• Journal of Smart Tourism
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• 제1권2호
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• pp.37-46
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• 2021

The travel-related applications on a smartphone help tourists make a reservation before their trip conveniently; use a map, direction guidance, and translation services during the travel; evaluate and recommend travel services communicating with others after their journey. This study examines the relationships among affordances and constraints provided by the mini-program, users' perceived value, and travel-related mini-program (TRMP) usage by analyzing the structural equation modeling. An online questionnaire was developed from the available scales in the published literature. A total of 651 TRMP users responded to the survey, and 448 valid responses were included for analysis. Affordance, including physical, cognitive, sensory, and functional affordance, significantly influenced the hedonic value of TRMP; utilitarian value except for cognitive affordance. There were negative relationships between unfamiliarity and both types of value. The utilitarian and hedonic value of TRMP significantly influenced both the exploitative and explorative use of TRMP. Travel-related mobile applications are dramatically increased in the tourism field. This research sheds light on TRMP usage, as a new and smart device, from a user's perspective based on the affordance theory. This study represents a valuable direction regarding the emerging travel-related online platforms in tourism.

• Journal of Information Technology Applications and Management
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• 제23권2호
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• pp.239-261
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• 2016

Wide use of smart and high performing mobile device makes consumers use diverse distribution channels, composed of online and offline channel. Smart companies are trying to deploy omni channel. In order to successfully integrate these diverse channels, it is necessary to understand consumers' preference of channel choice. Thus, this study was focused on the influencing factors of channel preference such as price sensitivity, consumer innovativeness, time pressure, and need-for-touch. And this study compared these influencing factors between Korea and China, and drew meaningful message for e-commerce companies and offline distribution companies.

• Journal of the Optical Society of Korea
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• 제19권5호
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• pp.467-476
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• 2015

Finger vein recognition, which is a promising biometric method for identity authentication, has attracted significant attention. Considerable research focuses on transmission-type finger vein recognition, but this type of authentication is difficult to implement in mobile consumer devices. Therefore, reflection-type finger vein recognition should be developed. In the reflection-type vein recognition field, the majority of researchers concentrate on palm and palm dorsa patterns, and only a few pay attention to reflection-type finger vein recognition. Thus, this paper presents reflection-type finger vein recognition for biometric application that can be integrated into mobile consumer devices. A database is built to test the proposed algorithm. A novel method of region-of-interest localization for a finger vein image is introduced, and a scheme for effectively extracting finger vein features is proposed. Experiments demonstrate the feasibility of reflection-type finger vein recognition.

• 한국컴퓨터정보학회논문지
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• 제24권7호
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• pp.45-52
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• 2019

With the popularity of mobile Internet and smart phones, the domestic digital music access platform has entered a period of rapid development. Existing studies in the academic circle have shown that experience has a positive impact on user perception and loyalty. However, the research on the relationship between brand loyalty, user perception and user experience of Internet products has not received much attention. Starting from the brand loyalty theory and user experience theory, this paper explores the mechanism of user experience, user perception and brand loyalty of digital music access platform. Based on the development status of digital music access platform in China, the purpose is to explore how the user experience of the mainstream digital music access platform can affect Usefulness Perception, Epidemic Perception. And to explore how the Usefulness Perception, Epidemic Perception can affect users' brand loyalty. also further explore the role of users' perception in this process to understand the relationship between brand and user experience. In practical operations, 398 formal questionnaires were issued online to collect first-hand data, and reliability analysis, factor analysis, correlation analysis and hypothesis analysis were carried out successively on the data in the later stage. Through research, it is found that the user experience of digital music access platform has a partial significant impact on the perception and loyalty of applications. The visual presentation and emotional feelings of digital music access platform are positively correlated with the perceived usefulness of applications. The visual presentation and emotional feelings of digital music access platform are positively correlated with the perceived popularity of applications. The e perceived usefulness and perceived popularity of the digital music access platform are positively correlated with the loyalty of the application. Through this research, it has certain guiding significance to the promotion of digital music access platform's brand loyalty degree.

