• Proceedings of the Korean Information Science Society Conference
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• 2004.10b
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• pp.496-498
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• 2004

소규모 단위의 프로젝트이지만 안정성과 정확성을 중요시하는 제약 시스템 개발 프로세스에 대한 제반 문제들을 보완하기 위해서 시스템 개발 위험도를 최대한 낮추고 품질을 향상시키는데 적합한 반복적 개발 방법을 기반으로 프로젝트의 복잡도, 영역 속성의 측정 결과 값에 따라 프로세스 테일러링 할 수 있도록 개발된 세계적 제약회사 Merck ＆amp; Co., Inc.의 프로세스 테일러링에 대한 표준 가이드라인을 제시한다. 실제 소규모 단위 시스템 개발에 프로세스 테일러링을 적용한 프로젝트와 적용하지 않은 프로젝트간의 성과 결과 측정을 통해 프로세스 테일러링 적용을 통한 시스템의 안전성과 정확성이 향상된 사례를 검증하고 있다.

• School Mathematics
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• v.16 no.2
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• pp.317-334
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• 2014

The purpose of this study is to grasp pre-service secondary teachers' understanding-realities for Taylor series convergence conceptions and to examine a teaching way using GeoGebra based on the understanding-realities. In this study, most pre-service teachers have abilities to calculate the Taylor series and radius of convergence, but they are vulnerable to conceptual problems which give meaning of the equality between a given function and its Taylor series at any point. Also they have some weakness in determining the change of radius of convergence according to the change of Taylor series' center. To improve their weakness, we explore a teaching way using dynamic and CAS functionality of GeoGebra. This study is expected to improve the pedagogical content knowledge of pre-service secondary mathematics teachers for infinite series treated in high school mathematics.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.40 no.1
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• pp.9-19
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• 2016

This study investigated the variations of Taylor flow and particle residence time in a Taylor reactor according to the changes of angular velocity and inlet velocity using computational fluid dynamics technique. The results showed that the fluid in a reactor became unstable with an increase of angular velocity. The flow moved to the regions of CCF, TVF, WVF and MWVF resulting in an increase of Reynolds number. Accordingly, the flow characteristics were different for each regions. We confirmed that the inlet velocity influences the Taylor flow. The particle residence time and standard deviation increased with an increase of angular velocity and a decrease of inlet velocity.

• Journal of KIISE:Software and Applications
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• v.33 no.2
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• pp.201-219
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• 2006

The key to developing software with the lowest cost and highest quality is to implement or fit the software development process into a given environment. Generally, applying commercial or standard software development processes on a specific project can cause too much overhead if there is no effort to customize the given generic processes. Even though the customizing activities are done before starting the project, these activities are thoroughly dependent on the process engineers who have abundant experience and knowledge with tailoring processes. Owing to this dependence on human knowledge, it has been very difficult to explain the rationale for the results of process tailoring and it takes a long time to get the customized process that is applicable. Hence, we suggest a process tailoring method which adopts the artificial neural network based teaming theory to reduce the time consumed by process tailoring. Furthermore, we suggest the feedback loop mechanism to get higher accuracy in the neural network designed for the process tailoring. It can be done by reusing the process tailoring data results and determining its appropriateness level as sample data to the neural network. We proved the effectiveness of our process tailoring method through case studies using real historical data, which yielded abundant process tailoring results as sample data.

• KDI Journal of Economic Policy
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• v.29 no.2
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• pp.135-157
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• 2007

The goal of this paper is to examine the validity of nonlinear Taylor rules in Korea. To perform our tests, we utilize new IV ECM threshold cointegration tests that are invariant to nuisance parameters. The new tests have a standard chi-square distribution and the same critical values can be used throughout. This is in contrast to OLS ECM threshold cointegration tests, which depend on nuisance parameters and have nonstandard distributions. After finding significant support for nonlinear cointegration, we find that the Bank of Korea raises the call rate of interest only when inflation is above a threshold rate. We additionally find that the Bank of Korea increases the call rate of interest to possibly counter domestic currency deprecation only when the rate of currency deprecation exceeds a threshold.

