하악골 실험병소에 관한 방사선학적 연구

이영호,안형규,Lee Young-Ho,Ahn Hyung-Kyu 대한영상치의학회 1987 Imaging Science in Dentistry Vol.17 No.1

The purpose of this study was three-fold: to reexamine whether periapical and central lesions can be detected on the radiograph when they are in the cancellous bone, to investigate regianal differences in radiograph visualization of the lesion, and to. compare the interpretation of radiagraphs by densitometric analysis with the visual interpretation af the same radiographs. Forty-nine apical lesions and eighty-two central lesions were made in 8 mandibles and radiographed serially while being enlarged and deepened. All radiagraphs were evaluated by three dental radiologists. Each lesion was scored of 3 to 0, based on the radiographic appearances. Special radiographs of 15 apical and central lesions were analysed by densitometer and the results were compared with the scores which were previously assigned by three examiners. From this study the following conclusians could be drawn; 1. Experimental lesions confined to cancellous bone were detected an the radiagraphs in 41.3% of the cases. 2. Visualization of periapical lesions in cancellous bone was more apparent than that of central lesions in cancellous bone. 3. Visualization of the periapical lesions confined to. cancellous bane was highest in molar teeth, and detection of the central lesions in alveolar portion was easier than those in lower portion of mandibular body area. 4. It was possible to detect the experimental lesions without cortical plate involvement in 78.6% of the all lesions. 5. Densitometric analysis of radiographs could reproducibly distinguish bone changes, especially of central lesions in cancellous bone.

유닛모듈러 건축물의 설계 초기 단계에서의 고려 사항

이영호,이두헌,김균태,Lee, Young-Ho,Lee, Du-Heon,Kim, Kyoon-Tai 한국건설관리학회 2012 한국건설관리학회 논문집 Vol.13 No.6

최근 저탄소 녹색성장 등 건설 환경의 변화에 따라 친환경적이고 시공 효율성을 극대화할 수 있는 유닛모듈러 공법 등과 같은 새로운 건축시스템에 대한 요구가 증대되고 있다. 유닛모듈러 공법은 전체 공정의 80%이상을 공장에서 제작하고 현장에서는 유닛모듈 조립과 마감작업 위주로 작업이 진행되므로 설계 및 공장 제작 등 현장시공 이전 단계의 품질이 건축물 전체의 품질을 좌우하는 특성을 가진다. 국내 유닛모듈러 공법은 2003년 학교 건축물의 적용을 시작으로 점차 확대되고 있지만, 적용 사례와 관련 자료의 부족, 모듈러 생산업체의 영세성 등으로 유닛모듈러 공법의 특성을 충분히 반영한 설계, 공장제작 및 현장시공은 아직 이루어지지 못하고 있는 실정이다. 본 연구는 국내 유닛모듈러 건축물의 설계품질 향상의 일환으로 공장제작 및 현장시공 단계에서의 문제점을 도출하고, 그 원인을 비교 분석함으로써 유닛모듈러 건축물의 설계 초기 단계에서 고려해야 할 주요 검토 항목을 제시하였다. With the recent changes in building environments such as low-carbon green growth, there have been increasing demands for the new building system that is eco-friendly and can maximize efficiency such as the unit modular system. For the unit modular system, more than 80% of the whole process is carried out in the factory while in the field, mostly unit module assembling and finish work are done. Thus, the quality at the pre-construction stage when design and manufacturing are done determines the quality of the building as a whole. In the country, the unit modular method was first applied in 2003 to school buildings and has gradually expanded afterwards, but due to the lack of examples and related information as well as the small scale of modular manufacturers, its characteristics have not been sufficiently reflected in design, manufacturing and field constructions. This study, as an attempt to improve the design quality of unit modular buildings, points to the problem in manufacturing and field construction, compares and analyzes its causes, and suggests major points to be considered in the early stage of designing the unit modular buildings.

긴장재를 사용하지 않은 프리캐스트 교각의 내진성능 실험 연구

이영호,송재준,Lee,Young Ho,Song,Jae Joon 한국방재학회 2012 한국방재학회논문집 Vol.12 No.6

본 논문은 PC 텐던 등에 의한 긴장력을 도입하지 않고 일반 철근만을 사용한 프리캐스트 교각의 내진성능을 검증하기 위하여 프리캐스트 교각의 실물모형 내진성능 실험을 실시하였다. 프리캐스트 블록은 축방향 철근 3개를 하나의 홀로 삽입되도록 하여 시공성을 향상시켰다. 프리캐스트 유무와 FRP보강 유무를 실험변수로 하여, 동일한 형상의 3개의 실험체에 대하여 실험을 실시하였고, 파괴형상, 반복 횡하중에 대한 연성능력을 평가하고 각 시험체의 강성저하에 따른 감쇠비, 강성 저감과 소산에너지 등을 비교하였다. 실험결과, 프리캐스트 교각의 시공성과 내진성 및 FRP 보강에 의한 내진성능 향상을 확인할 수 있었다. In this study, the tests of seismic performance for full-scale models of the precast pier were conducted in order to verify the seismic performance of the precast pier using general rebar without introducing prestressing force such as a PC tendon. The constructability of the precast blocks was improved by inserting three rebars on an axis direction into a one hole. The tests for three piers with identical form were carried out, with use of precast and FRP reinforcement as test variables. The ductility for failed shape and cyclic transverse loads was evaluated. The damping ratio, stiffness reduction, and energy dissipation according to reducing stiffness were compared. These tests proved improvement of constructability and seismic performance for precast pier and of seismic performance for FRP reinforcement in their results.

