• Proceedings of the Korean Operations and Management Science Society Conference
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• 2005.05a
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• pp.554-559
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• 2005

It seems to be dangerous to use a cellular phone while driving since it increases driver's mental stress and makes driver's reaction time slow. This study is to investigate driver's psycho-physiological responses on mobile telephoning while driving. Among the three experimental factors (mobile-phone types, message IODs over mobile-phone, road types), only the message IODs over mobile-phone changed R-R intervals of electrocardiograph significantly. This result suggests that the regulations on the mobile telephoning while driving be changed.

• Journal of electromagnetic engineering and science
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• v.15 no.3
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• pp.167-172
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• 2015

Research results on possible effects caused by radiofrequency fields in children are limited because most of the studies published so far have focused on adults, rather than children. Mobile phone use is now widespread, even among younger children. If a biological risk due to mobile phone exposure is found, it might be greater in children because their bodies might be more sensitive to radiofrequency energy. The issue of a possible difference in sensitivity between adults and children begins with whether any difference exists physically in terms of electromagnetic absorption. This paper presents a review of recent publications on dosimetric comparisons between children and adults with respect to radiation from mobile phones. The issue of the health effects of mobile phone use is beyond the scope of the present review. Most of the dosimetry research on possible differences in power absorption between children and adults has been based on numerical modeling and analysis. The understanding of the results so far is presented and needed studies are described.

• International Commerce and Information Review
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• v.16 no.4
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• pp.35-54
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• 2014

Since smart phone users are continually increasing, smart phone based mobile banking users are increasing too. Therefore this study analyzes behavior of smart phone based mobile banking users. This study surveyed 400 people aged 10 to 50. The survey shows social effect influences convenience of smart-phone based mobile banking, perceived danger, and perceived security. Also,'promptness', the element of convenience has influence on trust. As perceived danger was higher, it was more vulnerable to resistance. The intention of smart-phone based mobile banking was influenced by trust and resistance. Specifically rising of intention was more influenced by lifting trust than lowering resistance.

• Journal of Veterinary Clinics
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• v.37 no.3
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• pp.130-134
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• 2020

This study aimed to confirm the effects that the mobile phone has on Electroretinogram (ERG). The ERG responses of three groups of healthy dogs, five in each group, were studied. ERG test was performed consecutively before and after the mobile phone was carried out. For group A, music was played with the sound on; for group B, music was played but the sound off; and for group C, the phone was set on the airplane mode. In the presence of a mobile phone, the amplitudes of a- and b-wave were increased in all groups. The a- and b-wave amplitudes at the flash intensity of 3,000 mcd·s/㎡ were significantly increased in all groups (p < 0.05). Based on the results, it is recommended to conduct ERG test in the absence of a mobile phone for the accurate evaluation of the retinal function.

• Journal of the Korea Society of Computer and Information
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• v.9 no.4 s.32
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• pp.141-147
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• 2004

Recently, Mobile phone became a great member of people. It is increased an use of mobile phone a population. According to mobile phone service. Also a carrying along like CDMA terminal became a small size. a light weight. A phone increased in an environment mobile phone service. For the reason it is demand as necessary evaluation iterms development and test environment construct. In this thesis. mobile phone service an environment is necessary an test principal and interest. wireless network is used Wireless Data. To recommand a Wireless Data quality evaluation method and to look upon next generation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.6
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• pp.1237-1244
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• 2009

In this paper, we proposed a mobile phone payment system using light signal containing payment related information. The digicard system we proposed creates virtual mobile card such as credit numbers and the created information is loaded in mobile phone. The virtual card information should be changed to pulse signal by light signal devices of mobile phone and the specific digicard system reader is able to read light signal. In recent years, a mobile phone payment system has been developed in order to provide user's convenience. But the mobile phone payment system has problems such as the production costs and complex and large size. In order to solve the aforementioned problems, we proposed mobile phone payment system being implemented by updating software without additional hardware modules. Therefore it is possible to apply the proposed digicard system to all kinds of mobile phone. Also encryption module is implemented to solve the problem of the security and privacy. According to an aspect of the present invention, there is provided a mobile phone payment system using a light signal containing payment-related information, comprising: a mobile phone; a photo receiver: and a control server.

