• Journal of Navigation and Port Research
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• v.46 no.3
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• pp.191-202
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• 2022

The purpose of this study was to investigate and analyze the perceptions of passengers on various topics related to passenger ship operation, by targeting the passengers (passenger ship consumers) at coastal passenger terminals in three regions, Incheon, Mokpo, and Tongyeong, where many coastal passenger ships operate in Korea. The survey period was October 1-October 11, 2019, just before the outbreak of COVID-19, and the number of samples was 277. The analysis was divided into two elements. Results of the analysis show that, for items islanders as well as the general public did not respond to more than 50% positively, a more in-depth review of policies and fare policies for transportation-disabled facilities through comprehensive fare evaluation such as the excellence of transportation-disabled facilities, the appropriateness of fares, and the appropriateness of fare guidance are necessary. It is expected that this study will contribute to the preparation for re-opening after COVID-19, as well as contribute to public transportation policy.

• Environmental and Resource Economics Review
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• v.31 no.1
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• pp.31-50
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• 2022

This paper estimates the price of standard waste bags that satisfies the polluter pays principle. Unlike previous studies, this paper suggests a method that can find new equilibrium prices using a structural relationship between the demand and cost function for the wastes. To do this, we employ the fixed-point iteration. The main findings of this paper are as follows. Assuming that the polluter pays principle is achieved at the average cost for the waste treatment, the price need to be set at a level about 3.12 times higher than the current one. The estimation result using a structural model, however, shows that the price should be set at a level four times higher than the present. This results are because the quantities reduced of the wastes make the cost per quantity of wastes due to the fixed costs increase. If applying the estimated price to the demand function, the amount of discharge of waste generated nationwide can be reduced by 10%.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.380-380
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• 2022

빗물이용시설은 2014년 「물재이용법」 개정에 따라 시설 확충에 맞춘 획일적인 운영으로 시설수는 증가하고 있으나 대상 시설의 이용량 증가에 대한 부분은 한계를 나타내고 있다. 따라서 설치 의무대상시설에 대한 적정한 시설의 이용현황을 조사 및 분석을 통해 이용시설의 효율적인 운영 및 관리 방안 마련이 필요한 실정이다. 빗물이용시설의 효율적 관리방안 설정을 위해서는 의무 대상시설별 설치 및 운영관리 실태조사, 빗물이용시설관련 기준 검토 및 분석, 빗물이용시설 개선방안 마련의 단계로 방안을 수립하여야 한다. 본 연구에서는 빗물이용시설 기준 검토 및 분석에서 지역별, 수요처별, 용도별 일정 빗물이용 활용률을 확보할 수 있는 빗물이용시설의 평가를 위해 수문학적 물수지 분석을 통한 물수요-공급시계열 분석을 수행하였다. 물수지 분석 툴이 없기 때문에 본 연구를 통해 빗물이용시설 물수지 분석 excel 도구를 개발하였으며, 이를 통해 빗물이용시설 공급충족률(필요수량 대비 빗물이용량), 빗물보장률(전체일수 대비 빗물이용일수), 빗물이용시설 이용률(빗물이용시설용량 대비 빗물이용가능량)에 대해 분석을 수행하였다. 개발한 물수지 분석 excel 도구를 이용하여 현재 설치되고 운영하고 있는 의무대상시설의 운영현황과 도구에서 계산된 활용성 평가 결과의 비교를 통해 현재 운영 현황을 개선할 수 있으며, 다양한 시나리오 적용에 따른 운영 결과를 시설 설치 이전에 확인하여 최적 운영방안 도출에 활용할 수 있을 것으로 판단된다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.06a
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• pp.365-366
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• 2022

This study investigated and analyzed the perceptions of passengers on various topics related to passenger ship operation by targeting the passengers (passenger ship consumers) at the coastal passenger terminals in three regions, Incheon, Mokpo, and Tongyeong, where many coastal passenger ships operate in Korea. . The survey period was from October 1 to October 11, 2019, just before the outbreak of Corona 19, and the number of samples was 277 The analysis was divided into two elements. As a result of the analysis, for items that both islanders and the general public did not respond to more than 50% positively, a more in-depth review of policies and fare policies for transportation-disabled facilities through comprehensive fare evaluation such as the excellence of transportation-disabled facilities, the appropriateness of fares, and the appropriateness of fare guidance. was found to be necessary. It is expected that this study will be able to prepare for re-opening after COVID-19 and be used in public transportation policy.