회원마당 - 20만평 일군 영농기술자

이영호,Lee, Yeong-Ho 전국농업기술자협회 2009 농업기술회보 Vol.46 No.4

증강현실 기술을 이용한 eBook 콘텐츠 기술동향

이영호,최종명,Lee, Yeong-Ho,Choe, Jong-Myeong 한국스마트미디어학회 2013 It's Smart Media Vol.2 No.2

무수축 모르타르 충진형 슬리브 개발

이영호,송재준,조재영,김도학,Lee. Young-Ho,Song. Jae-Joon,Cho. Jae-Young,Kim. Do-Hak 한국방재학회 2011 한국방재학회논문집 Vol.11 No.2

본 연구의 목적은 공기 단축과 초기 공사비를 절감하기 위해 PC 긴장재를 사용하지 않고, 슬리브와 일반 철근만으로 구성된 경제적이면서 시공성이 우수한 프리캐스트 교각 공법 개발에 있다. 이를 위해 본 연구에서는 신형식 철근이음 장치인 그라우팅형(形) 슬리브(Splice sleeve, 이하 슬리브)를 제안하고 최적의 슬리브를 개발하기 위하여 슬리브 길이, 철근직경, 양생방법 등을 변수로 하여 유한요소해석 및 인장실험을 수행하였다. 슬리브의 유한요소해석을 통하여 최적의 형상을 도출하였으며, 인장 성능 검토 결과, 철근의 인발에 의한 파괴는 발생하지 않았으며, 철근의 인장 파괴 혹은 슬리브의 기계적 결함에 의한 볼트 파단만이 관찰되었다. 제안된 슬리브는 우수한 인장성능을 갖고 있음을 확인하였으며 프리캐스트 교각에 무리 없이 적용할 수 있음을 검증하였다. This study aims to develop an economical precast hollow concrete column with high constructability which consists of only splice sleeve and general reinforcing bar without using PC tendons in order to reduce the construction period and cost. With this purpose, this study performed the finite element analysis and tension test by using some variables such as length of sleeve, diameter of rebar and curing method for suggesting a grouting type splice sleeve which is a new type joint rebar and developing an optimized splice sleeve. As a result, the analysis on the tension performance of splice sleeve did not show any destruction caused by pull-out in reinforcing bar but it only occurred destruction of tension bar or bolt shear rupture from the mechanical defect of sleeve. Therefore, the experiment showed high performance in tension of the suggested splice sleeve and verified the application of precast hollow concrete column.

RFM 모델 기반의 병원고객 세분화 전략

이영호,강운구,황희정,Lee, Young-Ho,Kang, Un-Gu,Hwang, Hee-Jung 한국정보과학회 2005 정보과학회논문지 : 기술교육 Vol.2 No.1

의료시장개방등 보건의료 환경의 변화에 대응하기 위해서 병원도 기업과 같이 병원의 경쟁력이 고객중심의 의료를 통한 고객관계관리를 도입해야 하는 시대가 도래 하였다. 이를 위해 병원 고객의 성격 및 정확한 분류를 통해 좀더 체계적인 고객관리 방법이 요구되고 있다. 본 논문에서는 인천에 위치한 1300병상 이상의 종합병원고객을 대상으로 데이타 구간화를 적용한 RFM(Recency Frequency Monetary)모델을 도입하여 고객등급화를 수행하고, 데이타마이닝 사후분석를 실시하여 효율적인 고객관리 방법을 찾아본다. In order to cooperate today's healthcare environmental changes such as healthcare market opening and increase their competitiveness, Hospitals should perform customer based medical service and bring Customer Relationship Management to their system like other industries and enterprises. Therefore they need to reorganize customer management by analysis and classification of customers. This paper will suggest effective customer management strategies by the performing customer segmentation through RFM model which is applied by data tinning and analysis of data mining. Its study sample is from the general hospital with more than 1300beds in Incheon.

