• 분석과학
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• 제25권2호
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• pp.127-132
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• 2012

반도체와 전자부품의 코팅제로 사용되는, 특히 LCD와 PDP 커넥터주위의 보호를 위해 사용되는 폴리실록산(시편)의 흐름성(flow) 및 퍼짐성(self-leveling)을 측정할 수 있는 시험 장치가 고안되었고, 점도가 각기 다른 실록산 폴리머 견본들을 이용하여 고안된 시험장치를 시험하였다. 이 장치를 사용하여 시편의 흐름성 및 퍼짐성을 측정한 결과, 이 장치가 점도를 통해 흐름성 및 퍼짐성을 예측하던 것을 대신 할 수 있다고 판단되었다. 특히, 흐름성이 적절히 조절되어야만 하는 LCD, PDP 및 반도체 커넥션 보호 코팅제의 특성 평가에 유용하게 활용될 것으로 기대된다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2000년도 춘계학술대회 논문집
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• pp.703-707
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• 2000

Machine tool errors have to be characterized and predicted to improve machine tool accuracy. A real-time error compensation system has been developed based on volumetric error synthesis model which is composed of machine tool errors. This paper deals with new algorithm about verification of machine tool errors. This new algorithm uses a simplified volumetric error synthesis model. This simplified model is constructed with only main components among the error components of the machines. This main error components are analyzed by three-dimensional helical ball bar test. By substituting result of helical ball bar test fer simplified model, we could find that obtained error components are closed to real error components.

• PNF and Movement
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• 제11권2호
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• pp.1-7
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• 2013

Purpose : The purpose of this study was to describe the Intervention strategy applied ICF Tool about patient with cerebellar hemorrhage. Methods : The data was collected by patient with cerebellar hemorrhage. We applied the ICF Tool for patient with cerebellar hemorrhage. Parameters of result were collected for using the Timed up and go test, Berg balance scale and ICF assessment sheet. Results : Significant differences were observed the patient for Timed up and go test, Berg balance scale and ICF assessment sheet. patient with cerebellar hemorrhage improved all test. Conclusion : ICF Tool applied Intervention about patient with cerebellar hemorrhage is very useful and effective. It is effective in clinical practice.

• PNF and Movement
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• 제10권2호
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• pp.17-24
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• 2012

Purpose : The purpose of this study was to describe the Intervention strategy applied ICF Tool on patient with low back pain. Methods : The data was collected by low back pain patient. We applied the ICF Tool for low back pain patient. Parameters of result were collected for using the VAS, 6 minute walk test and ICF assessment sheet. Results : Significant differences were observed the low back pain patient for VAS, 6 minute walk test and ICF assessment sheet. low back pain patient improved all test. Conclusion : ICF Tool applied Intervention about low back pain patient is very useful and effective. It is effective in clinical practice.

• 한국공작기계학회논문집
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• 제18권2호
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• pp.162-169
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• 2009

This paper describes a study on dynamic characteristics analysis and dynamic compliance evaluation of a 5-axis multi-tasking machine tool of ram-head type. Structural dynamics analysis and evaluation are necessary to machine tool design and development to secure good machine tool performance against tough and harsh machining conditions. In this study, natural frequencies and corresponding vibration modes of the machine tool structure were analyzed by using both F.E.M. modal analysis and impulse hammer test. Furthermore, dynamic compliance of the machine tool was analyzed by using F.E.M. and also measured by using a hydraulic exciter test. Both the theoretical analysis and experimental test results showed good agreement with each other.

• 한국생산제조학회지
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• 제22권5호
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• pp.782-788
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• 2013

This study addresses the issue of safety of the splash guard of a computer numerical control (CNC) machine tool at the design stage. As an impact test for evaluating safety requirements such as strength under the safety regulation is an expensive and iterative task, it is necessary to develop a new method to minimize the task of the impact test for development of the machine tool. In this study, explicit finite element method was adopted for replacement of the impact test of the splash guard of a machine tool at the design stage. A finite element model was developed for implementing the impact test on an actual vertical CNC lathe and then produced the analysis including plastic strain and deformation to enable the safety of its splash guard to be determined. The analysis results demonstrated that the finite element method can be applied to safety evaluation for design of the splash guard of a CNC machine tool.