• 대한한의진단학회지
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• 제17권2호
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• pp.77-89
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• 2013

Objectives Tongue diagnosis is an important diagnostic method in traditional Eastern medicine, and it has a high potential to be used in the future healthcare because of easy, quick, and non-contact measuring features. Recently, research and development efforts on computerized tongue diagnosis systems (CTDS) have been active that led to the technical advancements in the field of photographing techniques, image extraction and classification algorithms. In this study, we analyzed the trends in the CTDS patents. Using the WIPS search engine (www.wipsglobal.com), quantitative and qualitative patent analyses were performed through Korea, China, Japan, U.S.A and Europe. Methods For a systematic search and data analysis, we defined patent categories based on the application area and technical details. By applying thus-obtained categorical key words, we obtained 360 relevant patents on photographing techniques, image extraction and classification algorithms for the purpose of diagnosis or security. Results As a result, companies related to image acquisition, medical imaging and mobile devices and research groups of universities in East Asia were major patent applicants. In all the five countries, the number of patents have been increasing since 1980. In particular, technology related to color correction and image segmentation were most actively patented categories, and expected to continue a high application rate.

• 대한임베디드공학회논문지
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• 제11권6호
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• pp.325-334
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• 2016

Recently, Open Computing Language (OpenCL) has been proposed to provide a framework that supports heterogeneous computing platforms. By using an OpenCL framework, digital communication systems can support various protocols in a unified computing environment to achieve both high portability and high performance. This article introduces a parallel software decoder of Low Density Parity Check (LDPC) codes for China Multimedia Mobile Broadcasting (CMMB) on a heterogeneous platform. Each step of LDPC decoding has different parallelization characteristics. In this paper, steps suitable for task-level parallelization are executed on the CPU, and steps suitable for data-level parallelization are processed by the GPU. To improve the performance of the proposed OpenCL kernels for LDPC decoding operations, explicit thread scheduling, loop-unrolling, and effective data transfer techniques are applied. The proposed LDPC decoder achieves high performance by using heterogeneous multi-core processors on a unified computing framework.

• 한국정보시스템학회지:정보시스템연구
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• 제24권1호
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• pp.95-117
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• 2015

중국은 2014년 말 스마트폰 사용자들이 5억 명을 넘어서면서 전 세계적으로 가장 큰 스마트폰 시장이 되었다. 스마트폰 제조기업은 인터넷 통신과 엔터테인먼트, 게임과 같은 응용프로그램을 통해 다양한 정보서비스를 제공하고 있다. 최근 모바일 서비스의 사용자 수용의도와 지속적인 사용의도에 관한 연구들이 많이 진행되었으나, 중국인들의 스마트폰 사용에 대해서는 명확히 규명된 것이 별로 없다. 본 연구는 중국 스마트폰 소비자들의 지속적인 사용의도에 영향을 미치는 요인을 도출하고, 그 영향관계를 규명하고자 한다. 이를 위해 스마트폰의 쾌락적 서비스와 확장된 TAM모형, 그리고 인지된 즐거움을 연구변수로 구성하여 연구모형을 제안한다. 본 연구는 개인적 특성을 고려한 혁신성, 사회적 영향, 서비스 품질을 반영한 연구모형을 구성하고 실증적 연구를 통해 주요 변수들간의 구조적 관계를 분석하였다. 중국의 스마트폰 서비스 사용자를 대상으로 설문조사를 수행한 결과, 인지된 유용성과 인지된 즐거움은 스마트폰 서비스의 지속적인 사용의도에 긍정적인 영향을 미치는 것으로 나타났다. 본 연구는 스마트폰 서비스의 재사용과 소비자를 유지하고 획득하기 위한 방법을 제안하고 실용적 유용성과 쾌락적 즐거움을 고려한 서비스 제공의 중요성을 제안하고 있다.

