• Proceedings of the Korean Geotechical Society Conference
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• 2010.09a
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• pp.960-963
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• 2010

In recent days, the development project for industry or housing complex at west coast of Korea is on an increasing trend. the design of soft ground is necessarily required. So, the evaluation of consolidation characteristics for soft ground is very important in design and construction. Especially, the correct evaluation of preconsolidation pressure or OCR for given soft ground is essential at the west coast that has a large tidal range, since it affects the settlement of soft ground. In this study, various methods determining preconsolidation pressure were carried out to investigate the application of each method. The preconsolidation pressure that evaluated from the results of conventional consolidation tests on the songsan clay were compared.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.11a
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• pp.442-447
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• 2008

With the advances in the high-tech knowledge and service industries, along with a high-flying economy, the industrial structures of many cities have changed. The subject of the successful cases of dimensional integrated complexes in Roppongi Hills, the actions and preferences of these complexes'users were surveyed and analyzed in this study to determine the factors that contribute to the success or failure of such development projects. The results of the survey that was conducted in this study regarding the satisfaction of the residents of Roppongi Hills with such complexes will be considered in the formulation of a construction plan and will be used as base data for designing a large-scale dimensional integrated complex in Korea.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2011.11a
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• pp.153-154
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• 2011

In Korea, the apartment supplier should satisfy the apartment residents' demand on the defect repair found in apartment housing by the law of Management of Apartment Complexs. But in the cost of defect repair, not only the actual defect repair cost, but also the cost of residents' complains are contained. So in this analytic study, the actual use state of defect deposite during 4~10 years after moving in are analysed base on actual data of 15 apartment complexes. In this study, about 66% of defect repair deposites are used to actual defect repair and only 34% of defect repair cost are spent to satisfy the demand of apartment residents'.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 2003.04a
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• pp.441-447
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• 2003

In the study, we described on the 3D solid model be made on the AutoCAD haved an effect on the deviation of form as RP manufactures the facetres. The STL file improved the deviation of form as the facetres value but the deviation of form have the difference a little as the RP system. In result, we ruled the correlation with the 3D solid model and the RP sample manufacturing, with manufacture RP sample according to facetres value in complex shape. And we developed the program which recombination the STL file that we make use of the AutoLISP.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.11a
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• pp.312-318
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• 2001

This paper suggests the finite element method to analyze the dynamic characteristics of a rotating HDD system including the supporting structure with general shape. The flexible supporting structure was modeled by tetrahedra elements to produce a finite element model of disk-spindle-shaft-housing system and the dynamic characteristics of the HDD system was investigated due to the change of rotating speed. The validity of the presented method was verified by the modal testing. The supporting structure has an crucial effect on lower modes for HDD system, so that it is required to consider the supporting structure to accurately analyze the dynamic characteristics of HDD system.

• Journal of Families and Better Life
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• v.20 no.5
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• pp.69-85
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• 2002

The purpose of this study was to develop a scheme to standardize apartment management expenses levy. I have conducted theoretical research on the literature for the foundation of this study. I have also surveyed many different kinds of levies with help from several apartment complex managers in Busan as well as the executive secretaries of Busan Citizen's Coalition for Economic Justice. I held 30 meetings with the experts in this process to discuss the standardization of the levy. The finalized scheme for standardization is in line with the Act for Management of Multiple Family Housing. Because description of the whole standardized scheme is too lengthy for one article, I decided to present it in three parts. This article is the first part of the series. The remaining two parts will be published in future issues.

• Journal of Urban Science
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• v.9 no.1
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• pp.33-40
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• 2020

This research aims to analyze the determinants of apartment rents in the Seoul Metropolitan area using spatial econometrics approaches. Since spatial econometrics approaches have advantages to solve limitations of ordinary multiple regression such as spatial dependence and spatial heterogeneity. This research includes structural variables such as number of rooms and baths, neighborhood variables such as number of housing units in the apartment complex, and location variables including distances to subway stations, to traditional markets, to educational institutes, and to urban services such as parks, etc. The result shows that the accessibilities to the CBD, to subcenters, to subway station, to school, and to parks contribute to apartment rent uplift and also shows different spatial variations in rent premiums by accessibility variables. In particular, apartments located south of Han river along the Lines 2, 3, 7 and 9 have the highest rent premiums due to the accessibility to the subway.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2008.04a
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• pp.177-180
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• 2008

The purpose of this study is to analyze the characteristics of landscape for historical areas in Italy and suggest a planning directions and consideration points for historic landscape in residential complex. This study is consisted of four areas as followings: The first part, as a theoretical study, reviews the research method of this study. The second part, the concept of historic cultural landscape and its scope. The third part, focalizes the characteristics of landscape management and concept of the historic area. The last part, as a field planning, analyses the characteristics of urban landscape planning and architecture. The result of analytical reviews is synthesized and used to suggest the major strategies and guidances for the future landscape in terms of physical, socio-cultural, and institutional aspects under consideration of Korean situations.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.24 no.11
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• pp.799-805
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• 2012

In this study, structural thermal analyses for steam trap valve considering contact boundary condition have been conducted for high temperature and pressure conditions using nonlinear finite element method. Full steam trap model also including regulator and housing structures is considered in order to accurately simulate the complex valve mechanism and investigate thermal stress levels, and structural behaviors of core structural parts. It is typically shown that the present computational approach can give very useful results for design engineers so that the operating performance and structural safety of the steam trap valve can be verified in the design process.

• Journal of Environmental Science International
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• v.12 no.10
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• pp.1101-1108
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• 2003

We studied the relationship between a civil affair occurrence of bad smell and meteorological conditions around Seongseo district for recent 2 years. The results were as follows; (1) The civil affair occurrence days of bad smell were concentrated from May to August. (2) Daily mean temperatures were mostly 20∼28$^{\circ}C$ and daily mean relative humidities were 60∼80%. (3) Wind speeds were mostly less than 2㎧(75%), and wind directions were southerly winds(50%). It was hardly occurred for relatively well-ventilated conditions in cases of wind speeds 2㎧ over. And the Lagrangian particle dispersion model were used to figure out the transport route in a civil affair occurrence days of bad smell. It was found that the south-western winds transported the bad smelling materials from Jungni-dong(the place of source) to the housing complex located along a piedmont district.