• Journal of Microbiology and Biotechnology
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• v.17 no.10
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• pp.1622-1628
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• 2007

We characterized the efficacy of an electrostatic precipitator (ESP) air-cleaner in reducing the concentration of Serratia marcescens in an enclosed space. We used an experimental room ($4.5{\times}3{\times}2.9\;m$) in which electrostatic air-cleaners were located. Two air-cleaners enhanced the equivalent ventilation rates in the chamber by about 3.3 air changes per hour (ACH) over the 2 ACH provided by the mechanical ventilation system. Natural die-off of the organisms provided an additional equivalent of 3 ACH, so that the total ventilation rate with the ESP air-ccleaners was 8.3 ACH. We also examined whether the ESP air-cleaners altered the deposition of Serratia marcescens aerosols on the experimental room surfaces. We did not find any significant differences in the number of colony forming units recovered from surfaces with and without the air-cleaners. We installed UV lights inside the ESPs and determined if UV light, in addition to electrical fields, increased the efficacy of the ESPs. The presence of UV light inside the ESP reduced S. marcescens aerosols by approximately 2 ACH. Finally, a box model indicates that the efficiency of the air-cleaner increases for both biological and nonbiological particles at ventilation rates of 0.2-1, which are typical for residential settings.

• KIEAE Journal
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• v.10 no.3
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• pp.51-56
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• 2010

The sound insulation performance is one of the important factor that determined the amenity of housing life in residential building. Especially, Apartment house represents a korea habitation. So the importance of privacy and noise problems between habitable rooms are emphasized in these habitation. This study investigates and find a problem of sound insulation performance of partition wall of the apartment house in current state. The measurements were carried out in apartment house with and without a stair hall. And the measurements also carried out in current state and installing a sound absorbing material in receiving room and changing a front door and installing a inner door. In spite of the same partition wall, difference results were showed according to the stair hall. It is appeared that sound insulation performance without stair hall is 6-7dB(Dw) higher than that with stair hall. In case of without stair hall, sound insulation performance is Dw 49 for single number quantity for airbone sound. And In case of changing a front door and installing a inner door sound insulation performance is Dw 57 for single number quantity for airbone sound. The Results of measuring on the changes a front door and installed a inner door indicated that the flanking sound through front door influenced the sound insulation performance.

• Journal of Korean Society of Rural Planning
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• v.15 no.2
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• pp.27-42
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• 2009

This study has intended to evaluate the subjective landscape of rural region using additive integration index calculation model in Seondong region, Gochang-gun, Jeollabuk-do, Korea. This study consists of the following three steps. First, this study defmed the rural landscape using survey and developed the estimating equation for rural landscape assessment index. Second, this study set up assessment units and assessment indicators, then estimated mean of representative landscape adjectives in accordance with them through residents-participatory evaluation. Third, this study calculated rural landscape assessment index using additive integration index calculation model, and evaluated subjective landscape of rural region in accordance with space types and landscape fields through mapping methodology. The results of this study can be described as follows: 1) satisfaction level for landscape in accordance with village (urban area and residential area) was very high; 2) satisfaction level was very high in both Ye-Jeon reservoir and Hakwon farm, representative landscape resources of the study area.

• Journal of the Korean housing association
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• v.23 no.5
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• pp.103-111
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• 2012

This study empirically investigates the degree of physical exclusiveness of multi-family housing estates and its socioeconomic effects. By combining various physical elements devised to blockade and control the entrance to the estate as well as housing units, it constructs the index to quantify the degree of physical exclusiveness for the multi-family housing estates of more than 300 households in Seoul. The statistics reveal that the degree of physical exclusiveness has increased over time and therefore, as a representative example, two-thirds of the estates are now equipped with barricade at the entrance, which often symbolizes 'gated community'. The estimation result of hedonic price model show that physical exclusiveness has a significant positive effect on housing price. The household survey data for the case study estates also demonstrate that the residents in the estate of higher degree of physical exclusiveness put a higher housing value on socioeconomic 'prestige' as well as 'community', beyond physical 'security', and have closer neighborhood relationship with the residents inside the estate. However, there is no significant difference in neighborhood relationship with the outside residents depending upon the degree of physical exclusiveness.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.43-48
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• 2004

The purpose of this study is to analyze the typological characteristics of super high-rise housings in Hong Kong. The results are as follows; 1) The Plan types of the residential building in Hong Kong are mostly tower types and they show lots of curves on the external resident blocks so each resident families can face maximum open air. 2)Household arrangements or resident families form are shown as symmetrical and systematic type of structures that centers around the core. 3)The core types are mostly central core types and a portion of central core is planned to place void and alight garden for improving the lighting and ventilating problems. 4)If we review our room arrangements, they are arranged from entrance kitchen, livingroom bedroom to bathroom to the end. Livingrooms and dinning rooms are normally formed together. 5)If external resident blocks are facing the open air, one of the surface is on view axis, kitchen or bathroom are symmetrically located on the other side which faces the units for the purpose of ventilating.

