• Proceedings of the Korea Air Pollution Research Association Conference
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• 2006.04a
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• pp.442-443
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• 2006

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2004.11a
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• pp.203-209
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• 2004

Construction work noise has caused much annoyance for a number of dwellers nearby construction field and has become a very serious issue in our living environment. Therefore, practical solutions for reducing construction work noise are highly required in construction field. Practical solutions for the construction work noise, however, are very difficult because of the poorness of basic data and research. Especially, in order to establish a sound insulation plan about pilings work noise that has highly sound pressure level and impactive, it is necessary to investigate the characteristics of construction noise such as pilings work noise, mechanical operating noise, etc. Accordingly, the aim of this study is to get the basic data about construction noise by SDA(Separated Doughnut Auger) method. And in this study, we attempt to survey the characteristics of attenuation and propagation of construction equipment noise and to estimate the power level in pilings work, using SDA method.

• Korean Institute of Interior Design Journal
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• v.14 no.2 s.49
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• pp.153-160
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• 2005

The purpose of this study was to clarify residential satisfaction of the Living Environment according to responses of staffs in the Horsing Homes. For this, the data about residential satisfaction of the Living Environment of elderly with dementia were taken from the staffs in 2 nursing homes in Tokyo by the questionnaire. Additional information was collected by interviews and observation. It was impossible that the elderly with dementia answered their satisfaction and needs of spaces. For this reason, staffs who care the elderly with dementia during 24 hours and interact with the elderly with dementia were selected the subjects of this survey. Survey question asked for the general features of the staffs, satisfaction, dissatisfactory spaces and the reasons about dissatisfaction of the elderly with dementia. The data were analyzed using the frequency, percentage, crosstab, paired t-test with SPSS 11 program. The result of this study was as follows. First, most of the elderly with dementia were unsatisfied with their bedrooms and bathrooms in bedrooms. Second, the unsatisfied spaces among the living environment were bedroom, bathroom in bedroom, dining room, day corner, special activity room, common bathroom with mechanical bath, and dressing room. The reasons of the unsatisfied spaces were size, comfort, non-existence of the space, and noise in the space.

• The Journal of Korean Physical Therapy
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• v.14 no.4
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• pp.183-203
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• 2002

To know the effect of index of social ability (ISA) and function of social life (FSL) with activities of daily living (ADL) and instrumental activities of daily living (IADL), we carried out a study on the elderly with osteoarthritis daily living in Daegu city for 4 months, from April to July 2002. The followings were observed: 1. The score of functional disability of knee, ADL and ISA were better at lower age (p < 0.01). 2. The younger they are, the better FSL they have. The lower age group has good FSL (p < 0.01). 3. Weight affects more to the under 49Kg group than 50-59Kg group and 60-69Kg group in functional disability of knee, while it doesn't make much difference for the other groups (p > 0.05) and other assessment index doesn't show any relationship with weight. 4. Regarding relat ionship with height , taller group has better knee functions: it's proved by post hock examination that the over 160cm group has much higher knee function than the other groups (p < 0.05). In case of ADL, the over 160cm group and under 149cm group were better than 150$\∼$159cm group. (p < 0.01) . 5. ISA was also different depending on height . It was proved that FSL was the better for the over 160cm group than for the others as a result of post hock examination (p < 0.05). 6. In regard of how many months have passed since the attack of functional disability of knee, knee joint function was better for the 12mon$\∼$36mon group than for the others and the score of ADL was lower for the 12mon$\∼$36mon group than for the others (p < 0.01). ISA was lower for the 12mon$\∼$36mon group and the under 6mon group than for the other groups (p < 0.01). FSL was lower for the 12mon$\∼$36mon group and the under 6mon group than the other groups. (p < 0.01). 7. Comparing left knee with right one, the problem with left knee has lower score of functional disability in all items (p < 0.01). 8. Considering friction noise, knee joint function was slightly better for non-friction noise-group, but it's not statistically significant though. ADL and ISA were better for non-friction noise-group (p < 0.01), while no statistical significance was found in FSL, 9. Knee joint function was better for the group who doesn't have limitation on range of knee flexion motion (p,0.05) but no other difference was found in other items from this group. 10. Limitation on range of knee flexion motion has no statistical difference in ADL and FSL. However, ISA was better for the non-limitation group (p < 0.05) . 11. Knee joint function score has high correlation with ISA (r=0.812, p < 0.01) and FSL (r=0.732, p < 0.01) , which shows the better knee joint function, the higher the score. 12. ISA and FSL were highly correlated: the better ISA, the better FSL (r=0.893, p < 0.01), while ADL has no correlation with either knee joint function or ISA or FSL.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2006.11a
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• pp.262-265
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• 2006