• 한국지구과학회지
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• 제24권6호
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• pp.508-523
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• 2003

본 연구에서는 고등학생들의 천문학적 공간개념 수준을 측정하기 위한 검사도구를 개발하였다. 이 검사도구는 천문학적 공간개념을 이루고 있는 기본적인 하위 요소들 (공간위치, 공간추리, 공간변화)을 평가할 수 있는 평가문항으로 구성되어있다. 개발된 검사도구는 274명의 고등학생들에게 투입되어 검증되었다. 문항 분석결과, 본 검사도구의 내용타당도는 98%였으며, 신뢰도(K-R 20)는 0.84, 정답율 52%, 변별도 지수 0.27로 나타났다. 따라서 이러한 결과는 본 검사도구가 고등학생들의 천문학적 공간개념 수준을 측정할 때 활용 가능함을 의미한다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2005년도 춘계학술대회 논문집
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• pp.370-376
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• 2005

This paper is described the program algorithm which can easily estimate dynamics of test support system by using mathematica tool based on the finite element method. We can determine the geometry, dimensions of the test support system, through tool stated in this paper for a certain test conditions. As a result of computer simulation and manufactured test support system's experiment in oder to verify suggested program, the dynamics of the test support system was well correspondent each other.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 2001년도 제33회 춘계학술대회 개최
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• pp.281-286
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• 2001

TiAIN was deposited onto ISO P2O Cutting Insert Tip substrate by FVAS at the substrate temperature of 80$^{\circ}C$. Cutting and wear test have been performed with TiAIN coated and uncoated WC cutting tools, respectively. Uncoated WC cutting tool has been tested under similar cutting condition for comparison. Cutting force and tool wear of coated and uncoated carbide cutting tools were investigated by cutting length. In cutting test, cutting force of the coated insert tip was larger than the uncoated insert tip by tool wear. Configuration and wear of the coated tool were more stable and resistant than the uncoated. In tool life by the tool wear, the coated cutting tool life was rather longer than the uncoated when tested at high speed (V=250 m/min) than low speed (V=200 m/min), Cutting force, tool wear and life were analysised by tool dynamometer amp(3ch) and oscilloscope.

• Journal of Platform Technology
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• 제8권4호
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• pp.47-58
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• 2020

DO-330 소프트웨어 도구 자격증명 고려사항은 항공기에 탑재되는 소프트웨어 및 하드웨어를 개발/검증 하기 위해 사용되는 도구 개발 프로세스에 적용하기 위한 지침이다. 이 지침 상의 도구 개발 프로세스 중 검증 프로세스는 DO-330을 준수하기 위해 달성해야 하는 목표 중 많은 비중을 차지하고 있어 상당히 중요하다. 특히, 도구의 안전성 수준이 높은 개발 도구의 시험 목표들은 독립적으로 수행되어야 하기 때문에 많은 시간, 비용, 그리고 인력이 투입되어야 한다. 시험 절차를 잘 수립 해 놓았을 지라도 시험의 복잡도가 높아지면 인적 오류가 발생할 확률이 높아진다. 본 논문에서는 한화시스템에서 개발한 A661UAGEN 도구의 효율적인 DO-330 검증 프로세스를 진행하기 위한 스크립트 기반의 시험 자동화 에이전트 소프트웨어 구조를 제시하고 평가하였다. 그 결과 스크립트 기반의 시험 자동화 에이전트를 통해 자동화 된 시험이 테스트 엔지니어에 의한 수동 시험 보다 시험 수행 시간은 87.5%가 감소되었고, 시험 생산성은 43.75%가 향상되었음을 확인하였다.