• The Transactions of the Korea Information Processing Society
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• v.5 no.5
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• pp.1345-1356
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• 1998

Prolog tailoring technique, an optimization method to improve the execution speed of a procedure, is proposed in this paper. When a procedure is frequently and repeatedly called and the machine has a lot of callee-saved registers, optimizing prolog and epilog can become an important step of optimization. Epilg tailoring supported by IBM XL C Compiler has been known to improve procedure's execution speed by reducing register restore instructions on execution paths, but no algorithms for prolog tailoring has been proposed yet. The prolog generated by the prolog tailoring algorithm proposed in this paper executes considerably smaller number of register save instructions at run-time. This means the total number of instructions to be executed is decreased resulting in an improvement on the procedure's execution speed. To maintain the correctness of code, prolog code should not be inserted inside diamond structures of loop structures. This paper proposes a prolog tailoring technique which generates register save instructions at the best position in a control flow graph while not allowing the insertion of any prolog code inside diamond structures of loop structures.

• Proceedings of the Korea Information Processing Society Conference
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• 2015.04a
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• pp.611-614
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• 2015

IT 환경이 점차 융 복합화가 되어가면서 소프트웨어 개발 업체들은 다양해진 소프트웨어 개발 영역에 맞춰 소프트웨어 프로세스를 신속하게 적용하는 데 어려움을 겪고 있다. 이와 같은 문제를 해결하고자 본 논문에서는 소프트웨어 개발 업체들이 구축해 놓은 소프트웨어 프로세스 자산을 재사용해 특정 소프트웨어 개발 프로젝트에 적용할 소프트웨어 프로세스를 효율적으로 수립할 수 있는 체계적인 소프트웨어 프로세스 테일러링 절차를 제시한다. 제시한 소프트웨어 프로세스 테일러링 절차를 도입하는 소프트웨어 개발 업체는 소프트웨어 개발 영역에 특화된 소프트웨어 프로세스를 빠르게 수립할 수 있게 됨으로써 정의한 소프트웨어 프로세스를 통해 소프트웨어 개발 프로젝트의 위험 요인들을 사전에 인지할 수 있게 되고 소프트웨어 개발 프로젝트가 예측 불가능한 상태로 진행되는 것을 미연에 통제할 수 있게 될 것으로 예상된다.

• Applied Chemistry for Engineering
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• v.28 no.4
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• pp.448-453
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• 2017

We conducted the three-dimensional fluid flow analysis in a Taylor reactor using computational fluid dynamics (CFD). The Taylor flow can be categorized into five regions according to Reynolds number, i.e., circular Couette flow (CCF), Taylor vortex flow (TVF), wavy vortex flow (WVF), modulated wavy vortex flow (MWVF), and turbulent Taylor vortex flow (TTVF), and we investigated the flow characteristics at each region. For each region, the shape, number and length of vortices were different and they influenced on the bypass flow. As a result, the Taylor vortex was found at TVF, WVF, MWVF and TTVF regions. The highest number of Taylor vortex was observed at TVF region, while the lowest at TTVF region. The numerical model was validated by comparing with the experimental data and the simulation results were in good agreement with the experimental data.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.4
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• pp.288-298
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• 2001

Utilizing standards for software process to a specific project requires a tailoring process to meet the development domain. However, the existing tailoring schemes are not systematical and possible to use without analyzing the methodology and development domain. Also, it is not quite easy to apply them to similar projects. This paper includes: 1) systematical tailoring steps and 2) an automatic algOlithm for generating test process based on "a scheme of tailoring process using the component-based development paradigm"; 3) "an automation tool for tailoring, AutoTP" which is derived from XML techniques. Users can generate a tailored test process through our AutoTP automatically without analyzing standards. methodology and domain.

• Journal of Aerospace System Engineering
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• v.12 no.5
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• pp.76-88
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• 2018

Space agencies such as NASA, ESA, and the US military provide guidelines and standards for PA(product assurance) requirements and plans. In recent years, major satellite manufacturers around the world have been mitigating PA requirements and processes by tailoring. PA tailoring has been implemented to improve the cost and schedule efficiency. PA tailoring can be accomplished based on various factors such as mission, classification of mission risk, complexity, development cost, life cycle, etc. In this study, PA tasks according to the mission risk classification proposed by NASA are investigated, and the tailoring method is suggested for the optimization of the development cost and schedule. In particular, the classification of mission risk for the satellites under development or operation in Korea is performed, and PA characteristics in accordance with mission risk are analyzed.