서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

강원도 화천군 수달(Lutra lutra) 서식지의 식생 구조

서형수 ( Hyung Soo Seo ),신영섭 ( Young Seob Shin ),이경은 ( Kyung Eun Lee ),김윤미 ( Yoon Mi Kim ),전미나 ( Mina Jeon ),남택우 ( Taek Woo Nam ),한성용 ( Sung Yong Han ),정연숙 ( Yeonsook Choung ) 한국하천호수학회 2014 생태와 환경 Vol.47 No.special

In order to determine whether vegetation would be one of the factors for the selection of otter home range, vegetation structure and other potential factors were studied in Hwacheon, Korea. Thirteen sites, otter’s activity found and not found, were investigated in North Han River and connected tributary streams of Hwacheon-gun. Three types of vegetation were classified by cluster analysis, which is short grass, tall grass and shrub type. Vegetation zone of each channel is composed of either one type, or mosaic of tall grass and shrub type. Short grass type is common in Lake Paro and upper North Han-river where water level is highly variable throughout a year. Therefore, annual species such as Persicaria nodosa, Fimbristylis dichotomam and Chenopodium ficifolium are the most dominant. Shrub type is common at the downstream sites of Jichon stream and along mainstream of North Han River down Lake Paro. A shrub species, Salix koreensis, is the most common. Tall grass type is dominant occupying the most vegetation zone of the tributary channels. Phragmites japonica is absolutely dominant. Due to its dense cover, a few plant species are co-existed. Otter activity was found in all three vegetation types and no marked activity was found at some sites of tall grass type. There is no difference in species composition and physiognomy between tall grass sites with and without otter activity, while it shows significant difference in fish availability between two groups. Overall we found that home range of otters in the region is along the mainstream and downstream of tributary streams with high fish availability in all vegetation types and in various human activity levels.

증산고령토를 이용한 경량건축자재 제조

한상목,윤창호,신대용,김상진 강원대학교 석재복합신소재제품연구센터 1997 석재연 논문집 Vol.2 No.-

저급의 점토질 원료인 증산 점토와 석탄폐석인 셰일를 이용하여 조성, 열처리 온도 및 열처리 시간 등의 반응인자를 변화하여 다공성의 경량건축자재를 제조하여 이들의 물리적 성질인 부피비중, 흡수율 및 기계적 강도를 측정하였다. 그 결과 증산점토 단일성분과 30wt%의 셰일을 첨가한 시편을 1200℃에서 30분간 급속가열하여 부피비중이 0.31g/cm³, 흡수율 1.0 % 및 압축강도가 69 kg/cm²인 다공성의 경량건축자재를 제조하였다. Suitability of low grade clay of Jungsan and shale as raw materials for light weight constructional material was examined. In order to find optimum manufacturing conditions with composition, heating temperature and heating time were varied and their effects on physical properties, such as bulk density, water absorption and mechanical strength were measured. The results obtained with a light weight constructional materials with one component of clay and 30wt% of shale added in clay heated at 1200℃ for 30 min, and the rapid-heating was more than the slow-heating for bloating. The light weight constructional material having bulk density of 0.31 g/cm³, water absorption of 1.03% and compressive fracture strength of 69 kg/cm² obtained.

철근콘크리트 보에 대한 CFRP의 정착길이

한상훈,최만용,조홍동,박중열,황선일 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

A failure mode in the beam strengthened with a high modulus plate appears as a interface debonding failure or ripping-off failure. This failure mode means that plate is separated from adhesive or concrete before displaying its own ability. Therefore, as a method for controlling a premature failure, it is need to use a general anchorage implement. We conducted bending tests for reinforced concrete beams strengthened with CFRP. The experimental variables were a concrete strength, reinforcement ratio, cover thickness of concrete and length ratio of CFRP for a pure span. A failure load, failure mode, load-deflection curve and strain response at different distances from a cut-off of CFRP and strain distribution curve were measured to determine the bond development length. Also, the bond development length was compared with Nguyen’s model and British Standard specification.

