• Korean Institute of Interior Design Journal
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• no.25
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• pp.77-83
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• 2000

This studies is the typological study to classify the characteristics of Floor plan in wooden house that is built in the suburb of Korea through case studies. For this type classification, I took several criteria as follows: number of floors, location of entrance, approach way to inner room, location of step, arrangement way of public space and private space, those are considered as important elements for the determination of Floor plan. Ive got 10 representative types by analysing and synthesizing the relationship between these elements. I expect that these study results would be good materials for the developing new model of wooden houses that is more proper to our life.

• Journal of Astronomy and Space Sciences
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• v.12 no.1
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• pp.143-156
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• 1995

Using a directional antenna, the Doppler effect of satellites can be detected and the orbital elements can be obtained by the Extended Kalman Filter with the observed frequency shift data. We obtained the orbital elements of NOAA-11 by the application of the Extended Kalman Filter type algorithm to the Doppler shift data of NOAA-11d and discussed the accuracy and the credibility of this algorithm.

• Proceedings of the KSRS Conference
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• 2002.10a
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• pp.581-586
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• 2002

The development of 2-D radiometer is a new technical challenge for space borne remote sensing area. The Y-type antenna array has been proposed as a most efficient configuration because a large alias free FOV and a small-synthesized beam-width can be achieved compared to L-, T-type under the fixed antenna spacing. New configuration of antenna array, which is called sub-Y type configuration, is proposed to obtain a higher angular resolution than the case of Y-type array in the paper. The sub-Y type array is consisted of basic arrays, which are the Y-type array of four antenna elements. To analyze characteristics of the proposed configuration, the synthesized beam pattern is simulated through simulation. The secondary effect of the sub-Y-type is that the reconstructed image is suffered from the alias effect is appeared around the real target. The ghost targets in the reconstructed image can be reduced by the alias suppression algorithm introduced in this paper. In conclusion, the performance evaluation by use of array factor simulation shows more than 37.5% improvement in average for angular resolution and almost similar performance for temperature resolution.

• Journal of Astronomy and Space Sciences
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• v.5 no.1
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• pp.45-51
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• 1988

Most of all methods of determining the preliminary orbit of an artificial Earth satellite are reviewed. The preliminary orbits of the methorological satellite NOAA-10 are determined using the studied methods and are compared with mean orbital elements determined at NASA. Through the comparision the preliminary orbital elements determined with Gauss type methods are more approximate to those of NASA than those calculated with Laplacian type ones. Our results indicate that Taff(1984)'s criticism on the Gauss method must be abandoned and Marsden (1985)'s analysis on the method is correct.

• Journal of Astronomy and Space Sciences
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• v.36 no.3
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• pp.115-119
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• 2019

This paper is a part of the series on positron annihilation spectroscopy of two-phase diffuse gas-and-dust aggregates, such as interstellar medium and the young remnants of type II supernovae. The results obtained from prior studies were applied here to detect the relationship between the processes of the annihilation of the K-shell electrons and incident positrons, and the effects of these processes on the optical spectra of their respective atoms. Particular attention was paid to the Doppler broadening of their optical lines. The relationship between the atomic mass of the elements and the Doppler broadening, ${\Delta}{\lambda}_D$ (${\AA}$), of their emission lines as produced in these processes was established. This relationship is also illustrated for isotope sets of light elements, namely $^3_2He$, $^6_3Li$, $^7_3Be$, $^{10}_5B$ and $^{11}_5B$. A direct correlation between the ${\gamma}-line$ luminosity ( $E_{\gamma}=1.022MeV$) and ${\Delta}{\lambda}_D$ (${\AA}$) was proved virtually. Qualitative estimates of the structure of such lines depending on the positron velocity distribution function, f(E), were made. The results are presented in tabular form and can be used to set up the objectives of further studies on active galactic nuclei and young remnants of type II supernovae.

