우리 나라 남해안 연안에 부설된 소형정치망을 실험 수조의 크기 등을 고려하여 그 의 1/50의 크기로 Tauti의 어구 비교법칙에 따라 모형어구를 제작하여 유향 R(원통에서 헛통방향으로).L(헛통에서 원통방향으로)방향과 각각의 유속에 따라 그물 형상의 변화, 각 뜸의 침하량, 멍줄 장력의 변화 들을 측정, 관찰한 결과를 요약하면 다음과 같다. 1. 그물형상의 변화는 유향 R의 경우 유속 0.2m/sec에서 헛통 끝그물이 조하쪽으로 20mm, 상방으로 10mm 이동어구 전체가 바닥으로부터 부상하였고, 유속 0.6m/sec에서는 원통에서 헛통 까지 거의 일직선을 이루었다. 유향 L의 경우는, 상방으로 18mm 이동하여 어구 전체가 바닥으로부터 부상하였고, 유속 0.5m/sec이상에서는 헛통에서 원통까지 거의 일직선을 이루었다. 2. 긱 뜸의 침하량은 유향 R의 경우 머리뜸은 유속 0.2m/sec부터 서서히 침하하시 시작하여, 유속 0.3m/sec에서는 20mm 정도 침하하고, 유속 0.6m/sec에서는 99mm 정도 침하하였다. 그러나, 끝뜸은 유속 0m/sec부터 0.6m/sce까지 침하하지 않고 약간의 요동만 일으켰다. 유향 L의 경우 끝뜸은 유속 0.1m/sec에서부터 서서히 침하하기 시작하여, 0.2m/sec에서는 5mm정도 침하하였고, 0.6m/sec에서는 108mm 정도 침하하였으며, 0.5m/sec에서 머리뜸만 남기고 어구전체가 수몰되기 시작하였다. 3. 멍줄 장력의 변화는 유향 R의 경우 머리뜸 멍줄에 작용한 장력은 유속 0.1m/sec에서 273.51g이며, 0.6m/sec에서는 1298.40g 정도로 증가하였다. 유향 L의 경우 한쪽 끝뜸줄에 걸리는 장력은 유속 0.1m/sec에서 137.08g이며, 0.6m/sec에서 646.00g 정도로 증가하였다. 멍중 장력의 분포는 유속의 증대와 함게 유향 RL 향 모두 조상측 멍줄에 집중하여 나타났으며, 다른 멍줄에는 현저한 장력의 증가는 관측되지 않았다.되지 않았다.

We examine the corecollapse times of isolated, two-mass-component star clusters using Fokker-Planck models. With initial condition of Plummer models, we find that the corecollapse times of clusters with M1/M2 >> 1 are well correlated with (N1/N2)^0.5 (m1/m2)^2 Trh, where (M1/M2) and (m1/m2) are the light to heavy component total and individual mass ratios, respectively, N1/N2 is the number ratio, and Trh is the initial half-mass relaxation time scale. We also find two-component cluster parameters that best match multi-component (thus more realistic) clusters with power-law mass functions.

선망어법의 어회과정에 있어서 어군행동에 관한 기초적인 연구를 목적으로 제주 근해에서 사용하고 있는 고등어 선망어구인 파워불록용 선망(Powetblock seine)과 앞으로 예상되는 단선조작에서의고등어 선망어구인 트리플레스용 선망(Triplex seine)의 두 가지 모형망을 1/180로 제작 하고 선망에 의해 포위된 어군의 망내행동과 양쪽 선단의 개구부를 통하여 도피하는 어군의 행동을 관찰 분석함과 동시에 망단의 개구부의 면적 및 장력변화 등을 해석하였으며, 그 결과는 다음과 같다. 1. 죔줄죄기 소요시간 20분일 때, 개구부로 도피하는 아군의 평균 유영속도는 Powerblcok seine에서 9.71cm/sec, Triplex seine에서 9.97cm/sec였다. 2.죔줄죄기 소요시간 20분중 좀줄을 50% 정도 감아들었을 때, 선망내의 어군은 Powerblock seine의 경우 I section 10%, II section방향으로 10% 유영하는 행동을 보였다. 3.죔줄죄기 소요시간 20분중 10분 경과했을 때, 전면 망단 개구부의 면적 감소율은 Powerblock seine이 63.5%, Triplex seine이 어군도피에 대한 수평적 서단능력이 높았따. 그리고, 좀줄에 걸리는 최대장력은 Powerblock seine이 약 8.1톤, Triplex seine이 8.3톤으로 나타 났는데, 양자의 차이는 그다지 크지 않았다.

