The rancidity of soybean (Glycine max L.) in powder forms was evaluated by fluorescence spectrum test (FST). The results from the FST were validated by comparing those of 2-thiobarbituric acid (TBA) value and acid value. The storage temperature and time of soybean powders were at the room temperature, 50, and 90oC for 20 days. The maximum excitation and the maximum emission of fluorescent compounds generated from the soybean powder during storage were observed at the wave length of 360 nm and 430 to 440 nm, respectively. The mean particle size of soybean powder was controlled to be 40 μm. The FST results showed that the lipid oxidation during storage at room temperature and 50oC was not progressed actively (p < 0.05), but dramatically progressed at 90oC. All the values at room temperature and 50oC showed a similar pattern during storage. But, at 90oC, the FI (fluorescence intensity) values and the acid values showed similar pattern. The results demonstrated that FST might be useful to measure the rancidity of soybean powder because FST did not require oil extraction to measure the rancidity.

Hull forms for catamaran type small fishing boat powered by electric motor are newly developed by experimental approaches. Model tests for two hull forms having different length are made at circulating water channel. Resistance performance and wave patterns are compared to carry out an analysis of the effect of extension of main body. The results show that the extension of main body can give better resistance performance above a certain velocity.

Light emitting diode(LED) plays important role in illumination applications such as general lighting, automotive, and outdoor lights due to their high reliability and energy saving elements. The long lifetime is one of the main advantages of LED and thus, the Accelerated Life T(ALT) is used to help achieving the target life time. This paper presents the investigation of ALT models and failures for LED in recent literatures. LED reliability improvement technologies will be discussed finally.

Steering gear is the part of an automobile that change circular movement of steering wheel to lateral movement of rack to change driving direction. This can be classified with manual and power steering gear. Manual steering gear is operated only with human power while power steering gear use oil pressure support. These days power steering gear is more common to almost of the car. Recently a korean company manufactures a speed sensitive power steering which provide variable steering feel depend on the speed of car. The Broens company of Australia produces and exports the test equipments for the manufacture of power steering valves and assemblies to major vehicle manufactures. Some korean companies imported the test equipments from Australia, thus increasing the cost. The purpose of this study is development of the valve balance test equipment to measure the valve torque of the power steering gear. This study designed and manufactured the valve balance test equipment to take hold of the power steering valve using CAE analysis. In order to evaluate the performance of the developed valve balance test equipment, the R&R tests have been conducted.

This study presented a development of a phototactic chamber used for pest monitoring. The chamber was constructed by opaque acrylic body. Transparent acrylic wall of the chamber for light-exposure were fitted at both side end parts of the inside chamber. Side parts of the outside chamber were made of removable cover in combination with the air circulation system and light source such as LED or fluorescent. The insect entrance holes was positioned at the center part of the chamber to efficiently dispersed pests, and then nylon net was equipped inside the chamber to prevent the escape of inserted pests. Two opaque partition walls of the inside chamber were made of the movable plate, in order to the control of the light-exposure and the response termination. We also carried out behavioral experiment against various pest species by using the phototactic chamber. Consequently, the phototactic chamber was confirmed suitable result of behavioral experiment. Therefore, we believed that the test chamber help to understand the phototactic responses of various pests.

The perilla leaf pyralid moth, Pyrausta panopealis Walker (Lepidoptera: Pyralidae), is a serious pest damaging to leaf perilla. In order to establish the life parameters of P. panopealis for eventual purpose of control, the developmental span of each stage were investigated under five temperature regimes (20℃ ~ 3 0℃). In addition, the larvicial efficacy of several on-the-market environment-friendly agricultural materials (EFAMs) was tested. The width of head capsule at each larval stage measured to be the mean of 0.21, 0.32, 0.47, 0.64, and 0.98 mm, respectively. The larval period of P. panopealis was longest at 20ºC as 27.0 days and shortened as temperature goes up to 30ºC as 11.3 days. Survivorship of the larval P. panopealis was the highest at 30ºC as 80%, whereas that of other temperatures ranged from 40% (20ºC) to 62.5% (27.5ºC), indicating that the P. panopealis appears to favor higher temperature. In addition to larval period, the duration of egg, prepupa, and pupa stages also shortened as temperature goes up, whereas the duration of adult stage increased as temperature goes up: from 4.1 days at 20 ºC to 6.1 days at 30ºC. After the perilla leaf pyralid moths were successfully stabilized in indoor environment the larvicidal efficacy of the ten EFAMs that were previously selected from the result of other moth species was tested aimed at 4th instar larvae for 48 hrs. Seven of the ten tested showed more than 90% of mortality within 12 hrs and reached nearly up to 100% within 24 hrs, but the remaining three showed less than ~70%.

To fulfill the design requirement from the Algeria owner, Hull form development of a trawl fishing boat was performed. Model test at CWC in INHA Technical collage was carried out to investigate the resistance characteristics and CFD analysis using FLUENT was performed to examine flow patterns and pressure distribution around hull etc. The designed hull form satisfies speed-power requirement of 10.5 knots at installed power. This paper describes the design feature of trawl fishing boat and evaluates the model test results and CFD results. The design constraints for Algeria trawl fishing boat were explained and the speed of the ship was compared with sea trial results.

