• The Journal of Engineering Geology
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• v.17 no.3
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• pp.483-494
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• 2007

The properties of fracture system on road-cut slopes along the Busan-Ulsan express way under construction are investigated and analyzed. Fracture spacing distributions show log-normal form with extension fractures and negative exponential form with shear fractures. Straight line segments in log-log plots of cumulative fracture length indicate a power-law scaling with exponents of -1.13 in site 1, -1.01 in site 2 and -1.52 in site 3. It is likely that the stability and strength of rock mass are the lowest in site 1 as judged from the analyses of spacing, density and inter-section of fractures in three sites. In contrast, the highest efficiency of the fracture network for conducting fluid flow is seen in site 3 where the largest cluster occupies 73% through the window map. Based on the field survey data, this study modified weighting values of the RMR system using a multiple regression analysis method. The analysis result suggests a modified weighting values of the RMR parameters as follows; 18 for the intact strength of rock; 61 for RQD; 2 for spacing of discontinuities; 2 for the condition of discontinuities; and 17 for ground water.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.19 no.2
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• pp.18-35
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• 2020

Many human, roadway, and vehicle factors affect vehicle-pedestrian crashes. Especially, the roadway factors are easily defined and suitable for suggesting countermeasures. The characteristics of the road network are one of the roadway factors. The road network significantly influences behaviors and conflicts of drivers and pedestrians. A metropolitan city such as Seoul contains various types of road networks, and crash prevention strategy considering characteristics of the road network is required. In this study, we analyze the effects of road networks on vehicle-pedestrian crashes. In the study, high order road ratio, intersection ratio, high-low intersection ratio are considered as road network variables. Using Geographically Weighted Poisson Regression, crash frequencies in Dongs of Seoul are analyzed based on the road network variable as well as socioeconomic variables. As a result, Dongs are grouped by coefficient signs, and each group is suggested about improvement directions considering conflict situations.

• Journal of the Korea Society of Computer and Information
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• v.29 no.5
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• pp.131-142
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• 2024

In this paper, we propose antecedent factors that influence health promotion behaviors among rural older adults by gender. The study analyzed data from the 'Need Assessment Survey for the Development of Customized Care Programs for Rural Older Adults' conducted by the Rural Development Administration. The analysis utilized data from 502 individuals aged 65 and older residing in rural areas. The analysis method used SPSS 25.0 program to conduct descriptive statistics, chi-square analysis, correlation analysis, and hierarchical regression analysis. The analysis results showed differences between men and women in practicing health promotion behaviors. For men, lower age, lower education level, living with a spouse, and participating in social activities were associated with higher levels of health promotion behaviors. For women, older age, better self-rated health status, and participating in social activities were associated with higher levels of health promotion behaviors. This study provides baseline data to promote health promotion behaviors among rural older adults according to gender and suggests policy and practical implications based on the findings.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.28 no.3
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• pp.305-315
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• 2010

This research aims to develop a method to determine the 3D coordinates of an object point from overlapping omni-directional images acquired by a ground mobile mapping system and assess their accuracies. In the proposed method, we first define an individual coordinate system on each sensor and the object space and determine the geometric relationships between the systems. Based on these systems and their relationships, we derive a straight line of the corresponding object point candidates for a point of an omni-directional image, and determine the 3D coordinates of the object point by intersecting a pair of straight lines derived from a pair of matched points. We have compared the object coordinates determined through the proposed method with those measured by GPS and a total station for the accuracy assessment and analysis. According to the experimental results, with the appropriate length of baseline and mutual positions between cameras and objects, we can determine the relative coordinates of the object point with the accuracy of several centimeters. The accuracy of the absolute coordinates is ranged from several centimeters to 1 m due to systematic errors. In the future, we plan to improve the accuracy of absolute coordinates by determining more precisely the relationship between the camera and GPS/INS coordinates and performing the calibration of the omni-directional camera

• Journal of the Korea Society of Computer and Information
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• v.25 no.10
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• pp.151-158
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• 2020

In this paper, we propose the basic data for cancer patient management by secondary analysis of data from the National Health and Nutrition Survey(KNHANES) to identify factors related to suicidal thinking of cancer patients over 19 years of age in Korean adults lapse of time. The data were analyzed using the IBM SPSS WIN 22.0 program in order to analyze the demographic, health, and mental characteristics of the subjects in 2009 and 2017. It was analyzed using logistic regression analysis. As a result of the study, the factors related to suicidal thinking in cancer patients were activity restriction and experience of depression in 2009(Negelkerke R²=.384), and age, marital status, activity restriction, and experience of depression in 2017(Negelkerke R²=.525). This study is meaningful in that the factors related to suicidal thoughts in cancer patients were identified according to the lapse of time, and the changes in the related factors were confirmed. Development and application of an intervention program to prevent suicide in cancer patients are necessary.

