• Title/Summary/Keyword: Correlations analysis

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Attack Path and Intention Recognition System for detecting APT Attack (APT 공격 탐지를 위한 공격 경로 및 의도 인지 시스템)

  • Kim, Namuk;Eom, Jungho
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.16 no.1
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    • pp.67-78
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    • 2020
  • Typical security solutions such as intrusion detection system are not suitable for detecting advanced persistent attack(APT), because they cannot draw the big picture from trivial events of security solutions. Researches on techniques for detecting multiple stage attacks by analyzing the correlations between security events or alerts are being actively conducted in academic field. However, these studies still use events from existing security system, and there is insufficient research on the structure of the entire security system suitable for advanced persistent attacks. In this paper, we propose an attack path and intention recognition system suitable for multiple stage attacks like advanced persistent attack detection. The proposed system defines the trace format and overall structure of the system that detects APT attacks based on the correlation and behavior analysis, and is designed with a structure of detection system using deep learning and big data technology, etc.

Analysis of Correlations between Mineral Contents in Waters and Sensory Characteristics of Coffee (물의 미네랄 함량과 커피 관능 특성에 관한 상관 분석)

  • Eo, Hee-Ji;Kim, Joo-Shin
    • Culinary science and hospitality research
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    • v.23 no.4
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    • pp.105-115
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    • 2017
  • Water is an essential ingredient to brew coffee. Mineral contents in the water can affect both water quality and taste quality of coffee. The effects of minerals in the water on sensory characteristics of coffee were investigated in different water samples (A: Arisu, B: Claris, C: Spring water, D: Samdasoo, E: Evian, Distilled water as control). Based on the results of quantitative descriptive analysis (QDA), there were statistically significant (p<0.01) in flavor, acidity, bitterness, sweetness, body and aftertaste according to different water samples used to brew coffee. The canonical correlation analysis of minerals (Ca, Mg, Na, K) and taste (acidity, bitterness, sweetness) indicated that there were highly correlated in the relationship between bitterness and Mg content. A strong negative relationship was shown between bitterness and acidity, sweetness. A result of preference test using hedonic scale showed an inverse linear relationship between taste quality and total mineral contents.

Formulation of Human Manikin Models Representative of Korean Male Pilots (한국인 조종사의 대표적 인체모형군 생성)

  • Lee, Jong-Sun;Song, Young-Woong
    • Journal of the Ergonomics Society of Korea
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    • v.21 no.1
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    • pp.15-26
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    • 2002
  • The anthropometric characteristics of the intended user population are most important parameters in the equipment and workplace layout design, particularly in the airplane cockpit design. Because human body is composed of multi-dimensional body segments, single 'average' or 'extreme' manikin is not sufficient in computer-aided design(CAD) environments. To overcome this limitation, we constructed a manikin group representing Korean Male pilot population. First, we identified 16 anthropometric variables which are important parameters in the evaluation of reach, visibility, and clearance. And we found their correlations and conducted a factor analysis. Four common factors were extracted in the factor analysis. The first one was related with length dimensions, the second was with the arm reach, the third was with the sitting height, and the last was with breadth-depth dimensions. Finally, 17 manikins were constructed and presented in the CAD prototype.

Effects of Logistics organization practices and Resources Circulation factor on Firm Performance (물류분야에서의 자원순환형시스템 구축 활동요인과 물류조직특성이 물류성과에 미치는 효과)

  • Lim, Jae-Hwa;Park, Seog-Ha
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.30 no.1
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    • pp.48-58
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    • 2007
  • For a sustainable development, the resources circulation system should be established and required alternative logistics area of enterprises. In this paper, we are to suggest a direction through analysis effects, and reduce, recycle, reuse factor of transportation, material handling, packing, information, management in logistics function, and effects of logistics organization on Firm Performance. We found significant correlations between the constructs extracted above, and between the constructs and firm's performance. This study was conducted with the subjects of manufacturing enterprises with concurrent reviews of literature and statistical analysis, and the meaning of this study would be the analysis of the influencers of the resources circulation system.

