• 식물조직배양학회지
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• 제27권4호
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• pp.345-352
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• 2000

Food production is a major role of agriculture. It has been projected that the world population continues to increase by the middle of the 21st century, and the population growth results in raising a serious problem of food shortage. Thus we have to increase food as possible. A considerable amount of crops have been abandoned due to short-life after postharvest. Ethylene is a factor responsible for the postharvest loss in crops, especially horticultural crops. If we can reduce ethylene production or sensitivity by genetic engineering, we can develop, so called,“long-life crop”conferring long postharvest lives. During last two decades, intensive research for molecular dissection of ethylene biosynthesis has been carried out, and the researchers have succeeded in engineering ethylene productivity in some crops. On the other hand, after the successful isolation of Arabidopsis ethylene receptor gene ETR1, the homolog genes have been isolated in various plant species. Currently the characterization of these genes and alteration of ethylene sensitivity using the genes are in progress. This review summarizes current progress in the analysis of these genes, and discusses genetic engineering of ethylene sensitivity using these genes.

• Current Photovoltaic Research
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• 제2권4호
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• pp.157-167
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• 2014

Colloidal quantum dot (CQD) solar cells have attracted great attention due to their cost-effectiveness and solution-processability, as well as their size-dependent optical and electrical properties. The power conversion efficiency of CQD solar cells has rapidly increased up to ~8.6%, which corresponds to the 3 - 4 fold improvement during the last 3 - 4 years. Up to now, there have been many pioneering results in CQD solar cells. Here, we review the recent progress of CQD solar cells including CQD synthesis strategy and device structure engineering.

• 한국가금학회지
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• 제28권2호
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• pp.155-163
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• 2001

Gene and cell transfer technique will serve as a powerful tool for the genetic improvement of the poultry and to yield useful products. For avian transgenesis, Japanese quail may serve as an excellent animal model because of its small body size and fast growth rate. Recent progress was described on the manipulation of quail embryos such as the introduction of foreign genes and cells, and the subsequent culturing of the manipulated embryos yielding hatchlings. Intraspecific donor-derived offspring have been available in quail, however, further investigation will be required to obtain interspecific offspring with the aim of rescuing endangered species. Trans genesis will also be useful for improving the profitability and quality of poultry stocks and for developing stocks with novel uses. Considerable progress should soon be made toward the production of transgenic poultry. The key feature of the procedure described here is that embryos are initially taken out from the shell for ease of manipulation and then placed back in culture in addition to various operations midway during culture.

• Journal of Plant Biotechnology
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• 제36권4호
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• pp.336-343
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• 2009

Tall fescue is an open-pollinated, perennial, cool season grass species widely used for forage and turf. Tremendous progress has been made in genetic transformation of tall fescue in the past decade. Methods for generating transgenic tall fescue plants have been developed based on biolistic transformation and Agrobacterium-mediated transformation. Potentially useful agronomic genes have been tested to environmental stress tolerance, herbicide tolerance and improve forage quality in tall fescue plants. We review progress in biotechnological improvement of tall fescue and discuss future molecular breeding of this species.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2008년도 춘계학술대회 논문집
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• pp.1333-1339
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• 2008

Typically, we regularly have carried out a technical review to know a progress status and outcomes of a project to the appropriate technical plans. But during the technical review executed at a planned point of time, lots of problems; reports of an ambiguous progress status and outcomes, a discordance between opinions, and an hour's delay, have been occurred. To solve those problems an early stage, an informal reviews are executed before the formal technical review. One of the informal review is the Peer-Review. This paper is a matter of the effective and efficient Reer-Review process utilized in performing the national research and development project. Additionally, it was presented a general misunderstanding and improvement plan about the Peer-Review.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 춘계 학술논문 발표대회
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• pp.245-246
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• 2013

The construction of green building has distinct charicteristics by work classification by applying green technologies. Thus if the new technologies are applied to construction, unskiiled worker can experience construction time delay, reconstruction occurrence and quality decrease because of mistakes during the construction and work progress. For this background, we establish the work progress manual to secure quality and performance during the construction phase of green building and provide method to be used in the construction sight operation.

