• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.4962-4967
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• 2010

Security of the electronic commercial transaction especially through the information communication network is gaining its significance due to rapid development of information and communication related fields. For that, some kind of cryptographic algorithm is already in use for the smart card. However, the growing needs of handling multimedia and real time communication bring the smart card into more stringent use of its resources. Therefore, we proposed a key scheduler block of the smart card to facilitate multimedia communication and real time communication.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.4685-4690
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• 2010

New E-EGR valve design to suppress a carbon deposit causing a trouble in the valve by improving gas flow velocity is proposed. With CFD simulations of various shapes of valve disk and rod, the velocities and quantities of flowing fluid are observed. The proposed unique design of having round grooves on the disk head shows the improved performance of flow velocity about 10 % without sacrificing the flow quantity.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5177-5183
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• 2010

The effects of the ovalization of the tangential pipes to the elbows are analyzed. The geometric nonlinear behaviors of the elbows are shown with the element capable of ovalization. The relationships between the length of the tangential pipes in the models and the bend angles of the elbows are analyzed to supplement the ASME code. And the proper length of the tangential pipes for the elbow models are suggested.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.12
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• pp.5029-5035
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• 2010

This paper proposes a scheme to maximize traffic capacity for supporting mobile multimedia services. For a handoff session, we suggest a novel resource reservation scheme to adjust the number of reserved resources in macrocell, depending on the number of saturated microcells. The proposed schemes are able to accommodate much more mobile sessions in the microcell and significantly reduce the blocking probability in the macrocell at the expense of the small increment of a forced termination in the microcell. Therefore, our system is more flexible to the increase of traffic in macrocell.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2294-2297
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• 2011

The research which sees currently inspects the damage of the street lamp circuit which is used selectively the diode for developed. Street lamp diagnosis is developed will grasp the lighting presence of LED indication systems and will be able to inspect selectively. The case where the street lamp will not light, will be able to indicate with the relationship of LED putting out lights where the breakdown should have occurred in which part. Circuit produced PCB borads and the system will be able to confirm the breakdown point location of street lamp individual grade developed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2317-2321
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• 2011

This paper is proposed new data crytoblock algorithm based on the private key cryptoalgorithim with existed other cryptography algorithims. Therefore new crytoblock design and simulation using the common Synopsys and ALTERA Max+ PlusII Ver.10.1. As a simulation result, new data crytoblock have gate counting 640Mbps at the 40M hz. We thought that proposed new data crytoblock adapt real time information security.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2445-2450
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• 2011

Design of reformate fractionation process using a fully thermally coupled distillation is conducted with commercial design software Aspen HYSYS. Detailed procedure of the design is explained, and the performance of the process is compared with that of a conventional system. The design outcome indicates that the procedure is simple and efficient. The performance of the new process indicates that an energy saving of 12.2% is obtained compared with the conventional process while total number of trays maintains at the same.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2346-2352
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• 2011

E-mail systems using the intranet is widely exposed to internal threats should an administrator or a third party decides to misuse the information. To solve this problem, we propose a safe intranet email encryption protocol using the symmetrical-key password algorithm. Since the proposed protocol encrypts the data using a pre-agreed session keys between the users, the data will be safe from malignant access attempts provided that the session key is not exposed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.5
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• pp.2025-2030
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• 2011

Recently, several vehicle manufacturers have used the aluminum side door impact beam in order to reduce the vehicle weight and costs. But, the aluminum impact beam may cause the reduction of the side door strength and the side impact capability. Therefore, this paper optimized the section dimension and section shape of the side door impact beam to satisfy the legislation of the side door strength and maintain the side impact capability as well as steel impact beam

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.9
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• pp.3446-3450
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• 2010

This study aims to make class lighting that gives classroom to stability and activity. For the purpose, we develop a emotional lighting LED using LED source which is a environment-friendly and the lighting fo the next generation. We composed emotional lighting LED as controller for color conversion, power supply for supplying LED lamp a stable power, PCB board for LED lamp and lamp and case. We developed designed emotional lighting LED and proved that the system works and one can get intended color.