• Title/Summary/Keyword: Software Regulation

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A development of speed and precision stop controller toy ATO using servo-controller (추종 제어 기법을 응용한 ATO 속도 및 정밀정차 제어 장치 개발)

  • 박준영;김용민;이태연;박재홍;한성호;김원경;김동호;전병진
    • Proceedings of the KSR Conference
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    • 1999.05a
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    • pp.267-274
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    • 1999
  • This paper is mainly concerned with the development of the ATO(Automatic Train Operation) System. The ATO system is used for automatic or driverless operation of a train using various informations from TCMS, ATC, TWC. In this paper, the general architecture of the ATO system, implementation of ATO application software and the algorithm using servo-controller for automatic train speed restriction/regulation is presented.

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Automatic Fire Detector Spacing Calculation for Performance Based Design (성능위주설계를 위한 화재감지기배치의 공학적연구)

  • Park, Dong-Ha
    • Fire Science and Engineering
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    • v.24 no.1
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    • pp.15-23
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    • 2010
  • Placement method for fire detectors prescribed in current fire safety regulation is just about placing a prescribed number of detectors according to the areas. However, this regulation has no scientific basis and standards from foreign countries are just introduced and fire detectors are installed complying with them. There are two standards in designing fire protection systems; Prescriptive-Based Design that follows stipulated regulations like fire safety standards and Performance-Based Design based on engineering knowledge such as fire dynamics, structural dynamics, mechanics of materials, fluid mechanics, and thermo dynamics. Recently, Fire Protection System Construction Business Act was revised so that fire protection systems can be designed using Performance-Based Design method ('05. 8. 4), though the method has not activated until now. In addition, the enforcement decree defines the range for specific objects of fire protection to which Performance-Based Design is applied ('07, 1. 24). At the moment, by manufacturing simulator so that formulas can be introduced and calculated with software in order to install fire detector of automatic fire detection systems keeping optimized distance, comparing the results with the state of fire detector placed according to Performance-Based Design and analyzing them, this study was intended to settle Performance-Based Design method in the future.

Coordinated Wide-Area Regulation of Transmission System for Voltage Profile Improvement and Power Loss Reduction

  • Asadzadeh, Babak;Golshannavaz, Sajjad
    • Transactions on Electrical and Electronic Materials
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    • v.18 no.5
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    • pp.279-286
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    • 2017
  • In this paper, an optimal approach for the wide-area regulation of control devices in a transmission network is proposed. In order to realize an improved voltage profile and reduced power loss, existing devices such as tap-changing transformers, synchronous machines, and capacitor banks should be controlled in a coordinated and on-line manner. It is well-understood that phasor measurement units in transmission substations allow the system operators to access the on-line loading and operation status of the network. Accordingly, this study proposes efficient software applications that can be employed in area operation centers. Thus, the implanted control devices can be regulated in an on-line and wide-area coordinated approach. In this process, efficient objective functions are devised for both voltage profile improvement and power loss reduction. Subsequently, sensitivity analysis is carried out to determine the best weighting factors for these objectives. Extensive numerical studies are conducted on an IEEE 14-bus test system and a real-world system named the Azarbayjan Regional Transmission Network. The obtained results are discussed in detail to highlight the promising improvements.

A Study of Risk Analysis for Underground-parking of Gas Vehicle (가스 자동차의 지하 주차 시 위험성 분석)

  • Rhie, Kwang-Won;Kim, Tae-Hun;Oh, Dong-Seok;Oh, Young-Dal;Seo, Doo-Hyoun;Shin, Soo-Il
    • Journal of the Korea Safety Management & Science
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    • v.14 no.1
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    • pp.65-73
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    • 2012
  • We studied the risk analysis of fire and explosion caused by gas leak in underground-parking of gas vehicle. However, an entrance regulation of gas vehicles (H2/LPG/CNG etc.) to underground garages has not been enacted in Korea. Incase, a gas explodes in an underground parking garage placed in overcrowded residential area, such as an apartment, the scale of the damage would cause tremendous disaster. Faults of vehicle parts and management problems were evaluated by using the Failure mode and effect analysis (FMEA), which is a qualitative analysis method. The range of the damaged area by the explosion and the damage scale by the explosion pressure were analyzed by using the process hazard analysis software tool (PHAST). The study is expected to facilitate enactment of the regulation for the underground parking to restrict the gas vehicle.

