네트워크상에서의 징후를 기반으로 한 공격분류법

김기윤,최형기,최동현,이병희,최윤성,방효찬,나중찬,Kim Ki-Yoon,Choi Hyoung-Kee,Choi Dong-Hyun,Lee Byoung-Hee,Choi Yoon-Sung,Bang Hyo-Chan,Na Jung-Chan 한국정보처리학회 2006 정보처리학회논문지 C : 정보통신,정보보안 Vol.13 No.4

공격 발생시에 네트워크에 나타나는 징후정보를 수집하여 공격을 분류하는 징후기반공격분류법을 제안한다. 이 공격분류법은 공격 발생시 징후를 이용하므로 필요한 정보의 수집이 빠르고 알려지지 않은 공격에 대한 분류가 가능한 장점이 있다. 제안하는 공격법은 두 단계로 공격을 분류한다. 단일 공격자로부터 단일 공격대상에게 나타나는 단일 공격들을 먼저 분류하고 단일 공격들이 서로 연관성 없는 다른 공격들인지 아니면 동일한 하나의 공격을 구성하는 연관된 공격인지 판단하게 된다. 따라서, 이미 제안된 공격분류법보다 정확하게 분산서비스거부공격이나 웜, Bot과 같은 공격을 분류할 수 있게 되었다. 제안하는 분류법을 이용하여 원과 분산서비스거부공격의 특정 및 근거리통신망에서 발생하는 공격의 특정을 도출하였고 이러한 특정들은 새로운 웜이나 분산서비스거부공격 또는 근거리통신망에서 발생하는 공격들도 공통적으로 가지는 특정임을 보였다. We present a symptom based taxonomy for network security. This taxonomy classifies attacks in the network using early symptoms of the attacks. Since we use the symptom it is relatively easy to access the information to classify the attack. Furthermore we are able to classify the unknown attack because the symptoms of unknown attacks are correlated with the one of known attacks. The taxonomy classifies the attack in two stages. In the first stage, the taxonomy identifies the attack in a single connection and then, combines the single connections into the aggregated connections to check if the attacks among single connections may create the distribute attack over the aggregated connections. Hence, it is possible to attain the high accuracy in identifying such complex attacks as DDoS, Worm and Bot We demonstrate the classification of the three major attacks in Internet using the proposed taxonomy.

천궁 초작과 연작 재배지의 토양특성이 토양 곰팡이 군집에 미치는 영향

김기윤(Ki Yoon Kim),한경민(Kyeung Min Han),김현준(Hyun Jun Kim),김충우(Chung Woo Kim),전권석(Kwon Seok Jeon),정충렬(Chung Ryul Jung) 한국약용작물학회 2020 한국약용작물학회지 Vol.28 No.3

Background: This study investigated the effects of soil properties on the soil fungal community in first and continuous cultivation areas of Cnidium officinale Makino. Methods and Results: The soil fungal community was analyzed for relative abundance and principal coordinate analysis (PCoA) was conducted using Illumina MiSeq sequencing. The correlation between the soil chemical properties and the soil fungal community was assessed with distance-based linear models (DISTLM). The soil fungal community showed distinct clusters consisting in the continuous cultivation area of C. officinale Makino. PCoA and DISTLM indicated that soil pH, calcium, and available P2O5 significantly affected the soil fungal community in the cultivation area of C. officinale Makino. In addition, considering 5 different pathogenic fungi the relative abundance of Fusarium in the continuous cultivation area was significantly higher compared to that in the first cultivation area of C. officinale Makino. Conclusions: This study is important because it has determinined the effects of soil properties on the soil fungal community in both first and continuous cultivation areas of C. officinale Makino. Moreover, these results will be helpful to investigate the cause of continuous cropping obstacle in C. officinale Makino by examining the changes of soil fungal community.

Differences of Fun and Immersion according to Game User Interfaces in the Virtual Space

Ki-Yoon Kim(김기윤),Ju-Hwan Lee(이주환) 한국디지털콘텐츠학회 2017 한국디지털콘텐츠학회논문지 Vol.18 No.8

The purpose of this study is to investigate the limitations of virtual space game contents staying in the first-person viewpoint in the field of digital games with various genres through precedent researches and case studies, and to investigate the differences of immersion, presence, and fun based on the user interfaces, such as the viewpoints (first-person, third-person) and haptic feedback. The experimental results show that when the game is the first-person with the haptic feedback, the immersion, presence, and fun increase. However, the interaction effect between the virtual space environment and the game viewpoint was not found. As a result, it is appropriate to use the haptic feedback and the first-person viewpoint in the virtual reality games, but the fact that the game viewpoints and the virtual space environment are not huge relevant, and the third-person viewpoint is more popular than first-person viewpoint game, therefore the possibility of a third-person viewpoint game would be suggested.

