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OLAP 상에서 데이터 접근 제어 메커니즘 설계 및 구현
민병국,최옥경,김강석,홍만표,예홍진,Min, Byoung-Kuk,Choi, Ok-Kyung,Kim, Kang-Seok,Hong, Man-Pyo,Yeh, Hong-Jin 한국정보처리학회 2012 정보처리학회논문지 C : 정보통신,정보보안 Vol.19 No.2
OLAP(On-Line Analytical Processing) 툴은 조직 운영에서 발생하는 데이터의 양이 많아짐에 따라 분석 수요도 함께 급증하며 전문 분석가의 역량만으로는 처리할 수 없는 분석 요구 사항을 충족시키기 위한 툴이다. OLAP에서는 다양한 사용자가 직접 데이터베이스에 접근하여 대화식으로 질의를 던지고 응답을 받아 분석 업무를 진행할 수 있다. 이렇게 많은 사용자들이 데이터베이스에 직접 접근을 하게 됨에 따라 조직의 민감한 데이터를 지키기 위한 보안 정책이 필수가 되었다. 하지만 기존 연구에서는 OLAP의 기능적인 분석에 치중하여 MDX(Multidimensional Expressions)와 XMLA(XML for Analysis) 등의 기법으로 기능을 구현하는 것에 그치고 있다. 이에 본 연구에서는 기존 연구의 문제점을 보완하기 위한 방법으로 효율적인 정보 보호를 위한 데이터 접근 제어 메커니즘을 제안하고 이를 설계 및 구현하였다. 제안한 데이터 접근 방법이 실제 OLAP 환경에서 효율성 있게 동작함을 확인하기 위해 실험평가를 수행하여 본 연구의 우수성을 입증하였다. OLAP(On-Line Analytical Processing) is a tool to satisfy the requirements of managing overflowing data analysis. OLAP can provide an interactive analytical processing environment to every end-user. Security policy is necessary to secure sensitive data of organization according to users direct access database. But earlier studies only handled the subject in its functional aspects such as MDX(Multidimensional Expressions) and XMLA(XML for Analysis). This research work is purported for solving such problems by designing and implementing an efficient data access control mechanism for the information security on OLAP. Experimental evaluation result is proposed and its efficiency and accuracy are verified through it.
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Resin Work Technique에 따른 Orthodontic Acrylic Resin의 파절강도에 관한 연구
閔炳國 동남보건대학 2002 論文集-東南保健大學 Vol.20 No.1
This study aims to maximize the function of base plate in dental orthodontic appliance by comparing fracture strength of base plates manufactured with spray-on technique and doughing technique. S₁-group(spray-on technique) and D₁-group(doughing technique) were manufactured in tap water at room temperature under the pressure of 1㎏/㎠. S₂-group and D₂-group were manufactured in 20℃ distilled water under the pressure of 2㎏/㎠. S₃-group and D₃-group were manufactured in 20℃ distilled water under the pressure of 4㎏/㎠. S₄-group and D₄-group were manufactured in 40℃ distilled water under the pressure of 2㎏/㎠. S_(5)-group and D_(5)-group were manufactured in 40℃distilled water under the pressure of 4㎏/㎠. In each group 5 sample plates of each group were prepared with the size of 25×2×2㎜. so total 50 sample plates were manufactured using self-curing resin. After sample plates were immersed in distilled water(37±1℃) for one day. the fracture strength of each was measured with 3 point flexural equipment of Instron. The results are as follows: 1. When sample plates were manufactured in tap water at room temperature under the pressure of 1㎏/㎠. the fracture strength was low regardless of the resin work technique. 2. When sample plates were manufactured in 20℃ distilled water under the pressure of 2㎏/㎠, sample plates manufactured with doughing technique(D₂) showed significantly higher fracture strength(p<.05) than those with spray-on technique(S₂). When sample plates were manufactured with spray-on technique in 20℃ distilled water, sample plates manufactured under the pressure of 4㎏/㎠(S₃) showed significantly higher fracture strength(p<.05) than those under the pressure of 2㎏/㎠(S₂). 3. When sample plates were manufactured in 40℃ distilled water, sample plates manufactured with doughing technique showed higher fracture strength than those with spray-on technique. But, there were no significant differences in fracture strength between the resin work technique or between the pressure. With these results. the fracture strength of sample plates will be higher when the temperature of distilled water and the pressure increased, and when sample plates were manufactured with doughing technique rather than with spray-on technique.
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경인지역 치과기공사의 건강증진행위와 자기효능감과의 관계 연구
閔炳國,李周熙 동남보건대학 2001 論文集-東南保健大學 Vol.19 No.1
This study was designed to investigate the relationship of health promoting daily life style and self-efficiency about a dental technician. For maintaining health, it is important to keep one s healthful behavior. If human activity is decided by personal recognition, it might be crucial to research the relationship between health promotion behavior and the recognition factors on health promotion. A self-efficiency, among cognitive-perceptual factors, has been convinced of being the most efficient factor for a health promotion to take and maintain a certain activity. The purpose of this study is to inquire into the degree of health promotion activity of a dental technician, and to find out the relationship between the self-efficiency and the health promotion behavior in order to offer the basic data for developing a educational method or program of health promotion. The objects of this study were selected by haphazard sampling and the size was 203 of the dental technician. I collected the data 24 November 2000 to 8 January 2001 and the data was analyzed by means, percentage, ANOVA, pearson's correlation coefficient and stopwise multiple regression, using SPSS-PC+, and the results are as follows. 1. The hypothesis that 'The higher the self-efficacy, the better the health-promoting behaviors' was supported on a meaningful level(r=.623, p<.000). I analyzed the effect of self-efficacy on each section of the health-promoting behaviors and the result in every section supported the hypothesis on a meaningful level-the eating habit(r=.541. p<.000), drinking · smoking(r=.629, p<.000), health responsibility(r=.02, v<.000). the control of interpersonal relation(r=.415. p<.000). the exercise(r=.504, p<.000), the control of interpersonal relation(r=.313, p<.000), self-achievement(r=.542, p<.000). 2. The executive degree of health-promoting behaviors of the objects was above-middle, 2.59(total=4.00). When the means of the executive degree of each sections were examined, the section of self-achievement was the highest(2.98), and the others order was drinking smoking(2.81), the control of personal relation(2.80), the control of stress(2.68), the eating habit(2.82), the exercise(2.49), health-responsibility(2.07). 3. The point of self-efficacy was 6.63(total=10.00). In each sections, self-achievement was the highest(7.82). the control of interpersonal relation(7.33), drinking smoking (6.92) was the next, and the control of stress(6.90) was the next, the eating habit(6.26), the exercise(6.05), health-responsibility(5.98) was the lowest one.
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