수직적 안모형태와 치아성숙도의 상관관계에 대한 연구

구용한,현홍근,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2010 大韓小兒齒科學會誌 Vol.37 No.1

본 연구는 수직적 안모형태와 치아성숙도의 관계를 평가하고 이러한 연관성에 대한 사춘기 성장의 영향을 평가하기 위한 것이다. 이번 연구를 위해 7세에서 9세, 13세에서 15세 환자 1306명을 Ricketts의 VERT index를 이용하여 수직적 안모 형태를 분류하였고 환자들의 치령을 Demirjian법으로 평가하여 다음과 같은 결과를 얻었다. 1. 모든 군에서 치령이 역령과 비교 시 통계적으로 유의한 수준에서 크게 측정되었다. 2. 사춘기 연령군에서 brachyfacial type의 경우가 dolichofacial type 보다 치아성숙도가 크게 나타나는 경향을 보였다. 여성의 경우는 통계적으로 유의성있게 차이가 나타났으며, 남성의 경우는 통계적 유의성은 보이지 않았다. 3. Brachyfacial type의 경우 사춘기전 군들과 비교 시 사춘기 군들에서 치아성숙도가 유의성있게 높게 나타났으며, dolichofacial type의 경우는 연령층간 치아성숙도의 차이를 보이지 않았다. The purpose of this investigation was to study the relationship between vertical facial pattern and dental maturation in children in pubertal and pre-pubertal periods. The material consisted of lateral head films and panoramic radiographs of 1306 patients. The subjects were selected according to Ricketts's VERT index and other including criteria. These subjects were divided by VERT index to brachyfacial group and dolichofacial group. In each selected subject, dental age was determined according to Demirjian's dental maturity score. All subjects were distributed according to age, vertical facial type and sex, mean and standard deviation of chronological age, dental age and age difference were determined in each group. And the data were analysed to find the difference of tooth maturation by facial pattern. Findings of this study include: 1. In all groups, dental age was determined higher than chronological age in statistically significant level. 2. Compared by vertical facial pattern, in pubertal age groups, it seems that subjects with brachyfacial type presented the tendency to have an advanced dental maturation, only in female group. 3. Compared by pubertal period, brachyfacial groups presented more advanced dental maturation in pubertal groups than pre-pubertal groups.

유한요소법을 이용한 유도전동기 d-q 모델의 회로정수 해석

구태만,최종선 울산대학교 2000 공학연구논문집 Vol.31 No.1

본 논문에서는 3상 유도전동기의 d-q등가모델의 회로정수를 구하는 한 방법을 제시하였다. 자기해석은 철심과 슬롯 형상을 정확하게 반영할 수 있는 유한 요소법을 이용하였고, 철심의 자기포화현상도 고려하였다. 제시된 방법은 반복계산을 통하여 회로정수를 구하는 방법에 비해 계산시간을 절약할 수 있다. 그리고 산출된 각 회로정수는 전류의 변화에 따라 다른 값을 가짐을 확인할 수 있었다. This paper presents a method for determining of the equivalent d-q model parameters of three-phase squirrel cage induction motors. The method is based on the use of a finite-element field calculation which enables the precise slot geometry to be modelled accurately, and includes the effects of magnetic saturation of iron core. The proposed mothod can reduce computational costs compared with the method that needs the iterative field analysis to obtain the parameters. It is verified that the circuit parameters are shown as functions of the current.

서울대학교치과병원 소아치과를 내원한 교정환자의 분포양상에 대한 연구

구용한,현홍근,김정욱,장기택,이상훈,한세현,김종철 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.4

