• 한국작물학회지
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• 제65권4호
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• pp.353-364
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• 2020

국내 주요 재배 콩 품종을 대상으로 수확 지연 시 강우에 따른 피해 양상 및 수확방법에 따른 종실 및 수량 특성을 분석하고자 본 실험을 수행하였으며, 결과를 요약하면 아래와 같다. 1. 품종별 탈립률의 차이가 나타났으며, 대원콩에서는 강우처리 및 예취 후 비닐피복 에서 40일 수확 지연 시 탈립률이 5.3% 증가하였으나, 풍산나물콩은 강우 무처리 및 예취 후 비닐피복에서 40일 수확 지연 시 41.8%까지 증가하였다. 2. 100립중은 강우처리 및 수확방법에 따라 수확이 지연될수록 입중이 미세하게 낮아지는 경향을 보였으나 강우처리 후 포장 수확한 경우를 제외하고 유의성이 인정되지 않았다. 3. 수량은 대원콩의 경우 강우처리 및 예취 후 비닐피복 할 경우 수량 감소가 가장 크게 나타났으며 적기 수확기 이후 40일 지연 수확할 경우 일당 평균 감수율은 0.8 kg ha^-1, 풍산나물콩은 강우 무처리 및 예취 후 비닐피복에서 적기 수확기 이후 40일 지연 수확할 경우 일당 평균 감수율은 3.4 kg ha^-1로 나타났다. 4. 강우처리 및 수확방법에 따른 이병립률은 유의한 차이가 나타났으며, 수확 지연에 따라 이병률도 증가하였으며, 강우처리 및 포장 수확에서 이병률이 가장 높았고, 40일 지연 수확 시 대원콩은 7.0%, 풍산나물콩은 4.0%로 증가하였다. 5. 강우 무처리시 포장 수확 및 예취 후 비닐피복의 수확방법에 따른 차이는 적었으며, 수확이 지연되어도 95%이상의 발아율을 유지하였다. 강우처리 시 수확 지연에 따라 발아율은 현저하게 낮아졌으며, 포장 수확의 경우 40일 수확을 지연하면 대원콩은 77.2%, 풍산나물콩은 76.5%까지 발아율이 감소하였다. 6. 조단백질 함량은 시험 품종 모두 강우처리에 따라 무처리구에서 다소 높은 것으로 나타났으며, 수확방법에서도 예취 후 비닐피복에 비하여 포장 수확에서 높은 함량을 나타냈다. 조지방 함량은 강우를 처리할 경우 다소 높게 나타났으며, 수확방법에서는 예취 후 비닐피복에서 높은 함량을 보였다. 7. 100립중은 개별 처리에 대한 효과가 적어 처리간 상호적용 효과가 적었으나, 이병립률 및 발아율은 처리간 상호작용 효과가 높았다. 8. 품종별 탈립률의 처리간 상호작용 효과는 수량의 상호작용 효과와 같은 양상을 나타내어, 탈립률이 수량에 가장 영향을 준 것으로 나타났다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1416-1418
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• 2002

In order to examine the thermal properties of the wire materials, we analyzed the shrinkage, the expansion and the form transformation, the surface structure according to the thermal deterioration temperature through the testing method for a heating shrinkage of Korean Industrial Standard(KS C 3004). For IV(600V grade polyvinyl chloride insulated wires), we measured the shrinkage and the expansion rate, analyzed the surface structure using SEM(Scanning Electron Microscope). In the result of this experiment, the shrinkage rate of IV 2.0mm covering was high in comparison with other wires. As the deterioration temperature rises gradually, the covering is molten and harden.

• 열처리공학회지
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• 제25권1호
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• pp.1-5
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• 2012

The purpose of this study is to prepare a high strength fiberglass reinforced metal. Aluminum covering was carried out over carbon materials such as carbon fiber in order to increase their wettability to molten metals such as aluminum. A sputtering apparatus with a cylindrical target was fabricated to carry out the covering. Sputtering was caused by glow discharge between the target and the two anode plates attached to its top and bottom. As the substrate for preliminary test, a thin carbon wire was used instead of carbon fiber, and the wire was placed at the central axis of the target. Aluminium coating was formed on the whole surface of the substrate. The formation rate and structure of coating were varied by controlling the electrical potential of substrate. When the substrate was electrically isolated, coating with columnar structure was formed with a formation rate of $15{\mu}m/hr$. In case of grounded substrate, coating with amorphous structure was formed with a formation rate of $7{\mu}m/hr$.

