• Journal of Aerospace System Engineering
• /
• v.10 no.1
• /
• pp.103-110
• /
• 2016

This study shows the statistical properties of the domestic composite material prepregs test result. During the last three years(2012.5~2015.6) the prepreg specimen tests have been performed by referring to NCAMP developed test procedure which was approved by FAA. The database of (1) Carbon Tape, (2) Glass Fabric, and (3) Carbon Fabric composite material prepregs' characteristics have been established for certified aircraft structures. This qualified materials can be used for aircraft structural design through proper material equivalency procedures.

• Journal of KSNVE
• /
• v.8 no.4
• /
• pp.690-699
• /
• 1998

This paper discusses the techniques, procedures and the results of the ground vibration test(GVT) performed on the development aircraft and the simple procedure of FE model updating technique from the GVT results. The GVT was carried out using random excitation technique with MIMO(Multi-Input-Multi-Output) data acquistion method, and taking full advantage of poly-reference global parameter estimation technique to identify the vibration modes. In dynamic FE modeling, the aircraft was represented by beam elements and all dynamic analysis was performed using MSC/NASTRAN for this model. In updating procedure, the stiffness of the beam model was adjusted iteratively so as to get the natural frequencies and mode shapes close to the GVT results.

• Journal of Technologic Dentistry
• /
• v.25 no.1
• /
• pp.71-79
• /
• 2003

The purpose of this study was to investigate bond strength of denture base resin repaired according to contamination. One commercial denture base resin and two different kinds of relines resin were tested; Lusiton 199(denture base resin), Vertex(reline resin) and TokusoRebase(repair resin). The specimens were processed according to the manufacturer's instructions to cured denture base resin(polymethylmethacrylate; PMMA) and reline resin. Bond strengths were examined by use of a three-point transverse flexural strength test. Data were analyzed with two-factor analysis of variance and Duncan's post-hoc test at $\alpha$=0.05. Generally, the bondstrength of heat-cured resin(Lusiton 199) was higher than the other resins. The contaminations produced an decrease in bond strength. Therefore the contamination, such as saliva or water must be avoided during the laboratory repair procedures.

• Journal of The Korea Institute of Healthcare Architecture
• /
• v.13 no.1
• /
• pp.7-15
• /
• 2007

The medicine is used for diagnosis, treatment or prevention of disease and consequently has an important influence upon human life and health. Its effectiveness and safety must be guaranteed. In order to achieve the facility that meets GMP, KFDA has provided standards for quality assurance of the manufacture, examination and tests of medical supplies. The result of this study were as follows : the GMP facilities are divided into work, lab/test and storage spaces, and the systematic corridor. The clean rooms are mainly installed in work and lab/test spaces, and maintain class 10,000 in average. The individual space for the procedures that requires class 100 is not provided as a separate division. Instead, they are performed in the clean bench of the laboratory.

• Proceedings of the Korean Society for Quality Management Conference
• /
• 2004.04a
• /
• pp.255-260
• /
• 2004

IEC 60300 series, the international standards on dependability management system are newly developed and introduced rapidly worldwide. In order to meet this situation, it is necessary to apply them to the Korean industries effectively. This requires for us to prepare in advance for the introduction of the certification system of IEC 60300. It includes the establishment of the infrastructure such as documentation of Korean Standards, introduction of test equipments and test manuals, recognition of the certification body and training of specialists etc. This paper addresses the first step for the Introduction of IEC 60300. It includes the necessity of introduction of the system, general requirements and procedures for the certification of the industries, sampling methods design and establishment of the dependability assurance system of the materials.

• The Korean Journal of Nuclear Medicine
• /
• v.39 no.2
• /
• pp.82-86
• /
• 2005

In myocardial perfusion scintigraphy, the results of this evalution now confront the practitioner of nuclear medicing with methodologic options. Most nuclear cardiologic studies are performed using thallium-201, Tc-99m sestamibi and Tc-99m tetrofosmin. Some part of these studies use some form of pharmacologic stress test. While tailoring each test to the individual is ideal, this may be impractical for a busy department. Accordingly, established protocols to be used for patients with similar clinical presentations will be helpful. The following review presents methodology of various imaging protocols mainly according to the guidelines of nuclear cardiology procedures in American Society of Nuclear Cardiology.

• The Korean Journal of Applied Statistics
• /
• v.4 no.1
• /
• pp.33-45
• /
• 1991

In the analysis of changepoint model the situation where single observation is taken at each time point has been considered. In an effort to extend this to the general situation, we may consider the changepoint model with more than one observation at each time point. These tests are developed without assuming any particular form for the underlying distribution, we propose the one-sided and two-sided nonparametric tests by extending the tests that have been considered in the changepoint model with single observation at each time point and obtain their asymptotic null distributions. We compare the empirical powers among the extended changepoint tests under one-sided or two-sided alternatives. We also compare the powers of the extended changepoint tests with those of the original test via the Monte Carlo simulation.

• Journal of the Korean Society of Clothing and Textiles
• /
• v.12 no.2 s.27
• /
• pp.145-158
• /
• 1988

The purpose of this study was develop a skirt pattern drafting method for pregnant women on the basis of their physical characteristics. The study procedures and results were as follows; 1. One hundred and one women who were 7,8 or 9 months pregnant were measured on 29 items. The result was computed to obtain descriptive statistics and correlation coefficients between each items. 2. Two new skirt patterns were developed based on the data analysis. 3. The sensory evaluation was applied to evaluate the new patterns for pregnant women by comparing them with the Japanese MOONHWA method skirt pattern for pregnant women. Sensory evaluation for appearance: According to the result of Mann-Whitney test among the three skills the skirt A was most satisfactory, and the next was the skirt B followed by Japanese MOONHWA method Skirt. Sensory evaluation for comfort; The result of Mann-Whitney test showed that the skirt B was comfortable, and the next was the shirt A followed by Japanese MOONHWA method skirt.

• Proceedings of the Korean Information Science Society Conference
• /
• 2006.06c
• /
• pp.241-243
• /
• 2006

소프트웨어의 재사용으로 인한 생산성 향상을 기대하면서, 컴포넌트 기반 개발(Component Based Development)에 관련한 연구가 지속적으로 이루어지고 있으며, 그 중 컴포넌트의 테스트 연구는 컴포넌트를 배포하고, 재사용하기 위해 검증하는데 기여하며 발전해 왔다. BIT(Built-In Test)와 컴포넌트 테스트를 위한 래퍼 클래스에 관한 연구가 대표적이다. 본 논문에서는 테스트 모듈의 산재를 방지하고, 유지보수성과 추적성 개선을 위해 테스트 프로세저를 모듈화하는 방안을 연구하였으며, 이를 위해 관점 지향 프로그래밍 개념을 도입하였다.

• Korean Journal of Child Studies
• /
• v.18 no.1
• /
• pp.109-123
• /
• 1997

The purpose of this study was to examine the relationships between adolescent sensation-seeking and risk behavior. This study was based on Zuckerman's model which states that the higher the sensation-seeking score, the higher the risk behavior score. The subjects were 460 third year high school adolescents in Seoul. Instruments were the Arnett Inventory on Sensation-Seeking and questionnaires on risk behavior as well as demographic variables. Statistical procedures were T-test, F-test, correlation, and heirarchical regression analysis. Sex was the only demographic variable related to sensation-seeking scores; there were differences in risk behavior score by father's education, mother's education and father's occupation; adolescent sensation-seeking and demographic variables (father's education, mother's education, and father's occupation) influenced adolescent risk behaviors.