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건성안에서 결막 압흔세포검사를 이용한 비타민 A 함유 누액의 치료효과의 평가
김은철,주천기,Efficacy of Vitamin A-containing Lubricant in Dry Eye Syndrome 대한안과학회 2008 대한안과학회지 Vol.49 No.11
Purpose: To evaluate the therapeutic effect of topical vitamin A-containing lubricant in dry eye patients. Methods: Three hundred eyes of 150 patients with dry eye (Schirmer I test≤10 mm, BUT≤10 seconds) were divided into three groups. Preservative-containing artificial tears, preservative-free artificial tears, and vitamin A-containing lubricant were administrated to Groups 1, 2, and 3, respectively (N=50). We evaluated and checked symptom scores, tear film breakup time (tBUT), Schirmer I test results, corneal fluorescein stain scores, and impression cytology immediately and at 1, 2, and 3 months after treatment. Results: Mean tBUT and goblet cell density significantly increased from 5.06±1.25 to 6.76±1.21 sec and from 125.62±61.52 to 192.86±69.38 cell/mm2, respectively, after 2 months in group 3 (P<0.05). Impression cytology grade significantly decreased from 2.14±0.38 to 1.67±0.41 after 2 months in group 3 (P<0.05). The Schirmer I test score significantly increased from 9.12±4.15 to 12.83±0.96 mm, and the corneal stain score decreased from 2.13±0.95 to 1.18±0.68 after 3 months in group 3 (P<0.05). Conclusions: The improvement of symptoms and the stabilization of tear films and ocular surfaces suggested that treatment with vitamin A-containing lubricant for dry eye was effective. J Korean Ophthalmol Soc 2008;49(11):1729-1736
망막중심정맥폐쇄환자에서 황반부종에 대한 유리체내 트리암시놀론주입술의 효과
강수연,최문정,유수진,이태곤,김순현,Myung-Gok Eye Research Institute,Department of Ophthalmology,Konyang University,Kim`s Eye Hospital,Seoul,Korea Nune Eye Hospital,Seoul,Korea 대한안과학회 2007 대한안과학회지 Vol.48 No.9
Purpose: To investigate the effect of intravitreal injection of triamcinolone acetonide (IVTA) for the treatment of macular edema in central retinal vein occlusion (CRVO). Methods: Seventy patients with CRVO and persistent macular edema were included in this retrospective study. Thirty-six eyes of 36 patients received an intravitreal injection of 4 mg (0.1 cc) triamcinolone and 34 eyes of 34 control patients didnot receive an injection. Any differences in visual acuity and foveal thickness were measured and compared between the two groups. The correlation between the change in foveal thickness and visual acuity was also evaluated. Results: In ischemic CRVO group, the mean difference of visual acuity between the injection and the control groups was not statistically significant (p<0.05) at the initial measurement and at one week, one, three, and six months after the injection. However, in the non-ischemic CRVO group it was not clinically significant (p<0.05) at the initial time, one week or six months after the injection. But it was clinically significant at one months and three months after receiving the injection (p=0.004 and 0.001). The mean difference in foveal thickness was clinically significant (p<0.001). The visual acuity and foveal thickness were correlated in non-ischemic group but not in the ischemic group. Conclusions: The IVTA appears to be an effective treatment in patients with macular edema associated with CRVO. The visual acuity of patients with non-ischemic CRVO improved temporally after the IVTA injection, but there was no significant improvement in ischemic CRVO group.
Hardware Platforms for Flash Memory/NVRAM Software Development
Eyee Hyun Nam,Ki Seok Choi,Jin-yong Choi,Hang Jun Min,Sang Lyul Min 한국정보과학회 2009 Journal of Computing Science and Engineering Vol.3 No.3
Flash memory is increasingly being used in a wide range of storage applications because of its low power consumption, low access latency, small form factor, and high shock resistance. However, the current platforms for flash memory software development do not meet the everincreasing requirements of flash memory applications. This paper presents three different hardware platforms for flash memory/NVRAM (non-volatile RAM) software development that overcome the limitations of the current platforms. The three platforms target different types of host system and provide various features that facilitate the development and verification of flash memory/NVRAM software. In this paper, we also demonstrate the usefulness of the three platforms by implementing three different types of storage system (one for each platform) based on them.
Hardware Platforms for Flash Memory/NVRAM Software Development
Nam, Eyee-Hyun,Choi, Ki-Seok,Choi, Jin-Yong,Min, Hang-Jun,Min, Sang-Lyul Korean Institute of Information Scientists and Eng 2009 Journal of Computing Science and Engineering Vol.3 No.3
Flash memory is increasingly being used in a wide range of storage applications because of its low power consumption, low access latency, small form factor, and high shock resistance. However, the current platforms for flash memory software development do not meet the ever-increasing requirements of flash memory applications. This paper presents three different hardware platforms for flash memory/NVRAM (non-volatile RAM) software development that overcome the limitations of the current platforms. The three platforms target different types of host system and provide various features that facilitate the development and verification of flash memory/NVRAM software. In this paper, we also demonstrate the usefulness of the three platforms by implementing three different types of storage system (one for each platform) based on them.
ANALYSIS OF AN MMPP/G/1/K FINITE QUEUE WITH TWO-LEVEL THRESHOLD OVERLOAD CONTROL
Lee, Eye-Min,Jeon, Jong-Woo Korean Mathematical Society 1999 대한수학회논문집 Vol.14 No.4
We consider an MMPP/G/1/K finite queue with two-level threshold overload control. This model has frequently arisen in the design of the integrated communication systems which support a wide range applications having various Quality of Service(QoS) requirements. Through the supplementary variable method, se derive the queue length distribution.
HIL : A Framework for Compositional FTL Development and Provably-Correct Crash Recovery
Choi, Jin-Yong,Nam, Eyee Hyun,Seong, Yoon Jae,Yoon, Jin Hyuk,Lee, Sookwan,Kim, Hong Seok,Park, Jeongsu,Woo, Yeong-Jae,Lee, Sheayun,Min, Sang Lyul Association for Computing Machinery 2018 ACM transactions on storage Vol.14 No.4
P-BMS : A Bad Block Management Scheme in Parallelized Flash Memory Storage Devices
Kim, Hong Seok,Nam, Eyee Hyun,Yun, Ji Hyuck,Lee, Sheayun,Min, Sang Lyul Association for Computing Machinery 2017 ACM transactions on embedded computing systems Vol.16 No.s5
<P>Flash memory is used as a main data storage medium in increasingly large areas of applications, rapidly replacing hard disk drives because of its low power consumption, fast random access, and high shock resistance. Such flash-based storage devices generally incorporate multiple flash memory chips to meet the ever growing capacity demands. Using multiple chips in a single storage device, at the same time, opens an opportunity to boost the performance based on multi-unit parallelism. However, parallel execution of multiple flash operations introduces complications when bad blocks occur, which is unavoidable due to flash memory's physical characteristics. The situation gets even worse when bad block occurrences are accompanied by sudden power failures. We propose a bad block management scheme called P-BMS that can fully utilize flash-level parallelism, while guaranteeing provably correct block replacement. Experiments show that our P-BMS achieves a throughput that is more than 95% of the maximum bandwidth of the flash controller, even with bad block occurrences far heavier than in real flash memory.</P>