• Journal of the Korea Society of Computer and Information
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• v.15 no.8
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• pp.51-58
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• 2010

Programming education needs learning which is adjusted individual learners' level of their learning abilities. Recommendation system is one way of implementing personalized service. In this research, we propose recommendation method which learning items are recommended for individual learners' learning in web-based programming education environment by. Our proposed system for leveled programming education provides appropriate programming problems for a certain learner in his learning level and learning scope employing collaborative filtering method using learners' profile of their level and correlation profile between learning topics. As a result, it resolves a problem that providing appropriate programming problems in learner's level, and we get a result that improving leaner's programming ability. Furthermore, when we compared our proposed method and original collaborative filtering method, our proposed method provides the ways to solve the scalability which is one of the limitations in recommendation systems by improving recommendation performance and reducing analysis time.

• Korean Journal of Optics and Photonics
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• v.25 no.5
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• pp.254-261
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• 2014

Two types of white light-emitting diodes (LEDs) with different phosphor structures were fabricated and compared in terms of their optical characteristics. Their spectroscopic properties were analyzed as a function of temperature, from room temperature to $80^{\circ}C$. The temperature dependence of the luminance and the color coordinates showed that the decrease in luminance and change in the color coordinates of the remote-phosphor type LED were much smaller compared to the conventional white LED. These improvements were attributed to the decrease in phosphor temperature, due to the distance between the LED chip and the phosphor layer, as well as to the reduced absorption by the LED chip of the light emitted from the phosphor layer.

• Journal of Digital Convergence
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• v.8 no.4
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• pp.137-150
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• 2010

This study is to investigate the effects of medical service quality and service value by relationship on customer behaviors. The empirical findings of this study are summarized as follows. First, the findings on effects of medical service quality on relationship quality showed that rise in medical service quality resulted in a significant rise in relationship quality. Second, the findings on effects of service value on relationship quality verified that rise in service value had positive(+) impacts on relationship quality. Third, the findings on effects of relationship quality on customer behaviors verified that relationship quality had significant impacts on customer behaviors. Lastly, the findings of relationship with medical service quality, service value, and customer behaviors verified that relationship quality served as a parameter. The findings from the above study show that dental medical institutions have to seek more differentiated and various service strategies, continue to develop consistent service methods to meet customer's expectation, and enhance the reliability of customers in dental medical institutions in order to maximize the results of customer behaviors.

• Journal of Digital Convergence
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• v.16 no.7
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• pp.189-198
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• 2018

Automotive parts distribution industry focused on increasing sales by product quality until early 2010, but as competition has recently intensified, each company has become interested in core values such as customer satisfaction, trust and loyalty. Therefore, effect of customer-oriented service mindset should be analyzed for the relationship between service quality and customer satisfaction, trust, and loyalty in this industry. For this, a questionnaire survey was conducted for 342 distributors. Structural equation models were analyzed using AMOS 23.0. Empirical results show service quality has positive effects on customer loyalty, and customer satisfaction and trust mediate between service quality and customer loyalty. The service quality became a key factor to elicit customer satisfaction, trust and loyalty. Following studies, it is expected to enhance service quality focusing on extending region coverages.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.209-214
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• 2020

In terms of population structure, korea military power has entered a serious danger zone, and that birth rate has led not only to a decrease in the population of the nation's economic activity, but also to a decrease in troop resources in our last security bastion, and the trend of "children from multicultural families" joining the army is predicted to soon become a "cultural force" with an average of 8,000 troops expected to join the army between 2025 and 2031. After all, the seriousness of the problem of declining troop resources in the military organization, the nation's last security bastion, and the multicultural army will be added. Therefore, this study reveals how multicultural soldiers are adapting to military service and analyzes them in depth by categorizing a series of processes on military life adaptation.

