금형면 자동 다듬질 장치의 D/B 구축을 위한 실험적 연구

조성만(Sung Man Jo),안유민(Yoomin Ahn),조남규(Nahm Gyoo Cho),한창수(Chang Soo Han),박균명(Gyun Myoung Park) 한국공작기계학회 2000 한국공작기계학회지 Vol.9 No.2

우리나라 전력산업의 시장지배력 연구

조성한 ( Sung Han Jo ),김강식 ( Kang Sik Kim ) 한독경상학회 2012 經商論叢 Vol.30 No.4

국내 발전시장은 발전경쟁 단계로서 한수원, 5개 발전회사, 기타 발전회사들이 참여하고 있으며 모든 전력이 전력거래소에서 거래되고 있다. 2003년부터 2011년까지 실질경제성장율은 평균 3.8%인 반면 같은 기간 동안 최대전력수요는 평균 5.3% 증가하였다. 한편 전력 총판매량은 2003년에 293,599GWh와 2011년 455,070 GWh로 2003년부터 2011년까지 평균 5.6% 증가하였다. 또한 판매단가는 2003년에 74.7원/kWh과 2011년은 89.3원/kWh으로 2003년부터 2011년까지평균 2.1%만이 증가하였다. 한수원의 점유율이 평균 36.75%로 나타나고 있으며 5개 발전회사의 점유율은 평균 10%대를 보여주고 있다. 2003년 1월부터 2011년 9월까지의 자료를 사용하여 발전시장의 구조와 성과를 살펴보았다. 발전시장의 집중률은 평균 61.94%를 기록하고 있으며, 허핀달지수는 평균 0.2072%를 나타내고 있다. 지니계수의 조사기간 평균은 37.30%이며 지니계수는 점차 감소하는 경향을 보여 주고있다. 발전시장의 매출총이익은 평균 18.89원이며, 시간이 지나감에 따라 감소하는 경향을 보이고 있다. 발전시장의 매출총이익율은 평균 34.69%이며, 시간이 지나감에 따라 감소하는 경향을 보이고 있다. 모형에서 추정된 결과로는 이윤율과 집중률과의 관계는 유의적인 정(+)의 관계가 추정되었다. 집중률의 추정계수는 2.2302로 1% 수준에서 유의하며 정(+)의 관계를 가진다. 즉 집중률이 1% 상승(하락)할 때에 매출총이익율이 각각 2.2302%씩 증가(감소)한다는 것을 보여준다. 이는발전시장에 시장지배력이 존재함을 보여주고 있는 것이며 이윤율은 집중율이 상승함에 따라 증가함을 보여주고 있다. 이는 시장지배력의 완화와 공정한 경쟁환경 조성을 위한 규제체계 정비가 시급함을 시사하고있다. 한수원의 시장점유율을 낮출 수 있는 방안을 마련하고 구조개편의 최종목표인 소매경쟁단계로의 전환을 위해서는 발전시장 내의 회사들의 규모가 비슷하게 유지될 수 있도록 해야한다. 또한 시장메커니즘이 작동할 수 있도록 시장진입 등 전력산업에 대한 관련 규제의 완화가 필요하다. 그리고 전력시장에서의 반경쟁적 행위나 불공정거래행위 등을 감시할 수 있는 시장감시체제가 제대로 작동해야 한다. In the process of electricity industry restructuring, the Korean electricity market has been in operation at a generation competition stage. There are one nuclear company, 5 generating companies, and IPPs in the market. They are competing each other by the cost-based pool rules and selling all electricity to the Korea Power Exchange (KPX). From 2003 to 2011, the average real economic growth rate was 3.8% but the average growth rae of the maximum electric power demand was 5.3% in the same period. The power sales of 2003 and 2011 was 293,599GWh and 455,070GWh respectively, and the average growth rate of power sales was 5.6% from 2003 to 2011. And the average unit sale price of power was 74.7won/kWh in 2003 and 89.3won/kWh in 2011, and the average unit sale price was increasing by 2.1% only from 2003 to 2011. This paper tackles an empirical analysis about market performance and market structure using the Korean generation market data from January 2003 to September 2011. Market concentration rate(C3) is about 61.94%, and Herfindahl index shows around 0.2072 in the generation market. The nuclear company alone represents on average 36.75%. The Gini coefficient, which is the recognised measure of inequality, was 37.30% and was declining over time. The average gross margin on sale of power was 18.89won and was declining over time. The average gross margin ratio on sale of power was 34.69% and was also declining over time. It is estimated that there is a strong positive relationship between market concentration rate and profitability. The coefficient of concentration ratio is 2.2302 and is positive and statistically significant at the level of 1 percent. It implies that as market concentration rate increases, the profitability of generation companies improves. In order to make electricity market more competitive and mature, decreasing the nuclear company`s concentration rate, maintaining the size of 5 generating companies, and lowering market entry barrier are needed. Besides, the functions and duties of KOREC(regulator) for the wholesale power market should be readdressed in the context of deregulation and fair competition.

