• Proceedings of the Korean Radioactive Waste Society Conference
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• 2017.10a
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• pp.95-96
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• 2017

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.6-8
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• 2002

In this paper present Autonomous Adaptive Digital Over Current Relay which acts autonomous setting using voltage and current measured by relay in the change of power systems. Automation of relay setting is required for distribution automation although manual relay setting is used at present. This paper presents Autonomous Relay Setting which knows change of the power system and acquires setting element using the Recursive Least Squares. Relay setting is very difficult work. But proposed relay is expected to decrease burden of relay setting using acquired information of power system change and autonomous setting. Also fast protective ability is expected according to change of power system.

• The Journal of Society for e-Business Studies
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• v.4 no.3
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• pp.213-234
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• 1999

Currently, various international standard organizations, academic institutes, and private organizations are making efforts to improve and expand the traditional EDI. The next generation EDI has potential to impact on the existing and planned EDI systems. Major objective of this study is to systematically analyze and compare various next generation EDI technologies. In order to accomplish the research objective, this paper presented the following three issues. First, overall development trend and types of the next generation EDI were analyzed. Secondly, basic concepts of a few important next generation EDI technologies were presented. Lastly, models to be used to analyze the various next generation EDI technologies were proposed and results of the analyses peformed based on the proposed models were presented.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2004.05a
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• pp.335-338
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• 2004

In this paper, we present a perspective of the next generation mobile communication services and its characteristics. As a preliminary research work on the next generation mobile communications and services, we exploit the next generation mobile services [1]. We define the next generation mobile services as strata of services consisting of three different service levels, the service areas, the service functionalities, and the service technologies. We derive these service levels by means of the scenario based analysis. Finally, we propose a conceptual network architecture that can support the next generation mobile services by placing network functions and service elements within the network.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.614-615
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• 2008

This paper describes the status of advanced technologies and technical analysis for development of Korean next generation maglev. The propulsion systems of worldwide maglev and research status of Korean maglev have been represented.

• Journal of Electrochemical Science and Technology
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• v.13 no.3
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• pp.323-338
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• 2022

Heat generation and temperature of a battery is usually presented by an equation of current. This means that we need to adopt time domain calculation to obtain thermal characteristics of the battery. To avoid the complicated calculations using time domain, 'state of charge (SOC)' can be used as an independent variable. A SOC based calculation method is elucidated through the comparison between the calculated results and experimental results together. Experiments are carried for rapid resistive discharge of a large-capacitive lithium secondary battery to evaluate variations of cell potential, current and temperature. Calculations are performed based on open-circuit cell potential (SOC,T), internal resistance (SOC,T) and entropy (SOC) with specific heat capacity.

• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.117-120
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• 2007

This article describes a definition of next generation access network, and introduces the researches about a candidate optical links for the next generation access network, and a trend of standardization of Next Generation Access (NGA). Expansion in reaches of access network enables to the evolutions to the metro-access union system. Also, this paper reviews the access network in Korea, and suggests the requirements for the system in NGA.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.218-218
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• 2006

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2006.07a
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• pp.726-726
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• 2006

• Journal of Information Technology Services
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• v.9 no.4
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• pp.243-259
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• 2010

It is expected that the next generation mobile communication system will be a service-driven developed system capable to realize the human-centric mobile convergence services. and it is different from the technology-driven development approach of the second and the third generation mobile communication systems. As a preliminary research work on such service-driven system development approach for the next generation mobile communication system. we developed the scenario based service analysis process (2SAP) framework to derive core service technologies and functionalities. In this paper. we propose the next generation mobile convergence service business model creation methodology based on research results of the 2SAP framework. To achieve this goal, we first establish a service model contains several components such as infrastructures. operations. and provision of services that are indispensible for providing next generation mobile services. Then, the next generation mobile services and its corresponding business models can be created by adding service and value flows to the developed service model after defining necessary components of business model including actors, their relationships, and roles.