• 산업공학
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• 제5권1호
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• pp.61-74
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• 1992

Recognizing the lack of empirical studies on the returns to R & D investment in Korean firms, this paper analyzes the relationships between R & D investment and corporate performances measured by sales growth rate, profit rate and PER. The data used here are from 167 firms in 8 different industries covering the period from 1985 to 1989. The results show that the profit rate is strongly correlated with R & D investment. But unlike the results of most studies previously done in the U.S., R & D investment only weakly and insignificantly correlated with sales growth and PER.

• 한국잠사곤충학회지
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• 제35권1호
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• pp.21-27
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• 1993

용천뽕 급상후에 위조억제에 의한 사료가치향상을 목적으로 수원(1989, 1992년)과 춘천(1990년)에서 위조억제자료인 한냉사를 잠좌에 피복하여 가지뽕치기로 누에 사육한 결과는 다음과 같다. 1. 무피복방치상태에서 용천뽕의 뽕잎 수분감모율은 최초 3시간 내에는 개량뽕보다 뚜렷이 많았으며, 용천뽕의 뽕잎위에 한냉사를 피복한 경우에는 6시간내의 수분감모율은 무피복구 보다 건조한냉사구는 7%, 흡수한냉사구는 7~26% 정도 낮았다. 2. 기상환경이 건조한 춘잠기에 용천뽕을 급잠후 한냉사피복사육을 한결과 수견량이 개량뽕 무피복사육보다 7%, 용천뽕 무피복사육보다 9% 증수되었으며, 견층비율이 큰 차이 없는 등의 우수한 효과를 나타내었다. 3. 우리나라의 예년 기상환경보다 약간 다습한 환경에서는 용천뽕 급상 한냉사 피복사육은 용천뽕 무피복사육보다는 사육성적이 다소 우수하지만 개량뽕 무피복사육에는 미치지 못하여 뽕품종 고유의 엽질차를 극복하지 못하였다. 더우기 비오는 빈도가 잦은 환경에서는 한냉사피복사육 효과는 없었다. 4. 한냉사의 종류에 따른 피복효과는 공시한 300호(두께 24.0x10-2mm, 21.5mesh)보다 100호(두께 42.0x10-2mm, 15.2mesh)가 다소 우수하였다.

• 한국농공학회지
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• 제17권2호
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• pp.3758-3762
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• 1975

In order to find out the optimum size of nozzle of the power sprayer in the paddy field, four different sized hole of nozzles were tested on its discharge volume per unit time and its effective covering distance. 1. The discharge rate of each nozzle is proportional to square root of the transmitted internal pressure of liquid, and the discharge coefficient ranges from 0.82 to 0.86 at the pressure of 20 to 30 kg/$\textrm{cm}^2$. 2. The effective covering distance is increased as the size of the hole is larded and also the pressure is increased under under the limited pressure. Generally, the effective covering distance is not greatly increased at the pressure of above 25kg/$\textrm{cm}^2$. The distance from the nozzle to the spot where the largest amount of droplets are dropped is about 14.5m for 3.05mm nozzle and 16m for 4.05mm nozzle in the pressure range from 20 to 25kg/$\textrm{cm}^2$. 3. From the above results it is concluded that the 3mm nozzle with the power sprayers, which are now being supplied to the farmers, can be used for disease and insect control on the paddy field of which block size is 30m${\times}$100m, and operators need not to enter the field for spraying. For the 40m${\times}$100m block, 4mm nozzle should be used with large size of pump which discharge capacity is 60l/min or more.

• 보건행정학회지
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• 제26권1호
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• pp.63-70
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• 2016

Background: Selective health benefit was introduced for decreasing economic burden of patients. Medical devices with economic uncertainty have been covered as selective health benefit by National Health Insurance since December 2013. We aimed to analyze impact of selective health benefit to medical expenditure and provider behavior focused on electrosurgery (ultrasonic shears, electrothermal bipolar vessel sealers) for gastric cancer patients covered since December 2014. Methods: We used the National Health Insurance claims data of 2,698 patients underwent gastric cancer surgery between August 2014 and March 2015. Medical cost and patient sharing per inpatient day were analyzed to verify that covering electrosurgery increased medical expenditure and changed provider behavior from open surgery to endoscopic or laparoscopic surgery. Additionally, we analyzed the claim rate of medical device or goods relating gastric endoscopic and laparoscopic surgery. Results: Medical cost and patient sharing per inpatient day were increased after covering electosurgery as selective health benefit (39,724/1,421 won). However, there were no medical expenditure increases after adjusting claim of electosurgery and patient sharing was decreased 1,057 won especially. The coverage of selective health benefit did not increase the claim rate of medical device or goods related endoscopic or laparoscopic surgery, either. Conclusion: Covering electosurgery decreased patient economic burden and did not change of provider behavior. Expanding selective health benefit is needed to decrease economic burden of severe patients. Further study should evaluate the long term effect with accumulated data.

