• Korean Journal of Remote Sensing
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• v.10 no.2
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• pp.49-62
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• 1994

Look direction bias in a single look SAR image can often be misinterpreted in the geological application of radar data. This paper investigates digital processing techniques for SAR image data integration and compensation of the SAR data look direction bias. The two important approaches for reducing look direction bias and integration of multiple SAR data sets are (1) principal component analysis (PCA), and (2) wavelet transform(WT) integration techniques. These two methods were investigated and tested with the ERS-1 (VV-polarization) and CCRS*s airborne (HH-polarization) C-SAR image data sets recorded over the Sudbury test site, Canada. The PCA technique has been very effective for integration of more than two layers of digital image data. When there only two sets of SAR data are available, the PCA thchnique requires at least one more set of auxiliary data for proper rendition of the fine surface features. The WT processing approach of SAR data integration utilizes the property which decomposes images into approximated image ( low frequencies) characterizing the spatially large and relatively distinct structures, and detailed image (high frequencies) in which the information on detailed fine structures are preserved. The test results with the ERS-1and CCRS*s C-SAR data indicate that the new WT approach is more efficient and robust in enhancibng the fine details of the multiple SAR images than the PCA approach.

• Journal of Positioning, Navigation, and Timing
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• v.9 no.2
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• pp.131-138
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• 2020

In this paper, we analyze the delay phenomenon that can occur when controlling an unmanned aerial vehicle using a camera and describe a solution to solve the phenomenon. The group of pictures (GOP) value is changed in order to reduce the delay according to the frame data size that can occur in the moving image data transmission. The appropriate GOP values were determined through experimental data accumulation and validated through camera self-test, system integration laboratory (SIL) verification test and system integration test.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.175-178
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• 2007

COMS (Communication Ocean Meteorological Satellite) is the geostationary satellite being developed by Korea Aerospace Research Institute for multi-mission: experimental communication, ocean monitoring and meteorological observations. The COMS operation is controlled by the on-board software running on the spacecraft central computer. The software is written in ADA language and developed under the software life cycle: Requirement analysis, Design, Implementation, Component test and Integration test. Most functional requirements are tested at component level on a software component testing tool, ATTOL. ATTOL provides a simple way to define the test cases and automates the test program generation, test execution and test analysis. When two or more verified components are put together, the integration test starts to check the non-functional requirements: real-time aspect, performance, the HW/SW compatibility and etc. This paper introduces the COMS on-board software and explains what to test and how to test the on-board software at component level using ATTOL.

• Proceedings of the KSRS Conference
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• 2007.10a
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• pp.460-463
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• 2007

COMS (Communication Ocean Meteorological Satellite) is the geostationary satellite being developed by Korea Aerospace Research Institute for multi-mission: experimental communication, ocean monitoring and meteorological observations. The COMS operation is controlled by the on-board software running on the spacecraft central computer. The software is written in ADA language and developed under the software life cycle: Requirement analysis, Design, Implementation, Component test and Integration test. Most functional requirements are tested at component level on a software component testing tool, ATTOL. ATTOL provides a simple way to define the test cases and automates the test program generation, test execution and test analysis. When two or more verified components are put together, the integration test starts to check the non-functional requirements: real-time aspect, performance, the HW/SW compatibility and etc. This paper introduces the COMS on-board software and explains what to test and how to test the on-board software at component level using ATTOL.

• The Bulletin of The Korean Astronomical Society
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• v.34 no.1
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• pp.169.2-169.2
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• 2009

• The Journal of Korean Academy of Sensory Integration
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• v.11 no.2
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• pp.41-56
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• 2013

