3차원 전산화단층촬영 영상을 이용한 안면 연조직 두께 계측의 임상적 유용성

정호걸,김기덕,한승호,허경석,이제범,박혁,최성호,김종관,박창서 대한구강악안면방사선학회 2006 Imaging Science in Dentistry Vol.36 No.2

Purpose : To evaluate clinical usefulness of facial soft tissue thickness measurement using 3D computed tomographic images. Materials and Methods : One cadaver that had sound facial soft tissues was chosen for the study. The cadaver was scanned with a Helical CT under following scanning protocols about slice thickness and table speed; 3 mm and 3 mm/sec, 5 mm and 5 mm/sec, 7 mm and 7 mm/sec. The acquired data were reconstructed 1.5, 2.5, 3.5 mm reconstruction interval respectively and the images were transferred to a personal computer. Using a program developed to measure facial soft tissue thickness in 3D image, the facial soft tissue thickness was measured. After the ten-time repeation of the measurement for ten times, repeated measure analysis of variance (ANOVA) was adopted to compare and analyze the measurements using the three scanning protocols. Comparison according to the areas was analyzed by Mann-Whitney test. Results : There were no statistically significant intraobserver differences in the measurements of the facial soft tissue thickness using the three scanning protocols (p>0.05). There were no statistically significant differences between measurements in the 3 mm slice thickness and those in the 5 mm, 7 mm slice thickness (p>0.05). There were statistical differences in the 14 of the total 30 measured points in the 5 mm slice thickness and 22 in the 7mm slice thickness. Conclusion : The facial soft tissue thickness measurement using 3D images of 7 mm slice thickness is acceptable clinically, but those of 5 mm slice thickness is recommended for the more accurate measurement.

林土의 有機物의 分解速度와 無機養料의 垂直分布에 關한 考察

金遵敏,張楠基,鄭玩鎬 서울대학교 교육대학원 학술연구회 1966 論文集 - 서울대학교 교육대학원 Vol.3 No.-

Kim Choon Min, Chang Nam Kee and Chung Whan Ho: Decomposition rate of plant residue and the vertical distibution of mineral nutrients in the woodland soil. The relationship between decomposition rate of litter and the amount of mineral nutrients dispersed to the soil horizons were studied on the oak and pine forest stand. The results are as follows: 1. Decomposition rate of litter was highest in the F horizon of the oak stand, however in the pine stand it was highest in H horizon. 2. The correlation coefficients between decomposition rate and humus, organic carbon, moisture content, calcium, phosphorus, and nitrogen in the pine stand are; 0.90, 0.98, 0.76, 0.98, and 0.88, in oak stand; 0.97, 0.93, 0.92, 0.97, 0.74 and 0.73. 3. Factors which affect the decomposition rate of litter are humus, organic carbon, moisture content, calcium, phosphorus and nitrogen. 4. Among the variables, PH, moisture content and phosphorus under the oak and pine forest showed significant differences in each horizon. 5. C/N ratio of pine stands is higher than that of oak stands studied. 6. The vertical distribution of mineral nutrients is highly related with the amount of humus accumulated on top soil.

복어중독에 의한 가사 상태에서 소생한 1예

송승찬,신진호,강석우,박경남,최호순,박근태,문희식,기춘석,이성희,윤병철,노우균,조균석,이민호 大韓應急醫學會 1998 대한응급의학회지 Vol.9 No.3

Tetrodotoxin is a neurotoxin produced by about 90 species of puffer fish and causes paralysis of central nervous system and peripheral nerves by blocking the movement of all monovalent cation. Ingestion of tetrodotoxin produces clinical manifestations such as paresthesias(within 10-45 min), vomiting, lightheadedness, salivation, muscle twitching, dysphagia, difficulty in speaking, convulsion and death that expressed by cardiopulmonary arrest with loss of brain stem reflex sometimes. Tetrodotoxin prevents or delays ischemia induced neuronal death by way of following 3 mechanisms. Firstly, it reduces the energy demand of the brain tissues. Secondly, it delays or even prevents anoxic depolarization. Finally, it deminishes ischemia induced cell swelling and cerebral edema. We report a case of puffer fish poisoning which presented with cardiopulmonary arrest and loss of brain stem reflex, but completely recovered by aggressive cardiopulmonary resuscitation.

단어경계에서 영어 폐쇄음의 인지 양상 연구

김지향(Kim, Ji-Hyang),김기호(Kim, Kee-Ho) 언어과학회 2015 언어과학연구 Vol.0 No.73

The purpose of this paper is to investigate how the patterns of the perception of English stops in word boundaries are related to those of their production. As was discussed in Kim, Ji-Hyang and Kim, Kee-Ho (2014), the closure duration of the stops in the word boundaries, the duration of VOT, and vowel duration are said to be the main characteristics of the production of English stops by the English and the Korean speakers. Based on this, it will be examined in this paper how the three factors play a role in the perception of English stops in word boundaries by the English and the Korean listeners.