In order to investigate characteristics of floor impact sound generated in the apartment buildings, questionnaire survey was conducted for respondents living in apartments in 200t. Questions in the surrey were on the characteristics of real impact sounds, subjective annoyance and satisfaction on the heavy and light impact sources. From the survey results, it was found that most annoying time of a day and the space were 8 p.m. to midnight at living room. It was also revealed that the main source of the floor impact sound from the upper floor is a child's jumping and running at from six to nine. More than half of people were not satisfied on the floor impact isolation performance of their own apartments. The percentage of residents who were annoyed by the heavy-weight impact sound such as children's jumping and adult's walking was $5{\sim}10%$ lower than by light-weight impact sound. In addition, females being responded more annoyed by floor impact sound than males.

• Transactions of the Korean Society of Machine Tool Engineers
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• v.17 no.6
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• pp.14-22
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• 2008

This study is aimed at suggesting a linear-type diffuser which is excellent in terms of range and elegance like existing diffusers in which amount and direction of wind can be freely controled, out of linear-type diffusers with the highest possibility to be adopted for living space of apartments whose height between floors is not so high and utilizing the linear-type diffuser in design. For the purpose, I examined necessary flow and noise properties of linear-type diffusers. Besides, I evaluated its ventilation capacity for persons in there by applying this in the actual living space. I evaluated features and air blast and found that in time of horizontal and vertical effusion, its T/L ratio is 1-1.5, similar to existing cardioid-type linear diffusers, while in time of slope effusion, it is similar to horizontal effusion in terms of range and it has medium figure in terms of pressure drop and effusion speed, indicating it can provide safe and pleasant indoor environment for persons in there in terms of ventilation.

• Journal of the Korean housing association
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• v.11 no.4
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• pp.65-75
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• 2000

The purpose of this study is to find a better residential plan from the results of apartment residents various forms of stress caused by their neighborhood. The major findings are as follows ; 1) This study finds privacy, noise from children, rules & morality, noise sounds by indoor life, and relationship between neighborhood as 5 main factor of apartment residents stress. 2) This study concludes that the stress caused by neighborhood have similar results by socio-demographis, housing-related, and social-psychological variables. 3) The problems caused by neighborhood noise is very serious ones of apartment residents. This study also finds that neighborhood who have more than average visit feel more stress.

• Proceedings of the KSR Conference
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• 2005.05a
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• pp.516-521
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• 2005

Recently the railway becomes principal transportation on account of the important role in mass transit and commute in urban area. However, rail noise and vibration raise a major problem for the residents living nearby railway track. At that point of view, the effective counterplan for the soundproofing and protection of vibration has to be considered in the process of railway design. Therefore, the reliable computation of load caused by running train on rail is very important to estimate vibration of structure adjacent to railway. In this study, Input identification is used for the calculation of load and vibration, induced by high speed train on rail. The influence of railroad noise and vibration on structure is evaluated using the 3-D Finite element method and the reliability of the evaluation is discussed comparing with the results of the field measurements.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.11a
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• pp.670-673
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• 2005

For the comfortable housing life, an urban environment should give comfort and pleasantness to people living in house and in city. There are lots of environmental conditions in city affecting house and life and most of all the noise pollution have been become factor that makes people's life hard without need to say. Recently researches have been performed to create comfortable urban environment and a study on the evaluation of urban environmental sounds is now undergoing. This study aimed to analyse the subjective characteristics through the subjective evaluation to the sounds measured with physical parameters and eventually to find out evaluation method for urban environmental sounds. Vocabularies applied to previous studies were used for the subjective evaluation and sound sources recorded in specific places were presented with picture at the same time.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.05a
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• pp.308-311
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• 2004

It is reported that there is a limit in increasing heavy-weight impact noise isolation performance of the load bearing wall system apartments to meet the regulation of the Ministry of Construction and Transportation (MOCT). To increase the heavy-weight impact noise isolation performance, improvement in structural systems such as increasing concrete slab thickness and application of rahmen structure were proposed. In this study floor impact sound levels from toil apartments with two rahmen structure multi-story residential buildings were measured before the construction of the buildings finished. Measurements were made at living room and two bedrooms at each apartment when the finishing processes were finished. The average value of light-weight impact sound level from ten apartments was 56dB (L'$\sub$n,Aw/). The heavy-weight impact sound level was 44dB (L'$\sub$i.Fmax.Aw/) and the impact sound level of the impact ball was 41dB(L'$\sub$i.Fmax.Aw/), As a result floor impact noises at the rahmen structure system were lower than the regulation level.