• 한국정보과학회논문지:시스템및이론
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• 제31권8호
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• pp.473-486
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• 2004

NUMA 시스템은 원격의 메모리에 반복적으로 접근하는 오버헤드를 피하기 위해 지역 노드내에 원격 캐시를 둔다. 이러한 원격 캐시를 사용하여 원격 메모리로의 접근 지연 시간을 감소시키고 네트워크 상의 트래픽 양을 줄이지 못한다면 다중 프로세서 시스템의 성능 저하는 명백하다. 성능 상의 여러 기준 중에서 메모리 시스템과 관련해서는 캐시 교체 정책에 관한 연구가 계속되었고, 그 중 다중 프로세서 시스템에서의 캐시 교체 정책에 관한 연구도 이어졌다. 본 논문에서는 캐시의 공유 상태에 기반을 둔 교체 정책을 제안한다. 소유권이 없는 캐시 라인을 먼저 교체하고, 이를 통해 소유권이 옮겨지는 오버헤드를 피하여 메모리 지연 시간을 줄인다. 또한 소유권이 없는 캐시 라인에 지나친 피해가 얼도록, “MRU를 사용한 소유권 유지 교체 정책(KOM)”과 “참조 비트를 사용한 소유권 유지 교체 정책(KORB)”를 제안하고, 이를 LRU, Pseudo LRU(PLRU)와 비교한다. KOM과 KORB는 PLRU에 비하여 수행 시간에서 25%, 13%씩 각각 향상을 보였다. 특히 KOM은 하드웨어 복잡도가 현저히 낮음에도 불구하고 LRU에 가까운 성능을 나타냈다.

• Journal of Construction Engineering and Project Management
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• 제6권1호
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• pp.1-10
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• 2016

Issues in the construction industry of Cambodia in ASEAN Economic Community (AEC) is the main priority to be identified before identifying causing factors in order to find out recommendations, to improve this sector, and to survive in this community. Two major issues were identified from the literature review and the investigation, namely i) Long-term vision and its policy, and ii) practice culture. The total sample collected from concerned government officers and engineers in Cambodia were 463. Factor analysis was then conducted to find out the issues, and as the results, there are five issues in two main groups: (i) the Organization's vision and its skill, which consist of a vision of the organization, knowledge and skill, and less investmen in the construction sector; (ii) Knowledge and motivation towards the AEC, which consist of knowledge about the AEC, and level to promote organization for the AEC.

• 유통과학연구
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• 제20권3호
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• pp.23-31
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• 2022

Purpose: The purpose of this study is to analyze the Safety and Logistical Distribution Management system in Thailand's Highway Work Zone based on data from Logistics drivers. Accidents in highway construction zones have caused enormous casualties in Thailand yearly. Statistical data shows evidence of correlation between numbers of accidents and drivers' recklessness. Research design, data, and methodology: In this study, we conducted an in- depth interview with 414 logistics drivers and highway construction workers in Khon Kaen province, Thailand. The data was collected based on 63 questionnaires aiming at capturing factors contributing to the risk of safety and cause of accidents in logistic infrastructures such as Highway work zone. Results: The result reveals two significant factors affecting safety in highway work zone, which includes construction environment and safety management system. Moreover, the result shows that feeling of afraid and confused while driving within the construction zones significantly affecting driver's risk of having an accident. Conclusions: The findings of this study offer that a strategic planning and evaluation of the logistics drivers' satisfaction and construction workers' participation to mitigate highway accidents at construction zones and that drivers' knowledge and perception toward construction safety management plays a significant role in preventing highway accidents at the construction areas.