• The Journal of the Korea Contents Association
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• v.17 no.5
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• pp.243-251
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• 2017

This study aimed to demonstrate 'moderated mediation' effect of self-control on the relationship of neuroticism-smart phone addiction-school adaptation. For this purpose, we carried out a survey targeting middle school students who were vulnerable to smart phone addiction, and 1,400 middle school students responded to questionnaire. The results showed that the moderated mediation effect of self-control was statistically significant. In detail, school satisfaction and school performance, the sub-factors of school adaptation, showed significant results but social relation non-significant. Concerning moderating effect of self-control, results supported significantly moderating effect, demonstrating that high level of self-control showed consistently lower level of smart phone addiction than low level of self-control regardless of level of neuroticism. We can find the meanings of this study in having demonstrated, on the one hand, the causal process of smart phone addiction, and on the other, moderating effect and moderated mediation effect on this causal process through interaction between neuroticism and self-control. Finally, limitations and suggestions for future research were discussed.

• KIPS Transactions on Computer and Communication Systems
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• v.2 no.12
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• pp.541-552
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• 2013

Recently software security of the smart phone is an important issue in the field of information science and technology due to fast propagation of smart technology in our life. The smart phone as the security critical systems which are utilizing in terminal systems of the banking, ubiquitous home management, airline passengers screening, and so on are related to the risk of costs, risk of loss, risk of availability, and risk by usage. For the security issues, software hazard analysis of smart phone is the key approaching method by use of observed failures. In this paper, we propose an efficient integrative framework for software security analysis of the smart phone using Fault Tree Analysis (FTA) and Failure Mode Effect Analysis (FMEA) to gain a convergence security and reliability analysis technique on hand handle devices. And we discuss about that if a failure mode effect analysis performs simpler, not only for improving security but also reducing failure effects on this smart device, the proposed integrative framework is a key solution.

• Proceedings of the IEEK Conference
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• 2000.11a
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• pp.129-132
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• 2000

This paper describes how to Implement dual band GSM hand set varying single band GSM phone. The idea can be extended to Triple mode design. Multiband design is important for global roamming and Baseband setup planning. Here H/W and SW issues are briefly described

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2010.05a
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• pp.588-589
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• 2010

• The Journal of the Acoustical Society of Korea
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• v.25 no.5
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• pp.213-221
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• 2006

Phone segmentation of speech waveform is especially important for concatenative text to speech synthesis which uses segmented corpora for the construction of synthetic units. because the quality of synthesized speech depends critically on the accuracy of the segmentation. In the beginning. the phone segmentation was manually performed. but it brings the huge effort and the large time delay. HMM-based approaches adopted from automatic speech recognition are most widely used for automatic segmentation in speech synthesis, providing a consistent and accurate phone labeling scheme. Even the HMM-based approach has been successful, it may locate a phone boundary at a different position than expected. In this paper. we categorized adjacent phoneme pairs and analyzed the mismatches between hand-labeled transcriptions and HMM-based labels. Then we described the dominant error patterns that must be improved for the speech synthesis. For the experiment. hand labeled standard Korean speech DB from ETRI was used as a reference DB. Time difference larger than 20ms between hand-labeled phoneme boundary and auto-aligned boundary is treated as an automatic segmentation error. Our experimental results from female speaker revealed that plosive-vowel, affricate-vowel and vowel-liquid pairs showed high accuracies, 99%, 99.5% and 99% respectively. But stop-nasal, stop-liquid and nasal-liquid pairs showed very low accuracies, 45%, 50% and 55%. And these from male speaker revealed similar tendency.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2011.05a
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• pp.307-309
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• 2011

The recently-released camera modules assembled into high-end handsets generally carry auto focusing function. The resolution size of the camera modules is getting higher, and customers demand more precise and stable auto focusing function. When auto focusing function is getting performed, the camera modules applied to VCM usually have the problems, which are an error of lens focusing position and resolution deviation according to the shift of one's position. For this reason, I propose Hybrid VCM that has an improved structure for a stable work of actuator and higher resolution level.

• Resources Recycling
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• v.22 no.4
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• pp.12-21
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• 2013

Waste electrical and electronic equipment(WEEE or E-waste) is one of the fastest growing waste stream in Korea. The proper management of such equipment has become of major concern for solid waste professionals because of the large growth of the waste stream and the presence of a myriad of toxic materials in it. In this paper, in order to evaluate the economical value of the recycling metallic materials from the E-waste, big size electrical home appliances, small size electrical home appliances, end of life hand phone and PCB(printed circuit board) were reviewed.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2002.05a
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• pp.197-200
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• 2002

The current Inn technique is many problems that is permission of radio station using RF Wireless Modem, that is influence of geographic obstacle using radio wave, that is frequency interference, that is finiteness of frequency resources. In this paper, we are solved many elements, IM replaces RF Wireless Modem, we suggest transmission technique of correction message using mobile phone, we researched Interface Module development which is linkage of DGPS receiver and mobile phone. IM can transmit correction message passing RS-232 port and modem communication control. IM of base station is initialized RS-232 port and modem to move station for correction message transmission, IM waited response mode. IM of move station is initialized RS-232 port and modem, IM requests hand shaking to base station, completed connection establishment. Users are worked Differential surveying using receiving correction message between mobile phones.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.341-345
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• 2009

We present an augmented reality (AR) application for cell phone where users put a virtual pet on their palms and play/interact with the pet by moving their hands and fingers naturally. The application is fundamentally based on hand/palm pose recognition and finger motion estimation, which is the main concern in this paper. We propose a fast and efficient hand/palm pose recognition method which uses natural features (e.g. direction, width, contour shape of hand region) extracted from a hand image with prior knowledge for hand shape or geometry (e.g. its approximated shape when a palm is open, length ratio between palm width and pal height). We also propose a natural interaction method which recognizes natural motion of fingers such as opening/closing palm based on fingertip tracking. Based on the proposed methods, we developed and tested the AR application on an ultra-mobile PC (UMPC).

• Science of Emotion and Sensibility
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• v.13 no.4
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• pp.761-768
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• 2010

Research from many marketing fields shows that the importance of factors which ultimately reflect customers' satisfaction towards a product or service vary with the progression of time. Likewise, the emotions that users experience from using the product can vary with prolonged interaction with the product itself. Thus, research was conducted under the notion that users' emotions at the initial stage of product usage is likely to vary with that at a later stage, when users would have had more experience with the product. In this research, a comparison was made between the emotions felt by customers with first-hand experience with the iPhone and those felt by long-time iPhone users who already had much more opportunities to familiarize themselves with the product. The results of the research conducted above show that, with first usage of the iPhone, users experience a relatively low level of negative emotions(Uncomfortableness) due to the predominance of the users' positive emotions. Over prolonged usage, however, the level of negative emotions associated with the usage of the iPhone has been shown to increase. Still, it is impossible to state that the Uncomfortableness associated with iPhone usage is high in general. In fact, it has been shown that positive emotions were rather experienced by iPhone users both before and after usage, suggesting that the emotions involved during iPhone usage was generally positive. Although more research would need to be conducted to safeguard this claim, it can be generally deduced from the results of this research that:when using a product, positive emotions in terms of the reflective level accounts for much of the negative emotions(i.e. discomfort) associated with behavioral level with regard to the product itself.