• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2004.11a
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• pp.1024-1027
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• 2004

수원 삼성전자 DM연구소(R4) 신축동 6층 옥상에 위치한 냉각탑으로 인해 인근 연구실 및 사무실에 소음 전파 우려가 있어 이에 대한 소음영향 평가를 수행하고 대책을 수립하고자 한다. 이를 위해 연구실에 대한 소음기준을 설정하고 음향해석기법을 이용하여 방음대책 수립 전 후에 대한 소음영향 평가를 수행하였으며, 냉각탑 소음을 줄이기 위한 방음대책안을 제시하였다.

• The Journal of the Convergence on Culture Technology
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• v.6 no.4
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• pp.331-337
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• 2020

The study analyzes the appropriate number of people per a household by applying an evacuation simulation to a 27-floor apartment in accordance with the NFPA 101 standard. The results of the analysis are as follows. First, if there are three people residing in each household, there would be 156 households in total, of which 85.25% were evacuated within 5 minutes. Second, 208 households with 4 residents were evacuated within 5 minutes. Third, if there are five people residing in each household, there would be a total of 260 households and 71.92% of residents were evacuated within 5 minutes. Lastly, 62.82% of the 312 households, each consisting of 6 people, were evacuated within 5 minutes. Measures to reduce evacuation time include determining the width of the stairs according to the number of people indoors, the number of floors in the building, the slope of stairs, and the users' characteristics, the design reflecting the ventilation conditions of the stairs, the installment of outdoor evacuation stairs, two-way stairs, evacuation lift, and the installation of an evacuation safety zone for people to evacuate outside of the building in the middle floors. In addition, measures, such as the mandatory installation of automatic emergency door open-close device to the rooftop, are required to facilitate rooftop evacuation.

• Journal of the Society of Disaster Information
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• v.16 no.1
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• pp.44-59
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• 2020

This study analyzed a gas explosion accident. A gas smell from a underground coffee shop in the two-story building was reported to 119. A fire brigade was turned out, turned off the main valve of LPG gas cylinder on the roof, and checked the turning off of middle valve in the coffee shop. The fire brigade required a gas supplier and gas installer who arrived at the spot to take safety actions. Gas explosion occurred seven minutes after the fire brigade was withdrawn and two people died and 21 people were injured. A court decided that because the causes for gas explosion were not found, compensation responsibility could not be charged with the gas supplier, the gas installer, or Korea Gas Safety Corporation. In this reason, the court judged that only the fire brigade who was withdrawn without taking safety actions shall compensate victims or bereaved families. Therefore, fire brigades who turn out after a 119 report of a gas leak should take safety actions such as escaping people or preventing people's access and ventilating and be withdrawn when there is no possibility of fire or explosion.

• KIPS Transactions on Computer and Communication Systems
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• v.5 no.7
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• pp.159-172
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• 2016

This paper presents a novel algorithm for searching evacuation paths in indoor disaster environments. The proposed method significantly improves the time complexity to find the paths to the evacuation exit by introducing a light-weight Disaster Evacuation Graph (DEG) for a building in terms of the size of the graph. With the DEG, the method also considers load balancing and bottleneck capacity of the paths to the evacuation exit simultaneously. The behavior of the algorithm consists of two phases: horizontal tiering (HT) and vertical tiering (VT). The HT phase finds a possible optimal path from anywhere of a specific floor to the evacuation stairs of the floor. Thus, after finishing the HT phases of all floors in parallel the VT phase begins to integrate all results from the previous HT phases to determine a evacuation path from anywhere of a floor to the safety zone of the building that could be the entrance or the roof of the building. It should be noted that the path produced by the algorithm. And, in order to define the range of graph to process, tiering scheme is used. In order to test the performance of the method, computing times and evacuation times are compared to the existing path searching algorithms. The result shows the proposed method is better than the existing algorithms in terms of the computing time and evacuation time. It is useful in a large-scale building to find the evacuation routes for evacuees quickly.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2007.05a
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• pp.128-131
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• 2007

난간의 각 구성요소는 설치장소 및 용도에 따라 여러 설치 관련규정에 의해서 규제되어 있는데 이 규정은 난간의 높이에 대한 규정으로, 이러한 규제된 난간의 요소 중 하나인 난간 높이와 실지 소비자들이 느끼는 심리적 안정성이 일치하는가에 대한 여부는 여전히 의문으로 남아있다. 건물의 옥상에 설치된 난간에 대해서 난간의 높이가 아닌 다른 어떠한 구성요소가 실지로 소비자들에게 조형적 안정감을 주는지에 대한 부분은 연구가 상당히 미흡하다고 생각한다. 본 연구는 부산에 위치한 초등학교를 대상으로 4층 이상의 고층구조물에 설치되어 있는 난간을 범주로 하여 설문조사를 실시하고, 난간이 설치되어 있는 현장에서는 EKG(심전도 테스트)를 시행, 사용자들이 기존에 인지하고 있는 난간에 대한 느낌과 현장에서 실제로 느끼는 조형적 측면의 심리적 안정감 및 다른 요소를 분석하여 사용자가 안정감을 가질 수 있는 난간디자인에 필요한 구성요소를 발견하는 것이 본 연구의 목적이다. 또한 기존에 사용하고 있는 난간 설치의 규정의 정당성 여부를 고찰 및 재조명하여 사용자의 심리적 안정성을 충족시키는 가에 대한 자료 제시를 목적으로 한다.

