• Transactions of the Korean Society of Automotive Engineers
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• v.20 no.5
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• pp.1-7
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• 2012

Automobile airbag deployment process has been studied with MADYMO software. Based on the FMVSS208 and USNCAP(United States New Car Assessment Program) regulations, four parameters were chosen for the design improvement with reference to the 5th percentile female passenger dummy: time to fire, vent hole size, tether length and tank test pressure of inflator. Sensitivity analyses based on orthogonal arrays show that enhanced protection of small females can be achieved with improved USNCAP rating within the boundary of FMVSS 208.

• Journal of the Korean Society for Nondestructive Testing
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• v.31 no.6
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• pp.635-641
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• 2011

In ultrasonic testing of dissimilar metal welds, application of phased array technique in terms of incident beam focusing is not easy because of complicated material structures formed during the multi-pass welding process. Time reversal(TR) techniques can overcome some limitations of phased array since they are self-focusing that does not depend on the geometrical and physical properties of testing components. In this paper, we test the possibility of TR focusing on a defect within anisotropic, heterogeneous austenitic welds. A commercial simulation software is employed for TR focusing and imaging of a side-drilled hole. The performance of time reversed adaptive focal law is compared with those of calculated focal laws for both anisotropic and isotropic welds.

• Transactions of the Korean Society of Automotive Engineers
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• v.7 no.8
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• pp.262-271
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• 1999

To design suspension system and estimate its durability , the loading history of each suspension part exposed to various operation conditions should be known from either measurement or computations. Based on these results, stress analysis is carried out to obtain the optimal shape and to reduce the production cost through the proper selection of manufacturing process. In this paper, first the measurement of 3-directional accelerations of wheel center using an accelerometer are undertaken from a vehicle running on Belgian road. Then the data measured from experiments are pre-processed with filtering . Based on the pre-processed data the methodology for determining the dynamic loading to each suspension part is developed by simply modeling the suspension system with ADAMS software. Eventually , it is expected that dynamic loadings can be used for the dynamic stress and fatigue analyses.

• KIEE International Transactions on Power Engineering
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• v.2A no.4
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• pp.136-144
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• 2002

Load models are very important for improving the accuracy of stability analysis and load flow studies. Various loads are connected to a power bus and their characteristics of power consumption change with voltage and frequency. Thus, the effect of voltage/frequency changes must be considered in load modeling. In this work, artificial neural networks-ANNs- were used to construct the component load models for more accurate modeling. A typical residential load was selected and subjected to a test under variable voltage/frequency conditions. Acquired data were used to construct component models by ANNs. The aggregation process of separately determined load models is also presented in the paper. Furthermore, this paper proposes a method to transform a single load model constructed by the aggregation method into a mathematical load model that can be used in traditional power system analysis software.

• Journal of Digital Convergence
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• v.9 no.1
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• pp.37-49
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• 2011

The purpose of this study is to develop a new equipment acceptance model in the industrial market and test it empirically using a field survey. To define new equipment acceptance factors of employees in the organization, we used the TAM as a useful model to analyze the acceptance process of new equipment. All of the data for the TAM were collected from the employees. Prior research studied the usage of general information technology using a computer and particular software, while we apply the TAM to the new equipment adoption. In this study, both theoretical review and empirical study were conducted and the model was set through the theoretical study which was tested through the empirical analysis. Management support and training/education were shown to have a positive effect on PU and PEOU. Personal innovativeness, management support, perceived usefulness and perceived ease of use were shown to have a positive effect on behavioral intention.

• Journal of the Semiconductor & Display Technology
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• v.14 no.4
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• pp.8-12
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• 2015

As NMP (N-Methyl-2pyrrolidone) is becoming important in many fields, the demand for it is also rising rapidly. With its chemical property of high boiling point, low vapor pressure and high water solubility, it is easy to recover it after processing. Therefore, it is increasingly needed to develop a system that effectively recovers NMP solvent. The study produced a system modeling using AMESim software before developing high purity solvent recovery (HPSR) system to recover NMP solvent. Then, it verified reliability by comparing the simulation model with the test result.

