• Journal of Korean Academy of Nursing
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• v.39 no.2
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• pp.229-236
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• 2009

Purpose: This study was a secondary analysis to verify the mediating role of organizational citizenship behavior (OCB) between organizational justice (OJ) and organizational effectiveness (OE) in nursing organizations. Methods: The RN-BSNs and their colleagues in Seoul and Busan were subjects. The data was collected for 20 days between September 13 and October 2, 2004. Two hundred eighty three data sets were used for the final analysis. The fitness of models were tested using AMOS 5. Results: The fitness of hypothetical model was moderate. Procedural Justice (PJ), Interaction Justice (IJ) and Distributive Justice (DJ) had direct effects on Job Satisfaction (JS), Organizational Commitment (OC) and Turnover Intention (TI) in OE, and indirect effects on JS, OC and TI mediated by OCB. The modified model improved with ideal fitness showed the causal relations among OE. In modified model, PJ, IJ and DJ had direct positive effects on OCB and JS and OC in OE, and indirect effects on JS and OC mediated by OCB. JS and OC in OE had a direct negative effect on TI. Conclusion: OCB mediated the relationship between OJ and OE, so the nursing managers should enhance OCB of the nurses in order to improve OE.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.3
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• pp.37-42
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• 2011

Nowadays software developers are moving from conventional software process technologies to the object-oriented paradigm. To develope the object-oriented softwares efficiently, various software metrics have been suggested. Coupling refers to the degree of independence between components of the system. It has long been well known that good software practice calls for minimizing coupling interaction. Many researches have been studied coupling metrics of the object- oriented systems. We review Chidamber and Kemerer's work & Li's work. In this paper, we study the coupling of the overall structures of object-oriented systems by analyzing the class diagram of UML. We propose four coupling metrics for object-oriented softwares. First, we use an established coupling metric for object- oriented systems as a basic coupling metric. Then we modify the basic coupling metric by including indirect coupling between classes, We also suggest two relative coupling metrics to measure coupling between subsystems. We investigate the theoretical soundness of the proposed metrics by the axioms of Briand et al. Finally, we apply the presented metrics to a practical case study. This coupling metric will be helpful to the software developers for their designing tasks by evaluating the coupling metric of the structures of object-oriented system and redesigning tasks of the system.

• Smart Structures and Systems
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• v.25 no.3
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• pp.265-277
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• 2020

Recently, the concept of "drive-by" bridge monitoring system using indirect measurements from a passing vehicle to extract key parameters of a bridge has been rapidly developed. As one of the most key parameters of a bridge, the natural frequency has been successfully extracted theoretically and in practice using indirect measurements. The frequency of bridge is generally calculated applying Fast Fourier Transform (FFT) directly. However, it has been demonstrated that with the increase in vehicle velocity, the estimated frequency resolution of FFT will be very low causing a great extracted error. Moreover, because of the low frequency resolution, it is hard to detect the frequency drop caused by any damages or degradation of the bridge structural integrity. This paper will introduce a new technique of bridge frequency extraction based on Hilbert Transform (HT) that is not restricted to frequency resolution and can, therefore, improve identification accuracy. In this paper, deriving from the vehicle response, the closed-form solution associated with bridge frequency removing the effect of vehicle velocity is discussed in the analytical study. Then a numerical Vehicle-Bridge Interaction (VBI) model with a quarter car model is adopted to demonstrate the proposed approach. Finally, factors that affect the proposed approach are studied, including vehicle velocity, signal noise, and road roughness profile.

• Geomechanics and Engineering
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• v.16 no.5
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• pp.559-567
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• 2018

Technological innovations in sustainable materials for soil improvement have attracted considerable interest due to energy crisis and environmental concerns in recent years. This study presents results of a comprehensive investigation on utilization of nanocarbons in reinforcement of a residual soil mixed with 0, 10 and 20% bentonite. Effects of adding proportionate quantities (0, 0.05, 0.075, 0.1 and 0.2%) of carbon nanotubes and carbon nanofibers to soil samples of different plasticities were evaluated. The investigation revealed that the inclusion of nanocarbons into the soil samples significantly improved unconfined compressive strength, Young's modulus and indirect tensile strength. It was observed that carbon nanofibers showed better performance as compared to carbon nanotubes. The nanosized diameter and high aspect ratio of nanocarbons make it possible to distribute the reinforcing materials on a much smaller scale and bridge the inter-particles voids. As a result, a better 'soil-reinforcing material' interaction is achieved and desired properties of the soil are improved at nanolevel.

• Journal of Distribution Science
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• v.16 no.4
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• pp.49-56
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• 2018

Purpose - The purpose of this study is to provide managerial implications for retail brand managers. Specifically, current study divide donation type into direct donation(e.g., corporate philanthropy) and indirect donation(cause-related marketing) and investigate the donation type on the purchase intention. Also, this research intends to provide the mechanism between the donation type on the purchase intention by showing the mediating role of the consumers' perceived warmth. Moreover, the moderating role of the brand type(non-luxury vs. luxury brand) between the donation type, the warmth perception, and the purchase intention will be examined. Research design, data, and methodology - A total of 174 undergraduate students from a university in Korea were recruited and were randomly assigned to the conditions of a 2(donation type: indirect vs. direct) X 2 (brand type: non-luxury vs. luxury) between-subjects design. The hypotheses were tested using SPSS 21.0. Two-way ANOVA and multiple regression analysis were performed. Results - Empirical results showed that the consumers' perceived warmth was higher in the direct donation condition than the indirect donation condition and moreover this influence of the donation type on the perceived warmth was moderated by the brand type. Specifically, the influence of donation type on the perceived warmth was significant only for luxury brand. And there is an interaction effect of donation type and brand type on the purchase intention. More specifically, the purchase intention for luxury brand was higher in the direct donation condition than the indirect donation condition whereas the purchase intention for non-luxury brand was higher in the indirect donation condition than in the direct donation condition. Conclusions - This research contributed to the CSR literature of retail brand management by showing that the influence of the donation type and the brand type on the purchase intention. Moreover, this study enriched CSR literature by introducing Stereotype Content Model and showing the mediating role of the consumers' perceived warmth. Managerially, these results suggested retail brand managers of non-luxury brand and luxury brand how to select an appropriate type of donation and conduct CSR strategies.

