• 한국수학교육학회지시리즈B:순수및응용수학
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• 제20권2호
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• pp.109-116
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• 2013

In this paper, we propose a Jonckheere type test statistic for testing the parallelism of k regression lines against ordered alternatives. The order restriction problems could arise in various settings such as location, scale, and regression problems. But most of theory about the statistical inferences under order restrictions has been developed to deal with location parameters. The proposed test is an application of Jonckheere's procedure to regression problem. Asymptotic normality and asymptotic distribution-free properties of the test statistic are obtained under some regularity conditions.

• 정보처리학회논문지D
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• 제13D권2호
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• pp.215-222
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• 2006

모바일 소프트웨어의 생산성을 높이고 신뢰성 있는 소프트웨어를 개발하기 위한 모바일 소프트웨어 테스트의 중요성이 부각되고 있다. 모바일 소프트웨어의 테스팅 기술이 효율적으로 적용되기 위해서는 모바일 플랫폼 기반의 테스트를 자동화 할 수 있는 기술이 필요하다. 즉, 모바일 플랫폼에서 제공하는API를 테스트 하기 위한 테스트케이스를 생성할 수 있는 기법이 필요하다. 테스트케이스를 생성하게 되면 소프트웨어의 생산성과 신뢰성을 향상 시킬 수 있을 뿐만 아니라, 테스트 기간 및 비용을 줄일 수 있다는 이점이 있다. 본 논문에서는 기존의 테스트 자동화에 관련된 연구와 테스트 자동화 도구에 대한 연구를 통해 테스트케이스 생성 범위를 설정하고, J2ME 플랫폼에 사용될 수 있는 테스트케이스 생성 기법인 키워드 방식 기법(Keyword Driven Method)을 제시하였으며, 제안한 생성 기법을 적용하여 J2ME 플랫폼 기반의 테스트에 활용 가능한 테스트케이스 생성 기법이 되도록 하였다.

• Journal of Advanced Marine Engineering and Technology
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• 제26권4호
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• pp.425-431
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• 2002

In this study the characteristics of E-EGR valve developed by electrical method were analysed and the feasibility of application to vehicles was evaluated. The engine of smart car applied for diesel passenger car of small-displacement size developed by common vehicle was used for this experiment. It was installed a 3-cylinder, $0.8\ell$, turbo-charged light duty diesel engine with an electronic EGR valve. After the analysis and comparison of E-EGR valve performance by test bench, the estimation of vehicle application was executed through the EGR map and CVS-75 test result measured on the chassis dynamometer.

• 에너지공학
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• 제11권3호
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• pp.203-209
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• 2002

본 연구에서는 유니크에서 개발된 E-EGR 밸브의 특성을 분석하였으며, 차량적용의 가능성을 평가하였다. 메르세데스 벤츠에서 개발된 배기량 0.8리터급 소형디젤 승용차인 Smart cat가 본 실험에 사용되어졌다. 실험용 차량은 전자식 EGR 밸브가 장착된 3기통의 터보 과급식 차량이다. 테스트벤치에서 EGR 밸브의 성능을 비교 및 분석한 후 차대동력계상에서 EGR map과 CVS-75 시험결과를 통하여 전자식 EGR 밸브의 차량적용 가능성을 여부를 수행하였다.

• 한국윤활학회:학술대회논문집
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• 한국윤활학회 1997년도 제26회 추계학술대회
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• pp.161-166
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• 1997

Application of hot roiling oil lubrication technology was broadened to the field of RM stands of Hot Rolling Mill at Pohang works. The primary object was to improve the quality of the strip sttrface and the rolls by oil lubrication in hot rolling process. Prior to the actual field application preliminary test was conducted to evaluate the effect of hot rolling oil lubrication at RM stands. From the test, it has been found that the use of oil lubrication tends to prevent the progression of the heat cracks and thereby increases the quality of the strip surface and the wear life of the rolls. New hot rolling oil lubrication system was applied to the RM stands VSB, R1, R2, R3, R4 and edger rolls. With the introduction of a rolling lubricant, the quality of the strip surface and rolls was improved and overall roll dressing has decreased. Also there has been a improvement of productivity from the long roll life.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2008년도 International Symposium on Remote Sensing
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• pp.208-211
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• 2008

Band-limited filtering will be applied to remove interference resulted from two neighbored channels in the transmission of KOMPSAT-5 X-Band image data. In that case, receiver in ground station should prepare righteous matched filter to avoid huge BER degradation depending on the matched filter of COTS receiver. As an effort to simulate the bandlimited filtering, test filter was designed and manufactured on the basis of main specification for output filter of KOMPSAT-5 satellite. Consequently, 1.8dB of BER degradation was measured at the output of test band-pass filter, but the degradation was downsized up to 0.4dB thanks to the adaptive matched filter of COTS receiver.

• 전기학회논문지
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• 제58권1호
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• pp.7-13
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• 2009

This paper presents benefits of multi-agent system approach and its application to the distribution automation system. Special attention is devoted to the description of hardware and communication platform used to upgrade the conventional distribution automation system structure. Service restoration of primary distribution system is selected as an example of the multi-agent system application. Application of the algorithm for multi-agent based service restoration technique is disclosed in detail. Real field test in Gochang test center of KEPCO has been performed to establish the feasibility of proposed technique.

• 한국자동차공학회논문집
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• 제22권3호
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• pp.68-74
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• 2014

As the number of ECUs (Electronic control units) are increasing, reliability and functional stability of a software in an ECU is getting more important. Therefore the application of functional safety standards ISO 26262 is making the software more reliable. Software fault injection test (SFIT) is required as a verification technique for the application of ISO 26262. In case of applying SFIT, an artificial error is injected to inspect the vulnerability of the system which is not easily detected during normal operation. In this paper, the basic concept of SFIT will be examined and the application of SIFT based on ISO26262 will be described.

• 기술발표회
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• 통권2006호
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• pp.66-72
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• 2006

The ground anchoring has been utilized over 40 years. It is growing the application of the removal ground anchor with tension force for holding earth retaining constructions in the city. It transmits tension stress of prestressed steel wire through grouting to fixed the ground that is of great advantage adjacent ground stability. Nowadays, we can find the compression dispersion anchor on many site. But, it has some problems in behavior of anchors because of impossible to tense p.c strand uniformly under the existing equipment due to different length of p c strand. Hence, motive of this research was to study the application of the newly developed tension system, that analyze and compare with the current anchoring method build on the data of in-site test and laboratory test. As a result, in case of auto back tension system, it became clear that tension pressure was equally distributed among the steal wires but the existing tension system showed sign of instability by indicating stress deflection of about 30% compare with design load. This can cause an ultimate failure of the concentrated p.c strand and a shear failure of ground.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1998년도 하계학술대회 논문집 E
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• pp.1638-1640
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• 1998

We describe the possibility of field application and the diagnosis method of winding deformation in the power transformers using L.V.I. test system. Any winding deformation will result in a change of capacitance between winding parts and passibly some change in the winding inductance. These changes will then result in a change in the responce to the applied pulse in both the magnitude and period of the resulting oscillations. And we discuss with respect to test result of model transformer and commercial transformer, appear good results with application possibility in field.