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Botryoid Odontogenic Cyst on Mandibular Anterior and Both Body Area: a Case Report
남정훈,김다영,박영주,안장훈,강태인,박미희,유우근,김보균,이정원,김정희,Nam, Jeong-Hun,Kim, Da-Young,Park, Young-Ju,Ahn, Jang-Hoon,Gang, Tae-In,Park, Mi-Hee,Yu, Woo-Geun,Kim, Bo-Gyun,Lee, Jung-Won,Kim, Jung-Hee Korean Association of Maxillofacial Plastic and Re 2010 Maxillofacial Plastic Reconstructive Surgery Vol.32 No.4
Botryoid odontogenic cyst (BOC) is considered a rare multilocular variant of the lateral periodontal cyst. In this report, a 67-year-old male visited with chief complaint of severe mobility on mandibular incisors. Multilocular radiolucent lesion was seen from the right premolar to the left premolar area, involving almost the whole mandible. Histologically, the botryoid odontogenic cyst showed focal nodular thickening of the lining epithelium. These thickening often showed swirling appearance of the cells. Cyst enucleation and bone graft on mandible anterior and both body area were performed under general anesthesia, and postoperative healing was favorable without recurrence.
남정훈,노경록,유우근,이병민,전지현,박수현,안장훈,김정희,Nam, Jeong-Hun,Noh, Kyung-Lok,Yoo, Woo-Geun,Lee, Byeong-Min,Jeon, Ji-Hyeon,Park, Su-Hyun,Ahn, Jang-Hoon,Kim, Jung-Hee Korean Association of Maxillofacial Plastic and Re 2011 Maxillofacial Plastic Reconstructive Surgery Vol.33 No.1
The goal of this treatment is the surgical-orthodontic eruption of impacted permanent teeth associated with a large dentigerous cyst in a preadolescent patient. Although enucleation of the entire cyst and the extraction of impacted teeth are common treatments, missing permanent teeth cause several problems in young patients. In this report, an 11-year-old female visited with the chief complaint of a large radiolucent lesion from the mandibular anterior area to the left mandibular posterior area. The permanent left canine and premolars were displaced toward the mandibular inferior border area. The extraction of infected deciduous teeth and marsupialization were performed. After 4 months, orthodontic buttons for forced eruption were applied to the impacted permanent teeth. The teeth emerged into the oral cavity 3 months after the orthodontic treatment. Although the root form was abnormal, there were no other pathogenic signs. The alveolar bone had a normal trabecular pattern and the teeth appeared to be well maintained at postoperative 24 months.
남정훈(Jung Hoon Nam),김성문(Sung Mun Kim) 한국사회체육학회 2008 한국사회체육학회지 Vol.0 No.34
The purpose of this study was to develop psychological skill factor scale for short track speed skaters. The 76 items in the existing scale developed were selected to verify the structural validation of short track speed skaters` psychological skill factors and the 32 items were made through interviews and open-ended questionnaire in the national team coaches and former current national short track speed skaters. and the total of 108 items were selected in preliminary items. Four hundred forty one subjects were surveyed after 51 items of 7 factors were extracted through relevance and content validation of items. Exploratory factor analysis was conducted to seek the factors of psychological skill factor scale of short track speed skaters and confirmatory factor analysis was done to verify the conceptual validation. The results are as follows: First, the psychological skill scale of short track speed skaters consisted of 4 factors(strategy, needs for victory, mental toughness, self-confidence). Second, the result of reliability and index values of good of fit was rated as good(Cronbach`α=.777~.802, x2=78.56, GFI=.90, AGFI=.89, RMR=.05).
