• Title/Summary/Keyword: 위계적 회귀

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Exploring the Cognitive Factors that Affect Pedestrian-Vehicle Crashes in Seoul, Korea : Application of Deep Learning Semantic Segmentation (서울시 보행자 교통사고에 영향을 미치는 인지적 요인 분석 : 딥러닝 기반의 의미론적 분할기법을 적용하여)

  • Ko, Dong-Won;Park, Seung-Hoon;Lee, Chang-Woo
    • The Journal of the Korea Contents Association
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    • v.22 no.5
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    • pp.288-304
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    • 2022
  • Walking is an eco-friendly and sustainable means of transportation that promotes health and endurance. Despite the positive health benefits of walking, pedestrian safety is a serious problem in Korea. Therefore, it is necessary to investigate with various studies to reduce pedestrian-vehicle crashes. In this study, the cognitive characteristics affecting pedestrian-vehicle crashes were considered by applying deep learning semantic segmentation. The main results are as follows. First, it was found that the risk of pedestrian-vehicle crashes increased when the ratio of buildings among cognitive factors increased and when the ratio of vegetation and the ratio of sky decreased. Second, the humps were shown to reduce the risk of pedestrian-related collisions. Third, the risk of pedestrian-vehicle crashes was found to increase in areas with many neighborhood roads with lower hierarchy. Fourth, traffic lights, crosswalks, and traffic signs do not have a practical effect on reducing pedestrian-vehicle crashes. This study considered existing physical neighborhood environmental factors as well as factors in cognitive aspects that comprise the visual elements of the streetscape. In fact, the cognitive characteristics were shown to have an effect on the occurrence of pedestrian- related collisions. Therefore, it is expected that this study will be used as fundamental research to create a pedestrian-friendly urban environment considering cognitive characteristics in the future.

Relationship between Organizational Culture and Job Characteristic and Job Continuance among Private Security Guards (민간경비원의 조직문화와 직무특성 및 직무지속의지의 관계)

  • Lee, Jong-Hwan
    • The Journal of the Korea Contents Association
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    • v.14 no.1
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    • pp.444-454
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    • 2014
  • The purpose of this study is compares organizational culture and job characteristic and job continuance will of private security searches its investigate relation. This study had selected private security company members from Seoul of 2011 for population. Using purposive sampling method, 280 samples were drawn and were used for the final analysis. Using SPSS WIN 18.0, frequency analysis, factor analysis, reliability analysis, multiple regression analysis were performed. Cronbach's ${\alpha}$ value which shows the reliability of the survey came out to be over .665. The conclusion is following : First, organizational culture of private security service affects in job characteristic. As a work period is long, the job importance and feedback appear high. As development mutual agreement culture is formed, the job importance, autonomy is high. As reasonable culture is formed, the job importance, autonomy, feedback are high. As a hierarchical culture is formed, the job importance, feedback rises, and on the other hand, autonomy decreases. Second, organization culture affects in job continuance will to private security guard. Job expectation is high in man group. As age is high, crisis sense decreases. As attainments in scholarship is high, job satisfaction, shrinkage, alternative expectation increase. As there are much monthly income, job satisfaction, shrinkage, job expectation, alternative expectation, crisis sense become increase. As development mutual agreement culture is formed, job satisfaction, malicious insincerity, job expectation, alternative expectation, crisis sense are high. As reasonable culture is formed, job expectation increases, and on the other hand, malicious insincerity decreases. As a hierarchical culture is formed, job satisfaction, malicious insincerity, job expectation, crisis sense appear high. Third, private security guard job characteristic affects in job continuance will. As attainments in scholarship is high, job satisfaction, job expectation, alternative expectation increase. As a work period is long, job satisfaction, job expectation, alternative expectation, crisis sense appear decreases. As there are much monthly income, job satisfaction, job expectation, alternative expectation, crisis sense increase. Job satisfaction, job expectation increases as recognize the job importance high. Job satisfaction, shrinkage, malicious insincerity, job expectation, alternative expectation increase as recognize autonomy high. If feedback is proceeded well, malicious insincerity decreases.

