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조원우,엄태원,김정홍 대한이비인후과학회 2014 대한이비인후과학회지 두경부외과학 Vol.57 No.6
Headaches attributed to disorders of the sinonasal region make their diagnosis and treatment sometimes challenging. Contact point between opposing mucosal surfaces in the nasal cavity can cause headache by a mechanism of referred pain in the distribution of trigeminal nerve. The most common anatomic abnormality of intranasal contact point is the diverse pattern of septal deviation in association with turbinate deformity or hypertrophy. In the absence of other pathological findings, the evaluation for intranasal contact points should be considered. We herein report that a patient, suffering from headache and periorbital pain refractory to medical treatment, experienced a complete abolition of pain after surgical correction of mucosal contact point in the nasal cavity. Korean J Otorhinolaryngol-Head Neck Surg 2014;57(6):407-10
Cold Hardiness of 8 Hybrid Poplar Clones for the Introduction to Arid and Semi-Arid Areas
조원우,Romika Chandra,이송희,한지원,이소라,Ganchudur Tsetsegmaa,Khaulenbek Akhmadi,Wi Young Lee,강호덕 한국육종학회 2020 Plant Breeding and Biotechnology Vol.8 No.1
Endodormancy is a key determinant of cold and freezing hardiness in plant cycles. Short plant growth periods and increasing frequencies of frosting caused by increasing temperatures are major environmental challenges faced by trees in arid areas of central Mongolia. In the present study, the primary aim was to determine an effective method for cold hardiness with the use of six introduced and two Mongolian poplar clones. The secondary aim was selecting clones suitable for afforestation in Mongolia. Year old branches were subjected to four temperature treatments to induce cold hardiness. Electrolyte leakage, 2,3,5-triphenyltetrazolium chloride (TTC) reduction, leaf sprouting, and leaf browning rates were compared. High rates of electrolyte leakage and browning rates were observed along with low leaf sprouting at a low-temperature of ‒30℃. Temperatures between ‒25℃ and ‒30℃ damaged certain clones more than others. TTC reduction rate method for determining cold hardiness was considered effective in this case. In addition, Mongolian poplar P. sibirica differed distinctly from other poplar clones owing to the difference in dormancy-breaking whereas DN 247 and DN sim were better adapted to cold hardiness based on TTC reduction rate. These findings suggest that factors such as plant dormancy depth and physiological differences might significantly affect productivity and performance among plants. Evidently, further studies are required using other plant parts for selecting suitable poplar clones.
조원우,김감래,고정석 한국국토정보공사 2010 지적과 국토정보 Vol.40 No.2
유비쿼터스 시대로 표현되는 현재의 상황은 2차원의 속성정보와 위치정보를 3차원뿐만 아니라 4차원의 시간을 적용하여 입체적인 공간정보로 표현하고자 노력하고 있다. 이러한 급격한 기술적·환경적 변화에도 불구하고 3차원 표현에서 가장 중요한 위치를 차지하고 있는 수치표고모형의 정확도에 대한 연구는 초기 영상정합이론에 근거한 이론 및 알고리즘 연구 분야의 부분적 수행 결과 이외에 지속적인 연구 성과가 미흡한 실정이다. 본 연구에서는 다중센서 기반의 위성영상과 디지털항공영상의 센서모델링 기법을 분석하고, 기존의 3차원 모델링 기법과 전역기반의 영상정합 기법에 대한 수학적 모형과 알고리즘에 대하여 적용·분석하였다. 기존의 3차원 센서모델링 기법을 기반으로 전역기반의 영상정합 기법을 적용하여 수치표고모형을 생성하고, 기존 방식으로 제작된 성과와 비교하여 그 결과를 분석함으로써 전역기반의 영상정합 기법에 대한 타당성을 검증하여 수치정사영상의 정확도를 분석하였다. Nowadays, which is called the ubiquitous era, efforts are made to display 2-dimensional attribute information and location information as a 3-dimensional spatial information by applying not only 3-dimensional information but also four-dimensional time. Despite such radical technological, environmental change, studies on the accuracy of digital elevation model which plays the most important role in the three-dimensional display lacks continuous achievements other than partial results in the fields of theories and algorithms based on early theories of image matching. This study analyzed sensor modeling techniques for multi-sensor based satellite images and digital aerial images, and applied and analyzed mathematical models and algorithms for existing 3-dimensional modeling techniques and global image matching techniques. This study created a digital elevation model by applying global image matching technique based on existing three-dimensional sensor modeling techniques, and tested the validity of global image matching technique by comparing with the result manufactured by existing method and analyzing the result of comparison.