• 수산해양교육연구
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• 제28권3호
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• pp.611-618
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• 2016

A $3{\times}2$ factorial experiment was conducted to investigate effects of water temperature and feeding rate on growth and body composition of olive flounder. Triplicate groups of fish (initial body weight of 118 g) fed a extruded pellet (55% protein and 4708 cal/g) to satiation and at restricted feeding rates of 0.25 and 0.4% body weight per day (BW/d) at the different water temperatures (13 and $18^{\circ}C$) for 9 weeks. Weight gain increased significantly with increase in feeding rates at each temperature. Weight gain of fish fed to satiation was significantly higher at 18 than $13^{\circ}C$, whereas, that of fish fed at 0.25 and 0.4% BW/d were significantly or slightly lower at 18 than $13^{\circ}C$. Feed efficiency and protein efficiency ratio of fish fed to satiation were not significantly different between 13 and $18^{\circ}C$, but those of fish fed at 0.25 and 0.4% BW/d were significantly higher at 13 than $18^{\circ}C$. The major finding of this study is that satiation feeding is efficient for optimal growth and feed efficiency of grower oliver flounder (116-164 g) in suboptimal water temperatures. The maintenance feeding ration which is zero growth performance, were 0.30 and 0.41% BW/day at 13 and $18^{\circ}C$, respectively. In the restricted feeding regime, compromised growth of fish were worsen in higher water temperature ($18^{\circ}C$ vs. $13^{\circ}C$). It might be related to high metabolic rate of fish that spend more energy for maintenance metabolism. Based on these results, we suggest that a satiation feeding regime is recommended for a productive growth of grower olive flounder in the suboptimal temperature.

• 한국추진공학회지
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• 제7권3호
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• pp.1-7
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• 2003

본 연구에서는 열적 삭마에 의한 노즐목 면적 증가량을 알아내기 위해 KSR-III로켓의 주엔진인 KL-3 엔진의 노즐목의 형상을 측정하고자 시도하였으며, 기존에 사용하던 3차원 변위 측정기를 이용한 방식의 접근이 곤란함에 따라 영상처리 기법을 도입한 측정 방식을 고안하여 사용하였다. 영상 기반 노즐목 형상 측정 장치는 만족스런 결과를 보였다. 시험결과 분석을 통해서는 삭마의 형상은 분무 형상에 의해 결정된다는 것과, 삭마의 진행이 3개의 구간으로 나누어 설명할 수 있음을 밝혔는데, 노즐목이 원형을 그대로 유지하며 삭마진행이 미미한 구간, 원형에서 벗어나 요철형상이 발달하면서 삭마진행이 가속되는 구간, 요철형상이 이미 정착되어서 요철의 깊이만 증가하되 삭마량은 미미한 구간이다. 또한 60초 연소 후 노즐목 면적 증가율은 +5.82% 정도로 만족할 만한 수준으로 판단한다.

• 한국항공우주법학회:학술대회논문집
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• 한국항공우주법학회 2008년도 제40회 국제학술발표대회
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• pp.185-215
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• 2008

The exploitation of the natural resources of the Moon and other celestial bodies represents one of the most exiting future developments in the field of space law as well as a unique occasion for the economic and social growth of mankind as a whole. The large number of benefits that are expected to be generated from the exploitation of these resources, indeed, not only will contribute to the betterment of conditions of people on Earth but also will allow mankind to face and likely solve one of the biggest problems currently affecting our planet, namely the exhaustion of the stocks of raw materials and other source of energy, such as fossil fuels. The exploitation of the natural resources of the Moon and other celestial bodies, however, has been prevented so far by the absence of dedicated space law rules allowing its orderly and peaceful development and clarifying the rights and duties of the parties involved in it. Due to the uncertainty generated by the absence of these rules, indeed, States as well as private operators have refrained from investing in the exploitation of space resources so far. The time to change this situation and to allow the exploitation of extraterrestrial resources to begin has finally come. This paper aims at fulfilling this purpose by proposing a legal regime containing specific and detailed rules to regulate the exploitation of the natural resources of the Moon and other celestial bodies.

