• Proceedings of the Korea Institute of Fire Science and Engineering Conference
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• 2008.04a
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• pp.117-119
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• 2008

It is very important to protect life, property at sea from any fire. Recommendation on improved fire test procedures for surface flammability of bulkhead, ceiling and deck finish materials specifies a procedure for measuring fire characterizing their flammability and thus their suitability for use in marine construction. In this paper, we investigated the positive expected by fire test procedures for flammability of bulkhead, ceiling and deck finish materials. Also, unusual materials were analyzed. Finally, we suggest methods to solve several problems related to unusual materials.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.39 no.4
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• pp.378-384
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• 2011

During the flight test of KSLV-I, various sensors are installed in the launch pad and the flame deflector to measure the flame characteristics and their influences on the launch complex when a launch vehicle lifts off. Parameter Measurement System is responsible for acquiring the above flight test data. The measurement methodology such as the configuration of measurement system, sensor locations and data acquisition procedures are presented. And this paper compares and explains the characteristics of data sets measured during two flight tests.

• KOREAN POULTRY JOURNAL
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• v.39 no.1 s.447
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• pp.94-96
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• 2007

본고에서는 AI 종식이후 농가들이 재입식 절차요령에 대한 궁금증을 풀어주고자「가축질병 위기대응 실무메뉴얼」에 실린 사후관리와 재입식 요령을 바탕으로 정리하여 게재하였다. HPAI가 발생한 위험지역 내에서 다시 재입식을 하기 위해서는 최소한 3개월 정도가 소요된다. 즉, AI의 최대 잠복기가 3주이기 때문에 그동안 추가 발생이 없으면 위험지역은 경계지역으로 전환되고, 이후 1달간의 상황을 지켜본 후 이상이 없으면 이동제한 조치가 추가로 해제된다. 이동제한 조치가 풀렸다고 해서 AI발생지역에서 재입식이 가능한 것은 아니다. 이동제한 조치가 풀린뒤 21일간의 입식시험을 거쳐야 하고 시험사육뒤 검역원에 21일간의 정밀검사를 받은 후에 비로소 입식을 할 수 있다. 이 모든 것은 추가 발생이 되지 않는다는 전제하에 이루어진다.

• KOREAN POULTRY JOURNAL
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• v.40 no.6 s.464
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• pp.101-103
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• 2008

본고에서는 AI 종식이후 농가들이 재입식 절차요령에 대한 궁금증을 풀어주고자 "가축질병 위기대응 실무메뉴얼" 에 실린 사후관리와 재입식 요령을 바탕으로 정리하여 게재하였다. HPAI가 발생한 위험지역 내에서 다시 재입식을 하기 위해서는 최소한 3개월 정도가 소요된다. 즉, AI의 최대 잠복기가 3주이기 때문에 최종 살처분이 이루어진 이후 추가 발생이 없으면 3주후에 위험지역은 경계지역으로 전환되고, 이후 1달간의 상황을 지켜본 후 이상이 없으면 이동제한 조치가 추가로 해제된다. 이동제한 조치가 풀렸다고 해서 AI발생지역에서 재입식이 가능한 것은 아니다. 이동제한 조치가 풀린뒤 21일간의 입식시험을 거쳐야 하고 시험사육뒤 검역원에 21일간의 정밀검사를 받은 후에 비로소 입식을 할 수 있다. 이 모든 것은 추가 발생이 되지 않는다는 전제에 이루어진다. 따라서 지난 5월 12일 경남 양산지역에서 마지막 발생되었으므로 3km이내 가금산물을 모두 폐기처리 한 5월 22일부터 최소 3개월이 흐른 8월 20일 경에야 비로소 입식을 할 수 있을 전망이다. AI 청정화도 이 시기 전후에 이루어질 것으로 보인다.

• Proceedings of the Korean Nuclear Society Conference
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• 1997.05b
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• pp.415-420
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• 1997

하나로 재료 조사시험용 표준형 계장캡슐 개발의 일환으로 캡슐 mock-up (96M-01K)을 제작하여 노외에서 승온 성능실험을 수행함으로써, 실제 하나로내 장입시의 거동 및 안전성을 평가하고자 하였다. 본 실험을 통하여 표준형 계장캡슐의 설계/제작기술, 열적조절성능, 그리고 열설계용 컴퓨터 code (GENGTC) 둥을 평가할 수 있었다. 캡슐의 진공 및 micro-heater system은 만족할만한 성능을 보였으며, 캡슐의 공기중 승은거동은 계산치와 약간의 차이는 있으나, 이는 가공/조립상의 내부 gap 변화, 캡슐표면에서의 온도측정상의 오류, 그리고 상하부로의 열손실 등에 기인하는 것으로 추정된다. 본 실험을 통하여 표준형 계장캡슐의 하나로내 건전성을 추정할 수 있었으며, 향후 하나로 장입시의 승온 및 하강절차 등을 설정할 수 있었다. 현재 본 실험 결과들을 토대로 하나로 조사시험공의 (CT, IR1, IR2) 핵적특성 평가용 표준형 계장캡슐을 (97M-01K) 설계ㆍ제작 중이다.

