Formaldehyde 露出에 關한 調査硏究

金亨錫,朴良元 慶熙大學校 1980 論文集 Vol.10 No.-

Formaldehyde. HCHO, is chemical used in numerous industrial operations involving the manufacture, commercial distribution. and production of a variety of products. We can feel the odor of formaldehyde in textile selling places with great discomfort of eye irritation when we visit markets. Authors investigated the formaldehyde content in the East gate and South Gate market and got the following results; the formaldehyde concentration were between 0.0143-0.1982 ppm(mean; 0.0951 ppm) when we surveyed on June and July, 1980.

미국 EPA QC試料中 PCB 測定에 關한 硏究

金亨錫,朴良元 慶熙大學校 醫科大學 1983 慶熙 醫大 論文集 Vol.8 No.1

Flattening class hierarchy for reorganization of object-oriented software

황석형,양해술,박정호 한국정보처리학회 2001 정보처리논문지 Vol.8-d No.6

최근의 객체지향 소프트웨어개발에서는 설계 및 유지보수와 관련된 많은 문제점들을 해결하기 위하여 클래스를 재설계하거나 클래스계층구조를 재구성하는 등 객체지향 소프트웨어에 대한 일련의 재이용 및 재구성기법이 사용되고 있다. 본 논문에서는 클래스계층구조의 재구성에 관한 정형적인 이론을 제공함으로써 클래스계층구조의 재구성에 e관하여 보다 수월하게 이해하고 적용할 수 잇도록 하였다. 구체적으로 본 논문에서는 객체지향 소프트웨어의 개발에 있어서 주요 골격이 되는 클래스계층구조를 평탄화시킨 형태로 정의한 평탄화된 클래스계층구조를 소개하고, 임의의 클래스계층구조를 평탄화된 형태로 변형시키기 위한 알고리즘을 제안하였다. 클래스계층구조를 평탄화함으로써 클래스계층구조상의 계승 및 집약관계가 각 인스턴스들에게 어떻게 사상되는가를 수월하게 파악할 수 있으며, 주어진 클래스계층구조로부터 생성가능한 객체를 그대로 유지보존할 수 있는 평탄화된 형태의 새로운 클래스계층구조를 구축할 수 있다. 평탄화된 클래스계층구조는 클래스계층구조를 재구성하여 객체지향 소프트웨어를 점증적으로 변화 발전시키거나 재이용함에 있어서 기초를 제공하는 등 중요한 역할을 수행한다. In the object-oriented software development, redesigning of classes and reorganizing of class hierarchy structures should be necessary to reduce many of the headaches of object-oriented software design and maintenance. To support this task, in this paper, we propose a theoretical foundation for class hierarchy reorganizations that is relatively complete, correct, formal and easy to understand and use. We introduce the flattened class hierarchy that characterizes the clan, hierarchy structures in object-oriented software evolution. And we also present an algorithm which transforms a given class hierarchy into the normalized form. The flattened class hierarchy helps us map the inheritance and aggregation paths in a class hierarchy to paths in an object hierarchy that is an instance of the class hierarchy. By applying the algorithm into a given class hierarchy, we can make a new, object-preserved, and flattened class hierarchy that is the cornerstone for reorganization of class hierarchy structure and plays an important role as a bridge on the incremental evolutionary changes and reuse of object-oriented software to reorganize class hierarchies.

대황황련해독탕의 항고지혈증 작용

김영석,정은아,장종철,양형길,김남재,조기호,배형섭,이경섭,김동현 경희대학교 동서의학연구소 2001 東西醫學硏究所 論文集 Vol.2001 No.-

Whangryunhaedok-Tang (WT) is formulated with Coptidis Rhizoma, Phellodendri Cortex, Scutellariae Radix and Gardeniae Fructus, and Daewhang-whangryunhaedok-Tang (DWT) is made by the combination of Rhei Rhizoma, a wellknown anticostipation drug in WT. Therefore, DWT has been evaluated for antihyperlipidemic effects on experimental hyperlipidemic rats and mice induced by corn oil and high cholesterol-diet. Oral administration of DWT significantly inhibited the increase of serum triglyceride and LDL-cholesterol levels, and the decrease of serum HDL-cholesterol levels in hyperlipidemic rats induced by corn oil. Also, oral administration of DWT significantly prevented the increase of serum total cholesterol, triglyceride and LDL-cholesterol, and liver total cholesterol and triglyceride in 1% cholesterol-diet fed mice. These results suggest that DWT is effective for the treatment of hyperlipidemia.

