate the personal NO_2 exposure. Most people both Seoul and Brisbane spent their times more than 90% of indoor and more than 50% in home, respectively. Personal NO_2 exposures were significantly associated with indoor NO_2 levels with Person coefficient of 0.70 (p<0.01) and outdoor NO_2 levels with Person coefficient of 0.66 (p<0.01) in Seoul and of 0.51 (p<0.01) and of 0.33 (p<0.05) in Brisbane, respectively. Using microenvironmental model by time weighted average model, personal NO_2 exposures were estimated with NO_2 measurements in indoor home indoor office and outdoor home. Estimated NO_2 measurements were significantly correlated with measured personal Exposures (r = 0.69, p<0.001) in Seoul and in Brisbane (r = 0.66, p<0.001), respectively. Difference between measured and estimated NO_2 exposures by multiple regression analysis was explained that NO_2 levels in near workplace and other outdoors in Seoul (p = 0.023), and in transportation in Brisbane (p = 0.019) affected the personal NO_2 exposures.

Secure IPv6를 위한 TSP 기반 터널 브로커 설계 및 구현

양종원,이창원,서창호 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-

The TB(Tunnel Broker) constructs the exclusive Server and manages user's tunnel request automatically. This concept is useful in that you can simulate host increase of the IPv6, or you can approach the IPv6 network easily. The existing TB(Tunnel Broker), however, is week in the attack against the network resources and a service of the existing users by users of malice. In order to overcome the protection problem of the existing tunnel broker, I propose IPv6 TB(Tunnel Broker) based on TSP(Tunnel Setup Protocol). Clients and Tunnel Broker communicate each other with cryptography when they transmit or receive XML message on the basis of S-HTTP(Secure HTTP) rather than HTTP. Finally, Clients and Tunnel Sever(TS) convert important information in cipher by using IPsec.

하계 실내 및 실외환경의 공기 중 휘발성 유기화합물 농도 및 개인노출

양원호,손부순,박종안,장봉기,박완모,김윤신,어수미,윤중섭,류인철 한국환경과학회 2003 한국환경과학회지 Vol.12 No.9

Volatile organic compounds (VOCs) are present in essentially all natural and synthetic materials from petrol to flowers. In this study, indoor and outdoor VOCs concentrations of houses, offices and internet-cafes were measured and compared simultaneously with personal exposures of each 50 participants in Asan and Seoul, respectively. Also, factors that influence personal VOCs exposure were statistically analyzed using questionnaires in relation to house characteristics, time activities, and health effects. All VOCs concentrations were measured by OVM passive samplers (3M) and analyzed with GC/MS. Target pollutants among VOCs were Toluene, o-Xylene, m/p-Xylene, Ethylbenzene, MIBK, n-Octane, Styrene, Trichloroethylene, and 1,2-Dichlorobenzene. Indoor and outdoor VOCs concentrations measured in Seoul were significantly higher than those in Asan except Ethylbenzene. Residential indoor/outdoor (I/O) ratios for all target compounds ranged from 0.94 to 1.51 and I/O ratios of Asan were a little higher than those of Seoul. Relationship between personal VOCs exposure, and indoor and outdoor VOCs concentrations suggested that time-activity pattern could affect the high exposure to air pollutant. Factors that influence indoor VOCs level and personal exposure with regard to house characteristics in houses were building age, inside smoking and house type. In addition insecticide and cosmetics interestingly affected the VOCs personal exposure. Higher exposure to VOCs might be caused to be exciting increase and memory reduction, considering the relationship between measured VOCs concentrations and questionnaire (p<0.05).

