• Journal of Korea Multimedia Society
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• v.21 no.2
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• pp.261-270
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• 2018

Hearing-impaired people are increasing rapidly due to the global aging trend. Early detection of hearing loss requires an easy-to-use audiometry device for the public. Existing audiometry systems were developed as PC-based, PDA-based, or smartphone apps. These devices were often dependent on specific software platforms and hardware platforms. In this paper, we tried to improve software platform compatibility by using cross platform, and tried to implement IoT-based pure tone audiometry device which does not require sound pressure level correction due to hardware differences. Pure tone audiometry is available in a variety of ways depending on the type of hearing loss and age. Using the IoT-based audiometry device implemented in this paper, it will be possible for an app developer who lacks hardware knowledge to easily develop an app with various scenarios for hearing screening. The results of this study will contribute to overcoming the software and hardware dependency in the development of IoT-based healthcare device.

• Journal of the Korea Convergence Society
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• v.2 no.4
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• pp.9-14
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• 2011

Phishing is an attack to theft an user's identity by masquerading the user or the device. The number of phishing victims are sharply increased due to wide spread use of smart phones and messenger programs. Smart phones can operate various wi-fi based apps besides typical voice call and SMS functions. Generally, the messenger program such as Kakao Talk or Nate On is consisted of client and server functions. Thus, the authentication between the client and the server is essential to communicate securely. In this paper, we propose the messenger authentication protocol safe against smart phone phishing. To protect communications among clients, the proposed method provides message encryption and authentication functions.

• Journal of Convergence Society for SMB
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• v.5 no.3
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• pp.15-20
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• 2015

There have been consumer needs for mobile payment system due to the rapid increase in the number of smartphones and the use of them. In tum, the market has been expanding as IT companies begin to participate in the mobile payment system business. Moreover, since the system supports better services not only covering payment service but also interworking with various apps in devices, it has been maximizing the consumer convenience. Although the convenience increased due to the mobile payment system, the vulnerability in security also increased; and smartphone users have been afraid of using the mobile payment system. This study is to examine Samsung Pay and Apple Pay, to present the vulnerability, and to suggest a countermeasure.

• International Journal of Advanced Culture Technology
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• v.4 no.3
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• pp.13-19
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• 2016

The growth of mobile devices in Internet of Things (IoT) leads to a number of remote and controlling system related IoT applications. For instance, home automation controlling system uses client system such web apps on smartphone or web service to access the home server by sending control commands. The home server receives the command, then controls for instance the light system. The web service gateway responsible for handling clients' requests attests an internet latency when an increasing number of end users requests submit toward it. Therefore, this web service gateway fails to detect several commands, slows down predefined actions which should be performed without human intervention. In this paper, we investigate the performance of a web server-side platgorm based event-driven, non-blocking approach called Node.js against traditional thread-based server side approach to handle a large number of client requests simultaneously for remote and controlling system in IoT remote monitoring applications. The Node.JS is 40% faster than the traditional web server side features thread-based approach. The use of Node.js server-side handles a large number of clients' requests, then therefore, reduces delay in performing predefined actions automatically in IoT environment.

• Journal of Fashion Business
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• v.15 no.5
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• pp.129-143
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• 2011

The purpose of this study is to classify fashion brand app types through current fashion brand app releases. To this end, this study used Internet Web, articles, newspapers, and existing studies on brand applications as well as the data that were analyzed after downloading the relevant brand app. Firstly, this study aimed to analyze rapidly growing smartphone market and brand app market situations and look into brand app's own characteristics from the corporate marketing perspective. In addition, the study divided the types into a basic information type and an additional information type by analyzing functions of 30 fashion brand apps. As the result, the basic information type contains product info, store info, fashion info, and coordination info. The additional information type contains entertainment, hobbies, life info, mutual experiences, and sharing services. According to the divided fashion brand app types, the goals of companies also can be divided as three. Firstly, the aim is to expand sales, secondly to improve brand awareness, and lastly to build customer relationship. Consequently, companies will have to select brand app types suitable for their goals and provide to consumers.

• Child Health Nursing Research
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• v.25 no.2
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• pp.112-122
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• 2019

Purpose: The purpose of this study was to investigate the prevalence of diaper dermatitis (DD), knowledge of DD prevention and treatment, and diaper hygiene practices among mothers with diaper-wearing children. Methods: The participants were 176 mothers who presented to an outpatient clinic at a children's hospital with diaper-wearing children. Data were collected using a structured self-administered questionnaire. Results: The percent of correct answer for knowledge about DD was 59.7%. Almost half of the participants' children had experienced at least 1 episode of DD during the last 6 months. Inappropriate diaper hygiene practices, such as using talcum powder on DD and rubbing with a dry towel after cleansing, were reported. Moreover, only 37% of mothers used the recommended skin barrier to prevent DD. Although many children suffer from DD, levels of educational experience and perceived need for education on this topic were low. Almost 70% of mothers obtained DD-related information through internet sites. Conclusion: Educating parents about the etiology of DD and evidence-based diaper hygiene practices is an important aspect of effective DD prevention and treatment. Internet sites or smartphone apps may be effective methods for education on DD prevention and treatment considering parents' preferences for ways to obtain health information.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.31 no.1
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• pp.61-71
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• 2021

