• 한국ITS학회 논문지
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• 제5권2호
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• pp.29-43
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• 2006

교통정보 제공방법중의 하나로서 기 제공되고 있는 고속도로 ARS서비스는 주행 중 소통정보를 제공하는 유용한 방법이나 하나의 정보를 제공받기 위하여 여러 번의 핸드폰 조작이 요구된다. 그러나 운전 중 휴대폰의 사용은 도로교통법에 의거 위법사항 일뿐만 아니라 운전자의 집중력을 분산시킴으로써 집중력 저하구간을 발생시켜 안전문제에 심각한 영향을 주고 있다. 따라서, 본 연구는 기존의 ARS교통정보 서비스의 제공방식에 대한 문제점을 분석하여 개선된 문제점을 바탕으로 보다나은 교통정보 제공 형태를 제시하기 위하여 기 제공되고 있는 고속도로 ARS이용현황 자료와 고속도로 구간속도자료를 수집 분석하여 서비스의 문제점 도출 및 개선된 보다 나은 교통정보 제공 형태를 제시하였다. 또한, 선호도 조사기법을 통하여 분석된 두 방식 간 안전성과 편리성을 비교함으로써 제시된 제공형태의 효과를 검증하고, 비시장재의 가치 측정 방법인 조건부가치 측정법 (CVM)을 도입하여 이용자들의 지불의사 금액을 바탕으로 개선된 교통정보 제공 형태의 가치를 측정하였다.

• 한국전자거래학회:학술대회논문집
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• 한국전자거래학회 2005년도 종합학술대회
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• pp.78-84
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• 2005

As the research activities related to 'Ubiquitous Computing' whose concept was introduced by Mark Weiser are growing, RFID(Radio Frequency Identification) technology has recently gained attention as a technology to advance the ubiquitous computing and a lot of related researches are also in progress. Research works done so far are mainly linked to the situation that the research outputs apply to meet the requirements for asset tracking and data sharing with partners over supply chain by using fixed RFID readers. However, it is essential that users have access to real-time information about the tagged objects and services whenever and wherever they want in the era of ubiquitous computing, so mobile devices-including PDA, smart phone, cellular phone, etc - which are equipped with an RFID reader can be regarded as an essential terminal for users living in ubiquitous computing environment. As far as the application with mobile devices are concerned, there are many considerations due to their limited capabilities of data processing, battery consumption and so on. In this paper, we review the generic RFID network model and introduce the revised RFID network model in consideration of incorporation with mobile devices equipped with an RFID reader. Also, we derive the requirements for software embedded within an RFID- enabled mobile terminal and then discuss essential components for implementation. Moreover, we develop the applications for asset management at museum by using mobile RFID network model.

• 음성과학
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• 제15권2호
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• pp.79-88
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• 2008

Recently demands for the speech technology-based products targeted for the mobile terminals such as cellular phones and PDA are rapidly increasing. And voting-based speaker identification algorithm is known to have a good performance in the mobile environment, since it works well with small amount of speaker training data. In this paper, we proposed a method to improve the performance of this voting based speaker identification system by using the observation confidence value which is derived from the function of SNR each frame. The proposed method is evaluated with ETRI cellular phone DB which is made for the speaker recognition task. The experimental results show that the proposed method has better performance of 2-3% identification rate than the conventional GMM method.

• 디지털융복합연구
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• 제15권1호
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• pp.1-9
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• 2017

이 연구의 목적은 청소년의 성별과 학교급별 휴대전화 과다사용의 차이를 규명하는 것이다. 연구를 위해 경기도 소재의 남녀공학 중 고등학교를 각 1개씩 편의표집하고, 휴대전화 과다사용을 측정하는 자기보고식 검사지를 이용하여 자료 수집하였으며, 565명의 자료 중 휴대전화 과다사용 수준이 표본 평균보다 높은 253명을 추출하여 일원다변량분산분석을 통해 연구문제를 검증하였다. 다변량분산분석결과가 통계적으로 유의하였다. 추가적인 단변량 분석 결과에서 성별에 따른 차이는 '일상생활장애'와 '내성' 요인에, 학교급에 따른 차이는 '학교생활장애', '일상생활장애', '긍정적기대' 요인에 대한 차이가 통계적으로 유의하였다. 단계적 분석을 적용할 경우 성별 차이는 '일상생활장애'에서, 학교급별 차이는 '긍정적기대'를 제외한 4개 요인에서 통계적 유의성이 나타났다. 연구결과를 통해 휴대전화 과다사용 예방과 치료에 있어서 성별과 학교급과 같은 사용자의 기본 특성이 고려되어야 함을 논의하였다.

• 종양간호연구
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• 제7권2호
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• pp.162-168
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• 2007

Purpose: This study was aimed to compare two different kinds of pre-operational education methods on nursing care satisfaction and anxiety among family members of cancer patients. Methods: This research used a quasi-experimental design. A total of 80 patients participated in the study. Forty subjects who were in the experimental group were assigned to be received mobile text-information via cellular phone, whereas control group was given the direct messages from nurses during peri-operative time. Peri-operative family needs and anxiety were measured and analyzed by X2-test and t-test. Result: There was no statistically significant difference in the levels of peri-operative family needs satisfaction and the levels of state anxiety between the two groups (p= .05). Conclusion: Based upon these findings, the nursing intervention with cellular phone short message could be as effective as direct peri-operative information in reducing the level of state anxiety and in increasing of the level of nursing care satisfaction among the family members of cancer patients.

