• Journal of Digital Convergence
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• v.10 no.10
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• pp.237-245
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• 2012

This study deals with the influencing factors for satisfaction and the emotional value perception of mobile voucher service user. Thus researcher examined a structural equation modeling methodology of the paths within word of mouth, satisfaction, and other exogenous variables (economic/rational value, trust, joyfulness, innovativeness). As a result of this study, First, it was confirmed that the emotional value, and innovativeness affected user's trust for coupon service and joyfulness for using mobile voucher. Second, it was confirmed that trust and joyfulness affected user's satisfaction and word of mouth activities. Therefore, in cases of utilizing the emotional appeal of mobile voucher as part of a marketing tool, corporate can maximize efficiency by using their mobile voucher service & event from the point of view of customer's satisfaction & voluntary word of mouth. Researcher's consideration is that this paper's theoretical and practical contribution point is the propose of the one of the post adoption model with the quantitative study of the mobile voucher service user's emotional perception in the initial development stages of high-tech industry.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.73-79
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• 2018

In this study, we analyze the case of Moon Jae-In's government based on the specific public enterprises. The public companies that were the subject of the study were evaluated as having done a good job of open innovation through open innovation evaluation. In this study, we analyzed the success factors of open innovation through collaborative in - depth interviews with public corporations, public agencies and local farmers. First, it was important to share goals to form a consensus to seek cooperation among the cooperative actors. It is very important to recognize that each other has a mutually beneficial relationship and move toward a common goal. In addition, it was found that the incentive system for continuously participating in collaborations or innovations is very important. Therefore, in order to encourage collaboration, it is necessary for public institutions to establish an incentive system such as personnel compensation or economic compensation.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.47 no.6
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• pp.22-34
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• 2010

Existing image scalers generally adopt simple interpolation methods such as bilinear method to take cost-benefit, or highly complex architectures to achieve high quality resulting images. However, demands for a low power, low cost, and high performance image scaler become more important because of emerging high quality mobile contents. In this paper we propose the novel low power hardware architecture for a high quality raster scan image scaler. The proposed scaler architecture enhances the existing cubic interpolation look-up table architecture by reducing and optimizing memory access and hardware components. The input data buffer of existing image scaler is replaced with line memories to reduce the number of memory access that is critical to power consumption. The cubic interpolation formula used in existing look-up table architecture is also rearranged to reduce the number of the multipliers and look-up table size. Finally we analyze the optimized parameter sets of look-up table, which is a trade-off between quality of result image and hardware size.

• Korean Journal of Childcare and Education
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• v.11 no.1
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• pp.435-459
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• 2015

It is generally agreed that the 21st century is the era of postmodernism. Postmodernism emerged with opposition and resistance to modernism which pursued values like the absoluteness of truth and knowledge, the Enlightenment, rationalism, objectivism and consequentialism among others. Now postmodernism is currently given a great deal of attention as it is considered a new ideology that can help explain many of the different and continuous changes which are occurring in a variety of fields including politics, economy, society and culture, not to mention education. In this sense, this study's purpose is to examine postmodern aspects found specifically in the field of early childhood education. As a result, this study found that those aspects could be briefly described by four main phrases, or 'early childhood education whose contexts are based on relativity', 'early childhood education operating under the system of rhizome' 'early education in which inter-directionality is pursued' and 'early education in which process-orientation is being intensified'. In the chapter of conclusion, finally, this study discusses how those aspects are correlated with one another and what implications they may have for the field of early childhood education.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.27 no.4
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• pp.753-761
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• 2017

Recently, malicious code infiltration and leakage of confidential documents using external USB medium are frequently occurring in each field. We investigate the media to investigate incidents using external USB media, but there are many difficulties in that they can be lost or damaged. Ultimately, in order to investigate cases of external USB media, it is necessary to conduct a direct analysis of the external USB media as well as the system to which the media is connected. This paper describes an analysis of the artifacts of Windows systems to which external USB media is connected, and how to check the job history on the media. Therefore, it is expected that the system can be used to analyze the job history of the USB medium even if the external USB medium is not secured.

