• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.10a
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• pp.187-189
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• 2012

The embedded systems commonly equip a file system as default to keep data. This file system is mostly constructed with flash memory as the price get lower and the performance get higher. Types of the file system implemented on the flash memory are various according to types of embedded operating systems. By the way, as the embedded systems increasingly depend on the file system, a selection of the file system type of the embedded systems influences the performance of the entire system. This thesis discusses the factors to influence the performance of entire system in construction of file system and selection of the types, and discusses the research results.

• Journal of Institute of Control, Robotics and Systems
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• v.9 no.4
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• pp.340-346
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• 2003

Driven by the growth of the Internet and the increasing ubiquity of embedded computing systems, the embedded system is exploding in terms of it proliferation of products and the number of complex applications. Intelligent dedicated systems and appliances used in interface, monitoring, communications, and control applications increasingly demand the services of a sophisticated, state-of-the-art operating system. In the case of industrial controller, it is required to use a real-time operating system (RTOS) as a good building block to enable Internet connectivity. However, commercial RTOSes are increasingly less desirable due to their lack of standardization and their inability to keep pace with the rapid evolution of technology. In order to overcome these problems, we consider using embedded Linux and embedded web server. Availability of source code, reduced licensing, reliability, open source community support, as well as others, are key reasons for the use of embedded linux by embedded developers. In this paper, we develop embedded linux platform to control the industrial inverter with the Internet connecting feature. The method of web-based management is also proposed by using the embedded web server and Java applet. We show the feasibility of remote management for the commercial inverter controller with the proposed three-tier web-based remote management system.

• Proceedings of the Korean Reliability Society Conference
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• 2005.06a
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• pp.295-301
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• 2005

It is not easy to apply fault-tolerant techniques which are used in conventional computer systems successfully to the field of embedded computing system directly. In this paper, we study on the way of minimizing hardware and/or software backups for vehicle embedded computing systems. First, we group parts that constitute vehicle embedded systems and next feature subset is determined using the grouping information derived. The possibility of implementing graceful degradation capability in vehicle embedded systems is verified.

• Proceedings of the Korea Information Processing Society Conference
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• 2017.11a
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• pp.1238-1240
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• 2017

본 논문에서는 현재 상용화 된 유모차들이 가지고 있는 불편함 및 예기치 못한 변수로 일어나는 사고에 대응할 수 있는 기능 등 한계점을 극복하고 보완 할 수 있는 기능들을 '스마트 자율 주행 유모차'라는 시스템을 통하여 소개한다. IR-LOCK 센서를 통하여 부모와 유모차 간 일정 거리를 유지하며 센싱 한 데이터를 BLDC 모터로 전송하여 상황에 맞는 움직임을 아두이노에서 제어하는 시스템이다. 몇 가지 예외적인 실험 상황에서는 불안정한 엑츄에이션이 있지만, 정교한 알고리즘을 통하여 최적화를 시켜간다면 완성도가 높은 제품으로 발전할 가능성이 있다. 더 나아가 이 시스템을 유모차에 제한하지 않고, 다른 분야에도 적용시킨다면 매우 기대가 되는 시스템이라고 판단된다.

• IEMEK Journal of Embedded Systems and Applications
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• v.8 no.1
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• pp.25-29
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• 2013

Recently ARM processor's processing power has been increasing rapidly as it has been applied to consumer electronics products. Because of its computing power and low power consumption, it is used to various embedded systems.( including vision processing systems.) Embedded linux that provides well-made platform and GUI is also a powerful tool for ARM based embedded systems. So short period to develop is one of major advantages to the ARM based embedded system. However, for real-time date processing applications such as an image processing system, ARM needs additional equipments such as FPGA that is suitable to parallel processing applications. In this paper, we developed an embedded system using ARM processor and FPGA. FPGA takes time consuming image preprocessing and numerical algorithms needs floating point arithmetic and user interface are implemented using the ARM processor. Overall processing speed of the system is 60 frames/sec of VGA images.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.840-841
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• 2012

This paper represent a method of next generation IT fields of embedded systems. we discuss the background why the embedded systems is the importance in the next generation IT fields. Also, we describe the hardware oriented embedded systems, the embedded hardware processor, specified processor. And we discuss the embedded system application fields, i.e. mobile phone application, STB application, telematics fields, home automation, personal digital assistant and so on.

• Journal of the Korean Society of Systems Engineering
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• v.5 no.2
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• pp.57-62
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• 2009

An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. A traditional design process of embedded systems is the development of document-centric approach, and it is difficult to develop an embedded system efficiently because communication between teams or steps is not smooth. So the Model Based Design Process are applied to the development of embedded systems. This paper will compare the Model Based Design Process and the traditional design process, and introduce example of development of vehicle device applied the Model Based Design Process.

• IEMEK Journal of Embedded Systems and Applications
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• v.4 no.4
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• pp.174-179
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• 2009

Due to digital convergence, mobile embedded systems need more functionalities and a fully fledged OS. Applications for such embedded systems are linked with many shared libraries available in the OS and access a large data set at launch time. This results in increased application launch time. In this paper, we propose two techniques for reducing the application launch time: lazy-loading and pinning. Lazy-loading defers loading shared libraries that are not used in the application at launch time, whereas pinning guarantees the residence of shared libraries and data used at launch time in the main memory.

• Journal of Korea Multimedia Society
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• v.8 no.5
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• pp.721-728
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• 2005

A virtual machine is a conceptual computer with a logical system configuration, made of software unlike physical systems made of hardware. Virtual machine technology for embedded systems is a requisite software technology for download solutions such as mobile devices, digital TVs, etc. At present, a research of virtual machines for embedded systems named EVM(Embedded Virtual Machine) is in progress. As a part of the research, we define the EFF(Executable File Format) as a file format for embedded systems. We also prove completeness of EFF by structurally mapping class file widely used to EFF.

• Proceedings of the IEEK Conference
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• 2009.05a
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• pp.243-245
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• 2009

In recent years, a development of automotive embedded systems called Intelligent Vehicle are used for control and communication with CAN protocol. But as various devices and protocols are developed for Vehicle communication and control, it becomes difficult to manage the systems that contain limitation of bandwidth and various control requirement. To solve these problems, we introduce a research of automotive embedded systems which is considered the automotive real time operating system, automotive communications, and control systems.