Evaluation of Resident Satisfaction Level on the Environment Friendly Consolidation Canals (친환경 정비수로에 대한 주민 만족도 평가)

  • Kim, Sun-Joo;An, Min-Woo;Ko, Jae-Sun
    • Journal of Korean Society of Rural Planning
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    • v.9 no.3 s.20
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    • pp.47-52
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    • 2003
  • The purpose of this study is to evaluate the satisfaction level and to analyze the factors in the environment friendly consolidation canals. In this study, the survey consists of four parts, such as the actual status of environment friendly canals, satisfaction level for each items, overall satisfaction level and the personal features of the users. Total 128 samples out of 140 respondents were used for the final analysis. Analysis of the satisfaction level were fulfilled to survey results such as the basic statistics and the correlations of variables, in addition, dispersion analysis for two user groups were carried out. Function of canal, water quality, landscape, and convenience facilities were chosen as independent variables in the model. Residents in Yeoju area were satisfied with water quality, water quantity and the function of canal. And residents of Yeonggwang area were satisfied with the convenience facilities and the function of the newly consolidated canal.

Numerical Analysis of Wind Turbine Scale Effect by Using Computational Fluid Dynamics (전산유체역학을 이용한 풍력터빈 축소효과 수치해석)

  • Park, Young-Min;Chang, Byeong-Hee
    • 한국신재생에너지학회:학술대회논문집
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    • 2006.06a
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    • pp.269-272
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    • 2006
  • Numerical analysis of wind turbine scale effect was performed by using computational fluid dynamics. For the numerical analysis of wind turbine. Three dimensional Navier-Stokes solver with various turbulence models was tested and realizable k-e turbulence model was selected for the simulation of wind turbines. To validate the present method, performance of NREL (National Renewable Energy Laboratory) Phase VI wind turbine model was analyzed and compared with experiment and blind test data. Using the present method, numerical simulations for various size of wind tunnel model were carried out and characteristics were observed in detail. The power loss due to the interference between wind turbine and nacelle was also computed for relatively larger nacelle installation in wind tunnel test. The present results showed good correlations with experimental data and reasonable trends of scale effect of wind turbine.

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Analysis of Factors Influencing the Intent to Stay among Military Hospital Nurses (군 병원 간호사의 재직의도에 미치는 영향요인 분석)

  • Yoon, Sook Hee;Ahn, Hyo Jeong
    • Korean Journal of Occupational Health Nursing
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    • v.31 no.2
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    • pp.86-94
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    • 2022
  • Purpose: This study aimed to determine the effects of grit, nursing work environment, and job esteem on the intent to stay among military hospital nurses. Methods: This study employed a descriptive cross-sectional design. Data were collected from February 7 to 18, 2022 from 232 nurses working at four military hospitals under the Armed Forces Medical Command. The analysis was conducted using the SPSS/WIN 26.0 program, and descriptive statistics, t-test, ANOVA, Pearson coefficient correlations, and multiple regression analysis were performed. Results: Factors affecting the intent to stay included job esteem (β=.44, p<.001), total clinical experience of more than 10 years (β=.24, p=.001), and nursing work environment (β=.17, p=.009). Conclusion: The results can be used to ensure personnel quality at military medical institutions and can contribute to improving patient safety and medical services. Further, nursing managers need to formulate and implement strategies to foster a positive nursing work environment.

