頭蓋內 血管疾患으로 因한 頭痛

韓允善 中央醫學社 1972 中央醫學 Vol.23 No.5

Empty Sella Syndrome

韓允善,鄭헌和,李憲宰 최신의학사 1972 最新醫學 Vol.15 No.12

Empty Sella Syndrome, first described by Busch in 1951 in cases which the pituitary formed only a thin layer of tissue at the bottom of a sella, is a poorly defined term. Deterioration in visual function after pituitary surgery is usually assumed to indicate recurrence. of tumor. However no tumor is found when enlarged sella is explored surgically on rare occasions. The cause of syndrome is variable from a congenital absence of the diaphargma or widening of the .infundibular outlet, postradiation vasculitis, occlusion of small vessels, vascular strangulation to intrasellar non-neoplastic cyst. We are reporting one. case of this.syndrome encountered recently at Yonsei University Medical Center.

‘Buy-One Give-One’ 비즈니스모델의 수익 구조에 대한 수리적 분석

한윤선,서영덕 한국문화경제학회 2017 문화경제연구 Vol.20 No.1

This study proposes that the cultural corporation can be more profitable by adopting the ‘Buy-One Give-One’ Business Model (BOGO BM) under certain conditions. Specifically, the conditions are that 1) consumers’ utility for donating is high enough and 2) the production cost is low enough due to economies of scale or process innovation from employee’s intrinsic motivation. We adopt a mathematical model where the demand function is a simple linear function and two companies compete with each other by choosing their quantity of output (the Cournot model). Specifically, we investigate the profitability of the BOGO BM in four situations: 1) a monopolist enjoying reduced cost due to process innovation from employee’s intrinsic motivation, 2) a monopolist enjoying reduced cost due to economies of scale, 3) the duopoly with BOGO BM and a general company, 4) the duopoly with two BOGO BM companies. In each situation, BOGO BM can be more profitable than other general companies can under certain conditions. 본 연구는 ‘Buy-One Give-One’ 비즈니스모델이 규모의 경제가 높은 상품일수록 이윤 달성의 가능성이 높음을 밝힘으로써, 추가 소비자에 따른 한계비용이 거의 발생하지 않아 규모의 경제 효과가 매우 높은 디지털 재화, 공연 등 문화콘텐츠 산업에 ‘Buy-One Give-One’ 비즈니스모델이 수익성 향상을 위해 매우 적합함을 제안하고자 한다. 최근 문화콘텐츠 기업들이 수익성 달성의 한계를 극복하지 못하고 공공자금의 지원을 받을 수 있는 사회적기업으로의 전환을 모색하고 있는 추세로 볼 때 이 제안은 문화콘텐츠 기업에게 매우 의미가 있다. 예를 들어 신발 한 켤레를 판매할 때마다 다른 한 켤레를 개발도상국의 아이들에게 기부하는 TOMS의 ‘Buy-One Give-One’ 비즈니스모델을 수리모형으로 분석한 후 이윤 달성가능성이 높아 지속가능성 역시 높음을 밝히고 있다. 구체적으로 소비자의 기부효용과 사회적 기업의 내적동기에 의한 혁신 혹은 규모의 경제 효과를 수리모형에 반영하여, 1) 독점시장이면서 내적동기에 의한 혁신을 적용한 경우, 2) 독점시장이면서 규모의 경제를 적용한 경우, 3) 일반기업과 TOMS 두 기업으로 구성된 과점시장의 경우, 4) ‘Buy-One Give-One’ 비즈니스모델을 채택하고 있는 TOMS형 기업 2개로 구성된 과점시장의 경우를 분석한다.

