• 한국약용작물학회지
• /
• 제17권2호
• /
• pp.90-96
• /
• 2009

The objective of this study was to investigate the effect of crude ginseng total saponins (CGS) against airway inflammation (AI) and airway hyperresponsiveness (AH) induced by diesel exhaust particles (DEP) in mice. AI and AH were induced by the intratracheal instillation with 0.1 $mg/m{\ell}$ of DEP suspension once a week for 10 weeks combined with ovalbumin (OVA) sensitization. Mice were also treated orally with 75 $mg/m{\ell}$ of CGS, 5 days a week for 10 weeks. Oral CGS treatment decreased in the level of serum immunoglobulin (IgE) and histamine increased by DEP and OVA, and declined respiratory resistance. It also dropped an enhanced infiltration of eosinophils in the bronchoalveolar lavage fluid (BALF) of mice, and an increased T helper type 2 cell derived cytokine levels such as of interleukin (IL)-4, IL-13 and IL-5 in the BALF. However, it did not influence T helper type 1 cytokine such as interferon-gamma in the BALF. These results indicate that CGS may alleviate allergen-related AI and AH in mice and may play an important role in the modulation of asthmatic inflammation.

• BMB Reports
• /
• 제40권5호
• /
• pp.670-677
• /
• 2007

Although polysaccharide is believed to play an important role in the medicinal effect of Dendrobium chrysotoxum Lindl (DCL), its role as an antioxidant and in anti-hyperglycemic induction was not reported. In this study, polysaccharide with molecular weight of approximately 150 kDa, herein named DCLP, was isolated from the stem of DCL, and its antioxidative, hypoglycemic and immune stimulating effects were evaluated using various in vitro and in vivo assay systems. DCLP inhibited hydroxyl radicals ($^{\cdot}$OH)-mediated deoxyribose degradation by scavenging hydroxyl radicals directly as well as by chelating iron ions. DCLP also showed dose-dependent scavenging activity on superoxide anions ($O_2^{{\cdot}-}$) and offered significant protection (p < 0.001) against glucose oxidase-mediated cytotoxicity in Jurkat cells. DCLP had immune stimulating effects, as evidenced by the DCLP-mediated increases in the level of DNA synthesis, viability, and cytokine secretion in mouse lymphocytes. Moreover, oral administration of DCLP produced a significant reduction in blood glucose level in alloxan-induced diabetic mice. These findings suggest that DCLP has a potential utility in treating patients who require enhanced antioxidation, immune function and/or hypoglycemic activity.

• 한국콘텐츠학회논문지
• /
• 제8권12호
• /
• pp.81-90
• /
• 2008

디지털 테크놀로지의 발달로 정보화 사회의 패러다임이 변화됨에 따라, 디지털 매체의 특성을 이용하는 미디어 아트와 넷아트는 기존의 작품처럼 일방적인 전달이 아닌 움직이고 반응하는 등의 상호작용성이 강한 작품들로 점차 진화하고 있다. 이러한 영향으로 최근에 디지털 미디어 기술을 매체로 한 다양한 실험적인 예술작품들이 네트워크 공간에서 제작되고 있으며 예술과 디지털의 결합을 시도하고 있다. 본 논문에서는 넷아트의 특성과 유희성의 관계에 대하여 살펴보고 넷아트에서 구현되어 나타난 인터랙티브와 네트워크적 특성 그리고 유희성과의 관계를 분석하였다. 이러한 분석을 바탕으로 하여 전통적 캐릭터인 도깨비 형상에 대한 해학적 정서를 넷아트의 유희적 개념으로 표현하여 새로운 미학적 경험을 제공하고자 한다.

• 한국실내디자인학회논문집
• /
• 제21호
• /
• pp.3-9
• /
• 1999

Contemporary society that is apt to be homogeneity because of the development of computer communication and mass-media desires to seek its own identity in native realm. Contemporary Korean architecture has endeavored continuous discussion and practice to keep its identity within the current tendency. The purpose of this study is to grope the alternative for genuine 'Koreaness' to analyse the variant trend of its characteristics 1990's. The variation of Korean society in 1990's that emphasize self-regulation and individual value has influence on the realm of architecture so much. The cognition of 'Koreaness' has changed with center in the individual and small -size design group, not present accommodation of past, but continuous research to find archetype of tradition which can play a decisive role of linking present and future on the foundation of past. Many attempts and practical works that express 'Koreaness' in 1990's are performed in the area of residence works that reflect Korean emotion and life-style directly. This change can be an answer to solve the problem of peculiarity and universality in 'Koreaness'. After 1960's the main theme of 'Koreaness' was traditional architecture form, but because of the induction of Postmodernism and at once its reflection and critical attitude with limit of formal duplication, which lost its meaning. In 1990's, research for spatial form as korean emotion and image has carried out and played an important part of original expression for 'Koreaness'

• Journal of Mechanical Science and Technology
• /
• 제20권9호
• /
• pp.1418-1427
• /
• 2006

Windshield wipers play a key role in assuring the driver's safety during precipitation. The traditional wiper systems, however, requires driver's constant attention in adjusting the wiper speed and the intermittent wiper interval because the amount of precipitation on the windshield constantly varies according to time and vehicle's speed. Because the manual adjustment of the wiper distracts driver's attention, which may be a direct cause of traffic accidents, many companies have developed automatic wiper systems using some optical sensors with various levels of success. This paper presents the development of vision-based smart windshield wiper system that can automatically adjust its speed and intermittent interval according to the amount of water drops on the windshield. The system employs various image processing algorithms to detect water drops and fuzzy logic to determine the speed and the interval of the wiper.

