• 농업기술회보
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• v.50 no.2
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• pp.36-37
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• 2013

우리나라에서 감자는 거의 연중 생산되며, 최근 저온저장고 등의 산지유통시설이 보급되면서 홍수출하에 따른 가격폭락 현상이 줄어들고 있다. 특히 겨울철 시설감자는 재배하기 쉽고 단경기에 출하되기 때문에 소득 작목으로 크게 부각되고 있으며, 그 면적은 약 1.500ha에 이른다. 그러나 이상기상에 따른 저온피해, 동해, 일조부족 등은 시설감자 생산에 종종 피해를 주고 있으므로, 온도와 토양수분, 광도를 최적 상태로 유지하는 것은 시설감자 생산의 기본적인 요소이다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2003.09a
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• pp.73-76
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• 2003

약용식물로 널리 알려진 가시오갈피는 해발고 900m내외의 서늘한 지역에서 토양이 비옥하고 습기가 많은 활엽수림에 자생하며, 높은 광도와 기온을 나타내는 입지환경에서는 거의 찾아볼 수 없는 것으로 알려져 있다(박문수 등, 1996). 이러한 생육특성 때문에 인공재배를 하는 경우, 차광막을 사용하여 일정량의 빛을 차단하면 전천광을 모두 수광한 것에 비해서 높은 생장을 나타낸다고 한다(한종수 등, 2001).(중략)

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.43-45
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• 2023

현재 운용 중인 전구식 회전식 등명기의 운용현황과 문제점을 알아보고, 이를 개선하기 위한 개선 방향을 검토 후 가장 근본적인 문제 해결을 위한 전구를 대체할 새로운 광원으로 LED를 선정하고 선정된 새로운 광원을 이용한 고광도의 LED 회전식 등명기의 개발에 따른 장점과 기존의 규정 및 검사 방식에 대한 의견을 제시한다.

• Journal of Applied Tourism Food and Beverage Management and Research
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• v.16 no.2
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• pp.175-199
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• 2005

Family Restaurant is a service business of a kind. The role of service operator is to improve a sales of service goods through maximizing the service value with customer satisfaction at the moment of MOT(moment of truth). Family Restaurant come to the great growth on the face of it. In future, it will place emphasis more and more on not hardware but software including service quality. The purpose of this study, therefore, is to research the effect on service quality of the job satisfaction of Family Restaurant's service staff. Data was collected from the employee who are working at Family Restaurant located in Taegu. The empirical research has been done over 50days from 1April, 2004 to 20May, 2004. In conclusion of empirical analysis, 4 hypotheses were significant among 7 hypotheses suggested in this study. The research showed as follows : First, the organic trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed positive influence on job satisfaction. Second, the personal trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed positive influence on service quality. Third, the official trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed negative influence on job satisfaction. Fourth, the organic trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed positive influence on service quality. Fifth, the personal trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed negative influence on service quality. Sixth, the organic trait among the effect factor of job satisfaction perceived by Family Restaurant service staff showed negative influence on service quality. Seventh, the job satisfaction of Family Restaurant service staff showed positive influence on service quality. Besides, the critical points of this study are as follows; First, we designated the subject of research to the employee of Family Restaurant only. Second, multi-situations(time, holiday) which can happen as service was offered, wasn't concerned. Third, as service quality was estimated by general service quality, the research in future should subdivide service quality more. I, finally, applied the pervious researches on job satisfaction and service quality in the employee of Family Restaurant. To extend more this research model in future, the variables like customer satisfaction should be added.

• Journal of Bio-Environment Control
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• v.14 no.3
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• pp.149-154
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• 2005

It is very important to make shorter and healthier pot plants with increased numbers of branch at a growing stage before short-day exposure. Especially light and nutrient conditions directly affect the growth and quality of the plants as described above. In this study, the effects of nutrient strength and light intensity on the nutrient uptake and growth of young Kalanchoe plants (Kalanchoe blossfeldiana 'Marlene') during this growth stage were investigated. The plants were grown under two radiation integral (15.8 and 7.9 $mol{\cdot}m^{-2}{\cdot}d^{-1}$, PPF) and three EC (0.8, 1.6 and 2.4 $dS{\cdot}m^{-1}$) conditions. Leaf area, fresh weight, dry weight and number of branch were higher at a higher PPF, and this tendency was more evident at an EC above 1.6$dS{\cdot}m^{-1}$. The plants became higher at a lower PPF. When the EC was at 0.8 $dS{\cdot}m^{-1}$, the plants did not grow so healthy regardless of PPF conditions. EC decrement in the nutrient solution was increased with increase of nutrient strength. With growth stage, the nutrient uptake was increased with increases of nutrient strength and PPF. At a higher PPF, $NO_3-N,\;K^{+}\;and\;Ca^{2+}$ were much more absorbed, and especially the uptake of $K^{+}$ was 1.1 to 1.5 times greater than that or $NO_3-N$. From the results, the EC needed above 1.6 $dS{\cdot}m^{-1}$ during the seedling stage in order to make more healthy Kalanchoe plants having more leaf area, fresh weight, dry weight and number of branches under adequate light conditions.

