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참조 지역성이 페이지 교체 성능에 미치는 영향에 대한 탐색적 연구
손창권(Chang-Gweon Son),이승기(Seung-Gi Lee),이승구(Seung-Gu Lee),김승희(Seung-Hee Kim) 한국정보기술학회 2017 한국정보기술학회논문지 Vol.15 No.9
The performance of a page replacement algorithm is affected by the reference locality and the number of page replacements. This study conducts simulation experiments in which varied the number of frames and size of page reference sequence (bundle of demand pages) in order to identify how the performance of memory replacement algorithm changes according to the level of reference locality. It was found that when the page reference sequence is random, the number of page fault in the OPT algorithm decreases by approximately 40% compared to FIFO and LRU algorithms, and when locality is high the number decreases by 47% compared to FIFO algorithm and 32% compared to LRU algorithm. This study is significant in that it provides basic information that can predict the level of change in performance when replacing pages due to the reference locality.
A Conditional Indirect Survey Method
이기성,홍기학,손창권,남기성,Lee, Gi-Sung,Hong, Ki-Hak,Son, Chang-Kyoon,Nam, Ki-Seong The Korean Data and Information Science Society 2002 한국데이터정보과학회지 Vol.13 No.1
For improving the quality of survey dat a of sensitive character, we suggest a conditional in direct survey method. In th at method, only the respondents who answer directly to the less sensitive question respond indirectly to the more sensitive one by using the one sample unrelated question randomized response technique with the known $\pi_y$, the true proportion of unrelated group Y. We extend it to two sample method when $\pi_y$ is unknown. We also consider the case that people who possess less sensitive character answer untruthfully. Finally we compare our method with the methods of Greenberg et al. and Carr et al..