• 대한가정학회지
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• 제35권3호
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• pp.171-179
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• 1997

The purpose of this research was to grasp the space funtions, the preferred image in bathroom and to find out the plan of bathroom. The subjects of investigation included university students in third decades of which data were obtained by the questionnaire survey method. The major findings were as follows: 1) The space funtions of bathroom were the hygienic activities and the supplementary funtions as resting and health-care. 2) Total and facility image in bathroom take a serious view of a sanitary, a function and following to a mood , a sense of space. 3) The preferred type of bathrooms were identified as the 2-space type. Furthermore, the demands were needed in radiator & pannel heating system, storing furniture and funtional lighting & mirror. According to those results, three types of space plan for bathroom can be suggested and color & forms of design elements can be proposed.

• Journal of the Korean Data and Information Science Society
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• 제21권3호
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• pp.597-603
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• 2010

We obtain, in using generalized norms, some stability results for a very general system of di erential equations using the method of cone-valued Lyapunov funtions and we obtain necessary and/or sufficient conditions for the uniformly asymptotic stability of the nonlinear differential system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 D
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• pp.1318-1320
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• 1998

We have investigated the electrical characteristics of a MOSFET-structured silicon field emitter by employing Maxwell 2D and Silvaco simulators. The potential distribution is obtained by Maxwell 2D simulator and the field emission current is calculated by Fowler-Nordheim equations. The characteristics of MOSFET is simulated by Silvaco simulator. Simulated results are almost identical to the experimental results. Also, we have studied the emission characteristics as funtions of several geometric parameters.

• Journal of Nutrition and Health
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• 제16권3호
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• pp.193-199
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• 1983

Clinical and epidemiologic data point to a causal interrelationship between nutritional deficiency and infectious illness. Both are major contributors to childhood morbidity and mortality, particulary in underprivileged population groups. Protein-calorie malnutrition depress a variety of immune funtions. Delayed hypersensitivity and number of T-lymphocytes are consistently reduced. The interrelationship between nutritional status and immune response was studied in 80 children aged under 6 years. According to the anthropometric assessment based on weight for height for age, 36 children were classified as normal, 22 as morderate malnutrition, and 22 as severe malnutrition. The following determinations were made : hemeglobin, hematocrit, serum albumin, immunoglobulin G, complement 3, and WBC levels. Results indicate that levels of Hb, Hct, serum albumin, and C3 concentration were decreased in moderate and severe malnutrition children. However, levels of IgG and WBC were not affected by the nutritional status. It is suggested that nutritional status has more profound effects on complement system than humoral immunity.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2010년도 추계학술대회
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• pp.459-461
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• 2010

Ad-Hoc VoIP 시스템은 모바일 애드-훅 네트워크 환경에서 사용하는 인터넷 전화기술이다. 소규모 모바일 애드-훅 통신망에서 VoIP 기술은 쉽게 구축을 할 수 있으며 통화 품질 역시 보장한다. Ad-Hoc VoIP 시스템은 클라이언트-서버 방식으로 구현 하지만 MANET에서 서버 기능을 수행하는 기반 스테이션이 존재하지 않아서 서버를 간소화하고 각 단말기에서 분산하게 동작하는 서버에 의존한다. 본 논문에서 리눅스 기반 모바일 단말기를 이용해서 1회선을 처리 가능한 28Mb의 용량인 Ad-Hoc VoIP 시스템을 구현하였다. 데이터베이스를 조정과 IPv4등 기술을 통과하여 서비스 품질을 되도록 향상되었다.

• 한국식품영양과학회지
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• 제21권5호
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• pp.580-593
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• 1992

Cholesterol have many essential functions as a component of cellular and subcellular membranes, metabolic precursor of bile acids and steroid hormones, and obligatory part of the metabolic systems involved in DNA synthesis and cell division. These essential funtions demand a continuous and appropriate supply of cholesterol to the tissues. Body cholesterol pool is maintained by the balance of acquirement from diets, de novo synthesis, and excretion either as bile acids or neutral steroids. In these metabolic process, cholesterol biosynthesis is controlled by the change in the activity of 3-hydroxy-3methylglutaryl coenzyme A (HMG-CoA) reductase. Under most physiological or nutritional situations, the activity of this enzyme is adroitly regulated to maintain tissue cholesterol balance. Excess cholesterol accumulation in the cells induces the decrease in the number of LDL-receptor, followed by the increase in the level of serum LDL-cholesterol. Increase in the level of serum cholesterol appears to be an important determinant for the incidence of the coronary heart disease. Dietary intervention may be helpful in alleviating an increase in the level of serum cholesterol or body cholesterol pool.