• 한국세라믹학회지
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• 제56권1호
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• pp.24-36
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• 2019

Recently, considerable progress and many breakthroughs have been achieved in the growth of two-dimensional materials, especially transition metal dichalcogenides (TMDCs), which attract significant attention owing to their unique properties originating from their atomically thin layered structure. Chemical vapor deposition (CVD) has shown great promise to fabricate large-scale and high-quality TMDC films with exceptional electronic and optical properties. However, the scalable growth of high-quality TMDCs by CVD is yet to meet industrial criteria. Therefore, growth mechanisms should be unveiled for a deeper understanding and further improvement of growth methods are required. This review summarizes the recent progress in the growth methods of TMDCs through CVD and other modified approaches to gain insights into the growth of large-scale and high-quality TMDCs.

• 한국건설관리학회:학술대회논문집
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• 한국건설관리학회 2003년도 학술대회지
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• pp.307-310
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• 2003

건설프로젝트는 불확실한 요소들로 인해 많은 위험을 가지고 있다. 그래서 프로젝트의 다양한 측면에서 현장 수행사항을 계속해서 측정관리하는 것이 매우 중요하다. 그러나 건설공사는 주로 결과에 초점을 맞춰 수행되어지며 게다가 비용과 일정은 통합 관리되었을 때의 효율성이 뛰어남에도 서로 분리되어 관리되고 있다. 최근 EVMS(Earned Value Management System)에 대한 관심 때문에 많은 연구들이 발표되고 있지만 실제 건설현장에 적용할 수 있는 예를 찾기가 쉽지 않다. 이 논문의 목적은 비용과 일정의 통합관리에 의한 EV개념을 기반으로 한 건설공사 진도울 산정의 개선방안을 도출함에 있다.

• 한국건설관리학회논문집
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• 제13권1호
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• pp.148-159
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• 2012

최근 건설경기 위축으로 건설 계약자들의 치열한 수주 경쟁 및 수익성 저조에 따른 경영악화 현상이 심각한 수준에 이르고 있다. 이러한 상황에서 많은 건설관계자들은 "국가계약법"에 의해 공사비를 보호받을 수 있는 공공건설사업에 대한 의존도가 높아지고 있다. 그러나 이러한 법률적 규정이 존재함에도 불구하고 기성금 신청 및 지급과 관련된 문제가 지속적으로 발생하고 있으며, 이를 해결하기 위해 제시되는 대부분의 방안이 계약관계자간의 상호 영향도를 충분히 반영하지 못하고 있어 이를 정책적으로 반영하는데 어려움이 있다. 이에 본 연구에서는 공공건설사업 시공단계의 기성금 신청 및 지급에 대한 현행 규정제도를 바탕으로 신청 지연 및 지급지연에 따른 계약 관계자들의 상대적 영향도를 정량적으로 파악하고자 한다. 이를 위해 상호 관계성에 관한 지식을 바탕으로 통합적 시각에 따른 현상 분석이 가능한 시스템다이내믹스 모델을 통한 연구를 바탕으로 기성금 신청 및 지급 문제를 해결하기 위한 방안을 제시하였다.

• 한국항만학회지
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• 제13권1호
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• pp.51-64
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• 1999

This study is on the focus of the cost-effective and time-effective in the BCTOC which commenced the On Dock Termainal System in 1998 for the first time in Korea. On this process of study two categories should be considered : (1) Improvement on Business Process (2) Improvement on Information Technology. With these two accesses a new future-oriented and prospective model could be put on our hand as follows. (1) Improvement on Business Process \circled1Consistency of container In-Out Operation \circled2Simplicity of Rate appraisal \circled3Unified operation on Billing and Request (2) Improvement on Information Technology \circled1Scale up the Information Application \circled2Constructing an one-spot simultaneous Information Holding System \circled3Combination of Internet and Integrated Database System.