• 정보처리학회논문지D
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• 제17D권2호
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• pp.147-156
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• 2010

임베디드 소프트웨어의 적합성 테스트는 소프트웨어의 기능이 명세를 따라 정확히 구현되었는지 검사하는 것이다. 적합성 테스트에서 테스트 시나리오는 소프트웨어의 전체 기능을 테스트할 수 있도록 추출되어야 한다. 일반적으로 테스트 시나리오는 단순히 전체의 기능들을 한 번씩 테스트해 보는데 초점이 맞춰져 있다. 하지만 테스트 시나리오는 테스트 수행의 효율성을 고려할 필요가 있다. 이 연구에서는 각 함수들을 테스트하는데 걸리는 시간과 사용자 입력으로 인해 발생하는 대기 시간을 고려하여 최적화된 테스트 시나리오를 추출하는 기법을 제안한다. 테스트 시나리오를 추출하기 위해 상태 머신 다이어그램과 테스트 케이스를 바탕으로 그래프 형태의 테스트 모델을 생성한다. 테스트 모델에는 테스트 수행 시간과 사용자 입력에 대한 정보가 포함되어 있다. 최적화된 테스트 시나리오는 테스트 모델을 기반으로 수정된 최단거리 알고리즘을 이용하여 추출한다. 제안하는 테스트 시나리오 작성 기법을 이용하면 테스트 수행 시간을 줄일 수 있고, 테스트 자동화를 향상시킬 수 있다.

• 자동차안전학회지
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• 제7권2호
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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.

• 자동차안전학회지
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• 제11권1호
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• pp.7-16
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• 2019

There are trying to reduce damage from automobile accident in many countries. In many automobile companies, there have been active study on development of ADAS (Advanced Driver Assistance Systems) for commercialization, in order to reduce damage from automobile accident. ADAS is the system providing convenience and safeness for drivers. Generally, ADAS is composed of ACC (Adaptive Cruise Control), LKAS (Lane Keeping Assist System), and AEB (Autonomous Emergency Braking). AEB of the ADAS, it is an autonomous emergency braking system and it senses potential collide and avoids or degrades it. Therefore AEB plays a significant role in reducing automobile accident rate. However, AEB safety evaluation method is not established not yet. For this reason, this study suggests safety evaluation scenarios with adding cut-in, sensor malfunctioning scenario that scenario domestic street conditions considered as well as original standard AEB scenario of Euro NCAP for establishment of safety evaluation method of AEB. And verifying validity of suggested scenario by comparing the calculated values of the theoretical formulas presented in the previous study with results of the actual vehicle test.

• 한국신뢰성학회지:신뢰성응용연구
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• 제15권2호
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• pp.84-89
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• 2015

Accelerated life tests are widely used to evaluate the product reliability within a resonable amount of time and cost. This article provides literature review about accelerated life test plans between 2006~2015. The literature on planning accelerated life tests are reviewed with respect to the test scenario, assumed accelerated model and estimation method and optimization criteria. Finally, recommendations for the future research are presented.

• 대한임베디드공학회논문지
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• 제19권2호
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• pp.115-121
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• 2024

Each ADS must have a validation and evaluation scenario for ODD. This requires a large number of scenarios, so a scenario library must be developed. In order to effectively utilize the scenario library, a system that supports testing in the ODD of the user's choice is required. In other words, in order to develop a scenario library, it is necessary to build a database on actual driving road conditions (geometry, etc.). Accordingly, in this study, we establish a domestic driving environment database based on HD-Map for driving safety testing, design a system that can search test target sections in connection with the ODD of the scenario, and present the implementation results. In the future, it is expected that the domestic driving environment database will be able to create scenarios through linking with the scenario library and directly utilize them for scenario-based evaluation of various demand sources.