• The Korean Journal of Air & Space Law and Policy
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• v.35 no.1
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• pp.153-180
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• 2020

This study is meaningful in finding out what legal and policy issues need to be improved in order to foster the aircraft industry, which is relatively underdeveloped compared to the fact that some heavy industries, such as the automobile industry and shipbuilding industry, have achieved a high level of production and technology globally. Korea's aircraft industry has been growing at a slower pace than other industries, largely due to the country's economic growth and the lack of a market structure to properly use variables such as the level of development in related industries, aircraft technology and demand for aircraft manufacturing. While most industries are privately led by the market structure of the competition system, heavy industries such as the aircraft industry generally grow under the market structure of the incomplete competition system, because only by securing huge initial investment costs, high technology, and sufficient demand, they can maintain minimum economic feasibility. The Korean aircraft industry was focused on developing and mass-producing military aircraft focusing on military demand, but it sought to turn the tide by signing the BASA (Bileral Aviation Safety Agreement) with the U.S. A preliminary feasibility study was conducted in 2010 to develop next-generation medium-sized aircraft, but was cancelled due to differences in position with Canada's Bombardier, which is subject to the concourse, and Korea Aerospace Industries (KAI) is pushing for the production of Bombardier's Q400 license on its own. Compared to the mid-to-large sized civil aircraft that are facing difficulties in development, KAI and KARI are successfully developing technologies to unmanned aerial vehicles and civil helicopters. In addition, the unmanned aerial vehicle sector is not yet suitable for manufacturers that have an exclusive global influence, so we believe that it is necessary to pursue government-led research and development projects with a focus on the areas of commercial helicopters and unmanned aerial vehicles in order to foster the aircraft industry in the future. In addition, since military aircraft such as KT-1 and T-50 are currently being exported smoothly, and it cannot be overlooked that the biggest demand for aircraft manufacturing in the Korea is the military, it is necessary to push forward national R&D projects and defense R&D program simultaneously to enable both civilian-military development. However, there are many differences between the two projects in the way they are implemented, the department in charge and the royalty system. Through this study, we learned about the technology ownership and implementation rights of national R&D projects and defense R&D programs, as well as the royalty system. In addition, problems with the system were identified and improvement measures were derived.

• Land and Housing Review
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• v.3 no.2
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• pp.117-126
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• 2012

The purpose of this paper is to analysis spatial locations for public sector's development of mixed-use complex. The results of analysis of location characteristics and public sector's participation conditions are as follows. The central commercial district of new town, surroundings of new railway station, and old town center are likely to be appropriate in the case of a functional mixed-use considering acceptable use in accord with mixed-use complex. Development potential is also high at places such as railway adjacent area in old town and relocation of downtown improper facilities including previous three cases. And development of various size such as lot, block and district can be applied at central commercial district of new town, center and subcenter of old town, surroundings of new railway station. The result of analysis of public sector's participation conditions is appropriate in central commercial district of new town by public sector, relocation of downtown improper facilities and old site of transferring public facilities. They can be contribute to grow up new town by public-private partnership and to improve urban circumstances and publicness by development old site coupled with new site of transferring public facilities.

• Environmental and Resource Economics Review
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• v.21 no.1
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• pp.93-127
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• 2012

We estimate how much KEPCO can save their loss and how much social welfare can be increased by applying the real-time pricing instead of current regulated retail price in the electricity market in order to analyze the problem of the regulated retail price which is fixed below the marginal cost. We estimate the demand functions of peak time and off-peak time in summer (June to August) and winter (December to February). We construct the supply function based on hourly step-wise linear marginal cost functions, too. We find that the increase of social welfare will be 67 billion won in summer if the fixed retail price is changed into the real-time pricing scheme. The total 705 billion won will be transferred from consumer surplus to producer surplus and the rest (67 billion won) will be saved from the reduction of deadweight loss among KEPCO's loss. In winter, the increase of social surplus will be 225 billion won and 1,174 billion won of KEPCO's loss will be transferred from consumer surplus. As a result, we conclude that the regulation of the retail price in the electricity market induces the social welfare loss and KEPCO suffers a huge loss.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.11a
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• pp.155-158
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• 2010

