• Journal of Information Technology Services
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• v.12 no.1
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• pp.51-67
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• 2013

Mobile Instant Messenser (MIM) Market With the market is enlarging and attracting more and more companies. With the market expanding and number of users increasing, the competition in this area will be fierce. In order to gain competitive advantage, it is important to develop a strategy to maximize user value and to grasp the continuous usage intention of users. However, there are currently not enough researches done in this field. Therefore, this paper to study the effects of network externalities and perceived experiential value on perceived usefulness, user satisfaction, and continuous usage intention. The research results showed that the perceived experiential value and vertical compatibility significantly affected user satisfaction, but the perceived network size did not. The perceived network size and vertical compatibility did not affect the perceived usefulness. Also, the economic value, which is a sub-factor of the perceived experiential value, did not affect the perceived usefulness, but the functional value and hedonic value did significantly. The perceived network size significantly affected continuance usage intention, but the perceived network compatibility did not.

• 한국HCI학회:학술대회논문집
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• 2009.02a
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• pp.1272-1278
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• 2009

Titles of Nintendo DS are frequently use humor to help users fall in short time. Among many humor element, many titles use exaggeration. It is because 'exaggeration' is the best instrument to make users understand humor without complex cognitive process. Therefore, portable game using humor storytelling as a strategy for attracting various people.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.06a
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• pp.19-27
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• 2000

High speed machining (HSM), specifically end milling and ball end cutting, is attracting interest in the die/mold or aerospace industries for the machining of complex 3D surfaces. HSM of difficult-to-cut materials such as die/mold steels, titanium alloys or nickel based superalloys generates the concentrated thermal/frictional damage at the cutting edge of the tool and rapidly decreases the tool life. Following a brief introduction on HSM and reated aerospace or die/mold work, the paper reviews published data on the effect of cutter/workpiece orientation and cutting environments on tool performance. First, experimental work is detailed on the effect of cutter orientation on tool life, cutting forces, chip formation, specific force and workpiece surface roughness. Cutting was performed using 8 mm diameter PVD coated solid carbide cutters with the workpiece mounted at an angle of 45 degree from the cutter axis. A horizontal downwards cutting orientation proveded the best tool life with cut lengths ∼50% longer than for all other directions (horizontal upwards, vertical downwards, vertical upwards). Second, the cutting environments were investigated for dry, flood coolant, and compressed chilly air coolant cutting. The experiments were performed for various hardened materials and various coated tools. The results show that the cutting environment using compressed cilly air coolant provided better tool life than the flood coolant or the dry.

• The KIPS Transactions:PartC
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• v.13C no.5 s.108
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• pp.595-600
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• 2006

Nowadays, low-cost radio frequency identification (RFID) technique, is recognizable without the physical contact between the reader and the tag, has been attracting more and more interests from both industry and academic institutes. however, it causes the serious privacy infringement such as excessive information exposure and user's location information tracking due to the wireless characteristics. The security problem of read only tag can be only solved by physical method. In this paper, we propose a low-cost authentication protocol which can be adopted for read-only RFID tag using XOR and Partial ID. The proposed protocol is secure against reply attacking, eavesdropping and spoofing attacking so that avoiding the location privacy exposure

• Journal of the Korea Fashion and Costume Design Association
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• v.8 no.2
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• pp.171-182
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• 2006

The purpose of this study was to business cases of setting up a shopping mall for Hanbok and other successful marketing cases were investigated to seek easy ways of establishing a internet shopping mall and to provide information on the structure of e-market and online shopping malls. In our country, online market has overtaken offline one, and the former has made sustained progress. Many domestic Hanbok manufacturers set up their homepages as part of efforts for online marketing or P.R. However, online shopping malls are run just by a small number of companies, and traditional Hanbok manufacturers are in worst situations. To be steadily competitive enough to keep on attracting customers, they should try to make their way through e-market from diverse angels. The purpose of this study was to delve into the establishment of an online shopping mall for Hanbok products and relevant marketing in an attempt to lay the groundwork for solidifying the position of Hanbok products in apparel e-market.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.67 no.7
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• pp.892-897
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• 2018

Due to population aging, an increase in the number of patients with chronic illnesses, and an increase in the number of single-person households, monitoring of health status in everyday life without the need for a hospital has become very important. For this reason, researches on various health care devices have been attempted, among which wearable devices are attracting much attention. In this paper, we propose a new ring-type wearable device for next generation healthcare. On the inner side of the ring, a metal electrodes for GSR measurement and an optical sensor for measurement of pulse wave signals of two wavelengths of red and near-infrared light were mounted. In addition, it was equipped with an acceleration sensor, and information about the degree of motion could be obtained. In this paper, it is shown that a health monitoring device can be implemented in the form of a ring, and the measured signals can be used to calculate heart rate, oxygen saturation, sleep time and sleep efficiency. Through the advanced algorithm, it is expected that we can extract various health information, especially sleep related health information by using the ring device, and it is also expected that it can contribute to the implementation of wearable healthcare effectively.

