• 한국지역지리학회지
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• 제13권5호
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• pp.495-508
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• 2007

본 연구는 FTA 시대를 맞이하여 위기가 심화된 우리나라 농업/농촌 문제의 해결을 위해 새롭게 인식되고 있는 지역단위 영농조직의 형성에 주목하였다. 구체적으로는 과수묘목재배지역의 영농조직에 대한 개별농가의 인식과 조직내 활동에 대한 참여행태를 분석하였다. 그 결과 지역농업의 경쟁력 제고를 위한 영농조직은 구성원의 사회적 관계 유지보다는 경제적 이익실현을 우선적 목표로 하여야 하며, 추상적인 명분보다는 구체적이고 실질적인 목표를 지향해야 한다. 또한 영농조직은 재배작물의 동질성을 기초로 조직되어야 하며, 조직의 규모는 구성원간의 신뢰여부를 고려할때 내부적 통제와 구성원 상호간에 원활한 상호작용이 가능하도록 적정수준에서 통제될 필요가 있다.

• 한국환경농학회지
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• 제35권4호
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• pp.302-305
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• 2016

BACKGROUND: The northeast district of China, especially Liaoning province, Jilin province, and Heilongjiang province, is one of the largest agricultural production regions in China. These regions play a significant role in ensuring food security. Accumulated temperature such as growing degree days (GDD) is an important environmental factor for plant growth and yield. Therefore, in this study, temporal and spatial distribution of GDD for maize was examined as a basis to estimate the growth and yield of maize in these regions. METHODS AND RESULTS: Meteorological date produced by NASA (MERRA-2) was used to estimate GDD of maize at this study sites. The GDD was calculated from sowing (May 1) to harvesting (Sep. 30). The average GDD of this region between 2010 and 2015 was $1323.0^{\circ}C$ day (595.3-1838.9). The spatial distribution of GDD showed a similar pattern during the different years surveyed. Double cropping for maize could be in only Liaoning province, northwestern Jilin province, and western and eastern Heilongjiang province where the GDD was over $1600^{\circ}C$day. However, The GDD in eastern Heilongjiang province was varied by year. CONCLUSION: The GDD of maize in northeast district of China was varied spatially, but similar among recent six years at the same region. This result can be used to predict growth stage and yield of maize at these regions.

• 대한공간정보학회지
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• 제19권3호
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• pp.41-47
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• 2011

원시 LiDAR 데이터는 벡터 구조이기 때문에 직접 활용 시 처리과정이 복잡해지지만, LiDAR 데이터를 필터링을 통해 정규 가상 격자 형태로 변환하면 데이터 용량이 감소되고 처리 속도가 빠르기 때문에 저가의 장비에서도 처리가 가능하다. 특히 Quadtree와 같은 영상 압축 처리 기법을 적용할 경우, 평활화를 통하여 비지면 요소인 자동차, 수목등이 제거되어 모델링에 유리하다는 장점이 있다. 따라서 본 연구에서는 대용량의 LiDAR 데이터로부터 Quadtree와 영역확장법을 활용하여 지면점을 자동 추출할 수 있는 알고리즘을 제시하였으며, 오차분류기법을 활용하여 정확도를 분석하였다. 그 결과, 지면점 분류 정확도는 98%이상으로 나타나, 지면점 추출에 유리함을 알 수 있었다. 또한 Quadtree와 영역확장법을 활용시 자동차, 수목등의 비지면 요소들을 효과적으로 제거할 수 있었다.

• 한국결정성장학회지
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• 제13권1호
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• pp.1-4
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• 2003

In the present work we consider morphological structure of the faces of BGO crystals grown by Czochralski technique under the conditions of low temperature gradient (0.1~1 deg/cm) and interconnection between the morphological features of faces at the crystallization front and the formation of defects within the crystal volume. It is demonstrated that the {112} faces retain stability while the growing surface deviates from the crystallographic (112) plane up to 1 degree. At larger deviation, the region of the stable facet growth passes either to the region of macrosteps or to the region of normal growth. depending on conditions.

• 한국초지조사료학회지
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• 제20권2호
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• pp.91-96
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• 2000

This research was concluded under dryland condition in Thrace region in 1994-1995 growing season. This experiment was arranged in randomised block design with three replications. Yield and some important yield components (plant height, number of pods per plant, number of seeds per pod and 1000 seed weight) were determined. According to the results, it can be concluded that the best sowing rate and row distance of chickling vetch for the region are $100\;seed/\textrm{m}^2$ and 20 cm, respectively.

• 대한의용생체공학회:학술대회논문집
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• 대한의용생체공학회 1998년도 추계학술대회
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• pp.62-63
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• 1998

In this paper, a new method to find the corpus callosum from sagittal brain MR images is proposed, which uses the statistical characteristics and shape information of corpus callosum. First, we extract regions satisfying the statistical characteristics of the corpus callosum and then find a region matching the shape information. In order to match the shape information, a new directed window region growing algorithm is proposed instead of using conventional contour matching algorithms. Using the proposed algorithm, we adaptively relax the statistical requirement until we find a region matching the shape information. Experiments show very promising results.