• KIEAE Journal
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• v.8 no.4
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• pp.11-18
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• 2008

This research case-study places are chosen Seoul Metropolitan City and Yong-In City where the distinction characteristics of outdoor spaces are introduced in Apartment Complex. In this study, the standard of waterscape facilities will be set through preliminary researches and detail design factors are prepared for each characteristics. Analyze and research the characteristics of design factors through the field research of places. The Group data from Cluster Analysis, which is about waterscape facilities, is analyzed and classified by types of waterscape facilities in common residence. and then each type of characteristics and representatives of waterscape facilities founded. Waterscape facilities are charactered in 4 main types. I Type is appeared to the natural artificially mountain stream, slope and a rest space type, and feelings type. This type has twenty sites. II Type is appeared to the fewest sites(11 sites). This type is appeared to the Eco-pond, Border planting next to the waterscape facilities. III Type is appeared to the largest sites(28 sites), that is, play style water facilities of no-plantation patterns. IV Type is appeared to the retaining wall type, the rest space of bench type. Research result led, detailed plan element 64 are selected with design elements Seoul Metropolitan City and the Yong-In City at the time of the fact that well is only reflected commonly from external spaces, the type by quality which leads a statistical analysis the type quality was well reflected relatively was judged.

• Journal of the Korean Society of Safety
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• v.21 no.2 s.74
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• pp.143-149
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• 2006

This paper deals with the space-time finite element analysis of two-dimensional vibration problem with a single variable. The method of space-time finite elements enables the simpler solution than the usual finite element analysis with discretization in space only. We present a discretization technique in which finite element approximations are used in time and space simultaneously for a relatively large time period. The weighted residual process is used to formulate a finite element method for a space-time domain. A stability problem is described and some investigations for chosen type of rectangular space-time finite elements are carried out. Instability is caused by a too large time step of successive time steps in the traditional time-dependent problems. It has been shown that the numerical stability of time-stepping on the larger time steps is quite good. The unstructured space-time finite element not only overcomes the shortcomings of the stability in the traditional numerical methods, but it is also endowed with the features of an effective computational technique. Some numerical examples have been presented to illustrate the efficiency of the described method.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2004.05a
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• pp.60-65
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• 2004

This dissertation is focalized on examining research on the actual condition and problem in the exit-space-form of Multiplex Cinema and mutual relation of user and finding more efficient and reasonable project method through valuation of design elements which the user can feel. In result, 4 place which is newly opened after 1990's is analyzed in Seoul. It is researched that Many user feel inconvenience and discomfort when they recognize exit-space. In order to improve itthey want to feel at ease naturally with light-embeded sign and landscape space. The exit-space should be recognized that it is a part of cinema which have to be developed and planed for the inner part of cinema and security of user. Not death-space.

• Proceedings of the Korean Institute of Interior Design Conference
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• 1999.04a
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• pp.122-125
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• 1999

The purpose of this study is to dlassify into types of traditionality reflected in modern Korean houses in 1990's designed by architec Modern houses were divided into five types through qualitative analysis. Analysis is categorized into three parts, space-pl structural elements ornamental elements. Characteristics of each type were defined as 'Indicative expression of the traditionalit', 'Decorative expression of the traditionality', 'Eclectic expression of the traditionality', 'Contemporary expression of the traditionalit', 'Abstract expression of the traditionality'. The results showed that 'Contemporary or Abstract expression of traditionality(type IV and V) were major types of modern Korean houses expressed traditionality. This reveals that in order to apply traditionality to the modern houses, simplifed and sbstracted for were preferred comparing with the direct imitation of traditional forms.

• KIEAE Journal
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• v.5 no.2
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• pp.63-72
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• 2005

The purpose of this study is to investigate the use of Pilotis space in the elementary school and its problems and to explore some improvement scheme. The subjects of this research include the elementary schools in Deajeon, Chungju city which have been established since 1990 when the pilotis first introduced. It would be the effect of the decrease of site area and the increase of total floor area of elementary school. In this situation, this study aimed to figure out the characteristics of pilotis according to their types- Entrance type, Courtyard link type, Hybrid type- throughout the questionnaire, interview, and document analysis. The investigative situation was performed by employing a sample survey of 9 schools whose types were different from each other. The sample survey compared and evaluated scale, location, functions of Pilotis, the physical elements of types, connections with surrounding circumstances and the use under each condition. This study found that the use of pilotis at the elementary schools was inclined to the user, the teachers usually use pilotis only for passage, while the students use it in many ways according to the individual property. Pilotis space represent the differences in satisfaction and utility according to its type. To improve the relationship of users at the pilotis space, Courtyard link type is to be suggested and also it needs enough area as possible. In this way the pilotis type of elementary school gives great effect to the quality and function for better usage of this space.