Plastic 광섬유용 GRIN ROD의 제조 및 그 광학특성에 관한 연구

한동근,임승순,김정엽,Han, Dong-Geun,Im, Seung-Sun,Kim, Jeong-Yeop 한국섬유공학회 1985 한국섬유공학회지 Vol.22 No.5

The photocopolymerization of methyl methacrylate(MMA) with vinyl benzoate(VB), using benzoyl peroxide(BPO) as an initiator, was carried out with UV irradiation to obtain a transparent GRIN rod. The resulting GRIN rod has a parabolic gradient of refractive index in the region near the center axis(radius Rc), and index-distribution constant A and the normalized radius Rc were measured by the reduction rate of an image and the view field of the rod lens. An increase in monomer feed ratio, MMA/VB(wt/wt) ranging from 2.5 to 5.0 results in the increase of A but the decrease of Rc. The value of A grew very high at BPO=1.0wt% and MMA/VB=4.0, and the value of Rc monotonically decreased with the BPO concentration. Elevation of the polymerization temperature caused the decrease in both A and Rc. The index distribution from the center to the periphery showed a similar shape, regardless to the sample compositions. The GRIN rod shows convex lens characteristics which are necessary properties in use of imaging and light-focusing devices.

요추 추간판탈출증을 동반한 당뇨병 환자에 대한 한방 치험 1례

한동근,최아련,정유진,강아현,서혜진,성재연,이형철,엄국현,송우섭,Han, Dong-geun,Choi, A-ryun,Jung, You-jin,Kang, Ah-hyun,Seo, Hye-jin,Sung, Jae-yeon,Lee, Hyung-chul,Eom, Gook-hyun,Song, Woo-sub 대한한방내과학회 2017 大韓韓方內科學會誌 Vol.38 No.5

Objective: The aim of this study was to evaluate the effects of traditional Korean medicine as a treatment for diabetes mellitus with herniated intervertebral lumbar discs. Method: The patients were treated with the herbal medicine Jungso-tang to reduce serum glucose (FBS/PP2hrs) and HbA1c to improve diabetes mellitus in parallel with lumbar herniated intervertebral disc treatment. Results: The treatment with Jungso-tang decreased the serum glucose (FBS/PP2hrs) and HbA1c levels. Conclusion: Korean medicine may be an effective treatment for diabetes mellitus with lumbar herniated intervertebral disc.

안면신경마비 환자에 대한 한방 치험 1례

한동근,강아현,서혜진,성재연,오주현,이유라,이형철,엄국현,송우섭,Han, Dong-geun,Kang, Ah-hyun,Seo, Hye-jin,Sung, Jae-yeon,Oh, Ju-hyun,Lee, Yu-ra,Lee, Hyung-chul,Um, Guk-hyun,Song, Woo-sub 대한한방내과학회 2018 大韓韓方內科學會誌 Vol.39 No.2

Objective: This study is designed to evaluate the effects of Korean medicine treatment for facial nerve palsy. Method: The patient was administered Korean medicine treatment, including acupuncture, pharmacopuncture, and herbal medicine. We used the House-Brackmann Grading System and Yanagihara's Unweighted Grading System to assess the symptoms of facial nerve palsy. Results: The patient's House-Brackmann grade was reduced from grade IV to grade II, and Yanagihara's grade was increased from 19 to 32. The patient's symptoms, which were facial pain, facial asymmetry, reduced wrinkling forehead, incomplete closing eye, epiphora, and tinnitus, improved during the hospitalization. Conclusion: This study shows that Korean medicine treatment may be an effective treatment for facial nerve palsy.

메타크릴산 메틸과 벤조산 비닐의 광공중합

한동근(Dong Geun Han),임승순(Seung Soon Im),김정엽(Chung Yup Kim) 한국고분자학회 1984 폴리머 Vol.8 No.5

