急峻펄스 電壓을 利用한 强力오존發生裝置開發에 관한 硏究

文在德,吳哲洙,鄭華淑 경북대학교 1985 論文集 Vol.40 No.-

The power efficiency of ozone generation can be substantially improved by modifying a direct discharge wire of a wire-to-cylinder type ozone generator to a helical strip line. and using a fast rising pulse voltage on it. It is raised 1.3 times up of ozone yield compared with that of 60 gO_3/KWh of the industrial silent discharge type ozone generator. Parametric studies also made to get the optimum design of ozone generator tested. The generated ozone concentration had a peak value with proper increasing the crest pulse voltage, the quantity of a pulse forming condenser capacity of the pulse generator, and the interelectrode spacing of self triggered stainless steel spark balls. It is found that the optimum strip line length of the ozone generator tested was about 2m in view point of energy consumption. And, input and terminal impedance also effected greatly to ozone generation, the generated ozone concentration were increased when the input impedance had been 25Ω while the terminal had been opened.

보우타이 패치 안테나의 초광대역화 설계

문수덕,박재일,최경,황희용 강원대학교 정보통신연구소 2005 정보통신논문지 Vol.9 No.-

In this paper, A ultra wideband antenna with electromagnetically coupled feeding is presented. The designed antenna is composed of Bow-tie patch with parasitic patch ground of a semicircular shape. The measured bandwidth of the designed antenna is from 2.5GHz to 8.3GHz for -10dB return loss (VSWR < 2). This antenna shows a similar radiation pattern of monopole and maximum gain better than ideal dipole throughout the operating frequency band.

간이식 영양 조사법을 적용한 중년 부인의 영양실태 : A. 간이식 영양 조사법 검토 B. 중년 부인의 식생활 상태 A. Evaluation of a "Convenient Method" for the Estimation of Dietary Food Consumption B. Nutritional Status of Middle Aged Korean Women

문수재,이기열,김숙영 연세대학교 대학원 1980 延世論叢 Vol.17 No.1

A. Evaluation of a "Convenient Method" for the Estimation of Dietary Consumption. The purpose of this study leas to design a "convenient method" and to evaluate it's validity to survey nutritional status. Dietary information on 5 female college students covering 6 days was investigated by 3 methods. One method was a precise quantification of dietary intake which was done in the same manner as the national nutrition survey. The other two methods were "convenient dietary questionnaires" regarding their food consumption. Seven food groups (that is 1. fish, treat, eggs and soy bean products, 2. milk and dairy products 3. vegetables, 4. fruits, 5. cereals and potatoes, 6 sugars and candies 7. fats and oil) were examined for the purpose of estimating the intake of dietary nutrients. Of the two convenient methods, one was chosen by significant levels of Pearson product Moment Correlation. A significant correlation was found between the ordinary survey method and the selected convenient method on energy, protein, carbohydrate, fat, iron, thiamin, niacin and ascorbic acid intakes. No correlation was observed between the two methods on calcium, vitamin A and riboflavin. B. Nutritional Status of Middle-Aged Korean Women. The purpose of this study was to investigate the nutritional status of middle-aged Korean women by appling a "convenient method" for the estimation of dietary food consumption. The survey was conducted on middle-aged Korean women from Oct. 28 to Nov, 10 in 1979. The results obtained are summarized as follows: 1. The average alee, height, weight and Kaup's value of subjects were 51-years-old, 157.5 cm., 56kg. and 2.25 respectively. 2. The average nutrient intake of subjects per day was met by Recommended Dietary Allowance. The average caloric intake, 2193 Kcal. was consist of carbohydrate 63%, protein 16% and fat 21%. Only vitamin A(4550IU)was lower than the Recommended Dietary Allowance. The percentage of animal protein to total protein was 58.6%. 3. The average alee of the menarche and menopause was 16.3 and 47.7 years old respectively.

