• 대한기계학회논문집B
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• 제28권1호
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• pp.81-88
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• 2004

In this study, heat and mass transfer characteristics of five components solution (LiBr＋Lil＋LiNO$_3$＋LiCl＋$H_2O$) which could be substituted for commonly used LiBr solution are tested using a helical absorber. The arrangement of helical-typed heat exchangers allows to make the system more compact as compared to conventional one. The effects of experimental parameters, such as the solution flow rate, cooling water, solution temperature, solution concentration and surfactant have been investigated in view of the heat and mass transfer. The results of the experiment of heat and mass transfer performance show that five components solution should have 2％ higher concentration fur equal absorption capacity of LiBr solution. But considering that five components solution have higher solubility than LiBr solution about 4％ high concentration, five components solution could be applied to a small sized water cooled or air cooled absorption chiller/heater. The increase of heat and mass transfer coefficient by surfactant addition is about 25∼30％ and 23∼40％ respectively.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2004년도 춘계종합학술대회
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• pp.717-720
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• 2004

Jini는 선 마이크로시스템즈에서 제안한 미들웨어 이다. Jini는 각종 디바이스나 소프트웨어들이 하나의 큰 시스템에 연결된 것처럼 서로 정보를 주고받고, 공유하고, 제어할 수 있는 동적인 분간 연합 시스템의 구축을 목표로 한다. Jini는 UPnP, HAVi와 함께 흠 네트워크의 주요 미들웨어로 꼽힌다. 홈 네트워크에서 프라이버시 보호, 방범, 둥의 보안은 아주 중요하며 이를 위하여 Jini에서도 시큐리티를 보강하여 2.0 버전을 2003년 11월에 발표하였다. 따라서 본 논문에서는 Jini 2.0의 시큐리티 분석 및 이를 홈 네트워크에서의 보안과 연관지어 기술하고자 한다.

• 한국자기학회지
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• 제17권3호
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• pp.137-140
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• 2007

레이저 간섭 석판 장비(Laser Interference Lithography; LIL)를 이용하여, Anodic Aluminum Oxide(AAO) 나노기공의 배열을 향상 시켰다. 이후 진공에서 Fe와 Cu를 AAO/Si에 성장하고, AAO를 제거하여 Cu/Fe(20 nm) 나노구조를 제작하였다. AAO의 나노기공과 나노구조는 전처리 과정에서 제작된 PR(photoresist) 나노선을 따라 1차원으로 배열되었다. 자성 나노구조의 자기이력곡선으로부터 이들이 vortex 구조를 가지며, 쌍극자 상호작용이 지배적임을 확인하였다.

• Journal of Nutrition and Health
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• 제10권1호
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• pp.38-43
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• 1977

This study was designed to find out the status of low sodium diet in 27 hospitals located in Seoul and rural areas. The study was conducted from the beginning of June, 1976 to October, 1976. The differences in Na, protein and calorie contents between the hospitals in Seoul an ones in rural areas, and between the medical college attached hospitals and general ones, were compared by means of t-test. Correlation coefficient were made among Na, protein and calorie. In order to find out which food group is the major source of Na in the diet, six food groups were divided and Na content in each was calculated. The results showed that average daily Na intake of 27 hospitals was 2,382mg which is regarded as mild restriction. Average daily protein and calorie intakes were 94gm and 2,438 cal respectively. About 60% of hospitals restricted sodium at mild level $(2,300mg{\sim}4,600mg)$ and 33% at moderate $(1,000mg{\sim}2,300mg)$ and only 7% of the subjects were Planning strict sodium restriction $(250mg{\sim}500mg)$ There was statistically significant differences in Na contents between Seoul and rural areas. But no significant difference was found between medical college attached hospitals and general ones. The correlation between the average daily intakes of Na and protein was found not to be significant but protein and calorie intakes were related each other. When the total sodium intakes divided into six groups, about 74% were supplied by condiments (Food group 6th).