환율불확실성과 환율정책의 국제간 협조

한동근 ( Dong Geun Han ) 한국경제학회 1995 經濟學硏究 Vol.43 No.3

토지거래량과 토지가격의 관계에 관한 실증분석

한동근(Dong Geun Han) 한국경제통상학회 2011 경제연구 Vol.29 No.2

본 연구가 관심을 가진 문제는 다음과 같다. 토지거래량과 가격은 어떤 상관관계를 가지는가? 그것은 인과관계인가? 과연 거래량은 미래 가격변화의 선행지표(leading indicator)가 될 수 있는 것인가? 부동산 시장에서 거래량의 증가는 가격의 변동성(volatility)을 완화시키는가, 아니면 더 불안하게 하는가? 전국, 서울, 부산, 대구, 인천, 광주, 대전의 분기자료와 월별자료를 사용한 분석결과는 다음과 같다. 첫째, 거래량과 가격간에는 (+)상관관계가 발견된다. 둘째, 전국, 서울, 인천과 같이 규모가 큰 시장에서는 두 변수간에 Granger인과관계가 존재한다. Granger인과관계는 월단위보다 분기 단위의 기간에서 더 뚜렷하게 나타난다. 거래량과 가격간에는 양방향 인과관계와 가격→거래량의 일방향 인과관계가 함께 발견되었다. 셋째, 패널자료 분석 결과는 거래량이 미래의 가격변화에 대한 선행지표가 될 수 있음을 보여주었다. 특히 분기자료에서 그 효과가 크게 나타났다. 넷째, 거래량은 지가 변동성에 (-)영향을 미친다. 이는 거래량이 증가함에 따라 토지시장이 하향 안정된다는 것을 의미한다. 본 연구의 실증분석 결과는 기존의 관련이론의 틀 속에서 해석이 가능하다. 토지시장에서의 가격-거래량 간의 (+)상관관계는 행태경제학에서 제시하는 손실기피(loss-aversion)가설과 배치되지 않는다. 거래량이 가격변동성과 (-)관계를 가지고 있다는 점은 거래량 증가가 토지시장에서의 정보순환을 확대하고 비대칭적 정보구조를 완화시킨다는 해석이 가능하다. This study addresses the following questions; how does the volume of transaction relate with the prices in land market ? Can the volume of transaction be a leading indicator predicting future price changes? Does the increase in transaction make the land market more stable or more unstable? We use both monthly and quarterly data for the nation as a whole, and region: Seoul, Busan, Taegu, Incheon, Kwangju, and Daejeon. The results are as follows: First, there is a positive relationship between the volume of transaction and the prices. Second, in large markets such as nation as a whole, Seoul, and Incheon, there exist Granger-causality relationships between the two variables. And the Granger-causality is stronger in quarterly data than in monthly. The direction of causality is mostly from price to the volume of transaction. Third, in quarterly data, transaction volume may serve as a leading indicator for predicting future changes in price. Fourth, as the larger volume of transaction is generated, the less the volatility of price movements becomes. This implies that the increase in transaction volume contributes to stabilizing the land market. The empirical results can be interpreted in the frame of existing theories. The positive correlation between the volume and price conforms to the loss-aversion hypothesis developed in the behavioral economics field. And the negative relationship between transaction and price volatility implies that increase in transaction promotes circulation of information and so mitigates asymmetric information among market participants in the land market.

Venture Business, Subsidy Policy and Income Distribution

한동근(Dong-Geun Han) 한국경제통상학회 2003 경제연구 Vol.21 No.2

이 연구는 최근 활발하게 벌어지고 있는 정부의 벤처기업지원 정책이 계층간 소득분배에 미치는 영향을 분석한다. 위험회피적 기업가를 가정한 본 연구의 모형은 벤처기업지원정책이 전체적인 국민소득을 높이는 효과는 있으나 소득분배는 왜곡할 가능성이 매우 높다는 것을 보여준다. 정부의 벤처지원정책은 벤처기업의 기대수익을 인위적으로 높여 위험회피자들을 전통산업 부문에서 벤처부문으로 끌어들인다. 그러나 벤처기업의 특성상, 진입한 다수의 기업 들이 실패하는데, 그 결과 실패자들은 저소득 계층으로 전락한다. 반면에 성공한 소수의 기업 은 국민소득을 높이는 작용을 한마. 로렌즈 (Lorenz) 곡선으로 파악한 개인간 소득분배도 중 간계층이 앓아짐으로 인해 악화된다. 이러한 결과는 정부의 벤처지원금 (subsidy) 를 사후적으로 제거한 분석, 즉 ex post 분석 결과에서도 유효한 것으로 나다났다. This paper shows that the venture-investment promotion policy is very likely to worsen the income distribution, although it increases the national income as a whole. The government subsidy to the venture business makes the expected profits from the venture business look higher, which attracts risk-averse agents to the venture out of the traditional non-venture sector. Although most of the new entrants into the venture sector fail due to the very slim probability of success, the amount of income generated by those who are successful more than countervails the income losses of those who fail. This result is true even for the case where the subsidy is taken back ex post from the venture sector. The paper also shows that income distribution measured by the Lorenz curve and the interpersonal variance of income is aggravated by the policy. The middle income class who are in non-venture sector shrinks, while more agents get attracted to the venture sector. And only a small fraction of those joining the venture sector enjoys the high returns, with rest of them earning much less income than those in the non-venture sector.

