성인에서 발생한 발진성 가성 혈관종증

서상희 ( Sang Hee Seo ),장호선 ( Ho Sun Jang ),목혜수 ( Hye Soo Mok ),김성준 ( Sung Jun Kim ),김병수 ( Byung Soo Kim ),김문범 ( Moon Bum Kim ),오창근 ( Chang Keun Oh ),권경술 ( Kyung Sool Kwon ) 대한피부과학회 2007 대한피부과학회지 Vol.45 No.8

Background: Eruptive pseudoangiomatosis (EPA) is a rare, benign, spontaneously regressing childhood exanthem. It is characterized by the sudden onset of several bright red angioma-like papules surrounded by pale halos with a distinct histopathology from true angiomas. Objective: This study was performed to evaluate the clinical and histopathologic characteristics of EPA occuring in adults. Methods: Ten adult patients who visited Pusan National University Hospital and Mok Hye-SooㆍJang Ho-Sun Dermatology Clinic from March 2005 to September 2006 were evaluated. We prospectively evaluated the sex, age, onset season, past medical history including immunosuppressive abnormalities, systemic disorders and other diseases including allergies. We also investigated the relations of mosquito biting, patients` occupations and outdoor activities to occurrence of EPA. In addition, simultaneous occurrence in family members, the clinical, histopathologic, laboratory findings, disease courses and responses to treatment were evaluated. Based on medical records, photographs and pathologic slides, we retrospectively diagnosed another 20 EPA patients suspected as insect bite from October 2003 to March 2005. The same questions were inquired as for the 10 patients who prospectively underwent evaluation. Results: In the study, female predominance (76.7%) was observed and the average age of onset was 54.2 years. Interestingly, there was no child patient during the period of study. Multiple, 2∼5 mm sized, red angiomatous papules surrounded by pale halos occurred on exposed areas such as the arms (86.7%), legs (50%), and face (46.7%), although it could also occur to a non-exposed area. EPA occuring in adults usually appeared in summer (80%). The mean disease duration was 3.4 weeks. Although EPA spontaneously regressed, it had the potential of recurrence (46.7%). Histopathologic findings showed dilated dermal blood vessels without the evidence of increase in numbers, and perivascular lymphocytes infiltration. Inside the lumen of dermal blood vessels, plump endothelial cells were found. Conclusion: EPA occuring in adults usually happened to exposed sites in summer, so it can be misdiagnosed as insect bite. We suggest that dermatologists should be concerned about EPA in adults and conduct further investigation to have a better understanding of the disease. (Korean J Dermatol 2007;45(8):797∼803)

알코올 발효성 야생 효모의 선발 및 발효특성

장재호*, 한상민*, 이종수 배재대학교 자연과학연구소 2017 自然科學論文集 Vol.28 No.1

충남 예당 저수지부근 토양에서 분리한 야생효모 중 Aureobasidium pullulans 효모가 가장 발효능이 우수하여 최종 선발하였다. 20% 포도당을 함유한 YPD 배지에서 Aureobasidium pullulans의 발효 최적 조건을 조사한 결과 에탄올 함량은 25℃에서 7일 발효시켰을 때 가장 많은 12.6 v/v%의 에탄올을 생성하였다. In order to select alcohol-fermenting wild yeast, among thirteen strains of non-pathogenic wild yeasts from Yedang Reservior, Chungnam province, Korea, Aureobasidium pullulans P-1 was screened as a potent alcohol-fermenting yeast. Optimal ethanol fermentation condition was investigated using 20% glucose- 1% yeast extract-2% peptone(20 DYP) broth. Maximal 12.6 v/v% ethanol was produced when 20% DYP broth was fermented by 5% Aureobasidium pullulans P-1 culture broth at 25℃ for 7 days.

편심 압축력을 받는 스테인리스 원형강관 기둥의 곡률형상에 따른 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold formed stainless steel CHS(circular hollow section) columns. The principal parameters in this study are slenderness ratios( λ=30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10㎝) on the direction of end moment. The direction of end-moment means 3 different bending moment distributions. Objectives this study are to obtain the maximum loads and moments by performing an experimental work and to compare the experimental behaviors with the design standard curves, AIK-LSD and AISC-LRFD, AIJ-LSD, SIJ-ASD curves. The ultimate buckling strengths and bending moments of circular section members are evaluated by a method in accordance with design standard curves. Therefore this paper attempts design standard for the use of these stainless steel columns as structural compression members. The numerically obtained ultimate buckling strengths and bending moments design standard curves of beam columns show a reasonably good agreement with the available experimental results.

축력과 양단 대칭모멘트를 받는 스테인리스 원형강관 기둥의 좌굴내력에 관한 실험적 연구

장호주,서성연,양영성 대한건축학회 2005 大韓建築學會論文集 : 構造系 Vol.21 No.3

This study is a series of experimental investigation on the buckling strengths of eccentrically compressed cold-formed stainless steel CHS(circular hollow section) columns. The principal parameters in this study are slenderness ratios(L_(k)/r = 30, 50, 70) and magnitude of eccentricity e(0, 2.5, 5.0, 7.5, 10㎝) on the symmetrical end moment. Objectives this study are to obtain the maximum loads by performing an experimental work and to compare the experimental behaviors with analytical results. The ultimate buckling strength of CHS members are evaluated by a numerical method in accordance with the axial force-bending moment(P-M) interaction curves. The behavior of each specimen is displayed in the form of moment angle(M- θ) relationship. The numerically obtained ultimate buckling interaction curves of beam columns show a reasonably good agreement with the available experimental results of slenderness ratios(L_(k)/r = 30, 50). But experimental results of slenderness ratios 70 were below M-P interaction curve.

