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조용진,윤예지,이규승,이동훈 한국농업기계학회 2017 바이오시스템공학 Vol.42 No.2
Purpose: Damage to pulse crops by wild birds is a serious problem. The damage is to such an extent that the rate of damage during the period between seeding and cotyledon stages reaches 54.6% on an average. In this study, a crop-position detection method was developed wherein infrared (IR) sensors were used to determine the cotyledon position under a vinyl mulch. Methods: IR sensors that helped measure the temperature were used to locate the cotyledons below the vinyl mulch. A single IR sensor module was installed at three locations of the crops (peanut, red lettuce, and crown daisy) in the cotyledon stage. The representative thermal response of a 16 × 4 pixel area was detected using this sensor in the case where the distance from the target was 25 cm. A spatial image was applied to the two-dimensional temperature distribution using a non-integral moving-average method. The collected data were first processed by taking the moving average via interpolation to determine the frame where the variance was the lowest for a resolution unit of 1.02 cm. Results: The temperature distribution was plotted corresponding to a distance of 10 cm between the crops. A clear leaf pattern of the crop was visually confirmed. However, the temperature distribution after the normalization was unclear. The image conversion and frequency-conversion graphs were obtained based on the moving average by averaging the points corresponding to a frequency of 40 Hz for 8 pixels. The most optimized resolutions at locations 1, 2, and 3 were found on 3.4, 4.1, and 5.6 Pixels, respectively. Conclusions: In this study, to solve the problem of damage caused by birds to crops in the cotyledon stage after seeding, the vinyl mulch is punched after seeding. The crops in the cotyledon stage could be accurately located using the proposed method. By conducting the experiments using the single IR sensor and a sliding mechanical device with the help of a non-integral interpolation method, the crops in the cotyledon stage could be precisely located.
趙容璡 忠州大學校 1983 한국교통대학교 논문집 Vol.16 No.2
The method of flow frequency analysis currently in common use are the Log Pearson typeⅢ, Hazen, Gumbel, Gamma and graphical distribution-free method. In this study, the applicability of Log Pearson typeⅢ distribution was used for determining flood frequency at 8 gaging stations in the Gum and the Yong San river basin. As the result of this inverstigation I reached the conclusion that the coefficient of Skew varies from 0.133 to 0.826 at the Gum river basin and from 0.376 to 1.484 at the Yong San river basin. Therefore, computation of flood frequncy used average coeffiint of Skew, 0.4 at the Gum river basin and 0.8 at the Yong San river basin. The frequency curve was plotted by Log Pearson typeⅢ method on nomal probability paper in fig.(1∼8)
李元鎬,趙容璡 忠州大學校 1993 한국교통대학교 논문집 Vol.28 No.-
This study was performed to investigate water pollution level and dischaging load of the up-stream area of Dal Cheon. The results are as follows: 1. BOD concentration of Dal-Cheon river was shown to high level for May∼August in the rainy season, and low level for October∼March in the dry season. As the results, it was shown that rainfall influenced water quality of Dal-cheon river. 2. The annual average of Biochemical Oxygen Demands(BOD) were 2.2mg/ℓ at the influent area of the tributary of Dong Jin Chon, Which Was Polluted showing over 1.8mg/ℓ∼3.2mg/ℓ of BOD in average(the 2nd to 3rd/grade in environmental water quality standards) 3. The main cause of the deterioration or pollution of water quality has been from the polluted tributaries which flow into the Dal-cheon river. Since this pollution level of the tributariers has not decreased, adequate control measures must be necessary.
헤모글로빈에 있어서의 수학적 모델들의 성질에 대한 연구
조용진,박지현 순천향대학교 기초과학연구소 2002 순천향자연과학연구 논문집 Vol.8 No.1
자연에서 일어나는 여러 가지 현상에 대해 수학적인 모델로 많이 다루어졌다. 여기에서는 헤모글로빈에 대한 수학적인 모델을 알아보며 특히, 산소 분자가 헤모글로빈에 결합하는 방법을 달리 하여 연구하였다.