다중 쓰레드 기반의 병렬처리서버용 안티바이러스 엔진

유주영;김미애;박은옥;박유미;최주영;최은정;김명주 서울여자대학교 컴퓨터과학연구소 2004 정보기술논문지 Vol.2 No.-

악성코드에 대한 보다 바람직한 예방은 클라이언트측이 아닌 서버측에서 이루어지는 것이다. 본 논문에서는 새로운 개념 의 서버용 안티바이러스 엔진인 SAVE 1.0을 설계 구현하여 제시한다. SAVE는 기본적으로 1개의 AV모니터와 다수의 AV에이전트로 구성되어 있는데 다중 CPU를 장착한 병렬처리서버의 특징을 직접 활용하기 위하여 관리자가 다중쓰레드 기법을 직접 지정할 수 있도록 하고 있다 악성코드를 5가지 부류로 구분하여 바이러스 시그너쳐 DB를 구축 제공함으로써 부류별 진단을 지정할 수 있도록 하고 있으며 실시간 네트워크 패킷 검사를 통한 악성코드 유입 점검 기능도 제공한다. 웹 기반의 관리자 인터페이스는 뛰어난 사용자 편의성을 제공하고 있다. 성능실험결과 악성코드 검색율은 국내외 상용제품과 비교해서 매우 우수한 것으로 나타났으며 검색속도에 있어서도 서버의 CPU 수 증가에 거의 선형 비례하여 향상되는 특징을 보이고 있다. It is more desirable to prevent and detect the malicious codes in server system rather than in client PCs. In this paper, we suggest a new anti-virus engine, SAVE 1.0, which is executed on a parallel processing server. SAVE consists of 1 AV monitor and several AV agents. A system administrator can control the degree of multi-thread directly in order to enhance the utilization of parallel processing servers. Virus signature DBs in SAVE are classified into 5 categories, which support system administrator's options to use the classifier or not. By real-time checking of network packets, the influx of malicious codes can be prevented. Web-based GUI is one of the convenient functions provided in SAVE. In performance tests, we have confirmed that SAVE has higher virus detection ratio than any other AV engine, and SAVE has a desirable feature as an software of parallel processing servers since the performance of SAVE is improved almost linearly as the CPUs in a parallel processing server increases.

p-형 Si(100) 기판 위에 성장시킨 Bi_(3.25)La_(0.75)Ti₃O_(12) (BLT) 박막의 전기적 특성

최은경,박문흠,김현주,하태곤,강민주,김상수 昌原大學校 基礎科學硏究所 2003 基礎科學硏究所論文集 Vol.15 No.-

Bi₃zsLa(0.75)Ti₃0_(12) (BLT) thin film have been grown on p-type Si(l00) substrates by a sol-gel spin coating process. The structure and surface morphology of the film were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEMI. Furthermore, the electrical properties were examined by capacitance-voltage ( C-V) characteristics by using a LF Impedance Analyzer(HP 4192A). XRD measurement show layered perovskite structure with a single phase in BLT thin film annealed at 700C for 30 min in oxygen. The measured grain size of BLT on Si is about 0.04 - 0.1 pn. From the cross-sectional SEM image, BLT film thickness is measured to be 0.4 pm. The C-V characteristic hysteresis curves show that the NIFS (metal-fexroelectric-semiconductor) structure has memory effect. The memory window decreases, with increasing frequency at MFS structure. And it is found that the memory window increases as the applied voltage to the ferroelectric capacitor is increased. These phenomena may be due to polarization reversals of the BLT ferroelectric film and because of the charge injection from Si substrate into the ferroelectric thin film. The results obtained indicate that the present BLT films are suitable for making ferroelectric field effect transistor(FeFET) memory.

方向분산성이 고려된 海浜流 流動特性에 관한 연구

최은주,유수진,권정곤 부산대학교 환경문제연구소 1994 環境硏究報 Vol.12 No.-

This study was managed to develope the existing numerical calculation model of near shore current and wave fields where wave and current coexist around shallow water region, and analyse their problems. Until now, nearshore current model that include longshore current and on-off shore current had shown wave characteristic based on regular wave theory. In this study, however, nearshore current characteristic was changed by directional dispersion. So the effect of directional dispersion of multidirectional irregular wave was examined numerically by the basic study of nearshore current calculation due to multidirectional wave that was driving force of pollutant material at shallow water region.

