• Title/Summary/Keyword: Safety Performance Evaluation

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Development and Validation of Safety Performance Evaluation Scenarios of Autonomous Vehicle (자율주행 안전성 평가 시나리오 개발 및 검증)

  • Chae, Heungseok;Jeong, Yonghwan;Lee, Myungsu;Shin, Jaekon;Yi, Kyongsu
    • Journal of Auto-vehicle Safety Association
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    • v.9 no.1
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    • pp.6-12
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    • 2017
  • Regulation for the testing and operation of automated vehicles on public roadways has been recently developed all over the world. For example, the licensing standards and the evaluation technology for automated vehicles have been proposed in California, Nevada and EU. But specific safety evaluation scenarios for automated vehicles have not been proposed yet. This paper presents safety evaluation scenarios for extraordinary service permission of automated vehicles on highways. A total of seven scenarios are selected in consideration of safety priority and real traffic situation. Six scenarios are relevant with lane keeping and one scenario is relevant with lane change. All scenarios are developed based on existing ADAS evaluation scenarios and repeated simulation of automated vehicle algorithm. Safety evaluation factors as well as scenarios are developed. The safety factors are based on existing ADAS ISO requirements, ADAS safety factors and current traffic regulations. For the scenarios, a hunter vehicle is needed in addition to automated vehicle evaluated. The hunter vehicle performs multiple roles like preceding vehicle, cut-in vehicle and so on. The hunter vehicle is also automated vehicle equipped with high performance GPS, radar and Lidar. All the scenarios can be implemented by driving a lap on a KATRI ITS test track. These scenarios and safety evaluation factors are investigated via both a computer simulation and an experimental vehicle test on the test track. The experimental vehicle test was conducted with two automated vehicles, which are the evaluated vehicle and the hunter vehicle.

An evaluation scenario of safety performance for extraordinary service permission of autonomous vehicle (자율주행 자동차 임시운행 허가를 위한 안전 성능 평가 시나리오)

  • Jeong, Yonghwan;Yi, Kyongsu;Choi, In Seong;Min, Kyong Chan
    • Journal of Auto-vehicle Safety Association
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    • v.7 no.2
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    • pp.44-49
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    • 2015
  • This paper presents an evaluation scenario of safety performance for extraordinary service permission of autonomous vehicle driving on a motorway. Based on advanced driver assistance system (ADAS) which is already mass-production, an autonomous vehicle driving on motorway is tested on the public roads and also getting close to mass-production. Before the autonomous vehicle tested, the safety of autonomous driving system should be evaluated based on a proper test scenario. Prior to develop the test scenario, this paper reviews the licensing standards for an autonomous vehicle in California and Nevada, and the international regulations of each ADAS. To develop the scenario, the driving conditions of motorway are categorized into five modes and fundamental evaluation requirements of elements of autonomous driving system are derived. An evaluation scenario, which represents the real driving conditions, has been developed to assess the safety of autonomous vehicle. This scenario has validated by computer simulation using model predictive control (MPC) based autonomous driving algorithm.

Analysis on the Seismic Performance of Ceiling System in School Buildings (국내 학교시설 천장재의 내진성능 분석)

  • Park, Sung-Chul;Cho, Jin-Il;Jung, Tae-Hwan
    • The Journal of Sustainable Design and Educational Environment Research
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    • v.15 no.1
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    • pp.11-18
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    • 2016
  • The purpose of this study is to develop the evaluation model of school facilities in terms of seismic performance during safety education in the school field. This study is composed of four stages with a view to developing user oriented evaluation models that can be utilized during earthquake safety education on ceiling system. and First stage analyze the evaluation guidelines to find evaluation methods and items. Based on the items, site survey was conducted to derive the characteristics of seismic performance of domestic school buildings in terms of ceiling system. Third stage analyzes the seismic performance of ceiling system. Final stage is to derive recommendations based on the results.

Potential for Dependence on Lisdexamfetamine - In vivo and In vitro Aspects

  • Yun, Jaesuk;Lee, Kwang-Wook;Eom, Jang-Hyeon;Kim, Young-Hoon;Shin, Jisoon;Han, Kyoungmoon;Park, Hye-Kyung;Kim, Hyung Soo;Cha, Hye Jin
    • Biomolecules & Therapeutics
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    • v.25 no.6
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    • pp.659-664
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    • 2017
  • Although lisdexamfetamine is used as a recreational drug, little research exists regarding its potential for dependence or its precise mechanisms of action. This study aims to evaluate the psychoactivity and dependence profile of lisdexamfetamine using conditioned place preference and self-administration paradigms in rodents. Additionally, biochemical techniques are used to assess alterations in the dopamine levels in striatal synaptosomes following administration of lisdexamfetamine. Lisdexamfetamine increased both conditioned place preference and self-administration. Moreover, after administration of the lisdexamfetamine, dopamine levels in the striatal synaptosomes were significantly increased. Although some modifications should be made to the analytical methods, performing high performance liquid chromatography studies on synaptosomes can aid in predicting dependence liability when studying new psychoactive substances in the future. Collectively, lisdexamfetamine has potential for dependence possible via dopaminergic pathway.

