• Journal of the Korea Society of Computer and Information
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• v.28 no.11
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• pp.65-71
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• 2023

In this paper, we design and implement the Walking Life Festival application, which is based on the Android platform and provides information about domestic travel destinations and regional festivals in South Korea. This application utilizes various sensors found in smartphones, including the Step Counter sensor, Step Detector sensor, Acceleration sensor, and GPS sensor. Additionally, it makes use of Google Map API and Public Open API to offer information about domestic travel destinations and local festivals. The application also incorporates an automatic login feature using the Shared Preference API. When storing login information in the database, it encrypts the input plaintext data using a hash algorithm. For Google Maps integration, it creates objects using the Google.maps.LatLngBounds() method and extends the location information through the extends method. Furthermore, this application contributes to the activation of the domestic tourism industry by notifying users about the timing of local festivals related to domestic travel destinations, thus increasing their opportunities to participate in these festivals.

• The Journal of Information Systems
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• v.24 no.2
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• pp.209-240
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• 2015

Purpose This study investigates the relationships between various attributes of smart banking (convenience, security, convergence, and economy), user features (familiarity and innovativeness), perceived usefulness, trust, satisfaction, and continuance intentions and provides a comparison of Google's Android OS and Apple's iOS. Design/methodology/approach We considered a sample of 245 respondents and used structural equation modeling to analyze the data. Findings The results indicate that convergence and familiarity significantly affected perceived usefulness and that security and economy significantly affected perceived trust in smart banking services. The relationships of security, economy, and innovativeness to perceived usefulness and those of convenience and familiarity to perceived trust were stronger for the Android OS than for iOS. The study contributes by proposing an integrated framework and providing a comparison between the Android OS and iOS in the context of smart banking.

• The Journal of the Korea Contents Association
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• v.12 no.1
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• pp.9-16
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• 2012

Though Android-based smart phones are being released in Korea, Korean TTS engine is not built on them and Google has not announced service or software developer's kit related to Korean TTS officially. Thus, application developers who want to include Korean TTS capability in their application have difficulties. In this paper, we design and implement Android OS-based Korean TTS system and service. For speed, text preprocessing and synthesis libraries are implemented using Android NDK. By using Java's thread mechanism and the AudioTrack class, the response time of TTS is minimized. For the test of implemented service, an application that reads incoming SMS is developed. The test shows that synthesized speech are generated in real-time for random sentences. By using the implemented Korean TTS service, Android application developers can transmit information easily through voice. Korean TTS service proposed and implemented in this paper overcomes shortcomings of the existing restrictive synthesis methods and provides the benefit for application developers and users.

• KIPS Transactions on Software and Data Engineering
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• v.4 no.1
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• pp.57-64
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• 2015

Activity recognition technology is gaining attention because it can provide useful information follow user's situation. In research of activity recognition before smartphone's dissemination, we had to infer user's activity by using independent sensor. But now, with development of IT industry, we can infer user's activity by using inner sensor of smartphone. So, more animated research of activity recognition is being implemented now. By applying activity recognition system, we can develop service like recommending application according to user's preference or providing information of route. Some previous activity recognition systems have a defect using up too much energy, because they use GPS sensor. On the other hand, activity recognition system which Google released recently (Google Activity Recognition) needs only a few power because it use 'Network Provider' instead of GPS. Thus it is suitable to smartphone application system. But through a result from testing performance of Google Activity Recognition, we found that is difficult to getting user's exact activity because of unnecessary activity element and some wrong recognition. So, in this paper, we describe problems of Google Activity Recognition and propose AGAR(Advanced Google Activity Recognition) applied method to improve accuracy level because we need more exact activity recognition for new service based on activity recognition. Also to appraise value of AGAR, we compare performance of other activity recognition systems and ours and explain an applied possibility of AGAR by developing exemplary program.