Gel 狀 食品에 關한 실험조리적 검토 Ⅱ-응고제에 따른 두부의 Testure 특성을 중심으로

文秀才,孫敬喜 연세대학교 대학원 1980 延世論叢 Vol.16 No.2

Soybean curds were prepared using coagulants such as calcium sulfate, calcium chloride, magnesium chloride, glucono delta lactone and acetic acid. Their hardness was measured by a sensory method to develop a standard recipe. The textural characteristics of bean curds prepared by the standard recipe were measured by a texturometer and a penetrometer, and results there-from were used to establish a texture standard for soybean curd. Changes in the texture of soybean curd under different cooking conditions were surveyed by a penetrometer. Results obtained through the aforecited experiments are summarized as follows: The optimal concentration of coagulants for soybeancurd preparation was 1.84% for calcium sulfate, 1.05% for calcium chloride, 1.84% for magnesium chloride, 1.97% of glucono delta lactone and 0.48% of acetic acid. As the result of the sensory evaluation, the most acceptable soybean cued was determined to be one made with acetic acid. Other coagulants in the order of acceptability were magnesium chloride, calcium chloride, glucono delta loctone, calcium sulfate soybean curd, and commercial soybean curds. Through the objective examination of soybean curds by a texturometer and a penetrmoeter, it was found out that calcium sulfite soybean curd was the hardest, followed by glucono delta lactone, magnesium choloride, calciumchloride, and acetic acid soybean curd. Acetic acid soybean curd, the most acceptable, was 0.47TU, and calcium sulfate soybean curd, the least acceptable, was 1.73TU. Bean curds were put into distilled water and solutions of different concentration revels including salt, mono sodium glutamate, acetic acid, starch, and sodium carbonate. They were then boiled at the temperature of 100℃ for two, five, ten and twenty minutes, respectively, while their textural changes were observed by a penetrometer The hardness level of soybean curd texture in varying cooking conditions dropped sharply in five minutes of cooking. It then slowly rose or fell for ten minutes. From this point on, the level of hardness continued to decline in process of time. Accordingly, it is not necessary to boil soybean curd for more than ten minutes.

우리나라 공동주택의 환경친화성 평가 및 한계 연구

문수영,양윤재 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The Goal of this study is to evaluate the environmental status of multi-family housing and to analyze the grade of applying environmentally friendly design guide to multi-family housing in Seoul. For this study, it needs to investigate multi-family housing which has more than 300 houses in one's estate and was built after 1995. Among 330 estates which were investigated, 250 estates were allegedly to be built as "Environmentally Friendly Housing". From 250 estates, 4 multi-family housings are selected and investigated for this study.

심한 정신병적 증상을 나타낸 전신성 홍반성 루푸스 3례

문혜원,강민희,송정수,박원,김철응,이정섭,배재남 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.3

전신성 홍반성 루푸스(systemic lupus erythematosus, 이하 SLE)는 원인을 알 수 없는 자가항체 및 면역복합체로 인하여 여러 장기의 손상을 초래하는 질환이다. SLE의 신경정신의학적 증상에 대하여는 1872년 Kaposi에 의해 처음 기술되었다. 이때에 나타나는 임상적 양상은 상당히 다양하여 정신증, 우울증, 뇌졸증과 인지기능장애등을 포함한다. 이들은 종합적인 정신과적 평가를 위해 종종 협의진료가 의뢰되고 있다. SLE의 정신병적 증상은 환자의 사망률을 높이고 좋지 않은 예후를 시사하는 지표가 될 수 있기 때문에 조기 진단 및 치료가 요구된다. 그러나 SLE의 중추신경계 침범에 대한 명확한 진단기준이 마련되어있지 않고, 증상의 다양성과 변동성은 진단을 더욱 어렵게한다. 저자들이 경험한 심한 정신병적 증상을 보인 SLE 3례의 경우, 이들은 지남력 장애, 환시, 환청, 망상, 불안정한 기분을 보였고 자주 충동적이 되거나 난폭해져 자신 또는 타인에게 위험을 초래할 수 있었다. 현재까지 SLE의 정신병적 증상에 대하여 잘 알려져 있지는 않지만, 문헌고찰을 통해 발병기전, 분류진단, 임사양상, 치료등에 대하여 알아보았다. Systemic lupus erythematosus(SLE) is a disease of unknown etiology in which multiple organs are damaged by pathogenic autoantibodies and immune complexes. Neuropsychiatric manifestations in SLE were first described by Kaposi in 1872. These are so diverse that they include psychosis, depression, stroke, seizure and cognitive dysfunction etc.These patients are frequently consulted for psychiatric evaluation. Neuropsychiatric manifestations in SEL re also among the leading causes of morbidity and mortality and associated with poor long-term outcome. So it is essential to recognize and intervene these symptoms early. But the clear diagnostic criteria for CNS involvement in SLE have not been formulated, and diversity and fluctuation of illness make it difficult to confirm it. The authors reported three cases of SLE with severe neuropsychiatric manifestation. These patients showed symptoms such as disorientation, auditory and visual hallucibation, delusion and mood instability. They became frequently impulsive and violent and had risks to injure themselves or others. Although CNS involvement in SLE is not well known, we reviewed the pathogenesis, classification, diagnosis, clinical manifestation and treatment of them.

