• KOREAN JOURNAL OF CROP SCIENCE
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• v.37 no.3
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• pp.230-236
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• 1992

To study the effects of different nursing methods and transplanting on the growth of the rice plant(Oriza sativa L.hn southern region of Korea, Kumo-byeo, Palgong-byeo and Dong-jinbyeo were transplanted from April 20 to July 20 with 15 days intervals as 8 days seedling (infant rice), 25 days box seedling for machine transplanting and 45 days conventional seedling, respectively. No. of leaves at transplanting were in order of 45 days seedling>25 days seedling>8 days seedling. In 25 days seedling, they were increased as transplanting dates were later from April 20 to June 5, and in 45 days seedling, it showed same tendency until June 5 with Dongjinbyeo, June 20 with Palgong-byeo and Kumo-byeo. Root activity according to the $\alpha$-naphthylamine oxidation activity and rooting activity were higher in order of 8 days seedling>25 days seedling>45days seedling. Panicle formation initiated after maximum tillering stage as transplanting at April 20 with 8 days seedling and 25 days seedling, but it intiated before maximum tillering stage as transplanting at July 20 in Kumo-byeo. and in Palgong-byeo intiations of panicle formation were shown after maximum tillering stage as transplanting until May 20, but June 5 in Dongjin-byeo. However, there was no significant tendency with 45 days seedling. Missing hill ratio were less than 5% as transplanting with 8 days seedling and 25 days seedlingregardless of transplanting periods or varieties.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.30 no.4
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• pp.359-367
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• 1985

This experiment was conducted to study effect of cold water damage on some growth characters related to source and sink at reproductive growth stage in Jinan (sea level 303m). The cold water irrigation duration had irrigated 4, 8 and 12 days at panicle formation stage and reproduction division stage compared to perennial water irrigation. Cold water irrigation shortened culm length and panicle length and degree of panicle exsertion. The shortening effect appeared great at lower internodes when treated at panicle formation stage but at higher internodes when treated at reduction division stage. Cold water irrigation decreased the number of secondary branches and spikelets per panicle, and increased the number of degenerated spikelets being high degeneration when treated at panicle formation stage. Spikelet sterility and impediment of grain filling were affected by duration of cold water irrigation being great when treated at spikelet primodium differentiation stage and reduction division stage in particular. Grain weight was also reduced. Significant relationship existed between spikelets sterility, grain filling and yield. The degeneration of secondary branches and spikelets correlated with leaf area but spikelet sterility and yield with culm length, panicle length and panicle exsertion.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.28 no.5B
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• pp.547-558
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• 2008

With the advent of super cargo ship due to the explosive increase in the amount of cargo shipped via seas, some mega ports are under construction in South Korea, to accommodate the super cargo ship, and some of them already enter their final phase. To sustain the harbor tranquility, mega ports usually comprise huge vertical type breakwaters which are intrinsically vulnerable to the attack of long waves. In this rationale, we present the chamber type breakwater with a circular curtain wall - Eco-breaker 2, to alleviate the reflection of long waves and numerically investigate the hydraulic characteristics of Eco-breaker 2. As a wave driver, we use the Navier-Stokes eq., the most robust wave driver, using SPH (Smoothed Particle Hydrodynamics) and LES (Large Eddy Simulation). For the verification of numerical results, we also carried out hydraulic model test. It is shown that Eco-breaker 2 can effectively alleviate the reflection of long waves with its inherited large organized eddies encompassing the water chamber and some region off the curtain wall of varying size. It is also shown that the scope and strength of large organized eddies strongly depends on the incident wave period, and the reflection coefficient can be lowered to 0.18 by tuning the size of water chamber such that resident time at the chamber is just short of the half period of incident waves. Based on these results, we present the specification of Eco-breaker 2 to boost its use on the development of water environment friendly harbor worldwide.

• Journal of Scientific & Technological Knowledge Infrastructure
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• s.13
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• pp.102-109
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• 2004

생명정보 인프라 구축을 통해 바이오인포매틱스 핵심기술을 축적함으로써 생명정보 전반의 기반기술을 구축할 것이다. 유수 생명정보 데이터베이스에 대한 향상된 검색기능을 제공하고 새로운 개념의 통합검색 관리시스템을 구축함으로써 관련 연구자들의 연구능력을 고취함과 동시에 독창적인 검색시스템으로 보다 풍부한 연구기회를 부여하여 국내 생명정보 연구에 기여할 것이다.

• Aerospace Industry
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• v.66
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• pp.26-29
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• 1999

미국의 항공산업은 바야흐로 백화재방 전성기에 있다. 이것은 항공기의 제조, 운항 등 전분야에 걸쳐있으나 처음부터 이렇게 백가쟁명형은 아니었다. 항공기 제조업계가 최근에 와서 냉전 체제의 종식에 따라 구조조정이 불가피하여 지금은 유수 몇개사로 집중되고 있다. 그러나 운항회사의 경우는 약육강식의 경향이 없는 것은 아니지만 약 20여년 전부터 언제나, 어디서나, 어떤 운임 체계로나 설립도 자유이고 폐업도 자유라는 완전 자유 풍토가 되어있다.

• JOURNAL OF ELECTRICAL WORLD
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• no.2 s.86
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• pp.86-91
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• 1984

수력발전소의 실설을 위한 조사, 계획, 설계에서 제작, 설지공사에 들어가 무수$\cdot$유수시험을 실시하고 관계관청의 사용전 검사를 받고 사용허가를 얻고나면 영업운전에 들어가게 된다. 이로써 수력발전소는 처음으로 실용전원이 된 셈이며 그로부터 오랜기간에 걸쳐 운전과 보수의 관리를 하게 된다. 이번호에서는 최종적인 스탭으로서 수력발전소의 운전보수관리에 관한 요령에 대해 설명함으로써 본주제를 끝맺기로 한다.

• Defense and Technology
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• no.12 s.238
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• pp.18-27
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• 1998

이 글은 국내 유수의 방산업체인 LG정밀의 총괄부사장이자, 방산사업부장으로 재직하고 있는 필자가 지난 7월 서울대학교 최고경영자과정(AMP)을 수료하면서 제출한 논문으로 한국방위산업의 현주소와 제반 문제점을 상세하게 적시하고, 미래 국가경쟁력 제고차원에서의 폭넓은 정책적 대안을 제시하고 있습니다. 독자 제위의 일독을 기대해 봅니다.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.2
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• pp.368-371
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• 2006

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.2
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• pp.68-72
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• 2006

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.2
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• pp.73-77
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• 2006