Effects of Minor Stressful Events on Sleep in College Students (대학생에서 스트레스가 수면에 미치는 영향)

  • Kang, Seung-Gul;Yoon, Ho-Kyoung;Ham, Byung-Joo;Choi, Yun-Kyeung;Kim, Seung-Hyun;Joe, Sook-Haeng;Suh, Kwang-Yoon;Kim, Leen
    • Sleep Medicine and Psychophysiology
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    • v.9 no.1
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    • pp.48-55
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    • 2002
  • Objective: Stress is known to be a common cause of short-term insomnia and insomniacs often complain that stress induces sleep problems. However, previous studies on the correlation between stress and sleep do not show consistent results. We aimed to investigate the effects of minor stressful events on sleep among college students. Method: Physically and mentally healthy college student volunteers filled out a self-assessment questionnaire to evaluate their stress and sleep. To find out the status of average stress and sleep, the volunteers filled out K-DSI and daily sleep assessments on three consecutive days. In addition, we surveyed the amount of caffeine beverage intake and assessed the degree of depression and anxiety. Results: The total number of students participating in this study was 202, 101 men and 101 women. Minor stress turned out to significantly affect non-restorative sleep and secondary symptoms of insomnia (awakening difficulty, displeasure, feeling of dissatisfaction with sleep, physical uneasiness or pain at awakening, daytime sleepiness, depressive moods, tiredness and concentration difficulty). However, global PSQI score, self-reported sleeping hours, sleep latency, awakening frequency, frequency and duration of napping, were not explained by stress scores. Conclusion: In this study, minor stresses seemed to affect sleep, especially secondary symptoms caused by non-restorative sleep. We can thus infer that minor stresses impair the restorative effects of sleep by inducing arousal, and the direct relationship the two can be confirmed by polysomnogram.

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A Study on the Relationships Among Learning Orientation, Innovativeness and Organizational Commitment of Entrepreneurs: Focusing on the Mediating Effect of Innovativeness and the Moderating Effect of Career Relevance (학습지향성 및 혁신성과 조직몰입 간의 관계에 관한 연구: 혁신성의 매개효과와 경력연관성의 조절효과를 중심으로)

  • Joo-Heon, Lee
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.17 no.6
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    • pp.159-174
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    • 2022
  • Entrepreneurs should continuously invest resource and capital for a long time to get tangible business results. In order to be successful, despite difficulties, it is essential for entrepreneurs to continue entrepreneurial businesses without giving up too early. Thus, it can be said that organizational commitment of entrepreneurs is essential for success. According to previous studies, the organizational commitment of entrepreneurs has a significant effect on organizing, establishments of new firms and new product developments. The purpose of this article is to examine the relationships among learning orientation, innovativeness and organizational commitment of entrepreneurs. Especially, we focus on the mediating effect of innovativeness in the relationship between learning orientation and organizational commitment and the moderating effect of career relevance among the relationships. Based on empirical analysis, we reported the following results. First, learning orientation, innovativeness and career relevance of entrepreneurs had significant positive effects on organizational commitment. Second, it was found that innovativeness of entrepreneurs has a partial mediating effect on the relationship between learning orientation and organizational commitment. Third, using Baron & Kenny's hierarchical multiple regression analysis, we examined the moderating effect of career relevance among the relationships of learning orientation, innovativeness and organizational commitment. Third, because the interaction term was found to be positively significant, it was concluded there is a moderating effect of career relevance between learning orientation and innovativeness. This means, when career relevance was higher than average, the influence of learning orientation on innovation increases even more. Fourth, it was also found there is a moderating effect of career relevance between learning orientation and organizational commitment. However, the results of the mediated moderating effect analysis showed the moderating effect of career relevance between learning orientation and organization commitment is an indirect effect of moderating effect of career relevance between learning orientation and innovativeness mediated by innovativeness.

