• 한국실내디자인학회논문집
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• 제19권3호
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• pp.260-268
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• 2010

At a passenger terminal which is a core facility of a large-scale airport, users are not easy to recognize its space and to approach each facility by composition of large-scale space not recognized at a glance and arrangement of complicated functional space. Such a passenger terminal should be designed by putting a focus on functionality, safety and convenience since diverse passengers use it. At a passenger terminal, a lot of passengers' circulation followed by diverse purpose appear. Therefore, it needs a lot of functional space and space to satisfy passengers' demands. When circulation is planed, it should be designed by a systematic standard. The study was carried out on the basis of international airports, considering features and functions of airport circulation system. In kind of circulation in passenger terminal of an airport, there are user's circulation (passenger's circulation, employee's circulation and service circulation) and baggage circulation. The study examined passenger's circulation which was a major circulation of passenger terminal out of user's circulation. The study examined elements which had an effect on circulation system at a large-scale airport passenger terminal and basic data for an efficient circulation system standard of passenger terminal through case analysis of passenger terminal circulation systems at international airports.

• 한국환경복원기술학회지
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• 제12권3호
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• pp.49-58
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• 2009

This study was done to provide a case model with a concept of environmental integration based on the water circulation system. Area of interest (AOI) is the Eastern Pangyo New Town area, which has several advantages in adaptation of a water circulation system. The AOI has a potential of maintaining water resources, and has a good condition to construct the water circulation system. Research done for the purpose of the establishment of the water circulation system in the Eastern Pangyo New Town shows the following. The main sources of water supply in the water circulation system in the Eastern Pangyo New Town is from two subway stations and runoff water, along with the natural water flowing from the mountains, rain water, and stream water. It was determined that more than 35,000 tons of water would be needed for the creation of water circulation system at the Eastern Pangyo. If the creation of infrastructure for the use of runoff and rain water as well as the periodic management can be provided, it can serve as the new model for a new city with water circulation system. In addition, since the Eastern Pangyo New Town water circulation system can secure enough amount of water resources, natural drainage system (NDS) in which it can be in dry condition in non-rainy days, is applied and connected to the typical waterways. Such water circulation system has many positive aspects including the wise use of water resources, and providing wild Life animals corridors and habitats. Also, the water circulation system can lead to the environmental education to the residents and visitors on environmental awareness of the water circulation system and their environment.

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제12권3호
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• pp.35-41
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• 2006

At the moment, a lot of interest in the research on Gnotobiotic Pigs are increasing in order to produce alternative human organs. So, it is very important to design and build proper housing facilities for Germ Free Pigs. Among the design issues related to Gnotobiotic Pigs' farms, circulation system takes a high position because it carries an important role in keeping the pig's housing environment aseptic. Considering those, this study aims to propose the guidelines for the design of circulation system in Germ Free Pig's facilities. The results of this study are as follows. At first, functional areas of Germ Free Pigs' facilities have been divided into three categories according to the clean level; aseptic area, semi-aseptic area, and non-aseptic area. Secondly, the basic principles of circulation system have been proposed. Finally, circulation system of Gnotobiotic Pigs' facility has been explored as a form of diagram according to the circulating subjects. These include human circulation, pig's circulation, and goods' circulation. This study has some limitations in that it is transcendent and lacks empirical evidence. Despite of some weaknesses, it is expected to give some useful guidelines for the design of circulation system in Germ Free Pigs' facilities.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집D
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• pp.170-174
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• 2001

In this paper, CFD technique has been used at design stage to predict space air distribution in a cycle stadium with air circulation system. An air circulation flow of 0.67 rev./min was observed at computed results in the stadium space with and without air circulation system. Comparing the thermal comfort of the two models with or without air circulation system showed that the thermal environment in the former was superior in the latter. Energy savings could be achieved for the model with air circulation due to its lower air inflow temperature.

• 한국문헌정보학회지
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• 제42권1호
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• pp.33-44
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• 2008

인터넷의 대중화와 IT 기술의 발전에 따라 인터넷을 통한 동영상 자료의 활용 및 유통이 활성화되고 있다. 성장하는 유기체로서 정보 유통의 중심이 되어야 할 도서관의 입장에서는 새로운 정보원으로서 동영상 정보의 유통에 관심을 기울어야 하는 시점이다. 본 고에서는 이러한 배경에서 동영상 정보자료의 유통을 위한 시스템 구축의 기반을 제시하고자 하는 목적으로 동영상 유통시스템 구축과 관련된 제반 사항을 검토하였다. 이를 위해 인터넷을 통한 동영상 유통현황과 유통활성화의 기술적 기반이 되는 관련 기술 발전현황을 살펴보았다. 또한 동영상 정보자료의 유통을 위한 시스템의 각 구성요소를 소개하였고 실제 구축과정에서 고려해야 할 기반 요소들을 검토하였다. 본 연구를 통해 소개된 내용을 기반으로 실제 동영상 유통시스템의 구축을 검토하는 도서관 실무에 도움이 될 수 있기를 기대한다.