소셜빅데이터 수집 및 분석을 위한 아동청소년 학교폭력 온톨로지 개발

한윤선,김하영,송주영,송태민 한국콘텐츠학회 2019 한국콘텐츠학회논문지 Vol.19 No.6

Although social big data can provide a multi-faceted perspective on school bullying experiences among children and adolescents, the complexity and variety of unstructured text presents a challenge for systematic collection and analysis of the data. Development of an ontology, which identifies key terms and their intricate relationships, is crucial for extracting key concepts and effectively collecting data. The current study elaborated on the definition of an ontology, carefully described the 7 stage development process, and applied the ontology for collecting and analyzing school bullying social big data. As a result, approximately 2,400 key terms were extracted in top-, middle-, and lower-level categories, concerning domains of participants, causes, types, location, region, and intervention. The study contributes to the literature by explaining the ontology development process and proposing a novel alternative research model that uses social big data in school bullying research. Findings from this ontology study may provide a basis for social big data research. Practical implications of this study lie in not only helping to understand the experience of school bullying participants, but also in offering a macro perspective on school bullying as a social phenomenon. 소셜빅데이터는 아동청소년의 학교폭력 현상에 대한 풍부하고 다각적 시각을 제공할 수 있지만, 복잡하고 다양한 비정형 텍스트로 구성되어 있어 자료의 체계적인 수집과 활용이 어렵다. 소셜빅데이터의 수많은 정보 가운데 의미 있는 개념을 추출하고 자료를 효과적으로 수집하기 위해서는 연구주제에 상응하는 핵심용어를 명시하고, 해당 개념 간의 관계를 나타내주는 온톨로지의 역할이 중추적이다. 본 연구는 온톨로지의 개념을 정리하고, 7단계에 걸친 온톨로지 개발 과정을 구체적으로 설명한 후, 학교폭력 소셜빅데이터 수집 및 분석을 위한 온톨로지 구축에 적용하였다. 그 결과, 학교폭력의 대상, 원인, 유형, 장소, 지역, 대응방안 6가지 영역을 중심으로 최상위 계층인 대분류를 구성하고, 중분류 및 소분류 체계를 거쳐 총 2,400여 개의 핵심용어를 도출하였다. 본 연구의 의의는 온톨로지 수집 및 개발과정을 설명하고, 기존의 연구방법과는 다소 차별을 두는 소셜빅데이터를 활용한 연구모형을 학교폭력 연구에 제시하였다는 것이다. 소셜빅데이터 분석의 기초가 되는 온톨로지 개발 연구는 좁게는 학교폭력 대상자들에 대한 이해를 제고시킬 뿐 아니라, 거시적으로는 학교폭력이라는 사회현상을 바라보는 한국사회의 시각에 대한 정보를 제공하는 실천적 함의가 있다.

AN INTRODUCTION TO RADIDFREQUENCY PERCUTANEOUS COROTOMY

한윤선,이헌재 중앙대부설한국의과학연구소 1973 한국의과학 Vol.5 No.4

Pituitary Adenoma의 Microsurgical Transsphenoidal Approach

한윤선,이헌재 대한신경외과학회 1976 Journal of Korean neurosurgical society Vol.5 No.2

3 cases of pituitary adenomas, two hormone-secreting adenomas, and one non-secreting chromophobe adenoma, were treated surgically by the sublabial transsphenoidal approach with use of surgical microscope and radiofluroscopic image intensification at the Dept. of Neurosurgery, Yonsei University, Medical College. The 2 cases of hormone secreting adenomas were an eosinophilic microadenoma manifestating gigantism and a prolactin secreting adenoma with amenorrhea and galactorrhea. The simplicity of this technique, criteria for the treatment of the hormone secreting and non-secreting aadenomas and thier biologic behaviors were described and discussed with review of literatures.

Chronicity of Maternal Depression, Child-Rearing Beliefs, and Child Problematic Behaviors at 54 months

한윤선,최진혁 인지발달중재학회 2015 인지발달중재학회지 Vol.6 No.2

Using data from the NICHD Study of Early Child Care and Youth Development, the current study examined whether more progressive versus more authoritarian maternal child-rearing beliefs moderate the association between maternal depressive symptoms across the child’s infancy and preschool years and child problem behaviors at age 4 ½. The Center for Epidemiology Scale of Depression (CES-D) was repeatedly administrated to 1364 women at their children’s ages of 1, 6, 15, 24, 36 and 54 months to examine the chronicity of clinically significant levels of maternal depressive symptoms. Maternal child-rearing beliefs were assessed with the Parental Modernity Scale (Schaefer & Edgerton, 1985). Child behavior problems were measured with the Child Behavior Checklist collected from the children’s mothers and childcare providers. More progressive (child-centered) child-rearing beliefs were found to moderate the association between chronic clinical levels of maternal depressive symptoms and caregivers’ reports of child externalizing behavior problems. Higher externalizing behavior problems were reported for children of chronically depressed mothers but only when their mothers held more authoritarian (adult-centered) child-rearing beliefs, even after controlling for maternal education and income-to-needs ratio. In contrast, when mothers held more progressive, child-centered child-rearing beliefs, child externalizing behavior scores were unrelated to the chronicity of maternal depression.

