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이규빈,이정은,제병일,이용재,박영훈,최영환,손병구,강남준,강점순,Lee, Gyu-Bin,Lee, Jung-Eun,Je, Byoung-Il,Lee, Yong-Jae,Park, Young-Hoon,Choi, Young-Whan,Son, Beung-Gu,Kang, Nam-Jun,Kang, Jum-Soon 한국환경과학회 2020 한국환경과학회지 Vol.29 No.3
The purpose of this study was to investigate the effects of defoliation treatment on the growth and yield of strawberries. There was a remarkable growth in the above-ground part and root of untreated strawberry plants possibly due to higher amount of photosynthesis, while overall plant growth was suppressed as the level of defoliation treatment increased. In both the "Seolhyang" and "Maehyang" cultivars examined, defoliation treatment resulted in small fruits and a low number of fruits per plant. Notably, 50% defoliation significantly reduced the number of fruits per plant to 8.2, compared to 13.8 in untreated plants. Defoliation treatment also negatively influenced the fruit quality including color, sugar content, and solid-acid rate. However, no significant changes in fruit firmness was observed in either cultivar. Therefore, retaining enough leaves without defoliation treatment can be important to increasing fruit yield, producing high quality fruits and saving labor required for defoliation.
이규빈,이정은,제병일,이용재,박영훈,최영환,손병구,강남준,강점순,Lee, Gyu-Bin,Lee, Jung-Eun,Je, Byoung-Il,Lee, Yong-Jae,Park, Young-Hoon,Choi, Young-Whan,Son, Beung-Gu,Kang, Nam-Jun,Kang, Jum-Soon 한국환경과학회 2020 한국환경과학회지 Vol.29 No.2
The purpose of this study was to investigate the effect of shading on the growth and productivity of strawberries. Photosynthesis was normally achieved under natural light without shading treatment, and vegetative growth of under- and aboveground part of strawberry plants were excellent. Strawberry fruit productivity and quality were different depending on shading conditions. In natural light, they were improved possibly by balanced vegetative and reproductive growth. However, under light-shading conditions with insufficient sunshine, photosynthetic activity deteriorated and carbohydrate production was therfore inadequate; this adversely affected plant height and quality. The negative effects were more pronounced at 50% shading condition. Shading treatments resulting in insufficient sunshine had a detrimental impact on plant productivity and growth; this implies that proper shading conditions could heip improve yield and fruit quality.
이규빈,최장규,박영은,정건호,권도희,조광룡,천충기,장동칠,진용익,Lee, Gyu-Bin,Choi, Jang-Gyu,Park, Young-Eun,Jung, Gun-Ho,Kwon, Do-Hee,Jo, Kwang-Ryong,Cheon, Chung-Gi,Chang, Dong Chil,Jin, Yong-Ik 한국농림기상학회 2022 한국농림기상학회지 Vol.24 No.3
Due to abnormal weather conditions caused by climate change, natural disasters and damages are gradually increasing around the world. Global climate change as accompanied by warming is projected to exert adverse impact on production of potato, which is known as cool season crop. Even though, role of potato as a food security crop is expected to increase in the future, the climate change impacts on potato and adaption strategies are not sufficiently established. Therefore, this study was conducted to analyze the damage pattern of potatoes due to high temperature treatment and to evaluate the response of cultivars. T he high temperature treatment (35~38℃) induced heat stress by sealing the plastic house in midsummer (July), and the quantity and quality characteristics of potatoes were compared with the control group. T otal yield, marketable yield (>80 g) and the number of tubers per plants decreased when heat treatment was performed, and statistical significance was evident. In the heat treatment, 'Jayoung' cultivar suffered a high heat damage with an 84% reduction in yield of >80 g compared to the control group. However, in Jopung cultivar, the decrease was relatively small at 26%. Tuber physiological disturbances (Secondary growth, Tuber cracking, Malformation) tended to increase in the heat stress. Under heat conditions, the tubers were elongated overall, which means that the marketability of potatoes was lowered. T he tuber firmness and dry matter content tended to decrease significantly in the heat-treated group. T herefore, the yield and quality of tubers were damaged when growing potatoes in heat conditions. T he cultivar with high heat adaptability was 'Jopung'. T his result can be used as basic data for potato growers and breeding of heat-resistant cultivars.
이규빈 ( Gyu Bin Lee ),박은지 ( Eun Ji Park ),허유 ( You Heo ),손병구 ( Beung Gu Son ),최영환 ( Young Whan Choi ),이용재 ( Yong Jae Lee ),박영훈 ( Young Hoon Park ),서정민 ( Jeong Min Suh ),강점순 ( Jum Soon Kang ) 한국환경과학회 2015 한국환경과학회지 Vol.24 No.6
The present study was conducted to development mass production methods for peanut sprouts that is considered as a field of blue ocean among the agricultural products. ``Jopyeong`` was the best as a major cultivar for peanut sprouts production. The manual for the production of high-quality peanut sprouts is as following. Germination temperature appropriate for production of high-quality peanut sprouts was 27℃. Peanut sprouts at the growth stage of 8th day, and older plants with advanced growth showed deteriorated merchantable and eating quality. Resveratrol compound was not found in the seeds, but its highest amount was detected from 9-day old sprouts. The best water temperature applicable to high quality peanut sprout production was 25℃. The growth of peanut sprout was inhibited by the high temperatures above 35℃ and low temperatures below 15℃.
