• Title/Summary/Keyword: Test & Evaluation Process

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On the Improvement of the Test and Evaluation Process in the Weapon Systems Development with Systems Safety Considered (무기체계 개발에서 시스템 안전성을 고려한 시험평가 프로세스의 개선에 관한 연구)

  • Sim, Sang Hyun;Lee, Jae-Chon
    • Proceedings of the Safety Management and Science Conference
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    • 2013.04a
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    • pp.271-284
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    • 2013
  • 최근 현대 무기체계는 최첨단 기술로 인한 무기체계 개발 속도 증가와 획득환경의 다변화와 더불어 이에 대한 위험도 동시에 증가하고 있다. 이에 따라 미국방부는 무기체계의 수명주기를 고려하여 시험평가를 지속 적용토록 강조하고 있다. 따라서 기존의 무기체계 시험평가 프로세스에서 다루는 시스템 설계에 대한 단계별 안전 활동의 강화의 필요성 역시 강조되고 있다. 그 중에서도 무기체계 개발의 핵심 활동에 해당하는 체계개발 단계는 양산에 들어가기 전의 최종 활동으로서 제대로 수행되어야만 초기에 의도한 무기체계 개발의 목적을 달성할 수 있을 것이다. 본 논문에서는 시스템 안전성 요소를 고려한 시험평가 프로세스의 개선사항 도출과 모델링을 통해 무기체계 시스템인 무기체계를 대상으로 적용 및 조정 구축에 대한 내용을 기술하고 있다. 본 연구의 결과를 토대로 향후 시험평가 기간의 단축 및 비용 절감과 데이터의 관리 및 추적 기능을 개선함으로써 무기체계 개발 후의 안전사고 발생 가능성을 줄일 수 있을 것으로 기대된다.

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Method of an Assistance for Evaluation of Learning using Expression Recognition based on Deep Learning (심층학습 기반 표정인식을 통한 학습 평가 보조 방법 연구)

  • Lee, Ho-Jung;Lee, Deokwoo
    • Journal of Engineering Education Research
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    • v.23 no.2
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    • pp.24-30
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    • 2020
  • This paper proposes the approaches to the evaluation of learning using concepts of artificial intelligence. Among various techniques, deep learning algorithm is employed to achieve quantitative results of evaluation. In particular, this paper focuses on the process-based evaluation instead of the result-based one using face expression. The expression is simply acquired by digital camera that records face expression when students solve sample test problems. Face expressions are trained using convolutional neural network (CNN) model followed by classification of expression data into three categories, i.e., easy, neutral, difficult. To substantiate the proposed approach, the simulation results show promising results, and this work is expected to open opportunities for intelligent evaluation system in the future.

Design and Implementation of Teacher Supporting Component on Web (웹 기반 교육 시스템에서 교수지원 컴포넌트의 구현)

  • Haeng-Kon Kim;Jeon-Geun Kang
    • Journal of the Korea Computer Industry Society
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    • v.2 no.9
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    • pp.1139-1146
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    • 2001
  • The value of Web in information societyis increasing in the field of education. Web Based Instruction (WBI) has an unlimited possibility of access the information. It also overcome the constraint of time and space more than the previous class learning method. The previous WBI system informed the results of study to learners after a professor's lecture and test was given. The uniform test didn't make the professor recognize the learner's evaluation according to the level of the learner and it couldn't be a reason to change a teaching method. In this paper, we discuss the Learning Evaluation(LE) component which can support a teaching method to teachers. We suggest LE component for supporting teachers as suggesting visually the test result of pre-test by step and post-test with several ways after analyzing, designing and realizing the evaluation of the test based on CDP(Component Development Process).

