• Journal of Gastric Cancer
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• v.22 no.2
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• pp.120-134
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• 2022

Purpose: This study aimed to identify prognostic factors for patients with distant lymph node-involved gastric cancer (GC) using a machine learning algorithm, a method that offers considerable advantages and new prospects for high-dimensional biomedical data exploration. Materials and Methods: This study employed 79 features of clinical pathology, laboratory tests, and therapeutic details from 289 GC patients whose distant lymphadenopathy was presented as the first episode of recurrence or metastasis. Outcomes were measured as any-cause death events and survival months after distant lymph node metastasis. A prediction model was built based on possible outcome predictors using a random survival forest algorithm and confirmed by 5×5 nested cross-validation. The effects of single variables were interpreted using partial dependence plots. A contour plot was used to visually represent survival prediction based on 2 predictive features. Results: The median survival time of patients with GC with distant nodal metastasis was 9.2 months. The optimal model incorporated the prealbumin level and the prothrombin time (PT), and yielded a prediction error of 0.353. The inclusion of other variables resulted in poorer model performance. Patients with higher serum prealbumin levels or shorter PTs had a significantly better prognosis. The predicted one-year survival rate was stratified and illustrated as a contour plot based on the combined effect the prealbumin level and the PT. Conclusions: Machine learning is useful for identifying the important determinants of cancer survival using high-dimensional datasets. The prealbumin level and the PT on distant lymph node metastasis are the 2 most crucial factors in predicting the subsequent survival time of advanced GC.

• Journal of Nutrition and Health
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• v.56 no.1
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• pp.86-96
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• 2023

Purpose: This study analyzes the association between depression, emotional eating, and dietary practices, and investigates the mediating effects of emotional eating between depression and dietary practice. Methods: A total of 345 women aged 40-59 years participated in the Seoul and Gyeonggido region. Assessments were achieved by self-reported questionnaires for emotional eating (Dutch Eating Behavior Questionnaire), Nutrition Quotients (NQ), and depression (Patient Health Questionnaire-9). Results: Analyzing the NQ scores by considering the depression group, revealed that compared to the normal group, balance, diversity, and eating behavior scores were lower in the depression group, whereas the moderation score was lower in the borderline depression group and depression group. The emotional eating scores were determined to be higher in the depression group than in the normal group. Partial correlation analysis between depression, emotional eating, and NQ revealed that depression is positively correlated with emotional eating and negatively correlated with all other factors of the nutrition quotient, balance, diversity, moderation, and eating behavior. Among the nutrition quotient factors considered, emotional eating was determined to be negatively correlated with both diversity and moderation. The bootstrapping method was applied to analyze the mediating effect of emotional eating for determining the association between depression and NQ. Results indicate that among the nutrition quotient factors evaluated using emotional eating as a medium, depression exerted a negative effect on moderation. Conclusion: Results of this study confirm that emotional eating, as a medium, affects the intake of unhealthy foods especially when depression is associated with dietary practices.

• Journal of the Korean Society for Library and Information Science
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• v.57 no.2
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• pp.151-178
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• 2023

The purpose of this study is to investigate the effect of school library reading classes on the convergence literacy of adolescents based on the convergence reading education model. To achieve this, elements of convergence education for future-oriented competence were derived from the level of reading education based on previous studies and literature, and the effectiveness of education was measured by conducting a convergence literacy test targeting 50 general high school students. In this study, reading classes and tests were conducted over 12 sessions from April 2022 to November 2022, and the study participants were divided into two groups, and convergence reading education and self-reading education were applied respectively. The analysis results of this study are as follows. First, It was verified that there was a significant difference in the promotion of convergent literacy of adolescents according to the method of reading education. Second, it was verified that convergence reading education had a significant effect on convergence literacy of adolescents such as convergence, creativity, self-direction and communication ability. Third, as a result of verifying whether learning motivation plays a mediating role in convergence reading education influencing convergent literacy, learning motivation played a partial mediating role and had an indirect effect on creativity, self-direction, and communication ability between convergence reading education and convergence literacy, but showed no significant mediating effect on convergence ability.