전자산업의 공급사슬 특성을 고려한 부품공급사의 재고비용 산정기준 제시
남정훈 ( Jung-hoon Nam ),황승준 ( Seung-june Hwang ) 한국생산성학회 2017 生産性論集 Vol.31 No.2
SCM activities in a company are total activities for efficient integration and cooperation related to production and distribution to satisfy total optimization of the supply chain and customer satisfaction as well. Also, considering it as innovation activities for the survival companies, reducing inventory level and its costs are managed as the key indexes for SCM performance. Recently, the importance of SCM activities in the component suppliers which advanced overseas together with its client company has been emphasized by the request of the product manufacturer due to rapid international expansion of the enterprise resources. Especially, in the electronics industry, the value of product inventory and component inventory is falling sharply because of their short product life cycle and the frequent new model launch. And the part costs due to price negotiation with a product manufacturer also influences the component suppliers` business. However, the study on the SCM performance and the inventory costs in the component suppliers are insufficient and the definite estimation criteria are also uncertain. In this research, we defined new estimation criteria of the component total inventory cost from the component supplier`s view, considering the supply chain characteristics in electronics industry. In addition, we performed the case study to verify the component total inventory cost`s influence on the business performance by applying the new criteria to four component suppliers that supply key component to global product manufacturer. Consequently, we suggested new estimation criteria on the total inventory costs of the supply chain of the electronics industry related to the product total inventory cost of the product manufacturer defined in the previous study.
남정훈(Jung Hoo Nam),김성문(Sung Mun Kim),윤상문(Sang Moon Yoon) 한국사회체육학회 2009 한국사회체육학회지 Vol.0 No.38
The purpose of this study is to extract psychological factors that influence Ssireum player`s performance and to search for the structures which affect their said performance, and thus to specify the relative importance of those psychological factors. For this study, the literature that figured out the psychological factors that had affected their performance was investigated, and 27 kinds of psychological factors were collected and the content analysis was conducted via the open-standards and per-investigation for interview designed for 258 Ssireum players. Based on the results of the content analysis, 203 Ssireum players belonging to middle schools, junior high schools, and universities and general adult teams were asked to take part in this survey, and on a basis of the results, 220 Ssireum players in those said teams were asked to fill out the questionnaire. Based on the analysis on confirmative factors, the analytic hierarchy process aiming for 15 leaders in the general teams has been conducted. As a result, 11 kinds of psychological factors were structured into approximately 3 causes-`endurance`, `jinx management`, and `strenuous effort`.
Multi-Level Fast Multipole Method와 반복적 물리 광학법을 이용한 대규모 복합 임피던스 및 유전체 매질 전자기 산란 해석
남정훈(Jeong-Hun Nam),유정운(Jeong-Un You),고일석(Il-Suek Koh) 한국전자파학회 2021 한국전자파학회논문지 Vol.32 No.10
임피던스 매질과 유전체로 구성된 대규모 복합 매질의 전자기 산란 해석을 위한 MoM 행렬 방정식 어셈블리방법을 제안한다. 이산화된 산란체 표면의 삼각형 메쉬(mesh)마다 매질 정보를 할당하며, 이를 기반으로 복합 매질 산란체 표면간의 상호작용을 계산한다. 하나의 edge에 할당된 삼각형의 개수가 2개 이상인 경우 half-RWG 기저함수를 할당하여 Z행렬 요소를 계산한다. IPO는 매질에 따라 적절한 반사계수를 고려하여 산란체 표면 위에서 지역적 평면 근사화를 통해 해석한다. 제안한 MoM과 IPO를 상용 툴인 FEKO, CST와 비교함으로써 수치적인 정확도를 검증한다. We propose a method of moments (MoM) matrix assembly method for electromagnetic scattering analysis of large-scale complex materials composed of impedance and dielectric media. Material information is assigned to each triangular mesh of the discretized surface, and the interaction among the meshes is calculated. If several meshes are assigned to one edge, the half-Rao-Wilton-Glisson (RWG) basis function is used to calculate the Z matrix elements. Iterative physical optics (IPO) analysis is performed based on the local tangential approximation for the scatterer surface and the appropriate reflection coefficient of each mesh. The numerical accuracy is verified by comparing the proposed MoM and IPO results with those of the commercial tools FEKO and CST Studio Suite.