한글 문서 구조 분석에 관한 연구

우성준,김광호,유명춘,하진영 강원대학교 정보통신연구소 2008 정보통신논문지 Vol.12 No.-

Although information technology has been developed fast, large amount of machine printed document images are not properly handled due to immature document layout analysis techniques. Previous research has focused on character recognition itself to improve character recognition accuracy. Recently, however, some efforts are made to analyze complex document layout automatically. In this paper, we propose document layout analysis and understanding method for various Hangul document images. Skew detection is performed using projection profile and connected component layout information. Top-down and bottom-up methods are combined to analyze document layout. After text region and non-text region determination, table is further processed to extract row, column, and cell position. We got very high performance for skew correction, zone detection, and table processig from experiments with various Hangul document images.

상악동거상술을 이용한 인공치아 이식 치험례

우순섭,장윤성,김태균,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

Recently many dentists would like to select the implant installation for the restoration of partially or fully edentulous patient. Usually, it is needed at least 8mm of alveolar bone height for implant installation. But, in many cases, the implant installation is impossible due to anatomic limitation such as maxillary sinus, floor of nose, mandibular canal, lack of width, etc. So, dentists must come over these limitations by methods of sinus lift, nerve repositioning, transmandibular implant etc. Especially, a lot of ridges have inadequate bone height at the upper molar edentulous areas, and to insert implant for such sites represents low success rate. So, autogenous or allogenic or alloplastic bone can be grafted before or at the same thme with implant installation. We report a case of 22 year-old woman who was performed implant installation successfully by using sinus lift technique with iliac block bone graft to a patient whose low alveolar bone height made common implantation impossible. Now, she exerts good occlusive function at the time of 15 months after the operation.

원관에서 원통형초크의 비정상유동의 유동특성함수

모양우,유영태,위광한 조선대학교 동력자원연구소 1994 動力資源硏究所誌 Vol.16 No.2

A new instantaneous flowmeter for water hydraulic by means of cylindrical chokes is developed. In this method the instantaneous flowrate through chokes is predicted in real time from measurement of pressure difference on both sides of cylindrical choke. The experimental study for the flowrate of pulsating flow in a pipe is carried out to measure differential pressure drop by using a strain gauge pressure transducer with data acquisition and processing system. A pulsating flow is verified by visualization method. In the present study, the flow charcteristic variables of laminar pulsating flow are investigated analytically and experimentally in a circular pipe. Characteristics parameters of ratio of inertia term and pressure term(Φ_t.1) and ratio of viscous term and pressure term (Φ_z.1) are introduced to describe the flow pattern of laminar pulsating flow.

이중외피 파사드의 운전모델 개발에 관한 연구

박유영,조재훈,여명석,김광우 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1

The objective of this study is to develop the operation model of the double-skin facade for energy conservation and user comfort. This study proposes development process of the operation model in three steps. A case study is used to investigate the feasibility of the process. The G building in Kungkido is chosen. The main contents of this study are as follows. 1) The operation objectives and standards are established. And the operation factors classified according to the objectives and standards. 2) Correlation of the operation factors are clarified. And Individual models. The operation model is essential to building which has the double-skin facade and logical operation would be improved by this model. For the practical application of this operation model, it will be needed to connect the building management system.

치근단 병소의 임상적 연구

김상우,우순섭,유임학,이영수,심광섭 대한악안면성형재건외과학회 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.3

The purpose of this study was to find the clinical features of periapical lesions. A total of 130 periapical lesions which were obtained from biopsy and diagnosed histopathologically as periapical cyst, periapical abscess, and periapical granuloma at the Department of Dentistry in Hanyang University Hospital were throughly analysed according to the distribution and incidence of age, sex, location, and so on. The following results were obtained : 1.Out of 130 periapical lesions, 88 cases(67.7%) were periapical cysts, 30 cases(23.1%) were periapical abscesses, and 12 cases(9.2%) were periapical granulomas. 2.The periapical lesions occurred most frequently in the third decade, and followed by the fourth, fifth, sixth, and second decade. The periapical cysts occurred most frequently in the third decade(26.1%), the periapical granulomas in the fourth decade(33.3% ) the periapical abscesses in the sixth decade(26.7%). 3.The periapical lesions were more frequent in men than in women with the ratio of men to women of 1.4 : 1. The radio of men to women of periapical cysts was 1.6 : 1, that of periapical granulomas was 0.5 : 1, and that of periapical abscesses was 1.3 : 1. 4.The periapical lesions were more frequent in maxilla than in mandible with the ratio of 1.2 : 1. The ratio of maxilla to mandible of periapical cysts was 1.5 : 1, that of periapical granulomas was 0.5 : 1, that of periapical abscesses was 1 : 1. 5.The most commonly involved location of the periapical lesions was maxillary anterior teeth(40.8%), and followed by mandibular molars, mandibular premolars, and mandibular anterior teeth and maxillary molars. The most frequent location of the periapical cysts was maxillary anterior teeth(48.9%), that of periapical granulomas was mandibular molars(50.0%), that of periapical abscesses was mandibular molars(40.0%).