• 한국HCI학회:학술대회논문집
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• 2008.02b
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• pp.7-12
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• 2008

This study aims to extract the factors which constitute use tendency on digital product, and to devide korean generation. We surveyed to digital product users who are 15 through 49 years old, executed factor analysis, cluster analysis, and so on, The results of factor analysis, we selected 11 factors, named as interest, entertainment, simplicity, anxiety of mal-operation, practicality, personality, consistency, multi-functionality, learning style of how-to-use, responsibility of disorder, and lending degree. The results of cluster analysis, we classified subjects into following three types: positive acceptor, passive follower, and conservative indifference. And, we executed frequency analysis iteratively. We devide korean digital product users to 4 generations -1727G, 2834G, 3538G, 3949G- by means of synthesizing the results. It can be said that generation is strong factor effect to use tendency, but the other factors like sex, occupation, school career, income become weak factor or not matters. Finally, we considered the reason, 3538G takes a crossing point role through comparison the generation division with cohort research on product use experience.

• Culinary science and hospitality research
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• v.16 no.4
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• pp.1-14
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• 2010

This study is to analyze the difference of perception about Korean traditional food by generations in Busan area. For the analysis of this study, both the cross tabulation analysis and Frequency analysis were used, by choosing the random specimen of investigation from middle and high school students, college students and general people residing in Busan area. The result of the study is as follows. First, the frequency of preference for traditional food is different by generations. Second, Korean traditional food is the most preferred among all generations. Third, menu is decided mainly for a father in the family. Finally, standardized and simplified recipes are needed for busy people. To improve the difference by generation, herbs or seasonings should be added or ingredients should be changed into ones suitable to young generation's taste. It is necessary for future studies to have extended samples nationwide for balanced specimen.

• Journal of Digital Convergence
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• v.17 no.4
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• pp.355-364
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• 2019

The purpose of this study is to present the implications of analyzing users' market segmentation and characteristics based on the tourism SNS lovemarks experience. The results are as follows. First as a result of conducting factor analysis of tourism SNS lovemarks experience, five factors explained namely, mystery, sensuality, intimacy, trust, reputation. Second, as a result of conducting cluster analysis, four cluster groups were identified (reputation/sensuality centered experience group, high lovemarks experience group, intimacy centered experience group, low lovemarks experience group) and each characteristics were profiled. Third, as a result of Chi-square analysis and correspondence analysis, there was a difference in the characteristics of tourism SNS usage by cluster. Fourth, higher tourism SNS lovemarks experience segmented groups were more likely to recognize the degree of experiential value, satisfaction, behavioral intention.

• Journal of the Korean Applied Science and Technology
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• v.40 no.4
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• pp.797-810
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• 2023

The shape of the male beard to be examined in this study was set as a mustache. This study used frequency analysis and cross-tab analysis to conduct T-test and one-way variance analysis using 300 final responses from the questionnaire that presented preference and non-preference reasons and demographic characteristics along with preference and non-preference options to measure the likability of whiskers. As a result of the study, there were differences in men's preference and non-preference for each beard formulation, and the level of difference was statistically significant between the male and female groups and the age group. In addition, it was found that each group category showed a difference in the reasons for judging likes/dislikes by beard form. There are differences in preference and non-preference according to men's beard formations, and it was confirmed that there are various differences according to perceptual characteristics in the main reasons for favorability and dislike, which are the basis for judgment. Through these results, academic and practical implications were presented in the field of beauty.

• Informatization Policy
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• v.19 no.3
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• pp.64-93
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• 2012

This paper attempts to empirically verify the theoretical assumption that ICT factors actually affect national economic development. To this end, this study uses a research model, 'balance model of supply-demand', which consists of IT supply, IT demand and IT policy dimensions. Also, this paper employs several socio-economic factors such as 'size of population', 'consumer price increase', 'national transparency', and 'education'as the moderating variables. The result through the panel data analysis finds it statistically relevant to relate the ICT capacity to each country's economic growth. Also, the study finds that moderating variables were highlighted as important elements of national development: these variables actually moderate the ICT capacity's effects on each surveyed nation's economic growth. Finally, this paper suggests policy implications that nations should consider when developing national informatization policies to drive national economic growth.