• 융합정보논문지
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• 제11권2호
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• pp.57-63
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• 2021

본 연구는 배뇨곤란 환자 사례기반 교육이 간호 대학생의 단순도뇨 지식, 단순도뇨 자신감 및 단순도뇨 술기능력에 미치는 효과를 확인하기 위한 연구이다. 본 연구의 자료는 2019년 5월에서 6월까지 수집하였으며 J시내에 위치한 간호대학생 3학년을 대상으로 수행되었다. 간호 대학생 75명을 실험군 37명과 대조군 38명으로 구성하였다. 수집된 자료는 ��2-test, independent t-test와 paired-test를 통해 분석하였다. 분석결과 단순도뇨 자신감(t=4.60, p<.001)과 단순도뇨 술기능력(t=3.46, p=.001)에서 유의한 효과가 있는 것으로 나타났다. 하지만 사례기반 교육이 간호대학생의 단순도뇨 지식에서는 유의하지 못한 것으로 나타났다. 배뇨곤란 사례기반 교육은 단순도뇨 자신감, 단순도뇨 술기능력 향상에 효과적인 교육 중재로 사용될 수 있을 것이지만 단순도뇨 지식에서는 추가적인 연구를 통하여 교육의 효과에 대한 검증이 필요할 것이다.

• 한국안전학회지
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• 제24권3호
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• pp.79-87
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• 2009

The objective of this study is to develop accident scenario models for the risk assessment of railway casualty accidents. To develop these scenario models, hazardous events and hazardous factors were identified by gathering various accident reports and information. Then, the accident scenario models were built up. Each accident scenario model consists of an occurrence scenario model and a progress scenario model. The occurrence scenario refers to the occurrence process of the event before the hazardous event. The progress scenario means the progress process of the event after the hazardous event. To manage a large amount of accident/incident data and scenarios, a railway accident analysis information system was developed using railway accident scenario models. To test the feasibility of the developed scenario models, more than 800 domestic railway casualty accidents that occurred in 2004 and 2005 were investigated and quantitative and qualitative analyses were performed using the developed information system.

• Nuclear Engineering and Technology
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• 제37권2호
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• pp.191-200
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• 2005

Shaking table tests of the seismic behavior of a steel frame structure model were performed. The purpose of these tests was to estimate the effects of a near-fault ground motion and a scenario earthquake based on a probabilistic seismic hazard analysis for nuclear power plant structures. Three representative kinds of earthquake ground motions were used for the input motions: the design earthquake ground motion for the Korean nuclear power plants, the scenario earthquakes for Korean nuclear power plant sites, and the near-fault earthquake record from the Chi-Chi earthquake. The probability-based scenario earthquakes were developed for the Korean nuclear power plant sites using the PSHA data. A 4-story steel frame structure was fabricated to perform the tests. Test results showed that the high frequency ground motions of the scenario earthquake did not damage the structure at the nuclear power plant site; however, the ground motions had a serious effect on the equipment installed on the high floors of the building. This shows that the design earthquake is not conservative enough to demonstrate the actual danger to safety related nuclear power plant equipment.

• 자동차안전학회지
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• 제10권4호
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• pp.40-49
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• 2018

Currently, a lot of researches about high risk test scenarios for autonomous vehicle and advanced driver assistance systems have been carried out to evaluate driving safety. This study proposes new type of test scenario that evaluate the driving safety for autonomous vehicle by reconstructing accident database of national automotive sampling system crashworthiness data system (NASS-CDS). NASS-CDS has a lot of detailed accident data in real fields, but there is no data of accurate velocity in accident moments. So in order to propose scenario generation method from accident database, we try to reconstruct accident moment from accident sketch diagram. At the same step, we propose an accident of occurrence frequency which is based on accident codes and road shapes. The reconstruction paths from accident database are integrated into evaluation of simulation environment. Our proposed methods and processor are applied to MILS (Model In the Loop Simulation) and VILS (Vehicle In the Loop Simulation) test environments. In this paper, a reasonable method of accident reconstruction typology for autonomous vehicle evaluation of feasibility is proposed.

• ETRI Journal
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• 제33권3호
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• pp.470-473
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• 2011

In this letter, we propose blackbox and scenario-based testing of multiplayer online games as well as simple load testing. Game testing is done from outside the source code, and the access to the source code is not required to testers because the game logic is described with a game description language and virtual game map. Instead of using a subset of the main game client for the test client, only game packet protocols and the sequence of packets are analyzed for new game testing. In addition, complex and various scenarios can be tested through combining defined actions. Scenario-based testing helps testers mimic real testing environments instead of doing simple load testing and improves the productivity of game testing.