• 한국건축시공학회지
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• 제5권1호
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• pp.63-68
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• 2005

Generally, aggregate may limit the workability, strength and durability of concrete, and good concrete cannot be made with aggregate of bad property including low strength, bad shape and grading. But recently, it has been insufficient in quantity to collect good natural aggregate because of exhaustion of aggregate resources. In case of Korea, the using ratio of crushed stone occupies about 97 percent of total coarse aggregate, and ratio of crushed sand occupies about 18.3 percent of total fine aggregate. This is an experimental study to compare and analyze the properties of crushed sand for concrete in capital region and concrete according to the replacement ratio of crushed sand to improve quality and mix design of concrete using crushed sand. According to test results, it was found that nearly all the properties of crushed sand satisfied with the value recommended by KS. And it is recommended that FM of crushed sand should be lowered by improvement of manufacture system or grading adjustment should be used because FM of crushed sand was a bit higher.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2004년도 학술.기술논문발표회
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• pp.51-55
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• 2004

Generally, aggregate may limit the strength of concrete, and aggregate with undesirable properties including strength, shape and grading etc. cannot produce good concrete. Also, the properties of aggregate greatly affect the durability and structural performance of concrete. Recently, it has increased the using of crushed aggregate for concrete due to the exhaustion of good natural aggregate. In case of Korea, the using ratio of crushed stone occupies about 97％ of whole coarse aggregate, and ratio of crushed sand occupies about 18.3％ of whole fine aggregate. This is an experimental study to compare and analyze the properties of crushed sand for concrete in capital region and concrete according to the replacement ratio of crushed sand to do suitable mix design and improve the concrete quality. According to results, it was found that nearly all the properties of crushed sand satisfied with the value recommended by KS.

• 자원ㆍ환경경제연구
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• 제12권1호
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• pp.1-27
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• 2003

Urban forests have various environmental benefits, contributing to the quality of urban life. However, these values have been underestimated or never been reflected in the urban development planning in Korea. As a result, a number of forests in urban areas were either partly or wholly destroyed without their public's values being assessed explicitly. The objective of this paper is to estimate the economic benefits attached to Mt. Kwanggyo in the Capital Region using contingent valuation method, aiming to provide policy-makers with useful information to make an informed public decision in urban development planning. The survey was carefully designed and implemented to meet a number of recommendation rules suggested in the literature. The overall results show that the respondents well accepted the contingent market and would be willing to pay a significant amount for the proposed program of conserving the mountain. Total economic benefits for the population amounted to approximately 3.8 billion Korean won per year. This quantitative information can be used in cost-benefit analysis of urban development plans.

• 한국철도학회논문집
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• 제13권1호
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• pp.125-130
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• 2010

정부는 수도권 집중화로 인해 야기되는 각종 사회문제들을 해결하기 위해 주변지역의 개발을 통한 서울 집중화를 분산시키려는 노력을 하고 있지만, 수도권의 구먹구구식 철도개발은 주변지역에서 서울중심으로의 접근을 어렵게 만들고 있다. 이에 국내 최초로 완행, 급행열차가 혼용 운행하는 서울9호선 운영계획을 통하여 "주변지역으로부터 서울도심으로의 접근성 향상"과 "다양한 열차 패턴 서비스" 등과 같은 승객서비스질 향상에 대해 생각해 보고자 한다.

• The Journal of Asian Finance, Economics and Business
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• 제7권8호
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• pp.33-40
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• 2020

The main aim of the study is to test a house pricing model by combining hedonic and asset-based pricing models. An understanding of the relationship between house pricing and its return (the rental income) helps to establish houses as a significant asset class. The model tested the relationship between house pricing (dependent variable) and the house attributes (independent variables) derived from Freeman's framework of housing attributes. This study uses a large data-set of 1,899 sample of new, high-end houses purchased between 2016 and 2019 collected from the national capital region of India (Delhi-NCR). The algorithm was built in R-Script, and stepwise multiple linear regression was used to analyze the model. The analysis of the model proves that the three significant variables, namely, carpet area, pay-off, and annual maintenance charges explain the price function. Further, the model is statistically fit. The major contribution of the study is to understand the key factors and their influence on the house pricing. The model will be helpful in risk assessment in the housing investment and enhance the chances of investment. Policy-makers can use information about the underlying valuation drivers of the house prices to stabilize the market and also in framing the tax policies.

• 한국조경학회지
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• 제31권1호
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• pp.11-22
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• 2003

This landscape design proposal was presented to a design competition for the Incheon-city Southern Region Integrated Disposal Treatment Facility. The site is located in Dongchun-dong, Yeonsu-gu, Incheon. The main design concepts are as follows: First, considering connection of the site with surrounding water, inner sea is designed as an environmentally friendly place and as a leisure-sports theme park in which several sports facilities and relaxing places are arranged. It is also designed for everyone: people of all ages, disabled, workers, visitors and local residents. The design was processed on the basis of survey, analysis of surrounding competing facilities and SWOT analysis. Second, the ecological planting model was developed by analyzing the natural vegetation map in the surrounding area and planted vegetation types in the seaside reclamation area. The model was then applied to the ecological community, park area and roadside trees, so as to harmonize with the local habitat. Third, the project is intended to launch private capital for managing the sports park and golf course. This will enable a entrepreneur to make flexible plans for golf training field that is expected to yield a good financial return. It is expected that this design would serve the local residents as a symbolic, environmentally friendly leisure-sports theme park.

