• Journal of the Korean Institute of Rural Architecture
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• v.14 no.2
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• pp.51-58
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• 2012

The purpose of this study was to set and analyze the utilization of the substituted agricultural land in the Dongtan new town in Hwa-seong city. The results of this study were as follows. In the respect of the land efficiency and utilization, the need of the agricultural land in the Dongtan has shrunk. Therefore, the land should be reconsidered and developed as other purposes. The land could be developed as the weekend farm for the city people. The weekend farm is currently gaining popularity because the citizens want to not only experience the nature but also get a healthy food. So, the land in the new town could provide them with a good place. And the Han-ok(Traditional Korean style housing) is recently in the limelight of many people because of its healthy function and the special aesthetic, so the agricultural land of Dongtan could be a great opportunity to develop the Han-ok village. Lastly, the logistics center for agricultural products could be proposed. Because the traffic condition of the new town is satisfactory, the land is idealistic as the logistics center which connect the capital with the local. These practical uses of agricultural land in the Dongtan new town will be able to provide opportunities to improve the quality of life in the area and develop the land more efficiently.

• The Transactions of the Korean Institute of Power Electronics
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• v.17 no.5
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• pp.377-387
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• 2012

A single-phase grid-connected PV system is known as suitable for housing of less than 3 kW. The DC link voltage in a single-phase PV system has necessarily twice component of fundamental wave. It makes high THD in the grid current. According to the problem, power quality is lower. Many engineers have studied about this problem. The most simple method is to use low pass filter on DC link voltage control. However it is affected by DC link voltage control bandwidth. If cutoff frequency is reduced to increase the performance of low pass filter, it also lowers DC link voltage control bandwidth. Second method is using band stop filter, it works good on steady state but not good on transient state. This paper proposes the new method for removing ripple voltage to get an exact current reference. It improves the responses on steady state and transient state. The performance was verified through computer simulation using MATLAB and actual experiments.

• Journal of Animal Environmental Science
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• v.16 no.3
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• pp.181-192
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• 2010

This review was performed to investigate the current researches on the welfare of rearing environments system in farming chicken, including stocking density, perch, housing system and research trend. The investigation indicated that most of the developed countries took much efforts into making appropriate regulations to improve the welfare of rearing environment about broilers and laying hens, particularly more parts in laying hens. Recently the regulations have varied a lot, to be more detailed than before. Moreover, some regulations give valuable suggestions to improve well-being of poultry industry such as additional facilities. Until now it has been known, the quality of the products will improve and the income of producers will increase along with the improvement of welfare. Therefore the relevant agencies and organizations can strengthen the belief of consumers especially the competition is so fierce today. In conclusion, improvement of poultry welfare should be carried out in the real situation and international trends to create the appropriate rules such as professional consulting and training.

• Journal of the Korean Solar Energy Society
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• v.31 no.2
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• pp.128-134
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• 2011

The objective of this study is to analyze the major factors of indoor environment that affect the satisfaction of the occupancy in multi-family residential buildings. The results of this study can contribute to improving the comfort of the residents effectively as they are applied preferentially at the design and construction stages. The indoor environment factors investigated for the analysis included thermal, light, air and the acoustic environment. The individual factors were derived from the 'indoor environment' assessment indices of the green building certificate systems of various countries. Based on these, a questionnaire was prepared to conduct the Post Occupancy Evaluation. The survey results were statistically analyzed.

• Journal of the Korean Institute of Rural Architecture
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• v.23 no.3
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• pp.9-18
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• 2021

This paper conducted a survey of residents and public officials for the projects to make smart-city plans of Geumsan-gun. In introduction, several domestic and foreign cases related to smart-city projects were Investigated. To initiate the smart-city project of Geumsan-gun, the local status of Geumsan-gun was investigated regarding various aspects of natural, social, urban environment and smart-city facilities. The results of this survey are as follows: Overall, more than half of survey respondents said they had satisfaction of their housing quality. Several problems in their residence areas, such as insufficient welfare systems, shortage of parking spaces, industrial infrastructure, were reported. Meanwhile, the survey result indicated that tourism and leisure facilities, health care support systems, industries promote the economy and job market of the area. An interview with public official is also important to select the relevant meaningful projects and regional issues. Three models for each spatial unit were proposed in Geumsan-gun based on the natural, agricultural, and geographical environment. In result, the three smart-city models are categorized as urban type(large area), complex city type(medium area), and smart village type(small area)