HPV에 감염된 자궁경부 상피세포의 Keratin 아형 변화에 관한 연구

기근홍,이영미,장원재,임용,임성철,김창원,전호종 조선대학교 1994 The Medical Journal of Chosun University Vol.19 No.2

The human papillomavirus (HPV) are wide spread in the world, causing proliferation of epidermal and mucosal surface. Certain papillomaviral types are oncogenic in vivo and in vitro. HPV DNA has been detected in most of cervical lesions such as condyloma acuminata, dysplasias, and invasive carcinomas. The materials for this study consisted of 5 dysplasias. 5 squamous cell carcinomas, and 5 exocervix for control, that resected for definite treatment of uterine disease at Chosen University Hospital from January, 1991 to December, 1993. All cases were performed of in situ hybridization for HPV DNA type 6/11, 16, and 18. And also immununohistochemical stain for panel of monoclonal cytokeratin (CK) antibodies were done. The result obtained is as fallows : 1. HPV DNA type 6/11 are detected in all dysplasias. HPV DNA type 16 and 18 are detected in squamous cell carcinomas. 2. Stratifed squamous epithelium of exocervix are positive staining for CK 1, CK 5/6, CK 8, CK 13, CK 14, and CK 19. HPV DNA type 6/11 infected cells are positive for CK 1, CK 13, CK 14, CK 17, CK 18, and CK 19. HPV DNA type 16/18 infected cells are positive for CK 1, CK 5/6, CK 10, CK 13, CK 14, CK 17, CK 18, and CK 19. In conclusion, HPV infection of uterine cervix is associated with change of normal cytokeratin expression pattern. Dysplastic cells are changed of CK 5/6, CK 8, CK 17 and CK18. Squamous cell carcinoma cells are changed of CK 8, CK 17, and CK 18.

백서 담관폐쇄에 의해 증식된 세담관의 조직기원에 관한 연구

기근홍,전호종 朝鮮大學校 附設 醫學硏究所 1991 The Medical Journal of Chosun University Vol.16 No.2

Bile ductules are lined by flat or cuboidal epithelium connecting bile canaliculi between hepatocytes in the portal tracts. These bile ductule were proliferated in obstructive disease of hilary tract. But, the histogenetical origin of these hyperplastic bile ductules following biliary obstruction has not been established. Some people assume that they originate from liver cells, others think they are derived from preexisting ducts, and by anothers to be developed from intermediate cell types between biliary epithelium and hepatocytes. An experimentally induced biliary obstruction in the rat by ligation of common bile duct, and bile ductules was assesed by light microscopy, immumohisto- chemistry, and electron microscopy. The results were obtained that a biliary cirrhosis with proliferating ductules developed 21 days after ligation of bile duct and these were identical to preexisting bile ductules in ultrastructural observation. And also, numerous mitosis of bile ductules were observed, It was concluded that hyperplastic biliary ductules were derived from biliary epithelial cells in preexisting bile ductules vy cell division.

사립체 DNA 뉴클레오타이드 3243 A→G 돌연변이 [MTTL1^*MELAS3243G]에 의한 MELAS 증후군

박기형,김승현,이영주,김희태,김주한,김명호,박성섭 대한신경과학회 1998 대한신경과학회지 Vol.16 No.4

傳統景觀의 環境 素材的 理解 : 均衡과 調和의 視覺的 解決 A Visual Solution of Balance and Harmony

鄭基浩 서울대학교 환경대학원 부설 환경계획연구소 1995 터전 Vol.3 No.-

해당정보없음

다양한 형태를 가진 다수 클러스터의 자동 추출

이기철,이기호 弘益大學校 科學技術硏究所 2000 科學技術硏究論文集 Vol.11 No.-

In the past decade, knowledge extraction from raw data has been extensively studied. Recently, spatial data mining has become an important area as geographic information systems are affecting people more in many areas. In this paper, a novel clustering method is suggested in which various forms of clusters may be detected in reasonable time. Conventional clustering algorithms like k-means, DBSCAN, CURE, ROCK, PAM, and Birch decide clusters of fixed forms like circles. If spatial data to be clustered are not distributed in the fixed forms, they cannot find the clusters as they are. CHAMELEON, recently developed, solved the problem and can find clusters of various forms. However, its processing time increases too rapidly to be usable for real world data. In this paper, two methods are suggested to overcome the time restrictions. The first one is to select representative data using k-means and apply basic CHAMELEON methods. The second one is called the ADF method and works as follows. First, many small clusters are constructed using k-means method. The rationale behind this is that arbitrary cluster may be thought to be many smaller circles. Using relative distances between clusters, merging is applied again and again until some threshold value is reached. For experimentation, various forms of 2 dimensional data have been created and for those sets of data the perfolniances of CHAMELEON, EF-CHAMELEON, and ADF are compared. The results show that our method is very fast and can produce good clusters comparable to CHAMELEON. Despite success of proxy cache in the internet, proxy cache is not efficient for multimedia stream such as video and audio. In this paper, we propose a new proxy cache policy and a efficient cache replacement algorithm for multimedia stream. We expect that a new proxy cache policy is efficient for multimedia stream.

單純slab橋의 動的解析에 관한 硏究

김기대,함충호 大邱大學校 科學技術硏究所 1998 科學技術硏究 Vol.5 No.4

In this paper, the analytical and experimental treatments of dynamic behavior of beams with moving loads are shown by using mode superposition technique. Therefore, this study analyzes dynamic behaviors of simply supported slab bridge subjected to vehicle loads of constant velocities. The purposes of this study are to propose the proper dynamic analysis algorithm and the impact factors considering the above numerical results. The results by the proposed method are compared with those of field vehicle tests. As a result, it is found that the proposed procedure could provide the accurate estimation of dynamic analysis of bridge, and appeared applicable to real structures such as multispan, nonuniform beams. Moreover, the impact factors specified in the design codes seem to be higher value than the results of the experiment.