OTEC(Ocean Thermal Energy Conversion) system using the temperature difference between cooler deep and surface ocean waters is one of the renewable energy. But in Korea, OTEC system can not apply except in winter because surface sea water temperature is not enough. C-OTEC(Combined OTEC) system is that utilizes temperature difference between sea water and the condenser of power plants via working fluid. It can be a good alternative in the warm surface sea water for Mid-latitudes region like Korea. In this study, a marine survey using multi-beam echo sounder, single-beam echo sounder and sparker seismic wave is performed and sea water intake pipe line is proposed for the 10kW C-OTEC Pilot Plant.

In this paper, patent trend on the rapid prototyping technologies is analyzed. The results show that USA has the most patents, the largest citations, and the highest CPP(Citations Per Patent) at the rapid prototyping field, and that 3D SYSTEM in USA has the most patent filings among the whole world company. and STRATASYS in USA is ranked with the highest CPP representing a technology impact in that field. It is shown that molding or bonding technology of plastic is occupied 31% by International Patent Classification Index(IPC).

The night time electric cost is cheaper due to electric supply and demand policy in Korea from 1985. Currently about 900,000 customers are using night time electric heating boilers and this causes shift of peak demand time to night in winter and increase of deficit spending. To solve this problem, replacing night time electric heating boiler by air-source heat pump using night time electricity has been proposed. An air-source heat pump can provide efficient heating equipment especially in a warm climate. For estimating the night time electric heat pump COP(Coefficient of Performance), Korean Standard KS C 9306:2010 and European Standard EN-14511:2004 is available. SCOP(Seasonal COP) using European weather bin data is also calculated. SCOP is not available yet but European Committee for Standardization will establish a standard in the near future. The evaluation result show that the replacing night time electric heating boiler by heat pump can be possible.

This work aims to : establish a model of the container physical distribution system of Pusan port comprising 4 sub-systems of a navigational system, on-dock cargo handling/transfer/storage system, off-dock CY system and an in-land transport system : examine the system regarding the cargo handling capability of the port and analyse the cost of the physical distribution system. The overall findings are as follows : Firstly in the navigational system, average tonnage of the ships visiting the Busan container terminal was 33,055 GRT in 1990. The distribution of the arrival intervals of the ships' arriving at BCTOC was exponential distribution of Y=e-x/5.52 with 95% confidence, whereas that of the ships service time was Erlangian distribution(K=4) with 95% confidence, Ships' arrival and service pattern at the terminal, therefore, was Poisson Input Erlangian Service, and ships' average waiting times was 28.55 hours In this case 8berths were required for the arriving ships to wait less than one hour. Secondly an annual container through put that can be handled by the 9cranes at the terminal was found to be 683,000 TEU in case ships waiting time is one hour and 806,000 TEU in case ships waiting is 2 hours in-port transfer capability was 913,000 TEU when berth occupancy rate(9) was 0.5. This means that there was heavy congestion in the port when considering the fact that a total amount of 1,300,000 TEU was handled in the terminal in 1990. Thirdly when the cost of port congestion was not considered optimum cargo volume to be handled by a ship at a time was 235.7 VAN. When the ships' waiting time was set at 1 hour, optimum annual cargo handling capacity at the terminal was calculated to be 386,070 VAN(609,990 TEU), whereas when the ships' waiting time was set at 2 hours, it was calculated to be 467,738 VAN(739,027 TEU). Fourthly, when the cost of port congestion was considered optimum cargo volume to be handled by a ship at a time was 314.5 VAN. When the ships' waiting time was set at I hour optimum annual cargo handling capacity at the terminal was calculated to be 388.416(613.697 TEU), whereas when the ships' waiting time was set 2 hours, it was calculated to be 462,381 VAN(730,562 TEU).

참깨 다수성신품종육성의 중요성에 비추어 다수계통의 선발에 관한 기초정보를 얻고자 참깨 82품종을 공시재료로 하여 기대되는 선발지수와 수량에 대한 관계효율을 산출한 바 그 결과를 요약하면 다음과 같다. 1. 선발대상형질을 4개로 하여 이들 조합에 따라 선발된 유전진전은 2개형질의 조합에 있어서는 개화일수와 주당착삭수, 3개 형질조합에서는 개화일수, 착삭부위장, 주당착삭수와 개화일수, 착삭절수, 주당착삭수가 다른 형질의 조합보다 높았다. 2. 단일형질에 있어서 유전진전치는 주당착삭수가 가장 높았다. 3. 형질별 또는 형질의 조합별로 작성된 유전진전은 전형질의 조합이 가장 높았으나 실제선발 시는 무리가 있을 것으로 추정되었다. 따라서 유전진전치에 대한 관계비율도 개화일수와 주당착삭수 또는 개화일수와 착삭부위장 및 주당착삭수나 개화일수와 착삭절수 및 주당착삭수의 조합들이 높아 이들 형질들을 선발대상으로 한다면 실제의 선발효과를 높일 수 있을 것으로 생각된다.

여러 인삼농가포장에서 행별로 수량, 결주 및 이병주를 조사하였다. 평당수량은 결주율과 부의 상관이었다. 행간에 대부분의 포장에서 수량에 유의차가 있으나 결주율은 유의차가 없었다. 행별수량기여율은 전3행에서는 20% 이상이었다. 평균결주율은 32% 생존주에 대한 이병율은 24%, 건전주율은 53%였다. 결수율은 이병율과 유의 정식관이 있었다. 이상의 결과는 행별수량은 현행일복방식에 영향을 받으나 결주와 수량감소를 초래하는 발병은 영향받지 않으며 따라서 수량증대에는 일복개량과 병해방제의 두 길이 있음을 시사한다. 평균수량한계는 3kg으로 보였다.