통신서비스산업의 국민경제 기여도 분석에 관한 연구

조성한 ( Sung Han Jo ),박동진 ( Tong Jin Park ) 한국정보시스템학회 2007 情報시스템硏究 Vol.16 No.1

공공부문 조직문화 연구에 대한 비판적 고찰

조성한(Jo Sung Han),주영종(Joo Young-jong) 한국조직학회 2007 한국조직학회보 Vol.4 No.1

원자력발전소 주요기기에 대한 감시 및 예측진단 기술 적용성 고찰

조성한(Sung-Han Jo),이재기(Jae-Ki-Lee),김형관(Hyoung-Gwan Kim) 제어로봇시스템학회 2011 제어·로봇·시스템학회 논문지 Vol.17 No.11

The major goal of nuclear power industries during past 10 years has been increasing reliability and utility capacity factor. But as capacity factors crept upward, it became harder and harder to attain next percentage of improvement. Therefore, other innovative technologies and method are required. The monitoring, diagnostic and prognostic technologies have been applied to the fossil power plants and contributed a lot on improving their reliability and performance. However nuclear industries are still reluctant to apply the technology by several reasons. In this paper, current preventive maintenance status of nuclear power plants and industrial practice of monitoring, diagnostic and prognostic technologies are investigated. In addition, the restriction in the implementation of the technologies to the nuclear power plants are defined. Finally, we suggest appropriate methods of implementing the technology to nuclear industries for improving current reliability and performance.

DEA를 이용한 국립대학도서관 경영효율성 분석

조성한,박동진,이길호,윤동원,Jo, Sung-Han,Park, Tong-Jin,Lee, Gil-Ho,Yoon, Dong-Won 한국도서관정보학회 2009 한국도서관정보학회지 Vol.40 No.1

효율성은 산출물의 가치와 그 산출물의 생산과정에서 소요되는 투입물가치의 비율로 나타낸다. DEA모형은 효율성을 여러 가지 투입물의 가중평균에 대한 산출물 가중평균의 비율로 표시하며, 특정 의성결정단위의 효율성을 유사한 투입 산출구조를 가지는 준거집단과 비교함으로써 상대적인 측면에서 측정하는 방법이다. 본 연구는 DEA모형을 이용하여 국립대학도서관의 효율성과 효율성 개선에 관한 분석을 시도하였다. 투입변수로는 직원수, 시설면적, 예산, 장서량을 사용하였고, 산출변수로는 자료실이용자수, 대출책수, 상호대차이용건수를 사용하였다. 그 결과 전국 26개의 국립대학도서관 중 효율적인 도서관은 2007년, 2006년, 2005년에 각각 10개, 9개, 9개로 나타났다. 또한 비효율적인 국립대학도서관의 경우 투입물을 줄이고, 산출물을 늘여야 할 정보들을 제시하였다. Data Envelopment Analysis(DEA) model is a linear programing based technique for measuring the relative performance of organizational units where the presence of multiple inputs and outputs makes comparison difficult. DEA model allows each unit to adopt a set of weight that shows it in the most favorable light in comparison to the other units. The purpose of this study was to evaluate the performance of the libraries of national university in terms of relative efficiency, measured by the method of DEA. Twenty six libraries of national universities in Korea were used to analyze. The number of employees, size of library, budget, and number of books were used for input data, and the number of visitors, number of loan books, and number of books for lending and borrowing were used for output data. We found out that number of libraries with 100% relative efficiency among 26 libraries from 2005 to 2007 were only 9, 9 and 10, respectively. Moreover most of the libraries need to increase outputs and decrease inputs in order to improve efficiency.