• 한국작물학회지
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• 제51권4호
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• pp.295-297
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• 2006

Potassium (K) distribution in rice (Oryza sativa L.) root was studied by confocal laser microscopy, using potassium sensitive fluorescent dye potassium-binding benzofuran isophthalate (PBFI). Significantly high intensity of K-specific fluorescence was detected at the root cap region followed by meristematic and basal regions. A negligible or fainted fluorescence was observed at the root hairs area. These results suggest that K is heavily distributed in the apical area of rice root, which may be required in higher concentration for division and extension of cells, as it is the rapidly growing region of the root, moreover, may also be involved in water uptake by creating osmotic gradient across membranes.

• Asian-Australasian Journal of Animal Sciences
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• 제23권8호
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• pp.1022-1027
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• 2010

Effects of increasing dietary rice straw on chewing activity, ruminal fermentation, and fibrolytic enzyme activity in growing goats were investigated in a $4{\times}4$ Latin Square experiment. The goats were offered four diets with an increasing proportion of rice straw (i.e. 0.05, 0.10, 0.15 and 0.20, respectively, on dry matter basis). Increasing level of rice straw increased ($P_{linear\;effect}$ <0.05) the time spent on eating, ruminating, and chewing. The ruminal pH and acetate: propionate ratio were increased ($P_{linear\;effect}$ <0.05), while the $NH_3$-N concentration was decreased ($P_{linear\;effect}$ <0.01). Increasing level of rice straw in the diet increased ($P_{linear\;effect}{\leq}0.01$) molar proportion of acetate and isovalerate, and decreased ($P_{linear\;effect}$ <0.01) molar proportion of propionate. The CMCase, xylanase and cellobiase activities in the rumen were decreased ($P_{linear\;effect}$ <0.05) with increasing level of dietary rice straw, whereas the avicelase activity was increased ($P_{linear\;effect}$ <0.01). In summary, increased level of rice straw elevated the dietary neutral detergent fibre (NDF) content in the diet and had a great impact on chewing activity and ruminal fermentation.

• 한국경제지리학회지
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• 제9권3호
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• pp.297-317
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• 2006

이 글은 동남권 지역에 형성된 광역적 산업클러스터를 확인하고 그것을 효과적으로 지원하기 위한 방안을 모색하는 데 목적이 있다. 이를 위해 산업클러스터의 광역화와 광역적 거버넌스에 관한 이론 및 선행연구들을 검토하고, 동남권의 기계 금속산업클러스터 형성실태를 분석하였다. 동남권의 산업도시들은 1970년대 후반에 이미 회랑형의 기계 금속산업벨트를 구축하였고 오늘날에는 십여 개의 산업도시들이 긴밀히 연계된 대규모 기계 금속산업클러스터를 형성하고 있다. 동남권 지역에 있어서 산업도시의 연계는 점차 규모가 확대되고 있을 뿐 아니라 제철, 조선, 자동차, 플랜트 분야 등에서 경쟁력이 높아지고 있다. 그리고 지리적 범위도 대구 경북 지역으로 확대되어 이제 그 형태가 목걸이형 혹은 수차(물레방아)형을 갖게 되었다. 그것은 행정구역상으로는 부산, 울산, 경남, 대구, 경북, 전남 일부를 포함하는 것이다. 그리고 이러한 분석에 기반하여, 동남권의 광역적 기계 금속산업클러스터의 산업경쟁력을 강화할 수 있는 정책방안과 거버넌스체계를 모색하였다. 동남권에서 근래에 대두하고 있는 문제는 산업적 연계망의 공간적 범위와 행정구역 간의 불일치이다. 산업클러스터의 광역화에 따라서 이를 효율적으로 지원하는 행정지원체계를 구축하기 위한 현실적인 방안들을 검토하였다.

• 대한의용생체공학회:의공학회지
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• 제17권3호
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• pp.365-372
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• 1996

The researches to acquire diagnostic parameters from ultrasonic images are advanced with the progress of the digital image processing technique. Especially, the detection of endocardial boundary is very important in ultrasonic images, because endocardial boundary is used as a clinical parameter to estimate both the cardiac area and the variation of cardiac volume. Various methods to detect cardiac boundary are proposed, but these are insufficient to detect boundary. In this paper, an algorithm that detects the endocardial boundary, expanding the cavity region from the center using statistical information, is proposed The value of mean and sty:nd, wd deviation in cavity region is lower than those in muscle re- gion. Therefore, if we define the multiplication of mean and standard deviation as homogeneous coefficient, it can lead to conclusion that the pixels with small variation of these coefficleno are cavity region, and extraction of endocardial boundary from cavity region is possible. The proposed method detected endocardial boundary more effectively than edge based or threshold based method and is robuster to noise than radial searching method that has high dependency for center position.