• Journal of the Korean Dietetic Association
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• v.12 no.2
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• pp.127-145
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• 2006

The purpose of this study is to develop an educational program for Korean traditional food culture, which is consisted of diverse activity factors and educational contents of the elementary students, and to transfer Korean traditional food culture to the next generation effectively. We have developed the program on the basis of FIB(Fun Integrated Behavior) approach derived from the activity-based education theory. This program is consisted of 32 subjects related with Korean traditional food culture, which is planned to perform in special activity classes for 2 semesters. An instruction guidebook for teachers and a workbook for students have been also developed. The traditional food culture educational program which is developed in this study could be used as a practical educational tool in 'dietary life and culture class' or 'special activity class' which is recently being introduced as the nutrition education curriculum in the elementary school. Furthermore, we expect this program to be able to contribute to transferring Korean traditional food culture to the next generation and reinforcing the elementary schoolers' diet behavior through inspiring them with a realization of the superiority of Korean traditional food culture.

• Journal of Digital Convergence
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• v.14 no.1
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• pp.387-398
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• 2016

The market size of online games has been rapidly growing as well as the behaviors of online gaming users have been changed. Online games are different from the traditional video games, because they permit players to interact each other during playing games. Today online gaming is a part of everyday life and social interaction has an impact on online gaming behaviors. Social interaction does not only have a positive impact on online game behaviors, but it also has a negative impact on them such as excessive online game usage. Previous research has a limitation to consider social interaction as a comprehensive concept. In order to fill the gap, we explore the factors of social interaction influencing on excessive online game usage. After reviewing previous literature, this study chooses three factors of social interaction such as escaping loneliness, expanding online social bridging capital, and reinforcing offline social bonding capital. The findings show that all of three factors of social interaction positively affect the excessive online game usage.

• Journal of Digital Convergence
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• v.14 no.1
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• pp.427-436
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• 2016

Is university restructuring for 'reinforcing university education quality and competitiveness of higher education'? The fundamental problems of the on going university restructuring becomes crisis of university and moreover, Sports Related Departments faces huge crisis. This research analyzes university crisis and progress of Sports Related Departments. After conducting discussion about a directivity of Physical Education in university with a focus on role and direction of 'Physical Education' which is for realization of 'University''s ideal, Sports Related Departments proposed four practical tasks, which is for preventive improvement, not for prescriptive improvement. First, Effort to establish academical identity. Second, characterization strategy for each different region and university. Third, Reforming of Sports Related Departments related with prospect of the labour market. Last, Drawing up a plan for establishing Sports Related Departments' united system.

• Proceedings of the KSR Conference
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• 2009.05a
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• pp.879-891
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• 2009

Impedance of rails is increased by the magnetic coupling between rails and reinforcing bars in the concrete slab track. Currently, the current of track circuit has been compensated by installing the compensation capacitors on track circuit because of increasing the impedance of rails. In case of a rapid transit railway, the compensation capacitors are installed every 20[m] to compensate the current of track circuit in the concrete slab track. Because the interval of one block for a rapid transit railway is as long as 1500[m], the compensation capacitors are installed about the number of 70$\sim$75 on track circuit. However, in case the compensation capacitors are broken over the number of three, it is a problem that the amplitude of current is under standard amplitude of current which is 0.8[A]. In this paper, it was suggested installing a compensation capacitor by using resonance phenomenon on the concrete slab track. We represent the electrical model of track circuit and the four terminal network, calculate the parameters demanded for the electrical model in the concrete slab track. Also, we computed the position and capacitance of the compensation capacitor about 2040[Hz], 2400[Hz], 2760[Hz], 3120[Hz] which currently is the track circuit frequency in the Gyeongbu rapid transit railway and demonstrated the validity of it, using the Matlab and PSpice program.

• Restorative Dentistry and Endodontics
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• v.40 no.4
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• pp.262-269
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• 2015

Objectives: The aim of this study was to evaluate the mechanical and physical properties of a newly developed fiber reinforced dental composite. Materials and Methods: Fiber reinforced composite EverX Posterior (EXP, GC EUROPE), and other commercially available bulk fill composites, including Filtek Bulk Fill (FB, 3M ESPE), SonicFill (SF, Kerr Corp.), SureFil (SDR, Dentsply), Venus Bulk Fill (VB, HerausKultzer), Tetric evoceram bulk fill (TECB, Ivoclar Vivadent), and Xtra Base (XB, Voco) were characterized. Composite samples light-cured with a LED device were evaluated in terms of flexural strength, flexural modulus (ISO 4049, n = 6), fracture toughness (n = 6), and Vickers hardness (0, 2, and 4 mm in depth at 24 hr, n = 5). The EXP samples and the fracture surface were observed under a scanning electron microscopy. Data were statistically analyzed using one-way ANOVA and unpaired t-test. Results: EXP, FB, and VB had significantly higher fracture toughness value compared to all the other bulk composite types. SF, EXP, and XB were not statistically different, and had significantly higher flexural strength values compared to other tested composite materials. EXP had the highest flexural modulus, VB had the lowest values. Vickers hardness values revealed SF, EXP, TECB, and XB were not statistically different, and had significantly higher values compared to other tested composite materials. SEM observations show well dispersed fibers working as a reinforcing phase. Conclusions: The addition of fibers to methacrylate-based matrix results in composites with either comparable or superior mechanical properties compared to the other bulk fill materials tested.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.17 no.2
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• pp.131-140
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• 2004