지열냉난방시스템의 해외진출 방안 연구

조성한 ( Sung-han Jo ),김현제 ( Hyun-jae Kim ) 한국통상정보학회 2019 통상정보연구 Vol.21 No.1

세계 각국은 신재생에너지의 이용을 확대하는 정책을 추진함으로써 기후변화에 대응하고 있다. 신재생에너지의 하나인 지열에너지를 활용하는 지열냉난방시스템의 현황을 조사하고 해외진출 방안을 살펴보았다. 지열냉난방시스템은 2004년 재생에너지 열공급 의무화제도의 일환으로 공공기관에 보급이 시작되었고 국가 신재생에너지 보급 정책과 지자체의 조례 등으로 민간부문의 보급률이 크게 늘어나고 있다. 새로 개발된 지열냉난방시스템이 해외진출을 위해서 우선적으로 사업모델 개발, 재원조달 지원, 제도적 지원, 정보제공 지원, 경쟁국과의 경쟁 및 차별화 전략 등을 고려해야 한다. 지열냉난방시스템이 신재생에너지로서 기후금융을 활용한 개도국 진출 방안을 고려해 볼 수 있다. 지열냉난방시스템이 해외시장에 진출하기 위해서는 국가별 맞춤형 전략이 필요하며, 특히 동남아 지역은 역사적, 문화적인 다양성을 충분히 감안한 진출 전략을 수립하는 것이 바람직하다. In response to climate change, countries around the world are pushing for a policy to expand the use of renewable energy as a measure to reduce carbon dioxide. The present situation of geothermal heating and cooling system utilizing geothermal energy, one of the new renewable energy sources, was investigated and the policy needed for overseas advancement was discussed. As part of the mandatory heat supply system for renewable energy in 2004, the supply rate of district heating and cooling system started to increase greatly due to the government's policy on supply of new and renewable energy and local governments' ordinance. Newly developed geothermal heating and cooling systems should consider business model development, funding support, institutional support, information provision support, competition with competitors and strategies for differentiation in order to advance overseas. Geothermal heating and cooling systems are new and renewable energy sources that can be considered in developing countries using climate finance. In order for the geothermal heating and heating system to advance effectively into Southeast Asia, a national customized strategy is necessary, and the Southeast Asian region has a diverse historical and cultural background, so it is desirable to establish an entry strategy considering these factors.

