• 대한임베디드공학회논문지
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• 제7권1호
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• pp.1-7
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• 2012

A Smartphone has an ability accessing Internet by URL stored in NFC(Near Field Communication) Tag for storing the information of items, blogs and web pages. Because the system works through the Internet with URL, however, it needs to pay some costs like communication fee and time. If we can store the web page on the tags, we can save the communication overhead. But they have too small memory to store it. In this paper, we introduce the Micro-Webpage technology which can be stored in NFC tag or QR(Quick Response) code. To make a Micro-Webpage, we remove control tags from the web page to leave a user original content. The removed control tags are stored in our smartphone application as a template. The user content is also compressed to a smaller one by an lossless compression algorithm. When a tag is read, the stored content is decompressed and, it is combined with the template to make the original web page. We have implemented a prototype of Micro-Webpage system on Android platform and confirmed that the prototype has reasonable performance improvements in saving memory and loading web page time.

• 한국컴퓨터정보학회논문지
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• 제22권10호
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• pp.47-54
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• 2017

In this paper, we propose a connected car platform architecture called Mobile Second for developing of verity convergence services. A Mobile Second platform architecture is designed to provide more powerful and diverse convergence services for vehicles and drivers by applying technologies of Connected Car and ICT Convergence in various ways. The Mobile Second platform is implemented by applying Tizen IVI and Android to hardware platforms for IVI, Nexcom's VTC1010 and Freescale's i.MX6q/dl respectively. The Mobile Second platform provides the driver with the vehicle's information via IVI devices, mobile devices and PCs, etc., and provides Vehicle Selective Gateway(VSG) and Vehicle Control Framework for the driver to control his/her vehicle, and also provides a web framework to enable the use of VSG's APIs for the monitoring and controlling the vehicle information in various mobile environments as well as IVI devices. Since the Mobile Second platform aims to create new variety of services for Connected Car, it includes service frameworks for Smart Care / Self diagonostics, Mood & Entertainment services, and Runtime, libraries and APIs needed for the development of related applications. The libraries given by the Mobile Second Platform provides both a native library for native application support and a Java Script-based library for web application support, minimizing the dependency on the platform and contributing the convenience of developers at the same time.

• 스마트미디어저널
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• 제1권4호
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• pp.18-26
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• 2012

스마트폰 어플리케이션 수의 증가는 새로운 유저인터페이스에 대한 중요성을 증대시켰으며, 다양한 센서를 융합한 유저인터페이스 개발 연구의 관심을 유도하고 있다. 본 논문에서는 스마트폰에 있는 가속도 센서, 자계 센서, 자이로 센서 정보를 융합하여 사용자 모션 제스처를 인식할 수 있는 새로운 유저인터페이스를 제안한다. 제안 방법은 유합 센서 정보로부터 스마트폰의 3차원 방위 정보를 구하고, HMM(Hidden Markov Model)을 이용하여 손동작 제스처를 인식한다. 특히 제안된 스마트폰의 3차원 방위 좌표계를 구면 좌표계로 변환하는 양자화 방법은 기본 축 회전에 더욱 민감한 인식이 이루어지도록 하였다. 실험을 통하여 제안한 방법이 93%로의 인식률을 보였다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2013년도 전력전자학술대회 논문집
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• pp.126-127
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• 2013

In industry, Supervisory Control and Data Acquisition (SCADA) system plays critical role to ensure production is monitored and controlled rigorously and in timely manner. Having a cost saving yet still effective SCADA system would be much desired by Industry. SCADA itself is a field with constant development and research like how this paper investigates on creating an extremely low cost device, which can be adapted to many different SCADA applications through some very basic programming when combined with relevant peripherals. Much of the process in some expensive SCADA application based on smartphone application is due to specialized communication infrastructure. This paper addresses the needs by developing low cost and integrated wireless SCADA system. The system features capability on accessing the performance of remotely situated device parameter, such as temperature, control analog or digital input output on real time basis. We use existing mobile network capability through Bluetooth communication channel.

• 문화기술의 융합
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• 제3권1호
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• pp.19-23
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• 2017

최근 스마트 폰 사용자가 늘어나면서 스마트 폰에 대한 여러 기능이 추가되고 있고 점점 더 발전되고 있으며, 실제로도 실생활에 편리함을 위해 도움이 되는 많은 Application이 나오고 있다. 본 연구에서는 보고 싶은 영화에 대한 정보를 뉴스 사이트 RSS로 XML 파서를 이용하여 영화와 관련된 뉴스기사를 호출하여 리스트로 출력하였다. 본 안드로이드앱 서버는 Ubuntu로 구축하였으며, 구축한 게시판을 통해 최신 영화정보까지 제공하도록 하였으며, 원하는 정보를 클릭하면 상세정보를 제공하는 메뉴로 배치하였다.