백두대간(추풍령-덕유산)구간의 식물상

한종원, 양선규, 최슬기, 장창석, 오병운 忠北大學校部設基礎科學硏究所 2007 自然科學硏究 Vol.21 No.-

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肝吸蟲 感染家兎에 있어서 感染强度, 經過 및 治療에 따른 ELISA抗體價의 變動에 관한 實驗的 硏究

梁元容,李駿商,林漢鍾 고려대학교 의과대학 1984 고려대 의대 잡지 Vol.21 No.3

Human clonorchiasis is one of the most common trmatode diseases and of very important pubic health problems in Korea. In the present study, the changing patterns of specific IgG antibody was demonstrated by the enzyme-linked immunosorbent assay(ELISA) in the sera rabbits infected with clonorchis sinensis. The O.D> (optical density) values of the ELISA in the sera were merwured according to intensity and course of infections and tendency of decrease after chemotherapy. The ELISA was performed with veronal buffered saline antigen of clonorchis, peroxidase conjugated antirabbit IgG and ortho- phenylendiamine as a substrate by micro method. In the 3 groups of rabbits infected with 50(A group), 500(B group) or 100×5(C group) metacercariae, the sera were prepared biweekly up to 18th week before chemotherapy, and biweekly up to 24th week after chemotherapy. The results were as follows: 1. O.D. values increased gradually with lapse of time before treatment. The O.D. values indicated firstly 1.000 or more in 8 weeks after infection in A group and 4 weeks after infection in both B and C groups. The O.D. values reached plateau at 10 weeks after infection in A group and 8 weeks after infection in both B and C groups. Regression equations between the O.D. values of the ELISA and period(week) after infection among 2 groups were as fllows, y=0.09x+0.319 in A group y=0.08x+ 0.826 in B group and y=0.08x+0.807 in C group. 2. The O.D. values in A group which had been treated decreased gradually and became preinfection level at 24 weeks after chemotherapy. On the contrary the O.D. values in A group which has not been treated showde plateau. The O.D. values in both B and C groups which had been cured decreased gradually and became preinfection level at 24 weeks after chemotherapy.

수소손상 검출과 평가기술

원순호,현양기,이종오,조경식,이재도 한국비파괴검사학회 2002 한국비파괴검사학회지 Vol.22 No.1

산업현장에서 수소는 설비를 손상시킬 수 있는 주원인 중의 하나이며, 종종 설비를 파괴시키는 사고를 발생시킨다. 수소손상에 의한 결정립계의 공동 또는 미세균열은 강재의 파괴인성과 강도를 떨어뜨리는 원인이 되고, 따라서 과거 제한적인 방법으로 수소손상을 평가하기 위한 시도가 수행되었다. 본 연구에서는 초음파를 적용하여 수소손상을 검출하고 평가하기 위한 연구를 수행하였다. 미세조직시험에 의해 확인된 시험편을 이용하여 초음파의 속도와 감쇠계수를 구한 결과, 수소손상에 의해서 초음파 속도는 감소하고 감쇠는 현저하게 증가하는 것으로 나타났다. 이러한 결과를 바탕으로 수소손상을 검출하기 위한 신뢰성 있는 평가법을 제시하였다. The presence of hydrogen in industrial plants is a source of damage. Hydrogen attack is one such form of degradation and often causing large tube ruptures that necessitate an immediate shutdown. Hydrogen attack may reduce the fracture toughness as well as the strength of steels. This reduction is caused partially by the presence of cavities and microcracks at the grain boundaries. In the past several techniques have been used with limited results. This paper describes the application of an ultrasonic velocity and attenuation in hydrogen damage. Ultrasonic tests showed a decrease in wave velocity and an increase in attenuation. Such results demonstrate the potential for ultrasonic nondestructive testing to quantify damage. Based on this study, reliable recommendation is suggested to detect hydrogen attack.

