• 대한전자공학회:학술대회논문집
• /
• 대한전자공학회 2003년도 하계종합학술대회 논문집 Ⅳ
• /
• pp.2152-2155
• /
• 2003

Divine bell of king Songdok(3.663m of the height, 2.227m of the diameter, 18,900kg of the weight, 7.7-21.5mm of the thickness), known as the bell of Emille which has been molded in 771 year to the illustrious memory of King Songdok for 34 years is one of culture heritages in the world. Even though the appearance of bell is very beautiful, also the sound of bell was appeared miraculous characteristics of shaking the sky, earth and human. The bell of Emille caused by discontinuous sound in maintaining continuous, strongly emotional sound and moving the mind of human etc, is appeared the 'Macnorlee' phenomenon which having the discontinuous sound in maintaining continuous. So far, it has reasoned out the phenomenon of the bell of Emille. but it was first proved a realized a baby-boiling sound about the bell of Emille according to the comparison and analysis. In this study of bell, we proposed improvement and device of the wooden parts beating the bell why a baby-boiling sound was not heard well as before.

• 수산해양기술연구
• /
• 제48권3호
• /
• pp.256-268
• /
• 2012

The Nemopilema nomurai is a large jellyfish attaining a weight of 200 kg and bell diameter of 2 m when fully grown. To prevent damage to this species, this study determined the acoustic characteristics of N. nomurai using frequencies 38 and 120 kHz. The CPUE of N. nomurai and the averaged SV of 38 and 120 kHz had a lower (+) correlation coefficient and relationship at 120 kHz (R=0.51) than at 38 kHz (R=0.15) was significant. In addition, the averaged SV at 120 kHz was higher than at 38 kHz. The ${\Delta}MVBS_{120-38}$ in section catches ${\geq}97.8%$ wet mass of N. nomurai was -2.2 to 5.6 dB. The ${\Delta}TS_{120-38}$ in situ TS was extracted in sections catches of only N. nomurai by FMT. It was found that the averaged in situ ${\Delta}TS_{120-38}$ were at 0.6 and 0.1 dB. Furthermore, it results showed a close relationship between the bell diameter and TS of N. nomurai. The dominance of smaller N. nomurai (11.0~20.0 cm bell diameter in the air) corresponded to a similar proportion of low TS values (-69.0~-65.0 dB). A small number of larger N. nomurai (25.0~38.0 cm bell diameter in the air) were collected, in which TS values were the highest (-62.0~-58.0 dB).

• 수산해양기술연구
• /
• 제48권3호
• /
• pp.242-255
• /
• 2012

The Nemopilema nomurai a very large jellyfish that has been found in the East China Sea and is now are migrating to Korea and Japan. To investigate the occurrence of N. nomurai based on the changing marine environment of the East China Sea, we conducted field survey in the early summer from 2006-2008. We observed the marine environment using CTD and the occurrence of N. nomurai using FMT and bottom trawling. We caught the most N. nomurai in 2007 and the fewest in 2008 and environment factors influencing its are more sensitive temperature than salinity. Large quantities of N. nomurai with a small bell diameter were caught in 2007 and large individuals with a significant bell diameter were caught in 2008. This appeared which between the catch and bell diameter of N. nomurai had (-) correlation (R=-0.988, p=0.098). Meanwhile, the spatial distribution of N. nomurai concentrations in lower salinity mixed seawater inflow in Changjiang Diluted Water.

• 한국해양학회지:바다
• /
• 제8권2호
• /
• pp.199-202
• /
• 2003

하계 한국남해안에서 보름달물해파리(Scyphozoa: Ulmariidae: Aurelia aurita)의 월별 출현 및 크기와 중량간의 상관성을 연구하였다. 또한 Rotifer와 Artemia sp.를 먹이생물로 하여 먹이섭취 습성을 분석하였다. 보름달물해파리는 크기와 중량간에 상관성이 매우 높았으며 (r=0.930, P<0.001), 6월에는 크기가 6∼9 cm, 7월에는 7∼16 cm, 8월에는 16 cm인 개체가 우점하였다. 먹이섭취율은 크기와 먹이농도에 따라 유의한 차이가 있었다(ANOVA test: P<0.001).

• 한국소음진동공학회논문집
• /
• 제25권11호
• /
• pp.771-778
• /
• 2015

In this work, vibration characteristics of high speed rotary bell cup for paint atomizer are numerically investigated. New type of bell cup model is proposed and additional corresponding models with design parameter variations for length and diameter are constructed. Dynamic characteristics, such as natural frequencies and corresponding mode shapes, are studied for each model as a first step. To investigate operation stability, critical speed of rotary bell cup is numerically analyzed based on Campbell diagram and separation margin between operating speed and critical speed is identified. Unbalance vibration responses are also investigated with respect to design parameter variation, operating speed and balancing quality grade of G. Then the proper design guideline for stable operation of high speed rotary bell cup for paint atomizer is suggested.

• 한국지반공학회:학술대회논문집
• /
• 한국지반공학회 2006년도 춘계 학술발표회 논문집
• /
• pp.530-535
• /
• 2006

The Pusan clays are soft and thick deposits and in some places, they reach even up to 50-70m. So, the pile foundations are inevitable in almost all cases. But they are significantly expansive when the length of the pile reaches about 70m. In this study, a comprehensive parametric study has been carried out in order to reduce the pile length and number of piles required in turn the cost of the foundation for particular building. A belled shaft pile has been optimized for a typical soil profile using the PLAXIS (FEM code). These results have shown a new direction of the pile foundation in Pusan, Korea. The results including the variation of contact pressures at the bottom of the bell, optimization of the angle of the bell and height of the bell in terms of the diameter of the shaft. And also, the design curves have been generated so that they can be directly used for design of belled shaft foundations. However, the structural strength criterion is being checked in the concerned laboratory.

