http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
DVD 쥬크박스 기반의 계층적 VOD 서버 구성을 위한 파이프라인 로딩 기법
최황규 한국컴퓨터산업학회 2002 컴퓨터産業敎育學會論文誌 Vol.3 No.3
In order to realize a practical VOD system, it is necessary for a high-capacity and cost-effective hierarchical VOD server based on tertiary storages such as DVD jukebox. In such a system, it is possible to transfer multiple streams to users by alternatively swapping DVDs using the fixed number of drives. But it takes a long time for loading DVD to a drive. In this paper, we propose a primitive pipelined loading mechanism for hiding the loading time to swap DVDs in a hierarchical VOD server based on DVD jukebox. We also propose a enhanced pipelined loading mechanism for increasing the maximum admittable streams with the fixed number of drives. The enhanced mechanism caches the initial segment of each stream on a disk storage allowing faster data transfer. The performance analysis shows that the proposed mechanisms can admit the maximum allowed stream capacity under the fixed number of disk drives. 최근 관심을 끌고 있는 VOD 시스템을 현실적으로 실현 가능하게 하기 위해서는 대용량 멀티미디어 정보를 장기적으로 저장할 수 있도록 저가이면서 저장 용량이 큰 3차 저장장치를 사용하는 계층적 VOD 서버를 필요로 한다. 본 논문은 이러한 계층적 VOD 서버를 저가의 대용량 DVD 쥬크박스를 온라인 저장장치로 사용하여 구성하고, 여러 개의 스트림들을 적당한 시간을 주기로 드라이브들을 교대로 활용하게 함으로써 서비스 스트림을 최대화함으로써 효율을 높일 수 있다. 그러나 DVD 쥬크박스 내에서 하나의 스트림이 저장된 DVD-ROM의 교환은 상대적으로 긴 시간을 요구하므로 본 논문에서는 DVD 쥬크박스를 기반으로 한 VOD 서버에서 DVD-ROM의 교환시간을 은폐하면서 효율적인 데이터 전송을 지원 할 수 있는 파이프라인 로딩 기법을 제안한다. 또한 디스크를 캐쉬로 사용하여 스트림의 초기 일부분을 미리 디스크 캐쉬에 적재하여 놓음으로써 최대허용 스트림 수를 증가시킬 수 있는 기법을 제안한다. 제안된 기법들은 시뮬레이션 성능분석을 통하여 파이프라인 상황하에서 사용하는 드라이브 수에 비하여 최대 허용 스트림 수가 크게 증가될 수 있음을 보인다.
병원의 관리개선을 위한 원가개념의 도입과 원가분석전산시스템의 효과분석 : K대학병원의 원가분석시스템을 중심으로
최황규,이열원,윤덕보,오건영,정수경 한국병원경영학회 1996 병원경영학회지 Vol.1 No.1
Some of the large sized companies have taken parts in a hospital business with a view or justification to improve medical care regadless of the disadvantageous fee-for-service medical insurance reimbursement system controlled by authorities related. This gradually brought about the financial difficulties to university hospitals as well as general hospitals that were less competitive. In this circumstance the hospital administrators are called for preparing and implementing proper financial strategies by analyzing external circumstances and internal abilities of their hospitals. In this aspect, an effective cost-analysis system in the hospital has been needed for years. K-University hospital developed the practical cost-analysis system and applied it to the hospital management. The effects of const analysis system are as belows : first, the trend of the monthly revenue per medical specialist from March to July in 1996 showed increasing pattern which is different from that in past years. second, it turned out that the department of functional laboratory in relation to medical treatment enlarged the medical revenue very sharply. third, the intensive care units were being operated at the state of deficit, while other general wards were lucrative.
인터넷상에서 실시간 MPEG 비디오/오디오 및 텍스트 캡션 기능을 제공하는 VOD 시스템의 설계 및 구현
김영진,김근혜,최황규 강원대학교 정보통신연구소 1999 정보통신논문지 Vol.3 No.-
In this paper, we present the design and implementation of an Internet-based VOD system. The system can play the MPEG video/audio and text captions on the Internet environment is real time. The software feedback mechanism is adopted for client/server synchronization, QoS control, and system adaptiveness. Currently, our system is well running on the Internet environment in real time.
