• 기술경영경제학회:학술대회논문집
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• 기술경영경제학회 2005년도 통합학술대회 논문집
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• pp.5-28
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• 2005

This paper estimates the effect of networks on innovative performance at the firm level , using Korean Innovation Survey (KIS) dataset Product innovation, product improvement , and process innovation are used as proxies for innovative activity. The explanatory variables such as firm size, market concentration ratio, lagged profitability, foreign ownership, export ratio, firm's age, formal R&D activity, and industrial R&D intensity are yet other considerations. With two year-long (2000 and 2001) data from 1,124 Korean manufacturing firms, we estimated the logistic regression model. The research finding indicates that the external networks have a strong positive effect on innovative output regardless of type of innovation. However, the network effects by partner (other firms or research institutions) vary across the type of innovation. Especially, we found that the user-supplier linkage plays an important role in product ion innovation, product improvement, and process innovation.

• 기술혁신연구
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• 제13권3호
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• pp.77-100
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• 2005

This paper analyzes the determinants of firm's innovative activity, using Korean Innovation Survey (KIS) dataset. Especially, we focused on the role of external networks by partners(other firms or research institutions) in performing innovative activities. The product innovation, product improvement, and process innovation are used as proxies for innovative activity. The explanatory variables such as market concentration ratio, lagged profitability, foreign ownership, export ratio, firm's age, formal R&D activity, and industrial R&D intensity are also considered. With data from 1,124 firms for the two years (2000-2001), we estimated the logistic regression model. The finding is that the determinants of firm's innovative activities differ by type of innovations. We also found that the innovative behavior of SMEs differs from that of large firms. The result confirms that external networks have a strong positive effect on innovative activity. However, the network effects by partners vary across both firm size and type of innovations.

• KDI Journal of Economic Policy
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• 제25권1호
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• pp.55-98
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• 2003

본 연구는 국내 은행산업의 대형화 및 시장집중도 상승에 따른 은행서비스 시장의 경쟁저하 및 독과점화 우려에 대해 실증적인 분석을 시도한 것이다. 실증분석은 1996년 1월부터 2002년 12월까지 84개월 동안의 은행산업 관련자료를 이용한 Bresnahan-Lau 방법, 즉 은행서비스에 대한 수요함수와 공급함수를 추정하는 방법으로 진행되었다. 추정결과는 전체 표본기간 동안에는 국내 은행산업이 완전경쟁 수준의 가격설정행태(pricing behavior)를 보였으며, 시장집중도 상승을 고려하여 표본기간을 구분할 경우 구분시점에 따라 다소 차이는 있으나, 일반적인 우려와는 달리 시장집중도가 상승한 이후에 적어도 현재까지는 경쟁이 저하되지는 않았다는 것을 시사하고 있다.

• 한국수소및신에너지학회논문집
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• 제34권1호
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• pp.38-46
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• 2023

Carbon neutrality policies have been strengthened to reduce emissions, and the importance of technology road maps has been emphasized. In the global industrial boiler market, carbon neutrality is implemented through fuel diversification of methane-hydrogen mixture gas. However, various problems such as flashback and flame unstability arise. There is a limit to implementing the actual system as it remains in the early stage. Therefore, it is necessary to secure the source technology of methane-hydrogen hybrid combustion system applicable to industrial fields. In this study, control program for methane-hydrogen fuel conversion was developed to expect various parameters. After determining the hydrogen mixing ratio and the input air flow, the fuel conversion control algorithm was constructed to get the parameters that achieve the target oxygen concentration in the exhaust gas. LabVIEW program was used to derive correlations among hydrogen mixing rate, oxygen concentration in exhaust gas, input amount of air and heating value.

