• Journal of Applied Reliability
• /
• v.16 no.3
• /
• pp.208-215
• /
• 2016

Purpose: ASRP for the domestic development guided missiles requires not only for the reliability evaluation of the products in storage but also for the life cycle management of the products including development prototypes and initial production items. Methods: For this purpose, it should be performed to build a performance database before and after the accelerated aging test with shelf life items including development prototypes and initial production items, based on which the lifetime prediction should also be carried out. In addition, HILS must be applied for the acceptance test with the initial and follow-up production items, and also for ASRP for the long-term storage products in order to secure systematic quality assurance. Results: The results for the life cycle reliability Improving of domestic development of guided missiles are DB building of prescription Item performance, active application of HILS, Management associated with guided missiles life cycle and to Secure technology data about the introduction of foreign guided missiles. Conclusion: Furthermore, it is demanded that DTaQ, the managing agency of ASRP, actively take part in the process to maintain reliability engagement consistency over the life cycle of guided missiles.

• Korean Journal of Environmental Biology
• /
• v.29 no.1
• /
• pp.23-30
• /
• 2011

In this study, the Comet assay (evaluation of DNA damage) used the fish hepatocellular carinoma cell, PLHC-1, was tried to the sediment extract obtained from freshwater to understand its applicability as a tool for monitoring sediment toxicity. In parallel, induced EROD (7-ethoxyresorufin- O-deethylase) activity and DNA damage (TEM values) in PLHC-1 cells were measured for establishing the tandem endpoints of the PLHC-1cell test to test the ecotoxicity of sediment. Among several study sites in a small river passed through downtown and industrial park area, one of them, site B, showed a higher level of EROD activity and DNA damage than other sites. It indicates that a tandem endpoints of PLHC-1 cells could be useful tools for assessing the toxicity of sediment. The sensitivity of Comet assay with PLHC-1 cells was a little higher than that with a blood cell of frog tadpoles to the solvent extract of sediment. According to the results, a PLHC-1 cell-Comet assay could be used as a useful tool for evaluating ecotoxicity of the freshwater sediment. In addition, more detailed studies are needed to the contaminated site.

• Child Health Nursing Research
• /
• v.8 no.3
• /
• pp.334-343
• /
• 2002

This study was aimed at primarily to develop a tool to evaluate sexuality education and secondarily to test effectiveness through application of developed evaluation tools in elementary school. The results from this study were summarized below: 1. On the basis of targeting the lower grades (1st- 3th year) and the higher grades (4th-6th year) elementary school students' sexuality education guidebooks published by Korea Ministry of Education & Human Resources Development, 71 preliminary items targeting the lower grades, 90 preliminary items targeting the higher grades were developed. 2. Through the validity test about the contents of the preliminary items three times, the items were regulated to 65 items targeting the lower grads and 57 items targeting the higher grades. And then, the preliminary items were re-regulated to 40 items separately. Then, pre-test which targeting each 30 students was enforced. 3.Finally, the evaluation tools for sexuality education that consisted of 40 items targeting the lower grades and the higher grades were developed. 4. eliability test of the developed tools, sexuality education evaluation tools showed alpha coefficient of internal consistency were 0.8355 (for the use of the lower grades) and 0.8881 (for the use of the higher grades). 5. o apply the developed sexuality education evaluation tools, 10-times sexuality education were carried out class unit and pre-post test were done using same questionnaire, which contains developed tool, there were significant difference in low grade (t=16.548, p=0.000), high grade (t=14.773, p=0.000). The results of this study suggest that the evaluation tool for sexuality education in elementary school may be a useful tool with a high degree of reliability and validity. In this sense, the evaluation tool for sexuality education developed by this study can be effectively utilized in Korea elementary schools.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.26 no.3
• /
• pp.252-261
• /
• 2023

Analysis of dynamic characteristics and flight vibration test for unmanned aerial vehicles was studied by using dummy test body. The FEM model for dummy test body was supplemented by results of modal and random vibration test. The free end boundary condition to simulate flight environments was made by test setup using bungee cable. Prior to the flight vibration test using a dual electric vibration exciters, the test procedure to calculate quantitative vibration level was studied by using military specification. The actual test was successfully done by using the analysis and pretest results. From the analysis results, it was possible to determine the feasibility of the test by predicting the excitation force of the flight vibration test and to get the response of any point which could not be measured by the test. The results of this study will much contribute to the Test and Evaluation of unmanned aerial vehicles.

