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Comparing Methods to Select Functional Form in Dichotomous Choice Contingent Valuation Methods
이희찬,Lee, Hee-Chan 한국환경경제학회 2001 자원·환경경제연구 Vol.10 No.1
본 논문의 목적은 양분선택질문형 비시장가치평가법을 통한 편익추정에 사용되는 제 함수의 적합성 여부를 검증하기 위해 사용될 수 있는 방법론들을 비교 검토하는 것이다. 여가수렵의 환경적 요인의 변화에 따른 편익추정에 사용된 함수의 적합성을 판단하기 위해 변이계수접근법, 함수설정 오류 테스트, 그리고 비모수접근법 등이 각 함수에 적용되었다. 결과에 따르면, 편익추정에 이용된 세 가지 로짓함수(선형, 로그, 쉐어모형) 모두 적합한 것으로 판정되었다. 주어진 함수형태에 적용된 세 방법론간에 밀접한 일치성을 보였으며 경우에 따라서는 상호보완적이라는 함축성을 보이기도 하였다 이와 같은 결론은 로짓함수로부터 추정된 값들에 Krinsky-Robb 시뮬레이션을 이용하여 구축한 신뢰구간의 함수간 비교를 통해서도 확인되었다. 주어진 환경 시나리오에 대해 각 함수로부터 도출된 평균 추정치의 신뢰구간이 모두 충분히 중복되었기 때문에 편익추정과 관련하여 함수형태간에 유의적 차이가 없음이 입증된 것이다.
반도체 배선용 저 유전 물질에서의 구리 확산에 대한 전기적 신뢰성 평가
이희찬,주영창,노현욱,윤도영,이진규,차국헌,Lee Hee-Chan,Joo Young-Chang,Ro Hyun-Wook,Yoon Do-Young,Lee Jin-kyu,Char Kook-Heon 한국마이크로전자및패키징학회 2004 마이크로전자 및 패키징학회지 Vol.11 No.3
PMSSQ (Poly Methyl Silsesquioxane)-based matrix에 BTMSE (Bis Tri Methoxy Silyl Ethane) 를 첨가한 low-k물질의 전기적 특성을 조사하였다. 우리는 절연체로 copolymer를 사용하여 금속-절연체 -실리콘 구조를 만들고 BTS 실험을 통하여 누설 전류와 파괴 시간을 측정하였다. 코 폴리머의 기공이 $30\%$ 이상이 되었을 때, 파괴 시간이 급속하게 감소되어 진다. 온도에 관하여 파괴 시간으로부터 코 폴리머를 통한 구리 확산의 활성화 에너지는 1.51eV가 측정되었다. We investigated the electrical properties of copolymer low-k materials that are compromised of the PMSSQ(Poly Methyl Silsesquioxane)-based matrix with the BTMSE (Bis Tri Methoxy Silyl Ethane) additives. We manufactured MIS-type test samples using the copolymer as the insulator and measured their leakage current and failure time by means of the BTS (bias-temperature-stress) test. The failure time was observed to decrease drastically when the porosity of the copolymer was increased over $30\%$. From the measurement of failure time with respect to temperature. the activation energy of Cu drift through the copolymer was calculated to be 1.51 eV.
이희찬(Hee Chan Lee) 한국호텔외식관광경영학회 2009 호텔경영학연구 Vol.18 No.4
The objective of this research was to develop a domestic casino demand model in consideration of substitutive relations in gambles, and to analyze the determinants of casino demand. Applied with the truncated negative binomial model, the key determinants of casino demand have been scrutinized by marginal effect and elasticity. Domestic casino demand formed a significant substitutive relation with sports games, foreign casinos, and adult indoor gamble. In particular, the substitutive elasticity of domestic casinos in respect to foreign casinos and adult indoor gamble turned out to be relatively high. According to an analysis of elasticity, illegal adult indoor gamble caused a decrease of 109 thousand people in casino visit demand, amounting to 48.7 billion won. The impact of demographic characteristics on casino demand appeared to be significantly high in age and education. As regional characteristics of casino visitors, a notable fact was that the residents of Kangwon province exceeded those of other regions in number of casino visits, while the residents of Seoul and the metropolitan area outnumbered those of other districts in length of stay substantially. Types of lodging also had significant correlations with casino visit demand. Visiting motives, another key determinant in casino demand, revealed that casino visitors categorized into the types of `pursuing money only` and `pursuing money with escaping from everyday life` had especially high casino visit demand.
이희찬(Hee-Chan Lee),김현(Kim Hyun) 한국농어촌관광학회 2006 농어촌관광연구 Vol.13 No.2
One purpose of this study is to work out an alternatives to remain proper level of the rural population by analysing the potential demand of urban people hoping migration to rural area, point of view of building up settlement circumstances for the influx of the city people. To accomplish an aim of the study, an author executed cluster analysis by push-pull factor that offects urban people' decision making of moving to rural area and five groups were classified The other aim of this study is to examine if there is a difference among groups segmented by both the restriction dimension and promotion dimension.
이희찬(Hee-Chan Lee),김형곤(Hyoung-gon Kim),김성조(Seong-Jo Kim),유창근(Chang-Geun You),한은진(Eun-Jin Han) 한국농어촌관광학회 2008 농어촌관광연구 Vol.15 No.1
This study is to scrutinize the satisfaction of tourists who participated in rural tourism program provided by rural village, using qualitative approach. For this purpose, in-depth interview with 49 visitors who completed rural experience program was conducted, and their meaning and cognition on rural tourism were analyzed Rural tourists satisfy with and recognize on six aspects-educational demand for their children, reinforcement on bonds between family members, demand for play, consumptive demand for organic food, the authenticity of rurality, and escapable demand from reality.
이희찬(Lee Hee-chan) 한국해양수산개발원 2009 해양정책연구 Vol.24 No.1
Data used in inland water fish demand modeling were characterized by the fact that demand frequencies were non-negative integers. Another issue potentially important for modeling the demand for inland water fishes was the separation of decision to participate from the decision of how many to consume. This paper aimed to analyze the determinants of inland water fish demand in terms of combining a binary probability model for participation and a conditional probability model for positive frequencies. Logit and truncated negative binomial models were utilized to apply for the participation and consumption decisions, respectively. The impact of demographic characteristics on participation decision for inland water fishes appeared to be significantly high in gender, age, and education. As regional characteristics, a notable fact was that the residents of Ulsan, Busan, and Greater Seoul exceeded those of other cities in participation rate for consuming the fishes. Types of perception on inland water fishes also had significant correlations with participation decision. The influence of demographic characteristics on the consumption decision was statistically significant in gender, age, income, and types of job. The residents of Incheon, Daejeon, and Daegu were exceeded by those of other cities in number of consumption. The impact of certain types of perception on consumption decision appeared to be significant. Taste and sanitary thought on the fishes as a choice characteristics was also significant in deciding how many to consume.