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A Study of Enhanced Test Maturity Model with Test Process Improvement (테스트 프로세스 개선모델을 통한 테스트 성숙도 모델 (Test Maturity Model) 확장에 관한 연구)

  • Kim, Ki-Du;Kim, Young-Chul
    • The KIPS Transactions:PartD
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    • v.14D no.1 s.111
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    • pp.57-66
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    • 2007
  • Organizations of Software development are very important issue on enhancement of a software quality as rapid progress of software industry. Especially there are diverse attempts for enhancement of test maturity of the software organization through some kinds of the test maturity model. But the current test maturity models based on CMM(Capability Maturity Model) lack part of actual testing measurement and only measure level of test maturity. To solve these problems, we suggest 'double V-model' to execute both software development process and test process simultaneously, and also 'test attributes to Maturity Levels Correlation Matrix' for evaluating level of test maturity included with definitions of test attribute and level. That is, we enhance TMM(Test Maturity Model) adopted with 'Improvement Suggestion' of TPI(Test Process Improvement) which is easy the evaluation of test maturity of organization and gives the direction of improvement to level up the test maturity for the measured organization. As a result, we will contribute to level up the test maturity of the organization.

Comparison of Effects of Nursing Process Reeducation according to Academic Credit Bank System Student Nurses' Clinical Experience - Expertise, Critical Thinking Disposition, Clinical Decision Making - (학점은행제 교육과정 간호사들의 임상경력에 따른 간호과정 재교육의 효과 비교 - 숙련성, 비판적사고 성향, 임상의사결정 능력을 중심으로 -)

  • Yi, Yeo-Jin
    • Journal of Korean Academy of Nursing Administration
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    • v.15 no.2
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    • pp.275-283
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    • 2009
  • Purpose: This study investigated the effects of reeducation of nursing process on nurses' expertise, critical thinking disposition, and clinical decision making. Methods: Data were collected from March to June, 2007. The subjects were 47 Academic Credit Bank System Student Nurses. They were taught 'nursing process' during 1 semester(15weeks). 47 nurses were divided into three groups according to clinical experience(under 3 years, 3 to under 5 years, 5 years or more). After 15 weeks, the effects of education were compared using a paired t-test between pre-test and post-test. Results: There was a significant difference in the 3 to under 5 years experienced nurses's expertise(t=-3.659, p=.004) between the pre-test and post-test. There was a significant difference in the 5 years or more experienced nurses's expertise(t=-5.781, p<.001) and critical thinking disposition(t=-3.345, p=.003) between the pre-test and post-test. There were no significant differences in clinical decision making(accuracy, proficiency, and confidence) of 3 groups. Conclusion: Reeducation of nursing process is a valuable teaching and an evaluation strategy for 5 years or more experienced nurses to improve expertise and critical thinking disposition. We need to develop continuing education program for improving nurses' clinical decision making.

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Development of Testing Evaluation System far Analyzing Squeal Noise characteristic of the Brake System (제동장치 스퀼소음의 특성 분석을 위한 시험평가시스템 개발)

  • Park, Ho;Kim, Dong-Kyu;Kim, Heung-Seob
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.10 no.6
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    • pp.21-28
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    • 2001
  • Analysis of squeal noise generated during brake operation is an important task for the improvement of brake noise prob-lem. By the use of measuring instrument and techniques, test and evaluation process are to be developed systematically in quantitative analysis. The cost far test and evaluation 7an be reduced, and the technical power can be raised by the devel- oped system.

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Evaluation of water-Soluble Lubricant for Cold Forging and Optimization of Coating Process (냉간단조용 수용성 윤활제의 평가 및 윤활 처리 공정의 최적화)

  • Lim, W.J.;Lee, I.S.;Je, J.S.;Ko, D.C.;Kim, B.M.
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 2007.05a
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    • pp.149-154
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    • 2007
  • The zinc prosphate film treatments used to lubricating treatment of mostly cold forging processes. But there are several problems happened to lubricating treatment process such as happening harmful environment on person, complex lubrication processing occurring in energy and time consumption, eco-destructive and chemical by-product generation, the needs of waste disposal etc. As a result, a water-soluble lubricant was developed to replace the perfect or some of the zinc prosphate film in the world. In order to solve these problems, this study evaluated the performance of the typical water-soluble. In this study, for these requirement inquiry of two part. First, about possibility of replace zinc phosphate lubricant, quantitatively evaluation developed of water-soluble lubricant for cold forging vs zinc phosphate lubricant. Second, About optimization of coating Process use to equipment with practicable automatic coating Process. The performance evaluation of these lubricants was conducted using the double cup extrusion test and spike forging test. With the use of the commercial FE code DEFORM, friction factor calibration curves, i.e. cup height ratio vs. punch stroke and spike height vs. punch stroke, were established for different friction factor values. By matching the cup height ratio and the punch stroke and spike height vs. punch stroke from experiment to that obtained from FE simulations, the friction factor of the lubricants was determined. Survey of comparative analysis use to SEM that sprayed lubricant surface structure of grain shape and characteristic of lubricant performance based on grain shape and deformed lubricant surface expansion. As a result, developed lubricant were found to perform comparable to or better than zinc phosphate. And thought this result, innovatively cope with generated problem of existing lubrication process.

