• 한국국방경영분석학회지
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• 제34권1호
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• pp.47-59
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• 2008

본 연구는 방위산업체의 연구개발 투자활동이 경영성과에 대하여 어떠한 영향을 미치는지에 대하여 실증적 분석을 수행하였다. 연구의 주요 분석 결과에 대해서 살펴보면 다음과 같다. 첫째, 방위산업체의 성장성 증대를 위해서는 연구인력의 교육지원 기회 확대, 관련부서간의 긴밀한 협력이 필요한 것으로 나타났다. 둘째, 방위산업체의 생산성 증대를 위해서는 연구개발 투자비를 증대해야 하며, 셋째, 방위산업체의 수익성 증대를 위해서는 관련부서 간 협력강화가 정(+)의 영향을 미치는 것으로 나타났다.

• Kyungpook Mathematical Journal
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• 제49권2호
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• pp.195-202
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• 2009

This paper deals with very weak solutions of the A-harmonic equation $divA(x,{\nabla}u)$ = 0 (*) with the operator $A:{\Omega}{\times}R^n{\rightarrow}R^n$ satisfies some coercivity and controllable growth conditions with Muckenhoupt weight. By using the Hodge decomposition with weight, a regularity property is proved: There exists an integrable exponent $r_1=r_1({\lambda},n,p)$ < p, such that every very weak solution $u{\in}W_{loc}^{1,r}({\Omega},{\omega})$ with $r_1$ < r < p belongs to $W_{loc}^{1,p}({\Omega},{\omega})$. That is, u is a weak solution to (*) in the usual sense.

• 기술혁신연구
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• 제2권1호
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• pp.242-255
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• 1994

Indigenous technological development and import of foreign technologies are two major sources of industrial innovation in Korea. This paper mainly deals with the analysis of the relationship between the two sources, employing the Tobit method. The estimation of the effects of those two sources on the firms' sales growth is also performed, including other exogenous variables such as fixed capital formation and the amount of exports, etc. in the model. Technological import is shown to be complimentary rather than substitute for or competitive with R&D in the Korean industries during 1990. This is understandable because R&D may be conducted to absorb and adapt the advanced imported technologies as well as to further more innovative technological development. Fixed capital formation is positively correlated with technology import, but negatively correlated with R&D. Technology importation seems to have contributed much more than R&D to the sales increase in the Korean industries.

• Journal of Welding and Joining
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• 제18권2호
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• pp.239-239
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• 2000

Automobile manufacturers have employed resistance spot welding(RSW) to join steel sheets for structural rigidity o automobile body. Driven by the need to reduce weight and fuel consumption, car companies have been evaluating aluminum intensive vehicles(AIVs) as a way to reduce vehicle weight without downsizing. During the transition from all steel-construction vehicle body to aluminum intensive body, joining aluminum to steel sheets emerges as a serious contender in automobile body. This paper deals with application of transition material to RSW aluminum to steel. Placing transition material insert between the aluminum/steel interface was found very effective to overcome incompatibility between aluminum and steel. Use of transition insert allows for two separate weld muggets to be formed in their respective aluminum/ aluminum and steel/ steel interfaces. This RSW process was monitored with the aid of dynamic resistance sampling. Typical patterns in sampled dynamic resistance curves indicated formation of sound nugget. (Received February 28, 2000)

• Journal of Welding and Joining
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• 제18권2호
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• pp.112-118
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• 2000

Automobile manufacturers have employed resistance spot welding(RSW) to join steel sheets for structural rigidity of automobile body. Driven by the need to reduce weight and fuel consumption, car companies have been evaluating aluminum intensive vehicles(AIVs) as a way to reduce vehicle weight without downsizing. During the transition from all steel-construction vehicle body to aluminum intensive body, joining aluminum to steel sheets emerges as a serious contender in automobile body. This paper deals with application of transition material to RSW aluminum to steel. Placing transition material insert between the aluminum/steel interface was found very effective to overcome incompatibility between aluminum and steel. Use of transition insert allows for two separate weld nuggets to be formal in their respective aluminum/aluminum and steel/steel interfaces. This RSW process was monitored with the aid of dynamic resistance sampling. Typical patterns in sampled dynamic resistance curves indicated formation of sound nugget.

• 한국표면공학회지
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• 제47권6호
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• pp.287-292
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• 2014

The present study deals with a numerical analysis on the island growth of heteroepitaxial thin-films through local surface diffusivity enhancement. A non-linear governing equation for the surface waviness evolution in lattice-mismatched material systems is developed for the case of spatially-varying surface diffusivity. Results show that a flat film that is stable under constant diffusivity conditions evolves to form nanostructures upon externally-induced spatial diffusivity modulation. The periodicity of waviness can be controlled by changing the modulation parameters, which allows for generation of pattern arrays. The present study therefore points towards a post-deposition treatment technique that achieves controllability and order in the structure formation process for applications in nanoelectronics and thin-film devices.