과거에 비해 소아 및 청소년기에 교정치료를 시작하는 경우가 증가하고 있으며 따라서 소아치과에서 교정치료가 차지하는 비율 역시 증가하는 추세이다. 이러한 변화에 맞추어 소아치과에 내원하는 교정환자의 분포 양상을 파악하기 위하여 본 연구를 시행하였다. 2006년 1월부터 2008년 12월까지 서울대학교 치과병원 소아치과를 내원한 환자 중 교정 진단 받은 792명을 대상으로 조사를 진행하였으며 다음과 같은 결과를 얻었다. 1. 교정 진단을 받은 환자의 연령 분포는 8세가 22%로 가장 많았고 7세(19%), 9세(16%) 순서로 나타났다. 2. 골격 분포는 골격성 1급 부정교합이 52%로 가장 많았고 3급(29%), 2급(19%)순서로 나타났으며 연령이 낮은 경우 3급 부정교합 환자의 비율이 높은 경향을 보였다. 3. 총 792명의 환자 중 28%인 218명에서 전치부 반대교합을 보였으며 연령이 낮은 경우 그 비율이 높은 경향을 보였다. Distribution of orthodontic patients in pediatric dental clinics has increased recently. So it is worth to study about the present status of orthodontic patients in pediatric dental clinics. The purpose of this study was to recognize the characteristics and orthodontic patterns of orthodontic patients in pediatric dental clinics. The material consisted of distribution and orthodontic analysis records of 792 new patients in the department of pediatric dentistry, Seoul National University Dental Hospital, from 2006 to 2008. Results were as follows 1. In age distribution, 8-year-olds group comprised 22%, 7-year-olds 19%, 9-year-olds 16%, 10-year olds 15%, 11-year-olds 11%, and other age groups comprised 18%. 2. In skeletal patterns, skeletal class Ⅰ patients comprised 52%, class Ⅱ 29%, and class Ⅲ 19%. 3. In vertical facial types mesofacial comprised 41%, brachyfacial 35%, and dolichofacial 24%. 4. Out of 792 patients 218 patients(28%) showed anterior cross-bite, and the occurrence ratio of anterior cross-bite increased as the age decreased.

가토에 있어서 편측 요관 폐색시 환측, 반대측 요관에 대한 변화 : 조직학적 소견을 중심으로

설종구,김용웅,육승모,노안식,김홍식,김상현,이충식 충남대학교 의과대학 의학연구소 2003 충남의대잡지 Vol.30 No.1

This study was designed to clarify histological changes in the experimental rabbit ureter after unilateral prartial or complete ureteral obstruction. A total of 20 adult white rabbits were divided into 4 subgroups in the partial obstruction followed by 2 weeks, partial obstruction followed by 4 weeks, complete obstruction followed by 2 weeks, complete obstruction followed by 4 weeks. The normal control group consisted of 5 adult white rabbits. The H & E stain. light microscopy were used. Abnormal histological fingings were showed in ipsilateral ureter of all subgroups; dilatation of ureter, epithelial cell atrophy or loss, interstitial fibrosis, interstitial inflammation. These findings were most severe in the complete-obstructed ureter for 4 weeks. There were no significant changes in contralateral ureter of all subgroups. Despite of progressive histological changes in ipsilateral ureter no abnormal findings were showed in contralateral ureter. We suggest that long term experimental investigation for histological changes in ipsilateral ureter and compensatory changes in contralateral ureter should be done.

경남지역 고등학교 학생의 직접 교육비와 간접 교육비 분석

최청일,천구태 東亞大學校 學生生活硏究所 1994 學生硏究 Vol.22 No.-

The aim of this paper compares both the public and private costs of academic and vdcational upper secondary school students. We also compare both the public and private costs among vocational upper secondary school students : commercial, agricultural, technical, aquatic. The sample of students used in the study were selected from academic and vocational upper secondary school. Two types of data were requried to carry out this study; data on public cost and data on private cost. Data on public cost were collected from Educational Board in Kyung-nam. To acquire data on private cost the questionaire was administered to 1800 students. The findings divided by public and private cost per student are as follows. 1. Government-borne public costs were higher for vocational educational students relative to academic educational students. Among vocational students fishery school students were the highest. 2. Educational costs which are publicly borne by students and parents were for higher academic students relative to vocational students because fees and tuitions were high. 3. Academic students paid direct private costs much more than vocational students,but we must keep an eye on commercial students paying direct private costs much more than academic students. 4. Total educational costs per student, which consist of government-borne costs,tuitions and fees, direct private costs, were higher for academic students relative to vocational students. Among vocational students commercial students were higher for other vocational students. 5. When comparing total educational costs per student with students'social-economic status. There was little difference. 6. Indirect private costs were higher for academic students relative to vocational students. Among vocational students. Among vocational students indirect cost of fishery students students. were lower in contrast to other vocational students. 7. Parents' occupation and family income were little related with private costs. But parents' educationwas related with private cost. In sum, the analysis to cover total education costs has shown that the more expensive educational program is the academic one-Govemment-borne public cost was only higher for vocational education than that of academic education, whereas private and indirect costs were higher for academic students. In monetary outlay academic students paid 280,000won in average more than vocational students peryear. Among vocational students the order which was much paid direct costs was commercial, agricultural, technical, aquatic. In terms of indirect cost academic students paid 31687won more than vocational students per day. But except for aquatic students there was little difference in indirect cost.

