임플란트 고정체와 지대주 연결 형태의 차이에 따른 유지 나사 안정성에 대한 연구

양재식,방몽숙,조규종,Yang Jae-Sik,Vang Mong-Sook,Jo Gyu-Jong 대한치과보철학회 2004 대한치과보철학회지 Vol.42 No.1

Statement of problem : Since the concept of osseointegrated dental implant by $Br{\aa}nemark$ et al was first applied to mandibular full edentulous patients. Recently it is considerated the first treatment option on missing teeth. A common problem associated with dental implant restorations is loosening of screws that retain the prosthesis to the abutment and the abutment to the implant fixture. Purpose : This study is to examine the influence on screw loosening of implant-abutment designs. Material and methods : External hex, cone screw, beveled hex, cam cylinder, cylinder hex by means of evaluating the loosening torques, with respect to a range of tightening torques after repeated loading. Result : 1. Cone screw, beveled hex groups are the highest initial tightening rate and cylinder hex, external hex groups are the lowest initial tightening rate (p < 0.05). 2. Cone screw groups are the highest after repeated loading tightening rate and cylinder hex groups are lowest after repeated loading tightening rate(p < 0.05). 3. Cone screw groups have the highest initial stability and anal stability. 4. All groups are decreased tightening rate after repeated loading.

환경교육 교재의 적합성 분석

양재식(Jae-Sik Yang),남상준(Sang-Joon Nam) 한국환경교육학회 2003 環境 敎育 Vol.16 No.2

This study has an aim to construct a reference frame to analyze the appropriateness of environmental education(EE) materials of elementary schools, and to search the basic direction of the scheme for analysis. In addition, this study has an aim to induce what the results of this analysis suggests for the development and reconstruction of EE materials. It was analyzed how truly EE materials reflected contents selected as an analysis scheme, after grasping practical use and features of textbooks, audio-visual materials, and a web-site that are typical materials in EE of elementary schools.<br/> The results in textbook analysis were that there were a human-centered environmentalism in the EE unit (Environmentally Sound National Development, 5th Grade) of Social Studies. The result in analysis of audio-visual materials Environmental Warrior, Zentaforce of EBS, were that there are unhealthy environmentalism in that material. In other words, technology itself is considered as a almighty means to solve environmental problems.<br/> Finally, the result in web-site analysis were that the Environmental Class of Ministry of Environment did not have sound environmentalism. <br/> The above result of study shows us that the most important thing in developing and using the environmental education materials is to have sound environmental values and EE perspective, to evaluate EE material with various point of view, to judge its result, and to use it.

한국 여가정책의 정체성 확보를 위한 연구

양재식(Yang, Jae-Sik) 한국체육과학회 2013 한국체육과학회지 Vol.22 No.2

Today, Korea is changing to leisure society. With that stream, leisure becomes important policy area due to the roles of meeting desires for better quality of life, promoting social integration and industrial resource. But in case of Korean leisure policy, it still has no independent policy area because of unclear object and high relations with similar areas like culture, sport and social welfare. So, this study suggests arguments on identity of leisure policy, to confirm independent area of leisure policy for comprehensive policy making. First, in terms of policy purpose, precedent leisure policies and studies have suggested improvement of life quality as eventual purpose of leisure policy, mainly. But improvement of life quality is common goal of most public policy, so, that can’t confirm identity of leisure policy. On the other hand, in case of advanced countries and some independent leisure policies, they set getting leisure life or promoting of leisure culture as goals. Thus, to confirm identity of leisure policy and get independent policy area, it is needed to set leisure’s own policy goals as highest purpose under eventual goal for improvement of life quality, and try to practical application of that in actual fields. Second, in terms of policy instrument, precedent leisure policies and studies have tried to include the other policy area’s means having even small relations. But those attempts would confuse identity of leisure policy, because those policy means would treat leisure as instrument, but not goals, and change characteristics of leisure policy through that. Therefore, to confirm leisure policy’s identity, efforts to search leisure policy’s own goals and recognition changes to distinguish policy means treat leisure as instrument should be performed. Third, in terms of policy target, precedent leisure policies and studies have classified and set targets by metrics of social welfare, economical and social status. Thus, to confirm identity of leisure policy, from the perspective of social right of leisure, leisure policy targets should be set according to levels of leisure participation capability as leisure’s own standard.

병렬형 디젤 하이브리드 전기 자동차의 연비 시뮬레이션

양재식(Jaesik Yang),염기태(Kitae Yeom),배충식(Choongsik Bae),김현옥(Hyunok Kim) 한국자동차공학회 2007 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-

This research presents a simulation for the fuel economy of parallel diesel hybrid vehicle. Diesel engines compared to gasoline engines have the advantages of higher fuel economy and lower CO₂ emission. One of the most ways to meet future fuel economy and emissions regulation is to combine diesel engine technology with a hybrid electric vehicle. The simulation of HEV is growing need for rapid analysis of the many configurations and component options. WAVE, a one-dimensional engine analysis tool, was used to a 2.7L diesel engine. ADVISOR, designed for rapid analysis of the performance and fuel economy of vehicle models, was used to conventional and hybrid electric vehicle by the use of output file from WAVE as the input engine data file for ADVISOR. A parallel diesel HEV is at least 19.7~36% higher fuel economy and improved acceleration ability compared to a conventional diesel vehicle. The energy loss of the parallel diesel HEV is 23~38% less than the conventional vehicle using regeneration.

