• Journal of the Korean Society for information Management
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• v.24 no.4
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• pp.173-189
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• 2007

By measuring satisfaction index of the users of Information System, it is possible not only to estimate ROI(Return on Investment) but also to draw the device for the efficiency and improvement of the System. This study tries to give User Satisfaction Index Model for the System, and present operators and managers of the system with the method for improving satisfaction and efficiency by measuring the User Satisfaction Index of representative information systems. For this, the survey was carried out for the representative information systems. On the basis of the analysis, Satisfaction Index was drawn and through Matrix Analysis, the strategy for system improvement was derived.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.182-189
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• 2007

To reform and improve the productivity of construction industry, 1) it should be encouraged to improve the construction production process and 2) it is required to enhance reliability of construction information based on the systematic thinking process. To promote the information reliability created during construction production process, Lean Construction Research Center(LRC2) is developing a supporting system to improve design/material supply/schedule management, functioning to efficiently manage the information created at construction production processes and developing a web based construction information system that provides result management/decision making support/knowledge based information services.

• 축산식품과학과 산업
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• v.9 no.2
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• pp.58-65
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• 2020

우울증은 동기, 의욕, 관심, 주의력, 정신기능 및 식욕의 감소를 특징으로 하는 일종의 기분 장애이다. 우울증은 유전적, 내분비 및 환경적 스트레스를 포함한 다양한 원인에 의해 발생하지만 가벼운 우울증은 식이요법으로 개선되는 것으로 보고되었다. 따라서 우울증 환자를 치료하기 위해서는 기능성 및 영양 보충제를 포함한 다양한 식품 공급원이 필요하다. 치즈에는 숙주 건강에 유익한 영향을 미치는 생리 활성 펩타이드가 포함되어 있다. 특히 저지(Jersey) 우유는 홀스타인(Holstein) 우유보다 고형분 함량이 높은 것으로 보고되었다. 이 연구는 저지(Jersey) 와 홀스타인(Holstein) 우유의 가우다 치즈(Gouda cheese)가 만성 스트레스(CUMS, chronic unpredictable mild stress)에 미치는 영향을 조사했다. 치즈를 먹인 만성 스트레스 마우스 모델의 개선적 변화는 젖소 종에 관계없이 통계적으로 유의미하게 효과적으로 나타났다. 흥미롭게도 PCR을 통한 분변 미생물 균총 분석에서 저지 치즈를 섭취함으로써 Bacteroidetes가 증가하고 Firmicutes가 유의적으로 감소하는 것으로 나타났다. 종합하면, 본 연구는 치즈 섭취가 스트레스 개선 작용이 있음을 제시하며, 특히 장내 미생물 균총의 유익한 방향으로의 변화가 관찰되는데, 치즈의 생리활성물질 혹은 장내미생물 균총의 대사물질들이 이러한 행동·정신학적 개선 작용과의 연관성이 있음을 시사한다.

• Annual Conference of KIPS
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• 2000.04a
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• pp.723-728
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• 2000

소프트웨어 프로세서 개선(SPI)의 목적은 조직의 소프트웨어 프로세서 능력을 향상시키는데 있다. SPICE 표준의 기본 목표는 소프트웨어 프로세서 개선과 능력수준의 결정이며 적용대상 범위로 ISO 12207에 근거한 프로세스 계획, 관리, 실행, 통제 및 개선에 두고 있다. 본 논문에서는 SPICE 모형의 심사모형 및 참조모형을 분석하고 능력수준과 프로세스들간의 관련성을 조사 하였다. 또한 기존의 SPI모델 CMM과의 비교를 통하여 SPICE에 장점과 향후 방향을 예측하였다.

• Journal of KIISE:Software and Applications
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• v.33 no.1
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• pp.95-104
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• 2006

The Gradient Vector Flow (GVF) snake or active contour model offers the best performance for image segmentation. However, there are problems in classical snake models such as the limited capture range and the slow progress into concavity. This paper presents a new method for enhancing the performance of the GVF snake model by extending the external force fields from the neighboring fields and using a modified smoothing method to regularize them. The results on a simulated U-shaped image showed that the proposed method has larger capture range and makes it possible for the contour to progress into concavity more quickly compared with the conventional GVF snake model.