• Journal of the Korean Society of Environmental Restoration Technology
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• v.3 no.4
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• pp.11-21
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• 2000

This study was aimed to establish different drainage types of soil media on the plant growing in rooftop. For this study, experiment plots were installed on the roof of Social Science building, Chongju University, from April, 1998 to September, 1999. (1) Sand and sandy loam as base and check soils, (2) vermiculite as a inorganic soil media (3) "humus sawdust" and "burned rice hull" as organic soil media were used by various mixing ratio Zoysia japonica, was selected for the experiment. The results of this study are as follows : L5B3S2 and L5H3S2 of bad drainage character with a plastic drainage plate combination caused good growth effect on Zoysia japonica examined in 3 types of drainage layer with 5 types of soil media. From this result, it could be suggested that combined design of plastic drainage plate with 2 soil types - L5B3S2 and L5H3S2 - be desirable composition for regarding weight load and plant growth.

• Journal of Bio-Environment Control
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• v.20 no.2
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• pp.162-168
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• 2011

This study was carried out to investigate the plant growth of several Carex L. plants according to light intensity and soil depth planted on a green wall and roof, and to show basic data for the use of Carex L. plants in various forms. The temperature was dropt more in the green container compared to the normal especially during the genial weather from August to September. The plant growth of Carex testaceae, Carex oshimensis Evergold, and Carex ciliatomarginata Nakai was excellent at light intensity from 0 to $1799\;{\mu}M{\cdot}m^{-2}{\cdot}s^{-1}$, and that of Carex siderosticta Hance, Carex flagellifera Bronzita, Carex ornithopoda Variegata, and Carex morrowii Ice Dance were best in lower light intensity from 0 to $786\;{\mu}M{\cdot}m^{-2}{\cdot}s^{-1}$. The leaf color of the plants changed vividly as the light intensity grew lower and the visible value of the plants increased. There must be more considerations about the pattern changes in additory experiments. The water content in the soil depth of 10 cm was maintained higher than the other treatments because of no drainage layer. Most Carex L. plants grew excellent in the soil depth of 10 cm. However, Carex oshimensis Evergold, Carex siderosticta Hance, and Carex testaceae showed the best plant growth in soil depth 20 cm, and Carex morrowii Ice Dance and Carex ciliatomarginata Nakai in soil depth of 40 cm. Therefore, Carex L. plants could be recommended as materials for green roof because they also grew well in light soil depth of 10~20 cm.

• Journal of Wetlands Research
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• v.14 no.4
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• pp.657-665
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• 2012

The development projects distort the natural water circulation system and increase the non-point source pollution by changing the natural cover type. The low impact development (LID) techniques are considering as new development approach to decrease the ecological- and hydrological impacts from high imperviousness rate. The high imperviousness rate is because of the construction of building, parking lot and road for human activities. Knowing the basic characteristics of rood runoff can give the direction for setting up the water management strategy. The monitoring results show the pollutant EMCs of roof runoff are 3~13 times lower than EMCs of the road and parking lot. The pollutant sources from roof runoff are mainly from leafs, cigarette butts, atmospheric deposition and materials of the roof. The EMC is occurred around 15minutes later after starting runoff and more than 8 storm events are needed to have the average EMCs.

• Journal of the Korean Society of Clothing and Textiles
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• v.17 no.4
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• pp.587-601
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• 1993

In the order to grasp their physical characteristics stemming from activity amount, this paper has divided elderly women into the following group ; those with high activity in the past, those with low activity in the present, those with high activity in the present and those with low activity in the present. The analyses of the body measurements and the pie chart, and the classification of back shapes by taking photographs have led to the following results. 1. The items of depth and girth among the body measurements were significant in the past and the present activity. Those with high activity in the past had smaller sizes in depth and girth than those with low activity. 2. From the pie chart, it was shown that those with high activity in the past had smaller sizes in every index as well as in girth than those with low activity in the past. Both those with low activity in the present and those with medium activity in the present had somewhat large sizes in waist girth, bust girth, hip girth and abdominal girth and in the indices of these items. 3. The classification of back shapes by taking photograpes has shown that those with high activity in the past had the less bent body type-42 percent of Type A and 6.5 percent of Type D. Among those with medium activity in the present, Type A was most outstanding and Type C and Type D were less, This fact shows that those with medium activity in the present keep the most normal body type. This proves that the medium activity of elderly women is desirable for keeping the normal body type.

• Journal of the Korea Institute of Building Construction
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• v.15 no.4
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• pp.391-396
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• 2015

The demands about eco friendly space are increased as buildings are denser in downtown, and green system on the roof and the artificial ground are widely being applied. The construction of green system applies a waterproof layer, a root barrier and a protection concrete layer. Assembly of these many layers leads to a long construction term, and cause many defects. This study is to evaluate one layer-hybrid sheet which gets waterproof and root barrier performance simultaneously, which is developed to use in the new green system. As results, the performances of physical properties, durability, waterproof and root barrier not only exceeded quality standards but also showed excellent durability. In addition, mock-up test would be proceed to certify long term performance.