• The Journal of the Korea Contents Association
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• v.14 no.11
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• pp.519-532
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• 2014

The emerging technologies for the natural computer interaction can give manufacturers new opportunities of product innovation. This paper is the study on a method of human communication about a finger gestures interaction. As technological advance has been so rapid over the last few decades, the utilizing products or services will be soon popular. The purpose of this experiment are as follows; What is the usefulness of gesture interaction? What is the cognitive impact on gesture interaction users. The finger gestures interaction consist of poking, picking and grasping. By measuring each usability in 2D and 3D space, this study shows the effect of finger gestures interaction. The 2D and 3D experimental tool is developed by using LeapMotion technology. As a results, the experiments involved 48 subjects shows that there is no difference in usability between the gestures in 2D space but in 3D space, the meaningful difference has been found. In addition, all gestures express good usability in 2D space rather than 3D space. Especially, there are the attractive interest that using uni-finger is better than multi-fingers.

• Journal of Internet Computing and Services
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• v.13 no.2
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• pp.119-126
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• 2012

The purpose of this study is to test the motivations for e-Learning service usage of smart device users. To do this, empirical data were collected by conducting a field survey with 382 smart-device based e-learners, and structural equation model was used for the purpose of analyzing the data acquired by the survey. A structural equation model was designed and constructed by such factors like usefulness, enjoyment, word-of-mouse(WOM) effect, and social interaction on e-Learning usage intention. In addition, social interaction has an influence on WOM effect. The results of the analysis are summarized as follows; first, usefulness, enjoyment, and WOM have direct effects on e-Learning usage intention. Second, social interaction not only has direct influence on e-Learning usage intention but also has indirect influence carried by WOM effect. The findings have significant implications which the study inquires into the factors for e-Learning usage motivations of smart-device based e-learners.

• Journal of Digital Convergence
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• v.10 no.2
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• pp.109-119
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• 2012

MMORPG online game business has emerged as the most lucrative entertainment industry, with over 10 million gamers in South Korea. It appears that in this extremely attractive and growing services segment, academics, as well as practitioners, would benefit from investigating the relationships among the players' attachment or affection, game contents-related and social interaction-related construct. We assume that game contents-related construct consists of storytelling, game-play method, contents-diversity and the sense of identification, and that social interaction-related construct includes information-sharing, gamers' empowerment and the word-of-mouth. Based on data collected from online questionnaire survey, the validity of the research model has been tested. The results show that contents-related construct influences the players' attachment, and that social interaction-related construct has no direct impact on the attachment. But social interaction-related construct has been shown to influence contents-related construct, implying the indirect impact on the players' attachment.

• Korean journal of communication and information
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• v.38
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• pp.119-146
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• 2007

The purpose of this paper is to explore the factors causing adolescents' habitual use of text-based online social interaction (TOSI). The authors of the present study assumed that adolescents' perceived intimacy would affect the use of TOSI. Using structural equation modeling, the influences of perceived social presence and Internet self-efficacy on habitual use of TOSI were examined indirectly as well as directly, with and without intimacy as a mediate factor. The results show that the indirect effects were proven to be stronger compared with the direct effects. Perceived intimacy appeared to encourage more frequent uses of TOSI. The effects of intimacy were even more stronger especially with those who had higher levels of Internet self-efficacy.

• Clinical Nutrition Research
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• v.13 no.3
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• pp.214-225
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• 2024

Polymorphisms in the melanocortin 4 receptor (MC4R) gene with occurrence and progression of chronic diseases such as obesity and cardiovascular disease (CVD) have long been addressed but there is a lack of evidence for complex interrelationships, including direct and indirect effects of these variables. This review specifically focuses on studying the effects of healthy diet interaction and MC4R polymorphisms on the development of CVD. The quantity and quality of carbohydrates and proteins consumed are related to obesity susceptibility and cardiometabolic risk factors. A healthy dietary pattern such as a Mediterranean dietary can modulate the association between MC4R polymorphisms (rs17782313) and the risk of CVDs. Also, the Nordic diet can reduce lipid profiles such as low-density lipoprotein cholesterol (LDL-C) and total cholesterol levels. On the other hand, MC4R interaction with the dietary inflammatory index decreases high-density lipoprotein cholesterol levels and increases LDL-C and triglyceride (TG) levels. Additionally, the DASH diet decreases TG, atherogenic index of plasma, systolic blood pressure, diastolic blood pressure, and serum glucose. The interaction between MC4R genes and diets plays an important role in the development of CVD. Adherence to healthy diets such as the Mediterranean, Nordic, Anti-inflammatory, and Dash diets might be an efficient strategy to prevent CVD. The potential for personalized diets to be developed for the treatment and prevention of CVD and its related comorbidities is expected to expand as this field develops.