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NVMe 드라이버 구현 방식에 따른 I/O 응답시간 분석
강인구,주용수,임성수,Kang, Ingu,Joo, Yongsoo,Lim, Sung-Soo 대한임베디드공학회 2017 대한임베디드공학회논문지 Vol.12 No.3
In recent years, non-volatile memory express (NVMe), a new host controller interface standard, has been adapted to overcome performance bottlenecks caused by the acceleration of solid state drives (SSD). Recently, performance breakthrough cases over AHCI based SATA SSDs by adapting NVMe based PCI Express (PCIe) SSD to servers and PCs have been reported. Furthermore, replacing legacy eMMC-flash storage with NVMe based storage is also considered for next generation of mobile devices such as smartphones. The Linux kernel includes drivers for NVMe support, and as the kernel version increases, the implementation of the NVMe driver code has changed. However, mobile devices are often equipped with older versions of Android operating systems (OSes), where the newest features of NVMe drivers are not available. Therefore, different features of different NVMe driver implementations are not well evaluated on Android OSes. In this paper, we analyze the response time of the NVMe driver for various Linux kernel version.
만성 간질환 환자에서 상부위장관 증상을 수반한 위내용물 배출시간 지연에 대한 Cisapride 치료 효과에 관한 연구
강인구,이종철 대한소화기학회 1992 대한소화기학회지 Vol.24 No.5
It was documented in our previous studies that chronic hepatitis patients with disfunctional upper gastrointestinal symptoms were delayed in their gastric emptying than normal control group. Sixteen patients with chronic hepatitis participated in our clinical trial to assess the effect of cisapride on gastric emptying atd dysfunctional upper gastrointestinal symptoms such as recurrent nausea, vomiting, poatprandial fullness, anorexia, weight loss and something like that. They were each given cisapride 5 mg t.i.d. for 2 to 3 months. The results were as following: The patients with chronic liver disease with delayed GET participated in our study were 16 in number composed of ehronic active hepatitis 2, chronic persistent hepatitis 13, early liver cirrhosis 1, The GET of 16 patients with chronic liver disease was dealyed significantly in comparison with that of the normal control group (160±63. 3 vs 89.4±5.9; p$lt;0.05). Follow-up GET of these patients after cisapride administration was 114. 1±34.4 minutes and it was statistically different from initial GET. Cisapride also significantly improved dysfunctional gastrointestinal symptoms (6.82±2.56 vs 2.75±2.41; p$lt;0.05). Only one side effect observed during cisapride treatment was skin rash with itching sensation but it disappeared soon after stop of the medication. No other significant side effects were noted.
강인구,이봉훈 한국기술사회 1983 技術士 Vol.16 No.1
Building management cost increases enormously as modern buildings become complicated. Lost of building eveners or managers feel the need to cut down the cost not sacrifying Comfort building environment and building safety, The ways to achieve such goal are maintaing with a few person, proper HVAC scheduling to save energy BAS's i.e the building automation system or building maintenance system, are designed to meet the goal. In korea, imported BAS's have been installed past several years. Difficulties arised in several aspects. One is extra high cost in installing BAS's because of marginal coat. Another is long settling time because it is originated from abroad. GSC/85/30 is the first trial as a korean BAS to minimize such difficulties. Even though it is a primitive system, it is a mileston of korean BAS the technics gained from developing GSCI/85/30 can be utilized to develop higher version and is now. As modern buildings become more complicated and hugy, managers owner of buildings seek for the system to manage building properly. BAS(Building Automation System or Building management system) is designed to meet the need.