• 한국노년학
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• v.29 no.1
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• pp.101-116
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• 2009

With increasing elderly living with diabetes, health professionals have focused on the relations between behaviors improving health status and life satisfaction. This research attempts to explain the influence of the health promotion behaviors on the life satisfaction of the elderly with diabetes. Also, we are focusing whether there is a mediating effect of depression between health promotion behaviors and life satisfaction of the elderly with diabetes. 685 persons with diabetes over 60 years of age were selected from the data of KLoSA (Korean Longitudinal Study of Ageing), administered by The National Institute of Labor in 2006. Life satisfaction was measured by 5 items: health status, economic status, relationship with a spouse, relationship with children, and the quality of life. Health promotion behaviors were measured by 4 items: regular diet, exercise, smoking, and drinking. The mediating variable is the depression measured by CES-D10. As the method of analysis, the multiple regressions were used with SPSS 12.0. The result of the study shows that the health promotion behaviors have a positive influence on life satisfaction and a negative influence on depression. It was also verified that the depression variable has a partial mediating effect between health promotion behaviors and life satisfaction. These results present the importance of integrated (physical, psychological, and social) approach for the health promotion experts intervening with the elderly with diabetes.

• Korean Journal of Social Welfare Studies
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• v.42 no.4
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• pp.389-412
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• 2011

The purpose of this study is to closely examine causality on the married-working women's depression. For this, the analytical materials were used the primary Seoul Metropolis Welfare Panel survey data. 507 married-working women in their 20s~50s were selected among survey subjects of Seoul Metropolis Welfare Panel data. The analytical method was used the structural equation model. As a result of analysis, it could be known that the path of perfect mediating effect in depression was formed after passing through the benefits satisfaction and the marital happiness from gender role attitude in the married-working women and that the benefits satisfaction has the partial mediating effect between depression and marital happiness. Suggesting a plan for getting rid of depression in the married-working women based on the results of this study, first of all, the married-working women's depression is greatly accredited to what our society regards domestic work yet as woman's role. Thus, the policy-based measure is demanded that can support for working women to be possibly compatible in work and family life and that can induce men's participation in household affairs and child-rearing in such context. Second, it was indicated that the more the married-working women adhere strictly to the gender role attitude of traditionalism, the lower result the marital happiness and benefits satisfaction have. Considering this, a plan for activating welfare system and family-friendly system is demanded that can change gender role value in traditionalism, which is being left in our society. Third, to promote marital happiness that has great influence upon the married-working women's depression, there is a need of seeking a plan, which further intensifies the family services including the marital education and the parent education.

• Journal of Venture Innovation
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• v.4 no.1
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• pp.67-86
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• 2021

The purpose of this study was to examine the effects of office workers' covert narcissism on organizational silence and identify the (Duel)mediation effects on fear of negative evaluation and the avoidance motivation. This study used a survey of 393 office workers to measure the covert narcissism, the organizational silence, the fear of negative evaluation and the avoidance motivation. The collected data were analyzed by IBM SPSS 23 and SPSS PROCESS macro in a Bootstrapping method. The result shows that the covert narcissism, the organizational silence, the fear of negative evaluation and the avoidance motivation have positive correlations. In addition, a simple regression analysis was used according to the research model and all of them showed adequate coefficient of determination between each variables. Next, the mediating model was verified by mediation of the fear of negative evaluation and the avoidance motivation. In the relationship between the covert narcissism and the organizational silence, the mediating effect of the fear of negative evaluation was not verified and the avoidance motive showed a partial mediating effect. Finally, in the relationship between the covert narcissism and the organizational silence, the fear of negative evaluation and the avoidance motivation were gradually mediated through the (Duel)mediation effects model, and the model was statistically significant. Through this study, The implications of this study were discussed, not only the limitations of the study but also the necessity of further research were discussed.

