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장주석 대구보건대학 1991 대구보건대학 論文集 Vol.12 No.-
In this paper, designed and implemented the integral Central Control System which controls and analyze peripheral devices and machines by means of a personal computer system and micro computer systems. Overall design structure is based on the tightly coupled multi-processor system which communictes with other processor by way of common memory, and implementing system is consisted of a IBM PC/XT computer system and constructed micro computer systems which using Z-80 cpu. On the software, we adapted Separative Executive operating system mechanism which operate independantly at each unit, and in the actual system, used MS-DOS in the IBM PC/XT(MASTER) and developed monitor program in the micro-computer systems(SLAVE). A IBM PC/XT computer system(MASTER) controls all over the SLAVE units and micro-computer system(SLAVE) controls connected outer devices and machines and sends occurred data from outers to central system and receives commands from central system. The mutual exclusion which occurs in the muti-processor system when data are communicateed with each unit by means of the common memory is resolved by the use of Dekker's Algorithm. On the result of this multiprocessor Integral. Central control system, all outer devices and machines are directly controled by the SLAVE and statistical process is resolved by the MASTER, and so this system's function would be very excellent for the integral real time processing.
장주석,박진상,지창환,정신일 대한전자공학회 1995 전자공학회논문지-A Vol.32 No.5
As a Basic study to implement a wide-band photonic switching sysetm, we proposed a scheme of free-space-division-multiplexed photonic switching based on a holographic interconnectio method and carried out simple experiments on it. First, we recorded holgraphic interconnection element array for nonblocking optical interconnections. Just a single stage of the array realizes full optical interconnections between NN${\times}$NN input prots and NN${\times}$NN output ports in 3-D space. Next, in reading of the array for optical internnections, we showed that the zeroth-order diffacted beam could be eliminated in the output port by introducing a right angle prism. The elimination of the zeroth-order diffracted beam reduces optical noise in the output ports and provides conveniences of interconnection control in our scheme. Finally, from the experiments on ON-OFF switching of the optical interconnection paths one by one using a spatial (display of the liquid crystal telecision), we showed the feasibility of photonic wsitching based on the holographic interconnection method. We also estimated approximately the maximum interconnectio scale that can be realized without difficulty with current optical devices.
Coloring기법을 이용한 향상된 5-셀 PNPSF 테스트 알고리즘
장주석,윤태진 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(A)
State-of-the-art memory chips are designed with spare rows and columns for reconfiguration purposes. After a memory chip is reconfigured, Physically adjacent cells may no longer have consecutive logical addresses. In this paper, we present new test algorithms to detect 5-cell Physical neighborhood pattern sensitive faults in dynamic RAMs, even if the logical and physical addresses are different and the physical-to-logical address mapping is not available. These algorithms have test length of O(N[log_2N][log_3N]^2) for N-bit RAMs, and also detect other faults such as stuck-at and coupling faults. The algorithms depend on the 3-coloring algorithm that trichromatically colors all the triplets among a group on n object in at most [log_3N]^2 coloring steps and 2-coloring algorithm that differently colors all the pairs among a group of n object in at most [log_2N] coloring step.
회전, 각, 그리고 공간 다중화 방법을 결합 사용하는 홀로그래픽 디스크 메모리에서의 면적저장밀도
장주석 한국광학회 2000 한국광학회지 Vol.11 No.5
디스크 형태의 저장 매체에 다중 홀로그램을 기혹함에 있어서, 우리는 저장밀도를 향상시키기 위해 회전, 각, 그리고 공간 다중화를 복합적으로 구현할 수 있는 간단하고 비용면에서 효율적인 방법을 연구한 바 있다. 회전다중과 각다중은 두 개의 쐐기 프리즘을 이용하여 기준빔을 직접 제어함으로써 얻고, 공간다중은 기록매질을 이동시킴으로써 얻었다. 본 논문에서는 저장밀도가 신호빔과 기준빔 경로상에 있는 렌즈들을 F/#(f number)와 밀접한 관계가 있으며, 그 저장밀도가 신호빔 경로상에 있는 렌즈의 F/#가 기준빔 경로에 있는 렌즈의 F/#의 약 두 배가 될 때 최대로 얻어짐을 보였다. For multi-hologram recording especially in a dIsk-shaped storage medium. we had studied a simple cost-effective method to unplement the rotational, angular, and ,patial multiplexmg techniques together in order to enhance the area storage density. Holographic storage with both rotational and angular multIplexing was realized by controlling the rderence beam directly with a pair of wedge prisms. whlie the storage WIth spatIal multlplexmg by shIfting the storage medium. In thIS paper \ve show that lhe area storage density of our system is strongly dependent on f numbers of the lenses in the srgnal and reference anns, and also show that the area storage densrly becollles maximal when the f number of the lens in the signal arm is approximately twice as long for a given f number of the lens in the reference emn. e emn.
장주석,김명원,임채덕,송윤선 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.1