최근 10년간 원광의대병원에서 시행한 소아 심장혈관 수술의 임상적 고찰

윤향석,정수미,최두영,오광수,오연균,김종덕,양현웅,이삼윤,김형곤,최종범,최순호,노병석 圓光大學校 醫科學硏究所 1995 圓光醫科學 Vol.11 No.2

We reviewed 10 years experiences of the clinical aspects and early postoperative results in 544 pediatric patients(age less than 16 years old). Among them. 529 cases had the congenital heart diseases, and 15 had the acquired diseases. Open heart surgery was performed in 413 patients. 115 cases were treated with non-open heart surgery. 16 with interventional catheterization. Annual increase of the cardiac patients was not significant in recent 10 years, except slight increase in 1994. The mean age of the study patients had been evidently changed to younger year by year. Total mortality rate of the open heart surgery was 6.4%. The cyanotic congenital heart diseases were high in early postoperative mortality by 25.7%, whereas 4% in acyanotic group. The age group less than one month was most highest in surgical mortality(66.7%). There were no deaths in patients with patent ductus arteriosus(103 cases), atrial septal defect(83 cases) or pulmonary stenosis(17 cases). Among 220 patients with ventricular septal defects(VSD). 10(4.5%) were died early postoperatively. In cyanotic group, the patients with pulmonary atresia with ventricular septal defects(PAVSD), transposition of the great arteries(TGA), interrupted aortic arch(IAA), complex cardiac anomalies with isomerism seemed to be most susceptible to an early death.

대황황련해독탕의 사염화탄소 유발 간장해 보호효과 미치 급성독성

김영석,정은아,장종철,양형길,김남재,조기호,배형섭,이경섭,김동현 WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2002 東西醫學硏究所 論文集 Vol.2002 No.-

ABSTRACT - This study was performed to evaluate hepatoprotective effect of daewhang-whangryunhaedok-Tang(DWT) on liver injured rats induced by CCI_4 and the acute oral toxicity of it in mice. The activities of serum transaminase(ALT/AST), alkaline phosphatase(ALP) and lactic dehydrogenase(LDH), the levels of serum total cholesterol(TC) and triglyceride(TG), change of liver enlargement, and inhibitory activities of lipid perotidation, catalase and glutathione-S-transfrease(GST) in liver microsome were determined in hepatotoxic rats induced by CCI_4. DWT was significantly reduced the serum ALT, AST, ALP, LDH. TC and TG lecels. And, the increase of lipid peroxidation, decrease of catalase and GST activities in the liver microsome of CCI_4-intoxicated rat were significantly improved by the treatment of DWT. Male and female mice were administered maximum dosages of 5.000 mg/kg b.w. of DWT. After single oral administration of DWT to mice, we observed them daily for 2 weeks.DWT did not induce any toxic signs in the mortalitie, clinical signs, body weight changes, and gross necropsy finfings of mice. Based in these results. It is concluded that DWT may have the hepatoprotective effect on CCI_4 induced hepatotoxicity in rats. Also. DWT may have no side effect and its LD_50 value may be over 5.000mg/kg b.w. in mice.

미용사의 소화불량에 관한 조사 연구

곽형심,김양순,김은숙 한국미용학회 2001 한국미용학회지 Vol.7 No.3

This study was performed from mid-July to late August of 2000 in Daegu Metropolitan City with the sample of 373 female hair dressers. The objectives of this study are to examine the correlation between hair dressers indigestion experience and relevant factors and to provide with a basic information for preventing their health problems. The survey was conducted through self-administrated questionnaires 1. For their general characteristics, respondents aged between 20 and 24 years accounting for the highest percentage (129persons/34.60%). The unmarriaged persons are 259 (69.40%). In terms of education, 256 of the respondents (68.60%) had at less high school education. 2. For their indigestion experience, 93.33% of them are aged between 30-34 years accounting for highest percentage. There is statistical relation (p<0.01) For their carreer, 62.22% of the them, between 1 years and less 3 years are accupying the highest percentage. And There is statistical relation (p<0.05) For their working hours, over I I hours workers are 95%. There is statistical relation(p<0.001) 3. For their lifestyle, an irregular life was 36.24%. And an irregular mealtime was 33.33% There are statistical relations (p<0.01). Over eating was 37.50%. But There was no statistical relation. For their health status, smoking (p<0.05) was statistical relation. But drinking, movement was no statistical relation. 4. For their having a meal, during 10-14 minutes are 82.07%. There was no statistical relation. Amon lunch time, 13-14pm is 75.32%. There is statistical relation(p<0.01) Between habbit and indigestion are no statistical relation.