Objective : The purpose of this study tried to present the performed average and range through systematic review about assessment tools that measures the praxis ability of sensory integrative function for foreign and domestic normal children. Methods: With making use of Medline, PubMed, Ovid, Eric, the Library of Congress, National Science and Technology Information Center, Kiss, RISS, and the Google search engine, we searched the name of assessment tool on the basis of the framework of the theory of sensory integration. Target paper was thesis and Journal published from January 2000 to April 2011. Results: Total of 24 papers were retrieved, used assessment tools were Bruininks-Oseretsky Test of Motor Proficiency (BOTMP), Bruininks-Oseretsky Test of Motor Proficiency, Short Form (BOTMP-SF), Bruininks-Oseretsky Test of Motor Proficiency, Second Edition (BOT-2), Bruininks-Oseretsky Test of Motor Proficiency, Second Edition, Short Form (BOT-2-SF), Clinical Observations of Motor and Postural Skills (COMPS), Motor Assessment Battery for Children (MABC), Clinical Test of Sensory Interaction with Balance (CTSIB), and subtest of Sensory Integration and Praxis Test (SIPT). We presented the average and range of assessment tools applied to normal children in each country. Conclusion: A performed result in other cultural and domestic normal children which this study presented will provide a standard in comparison with performance of children with disabilities who are the actual clinical evaluation.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• 1995.05a
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• pp.71-81
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• 1995

The Propulsion System Integration can be defined as the optimization technology of combining the propulsion system components with the airframe to achieve the overall aircraft misson performance goals. The disposition of propulsion system components on engine compartment enveloped by front fuselage and fire bulkhead is very restricted because of the interference with nose L/G and engine mountig strut. The design of components depends on the traditional technical data base. The engine satisfying a customer's ROC was selected among worldwide existing engines by the comparision studies of performance analysis with enigine installed effect, future growth potential, ILS, and application to aircrafts, etc. The ground test of the propulsion system integration was performed in the test cell and on the aircraft to assure the function of the components. The flight test was performed to confirm complying the performance requirements.

• Journal of Korean Academy of Nursing
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• v.41 no.5
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• pp.694-703
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• 2011

Purpose: In this study the effects of a Group Counseling Integration Program for students with a tendency to internet addiction were examined. Methods: Thirty-seven students who were in a vocational high school in G city participated in a survey, which was carried out from October 12 to November 12, 2009. To test the effects of the Group Counseling Integration Program, the participants were divided into two groups, an experimental group (18) and a control group (19). The research design used in this study was a nonequivalent control group non-synchronized pre-posttest quasi-experimental research design. The research tools included a self-determination scale and an internet addiction scale. Data were analyzed using Chi-square test, t-test, and ANCOVA with the SPSS/WIN 14.0 program. Results: Significant differences were found in self-determination scores and internet addiction scores between the experimental group and the control group (F=5.99, p=.020) (t=-2.53, p=.016). Conclusion: The results indicate that Group Counseling Integration Programs are an effective nursing intervention for improving self-determination and decreasing internet addiction in students with a tendency to internet addiction.

• Journal of Korea Port Economic Association
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• v.34 no.3
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• pp.183-200
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• 2018

This study empirically tests the presence of rational bubbles in the ship prices using time series data from October 1996 to April 2017. To detect the existence of ship prices' rational bubbles, we use integration and cointegration tests, which were proposed by Campbell and Shiller(1987) and Diba and Grossman(1988), for circumventing misspecification of ship price model and applying the bubble test to nonstationary time series. The result of integration test supports existence of tanker price's rational bubble. The co-integration test also shows that drybulk ship and containership prices have been overvalued relative to the market fundamental, drybulk and container freight rates, due to non-stationary rational bubbles. These results provide Korean shipping industry and authorities implications that anticyclical ship investment and long-term and steady fleet capacity expansion policy are needed.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.44 no.9
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• pp.825-832
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• 2016

This paper describes the development of a data bus analyzer for use in avionics systems integration test. The data bus analyzer is equipped with MIL-STD-1553B, CAN and Ethernet interface cards which is incorporated in a majority of the avionics systems to accommodate a variety of interfaces. It has an individual hardware for a capture engine and a analyzing engine in order to perform the collection and the analysis of the bus data at the same time efficiently. It provides a data display function of the grid, 2-dimensional and 3-dimensional form to increase the data analysis efficiency. Verification of the data bus analyzer was carried out module unit testing and inter-module integration testing on the basis of the test procedures. Verification of interlocking requirement and usefulness of developed equipment was confirmed through an integration test result performed on a system integration laboratory of aircraft which is an actual testing environment.