• Korean journal of applied entomology
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• v.15 no.3 s.28
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• pp.153-159
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• 1976

Present paper was attempted to investigate the effects of the light on the sclerotium formation of some isolates of Sclerotinia sclerotiorum(Lib.) do Bary from lettuce, cucumber and rape. The investigations were performed in the both aspects inducing sclerotial primordia from the mycelial colony and developing such primordia. The cultures were grown on potato-dextrose agar and were treated with day-light fluorescent lamps. In the continuous light illumination for 21 days, numbers of sclerotial primordia and matured sclerotia were increased with increasing the light intensity up to about 500 Lux, but on the contrary the dry-weight of matured sclerotia was decreased. In the 800 Lux illumination, induction of the primordia was extremely depressed, and then matured sclerotia were almost not produced. Short-time illumination for 48 hours, although the light intensity was as high as 5000 Lux, increased the numbers of sclerotial primordia and matured sclerotia. Dry-weight of matured sclerotia, however, was slightly increased only at low intensity of 160 Lux. On the other hand, the light shock which u·as alternatively on-of light every one minute for 48 hours increased the number and dry-weight of sclerotia produced, but the former was more effective at 500 Lux shock and the later more effective at 160 Lux shock.

• Korean Journal of Optics and Photonics
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• v.26 no.4
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• pp.203-208
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• 2015

Wavelength filters are essential components for selecting a certain wavelength channel of a WDM optical communication system. To realize wavelength filters with narrow bandwidth and high reflectivity, an apodized grating structure with length of 15 mm and index modulation of $5{\times}10^{-4}$ was designed. The device exhibited a reflectivity of 95%, 3-dB bandwidth of 0.28 nm, and 20-dB bandwidth of 0.70 nm on an 18 mm grating length.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.3
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• pp.20-26
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• 2004

In this paper, luminaire optical efficiency and luminous intensity according to array of HB(high brightness) white LED(light emitting diode) and globe types of luminaire were simulated by computer and made a comparative analysis. LEDs were arranged by square of 7ea X 7ea. LED space has been divided into 8.2mm, 10mm and 15mm that mean distances between luminous centers of LEDs, and luminaire globes were classified into 30mm and 50mm 묘묘 from luminous center of LEDs. Also the simulations were made with / without globe, globe types were specified by convex and embossing types of which sizes are 8.2mm and 5.0mm, So total 27 classes of simulation were performed. This paper is to help luminire development using LED light source called digital lighting of 21th century, by studying luminire effciency and luminous intensity of different types of globes.

• Proceedings of the Korean Vacuum Society Conference
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• 2012.02a
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• pp.365-365
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• 2012

본 연구에서는 X-ray 영상을 얻기 위한 검출기 중 직접 검출방식에 쓰이고 있는 광도전체(Photoconductor)의 전극으로 Au를 사용하여 전기적인 특성을 파악하였다. Au는 유기물에 대한 반응이 적고 전기 전도도가 좋은 물질로서 투명전극으로 많이 쓰이고 있는 인듐 주석 산화물(ITO)을 대체할 수 있는 물질로 각광받고 있다. 우선 시편 제작을 위해 투명한 기판(Corning Glass, 0.7t)위에 하부전극으로 Au를 $3cm{\times}3cm$의 크기로 Physical Vapor Deposition(PVD) 방식을 이용하여 증착하였다. 이 때 챔버 내 저진공은 Rotary Pump를 이용하여 $3.9{\times}10-2Torr$ 이하를 유지하고 고진공은 Diffusion Pump를 이용하여 $5.3{\times}10-5Torr$ 이하를 유지하였다. 완성된 하부전극 위에 광도전체인 $HgI_2$를 폴리머 물질에 교반하여 메탈 폴리머 결합을 가진 Paste를 제조하고 이 Paste를 Screen Printing Method를 이용하여 증착 후 건조하였다. 마지막으로 시편위에 상부전극을 하부전극과 같은 조건으로 증착함으로서 시편을 완성한다. 상하부 전극으로 쓰이는 Au의 증착 조건을 변화시키면서 그에 따른 시편의 전기적인 특성 변화를 관찰하였다. 그 결과, Au의 증착온도와 질량에 따라 특성이 변화함을 알 수 있었다. 본 연구의 결과를 통해 디지털 방사선 검출기에서 Au 전극의 적용 가능성을 확인하였으며, 추후 Au 증착 조건의 최적화를 통해 방사선 검출기의 효율 향상을 위한 연구를 하고자 한다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.39 no.4
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• pp.307-316
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• 1994

To investigate the effect of light pretreatment on photosynthetic characteristics of leaf blade of rice, 2 varieties of japonica type and 2 varieties of tongil type were grown under 30% or 70% shading conditions from tillering stage to heading stage. Shading treatment of 70% at the heading stage produced low dry matter, and higher LAR and SLA compared with other combination of shading treatment and growing stage did. Photosynthetic activity was lower in order of 0%, 30% and 70% shading treatment under the low light intensity(5Klux) but significantly high in 30% shading treatment under the high light intensity (33Klux) at tillering stage. Photosynthetic activity under low(5Klux) and high(33Kluk) light intensity were higher in order of 70%, 30% and 0% shading treatment at heading stage. Respiration /photosynthesis ratio was lower in shading treatment than in control. CGR, RGR and NAR decreased in shading treatment. Shading treatment reduced the number of ripened grain per panicle and decreased the harvesting index.