• Science of Emotion and Sensibility
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• v.10 no.3
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• pp.481-489
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• 2007

The purpose of this study was to investigate whether there were differences in sound quality among telecommunication service providers(SPs). To avoid the influence of brand of SPs and mobile phone manufacturer, a series of structured experiments was planed. Possible source of sound difference were tested such as specific genres of music, contents providers, mp3 players for PC, and mobile phone manufacturers. The results show there are differences of sound quality among telecommunication service providers(SPs). But the difference comes from contents, mobile phone, and MP3 player for PC. The same model of mobile phone from the manufacturer sounded differently depending on telecommunication service providers(SPs). The genre of music did not show consistent difference in sound quality.

• 한국정보교육학회:학술대회논문집
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• 2010.08a
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• pp.199-207
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• 2010

Making use of mobile in the education field with international providing of iPod, iPhone and the rapid growth of information oriented society suggest lots of ideas in the aspect of method of education. Using the various technology of iPod and iPhone leads to change of teaching method because iPod and iPhone supports lots of skills of teaching which is student-centered is gradually supplying to students. Furthermore, Not only the development of various mobile contents can be materialized in iPod circumstance is processing in information-communication field of Korea, but also a recognition of people about iPod and iPhone is changing positively. Along this change, it expects to using of iPod and iPhone for teaching methods in school will affect to the education effectively and promote the quality of education. So, this study was focused on the development application for using iPod and iPhone in each subjects of Society and Science according to this features of changes with expecting the educational effect accompanied by using iPod and iPhone and searched the previous examples of using mobile application.

• Journal of Digital Convergence
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• v.8 no.1
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• pp.109-120
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• 2010

Mobile phone-related industries have been mainly concentrated on attracting the new customers and increasing the market share such as for the aggressive marketing activities, but it is the time to find an effective strategy to preserve existing customers since the mobile phone market had already reached the saturation. In this study, the properties of mobile phone that influence on the choice of handset and telecom company were analyzed. General properties of respondents were explored and the mobile phone properties were grouped by common factors. And analyzed the effect of factors on customer satisfaction with structural equation model. 10.4% of respondents are used their handset more than two years and 48.7% wanted to purchase other manufacturer's handset if they repurchase mobile phone. These results might come form the fact that the life cycle of mobile phone become shorter by the heating competition in mobile phone market and, to some degree, the influence of smart phone which recently become globally popular. Four factors, 'Hardware Quality', 'Practicality', 'Convergence Functions' and 'Level of Awareness', are induced from the mobile phone properties. In Structural Equation Model analysis, 'Hardware Quality' and 'Practicality' have significant and positive effects on Customer Satisfaction. But, 'Awareness' such as brand and trend appeared quite less influence on the customer satisfaction.

• Journal of Sensor Science and Technology
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• v.21 no.4
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• pp.241-248
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• 2012

Recently healthcare industry such as pharmaceutical, medical device and healthcare service technology is growing significantly. Mobile healthcare has attracted big attention due to IT convergence technology. Paradigm of healthcare has been changed from the 1st generation(communicable disease prevention) and the 2nd generation(treatment of disease due to extended life expectancy) to the 3rd generation(extended life expectancy due to prevention and control). In our study, we suggest the 3rd generation mobile healthcare system using Bluetooth based wearable ECG monitoring system and smart phone technology. The mobile healthcare system consists of wearable shirts with Bluetooth communication module, ECG sensor, battery, and mobile phone. The ECG data is obtained by a miniaturized sensor and the data is transferred to a mobile phone using Bluetooth communication. Then, user can monitor his/her own ECG signal on an application using Android in mobile phone. The Bluetooth communication device is used due to highly reliable data transmission property and the Bluetooth chip is embedded in every mobile phone. The wearable shirts with chest belt of Bluetooth ECG module is designed with a focus on convenience in the daily life of a wearer. The ECG signal evaluation software in Android based mobile phone is developed for the health check and the ECG signal variation is tested according to the activities of the wearer such as walking, climbing stairs, stand up and sit down, and so on.