• Journal of the Korean Society for information Management
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• v.26 no.3
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• pp.89-110
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• 2009

In this research, we attempt to discuss about the subject reference service from a marketing point of view, especially from a perspective of customer relationship management(CRM), and examine how this service actually functions to build the relationships with users of academic libraries, especially with faculty members. To carry out the research, a focus group interview was conducted with subject specialists, and also individual in-depth interviews with faculty members. In addition, we also discuss about characteristics of subject specialists which affect the relationship with the faculty members in a college environment. This study is meaningful as it discussed purposes of and characteristics in subject reference service from user' viewpoint and the perspective of CRM.

• Proceedings of the Korea Contents Association Conference
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• 2004.11a
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• pp.558-563
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• 2004

We develop a method to simulate diverse actions for a virtual world consisting of numerous interrelated objects. We focus on how to efficiently model those countless actions rather realistic representation of each action. To this end, those actions are structured into hierarchies according to their characteristic parameters so actions can be efficiently added based on inheritance. The first key issue in this model is how to extract commonality among actions and identify their idiosyncrasy. The second issue is how to reify or substantiate inheritance of the actions. We apply the developed model to the walk actions of quadruped, and their simulated results are shown in articulated figures.

• Journal of Advanced Navigation Technology
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• v.15 no.1
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• pp.104-111
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• 2011

In this study, I have tried to analyze an influence of R&D investment on ROV(Real Option Value), corporate value and market value by analyzing R&D investment, ROV, corporate value and market value of machine and material industry in the perspective of ex post. As a result of this study, corporate value, which has been deduced by real option according to R&D investment, reflects market value well and possesses a strong correlation with R&D investment, ROV, corporate value and market value. This implication demonstrates this study result is corresponding with existing theories.

• Journal of Korean Society of Archives and Records Management
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• v.12 no.1
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• pp.95-115
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• 2012

The purpose of this study is to analyze the 7 principles of ISO 30300 and the requirements of ISO 30301 to provide the conceptual frame of MSR for various organizations providing a comprehensive understanding of the standard series. To achieve the aim of this study, we analyzed the relationship between 'ISO/FDIS 30300 MSR-Fundamentals and Vocabulary' and 'ISO/FDIS 30301 MSR- Requirements' using the Matrix Diagram approach. The results show that there exist some level of relationships between principles and requirement either directly or indirectly, however, 'Process approach' principle seems the closest relationship among them.

• Tunnel and Underground Space
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• v.16 no.6 s.65
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• pp.476-485
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• 2006

During blasting, both shock wave and gas are generated in detonation process of explosives and the generated wave and gas expansion may create new fractures and damage rock mass. In order to explain and understand completely the fracture mechanism by blasting, we have to consider both effects of the wave and gas expansion simultaneously. In this study, we use a discrete element code, PFC2D and develop an algorithm which is capable of modeling both detonation and gas pressures acting on blasthole wall and visualizing generated cracks within rock mass. Moreover, the gas-pressure modeling method which applies a corresponding external force of gas pressure to parent particles of radial fractures is adopted to simulate a coopting between rock mass and gas penetrating created radial fractures. The developed algorithm is verified by reproducing numerical simulations of a lab-scale test blast successfully.

• Journal of Korean Society of Steel Construction
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• v.13 no.2
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• pp.153-162
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• 2001

A direct design method of three-dimensional frames using practical advanced analysis is presented. In this method. separate member capacity checks encompassed by the code specifications are not required. because the stability of separate members and the structure as a whole can be rigorously treated in determining the maximum strength of the structures. Advanced analysis accounts for geometric and material nonlinearities. The geometric nonlinearlity is considered by the use of stability function. The material nonlinearity is accounted for using CRC tangent modulus and parabolic function. The load-displacements predicted by the proposed analysis compare well with those given by other approaches. A design example has been presented for a 22-story frame. The analysis results show that the proposed method is suitable for adoption in practice.