• Journal of the Korea Society of Computer and Information
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• v.10 no.6 s.38
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• pp.167-176
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• 2005

The software architecture is an essential part of a software-intensive system. In addition, the architecture evaluation is a very important process and a cheap way to avoid a software disaster. This article introduces a new method to evaluate architecture by maturity levels. Maturity Models which are about software and software process, have gained wide scale acceptance over the last decade. We are applying these techniques to the software architecture and propose SW(Software Architecture Maturity appraisal Model). SAMM consists of six-levels. We expect that our maturity model SAMM describe the requirements that any architecture must have in order to improve its software architecture design and constitute a proven architecture within which to manage the improvement efforts. We can reduce our effort to design architecture, have a guideline to construct the high qualify architecture with SAMM, and evaluate architecture and make architecture level.

• Proceedings of the Korean Information Science Society Conference
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• 2011.06a
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• pp.1-4
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• 2011

본 논문은 현재 국방 체계의 상호운용성 수준을 평가하는 방법으로 사용하는 LISI 모델에 대해 개선되어야 할 내용을 제시한다. 우리 군은 국방 체계에 대해 상호운용성 수준 측정을 위해 LISI를 기반으로 한 자동화 도구를 활용하는 등 상호운용성 확보를 위해 많은 노력을 기울이고 있다. 그러나 소요제기/개념단계, 설계 단계에서 적용되는 LISI 모델에는 미흡한 점이 있다. 이를 극복하기 위해 본 논문에서는 아키텍처 구축 시 LISI를 적용하는 방법에 대해 제안한다. 상호운용성이 확보 가능한 아키텍처를 구축하기 위해 서는 LISI를 기반으로 아키텍처 대안들을 평가함으로써 향후 개발에 적용될 아키텍처가 상호운용성 요구를 달성하고 있음을 검증해야 한다. 더불어 본 논문은 LISI 모델 기반 상호운용성 평가를 위해 주요하게 고려되는 능력모델에 대한 절차(P), 응용(A), 기반구조(I), 데이터(D) 내용을 참조모델을 통해 최신화하는 방안에 대해 제안한다.

• The Transactions of the Korean Institute of Power Electronics
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• v.14 no.3
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• pp.188-196
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• 2009

Due to its high power density, long cycle life and clean nature supercapacitors are widely used for improving the dynamic characteristics of the new and renewable energy sources and extending the battery run-time and life. In this paper improved dynamic model of the supercapacitor is developed by the electrochemical impedance spectroscopy technique. The developed model can be used to accurately estimate the dynamic behaviour of the supercapacitor and calculate the exact capacitance value at a certain state of charges. The model of the supercapacitor in the frequency domain is equivalently transformed into that in the time domain for Matlab/Simulink simulaton. The simulation data shows fine agreements with experimental results, thereby proving the validity and the accuracy of the developed model.

• The KIPS Transactions:PartD
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• v.17D no.2
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• pp.111-118
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• 2010

In this paper, we describe the implementation of debugger that has advanced features for verifying Simulink model. The debugger provided in Simulink has some boring and repetitive work when verifying complicated Simulink models or complicated scenarios. In order to resolve the problems, this paper addresses the issues on the implementation of debugger that provides features such as a convenient feature to compare the simulation output to the expected output for specific input, to monitor system's behavior at specific time, and coverage report function in some or all input scenarios. The proposed debugger is applied to the vending machine model provided by Matlab, demonstrating its feasibility.

• Journal of Korea Game Society
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• v.20 no.6
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• pp.31-42
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• 2020

To accept more than thousands of concurrent players, MMO Game servers should use high performance I/O APIs provided by the OS. Despite the continuous improvement of the I/O models, these new I/O APIs are not applied on the applications immediately. In this study, we proposed a new MMO game server architecture using io_uring, Linux's new I/O model. We implemented the proposed architecture and achieved performance improvements of the server on a stress test benchmark with high concurrent connections.