본 연구는 경삽묘의 생리적 서령과 분무재배시 수확시기가 감자 '대지' 품종의 생육과 수량에 미치는 영향을 조사하기 위하여 실시되었다. 경삽묘는 조직배양묘를 삽목하여 생산하였고 삽목 후 20, 30, 40, 50일된 경삽묘를 분무재배에 이용하였다. 분무재배시 정식 후 60, 70, 80, 90일에 각각 괴경을 수확하였고 수확한 괴경은 1~5, 5~10, 10~20, 20~30, 30~40, 40g 이상의 크기로 분류하였다. 삽목한 후 40일이 경과된 경삽묘의 평균 초장이 전생육기간에 걸쳐 가장 길었지만 정식 후 75일에는 모든 연령의 경삽묘 간의 초장에 대한 유의차는 없었다. 주당 괴경중은 정식 후 90일까지 꾸준히 증가하였으며 삽목 후 20일과 40일된 경삽묘를 정식할 때 가장 무거웠고 주당 괴경수도 가장 많았다. 그러나 50일된 경삽묘를 제외하고 20, 30, 40일된 경삽묘 간에 통계적으로 유의한 차이는 없었다. 정식 후 80일과 90일에 수확하는 것이 5g 이상의 괴경 수확을 증가시키는 것으로 나타났다.

This study was carried out to design and develope conveyer combustion type coal heater in the green house. Different from existing coal heater, the conveyer combustion type coal heater was designed for circulating coal from supplying to exhausting. The size of traveling grate and velocity reduction gear ratio for driving traveling grate were designed to product coal heater had 200,000kcal/hr heating capacity. The result is that the coal heater of 200,000kcal/hr heating capacity was determined by the width of grate in between 600 to 800㎜ when the horizontal length of conveying combustion area was 1,500㎜. And the first and second reduction ratio of 1:100 and 1:70 was more effective at 1,350rpm, respectively, in the coal heater of 200,000kcal/hr heating capacity.

Aluminum nitride (AlN) powders were prepared by the chemical vapor synthesis (CVS) process in the system. Aluminum chloride () as the starting material was gasified in the heating chamber of . Aluminum chloride gas transported to the furnace in atmosphere at the gas flow rate of 200-400ml/min. For samples synthesized between 700 and , the XRD peaks corresponding to AlN were comparatively sharp and also showed an improvement of crystallinity with increasing the reaction temperature. In additions, the average particle size of the AlN powders decreased from 250 to 40 nm, as the reaction temperature increased.

In this study, the effect of slope length and angle at the entrance to fishing pots on the size of captured shrimp was examined to determine the optimal design of pots for use in Hokkaido, Japan. The purpose of the current study was to optimize the design of shrimp pots to allow greater control over the size of captured individuals for the purposes of shrimp resource management. Tank experiments were conducted to determine the optimal slope length and slope angle by analyzing the sizes of shrimp entering 10 model pots with combinations of five different slope lengths on slope angle of current shrimp pot, and five different angles on slope length of current shrimp pot. The results showed that, as the slope length of the pot increased, the size of individuals which entered the pot increased. In addition, as the slope angle was elevated in each of the five different slope angle treatments, the size of individuals entering was also increased.

본 연구에서는 판 두께와 볼트 크기에 따른 고장력 볼트 마찰이음부의 극한 거동을 비선형 유한 요소 해석 및 실험을 통하여 분석하였다. 볼트의 크기 및 모재의 두께가 고장력 볼트 마찰이음부에 끼치는 영향을 미끄러짐 하중, 볼트의 변형 및 파괴하중과의 관계와 함께 파악하였다. M20, M22, M24의 세가지 볼트와 모재의 두께가 12mm, 16mm, 20mm, 30mm, 40mm인 경우에 대하여 압축력을 받는 고장력 볼트 이음부의 극한 거동을 고찰하였다. 이음부의 힘-변위 관계 및 외력-변형도 관계를 실험적으로 도출하였으며 범용 유한요소해석 프로그램인 ABAQYS를 사용한 수치해석 결과와 비교, 분석하였다.

