This study was carried out to standardize the material properties of roll-over protective structure (ROPS) for agricultural tractor. The material properties which were obtained from stress-strain curve, a result of tensile test stress, were used to apply to the virtual test and varied from one production lot to the other and from one manufacturer to the other. And the finite element analysis was performed on the ROPS according to the OECD code. The results show that the load-displacement curves of virtual test were approximately equal to the actual test curves. The manufacturer or lot has been shown to have little effect on the properties of the material. Therefore, it is expected that the representative values that can be used in the finite element analysis can be determined by averaging the property values.

본 논문에서는 가스건 시험에서 원충격자의 충격 감가속도 예측에 관한 전산해석적 연구를 수행하였다. 무기체계 개발에 있어서, 가스건 시험을 통한 수만 G 이상에서의 내고충격성능에 대한 검증은 필요하다. 시험품이 받는 충격 감가속도는 버드조립체의 형상, 무게, 비행 속도 등 여러 변수에 의존하기 때문에 충격 감가속도를 생성시키는 적합한 시험조건을 찾는 것은 매우 중요하다. 하지만, 시험을 통해 기본적인 데이터를 구축하는 것은 경제적인 측면에서 비효율적이기 때문에 전산해석적 기법을 확보하여야 한다. 이에 본 연구에서는 130mm 가스건 시험을 바탕으로 획득한 데이터를 기반으로 하여 Explicit 코드를 사용하는 ANSYS AUTODYN을 활용하여 전산해석을 수행하였다. 전산해석을 통해, 시간에 따른 시험품의 동적거 동현상 뿐만 아니라 전산해석결과를 시험결과와의 비교 및 분석을 함으로써 검증을 수행하였다.

AU(A plus U-shaped) composite beam was developed for reducing the story height in the residential buildings, and saving the cosrtuction cost of floor structures. Structural performance and economic feasibility of the composite beam have been sufficiently approved through the structural experiments and the analytical studies. Fire safety for the practical application of the composite beam has also been verified through the fire resistance tests and the heat transfer analyses. In this study 2-points bending tests were performed on the four specimens already tested for fire resistance to evaluate the residual bending strength of AU composite beam after fire accident. The same bending test was performed on the one fresh specimen having the same section and span of the specimens for practically comparative study.

Given the view of tests as mechanisms within a language policy framework (Shohamy, 2006), Korean proficiency tests are not only used as a way to measure language knowledge, but rather as tools to impose national ideologies about langage use and diversity. The field of Korean language testing needs to embrace sociopolitical dimensions, and engage what is going on value and consequence in test development and validation. By drawing upon a combined approach of Messick’s (1989) validity framework, Fairclough’s (2001) Critical Discourse Analysis (CDA), Bachman and Palmer’s Assessment Use Arugment (AUA), this study aims to illustrate how the practice of testing can be discursively interpreted as a multilayered phenomenon, constituted through discourse. It discussed the applicability of AUA’s two claims (decisions, consequences) to the validation of Korean language proficiency or related certification testing for immigrants with foci of value implications and consequences. The interconnectedness of test validation and CDA is modelled through the procedure of Faircough’s (2001) analytic methodology. In an effort to illustrate that language testing is discursively value-laded, this study not only offer a theoretical and methodological addition to the current inquiry of test validation, but also re-emphasize that language testing is sociopolitically driven from a discursive angle.

This study examines the domestic and international bulletproof test standards of armor and plate which are supplied to the domestic market. In addition, improvements and suggestions for the test standard were presented. Experiments were conducted to clarify the distances to the edge, the difference between ammunition makers, and the position of the impact point of the bulletproof plate, which have been discussed in the conventional bulletproof test. As a result of the study, it was confirmed that the bulletproof performance is excellent as the distance from the edge increases. Next, performance differences between ammunition makers were not found. Finally, plates should be applied to the US ESAPI test specification to provide a clear and reproducible test method.

한국어문회 한자능력검점시험 7급에 배정된 한자 150자를 漢字構形學 이론에 근거하여 분석한 결과는 아래와 같다. 150자 안에는 層次조합의 글자가 14자가 포함되어 있고, 6개 構形모델이 존재한다. 이 構形모델 안에는 構形理據가 희박한 3, 4등급의 記號字가 23자 포함되어 있다. 이는 난이도가 높은 한자가 초급단계에 배정되어 초급자의 한자학습을 어렵게 한다는 의미이다. 150자를 直接構件과 基礎構件으로 귀납하면 直接構件 총 수량은 149개이고, 基礎構件의 총수량은 141개이다. 이외에 基礎構件에는 12개의 變體構件이 존재하는데 이를 합치면 153개의 構件이 150자를 구성하고 있는 셈이다. 모든 한자의 基礎構件이 400여 개임을 감안하면 한국어문회 한자능력검정시험 7급 150자의 基礎構件 141개는 상대적으로 그 비중이 너무 높다고 할 수 있다. 뿐만 아니라 141개의 基礎構件 안에는 構件 하나로 글자를 만들 수 없는 非字構件이 28개이다. 이는 한국어문회 한자능력검정시험 7급 한자의 배정이 자형 난이도에 따른 과학적인 분석에 근거되지 않았다는 증거이다. 이러한 배정은 초급자의 한자학습에 상당한 부담으로 작용할 수 있다.

This study is aims to study the perceptions of test-takers of TOPIK by analyzing the result in a critical assesment perspective. A survey with 98 TOPIK test-takers was conducted, and in-depth interviews with 10 students were followed to delve into their emotional reactions toward the TOPIK test. The results showed that the test-takers of TOPIK considered the test as an instrument to accomplish their purpose such as entering school, continuing studies, or applying for jobs. It was found that the test-takers had suffered from mental pressure, stress when they took the test. Second, the test-takers acknowledged TOPIK to be irrelevant to evaluate practical Korean language skills which are required to stay or study in Korea. Third, most test-takers were able to access information on TOPIK through various ways, yet they recognized the ways to be insufficient and limited. Besides, the respondents expressed discomfort with the inconsiderate management system and environment of the test in particular, such as the announcement of the results, considerable distance to the test venues, and attitude of the examination supervisors. The research proposes the following suggestions to improve TOPIK. First, considering that the purpose of TOPIK is to evaluate Korean language proficiency of test-takers, the questions must be developed for assessing their authentic skills of Korean language. Second, the test environment needs to be enhanced to ensure a complete and equitable test to be conducted. Paying attention to recruiting and educating exam supervisors is also needed as well. Third, it is important to protect the test-takers’ rights over their responsibilities.