• Proceedings of the Korean Institute of Building Construction Conference
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• 2017.05a
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• pp.146-147
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• 2017

Recently, as the living standards of residents in apartment houses continued to improve, the dispute of post management have also increased. one of the Issue, Concrete Cracks comprised high percentage of dispute. Especially, between criteria the cost of repairing defect and the judgement of defect isn't clear, they are a lot of dispute in this regard. Even though lots of the criteria about Inter-layer crack is existed by judging defects, In a court, they are judging their own criteria about Inter-layer crack. The purpose of this study is to compare and analyze Defect Judement Standard both MOLIT and Court, and to provide the Improvement for Defect Judgement and Repair Method of Inter-layer concrete crack.

• Proceedings of the Korea Concrete Institute Conference
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• 2004.11a
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• pp.141-144
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• 2004

Nowadays, there has been substantial interest in whether there is an association between electromagnetic field exposure and living environment. It is increased the demand that electromagnetic wave environment and its countermeasure. In the present study, we has applied the electromagnetic absorbent inorganic paint of 'I' corporations, and measured electromagnetic waves generated in new apartment before occupancy using the standard field electromagnetic wave generating device we developed. The measurement before occupancy was $100\~131V/m$, but the measurement after occupancy was $6.9\~8.0V/m$ less than 10V/m, the comprehensive electromagnetic wave limit allowed by TCO in Sweden. The implication is that domestic apartment are exposed to extremely poor electromagnetic wave environment. Nevertheless, there have been neither serious efforts to overcome this problem, nor its alternatives and related standards. Therefore, it is necessary to continue research of related fields to establish standards and plans to improve the situation.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.385-388
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• 2005

Finite element method and Taguchi method were used to reduce the floor impact vibration of the reinforced concrete slab in the apartment buildings. At first, experimental results show that sound peak components to influence the rating of floor impact sound insulation were coincident with natural frequencies of the reinforced concrete slab, and there is a high linear relation between floor impact vibration and sound. The tables of orthogonal arrays were used for finite element analysis with 5 factors related to slab shape parameters and its results were analyzed by statistical method. The most effective factor to reduce the floor impact vibration was the length of living/kitchen room and the floor impact vibration was predicted by 30% reduction in the acceleration peak by the optimal design values of the factors.

• Journal of the Korean Institute of Landscape Architecture International Edition
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• no.1
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• pp.33-36
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• 2001

Only do we have an earth! It is crucially important to improve our living environment and keep the sustained development of a city in the limited space. Some concrete examples will be analysized in the paper, elaborating upon how to make full use of roof space and various plants to create a better green-space. To create different activity space with unique characteristics for people, various plants, roof-space, water and buildings in the style of garden should be use when local conditions and design requirement should be considered.

• Journal of the Korean Society of Safety
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• v.24 no.2
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• pp.100-104
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• 2009

In this study, the space gamma dose rates in the apartments structured with concrete were measured in accordance with construction year. In addition, the environmental radiation rates coming from the subway platforms and the road tunnels were analyzed in the equivalent dose by multiplying the absorbed dose with the radiation weighting factors. The space gamma dose rates measured in apartments were higher than those of outdoor which was $0.08{\sim}0.11uSv/h$ in the natural conditions. Especially, the older construction year is, the higher becomes space gamma dose rate. The average gamma dose rates in the subway platforms were measured. In the case of Busan and Daegu subway, the earlier the opening year is, the higher becomes dose rate. However, the dose rates of Seoul subway Lines were high overall, regardless of opening year. Seoul subway Line 6 showed the highest value of 0.21uSv/h. The gamma dose rate in road tunnels was higher than one of the outdoor and increased with opening year like as apartment. In dose rate comparison of the concrete structures with the outdoor, therefore, the space gamma dose rate of indoor is higher than one of the outdoor and the older structures have a higher dose rate.

• The Journal of Korean Association of Computer Education
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• v.13 no.1
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• pp.27-36
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• 2010

Introducing algorithm and programming education to the middle school 'Information' curriculum is appropriate to develop higher thinking skills like problem solving ability and creativity that is the most important ability to the people living in the knowledge and information society. But to providing reduced algorithm and programming contents of higher education increase the cognitive burden on the students in the concrete operational period who is not yet reached to the formal operational period, and moreover transfering principles and strategies learned in the algorithm to the programming for the problem solving is difficult. For this study, student's developmental characteristics in the concrete operational period among cognitive developmental periods was considered, and FAAP(First-Algorithm After-Programming) learning model which can transfer algorithm to programming was developed, and finally the effectiveness of learning motivation and achievement to the concrete operational period's students was verified. Results of the tests showed that learning motivation and achievement of the concrete operational period's students that learned FAAP model were different significantly.