사망진단서(사체검안서) 상의 선행사인으로부터 사망통계의 원사인이 선정되는 비율 : 3개 대학병원에서 교부된 사망진단서를 중심으로

박우성,박석건,정철원,김우철,탁우택,김부연,서순원,김광환,서진숙,부유경 한국의료QA학회 2004 한국의료질향상학회지 Vol.11 No.1

Background : To exatnine the problems intolved in writing practice of death certificates, we cotnpated the determination of underlying cause of death for wital statistics using recorded underlying cause of death in issued death statistics. Methods : We collected 688 rnortality certificates issue in year of 2,000 from 3 university hospitals. And we also collected vital statistics from ministry of statistics. The causes of death were coded by experienced medical record wpecialists. And causes of death determined at ministry of statistics for national vita statistics were mapped to causes of death recorded at each death certificates. The rate that underlying causes of death for vital statistics were derived from underlying causes of death recorded at issued death certificaties sere analysed. Results : 64.5% of underlying cause of death for could be derived from underlying cause of death recorded at issued death certificates, 8.6% derived from intermediate cause of death, and 3.9% derived from direct cause of death. In 23% of cases, underlying cause of death could not be derived using issued death certificates. The rate that underlying cause of death for vital statistics could be derived from underlying cause of death recorded at death certificates was different between 3 university hospitals. Ane the rate was also different between death certificates and postmortem certificates. We classified the causes of death using 21 major categories. The rate was different between diseases or conditions tha caused death too. Conclusion : When we examined the correctness of death certificate writing practice using abpve methods, cortectness of writing could not be told as satisfactory. There was difference in correctness of writing between hospotals, between death certificates and postmortem certificates, and between diseases and conditions that caused death. With this results, we suggested some strategy to improve the correctness of death certificate writing practice.

비완압형 어태치먼트의 위치에 따른 하악 가철성 국소위치의 지지조직에서의 저작압 분산 양태에 관한 3차원 유한요소적 연구

안원준,우순섭,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

The purpose of this study was to evaluate the stress patterns developed in supporting structures by removable partial denture with an extracoronal and an intracoronal rigid attachment. The mandibular removable partial dentures with Mini S-G (extracoronal) and C-M Box (intracoronal) attachment were constructed. Under 100N, 200N of vertical and 25N, 50N of lateral loads at the 1st and 2nd lower molar, stress distribution patterns and displacement were analyzed with three dimensional finite element method. The result were as follows: 1. There was no apparent difference in the patterns of stress distribution between rigid extracoronal and rigid intracironal attachments. 2. In case of the single abutment tooth with the rigid intracoronal attachment, it was not proper to preserve the abutment tooth. 3. With splinted abutments, the stress was distributed through all the root surface of both abutments. With single abutment, the stress was concentrated on the distal root surface of abutment. 4. With splinted abutments, there was not clear difference in the patterns of stress distribution with or without lingual bracing part. 5. In case of the single abutment tooth with the rigid intracoronal attachment and cantilever. More stress was concentrated around the abutment tooth with the lingual bracing part under loaded concentrated force and the abutment tooth without the lingual bracing part under loaded distributed force. 6. In case of the splinted abutments with the rigid extracoronal and intracoronal attachment, the denture base was displaced posteriorly and inferiorly when the force was applied. 7. In case of the single abutment tooth with the rigid intracoronal attachment, there was little displacement at the denture base.

