• Title, Summary, Keyword: Shelter

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A Study on Heat-transfer Characteristics the Shelter by Solar-heat Radiant (쉘터의 태양열 복사에 의한 열전달 특성에 관한 연구)

  • Shim, Dong-Hyouk;Noh, Kyung-Ho;Park, Jin-Yong;Lim, Young-Taek
    • Journal of the Korea Society for Simulation
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    • v.27 no.2
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    • pp.25-33
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    • 2018
  • When developing military equipment, it should be designed considering the temperature condition so that the operator can operate in a stable environment. The shelter for storing various military equipments is operated in various environments. The storage temperature and operating requirements of the test equipment and repair accessories shall be $-32^{\circ}C$ to $50^{\circ}C$ and the inside of the shelter shall be designed to meet the storage temperature and operating requirements. In this study, thermal analysis of a 2.5 ton military shelter operating under high temperature and solar heat conditions is performed considering MIL-STD-810G. The thermal analysis was applied by using the concept of heat resistance and heat circuit, and the solar thermal test was performed on the actually manufactured military shelter in order to verify the analysis results.

Exploring American Indian Students' Problem-Solving Propensity in the Context of Culturally Relevant STEM Topics (문화 반영적 융합교육(STEM) 주제 상황에서 미국 토착민 학생들의 문제 해결 성향에 대한 탐색)

  • Kim, Young-Rae;Nam, Youn-Kyeong
    • Journal of the Korean Society of Earth Science Education
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    • v.10 no.1
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    • pp.1-16
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    • 2017
  • This study presents an out-of-school problem-solving lesson we designed for American Indian students using a culturally relevant STEM topic. The lesson was titled "Shelter Design for Severe Weather Conditions." This shelter design lesson was developed based on an engineering design allowing us to integrate STEM topics within a traditional indigenous house-building context. This problem context was used to encourage students to apply their prior knowledge, experience, and community/cultural practice to solve problems. We implemented the lesson at a summer program on an American Indian reservation. Using the lesson, this study explores how American Indian students use cultural knowledge and experience to solve a STEM problem. We collected student data through pre- and post-STEM content knowledge tests, drawings and explanations of shelter models on the students' group worksheets, and classroom observations. We used interpretive and inductive methods to analyze the data. This study demonstrates that our culturally relevant, STEM problem-solving lesson helped the American Indian students solve a complex, real-world problem. This study examines how students' prior experiences and cultural knowledge affect their problem-solving strategies. Our findings have implications for further research on designing problem-solving lessons with culturally relevant STEM topics for students from historically marginalized populations.

The present situation of shelter and case study of stone cultural heritage (석조문화재 보호각 현황과 사례연구)

  • Shin, Eun-Jeong;Kim, Sa-Dug;Eom, Doo-Sung
    • 보존과학연구
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    • pp.103-120
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    • 2010
  • Most of the important stone cultural heritage (National treasures and Treasures) in Korea are mainly located outdoor and considerably affected by the changes of the temperature, humidity and rainfalls. 541 of the stone cultural heritage are preserved as National treasure and Treasure. The pagodas occupy 187 remains and next 127 Buddha statues, 68 monuments, 60 stupas, and the others 74 stone cultural heritages. The shelter has been installed for one pagoda, 60 Buddha statues, 36 monuments and two stupas. The shelters are categorized in three shapes as traditional shape, modern shape, and others (tradition+modern). Approximately 100 of shelters that have constructed in traditional ways, and about nine of shelters have modern ways, and the only one has the combination shape of tradition and modern, which has been constructed since mid 1900s and repaired from the 1980s~2000s. Many researchers are studying for improvement of manners such as repairing, remodeling or removing of the shelter because problems have occured on shelters. Architectural form of traditional style of Korean timber building is respected, but it has problems on importing natural sunlight to the inside as well as ventilation and spacial problems. However, it needs to supplement policies to improve the positive roles of shelters such as prevention of artificial damage, blocking acid rain, and so on. For instance, the rock-carved Buddha Triad in Seosan, it had problems with viewing, contamination, and dew condensation on the surface. These problems decreased after dismantling the shelter, the space was made for improvement of viewing and dew condensation, and moisture problems were in better conditions. The velocity wind is an important factor in drying conditions on the surface of the rock, therefore the condition has improved after dismantling the shelter.

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GIS Based Analysis for the Capacity of Emergency Evacuation Shelters in Cheonan - Focused on Class-2 Shelters in Old Downtown (GIS를 활용한 천안지역 대피시설의 현황 및 수용능력 분석 -구도심지역의 2등급 대피시설을 중심으로)

  • Lee, Heewon;Sung, Min-Ho
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.14 no.9
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    • pp.4572-4579
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    • 2013
  • South Korea people and government pour growing interest on emergency evacuation shelters due to recent threatening of North Korea provocation. However, survey says the border area suffers lack of 278 shelters compared to population, needless to say the lack of class-2 shelter in case of provocation. Firstly, this study visualized the evacuation buffer area and summarized acceptable population for all class (1~4) shelters in Cheoan neighbor(dong). Specifically, for the class-2 shelter coverage in old downtown neighbor (Sungjung-dong, Jungang-dong, Munsung-dong), this study calculated evacuation excluded population and deficient shelter area through GIS buffer analysis. As a result, the old downtown needs $25,546m^2$ shelter area more that can accommodate 56%(30,657man) of the population.