• 한국정보처리학회논문지
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• 제2권3호
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• pp.277-287
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• 1995

멀티미디어 통신 단말기를 이용하여 다자간 영상회의를 구현하기 위하여 단말기들 은 논리적으로 상호 연결되어 있어야 하며, 단말기 사이의 연결을 구현하는 방법에는 중앙 집중식 방식과 분산식 방식이 있다. 이중 집중식 영상회의의 구현을 위하여 다 지점 제어 장치가 필요하며, 이러한 다지점 제어장치를 설계하기 위한 방법에는 음성 및 영상처리 장치의 개발 방법에 따라 디지탈에 의한 방식과 아날로그에 의한 방식으 로 크게 나눌 수 있다. 이러한 다지점 제어장치의 의미 및 개발방법을 살펴보기 위하 여, 본 논문에서는 다지점 제어 장치에 대한 주요기능을 정리하였으며, 다지점 제어장 치의 구현을 위한 여러 방법들을 제시하였다.

• 대한지리학회지
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• 제36권4호
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• pp.418-433
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• 2001

이 글의 목적은 지리학의 연구대상으로서 대학을 어떻게 이해할 것이며, 이에 관한 기존의 연구동향과 아울러 앞으로의 연구과제를 살펴보는데 있다. 우리 나라에서는 1980년대 이래 대학교육이 양적으로 크게 팽창되었지만, 대학의 입지적 특성이나 지역적 파급효과, 지역발전과의 연계 등 지리학적 관점에서 체계적으로 다룬 연구가 극히 빈약한 실정이다. 따라서 이 글은 21세기 지시사회에서 지역발전의 핵심요소로서 부상되고 있는 대학의 역할을 고찰하고. 이를 지역발전과 연관시켜 개념적으로 파악하고자 했다. 또한 대학 연구가 활발하고 상당한 연구가 축적되어 있는 선진 제국의 교육지리학적 연구동향과 대학에 관한 연구중점의 변화를 개관하였다. 끝으로 대학과 지역발전에 대한 관심을 환기시키기 위해, 장차 다루어져야할 몇 가지 연구과제를 논의하였다.

• 대한약리학회지
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• 제30권2호
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• pp.167-179
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• 1994

Recent evidence indicates that glial cells have a wide range of funtions which are critical for maintaining a balanced homeostatic environment in the central nervous system(CNS) peripheral nervous system(PNS). Morever, astrocytes are known to participate in the tissue repair and neuroimmunologic events within the CNS through many kinds of growth factors and cytokines. We investigated the effect of $TGF\;{\beta}_1$, on the growth and biochemical changes of rat glial cells in culture. The proliferative effect was determined by $^3H-thymidine$ uptake and the double immunostain with anti-cell-specific marker and anti-Bromodeoxyuridine(BrdU) antibody. To check the effect of biochemical changes we compared the amounts of glial fibrillar acidic protein(GFAP) and the activity of glutamine synthetase(GS) in astrocyte. And the amounts of myelin basic protein and the activity of 2',3'-cyclic nucleotide phosphohydrolase(CNPase) were measured in oligodendrocyte and the amounts of peripheral myelin in Schwann cell. When $TGF\;{\beta}_1$, was treated for 2 days with cultured glial cell, $TGF\;{\beta}_1$, decreased the $^3H-thymidine$ uptake and proliferation index of double immunostain of astrocytes, which indicates the inhibition of astroglial DNA synthesis, but stimulated the growth of Schwann cell. Also, $TGF\;{\beta}_1$, decrease the GS activity and increased the amounts of GFAP in astrocyte. In the case of Schwann cells the amounts of peripheral myelin was increased when treated with $TGF\;{\beta}_1$. However, $TGF\;{\beta}_1$, didn't show any effect on the proliferation and biochemical changes in oligodendrocyte. These results suggest that $TGF\;{\beta}_1$, might have a critical action in the regulation of proliferation and biochemical changes in glial cells, especially astrocyte.

• Journal of Pharmaceutical Investigation
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• 제23권4호
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• pp.225-229
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• 1993

The stability of omeprazole in the aqueous solutions containing arginine or sodium phosphate dibasic(SPD) was examined at 30, 40 and $50^{\circ}C$. Arginine or anhydrous SPD was added to omeprazoie solution ($200{\mu}g/\;ml$ in distilled water) to yield $100{\mu}g/\;ml$ concentration of each. Then, the solution was kept at 30, 40 or $50^{\circ}C$ for 90 hrs. Aliquots of the solution were withdrawn at specified time intervals and assayed by HPLC for intact omeprazole. The remaining percentage-time curves revealed that omeprazole was degraded rapidly as funtions of time and temperature following pseudo first-order kinetics. The rate constant in the SPD solution was much higher than in the arginine solution. In other words. the degradation half-lives of omeprazole at $30^{\circ}C$, for example, was 148 and 76 hr in arginine and SPD solutions respectively. The initial pH of the solution containing $100{\mu}g/\;ml$ of arginine or SPD was 9.7 or 8.7, respectively. Since omeprazole is more stable as the pH of its solution becomes more alkaline, the longer half-life of omeprazole in arginine solution could be explained by the more alkaline characteristics of arginine than SPD in the solution. The activation energy necessary for the degradation reaction was almost identical in both solutions, indicating similar degradation mechanisms of omeprazole in the solutions. In conclusion, omprazole was more stable in the presence of arginine than of SPD.