정밀어태치먼트의 완압정도에 따른 하악국소의치의 지지조직에 대한 3차원 유한요소 응력분석

정연진,우순섭,이영수,심광섭,유광희 한양대학교 의과대학 1999 한양의대 학술지 Vol.19 No.1

The purpose of this study was to evaluate the stress distribution developed in the supporting structures by mandibular distal extension removable partial dentures with 4 different precision attachments. The examined precision attachments were Mini SG attachment, CM box attachment. Mini Dalbo attachment, Technoroach attachment. Concentrated force(vertical force 200N, horizontal force 50N) was applied on the artificial 2nd molar of the removable partial dentures and distributed force(vertical force 100N, horizontal force 25N) was applied on the each artificial 1st, 2nd molars of removable partial dentures. Total 4 cases were compared and analyzed with 3-dimensional finite element method. And then, stress distribution patterns were analyzed and compared. The results were as follows. 1. In case of concentrated force; Maximal stress distribution was showed on the alveolus under artificial 2nd molar and then, stress mainly distributed on the residual alveolus of the denture base. 2. In case of distributed force; Maximal stress distribution was showed on the distal alveolar crest of distal abutment, and then, stress mainly distributed on the alveolus of mesial and distal abutments. 3. The stress of residual alveolus of non rigid attachment was greater than that of rigid attachment. 4. The stress of abutments of rigid attachment was greater than that of non rigid attachment.

3개 대학병원의 주 진단 코딩사례 평가

서순원,김광환,부유경,서진숙,서정돈,윤석준,이영성,이무식,정희웅 한국의료QA학회 2002 한국의료질향상학회지 Vol.9 No.1

Background : Coding of principal diagnosis is essential component for producing reliable health statistics. We performed this study to evaluate the current practice of principal diagnoses determination and coding, and to give some basic data to improve coding of principal diagnosis. Method : Nineteen medical record administrators(MRAs) of 3 university hospitals participated in coding principal Dx. From August 1, 2001 to August 31, 2001. From each hospital, 10 medical records of patients with high frequency disease were selected randomly. Each 10 medical records were grouped into three(A,B,C). Then, these 30 medical records were given to each MRAs for coding. At the same time questionnaire was given to each of them. Questions were to prove how they decide and code the principal diagnosis among many current diagnoses ; how they decide and code the principal diagnosis when day see irrelevant diagnosis recorded as the principal diagnosis in medical record, when only tentative diagnoses were recorded without final diagnosis, and when different diagnoses were recorded in different sheets of same record. Agreement of coding among 3 hospitals were compared and survey results were analysed with SAS 6.12. Results : Agreement of coding was found in medical records 5-6 of each 10 medical records. Causes of disagreement were as follows. Difference of clinician’s opinion from each hospital; mixed use of guideline from KCD-3 and guideline from DRG; difference in 4th digit classification according to the absence of pathology report in the medical record; difference of abbreviations among hospitals. 57.9% of decided principal diagnosis after consulting to KCD-3 guideline. When there were difficulties in determining the principal diagnosis, 42.1% of MRAs decided principal diagnosis after discussion with the physician, 26.3% after discussion with fellow MRAs. Conclusion : There were differences in coding among hospitals. To minimize the difference, we suggest the development of disease-specific guidelines for coding in addition to the current general guideline such as KCD-3. To do this, Coding Clinic which can produce guidelines is needed.

철근 콘크리트 구조물의 거푸집 존치기간 단축에 따른 경제성 평가

김철,오성진,유석형,이광수,신성우 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

By means of increasing specified strength of concrete, the setting period of slab form can be reduced. When the form of slab is set, construction stage can be classified as follows; the allowable period of upper story work and the setting period of form and support of slab. Six full size scaled specimens with variables such as concrete strength and loading time are fabricated. Structural behavior and serviceability is examined at each construction stage. Test results show that the form of slab can be removed 2 days early without any damage of serviceability in case of increasing of concrete strength. This results were applied to a 15 story RC apartment, which were accomplished construction sequence analysis. As a results, the models are satisfied with structural safety, serviceability. Decrement of indirect cost showed greatly more relatively than increment of direct cost as result that achieve construction cost analysis of in case shortened 30 day's term of work at removal of forms early stage by concrete intensity promotion.