Good Life and Happiness as emotion: Focusing on the ideas of Pleasure alone(tongnak) and Sharing pleasure with the people(Yeomin-dongnak) in Chapter 1 of Mencius (행복감과 좋은 삶: 『맹자』, 「양혜왕」장의 독락(獨樂)과 여민동락(與民同樂)의 이해를 중심으로)

  • LEE, Chan
    • Journal of Korean Philosophical Society
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    • no.115
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    • pp.1-29
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    • 2016
  • I will critically argue the Mencian idea of sharing pleasure with the people in the light of happiness as emotion. Happiness as a subjective mental state can make troubles with good life in being at odds with real lives. Thus, what pursues genuine happiness goes back to a classical question of how one ought to live for good life over the subjective mental state. For this, I will focus on concepts of 'pleasure alone (tongnak)' and 'sharing pleasure with the people(yeomin-dongnak)', which can be seen in the dialogue between Mencius and King Xuan of Qi. I will show that king Xuan's pleasure as subjective happiness has discord with his good life because of the hierarchy of his desire. I will explain how to unify good life with pleasant one by the idea of sharing pleasure with the people provided by Mencius and examine certain dynamics of sympathy and mutual understanding under solidarity. Moreover, I will investigate how such power of sympathy as compassion can be connected with sharing pleasure with the people. Compassion and yeomin-dongnak can be captured by the golden rule of a measure to gauge others(shu). I will delve into how to differ from one another and summarize Confucian idea of yeomin-dongnak as happiness in terms of the theoretical frame related to good life(welfare). I briefly conclude how subjective happiness can contribute to making our lives better.

Landscape Composition Based on Placement and Harmony in the Namgea Suhwon (치(置)와 화(和)의 개념으로 분석한 남계서원의 경관짜임)

  • Rho, Jae-Hyun;Shin, Sang-Sup
    • Journal of the Korean Institute of Landscape Architecture
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    • v.37 no.4
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    • pp.72-85
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    • 2009
  • This study attempts to examine the principles of landscape composition for a 'Suhwon(書院)' and the meaning and value of its traditional landscape architecture, in order to apply the results to the design of modern landscape architecture. A 'Suhwon' is a vital space containing the form and meaning of human activity. This study analyzes the characteristics of landscape composition in the construction of the Namgea Suhwon, located in Hamyang, by examining the form and meaning of its area and composition. The Namgea Suhwon was constructed with a suitable configuration and harmony in a good location, neither field nor mountain, and which encompasses transcendence and a return after passage through a period of birth and abundance. Its appearance means 'life existence and hidden death(生居死幽)'. Its spatial system is a reflection of the idea of Samshinoje(三神五帝: The three abilities of Providence and its five subjects) connected with Ilsangje -Samshin -Ohje. It was built based on the idea of Biryebudong(非禮不動) meaning that one should follow only good decorum and avoid discourtesy, complying with "the frame of decorum" developed by the family rites of Chu Hsi. The environmental design of the Namgea Suhwon was interrupted by the material confrontation between mountains and water and a binary code system, such as front to rear, length to breadth, and movement to stillness. The design did not adhere to stiff axes, but pursued the harmonic principles of asymmetric balance in the building and the yard, which are very naturalistic. The name 'Namgea Suhwon' is closely related with the view of placement(置) and harmony(和), which are unified with the function and meaning formed by connecting Sung Confucianism with the Pungsu-Sasinsa structure in the layout of the grounds. When examining the D/H ratio of the building and yard, it can be seen that the spaces of Ganghak, Yusang and Jehyang were built appropriately, according to the natural characteristics of each space, such as a sense of openness, enclosure, tension, relief, enhancement, and hierarchical order. The spaces also reflect human scale concepts that take advantage of auditory features. The transition process after the construction of 'Namgea Suhwon' reveals the intentions of the builder to create an ecological landscape composition based on Placement and Harmony. Placement embodies' a purposeful space in which nature and the building are connected naturally, 'incomplete open space pursuing completion', and 'potential beauty in which tension and relaxation are repeated'. Harmony embodies 'order and continuity having a sense of unity with the natural environment' and the 'sharing of daily life and memory'. 'Namgea Suhwon' contains many ideas for landscape planning, land use and the design of a campus environment.