• Journal of the Korean Society of Safety
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• v.29 no.2
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• pp.31-37
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• 2014

For the vibration control of residential buildings, a multiple type slim damper system is developed and dynamic performance test is performed in this study. In conventional damping systems, larger installation space is required in order to achieve acceptable seismic performance, and as a result, it is difficult to determine efficient damping capacity of the device. The proposed damping device is composed of several small slim type dampers and linkage units. It can control damping capacity easily by changing the number of the small damper. To evaluate the proposed damping device, three slim type dampers (single-type, triple-type and penta-type) are designed and manufactured in real scale. Dynamic loading tests are performed by using the three manufactured dampers. From the tests, it is shown that damping coefficient is proportional to the number of the damper combined. Thus, test results validates the practicality of the proposed slim type dampers. applying nonlinear curve fitting technique, numerical model of the dampers are developed and presented.

• KIEAE Journal
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• v.17 no.3
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• pp.23-34
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• 2017

Purpose: The purpose of this study is to explore the relationship between suburban waterfront und urban regeneration strategies. Specifically, This paper investigates how urban design strategies for suburban waterfront has been conceptualized and realized in a case-based research study of the regeneration of suburban waterfront in Berlin, Germany. Since Germany's reunification, Berlin was faced a wide variety of challenges and has been transformed into a new capital city. First of all, Wasserstadt Berlin-Oberhavel was a key development task for the urban regeneration in Berlin. The Wasserstadt Berlin-Oberhavel project with over 207 hectares will provide new residential urban areas, office spaces, educational facilities and cultural facilities. In details, 3,640 apartments with 12,700 units and around 4,800 jobs will be created. Method: The study consists of five sections. The first and second section are divided into two stages:"waterfront definition in urban design" and "urban design strategy in waterfront". The third section explores the waterfront development process of Wasserstadt Berlin-Oberhavel. The fourth section aims to investigate the strategies for urban regeneration as well as waterfront development. Finally, the fifth provides some of the key policy challenges for Urban Regeneration in suburban waterfront area. Result: The results showed that urban regeneration strategies in suburban waterfront have a substantial impact on all two dimensions: relationship between waterfront and urban context, relationship between waterfront and natural environment.

• Journal of the Korean Regional Science Association
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• v.6 no.1
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• pp.39-55
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• 1990

The principal measure of housing demand is income and the preferences expressed by households through their respective indifference curves. In this context, housing essentially becomes a derived demand, i.e., the household consumes land and a location (or distance-in time and money costs), according to its relative preferences for space, accessibility, and all other nonhousing goods. This paper attempts to deal with both aspects of housing (apartment) demand and household mobility in the Seoul Metropolitan Areas. Housing services will be measured using hedonic regression technique. From observations on the market prices of dwelling units and on the underlying characteristics of housing, one can estimte the relationships between the two empirically. In predicting the probability of the future moves into new towns in the Seoul Metropolitan areas, the best predictors of the future moves into new best predictors are found to be the degree of satisfaction not only with the current residence as a whole, but with some of the major amenities, accessibility and child education. The reasons for moving into new towns are diverse depending on the households' current situation; the most frequently cited is "improvement of housing conditions," followed by "improvement of living environment," "asset improvement" and "home ownership". It appears that people move houses because of a dissatisfaction with their current housing status, relative their income or needs, or a desire to improve their housing and neighborhood amenities, or both. On the other hand, it is clear that the development of new towns in the Seoul Metropolitan Areas should be based on the analysis of housing demand and the pattern of household mobility in Seoul housing market.sehold mobility in Seoul housing market.

• Land and Housing Review
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• v.11 no.2
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• pp.75-86
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• 2020

As the urban regeneration project and the old housing maintenance project are actively progressing in Korea, small-scale building construction is being carried out in downtown areas. Small buildings in the downtown area are constructed on about 4 to 10 floors, and since they are carried out in small units in residential areas, it is difficult to enter large equipment to construct existing piles, and it is more vulnerable to complaints about noise and vibration. in this study, helical piles suitable for urban areas or small sites where it is difficult to enter large equipment, such as noise and vibration. Reliability analysis was performed on the results of the static load tests and dynamic load tests conducted at the LH site and the bearing capacity calculated by the hydrostatic method and the empirical formula (N value). As a result of comparing and analyzing the design formula and the results of static load test and dynamic load tests, the correlation between the design formula of the bored pile (Road bridge design standard) formula using N value and the design formula by the modified Davisson method frequently used by method commonly European helical file practitioners.

• Journal of the Korean housing association
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• v.20 no.6
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• pp.31-38
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• 2009

The purpose of this study is to investigate remodelling that meets the characteristics, intention and needs of antiquated apartment in Gwangju. For this study, firstly, we observed the current status and residents of old-aged apartments and attempted interview. Secondly, we used ethnographical interview of participating and observation methods based on cultural anthropology. The needed for this study was obtained by the questionnaires with 273 answer sheet. The data analyzing method was the statistic program SPSS. This study targeted more than 10-year-old seven apartment complexes which had above 10 stories. In respect of other needs of remodelling, it was very difficult to obtain uniform remodeling on which the whole residents agreed. As old-aged apartment could not be remodelled uniformly, remodeling types should be specified according to different complexes, buildings and units. Joint plans should be prepared for buildings or common space according to different steps of aging before joint remodelling and houses should be individually or jointly remodelled after joint plan is prepared. Current apartment remodelling is designed to increase economic values, but remodelling is more necessary for the residents with low-income. So, financial burden should be minimized and gradually remodelling apartment for improvement of residential environment is to be preferred.