Q 열에 의한 감염성 심내막염 2예

문수연,최영실,박미연,이정아,정미경,정혜숙,정두련,송재훈,백경란 대한감염학회 2009 감염과 화학요법 Vol.41 No.3

Q fever is a zoonosis caused by Coxiella burnetii, Presenting as acute and chronic illness and it has been reported worldwide. Acute Q fever is usually asymptomatic or mild and self-limiting, but infective endocarditis is one of the most serious complications of chronic Q fever and can be fatal. Known risk factors for Q fever endocarditis are valvular heart disease, immunocompromised hosts, and pregnancy. There have been some reports on Q fever in Korea but there exists no report on Q fever endocarditis. We have experienced 2 cases of Q fever with underlying valvular heart disease; both Patients came to the hospital for evaluation of prolonged fever. Although Q fever and Q fever endocarditis are rare in Korea, Q fever endocarditis should be considered in the differential diagnosis of patient with infective endocarditis when causative microorganism cannot be identified.

운동종목에 따른 운동선수의 영양필요량 및 기호성에 준한 표준 식단의 컴퓨터 입력 프로그램 개발방법에 관한 연구

문수재,손경희,이동우,이영미 연세대학교 대학원 1986 延世論叢 Vol.22 No.1

본 연구는 각종 운동선수 대상의 설문조사를 기초로 하여 운동선수의 식생활 관리를 위한 전산화 프로그램을 제시하였다. 즉 1) 운동선수의 식기호를 통한 요구와 체급의 필요에 준한 각종 식단작성과 급식관리를 위한 전산화 프로그램을 작성하였다. 2) 이에 근거를 둔 영양상담 프로그램을 개발하기 위한 기초자료의 정리를 시도하였다. 기초자료 수집을 위해 실시한 16종목의 운동선수 232명을 대상으로 실시한 기호도 및 생활유형 분석조사의 결과는 대부분의 운동선수가 ① 규칙적인 생활을 하고 있었으며, 일일생활의 구성은 취침(7~8시간), 아침식사전 운동(1~1 1/2시간), 오전운동(2~3시간), 오후운동(2 1/2~3 1/2시간), 식사 및 휴식(5~7시간), 자유시간(1~3시간)으로 구성되어 있으며, ② 현재 식생활의 문제점은 단체급식시 급식시 제공되는 음식의 맛, 질적수준, 3끼 음식 분배량의 부적절성, 경기직전에 식사의 지나친 감량이나 증량을 지적하였다. ③ 조사대상으 88%가 장기적인 식사관리가 필요하다고 지적했으며, 경기력 향상을 위해 특별히 처방된 식사를 하는 선수는 전체의 43.5%로 처방식의 주종은 육류(단백질식품), 야채(비타민, 무기질식품), 그 이외 열량농축식품(지방, 캔디류)으로 구성되어 있었다. 처방식을 가지고 있는 주요 이유는 영양섭취를 개선시킴으로써 경기력 및 체력향상과 운동시에 condition조절이 가능하다는 점을 지적하였다. ④ 식품에 대한 기호성 조사에서는 대부분의 식품에 대해 극히 싫어하거나 기피하는 문제점은 없었다. 컴퓨터를 이용한 운동선수 대상의 식생활관리 프로그램 개발을 위해서 사용한 기기는 IBM-PC OA-16XT기종의 Personal computer였으며, 이 기기에서 이용가능한「Basic language」,「lotus」system, 「DBASE Ⅲ」를 이용하여 프로그램을 작성하였다. 프로그램 작성을 위해 선행한 연구로 ① 설문조사를 통하여 운동선수의 생활유형을 분석하여, 각 운동종목별 영양필요량 산출을 시도하였고, ② 한끼에 1,200Kcal를 공급할 수 있는 식단을 영양학적, 식품학적 견지에서 작성하였으며, ③ 식품별 자료처리가 용이하도록 식품교환단위의 설정 및 음식에 고유 번호를 부여하는 작업을 실시하였다. 프로그램은 ① 일일 섭취한 영양가 평가하는 프로그램 ② 운동종목, 체중, 성, 생활시간을 고려한 일일 필요 영양소량을 계산하는 프로그램 ③ 변화있고 다양한 식단작성 및 Recipe 제시 프로그램을 개발하였다.