산업용 로봇의 3차원 오프라인 그래픽 시뮬레이터 개발

한성현,김종수,김용태 경남대학교 신소재연구소 1998 論文集 Vol.10 No.-

현재 대부분의 오프라인 프로그래밍(Off-Line Programming) 시스템은 그래픽사용자 인터페이스(Graphic User Interface)가 지원 가능하도록 만들어지는 추세이며, 지금까지 개발된 대부분의 오프라인 프로그래밍 시스템은 워크스테이션에서 운용되어야 하고, 고가인 관계로 아직까지 보편화되지 못한 상태이다. 이에 본 연구에서는 스카라형 로봇에 대한 3차원 그래픽 시뮬레이터인 오프라인 프로그래밍 시스템을 현재 일반 PC의 OS인 Windows 94 버전으로 개발하였다. 전용 로봇 모델은 삼성 스카라 로봇 SM5를 사용하며, 이 로봇에 대한 정기구학, 역기구학 해석을 프로그램에 이식하였으며, 로봇의 동역학을 모델링하여 프로그램에서 모의실험이 가능하게 하였다. Windows 95의 그래픽 유저 인터페이스 환경을 이용한 사용자와 오프라인 프로그래밍 시스템의 인터페이스에 대하여 연구하였으며, 적절한 궤적 계획과 제어방식 선택이 가능하도록 구성되어 있다. 개발 언어로는 Microsoft 사의 Visual C++을 사용하였다. In this paper, we developed a Windows 95 version Off-Line Programming System which can simulate a Robot model in 3D Graphics space. 4 axes SCARA Robot (especially FARA SM5)was adopted as a n objective model. Forward kinematics, inverse kinematics and robot dynamics modeling were included in the developed program. The interface between users and the OLP system in the Windows 95's GUI environment was also studied. The developing language is Microsoft Visual C++. Graphic libraries, OpenGL, by silicon Graphics, Inc. were utilized for 3D Graphics.

한국 재래 산양에서 Leptospira spp.에 대한 혈청역학적 연구

한동운,권용국,문진산,윤소라,위성환,장환,탁동섭,이태욱,강문일 한국수의공중보건학회 2003 예방수의학회지 Vol.27 No.3

Between January 1999 and September 2001, 948 sera (120 from each province except 108 from Chungbuk) from 8 provinces were sampled from Korean goats. All the samples were serologically tested for Leptospira spp. By the microscopic agglutination test against four L. interrogans serovars including canicola, icterohaemorrhagiae, pomona and hardjo, 948 Korean goats were confirmed as 11 seropositives (1.2%) only infected with L. icterohemorrhagiae. All positive sera were collected from Gyeonggi (5), Gangwon (4) and Chungbuk (2). Titration of them were classified as 1:100 of 10 sera except one case with 1:200 from Gyeonggi. It was meaningful that the pathogen in Korean goats was mainly distributed in the northen part of the country. Consequently, the results in the study were confirmed and analyzed the recent status of infection of leptospirosisas zoonotic agentsome in Korean goats.

당뇨병환자에서 뇨증 Fibronectin농도의 증가에 관한 연구

한승범,조준승,손건영,서성문,박근용,조성래,박규영,박정모,이인규,여준기 啓明大學校 醫科大學 1994 계명의대학술지 Vol.13 No.4

Plasma fibronectin is an α₂-glyoprotein, which is produced by vascular endothelial cells. Raised level of plasma fibronectin has been observed in diabetic patients particularly in the presence of microvascular complications. However, no available data exist about urine level of this glycoprotein in diabetic patients. We measured urine fibronectin level by ELISA methods in 54 diabetic patients who have microvascular comlications or not. The following results were obtained. 1) Urine fibronectin level(㎍/g creatinine) in diabetic group(1740.0±678.0) is increased compaired with those in normal control group(471.0±59.0). but this results were not significantly different among two groups(P>0.05). 2) Urine fibronectin level(㎍/g creatinine) was significantly increased in patients with nephropathy (6188.0±3144.0) compared with those in normal control group(471.0±59.0) and patients without nephropathy(645.0±251.0)(P<0.001). 3) There were a significant correlation between BUN, creatinine, creatinine clearance, 24hr urine total protein and urine fibronectin level in diabetic patients. Our data suggest that urine fibronectin excretion level might be used as a sensitive guide for diabectic nephropathy.

탄소섬유보강판의 홈삽입에 따른 철근콘크리트 보의 보강효과

한상훈,최만용,조홍동,박중열,황선일 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.1

This paper presents a feasibility study of an alternative strengthening method by slot-bonded CFRP plates for reinforced concrete beam. A total 14 reinforced concrete beam were constructed, tested and the response of the beams in terms of deflection, strains, failure load and failure mode were examined. Each specimen was initially loaded for 75% of ultimate load, cracked specimen were strengthened with CFRP plate and then tested until complete failure. Test variables included the strengthening method, steel ratio and strengthening length, and the effects according to each test variables are analysed. The experimental results show that proposed methods can increase the flexural strength and stiffness of the beam significantly. Also, the failure of the specimens strengthened by the proposed method are more ductile than externally bonded specimen.