데이터 편재 하에서 히스토그램 변환 기법에 기초한 효율적인 병렬 결합 알고리즘
박웅규,최황규 江原大學校 産業技術硏究所 1995 産業技術硏究 Vol.15 No.-
본 논문에서는 데이터 분포가 편재된 상황하에서 부하의 불균형과 버켓 오벌플로우 문제를 해결하기 위해 히스토그램 변환 기법을 이용한 데이터 분산 방법과 이를 기초로한 병렬 결합 알고리즘을 제안한다. 제안된 알고리즘의 성능은 시뮬레이션과 하이퍼큐브형 병렬 컴퓨터 상에서 실험적인 방법에 의하여 분석되었다. 그 결과 제안된 알고리즘이 기본의 해쉬 결합 방법보다 우수함을 보인다.
최황규 ( Hwang Gyu Choi ),황인경 ( In Kyoung Hwang ) 한국병원경영학회 2006 병원경영학회지 Vol.11 No.3
This study aims at providing necessary informations for management decision-making to the hospital manager, such as ratios of fixed and variable cost to total operating expense, and variable cost ratio to operating revenues, and determinant factors affecting cost behavior. A study model and related hypotheses were established, data were collected from 41 private university hospitals for the 6years from 1998 to 2003, and regression analyses were performed to test the hypotheses. The results of the analyses and conclusions are as follows; First, labor cost and administration cost within the same number of beds have not only fixed quality of the cost, but variable quality of that. Also, the ratio of the variable costs to operating revenue of the metropolitan was estimated 76.9% and that of other area hospitals was 80.1%. Second, the major factors affecting the increase rate of the operating expense were the increase rates of the number of inpatients, the number of employee, and the number of hospital operating bed. This result implies that maintaining a optimal hospital bed size and efficient operation of the beds are important strategic factors of hospital management.
RAID5에서 작은 쓰기 문제 해결을 위한 압축 패리티 로깅 기법
최황규,김근혜 강원대학교 정보통신연구소 1999 정보통신논문지 Vol.3 No.-
The parity logging technique is an efficient solution to the small write problem in redundant disk arrays based on a distributed log. However, the parity logging requires a large amount of the fault tolerant buffers and has an overhead of rapidly increasing the parity log regions. In this paper, we propose an improved parity logging technique which can reduce the overhead of the original one. The proposed technique uses the simple data compression method to reduce the size of the parity update images and then reduces the size of log regions. As a result, the proposed technique can reduce the overall disk access time. In the performance study, we conduct the simulation experiment in order to observe the disk access time and then we show that our technique outperforms the original parity logging.
ATM네트윅과의 접속을 위한 MAN을 이용한 사용자 - 망 인터페이스 설계
최황규,최경,서주하,김화종,이상희 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-
In this paper the functional requirements of a B-ISDN access network based on MAN are investigated . Firstly, criteria of designing access network for the B-ISDN is studied. Secondly, the types of subscribers and their service requirements are defined. Thirdly, various artchitectures of CPNs(Customer Premises Networks) are considered and their characteristics are studied, Finally, the interworking funtions of a DQDB MAN as an access network are investigated.
실시간 멀티미디어 저장 서버에서 초기 지연시간 최소화를 위한 동적 스트림 합병 기법
최황규,김근혜 강원대학교 정보통신연구소 2000 정보통신논문지 Vol.4 No.-
A multimedia storage server neeeds to provide high bandwidth and continuous teal-time delivery. In this paper, we propose a dynamic stream merging technique for reducing the initial latency time in such multimedia storage servers. The proposed technique allows clients to merge streams on request as long as their requests fall within the reasonable time interval. The basic idea behind the dynamic stream merging technique is to merge multiple streams into one by changing frame rates of each stream. In theperformance study, the proposed technique can reduce the initial latency time under the minimum memory use.