침엽수림과 혼효림에서 토양특성과 토양세균 군집이 산양삼 초기 생육특성에 미치는 영향

김기윤(Ki Yoon Kim),김현준(Hyun Jun Kim),엄유리(Yurry Um),전권석(Kwon Seok Jeon) 한국약용작물학회 2020 한국약용작물학회지 Vol.28 No.3

Background: This study investigated the effect of soil properties and soil bacterial community on early growth characteristics of wild-simulated ginseng (Panax ginseng C. A. Meyer) in coniferous and mixed forest experimental fields. Methods and Results: The soil bacterial community was analyzed using a high throughput sequencing technique (Illumina MiSeq sequencing). The relationship between the soil bacterial community, soil properties, and growth characteristics of wild-simulated ginseng were analyzed using principal coordinate analysis (PCoA) and the Pearson’s correlation analysis. Soil properties and soil bacterial community showed significant difference with forest physiognomy. Results of Pearson’s correlation analysis and PCoA showed that the soil properties (soil pH, organic matter, total nitrogen, and cation exchange capacity) and soil bacterial community had significant correlation with tree species ratio and early growth characteristics of wild-simulated ginseng. Conclusions: This study clearly demonstrated the effect of soil properties and soil bacterial community on early growth characteristics of wild-simulated ginseng in coniferous and mixed forest. Moreover, these results will help in the selection of suitable cultivation sites for wild-simulated ginseng.

VR콘텐츠를 활용한 진로체험 교육프로그램 개발 및 운영 사례 연구 -초·중·고 사례에 대한 통합적 결과를 중심으로

김기윤 ( Ki-yoon Kim ) 지속가능경영학회 2024 지속가능경영연구학회지 Vol.8 No.4

[Necessity of research] In the era of digital transformation, there is a growing need for in-depth discussions on the development of educational programs utilizing immersive content such as VR, AR, and the metaverse, as well as the appropriate methods for their application. [Research Purpose] The development and operation of VR-based career exploration education programs can serve as a valuable case study to propose research on teaching methods and educational directions in the era of digital transformation. [Research Method] Following the ADDIE model, a class was designed, VR content was planned and created, and classes were conducted for elementary, middle, and high school students. Satisfaction was measured in terms of education, content, and class operation. [Results] Overall educational satisfaction was recorded at 88 points. Specifically, over 60% of participants expressed high satisfaction with the class design, the experiential time based on content planning, and the career-related themes. Additionally, positive feedback on the tutorial phase and the immersive content environment highlighted the potential for fostering a positive perception of the associated career themes. [Conclusion] This study is significant as it analyzes cases involving the design of educational programs, content planning and production, and educational operation utilizing immersive content such as VR and the metaverse―key components of future education. The discussion focuses on the effectiveness of immersive career education across different school levels in real educational settings.