• 항공우주정책ㆍ법학회지
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• 제23권1호
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• pp.131-168
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• 2008

The exploitation of the natural resources of the Moon and other celestial bodies represents one of the most exiting future developments in the field of space law as well as a unique occasion for the economic and social growth of mankind as a whole. The large number of benefits that are expected to be generated from the exploitation of these resources, indeed, not only will contribute to the betterment of conditions of people on Earth but also will allow mankind to face and likely solve one of the biggest problems currently affecting our planet, namely the exhaustion of the stocks of raw materials and other source of energy, such as fossil fuels. The exploitation of the natural resources of the Moon and other celestial bodies, however, has been prevented so far by the absence of dedicated space law rules allowing its orderly and peaceful development and clarifying the rights and duties of the parties involved in it. Due to the uncertainty generated by the absence of these rules, indeed, States as well as private operators have refrained from investing in the exploitation of space resources so far. The time to change this situation and to allow the exploitation of extraterrestrial resources to begin has finally come. This paper aims at fulfilling this purpose by proposing a legal regime containing specific and detailed rules to regulate the exploitation of the natural resources of the Moon and other celestial bodies.

• 사회경제평론
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• 제38호
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• pp.163-198
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• 2012

본 연구의 거시동학모형은 전통적인 포스트 케인지언 성장 분배모형에 기업부채라는 금융변수를 고려함으로써 기업부채와 자본축적 간의 동학적 관계를 구축하고 있다. 이 거시동학모형에 기초하여 본 연구는 우리나라의 자료를 이용하여 정부의 금융지출이 자본축적에 미치는 효과를 실증 분석하고, 1997/98년 외환위기를 전후하여 축적 레짐의 전환이 발생하였는지를 실증 분석하였다. 실증 분석 결과, 금융시장 안정화를 위한 정부의 금융지출은 자본축적 경로에 긍정적으로 영향을 미쳤음을 알 수 있었다. 본 연구의 실증 분석 결과는 금융(경제)위기가 발발할경우 정부의 적극적인 금융시장 개입을 지지한다. 한편, 본 연구는 1997/98년 외환위기 전후 축적 레짐에 변화가 발생하였을 것으로 추측할 수 있는 상당한 근거를 발견하였다.

• 한국경제지리학회지
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• 제14권4호
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• pp.486-505
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• 2011

한국의 경제발전은 세계적으로 잘 알려져 있고, 또한 많은 이론화의 대상이 되어 왔다. 이에 견주어 한국발전의 공간적 차원에 대해선 그렇지 못해 왔다. 사실, 한국의 지역(산업)정책은 한국의 발전레짐을 공간적으로 업그레이드시키는 데 주효한 역할을 했다. 이 논문은 한국의 지역산업정책을 산업경제를 바탕으로 했던 구지역정책과 신지식경제를 바탕으로 하는 신지역정책으로 구분하되, 특히 후자의 성공적 작동 요인을 분석하는 데 초점을 두고 있다. 한국경제의 선진화와 더불어 직면하게 되는 새로운 지역정책의 도전을 살펴보면서 지역정책의 향후 보완과제도 함께 검토한다.

• 노동경제논집
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• 제40권4호
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• pp.91-114
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• 2017

본 연구는 자녀의 학습능력이 다를 수 있음을 가정할 때 부모의 교육지출 수준과 자녀수 선택에서 자녀의 학습능력을 고려하지 않고서 동등 수준으로 교육에 투자하는 통합적 균형(pooling equilibrium)과 자녀의 학습능력에 따라 차등적으로 교육에 투자하는 분리적 균형(separating equilibrium)이 존재할 수 있음을 보여준다. 이러한 두 가지 균형중 어떠한 균형이 나타날지는 학습능력 차이에다 학습능력이 뛰어난 자녀를 가질 확률에 의존한다. 분석결과, 본 연구는 통합적 균형에서는 통합적 선택의 결과가, 분리적 균형에서는 분리적 선택의 결과가 그렇지 않은 경우에 비해 인적자본의 증가율이 더 높은 수준임을 보여주었다. 또한, 학습능력이 뛰어난 자녀를 가질 확률이 높아질수록 분리적 균형에서의 인적자본 증가율이 통합적 균형에서보다 높았다.