• Asia-Pacific Journal of Business Venturing and Entrepreneurship
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• v.8 no.3
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• pp.53-65
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• 2013

In Korea recently the consumption of coffee has been drastically increased and majority of people who are more than $20^{th}$ are drinking more than a cup of coffee every day. Nowadays coffee a kind of essential items in modern urban society. As the popularity of the coffee is increasing, As the coffee consumption is growing, the studies on coffee also have been increased. Many of the studies on coffee were focused on the consumer attitudes, coffee shops and franchise coffee shops, and coffee components or ingredients. As the products of the coffee are becoming diverse, the consumers of coffee also becoming diverse. There was a study showing that coffee has variety of types, and that motivations and attitudes for coffee consumption are different depend on demographic statistics such as age and life styles. On this study main focus was life style and consumer's motivation on coffee consumption. For this study the survey was conducted on the people living in Seoul City and Kyengkido from March 1, 2013 to March 31, 2013. 600 questionnaires were distributed and 480 were collected and 470 were used for analysis of this study. The statistics program used in this study was SPSS. The method used in the analysis wee factors analysis test, reliability test, validity test, t-testy, One-Way ANOVA, and regression analysis. In this study according to the factor analysis, the life styles were classified the following six categories ; wellbeing pursuit, taste pursuit, atmosphere pursuit, dine-out pursuit, instant pursuit, and economic value pursuit. The factors of coffee consumption motivation were 6; wellbeing consumption motivation, changing mood consumption motivation, social consumption motivation, habitual consumption motivation, and emotional consumption motivation. The demographic factors used in this study were age, marital status, occupation, educational background, residence, income, and eating-out expenses. The hypothesis used in this study were two. The first hypo-thesis was whether the coffee consumption was affected by the life styles. The second hypo-thesis was whether there was any statistical differences on the motivation of coffee consumption according to the characteristics of life style. The outcome of this study demonstrated that life styles had partial impact on coffee consumption motivations. According to the characteristics of the life style, except for the habitual consumption motivation, all the other factors showed statistical differences on coffee consumption motivations according the characteristics of life styles.

• Journal of Distribution Research
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• v.15 no.3
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• pp.71-110
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• 2010