  기간차량경로 문제는 차량용량제약을 고려한 차량경로문제를 다 기간으로 확장한 형태의 문제로 역방향 로지스틱스의 폐기물 혹은 재활용품 수거에 관련된 주요한 운영 문제들 중의 하나로 각 고객에 대해서는 계획기간 중에 방문해야 하는 횟수가 정해져 있어 방문날짜 조합을 결정해야 하며 주어진 방문날짜 조합 하에 각 기간의 차량경로도 결정해야 한다. 주요한 제약조건으로는 차량의 용량제약과 각 기간의 가용 시간제약이 있으며 소요차량의 대수를 최소화하는 것을 목적으

2004년 10월부터 2006년 12월까지 지리산에 방사한 반달가슴곰 7개체를 무선추적하여 연간 행동권 크기를 분석한 결과, 95% MCP에서 반달가슴곰 암컷은 71.66km2, 수컷은 90.20km2로 분석되었다. 계절별 행동권 크기는 암컷곰이 봄 19.8km2, 여름 30.48km2, 가을 22.63km2, 겨울 0.22km2이었고, 수컷곰은 봄 33.47km2, 여름 20.26km2, 가을 23.23km2, 겨울 0.78km2이었다(F=4.193, P〈0.05). 반달가슴곰의 행동권역중 약 38% 정도가 중첩되었고, 암컷간 12.5%, 수컷간 22.4% 정도가 중첩되었다. 서식지 평균 해발고도는 봄 744±236m, 여름 682±253m, 가을 937±218m, 겨울 975±137m로 분석되었다(F=8.526, P〈0.001). 반달가슴곰의 행동권 크기와 위치는 주로 먹이의 분포와 생산량과 밀접한 관계가 있으며, 계절별 서식 환경특성, 연령 등에 따라서도 차이가 있음을 알 수 있었다.

본 논문에서는 다중 균열 구조물에서의 균열 진전에 따른 에너지 해방을 및 고차 미분값을 구할 수 있는 가상균열 진전법을 제시한다. 이 방법은 다중 균열 체계의 에너지 해방율과 고차 미분값이 단 한번의 해석으로 수행될 수 있는 장점이 있다. 예제에서 얻어진 해의 최대 오차는 에너지 해방율 0.2%, 일차 미분값이차 미분값 이다 이 방법으로 구한 에너지 해방률의 미분값들은 파괴 확률을 구하거나, sire effect law에 적용될 수 있다.

The need for total enterprise management that covers from accepting orders, design, cost, procurement, manufacture, and delivery has been recently raised in order for efficient project management of small and medium size plant construction enterprises. This trend is reflected in the introduction of EPM(Enterprise Project Management) solutions by some shipbuilding enterprises and large construction corporations. In step with the trend, small and medium size plant construction enterprises are enabled to provide knowledge base in terms of reducing cost and production period and managing portfolio for accepting orders and attaining contract by inducing customized EPM This study presents a design of customized EPM based on a case study of a company. It exhibits a collaborative/collaboration resource-supply model which can be universally applied to small and medium size job-order production enterprises. The research discusses that under the assumption that information is shared internally between departments on planning, supply, manufacture, and quality control in order to create collaborative environment and close participation is created externally between suppliers and orderers, productivity can be improved in cost reduction through planning efficient collaborative supply model.

Most researches on the corporate credit rating are generally classified into the area of bankruptcy prediction and bond rating. The studies on bankruptcy prediction have focused on improving the performance in binary classification problem, since the criterion variable is categorical, bankrupt or non-bankrupt. The other studies on bond rating have predicted the credit ratings, which was already evaluated by bond rating experts. The financial institute, however, should perform effective loan evaluation and risk management by employing the corporate credit rating model, which is able to determine the credit of corporations. Therefore, in this study we present a medium sized corporate credit rating system by using Artificial Neural Network(ANN) and Analytical Hierarchy Process(AHP). Also, we developed AHP model for credit rating using non-financial information. For the purpose of completed credit rating model, we integrated the ANN and AHP model using both financial information and non-financial information. Finally, the credit ratings of each firm are assigned by the proposed method.

