• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.312-325
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• 2020

The heat perm is the preferred hair technique to get positive affects such as increase of work efficiency and sale in hair industry. The subjects of this study is 262 hair shop workers and it was investigated heat perm device using reason, using satisfaction and repurchase. As a result, the perm accounted for 32.1 and the use of digital perm devices was more than that of setting perm devices. The reasons for the use were that the longer the setting device was engaged, the flexible it was the hair wave. The higher the rank, the better the hair wave retention and the long hair treatment, and it also helped sales. (p<0.05) Digital perm device can be hair-wavy in the desired style while in use, and the longer the working period, the more advantageous. The repurchase intention was that the longer the period of service and the higher the rank, the more advantageous it was. (p<0.05) The reasons for the usage of setting perm and digital perm were correlated with the satisfaction of use and the repurchase intention. The reasons for the use were helpful for sales and elastic hair wave and long hair waving was possible, which affected the repurchase. In conclusion, heat perm had been found not only helped sales, made a good hair wave, and the long hair waving, but also to be preferred to the long working period of the hair shop and the rank above the designer.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06b
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• pp.321-326
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• 2007

최근 휴대전화 디지털 카메라, 랜 스위치, 디지털 셋톱박스, 휴대용 MP3 플레이어, 노트북용 PC 카드, 내장 기기의 펌웨어 등 플래시 메모리의 활용이 증가하고 있다. 하지만 기존 저장 장치와 달리 플래시 메모리는 특정 블록에 쓰기 연산을 하기 전에 해당 블록은 미리 소거(erase-before-write)되어 있어야 하는 제약이 있으며, 각 블록은 소거될 수 있는 횟수가 제한적이다. 이런 단점들은 플래시 메모리가 대용량화됨에 따라 중요한 문제로 대두되고 있다. 이런 각 블록에 대한 소거 횟수의 제한을 해결하기 위하여 소거 횟수 평준화 기법(wear-leveling) 기법이 필수적이다. 본 논문에서는 블록의 소거 횟수의 한계를 극복하기 위한 새로운 소거 횟수 평준화 기법으로 전체 블록에 대한 소거 횟수 레벨을 두어 소거 횟수 평준화를 이루는 KM-평준화(KM-leveling)를 제안한다. KM-평준화는 소거 횟수 평준화를 위한 전체 블록의 계산 비용을 최소화하고 블록에 대한 소거 레벨을 두어 적은 공간을 사용하는 효율적인 기법이다. 본 논문은 M값 범위 이내에 각 블록의 소거 횟수들이 존재하도록 보장하는 KM-평준화를 제안한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.1
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• pp.185-191
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• 2015

This paper suggest the safety class communication board in order to design the safety network of the nuclear safety class controller. The reactor protection system use the digitized networks because from analog system to digital system. The communication board shall be provided to pass the required performance and test of the safety class in the digital network used in the nuclear safety class. Communication protocol is composed of physical layer(PHY), data link layer(MAC: Medium Access Control), the application layer in the OSI 7 layer only. The data link layer data package for the cyber security has changed. CRC32 were used for data quality and the using one way communication, not requests and not responses for receiving data, does not affect the nuclear safety system. It has been designed in accordance with requirements, design, verification and procedure for the approving the nuclear safety class. For hardware verification such as electromagnetic test, aging test, inspection, burn-in test, seismic test and environmental test in was performed. FPGA firmware to verify compliance with the life-cycle of IEEE 1074 was performed by the component testing and integration testing.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.811-814
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• 2015

There are many modern societies use the digital products in everyday life in the Middle, convenience, give him plenty of Bluetooth is one of the users. Bluetooth (IEEE 802.15.1) means equipment in the close range between the low-power wireless communication standard for the connection to use the technology. Currently, Bluetooth earphone, Bluetooth speaker, wearable mounted devices also used a lot because it takes people to exploit the benefits had been lifted and thereby increases your damage. So, reducing the damage the user's further research about the security technique that can stop completely. I am sure that many Bluetooth hacking techniques, a Bluetooth device firmware vulnerability within the stored data to allow the approach to attacking the BlueTooth Snarfing and want to analyze.