• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.481-484
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• 2002

소프트웨어는 매우 다양하며, 품질을 정량적으로 측정하기 어렵기 때문에 객관적인 소프트웨어 평가를 위하여 지속적인 연구가 이루어지고 있으며, 이와 관련한 국제 및 국내 표준이 개발 중에 있다. SW시험센터는 ISO/IEC 9126을 포함한 여러 표준을 기반으로 소프트웨어 품질인증 업무를 수행하고 있으며 품질 평가와 관련된 연구를 수행하고 있다. 본 논문에서는 현재 서비스중인 소프트웨어 품질인증 서비스와 품질인중 프레임웍에 대하여 기술하고자 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2018.11a
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• pp.81-82
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• 2018

선박안전법에 따라 대다수의 관공선 주기관은 8년마다 정기 개방검사를 해야 한다. 주기관 특성상 개방검사는 많은 예산 소요 및 엔진 효율성의 저하가 우려되어 이를 해결하고자 관련법에 따라 8년간 개방검사 면제 사전 준비로 예산을 절감하고 기관의 성능을 최적화 시켰다.

• Proceedings of the Korean Information Science Society Conference
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• 1999.10a
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• pp.409-411
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• 1999

본 논문에서 소개하고 있는 비주얼 자바가상기계 시뮬레이터는 자바 컴파일러에 의해 컴파일된 결과인 바이트코드를 분석하고, 그 분석된 결과가 자바가상기계내부구조에 어떻게 할당되는지를 시각적으로 보여줌으로써 자바 소스 코드가 보여주지 못하는 가상기계 내부의 메소드 영역, 자바 스택 영역, 힙 영역에 할당되는 정보를 통해 자바 소스 프로그램의 보다 명확하고 쉬운 이해가 가능하도록 한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2009.04a
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• pp.409-412
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• 2009

통합보안관리시스템(Enterprise Security Management)은 기업의 보안 정책을 기반으로 다수의 보안시스템을 중앙에서 통합관제, 운영, 관리를 지원하는 시스템이다. 국내의 경우 정보보호시스템에 대한 보안성 평가는 국제공통평가기준을 근거로 평가 및 인증이 이루어지고 있는 반면, SW 품질관점에서의 ESM에 대한 평가 방안에 대한 연구는 미미한 실정이다. 이에 따라 본 논문에서는 SW 품질관점에서 ESM에 대한 평가항목을 제안하고자 한다.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.37 no.6
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• pp.465-472
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• 2019

The SPR (Single Photo Resection) is widely used as a method of estimating the EOPs (Exterior Orientation parameters) at the time of taking a photograph, but it requires an initial value and has a disadvantage of being sensitive to the initial value. In this study, we introduce quaternion-based single photo resection and PnP (Perspective-n-Point) algorithm that do not require initial values and compare the results. Photos were taken using a general smartphone, and the ground control point acquisition was based on the hybrid MMS (Mobile Mapping System) point cloud data possessed by the researchers. As a result, when the collinear condition based SPR is true value, quaternion-based SPR has higher attitude angle estimation accuracy than PnP algorithm. In case of camera position estimation, both algorithms showed accuracy within 0.8m when compared with ground control points.

• Journal of the Korean Data and Information Science Society
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• v.28 no.5
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• pp.1021-1026
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• 2017

Mixture experiments are commonly encountered in many fields including food, chemical and pharmaceutical industries. In mixture experiments, measured response depends on the proportions of the components present in the mixture and not on the amount of the mixture. Statistical analysis of the data from mixture experiments has mainly focused on a continuous response variable. In the example of quantal response data in mixture experiments, however, the tumor incidence data have been analyzed in Chen et al. (1996) to study the effects of 3 dietary components on the expression of mammary gland tumor. In this paper, we compared the logistic regression models with linear predictors such as second degree Scheffe polynomial model, Becker model and Akay model in terms of classification accuracy.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2004.04a
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• pp.343-350
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• 2004

LNGC suffers a great heat inflow during navigation and this heat inflow inevitably boils off the LNG. The boiled off gas(BOG) is normally consumed as a fuel for ship's engine. The boiled off LNG means a loss of cargo during transportation from the viewpoint of shipper. Therefore, a contract between shipper and ship operator is made on the limit of boiled off rate(BOR) under 0.15 ％／day based on laden voyage. This contract on BOR limit requires that ship's officer has a correct knowledge on BOR for his ship. But, in most cases ship is operated based on only officer's experiences. In this study, author presented a simple model to predict the boiled off gas(BOG) during navigation based on the existing precision heat exchange design technology about the heat distribution on the hull and heat inflow from outside through the hull. The BOG is calculated for ballast and laden voyage based on the actual weather conditions and verified by comparing with the measured BOG for the study ship. The study ship is a membrane type LNGC which is now servicing in Middle east route. Thus, the BOG prediction method which is presented in this study is expected to be used for an useful tool to manage the BOG in now servicing LNGC.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37B no.9
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• pp.837-848
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• 2012

This study has conducted the economic effects of R&D investment in the IT industry using multi-regression analysis with three independent variables; capital stock, labor input and R&D stock. In this study, the IT industry has been categorized into three sub-industries; broadcasting communication appliances, information appliances and electronic components industry. Our analysis has found that auto-correlation shows considerable levels whereas figures of t-value and R-square show significant levels among all the IT sub-industries. Meanwhile, the values of R&D stock in the information appliances industry and that of labor input coefficients in the electronic components industry were minus, thus multi-collinearity was suspected. We have solved the problems regarding auto-correlation and multi-collinearity through Cochrane-Orcutt estimation and principal components analysis. This paper has derived the implications that R&D investment in the broadcasting communication industry is much more influential than any other IT sub-industry.

• Journal of the Korean Data and Information Science Society
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• v.18 no.2
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• pp.327-344
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• 2007

Ridge partial least squares regression (RPLS) is a regression method which can be obtained by combining ridge regression and partial least squares regression and is intended to provide better predictive ability and less sensitive to overfitting. In this paper, explicit expressions for the shrinkage factor of RPLS are developed. The structure of the shrinkage factor is explored and compared with those of other biased regression methods, such as ridge regression, principal component regression, ridge principal component regression, and partial least squares regression using a near infrared data set.

• Journal of the Korean Data and Information Science Society
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• v.28 no.1
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• pp.1-10
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• 2017

Longitudinal data of Korean child academic achievement have been used to find the significant exploratory variables under the assumption of independent repeated measured data. Using the exploratory variables in previous research works, we analyze the linear mixed model incorporating the fixed and random effects for child academic achievement to detect the significant exploratory variables. Korea welfare panel study data observed three times between 2006 and 2012 by additional survey for children. The child academic achievement is evaluated by the sum of academic achievements of Korean, English and Mathematics. We also investigate the multicollinearity and the missing mechanism and select some popular correlation matrices to analyze the linear mixed model.