• Journal of Korea Multimedia Society
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• v.18 no.5
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• pp.631-640
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• 2015

Recently CCTV system is installed widely purpose to enhanced physical security, gathering criminal evidence and management of facilities. In spite of supporting strong management function, CCTV system has weak security function. Therefore high security management function is required. Generally it's not easy to control the devices under NAT using a NMS(Network Management System). So we design and implement alive check algorithm of CCTV devices under NAT using DVRNS address resolution and TCP session check. We evaluated and analyzed of developed system on real environment which includes about 100 DVRs under NAT. As a result of test, it showed that device alive check and DVRNS address resolution were well performed without any error.

• Journal of the Korea Safety Management & Science
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• v.3 no.3
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• pp.131-141
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• 2001

Since 1990's, the Information Technology(IT) of combination between PC and Internet has progressed rapidly. As a fast development of Information Communication Technology and spreading of network, the previous economic state, the method of dealing, transaction object and a scope of transaction is changing. Like this, as raising of IT, the existing off-line commercial transaction is moving to electronic commercial one which based on the web. These days, a electronic distribution system of enterprise and the electronic commercial transaction between small company and customer is being operated, but there is no full developed proper system between small retailor and mid distribution center. So on this paper, the system which manage a simple marketing as well as Inventory Management & customer management will be presented.

• The Journal of the Korea Contents Association
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• v.7 no.11
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• pp.59-68
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• 2007

According to the development of service industry recently, the use of call taxi service is increased to use a taxi more comfortably. But related firms hesitate to construct a call center on account of enormous expense of constructing. Hence we developed the system that can minimize expense of constructing a call center which use a cellular phone. The proposed system is different from the existing call system of using a terminal method. we designed by applying UML(Unified Modeling Language) the system that can integrate and manage operations of customer management, driver management, order management and settlement of accounts etc. more efficiently using CTI(Computer Telephony Integration). Then the designed system is constructed by using Visual Basic 6.0. For implementing CTI more effectively, calling number of customer is received in PC using CID that is commercialized and then the customer's information is retrieved in the Database in real-time. The system proposed in this paper is possible to construct at low expense, can improve customer service level through an efficient customer management solution.

• Proceedings of the KIEE Conference
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• 1995.07a
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• pp.198-201
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• 1995

The overall design criteria for the optimal design of a small LEO satellite power system are described in summary. The analysis result of the KITSAT-I whole orbit data suggests the efficient power opertion for KITSAT-I and also gives some crutial information for developing a new satellite power system.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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• 2016.09a
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• pp.111-117
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• 2016

• IEMEK Journal of Embedded Systems and Applications
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• v.11 no.1
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• pp.15-20
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• 2016

Recently, the u-IT applications for plants and livestock become larger and control of livestock farm environment has been used important in the field of industry. We implemented wireless sensor networks and farm environment automatic control system for applying to the breeding barn environment by calculating the THI index. First, we gathered environmental information like livestock object temperature, heart rate and momentum. And we also collected the farm environment data including temperature, humidity and illuminance for calculating the THI index. Then we provide accurate control action roof open and electric fan in of intelligent farm to keep the best state automatically by using collected data. We believed this technology can improve industrial competitiveness through the u-IT based smart integrated management system introduction for industry aversion and dairy industries labor shortages due to hard work and old ageing.

• Journal of the Korean Operations Research and Management Science Society
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• v.21 no.2
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• pp.95-109
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• 1996

In automobile industry, the depot (distribution center) system is utilized to adjust the inventory and to supply the demands to the firm timely. In case of the small lot demands of short delivery cycle and the long distance from the parts manufacturing to the firm, the depot system is very important. In this paper, a model to minimize the sum of costs of holding, inventory and transportation, is proposed to determine the optimal quantities of production and transportation in JTT system. Finally, computational results that verify the effectiveness of the proposed model are demonstrated.

• Proceedings of the Safety Management and Science Conference
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• 2011.04a
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• pp.229-242
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• 2011

The assorting process in distribution center is one of the most difficult and time-consuming process. The improvement of assorting productivity is a core element which decides efficiency of a distribution center. The time to shipping from receiving depends on assorting such as sorting by customer. To enhance efficiency of assorting typically uses the put to light system composed of computer and digital indicator etc. Generally the layout of put to light system has been performed rather than scientific analysis by a common experience. Therefore, this study analyzes the impact of assorting performance by the number of aisle in assorting process of put to light system.

• Management & Information Systems Review
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• v.18
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• pp.21-40
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• 2006

The activation of an Real Estate transaction that be necessary correspond the user need of Internet suitably for be able to become safe and quick transaction of Real Estate transaction. We have been changed into a buyer center in the market of the while of a shalesman center that The taste of an immovable property buyer is various today. The area range of an Real Estate brokerage that take charge of real estate brokerage business have been reduced gradually that take the influence on Implementation of an Real Estate information system. The age of change of the environment which is bring the change of the mode of an real estate transaction that are leading the change of an Real estate circulation market. The paper is design for implementation of real estate transaction system that lead the period of new Internet and the purpose to accomplish the activation of an immovable property information system that offer an real estate service information

• Korean System Dynamics Review
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• v.6 no.2
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• pp.25-35
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• 2005

This paper describes the mechanism for new investment to appear in waves of boom and bust causing alternative periods of over and under supply of electricity in Korean market. A system dynamics model was developed to describe the dynamic behavior of new investment in Korean market. The simulation results show the boom and bust cycle in the new investments. When the market price is high, investors decide to build new power plants. However, it takes some delay time to complete new power plants. When the new power plants are being added into the grid, the supply increases and the wholesale price begins to decrease. This causes the cancellation of new power plant or delay the construction. This mechanism causes the boom and bust cycle in new investment.