Instant messengers are a means of communication for modern people and can be used with smartphones and PCs respectively or connected with each other. Messengers, which provide various functions such as message, call, and file sharing, contain user behavior information regarded as important evidence in forensic investigation. However, it is difficult to analyze as well as acquire smartphone data because of the security of smartphones or apps. However, messenger data can be extracted through PC when the messenger is used on PC. In this paper, we obtained the credential data of Wire messenger in Windows 10, and showed that it is possible to log-in from another PC without authentication. In addition, we identified and classified major artifacts generated based on user behavior.

• International Journal of Computer Science & Network Security
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• v.21 no.4
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• pp.93-102
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• 2021

The world is facing an unprecedented economic, social and political crisis with the spread of COVID-19. The Corona Virus (COVID-19) and its global spread have resulted in declaring a pandemic by the World Health Organization. The deadly pandemic of 21st century has spread its wings across the globe with an exponential increase in the number of cases in many countries. The developing and underdeveloped countries are struggling hard to counter the rapidly growing and widespread challenge of COVID-19 because it has greatly influenced the global economies whereby the underdeveloped countries are more affected by its devastating impacts, especially the life of the low-income population. Information and Communication Technology (ICT) were particularly useful in spreading key emergency information and helping to maintain extensive social distancing. Updated information and testing results were published on national and local government websites. Mobile devices were used to support early testing and contact tracing. The government provided free smartphone apps that flagged infection hotspots with text alerts on testing and local cases. The purpose of this research work is to provide an in depth overview of emerging technologies and recent ICT developments to combat COVID-19 Pandemic. Finally, the author highlights open challenges in order to give future research directions.

• Journal of Distribution Science
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• v.20 no.10
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• pp.105-117
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• 2022

Purpose: The digital healthcare business is rapidly growing due to the COVID-19 pandemic, and the medical service platform business based on smartphone apps is globally expanding. This study targeted medical information online to offline (O2O) platform users in the medical service field. It verified the effect relationship revealed in the continuous use intention of the platform with the mediation of platform quality components, namely perceived benefits, flow experience, and use satisfaction. Research design, data and methodology: Based on previous studies, three medical information O2O platform quality components, namely system quality, information quality, and service quality, were defined. And the questionnaire survey was carried out targeting 359 leading medical information O2O platform users in Korea. Results: As a result of the analysis, it was confirmed that system quality and service quality had a positive (+) effect on satisfaction and continuous use intention with the mediation of perceived benefits and flow experience. Meanwhile, information quality had a negative effect (-) on perceived benefits and flow experience and did not affect use satisfaction and continuous use intention. Conclusions: Consequently, it was ascertained that the system quality and service quality affecting user behavior and experience were more significant factors than information quality to medical information O2O platform users from the medical service aspect.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.1401-1404
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• 2011

다양한 사용자의 요구를 충족 시키기 위해서 스마트폰 제조사들은 상이한 해상도의 스마트폰을 출시하고 있지만, 이것은 스마트폰 앱의 호환성 문제를 일으킬 수 있다. 호환성 문제는 서로 다른 해상도를 가진 스마트폰에서 동일한 앱을 실행했을 경우에 그 결과가 다른 현상을 말한다. 스마트폰의 해상도 차이에 따른 앱호환성 문제는 앞으로 더욱 심각해질 것으로 예상된다. 이러한 앱의 호환성을 판별하기 위하여 GUI 기반의 테스트 기법이 고려될 수 있다. 특히 해상도가 다른 두 스마트폰에서 동일한 앱의 실행 결과 화면의 화면 동등성 평가는 매우 어렵다. 본 논문에서는 이 문제를 극복하기 위하여 해상도가 다른 스마트폰의 앱 호환성을 평가하기 위한 화면 동등성을 판별하는 프레임워크를 제안한다. 상이한 해상도의 상용 스마트폰을 대상으로 앱의 실행화면 동등성 평가를 위해 단순 비교 기법과 VDP 기법의 성능 비교를 위한 실험 결과를 소개한다. 실험에서는 상이한 해상도의 스마트폰에서 동일한 앱의 실행 화면을 바탕으로 단순 비교 기법과 VDP 기법의 동등성 판별 성능을 비교한다. 실험 결과 사람의 시각 체계와 유사한 인지 능력을 보이는 VDP 가 화면의 동등성을 비교적 정확하게 판별하였다.