• 한국유체기계학회 논문집
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• 제14권6호
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• pp.85-90
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• 2011

Recently, many high elevation fountain are constructed for the beauty of beach landscape. Typically, a fountain has several nozzles that shoots water upwards or at an angle into the air. But unfortunately, the weather and wind can cause the water soak nearby walkways and pedestrians. Therefore, in this study, a mathematical model of high elevation fountain is suggested to predict the actual travelling distance of water droplet by the wind. To simplify our treatment of the water flow and to avoid issues such as fluid dynamics and surface tension, we have adopted a particle model for the fountain water. The particles are assumed not to interact with each other, and do not deform during their flight through air.

• 디지털산업정보학회논문지
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• 제8권1호
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• pp.147-155
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• 2012

Fountain codes ensure reliability and robustness for time varying channels in wireless communication. In this paper, the concatenated fountain codes for AWGN and slow fading channels are investigated. Wireless system model, which includes the concatenated fountain code and modulation, is proposed. Maximum achievable rate is used for analyzing the performance of the system model for AWGN and fading channels. Belief Propagation (BP) algorithm is used for exploiting the soft information received at the decoder. Simulation results show that, concatenated fountain codes performs significantly better than that of a conventional Fountain codes with large packet lengths for higher Signal to Noise Ratio (SNR) in slow fading channels.

• 한국환경과학회지
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• 제20권7호
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• pp.819-828
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• 2011

This research was done to clarify the cooling effect of water particles generated from a fountain. This effect is a one way to control the heat island effect of big cities. The result of this research was drawn by setting the jets of water in a certain height, and then studying the diffusion of water particles, which is affected by the size of the particles and the wind speed, and the cooling effect caused by the diffusion. 1) When a diameter of a water drop was 500 ${\mu}m$ and the wind speed was 2.0 to 6.0 m/sec, the water drop diffused 75 to 190m, and the water vapor spread over 175 to 440 m. As a result, there was more than $0.5^{\circ}C$ of cooling effect on the temperature in the atmosphere 130 to 330m around the water fountain. 2) When a diameter of a water drop was 750 ${\mu}m$ and the wind speed was 2.0 to 6.0 m/sec, the water drop diffused 65 to 150 m, and the water vapor spread over 160 to 405 m. Moreover, there was more than $0.5^{\circ}C$ of cooling effect on the temperature in the atmosphere 110 to 275 m around the water fountain. 3) After studying on the relationship between the diameter of water drop and the wind speed, and the diffusion of water particles and the range of the atmosphere that was cooled, a result could be drawn from the research that the smaller the diameter of the water vapor gets and the faster the wind speed becomes, the wider the water particles diffuse and the cooler the atmosphere around the fountain becomes. 4) This research further extrapolates that when the ordinary water(tap water, water from river and stream) is used in a fountain, the cooling effect of the air near the fountain can be approached similarly. If the seawater is used in a fountain, there is to be more to concern not only on cooling effect on the air, but also on other effects on surrounding environment generated by the salt in seawater.

• 한국인터넷방송통신학회논문지
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• 제13권3호
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• pp.39-45
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• 2013

본 논문에서는, 간섭 조건의 2차 네트워크에서 파운틴 코드를 사용하는 협력 릴레이 프로토콜을 제안한다. 제안된 프로토콜에서 2차 소스는 2차 릴레이의 도움으로 2차 목적지까지 파운틴 코드로 메시지를 전송한다. 2차 소스와 릴레이는 언더레이 모델에서 작동하며, 1차 사용자에 의해 발생된 간섭의 경우, 허용된 임계 값보다 낮기 때문에 2차 소스와 릴레이의 전송 전력에 적응해야한다. 제안된 프로토콜의 성능 평가를 위해, 레일리히 페이딩 채널환경에서 평균 전송 시간의 식을 유도한다. 또한, 몬테-카를로 시뮬레이션을 통하여 유도된 식을 검증 하였다.

• 대한기계학회논문집
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• 제11권6호
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• pp.1026-1035
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• 1987

본 연구에서는 두께방향에 따른 유동을 해석하는데 "fountain effect" 및 열 전달 현상을 동시에 고려하면서 진전하는 자유표면의 형상을 정확히 구하기 위한 유한 요소법을 이용한 수치해석법을 제안하고 그 방법을 적용하여 금형벽의 온도를 변화시 켜가면서 구체적인 유동특성을 해석하였다.특성을 해석하였다.

• 한국조경학회지
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• 제28권3호
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• pp.53-60
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• 2000

Although built-environment has not only function but also socio-cultural meanings, the latter is neglected in the modernism. People don't have the identity of their place because they can't communicate with environment. Therefore, expressing the socio-curtural meanings in landscape is one of main issues after the modern era. The meanings of phenomena can be analyzed by the Semiology based on Structurism, the methodology which has been developed in Linguistics and Anthropology since 1900's. The purpose of this study is to adapt Helmslev's model that can effectively explain the meanings of built-environment and interpret the Koreaness, one of important meanings in contemporary urban park, Paris park. The following methods are used for achieving the purpose. 1. Adaptation of the Helmslev's model for interpreting the urban park. 2. Interpretation of the Paris park. 3. Making the types of interpretion of Paris park. The results are as followings: 1. Helmslev's model can explain the content and expression of the urban park in denotation and connotation. 2. Th socio-cultural meanings of Paris park are the relationship of France, Yan and Yin theory, philosophy of Samjae, king's authority. And they are expressed in the pattern of paving, the shape of mounds, fountain, and pond, a picture of the wall, colours of lightings and columns, and a mark of bollards.