최근의 스마트 의류는 급변하는 환경과 테크놀로지 그리고 인간중심의 패러다임의 변화는 기술적 발전과 더불어 보다 인간 중심의 요소와 감성을 중시한 디자인을 요구하며, 기술적인 측면과 함께 보다 인간 중심의 사용성 평가를 중시하는 디자인으로 연구, 개발되고 있다. 이에 본 연구에서는 헬스케어를 위한 생체신호 측정 센서 기반 스마트 의류의 디자인 프로토 타입을 개발, 사용성 평가 및 착용성 평가를 실시하였다. 평가는 정성적, 정량적 평가로 이루어졌으며, 사용성 평가 결과를 기반으로 도출된 문제점의 수정, 보완을 통해 최종 센서기반 스마트 의류의 모형을 제시하였다.

It is well known that the test and evaluation plan (TEP) is very crucial in the successful development of safety-critical systems. As such, this paper discusses an approach to the development of the TEP for a system that should meet safety requirements in the systems development process. It is studied how to incorporate the result of preliminary hazard analysis (PHA) in generating the safety requirements. It is also discussed how to deal with them when the system requirements (i.e., functions, performance, constraints, components, etc) and the safety requirements are integrated into one model. While doing so, we have constructed the required traceability among them, which is necessary and very useful when the safety requirements need to be corrected or be changed. The use of the traceability makes it possible to easily check out whether and how the safety requirements are properly incorporated in the system design process. Furthermore, without the verified traceability, the system cannot be changed or upgraded later. In order to implement the model on a computer-aided tool, we have constructed a database (DB) schema. As a result, the implemented model/DB allows to automatically generate TEP which can be used to measure the performance and safety level of the developed system.

This paper is to present linkage parameter to integrate statistical models and physical models for accelerated life test. Statistical models represent the relationship of probability distribution and life. Physical models show the relationship of life and stress. Moreover, this study proposes the four steps for construction of integrated models for accelerated life test using linkage parameter. Finally, this paper develops new integrated models such as extreme value distribution-general Eyring, linearly increasing failure rate function-general Eyring, etc., and estimates various reliability measures.

본 연구에서는 시험도로 계측 자료와 유한요소해석 기법을 사용한 구조해석 결과를 비교하여 포장 전반에 걸친 거동을 분석할 수 있는 기반을 마련하는데 목적이 있다. 시험도로와 같이 다양한 하중 재하시험을 통하여 얻은 계측 결과와 유한요소 해석 결과를 비교하여 타당성을 입증할 경우, 향후 포장의 구조해석 및 설계 과정에서 유한요소해석 기법의 다양한 응용이 가능하다. 본 연구에서는 슬래브, 린, 보조기층, 길어깨, 다웰 및 타이바가 모두 포함된 3차원 콘크리트 해석 모형을 개발하여 동일 조건의 시험도로 계측값과 비교분석을 실시하였다. 또한, 다양한 온도 조건에서 구조해석을 수행하여 컬링에 의한 슬래브 거동을 파악하였다. 콘크리트포장에서 얻어진 변형률계의 계측 결과들과 유한요소해석에서 얻어진 예측 변형률사이의 오차를 줄이기 위하여 분석 방식은 실제 상황과 유사하게 모사하도록 구현하였으며, 가능하면 변수들을 실제 상황과 일치하도록 변화시켰다. 온도 변화 등 여러 가지 상황을 현장과 동일하게 만든 결과, 유한요소해석에서 예측한 값들이 현장에서 얻은 계측값에 유사하게 접근하는 것을 확인할 수 있었다. 그러나 린층에서는 해석값이 다소 과다하게 발생하여 추가 연구가 필요할 것으로 판단된다. 또한 실제 컬링을 모사한 구조해석 결과 계측값과 거의 동일하게 나타났으며 영구컬링의 존재도 확인할 수 있었다.

  자동차 개발 단계는, 본질적으로, 수차례의 개발 단계를 거치면서 설계 그룹들 간의 정보 전달과 교환이 여러 차례 반복적으로 발생하게 된다. 이러한 복잡한 상호 정보 교환 과정을 정확하게 이해하여 업무가 수행되지 못하면 불필요한 재작업을 야기시킬 수 있으며, 이는 비용 낭비 및 계획에 차질이 발생할 수 있다. 이 연구에서는 시스템 다이나믹 모델을 개발하여 빈번한 design-built-test 싸이클이 자동차 개발 단계에 미치는 영향 및 이점들을 고찰

The purpose of this study was to develop protein enriched menu for the aged and running an acceptance test on the protein enriched menu. Four kinds of the menu were developed with emphasis on protein enriched food materials of chicken and beans for menu1, chunggukjang for menu2, pork for menu3, beef and mackerel for menu4. one portion of calorie, polysaccharide, protein and fats for the aged were calculated at 567kcal, 92.8g, 21.3g and 12.6g respectively based on recommended daily allowances for adults. Protein content increased in the menus 1, 2, 3 and 4 were 13.2%, 17.5%, 12.4%, and 13.3%, respectively. In the result of the acceptance test, the cooked rice with black beans and chicken soup of menu1 had significantly the highest acceptance score among the rice and soup groups, respectively (p<0.05). In the side dish, bean curd, cucumber and onion salad in menu1 had relatively higher acceptance scores than the others with significant difference at p<0.05. Overall acceptance of menu 1 had significantly the highest acceptance scores of all. Female showed significantly the higher scores of overall acceptance on menu 2 and 4 than those of male from the t test results of acceptance test.