Safety Performance Evaluation Scenarios of Autonomous Emergency Braking System for Cyclist Collision (자전거 탑승자 대상 자동비상제동장치의 성능평가 시나리오)

  • Kim, Taewoo;Yi, Kyongsu;Min, Kyongchan;Lee, EunDok
    • Journal of Auto-vehicle Safety Association
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    • v.9 no.1
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    • pp.19-24
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    • 2017
  • This paper present a performance evaluation scenarios to assess the safety performance of autonomous emergency braking (AEB) system for cyclist collision. To guarantee the safety performance of AEB for cyclist, AEB system should be tested in various scenarios which can be occurred in real driving condition. For this, real-traffic car-to-cyclist collision data are analyzed to classify the real traffic collision scenarios. Using this information, typical car-to-cyclist collision scenarios are selected. Also, in order to develop the detail features of these collision scenarios, several accident cases related with these scenarios are explained. Based on these information, test scenarios which can describe the car-to-cyclist collisions occurred in Korea are proposed. For practicality and feasibility of the test scenarios, proposed scenarios should be designed to assess the safety performance of AEB system effectively. For this, some test scenarios are combined or removed based on the consideration about the effectiveness of each scenario to the assessment of the performance of AEB system. To confirm that the proposed test scenarios are realistic and physically meaningful, simulation is conducted using simple AEB system in proposed test scenarios.

Developing an Evaluation Tool of RFID-based Traceability Systems

  • Kim, Jin-Baek
    • The Journal of Fisheries Business Administration
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    • v.39 no.3
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    • pp.1-23
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    • 2008
  • Recently, traceability systems are introduced as a new food safety information system. To trace food products efficiently, they must have an automatic identification capability at the individual product level. This capability can be gained through RFID technology. But there is not yet any performance evaluation tool on RFID-based traceability systems (RFID-TS). This study developed an evaluation tool of RFID-TS. To develop the tool, this study considered the objective and the components of RFID-TS as their performance constructs. According to Churchill's paradigm, the tool was established through two stages. The final evaluation tool consisted of four constructs (risk, operational benefits, IS (information system), and network) and nine sub-constructs. Among the four constructs, risk and IS were found as the most important performance constructs through regression analysis. Among the nine sub-constructs, service (which belonged to the IS construct) and economic risk (which belonged to the risk construct) were found as the most important performance sub-constructs.

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Evaluation of the Quality of Occupational Health and Safety Management Systems Based on Key Performance Indicators in Certified Organizations

  • Mohammadfam, Iraj;Kamalinia, Mojtaba;Momeni, Mansour;Golmohammadi, Rostam;Hamidi, Yadollah;Soltanian, Alireza
    • Safety and Health at Work
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    • v.8 no.2
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    • pp.156-161
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    • 2017
  • Background: Occupational Health and Safety Management Systems are becoming more widespread in organizations. Consequently, their effectiveness has become a core topic for researchers. This paper evaluates the performance of the Occupational Health and Safety Assessment Series 18001 specification in certified companies in Iran. Methods: The evaluation is based on a comparison of specific criteria and indictors related to occupational health and safety management practices in three certified and three noncertified companies. Results: Findings indicate that the performance of certified companies with respect to occupational health and safety management practices is significantly better than that of noncertified companies. Conclusion: Occupational Health and Safety Assessment Series 18001-certified companies have a better level of occupational health and safety; this supports the argument that Occupational Health and Safety Management Systems play an important strategic role in health and safety in the workplace.

Study on safety performance evaluation of stationary SOFC stack (건물용 고체산화물연료전지 스택 안전성능평가 연구)

  • Park, Tae Seong;Lee, Eun Kyung;Lee, Seung Kuk
    • Journal of Energy Engineering
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    • v.27 no.4
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    • pp.1-12
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    • 2018
  • The code and standards related to fuel cells were analyzed to derive the SOFC(Solid Oxide Fuel Cell) stack safety performance evaluation items and evaluation methode. Safety performance evluation of the SOFC stack was tested by quoting derived test items. The stack used in the test is an anode-supported type 2 Cell stack (Active surface area : 220cm) manufactured by MICO Inc, and SOFC stack safety performance evaluation system used for the test is self-manufactured. We conducted a leakage test, current voltage characteristic test, rated output test, and power response characteristics test. In the safety performance evaluation test, the stack showed no gas leakage, the maximum output and rated output was recorded to 65.6 W(1.41 V, 46.5 A, $422mA/cm^2$), 62.3 W(1.57 V, 40 A, $363mA/cm^2$). In the power response characteristics test verified that the output is kept stable within two seconds. At the maximum load (40 A) and the minimum load (8 A), the output was recorded 62 W and 16W in $750^{\circ}C$. This study will contribute to the universalization and to provide much safe environment of operating the solid oxide fuel cell system.

Consideration on the Performance Evaluation Criteria & Test Data Analysis for the Roadside Safety Facilities (차량방호안전시설 성능평가기준 및 시험데이터 분석에 관한 고찰)

  • Lee, Changseok;Kim, Changhyun;Suk, Jusik;Kang, Byungdo
    • Journal of Auto-vehicle Safety Association
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    • v.6 no.2
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    • pp.55-60
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    • 2014
  • To verify the performance of roadside safety facilities, strength and occupant protection test are performed by evaluation criteria. Strength test use a truck and occupant protection test use a sedan. Strength perfomance is analyzed pass rate by post lateral resistance of the safety barrier. Occupant protection performance is analyzed from THIV(Theoretical Head Impact Velocity) and PHD(Post-impact Head Deceleration) by crash cushion test.