• Journal of the Korean Geotechnical Society
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• v.32 no.12
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• pp.33-43
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• 2016

In order to analyze ground relaxation and cavity formation mechanism due to deteriorated sewer pipe, field test was carried out and a numerical assessments were compared with the field test results. An artificial underground cavity was intended using the ice block overlaying the buried pipe and confirmed that the cavity and relaxation of the surrounding ground were gradually formed as the ice block starts to melt down. Such mechanism was highly suspected to be involved with soil particle interlocking as a soil compaction was a typical process for the buried pipes. In exploring such mechanism numerically, commercially available DEM (Discrete Element Method) code PFC2D was used and the interlocking induced cavern behaviors were successfully simulated and compared with field test results by utilizing the clump logic imbedded in PFC code.

• Journal of The Korean Association of Information Education
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• v.20 no.2
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• pp.151-160
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• 2016

Algorithm education is emphasized as an instrument for teaching the basic principles of Computer Science. But these materials is very short-fall. We'll present the CS Unplugged-based algorithm contents, which is easy to learn for elementary student. These contents for self-directed learning consisted of the activity-based learning. For problem-solving algorithm learning in everyday life we were developed the hashing techniques on the basis of the basic searching and sorting algorithms. For checking the adequacy of these materials were tested by surveys of teacher professional groups, and we obtain the appropriate conclusions for sorting algorithm contents for improving the problem-solving ability for in elementary student.

• Communications of Mathematical Education
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• v.18 no.2 s.19
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• pp.371-382
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• 2004

Kamii는 피아제의 발생론적 인식론이란 이론을 모태로 수학을 지도해야 학습자가 수학을 이해를 바탕으로 학습할 수 있다는 믿음을 지니고 있다. 본고에서는 Kamii가 이런 신념을 갖고 실시한 수업을 녹화한 비디오 자료에 나타나는 특징을 분석하였다. 첫 번째 특징은, 교사가 가르쳐야 할 지식을 직접적으로 지도하지 않는 대신에 학습자가 스스로 지식을 구성할 수 있도록 매개자의 역할을 한다는 점이다. 두번째, 기저지식으로서 학습자의 비형식적 지식을 학습자가 적극적으로 활용할 수 있도록 허용하는 분위기이다. 세 번째, 두 번째와 관련되어서 학습자의 사고과정은 성인이나 학문적 체계에서 운용되고 있는 사고 흐름과는 다르다는 것을 인정해 준다. 네 번째, 교사의 역할이 가르쳐야 할 지식을 가르치는데(전수하는데) 있는 것이 아니라 학습자들이 생성해 낸 여물지 않은 아이디어들을 익힐 수 있도록 환경을 조성하는데 있다. 다섯 번째, 학습자마다 기저지식이 다르기 때문에 동일한 학습주제라 할지라도 이해의 폭과 깊이가 다르다. 따라서, 전체학급을 대상으로 하는 수업 중이라 할지라도 개별적 학습을 염두에 두어야 한다. 학생들의 수학적 이해력이 저하된다는 염려의 목소리가 높아지고 있다. 이는 학생들이 이해를 바탕으로 한 수업을 받아 보지 못하기 때문이며, 이런 원인은 아마도 교사 자신이 이해를 바탕으로 한 수업 경험이 간접적으로든 직접적으로든 없기 때문일 것이다. Kamii가 실시한 수업이 학생 스스로 수학을 학습할 수 있다는 구성주의 원리를 적용한 성공적인 사례이며, 이와 같은 방향으로의 교수법의 변화가 있기를 기대한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.13 no.6
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• pp.462-469
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• 1988

Choromatic dispersion of single mode optical fibers limits the maximum bit rate in the single mode optical transmission systems. In this paper we calculate chromatic dispersion and dispersion parametes(zero dispersion wavelength, dispersion slope) for concatenated single mode optical fibers form the chromatic dispersion and dispersion parameters of individual single mode optical fibers, and compare theoretical valuse with those measrued by double demodulation method. Calculated values are coincident with measured ones reasonably. The standard deviation is 0.77-1.28nm for zero dispersion wavelength and 0.56-0.75PS/km.nm2 for dispersion slope. The standard deviation of zero dispersion wavelength is inverse proportional to the optical fiber lenght.