헬리코박터 파이로리 균 진단용 ^13C-요소 캅셀의 개발

용철순,김용일,김지만,강성훈,권기철,이종달,김종국,사홍기,최한곤 영남대학교 약품개발연구소 2002 영남대학교 약품개발연구소 연구업적집 Vol.11 No.-

The purpose of this study was to develop a new ^13C-urea-containing capsule for diagnosis of H.pylori. The urea-containing capsules were prepared with various diluents such as polyethylene glycol (PEG), microcrystaline cellulose, sodium lauryl sulfate and citric acid. The dissolution test, ^13C-urea breath test and stability test were then performed on the capsules. Microcrystalline cellulose and sodium lauryl sulfate retarded the initial dissolution rates of urea. However, PEG increased the initial dissolution rates of urea. Furthermore, two formulae composed of PEG,[^13C-urea/PEG (38/1.9 mg/cap)] and [^13C-urea/PEG (38/1.9/1.9 mg/cap)] had the maximum DOB value. about 16 at 20 min, while the formula composed of only 38 mg ^13C-urea had the maximum DOB value at 30 min. The results indicated that PEG improved the sensitivity of ^13C-urea in the human volunteers. The capsule [^13C-urea/PEG (38/1.9 mg/cap)] was stable for at least six months in 25 and 37℃. Thus, a PEG-containing capsule, [^13C-urea/PEG (38/1.9 mg/cap)] would be a more economical, sensitive and stable perparation for diagnosis of H. pylori.

코디어라이트-Al_2TiO_5계 원적외선 방사체 제조

한상목,신대용 강원대학교 부설 석재복합신소재 제품연구센터 2000 석재연 논문집 Vol.5 No.-

Al_2TiO_5의 첨가량과 열처리 온도가 증가함에 따라 Al_2TiO_5상이 증가하였으며 Al_2TiO_5의 분해가 억제되었다. 1200℃의 열처리시 cordiertite와 Al_2TiO_5이외에 spinel과 mullite가 존재하였으며 1,250℃에서 spinel상은 감소하였으며 cordierite, Al_2TiO_5 및 mullite의 상이 증가하였다. 9CA 복합체는 1200℃에서 cordierit가 생성되었으며, 첨가량이 20wt%이상인 CA 복합체는 1300℃에서 cordierite가 생성되어 Al_2TiO_5의 첨가량이 증가함에 cordierite의 생성온도가 증가하였다. Cordierite 원료 조합물을 1,350℃로 열처리하였을 때 cordierite의 합성이 가능하였으며, Al_2TiO_5의 첨가량과 열처리 온도가 증가함에 따라 부피비중과 3점곡강도는 증가하였으나, 겉보기기공률과 흡수율은 감소하였다. 9CA 복합체를 1,200℃에서 열처리 하였을 때 부피비중 2.45 g/㎤, 겉보기기공률 0.25%, 흡수율 0.21% 및 155 MPa의 3점곡강도를 나타내어 coirdierite의 생성온도가 200℃ 감소되었다. Al_2TiO_5의 첨가량이 30wt%까지 복합체의 3점곡 강도는 증가하였으나, 첨가량이 30 wt%에서 40 wt%로 증가함에 따라 Al_2TiO_5의 열팽창계수의 이방성에 의한 미세균열이 발생하여 3점곡강도가 감소하였다. CA복합체는 Al_2TiO_5의 첨가량이 증가할수록 이력곡선의 면적과 평균열팽계수도 증가하였다. 1,200℃에서 3시간 열처리한 9CAC 복합체의 평균열팽창계수는 2.56×10^-6/℃, 1300℃에서 3시간 열처리한 7C3A 및 5C5A 복합체는 3.5210^-6/℃와 4.12×10^-6/℃를 나타내었다. Thermal properties of cordierite-Al_2TiO_5 composites of infrared radiator have been investigated as a function of Al_2TiO_5 additives(x=10~50 wt%). The emittance of composites containing 10% wt% Al_2TiO_5 heated at 1,200℃ for 3 hr, the emittance was about 0.3 and 0.92 in the ranges of 3,400~2,500 cm^-1 and 2,500~400cm^1, respectively. Compared with cordierite monolithics a substantial increase of sintering temperature range for composites was observed, which was due to the formation of cordierite and glass phase at relatively ow temperatures. The bulk density of the cordierite-Al_2TiO_5 composites increased with incresing Al_2TiO_5 content. The bending strength of composites showed its maximum at 30 wt% Al_2TiO_5 content, then decreased by a small amount at 40 wt% Al_2TiO_5 content. However, the microcracks formed was not serve enough to produce a significant decrease in strength, which was also evidenced by the continuous increase of thermal expansion coefficient up to 40 wt% Al_2TiO_5 content. 90 wt% cordierite-10 wt% Al_2TiO_5 composite heated at 1,200℃ had an adequate strength for infrared radiators; 155MPa. The degree of thermal expansion hysteresis increased with increasing Al_2TiO_5 content and the mean thermal expansion coefficient increased with increasing Al_2TiO_5 content. The thermal expansion coefficient of 90wt% cordierite-10 Al_2TiO_5 composite heated at 1,200℃ was 2.56×10^6/℃.