무선 센서 망에서 2-계층 가상 구조를 통한 이동 싱크 실시간 데이터 전달 방안

오승민(Seungmin Oh),임용빈(Yongbin Yim),이정철(Jeongcheol Lee),박호성(Hosung Park),김상하(Sang-Ha Kim) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.5

무선 센서 망에서 고정 싱크에 대한 실시간 데이터 전달 방안들은 전송 경로 상의 매 홉마다 초기에 계산된 일정한 전송 속도를 만족함으로써 실시간 데이터 전달을 달성한다. 이동 싱크의 경우에는 소스와 싱크 간의 거리가 시간에 따라 가변적이기 때문에 일정한 전송 속도로는 실시간 전송을 보장할 수 없다. 본 연구에서는 이동 싱크의 실시간 전송에 대한 요구사항을 정의하고 이를 기준으로 실시간성을 보장하는 프로토콜을 제시한다. 이 프로토콜은 2-계층의 구조로 구성된다: 상위 계층, 하위 계층. 상위 계층에서는, 소스와 싱크가 존재하는 지역까지의 실시간성과 이동을 위한 위치 업데이트를 관리하고, 하위 계층에서는 싱크가 존재하고 있는 지역에서 이동 싱크까지의 지역 단위의 실시간 전송을 보장한다. 전체 실시간성은 상위, 하위 계층의 실시간성을 각각을 만족함으로써 달성된다. In wireless sensor networks, the studies achieve real-time data dissemination to static sinks by a spatiotemporal communication approach which forwards data per hops with an initially calculated delivery speed. However, in case of mobile sink, since the sink moves randomly around thus the distance between the sink and the source is dynamically changed, real-time data dissemination could not be guaranteed with the delivery speed. Therefore, we define requirements for real-time data dissemination to mobile sinks and propose a new scheme based on the requirements. In the scheme, the networks construct a two-level grid-based virtual infrastructure: the coarse-grained grid and the finegrained grid. The coarse-grained grid and fine-grained grid structure manages real-time data dissemination from source to the grid leader of a mobile sink and from the grid leader of the mobile sink to the sink, respectively. The real-time data dissemination from a source to a sink is achieved by real-time data dissemination of both the coarse-grained grid and fine-grained grid. The simulation results show that the proposed scheme superior to the existing scheme in terms of guaranteeing of real-time data dissemination.

Design and evaluation of a GQS-based time-critical event dissemination for distributed clouds

Bae, Ihn-Han The Korean Data and Information Science Society 2011 한국데이터정보과학회지 Vol.22 No.5

Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and configuration of the system that delivers the services. Cloud computing providers have setup several data centers at different geographical locations over the Internet in order to optimally serve needs of their customers around the world. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting inter-cloud data management and dissemination. In this paper, we propose a group quorum system (GQS)-based dissemination for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event notification and so forth. The proposed GQS-based method organizes these distributed clouds into a group quorum ring overlay to support a constant event dissemination latency. Our numerical results show that the GQS-based method improves the efficiency as compared with Chord-based and Plume methods.

Design and evaluation of a GQS-based time-critical event dissemination for distributed clouds

Ihn Han Bae 한국데이터정보과학회 2011 한국데이터정보과학회지 Vol.22 No.5

Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and con guration of the system that delivers the services. Cloud computing providers have setup several data centers at di erent geographical locations over the Internet in order to optimally serve needs of their customers around the world. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting intercloud data management and dissemination. In this paper, we propose a group quorum system (GQS)-based dissemination for improving the interoperability of inter- cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event noti cation and so forth. The proposed GQS-based method or-ganizes these distributed clouds into a group quorum ring overlay to support a constant event dissemination latency. Our numerical results show that the GQS-based method improves the efficiency as compared with Chord-based and Plume methods.

A GGQS-based hybrid algorithm for inter-cloud time-critical event dissemination

Bae, Ihn-Han The Korean Data and Information Science Society 2012 한국데이터정보과학회지 Vol.23 No.6

Cloud computing has rapidly become a new infrastructure for organizations to reduce their capital cost in IT investment and to develop planetary-scale distributed applications. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting inter-cloud data management and dissemination. In this paper, we propose a geographic group quorum system (GGQS)-based hybrid algorithm for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event notification and so forth. The proposed algorithm first organizes these distributed clouds into a geographic group quorum overlay to support a constant event dissemination latency. Then it uses a hybrid protocol that combines geographic group-based broad-cast with quorum-based multicast. Our numerical results show that the GGQS-based hybrid algorithm improves the efficiency as compared with Chord-based, Plume an GQS-based algorithms.