• Journal of Advanced Navigation Technology
• /
• v.21 no.6
• /
• pp.549-553
• /
• 2017

The KASS development project, a Korean SBAS launched in 2014, is under development for the APV-1 Class SOL service in 2022. Flight tests should be conducted to analyze development requirements and performance requirements for KASS R & D. However, since the evaluation items have not yet been presented in Korea, FAA and ICAO regulations should be analyzed so that evaluation items for flight testing for KASS development should be structured and comply with international standards. In this paper, we analyze the procedure verification of SBAS for flight test using satellite navigation system.

• Composites Research
• /
• v.15 no.1
• /
• pp.61-69
• /
• 2002

This paper review research activities of some mechanical test methods thor advanced composites which have been conducted in Fukuda laboratory. Tokyo University of Science. The subjects are (1) innovation and development of compression bending test. (2) mechanical-property evaluation of soft-core sandwich beam, and (3) loop test to measure the strength of monofilaments.

• The Research Journal of the Costume Culture
• /
• v.15 no.2 s.67
• /
• pp.299-310
• /
• 2007

The purpose of this study was to develop wool knitted Jacket pattern suited for Middle-aged women's body shape. The usable data of first and second wearing test were coded for further statistical analysis including descriptive statistics(frequency and one way- ANOVA test, Student-Newman-Keuls Multiple Range Test) by using SPSSWIN 12.0. The results were as follows: 1. It was found that first evaluation for the appearance test on fitness, pattern B were better than the rest of them. 2. It was found that second evaluation for the test, jacket B with milano were better than the rest of them. Therefore, it should be designed as possible as considering the physical characteristics of knitted materials. 3. It was found that third evaluation for the test, it is necessary that knitted jacket follow a similar size tolerance such as a woven jacket.

• Journal of the Korea Institute of Military Science and Technology
• /
• v.22 no.2
• /
• pp.224-232
• /
• 2019

This paper presents guidelines for the verification test on electromagnetic environmental effects of a commercial derivative military aircraft. To prove the safety-of-flight of a renovated aircraft and appropriate working of electronic system/device, E3 test and analysis at the system level should be performed prior to its operations on real warfare. For the aircraft modified with Falcon 2000S, we concentrate on intra-system EMC, EMRADHAZ (Electromagnetic Radiation Hazards), electrical bonding, P-Static as test and lightning as analysis from a airworthiness certification point of view based on MIL-STD-464, MIL-HDBK-516. As a result, it is verified that the modified aircraft has enough electromagnetic compatibility capabilities under EME(Electromagnetic Environment). In the process, test and analysis methods considering shielding effectiveness(SE) are applied.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2018.10a
• /
• pp.507-511
• /
• 2018

This paper proposes a method for system development for high speed (300MHz) test of system IC semiconductors. The high-speed test system proposes a high-speed test circuit interface and a PCB design method for noise reduction. This paper proposes evaluation items and procedures for verifying the performance of the developed system. System IC The development of high speed test systems will help optimize the development of domestic system IC test equipment.

• Child Health Nursing Research
• /
• v.30 no.1
• /
• pp.45-53
• /
• 2024

Purpose: This study develops a chatbot for school violence prevention (C-SVP) among elementary school students. Methods: Among the analysis, design, development, implementation, and evaluation (ADDIE) models, ADD phases were applied to develop a C-SVP. Students' learning needs were identified by constructing content with a design that attracted their attention. Subsequently, a formative evaluation was conducted on the developed C-SVP to test its applicability by ten elementary school students targeting the 5th and 6th grades. Results: The chatbot was designed using KakaoTalk and named "School Guardian Angel." The formative evaluation revealed that the developed C-SVP was easily accessible and useful for elementary school students. Conclusion: The developed C-SVP is expected to be effective in preventing violence among elementary school students. However, further research involving children of various age groups is required.