1. Introduction Today Internet is recognized as an important way for the transaction of products and services. According to the data surveyed by the National Statistical Office, the on-line transaction in 2007 for a year, 15.7656 trillion, shows a 17.1%(2.3060 trillion won) increase over last year, of these, the amount of B2C has been increased 12.0%(10.2258 trillion won). Like this, because the entry barrier of on-line market of Korea is low, many retailers could easily enter into the market. So the bigger its scale is, but on the other hand, the tougher its competition is. Particularly due to the Internet and innovation of IT, the existing market has been changed into the perfect competitive market(Srinivasan, Rolph & Kishore, 2002). In the early years of on-line business, they think that the main reason for success is a moderate price, they are awakened to its importance of on-line service quality with tough competition. If it's not sure whether customers can be provided with what they want, they can use the Web sites, perhaps they can trust their products that had been already bought or not, they have a doubt its viability(Parasuraman, Zeithaml & Malhotra, 2005). Customers can directly reserve and issue their air tickets irrespective of place and time at the Web sites of travel agencies or airlines, but its empirical studies about these Web sites for reserving and issuing air tickets are insufficient. Therefore this study goes on for following specific objects. First object is to measure service quality and service recovery of Web sites for reserving and issuing air tickets. Second is to look into whether above on-line service quality and on-line service recovery have an impact on overall service quality. Third is to seek for the relation with overall service quality and customer satisfaction, then this customer satisfaction and loyalty intention. 2. Theoretical Background 2.1 On-line Service Quality Barnes & Vidgen(2000; 2001a; 2001b; 2002) had invented the tool to measure Web sites' quality four times(called WebQual). The WebQual 1.0, Step one invented a measuring item for information quality based on QFD, and this had been verified by students of UK business school. The Web Qual 2.0, Step two invented for interaction quality, and had been judged by customers of on-line bookshop. The WebQual 3.0, Step three invented by consolidating the WebQual 1.0 for information quality and the WebQual2.0 for interactionquality. It includes 3-quality-dimension, information quality, interaction quality, site design, and had been assessed and confirmed by auction sites(e-bay, Amazon, QXL). Furtheron, through the former empirical studies, the authors changed sites quality into usability by judging that usability is a concept how customers interact with or perceive Web sites and It is used widely for accessing Web sites. By this process, WebQual 4.0 was invented, and is consist of 3-quality-dimension; information quality, interaction quality, usability, 22 items. However, because WebQual 4.0 is focusing on technical part, it's usable at the Website's design part, on the other hand, it's not usable at the Web site's pleasant experience part. Parasuraman, Zeithaml & Malhorta(2002; 2005) had invented the measure for measuring on-line service quality in 2002 and 2005. The study in 2002 divided on-line service quality into 5 dimensions. But these were not well-organized, so there needed to be studied again totally. So Parasuraman, Zeithaml & Malhorta(2005) re-worked out the study about on-line service quality measure base on 2002's study and invented E-S-QUAL. After they invented preliminary measure for on-line service quality, they made up a question for customers who had purchased at amazon.com and walmart.com and reassessed this measure. And they perfected an invention of E-S-QUAL consists of 4 dimensions, 22 items of efficiency, system availability, fulfillment, privacy. Efficiency measures assess to sites and usability and others, system availability measures accurate technical function of sites and others, fulfillment measures promptness of delivering products and sufficient goods and others and privacy measures the degree of protection of data about their customers and so on. 2.2 Service Recovery Service industries tend to minimize the losses by coping with service failure promptly. This responses of service providers to service failure mean service recovery(Kelly & Davis, 1994). Bitner(1990) went on his study from customers' view about service providers' behavior for customers to recognize their satisfaction/dissatisfaction at service point. According to them, to manage service failure successfully, exact recognition of service problem, an apology, sufficient description about service failure and some tangible compensation are important. Parasuraman, Zeithaml & Malhorta(2005) approached the service recovery from how to measure, rather than how to manage, and moved to on-line market not to off-line, then invented E-RecS-QUAL which is a measuring tool about on-line service recovery. 2.3 Customer Satisfaction The definition of customer satisfaction can be divided into two points of view. First, they approached customer satisfaction from outcome of comsumer. Howard & Sheth(1969) defined satisfaction as 'a cognitive condition feeling being rewarded properly or improperly for their sacrifice.' and Westbrook & Reilly(1983) also defined customer satisfaction/dissatisfaction as 'a psychological reaction to the behavior pattern of shopping and purchasing, the display condition of retail store, outcome of purchased goods and service as well as whole market.' Second, they approached customer satisfaction from process. Engel & Blackwell(1982) defined satisfaction as 'an assessment of a consistency in chosen alternative proposal and their belief they had with them.' Tse & Wilton(1988) defined customer satisfaction as 'a customers' reaction to discordance between advance expectation and ex post facto outcome.' That is, this point of view that customer satisfaction is process is the important factor that comparing and assessing process what they expect and outcome of consumer. Unlike outcome-oriented approach, process-oriented approach has many advantages. As process-oriented approach deals with customers' whole expenditure experience, it checks up main process by measuring one by one each factor which is essential role at each step. And this approach enables us to check perceptual/psychological process formed customer satisfaction. Because of these advantages, now many studies are adopting this process-oriented approach(Yi, 1995). 2.4 Loyalty Intention Loyalty has been studied by dividing into behavioral approaches, attitudinal approaches and complex approaches(Dekimpe et al., 1997). In the early years of study, they defined loyalty focusing on behavioral concept, behavioral approaches regard customer loyalty as "a tendency to purchase periodically within a certain period of time at specific retail store." But the loyalty of behavioral approaches focuses on only outcome of customer behavior, so there are someone to point the limits that customers' decision-making situation or process were neglected(Enis & Paul, 1970; Raj, 1982; Lee, 2002). So the attitudinal approaches were suggested. The attitudinal approaches consider loyalty contains all the cognitive, emotional, voluntary factors(Oliver, 1997), define the customer loyalty as "friendly behaviors for specific retail stores." However these attitudinal approaches can explain that how the customer loyalty form and change, but cannot say positively whether it is moved to real purchasing in the future or not. This is a kind of shortcoming(Oh, 1995). 3. Research Design 3.1 Research Model Based on the objects of this study, the research model derived is