• 노동경제논집
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• 제42권3호
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• pp.39-74
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• 2019

본 논문에서는 2007~2013년 "대졸자직업이동경로조사" 데이터와 Dahl(2002)의 준모수적 방법론을 사용하여 선택편의를 보정한 대졸자들의 취업 초기 임금함수를 추정하고, 각 계수의 지역 간 차이가 선택편의에 기인한 것인지 검증하고자 하였다. 분석 결과, 선택편의를 보정하더라도 성별에 따른 임금 프리미엄의 지역 간 차이는 큰 변화가 없으며, 학력, 전공에 따른 임금 프리미엄의 지역 간 차이는 각각 약 18%, 11% 감소하여 여전히 지역 간에 큰 차이가 존재하는 것으로 나타났다. 한편, 서울 및 경기 지역에 대해서는 선택 편의가 미미한 것으로 나타나 대졸청년층의 수도권 선호 경향은 성별, 학력, 전공 등 노동자들의 특성에 별다른 관계없이 일반적인 것으로 보인다.

• 유통과학연구
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• 제14권2호
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• pp.135-144
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• 2016

Purpose - The purpose of this paper is to empirically investigate the moderating effects of social capital on antecedents factors path of export performance in the materials and components SMEs(Small and Medium-sized Enterprises) of Busan and Kyungnam region. In case of materials and components SMEs, they are always trying to achieve business performance including export sales and market share, but it is difficult for them to increase performance due to the limitation of inner & tangible resources. Therefore intangible asset such as technology capability and its antecedents factors which are technology innovation and learning orientation are getting more important to SMEs. In addition, it is supposed that social capital such as local network including distribution channel in overseas market plays an essential role to enhance export performance. Accordingly, the main goal of this study is to find out the relationship between export performance and antecedents factors and the validity of social capital as a moderating valuable. Research design, data, and methodology - Technology innovation, learning orientation and technology capability have been used as antecedents factors for export performance and social capital such as network diversity and intensity has been used for moderating effects analysis. In order to select these valuables mentioned above, this study examined the existing researches on a basis of Resources Based View, Organizational Learning Theory and Social Capital theory. To achieve the objective of this paper, 7 hypotheses including the moderating effects have been proposed with 6 potential variables measured by 24 questions. The survey was carried out from December 2014 to March 2015 and 137 samples out of total 175 were selected for the analysis. PLS(Partial Least Squares) has been used for the methodology of empirical analysis for both antecedents factors path and moderating effects. Results - Research findings are as follows. First, technology innovation has a significant impact on learning orientation, learning orientation has a positive effect on the technology capability and technology capability also has a significant impact on export performance. Therefore 3 valuables are proved as antecedents factors of export performance. Second, the social capital(both network diversity and intensity) plays a moderating role with learning orientation to technology capability. However, there is no moderating effects between both of social capital and technology capability regarding export performance. Conclusions - According to path analysis results, it is suggested that the materials and components SMEs should raise technology innovation and learning orientation in order to improve technology capability and export performance. Meantime, the moderating effect analysis shows that SMEs should consider local network diversity and intensity along with learning orientation to add up technology capability. But local network diversity and intensity does not work systematically with technology capability for export performance and it means that SMEs should find the appropriate local partners for the purpose of establishing concrete distribution channels based on marketing perspective, not for improving technology capability.

• 디지털융복합연구
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• 제18권5호
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• pp.25-31
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• 2020

본 연구는 우리나라 광역시와 도를 중심으로 1995-2017년의 지역별 패널통계를 활용하여 노동력 고령화가 인적자본 취업비중과 1인당 지역총생산에 미치는 영향을 분석하였다. 지역별 고정효과를 반영한 2단계 최소자승 패널 회귀 분석 결과에서 노동력 고령화는 광역시의 인적자본 취업비중과 1인당 지역총생산에는 영향이 없는 반면, 도의 인적자본 취업비중과 1인당 지역총생산은 유의한 수준에서 감소시키는 것으로 나타났다. 또한 서비스 사업체 비중은 광역시의 인적자본 취업비중에 긍정적 영향을 미치지만 도에서는 그 효과가 유의하지 않게 나타났으며, 광역시에서는 인적자본 취업비중이 1인당 지역총생산 증가에 유의하게 기여하고 있지만 도의 경우는 물리적 자본이 1인당 지역총생산 증가에 유의하게 기여하고 있는 것으로 나타났다. 이와 같은 광역시와 도에 따른 다른 분석결과는 노동력 고령화에 대응하는 인적자본과 1인당 지역총생산 증가를 위한 광역시와 도의 최적화된 정책은 지역에 따라 차별화시켜야 함을 시사한다.

• 노동경제논집
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• 제24권1호
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• pp.1-33
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• 2001

교육은 일반적으로 긍정적 외부효과를 가진 것으로 인식되어 교육에 대한 공공투자가 정당화되고 있다. 본 연구는 1995년 인구주택총조사와 1998년 한국노동패널을 이용하여 도시별 산업별 인적자본의 분포를 살펴보고 도시와 산업의 평균교육년수가 임금에 미치는 영향을 파악함으로써 인적자본의 외부효과를 분석하였다. 일반적으로 수도권 도시들의 평균교육년수가 다른 지역 도시들에 비해 크게 높았으며, 또 첨단산업의 평균교육년수가 전통산업의 평균교육년수보다 크게 높았다. 교육과 경력을 포함한 개인의 특성, 기업규모, 지역특성, 산업을 통제한 후 도시의 평균교육년수가 1년 증가함에 따라 그 도시의 노동자의 임금이 약 3% 중가하고 개인의 특성, 기업규모, 산업 특성을 통제한 후 산업의 평균교육년수가 1년 증가함에 따라 그 산업 노동자의 임금이 약 5~7% 증가한다.