A Study on Factors Influencing AI Learning Continuity : Focused on Business Major Students

  • Park, So Hyun
    • The Journal of Information Systems
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    • v.32 no.4
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    • pp.189-210
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    • 2023
  • Purpose This study aims to investigate factors that positively influence the continuous Artificial Intelligence(AI) Learning Continuity of business major students. Design/methodology/approach To evaluate the impact of AI education, a survey was conducted among 119 business-related majors who completed a software/AI course. Frequency analysis was employed to examine the general characteristics of the sample. Furthermore, factor analysis using Varimax rotation was conducted to validate the derived variables from the survey items, and Cronbach's α coefficient was used to measure the reliability of the variables. Findings Positive correlations were observed between business major students' AI Learning Continuity and their AI Interest, AI Awareness, and Data Analysis Capability related to their majors. Additionally, the study identified that AI Project Awareness and AI Literacy Capability play pivotal roles as mediators in fostering AI Learning Continuity. Students who acquired problem-solving skills and related technologies through AI Projects Awareness showed increased motivation for AI Learning Continuity. Lastly, AI Self-Efficacy significantly influences students' AI Learning Continuity.

The Effects of Early Childhood Teachers' Resilience and Empowerment on Their Job Satisfaction

  • Heesun Jeong;Sanglim Kim
    • International Journal of Advanced Culture Technology
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    • v.12 no.3
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    • pp.257-261
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    • 2024
  • The purpose of the study was to examine the relations of early childhood teachers' resilience, empowerment, and job satisfaction, and to investigate the effects of resilience and empowerment on their job satisfaction. The research subjects were 419 early childhood teachers in charge of 3-5 year olds in kindergartens or daycare centers located in South Korea. The collected data were analyzed using the SPSS 28.0 Program. We calculated the Cronbach's alphas and conducted the descriptive statistical analysis, Pearson's correlation analysis, and multiple regression analysis. The results showed the statistically positive correlations between the major variable. The positive effects of early childhood teachers' resilience and empowerment on their job satisfaction were also found. In the relative influence on job satisfaction, the empowerment was greater than resilience. Based on the study results, we suggest academic and practical importance of early childhood teachers' resilience and empowerment, which enables them dedicate on excellent teaching and caring young children via satisfaction with work settings.

Correlations between Spatial Distribution of Alien Plants and Land Cover - Focused on National Ecosystem Survey - (외래식물의 공간분포와 토지피복간의 상관성 연구 - 전국자연환경조사 자료를 중심으로 -)

  • Jung, Tae-Jun;Shin, Hyun-Chul;Shin, Young-Kyu;Kim, Myung-Jin
    • Journal of Environmental Impact Assessment
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    • v.22 no.5
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    • pp.455-466
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    • 2013
  • The aim of this study is to seek application plans of National Ecosystem Survey database based on comparison and examination of feasible analysis methods for distribution characteristics of alien plants. In order to set up a correlation analysis method between alien plants and environmental factors, we had reviewed the 3rd National Ecosystem Survey guide book and consequently, two kinds of analysis method were tested. One was 1/25,000 scale map boundary based analysis and the other was representative mountain area based analysis. In this study we restricted the research area to select reliable surveyed database from whole "2011 National Ecosystem Survey flora database" according to two major criteria. First, an area defined by 1/25,000 scale map boundary and representative mountain area where the number of surveyed flora records should be within top 20%. Second, land cover map should also be built up inside that area. As a result, 25 map boundaries and 25 representative mountain areas were extracted to be analyzed. To limit a boundary for every representative mountain area we had analyzed distribution of environmental factors around that area by manual inspection with SPOT-5 remote sensed satellite image then designated 3km buffer zone from each alien plant location in that area. After then, naturalized index (NI) and urbanized index (UI) was calculated and correlations analysis was carried out. With the result of correlation analysis by map boundary only agricultural land area showed significant value of r (0.4~0.6, correlated) and the rest of factors did not. In the case of representative mountain area, the result showed that agricultural land, road and forest area showed significant value of r (0.6~0.8, highly correlated) which was corresponding to existing researches. Therefore, representative mountain area based method is preferable when using the alien plants database of National Ecosystem Survey for species distribution analysis. And also, considering the way of database utilization is strongly suggested at the first stage of survey planning for promoting active use of national ecosystem survey database.