• 한국CDE학회논문집
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• 제9권4호
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• pp.294-305
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• 2004

Highly detailed geometric models are rapidly becoming commonplace in computer graphics and other applications. These complex models, which is often represented as complex1 triangle meshes, mainly suffer from the vast memory requirement for real-time manipulation of arbitrary geometric shapes without loss of data. Various techniques have been devised to challenge these problems in views of geometric processing, not a representation scheme. This paper proposes the new mesh structure for the compact representation and the efficient handling of the highly complex models. To verify the compactness and the efficiency, the memory requirement of our representation is first investigated and compared with other existing representations. And then we analyze the time complexity of our data structure by the most critical operation, that is, the enumeration of the so-called one-ring neighborhood of a vertex. Finally, we evaluate some elementary modeling functions such as mesh smoothing, simplification, and subdivision, which is to demonstrate the effectiveness and robustness of our mesh structure in the context of the geometric modeling and processing.

• 한국주거학회논문집
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• 제8권1호
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• pp.77-85
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• 1997

The purpose of this study was to estimate the quality if New Town housing environment, and to present the direction of design policy to elevate it. For this study questionnaires were administrated to 272 homemakers living in apartment in Bundang. From 1st of May to 31st of May in 1995. Used statistical method was Frequency. Percentage. Mean, Factor Analysis, Correlation, Multiple Regression. The major finding is as follows : 1) Housing values were classified into five types : convenience, beauty, sociality, education, and economy, Resident ranked first economy among housing values the second is convenience, the third beauty, the forth education, while the most unimportant value is sociality. 2) House satisfaction was classified into four types : house size and plane structure, environment and facilities, interior decoration materials and facilities and building design. Residents were found to show the middle degree satisfaction on their house. 3) Housing complex satisfaction was ciassified four types : community facilities, management stage, neighborhood connection and complex facilities. Resident showed dissatisfaction on their apartment complex relatively. 4) Residents showed dissatisfaction on the interior decoration materials and facilities, local facilities and management attitude relatively.

• 교육녹색환경연구
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• 제10권3호
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• pp.9-16
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• 2011

As a result of rapid aging speed in our society, many problems related to elderly people have happened in many parts of our society. Among them, supply for elderly facilities is one of the biggest problems. In downtown areas, despit of the high demand for elderly facilities, there is not enough supplement of them due to the lack of real estates. Considering the situations above, this study proposes multi generation complex which combining the school and elderly welfare facility. This combination not only brings financial benefits but also has positive effects on cultural exchanges between generations.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2003년도 추계학술대회
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• pp.1590-1595
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• 2003

Direct drive servovalve(DDV) is a kind of one-stage valve since the rotary motion of DC motor is directly transferred to the linear motion of valve spool through the link. Since the structure of DDV is simple, it is less expensive, more reliable and offers reduced internal leakage and reduced sensitivity to fluid contamination. However, the flow force effect on the spool motion is significant such that it induces large steady-state error in a step response. If the proportional control gain is increased to reduce the steady-state error, the system becomes unstable. In order to satisfy the system design requirements, the lead-lag controller is designed using the complex method that is one kind of constrained direct search method.

• 대한기계학회논문집A
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• 제28권11호
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• pp.1719-1726
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• 2004

Direct drive servovalve(DDV) is a kind of one-stage valve because the main spool valve is directly driven by the DC motor. Since the structure of DDV is simple, it is less expensive, more reliable and offers reduced internal leakage and reduced sensitivity to fluid contamination. However, the flow force effect on the spool motion is significant such that it induces large steady-state error in a step response. If the proportional control gain is increased to reduce the steady-state error, the system becomes unstable. In order to satisfy the system design requirements, the lead-lag controller is designed using the complex method that is one kind of constrained direct search method.

• 제어로봇시스템학회논문지
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• 제13권6호
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• pp.574-580
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• 2007

This paper deals with LQR controller design method tor system having complex poles. The proposed method is capable of systematically calculating weighting matrices based on the pole's moving-range and the relational equation between closed-loop pole(s) and weighting matrices. The method moves complex poles to complex poles or two distinct real poles. This will provide much-needed functionality to apply LQR controller. The example shows the feasibility of the proposed method.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2005년도 춘계학술발표대회 논문집
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• pp.64-68
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• 2005

The aim of this study is to reconstruct neighborhood public space appropriating for the contemporary society. The rapid development of technology has brought a number of changes to society. People's way of thinking has changed and the requirements about space has become more complex. At the urban neighborhood park, although multiple groups of citizens showed various activities, the program and structure of urban park are too fixed to support their activities. Therefore, strategy and flexible devices are needed to activate and stimulate the multi-user's complex activities. Through the case of Hong-Ik children's park, I will analyze the result of investigation about the pattern of space-user and suggest neighborhood public facilities proper to contemporary situation.

• 한국실내디자인학회:학술대회논문집
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• 한국실내디자인학회 2008년도 춘계학술발표대회 논문집
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• pp.236-241
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• 2008

As the population of olds increases, the number of old people with capability increases, and they actively participate to social works with interests in healthy life and leisures. Therefore the demand rises to expand social facilities to support their spare time, while there are limitation, such as land, financial state, to build such facilities. In case of Japan, a solution of such problem occurs by compounding Social facilities for Old people and local facilities in practical and finacial aspect of the selection of site and managing the facilities and social aspect of supporting oppotunities to use various facilities. Such community based complex facilities supports services depending on the health state of Old people locally residing and increases the communication between different generation. The purpose of this research is aimed to analyze programs and space organization of advanced facilities in Japan and provide basical data for planning complex facilities for old people in Korea.

• 통합자연과학논문집
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• 제5권3호
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• pp.157-162
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• 2012

Measurement error is one of main source of error in survey. It is generally defined as the difference between an observed value and an underlying true value. An observed value with error may be expressed as a function of the true value plus error term. In some cases, the measurement error variance may be also a function of the unknown true value. The error variance function can be rewritten as a function of true value multiplied by a scale factor. This research explore methods for estimation of the measurement error variance based on the data from complex sampling design. We consider the case in which the variance of mesurement error is a linear function of unknown true value, and the error variance scale factor is small. We applied our results to the U.S. Third National Health and Nutrition Examination Survey (the U.S. NHANES III) data for empirical analyses, which has replicate measurements for relatively small subset of initial respondents's group.

• 대한임베디드공학회논문지
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• 제6권3호
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• pp.174-182
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• 2011

Conventional home audio system (e.g. AV Receiver, CD Player etc) has a various functionality of audio play, channel mixing, but the remote controller of these audio players is too complex, difficult for user to manage them effectively. Users want to use these functionalities with more easy, comprehensible way. In this study, "intelligent real-sound presentation technology" that support high quality, realistic audio and the "design of complex information and controller of real sound using intelligent real sound play and control interface" will be introduced. So user can actively, realistically enjoy and play real sound based on user's preference, emotion and circumstance, instead of user's passive service.