의사결정나무를 사용한 응급의료 센터 과밀화 지표의 검증

한윤선,이영훈 한국경영과학회 2012 한국경영과학회 학술대회논문집 Vol.2012 No.5

다문화 수용성에 영향을 미치는 개인 및 가정 환경 요인과 다문화 밀집지역의 조절효과

한윤선,김부경,전수아 한국청소년학회 2014 청소년학연구 Vol.21 No.12

The purpose of this study was to identify individual and family factors associated with multicultural acceptability among non-multicultural adolescents. The moderating role of residing in neighborhoods with high concentration of multicultural families in the relationship between individual ·family environment and multicultural acceptability was also examined. Data from Wave 2 of the Korean Children and Youth Panel Survey(KCYPS), which contained information of students from 5th grade of elementary school and 2nd grade of middle school, were used for analysis. The individual-level data from KCYPS was merged with regional-level data from the Korean Census to identify information about neighborhood characteristics. Results from multilevel linear regression models with random intercepts indicated that gender, grade, and parental education had a statistically significant association with youth‘s multicultural acceptability. In terms of interaction effects, we found that living in highly-concentrated multicultural neighborhoods moderated the relationship between youth’s gender and multicultural acceptability. Based on these results, policy and practice implications for improving multicultural acceptability among non-multicultural adolescents were discussed. 본 연구의 목적은 비(非) 다문화 청소년들의 다문화 수용성을 향상시키는데 있다. 이를 위하여 먼저 비 다문화 청소년들의 다문화 수용성에 영향을 미치는 생태학적 요인을 알아보았다. 더불어 개인 및 가정 환경 요인이 다문화 수용성을 예측하는데 있어서 다문화 가구가 밀집된 지역에 거주하는 것이(다문화 접촉 수준) 어떠한 조절효과를 보이는지 살펴보았다. 이를 위하여 한국청소년 정책연구원에서 수집한 한국아동청소년패널조사의 데이터 중에서 초5와 중2 패널 제 2차 년도 데이터를 활용하였다. 아울러 한국아동청소년패널조사 자료와 통계청의 2010년 시·군·구 단위 행정자료의 지역코드를 일치시켜 개인단위 자료와 지역단위 자료를 병합하였다. 통계기법은 기술통계, Pearson의 상관분석, 다층선형회귀모형을 사용하였다. 연구 결과는 첫째, 성별, 연령 그리고 부모의 학력이 다문화 수용성에 유의미한 영향을 미치는 것으로 나타났다. 둘째, 다문화 밀집지역 거주 여부는 성별과 다문화 수용성의 관계에 있어 유의미한 영향을 미치는 것으로 나타났다. 이러한 연구 결과를 바탕으로 비 다문화 학생들의 다문화 수용성을 향상시킬 수 있는 다문화 교육의 실천적 제언을 제시하였다.

視神經路 腫瘍

韓允善,韓勇彪,朴兌城,李憲梓 대한신경외과학회 1973 Journal of Korean neurosurgical society Vol.2 No.1

Gliomas of the optic pathways make up a relatively small portion of all neoplasm of the brain with an incidence of 0.84∼3.6%. Since this tumor arises in the tract of optic pathways, one might expect to find any of the types of neoplasm arising in the glial tissue. Consquetly the absence of mitoses is an evidence that these tumors do not enlarge by cell invasion. A collateral hyperplasia of adjacent glia and connective tissue is an ample evidence of the benignancy, although the most gliomata of the optic nerve are indolent. Two cases of this communication comprised a tumor growth into the 3rd ventricle obstructing both foramina of Monro with subsequent clinical features of hydrocephalus. There is difficulty in obtaining X-ray films showing the optic canal in its entirety. The presence of full sized optic foramina in young children is also significant. The combination of J-shaped sella deformity with enlargement of the optic canal was associated with the massive intracranial extension of the tumors with obstructive hydrocephalus. Conary ventriculography was a valuable diagnostic adjunct outlining the extent of the tumor growth. Exploratory craniotomy should not be negated by the reason that mordern neurosurgical procedures can permit an accurate diagnosis and assesment of the extent of the tumors. Incomplete excision is no sin as Hudson (1912) established so convincingly. We continue to believe that histological confirmation of the presence of the tumor represents a proper and justifiable practice. Our experience suggests that efforts to relieve the increased intracranial pressure by shunt procedure rather than radical excision of the tumor mass are indicated.