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방사선상 enhancement 정도에 따른 측모두부방사선규격사진 계측점 설정의 재현도
유황석,황현식,김왕식,김경근 전남대학교 치의학연구소 2001 구강과학 Vol.13 No.4
The purpose of this study was to evaluate the reproducibility of lateral cephalometric landmarks according to radiographic image enhancement, and to contribute to the identification of cephalometric landmarks. Lateral cephalograms of ten individuals were taken and stored into computer. The images were then enhanced up to four grades by Quick Ceph Image Pro^TM on condition that the gray-scale equalization number was 50 and the detail enhancement number was 50. After thirty two landmarks were identified on monitor images by five observers, the deviations from the mean, the distances estimated between identified points and the mean point of five identified points, were evaluated for each landmark at each enhancement grade. Through the statistical analysis, following results were obtained. 1. In case of unenhanced radiographic images, the inter-observer reproducibility of the landmarks showed a large variation. 2. The comparison of deviation from the mean according to the degree of radiographic image enhancement for each landmark showed that the inter-observer reproducibility was significantly different at 5 landmarks. 3. The landmark of pterygomaxillary fissure showed higher reproducibility at enhancement grade 1 and 2 images that at unenhanced images. So did the landmark of posterior nasal spine at enhancement grade 1 images, and the landmark of menton at enhancement grade 2, 3 and 4 images respectively. The above results suggest that the reproducibility of some landmarks can be increased by radiographic image enhancement during the identification of the lateral cephalometric landmarks on the monitor.
GIS를 이용한 소도시 생태현황 지도작성에 관한 연구 보은군을 대상으로
신계종, 황의진 한국교통대학교 2016 한국교통대학교 논문집 Vol.51 No.-
The problem for the environment, social development, as is the situation that is emerging as a social being. How to actively address these environmental problems is appropriate to proceed to establish a management system for a number of the administration, but administration. It is effective for this management system to produce a topographical map to go through the administration thereof. Biotope maps in managing these environmental problems legitimacy and appropriate for use in the regulation of development and to study the mapping of the ecological status
DSM를 이용한 소규모 지형변화 분석 연구 : - 한국교통대학교를 대상으로 -
신계종, 천병석, 유영걸 한국교통대학교 2017 한국교통대학교 논문집 Vol.52 No.-
This study compared high precision orthophoto and point cloud Digital Surface Model (DSM) and Digital Elevation Model (DEM) created by using drone digital image on small area with existing 1:1000 scale digital map and aerial photogrammetry. In doing so, the study attempted to examine quick revision and renewal method of the changed area as well as topographical change of the small target area. And, the quantitative change volume of the target area analyzes change with topographical data and qualitative change volume analyzed characteristic change of ground surface.
Hwnag, Hyungtae,Oh, Heejung 한국통계학회 2002 Communications for statistical applications and me Vol.9 No.3
P-values are often perceived as measurements of degree of compatibility between the current data and the hypothesized model. In this paper, a new concept of Bayesian p-values is proposed and studied under the non-informative prior distributions, which can be thought as the Bayesian counterparts of the classical p-values in the sense of using the concept of significance level. The performances of the proposed Bayesian p-values are compared with those of the classical p-values through several examples.
Hwnag, Jae-Sam,Go, Hyun-Jeong,Goo, Tae-Won,Yun, Eun-Young,Choi, Kwang-Ho,Seong, Su-Il,Kim, Sung-Kuk,Lee, Sang-Mong,Kim, Iksoo,Kim, Nam-Soon,Kang, Seok-Woo Korean Society of Sericultural Science 2004 International Journal of Industrial Entomology Vol.9 No.1
As an initial step to define the molecular mechanism of diapause during embryogenesis of the silkworm, Bombyx mori, mRNA transcripts from diapausing eggs and diapause-activated eggs were compared by differential expression using cDNA microarray. Twenty-four individual cDNA clones were identified. Amomg them, ten genes including alcohol dehydrogenase, dead box-l, cytochrome oxidase subunit I and 18 wheeler showed increased expression in the diapause-activated eggs. The rest of fourteen genes showed increased expression in diapausing eggs.
Game theory for trasmission power control of cognitive radio
Hwnag, In-Kwan,Lee, Ryong-Kyoung,Cho, Hae-Keun,Ko, Eun-Kyoung,Lim, Yeon-Jun 충북대학교 컴퓨터정보통신 연구소 2006 컴퓨터정보통신연구 Vol.14 No.3
In this paper, the Game Theory based power control for OFDM system is studied, which has attained intensive interest as a core artificial intelligent technology for Cognitive Radio and its efficiency is evaluated using performance metrics such as system throughput and fairness. Utility Function for joint user centric and network centric power control is defined and simulation results show that game theory based power control is far better than closed loop power control. The contribution of this paper is to formalize the game theory based power control toward the Cognitive Radio that recognizes and adapts to the radio communication environments.