Ion Chromatograph에 의한 음료수중 Na^+, NH_4^+, K^+의 검출에 관한 연구

김형석,전준배,박양원 慶熙大學校 1987 論文集 Vol.16 No.-

We should drink 2-3L of the clean potable water per day to maintain our life in good condition. According to the population increase and industrialization, the water quality of the city drinking water have some problems, and the contamination of the ground water and surface water are threatening the water resources. In the analysis of the drinking water, U.S. Standard method and other several methods have been used. But recently the ion chromatography. Which could analyze anion and cation within few minutes, has developed and are using in water analysis in developed countries. Author tried to analyze monovalent cations by using single column ion chromatograph method with conductivity detector. The retention time of the Na, NH_4, and K ions are 2.62, 3.05, and 3.29 minutes under the condition of the Ion-200 Cation column(Interaction)with 10mM isonicotinic acid(pH 2.7) eluent. By using the 25ppm standard solution the relative standard deviation was within 5.0%

루우버핀형 열교환기의 열전달 특성에 관한 연구

현동수,양형석 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

To investigate the influence of fin space and shape of a heat exchanger on the argumentation of heat transfer efficiency, we make models of a plate fin type and a louvered fin type heat exchanger which was given a transformation of fn space in plate fin type and levered fin type heat exchangers which are often used now, And the influence of fin space on the flow and the characteristics of heat transfer was measured and analysed with variable of air velocity and temperature of plate heating. The results of experiment shows as belows. Mean heat transfer coeffcient(h)shows higher value in louvered fn type heat exchanger than in plate fin type heat exchanger, size of mean heat transfer coefficient with fin space shows same in both case in louvered and plate fin type heat exchanger like this oreder that fin space in 5㎜, 6㎜, 4㎜. When the temperature difference(ΔT) being between 4℃ and 16℃ mean heat transfer coefficient rised till 8℃ afterward falls, size of mean teat transfer coefficient by fin space shows like this order that fin space is 6㎜, 6㎜, 4㎜. Pressure drop shows larger in louvered fin type heat exchanger than in plate fin type heat exchanger, size of pressure drop(??P) shows like this order that fin space is 4㎜, 5㎜, 6㎜. Mean heat transfer coefficient per unit pressure drop (h/??P) shows higher in louvered fin type heat exchanger than in plate fin type heat exchanger, size of mean heat transfer coefficient per unit pressure drop by fin space shows like this order that fin space is 5㎜, 6㎜, 4㎜.

개발산출물의 신뢰성 측정을 위한 메트릭스의 제안과 평가

이하용,황석형,양해술 한국정보처리학회 1998 한국정보처리학회 추계 학술발표논문집 Vol.4 No.1

소프트웨어는 갈수록 대규모화, 다기능화되는 방향으로 발전하고 있다. 더불어 소프트웨어에 관한 사용자의 요구 수준도 높아지고 있으며 특히 소프트웨어의 품질에 대한 요구는 지속적으로 높아지고 있다. 이러한 사용자의 요구를 만족시킬 수 있는 방안들이 다양한 관점에서 연구되고 있다. 그중에서도 소프트웨어의 품질평가를 통해 그 결과를 개발자에게 피드백함으로써 소프트웨어의 품질을 향상시키려는 관점에서 품질평가 체계 및 방법론에 대한 연구가 활발히 진행되고 있다. 본 논문에서는 소프트웨어의 품질에 관한 국제표준인 ISO/IEC 9126의 품질특성 중 신뢰성에 대한 품질특성, 부특성, 내부특성의 체계에 따른 메트릭스와 품질측정표를 개발함으로써 관련 내부특성의 품질평가를 통해 신뢰성에 대한 평가 결과를 산출할 수 있는 체계를 확립하고 개발산출물에 대해 평가한 결과를 제시하였다. α,ω-Bis[Co₂(CO)6{μ-η²:η²-C(R)≡C}]oligothiophene derivatives (6-10), in which two dicobalt hexacarbonyl acetylides are π-conjugated onto both terminals of the oligothiophene, were prepared by the reaction of the α,ω-bis(alkynyl)oligothiophenes (1-5) with Co₂(CO)8. The molecular structures of new compounds were identified by spectroscopic methods and elemental analysis. In cyclic voltammetry of the clusters 6-10, two oligothiophene-based oxidation processes (one for 7) occur between - 0.2 and 1.5 V, and the one reductive process of the metal cluster moieties occurs between 0.0 and - 1.6 V, which is not present for the oligothiophenes (1-5). The silence of the expected electronic communication of the clusters 6-10 may be attributed to the reduction process followed by fast chemical reactions at ambient temperature. The clusters 6-10 commonly exhibit three characteristic bands: a moderately intense, high-energy band, strong medium-energy band and weak-low energy band. The high-energy bands are attributed to the a π-π localized excitation. The medium- and low-energy bands may be ascribed to the metal-to-ligand (d□-π□) charge-transfer transitions of the cluster moiety.