퍼지 TOPSIS를 이용한 보험회사 업무정보시스템의 재난복구 우선순위결정

김기윤 ( Ki-yoon Kim ),양동구 ( Dong-gu Yang ) 한국리스크관리학회 2015 리스크 管理硏究 Vol.26 No.2

본 논문의 연구목적은 정보시스템에 퍼지 의사결정방법을 적용하여 재난복구 우선순위결정문제를 해결하는 것이다. 퍼지 환경 아래에서 보험회사 업무정보시스템의 재난복구 우선순위결정을 위한 TOPSIS 접근방법을 도출하기 위해서, 모호성과 주관성에 대한 언어적 측정값은 사다리꼴 퍼지 수로 나타낼 수 있다. 본 연구에서는 평가기준에 대한 가중치를 도출해서 업무정보시스템의 재난복구 우선순위를 평가하기 위해서, 퍼지 TOPSIS 방법을 적용하였다. 이러한 접근방법으로 4가지의 평가기준(시스템 의존도, RTO, 손실, 업무대체자원)과 4명의 평가자가 평가하는 15개 업무정보 시스템에 대한 보험회사 사례를 제시하였다. 결론적으로 본 연구에서 제안한 접근방법은 보험회사의 재난복구 우선순위결정에 매우 적합한 것으로 나타났다. 본 논문에서 제시한 퍼지 환경에서 재난복구 우선순위결정에 대한 체계적인 접근방법은 업무연속성계획(BCP)을 위한 업무영향분석(BIA) 뿐만 아니라, 다른 위기 의사결정문제분석에도 쉽게 적용가능하다. This paper is aimed to present a fuzzy decision-making approach to deal with disaster recovery priority decision problem in information system. We derive an evaluation approach based on TOPSIS(Technique for Order Performance by Similarity to Ideal Solution), to help disaster recovery priority decision of business information system for insurance company in a fuzzy environment where the vagueness and subjectivity are handled with linguistic terms parameterized by trapezoidal fuzzy numbers. This study applies the fuzzy TOPSIS method to determine the importance weight of evaluation criteria and to synthesize the ratings of disaster recovery priority for business information system. This approach is demonstrated with a real case study involving 4 evaluation criteria(system dependence, RTO, loss, alternative business support), 15 business information systems assessed by 4 evaluators from a insurance company. This paper shows that the proposed method is well suited as a decision-making tool for disaster recovery priority decisions in insurance company. The systematic framework for disaster recovery priority decision in a fuzzy environment presented in this paper can be easily extended to BIA(Business Impact Analysis) for BCP(Business Continuity Planning) as well as the analysis of other crisis decision problems.

생태학의 사회 문화적 배경에 관한 역사적 고찰

김기윤(Ki Yoon Kim) 한국과학사학회 2002 한국과학사학회지 Vol.24 No.1

N/A

실감형 콘텐츠의 특성이 교육효과에 미치는 영향에 대한 연구 - VR콘텐츠의 지각된 특성을 중심으로

김기윤(Kim, Ki Yoon) 한국서비스경영학회 2021 서비스경영학회지 Vol.22 No.3

Recently, as awareness of educational service quality is increasesing, various studies are being conducted to improve educational service quality. In this study, to verify the educational effect of students on VR content used in the educational field, and to explore the relationship between the perceived characteristics of users who use immersive content and the effect on the need for immersive content and educational effects. As a result of the study, it was found that presence and interactivity had a positive(+) effect on necessity, and that complexity had a negative(-) effect. Also, presence, interactivity, and necessity were found to have a positive(+) effect on the educational effect, and VR sickness was derived to be statistically insignificant for both necessity and educational effect. This model explains 74.8%. Based on these results, when VR contents are used for education in the future, concerns about VR sickness can be resolved, and it was possible to discuss the need to plan and produce sophisticated interactivity.

진화생태학의 형성을 통해 살펴본 생태학의 성격

김기윤 ( Ki Yoon Kim ) 한국과학사학회 2002 한국과학사학회지 Vol.24 No.2

냉전과 토머스 쿤의 『과학혁명의 구조』

김기윤 ( Kim Ki-yoon ) 호남사학회 2018 역사학연구 Vol.71 No.-

Thomas Kuhn's The Structure of Scientific Revolutions is the most frequently cited scholarly piece of work during the last 50 years. Philosophers have been written tremendous amount of research papers on the meanings and uses of paradigm, normal science, or incommensurability, the concepts introduced through the book. Rather strangely, the intellectual history of this influential book which seemed to make the most identifiable scholarly tone for modern disciplines from education to accounting is remains untrodden area. This article starts with different readings of the book by historians of science and traditional intellectual historians. Historians of science read the book as a typical textbook of history of ideas; Intellectual historians read the book as a typical production of the Cold War mentality, yet they also traced the intellectual roots of the book from American liberal democracy. On the other hand, researchers of the science studies, or science and technology studies were struck by the book which seemed to suggest the possibility and necessity of social studies of science, and many of them dubbed themselves Kuhnians in that sense. Yet frustratingly, Kuhn denied that his ideas could be interpreted as acknowledging social interpretations of science. Steve Fuller argued that Kuhn was a foot soldier of the ultimate Cod War warrior James Conant, the president of Harvard University, who lead Kuhn to be an historian of science. This article tries to evaluate Fuller's intriguing argument. Recent studies on Cold War began to provide some insightful keys to explain the intellectual status of Kuhn and his The Structure of Scientific Revolutions. The book has been a syndrome as well as a powerful instrument of making modern disciplines, scientific ones and others. Historical researches on the political, social, cultural, and educational background of the reception and appropriation of the book are opening new horizons not only for appreciating many intriguing aspects of the book but also for the understanding of the world in which Kuhn lived.