• 한국전자거래학회지
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• 제22권1호
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• pp.89-106
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• 2017

스마트폰과 태블릿 PC 등의 모바일 기기의 확산으로 세계 모바일 애플리케이션(Application, 이하 앱) 시장 규모가 확대되면서, 위치기반서비스(Location-Based Service: LBS)가 새로운 서비스로 주목 받고 있다. 하지만 LBS 앱 관련 제도와 법규가 이루어지지 못한 상태에서 LBS 앱이 빠르게 확산되면서 개인 사생활 침해 가능성 및 개인 정보유출과 같은 프라이버시 염려가 증가하고 있다. 본 연구는 중국과 한국 사용자가 사용하는 맛집 앱을 대상으로 LBS 앱 사용자의 인지된 가치를 살펴보고자 한다. 본 연구의 목적은 맛집 어플리케이션을 사용할 때 개인 정보를 제공함으로써 얻게 되는 인지된 가치와 그에 영향을 주는 변수들을 규명하고자 한다. 본 연구의 분석 결과는 다음과 같다. 소비자가 정보의 유용성을 인지하며 정보에 대한 통제능력이 높을수록 정보에 대한 인지된 가치가 증가하는 것을 증명하였다. 또한 위치기반서비스 앱 활용능력이 프라이버시 이익에 긍정적인 영향을 미치고 정보에 지각된 취약성이 프라이버시 위험에 부정적인 영향을 미치는 것을 증명하였다. 그리고 선행연구와 달리 위치기반서비스에 대한 인지된 가치는 프라이버시 계산에 구성되는 프라이버시 이익과 위험에 긍정적인 영향을 주었다.

• Journal of Communications and Networks
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• 제17권1호
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• pp.58-66
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• 2015

Aeronautical communication networks (ACN) is an emerging concept in which aeronautical stations (AS) are considered as a part of multi-tier network for the future wireless communication system. An AS could be a commercial plane, helicopter, or any other low orbit station, i.e., Unmanned air vehicle, high altitude platform. The goal of ACN is to provide high throughput and cost effective communication network for aeronautical applications (i.e., Air traffic control (ATC), air traffic management (ATM) communications, and commercial in-flight Internet activities), and terrestrial networks by using aeronautical platforms as a backbone. In this paper, we investigate the issues about connectivity, throughput, and delay in ACN. First, topology of ACN is presented as a simple mobile ad hoc network and connectivity analysis is provided. Then, by using information obtained from connectivity analysis, we investigate two communication models, i.e., single-hop and two-hop, in which each source AS is communicating with its destination AS with or without the help of intermediate relay AS, respectively. In our throughput analysis, we use the method of finding the maximum number of concurrent successful transmissions to derive ACN throughput upper bounds for the two communication models. We conclude that the two-hop model achieves greater throughput scaling than the single-hop model for ACN and multi-hop models cannot achieve better throughput scaling than two-hop model. Furthermore, since delay issue is more salient in two-hop communication, we characterize the delay performance and derive the closed-form average end-to-end delay for the two-hop model. Finally, computer simulations are performed and it is shown that ACN is robust in terms of throughput and delay performances.

• 한국정보과학회논문지:소프트웨어및응용
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• 제35권8호
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• pp.512-521
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• 2008

웹 기반 정보 서비스는, 웹 정보 서버와 상호작용하는, 다양한 인터넷 웹-브라우징 기기들과의 접근성과 사용성을 위해서 평가되어야 한다. 다양한 웹-브라우징 장치로(예: 풀부라우징 휴대폰) 접근 및 사용가능하며, 신뢰할 수 있는 유비쿼터스 웹 정보서버는 유비쿼터스 웹 정보 서비스뿐만 아니라 개인화된 광고기반의 비즈니스 모델을 위한 통합센터가 되어야 한다. 개인화된 유비쿼터스 웹 정보 서비스를 위한 웹 상호작용의 접근성과 사용성을, 실시간 평가를 위한 메트릭으로서, 연구하였다. 시험용 웹사이트 ('ktrip.net')와 1자 한글 도메인명(예: 김.net, 이.net, 박.net, 최.net, ㄱ.net, ㄴ.net ... ㅎ.net, ㅏ.net ... ㅔ.net, ㄱ.com, ㄴ.com ... ㅎ.com)을 사용하여, 구현 및 한국, 일본 및 중국에서의 실험을 바탕으로 한 실험적 결과를 소개한다.