• 통상정보연구
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• 제14권4호
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• pp.61-88
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• 2012

한국은 지난해 주력수출품목인 승용차(HS 8703)를 전세계에 409억불 수출하였다. 그러나 인접국인 일본시장에의 수출은 대 전세계 수출규모와 비교한다면 거의 없는 수준이다. 비록 장기간 경기침체 속에 있다하더라도 일본 자동차시장의 신차판매는 연간 500만대 규모의 큰 시장이다. 이러한 관점에서 일본 자동차시장의 경쟁구조를 분석하여, 이에 적합한 한국 자동차기업의 대일 수출전략을 제시하는 것은 의미가 있을 것이다. 본고는 J. S. Bain에 의하여 정립된 상위기업집중율($CR_k$)과 이단경지(伊丹敬之)(Itami Hiroyuki) 등의 일본시장 특성에 관한 선행연구를 이론적 배경으로 하여, 일본 자동차시장의 경쟁구조 변화를 분석하였다. 그 결과, 일본의 자동차시장에서는 시장지배적 위치에 있는 기업이 존재하고는 있으나, 차종별로 들어가면 빅3의 지배력에도 상당한 차이가 발생하고 있을 뿐만 아니라 경쟁구조도 계속 변화하고 있는 것으로 나타났다. 이에 따른, 한국 자동차기업의 대일 수출전략으로 일본 자동차메이커와의 제휴를 통한 유통채널 상호활용 전략, 한국자동차의 브랜드전략, 일본사양(Designed for Japan) 개발을 통한 고급화전략 등을 제시하였다.

• 반도체디스플레이기술학회지
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• 제7권4호
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• pp.45-49
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• 2008

For the commercialization of polymer electrolyte membrane fuel cell (PEMFC), some serious problems such as the decrease of platinum use as catalysts and a larger overpotential of oxygen reduction reaction (ORR) at cathode must be solved. In this study, 20%Pt/C and 20%PtCo/C catalysts for the cathode of PEMFC were synthesized from the chemical reduction method and evaluated using an electrochemical measurement. The ORR activity of synthesized 20%Pt/C and 20%PtCo/C had higher than that of the 20%Pt/C on the market. The synthesized 20%PtCo/C with the cobalt concentration (Pt:Co atomic ratio) from 5 to 20% showed the highest ORR activity.

• 아태비즈니스연구
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• 제9권2호
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• pp.105-121
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• 2018

In 1995, the WTO started to ease the trade barriers. Globalization has accelerated. The opening of the agricultural products market is rapidly gaining momentum with the conclusion of an FTA. The acceleration of this FTA is expected to be a threat to Korea's agriculture, and a new strategy is needed. At the beginning of the nuclear accident, mainly radioactive materials are found in the surface layer of the soil. Over time, the concentration of the plant gradually increases. After 5 years, it becomes noticeable. In March 2016, it will be five years after the nuclear accident. Radioactive contamination is very likely to occur in agricultural products produced in the Fukushima area at this time. In this period, agricultural products produced in the Fukushima region are expected to generate supply disruptions in Japan, and imports to replace them will increase. Therefore, it is necessary to establish a mid- and long-term strategy for exporting to Japan by analyzing the competitiveness of Korean agricultural products. In this study, standardization index was derived by using agricultural price ratio, TSI, export CAC. Based on this, we analyzed the competitiveness of each item in the Japanese market. The analysis shows that garlic is the most competitive product in the Japanese market. Also, strawberry, tomato, and cucumber were found to be competitive. On the other hand, Kiwi, pineapple, soybean, onion, potato, etc. As a result of the analysis, the following strategies were proposed for the export of agricultural products with high competitiveness. First, it is necessary to develop technology to suppress deterioration of export transportation quality. Second, continuous supply of local consumption pattern information is required. Third, it is necessary to expand exports by processing fresh food. Fourth, it suggested the establishment of export base and strengthening of support system.