A Study on Status Survey for the Improvement of Shelter Facilities for Residents (주민대피시설의 성능개선을 위한 실태조사에 관한 연구)

  • Park, Namkwun;Kang, Shinwook
    • Journal of the Society of Disaster Information
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    • v.10 no.1
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    • pp.91-97
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    • 2014
  • purpose of this study was to conduct status survey on existing shelter facilities for residents and use it as basic material to plan and design improved shelter facilities in the future. As the result, first, although existing shelter facilities are judged to have been designed in consideration only of the protection from high explosive shells, actual protection capability is significantly low against high explosive shells when exit direction and protection capabilities of main entrances were investigated. Second, all the 7 facilities did not have air purifier with filters installed for the air that flows into the inside from outside and since the height of air exhausts and intake pipes in the outside are also close to the earth, there are possibilities that heavy contaminated air can flow into the inside. Third, although some facilities have anti-explosion doors installed, it is impossible to use them as chemical, biological and radiological (CBR) shelter because of improper installation of openings and anti-explosion valves as well as poor plumbing that cannot ensure air-tightness and poor finish of piping penetration.

Effect of Different Substrates in the Rearing Tank on Growth and Body Composition of Juvenile Sea cucumber Apostichopus japonicus (사육수조 내 사육기질이 어린 해삼의 성장 및 체조성에 미치는 영향)

  • Seo, Joo-Young;Kim, Dong-Gyu;Kim, Guen-Up;Cho, Sung-Su;Park, Heum-Gi;Lee, Sang-Min
    • Journal of Aquaculture
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    • v.22 no.1
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    • pp.118-121
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    • 2009
  • This experiment was conducted to evaluate the effects of different substrates in rearing tank on growth and body composition of juvenile sea cucumber Apostichophus japonicus. Sea cucumber (average weight 3.6) were randomly distributed at a density of 10 juvenile per tank into nine tanks providing three different substrates including free-substrates, sand and wave-shaped plastic sheet as (shelter). Juveniles were fed with a commercial feed once in every 2 days for 8 weeks. At the end of the experiment, survival of sea cucumber was not affected by the presence of substrates (P>0.05). Weight gain and specific growth rate of sea cucumber reared in the tanks with sand were significantly higher than those of sea cucumber reared in the tanks with shelter and without substrate (P<0.05). Crude protein and crude lipid of whole body in sea cucumber reared in free-substrate tanks were significantly higher than those of juvenile reared in the tanks with other substrates (P<0.05). Higher ash content was obtained in sea cucumber reared in the tanks with sand compared to that of juvenile reared in the tanks with other substrates (P<0.05). The results of this study suggest that growth and proximate composition of whole body of sea cucumber was significantly affected by substrates. Among materials tested, sand may be a proper substrate for sea cucumber culture.

Temperature Changes under Plastic Film Rain Shelter Using Different Concentration of Shading Paint in Vineyard (차광도포제 처리에 의한 포도 비가림 시설 하부 온도의 변화)

  • Jung, Sung Min;Hur, Youn Young;Im, Dong Jun;Chung, Kyung Ho
    • Protected Horticulture and Plant Factory
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    • v.28 no.4
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    • pp.328-334
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    • 2019
  • Shading paint (water-soluble) is one of the temperature control agents inside of a greenhouse in summer. Plastic film rain shelter is a unique system in Korean, prevents disease development vineyards, but it causes the heat inside a shelter in summer. Shading paint treatment with different shading rates (15, 25, and 35%) outside of plastic rain shelter avoided excessive heat inside. Shading paint influenced sunlight under plastic rain shelter in a different manner at each treatment. 35% of shading paint treatment reduced 45% of PPFD (Photosynthesis Photon Flux Density) than non-treatment control. Shading paint had the significance of efficiency to reduce the temperature under plastic rain shelter. 35% of shading paint treatment reduced $2^{\circ}C$ of bunch temperature than non-treatment control. However, shading paint treatment had not to control lower than ambient temperature. 35% of shading paint treatment is available to prevent excessive heat damage and poor fruit quality under plastic film rain shelter in summer in Korean vineyards.

Characteristics of the Newly Developed Rain Shelter for Grapevine and Growth of 'Campbell Early' (신개발 포도 비가림 시설의 특성과 '캠벌얼리'의 생육)

  • Lee, Yun Sang;Kim, Seung Deok;Lee, Seok Ho;Hong, Seong Taek;Lee, Jae Wung;Hong, Eui Yon;Kim, Dae Il
    • Protected Horticulture and Plant Factory
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    • v.24 no.3
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    • pp.252-257
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    • 2015
  • Fruit cracking and vine leaf spot of grapes tend to occur when the plants were directly exposed to rain under outdoor culture. Rain shelter facility can be an alternative method to prevent the cracking and disease of grape, but it also has some limitations in practical usages. We designed rain shelter facility which can completely shut out the rain and ventilate naturally, and it was upgraded to meet the standards of disaster prevention against snow and wind load. The newly developed rain shelter has two-story roof structure, and the $2^{nd}$ floor roof was equipped over $1^{st}$ floor roof at a distance of 40cm. For natural ventilation and water proof, the upper roof protruded about 50cm from the ridge of a $1^{st}$ floor roof. The various tests were carried to examine such as grape quality, brown spot and fruit cracking of Campbell Early under the conventional and the newly developed rain shelter facility which was built about $100{\ss}{\check{S}}$. In comparison of temperature between the conventional and the newly developed rain shelter facility when outside temperature was more than $34^{\circ}C$, the inside temperature was recorded as $40.7^{\circ}C$ and $37.4^{\circ}C$, respectively. There was no significant difference between the two facilities when outside was below $32^{\circ}C$ The quality such as soluble solids and marketable fruit was increased, and fruit cracking of grapes and vine leaf spot also drastically diminished in the newly developed rain shelter.