• Journal of the Korean Applied Science and Technology
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• v.41 no.2
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• pp.172-187
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• 2024

In good laboratory practice (GLP), analytical method validation prior to toxicity testing is important in terms of concentration setting and sample preparation. The testing agency performed validation of the two requested test substances using high-performance liquid chromatography (HPLC), and as a result, the analysis satisfied the criteria for specificity, system suitability, linearity, intra-day reproducibility, homogeneity, stability, concentration analysis, and quality control. The method was established and validated. However, the content of standard substances in the test report of the requesting institution was found to be 1.34 and 1.17 times higher than the results of the testing institution, confirming that deriving results through validation of analysis methods suitable for GLP is important in terms of securing reliability and stability.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1997.04a
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• pp.13-23
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• 1997

액체 로켓 추진기관의 개발에 가장 큰 장애요인은 연소불안정 현상이다. 연소불안정이 생기는 원인과 연소실내 음향효과에 따른 분류를 행하고 액체 로켓 추진기관 개발에서 발생하였던 연소 불안정 현상을 추진제 종류와 특성에 따라 살펴보았다. 또한 추진기관의 연소 안정성을 보장하기 위한 성능확인 시험과 연소 불안정을 억제하는 능동적, 수동적 방법에 관하여 기술하였다.

• The Monthly Technology and Standards
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• s.5
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• pp.106-107
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• 2002

• The Monthly Technology and Standards
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• s.20
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• pp.60-67
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• 2003

• The Monthly Technology and Standards
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• s.93
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• pp.35-36
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• 2009

• The Monthly Technology and Standards
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• s.17
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• pp.98-99
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• 2003

• The Korean Journal of Pesticide Science
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• v.17 no.2
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• pp.94-106
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• 2013

The proficiency testing for the residue laboratories of pesticide registration was conducted in order to improve the reliability and the ability for pesticide residue analysis. On October 2011 the testing was carried out using the soil collected and kept as the moistened state for five years, which is expected to very low residue levels of pesticides. The soil was fortified with chlorpyrifos, metolachlor and procymidone in a manner similar to prepare soil sample for indoor soil degradation test, and then sub-samples were prepared for the distribution to participants. Some of them were randomly selected for confirm of homogeneity and to ensure the stability of samples at room temperature. Samples were consisted of two soil treated as different levels, one of which was used to the assesment and another used to confirm. In addition, provide three standard solutions, respectively concentration of 10 mg/L, and untreated soil. Forty seven institutions submitted results. The medians of results were used as the assigned values for pesticide residues. Fitness for purpose standard deviation of proficiency test was calculated by applying 20% RSD as the coefficient of variation allowed in the soil residue test. Z-score was applied for evaluation of individual pesticides, and the average of the absolute value of the Z-score for the overall assessment of pesticides. Laboratories evaluated the absolute value of the Z-score less than 2 to fit the case of chlorpyrifos and procymidone were 44, metolachlor 40.

• Journal of the Korean Society of Propulsion Engineers
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• v.7 no.3
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• pp.22-29
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• 2003

The propulsion feeding system of KSR-III is composed of tubes, valves and PSC, and controls the flow of propellant entering to engine. The test of PTA-I is carried out to verify the characteristic of propulsion feeding system and component. The tests of operation characteristic of component, hydraulic characteristic of tubes, flow control using venturi, oscillation of dynamic pressure, characteristic of regulator are carried out. Troubles of component are found out, and renewed, and the performance of the propulsion feeding system is verified through PTA-I. The results of PTA-I are used to the configuration of propulsion feeding system and test of PTA-II.

• Information and Communications Magazine
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• v.31 no.7
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• pp.24-31
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• 2014

TTA(한국정보통신기술협회)는 ICT분야 시험 인증과 표준화를 수행하는 공공 기관이다. 본 고에서는 소프트웨어 시험인증을 담당하고 있는 TTA소프트웨어시험인증연구소를 소개하고, 연구소에서 제공하는 다양한 시험 및 인증 서비스를 기술적인 내용과 함께 설명하고자 한다.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 2009.11a
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• pp.167-170
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• 2009

Fast cook-off test with rocket motors was performed and characteristics of the results were analyzed. The material of the motor case was carbon epoxy composite. The motor was loaded with HTPE propellants to improve the insensitive munitions characteristics. In the tests, sound pressure and heat flux sensors were used to determine the category of response according to the standard. The reaction response of all of the HTPE motors tested by fast cook-off was judged as Type V burning.