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Tagged Token Data-Flow Computer 構造에서 直接配列 呼出法에 關한 硏究
이용두 대구대학교 (한사대학) 산업기술연구소 1991 産業技術硏究 Vol.10 No.-
The data-flow computer model of computation has been proposed as an alternative tc the conventional von Neumann principles of excution. Data-flow principles of excution offer an efficient way of scheduling operations in large-scale distributed multicomputer systems. Large data structures are, however, a notorious difficulty and require special handing. The indirect structure access made through a structure memory has been adopted in some proposed data-flow machines. In this paper, we present a direct structure access approach in which all array operations can be performed constructs for both approaches are described. Bitonic sort (BST) numerical algorithm has been implemented in both approaches. Token relabeling is directly applicable to arrays which are entirely consumed. We have also designed graph constructs which allow partial consumption. The effectiveness and efficiency of the feasibility and applocability of the token relabeling scheme. A deterministic simulation of Arvind's tagged token data-flow architecture has been undertaken to validate the graph designs and evaluate the performance of the graphs.
이완 결합형 다중 프로세서 시스템을 사용한 데이터 플로우 컴퓨터 구조의 병렬 에뮬레이션에 관 한 연구
이용두,채수환 한국통신학회 1993 韓國通信學會論文誌 Vol.18 No.12
노이만 계산 모델의 병렬처리 구조는 구조 속성상의 취약성으로 인해 대량 병렬처리 구조로서는 한계가 있다. 데이터 플로우 계상 모델은 소프트웨어적 고 프로그램성과 하드웨어적 높은 개발 가능성을 갖고 있다. 그러나 실제 데이터 플로우 구조에서는 프로그래밍과 실험을 행하고자 할때, 노이만 방식의 기계는 많지만 실제 데이터 플로우 컴퓨터가 없으므로 대단히 어렵다. 본 논문에서는 일반적 재래 병렬처리기계중 하나인 이완결합 다중프로세서 시스템위에서 데이터 플로우 방식의 계산을 수행시킬 수 있는 프로그래밍 환경을 제시하였다. 에뮬레이터는 iPSC/2 하이퍼 큐프를 이용하여 Tagged Token 데이터 플로우 구조를 구축하였다. 본 에뮬레이터는 iPSC/2시스템에서 소프트웨어적 박층 실험으로 프로그래머의 입장에서는 iPSC/2 시스템이 데이터 플로우 주고로서 농작하는 것으로 간주한다. 여러 가지 수치 혹은 비수치 알고리즘을 데이터 플로우 어셈블리어로 구현하여 재래식 C 언어에 의한 것과 프로그램의 성능을 비교하였다. 이로써, 재래식 병렬처리 기계상의 에뮬레이터를 통한 실험적 데이터 플로우 계산을 행할 때 이 프로그래밍 환경의 효율성에 대하여도 검정하였다. Parallel architecture based on the von Neumann computation model has a limitation as a massively parallel architecture due to its inherent drawback of architectural features. The data-flow model of computation has a high programmability in software perspective and high scalability in hardware perspective. However, the practical programming and experimentaion of date-flow architectures are hardly available due to the absence of practical data-flow, we present a programming environment for performing the data-flow computation on conventional parallel machines in general, loosely compled multiprocessor system in particular. We build an emulator for tagged token data-flow architecture on the iPSC/2 hypercube, a loosely coupled multiprocessor system. The emulator is a shallow layer of software executing on an iPSC/2 system, and thus makes the iPSC/2 system work as a data-flow architecture from the programmer`s viewpoint. We implement various numerical and non-numerical algorithm in a data-flow assembler language, and then compare the performance of the program with those of the versions of conventional C language, Consequently, We verify the effectiveness of this programming environment based on the emulator in experimenting the data-flow computation on a conventional parallel machine.
이용두,허목 제주대학교 환경연구소 1995 환경연구논문집 : 제주대 Vol.3 No.1
With the increased awareness of the impact of c.lhinated crganics in sewage effluent on reoeiving waters, the trend toward mverting wastewater disinfectrm to Ultraviolet systems is expanding Ultraviolet Disinfection system have many merits At examples no addition of chemicals and no effect on air or aquatic life. So that, in this pilot study was conducred at the Cheju and Suyeong Sewage Fanility to investigate the use of ultradet radiah for disinfectbn of the hated wastewater. The mainly objectives of these tests are to find out effidency by operating factors and water qualities. As a results, When SS of effluents were 3~6㎎/l, effiaenaes were always over 99%. And also, when HRTs were 11-146 sec, efficiencies were usually over 99 %.