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모바일 IP 상에서 명시적 멀티캐스트를 지원하기 위한 미디어 게이트웨이 설계 및 구현
양정승(Jung-Seung Yang),박용진(Young-Jin Park),김원태(Won-Tae Kim) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.2Ⅲ
All IP Mobile Network 하에서의 효율적인 멀티캐스트 전송의 필요성이 부각되고 Mobile IP 프로토콜은 기본적으로 유니캐스트전송을 지원하며, 멀티캐스트 전송에 대해서는 효과적으로 정의하지 못하고 있다. 본 연구는 Mobile IP망에 명시적 라우팅 프로토콜을 적용할 경우 기존 멀티캐스트 라우팅 도메인과의 연동을 하기 위한 미디어 게이트웨이(MGEM)를 설계하고 개발한다. 기존 멀티캐스트 트래픽을 1:N tunnel 의 특성을 가지는 명시적 멀티캐스트 전송방식을 사용하여 멀티캐스트 패킷을 이동단말들에 전송하기 위해서는 Mobile IP 홈에이젼트가 MGEM으로 확장되어야 하며, 이는 IGMP, SDP, 확장 HA 및 멀티캐스트 라우터 기능을 갖도록 요구된다.
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양정승 ( Jung Seung Yang ),김유미 ( Yu Mi Kim ) 한국노동경제학회 2014 노동경제논집 Vol.37 No.3
This study analyzes the initial effect of meister high school policy on labor market byDID based on the fact that most of the meister high schools that had its first graduates in 2013 were not newly established but assigned by government. We estimated employment and real hourly wages as quantitative measures and intent to remain in labor market as qualitative one. The results shows that, the meister high school policy increased the employment rate but didn’t do real hourly wages and intent to remain. Therefore, meister high school policy can be assessed to be successful in short-term only in quantitative aspects. The study has its contribution as the first study of estimating the net effect of the policy.
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양정승 ( Jung Seung Yang ) 한국노동경제학회 2012 노동경제논집 Vol.35 No.2
In the study, we try to get reliable estimates of intergenerational income mobility in Korea. At first, we show that the low estimates of previous studies are mainly due to sample seleciton problem. The direct estimations using OLS after correcting this problem show higher values than previous estimates. We also compute the attenuation bias by decomposing the variances of earnings into the variances of permanent and transitory components of earnings by the results of the regression. Additionally, we try to estimate the range of intergenerational mobility by comparing the OLS results with the results of the two samples instrumental variable estimation and the three samples instrumental variable estimation. The results of these estimations are a little higher than or similar to OLS results.
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양정승 ( Jung Seung Yang ) 한국치위생학회 2004 한국치위생학회지 Vol.4 No.1
There are two purposes in this study. The first one is to collect some oral health information through the investigations upon the oral health care of Korean adults. Referring to the result of the investigation, I wanted to furnish fundamental data with oral health education for each age and with a publicity booklet editing. That is the second purpose of this research. Among the people who visited Seo-gu Public Health Center in Kwang-ju, 207 people answered the questionnaires. There were 86 men and 121 women from the 20-aged to the 59-aged. The questionnaires covers knowledge aquisition path for dental caries prevention, the cognition degrees for the causes of dental caries and its prevention, the cognition degrees for the causes of periodontal disease and its prevention, the degrees for oral health methods, and the importance of oral health. The conclusions are as follows: 1. The cognition degree for dental caries prevention: The cognition for pit and fissure sealant was appeared most highly in thirties by 85.3%, but 62.1 % in fifties was answered, Never heard. The cognition degree for fluoride application was appeared most highly in thirties by 73.5%, and the cognition degree for water fluoridation was most highly in forties by 54.2%. 2. The knowledge for pit and fissure sealant was acquired mostly through dental hospital in every age by 54.2%. 3. The knowledge for fluoride application was learned mostly through dental hospitals in twenties and thirties by 32.7%, and mostly through TV or radio health programs in forties and fiftieseach by 35.7% and 50.0%. 4. The knowledge for water fluoridation was acquired through TV or radio programs in all ages such as twenties, thirties, forties and fifties. Its rate was 57.8%. 5. The cognition degree of the cause of dental caries: 53.1% of all ages think that dental caries can most frequently be caused by being lack of toothbrushing. 6. The cognition degree of the cause of periodontal disease: 58.5% people of all ages think that both dental plaque and calculus might be the main cause of periodontal disease. 7. The cognition degree of dental caries prevention: 72.8% people think that dental caries can be prevented by right tooth brushing method, and 8.7% people think that they can be prevented by scaling. However, 10.7% people of them were not interested in dental caries prevention. 8. The importance of oral health: 35.3% people think that teeth health is the most important, and 63.8% people think oral health is one of the most important health problems. Forties answered that tooth health was the most important thing, and fifties, thirties and twenties followed in the order. 9. The cognition for oral health maintenance: all ages(twenties, thirties, forties, and fifties) answered that right toothbrushing method was the best way to keep oral health by 69.1%.
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양정승 ( Yang Jung-seung ),김신애 ( Kim Sin-eae ) 한국보건사회연구원 2022 국제사회보장리뷰 Vol.22 No.-
프랑스는 2017년부터 ‘장기실업 제로 지역 실험’(TZCLD)을 시작하였다. 모든 사람은 일할 수 있고 일할 권리를 갖는다는 측면에서 실업 문제에 접근하였다는 점에서 수요 맞춤형 직업훈련 제공과 일 경험을 통한 노동시장 정착이라는 기존의 적극적 노동시장 정책과는 큰 차별성이 있다. 고용할 수 없는 사람은 없고 일자리는 부족하지 않으며, 일자리 창출 비용보다는 장기실업으로 인한 사회적 비용이 더욱 크므로 재정은 문제가 되지 않는다는 원칙에 입각하여 2020년 1단계 실험을 마쳤고, 실험 결과에 대한 긍정적 평가와 함께 2021년부터 2단계 실험 과정에 돌입하였다.
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