이상 고온 조건이 딸기의 생육, 수량 및 생리활성 성분에 미치는 영향
이규빈 ( Gyu-bin Lee ),이정은 ( Jung-eun Lee ),제병일 ( Byoung-il Je ),이용재 ( Yong-jae Lee ),박영훈 ( Young-hoon Park ),최영환 ( Young-whan Choi ),손병구 ( Beung-gu Son ),강남준 ( Nam-jun Kang ),강점순 ( Jum-soon Kang ) 한국환경과학회 2019 한국환경과학회지 Vol.28 No.1
In this study, we investigated the influences of abnormal high temperature on growth, yield and physiologically active substances of the strawberry. General strawberry cultivars in the 20℃ growth condition showed much better growth of leaf number, length, diameter along with plant height, compared with those in 22.5℃ or 25℃. But the cultivars of both ‘Sulhyang’ and ‘Mehyang’ showed good growth and development at 25℃ with the roots showing great growth at 20℃. The quality and yield of the strawberry were best in the 20℃ growth condition, but the merchantability deteriorated in the 25℃ high temperature condition. As for the content of the physiologically active substances of the strawberry, it increased at 20℃, the optimum growth temperature, but decreased at 25℃. The physiologically active substances in the strawberry differed among the cultivars, the contents of cyanidin-3-glucoside, cinchonine, ellagic acid and cinnamic acid higher in the ‘Mehyang’, whereas the content of fisetin is higher in the ‘Sulhyang’ cultivar.Consequentially, the high temperature in summer has a negative effect on the physiological active ingredients of the strawberry, which was increased in the strawberry cultivated at proper temperature, and high quality strawberry production was possible.
풀리를 이용한 어깨 바깥돌림 운동 시 아래팔의 자세가 상지 근활성도에 미치는 영향
이규빈 ( Gyu-bin Lee ),황정민 ( Jung-min Hwang ),이동엽 ( Dong-yeop Lee ),유재호 ( Jae-ho Yu ),김진섭 ( Jin-seop Kim ),김성길 ( Seong-gil Kim ),홍지헌 ( Ji-heon Hong ) 대한신경치료학회 2021 신경치료 Vol.25 No.2
Purpose The Aim of this study is to determine the muscle activity of the upper extremity depending on the forearm position during the shoulder external rotation exercise. Methods 23 normal adult males were selected to perform shoulder external rotation exercises using three different position (supination, neutral, and pronation), while subject’s shoulder and elbow was at 0° abduction and 90° flexion, respectively. Electromyography (EMG) was attached to the infraspinatus, posterior deltoid, biceps brachii, triceps brachii, brachioradialis and extensor carpi ulnaris to observe muscle activity. Results With the different positions of the forearm, there was significant difference in muscle activity for the posterior deltoid, biceps brachii, brachioradialis, and extensor carpi ulnaris(p<.05). However, there were no significant difference between the infraspinatus and triceps brachii. Conclusion Shoulder external rotation exercise with a forearm supination position and external rotation can safely be used as efficient method for a rehabilitation of one’s shoulder.
객체 탐지 모델을 활용한 전기 아크 위험성 예측 시스템 개발
이규빈(Gyu-bin Lee),김승연(Seung-yeon Kim),안동혁(Donghyeok An) 한국스마트미디어학회 2020 스마트미디어저널 Vol.9 No.1
전기에너지에 대한 높은 의존도 때문에 국내에서 발생하는 화재 중 전기화재가 상당한 비중을 차지한다. 국내에서 발생하는 전기화재 4건 중 3건이 전선의 단락이나 접촉 불량에 의한 전기 아크에 의해 발생했다. 전기 아크란 절연체 사이에서 발생하는 전기적 전류의 방전 현상으로 순간적으로 상당한 열을 내뿜는다. 아크에 의한 전기 화재를 줄이기 위해서 본 연구에서는 전기 아크 위험성 예측을 목표로 한다. 아크 감지기에서 아크 데이터를 수집하고 시간순대로의 아크 데이터를 기반으로 그래프로 변환하였다. 머신 러닝의 데이터 학습에 서로 다른 시계열 데이터의 수로 변환한 그래프들을 사용하였다. 생성된 학습 모델의 성능을 측정하기 위해서 테스트 데이터를 기반으로 평가를 진행하였다. 결과에서 예측 시 사용하는 시계열 아크 데이터의 수가 20개일 때 예측률이 86%로 우수함을 확인하였다. Due to the high dependence on electric energy, electric fires make up a significant portion of fires in Korea. Electric arcs by short circuits or poor contact cause three of four electrical fires. An electric arc is a discharge phenomenon of electrical current between the insulators, which instantaneously produces high temperature. In order to reduce the fire due to electric arc, this study aims to predict the electric arc risk. We collected arc data from the arc detectors and converted into graphs based on temporal arc data. We used machine learning for training converted graph with different number of temporal arc data. To measure the performance of the learning model, we use the test data. In the results, when the number of temporal arc data was 20, the prediction rate was high as 86%.