• Journal of Chest Surgery
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• 제22권4호
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• pp.525-547
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• 1989

Hemorrhagic tendency observed in open heart surgery patients has been attributed, among other causes, to increased fibrinolytic activity during extracorporeal circulation. But the exact mechanism of enhanced fibrinolytic activity which occurs during extracorporeal circulation is still unknown. So, we studied and compared the changes of parameters of fibrinolytic and protein C system according to time obtained from the plasma of 31 adult open heart surgery patients[EGG group] and 10 adult general thoracic surgery patients[control group], in order to confirm the hypothesis that the activated protein C system might affect the fibrinolytic system during extracorporeal circulation. In ECC group, the nature of the enhanced fibrinolytic activity that evolved during extracorporeal circulation was characterized by significant increase in fibrin degradation products[P < 0.01] and significant decrease in plasminogen and alpha2-antiplasmin[P < 0.05, P < 0.01] in spite of adequate amount of heparin administration. These changes were most pronounced in the early phase of extracorporeal circulation and normalized after termination of extracorporeal circulation. The results of these observations were the same after volume correction with the value of hematocrit. The change of volume corrected protein C ratio during extracorporeal circulation revealed similar pattern to those of plasminogen and alpha2-antiplasmin [P < 0.01], but volume corrected ratio of free protein S showed significant increase after the commencement of extracorporeal circulation then decreased after extracorporeal circulation. Although the above mentioned changes occur similarly in both bubble type oxygenator-used and membrane oxygenator-used patients groups, but the degree of decrease was more severe in membrane oxygenator-used patients group [P < 0.01] and showed much slower recovery to reach to the preextracorporeal circulation level. These results confirm the hypothesis that the enhanced fibrinolysis during extracorporeal circulation might be caused by the activation of protein C system and the activation is possibly linked to the appearance of thrombin from contact activation of blood after wide exposure to the synthetic surfaces of extracorporeal circuit. Key words: Extracorporeal circulation, Enhanced fibrinolysis, Protein C system.

• Transactions on Electrical and Electronic Materials
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• 제16권1호
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• pp.25-28
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• 2015

In this study, a basic research on artificial liver was performed for its application to people on the waiting list of liver transplant or patients with hepatic insufficiency. Artificial livers are generally classified into mechanic type, bioartificial type, and hybrid type. An extracorporeal circulation device was examined herein, which is indispensable in the application of an artificial liver, for its effectiveness in supporting the recovery of liver functions. Extracorporeal circulation system is a treatment and life-support system which sends out the patient's blood, removes toxicity by various methods, and then sends the blood back to the interior of the body. This study used an extracorporeal circulation system which enables the Plasma Perfusion by CVVH method, and applied the program of Bioateco corp. Animals with acute hepatic insufficiency were produced to apply the extracorporeal circulation device. As a result, their ammonia, bilirubin, SGOT, SGPT, and bile acid levels rose, confirming the liver function restoration in the experimental animals.

• 한국자동차공학회논문집
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• 제3권6호
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• pp.212-223
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• 1995

To improve the efficiency of a power transmission system with slip elements, power split/circulation system is applied. The performance of a power split/circulation system varies widely by the change of the followings; the layout of system, the type and gear ratio of planetary gear, the performance of slip element, etc. Therefore, when one designs such a power transmission system or when one determines the economic/power mode of system, a certain performance prediction method is needed. In this study, the internal power flow pattern of a power split/circulation system is theoretically analyzed on several transmission systems. And an effective performance prediction method(so called performance locus diagram) is presented. By this method, the effects of design factors can be easily understood and the qualitative performances of system can be clearly evaluated.

• Nuclear Engineering and Technology
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• 제51권3호
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• pp.654-664
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• 2019

The geometrical and electromagnetic variables of a rectangular-type magnetohydrodynamic (MHD) circulation system are optimized to solve MHD equations for the active decay heat removal system of a prototype Gen-IV sodium fast reactor. Decay heat must be actively removed from the reactor coolant to prevent the reactor system from exceeding its temperature limit. A rectangular-type MHD circulation system is adopted to remove this heat via an active system that produces developed pressure through the Lorentz force of the circulating sodium. Thus, the rectangular-type MHD circulation system for a circulating loop is modeled with the following specifications: a developed pressure of 2 kPa and flow rate of $0.02m^3/s$ at a temperature of 499 K. The MHD equations, which consist of momentum and Maxwell's equations, are solved to find the minimum input current satisfying the nominal developed pressure and flow rate according to the change of variables including the magnetic flux density and geometrical variables. The optimization shows that the rectangular-type MHD circulation system requires a current of 3976 A and a magnetic flux density of 0.037 T under the conditions of the active decay heat removal system.

• 교육시설
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• 제15권6호
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• pp.12-21
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• 2008

The purpose of this study was to research on relationship between the circulation system of students and resident users in elementary school complex. 4 elementary schools in Seoul were chosen for this study. The method of this study is a plan analysis, an on-the-spot survey, and user behavior observation. The circulation system of students and resident users at school zone(outside) and Community school were observed. The following is the main results of this study. First, circulation systems are mixed between public zone and student zone in Community school. Therefore these zones shall be planed separated. Second, resident users tend to go directly to the facilities gathered together. Therefore main entrance has to be located closely to the facilities gathered together. In accordance with this results, both the main entrance of Community school and the students facilities have to be considered when planing the circulation system in school from now on.