• 한국품질경영학회:학술대회논문집
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• 한국품질경영학회 2007년도 춘계학술대회
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• pp.76-82
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• 2007

Upon the basis at the end of March 2005, we have the 38.91 million cellular phone subscribers over the country and the total diffusion rate of the cellular phone is reached up to 76.1%. At this moment, it can be said the most people use it since the demand is still going on. Turning to the operation company, this is serviced by the SK Telecom, LG Telecom, and KTF, and there are at least 7 manufactures producing it including Samsung, LG, KTF ever, Motorola, SKY, Pantac and Curitel, Most users periodically change the service vendor to the others for buying new model or changing the service vendor. It is understood the customer's action occurred by the differences of the brand cognition. In this study, along with some parameters including the difference of the vendor's brand cognition, difference of satisfaction (mobile telecommunication, product), and the possibility to buy the product again, I am going to find out the relationship between the satisfaction of the provider's service

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2008년도 춘계학술대회
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• pp.401-415
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• 2008

Upon the basis at the end of March 2005, we have the 38.91 million cellular phone subscribers over the country and the total diffusion rate of the cellular phone is reached up to 76.1%. At this moment, it can be said the most people use it since the demand is still going on. Turning to the operation company, this is serviced by the SK Telecom, LG Telecom, and KTF, and there are at least 6 manufactures producing it including Samsung, LG, KTF ever, Motorola an d SKY. Most users periodically change the service vendor to the others for buying new model or changing the service vendor. It is understood the customer's action occurred by the differences of the brand cognition. In this study, along with some parameters including the difference of the vendor's difference of satisfaction (mobile telecommunication, product), and the possibility to buy the product again, I am going to find out the relationship between the satisfaction of the provider's service.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2008년도 하계학술대회 논문집
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• pp.345-347
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• 2008

실제 휴대폰 환경에서 쓰이고 있는 전력 시스템이 어떻게 되어 있는지 고찰해보고, 어떤 것들이 문제가 되고 있으며, 그 해결방안으로는 어떤 것들이 있는지 알아본다. 각 regulator의 정의와 그 spec에 대하여 장단점 분석과 함께 실무적으로 어떻게 응용되고 있으며 미래의 발전방향은 어떻게 될 것인지 고찰한다. SoC(System on Chip)의 결정체인 휴대폰에서 전력 시스템 디자인이 차지하는 그 영향에 대해 논하고 그 application 관점에서 체크리스트를 만들어보기로 한다.

• 한국정보시스템학회지:정보시스템연구
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• 제15권4호
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• pp.189-209
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• 2006

The progress of mobile internet technologies has changed user access to information. The mobile internet allows to obtain contents and services from wireless networks via mobile devices. The purpose of this study is th find out important factors that influence on the customer purchase intention by mobile internet environment. Base on TAM(Technology Acceptance Model) and the latest literature, a comprehensive set of constructs and hypotheses were compiled with a methodology for testing them. We suggested five factors that effect purchase intention in mobile internet environment: Enjoyment Ease of use, Usefulness, Mobility, Trust To validate the research model, we collected data from cellular phone user using an online survey. The results of this study are as follows. First enjoyment ease of un, usefulness, and mobility had positive effects on trust. Second, Usefulness, ease of use, and trust had positive effects on purchase intention to use mobile internet. Third, enjoyment and mobility did not have positive effects on purchase intention to use mobile internet. Based on these results, we suggest marketing strategies.

• 한국통신학회논문지
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• 제35권12B호
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• pp.1199-1210
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• 2010

최근 Ad-hoc 통신과 관련하여 기회 컴퓨팅(Opportunistic Computing)에 대한 관심이 점차로 커지고 있으며 실질적인 서비스 및 관련된 요구사항에 대한 연구가 크게 요구되고 있다. 본 논문에서는 가상의 기회 컴퓨팅 응용서비스인 "어린이 보호 시스템"에 대해 먼저 논의하고 이 서비스에 적합하도록 새롭게 제작된 사용자용 Ad-hoc 통신 장치인 휴대폰 연동형 노드(uMobile)와 의복내장형 노드(uClo)를 제안한다. uMobile은 휴대폰에 연결되어 휴대폰 통신과 Ad-hoc 통신을 연동할 수 있고 uClo는 다양한 센서를 사용하여 사용자의 상태정보를 인식하며 의복에 내장될 수 있도록 제작되었다. 개발된 통신 장치를 사용하여 위치인식과 상황인지 서비스를 구현하였고 실제 실내 환경에서 테스트하여 그 결과를 나타내었다. 본 연구가 기회 컴퓨팅 기반의 다양한 서비스를 위한 참조 서비스로 활용될 수 있을 것으로 기대한다.