• Science of Emotion and Sensibility
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• v.14 no.2
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• pp.191-196
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• 2011

Fabric extraction force measured through nozzle tester reflects a comprehensive fabric handle. Nozzle tester takes advantage of low cost, and simple and fast operating procedure compared with KES system. The paper is to develop the semi-emprical equation for assessment of the fabric handle measured with nozzle tester on the basis of friction law. The variables considered in the equation arc fabric's frictional coefficient and drape coefficient which is determined in terms of fabric bending length and shear strain. The experiment of 12 different cotton and polyester fabrics and comparisons between experimental and theoretical results were conducted. Fabrics of high frictional coefficients, high bending length, and low shear strain showed high fabric handle forces (low handle values). The handle forces predicted from the equation agreed well with those measured, which indicates that the equation can be used to objectively evaluate fabric handle with respect to fabric's own properties and also provide an information for fabric design to improve the handle performance.

• Journal of Platform Technology
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• v.8 no.4
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• pp.47-58
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• 2020

DO-330 Software Tool Qualification Considerations is a guideline for development of tools used to develop/verify software and hardware installed on aircraft. And among several processes, the verification process is very crucial as it occupies a large proportion for DO-330. Especially, in order to qualify tool with high safety level, test objectives must be performed with independence, accordingly, more time, cost, and manpower are required than other objectives. In addition, even if the test cases or test procedures are well defined, the higher the complexity of the test the higher probability of human error occurs. In this paper, we propose Script-based Test Automation Agent software structure for efficient DO-330 verification process of A661UAGEN tool developed by Hanwha Systems. Compared to the test performed manually by the test engineer, testing time of the Script-based Test Automation Agent is reduced by 87.5% and testing productivity is increased by 43.75%.

• Journal of the Korean Applied Science and Technology
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• v.35 no.4
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• pp.1108-1119
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• 2018

As the interest on the air pollution is gradually rising at home and abroad, automotive and fuel researchers have been studied on the exhaust and greenhouse gas emission reduction from vehicles through a lot of approaches, which consist of new engine design, innovative after-treatment systems, using clean (eco-friendly alternative) fuels and fuel quality improvement. This research has brought forward two main issues : exhaust emissions (regulated and non-regulated emissions, PM particle matter) and greenhouse gases of vehicle. Exhaust emissions and greenhouse gases of automotive had many problem such as the cause of ambient pollution, health effects. In order to reduce these emissions, many countries are regulating new exhaust gas test modes. Worldwide harmonized light-duty vehicle test procedure (WLTP) for emission certification has been developed in WP.29 forum in UNECE since 2007. This test procedure was applied to domestic light duty diesel vehicles at the same time as Europe. The air pollutant emissions from light-duty vehicles are regulated by the weight per distance, which the driving cycles can affect the results. Exhaust emissions of vehicle varies substantially based on climate conditions, and driving habits. Extreme outside temperatures tend to increasing the emissions, because more fuel must be used to heat or cool the cabin. Also, high driving speeds increases the emissions because of the energy required to overcome increased drag. Compared with gradual vehicle acceleration, rapid vehicle acceleration increases the emissions. Additional devices (air-conditioner and heater) and road inclines also increases the emissions. In this study, three light-duty vehicles were tested with WLTP, NEDC, and FTP-75, which are used to regulate the emissions of light-duty vehicles, and how much emissions can be affected by different driving cycles. The emissions gas have not shown statistically meaningful difference. The maximum emission gas have been found in low speed phase of WLTP which is mainly caused by cooled engine conditions. The amount of emission gas in cooled engine condition is much different as test vehicles. It means different technical solution requires in this aspect to cope with WLTP driving cycle.

• Journal of the Korean Institute of Gas
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• v.4 no.1 s.9
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• pp.9-15
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• 2000

In order to investigate the structural defects of a cylindrical-type toluene storage tank, we carried out the acoustic emissions. The storage tank was manufactured with high strength steel in 1978 and its's first and second courses from bottom were entirely repaired, recently. Acoustic emissions were monitored with real time according to load sequences in the $75{\~}84\%$ level range of maximum allowable load. Our results show a non-genuine acoustic emissions as well as a genuine characteristics. The pseudo emissions considered as valve noises were transiently occurred on shut-off processes of inlet valve regardless of water loading. The acoustic emission events occurred during water filling phase were estimated due to defects, and in the $75{\~}84\%$ test load level no evidences of defect growth were observed. Those defects were ascertained as weld cracks and porosities through the post radiography testing conducted near active sensors.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.7
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• pp.567-575
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• 2014

This paper suggests an installation procedure of a smart skin prototype into an aircraft, flight demonstration test procedures and test results. Four communication and navigation antennas are embedded into one Conformal Load-bearing Antenna Structure(CLAS). Log periodic patch type antenna was designed as a multi-band antenna to cover four antenna frequency bands. The requirements of CLAS were verified by ground tests before aircraft installation. A CLAS speed-brake was installed into KT-1 aircraft and performances of dual antennas were verified as multi-antenna tests on the ground. Electromagnetic compatibility tests were conducted to check compatibility between the CLAS and all existing equipments. Flight demonstration tests were conducted by one sortie of flight test for one antenna. The activeness and continuity of communication and navigation signal during the flight, null area of antenna signal along the circling flight were monitored. The embedded antennas worked better than expected during four sorties of flight tests.