• Journal of Korea Multimedia Society
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• v.17 no.2
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• pp.257-265
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• 2014

3 dimensional stereoscopic is attracting new attention as it simulates human eye and related hardware advances. However, 3 dimensional stereoscopic requires more time and effort than 2D movie because it uses 2 cameras or 2 lenses. This study analyzed the merits and demerits of the system producing rider movie using 3 dimensional stereoscopic shooting techniques and searched a way to produce better 3 dimensional stereoscopic rider movie which meets the producing intention by applying elements required to create effective 3 dimensional stereoscopic effect. According to the study result, a light-weight integrated system was effective to create 3 dimensional stereoscopic rider movie because of its genre characteristic. In the post-production of the work, location shooting considered of time re-mapping, color correction and graphic element addition was required.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 2009.10a
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• pp.411-414
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• 2009

Photo-capacitor electrodes are attracting great attention because of their high capacitance and potential applications in electronic devices. Carbon capacitor, active carbon capacitor and its combination will be fabricated using simple sandwich capacitor electrode method as carbonaceous material on each type of capacitor electrodes with 20 ${\times}$ 15 mm cell size. Carbon/active carbon cell was fabricated using sol-gel process with 120oC dry temperature in l hour and using sintering process with 500oC in 2 hour. The effect of sintering temperature on carbon properties was also investigated with X-ray diffraction technique to get the best sintering temperature. The detail of fabrication process will be explained. Elemental composition in electrode material can be measured using quantitative spectroscopic as and a cyclic voltammetric technique was used to study the combined effects of electrode material and effect of annealing temperature and also time on the capacitance of thermally treated in capacitor electrode. In this work, characterization impedance technique is used to measurement of capacitance and giving complementary results. Active carbon as carbonaceous material has a better capacitance in charge/discharge process with mean thickness $32{\mu}m$ and with particle size $1{\mu}m$ to $4.5{\mu}m$ in 20 ${\times}$ 15 mm sample size of capacitor electrode.

• Journal of the Korean Institute of Rural Architecture
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• v.11 no.1
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• pp.67-74
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• 2009

A new possibility for helping regional residents to establish the identity based on the history, culture and environment of the region and harmonizing art and culture in daily life can be seen from eco-museum. Unique cultural inheritances for each region exist not only in our nation but everywhere around the world, and Cheonan region is continuously attracting tourists from other regions as a home of the Independence Hall, Yu Gwan Sun Memorial, and live branches of independent activists with important inheritances such as tourist attractions and national treasures. However, despite unique environment of the region and inheritances with high academic values, lack of basic guides and explanations place the region in an environment that is difficult to approach. The purpose of this study is to systematically investigate regional inheritances based on the concept of eco-museum as an alternative for such problem recognition and to examine problems of inheritances scarred around Cheonan region based on their current status. The author of this study aims to analyze the investigated regional inheritances, rearrange their values and suggest possibilities for continued preservation and utilization.

• Journal of the Korean Institute of Landscape Architecture
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• v.34 no.2 s.115
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• pp.72-79
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• 2006

Integrated CI (country identity, community identity) planning is necessary for establishing identity and a distinct image as well as for managing green tourism villages. In addition, CI planning will be helpful for improving and advertising a village's image, capitalizing on its specialties and attracting many visitors to the village. Therefore, this study mainly intended to plan and design integrated CI for a green tourism village. For this purpose, this study selected Hari village in Hongsung-Kun, Chungnam province, which the Ministry of Agriculture and Forestry designated as a green tourism village in 2003. Twenty CI alternatives were developed, and a vote was conducted with 143 visitors and rural residents attending a village festival in 2004. This study resulted in a new brand-name, 'Hanuri,' and developed symbols, logotypes, distinctive colors, signature system as a basic system and name cards, packaging materials, and signs for use. Above all, this study led the residents to pursue a village identity, village image and community spirit, which can be an effective management strategy to create a distinct image in a green tourism village.