• Computers and Concrete
• /
• 제12권3호
• /
• pp.337-349
• /
• 2013

Traditional concrete is effectively an insulator in the dry state. However, conductive concrete can attain relatively high conductivity by adding a certain amount of electronically conductive components in the regular concrete matrix. The main purpose of this study is to investigate the electrical and thermal properties of conductive concrete with various graphite contents, specimen dimensions and applied voltages. For this purpose, six different mixtures (the control mixtures and five conductive mixtures with steel fibers of 2% by weight of coarse aggregate and graphite as fine aggregate replacement at the levels of 0%, 5%, 10%, 15% and 20% by weight) were prepared and concrete blocks with two types of dimensions were fabricated. Four test voltage levels, 48 V, 60 V, 110 V, and 220 V, were applied for the electrical and thermal tests. Test results show that the compressive strength of specimens decreases as the amount of graphite increases in concrete. The rising applied voltage decreases electrical resistivity and increases heat of concrete. Meanwhile, higher electrical current and temperature have been obtained in small size specimens than the comparable large size specimens. From the results, it can be concluded that the graphite contents, applied voltage levels, and the specimen dimensions play important roles in electrical and thermal properties of concrete. In addition, the superior electrical and thermal properties have been obtained in the mixture adding 2% steel fibers and 10% graphite.

• 제어로봇시스템학회논문지
• /
• 제20권5호
• /
• pp.513-519
• /
• 2014

Videoconferencing technology is increasingly used in classrooms to introduce children to people from other countries and cultures in order to provide a wider learning experience. However, with traditional screen-based video conferencing technology, research has shown that it is easy for students to miss non-verbal cues that play a key role in developing human relationships. To investigate how children interact differently when their interactions are mediated through screen-based video communication versus robot-mediated communication, we conducted a study with elementary students in Korea, comparing the use of both technologies to introduce classroom students with peer-aged individuals in America. Our findings show that the children displayed more positive emotions during certain tasks and exhibited more interest and intimacy to remote participants in the context of robot-mediated communication than with video-mediated communication.

• 디지털콘텐츠학회 논문지
• /
• 제12권4호
• /
• pp.519-530
• /
• 2011

본 논문은 증강현실이 일상적 공간위에 표상된 시공간을 새롭게 느낄 수 있도록 맥락적 인식을 가상화시키고 현실과 비현실의 경계를 혼합하는 과정에 내재되어 있는 가상성 개념을 중심으로 주체성을 전통적 미디어 관점에서 해석해내고자 한다. 미디어 재매개 관점의 비매개와 하이퍼매개를 중심으로 현실 반영성이 어떻게 드러나고 있는지를 밝힘을 통해, 증강현실은 기존 미디어와는 달리 스크린을 주체 일부로 기능하게 하고 역할을 부여함으로써 관찰자, 조작자를 포괄하는 완벽한 디지털미디어의 주체로 전환시켜줌을 알 수 있었다.

• 대한기계학회논문집A
• /
• 제20권3호
• /
• pp.765-774
• /
• 1996

Computer Integrated Manufacturing(CIM) requires models of manufacturing processes to be implemented on the computer. These models are typically used for determining optimal process control parameters or designing adaptive control systems. In spite of the progress made in the mechanistic modeling, however, empirical models derived from experimental data play a maior role in manufacturing process modeling. This paper describes the development of a meural metwork medel for injection molding. This paper describes the development of a nueral network model for injection molding process. The model uses the CAE analysis data based on Taguchi method. The developed model is, then, compared with the traditional polynomial regression model to assess the applicabilit in practice.

• 농촌지도와개발
• /
• 제18권2호
• /
• pp.239-262
• /
• 2011

The study aims to find development plan of the Hanmadang festival in Jachaebanga village. First of all, Financing is the first major obstacle to opening a successful village festival. In order to host village festival. It's important that smooth financing. It needs head north and diversify of the Banga table. Through proceeding by subscription, research a value-added food the village benefits can be better. Because Jachaebanga village located in capital area. The people who live in Seoul and Gyonggi area easily approachable. So, If induce a free visitors to reservation visitors, It will benefit not only village, but also visitors. Hanmadang festival program and another village festival program are evenly alike. Festival organizers must provide a differentiated festival program to reservation visitors. It needs merge the harvest program and society curriculum to amplify the synergy. Like a Turtle play, participation inducement to neighboring traditional culture organization can be of help to consist festival program. There simply aren't enough people here to progress festival properly. In order to supply people to progress properly, Festival plan, Budgets allocations have to be determined by village officers.