• 물과 미래
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• 제8권1호
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• pp.15-22
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• 1975

• 물과 미래
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• 제22권4호
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• pp.362-369
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• 1989

• 물과 미래
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• 제7권1호
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• pp.32-37
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• 1974

• 한국항행학회논문지
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• 제24권5호
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• pp.368-373
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• 2020

4차 산업혁명 주요기술을 체계적으로 항공우주력에 적용하기 위해서는 항공우주력 기술 모델이 필요하다. 예전에는 항공우주력 기술 모델링을 위해 항공우주력 기본특성인 고도, 속도, 거리에 기반한 프로펠러 모델이 주로 사용되었다. 그러나 4차 산업혁명 시대에는 수많은 기술들이 융합되기 때문에 새로운 모델이 필요하다. 본 논문에서는 새로운 항공우주력 기술 모델로 제트엔진 모델을 정립하였다. 또한 요구능력 기반이 아닌, 항공우주력 기술 모델을 기반으로 하는 미래 항공우주무기체계 도출과정을 제시한다. 미래 전장환경과 신기술을 적용한 선진국의 개념발전 연구사례를 통해 새로운 개념의 무기체계를 도출할 수 있다.

• KSBB Journal
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• 제27권6호
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• pp.335-340
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• 2012

The microalgae, Microcystis aeruginosa are able to proliferate in a wide range of freshwater ecosystem. M. aeruginosa was cultivated in 25 L and 240 L race-way reactor containing modified medium with added urea 0.2 g/L, increased $Fe^{+2}$, and decreased $Ca^{+2}$ion compared to BG11 medium. Sugar contents of M. aeruginosa grown in BG11 medium, and modified medium were 120 mg/mL and 140 mg/mL respectively. Fermentation was conducted with the extract of M. aeruginosa at $30^{\circ}C$ for 30 h, using Saccharomyces cerevisiae (Sc), Pichia stipitis (Ps), Zymomonas mobilis (Zm), and mixed-culture of these strains (Sc + Ps + Zm). Pichia stipitis (0.7%) was found to be more suitable for producing bioalcohol from M. aeruginosa extract than other strains of Saccharomyces cerevisiae (0.45%) and Zymomonas mobilis (0.61%), while mixed-cultured of these strains showed higest productivity by 1.75%. Biomass of M. aeruginosa contains the potency to be the most renewable resource for bioalcohol fermentation.

• 정보학연구
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• 제12권3호
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• pp.25-48
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• 2009

1. CONTENTS 1) RESEARCH OBJECTIVES The purpose of the study was to propose a future oriented urban space production strategy to offer diverse useful services to citizens to improve international competitiveness of cities in the times of competition that competitive subjects were changed from competition among countries to competition among cities. 2) RESEARCH METHOD In the proposed future-oriented urban space production strategy, the study compared/analyzed main plans related to development of urban space by selecting CBD(Jung-gu) of Busan out of local metropolises in South Korea. 3) RESEARCH FINDINGS In the proposed future-oriented urban space production strategy, the study largely sorted city's function into four scopes function of industrial support, function of social support, function of living support and function of urban infrastructure. 2. RESULTS It is expected that the proposed future oriented urban space production strategy will be utilized as a useful reference model when a lot of local governments, planning a ubiquitous urban space, establish a plan for constructing a ubiquitous urban space.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2011년도 춘계학술대회 논문집
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• pp.1556-1562
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• 2011

Recently many disadvantageous problems have been found during the process of domestic LRT(Light Rail Transit) projects and that can influence negative effects on the development of domestic railway. Since many projects have been progressed while having few original technologies, it is no exaggeration to say that they are being built unreasonable railway which lacks economic feasibility. The on-going LRT projects which are being carried out by the central or local government have a tendency to favor the systems and rolling stocks that have been approved by other countries through years of experience, therefore it can be said that we are having few chances to develop original technologies. In this study, we would like to promote railway development and jump up to the level of advanced railway standards through developing our unique and independent future LRT technology.

• 한국CDE학회논문집
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• 제20권3호
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• pp.221-229
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• 2015

M&S (Modeling & Simulation) based design is widely accepted for the development of the future weapon system with better performance in a cheaper and faster way. Integrated simulation environment (ISE) is needed for the M&S based design. On the ISE, system engineers can not only verify design options but also validate system requirements. In this paper, we propose architectural models of the integrated simulation environment (ISE) which incorporates mission effectiveness M&S (Modeling & Simulation), system performance M&S, the optimization model of integrated performances, digital mockup and virtual prototype. The ISE architectural models may be used to implement the ISE for the development of the future unmanned ground combat vehicle.

• Asian-Australasian Journal of Animal Sciences
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• 제31권7호
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• pp.976-983
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• 2018

Increasing demand in developing countries for animal sources of food including red meat is predicted to double by 2050. In Indonesia, there has always been a gap between supply and demand of beef with national beef production only satisfying about 45% of demand. This paper aims to describe the current features and prospects for beef production systems in Indonesia. The first part of the article reviews and analyses Indonesian beef cattle production systems. The second part addresses issues related to the current systems for beef production that could become important for future development of the beef industry in Indonesia. Recommendations to improve breeding and reproduction, to empower smallholder farmers, to improve the capacity of industry-related institutions to enhance technology transfer, and to develop systems for industry development such as integration of palm oil or plantations with beef cattle production are briefly discussed.

• Nuclear Medicine and Molecular Imaging
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• 제42권2호
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• pp.88-97
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• 2008

In this review paper, basic configurations of gamma detectors in SPECT and PET systems were reviewed together with key performance parameters of the imaging system, such as the detection efficiency, the spatial resolution, the contrast resolution, and the data acquisition time for quick understanding of the system-component relationship and future design of advanced systems. Also key elements of SPECT and PET detectors, such as collimators, gamma detectors were discussed in conjunction with their current and future trend. Especially development trend of new scintillation crystals, innovative silicon-based photo-sensors and futuristic room-temperature semiconductor detectors were reviewed for researchers who are interested in the development of future nuclear medical imaging instruments.