SAN을 이용한 큐잉모델 해결방법

장경수,신호진,이상호,김병기,신동렬 成均館大學校 科學技術硏究所 2000 論文集 Vol.51 No.2

Queueing analysis, in general., has the intrinsic problem of large state space dimension and complex computation. In fact, the petri net is a graphical and mathematical model. It has been used for the modeling of various applications, in particular, manufacturing systems. It can deal with parallelism, concurrence, deadlock avoidance, and asynchronism. Currently it has been applied to the performance of computer networks and protocol verifications. This paper presents a technique for modeling and analyzing queueing model using stochastic activity networks (SANs). And then some examples are showed for the verification of the technique presented in this paper.

혈청 감마지티(gamma glutamyl transferase)치와 대사증후군의 연관성

장미,유병욱,조용진,오정은,홍성호,조주연 순천향의학연구소 2008 Journal of Soonchunhyang Medical Science Vol.14 No.1

Background: Serum gamma glutamyl transferase(GGT) level has been widely used as an index of liver dysfunction and a marker of alcohol intake. But, recently it is identified that the elevated GGT level was associated with insulin resistance. This study aimed to examine the association between metabolic syndrome and elevated GGT level in the women who had less alcoholic influence generally. Methods: From 585 women who received their annual health check-up, 577 women were selected for analysis except for 28 women who had hepatitis B surface antigen positive or antibody to hepatitis C virus positive, Categories of serum GGT were classified into four groups by quartile and then evaluated. Results: A abnormal GGT level(≥52U/L) was seen in 29(5.2%) of the 557 women. As GGT level increased, the prevalence rate of factors(body mass index≥25kg/m2, hypertension, hemoglobin≥14g/dL, total cholesterol≥220mg/dL, triglyceride≥150mg/dL, fasting plasma glucose≥110mg/dL, HDL-choles tero1<50mg/dL) except for hyperuhcemia was increased. The GGT level was correlated with age, body mass index, thglyceride and uric acid in women with fatty liver, but not in women without fatty liver. Factors independently contributing to elevated GGT level was diabetes, hyperthglycehdemia and obesity. Conclusion: The elevated, albeit normal, GGT level was strongly associated with the factors of metabolic syndrome in Korean women. Because measurement of serum GGT level is easy, reliable, and not expensive, it might have more important implication as predictive factor of metabolic syndrome.

천연가스 사용 난방 및 산업보일러의 NOx와 CO 배출계수 산정 연구

장영기,최상진,김관,송기봉,김호정,정봉진 한국대기환경학회 2004 한국대기환경학회지 Vol.20 No.5

This study was conducted for developing the emission factors of nitrogen oxide(NOx) and carbon monoxide (CO) from the combustion boilers burning liquefied natural gas (LNG). These emission factors were compared with those of U.S. EPA and European Environment Agency (EEA). NOx and CO concentration in the flow gas were measured using Kane-May, KM9106 and Thermo Environmental Instruments Inc., 42C-HL. Measurement were conducted at thirty industrial and commercial LNG boilers. Emission factors were calculated on the basis of fuel consumption (kg-pollutant/㎥-fuel burned). NOx concentration at industrial boiler was 14~125 ppm and it was measured as 35~125 ppm at commercial boiler. NOx emission factors of industrial boiler and commercial boiler were 1.84kg/㎥ and 2.09kg/㎥, respectively. NOx emission factor of commercial boiler was higher than that of industrial boiler. The NOx emission factors estimated in this study were lower than those of U.S. EPA and higher than those of EEA. Average CO emission factor of industrial boiler was 0.65 kg/㎥ and at commercial boiler it was 0.70kg/㎥, CO emission factor at industrial boiler was lower than that at commercial boiler.

개선된 Hopfield 신경망 모델을 이용한 A/D 변환기 구현

장종승,정영호,이상부,임영도 동아대학교 공과대학 부설 한국자원개발연구소 1993 硏究報告 Vol.17 No.2

Due to the rugged energy function of the original Hopfield networks, the output is usually one local minimum in the energy function. This paper an analysis on the location of local minima in Hopfield networks and discribes modified network architecture to eliminate local minima. This modified Hopfield networks has been successfully applied to the construction of analog-to-digital converter with optimal solutions. Experimental results on the voltage transfer characteristics of data converter is presented.

폐기물 성상과 매립방식에 따른 침출수 특성

성낙창,김은호,문추연,김정권,장성호,김수생,박출재 동아대학교 환경문제연구소 1996 硏究報告 Vol.19 No.1

In this study, we can be obtained the following conclusions about the characteristics of leachate with waste compositions and landfill methods. pH shows a tendency to increase in E. landfill, because NH₃ is created by anaerobic degradation and dissolved in leachate. The concentrations of BOD and COD become different, In case of E. landfill, food of combustible is H. & S. landfill and then SS is high in concentration. According to passed time, T-N is high in concentration, but T-P shows a similar tendency. Heavy metals of leachate is lower than threshold concentrations. If leachate is treated biologically, microbes are not inibitory.

수용성 키틴이 백서 창상치유에 미치는 영향

강장석,조용남,정상훈,유 결,임진수,권 호,조용우,고석원 大韓成形外科學會 2001 Archives of Plastic Surgery Vol.28 No.1