• Title/Summary/Keyword: 구경

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Study on Location Characteristics and Establishment Time of Cherry-blossom Attractions in the Modern Era Busan (근대 부산에서 벚꽃 명소의 입지적 특성과 성립 시기에 관한 연구)

  • Kang, YoungJo
    • Journal of the Korean Institute of Landscape Architecture
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    • v.44 no.5
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    • pp.47-58
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    • 2016
  • In modern era Busan, newspaper articles about cherry blossom attractions from FuzanNippo and ChosenJiho have changed from places of landmark cherry trees to recreational activities under the cherry blossom. This means that the place characteristics of the cherry blossom attractions helped transform modern Busan. This study is to clarify the real image of the cherry blossom attractions where they were and when it was established in modern Busan. In order to discuss the location characteristics and the timing of identification as it changed from cherry-blossom viewing spots to picnic spots under the cherry blossom, current articles published in the FuzanNippo and ChosenJiho were collected. This study results are as follows: First of all, cherry blossom attractions are located in private gardens, gardens at hot spring inns, public lands such as schools, temples, reservoirs and malls such as Dongnae hot spring and the Midoricho red-light district. The location feature was that they were found at the edges of settlement environments, at the interface of city and natural spaces in modern Busan. Secondly, newspaper articles about cherry blossom attractions gradually changed from cherry blossom viewing spots to picnic spots under the cherry blossom, which became the peak of the cherry blossom attractions in modern Busan. The main focus of cherry blossom attractions changed from cherry-blossom viewing to picnicking under cherry blossoms around 1920. This means that the establishment of cherry blossom attractions can be seen around 1920. Articles of cherry-blossom viewing picked up sites not easy to access such as private gardens and reservoirs, articles about picnic spots under cherry blossoms noted public places that everyone could access. Cherry blossom attractions sites became spring resorts in modern Busan.

지상용 광학망원경 현황과 전망

  • Kim, Yeong-Su
    • The Optical Journal
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    • s.112
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    • pp.18-21
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    • 2007
  • 국내에는 구경 2m 이하의 중소형망원경이 많이 설치 운영되고 있는데 최근 시민천문대의 급증으로 지상용 소형망원경의 수요가 비약적으로 늘었으며 이러한 수요는 꾸준히 이어질 것으로 전망된다. 문제는 이들 50cm 이상의 망원경 중에서 국내에서 제작된 망원경은 손꼽을 정도로 경험이나 기술력 면에서 선진국에 비해 뒤떨어진다는 것이다. 그러나 구경 1m 이하의 소형망원경을 제작하는 기술들이 국내에서 개발 및 향상되고 있고 망원경을 제작하려는 기업들도 많아지고 있다. 천문연도 60m 망원경을 건설한 경험을 바탕으로 산연 협동으로 1m 망원경을 개발할 계획이다.

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Technology Development for Testing of Precision Optics (정밀 광학계 평가기술 연구)

  • 이윤우;송재봉;이인원
    • Proceedings of the Optical Society of Korea Conference
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    • 2000.08a
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    • pp.50-51
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    • 2000
  • 최근에 결상광학계는 광학유리를 사용한 전통적인 단순 구면형에서 플라스틱, 금속 등의 소재와 비구면 혹은 홀로그래피 광학소자를 이용한 복합적 기능형으로 발전하고 있다. 또한 엑스선에서 적외선까지 매우 넓은 분광영역에서 현미경으로 관찰할 수 있는 미소광학소자부터 구경 10 m 정도의 대구경 망원경까지 다양한 크기의 초정밀 결상광학계가 계속 개발되고 있다. 즉 구경 100 mm 정도의 구면 광학계에서 광대역 분광영역의 대구경 비구면 광학계로 발전하고 있다.$^{(1)}$ (표 1 참조) (중략)

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Effects of Prochloraz and Tebuconazole on Control of Fusarium Bulb and Root Rot of Oriental Orchid, Cymbidium goeringii (Prochloraz와 Tebuconazole의 Fusarium oxysporum에 의한 춘란(Cymbidium goeringii) 구경썩음병 방제효과)

  • Jee, Hyeong-Jin;Lee, Sun-Mi;Cho, Weon-Dae
    • Research in Plant Disease
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    • v.9 no.2
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    • pp.72-78
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    • 2003
  • Eight fungicides including prochloraz, tebuconazole, benomyl, mancozeb, thiophanate-methyl, azoxystrobin, and fluazinam were examined for their control effects on Fusarium bulb and root rot of oriental orchid, Cymbidium goeringii. Among the chemicals, prochloraz and tebuconazole were the most effective on suppression of the causal pathogen, F. oxysporum in vitro and on control of the disease in vivo. Prochloraz and tebuconazole inhibited mycelial growth of the fungi 95~100% at 10ppm a.i. and microconidial germination 75~100% at 100ppm a.i. Prochloraz and tebuconazole showed 80~92% and 84~88% protective control value on the disease, respectively. However, curative effects on infected orchid were relatively low. Other chemicals showed no or lower than 20% curative and 50% protective control value. Results indicated that prochloraz and tebuconazole can be used for the control of the Fusarium bulb and root rot of oriental orchids. However, the chemicals need to be applied prior to the disease development to achieve successful control efficacy.