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돈분액비 시용이 호밀의 생산성 및 토양의 이화학적 특성에 미치는 영향
김문철(Moon-Chul Kim),송중용(Jung-Young Song),황경준(Kyoung-Jun Hwang),송상택(Sang-Teak Song),현철호(Cheol-Ho Hyun),강태현(Tea-Hyun Kang) 한국초지조사료학회 2008 한국초지조사료학회지 Vol.28 No.2
돈분액비의 DM 농도와 분시 차이가 동계사료작물의 생산성 및 토양특성에 미치는 영향을 비교하기 위해 2005년 11월부터 2006년 6월까지 제주특별자치도 축산진흥원 사료작물 포장에서 동계사료작물 호밀을 이용하여 수행되었다. 시험은 주구 2처리(고농도 DM 7.0%, 저농도 DM 1.6% 돈분액비), 세구 2처리(기비 100%, 기비 50%와 추비 50% 시용)를 각 각 4반복 분할구법으로 설계하였다. 고농도 돈분액비 시용이 저농도 액비 보다 호밀의 초장과 건물수량에 통계적으로 유의적 증가를 보였다(P<0.05). 호밀의 조단백질 함량은 액비를 기비만 시용하는 것 보다 분시하므로 증가하였다(P<0.05). 돈분액비 시용으로 호밀의 대량무기물 (P, K, Ca, Mg 및 Na)이나 미량무기물 (Cu, Fe, Mn 및 Zn) 함량에 차이를 주지 않았고 동계사료작물 호밀을 재배했던 토양의 이, 화학적 특성에도 분뇨처리 효과가 없었다. 다만 호밀의 평균 P 함량 0.16%는 화본과 작물 적정수준 0.2~0.4% 보다 부족했고 호밀재배 토양의 pH (5.5), OM(13.3%), 유효인산 (47.6 ㎎/㎏) 및 Ca (2.75) 함량은 농경지 토양 수준 보다 부족하였다. 결론적으로 DM 7.0%의 고농도 액비시용은 DM 1.6%의 저농도 액비 보다 호밀의 생산성 향상을 가져 왔으나 재배 토양의 이, 화학적 특성에 변화를 주지 않았다. The study was conducted to investigate the effects of DM (dry matter) content and split application of liquid swine manure (LSM) on productivity of rye and subsequent soil quality on the pasture of Livestock Policy Division, Jeju Special Self-Governing Province. The experiment was done between November, 2005 and June 2006, using split plot design. Treatments were 2 main plots (7.0 and 1.6% DM LSM) and 2 subplots (basal fertilizer 100% and basal fertilizer 50% + top dressing 50%). Application of 7.0% DM LSM resulted in significant increase in DM yield and plant length of rye compared with 1.6% DM LSM (p<0.05). Crude protein content of rye was significantly higher in split application(basal fertilizer 50%+ top dressing 50%) than in basal fertilizer 100% (p<0.05). No significant difference in macro and micro mineral contents of rye or in subsequent soil quality was found by application of LSM. Mean P content (0.16%) of rye appeared to be lower than proper P level (0.2~0.4%) of grass crop. The pH (5.5), OM (13.3%), available P₂O? (47.6 ㎎/㎏) and Ca (2.75 cmole/㎏) content of the pasture soil studied were lower, compared with those of cultivated soil. Results show that the application of a 7.5% DM liquid swine manure increases the productivity of rye compared with a 1.6% DM liquid swine manure, meanwhile the property of pasture soil was not influenced by application of LSM.
윤성혁(Sung-Hyuk Yoon),김문철(Moon-Cheol Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
A water level sensor is used not only for measuring the height of water but also in many applications such as oil gauge or precision test equipment. In this study, the water level sensor has been developed for the purpose of maintaining the accuracy and linearity while taking the shape of the existing capacitor sensor. In addition, the use of Op-Amp and a single plate can realize a cost-effective solution. In order to increase the accuracy, the stable value was obtained as regulating the optimized time constant by adjusting the value of R and C in the circuit. MSE(Mean Square Error) of the linearity error is 1.7%.
이승진(Seung-Jin Lee),김문철(Moon-Cheol Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
In this Paper, More precise sensor system was developed using two color sensors. The near-located sensor detects directly a fluctuation of light energy of a light source and the far-located sensor detects a transmitted light through an object at the same time. The sensing value of the near-sensor applied to the far-sensor value as the reference so that a fluctuation of light energy of LED can be effectively compensated. As a result, the standard deviation of the measured values has been reduced from 0.001 to 0.00001. By the proposed method, LED replacing time can be expanded and additional circuits for constant current (or voltage) is not required.
영상센서의 출력 해상도 모드를 고려한 색상 보간 알고리즘
김부공(Bu-Gong Kim),김문철(Moon-Cheol Kim) 대한전자공학회 2014 전자공학회논문지 Vol.51 No.9
현재까지 단일 영상센서를 사용하는 디지털 이미징 장치들을 위해 다양한 보간 기법들이 제안되어 왔다. 그러나 기존 보간기법들은 주기적 샘플링을 사용하는 영상센서의 출력 해상도 모드를 고려하지 않았다. 따라서 출력 영상에서 해상도 화질 열화 및 color artifacts(color moire, zipper)현상들이 문제점으로 나타난다. 본 논문은 영상센서의 출력 해상도 모드를 고려한 색상 보간 알고리즘을 제안한다. 제안하는 보간 알고리즘은 효과적으로 에지 예측을 보상하는 초기단계와 해상도 모드를 고려하여 최소한의 방향성을 이용한 화질 개선단계로 구성되었다. 기존 기법들과 제안하는 알고리즘 결과를 분석 하기위해 주관적 화질비교와 PSNR(Peak Signal to Noise Ratio)을 통한 객관적 화질평가를 비교하였다. 객관적인 수치와 시각적인 부분에서 기존 기법 대비 color artifacts를 효과적으로 개선하였다. Various interpolations for digital imaging devices with a single image sensor have proposed. However, conventional methods did not consider the resolution modus of image sensor using periodic sampling. Therefore, the resulting images have problems such as quality degradation and color artifacts(color moire, zipper). In this paper, we propose a color interpolation algorithm for pixel resolution modus of image sensor. The proposed algorithm consisted of an initial step to compensate edge prediction effectively and refinement step using minimum directions for pixel resolution modus. To analyze a result of the proposed algorithm with conventional methods, we evaluated subjectively using images quality comparison and objectively using PSNR(Peak Signal to Noise Ratio). Experimental results showed that the proposed algorithm was more successful in eliminating the color artifacts than conventional methods judged by both objective and subjective criteria.
김정태(Jung-Tae kim),김문철(Moon-Cheol Kim) 대한전자공학회 2017 대한전자공학회 학술대회 Vol.2017 No.6
In the display and multimedia devices, the image quality enhancement technology has a lot of significance as a differentiating technique like other imaging functions. Image quality enhancement technology is also important to make prefer image look for the human perception, but it is also necessary to tune the color to reproduce the original image as closely as possible as like image on a standard display because the color gamut of various displays vary depending on a color gamut of displays. In this paper, the color tuning methods and the additional contour compensation are proposed for image quality enhancement.