일반 논문 : 기후변화와 중소기업의 대응전략

조성한 ( Sung Han Jo ),남혜정 ( Hye Jeong Nam ) 한국중소기업학회 2011 中小企業硏究 Vol.33 No.4

20세기에 들어서 온실가스의 증가로 인한 온실효과로 지구온난화가 급속히 이루어지고 있으며 그로 인한 심각한 기후변화가 초래되고 있다. 지구온난화와 기후변화는 국제적 문제로 대두되고 있으며, 해결책으로 기후변화협약을 채택하고 그 실천방안으로 온실가스 저감 노력을 각국에 촉구하고 있다. 이에 우리나라도 2020년까지 배출전망치(BAU) 대비 30%의 저감목표를 설정하였으며, 이러한 온실가스 저감노력은 모든 기업들이 실천해야하는 목표가 되었다. 온실가스 저감노력은 장기적으로는 기업이미지를 제고하고, 나아가 환경을 개선한다는 점에서 기업들이 반드시 해야 할 책임이지만, 이를 수행하기 위해서는 많은 비용이 수반되는 것도 사실이다. 특히 중소기업은 적은 인력과 자원으로 당면한 사회적 책임을 이행하기 위해서는 부담해야 할 비용이 상대적으로 높다. 따라서 온실가스 저감에 대비하여 중소기업에 적합한 준비를 해야 할 필요성이 대두되었다. 본 연구는 우리나라의 기후변화와 온실가스 배출현황에 대하여 살펴보고, 이에 대한 대응전략으로 탄소 발자국 제도(Carbon footprint system)를 검토하고자 한다. 먼저 주요국에서 도입한 탄자 발자국제도에 대한 현황을 파악하고, 이를 바탕으로 중소기업이 기후변화에 대한 대응전략으로 탄자 발자국 제도의 도입을 고찰하였다. 탄소 발자국이란 제품의 생산 및 사람의 일상생활 등 인위적인 일련의 과정에서 발생되는 온실가스의 발생정도를 수치로 계량화하여 제품에 라벨로 부착하거나 표기하는 제도이다. 이는 제품을 구입하는 소비자에게 온실가스로 인한 기후변화의 심각성에 대한 사회적인 인식을 확산시키고, 온실가스 배출량이 적은 제품의 소비를 유도하여 시장 주도적으로 산업계의 온실가스 저감활동을 활성화하는데 그 목적을 두고 있다. 이미 우리나라에서도 중소기업의 탄소성적표지 인증에 대한 다양한 지원정책을 제시하고 있으며, 중소기업이 환경문제에 대하여 적극적으로 참여하는 것에 대한 인센티브를 제공하고 있다. 이러한 논의를 통하여 본 연구는 탄소 발자국 제도에 대한 이해를 높이고, 나아가 중소기업이 온실가스 감축에 동참할 수 있는 방안으로 탄소 발자국 제도가 활용되기를 기대해 본다. 더불어 탄소 발자국의 활용은 제품이나 서비스의 구입 시 소비자에게 환경 친화적인 제품의 선택권을 부여하는 제도이므로, 중소기업의 탄소 발자국 활용이 저탄소 소비문화에 기여하고, 이를 토대로 저탄소제품의 시장경쟁력을 확보함으로써, 온실가스 저감을 통한 지구환경개선에 이바지할 수 있을 것으로 기대된다. In the 20th century, global warming from increased greenhouse gases has resulted in serious climate change. Issues related to global warming and climate change have arisen as international issues and the United Nations Framework Convention on Climate Change (UNFCC) has been adopted as one of the solutions for a practical plan. To cope with the global issues, a reduction of greenhouse gases to mitigate global warming is required by all countries and Korea also set a target to reduce greenhouse gases by 30% by 2020. In addition, Korea is a member of the OECD and ranks as the 10th country in the emission of greenhouse gases. Therefore, a more active participation to reduce greenhouse gases is required in Korea. It is sure that activities for the reduction of greenhouse gases may improve a company`s image in the long term and furthermore, reform the environmental problems. However, it is also sure that these activities will incure a lot of costs. Specifically, small-sized companies which have few human and material resources may bear a lot of expenses. Accordingly, appropriate strategies for small-sized companies to reduce greenhouse gases should be prepared. In this paper, we review the Kyoto Protocol and the history of the reduction of greenhouse gases. To do this, we examine descriptive statistics of greenhouse gases emissions and climate change in Korea, and investigate a carbon footprint system as an appropriate strategy for small-sized companies. First, we identify a carbon footprint system that has been implemented in other countries. Specifically, we document the history and characteristics of carbon footprint system in United Kingdom, United States, Sweden, and Canada. For example, the United Kingdom started a carbon footprint system by Carbon Trust in 2001. According to the survey implemented by the Consumer Association in 2011, 70% of respondents agree about a required carbon label for every item. In addition, they have intention to buy products with a carbon label even though they have to pay more for it. Second, based on the evidence from other countries, we suggest a carbon footprint system as an appropriate strategy for small-sized companies in terms of costs and benefits. Climate change is one of the most serious environmental issues today, and one of the main sources of climate change is carbon dioxide. When it comes to the emission of carbon dioxide, the proportion of carbon dioxide of greenhouse gases was 84.4% in 1990 and 89.5% in 2007, respectively. The more serious problem is that the emission of carbon dioxide has increased over time. Therefore, reducing carbon dioxide is an important issue now. A carbon footprint system is the process in which the carbon dioxide greenhouse gas emissions are targeted with an equivalent amount to be removed. The purpose of the carbon footprint system is to promote a consumer-led purchasing pattern of low carbon goods and to encourage enterprises to develop technologies towards low-carbon goods, thus ultimately contributing to the international efforts to reduce greenhouse gases. The carbon footprint system is not a mandatory certification system, but is a system that companies may participate in on a voluntary basis. The carbon footprint system is becoming prevalent worldwide, especially after the British Carbon Trust Fund launched its experimental scheme in December 2006. Japan also began developing its own carbon footprint system in June 2008. In Korea, the Ministry of Environment, leading retailers such as Shinsegae, E-mart, and Samsung Home Plus made an operating agreement concerning carbon in 2009. In 2011, 434 products in Korea have received a carbon label and more than 500 products are expected to get a carbon label by the end of this year. Moreover, Korea also is recognized as a leading country for carbon labeling in electronic products. There are many advantages when a company adopts a carbon footprint system. If a company is designing and delivering low carbon goods or services, they can improve a company`s image. In addition, by providing quantitative information to consumers with regards to carbon emissions, a company can increase consumer preferences towards less carbon greenhouse emissions along with enhancing the competitiveness of the company. Moreover, the environmental information disclosed regarding the active carbon footprint labeling will help not only customers choosing a more environmentally friendly manufacturer, but also enhance the competitiveness of companies. Therefore, adopting a carbon footprint system in small-sized companies is one of the best strategies to participate in environmental campaigns and to enhance a company`s image. Despite these advantages, participation in the carbon footprint system is relatively low because of high costs and low incentives. According to a report from the Korea Small Business Institute in 2010, understanding about the reduction of greenhouse gases is very low and there is little information about the regulation of greenhouse gases. The report states that small-sized companies said that the best strategy as a response for regulation on the emission of greenhouse gases is to reduce the usage of electric equipment. This implies that most small-sized companies do not have any strategies to implement a plan to reduce greenhouse gasses. So, to deal effectively and efficiently this issue, proper programs for small-sized companies are suggested. Although the Korean government provides many channels and support programs for small-sized companies, more practical incentives like financial aid, tax benefits, or education programs should be provided concurrently. The companies also should put more effort into their business activities. They have to care about effective usage of energy and a reduction of greenhouse gases. In a more aggressive way, they can promote new types of energy such as green sources and photovoltaic power generation to decrease the usage of fossil fuel. To meet the demand of the times, the government introduced a challenging program like a partnership between large and small-sized companies. The program is considered a useful method in terms of offering sophisticated information and technical skill from large companies. Based on the success of this program, the government is expected to adopt the program in new areas and recommend small-sized companies use it. In summary, this study contributes to the related literature in several ways. The reduction of greenhouse gas emissions from carbon footprint labeling contributes to the effort of reduction as a whole, and climate change mitigation. Therefore, the suggestions of this study will be useful for developing mitigation strategies related to climate change. Second, the discussion of environmental issues has progressed for mostly large companies. However, considering the condition of small-sized companies in terms of limited resources, more concerns and efforts should be focused on small-sized companies. The findings of this study show that the carbon footprint system may be an effective strategy that can provide a lot of important implications to regulators and investors. Academics can also apply the discussion in this paper for related research. Also further research on the facts of emissions of diverse fuel types would help create better methods for successfully dealing with the challenges posed by climate change.

