• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2008년도 춘계학술대회 논문집
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• pp.85-88
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• 2008

The purpose of this study is to analyze daylight distribution and light characteristics on the Ma-ji and Roller Shade fabric, and to investigate a possibility of using it as a shading system. Using a 1/2 Mock-up model, daylight distribution is analyzed with the Ma-ji and Sun-ji (Korean traditional paper) which have good efficiency and less glare. Ma-ji has the best daylight distribution, so that daylight experiment is conducted with the Ma-ji and Roller Shade fabric. In current office buildings and apartment houses, daylight characteristics of Korean traditional paper windows could be used as preliminary data to develop a window system which makes better daylight performance.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 추계학술대회 논문집
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• pp.125-130
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• 2007

The aim of this study is to discover the possibility as the shading systems, and to analyze daylight distribution and characteristic of light on the Korean traditional paper. Korean traditional paper has a good efficiency to diffuse the light and is less glare than Roller Shade fabric. In the president office buildings and apartment houses, daylight characteristic of Korean traditional paper windows could be used as a preliminary data to develop a window system which makes greatest performance of daylight.

• 건축역사연구
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• 제10권4호
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• pp.23-41
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• 2001

This paper aims at understanding the transformed characteristics of expressional system of Church architecture in Korean traditional style. Through the analysis of transformed forms and its meanings of those, this paper investigates the unique process of stylistic development of Korean traditional church architecture in early modern, 1900's. The method of this study is the analyse of them after the actual field surveys of Korean traditional churches, specially eclecticism churches as the HWSAN church and KUPODONG church, and the analysis of Semiology. Theory for Semantic Interpretation of artistic objects as an objects of art and architecture. Specially, the survey concentrates on the architectural elements(the form, the architectural structure, the material, the roof shape, the window, the door, the bell tower, the plan, etc) of eclecticism churches, especially those of HWASAN church and the analysis of semiology theory contains the research results which were studied by theorists as Charles Jencks, Umberto Eco and Juan Pablo Bonta. Acceding to analysis, Korean eclecticism churches have the unique transformation process and specific meaning of the spontaneous process of development. In the results of the semiological analysis of HWASAN church, it can be revealed clearly that transformed process of form리 characteristics of HWASAN church intented to formal originality of western Gothic church, but its form and meaning were based not on any simply imported western style but on existing system of Korean architecture.

• 조명전기설비학회논문지
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• 제22권2호
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• pp.26-34
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• 2008

본 논문에서는 전통한지의 주광유입 및 광특성 평가를 통해 차양장치로써의 가능성을 발견해 보고자 한다. 먼저 외암 민속마을의 건재고택을 실측하여 전통가옥에서의 한지창호의 주광성능을 분석하였다. 그리고 광박스를 제작해 전통한지와 Roller Shade 패브릭의 광성능을 실험 평가하였다. 그 결과 전통한지는 Roller Shade 패브릭에 비교하여 건축물의 환경 측면에서 직사일광의 유입을 차단하고 빛을 확산시켜 눈부심을 줄여주는 효용성을 가지고 있음을 알 수 있었다. 이에 본 연구는 현대 건축의 사무소나 공동주택에서 전통한지창호의 주광특성을 이용하여 주광성능을 극대화할 수 있는 창호시스템을 개발하기 위한 기초자료로 활용될 것이다.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2007년도 춘계종합학술대회
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• pp.336-339
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• 2007

기존의 데이터베이스 관리시스템(DBMS)은 스트림 데이터에 대한 연속질의를 고려하지 않고 설계되었기 때문에, 환자 모니터링 시스템과 같은 스트림 기반 응용에서의 요구를 만족하기 위해서는 새로운 질의 모델이 요구된다. 환자 모니터링 시스템은 혈압과 온도와 같은 다양한 유형의 생체 정보가 처리되어야 하며, 생체 센서로부터 측정된 생체 정보는 스트림으로 처리되어야 한다. 이 논문에서는 환자 모니터링 시스템에서 사용 될 수 있는 모든 형태의 질의를 4가지 유형으로 분류하였다. 그리고 이러한 4가지 유형의 질의를 표현 할 수 있는 새로운 슬라이딩 윈도우 질의 모델을 제안하였다.

