http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Melhem, Jamal Masad (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
-
Baek, Seungjae,Sangyeun Cho,Melhem, Rami IEEE 2014 IEEE Transactions on Computers Vol.63 No.12
<P>DRAM stores information in electric charge. Because DRAM cells lose stored charge over time due to leakage, they have to be “refreshed” in a periodic manner to retain the stored information. This refresh activity is a source of increased energy consumption as the DRAM density grows. It also incurs nontrivial performance loss due to the unavailability of memory arrays during refresh. This paper first presents a comprehensive measurement-based characterization study of the cell-level data retention behavior of modern low-power DRAM chips. About 99.7% of the cells could retain the stored information for longer than 1 s at a high temperature. This average cell retention behavior strongly indicates that we can deeply reduce the energy and performance penalty of DRAM refreshing with proper system support. The second part of this paper, accordingly, develops two practical techniques to reduce the frequency of DRAM refresh operations by excluding a few leaky memory cells from use and by skipping refreshing of unused DRAM regions. We have implemented the proposed techniques completely in the Linux OS for experimentation, and measured performance improvement of up to 17.2% with the refresh operation reduction of 93.8% on smartphone like low-power platforms.</P>
-
Amrani, Iman,Bulatova, Nailya,Awidi, Abdalla,Yousef, Al-Motassem,Melhem, Jamal Masad,Al-Masri, Mahmoud,Tahoun, Laila Abu Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.1
Background: CYP1A1 is a candidate gene for low-penetrance breast cancer susceptibility, as it plays an important role in the metabolism of carcinogens and estrogens. Purpose: The objective of this study was to assess the association between M2 (A2455G, Ile462Val) and M4 (C2453A, Thr461Asn) polymorphisms in CYP1A1 and breast cancer risk among Jordanian women and in subgroups stratified by menopausal status and smoking history. Materials and Methods: Blood samples were collected from 112 breast cancer female patients and 115 age-matched controls who underwent breast cancer screening with imaging and showed negative results (BI-RADS I or BI-RADS II). Genotyping was performed using the PCR-RFLP technique. Results: No statistically significant overall association was found between breast cancer risk and CYP1A1 M2 genotypes (p= 0.55; OR = 0.77; 95% CI= 0.32 - 1.83) nor with the M4 polymorphism (p= 0.95; OR= 0.95; 95% CI= 0.51 - 1.88). Analysis of subgroups defined by menopausal status or smoking history also revealed no association with these polymorphisms. Furthermore, the four identified haplotypes (AC; AA; GC and GA) were equally distributed among cases and controls, and haplotype analysis showed a strong linkage disequilibrium of both studied loci in either cases or controls (D'=1). Conclusions: Based on the study results, CYP1A1 M2 and M4 polymorphisms do not seem to play a major role in breast cancer risk among Jordanian females.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