CPAP(Continuous Positive Airway Pressure) 치료 프로그램이 취학 전 구순․구개열 아동의 과대비성 개선에 미치는 효과

조성미(Sung-Mi Jo),정옥란(Ok-ran Jeong),한기환(Ki-Hwan Han) 한국음성학회 2007 음성과학 Vol.14 No.4

The purpose of this study was to determine the effectiveness of CPAP (Continuous Positive Airway Pressure) therapy on the treatment of hypernasality in patients with cleft lips and palates. 7 preschool children with severe hypernasality participated in the study. Acoustic measurements of nasality were done by using the NasalView (version 1.31). Results showed that the nasalance values were reduced linearly in both vowels according to the treatment period. The sharp treatment effect was observed at the beginning stage. The nasality values of the vowel /i/ showed a sharp decrease at the Evaluation Phase 1 and 2 and a small increase at the Phase 4 followed by a drop in the end. Further studies would be desirable for various patients with different disorder types.

Hollow-Cathode-Plasma을 이용한 원자층 증착 장치 설계 및 제작

조성은(Sung Eun Jo),한건구(GeonGu Han),이주환(Juhwan Lee),최찬욱(Chanwook Choi),권기범(Gi Beom Kwon),주경재(Kyoungjae Ju),진세영(Se yeong Jin),김현진(Hyeon Jin Kim),안지환(Jihwan An) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11