• Journal of Genetic Medicine
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• 제18권1호
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• pp.24-30
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• 2021

Epigenetics deals with modifications in gene expression, without altering the underlying DNA sequence. Genomic imprinting is a complex epigenetic phenomenon that refers to parent-of-origin-specific gene expression. Beckwith-Wiedemann syndrome (BWS) and Silver-Russell syndrome (SRS) are congenital imprinting disorders with mirror opposite alterations at the genomic loci in 11p15.5 and opposite phenotypes. BWS and SRS are important imprinting disorders with the increase of knowledge of genetic and epigenetic mechanisms. Altered expression of the imprinted genes in 11p15.5, especially IGF2 and CDKN1C, affects fetal and postnatal growth. A wide range of imprinting defects at multiple loci, instead of a restricted locus, has been shown in some patients with either BWS or SRS. The development of new high-throughput assays will make it possible to allow accurate diagnosis, personalized therapy, and informative genetic counseling.

• 전자통신동향분석
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• 제38권3호
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• pp.29-37
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• 2023

With the increasing demand for seafood and technological advancement in aquaculture, the industry has continuously grown. On the other hand, digital twins have been actively applied to various industries. Aquaculture deals with live aquatic animals that are sensitive to growth environment management. Hence, applying a digital twin to smart aquaculture may lead to a substantial economic benefit because it enables the optimization of different variables. We analyze the status of digital twin development in agriculture. The services of the aquafarm digital twin are divided into 1) data management, 2) optimization, and 3) intelligence. Standardization related to the aquafarm digital twin is also discussed. Based on the analyses, the development stage of aquafarm digital twin is defined, and directions of technology development are suggested.

• 한국프랜차이즈경영연구
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• 제2권1호
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• pp.61-73
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• 2011

Supermarket Franchising, as a relatively new mode of retail business, is often regarded as one of the two hallmarks of the "Modern Logistics Revolution". After more than ten years of development, franchise supermarkets have been a rising force in retail business in China. As a product of a highly-developed commercial economy, franchise supermarkets mainly deals in foodstuffs and other daily necessities, featuring low cost, high turnover rate, low prices and diversified inventory. Propelled by the conveniences that come with open shelves and self-service shopping, franchise supermarkets have been growing very rapidly and the rise of many franchise supermarket brands bears testimony to its growth potential and profitability. Meanwhile, in the backdrop of this boom, some franchise supermarkets are going bankrupt. This paper analyzes the current status of franchise supermarkets and some factors bearing on their core competencies, so as to close the competitiveness gap with international retail giants.

• 자원ㆍ환경경제연구
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• 제20권2호
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• pp.167-198
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• 2011

최근 우리나라는 2020년 Business-As-Usual(BAU) 대비 30%를 감축하는 탄소배출 감축안을 목표로 설정하였다. 탄소배출 감축목표 달성의 한 방편으로 탄소배출권 거래제가 논의되고 있는 상황이지만, 탄소배출권 거래제를 실시하기 위해서는 가장 먼저 초기 탄소배출권의 배분문제가 해결되어야 한다. 본 연구에서는 탄소배출권 초기배분방식 결정이 우리 경제에 어떠한 영향을 미칠 수 있는가를 중심으로 살펴보았다. 이를 위해 협조적 게임이론인 bankruptcy problem에서의 배분방법을 적용해 배출권을 각 산업별로 배분하였다. 산업별 이산화탄소 배출량은 에너지 통계와 산업연관표를 결합한 하이브리드 산업연관표를 이용해 추계하였다. 세 가지 분배방법에 따른 경제적 파급효과 분석에는 녹색성장회계(green growth accounting) 방식이 적용되었다. 분석결과, 2005년~2007년 기간 동안 우리나라의 연평균 경제성장률은 약 4.36%로 추계되는데, Proportional rule에 의한 배분에 의하면 4.03%, Constrained Equal Awards rule에 의한 배분에서는 4.23%, 마지막으로 Constrained Equal Losses rule에 의한 배분으로는 3.67%로 추산되었다. 따라서 경제성장률 측면에서 보면 Constrained Equal Awards rule에 의한 초기 탄소배출권 배분이 가장 바람직한 것으로 분석된다. 이처럼 초기 배출권의 산업별 배분방식이 어떻게 결정되느냐에 따라 경제에 미치는 파급효과가 매우 상이하게 나타나기 때문에 탄소배출권 도입 및 시행을 위해서는 산업 수준의 연구결과를 반영해야 하며, 각 산업의 특성을 고려해야 할 것으로 보인다.