• 대한기계학회논문집A
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• 제24권6호
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• pp.1575-1583
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• 2000

Recently, the sandwich injection molding has drawn attention because it offers the flexibility of using the optimal properties of two different but compatible polymers and is also one of the most p romising methods in connection with recycling of thermoplastics. In this paper, a new particle tracing algorithm is presented in order to describe the advancement of core polymer melt during filling stage. The main advantage of this algorithm is the use of identity field information rather than tracking a set of fluid particles. In addition, to model the process accurately, especially to detect the possible

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 2007년도 가을 학술발표논문집 Vol.34 No.2 (C)
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• pp.385-389
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• 2007

전통적인 디지털 박물관 시스템은 전시를 조직화하는 단순한 기능에 촛점을 두고 있으며 설계 패턴은 전시 항목들에 기반을 두고 있다. 이것의 생명주기는 직선적이고 피드백과 재사용성이 부족하여 생명 주기에서 지식 처리를 다루는 것에 대해서는 관심을 가지지 않고 있다. 하지만 현대 디지털 박물관은 급진적으로 증가하는 정보를 다루어야 하고, 디지털 감상, E-학습과 관련 연구를 위해 통합된 기능을 제공해야 한다. 이러한 요구사항들은 디지털 박물관에서 객체들이 고수준으로 추상화되고, 생명주기도 반복적이며 재사용이 가능하도록 요구하고 있다. 그러므로 체계적으로 통합된 지식처리 과정들이 디지털 박물관에서 정보시스템을 다루기 위해서 절대적으로 필요하게 되었다. 본 논문에서는 현대 디지털 박물관 시스템에서 새로운 생명주기를 제안한다. 지식 흐름(knowledge flow)은 디지털 박물관 생명주기에 걸쳐서 모든 정보 흐름으로부터 고수준으로 추상화된 객체이다. 지식 흐름을 따라가게 되면 이 특별한 생명주기는 정의된 시금석으로서 다차원의 분수 모델(Fountain Model)과 비슷하며, 이 생명주기에서 지식처리 과정은 각 차원에서 다른 강조점을 지닌 계층으로 잘 나누어진다. 또한 분산된 지식 처리 절차를 체계적이고 재사용할 수 있도록 통합하기 위한 지식 기반 소프트웨어 공학 접근방법을 제공한다.

• 교육시설
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• 제12권1호
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• pp.14-28
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• 2005

Functional school planning has long been considered a fundamental concept of school design. However. in planning educational facilities, it is also important to include the dimensions of comfort, convenience and healthfulness. The school lavatories and drinking fountains are one of most crucial elements for the recent changing face in healthful school design, but the number of lavatories and drinking fountains in most schools may not be sufficient to meet current needs. This study aims to suggest a guideline in designing school sanitary fixture and propose the optimal number of lavatories and drinking fountains regarded to age and sex. The survey is conducted through questionnaires collected from 998 respondents including 300 teachers In ChungNam province. Based on the results of the survey and a formulae, it is suggested that the number of lavatories be required by ratio of 30 boys per unit fixture and 22 girls per unit fixture in the elementary, middle and high school. It is also suggested that the number of drinking fountains be required by ratio of 65 students per unit fixture. The formulae proposed in this paper can be used for other plumbing fixtures required in school facilities.

• 한국조경학회지
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• 제37권5호
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• pp.24-30
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• 2009

일반인들의 접근이 통제되며 도시의 기반시설의 역할을 하던 신월정수장은 서남권의 대표적인 테마체험형 공원으로 조성된다. 도시민에게 휴식공간을 제공할 뿐 아니라 정수장이라는 특수한 기존 성격을 공원 조성에 적극적으로 반영하여 재활용함으로써 도시공원의 새로운 모델을 제시한다. 주변 도시구조와의 단절로 인한 밀집된 주거지의 다양한 요구를 수용할 수 없는 공간구조를 가지고 있으며, 도시속의 섬처럼 떠다니고 있다. 중요한 자원 요소인 숲을 공원의 한 요소로 생각하고 적극적으로 주변 도시구조와 연결하였으며, 도시 공원의 경계를 열고 확장하여 도시민들의 다양한 요구를 수용하고 변화에 유연하게 대처할 수 있는 공원구조를 제안하고자 한다. 장소와 재료를 활용한 계획으로는 기존의 침전조는 몬드리안 정원으로 여과조는 문화센터로 기존연못은 생태적 연못과 소리분수로 기존관사지역은 열린풀밭(Open Green Field)으로 설계하였다.