• Journal of the Korean Association of Geographic Information Studies
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• v.10 no.2
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• pp.36-46
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• 2007

The primary purpose of this study is to identify the characteristics of land use change at the urban fringe. For this purpose, the Daegu Metropolitan City is selected as a study area. Land use changes between 1990 and 2000 in fringe areas are identified by processing Landsat TM5 imageries. The main findings are follows: First, land development has been driven by residential development, especially large-scale residential development encouraged by the two-million housing construction plan. Second, the type and size of the land use conversion are not identical across the study area. For example, the main land use type of the newly developed area of Buk-gu is residential use while that of Suseong-gu is public use. Third, most of residential development type is a high-density development which is quite different from American type of low-density development.

• Management & Information Systems Review
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• v.30 no.4
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• pp.441-474
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• 2011

This purpose of this study is to examine the relationships of ethical leader and ethics management system with employees's organizational citizenship behavior and the mechanism underlying these relationships. A questionnaire survey was conducted involving 1,035 full-time employees from large and medium industries in Daegu and Gyeong-buk provinces. Regression analysis was used to test the hypotheses. The results showed that both of ethical leader and ethics management system were positively related with employees's organizational citizenship behavior. As expected, these relationships were mediated by organization-oriented ethical climate and social responsibility-oriented ethical climate respectively. The findings of this study are as followings: First, employees tend to show their pro-social behavior when they perceive their leaders act ethically and ethics management is well institutionalized. Second, building up the organization-oriented ethical climate and social responsibility-oriented ethical climate can be a powerful strategy to enhance employees's organizational citizenship behavior.

• Korean Journal of Social Welfare
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• v.57 no.4
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• pp.91-118
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• 2005

This paper examines the impact of the institutional complementarity between welfare regimes and production regimes on income inequality. Using comparative welfare data by various sources for 14 OECD nations from 1980 to 1997, this paper attempts to answer two questions. First, is there a institutional complementary in regulatory process between distribution and production? Second, if it is correct, what kind of causal structure do we predict? Panel Corrected Standard Errors(PCSE) model, a data analysis method in pooled cross-sectional time-series, is employed to examine the interaction effects between the two variables: coordination in the sphere of distribution; coordination in the sphere of production The evidence suggest that there are powerful interaction effects between distributive coordination and production coordination and that the institutional complementary has effects on income inequality. First, the income inequality effect of coordination in the sphere of distribution becomes less positive(more negative) as coordination in the sphere of production increases. Second, the income inequality effect of coordination in the sphere of production becomes less positive(more negative) as coordination in the sphere of distribution increases.

• Korean Journal of Social Welfare
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• v.63 no.1
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• pp.113-135
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• 2011

As intense economic competition has led to more flexibility in the labor market, marginal or atypical employment has rapidly grown. Although marginal work represents an important proportion of whole employment, it is still characterized by insecure and unfavorable working conditions. Therefore employees in marginal jobs are highly likely to be subject to social exclusion. In turn, social exclusion puts marginal workers in a high risk of mental health problems. One of major mental health symptoms has been depression. So far, however, little attention has been paid to the effect of social exclusion of marginal employees on mental health problems including depression. Hence this study examines empirically the effect of social exclusion of casual workers in the construction industry, a protype of marginal employees, on depression. Its results indicate that social exclusion has influence upon depression of marginal workers. This study is the first one to delve into the relationships between temporary employment, social exclusion, and depression of marginal employees. Yet much more empirical researches are needed in order to shed brighter light on these relationships.

• The Journal of the Acoustical Society of Korea
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• v.34 no.1
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• pp.60-65
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• 2015

In this paper, we used the sound of gunshots recorded by multiple microphones to increase the accuracy of the calculation of the distance between sniper and the microphone array. This method is crucial for achieving military objectives. Gunshots are comprised of the explosion of driving gas from the muzzle and the supersonic shock wave from the flying bullet. The original distance calculation method compares the time difference of arrival and angle of incidence to estimate the sniper's location. The disadvantage of this method is that when the angles of incidence coincide the margin of error increases, to solve this problem we suggest a new method using the characteristic changes of the shock wave with the increase of perpendicular distance between the microphone and the trajectory of the bullet. This theory is verified by experiments.