• International Commerce and Information Review
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• v.6 no.2
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• pp.265-285
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• 2004

The objective of this study has two folds. The first is to investigate current global certification system and the second is to suggest some possible solutions for expanding global e-trade networks. Both research and industrial communities recognize the importance of global certification problems in connection with global e-trade payment because global e-trade volume continue to grow. But not many research results have been reported to the communities in identifying some barriers against active global certification systems. This paper intents to suggest some possible solutions for improved global certification system and the results are summarized as follows: First, strict certification structure has to be relaxed by considering diverse mutual certification methods in global e-trade practice. This paper provides some comparative results about mutual certification methods among different nations. Second, numerous business models have to be derived such that they can be applied to other global certification applications than global e-trade. Third, global certified networks have to be expanded beyond mutual certification level. Once the certified structure among different nations have been established then diverse certified authority channels have to be implemented. Finally, since Korea has already established very good public certification infrastructure within the nation this platform has to be positioned in the center of global e-trade networks. This paper has of course to accept a critique such as this study provided limited results to generalized global e-trade certification model, and therefore empirical study for assessing robust model should be pursued in the future.

• Journal of Digital Convergence
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• v.17 no.11
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• pp.523-530
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• 2019

This study examines how global fandom for Korean dramas is formed and maintained by examining the reason and purpose of voluntarily making the subtitles of Korean drama through in-depth email interviews with foreign subtitle producers(fan subber) working on a video site called Viki.com. The research focused on Viki's fan community, which has grown into the most influential Korean Wave platform. Collective intelligence expresses in the fan community produces more than professional results and they are acting as consumers, cultural producers, and second creators of K-content. In order to continue the spread of K-content, it needs to pay more attention to the long-term strategy of global fandom combined with the fan community activities of the new media platform and network effects.

• Journal of Internet of Things and Convergence
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• v.8 no.5
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• pp.27-31
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• 2022

Recently, many global companies are making efforts to realize the sharing economy based on the establishment of a global supply chain and the established global supply chain. There are various methods for realizing the sharing economy, but among them, a lot of effort is being made to promote the sharing economy of companies through the shared logistics system, especially logistics efficiency. In order to realize the corporate sharing economy, companies are required to find ways to apply ICT-based shared logistics systems. Therefore, this study aims to improve the logistics efficiency of logistics companies in order to increase the efficiency of ICT-based sharing economy in logistics companies. To this end, we would like to present the current status and operation of the domestic shared logistics system for the application of the ICT-based shared logistics system, and suggest the operation plan of the shared logistics system through ICT linkage with the domestic shared logistics system. It is judged that various needs required in the global supply chain can be satisfied by presenting an efficiency plan for ICT-based shared logistics.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.61 no.9
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• pp.1374-1379
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• 2012

Urban rail transit tends to global grounding system in order to control ground potential rise and potential differences between electric equipments. In addition, global grounding system can discharge the large capacity surge current to the ground safely. Since some railway electric equipments are installed all section of line, the global grounding system connected with the connecting grounding wire is more effectively. However, if the fault occurred in the connecting grounding wire area, some dangerous voltage is generated. So, the installation of additional grounding rod will be required. In this study, the global grounding system is simulated using CDEGS program to analyze the divergence spacing of additional ground rod depending on dangerous electric potential characteristics. Grounding net of the each station is modelled in depending on the size of the platform, and the spacing of the connecting grounding rod are compared 50m, 100m, 250m and 400m. Simulation results considering of earth resistivity and underground condition of the connecting grounding wire, spacing of the connecting grounding rod is that less than 250m to spacing of the ground rod was appropriately confirmed.

• Journal of Digital Convergence
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• v.18 no.2
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• pp.421-426
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• 2020

The global game market is growing evenly across a variety of platforms, but in the Korean game market is a decline in growth rates on PC and mobile platforms, which account for more than 80% of the total Korean game market, which requires an alternative. In this study, propose a multi-platform launch of IP-based games as a way to increase the growth rate of the Korean game market. It has been analyzed that multi-platform launch methods can be divided into Stand-alone Multi-platform method, Interlocking multi-platform method, and Upgrade-interlinking Multi-platform method, respectively, and the effect of expanding, providing more satisfactory game play environment and preventing them from escaping to competitive games. Given the limited case analysis in this study, further studies are needed to propose more effective multi-platform utilization measures.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.1
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• pp.50-56
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• 2014

Recently Android apps utilizing location based services are widely used. Understanding the operation of the GPS location provider, among various location providers supported in the Android platform, is an essential task for developers using the Android. This paper, based on the analysis of source codes of the GPS subsystem in the Android platform, shows clearly and orderly the operation of the GPS location provider, in key threads' perspectives as well as in a stepwise fashion from the initialization up to the final location report steps.