• International Journal of Internet, Broadcasting and Communication
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• v.10 no.2
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• pp.51-59
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• 2018

Health care has attracted a lot of attention, recently due to an increase in life expectancy and interest in health. Various biometric data of the user are collected by using the air pressure sensor, gyro sensor, acceleration sensor, and heart rate sensor to perform the Smart Health Care Activity Tracker function. Basically, smartphone application is made and tested for biometric data collection, but the Arduino platform and bio-signal measurement sensor are used to confirm the accuracy of the measured value of the smartphone. Use the Google Maps API to set user goals and provide guidance on the location of the user and the points the user wants. Also, the basic configuration of the main UI is composed of the screen of the camera, and it is possible for the user to confirm the forward while using the application, so that accident prevention is possible.

• International journal of advanced smart convergence
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• v.5 no.4
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• pp.57-65
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• 2016

This paper aims to improve the quality of cultural experience by providing a three - dimensional guide service that enables users to experience themselves without additional guides and cultural commentators using the latest mobile IT technology to enhance understanding of cultural heritage. In this paper, we propose a method of constructing cultural contents based on location information such as user / cultural heritage using markerless tracking based augmented reality and GPS. We use marker detection technology and markerless tracking technology to recognize smart augmented reality object accurately and accurate recognition according to the state of cultural heritage, and also use Android's Google map to locate the user. The purpose of this paper is to produce content for introducing cultural heritage using GPS and augmented reality based on Android. It can be used in combination with various objects beyond the limitation of existing augmented reality contents.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.11a
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• pp.1498-1501
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• 2011

스마트폰 시장의 성장 그리고 스마트폰 시장 내의 안드로이드 시장이 급성장함에 따라 안드로이드 기반의 다양한 앱에 대한 수요가 많아지고 있다. 그중에서도 안드로이드 앱에 대한 수요는 기하급수적으로 증가 하고 있다. 또한 스마트폰뿐만 아니라 타블릿PC 시장도 성장하면서 타블릿PC 앱에 대한 수요도 증가하고 있다. 하지만 타블릿PC 전용 앱의 개발은 아직 미흡하다. 본 논문에서는 안드로이드 타블릿PC 기반으로 스케줄링과 가계부를 지원하는 시스템의 설계 및 구현에 대한 내용을 기술한다. 또한 Android의 강점인 Google 계정과의 Synchronization을 통해 PC와 타블릿PC에서의 스케줄 관리를 할 수 있으며 자체적으로 만든 서버를 통하여 공공일정을 자신이 원하는 항목을 선택하여 다운로드하여 관리 할 수 있다. 가계부는 수입과 지출을 관리하고 그래프를 통하여 자신이 어느 정도로 사용을 하였는가를 확인할 수 있다.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.5
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• pp.283-290
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• 2012

In this paper, a system for wake-up method for T-DMB AEAS is introduced. Wake-up function is important in emergency alert service. But there was no AEAS receiver that has the method. Google C2DM is efficient method for wake-up in android platform. So this paper suggests wake-up method in android smartphone with T-DMB by C2DM. This method will be an alternative plan until native broadcasting wake-up technology.

• The KIPS Transactions:PartC
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• v.19C no.4
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• pp.235-238
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• 2012

Google Android provides market based application distribution to provide ease use of application services. While openness of Android allows various ways of application distribution, including installation of unsigned application. such openness also invokes critical threats such as the spread of malwares and the illegal distribution of applications. In order to prevent such threats, several distributors use on-line authentication techniques by using mobile subscriber's information. However such methods also have limits that even legal users cannot use their purchased application in situations. Therefore, in this paper, we discuss such problems and provide some ideas of authentication method that allow users to use their purchased application when users change their status.

• Journal of Satellite, Information and Communications
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• v.7 no.1
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• pp.48-52
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• 2012

As the growing popularity of smartphones, mobile web browsing has become one of the most important and popular applications in mobile devices. Furthermore, it is clear that the demand for PC-like full browser performance on mobile devices is increasing greatly. WebKit is an open source web browser engine adopted by Google Android. This paper proposed a technique of increasing the performance of WebKit by paralleling its libraries. This method was applied to JPEG library and the performance evaluation was conducted in PC environment. The results was used to estimate the performance prediction on multi-core mobile embedded architecture and to show the feasibility of the proposed method to estimate the performance gain on heterogeneous multi-core embedded architecture.