Densification behavior and grain growth of tool steel powder compacts during pressureless sintering, sinter forging, and hot isostatic pressing were investigated. Experimental data were compared with results of finite element calculations by using the constitutive model of Abouaf and co-workers and that of McMeeking and co-workers. Densification and deformation of tool steel powder compacts were studied by implementing power-law creep, diffusional creep, and grain growth into the finite element analysis. The shape change of a powder compact in the container during hot isostatic pressing was also studied. The theoretical models did not agree well with experimental data in sinter forging, however, agreed well with experimental data in hot isostatic pressing.

The Nara Dynasty of Japan lasted from 710 to 784 A.D, which corresponds to the period of the Unified Shilla Kingdom of Korea. The Nara Dynasty enacted the 'Daiho Law and Ordinance' by referring to those of Tang Dynasty of China. Under these legal systems, the Ministries were defined, and foods were used for paying taxes or as currency. The characteristics of the dietary culture in Nara Dynasty were as follows. 1) They obtained food from rice and other grain farming, hunting and fishery. Rice was their main staple and was also used for preparing porridge and brewing wine. 2) Under the influence of Buddhism, meat was prohibited, and milks or dairy products were supplemented for improving malnutritional status. 3) They also used seasonings, spices and sweeteners to enhance the taste and produced medicines by extracting plants, animals and minerals. 4) While chopsticks were made of bamboo, willow, silver, shell, tree or bronze, such utensils as pan earthenware steamer, or charcoal pots were used for preparing meals. 5) Highly qualified utensils, made of porcelains painted with lacguetr, metal, glass, horn and stone, were produced as handcraft art wad developed. 6) Chinese style cousines and cooking methods were popular and various types of preserving techniques like drying or salting were used. Processed cookies were also developed. 7) Although flour was used mainly among noble class people, ordinary people also used it. The royal families ate milk products a lot and even fried foods. 8) One can say that Buddism exerted an influence on Vegetarianism from this era.

Flow and heat transfer characteristics of gas, and trajectories and cooling characteristics of droplets/particles in a gas atomizer were investigated by a numerical simulation using FLUENT code. Among several kinds of solution method, the k- turbulent model, power-law scheme, SIMPLE algorithm is adopted in this study. Momentum and heat exchange between a continuous phase(gas) and a dispersed phase(particle) were taken into account. Particle trajectories are simulated using the Lagrangian method, and Rosin-Rammler formula is used for the particle size distribution. Streamlines, velocities and pressures of gas, and trajectories, velocities and cooling rates of particles have been investigated for the various gas inlet conditions. Small but very intensive recirculation is found just below the melt orifice, and this recirculation seems to cause the liquid metal to spread radially. Particle trajectory depends on the particle size, the location of particle formation and the turbulent motion of gas. Small particle cools down rapidly, while large diameter particles solidify slowly, and this is mainly due to the differences in thermal inertia.

The aim of the paper is to analyse the extinction law in the giant H II region NGC 3603. The ratio R is found to be greater than 5.0. In front of the cluster the reddening law is found to be normal. We have obtained a distance of ~5.3 Kpc which is significantly smaller than those adopted so far.

We have analyzed the content of the Korean stone star chart. Ch'on-Sang-Yul-Cha-Bun-Ya-Ji-Do(here-after Ch'on-Sang-Do). In the star map we have found 1468 stars, 4 more than the Chinese star catalog Bo-Chun-Ga. The four extra stars form a constellation, Jong Dae Boo. The map projection law used in the star chart is found to be the polar equtorial and equidistance projection. The linear distance of an object on Ch'on-Sang-Do from the center is linearly proportional to the north polar angular distance. We have found from a statistical analysis that most stars with declination lower than 50 are at positions representing the epoch of around the first century. On the other hand, stars near the north pole with declination higher than 50 are at the epoch of about 1300, which is close to the time the chart was engraved. This implies that the original Ko-Gu-Rye Dynasty's star chart has been revised by astronomers of Cho-Sun Dynasty. We have also shown that stars on Ch'on-Sang-Do are engraved in such a way that their area is linearly proportional to the visual magnitude.