• 한국음향학회지
• /
• 제16권6호
• /
• pp.5-11
• /
• 1997

작금에 皇龍寺 49萬소斤 巨鐘의 행방이 문제가 되는 것은, 최근 경주시가 그 종을 찾아서, 우리 민족 문화의 국보를 되살리고, 이를 경주 황룡사 종루에 복원하면 그 종소리와 더불어 영원할 것이라는 데 있다. 그리하여 해군에서도 최신 장비를 동원하여 그 종이 빠졌다는 동해구를 뒤지고 있다. 그러나, 그 종은 고려 숙종조에 녹여 져서 신종으로 만들어 졌다는 것이 三國遺事 卷三, 皇龍寺 鐘條에 나와 있다는 것을 발견했다. 그리고, 그것을 기준으로 계산해 보니 皇龍寺 巨鐘: 무게 41.0 ton, 높이 3.14 m, 구경 2.44 m 皇龍寺 新鐘: 무게 7.4 ton, 높이 2.07 m, 구경 1.61 m임이 드러났고 종의 收率(종의 무게/입증)이 聖德大王 神鐘은 34.7 %, 皇龍寺 巨鐘은 13.6 % 임을 알았다. 그리고, 1103년에 皇龍寺 新鐘(7.4 ton)이 원 황룡사 거종이 달려있던 자리에 매달려 있다가, 1238년 11월에, 몽고 제3차 침입군에 의하여 황룡사 전체는 타 버리고, 그 新鐘은 지금의 ④번 國道의 course를 따라 토함산맥 제일 낮은 고개를 넘어, 보문양북면 大鐘川동해구로 끌려가서 동해구에서 몽고행 배에 싣다가 그 곳에 빠뜨렸다고 보여진다. 이번에 잘하면 해군이 7.4 ton의 황룡사 신종을 건질 수 있을런지 모른다.

• 원예과학기술지
• /
• 제32권3호
• /
• pp.415-419
• /
• 2014

A Cymbidium variety 'Snow Bell' (C. kanran ${\times}$ C. Jack Frost) was developed at the National Institute of Horticultural & Herbal Science, Rural Development Administration in 2011. A cross between C. kanran with small-sized greenish colored flowers and C. Jack Frost with bright pink colored flowers, was conducted in 1999. Based on flower color, leaf shape, flower stalk, and vigor one line was selected. Evaluation and selection trials were conducted from 2006 to 2010. 'Snow Bell' has a light pink sepal (RHS, R56D), red lip (R56A) and a leaf length of 47.5 cm. The average number of flowers on each peduncle is 13.8 and the flower diameter is 6.2 cm. The characteristics of petals and sepals show some incurve and some spreading. 'Snow Bell' has a vigorous growth and a round flower. It has an adequate peduncle height of 50.7 cm compared with leaf length of 47.5 cm, and start blooming in December. In electronic nose analysis, the degree of fragrance between 'Snow Bell' and the C. kanran was similar and both of them showed strong scents, although they had different fragrance patterns.

• 박물관보존과학
• /
• 제5권
• /
• pp.49-57
• /
• 2004

성덕대왕신종은 서기 771년에 완성되었으며 규모에 있어서나 예술적인 수준에 있어서 탁월한 걸작품으로서 우리 청동문화의 정수이다. 그러나 성덕대왕신종을 주조하기 위해 어디에서 원료를 입수하여 어떻게 배합하고 주조했는지에 대한 사료가 남아있지 않아 성덕대왕신종을 깊이 있게 이해하는 데 한계가 있다. 본 연구는 국립경주박물관에서 성덕대왕신종에 대한 안전진단의 일환으로 점검 과정 중 신종 내부에 돌출된 부분에서 채취한 시료 3점의 분석결과를 정리한 것이다. 성덕대왕신종을 제작하기 위한 원료의 배합비, 주조 당시의 금속조직, 원료의 산지 등에 중점을 두고 조사하였다.

• 한국육종학회지
• /
• 제43권6호
• /
• pp.564-567
• /
• 2011

2003년도에 분홍색의 스탠다드 'Sweet Pink' 품종을 모본으로 수량이 많은 분홍색 스탠다드 'Pink Pearl' 품종을 부본으로 인공교배하였다. 2004년에 116개체의 실생을 획득하여 이들을 대상으로 2006-2008년까지 3차에 거쳐 특성검정을 실시한 후 최종 선발 된 '원교 D1-126'를 'Pink Bell'로 명명하였다. 'Pink Bell'의 화색은 진분홍색으로 RHS 칼라챠트번호 57A이며 화형은 고심형이며 향기는 'Nobless'와 비슷하며, 가시는 매우 적으며, 꽃잎수는 44.5개로써 'Nobless'의 69.0개보다 적었으며, 화폭은 10.4 cm로 'Nobless'보다 약간 컸다. 평방미터당 년간 절화수량은 162본으로 'Nobless'보다 많았으며, 절화장은 69.8 cm 절화경경은 6.8 mm로 'Nobless'와 비슷한 절화형태를 보였다. 또한 절화수명은 12.0일로 'Nobless'보다 우수하였으며, 기호도 평가에서도 'Nobless'보다 우수한 경향을 나타내었으며, 개화소요일수도 'Nobless'에 비하여 매우 빠른 것으로 나타났다.