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DASH 환경에서 QoE 향상을 위한 콘텐츠 특성 기반의 비디오 품질 조절 기법
윤기명(Kimyung Youn),정광수(Kwangsue Chung) Korean Institute of Information Scientists and Eng 2015 정보과학회논문지 Vol.42 No.8
Recently, the web-based adaptive streaming service, DASH (Dynamic Adaptive Streaming over HTTP), is receiving more attention. However, existing network-based and buffer-based video quality control schemes in DASH environments make oscillation of segment throughput, causing degradation of the quality of experience (QoE) with frequent quality changes and playback interruptions because these schemes do not consider the content characteristics. In this paper, we propose a C-DASH (Content Characteristics based Dynamic Adaptive Streaming over HTTP) scheme in order to improve the QoE in DASH environments. The C-DASH scheme performs seamless and smooth quality control based on the segment throughput, buffer status, and segment size of the content. Based on simulation results, it is confirmed that the C-DASH scheme can improve the QoE, when compared with the existing quality control schemes.
여행사종사자의 성격유형에 따른 직무스트레스와 만족에 관한 연구
윤기명(Yoon, Ki-Myung),김성동(Kim, Sung-Dong) 국제관광산업학회 2009 국제관광산업연구 Vol.2 No.4
As information society in 21C is rapidly changing. stresses of people working for travel agency in service industries are more and more deepening. Rapidly changing environment not only results in unsatisfaction for jobs but also likely job transferring affecting organization's achievement severely. Therefore. people who are involved in human service in travel agencies need to be more and more interested in control and manage stresses which occur during their jobs. Academic researches have been carried out so far. but although those preceding researches have recognized importances for stresses, researches sincerely clarifying jobs in people who are involved in travel agencies have not carried out, and moreover, researches regarding personality stress and satisfaction have almost not been carried out. Therefore‘' this research is to survey emotions and satisfaction levels due to stresses for each characteristic by measuring personal characteristic of those people using program check ing in Enneagram . and thus 10 suggest management plan for the people. And based on these, this paper has its goal for providing theoretical basis for taking advantage of personality inspection and customer service for newly employed people.
현승범(Hyun Seung-Bum),윤기명(Yoon Ki-Myung),윤기열(Yoon ki-Yeol) 국제관광산업학회 2008 국제관광산업연구 Vol.1 No.1
The purpose of the study is to propose an effective method of obtaining the legal and institutional status for serviced residence in the future. The conclusions of the study are as follows. Firstly, as one of the national strategic industries for growth, the serviced residence shall be included in the objects of the tourism promotion policies. Secondly, some legal apparatus shall be prepared for the serviced residence, which has played a great role in promoting the national tourism industries in Korea, so that it can be institutionalized as an area of industries. Thirdly, in the current practice, the regulation of the serviced residence through limit on the number of using days does not match up with the points of the tourism promotion laws, the national tourism policy directions and the government"s deregulation polices, so, new re-examination shall be made in the right direction in which the serviced residence can contribute to the development of the national tourism industries in Korea. Fourthly, the continuous governmental supports and assistance shall be made to the serviced residence, so that it can strengthen its competitiveness, innovating its old ideas and institutions, playing its roles suitable to the global age.