• Title/Summary/Keyword: secure operating system

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Performance Improvements through Policy Reorganization in SELinux (SELinux의 정책 재구성을 통한 성능 개선)

  • Ko, Jae-Yong;Choi, Jeong-In;Cho, Kyung-Yeon;Lee, Cheol-Hoon
    • The Journal of the Korea Contents Association
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    • v.17 no.4
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    • pp.307-319
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    • 2017
  • SELinux is known as a secure operating system that is easily accessible to users due to the popularization of Linux, and is applied to various security operating system references deployed on systems such as embedded systems and servers. However, if SELinux is applied without considering the performance overhead of activating the SELinux kernel module, the performance of the entire system may be degraded. In this paper, we describe the factors directly affecting the performance inside the SELinux kernel and show that it is possible to improve performance by simply reorganizing the policy without changing the SELinux kernel. This can be used as a reference when security administrators or developers apply SELinux.

Running safety analysis of tilting vehicle when speed-up limited speed 40 km/h in curved track (곡선선로에서 제한속도를 40 km/h 증속 운행시 틸팅차량의 주행안전성 분석)

  • Ham, Young-Sam;Seo, Jung-Won;Lee, Dong-Hyong;Kwon, Seok-Jin;Kim, Jae-Chul;Lee, Chan-Woo
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.1587-1591
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    • 2009
  • Safety of railroad is result of reliability which is received from test & evaluation of system. Railroad system is consisted of various sub system such as vehicle, supply of electric power, signal, communication, rail track construction, operation. To secure safety of railroad, evaluation about parts, assembly, sub system, whole system etc.. that compose railroad is essential. In this paper, I wish to describe for results that analyze korean tilting vehicle's derailment coefficient developed by national research achievement. Result that evaluation korean tilting vehicle's running safety, verified that secure even if speed-up 30 km/h than operating speed of present in curved track.

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Measurement & analysis of derailment coefficient for korean tilting vehicle (한국형 틸팅차량의 탈선계수 측정 및 분석)

  • Ham, Young-Sam;Seo, Jung-Won;Lee, Dong-Hyong;Kwon, Seok-Jin;Kim, Jae-Chul;Lee, Chan-Woo
    • Proceedings of the KSR Conference
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    • 2008.11b
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    • pp.1628-1633
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    • 2008
  • Safety of railroad is result of reliability which is received from test & evaluation of system. Railroad system is consisted of various sub system such as vehicle, supply of electric power, signal, communication, rail track construction, operation. To secure safety of railroad, evaluation about parts, assembly, sub system, whole system etc.. that compose railroad is essential. In this paper, I wish to describe for results that analyze korean tilting vehicle's derailment coefficient developed by national research achievement. Result that evaluation korean tilting vehicle's running safety, verified that secure even if speed-up 30 km/h than operating speed of present in curved line.

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Implementation and Performance Analysis of Partition-based Secure Real-Time Operating System (파티션 기반 보안 실시간 운영체제의 구현 및 성능 분석)

  • Kyungdeok Seo;Woojin Lee;Byeongmin Chae;Hoonkyu Kim;Sanghoon Lee
    • Convergence Security Journal
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    • v.22 no.1
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    • pp.99-111
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    • 2022
  • With current battlefield environment relying heavily on Network Centric Warfare(NCW), existing weaponary systems are evolving into a new concept that converges IT technology. Majority of the weaponary systems are implemented with numerous embedded softwares which makes such softwares a key factor influencing the performance of such systems. Furthermore, due to the advancements in both IoT technoogies and embedded softwares cyber threats are targeting various embedded systems as their scope of application expands in the real world. Weaponary systems have been developed in various forms from single systems to interlocking networks. hence, system level cyber security is more favorable compared to application level cyber security. In this paper, a secure real-time operating system has been designed, implemented and measured to protect embedded softwares used in weaponary systems from unknown cyber threats at the operating system level.

A Study on Introduction Method of Passenger Ship Public Operating System (여객선 공영제 도입 방안에 대한 연구)

  • Shin, Hae Mi;Noh, Chang Kyun
    • Proceedings of the Korean Institute of Navigation and Port Research Conference
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    • 2014.10a
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    • pp.167-168
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    • 2014
  • It is difficult to expect the service improvements such as increased number of sailing and making new ship due to financial difficulty this is caused by deterioration of island dwellers. In addition, the safety of ship operation is also a problem with the supply of good sailors difficult problem of low wages and lack of safety working environment. T It is necessary to ensure the introduction of public operating system in coastal passenger shipping business to secure the public and safety. There are many practical constraints but if we obtain public sea ways, it will be possible to improve the operating system through the implementation from a subsidized line and taking off business licenses of an insolvent enterprise by enhancing safety control.