• 한국환경복원기술학회지
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• 제11권6호
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• pp.81-90
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• 2008

Recently, geofiber(polyester) reinforced soil was added on soil-seed mixture spray to control erosion and to improve vegetation growth on rocky slope sites. This research was conducted to compare vegetation effects and soil hardness on three types of soil-seed mixture spray on stone gabion river bank [A type : soil-seed mixture spray underlying 30cm thick sand with geofiber(geofiber reinforced soil system), B type : soil-seed mixture spray underlying 30cm thick sand without geofiber, C type : soil-seed mixture spray]. Evaluation were made concerning vegetation coverage, soil hardness and moisture content. The results of this study showed that A type system was effective for the growth of vegetation and soil hardness when compareed to B type and C type. A type and B type showed higher covering rate than C type on stone gabion river bank, and especially A type showed the highest covering rate. Soil hardness and water content were high on A type vegetation system compared to B type and C type. We noted that high soil hardness and high moisture content with geofiber(geofiber reinforced soil system) were effective both to control erosion from water current impact and to be high coverage and species of vegetation on stone gabion river bank.

• 한국표면공학회지
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• 제10권3호
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• pp.3-11
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• 1977

3가크롬 鍍金法은 6가크롬 鍍金法의 諸 欠点을 克服할 수 있다는 事실이 알려져 外國에서는 오래 前 부터 工業的 실用化를 위한 硏究가 活潑하게 行하여 졌고, 이중 최근에 發表된 Alecra 3 process는 電着諸特性이 뛰어난 方法으로 裝飾크롬 鍍金 分野에 利用되고 있다고 한다. 本 硏究는 Alecra 3 process의 浴 組成中 개미산칼륨으로, 염화칼륨을 염화나트륨으로 大替한 浴의 電着諸特性을 調査하고 最適 염化크롬의 濃度와 錯化比를 함께 調査하여 다음과 간은 結果를 얻었다. (1) 外觀, 被覆性,均一電着性 및 平均 電析 速度 등은 염화크롬 濃度가 0.4 mol일때 가장 良好하였다. (2) 개미산나트륨 대 염화크롬의 mol比는 염화크롬이 0.4 mol일때 2~3이 比較的 良好한 電着諸特性을 보여 주었다. (3) 개미산나트륨 및 염화나트륨 含有한 鍍金浴의 電着諸特性은 Alecra 3 Process의 特性과 비슷하였다.

• 한국환경복원기술학회지
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• 제5권3호
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• pp.31-39
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• 2002

The main purpose of this study is to select the appropriate wild plants on the rooftop. For the purpose of the experiments, 14 wild plants(12 korean native wild plants and 2 naturalized wild plants) were chosen. As the results of the experiments, the wild plants growing on the culture soil(perlite) Among the 14 kinds of wild plants, such as Chrysanthemum boreale, Taraxacum mongolicum, Aster Koraiensis, Aster yomena, Oenothera odorata, Oenothera lamarckiana, Patrinia scabiosaefolia showed good effects on growth of above ground parts. Therefore, these plants will effective for the rooftop revegation. Callistephus chinensis and Lotus corniculatus var. Japonicus showed good height growth, wherase covering rate was worst. Chrysanthemum boreale, Platycodon grandiflorum, Patrinia scabiosaefolia were plant height, wherase covering rate was not good. As the results of the experiments, the wild plants growing on the culture soil(vermiculite) Taraxacum mongolicum, Aster Koraiensis, Oenothera lamarckiana, Aster yomena showed good effects on growth of above ground parts. Consequently, korean native wild plants such as Taraxacum mongolicum, Aster Koraiensis, Aster yomena and naturalized wild plants such as Oenothera odorata, Oenothera lamarckiana were effective wild plants for rooftop revegetation.