튀김 기름의 저장 기간에 따른 향신료 및 허브류 첨가에 의한 항산화 효과 `

최은미,윤혜경,윤기주,구성자 동아시아식생활학회 2000 동아시아식생활학회지 Vol.10 No.4

The effect of heated oil on human nutrition has recently become of great interest to nutritionists and food chemists, However, the detrimental effect of heated oil has been hardly studied extensively and many problems have still remained unsolved. This study was carried out to investigate the storage stability of the heated oils at room temperature (25±5℃), with the variation in storage conditions (addition of spices and herbs) for 7 weeks period. The rancidity of the oils according to storage time and condition was measured and compared with TBA, ferric thiocyanate, and DPPH method. For fresh oil, when stored for 7 weeks at room temperature, there was no significant change in the degree of oxidation. But for the heated oil with frying materials, the degree of oxidation significantly increased at 5 weeks(p<0.05), When stored with spices and herbs, the degree of oxidation significantly decreased with storage period(p<0,05), Antioxidative activity of herbs, especially sage group was higher than that of any other group.

경직성 뇌성마비아동의 도형-배경 색상역전과 시지각 및 시각-운동 수행능력

최은주,안병즙 大邱大學校 再活科學硏究所 1993 再活科學硏究 Vol.11 No.1

The present study was designed to investigate the effect of color reversal of figure-ground on visual perceptional and visuo-motor performance of cerebral palsied. The 20 spastic cerebral palsied and the 20 non-cerebral palsied children participated in the study as subjects. Perceptual subtest of perceptuo-Motor Development Diagnostic Test(PMDT) and Beery-Buktenica Development Test of Visual-Motor Intergration(VMI) were administered to assess visual perceptual and visuo-motor performance, respectively. The main conclusions from the study were as follows. First, the cerebral palsied subjects performed more poorly in both visual perceptional and in visuo-motor tasks than non-cerebral palsied counterparts. However, it was revealed that the relatively poor performance of the former in visual perceptual tasks were primarily due to Synthesis of Figure factor. Second, for spastic cerebral palsied subjects, the color reversal of testing materials had the facilitating effect on visual perception but not on visuo-motor. However, any improvement as a function of color reversal was evidenced neither in visual perceptioanl nor in visuo-motor performance of the non-cerebral palsied. Finally, presentation order did not produce significant improvement of visual perceptional and visuo-motor performance in either group. It suggest thath improvement by color reversal did not result from presentation order.

Isoquinolinium Chlorochromate와 Quinolinium Chlorochromate를 이용한 알코올류의 선택적 산화반응

최선도,박영조,이은주 三陟大學校 産業科學技術硏究所 2003 産業科學技術硏究論文集 Vol.8 No.2

Isoquinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) and quinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) were synthesized. which were used to oxidize benzylic alcohol, allylic alcohol. primary alcohol and secondary alcohols in DMF to give aldehyde of each compound. Their structures were verified by IR, EA and ICP. The oxidation of alcohols was examined by isoquinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) and quinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) in DMF. As a result, isoquinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) and quinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) were found as efficicent oxidizing agents that converted benzylic alcohol, allylic alcohol, primary alcohol and secondary alcohols to the corresponding aldehydes or ketones. The selective oxidation of alcohols was also examined by isoquinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) and quinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) in DMF. isoquinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) and quinolinium chlorochromate(C_(9)H_(7)NHCrO₃Cl) were selective oxidizing agents of benzylic alcohol. allylic alcohol and primary alcohol in the presence of secondary alcohols.