• Journal of Korea Multimedia Society
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• v.21 no.2
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• pp.261-270
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• 2018

Hearing-impaired people are increasing rapidly due to the global aging trend. Early detection of hearing loss requires an easy-to-use audiometry device for the public. Existing audiometry systems were developed as PC-based, PDA-based, or smartphone apps. These devices were often dependent on specific software platforms and hardware platforms. In this paper, we tried to improve software platform compatibility by using cross platform, and tried to implement IoT-based pure tone audiometry device which does not require sound pressure level correction due to hardware differences. Pure tone audiometry is available in a variety of ways depending on the type of hearing loss and age. Using the IoT-based audiometry device implemented in this paper, it will be possible for an app developer who lacks hardware knowledge to easily develop an app with various scenarios for hearing screening. The results of this study will contribute to overcoming the software and hardware dependency in the development of IoT-based healthcare device.

• Journal of Korea Game Society
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• v.10 no.2
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• pp.81-88
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• 2010

This study will explore the current status and forecast on Chinese game in relation to game platform. Chinese market has recently developed increasing game platform in the Chinese Market. This paper presents an analysis of Korean game industry's competitive strategy in the Chinese market on the basis of SNG. It explores the new platform such as Webgame and SNS service develops implications for Korean game industry. A new strategy responding to Chinese market and needs is more likely to be successful than a global integration strategy.

• Structural Engineering and Mechanics
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• v.61 no.6
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• pp.785-794
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• 2017

This paper is concerned with the comparative numerical and experimental study on the natural behavior and the motion responses of a 1/75 moored scale model of a 2.5 MW spar-type floating offshore wind turbine subject to 1-D regular wave. Heave, pitch and surge motions and the mooring tensions are investigated and compared by numerical and experimental methods. The upper part of wind turbine which is composed of three rotor blades, hub and nacelle is modeled as a lumped mass and three mooring lines are pre-tensioned by means of linear springs. The numerical simulations are carried out by a coupled FEM-cable dynamics code, while the experiments are performed in a wave tank equipped with the specially-designed vision and data acquisition system. Using the both methods, the natural behavior and the motion responses in RAOs are compared and parametrically investigated to the fairlead position, the spring constant and the location of mass center of platform. It is confirmed, from the comparison, that both methods show a good agreement for all the test cases. And, it is observed that the mooring tension is influenced by all three parameters but the platform motion is dominated by the location of mass center. In addition, from the sensitivity analysis of RAOs, the coupling characteristic of platform motions and the sensitivities to the mooring parameters are investigated.

• Ocean Systems Engineering
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• v.8 no.3
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• pp.329-343
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• 2018

The inclination of seabed profile (sloped seabed) is one of the known topographic features which can be observed at different seabed level in the large offshore basin. A mooring system connected between the platform and global seabed is an integral part of the floating structure which tries to keep the floating platform settled in its own position against hostile sea environment. This paper deals with an investigation of the motion responses of an FPSO platform moored on the sloped seabed under the combined action of wave, wind and current loads. A three-dimensional panel discretization method has been used to model the floating body. To introduce the connection of multi-segmented non-linear elastic catenary mooring cables with the sloped seabed, a quasi-static composite catenary model is employed. The model and analysis have been completed by using hydrodynamic diffraction code AQWA. Validation of the numerical model has been successfully carried out with an experimental work published in the latest literature. The analysis procedure in this study has been followed time domain analysis. The study involves an objective oriented investigation on platform motions, in order to identify the effects of the slopped seabed, the action of the wave, wind and current loads and the presence of riser system. In the end, an effective analysis has been performed to identify a stable mooring model in demand of reducing structural responses of the FPSO.