To increase pot life in the formulation mixed with bisphenol F epoxy resin, anhydride-based curing agent, and imidazole-based curing accelerator powders as a paste material for high-speed RFID chip bonding, size variation of the imidazole-based powders and a coating method of the powders were adopted in this study. In experiment with regard to the size variation, the pot life was not outstandingly increased. Through the idea using the coating method, however, the pot life was increased up to 4.25 times in comparison with the addition of initial imidazole-based powders. Consequently, successive bonding of RFID chip could be performed with very short time of 5sec using the suggested formulation having improved pot life.

현행 「항만 및 어항 설계기준」 상 부두의 접안능력은 하기재화중량톤수를 사용하여 나타내고 있으나 접안가능 최대 선박의 결정에 영향을 미치는 요인은 재화중량톤수보다는 선박의 질량이나 길이 및 폭 등이다. 따라서 안전하고 효율적인 항만 운영을 위해 현재의 기준을 개선할 필요가 있으며, 이 연구는 합리적인 접안능력 기준을 제시하기 위하여 수행되었다. 부두의 적정 접안능력을 검토 하기 위하여 울산항의 3개 부두를 선정하고, 통항 및 접안 안전성과 선체동요 및 구조 안정성을 종합적으로 평가하였다. 배수톤수가 일정한 경우 선박의 크기가 다소 증가하더라도 선박조종이나 계류 및 구조 안전성에 미치는 영향은 미미하였으며, 검토 대상 선박에서는 선박의 크기에 따른 유의적인 차이를 보이지 않았다. 평가 결과 배수톤수에 차이가 없다면 20,000 DWT급 선박은 부두접안가능능력의 50%, 40,000 DWT급 선박은 25%, 그리고 150,000 DWT급 선박은 13% 정도 선박의 크기를 증가시키더라도 부두 축조시의 설계기준에 적합한 것으로 검토되었다. 따라서 항로폭, 선회장, 선석 길이 및 계류라인의 배치 등에 문제가 없다면 재화중량톤수 대신에 배수톤수를 적용하여 부두 접안가능 최대 선박을 조정할 수 있다.

This paper reviewed the relationship among safety education/managerial factors, safety motivation and safety appliance, and the moderating effect of safety motivation. Based on the responses from 225 employees in small & medium manufacturing and construction industry, hierarchical regressional analysis showed that all education/managerial factors have positive relationships with safety motivation. Also, safety motivation has mediating effect between education/managerial factors(safety education, communication, system, precautionary activity) and safety appliance.

The ㎝bryonic and postembryonic developments of Nezara antennata Scott were observed in 5 different rearing cages such as A (Cylindrical, ø 10 ㎝ × 4 ㎝), B (Cylindrical, ø 14.5 ㎝ × 2.8 ㎝), C (Rectangle, 6.5 L × 6.5 ㎝W × 10 ㎝H), D (Cylindrical, ø 9 ㎝ in bottom & ø 11.5 ㎝ in upper × 10.8 ㎝) and E (Cylindrical, ø 15 ㎝ × 7.5 ㎝) containing soybean and peanut seeds as food, and sponge soaked with water under laboratory condition of 24℃ and 15L : 9D. Hatchability ranged from 93 to 97%. Nymphal duration was shortest of 6 days in the 1st instar and longest of 10 days in the 5th instar. The nymphal duration was 38 to 39 days observed in the rearing cages. Emergence rate was in the range from 53 to 62% with highest in A and B cages. Adult longevity was 65 to 75 days for male, and 67 to 74 days for female, and was longest in the B cage. Total number of eggs laid by female adult was in the range from 51 to 56 without significant difference in the rearing cages, and was the most in the B cage. Accordingly, the reproductive rate of N. antennata for 1 generation was within 25 to 33 times, and was highest in the B rearing cage. Therefore, it could be concluded that B cage is most suitable for stable rearing of N. antennata under laboratory condition.