• Title/Summary/Keyword: 습도영향

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Control of Bemisia tabaci by Two-Fluid Fogging System (이류체 포그시스템을 활용한 가루이 방제)

  • Kim, Sung-Eun;Lee, Sang-Don;Sim, Sang-Youn;Kim, Young-Shik
    • Journal of Bio-Environment Control
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    • v.20 no.4
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    • pp.394-398
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    • 2011
  • The effect of two-fluid fogging system on the control of Bemisia tabaci in tomato cultivation was evaluated in a greenhouse. The number of Bemisia tabaci was decreased by 87% from the fog treatment for 7 days. During the fog treatment, the mean daily temperature was decreased by $2^{\circ}C$ and the mean daily relative humidity was increased by 3~4% as compared to the non-treatment. The reduction of Bemisia tabaci in the treatment might not be resulted from the differences in temperature and humidity in the greenhouse. The sound coming from the two-fluid fogging system did not affect when it was operated without water inside. Therefore it was concluded that water droplets coming out the nozzle reduced the growth and the movement of whiteflies because the suspension of tiny water droplets were attached on the skin of whiteflies.

A Study on the Polarization Potential Distrbution of a Steel Disc in the Water by Specific Resistance of Corrosion Circumstances (환경의 비저항을 고려한 수중 원강판의 분극전위분포에 관한 연구)

  • 김귀식
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.17 no.2
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    • pp.105-108
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    • 1981
  • The oceanic effect on the climate of the southern coast of Korea was analysed based on the sea surface temperature and in order to study relationships between the fluctuation of the sea surface temperature and that of climatic elements. Meteolorogical data from 1960 to 1979 were used. In the year when difference between the air and water temperature was maximum, the air temperature in southern coast was higher than normal year. A fluctuation of the sea surface temperature plays an important influence to determine the variation of the air temperature in the coastal area. Humidity of the coastal climate depends upon the oceanic effect in summer, but not in winter. This results may be due to prevailing wind effect. The oceanic effect on the precipitation in the coastal area is not found.

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Sea Surface Temperature Related to the Characteristic of the Coastal Climate in the Southern Part of Korea (우리나라 남부해안 기후의 특성과 해면수온과의 관계)

  • 한영호
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.17 no.2
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    • pp.65-69
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    • 1981
  • The oceanic effect on the climate of the southern coast of Korea was analysed based on the sea surface temperature and in order to study relationships between the fluctuation of the sea surface temperature and that of climatic elements. Meteolorogical data from 1960 to 1979 were used. In the year when difference between the air and water temperature was maximum, the air temperature in southern coast was higher than normal year. A fluctuation of the sea surface temperature plays an important influence to determine the variation of the air temperature in the coastal area. Humidity of the coastal climate depends upon the oceanic effect in summer, but not in winter. This results may be due to prevailing wind effect. The oceanic effect on the precipitation in the coastal area is not found.

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Studies on the Wrinkle Resistance of the Silk Fabric I. Wrinkle Recovery behavior of spun.silk fabric (견직물의 방추성에 관한 연구 I. 견방사직물을 중심으로)

  • Bae, Du-Geun;Nam, Jung-Hui;Kim, Jong-Ho
    • Journal of Sericultural and Entomological Science
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    • v.28 no.1
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    • pp.61-65
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    • 1986
  • This work was to realize the wrinkling behavior of spun silk fabric. The results were obtained through the various conditions such as temperature, wrinkling time, wrinkling load and crease recovery time. The obtained results were summerized as follows : 1. Wrinkle recovery of the silk fabric was decreased with the increase of temperature, humidity and the influence of humidity was superior to the influence of temperature. 2. The change of wrinkle recovery depending on the wrinkle recovery time showed the experimental equation (Y=a+b lnT). The wrinkle recovery increased with the lapse of wrinkle recovery time but arrived at the equilibrium position about 300 sec. 3. The value "K1" of the silk fabric in the "Voigt model" was inferior as compared with the polyester and Nylon. 4. The change of wrinkle recovery depending on the wrinkling time was decreased with the lapse of wrinkle recovery time but the change of the value "a" could not be fined. 5. The change of wrinkle recovery depending on the wrinkling load was same as above 4.

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농업기술 - 여름철 강우와 고온에 대비한 시설채소 재배기술

  • Kim, Im-Gyeong
    • 농업기술회보
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    • v.51 no.4
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    • pp.26-27
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    • 2014
  • 지구 온난화의 영향으로 여름철 시설하우스 내부온도는 $40{\sim}50^{\circ}C$이상 상승하는 반면 습도는 50~70%로 낮아진다. 우리나라는 여름철에 비가 집중되고 국지성 호우가 증가하는 추세로 6월부터 고온과 과습으로 인해 수정률이 낮아지고 생리장해가 증가되는 등 생산량과 품질이 저하돼 가격변동이 심한 편이다. 때문에, 여름철에도 안정적으로 시설채소를 생산하고 품질이 향상시키기 위한 환경조절 및 작물관리 기술을 소개한다.

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Development of Full Scale Accelerated Pavement Testing Facility (Full Scale 포장가속시험기 개발 연구)

  • Suh, Young-Chan;Yang, Sung-Chul;Ko, Ji-Hoon;Kwak, Dong
    • 한국도로학회:학술대회논문집
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    • 2001.10a
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    • pp.23-31
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    • 2001
  • 국내 포장가속시험기의 개발은 도로신소재 개발, 중차량 교통하중의 영향분석, 온도 습도에 따른 포장체의 거동분석 등을 현장조건과 유사한 조건에서 실험 가능하게 함으로써 국내 도로분야의 연구 수준을 향상시킬 것으로 기대된다.

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박지인쇄와 제책 - 박지인쇄물, 고난도 제책기술 필요

  • 대한인쇄문화협회
    • 프린팅코리아
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    • v.8 no.4
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    • pp.102-103
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    • 2009
  • 성경, 사전, 서적, 전표 등은 박지에 인쇄, 제책가공 되고 있는 대표적인 인쇄물이다. 이런 인쇄물에는 각기 목적에 따라 적합한 박지가 사용되고 있다. 그러나 박지는 정전기를 갖기 쉽고 온 습도에 영향을 받기 쉽다. 찢어지기도 쉬우며 주름이 지기도 쉬운 성질이 있어 현장 작업자들에게 후지(厚紙)와는 다르기에 취급하는데 어려움을 주기도 한다. 박지의 성질과 작업상의 문제점에 대해 살펴본다.

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