서비스 오버레이 네트워크를 이용하여 개인화된 IPTV 콘텐츠 전달을 위한 P2P Multicasting 구조

양재식 ( Jaeshik Yang ),정일영 ( Ilyoung Chong ) 한국정보처리학회 2010 한국정보처리학회 학술대회논문집 Vol.17 No.2

IPTV 서비스와 함께 홈 채널 서비스가 제공되면 개인이 프로슈머의 입장에서 콘텐츠를 생산 및 소비할 수 있게 된다. 서비스 오버레이 네트워크에서 개인화된 콘텐츠를 이용하고자 하는 개인 이용자들을 묶어서 하나의 가상 그룹으로 형성하고 개인화된 콘텐츠를 송신, 수신 할 때 서비스 오버레이 네트워크에서는 개인화된 콘텐츠의 송신, 수신을 위해 P2P 를 지원한다. 서비스 오버레이 네트워크에서 지원하는 P2P 는 이용자 환경, 상황, 네트워크 상황 등을 능동적으로 인지하여 개인 혹은 다수에게 개인화된 콘텐츠를 전달 할 수 있어야 한다. 따라서 능동적으로 서비스 오버레이 네트워크가 형성될 때 개인이 콘텐츠를 공유, 소비하기 위해 개인 혹은 다수에게 개인화된 콘텐츠를 전달하기 위한 P2P 멀티캐스트 구조를 제안 한다.

모바일 IPTV 의 N-스크린 서비스를 위한 DSON 구조에서 신뢰적 스트리밍 서비스를 제공하기 위한 구조적 모델

양재식(Jaeshik Yang),김양중(Yangjung Kim),정일영(Ilyoung Chong) 한국통신학회 2012 한국통신학회 학술대회논문집 Vol.2012 No.2

장애아동 생활체육의 정책 패러다임 연구

양재식(Jae-Sik Yang),조병준(Byung-Jun Cho),이문숙(Moon-Sook Lee) 한국컴퓨터정보학회 2024 韓國컴퓨터情報學會論文誌 Vol.29 No.1

차량 운전성 개발 전략에 대한 연구

양재식(Jaesik Yang) 한국자동차공학회 2020 한국자동차공학회 학술대회 및 전시회 Vol.2020 No.11

내시경적 유두절개술 38 예의 임상적 고찰

양재식(Jea Sik Yang),이명구(Myung Goo Lee),임현석(Hyun Suk Lim),김우중(Yoo Joung Kim),박충기(Choong Kee Park),임규성(Kyu Sung Rim) 대한내과학회 1988 대한내과학회지 Vol.34 No.2

N/A The usefulness of EPT, to remove biliary atone is widely approved. So we reporters are willing to investigate and report 39 cases of EPT. out of 420 cases of ERCP performed from September 1983, to April 1987 in Kangnam Sacred Heart Hospital, Seoul, Korea. The results are as follows: 1) The distribution of age was from 24 year to 77 year old, and the sixties were 15 cases (37.7%), the most. The difference of sex could be disregarded; 18 men and 20 women. 2) The histories of cholecystectomy were found in 20 cases out of 39 ones. 3) There were the stones in 38 cases out of 39 cases: The most frequent site was common bile duct in 21 cases. 4) Out of 32 ca of the first EPT. (1) In 6 ca stones were confirmed in stool. (2) In 7 cases stones were confirmed in basket extraction and natural passing at EPT. (3) In 17 cases stones extraction were confirmed at second ERCP, & the improvement of clinical & laboratory. (4) 2 cases were not followed-up. 5) Out of 6 cases failed at first EPT, 2 cases were impacted stones, and managed by operation, 3 cases were incomp1ete excision; we succed at second performance. 1 case was very large stone (6×2×2); we succed in passing the stone at third performance by lithotripsy without significant complication. 6) Size of the removed stones was 0.5 cm to 6 cm. Lots of stones were 1.5 cm to 2.5 cm(12 cases-31.6%) and in 2 cases the stones were over 5 cm. 7) After EPT, it's complication was found in 4 cases (10.5%): in 2 cases transfusion was demanded because of bleeding; in 2 cases operation was performed because of impacted stone.

웹 기반 N-screen 환경에서 Community 서비스 제공을 위한 SONF 제어기능 모델 및 서비스 시나리오

양재식 ( Jae-shik Yang ),정일영 ( Il-young Chong ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.2

N-screen 은 여러 단말을 통한 콘텐츠 소비형 서비스로써 이용자 환경과 요구사항에 반응하여 연속성을 가지고 이용자가 원하는 단말을 통해 제공될 수 있다. 자신이 가지고 있는 다양한 단말만 아니라 인증을 거친 다른 사용자가 가진 단말에도 N-screen 을 제공할 수 있다. 서로 다른 서비스 이용자 간 N-screen 을 제공하기 위한 플랫폼으로써 웹 플랫폼을 이용할 수 있다. 웹은 N-screen 을 제공하기 위해 가장 우선시 되는 요구사항인 플랫폼의 통합을 이끌어 낼 수 있으며 서비스 플랫폼과 협업을 통해 서비스 이용자의 요구사항을 만족시키고 동시에 Community 융합을 통해 전혀 새로운 서비스로 제공될 수 있다. 이에 본 논문에서는 웹 기반 N-screen 환경에서 Community 서비스 제공을 위한 서비스 제어기능 모델을 제안하고 그에 따른 서비스 시나리오를 설명한다.