요통 환자에서 요통 및 방사통과 요추 자기공명영상의 이상소견에 대한 Tree모형의 활용

최영칠,손은주,이태용 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

To detect the MRI findings related to The low back pain and sciatica according to age group, authors used tree model analysis of 80 patient's grading their low back pain and sciatica, with their lumbar MRI findings. And the results were as follows: 1. In teens and twenties(n=22), the low back pain was related to high maximum of spinal canal narrowing and large sum of disc degeneration, and the sciatica was related to the psoas spine ratio. 2. In thirties and forties(n=33), the sum of disc degeneration, the sum of foraminal narrowing, the maximum of disc degeneration affected the low back pain, and the sum of disc degeneration, disc herniation and maximum of canal narrowing were related to sciatica. 3. In fifties and sixties(n=23) the low back pain was related to large sum of foraminal narrowing and small psoas spine ratio, and thesciatica was largely affected by high maximum of foraminal narrowing and some by large sum of canal narrowing and large sum of disc degeneration.

Bromobenzene에 유도된 간 독성에 미치는 Scoparone의 효과(Ⅱ)

최종원,김은주 慶星大學校 環境問題硏究所 1992 環境硏報 Vol.2 No.1

Brcmobenzene 투여로 야기되는 간독성의 경감에 scoparone 이 관여하는가를 간찰할 목적으로 간 조직중과산화 지질생성, 혈액증 생화확 검사 및 형채학적 측면에서 비교 관찰하여 다음과 같은 결과를 얻었다. 급성독성 시험에서 bromobenzene(1,000㎎/㎏)을 복강내에 주사하였을 때 사망률이 현저히 증가되던 것이 scoparone(5㎎/㎏)을 전처리함으로 대조군 수준으로 감소되었다. 간 조직증 과산화 지질함량도 bromobenzene(310㎎/㎏) 투여로 현저히 증가되던 것이scoparone, scopoletin 전처리로 억제되었으며, 혈청증 aminotransferase 와so-rbitol dehydrogenase 활성 변동에서도 지질과산화 생성과 유사한 결과이었다. 형채학적 검사에서bromobenzene의 투여로 간괴사, 세포의 파괴등의 변화가 scoparone, scopoletin 투여로 정상적인 세포가 형성되었으나, esculetin의 전처리로는 bromobenzene에 의한 간조직 병변의 변화에 아무런 영향을 미치지 않았다. Scoparone is derivatives of coumarin and the hydrogen of 6 and 7 position of coumarin moeity was substituted by methoxy groups. We have studied the mechanism by examing the protective effect of scoparone on the brom obenzene-induced hepatotoxicity. Scoparone poretreatment before the administration of bromobenzene has blocked subsequent increase in liver to body weight ratio. When biological changes were measured, scoparone and scopoletin protects against bromobenzene inducible hepatotoxicity in rats as evidenced by the decreased formation of lipid peroxide, lowered serum aminotransferase(ALT,AST) and sorbitol dehydrogenase(SDH) activties and reduced acute toxicity. It was also observed that histological changes of livers with scoparone and scopoletin pretreatment were less sever than in livers that was only bromobenzene-injected rats. Consquently, it was abserved that the mechanism for the observed protective effect of scoparone against the bromobenzene-induced hepatotoxicity by the scopoletin, the intermediate metabolite of scoparone.

교실 색채환경 개선을 위한 연구 : 강원도 중학교 중심으로

최은주,최법진 강원대학교 조형예술연구소 2005 조형예술논문집 Vol.6 No.-

Colors are psychologically influential environment, and they play an important part in young students' emotions. Since young people spend most their time at school. Especially classroom colors are very important to students psychologically and emotionally. The preference of a person in charge and financial factors are mostly considered than the educational aspect for choosing colors used for the interior of secondary schools. This study examined the effect of colors on young students, and the importance of classroom colors. Also, it surveyed and analyzed the color preferences, the degree of the students' satisfaction with the present classroom colors, and the desired colors for classrooms of the middle school students in Kangwon-do. According to the result, students preferred the bright colors, and a great number of students were not satisfied with their classroom colors which are mostly colorless. It is also known that the students' negative attitude caused by classroom colors made students feel bored with their school life and those colors made their eyes tired easily. If we try to improve the classroom color environment, we will help students to enhance learning efficiency and to foster their emotions soundly.

내독소로 유발된 삼추성 중이염에서 TNF-α Inhibitor의 효과

전은주,박용수,최영철,이정학 대한이비인후과학회 2000 대한이비인후과학회지 두경부외과학 Vol.43 No.10