• 과학기술학연구
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• 제2권1호
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• pp.63-83
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• 2002

이 논문에서는 한국 과학기술정책의 시기별 특성과 전체적 특성을 검토하였다. 과학 기술정책의 발전단계는 형성기, 성장기, 전환기로 구분하였다. 한국에서는 과학기술의 진홍을 위한 제도적 기반이 공업화의 초기 단계부터 갖추어졌고, 1980년대 이후에는 정부연구개발사업이 전개되는 가운데 민간 부문의 기술혁신활동이 급속히 증가했으며, 1990년대 후반에는 과학기술정책에 대한 새로운 이념이 모색되면서 관련 법령 및 계획이 정비되기 시작하였다. 과학기술정책의 전체적 특성은 정책레짐이란 개념을 바탕으로 분석하였다. 지금까지 한국의 과학기술정책은 산업발전을 가장 중요한 정책목표로 삼아왔고, 정책수단의 측면에서는 외형적 투입요소가 증가하는 양상을 보였으며, 관료 중심의 정책문화가 지배적이어서 경제문화, 학문문화, 시민문화는 충분히 발전하지 못했다.

• Biotechnology and Bioprocess Engineering:BBE
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• 제8권6호
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• pp.349-353
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• 2003

The physiological characteristics of cultures of very high cell mass (e.g. 10g cell mass/L), termed“ultrahigh cell density cultures”is reviewed. A close relationship was found between the length of the optical path (OP) in flat-plate reactors and the optimal cell density of the culture as well as its areal (g m$\^$-2/ day$\^$-1/) productivity. Cell-growth inhibition (GI) unfolds as culture density surpasses a certain threshold. If it is constantly relieved, a 1.0cm OP reactor could produce ca. 50% more than reactors with longer OP, e.g. 5 or 10cm. This unique effect, discovered by Hu et al. [3], is explained in terms of the relationships between the frequency of the light-dark cycle (L-D cycle), cells undergo in their travel between the light and dark volumes in the reactor, and the turnover time of the photosynthetic center (PC). In long OP reactors (5cm and above) the L-D cycle time may be orders of magnitude longer than the PC turnover time, resulting in a light regime in which the cells are exposed along the L-D cycle, to long, wasteful dark periods. In contrast, in reactors with an OP of ca. 1.0 cm, the L-D cycle frequency approaches the PC turnover time resulting in a significant reduction of the wasteful dark exposure time, thereby inducing a surge in photosynthetic efficiency. Presently, the major difficulty in mass cultivation of ultrahigh-density culture (UHDC) concerns cell growth inhibition in the culture, the exact nature of which is awaiting detailed investigation.

• 한국양식학회지
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• 제20권1호
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• pp.56-59
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• 2007

Effect of dietary nutrient composition on growth and body composition of juvenile olive flounder Paralichthys olivaceus with different feeding strategy was determined. Twenty-five fish averaging 16 g were randomly distributed into 12, 180 L flow-through tank each. Four treatments in triplicates were prepared: fish were fed to satiation twice daily by the control diet for 8 weeks as the control group (Con) and fish were fed to satiation twice daily by the control and high nutrient diets for 6 weeks after 2-week fasting (2WS-6WFC, 2WS-6WFHN, respectively) and finally, fish were fed to satiation twice daily by the high nutrient diet for the consecutive 3 days after 4-day fasting for 8 weeks (4DS-3DFHN). No significant difference was found in either survival or weight gain of flounder among treatments. Feed efficiency ratio (FER) for fish in the 2WS-6WFHN treatment was significantly higher than that for fish in the Con and 2WS-6WFC treatments. Protein efficiency ratio (PER) of fish in the 2WS-6WFHN and 4DS-3DFHN treatments was significantly higher than that of fish in the 2WS-6WFC treatment. In conclusion, manipulation of dietary nutrient composition and/or feeding strategy can effectively improve growth of juvenile olive flounder without growth retardation at restricted feeding regime.