• Journal of the Korea Convergence Society
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• v.8 no.12
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• pp.15-22
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• 2017

This paper analyzes vulnerability of each service protocol used in ICT convergence industry, smart factory, smart grid, smart home, smart traffic, smart health care, and suggests technologies that can overcome security vulnerabilities. In addition, we design a service-oriented protocol security framework that allows us to quickly and easily develop security functions in an open environment by defining a security element common to protocols and designing a security module for each protocol layer including the corresponding elements. Service protocol independent security module and specialized security module, it will be possible to develop flexible and fast security system in ICT convergence industry where various protocols are used. The overall security level of the ICT service network can be improved by installing the necessary security modules in the operating system, and the productivity can be improved in the industrial security field by reusing each security module.

• Polymer(Korea)
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• v.27 no.4
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• pp.377-384
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• 2003

High impact polystyrene/organically modified layered silicate (HIPS/OLS) nanocomposites by in situ polymerization were synthesized to investigate the effect of clay on the particle size and properties of rubber. In the OLS, the montmorillonite having benzyl group showed best dispersion in polystyrene phase. With the addition of clay, the intercalated peak from XRB was confirmed, but the peak gradually shifted to lower angle as rubber concentration increased. Thus, it is speculated that the organoclay disperses better in rubber phase than in polystyrene phase. The average rubber particle size increased and the particle size distribution widened as the amount of clay increased, which may be caused by the increase of the viscosity ratio of rubber to polystyrene phases and the unstable dispersion. The materials having clay showed improved thermal properties from thermogravimetric analysis. Rheological properties such as complex viscosity and storage modulus increased as the amount of clay increased.

• Journal of Broadcast Engineering
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• v.9 no.3
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• pp.257-273
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• 2004

In stereoscopic or multi-view three dimensional display systems, the synthesis of intermediate sequences is inevitably needed to assure look-around capability and continuous motion parallax so that it could enhance comfortable 3D perception. The quadtree-based disparity estimation is one of the most remarkable methods for synthesis of Intermediate sequences due to the simplicity of its algorithm and hardware implementation. In this paper, we propose two ideas in order to reduce the annoying flicker at the object boundaries of synthesized intermediate sequences by quadtree-based disparity estimation. First, new split-scheme provides more consistent auadtree-splitting during the disparity estimation. Secondly, adaptive temporal smoothing using correlation between present frame and previous one relieves error of disparity estimation. Two proposed Ideas are tested by using several stereoscopic sequences, and the annoying flickering is remarkably reduced by them.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.26 no.2
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• pp.218-225
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• 2015

Inverse synthetic aperture radar(ISAR) is coherent imaging system formed by conducting signal processing of received data which consists of radar cross section(RCS) reflected from maneuvering target. A novel algorithm is proposed to compensate inter-pulse motion(IPM) for the purpose of forming an well-focused ISAR image through signals generated by stepped chirp waveform( SCW). The velocity and acceleration of the target related to IPM are estimated based on particle swarm optimization (PSO) which has been widely used in optimization technique. Furthermore, a modified PSO which enables us to improve the performance of PSO is used to compensate IPM in a very short-time. Simulation results using point scatterer model of a Boeing-737 aircraft validate the performance of the proposed algorithm.

• KSBB Journal
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• v.14 no.2
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• pp.174-180
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• 1999

An actinomycetes strain No.4 which produce the cholesterol oxidase(EC 1.1.3.6), was isolated from soil and identified as Streptomyces sp. based on taxonomic studies. The conditions of cholesterol oxidase production and enzymatic properties were investigated. The optimum composition of medium for production of the enzyme was 1% soluble starch, 2% corn steep liquor, 0.1% $KH_2PO_4$, 0.1% $NaNO_3$ and 0.05% $MgSO_4$ (pH 7.0). The optimum pH and temperature of the cholesterol oxidase were pH 6.0~7.5 and $37^{\circ}C$, respectively. The enzyme was stable in the range of pH 6.0~9.0. The isoelectric point determined by multichambered electrofocusing unit was in the range of pH 6.0~6.5.