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- 저자 : 김곤 (검색결과 271 건)
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김곤,김정태 대한설비공학회 2007 설비공학 논문집 Vol.19 No.7
An architectural means of optimal daylight distribution is by using so-called light shelf systems, horizontal shading and redirecting devices. The overall performance of the daylighting system can be improved by the incorporation with electric lighting control devices. This paper aims to exemplify the benefit of daylighting in term of economic consideration. In such a case a reasonable technique to compare system costs is by life-cycle costing. Stated simply, a life-cycle cost represents the total cost of a system over its entire life cycle, that is, the sum of first cost and all future costs. Four different electric lighting system designs are proposed and a lighting control system that is continuously operating according to the level of daylight in the space has been adapted. The result shows clearly that although denser layout of lighting fixtures might be more effective to interface to the level of daylight ceaselessly changeable, its economic benefit may not meet the expected criterion the reason of increased initial investment and maintenance cost for the fixtures and control devices.
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김곤,양재군,배재학,이종혁 한국정보처리학회 2004 정보처리학회논문지. 소프트웨어 및 데이터 공학 Vol.11 No.5
Sentence abstraction is a simplification of a sentence preserving its communicative function. It accomplishes sentence revision and concept abstraction simultaneously. Sentence revision is a method that resolves the discrepancy between human’s thoughts and its expressed semantic in sentences. Concept abstraction is an expression of general ideas acquired from the common elements of concepts. Sentence abstraction selects the main constituents of given sentences and describes the upper concepts of them with detecting their semantic information. This enables sentence revision and concept abstraction simultaneously. In this paper, a syntactic parser LGPI+ and an ontology OfN are utilized for sentence abstraction. Sentence abstracter SABOT makes use of LGPI+ and OfN. SABOT processes the result of parsing and selects the candidate words for sentence abstraction. This paper computes the sentence recall of the main sentences and the topic hit ratio of the selected sentences with the text understanding system using sentence abstraction. The sources are 58 paragraphs in 23 stories. As a result of it, the sentence recall is about 54~72% and the topic hit ratio is about 76~86%. This paper verified that sentence abstraction enables sentence revision that can select the topic sentences of a given text efficiently and concept abstraction that can improve the depth of text understanding. 문장추상화(Sentence Abstraction)는 문장의 의사전달 기능이 보존된 단순화이다. 이는 문장교열(Sentence Revision)과 개념추상화(Concept Abstraction)를 동시에 가능하게 한다. 문장교열은 사람이 생각한 바와 문장으로 표현된 의미의 차이를 해결하는 방법이다. 개념추상화는 개념들의 공통된 요소로부터 얻은 보편적인 관념을 표현하는 것이다. 문장추상화는 문장의 주요구성성분들을 선별해 내고, 이들의 의미적인 정보를 파악하여 상위개념을 표현함으로써 문장교열과 개념추상화를 가능하게 한다. 본 논문에서는 문장추상화를 위한 구문분석기 LGPI+와, 온톨러지 OfN을 구체화하였다. 문장추상기 SABOT는 LGPI+와 OfN을 활용하며, 구문분석 결과를 처리하여 문장에서 추상화 할 후보단어를 선택한다. 문장추상화를 활용한 원문이해 시스템으로 23개 이야기의 58개 문단에 대해 중요 문장에 대한 문장재현율과 선별된 문장들의 주제관련성을 확인해 보았다. 실험결과, 문장재현율은 54~72%의 범위이었고, 주제관련성은 76~86% 정도의 비율로 나타났다. 이를 유사 시스템과 비교해 보았을 때, 약 10~20% 정도의 성능향상을 보인다. 본 논문에서는 문장추상화를 활용하여 글의 화제문을 효율적으로 선택할 수 있는 문장교열과 원문의 이해심도를 보다 더 깊게 할 수 있는 개념추상화가 가능함을 확인하였다.
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아트리움 건물의 중정 내부 발코니의 채광 특성에 관한 연구
김곤,구재오 대한건축학회 2005 대한건축학회논문집 Vol.21 No.7
Designers who predict daylighting performance in atrium spaces usually assume that the atrium space is empty. In commercial, industrial and institutional atrium buildings, light attenuation caused by interior obstructions can affect working efficiency and in extreme cases, safety. In the initial stage of the daylighting design process, the impact and light attenuation caused by major interior obstructions should be considered on the basis of other critical design factors to improve the accuracy of prediction of whether the light level in atrium spaces is adequate for typical general tasks and plant growth. The objective of this research is to develop insights and design guidance regarding the critical daylighting performance factors by evaluating the relative impact of various interior balcony configurations on illumination level and its distribution with different atrium geometries and wall reflectances. For these, parametric measurements of illumination level with a scale model of four-sided atrium building have been conducted under overcast sky condition within the sky simulator at a Texas University. This research represents the atrium performance results in terms of Daylight Factor, well index, balcony well index, the configuration of interior balcony, and interior reflectance and the results are compared with basecase atria without interior balcony.
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