Design and evaluation of a GQS-based time-critical event dissemination for distributed clouds

배인한 한국데이터정보과학회 2011 한국데이터정보과학회지 Vol.22 No.5

Cloud computing provides computation, software, data access, and storage services that do not require end-user knowledge of the physical location and conguration of the system that delivers the services. Cloud computing providers have setup several data centers at dierent geographical locations over the Internet in order to optimally serve needs of their customers around the world. One of the fundamental challenges in geographically distributed clouds is to provide ecient algorithms for supporting intercloud data management and dissemination. In this paper, we propose a group quorum system (GQS)-based dissemination for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event notication and so forth. The proposed GQS-based method organizes these distributed clouds into a group quorum ring overlay to support a constant event dissemination latency. Our numerical results show that the GQS-based method improves the eciency as compared with Chord-based and Plume methods.

A GGQS-based hybrid algorithm for inter-cloud time-critical event dissemination

배인한 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.6

Cloud computing has rapidly become a new infrastructure for organizations to reduce their capital cost in IT investment and to develop planetary-scale distributed applications. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting inter-cloud data management and dissemination. In this paper, we propose a geographic group quorum system (GGQS)-based hybrid algorithm for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing, event notification and so forth. The proposed algorithm first organizes these distributed clouds into a geographic group quorum overlay to support a constant event dissemination latency. Then it uses a hybrid protocol that combines geographic group-based broadcast with quorum-based multicast. Our numerical results show that the GGQS-based hybrid algorithm improves the efficiency as compared with Chord-based, Plume and GQS-based algorithms.

A GGQS- based hybrid algorithm for inter-cloud time-critical event dissemination

Ihn Han Bac 한국데이터정보과학회 2012 한국데이터정보과학회지 Vol.23 No.6

Cloud computing has rapidly become a new infrastructure for organizations to re-duce their capital cost in IT investment and to develop planetary-scale distributed applications. One of the fundamental challenges in geographically distributed clouds is to provide efficient algorithms for supporting inter-cloud data management and dissem-ination. In this paper, we propose a geographic group quorum system (GGQS)-based hybrid algorithm for improving the interoperability of inter-cloud in time-critical event dissemination service, such as computing policy updating, message sharing,event no-tification and so forth. The proposed algorithm first organizes these distributed clouds into a geographic group quorum overlay to support a constant event dissemination latency. Then it uses a hybrid protocol that combines geographic group-based broad-cast with quorum-based multicast. Our numerical results show that the GGQS-based hybrid algorithm improves the efficiency as compared with Chord-based, Plume and GQS-based algorithms.

정지궤도 위성을 이용한 표준시각 동기 서비스에 대한 실시간 궤도결정 기술의 적용

김방엽,이상철,김병교,Kim, Bang-Yeop,Lee, Sang-Cheol,Kim, Byeong-Gyo 통신위성우주산업연구회 2003 Joint Conference on Satellite Communications Vol.2003 No.-

본 연구에서는 정제궤도 위성을 이용한 표준시각동기 서비스에 실시간 궤도결정 기술을 적용하는 방안을 고려하였다. 정지궤도 위성을 이용하여 표준시각 동기신호를 전파하는 연구는 여러 나라에서 진행되고 있는데 3 곳에서의 측정(Trilateration)과 미분 보정(Differential Correction) 방식이 일반적인 방법으로 채택되고 있다. 본 논고에서는 한국항공우주연구원에서 진행중인 표준시각 동기 서비스 연구와 이를 위해 제작중인 실시간 궤도결정 기술을 적용한 실험 소프트웨어에 대해 소개하고자 한다. 실시간 궤도결정 방법을 적용하게 되면 동기신호 전파에 있어서 가장 큰 오차의 원인이 되는 위성궤도 예측 오차를 크게 줄일 수 있을 것으로 판단된다. 그리고 본 연구에서는 기존에 궤도 결정을 위해 사용하는 톤 레인징에 의한 위상차 신호와 안테나 각도 대신에 동기신호 자체만을 사용하고 있다. 본 논고에서는 실시간 궤도 결정에 의한 시뮬레이션 결과와 한국항공우주연구원에서 준비중인 실험에 대해서 간략히 소개한다. 그리고 본 연구에서 개발된 기술은 2004 년 4 월에 무궁화위성 2 호를 이용하여 실험을 수행할 예정이다. We examined the applying of real-time orbit determination method to time dissemination service via geostationary satellite. Actually, the geostationary satellite based time dissemination service have been researched in many countries. Also, the trilateration measuring and differential correction technique are generalized. In this paper, we are going to introduce about the time dissemination technique research in KARI. We are developing the time dissemination experiment software, and the real-time orbit determination method was adopted. We expect that the real-time orbit determination method can reduce the predicted satellite position error, which is the one of the main error reason. And we use the time dissemination signal itself as the range data. So, the additional measurements like antenna angle or phase shift of ranging tone are not need, which were measured only by the ground station of each satellite. In this paper, we will introduce the simulated output of real-time orbit determination and the concept of time dissemination service technique in KARI. The developing method will be tested via KOREASAT-2 on April, 2004.