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A Study on The Aviation Incident Reporting System (항공 준사고보고 제도에 관한 고찰)

  • Kang, H.C.;Choi, Y.K.
    • Journal of the Korean Society for Aviation and Aeronautics
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    • v.9 no.2
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    • pp.23-36
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    • 2001
  • The effort to secure the aviation safety in each country of the world including our country, is one step more strengthening. For one of this effort, some advanced countries in aviation safety are operating the aviation incident reporting system, and in our country the aviation incident reporting system; Korea confidential incident reporting system is operated on Jan. 1. 2000. This article is introducing for those theoretical, politics and operational backgrounds of the aviation incident reporting system, foreign countries aviation incident reporting systems and our aviation incident reporting system including those status of reporting, and analysis.

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Study for Influence of grid-connected PV System on The Distribution System. (계통연계형 태양광발전시스템의 배전계통에 미치는 영향)

  • 정영석;강기환;유권종;송진수
    • Proceedings of the KIPE Conference
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    • 1998.07a
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    • pp.100-102
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    • 1998
  • In recent years, for the viewpoint of environment and electric power demand for stable secure, new energy such as photovoltaic system (PV) become increasingly popular. In case of interconnecting PV to the commercial electric company, two problems will occur when operating in isclation with the other general consumers. One is doing harm to the power quality. And the other is the security problem caused by charching a part of commercial system line that has to be no voltage. In this paper, a simple modelling of distribution system and grid-connected PV system and simulation result were proposed.

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Development of Cleaning Module and Operating System of Underwater Robot for Ship Hull Cleaning (선저 청소용 수중로봇의 청소 모듈 및 제어 시스템 개발)

  • Choi, Hyeung-Sik;Kwon, Kyoung-Youb;Chung, Koo-Rack;Seo, Joo-No;Kang, Hyung-Suk
    • Journal of Advanced Marine Engineering and Technology
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    • v.33 no.4
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    • pp.553-561
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    • 2009
  • This paper presents development of ROV-type underwater robot capable of cleaning ship hull in automatic mode. The purpose of developing this robot is for underwater cleaning to secure the safety of divers who inspect and clean the ship hull. The robot consists of the cleaning system with rotating brush mechanism, a car-like driving mechanism, inspection system using video, and overall control system for underwater communication and operation. In this paper, we present overall design process of the cleaning system and operating system and technical contents of the overall control system for the underwater cleaning robot.

CIM and OPC-UA based Integrated Platform Development for ensuring Interoperability

  • Kim, Jun-Sung;Park, Hee-Jeong;Choi, Seung-Hwan
    • KEPCO Journal on Electric Power and Energy
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    • v.2 no.2
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    • pp.233-244
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    • 2016
  • Smart grid is called it as a system of systems. There are diverse types of systems in smart grid environment. Therefore, one of key factors to achieve smart grid successfully is interoperability among diverse systems. To secure interoperability, smart grid operating system should be developed complied with standards in terms of the data representation and communication. Common Information Model (CIM) and OLE Process for Control - Unified Architecture (OPC-UA) are the representative international standards in smart grid domain. Each standard defines data representation and communication by providing common information model and the unified architecture. In this paper, we explain a smart grid platform that we have developed to comply with CIM and OPC-UA standards for secure interoperability among numerous legacy systems.

The optimization of suspension system for high performance of Korean Tilling Train (한국형 틸팅 열차의 성능 향상을 위한 현가장치 최적화)

  • Lee, Su-In;Park, Tae-Won;Yoon, Ji-Won
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.1224-1228
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    • 2009
  • The korean tilting train can increase the whole operating speed at a curved railroad, reducing the lateral acceleration with the tilting mechanism unlike the train developed before. However, increasing operating speed on the curved section, may cause safety problem of train travel. In general, a suspension system has important effects on driving safety. Therefore, optimization of suspension system is necessary to secure the safety of the tilting train. In this study, the tilting train suspension system has been optimized using Design of Experiments (DOE). First, the design parameter is selected using sensitivity analysis. A lateral acceleration which affects on the driving safety is chosen as the objective function. And the Design of Experiments (DOE) is used for optimization. As a result, new design parameters which show better performance than the existing suspension system has been suggested.

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