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Board Level Reliability Evaluation for Package on Package

  • Hwang, Tae-Gyeong;Chung, Ji-Young
    • Proceedings of the International Microelectronics And Packaging Society Conference
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    • 2007.04a
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    • pp.37-47
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    • 2007
  • Factor : Structure Metal pad & SMO size Board level TC test : - Large SMO size better Board level Drop test : - Large SMO size better Factor : Structure Substrate thickness Board level TC test : - Thick substrate better Board level Drop test : - Substrate thickness is not a significant factor for drop test Factor : Material Solder alloy Board level TC test : - Not so big differences over Pb-free solder and NiAu, OSP finish Board level Drop test : - Ni/Au+SAC105, CuOSP+LF35 are better Factor : Material Pad finish Board level TC test : - NiAu/NiAu is best Board livel Drop test : - CuOSP is best Factor : Material Underfill Board level TC test - Several underfills (reworkable) are passed TCG x500 cycles Board level Drop test : - Underfill lots have better performance than non-underfill lots Factor : Process Multiple reflow Board level TC test : - Multiple reflow is not a significant actor for TC test Board level Drop test : N/A Factor : Process Peak temp Board level TC test : - Higher peak temperature is worse than STD Board level Drop test : N/A Factor : Process Stack method Board level TC test : - No big difference between pre-stack and SMT stack Board level Drop test : - Flux dipping is better than paste dipping but failure rate is more faster

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Investigation of Chill Down Characteristics of Liquid Oxygen Feeding System in 75 Tonf-class Liquid Rocket Engine Firing Test (75톤급 액체로켓엔진 연소시험에서의 액체산소 공급부 예냉특성 고찰)

  • Seo, Daeban;Cho, Namkyung;Han, Yeoungmin
    • Journal of the Korean Society of Propulsion Engineers
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    • v.22 no.4
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    • pp.108-116
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    • 2018
  • A firing test of the 75 tonf-class liquid rocket engine to be used as the first and second stage engines of the KSLV-II was carried out at the rocket engine test facility(RETF). Since this engine uses liquid oxygen as the oxidizer, which is a cryogenic fluid, it is essential that the chill down of the supply pipe line and engine proceed for the firing test; thus, the given inlet requirements must be met. Moreover, it is important to understand the chill down characteristics of the facility and the engine and the amount of liquid oxygen consumed in the chill down process for efficient test operation in the future. In this paper, chill down characteristics of the supply pipe and the engine were evaluated through the investigation of the chill down process of the 75 tonf-class liquid rocket engine at each stage before and after run tank pressurization. In addition, the amount of liquid oxygen consumed was also evaluated.

Design & system construction of insulation on the traction motor for EMU (철도차량용 견인전동기의 절연설계 및 절연시스템 구성)

  • 왕종배;홍선호;조연옥;김명룡
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.07a
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    • pp.194-197
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    • 2001
  • Traction motors driven by high speed switching inverters is demanded higher operating temperature, severe duty cycles, higher starting current, frequent voltage transients and finally severe environmental exposure. For applications to inverter duty, traction motors needs a special insulation system, which has characteristics of increased bond strength, lower operating temperature and higher turn-to-turn insulation. In this paper, design considerations and manufacturing procedure of 200 Class insulation system with polyimde(Kapton) main insulation and silicone resin VPI process on the traction motor for EMU will be reviewed. And performance test and long life evaluation test which prove stability and long life evaluation test which prove stability and reliability of insulation system for traction motor will be introduced.

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