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행위 기반 인증을 위한 사용자 중심의 인증 요소 분석 연구
이영주,구예은,권태경 한국정보보호학회 2019 정보보호학회논문지 Vol.29 No.1
The growth in smartphone service has given rise to an increase in frequency and importance of authentication. Existingsmartphone authentication mechanisms such as passwords, pattern lock and fingerprint recognition require a high level ofawareness and authenticate users temporarily with a point-of-entry techniques. To overcome these disadvantages, there havebeen active researches in behavior-based authentication. However, previous studies focused on enhancing the accuracy of theauthentication. Since authentication is directly used by people, it is necessary to reflect actual users’ perception. This paperproposes user perception on behavior-based authentication with feature analysis. We conduct user survey to empiricallyunderstand user perception regarding behavioral authentication with selected authentication features. Then, we analyzeacceptance of the behavioral authentication to provide continuous authentication with minimal awareness while using thedevice. 패스워드, 패턴 락, 지문인식 등의 기존 스마트폰 인증 기술은 사용자의 높은 자각을 요구하며 한번 인증이 되면재인증 절차 없이 모든 정보에 접근이 허용되는 일시적 인증이다. 이를 보완하기 위해 최근 스마트폰 사용자의 기기사용 패턴 및 행동을 기반으로 한 행위 기반 인증이 주목받고 있다. 하지만 기존의 연구는 사용자 중심의 연구가 아닌 인증의 정확도를 높이는 연구가 중점적으로 수행되었다. 인증은 사람이 직접 사용하는 것이므로 사용자 인식의분석이 필요하다. 본 연구는 인증을 강화하고 빈번히 발생하는 인증에 대한 사용 편의성을 향상시키기 위해 행위 기반 인증 기술에 대해 사용자 중심의 연구를 수행한다. 이를 위해 기존의 행위 기반 인증에 대한 연구를 바탕으로 인증 요소를 선별하고 이에 대한 인식 및 행위 기반 인증 기법의 수용에 대한 인식을 분석한다.
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이영주 한국영어교과교육학회 2014 영어교과교육 Vol.13 No.2
This study examines students' satisfaction with and perceptions of the General English Program(GEP) at a university in a provincial area. Specifically, this study compares two types of the GEP courses; English II, a general English course and English III, a practical English course. A total of 411 students participated in the survey and interviews were conducted with 20 of them. Quantitative and qualitative data collection methods were employed to offer a better understanding than either one alone could provide. The results showed that there were similar patterns regarding students' perceptions of English II and English III. Students in both courses responded that they wanted to develop their speaking skills. Although survey results showed similar satisfaction with both the courses, interview results demonstrated a higher level of satisfaction with English III due to its practical aspects. Students also commented on the necessity of level-differentiated GEP courses. The findings provide practical implications of this GEP curriculum, which could also serve as a valuable reference for course planners in other universities.
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이영주,김창용,김광염,이성원,Lee, Young-Zoo,Kim, Chang-Yong,Kim, Kwang-Yeom,Lee, Sung-Won 한국터널지하공간학회 2006 한국터널지하공간학회논문집 Vol.8 No.3
터널시공에 있어서 굴진장은 기술적인 면뿐만이 아니라 경제적인 면에서도 큰 영향을 끼치지만 현재까지 굴진장 결정을 위한 일관된 절차는 연구되지 않았다. 본 연구에서는 수치해석을 통해 굴진장이 연암터널의 거동형태에 끼치는 영향을 알아보았다. 터널 막장과 무지보구간의 거동형태를 막장안전률과 설계차트를 이용해 정량적으로 판단할 수 있도록 하였으며, 설계단계에서의 최적 굴진장을 사이클타임과 공사비 등의 시공자료를 이용해 분석하였다. 비록 본 연구결과가 몇몇 적용한계를 가지고 있지만 설계단계에서 터널 굴착을 최적화하기 위한 정보를 제공할 수 있다. Although the round length for tunnel excavation has a major technical and economical impact in conventional tunnelling, there is no coherent procedure available for its determination. In this study, the influence of round length on the behaviour modes of weak rock tunnel was investigated by numerical analyses. Quantitative estimation of the behaviour modes of the face and the unsupported span was established by use of the safety factor for the face stability and the conditional chart. In addition, the optimum round length in the tunnel design stage was investigated based on the detail construction information such as cycle time and material costs. Although this proposed method has some restrictions, it is expected to provide useful information for the optimization of the tunnel excavation, especially in design stage.
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이영주,이재정,최창식,최문기,이무혁 대한혈관외과학회 1988 Vascular Specialist International Vol.4 No.1
Pulmonary embolism is a common complication of a variety of medical and surgical disorders and its incidence continues to rise. Despite of an improved understanding of this condition, a definite diagnosis had been made prior to death in only 7 percent. 2 patients with pulmonary embolism are reported. In one patient, a definite diagnosis was made at a postmortem examination. In the other patient, anticoagulant was administered after an objective diagnosis of pulmonary embolism had been established and he has recovered.
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이영주,전준표,강필현 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
The industrial wastewater and domestic wastewater are the serious problem that contaminates the nature and influence the injury on the human body. Among the methods to overcome those problems, the ion exchange technique has some critical advantages: the processing is simple and the efficiency is high. Particularly, due to the fast processing time and the high efficiency, the ion exchange fiber is much more effective than the ion-exchange resin. In this study, sulfonated GMA (glycidyl methacrylate)-g-cellulose ion exchange fibers were synthesized by electron beam radiation. In addition, factors affecting on grafting yield and sulfonation time were studied. These GMA-g-cellulose and sulfonated GMA-g-cellulose were characterized and analyzed by SEM, EA, FT-IR XRD and DSC.
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중환자에서 APACHE Ⅲ score와 사망율과의 관계
조준필,김준식,이영주 대한응급의학회 1995 대한응급의학회지 Vol.6 No.1
To evaluate the relationship between APACHE Ⅲ score and mortality in critically ill adult ICU patient, we studied the 548 patients who were admitted to the ICU from June 1, 1994 to January 31, 1995. We did not include patients with burn injuries, patients aged less than 15 years, or chest pain patients, in order to rule out myocardial infarction and unsatisfactory data files. There were 120 multiple trauma patients, 68 sepsis patients, 62 hemorrhagic shock patients, 20 multiple organ failure patients, and 120 patients with, among other conditions, durg intoxi-cation, diabetic ketoacidosis, renal failure, hepatic encephalopathy, and cerebral hemorrhage or infarction. The APACHE Ⅲ scores of survivors and non-survivors were analyzed with Chi-square test and compared. The number of nonsurvivors was 168 patients, and the overall mortality rate was 30.7%. there was a positive correlation between a high APACHE Ⅲ score and mortality ; all patients with more than 90 points expired. The average points of the survivors was 34.52 ±15.48 and of nonsurvivors was 77.74 ±31.37. The difference between each group is significant statistically. The average APACHE Ⅲ points was 47.8. The APACHE Ⅲ score is a good prognostic tool to predict the mortality rate in ICU adult patients, and can be used for selection of patients and for ICU admission/discharge. It can also be used to compare the efficacy of intensive care in different hospitals.
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