Sr·페라이트의 자기특성에 관한 연구

임재근,서강수,문현욱,신용진 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-

This thesis is the study on the magnetic properties of strontium (Sr) ferrite. Specimens of SrO·nFe₂O₃,basic composition, with n=5.9 which is nonstoichiomatric composition region were prepared by sintering at 1275°C for 1hr, whthin air surroundings. In order to increase coercivity, additives of 0.4wt%SiO₂ and 0.7wt%CaCO₃ were added into basic composition, and 0.5wt%∼2.0wt%Cr₂O₃ was added as second additives. In case of second additives 1.5wt%Cr₂O₃, it was obtained uniformed grain size and magnetic properties was increased. The sintering temperature was 1150°C, 1180°C, 1210°C, 1240°C and 1270°C respectivily and cooling was performed in furnance. From the research and experiments on the magnetic properties of strontium (Sr) ferrite based on the complex additive technique, it was obtained good magnetic properties of (BH)mas=0.72MGOe, at the sintering temperature of 1210°C, in the case of (basic composition)+(basic additive)+(1.5wt%Cr₂O₃)

TiAl 합금을 위한 Al-21Ti-23Cr 및 Al-37Ti-12Cr 코팅재료의 장기간 산화특성 평가

이재경,김수현,오명훈,위당문 대한금속재료학회 2003 대한금속·재료학회지 Vol.41 No.10

Both Al-21Ti-23Cr(L1₂+Cr₂Al) and Al-37Ti-12Cr(γ+TiAlCr) two-phase alloys have been accepted to be the most pertinent coating materials in Al-Ti-Cr alloy system to improve the high-temperature oxidation resistance of TiAl alloy taking into consideration of the oxidation properties, the resistance to thermal stress and the chemical compatibility. The cyclic oxidation tests at 1000℃ and 1200℃ were performed for the specimens coated with both materials of 10 mm thickness, and the breakaway oxidation could be observed although both bulk alloys could form a stable Al₂O₃layer. And it was resulted from depleted Al content in the coating layer due to Al₂O₃oxide growth and interdiffusion with substrate. Considering the decrease of Al content resulting from oxide growth, the Al-21Ti-23Cr coating with higher initial Al content was more effective for oxidation protection of TiAl alloy for long-term service. On the other hand, when the change of Al content due to the interdiffusion with substrate was considered, the Al-37Ti-12Cr coating with smaller compositional gradient with TiAl substrate was more effective than the Al-21Ti-23Cr coating. However, it was confirmed through the cyclic oxidation tests at 1000℃ and 1200℃ that the initial Al content was more important for longer life-time of coating materials than the smaller compositional gradient with substrate. Therefore, the Al-21Ti-23Cr coating would be supposed to be more effective for long-term oxidation resistance of TiAl alloys.