• 한국정보통신학회논문지
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• 제18권9호
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• pp.2272-2279
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• 2014

모바일 어플리케이션 시장은 지난 수년간 급속하게 확장되어 왔다. 이 논문에서는 모바일 디바이스의 이벤트 로그를 추적하여 스마트폰 어플리케이션의 사용량을 조사하는 기법을 제안하고 구현하였다. 이 시스템은 클라이언트 시스템과 사용성 분석 서버 시스템을 통하여 스마트폰 사용량에 대한 분석을 시도하였다. 이를 위하여 본 연구에서는 안드로이드 운영체제가 탑재된 디바이스에서 사용성 분석 플랫폼을 구현하였다. 또한, 분석 서버 시스템을 이용하여 47,000여명의 사용자 정보와 사용자의 앱 사용 정보를 실시간으로 수집하였다. 본 논문에서 우리는 대규모의 사용자 정보를 기반으로 하여 스마트폰의 사용 패턴과 사용 정보를 연구하였으며, 사용자를 위한 편리한 사용패턴 가시화 기능을 구현하였다.

• 스마트미디어저널
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• 제2권1호
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• pp.37-41
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• 2013

스마트폰의 차세대 인터페이스 연구의 일환인 지능형 사용자 인터페이스 플렛폼(Smart Use Interface Platform : SUIP)은 스마트폰의 플랫폼을 확장하기 위하여 연구되었으며 플랫폼 기능이 탑재된 외부 디바이스의 찾기와 해당 디바이스의 디바이스 드라이버의 동적 로딩기능 등을 가지고 있다. 본 논문은 지능형사용자 인터페이스 플렛폼에 직접 접속하기 힘든 센서네트워크나 기타 디바이스들을 중간에 변환과정을 통해 플렛폼에 접속이 가능하게 하며 아울러 접속된 디바이스의 기능을 강화할 수 있는 센서 등을 결합한 플랫폼 변환기인 SUIP 변환기를 구현하고 이에 대한 용용을 소개하고 있다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제11권8호
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• pp.3918-3934
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• 2017

This paper presents a viewport resolution scaling technique to reduce power consumption in mobile graphic processing units (GPUs). This technique controls the rendering resolution of applications in proportion to the resolution factor. In the mobile environment, it is essential to find an effective resolution factor to achieve low power consumption because both the resolution and power consumption of a GPU are in mutual trade-off. This paper presents a resolution factor that can minimize image quality degradation and gain power reduction. For this purpose, software and hardware viewport resolution scaling techniques are applied in the Android environment. Then, the correlation between image quality and power consumption is analyzed according to the resolution factor by conducting a benchmark analysis in the real commercial environment. Experimental results show that the power consumption decreased by 36.96% on average by the hardware viewport resolution scaling technique.

• 한국인공지능학회지
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• 제9권2호
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• pp.23-28
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• 2021

In this paper, we studied a system that can efficiently build security management for single-person households using Arduino, ESP32-CAM and PIR sensors, and proposed an Android app with an internet connection. The ESP32-CAM is an Arduino compatible board that supports both Wi-Fi, Bluetooth, and cameras using an ESP32-based processor. The PCB on-board antenna may be used independently, and the sensitivity may be expanded by separately connecting the external antenna. This system has implemented an Arduino-based Unauthorized intrusion system that can significantly help prevent crimes in single-person households using the combination of PIR sensors, Arduino devices, and smartphones. unauthorized intrusion system, showing the connection between Arduino Uno and ESP32-CAM and with smartphone applications. Recently, if daily quarantine is underway around us and it is necessary to verify the identity of visitors, it is expected that it will help maintain a safety net if this system is applied for the purpose of facial recognition and restricting some access. This technology is widely used to verify that the characters in the two images entered into the system are the same or to determine who the characters in the images are most similar to among those previously stored in the internal database. There is an advantage that it may be implemented in a low-power, low-cost environment through image recognition, comparison, feature point extraction, and comparison.

• 여성건강간호학회지
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• 제27권3호
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• pp.243-255
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• 2021

Purpose: This study aimed to develop a lifestyle modification (LSM) mobile application based on the Android operating system for overweight and obese breast cancer survivors (BCS) in Korea and evaluate its usability. Methods: The content analysis, design, development, implementation, and evaluation of the LSM intervention mobile application for overweight and obese BCS was conducted by identifying survivors' needs, searching the literature, and reviewing existing mobile applications. The survey was conducted from June 1 to December 28, 2020 at Jeonju, Korea. Results: The mobile application for BCS included dietary and exercise information, weight logs, as well as distress and daily achievement check. It also included information and videos on the prevention of breast cancer recurrence and used a communication bulletin board. Expert and user usability evaluation of its content and functions confirmed that it was appropriate and satisfactory for overweight and obese BCS. Conclusion: This LSM mobile application developed for overweight and obese BCS was found to be appropriate for use. It can be applied for further study of effectiveness on improving their health and maintaining a healthy lifestyle, to ultimately improve quality of life.