급증하고 있는 이동 멀티미디어 방송 콘텐츠 서비스의 수요에 발맞추어 이 서비스를 이용하는 사용자들을 효율적으로 관리하는 방안에 대해 관심이 집중되고 있다. 1991년 Chaum과 van Heyst에 의해 소개된 그룹 인증 관리 기법은 익명성의 보장이나, 관리상의 편의로 인해 앞에서 언급된 문제를 해결하는 데 중요한 역할을 할 것으로 예상되었다. 하지만, 이후 소개된 몇개의 그룹 인증 관리 기법들이 실제로는 익명성을 보장하지 못 하거나, 외부 그룹에 의해 악용될 수 있다는 점이 증명되어, 그룹 인증 관리 기법을 실제로 응용하기 이전에 안전성 보장을 위해 요구되는 적합한 기준들을 선정하고, 이 기준에 부합하는지를 살펴보는 일이 더욱 시급한 문제로 대두되었다. 이에 본 논문은 이동 멀티미디어 방송 콘텐츠 서비스를 이용하는 사용자들을 그룹 인증 기법으로 관리하는 데 있어, 요구되는 안전성 조건과 이에 적합한 그룹 인증 기법을 소개하고, 실제로 소개한 그룹 인증 기법이 본 논문에서 선정한 안전성 조건에 부합하는지를 증명하였다. 더불어, 그룹 인증 기법을 실제 효과적으로 응용할 수 있는 비즈니스 모델을 제안하여 그룹 인증 기법의 효용 및 앞으로의 개발 방향을 제시하였다.

• Journal of Korea Technology Innovation Society
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• v.3 no.2
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• pp.61-77
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• 2000

우리 나라는 90년대에 들어서 향후 2015년까지 세계 10위권의 선진우주국에 진입한다는 우주개발중장기목표를 설정하고 중간 추진단계로서 2005년까지 국내기술에 의한 저궤도위성 및 발사체를 개발한다는 목표를 세우고 있다. 그리고 이를 위한 구체적인 시행 프로그램으로서 KSR-I및 KSR-II사업을 추진하여 성공적으로 완료하였으며, 이제 2002년까지 KSR-III사업으로 3단형 액체추진로켓을 개발 중에 있다. 현재 세계 우주 발사체 시장은 저궤도위성의 수요가 급증함으로서 전 세계적으로 저가의 우주발사체 개발을 서두르고 있으며, 우주선진국들은 경쟁적으로 기술혁신을 추진하고 있다. 그러나 개발도상국가들이 이에 참여하는데 있어서는 G7선진국들이 이미 마련한 MTCR(Missile Technology Control Regime)규제에 의거 기술이전 및 부품수입이 어렵기 때문에 자력에 의한 발사체 개발이 불가피하다. 본 고에서는 우주발사체 주요 선개발국 8개국의 기술혁신 과정과 정책 및 추진체계 등을 분석하고, 국내 발사체 개발에 참여하고 있는 주요 7개 민간기업을 대상으로 실시한 설문조사와 현장 실태조사를 바탕으로 기술혁신을 촉진하는 구체적인 정책대안 및 목표년도에 성공적인 발사를 위한 개선방안을 제시하였다.

• 월간 기계설비
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• s.292
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• pp.70-78
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• 2014

가락동 농수산물도매시장은 지난 1985년 개설된 국내 최초 공영도매시장이자 연간 230만톤 거래 규모의 세계 최대 도매시장으로 서울시민 농수산 먹거리의 약 50%를 담당하고 있으며 전국 공영도매시장 물량의 약 33%를 처리하는 등 전국 농수산물 유통의 중추 기능을 담당하고 있다. 가락시장은 5,000여개 유통업체가 영업 중이며 하루 이용객은 13만명, 출입차량은 6만7,000대에 달할 정도로 과부하를 겪고 있다. 또한 도시 주거환경을 저해하는 혐오시설로 치부돼 이전 압박을 받아왔으며 전반적인 시설 노후화와 유통 수요에 부적합한 물류구조, 주변 교통정체 야기 등의 문제로 시설현대화 필요성도 제기되어 왔다. 이에 따라 서울시농수산식품공사가 지난 2009년 재건축을 통한 시설현대화 사업을 발표하고 기존의 시장 기능을 유지하면서 재건축을 하는 순환식 시설현대화 사업을 3단계(당초 계획은 2009년~2018년까지 10년 예상했으나 가락시장 계획변경 타당성 검토용역 결과에 따라 2025년까지 지연될 것으로 예상됨)에 걸쳐 추진키로 했다. 이에 따라 1단계 사업은 지난 2011년 6월부터 진행되어 2015년 2월 준공 예정이다. 본지는 가락시장 시설현대화 1단계 공사에서 기계설비 및 소방공사를 담당한 (주)성아테크(대표 정해돈) 이완식 현장소장과 시공사인 대림산업(주) 박승재 현장소장을 만나 현장 이야기를 들어 보았다.