신체화의 생물학적 기전 : 신체화의 신경심리학적 모델을 중심으로

이영호,Lee, Young-Ho 한국정신신체의학회 2000 정신신체의학 Vol.8 No.1

Somatization disorder is a chronic condition characterized by multiple somatic complaints that are not due to any apparent organic illness. Somatization disorder is related historically to hysteria and hysteria has been defined by the existence of somatic complaints for which no organic reason can be found. Therefore most theories of somatization have focused on the psychodynamic and sociological perspectives. However, the concept that the somatic presentation of emotional distress or psychiatric illness might have a neurobiological basis has also aroused considerable interest. Relative to this perspective, the case of Anna O. which has been considered the prototype of hysteria, was reformulated from a neuropsychological perspective. Several neurophysiological and neuropsychological studies, studies concerning hemispheric differences in symptom presentation of the patients with hysteria have been shown the evidences for the biological basis of somatization. Moreover, recent neuroimaging studies in somatization disorder also show that brain dysfunction in somatization. The author reviewed several candidate theories which could help to explain the process of somatization in the perspective of biological basis and proposed the new neuropsychological model of somatization. The author also examined the possible application of this model to the treatment of somatization disorder and discussed it's limitation and the future directions in this field. 신체화 장애란 명백한 기질적 병리가 없이 다양한 신체 증상을 호소하는 만성 장애를 말한다. 그런데 신체화 장애는 역사적으로 기질적인 이상이 없이 신체적인 증상이 나타나는 히스테리와 연관이 있다고 알려져 왔다. 따라서 신체화와 관련된 대부분의 이론들은 주로 정신역동이나 사회적인 관점에 초점이 맞추어져 왔다. 그러나 감정적인 문제나 정신질환이 신체화로 나타나는 기전에서 신경생물학적인 관점에 대한 관심 또한 적지 않았었다. 이런 신경생물학적인 관점에서 히스테리아의 원형으로 알려져 있는 Anna O 증례조차도 신경심리학적인 관점에서 재조명되기도 하였다. 몇몇 신경생리학적 및 신경심리학적 연구결과들, 히스테리 환자에서 신체화증상 표현의 좌우 반구차이에 대한 연구결과들이 신체화의 생물학적 근거를 뒷받침해 주고 있다. 최근 들어 신체화 장애의 신경영상검사는 신체화 장애에서 뇌의 기능 이상이 존재함을 보여 주고 있다. 이에 저자는 생물학적 관점에서 신체화의 과정을 설명해 줄 수 있는 몇몇 가설들을 고찰하고 이를 바탕으로 신체화에 대한 새로운 신경심리학적 가설을 제시하고자 한다. 이와 함께 이 가설을 신체화 장애의 치료에 어떻게 적용시킬 수 있을까도 논의하고 이 가설의 제한정과 이 영역에 있어 앞으로의 발전 방향에 대해서도 논의하려고 한다.

심인성 소양증환자와 만성 담마진환자의 스트레스지각과 통제소재 및 우울증상과의 관계

이영호,고대관,한기석,정영조,김용상,임성춘,남기흠,김중호,Lee, Young-Ho,Ko, Dae-Kwan,Han, Ki-Seok,Chung, Young-Cho,Kim, Yong-Sang,Lim, Sung-Chun,Nam, Ki-Heum,Kim, Chung-Ho 한국정신신체의학회 1995 정신신체의학 Vol.3 No.2

For investigating a disease specific psychological mechanism in various dermatological disorders, we tried to explore the difference in correlation among stress perception, locus of control as a coping strategy, depressive symptoms and pruritic symptoms in the patients with psychological pruritis and chronic urticaria. The subjects were composed of 32 patients with psychol-ogical pruritis and 67 patients with chronic urticaria(subject group), and 25 patients with organic pruritis and 59 patient with major depression(control group). Global assesment of recent stress scale(GARS), I-E locus of control scale, Beck Depression Inventory(BDI) and medical college of wisconsin center pain follow up questionnaire were used for assesement. The results were as follows: 1) There were a significant positive correlation between stress perception and depressive symptom in patients with psychological pruritis, chronic urticaria, and major depression but not hi organic pruritis. 2) In relationship between locus of control and depressive symptom, patients with psychological pruritis, organic pruritis, and major depression except chronic ruticaria showed a significant negative correlation. 3) For intensity and pattern of pruritis, there were positive relations with depressive symptom and stress perception only in patients with chronic urticaria. Above results indicate that stress perception and locus of contorl may play a significant role in the formation of psychological and dermatological symptoms in psychological pruitis and chronic urticaria. But the mechanisms of these processes are different in either disorder.

식사 행동의 신경학 : 섭취에 중점을 맞추어서

이영호,Lee, Young Ho 대한생물정신의학회 1998 생물정신의학 Vol.5 No.2

In mordern society, nutritional and appetite disorders occur in epidemic proportions and are serious health harzards. Obesity and diabetes affect over 30% of American population, while eating disorders, such as anorexia nervosa and bulimia nervosa occur in a growing number of adolescences and young adults. The changes in various sociocultural aspects with the introduction of Westernized culture have had the effect of increasing the risk of same problems in Korea. Disorderd eating patterns are a primary symptom of numerous psychiatric disorders and loss of appetite and cachexia, during illness or in the elderly, preclude proper medical treatment for restoring good health or preserving life. Increased understanding of the systems of the body and brain, related to energy and nutrient balance, may help us to treatment and ultimately prevent these commom disorders. In this review, the author highlights the psychobiological mechanisms or factors which are associated with eating behavior, especially in the view of intake psychobiology. This review would be concentrated on 1) the theoretical concepts and theories of eating behavior ; 2) the psychobiological determinants of food intake ; and 3) the psychobiological control of eating behavior.