A Study on the Effect of SMEs' Organizational Culture and Self-Efficacy on Job Crafting and Job Satisfaction (소기업의 조직문화와 자기효능감이 잡 크래프팅과 직무만족도에 미치는 영향에 관한 연구)

  • Bae, Keun Soo;Heo, Ghul Moo
    • Asia-Pacific Journal of Business Venturing and Entrepreneurship
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    • v.16 no.5
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    • pp.109-124
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    • 2021
  • This study tried to verify the causal relationship that SMEs' organizational culture and self-efficacy would affect job crafting and job satisfaction. Unlike previous domestic studies that have been studied for organizational culture at the organizational level and self-efficacy at the individual level, this study tried to verify the interaction between job crafting and job satisfaction using different mechanisms as antecedent factors. In order to verify the research model of this study, questionnaires of 144 small and medium-sized enterprises (SMEs) workers located in Seoul and metropolitan areas were analyzed. Factor analysis and correlation analysis were performed to verify the reliability and validity of the research model on the relationship between variables, and empirical analysis was performed using regression analysis and mediation effect analysis to verify the hypothesis. The results of the study were first, that organizational culture and self-efficacy had a positive (+) effect on job crafting. On the other hand, relationship-oriented culture and hierarchical-oriented culture, which are sub-factors of organizational culture, were found to be insignificant. Second, organizational culture and self-efficacy were found to have a positive (+) effect on job satisfaction. On the other hand, it was found that market-oriented culture and hierarchical-oriented culture, which are sub-factors of organizational culture, were not significant. Third, job crafting was found to have a positive (+) effect on job satisfaction. On the other hand, it was found that the sub-factors of job crafting, disruptive job demands and social job resources, were not significant. This means that organizational culture partially affects job crafting and job satisfaction of SMEs, and job crafting also partially affects job satisfaction. The implications of this study are first, suggesting the meaning of SME organizational culture for stable and efficient human resource management for SMEs suffering from low productivity and high turnover rate. Second, it was meaningful to understand the possibility of introducing job crafting as an effective job management plan for SMEs. Third, in the current situation where there are few cases of practical introduction of job crafting, research on understanding job crafting for SMEs and improving job satisfaction is thought to be helpful in improving the productivity of SMEs.

Relationship Between the Psychosocial Factors and Job Stress Among Clerical Public Officers (일부 공무원들의 사회심리적 요인과 직무스트레스와의 관련성)

  • Park, Ho-Jin;Park, Sung-Kyeong;Cho, Young-Chae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.15 no.9
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    • pp.5610-5620
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    • 2014
  • This study was conducted to determine the levels of job stress, as well as its association with psychosocial factors (type A behavior pattern, locus of control, and self-esteem). Self-administered questionnaires were given to 634 clerical public officers in the C Provincial Office between February 18 and Mar. 10, 2013. As a result, the job stress levels of the subjects was significantly different according to age, sex, educational level, marital status, job position, job career, satisfaction in job life, smoking, alcohol drinking, sleeping time, type A behavior pattern, locus of control, and self-esteem. Regarding the correlation of job stress and psychosocial factors, the level of job demand was negatively correlated with the internal locus of control. The decision latitude was negatively correlated with the type A behavior pattern, internal locus of control and self-esteem. Supervisor support was negatively correlated with the external locus of control. In hierarchial multiple regression analysis, the affecting factors to the job stress selected variables, such as age, subjective health status, job position, overtime work, experience of sick absence, satisfaction in work, sleeping time, leisure time, visiting out-patient department, type A behavior pattern, locus of control, and self-esteem, and the explanatory powers of these factors was 32.1%. In particular, the factors related to the psychosocial factors (type A behavior pattern, locus of control, self-esteem) were strongly related to the job stress, increasing the explanation of factors up to 15.0%.