도시성장 전략으로서의 지식근로자 유치에 관한 연구: 대구광역시를 중심으로

한동근 ( Dong Geun Han ),남병탁 ( Pyeong Tak Nahm ),손수석 ( Soo Suk Sohn ) 한국경제통상학회 2009 경제연구 Vol.27 No.4

On the Impacts of Regional Trading Arrangements on FDI

Dong-Geun Han(한동근),Taek-Dong Yeo(여택동),Young-Man Yoon(윤영만),Shiyong Yoo(유시영) 한국무역학회 2004 한국무역학회 세미나 및 토론회 Vol.2004 No.8

The paper examines the impacts of the Northeast Regional Trading Arrangements (RTAs) on inward FDI to Korea. We first study the theoretical background of the relations between RTAs and FDI. Secondly, we analyze the major determinants of the inward FDI to Korea. Finally, a prediction about how the China-Japan-Korea FTA (hereinafter (CJK FTA) will affect the inward FDI to Korea is provided. Prior literature shows that there are three motives for FDI; horizontal integration, vertical integration, and advantage for product varieties. Depending upon which characterthe inward FDI to Korea has, the impact of the China-Japan-Korea FTA on the inward FDI will differ. With the theoretical background, we implemented an empirical study. To characterize the inward FDI to Korea, we constructed a fixed effect regression model where inward FDI was regressed on wage and interest differentials between home and source countries, exchange rates, GDP, trade volume, and the number of labor dispute. Two data sets were used: one consisting of the inward FDI by source country (1980-2003), and the other consisting of the inward FDI by sector and source country (1998-2003). Our empirical results show that the inward FDI to Korea is of both horizontal and vertical character. We argue that the China-Japan-Korea FTA is very likely to encourage FDI inflows to Korea. It is empirically found that the trade volume variable has a positive impact on the inward FDI in all industries, implying that trade and FDI are complements in the Korean industries. Empirical results also show consistent negative signs on real wage differential variable across industries. It is expected that the elasticity of the inward FDI with respect to the real wage differential is going to be much higher once the CJK FTA is formed. It is also expected that the negative effect of labor dispute on the inward FDI will aggravate when the FTA is created. A channel through which FTA may promote the FDI to Korea is growing domestic market size. FTA in general prompts economic growth through enlarged international trade. Therefore, growing consumers' purchasing power under the FTA could attract more FDI into Korea. Whether FTA will discourage or encourage the inward FDI depends on the relative magnitude of positive and negative impacts the FTA will bring. But our temporary verdict is that the CJK FTA is more likely to encourage the inward FDI in general as the Korean labor market is becoming more flexible.

1970년대 농촌 새마을운동에서의 마을금고의 역할: 사례 중심으로

한동근(Dong Geun Han) 한국경제통상학회 2019 경제연구 Vol.37 No.3

1970년대 새마을운동 시기와 농촌 마을금고의 팽창시기는 일치하고 있다. 이는 마을금고 운동이 새마을운동과 상호 보완관계에 있었으며 시너지 효과를 창출했기 때문이다. 이 논문의 목적은 새마을운동과 마을금고 운동과의 관계를 탐구함으로써 마을금고가 농촌의 금융소외 문제를 완화했을 뿐아니라, 새마을운동 프로젝트에 자금을 공급하고, 주민들의 근검절약 정신을 확립하는데 기여함으로써 ‘할 수 있다, 잘 살아보자’는 새마을운동 정신을 키우는 기재의 역할을 했다는 것을 사례를 통해 보여준다. 1970년대 새마을운동과 마을금고운동에 대한 자료는 30-40년 이전에 생산된 것에 나타나 있고 통계적 분석이 어려운 사례위주로 되어 있어 계량분석 등이 어렵다는 한계가 있다. 한국의 마을금고운동은 많은 개도국에서 추진되고 있고 외부자원에 의존하는 마이크로크레딧(microcredit)과는 차별화된다. 마을금고 운동은 주민들이 스스로 노력하고 협력하며 사회적 자본을 축적하는 기재를 가지고 있다. The village credit cooperative program (VCC) was rapidly expanded with the progress of the Saemaeul Undong (SMU). It would be difficult to claim that the timing of SMU and rapid growth of the VCCs was a coincidence. The VCC movement could gain momentum because it played a role in supplying capital with SMU, and it boosted participation in SMU, and inculcated the spirit of frugality through SMU. In this regard, SMU and VCC movement were in a complementary relationship and boosted their impacts through a synergistic effect. This paper shows how the VCC movement and SMU specifically linked with each other and illustrates the synergistic effects between VCC and SMU. Unlike microcredit programs which rely on external funding sources, the VCC has a mechanism that can accumulate local social capital through residents endeavoring in mutual cooperation for themselves.