• Proceedings of the Korean Information Science Society Conference
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• 2001.04a
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• pp.673-675
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• 2001

본 논문에서는 Product line 개념을 활용하여 체계적으로 각 어플리케이션에 적합한 소프트웨어 테스트 프로세스를 생성할 수 있도록 하는 1)“소프트웨어 테스트 프로세스의 재사용 방안”을 제안하고, 2) 이를 자동화한 “소프트웨어 테스트 프로세스 생성 도구”프로토타입을 제시한다. “소프트웨어 테스트 프로세스의 재사용 방안”은 product line 개념에 따라 표준, 방법론과 도메인을 위한 개발 프로세스들의 공통점과 차이점을 분석하여 core asset들을 CBD개념의 컴포넌트들로 개발하고, 이 core asset들을 가지고 컴포넌트의 맞춤 패턴을 이용하여 손쉽게 각 어플리케이션에 적합한 테스트 프로세스를 생성할 수 있도록 한다. “소프트웨어 테스트 프로세스 생성도구”는 “소프트웨어 테스트 프로세스 재사용 방안”의 core asset 개발 단계에서 개발된 core asset들을 저장소에 재사용을 목적으로 저장하며, 프로덕트 개발 단계를 자동화하여 각 어플리케이션에 적합한 테스트 프로세스를 생성한다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06b
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• pp.74-79
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• 2007

고객이 요구한 제품은 테스트에 따라 그의 품질을 보장할 수 있기 때문에 테스트에 대한 관심과 중요성이 커지고 있는 만큼 테스트에 소요되는 비용 또한 실제 개발에 소요되는 비용에서 큰 비중을 차지하고 있고 그 중요성 또한 강조되고 있다. 하지만 실제 국내의 소프트웨어 개발 현실을 살펴 보면 제품의 개발 기한을 보장하기 위해서 테스트를 간과 함으로써 예상치 못하게 고객이 요구하는 제품의 품질을 만족시키지 못하고 있다. 또한 이러한 테스트 활동을 통한 품질 보장 활동의 필요성을 인정하지만 현재 개발 프로세스의 문제점 파악 혹은 개선 방향에 대해서 모호한 비전을 가지고 활동하기 때문에 성과가 미비하기도 하다. 본 논문에서는 국방 소프트웨어의 소프트웨어 개발 활동 내에서의 테스트 활동 및 제품의 품질에 대한 문제점을 지적하고 Cost of Quality (CoQ) 모델을 통해서 문제점을 분석함으로써 고 품질의 제품을 개발하기 위한 테스트 프로세스 개선에 대한 동기 부여 및 개선 방안을 제시하고자 한다.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.11
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• pp.224-233
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• 1999

The quality of injection molded parts is affected by the variables such as materials, design variables of part and mold, molding machine, and processing conditions. It is difficult to consider all the variables at the same time to predict the quality. In this paper neural network was applied to analyze the relationship between processing conditions and volumetric shrinkage of part. Engineering plastic gear was used for the study, and the learning data was extracted by the simulation software like Moldflow. Results of neural network was good agreement with simulation results. Nonlinear regression model was formulated using the test data of 3,125 obtained from neural network, Optimal processing conditions were calculated to minimize the volumetric shrinkage of molded part by the application of RQP(Recursive Quadratic Programming) algorithm.

• Proceedings of the Korea Information Processing Society Conference
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• 2013.11a
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• pp.1252-1255
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• 2013

오늘날 급변하는 IT 환경에 신속하게 대응하기 위한 기업의 데이터 관리시스템의 중요성이 강조되고 있다. 특히, 최근에는 기업의 시스템이 복잡해지고 데이터의 규모가 점점 대형화 되면서 기업들은 데이터 관리를 위해 메타데이터 관리시스템의 활용이 증가하고 있다. 하지만 현재 도입되는 메타데이터 관리시스템은 테이블 이관 시 모델과 실제 데이터베이스 사이의 정합성을 유지하기 위해 불필요한 반복적인 프로세스를 수행해야 하는 문제점을 가진다. 따라서 본 논문에서는 이러한 문제점을 해결하기 위하여 이관관리 프로세스 개선을 위한 메타데이터 관리시스템을 구현하고 테스트 하였다.