고환절제 후 백서의 복측 전립선에서의 병리학적 변화에 관한 연구

설종구,윤율로,이중화 충남대학교 의과대학 지역사회의학연구소 1994 충남의대잡지 Vol.21 No.2

The regulation of cell death and renewal is controlled by androgen in rat ventral prostate. So many studies on androgen block effects has been performed to understand the hormonal control in prostatic epithelial cell. Castration of rat results in activation of programmed cell death of ventral prostate. This response is related to activation of the calcium-magnesium dependent endonuclease. To observe the changes of regression of prostatic gland following androgen withdrawal, histologic examination was performed in rat ventral prostate after castration. The level of serum testosterone was rapidly decreased after castration from 5.9 ng/ml in normal rat to 1.6 ng/ml at 3hr castration. After 6hr postcastration its level was 0.01 ng/ml or below. The pathologic changes of ventral prostate was also observed after castration. Apoptosis in the ventral prostate appeared initially at 24hr postcastration but maximal apoptosis was noted at 6days. We confirmed the apoptotic bodies in light microscopic examination be electron microscopic observation.

일본의 고령화와 노동문제

이종구 서울대학교 국제지역원 1995 국제지역연구 Vol.4 No.2

이 논문에서는 고령화가 일본의 노사관계에 미치는 영향을 기업, 정부, 지방자치체의 대책을 중심으로 살펴보았다. 기업의 수준에서는 연공적 질서가 능력주의적 질서로 대체되어가는 셩향이 확인되고 있었다. 그러나 종업원의 충성을 확보하기 위하여 사내 복리후생의 측면에서는 퇴직자에 대한 의료보험의 적용, 기업연금제도와 같이 전생애에 걸친 기업의 서비스가 강조되고 있었다. 1986년부터 시행된 '高年齡者雇用安定法'에 의해 정부와 지방자치체는 기업이 정년을 60세까지 연장하고 65세까지 '계속고용'을 실시할 수 있도록 유도하는 행정지도 및 유인제공에 중점을 두고 있었다. 공적 연금의 수급연령을 단계적으로 현행 60세에서 65세로 높이는 방향으로 1994년에 연금제도가 개혁되었다. 여기에는 취로기회의 제공을 고령자 대책의 중점으로 간주하는 정책적 구상이 있다. 따라서 재취직을 촉진하가 위한 직업안정서비스와 직업훈련에 대한 지원이 강조되고 있다 그러나 기업의 종업원에서 주민으로 돌아 온 고령자가 생활하는 지역사회 수준의 대책을 정비하기 위해 시민과 각계 유관단체가 협력적 관계를 형성할 필요가 있다. 총체적으로 말해 현재는 '생산성'에서 '생활의 질'로 사회적 우선 순위의 전환이 필요한 시점이라고 할 수 있다. This paper has analyzed the impact of aging on the industrial relations in Japan. The focus of the analysis has been laid upon the responses and policy measures of the enterprises, central and local government. In the enterprises, the Japanese style seniority(nenko) system has been substituted by the merit system emphasizing ability and performance of the individual. But they have begun to extend the beneficiaries of the enterprise welfare system for the purpose of securing loyalty. Retired employees can be covered by the enterprise medical insurance service. They also try to introduce enterprise pension system. According to the emplyment security law for the aged persons enforced since 1986, central and local government have provided the guidances and incentives for the enterprises, so as to extend the retirement age unto 65, from the age limit of 60 at present. Linked with this, public pension system has been changed in 1994, so that the beginning age of receipt should be extended gradually unto 65, from that of 60 at that time. In short, Japanese policy makers emphasize the retraining and job security for the aged. The conditions and environments of community should be rearranged by the common efforts private and public sectors, so as to accommodate the age returned from the life world of enterprise. In sum, they are facing the turning point of substituting 'quality of life' for the 'pursuit of productivity', as a social goal of priority.