• Journal of KIBIM
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• v.11 no.3
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• pp.75-90
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• 2021

A smart home system improves the elderly's quality of life by monitoring and analyzing their movements and health conditions with better health-care and social support services. Therefore, there has been an effort to adopt a smart home system for the independently living elderly. However, to the best of our knowledge, no study has investigated the usability of a smart home system on actual independently living elderly housing in long-term settings. Thus, this study aims to demonstrate the usability of a smart home system on independently living elders in living lab conditions. The BLE smart band and the BLE receiver were chosen for the smart home system to monitor the movement of the participants in their homes as well as to monitor the heart rates, step counts, sleep index. Nine independent living elderly from the senior welfare center in Kimjae participated in this living lab demonstration experiment for ten months. This demonstration experiment confirmed the effectiveness of low-cost and easily adoptable IoT-based BLE sensor sets on independent living elders and discussed the troubles and limitations of the experiment. By grasping the pros and cons of IoT-based BLE sensor sets, this study seeks to improve the accessibility and usability of smart home systems for the elderly population in independent living arrangements.

• Design & Manufacturing
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• v.13 no.2
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• pp.44-48
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• 2019

Motor core products are used as materials for electrical steel sheets and cold-rolled steel sheets according to the performance of motors. The cemented carbide material of the mold punch applied to the motor core material causes many troubles due to abrasion and burr problem. The selection of these materials has a great effect on the production life, mass production, product quality as well as mold life. The cemented carbide applied to the products of the motor core is recognized as a very important part. In this study, cold rolled steel sheet was applied to motor core SCP-1 steel 1.0mm, and The effects of abrasion and punching oil on the shear process were investigated for the selection of cemented carbide. Experiments were conducted to select and apply cemented carbide only for the motor core punch optimized for cold rolled steel. The results showed that the cemented carbide material of $CDK3^{***}$ produced the least wear and burrs.

• Journal of the Korean Wood Science and Technology
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• v.47 no.5
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• pp.607-616
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• 2019

On account of the lack of education of Brazilian worker, this paper analyzed the characteristics of those professionals working in the production sector of timber houses. A sectoral survey was carried out with respective entrepreneurs to investigate the available professionals (career and contract types), evaluate the demands of skilled workers, and indicate solutions to improve the quality of labor qualification. Similarly, over 65% of sampled producers presented both direct-hired and outsourced workforce. For such contract ways, Civil Engineers and Architects were the main careers. Carpenters, Civil Engineers and Architects experienced on timber were the main sectoral demands. Timber Engineers have good potentials of service for this sector. The creation of courses on timber products can emerge as a key alternative to train people.

• Journal of Agricultural Extension & Community Development
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• v.25 no.4
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• pp.211-224
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• 2018

The presence of agricultural and rural society in South Korea has been threatened due to aging as well as depopulation. This study aims to explore the Japanese support scheme for new farmers and the role of local group in new farmers' successful settlement in agricultural and rural society. The case study area is Biratori-cho, Hokkaido, Japan. Firstly, this study identified the systemic support scheme for new farmers of Biratori-cho, which provides with two years' training program, mentoring, rental housing and financial aid. Secondly, we focused on the birth and the supporting role of local group, which is called 'Neo-frontier'. Lastly, we analysed the relationship of new farmers and local residents based on the in-depth interview of 11 new farmers' household. As conclusions, we emphasized the value of quality-based support scheme of local government, unlike the quantity-based policy focused on the number of in-migrants. Also, we discussed the meaning of social network in new farmers' successful settlement in agricultural and rural society.

• Journal of the Architectural Institute of Korea Planning & Design
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• v.36 no.5
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• pp.125-135
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• 2020

The purpose of this study is to identify the background and nature of residential mobility and its influencing factors in Seoul metropolitan area. Spacial range of this study includes from Seoul to Gyeong-in area(Gyeonggi-do and Incheon). To measure this tendency, this study established hypotheses and two logistic regression models through previous researches and conducted an analysis based on 1,911 and 2,923 samples, which experienced inbound and outbound moving between the two areas. This research found that residential mobility from Seoul to Gyeong-in and those moving from Gyeong-in to Seoul had some differences in the household, socio-economic, environmental, and housing characteristics that affected the moving to each area, as well as the architectural and urban environmental characteristics that affect the Quality of Life(QoL) of the households after the residential mobility was completed.