• Journal of Families and Better Life
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• v.30 no.5
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• pp.29-47
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• 2012

The purpose of this research is to identify the everyday life culture, housing satisfaction and housing importance of older Korean-Chinese living in Harbin, China. Social survey research using the questionnaire was conducted from August to October in 2011. A total of 94 usable samples were analyzed by the SPSS version the 18.0 statistical program using frequency, percentage, cross-tabulation, factor analysis, and Pearson's correlation. The major findings were as follows. Firstly, older Chinese in Harbin were assimilated into Chinese culture such as national holidays and respectful people, but acculturated in terms of their daily food, and their preference to live in a Korean-Chinese village. Secondly, they had mainly lived in multi-story houses, the so called Chinese-style apartments. The average size of their living space was $80.33m^2$ and they were usually unsatisfied with their neighbors and floor treatment lacking Ondol(溫突). Thirdly, 5 factors affecting on housing value orientation were 'physical characteristics','emotional characteristics', 'economic characteristics', 'social characteristics', 'neighbor characteristics/reputation of the house' and they explained 73.9%. 2 factors affecting on housing satisfaction were 'inner complex/inner space' and 'neighborhood environment' and they explained 69.4%. In conclusion, some policy is needed for Korean Chinese living in Harbin for their well-being when it comes to their housing needs and conditions. Given the nature of big city, Harbin and its attraction, younger Korean-Chinese tend to be rapidly assimilated into Chinese culture. However older people in Harbin think that it is important for their children to learn both countries' languages and cultures in order to be successful, so some concrete policies and supports are needed.

• Journal of the Korean Recycled Construction Resources Institute
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• v.6 no.4
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• pp.229-235
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• 2018

In this study, recycled aggregate and natural aggregate were mixed in advance using an aggregate mixing facility that was developed to improve the quality of recycled aggregate concrete. Then the mixed aggregate was applied and concrete characteristics before and after a mix were considered. Based on the findings extracted, this study aimed to suggest a new direction for quality stabilization and application activation of recycled aggregate. The test results of change rates of mortars and coarse aggregates in fresh concrete mixed by a concrete mixer, before and after mixing aggregates showed that the variations of the mortars and coarse aggregates in the concrete mixed with the aggregates beforehand were decreased than those in the concrete before mixing them. The variation of compressive strength and the mean compressive strength at the ages of 3 and 7 days showed similar results before and after the aggregates were mixed, and the strength at the age of 28 days before and after mixing them showed larger deviation than that at the ages of 3 and 7 days. The use of the mixed aggregates after mixing aggregates beforehand reduced the variation in strength and is believed that it is advantageous for long-age strength development. The above results show that the variations of coarse aggregates and compressive strength in the concrete using the mixed aggregates produced by mixing recycled aggregates and natural aggregates beforehand are reduced so it will be possible to produce the homogeneous concrete by mixing aggregates beforehand.

• Korean Institute of Interior Design Journal
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• v.18 no.5
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• pp.111-118
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• 2009

Urban houses of traditional Korean Style are a type of habitation that happened during a transitional period when the modernization of habitation had progressed in 1930s, and also a habitation folding societal trails that had adapted and developed into urbanization together with the native traits of traditional Korean Style houses. Because they keep our style of living and the process of change just as they were, it is important work to shed light on and keep a record of it. So, this thesis arranges the contents of research on the actual condition of living, and may try to reason by analogy the changing style of residents' living through the change of space composition and the way of space usage for the urban houses of traditional Korean style that were changed by extension and remodeling of residents. As the concrete matters, it is to grasp the physical and spatial change of urban houses of traditional Korean style in accordance with extension and remodeling, and to analyze in which part and how they had been changing for the spatial composition of urban houses of traditional Korean style according to the change of living style, and especially the change toward a stand-up type of k stand-and the following traits and factors of the change toward Dining-Kitchen. The kitchen changed toward Dining-Kitchen shows some typical discrepancies depending on the location of kitchen as like a case of changing toward Dining-Kitchen from the existing location, a case of extending into the rear side of kitchen, a case of switching of location between kitchen and the inner room, and a case of changing toward Dining-Kitchen from the location of a room across from the main living room. As kitchen changed toward Dining-Kitchen like these, it shows that the connecting trace into the inner room came out, each room came to show a bit clearer function but grow smaller relation with the threshing ground, and also the function of the threshing ground came reduced.

• Journal of the Korean housing association
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• v.10 no.1
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• pp.51-61
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• 1999

Small apartment housings in Korea are dissatisfied due to the growing areas and changing lifestyle of the residents. Many of them currently confronted with slum areas and kinds of housing stock accumulated much more in Korean contexts. An extention of the existing small houses could be an adaptation model to the increasing requirement standards of the house residents. The new model could support diverse identification of the dwelling model in a settlement and many residents could be satisfied with the settlement. This paper deals with the unification typology of two dwelling units to one in order to remodel existing small apartment houses on the 15-pyung areas (N type) constructed by Korea National Housing Corporation in Naju. The proposed type of the merging of the dwellings remove concrete panel walls, make a path through balcony and attach a living areas to the front of the houses in order to make a circulation between the dwellings. A stair hall can be located in-between or inside the merged houses. It can also enhance privacy against conflictive activities in a house and possibly provide space appropriate for three-generation living. It can be devided for the multi-family use. Finally, the merging types of two dwelling units into one can be used as a device to get rid of the monotonous characteristics and gain diversity in the declining stock housing.