Study on the Improvement of Event Data Recorders through Accident Analysis (사고분석 사례를 통한 사고기록장치 개선방안에 대한 고찰)

  • Park, Giok;Kang, Heejin;Jun, Joonho;Kim, Heejune
    • Journal of Auto-vehicle Safety Association
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    • v.13 no.4
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    • pp.66-72
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    • 2021
  • This study was initiated to improve of the defect investigation method using event data recorders (EDR) and suggested a solution through the regulation and system analysis of EDR. The EDR data has been used for various purposes such as the vehicle defect investigation and the traffic accident investigation. However the EDR regulation has not been updated since the implementation in 2012. "Trigger Threshold" can be used to analyze a single accident such as the frontal crash, the side crash, and the rollover. In the case of a complex accident in which a rollover accident and a crash accident occur simultaneously, it is difficult to analyze a complex accident due to current "Trigger Threshold". This study proposed the method of separating the "Trigger Threshold" into a crash accident and a rollover accident so that accidents can be analyzed using the EDR data even when a complex accident occurs. In addition, it proposed the improvement method to quickly use the data of EDR in accident reconstruction software.

Impact of Work Motivation on Satisfaction and Turnover of Public Universities Lecturers

  • PHAM, Chinh D.;HOANG, Thao P.D.;NGUYEN, Yen T.
    • The Journal of Asian Finance, Economics and Business
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    • v.8 no.2
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    • pp.1135-1146
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    • 2021
  • The paper aims to examine the relationship between various types of motivation and satisfaction as well as turnover intentions of public university lecturers. Intrinsic motivation is found to affect both satisfaction and turnover, while for extrinsic motivation, only one type has a significant effect on satisfaction. The web-based questionnaire with convenience sampling was chosen to approach target respondents. Data was collected by sending a link of the questionnaire to the lecturers' email. There were 700 questionnaires collected. Of which 681 valid responses, after screening out unusual questionnaires. In order to fulfill these aims, the authors employed structural equation modeling with maximum likelihood method supported by AMOS software with 681 valid samples. The evidence confirms the high correlation between intrinsic motivation and satisfaction for university lecturers which has been shown in previous studies. With regard to extrinsic motivation, extrinsic regulation (material) is found to have a positive influence on satisfaction, meaning financial rewards and job security will lead to his contentment while introjected regulation is a source of dissatisfaction. The results also demonstrate that intrinsic motivation is negatively correlated with turnover intentions. A person who is interested in the job itself is less likely to leave his or her job due to a keen passion for it.

A Study on Security Evaluation for Secure Software Update Management System in Automotive (안전한 자동차용 SUMS 구축을 위한 보안성 평가기준 도출)

  • Seo, Jaewan;Kwak, Jiwon;Hong, Paul;Cho, Kwangsoo;Kim, Seungjoo
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.32 no.6
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    • pp.1151-1163
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    • 2022
  • As wireless communication functions begin to be installed in vehicles, cyberattacks that exploit vulnerabilities in wireless communication functions are increasing. To respond to this, UNECE enacted the UN R156 regulation to safely distribute the software installed in the vehicle by using the wireless communication function. The regulations specify the requirements necessary to safely distribute the software for vehicles, but only the abstract requirements are presented without information on the components and detailed functions necessary to develop and implement the requirements. Therefore, in this paper, we propose a security evaluation standard that can evaluate whether a safe SUMS is built using threat modeling, a method for systematically analyzing security threats.

