• 제어로봇시스템학회:학술대회논문집
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• 1997.10a
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• pp.752-755
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• 1997

In this paper, a scheduling algorithm is proposed for a programmable logic controller(PLC) with remote I/Os, assuming the multi-tasking facilities. Since sequence programs are executed on the application processor and I/O data are transmitted by the network processor concurrently, the proposed algorithm schedules the data transmission as well as the sequence program execution. The suggested algorithm guarantees the bounded WCRT(worst case response time), which is the one third of the WCRT in the absence of scheduling. Computer simulation shows that the algorithm can be easily applied to a real PLC without critical constraints on utilization of resources and inter-relation among tasks.

• Proceedings of the Korea Information Processing Society Conference
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• 2022.05a
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• pp.139-142
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• 2022

코로나-19와 미세먼지의 증가로 '반려 식물'과 '플랜테리어'에 대한 수요가 늘고있는 추세이다. 본 논문에서는 화분에 IoT를 접목하여, 스마트 화분을 구현하였다. 사용자 인터페이스를 iOS 앱으로 개발하였으며, 늘어나는 iPhone 사용자들에게 익숙한 UX/UI 디자인으로 구현하였다. 스마트폰 앱과 가정의 화분 서버가 인터넷으로 통신함으로써, 언제 어디서나 화분의 상태를 확인하고, 제어를 할 수 있게 구현하였다. 서버와 화분 모듈이 분리되어, 화분 자체의 크기를 줄였다. 화분 하단에 물통이 존재하여, 배액이 그대로 물통으로 흘러내려오는 순환식 구조를 채택하였기 때문에 '플랜테리어'에 적합한 모듈이 될 수 있을 것으로 기대한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.10a
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• pp.223-226
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• 2010

iPhone and Smart Phone domestic markets are activated with domestic coming out of galaxy S together and the users are increasing. It follows hereupon and with forensic techniques for the cellular phone relation criminal evidence collection of data of existing the mobile forensic engineering research is necessary in about Smart Phone where it has become new techniques and WiFi etc. Convergence. It respects Smart Phone OS star forensic technique and a tool research, iPhone Apple MAC OS X and it researches galaxy S Google Android from the present paper. Smart it uses SYN methods with Phone OS star forensic techniques and it researches in order mobile forensic description below it observes it sees and forensic application methods computer forensic methods and the tools and it researches forensic techniques. The present paper research as IT powerful country will contribute in Smart Phone forensic technical advances of Korea.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1249-1251
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• 2012

다양한 유저들이 이용하는 스마트폰의 애플리케이션 내에서 데이터베이스를 활용하여 애플리케이션 사용 중에 기록해야할 데이터를 효율적으로 관리한다면 사용자에게 더 개선된 서비스를 제공할 수 있다. Sqlite 데이터베이스는 이러한 작은 단위의 애플리케이션 내에서 효율적으로 데이터를 관리할 수 있는 데이터베이스 시스템이다.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06b
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• pp.116-119
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• 2011

스마트폰은 기존의 휴대전화보다 더 향상된 컴퓨팅 능력을 제공하는 휴대전화로, 사용자가 자유롭게 애플리케이션을 설치하여 사용할 수 있다. 스마트폰 애플리케이션은 기존의 PC 애플리케이션과 달리 하드웨어 센서와 사용자 정보를 사용할 수 있으며, 기존과 다른 사용자 인터페이스 컴포넌트를 사용한다. 이와 같은 스마트폰 애플리케이션의 특성은 설계에 반드시 반영되어야 한다. UML은 소프트웨어 모델링 언어로, 다양한 도메인을 모델링할 수 있지만, 특정 도메인의 특성을 상세히 표현할 수 없다. 이러한 이유로 UML은 확장 메커니즘을 제공하고 있다. 본 논문은 확장 메커니즘을 이용하여 iOS 애플리케이션의 특성을 충분히 표현할 수 있도록 UML을 확장하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.05a
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• pp.714-717
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• 2013

스마트폰의 대중화로 현재 앱스토어에는 다양한 어플리케이션들이 나오고 있다. 이와 같이 급속하게 발전하는 시대임에도 불구하고 모바일디바이스에서 웹페이지 또는 어플리케이션 으로 확인 할 수 있는 표준정보의 부재가 심각하다. 본 논문에서는 확인하기도 힘들고 활용하기도 어려운 기술표준 관련 정보를 공공안내그림표지 OpenAPI를 활용하여 보다 쉽게 이용 가능한 iOS 기반 스마트폰 어플리케이션을 설계 및 구현한다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2013.10a
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• pp.627-628
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• 2013

Recently, many people interested in health care moreover, smart devices have been used widly areas. Hence there are many application for smartphone. In this paper, we will introduce some of applications which related with healthcare. We will introduce our application that caluate calory to consume using motion recognition using various smartphone sensors.

• Journal of the Korea Society of Computer and Information
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• v.16 no.11
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• pp.113-122
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• 2011

In this paper, we propose an iPhone application that allows the user to pay for donations using the camera, GPS and call functions of the iPhone. As iOS version 3.0 allows the iPhone camera to detect and read bar codes and QR codes, the proposed application uses such codes to identify a product the user wishes to donation. After determining the user's location using the iPhone GPS function, the application can then perform a navigation task that guides the user to a suitable shop or store where the user can make his or her donation. In addition, the application offers an ARS call function that allows the user to make a direct donation, even if the user does not know the telephone number for making such donations. Therefore, the proposed application provides an easy means for the user to pay for donations directly or indirectly.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.5
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• pp.1231-1236
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• 2014

Recently, diffusion and proliferation of mobile devices increases, per person n opens for the mobile device era. Mobile devices and OS types of continuously growing trend. More than 80% of market share with Google's Android and Apple's iOS as well as Samsung and Intel is developing TIZEN, Linux and Mobile was the UBUNTU which UBUNTU for Phone, UBUNTU touch, Mozilla 's Firefox OS, Microsoft 's windows mobile and many more OS are ahead of the launch. But different OS can share files between systems or technology is not. Bluetooth or WIFI Direct such technologies are present but can be transferred between compatible devices low, resulting in constraints file types also exist. In this paper, is equipped with a WiFi card in an environment where the Android mobile OS party this model and method for sharing files between different research and can share the file system based on research on.

• Journal of Digital Convergence
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• v.12 no.9
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• pp.93-99
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• 2014

This study aims to explore and analyze smartphone users' characteristics from the two perspectives (purchase vs. use characteristics) on the two operating systems (iOS and Android). The results of the study on purchase characteristics show that smartphones choice priority and the gender ratio are found to be significantly different between the two operating system users. However, the replacement cycle is not statistically different from iOS and Android users. The results of study on use characteristics show that the number of the applications and the registered SNS(social network service), the average monthly smartphone bill, and satisfaction are significantly different between iOS and Android users. However, the average Internet usage time is not different between the two operating system users. The findings provide useful implications for operating developers, smartphone manufacturers, and application developers.