• 한국정보컨버전스학회:학술대회논문집
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• 한국정보컨버전스학회 2008년도 International conference on information convergence
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• pp.199-204
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• 2008

Sensor nodes have various energy and computational constraints because of their inexpensive nature and ad-hoc method of deployment. Considerable research has been focused at overcoming these deficiencies through faster media accessing, more energy efficient routing, localization algorithms and system design. Our research attempts to provide a method of improvement MAC performance in these issues. We show that traditional carrier-sense multiple access(CSMA) protocols like IEEE 802.11 do not handle the first constraint adequately, and do not take advantage of the second property, leading to degraded latency and throughput as the network scales in size, We present more efficient method of a medium access for real-time wireless sensor networks. Proposed MAC protocol is a randomized CSMA protocol, but unlike previous legacy protocols, does not use a time-varying contention window from which a node randomly picks a transmission slot. To reduce the latency for the delivery of event reports, it carefully decides a fixed-size contention window, non-uniform probability distribution of transmitting in each slot within the window. We show that it can offer up to several times latency reduction compared to legacy of IEEE 802.11 as the size of the sensor network scales up to 256 nodes using widely used simulator ns-2. We, finally show that proposed MAC scheme comes close to meeting bounds on the best latency achievable by a decentralized CSMA-based MAC protocol for real-time wireless sensor networks which is sensitive to latency.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 추계종합학술대회 논문집(2)
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• pp.124-127
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• 2000

With increasing design complexity, shrinking time-to-market window, and various demands from markets, the traditional design methodologies reach-ed a ceiling. In a search for a way to tackle these problems, novel concepts and methodologies have been proposed in the past years. The paper briefly presents the design issues, and concepts, introduces commercial tools, and finally proposes a conceptual methodology that addresses the issues.

• KIEAE Journal
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• 제6권1호
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• pp.25-32
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• 2006

Regarding to the Domestic housing politics to improve residing environment and effective use of country land, apartment buildings have been constructed since early of 1970s. Now apartment is taking over 50% out of entire housing in Korea. In the view point of PV application to the apartment, PV has amny advantages because of the wideness of out-walls and high floors building in APT. Therefore, if APT could use the electricity produced by BIPV, we can solve more easily environment and energy problems caused by housing. The research conclusion by analysing conditions and application method to introduce BIPV application to APT in near future is as below. -The out look of APT has been developed periodically and recently gable roof or canopy is popular which PV installation is more favorable. -For Balcony part with double skin facade sassy window, It has a preferable condition to install on the wall depending on the window direction. -In case of shorter distance between buildings due to high ratio of outside measurement, it is more desirable to install PV on the roof than on the wall of Apartment by considering low solar altitude. -Also depending on the direction of APT building, it is more effective and productive in electricity in the broad surface of side wall of APT. -In case of superhigh floor APT where facade system is mostly double skin facade of curtain wall system, PV module can replace the traditional curtain wall and will reduce architectural materials and obtain various out look design thereof.

• 한국기계가공학회지
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• 제20권12호
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• pp.92-99
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• 2021

The ever-growing demand for enhanced competitiveness of engineered systems require designing in quality strategies that can efficiently incorporate multiple design attributes into a system. In a robust design, there must be consideration for any uncontrollable factors that should not be disregarded in the design process. Studies on multi-attribute design challenges usually assume mutual utility independence amongst the design attributes. However, mutual utility independence does not exist in every design situation. In this study, a new robust design methodology that has two utility-dependent attributes are presented. The proposed method was then compared with a traditional robust design that utilizes a wave soldering process design. The results of this case study indicate that the proposed method yields a better solution than the traditional method.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
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• pp.1021-1024
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• 1993

System identification is a major component for a control system. In biosystems, which is nonlinear and dynamic, precise identification would be very helpful for implementing a control system. It is difficult to precisely identify such non-linear systems. The measurable data on products from 2,3-butanediol fermentation could not be included in a process model based on kinetic approach. Meanwhile, a predictive capability is required in developing a control system. A neural network (NN) dynamic identifier with a by/(1＋ t ) transfer function was therefore designed being able to predict this fermentation. This modified inverse NN identifier differs from traditional models in which it is not only able to see but also able to predict the system. A moving window, with a dimension of 11 and a fixed data size of seven, was properly designed. One-step ahead identification/prediction by an 11-3-1 BPNN is demonstrated. Even under process fault, this neural network is still able to perform several-step ahead prediction.