Effects of Stress and Personality Characteristics on Sleep (스트레스와 성격요인이 수면에 미치는 영향)

  • Yoon, Ho-Kyoung;Kang, Seung-Gul;Ham, Byung-Joo;Lee, Heon-Jeong;Kwon, Ho-In;Suh, Kwang-Yoon;Kim, Leen
    • Sleep Medicine and Psychophysiology
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    • v.10 no.1
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    • pp.32-38
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    • 2003
  • Objectives: The purpose of this study is to investigate the effects of stress and personality on sleep patterns, and further, to identify potential correlations between stress and personality characteristics. Methods: A total of 174 healthy college students were subjects for this study. Participants filled out the Daily Stress Inventory before sleep and the Modified Pittsburgh Sleep Quality Index after sleep on three consecutive days. They also filled out the 16 Personality Factor Questionnaire (16-PF), BDI (Beck Depression Inventory) and STAI (State-Trait Anxiety Inventory). Results: Minor stresses highly correlated with subjective sleep quality and symptoms of non-restorative sleep. However, total sleep time, sleep latency, awakening frequency, and frequency of dreams were not explained by stress scores. The O (guilty feeling), C (low ego strength) and Q4 (high anxiety) factors of the 16-PF also highly correlated with symptoms of non-restorative sleep and significantly affected sleep patterns. BDI and STAI scores also correlated with the above personality factors and minor stresses. Conclusion: This study showed that minor stresses impaired the restorative effects of sleep. Personality characteristics such as low ego strength, high levels of anxiety, and feelings of guilt were vulnerable to minor stresses. Minor stress, various personality characteristics, different coping patterns, and emotional response are highly correlated with each other and affect sleep patterns.

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The Effect of Social Network on Information Sharing in Franchise System (프랜차이즈시스템의 사회연결망 특성이 정보공유에 미치는 영향)

  • Yun, Han-Sung;Bae, Sang-Wook;Noh, Jung-Koo
    • Journal of Distribution Research
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    • v.16 no.2
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    • pp.95-118
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    • 2011
  • The purpose of this study is as follows. First, we investigate empirically the effects of social network properties such as social network density and centrality of a franchisee on its information sharing with various subjects such as the franchisor and other franchisees in the franchise system. Second, we examine exploratively if tie strength between a franchisee and its franchisor plays a moderating role on the relationship between social network properties and information sharing. The study model was established as shown in

    . We gathered 200 data from franchisees in Busan through a questionnaire survey and used 189 data for our purpose. To improve the quality of data, we selected respondents from the franchisees' owners or managers that had contacted often with their franchisor and other franchisees in the franchise system. Our data analysis began with reliability analysis, exploratory and confirmatory factor analysis, on the multi-item measures of social network density, social network centrality, tie strength, information sharing and control variables such as shared goals and ownership to assess the reliability and validity of those measures. The results were shown that the presented values satisfied the general criteria for reliability and validity. We tested our hypotheses using a hierarchical multiple regression analysis in four steps. Model 1 regressed the dependent variable(information sharing) only on control variables(shared goals, ownership). Model 2 added main effect variables(social network density, social network centrality) in Model 1. Model 3 added a moderating variable(tie strength) in Model 2. Finally, Model 4 added interaction terms between the main variables and the moderating variable in Model 3. We used a mean-centering method for the main variables and the moderating variable to minimize the multicollinearity problem due to the interaction terms in Model 4. Two important empirical findings emerge from this study. In other words, the effects of social network properties and tie strength on a franchisee's information sharing depend on subject types such as the franchisor and other franchisees in franchise system. First, social network centrality, tie strength, the interaction between social network density and tie strength and the interaction between social network centrality and tie strength all affect significantly a franchisee's information sharing with its franchisor. By the way, the interaction between social network centrality and tie strength has a negative effect on its information sharing while the interaction of social network density and tie strength has a positive effect on its information sharing. Second, both social network centrality affects significantly and directly a franchisee's information sharing with other franchisees in the franchise system. However, there does not exist the moderating role of tie strength in the second case. Finally, we suggest the implications of our findings and some avenues for future research.

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