• Journal of Nutrition and Health
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• 제17권1호
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• pp.20-30
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• 1984

This experiment was designed to investigate the effects of the mixing ratio of soyprotein and casein, and the level of pectin combined with the mixture on lipid metabolism in rats. Forty-eight male weanling rats of Wistar strain weighing 58.8\;{\pm}\;1.9g$ were divided into six groups by completely randomized block design and fed 10% protein diet for four weeks. Two types of protein mixtures (casein to soyprotein mixing ratio of 1 : 3 and 2: 1)combined with 0.5% , 3%, and 5% of pectin were employed for experimental diets. The results obtained in the study are summarized as follows ; 1) Feed efficiency ratio and protein efficiency ratio were not significantly different among six groups for the whole experimental period, but those for high casein-low pectin group were significantly higher than the ones for high soy-high pectin group at 4th week of the experimental period. 2) Gross fecal dried weight and fecal lipid excretion were higher in high pectin groups of both protein combinations. Therefore, the apparent fat digestibility and absorption appeared to be significantly low in high pectin groups. 3) Pectin was effective in lowering serum lipid and cholesterol levels in high casein groups, but no effect of pectin was noted in high soyprotein groups. 4) Lipid and cholesterol contents of the liver were higher in high soy-low pectin group than the others. And no marked differences in lipid and cholesterol contents in the kidney and carcass were observed.

• Journal of Nutrition and Health
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• 제30권4호
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• pp.451-457
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• 1997

This study was designed to investigate the effect of the ratio of energy from carbohydrate to total calories on dietary intake, obesity index, blood pressure, and blood lipid content in cardiovascular disease patients over 35 years old. A total of 552(227 male, 325 female) subjects were divided into three groups according to carbohydrate/total energy ratio : carbohydrate ratios below 25 percent were in the low carbohydrate group( <61.1%), between 25 and 75 percent carbohydrate were medium($\geq$61.1-<74.7%), and higher than 75 percent were in the high carbohydrate group($\geq$74.7%). The anthropometric data, nutrient intake, serum lipid levels, and blood pressure of each group were compared with one another. For men and women with high carbohydrate intakes, Inadequate nutritional intake was observed. Abdominal fat accumulation and blood TC level for men in the high carbohydrate group were higher than in medium or low carbohydrate groups. Therefore, it seems that high carbohydrate intake may produce adverse effects on abdominal fat accumulation and blood lipid patterns. Blood pressure, however, was significantly higher for women in low and high carbohydrate groups than in medium carbohydrate group. These results suggest that extremely high and low carbohydrate intake may raise the risk of cardiovascular disease and that it is necessary to consume nutritionally balanced meals. This can be done by controlling the ratio of dietary carbohydrate at a medium level in order to prevent and/or to reduce the risk.

• 건축역사연구
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• 제14권1호
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• pp.123-134
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• 2005

This study is focused on a space for man in upper classes house that is one of appeared characteristics as Korea, China and Japan imported Confucianism become common cultural base in these countries. Because a space for man in these countries has the same nature represented as a typical space in a upper classes house, and this space is differentiated by regional features, a way of thinking, a way of life and social structure as well, these characteristics are compared one another. Import of Confucianism influenced formation of a upper classes house and the spaces of the house are divided by generation, sexuality and classes. A space for man become a center of the house as well as a space for reception in accordance with patriarchism because this space stands for hierarchy of the house. A space for man of each country, Korea, China and Japan, has differences; that is, Chinese Jeongbang is used as a space for family as well as for guests; Korean Sarangchae is for only men and used as a reception space; Japanese Zasiki is used just for reception. These differences among countries are caused by owner's class, a civil officer or a military officer, and this class differentiated the characteristics of reception for guest. Even though the these countries take the space for man for meeting, Chinese is for family, Korean is for ancestors and Japanese is for guests.

