• 한국전자거래학회지
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• 제17권2호
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• pp.115-127
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• 2012

본 연구에서는 국가 간 이동통신서비스의 확산과정에서 국가 간 영향에 의해 한 국가에서의 확산성과가 다른 국가의 확산에 주는 영향을 분석하였다. 그동안 대부분의 이동통신서비스 확산에 대한 국가 간 비교연구들은 주로 국가별로 추정된 확산과정에 대해 사후적인 비교 분석이 일반적인 것에 반하여, 본 연구에서는 최근의 이동통신서비스의 확산이 국경을 넘어 영향을 미치고 있는 현실을 보다 적절히 설명할 수 있다. 본 연구에서는 이를 위하여 다국가 확산모형을 이용하여 한국과 중국, 미국, 일본, 홍콩 등 5개국에서의 이동통신서비스의 확산 과정을 분석하였다. 분석 결과 중국의 이동통신서비스의 확산은 한국, 미국, 일본, 홍콩 등 주변 국가들에서의 이동통신서비스의 확산에 유의한 영향을 받은 것으로 밝혀졌다.

• 대한인간공학회지
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• 제30권6호
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• pp.765-773
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• 2011

Objective: This study aims towards exploring a model of the HCI evaluation methods to improve the usability of mobile device, based on a case of a Mobile PDA system in a Museum context. Background: Mobile PDA systems in a Museum context is widely utilized for the educational purposes, but it is criticized for low usability that the device only play a role in textbooks on legs without any interactive educational activities. Therefore, the usability improvements on the mobile PDA system should be considered. Method 1: This model was developed with a combination of the expert review and the user testing, and with a combination of the qualitative and quantitative studies. In more details, first of all, a qualitative study was conducted as a combination of three different methods: 1) expert review with heuristics, 2) interviews with persons working in a museum, and 3) contextual enquiry. Results 1: The experts review provided with critical usability issues, and the semi-constructive interview helped to understand the background of the mobile device. Lastly, the contextual enquiry showed user experience problems and directions of improving the device from user's perspective. Method 2: Based on the results of the qualitative study, a questionnaire was designed. Results 2: The analysis of the quantitative study was conducted to generalize the problems, and prioritize the direction of improving the device within the limitation of the cost and time in a museum. Conclusion: This study has implications in developing an example of a HCI evaluation model to improve the user experience of the mobile device as well as finding problems and directions of how to improve the mobile PDA systems in the museum. Application: In fact, most of the studies related to the evaluation of the mobile device have been conducted in a laboratory context due to the cost and time. This paper, however, attempted to apply to various HCI research techniques from different constituents in real context.

• 아태비즈니스연구
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• 제8권1호
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• pp.15-32
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• 2017

This study was designed to examine the antecedents of mobile app usage among smart phone users. An extended TAM, which included the additional factors of perceived enjoyment, perceived informative usefulness and perceived social usefulness, was applied to predict people's intention to use mobile apps. Overall, the hypothesized research model did a fairly good job explaining significant associations between the independent variables and the dependent variable. The findings had showed that perceived social usefulness, perceived enjoyment and attitude were significantly affect intention to use mobile apps. Meanwhile, perceived ease of use (PEOU) and perceived informative usefulness were not significantly effects attitude towards intention to use mobile apps. Therefore, mobile apps developers should develop mobile apps that are easier for the users to seek information. For the information available should be more precise and bringing more benefits to the users.

• 디지털융복합연구
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• 제13권4호
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• pp.69-79
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• 2015

증강현실까지도 구현할 수 있는 기능을 가진 스마트폰의 보급률이 높아지면서 그 활용 범위도 급격하게 증가하고 있다. 그러나 다양한 기능이 있음에도 학습용 앱은 부족한 상황이다. 모바일의 장점인 이동성은 학습자가 시공간의 제한 없이 학습할 수 있지만 학습자가 학습하는데 적합하지 않은 장소도 제공될 수 있다는 의미이다. 이러한 관점에서 학습 동기를 유발시키고 지속시킬 모바일 기반 학습용 앱이 필요한 상황이다. 본 논문에서는 ARCS 이론의 동기 전략과 웹 기반 콘텐츠의 UI를 분석하여 모바일 학습용 앱 설계 시 고려할 사항을 제안하였다. 또한, ARCS 이론을 적용한 모바일 학습용 앱 설계의 절차적 모형을 구안하고 이를 바탕으로 모바일 학습용 앱 설계 방안을 제안하였다.