It really needs fuzzy decision making of integrity assessment considering about both durability and load carrying capacity for maintenance and administration, such as repairing and reinforcing. This thesis shows efficient models about reinforced concrete structure using CART-ANFIS. It compares and analyzes decision trees parts of expert system, using the theory of fuzzy, and applying damage & diagnosis at reinforced concrete structure and decision trees of integrity assessment using established artificial neural. Decided the theory of reinforcement design for recovery of durability at damaged concrete ＆ the theory of reinforcement design for increasing load carrying capacity keep stability of damage and detection. It is more efficient maintenance and administration at reinforced concrete for using integrity assessment model of this study and can carry out predicting cost of life cycle.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.13 no.4
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• pp.417-425
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• 2000

This paper describes the application of discretized continuum-type optimality criteria(DCOC) and the development of optimum design program for the reinforced concrete continuous beams with rectangular cross-section. The cost of construction as objective function which includes the costs of concrete, reinforcing steel and formwork is minimized. The design constraints include limits on the maximum deflection, flexural and shear strengths, in addition to ductility requirements, and upper and lower bounds on design variables as stipulated by the design Code. Based on Kuhn-Tucker necessary conditions, the optimality criteria are explicitly derived in terms of the design variables-effective depth, and steel ratio. The self-weight of the beam is included in the equilibrium equation of the real system. An iterative procedure and computer program for updating the design variables are developed. Two numerical examples of reinforced concrete continuous beams are presented to show the applicability and efficiency of the DCOC-based technique.

• Journal of Digital Convergence
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• v.10 no.11
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• pp.1-10
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• 2012

Korean government is providing a Internet-based government services to people. One of the main concerns of the government for implementing e-government services is to increase the sustainable use of the people. Therefore, management and development of e-government Web site is an important issue. In particular, it is an important to the government policy for reinforcing satisfaction and trust of the usage of e-government services. Thus, the Web site design is an important issue to consider for increasing usage of e-government services. Therefore, studies of e-government Web site design suggested an important implication to spread for continual usage of e-government services. In this study, we investigated relationships among the design factors of e-government Web site, trust, and satisfaction. The results of this study will provide useful suggestions for developing design strategies for continual adoption of e-government services.

• Journal of Korea Society of Digital Industry and Information Management
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• v.5 no.4
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• pp.231-247
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• 2009

With the growth of e-commerce banks make the best use of internet banking which can provide all sorts of financial services in cyber space and satisfy customers beyond traditional banking services which are cash reserve and loan based on retail. For survival of internet banking high quality of service should be provided to customers. For this, the attributes of service quality in internet banking should be identified first. The studies on scale of service quality in internet banking have been divided into two ways. While traditional way has focused on SERVQUAL, several researchers have developed scale of e-service quality. However, the dimension of e-service quality is applied from the traditional dimension of service quality. In this paper five dimensions of tangibles, reliability, responsiveness, assurance, and empathy based on SERVQUAL are used as scale of service quality in internet banking through reviewing previous studies. In addition, because service value is correlated to service quality, the dimensions of service quality can affect e-service value. The positive relationship among e-service value, customer satisfaction, and customer loyalty in online or offline service has been identified by previous studies. The purpose of this study is to identify the relationship among service quality, e-service value, customer satisfaction, and customer loyalty in internet banking. SPSS 12.0 is used to test validity and reliability of questionnaire items and correlation of variables and AMOS 4.0 is used to test the hypotheses. The results of this study show that the responsiveness, assurance, and empathy factors of service quality have a positive effect on service value and that the tangible and assurance factors have a positive effect on customer satisfaction. It also shows that e-service value affects positively customer satisfaction and loyalty. Customer satisfaction affects positively customer loyalty. Therefore, to enhance customer satisfaction and loyalty, service quality and value of internet banking should be improved through reinforcing customers' trust in internet service quality.

• Elastomers and Composites
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• v.45 no.2
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• pp.80-86
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• 2010

Carbon nanotubes (CNTs) exhibit excellent mechanical, electrical, and magnetic properties as well as nanometer scale diameter and high aspect ratio, which make them an ideal reinforcing agent for high strength polymer composites. The functionalized CNTs are believed to be very promising in the fields such as preparation of functional and composite materials. CNT-Polymer composites are expected to have good processability characteristics of the polymer and excellent functional properties of the CNTs. However, since CNTs usually form stabilized bundles due to Van der Waals interactions, are extremely difficult to disperse and align in a polymer matrix. The biggest issues in the preparation of CNT-reinforced composites reside in efficient dispersion of CNTs into a polymer matrix, and the alignment and control of the CNTs in the matrix. There are several methods for the dispersion of nanotubes in the polymer matrix such as solution mixing, bulk mixing, melt mixing, in-situ polymerization and chemical functionalization of the carbon nanotubes, etc. These methods and preparation of high performance CNT-polymer composites are described in this review.