傳播學視角下的韓國綜藝節目字幕飜譯硏究 ― 以≪尋笑人≫爲例

왕보하,두김몽 한국중국언어학회 2018 중국언어연구 Vol.0 No.74

本文從傳播學的角度,以優酷平台提供的韓國語言類?笑綜藝節目≪尋笑人≫爲例,根据可譯性障碍和時間空間限制理論,從字幕飜譯的角度探討了其在中國收視狀況不佳的原因。 綜藝節目包含各種本國文化因素,字幕如何淺顯易?地傳遞文化內容,引起觀衆的共鳴與關注,是字幕飜譯硏究領域的重要課題。本文第二部分重点論述了綜藝節目的域外傳播和字幕飜譯之間的關系,發現綜藝節目的對外輸出與傳播同字幕飜譯的質量有着不可分割的關系,同時也發現由于可譯性限制以及時空限制的存在,在進行字幕飜譯時,會遇到諸多障碍。本文第三部分以韓國?笑綜藝節目≪尋笑人≫爲例,從可譯性障碍和時空限制兩個角度,對其字幕飜譯進行了分析。指出由于語言結構文字障碍、慣用法障碍、表達法障碍及文化障碍的存在,在進行字幕飜譯時,衆多韓國語式幽默難以得到有效轉換,再加之時空限制對字幕飜譯簡潔凝練的要求,最終影響了綜藝節目的域外傳播。 希望本論文能勾爲今后字幕飜譯工作者提供一定的理論依据和借鑒,能勾爲字幕飜譯相關硏究的發展貢獻一定力量的同時,對韓國綜藝節目的對外輸出和其?國家綜藝節目的引進提供一定的參考。 This paper explores the impact of subtitle translation of Korean variety shows on dissemination abroad, takes the humorous Korean variety show ‘People Looking for a Laugh’ as an example, and probes the reasons for its the poor viewing in China in the perspective of subtitle translation based on the theories of translatable obstructions and limitation of time and space. The introduction part of the paper teases out the current situation of Korean variety shows in China and documents related to the Korean variety shows and finds out that few scholars discuss and study the dissemination abroad of variety shows in the perspective of subtitle translation. Therefore, the second part of the paper focuses on the relationship between dissemination abroad and subtitle translation of variety shows and discovers that the exports of variety shows is inextricably linked with the quality of subtitle translation and meanwhile due to translatable obstructions and limitation of time and space there will be many obstacles in subtitle translation, In consequence, the third part of the paper takes the humorous Korean variety show ‘People Looking for a Laugh’ as an example and analyses subtitle translation in the perspective of translatable obstructions and limitation of time and space. Through analysis, it is found that many Korean-style humour cannot be effectively converted during subtitle translation due to formal-structural obstruction, usage obstruction, presentation obstruction and cultural obstruction. Besides, the limitation of time and space restricts the conciseness of subtitle translation, which ultimately influences the dissemination abroad of the variety shows. Through the research on the relationship between subtitle translation and dissemination abroad of variety shows, it is hoped that this paper can provide some theoretical basis and reference for future subtitle translators and that while contributing to the development of related research on subtitle translation, this paper will provide reference for the export of Korean variety shows and the introduction of variety shows in other countries.

실 시각정보 전송을 위한 시각코드발생기 제작

김영범,박영태,이영규 한국정보통신설비학회 2007 정보통신설비학회논문지 Vol.6 No.3