尿路結石의 化學的 成分 分析

薛鍾求 충남대학교 의과대학 지역사회의학연구소 1979 충남의대잡지 Vol.6 No.2

A clinical study was made on 103 cases of urinary calculi among the number of 464 inpatients during 2 years and 8 months from January 1977 to August 1979, and chemical analysis was performed on 80 cases of urinary calculi which were collected. The results were as followings ; 1. The incidence of urinary calculi was 22.2% in inpatients, and male to female ratio was approximately 1.9 : 1, and 81.6% of the patients of urinary calculi were distributed in 20 to 49 years old. 2. The location of urinary calculi were ureter 53.4%, kidney 30.1%, bladder 13.6% and urethra 2.9%, and upper urinary tract calculi was 83.5% and lower urinary tract calculi was 16.5%. The most common size was 1.0-2.9cm(68.8%), and below 0.9cm and above 6.0cm in its diameter were 5% respectively. 3. The results of chemical analysis of 80 urinary calculi revealed oxalate salt in 72.5%, phosphate salt in 70.0%, and single composition was 22.5%. Among the upper urinary tract calculi, oxalate salt were 60.0% and phosphate salt were 51.3%, but in lower urinary tract, especially in bladder stores, ammonium salt were 83.3%. 4. The calculi which composed with ammonium salt were closely related with infection than other composed calculi.

陳舊한 急性腦炎(日本型?)의 一部檢症例

全鍾暉,李濟九,李聖洙,池堤根 醫藥係社 1961 綜合 醫學 Vol.6 No.10

九州의「지역 생활조직」

이종구 서울대학교 국제지역원 1993 국제지역연구 Vol.2 No.3

九州(큐슈)의 도시에 있는 「지역생활조직」에 대한 조사를 통해 고도성장에 따른 급속한 사회이동 과정에서 해체되어 온 거주공간을 단위로하는 「공동성」의 복원이 사회적 과제로 등장하고 있는 모습이 관찰되었다. 소학교구를 단위로하여 조직된 지역발전을 위한 「협의회」가 수행하는 각종 주민조직의 통합 기능이 부각되고 있다. 이는 지연의 통합효과가 감소함에 따라 생활과정에서 새로운 공동서의 기반이 모색될 필요가 있기 때문이다. 「공동성」의 내용 가운데는 거주 지역 단위의 이익을 넘어서는 새로운 보편성이 포함되어 있는 모습에 주목할 필요가 있다.즉 「복지」와 「환경」이라는 키워드에는 지역사회를 포괄하고 있는 상위의 사회적 단위인자치체·국가의 생존과도 밀접한 관계를 가지고 있다. 이러한 사회적 가치의 추구는 자치체 수준의 의사결정과 밀접하게 결부되어 있다. 내부적으로는 국제화 외부적으로는 지역경제통합이 부각되는 가운데 지방의 주체성이 강조되는 방향으로 사회의 재조직화가 진행되는 현상에 주목할 필요가 있다. This field research has been organized forthe purpose of providing first-hand information about the urban neighborhood associations of kyushu region in Japan. The role of neighborhood association as an agent of social integration has been remained effective despite of the rapid social mobility and the apathy of the young generation towardlocal community. At primary school district level, community leaders emphasized the need oforganizing welfare system based in mutual help and and voluntary garbage dispose system. In fact, these functional requirements cannot be met without the cooperation of the neighborhood association. The community center established at the primary school district level has provided the recurrent education programme and the place for the activities of the various organizations including neighborhood association. The local authorities have supported the community center expecting the effect of social integration based on the sense of community. In these efforts, we can see the trend toward the reorganization of social relations and the redefinition of the autonomous local identity. But this emphasis upon the of the local identity can be interpreted as the other side of the globalization, which has been the social consensus in Japan since the 1980s.