We have mapped the C 3 H 2 2 12 − 1 01 transition line toward the Sgr A molecular cloud on a 1' grid spacing and derived C 3 H 2 column densities of 3 \~ 7 × 10 14 c m − 2 for molecular clouds of Sgr A. The fractional abundances of C 3 H 2 relative to H 2 are obtained to be 3 \~ 6 × 10 − 9 , which are slightly lower than that for the cold dark cloud TMC-1 but are enhanced by factors of 5-60 compared to those for Sgr B2 and the Orion extended ridge. We also estimate from the C 3 H 2 column densities total masses of \~ 10 6 M ⨀ for two clouds (M - 0.13 - 0.08 and M - 0.02 - 0.07), which are thought to be close to the virial equilibrium. We suggest that the large abundance of C 3 H 2 in Sgr A may be partly due to the activities of the Galactic center.

겉뿌림 산지초지의 조성, 수량, 식생 및 목초품종등에 미치는 3요소(N--O: 0-0-0; 0-10-10; 6-15-15; 12-20-20; 24-25-20 kg/10a/year)와 소석회(0, 250kg/10g; 조성시만 시용)의 시용효과를 구명하는 10년간 시험후, 별도로 토심별 토양의 화학성(I보; pH, OM, T-N, 유효 , 흡수계수, 석회소요량. II보: 치환성 Ca, Mg, K, Na 및 CEC, 염기포화도, 토양보존)을 조사하여 검토하

전라남도 도라지역에 분포하는 개미의 종류와 그의 종조성을 조사할 목적으로 1986년, 1989년, 1990년, 1991년의 4년간 10개 도서의 31개 지역에서 740 colony를 채집하여 동정 한 결과 4아과 30속 54종이 분포하는 것을 확인하였으며, 그 중에 대흑산도 예리에서 채집한 쌍털비늘개미(신칭)와 소안도 맹선리에서 채집된 조개무늬비늘개미(신청)는 한국산 미기록종인 것으로 사료된다. 10개 도라지역에 분포하는 개미의 종조성이 밝혀졌으며 Nomura-Simpson's Coefficient(NSC) 공식에 의한 종류사도를 분석한 바 전라남도 도라지역의 개미상은 연속적이였다

(100) 실리콘 기판에 대해 깊온 비등방성 식각을 행한 경우 식각면의 가장자리에 존재하는 욜균일성은 식각 계면의 격자결함과 기계적 응력에 의한 것임을 판찰할 수 있었다.

The electrical, mechanical and optical capabilities have been tested of the microdensitometer PDS 1010GMS at the Korea Astronomy Observatory. The highest stage of scan speed 255 csu (conventional speed unit) is measured to be 47 mm/s. At this speed the position is displaced by 4 μ m to the direction of scanning and the density is underestimated by 0.4 ∼ 0.7 D . Standard deviation in the measured density is proportional to A − 0.46 , where A is the area of scan aperture. The accuracy of position repeatability is ± 1 μ m , and that of density repeatability is ± ( 0.003 ∼ 0.03 ) D . Callier coefficient is determined to be 1.37; the semispecular density is directly proportional to the diffuse density up to 3.5D. Because the logarithmic amplifier has a finite response time, the densities measured at high scan speeds are underestimated to the degree that speeds higher than 200 csu are inadequate for making an accurate astronomical photometry. After power is on, an about 5 hour period of warming is required to stabilize the system electrically and mechanically as well. On the basis of this performance test, we have determined the followings as the optimum scan parameters for the astronomical photometry: For the scan aperture 10 ∼ 20 μ m is optimal, and for the scan speed. 20 ∼ 50 csu is appropriate. These parameter values are chosen in such a way that they may keep the density repeatability within ± 0.01 D , the position displacement under 1 μ m , and the density underestimation below 0.1D even in high density regions.

반경험적 퍼텐션 에너지 함수를 기초로한 스테틱스(statics) 시뮬레이션에 의하여 여러가지 형태의 C6클러스터들의 결합길이, 결합각 및 에너지를 구한 결과 C6의 평형구조는 정 6각형임을 발견하였다. 직선형과 사이클형의 C7-C10구조에 대해서도 결합길이, 결합각 및 에너지들을 구한 결과 정7각형, 정8각형, 정9각형 및 정10각형이 각각 직선형 구조보다 더 안정함을 발견하였다. 이 결과는 본 논문 1편에서 보고한 C2-C5의 평형구조가 직선형이라는 점과 관련시켜 볼 때 클러스터의 크기가 증가함에 따라 1차원적인 구조로부터 2차원적인 구조로 발전하며, 그 임계크기가 C6 임을 시사하는 것이다.

초지관리용 2종 복합비료를 개발토자 시제품(N-P2O5-K2O-MgO-B2O3: 14-10-12-3-0.2)을 일반단비와 공시하여 비효를 비교검토하였다. 대상초지로는 새로 조성된 겉뿌림 혼파초지(orchardgrass, tall fescue, Kentucky bluegrass 및 ladino clover) 및 기존의 겉뿌림 단파초지(orchardgrass 우점초지)를 공시장소로하여 2년간 시험을 수행하였다. 1보에서는 토양

초지의 유지관리용 2종 복합비료를 개발코자 경기화학(주)의 시제품(N-P2O5-K2O-MgO-B2O3: 14-10-12-3-0.2)을 일반단비와 공시하여 겉뿌림 혼파초지에서 유지관리용 비료로서 비효를 구명하였다. 본 시험에서 토양화학성 및 무기염기의 상호균형(I보), 수량, 식생구성비율 및 목초의 영양성분(II보)에 미치는 영향을 검토하였다. 1. 시험후 토양화학성 변화를 보면 복비구가 단비구보다 Mg함량이 약간 높고 Ca

To analyze reception dishes of Choson Dynasty, the author studied historic book-Youngjeob Dogam Mimiunsek Euigwae (1609, 1610 year) in which the reception dishes for Chinese envoy in Choson Dynasty were described. The rescelts obtained from this study were as follows. 1. Youngjeob Dogam Mimunsek collected food items and necessities for reception of Chinese envoy from each administrative machinery, and they included cerials, fruits, seasonings, teas, wines, tablewares, medicines, etc. 2. The guest roms for Chinese envoy were arranged with table, chest, jar, wine glass, tableware, chopstick, spoon, incenseburner, brazier, candlestick, lantern, cloth, etc.

Two cold-air outbreaks, one occurs in cold winter(1985-86) and the other in warm winter(1986-87) over Korea, are studied to represent maps of means, standard deviations maps and one-point correlation maps based on 1000mb and 500mb height fluctuations with different time scales during the cold-surge events. The filters are designed to isolate fluctuations with long time scales(periods longer than 70 days), intermediate time scales(10-70 day periods), short time scales(periods shorter than 10 days). The height fluctuations with long time scales are very similar to the climatological distributions of the wintertime geopotential height. In case of the intermediate time scales, the fluctuation fields reveal the long-wave patterns composed of 3-4 troughs and ridges around the midlatitude belt, in which trough along the East Asia coast and ridge over the Central Siberia and North Pacific are prominent and nearly stationary during the coldJsurge events. For short time scales, the dominent patterns consist of very short wave trains(wavelength 3000-4000㎞) which propagate sortheastward with a phase speed of 8-10 lat./days from the Barents Sea, through Northeast Siberia, toward Korea. The surface temperature fluctuations with small amplitude during the cold-surge events are coincident with this short wave trains passing through the Korean Peninsula.