http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
무치악 환자 에서 Neutral Zone 방법을 적용한 임상 증례
김용식,이병욱,Kim, Yongsik,Lee, Byunguk 대한턱관절교합학회 2001 구강회복응용과학지 Vol.19 No.2
The prosthodontic treatment of severely resorbed edentulous patients has been one of the frustrating areas due to extensive loss of tissues. The integrated neuromuscular balance among tongue, lip, and cheek is compromised. The retention, stability, and support are the three major factors to influence the clinical outcome. Fish described a denture as having three surface, with each surface playing an independent and important role in the over all fit, stability, and comfort of the denture. He recommended that the polished surface should be a series of inclines so that pressure from muscular activity will retain dentures. Within the denture space there is an area that has been termed the neutral zone. The neutral zone is that area in the mouth where, during function, the forces of the tongue pressing outward are neutralized by the forces of the cheeks and lips pressing inward. According to Jacobson and Krol, neuromuscular control interacts to provide retention and the relationship of polished surface of denture base to the surrounding muscular structure of orofacial capsule facilitates the stability and retention. This neutral zone concept has been demonstrated with various modification by a number of authors. The theory used to develop the denture base contours is based on the belief that the muscle should functionally mold not only the border but the entire polished surface. Lott and Walsh reported the clinical success on complete mandibular dentures with application of neutral zone concept. A number of studies demonstrated that denture stability and retention are more dependent on correct position of the teeth and correct contour of external surfaces of the denture in a severely resorbed alveolar ridge. This article presents a prosthodontic approach to treatment of a edentulous patient using neutral zone technique to improve the retention and stability of the prosthesis.
김용식,윤병식,양승한,Kim, Yongsik,Yoon, Byungsik,Yang, Seunghan 한국압력기기공학회 2014 한국압력기기공학회 논문집 Vol.10 No.1
There were many flaw issues of reactor vessel head penetration in USA fleets. USNRC issued 10CFR50.55a to implement reactor vessel head penetration ultrasonic examination performance demonstration(PD) in US for enhancement of inspection reliability. After September 2009, all US utilities inspected their RVHP with PD qualified system. Korea Hydro and Nuclear Power Company(KHNP) have developed reactor vessel head penetration performance demonstration system for ultrasonic test to apply for pressurized light-water reactor power plants in accordance with 10CFR50.55a since September 2011. RVHP configuration surveying and analysis, code requirement analysis, and performance demonstration specimen design were performed up to this day. Fingerprinting of manufactured specimen, development of test data management program, development of operation procedure, input of flawed data, and development of final report will be performed for the next step. This paper describes the development status of the performance demonstration system for reactor vessel head penetration ultrasonic examination in Korea.
김용식(Yongsik Kim),박윤서(Yoonseo Park) 한국경영과학회 2015 經營 科學 Vol.32 No.4
This study focuses on the network externality effect related to the platform supplementary services. This study designs the network externality of platform and suggests a supplementary service adoption model. Additionally, this study examines the moderating effect of demand forecasting for the platform. Using AMOS program, a structural equation modeling has been used to analyze the research model. The findings can be summarized as follows : First, we find out the structural relationship among the factors (usefulness, perceived value, purchase intention) affecting adoption of the supplementary services. Second, positive perception of platform flow can promote the platform interaction. Third, positive perception of present users based on platform can arouse friendly evaluation in the platform interaction. Fourth, loyalty to the platform brand can improve the perceived usefulness of supplementary services, but cannot lessen the resistance to supplementary service cost. In addition, the moderating effects of demand forecasting for the platform in the path leading from platform factors to supplementary service factors were identified. In conclusion, traditional brand strategy may be effective in platform marketing activities but the extent of performance in the strategy can appear to be quite different. Therefore, taking the relationship with network externality into consideration should be involved in the marketing strategy in platform.
유한차분법과 병렬 시뮬레이션을 통한 주택저당증권 가치 평가
김용식(Yongsik Kim),손정복(Jeongbok Son),유재인(Jane Yoo) 한국경영과학회 2021 한국경영과학회지 Vol.46 No.3
In this paper, we apply parallel computing using a message-passing interface to pricing the Mortgage Backed Securities (MBS) with multiple tranches. We use the Finite Difference Method (FDM) to the differential equations of modeling MBS and determine the numerical solutions for the MBS. Our benchmark is the MBS 2017-11 issued by the Korean Housing Corporation. To obtain the interest rate condition for mortgage early repayment under the CIR (Cox et al., 1985) assumption, we calibrate the key variables on the interest rate process by the General Method of Moment (GMM). We also define the boundary conditions of the solutions in risk-neutral valuation through the Monte Carlo simulations. Our results suggest that the MBS needs to be issued with a long maturity to keep the risk-neutral position. Finally, we show that the parallel computing process successfully reduces costs and time for MBS pricing.
제품 인증마크가 소비자의 제품선택에 미치는 영향 비교 연구
김용식(Yongsik Kim),박윤서(Yoonseo Park),이영미(Rongmei Li) 한국콘텐츠학회 2017 한국콘텐츠학회논문지 Vol.17 No.8
제품 인증마크는 소비자의 의사결정에서 제품의 품질수준을 판단할 수 있는 신뢰성 있는 정보를 제공해준다. 이 연구에서는 인증마크가 제품태도에 미치는 긍정적인 영향을 실증해 보고, 제품의 가격수준을 조절변수로 도입하여 그 차이를 검증하였다. 또한 각각의 경우에서 한국과 중국 두 국가간 비교연구를 시행하였다. 제품특성에 의한 영향을 고려하여 두 가지의 복수 제품을 사례로 조사하였다. 그 결과 인증마크가 제품 태도에 미치는 효과는 중국보다 한국 소비자에게서 더 강하게 나타나는 것을 확인할 수 있었다. 가격수준의 조절효과는 중국 소비자의 경우, 그리고 높은 가격수준의 상황에서 더욱 강하게 나타난다는 것을 알 수 있었다. 본 연구는 무엇보다도 인증마크의 효과성에 대한 국가간 비교 연구라는 점에서 연구 의의가 크다고 생각되며, 가격수준에 따른 인증마크 효과의 차이를 검증하여 새로운 탐색적 연구방향을 제시하였다는 점에서 시사점이 있다. Product Certification Marks can be used as reliable information in terms of product quality to consumers. This study focuses on how each product attitude of consumers in Korea and China can be changed depending on attachment of product certification mark. Based on nations, product certification marks, and price levels, eight types of questionnaire are distributed and collected where the respondents are allowed to answer product attitudes of two different products in oder to minimize the effect of the product characteristic. As a result, the product attitude of Korean consumers has been showed to more depend on product certification mark than that of Chinese consumers does. The moderating effect of price has been stronger on Chinese consumers than on Korean consumers, and in the case of high price there has been a distinct gap between two countries. This study has its meaning in the way of that the product certification mark has been considered in relation to price level and differently affected product attitude between two countries.