• International Journal of Control, Automation, and Systems
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• v.5 no.4
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• pp.471-478
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• 2007

In this paper, an optimal Wiener-Hopf decoupling controller formula is obtained which is expressed in terms of rational matrices, thereby readily allowing the use of state-space algorithms. To this end, the characterization formula for the class of all realizable decoupling controller is formulated in terms of rational functions. The class of all stabilizing and decoupling controllers is parametrized via the free diagonal matrices and the optimal decoupling controller is determined from these free matrices.

• Journal of the Korean Mathematical Society
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• v.42 no.5
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• pp.1031-1056
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• 2005

In this paper, we define the conditional first variation over Wiener paths in abstract Wiener space and investigate its properties. Using these properties, we also investigate relationships among first variation, conditional first variation, Fourier-Feynman transform and conditional Fourier-Feynman transforms of functions in a Banach algebra which is equivalent to the Fresnel class. Finally, we provide another method evaluating the Fourier-Feynman transform for the product of a function in the Banach algebra with n linear factors.

• Honam Mathematical Journal
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• v.38 no.3
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• pp.495-506
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• 2016

In this paper, we introduce and investigate a new subclass of meromorphic functions associated with a certain integral operator on Hilbert space. For this class, we obtain several properties like the coefficient inequality, extreme points, radii of close-to-convexity, starlikeness and meromorphically convexity and integral transformation. Further, it is shown that this class is closed under convex linear combination.

• Journal of the Korean housing association
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• v.1 no.1
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• pp.103-111
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• 1990

This study has researched on the utilization of living space through interview with a owner of the MAN-CHUI-DANC. The aim of the study is to grasp-the resident living and dwelling ceremony through rites of passase of the MAN-CHUI-DANG among the upper class residence of Korean traditional house A result of this study , Korean traditional house have been so inhered multipurpositive and adaptability that dwelling living space for the rites of passage is always separation, transition, coordination as living aspect.

• Honam Mathematical Journal
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• v.35 no.2
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• pp.147-161
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• 2013

In this paper we determine certain class of $n$-dimensional QR-submanifolds of maximal QR-dimension isometrically immersed in a quaternionic space form, that is, a quaternionic K$\ddot{a}$hler manifold of constant Q-sectional curvature under the conditions (3.1) concerning with the second fundamental form and the induced almost contact 3-structure.

• Journal of the Korean Mathematical Society
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• v.38 no.2
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• pp.485-501
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• 2001

In this paper we express analytic Feynman integral of the first variation of a functional F in terms of analytic Feynman integral of the product F with a linear factor and obtain an integration by parts formula of the analytic Feynman integral of functionals on abstract Wiener space. We find the Fourier-Feynman transform for the product of functionals in the Fresnel class F(B) with n linear factors.

• Journal of the Korean housing association
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• v.22 no.1
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• pp.95-104
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• 2011

The drawings that currently possessing by the Jangseogak Library, The Academy of Korean Studies is the material which were drawn the figure of house in Seoul (Hanseong-bu), during from the middle part of 17th Century to the end of 19th Century. Since these drawings were drawn in the form of Gangado (間架圖), the layout and floor plan, the function of room of each houses can be examined. Focusing on drawings on which the room name was written among those drawings, this Study has researched about the scale and space composition by each domains of the upper-class housing in Seoul, during the latter part of the Joseon Dynasty. Based on the originals, all of the drawings were redrawn using AutoCAD 2008, and the scale of site and building, the occupying area by domains were also analyzed, compared. As the result, it was investigated that the most part of upper-class housing in Seoul had far exceeded over the control limitation about the site size and the building scale in accordance with the status. Furthermore, in this Study, by means of concretely research on the space and room composition of each ranges of the upper-class housing in Seoul, it was quite examinable on the architectural figure of the upper-class housing in Seoul, During the latter part of the Joseon Dynasty, which was not known well in the meanwhile.

• Korean Journal of Mathematics
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• v.9 no.2
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• pp.133-147
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• 2001

In this paper, we introduce the concepts of multiple $L_p$ analytic Fourier-Feynman transform ($1{\leq}p$ < ${\infty})$ and a convolution product of functionals on abstract Wiener space and verify the existence of the multiple $L_p$ analytic Fourier-Feynman transform for functionls in the Fresnel class. Moreover, we verify that the Fresnel class is closed under the $L_p$ analytic Fourier-Feynman transformation and the convolution product, respectively. And we establish some relationships among the multiple $L_p$ analytic Fourier-Feynman transform and the convolution product on the Fresnel class.

• Journal of Aerospace System Engineering
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• v.9 no.1
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• pp.1-6
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• 2015

A critical speed analysis of oxidizer pump was peformed for a 7 ton class liquid rocket engine as the third stage engine of the Korea Space Launch Vehicle II. Based on the previously developed experimental 30 ton class turbopump and presently developing 75 ton class turbopump for the first and second stage rocket engine of Korea Space Launch Vehicle II, a layout and configuration of the 7 ton class turbopump rotor assembly are determined. A ball bearing stiffness analysis and rotordynamic analysis are performed for both of the bearing unloaded condition and loaded condition. Structural flexibility of the oxidizer pump casing is also included to predict critical speeds. From the numerical analysis, it is confirmed that the rotor system acquires sufficient separate margin of critical speed as a sub-critical rotor even though decrease of critical speed due to the casing structural flexibility.

• Journal of the Korean Institute of Educational Facilities
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• v.14 no.2
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• pp.25-34
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• 2007

This study analyzed the type of the teaming space of 84 elementary schools which were prized as excellent schools on architectural planning and design in Japan from 1985 to 2005. As a result of the study, more types of learning space appeared at different elementary schools, and there was a tendency to plan as one unit space which include class room, multipurpose space, and others, on the planning of learning space. They intended to be uses for the teaming and living activity as a group of a school year.