• 한국IT서비스학회지
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• 제11권3호
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• pp.269-285
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• 2012

The spontaneous interoperation is an important characteristic of ubiquitous applications and is closely related with mobility. The mobile components in ubiquitous environments are liable to appear in and disappear from one physical space to another. Because this characteristic certainly influences the structure and behavior of applications, they should adapt themselves to the changed environments by configuring their structure and behaviors. Consequently, developers are faced with the above challenging issue when they design and implement ubiquitous applications. The role concept is an efficient tool to model participant entities, their relationship, and collaboration, so role-based model are appropriate to describe a structure and behavior of software system. But, little attention has been given to reflect characteristics of ubiquitous applications. To tackle the problem, this study considers a ubiquitous application as a software organization which consists of software components and proposes an enhanced role-based application model for supporting spontaneous interoperation.

• 한국공간구조학회논문집
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• 제14권4호
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• pp.39-46
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• 2014

In Seoul, total 27 places of foot-bridges were chosen to evaluate the damping ratio through vibration measurement by mobile-phone application. Model vibration test was performed to compare the natural frequency and damping ratio between the conventional accelerometer and mobile-phone application. Measured average damping was compared with the one of Bachmann. The relation between the damping ratio and span was also investigated. Measured average damping ratio was greater than that of Bachmann. It was shown that there is no distinct trend between damping and span.

• 산업공학
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• 제16권spc호
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• pp.28-32
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• 2003

In this paper, the fuzzy group method data handling-type(GMDH) neural networks and their application to the forecasting of mobile communication system are described. At present, GMDH family of modeling algorithms discovers the structure of empirical models and it gives only the way to get the most accurate identification and demand forecasts in case of noised and short input sampling. In distinction to neural networks, the results are explicit mathematical models, obtained in a relative short time. In this paper, an adaptive learning network is proposed as a kind of neuro-fuzzy GMDH. The proposed method can be reinterpreted as a multi-stage fuzzy decision rule which is called as the neuro-fuzzy GMDH. The GMDH-type neural networks have several advantages compared with conventional multi-layered GMDH models. Therefore, many types of nonlinear systems can be automatically modeled by using the neuro-fuzzy GMDH. The computer program is developed and successful applications are shown in the field of estimating problem of mobile communication with the number of factors considered.

• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2006년도 추계학술대회
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• pp.315-321
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• 2006

• 패션비즈니스
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• 제18권1호
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• pp.1-21
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• 2014

This study exceeds the view on the fragmentary fact-finding surveys related to the application of mobile commerce which further develops the evaluation model of fashion mobile commerce website and considers the validity of comprehensive fashion mobile commerce with quality evaluation factors according to the Task-Technology Fit. To fulfill the study objectives, a total of 433 questionnaires are being conducted to the customers with first-hand experience on fashion merchandises through mobile commerce. The judgement sampling method is employed according to the sample population ages from 20s to 30s during two months period. Based on the results of the above-mentioned path analysis, we have observed the following: First, the path relation analysis results show that the M-marketing (M-marketing) between perceived usabilities had effects to the perceived usability and the M-sales had effects to the perceived usability. Second, as seen from the fashion mobile shopping conformance (TTF), the perceived usability, customer satisfaction, and path pipe analysis result conformances between perceived values and immersions have effects of perceived usability, customer satisfaction and perceived value, and thus, indicate that the perceived usability had effects on the customer satisfaction and immersion. Third, the customer satisfaction, perceived value and immersion all have effects on the purchasing intention.

• 한국정보과학회논문지:정보통신
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• 제33권5호
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• pp.380-394
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• 2006

전통적인 인터넷 서비스는 어플리케이션이나 사용자의 특성을 고려하지 않은 best-effort 서비스만을 제공하고 있다. 그러나 무선 및 인터넷 기술이 발전함에 따라 다기능 휴대전화, PDA 등을 이용한 DMB, VoD 서비스, 원격진료, 전자 결제 서비스 둥의 새로운 어플리케이션은 각각의 서비스에 적합한 서비스 품질(QoS) 뿐만 아니라 통신중 호스트의 자유로운 이동성을 요구하고 있다. 본 논문에서는 이동 단말의 이동성 관리 및 어플리케이션에 따라 적합한 QoS를 제공하기 위하여 mobile IPv6 망에 Diffserv 모델을 적용하여 이동성 관리를 위한 동작 절차와 차별화 서비스 제공을 위한 모델을 제안하였다. 또한 이동 단말의 이동범위에 따라 차별화된 서비스를 위한 통신비용 분석 모델을 제안하고 서비스 비용을 분석 하였다.