부가채널공격을 고려한 타원곡선 연산 H/W 구현 방안

양종원,이창원,서창호 公州大學校 工學硏究院 生産技術硏究所 2004 論文集 Vol.12 No.-

암호 알고리즘이 장착된 하드웨어를 통한 신뢰할 수 있는 보안 서비스를 제공하기 위해서는 부가채널공격에 대한 이해와 이에 대비한 암호 알고리즘이 개발이 필수적이다. 본 논문에서는 타원곡선 연산 H/W 설계하기 위해 부가 채널에 안전한 공격 방법에 대해서 살펴 본다. 또한 효율적인 RSA 암호 알고리즘을 구현하기 위해서 몽고메리 알고리즘의 정확한 분석을 포함하여 성능 개선을 위한 구현 방법을 정립했다. ECC(Elliptic Curve Cryptography)는 소인수분해 난제를 이용하는 RSA 암호 기법과는 다르게 타원 곡선에서의 이산 대수 해결 난제를 이용한 암호 기법으로, RSA에 비해 적은 키 길이로서 동등한 안전도를 제공한다. 그리고 타원곡선의 효율적인 측면에서 구현 몯ㄹ에 관한 연구하였으며, 타원곡선 스칼라 곱셈 알고리즘이 부가 채널 공격인 시차 공격과 전력 분석 공격에 안전하기 위한 일반적인 조건과 H/W 구현 방안에 대해 제시한다.

URC용 지능형 웹 서비스 기반 템플릿 저작 도구 구현

양종원,김원주,서창호 公州大學校 工學硏究院 生産技術硏究所 2005 論文集 Vol.13 No.-

본 논문에서는 웹상에 존재하는 데이터를 로봇과 접목하여 이용 할 수 있는 네트웍 기반의 언제 어디서나 나와 함께 하며 나에게 필요한 서비스를 제공하는 지능형 서비스 로봇인 URC(Ubiquitous Robotic Companion)[1] 개념을 기본으로 한다. 또한 STDL(Service Template Description Language)을 기반으로 URC 용 서비스 템플릿 생성, 추가, 삭제, 수정 등의 기능뿐만 아니라 서비스 템플릿 리소스들에 대한 그래필 한 처리 기능을 제공한다. 서비스 템플릿 과정에서 사용자 편의적인 환경 제공을 위해 플로우 뷰 스타일, 그리드 뷰 스타일, 텍스트 뷰 스타일 등의 편집 환경을 구현했으며, 또한 실제 로봇 구동에 필요한 로봇API를 참조하고 이를 기반으로 추상 서비스 블록을 구체화하여 서비스 템플릿을 쉽게 작성할 수 있는 기능을 제공하게 된다.

수평거리에 따른 요배근력과 척추기립근의 근전도 변화

양성환,김종인,최정화,박범,갈원모 설비관리학회 2001 설비관리학회 학술논문집 Vol.7 No.-

This study evaluated the compression force at the L5/S1 disc using back strength and IEMG(Integrated Electromyography). We divided the distance into one-half, three-fourth and full, measured the back strength. The results showed significant difference much among the cases. IEMG values were analyzed under the condition of fixed vertical factor, two horizontal factors, and 2 times per minute for the stoop posture, As the result, there are significant differences between horizontal distance 35cm and 55cm. This result showed that back strength decreased and the motor units of erector spinae muscle increased as the horizontal distance increased. Therefore, decreasing the horizontal distance to decrease compression force at L5/S1 is important on preventing a low back pain. Also. by using these data for prediction musculoskeletal disorders if we design equipment, machine and apparatus for human welfare, we can give advantage of prevention of low back pain much. We will be able to apply these data to work method or workplace lay-out.

수액 세트의 Drip Chamber를 이용한 상부소화관의 이물 제거 1예

서종훈,양미진,이진성,이상호,김정원 고신대학교 의과대학 2010 고신대학교 의과대학 학술지 Vol.25 No.2

In the upper gastrointestinal tract, in particular, there are parts consisting of esophageal sphincter muscles to carry out physiologic functions, which causes impairments when removed, as well as such complications as mucosal injuries, bleeding and even perforations in the case of foreign bodies with large size and/or sharp angles. Therefore, it is essential to use an appropriate type of supplementary instrument for a safe procedure. Frequently utilized supplementary instruments are overtube, protector hood, latex glove and transparent cap. We report a case in which authors were successful in removing a watch bend consisting of metal ring from gastric body while using a modification of a widely available drip chamber of fluid set attached to vertical end of endoscopic device.