• Journal of Nutrition and Health
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• 제12권1호
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• pp.17-22
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• 1979

This study was designed to investigate calcium intake, the ratio of Ca intake versus R.D.A. (Recommended Dietary Allowance) for Ca, apparent Ca absorption rate, and Ca sources of food among school children in Korea. One hundred school children aged from 6 to 12 years were engaged in this study; 33 subjects were from farming village neal Seoul, and 67 children from big cities. Two days of food consumption records and feces collections of the subjects had been done from April 1978 to June 1978. The following observations were made in the present study; 1) Average Ca intake of total subjects was $457{\pm}214mg$ which is only 76% of R.D.A. for Ca. Calcium intakes for farming village children was higher than that of the subjects from big cities (p<0.05). 2) Survey on the food sources of Ca revealed that the amount of Ca taken from cereals averaged 120 mg (22.3% of total Ca intake), 111 mg (24.3%) from fruits and vegetables, 176 mg (38.5%) from meats, poultry, fishes and eggs, and only 68 mg (14.9%) was supplied by milk and milk products. From the data collected, following observations were made; a) No significant difference in Ca intake from cereals was found between village children and the ones from big cities. b) Average Ca intake from fruits and vegetables of city children was significantly higher than that of village children (p<0.005) with the values for 133 mg for the former and 64 mg for the latter. c) For the group of meats, poultry, fishes and eggs, significantly higher intake was found in village subjects than city children (p<0.0005) with the values of 340 mg and 95 mg, respectively. d) Contrarily, Ca intake from milk and milk products was significantly (p<0.0005) much higher in the city children (98 mg) than village ones (7 mg). 3) Apparent Ca absorption rate of total subjects was 51%; 44% for village children and 54% for city children. Ca absorption rate tends to be higher in the city subjects but no significant difference was noted.

• 한국지역사회생활과학회지
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• 제17권2호
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• pp.89-103
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• 2006

This study was performed to provide sources of nutrition education for female adolescents by identifying eating disorder patterns and their relationships with self-body image, weight control, and eating behavior. A total of 329 female middle school students were recruited and completed a general characteristics survey, the Eating Attitudes Test(EAT-26), a perception of self-body image survey, a concern for weight control survey, an eating behavior survey, and the Mini Dietary Assessment Index(MDA). Eating disorder patterns were identified to be obesity stress and weight control(OW), risk of binge eating(RB), and dietary restraint(DR) by factor analysis. OW pattern was related with stout body shape, body dissatisfaction, experience of weight control, skipping of dinner, and low MDA score. RB pattern was associated with lean body shape, body satisfaction, indiscreet snack behavior, and the eating time of snacks. The DR pattern was associated with normal body shape, regular meal times, desirable snack behavior, and high MDA scores. The results indicated that the eating patterns of adolescent were not identical to existing diagnostic categories. Furthermore, each eating pattern displayed different characteristics of perception on self-body image, concern for weight control, and eating behavior. In conclusion, nutrition education for female middle school students could reflect the different characteristics of each eating disorder pattern.

• 한국콘텐츠학회논문지
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• 제6권6호
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• pp.64-73
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• 2006

본 연구에서는 교육소외계층의 이러닝 평생교육을 활성화하기 위하여 이러닝 접근성을 향상시켜줄 수 있는 ICT 활용 교육의 방향을 탐색하였다. 이를 위해 소외계층을 대상으로 이러닝 접근성의 실태를 파악하고 이러닝 접근을 향상 시켜줄 수 있는 성인 기초 ICT 활용 교육의 방향을 제시하였다. 연구 결과에 따르면 성인 학습자들은 연령별 이러닝 접근 능력 격차가 아주 심한 것으로 나타났다. 따라서 ICT 활용 교육은 연령별로 실태를 고려하여 이루어지는 것이 바람직하다. 10 20대 연령층은 인터넷 동호회, 워드프로세서, 동영상 등의 순으로, 30 40대는 채팅, 인터넷 동호회, 검색엔진 등의 순으로, 50 60대는 채팅, 인터넷 동호회, 동영상 등의 순으로 ICT 활용 교육이 진행이 필요하다. 또한 인터넷 동호회 활동을 활성화시켜 이러닝 참여 능력을 스스로 적극 개발할 수 있도록 유도하는 것이 필요하다.