Development of Framework for Compliance with Vehicle Cybersecurity Regulations: Cybersecurity Requirement Finder (차량 사이버보안 법규 준수를 위한 프레임워크 개발: Cybersecurity Requirement Finder)

  • Jun hee Oh;Yun keun Song;Kyung rok Park;Hyuk Kwon;Samuel Woo
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.22 no.6
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    • pp.299-312
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    • 2023
  • Recently, the electronic control unit (ECU) has been integrating several functions into one beyond simple convenience functions. Accordingly, ECUs have more functions and external interfaces than before, and various cybersecurity problems are arising. The United Nations Economic Commission for Europe (UNECE) World Forum for Harmonization of Vehicle Regulations (WP.29) issued UN Regulation No.155 to establish international standards for vehicle cybersecurity management systems in light of the growing threats to vehicle cybersecurity. According to international standards, vehicle manufacturers are required to establish a Cybersecurity Management System (CSMS) and receive a Vehicle Type Approval (VTA). However, opinions were raised that the implementation period should be adjusted because domestic preparations for this are insufficient. Therefore, in this paper, we propose a web-based solution that maps a checklist to check the status of CSMS in the requirement and various vehicle security companies and solutions to mitigate the identified gap.

Changes and Perspects in the Regulation on Medical Device Approval Report Review, etc. : Focus on Traditional Korean Medical Devices (의료기기 허가·신고·심사 등에 관한 규정 변화와 전망 : 한의 의료기기 중심으로)

  • DaeJin Kim;Byunghee Choi;Taeyeung Kim;Sunghee Jung;Woosuk Kang
    • Journal of Society of Preventive Korean Medicine
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    • v.28 no.1
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    • pp.31-42
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    • 2024
  • Objective : In order to understand the changes in domestic approval regulations applicable to traditional Korean medical device companies, this article will explain the major amendments 「Regulation on Medical Device Approval Report Review, etc.」 from 2005 to the present on a year-by-year basis, and provide a counter plan to the recent changes in approval regulations. Methods : We analysed the changes in approval regulatory amendments related to the traditional Korean medical devices from 2005 to the present. Results : The Ministry of Food and Drug Safety is continuously improving medical device approval regulations to ensure the global competitiveness of domestic medical devices and contribute to the improvement of public health. Recent major approval regulatory amendments include the establishment of a review system for software medical devices and digital therapeutics, the recognition of real world evidence materials, the introduction of a biological evaluation of medical devices within a risk management process and a medical device approval licence renewal system. Conclusions : It is expected that the range of medical devices available to Korean medicine doctors will continue to expand in the future through the provision of non-face-to-face medical services and the development of advanced and new medical devices, as well as wearable medical devices and digital therapeutics. In order to increase the market entry potential of traditional Korean medical devices that incorporate advanced technologies such as digital technology and AI-based diagnosis and prediction technology, it is urgent that the government provide significant support to traditional Korean medical device companies to improve approval regulatory compliance.

A Performance-based Design Example of Smoke Extraction System Using CFD Fire Simulation (CFD 화재 시뮬레이션을 이용한 여객선 제연설비의 성능기반 설계 사례)

  • Lee, Jung-Moo;Kim, Sung-Hoon;Lee, Sung-Geun
    • Journal of the Society of Naval Architects of Korea
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    • v.47 no.3
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    • pp.454-461
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    • 2010
  • The new SOLAS regulation permits the alternative design approach for the approval of designs which deviate from those where prescriptive rules apply. The new approach is being promoted by recent advances of noble designs such as those employing large public spaces in passenger ships. From the respect of fire safety, it is needed to show that the level of safety of new design is equivalent to what can be achieved from the prescriptive rules where the fire simulation is regarded to be the essential tool. This paper provides an overview of the process of performance-based design of the smoke extraction system in a cafeteria of a ROPAX. FDS, a CFD fire simulation software is used to show that the field-model software can improve the fire safety over what are expected from prescriptive rule sets or zone-model application.