• Journal of Pharmaceutical Investigation
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• 제35권4호
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• pp.273-278
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• 2005

Nicotine transdermal therapeutic systems $(TTS_S)$ have been regarded as an effective mean to aid smoking cessation. However, most of nicotine $TTS_S$ in the market have some problems such as unpleasant side effects and skin irritation due to the excess amount of the drug permeated and the properties of the additives employed. In order to solve these problems, new nicotine $TTS_S$ were formulated using biocompatible additives. The optimized formula of the drug layer consisted of nicotine, propylene glycol and poloxamer 188 at the ratio of 1.2: 17.0: 2.0. The drug layer had the sickness of $1,250\;{\mu}m$, the pH of 8.12. The skin permeation rate of nicotine from optimized nicotine patch (NP) was $21.5\;{\mu}g/cm^2/h$. Transdermal administration of nicotine patch has been carried out for the determination of pharmacokinetic parameters in rats. Steady-state plasma concentration of nicotine following transdermal application of NP (area of patch = $15\;cm^2$) on the dorsal skin of rats was 143.2 ng/ml and AUC for 24 hrs was 3,022 ng h/ml. In case of $EXODUS^{\circledR}$ and Nicotinell $TTS^{\circledR}$, the steady-state plasma concentration of nicotine and ACU for 24 hrs were 428.9 ng/ml, $9,121\;ng{\cdot}hr/ml$ and 155.3 ng/ml, $3,152\;ng{\cdot}h/ml$, respectively. NP showed the experimental plasma nicotine concentration profile was very similar to the simulated one and had an appropriate skin permeation rate and a steady-state concentration of nicotine, which can show therapeutic blood levels of the drug for 24 hrs without severe side effects.

• 한국정보통신학회논문지
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• 제24권4호
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• pp.553-559
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• 2020

우리나라에서 단일품목으로 가장 큰 수출품인 마른 김은 현재 우리나라의 시장 사정상 대량생산에 중점을 둔 상황이다. 이는 자연스럽게 마른 김의 품질하락으로 이어졌다. 따라서 본 논문에서는 마른 김 생산 시에 기존에 사용자의 경험에 의존하여 김 혼합 비율을 맞추는 방식을 포토센서(IR sensor)를 이용한 보다 효율적으로 조절하는 방식을 제안하였다. 또한 광원을 발생시키는 IR LED Lamp와 농도를 검출하는 포토센서 등을 통하여 얻어진 1차 영상정보들을 바탕으로 실시간으로 김 혼합물 농도를 판단할 수 있는 임베디드 측정 시스템을 개발하였다. 이 방식에서는 정밀한 데이터를 실시간으로 수집 저장함으로써 매년 겨울마다 반복되는 작업 환경에서 이전 연도의 데이터를 확인하여 보다 손쉽게 대처할 수 있게 한다.

• Asian-Australasian Journal of Animal Sciences
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• 제14권11호
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• pp.1585-1591
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• 2001

The present study was conducted to evaluate the effect of early feed restriction on growth, fat accumulation and meat composition in unsexed broiler chickens. Five hundred 7-day old unsexed broiler chickens were distributed into ten treatment groups with 5 pens of 10 broilers each group. One group was fed ad libitum as the control group and other nine groups were fed 25% ad libitum for 3, 6 or 9 days, 50% ad libitum for 3, 6 or 9 days, and 75% ad libitum for 3, 6 or 9 days, respectively. Thereafter, they were fed ad libitum to 56 days of age. The present results showed that broilers showed compensatory growth when they were restrict-refed. Feed conversion ratio was significantly lower in broilers fed 25% ad libitum for 9 days (p<0.05). Triglyceride concentration of serum was significantly lower in restricted unsexed broilers (p <0.01), whereas cholesterol concentration was not significantly different. Abdominal fat was significantly lower in broilers fed 25% ad libitum for 9 days, 50% ad libitum for 3 days and 75% ad libitum for 6 or 9 days (p<0.05). Moisture and protein contents of meats were not significantly affected. Ash content of meat was significantly higher in restricted broilers. Fat content of meat was lower in broilers fed 25% ad libitum for 9 days, 75% ad libitum for 3 to 9 days. In conclusion, broilers showed compensatory growth when they were restrict-refed at an early age. In order to achieve the success of early feed restriction (namely reduce fat accumulation and improve feed conversion ratio with comparable body weight at market age), unsexed broilers should be fed at level of 25 ad libi=tum for 9 days starting at 7 days of age.