• 제목/요약/키워드: Air circulation

검색결과 545건 처리시간 0.026초

대도시 젊은이들의 라이프스타일 유형별 외식서비스 인카운터 중요 속성 연구 (The Important Attributes of Foodservice Encounters According to Life-style Types as Offered by Young Metropolitan Customers)

  • 윤혜려;조미숙
    • 한국식품조리과학회지
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    • 제23권3호통권99호
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    • pp.327-336
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    • 2007
  • Life-style factors often include social relationships as well as consumption, entertainment and dress patterns. They also typically reflect an individual's attitudes, values and worldview. Life-style types have become and an important factor for segmenting customer markets ever since significant relationships between life-style and customers' behavior was proven. This study examined the relationships between the life-styles of young customers' and the important attributes of foodservice encounters. Factors analysis with VARIMAX and K-means cluster analysis were conducted to group the subjects by life-style. According to the factors analysis, four underlying dimensions were identified and labeled: (1) 'actively fashioned', (2) 'luxury picky', (3) 'healthy toward', and (4) 'utilitarian leisure'. Based on the factor scores derived from the factors analysis, the K-means cluster analysis classified three groups as statistically significant using ANOVA(p<0.05). The overall mean score for the 3rd cluster 'trendy-active picky' was higher than the other two clusters, and represented very picky attitudes about foodservice attributes. The 3rd cluster also seemed to apply higher standards to all of the foodservice attributes. By order of importance, the most important attributes of the 2nd cluster 'pursue-utilitarian leisure' were food serving time, automation systems, server's hygienes, employee kindness, time in line, and menu variety. In spite of low concerns for the life-style attributes, the first cluster 'passively indifferent' recognized menu variety, food sanitation, food serving time, server's hygiene, menu price, air circulation, and room temperature as important. These results suggest that young diners in Korea could be classified by their diverse life-styles that are represented as trendy, utilitarian, and indifferent and will hopefully contribute to the foodservice industry's ability to segment customer characteristics by different life-styles in Korea.

Numerical Case Study of Heavy Rainfall Occurred in the Central Korean Peninsula on July 26-28, 1996

  • Kim, Young-Ah;Oh, Jai-Ho
    • International Union of Geodesy and Geophysics Korean Journal of Geophysical Research
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    • 제26권1호
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    • pp.15-29
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    • 1998
  • The numerical simulation of heavy precipitation event occurred in the central Korean Peninsula on July 26-28, 1996 was performed using the fine mesh model. ARPS (Advanced Regional Prediction System) developed by the CAPS (Center for Analysis and Prediction of Storms). Usually, the heavy rainfalls occurred at late July in the Korean Peninsula were difficult to predict, and showed very strong rainfall intensity. As results, they caused a great loss of life and property. As it usual, this case was unsuccessful to predict the location of rain band and the precipitation intensity with the coarse-mesh model. The same case was, however, simulated well with fine-mesh storm-scale model, ARPS. Moisture band at 850 hPa appeared along the Changma Front in the area of China through central Korea passed Yellow Sea. Also the low-level jet at 700 hPa existed in the Yellow Sea through central Korea and they together offered favorable condition to induce heavy rainfall in that area. The convective activities developed to a meso-scale convective system were observed at near the Yangtze River and moved to the central Korean Peninsula. Furthermore, the intrusion of warm and moist air, origninated from typhoon, into the Asia Continent might result in heavy rainfall formation through redistribution of moisture and heat. In the vertical circulation, the heavy rainfall was formed between the upper- and low-level jets, especially, the entrance region of the upper-level jet above the exit the region of the low-level jet. The low level convergence, the upper level divergence and the strong vertical wind were organized to the very north of the low level jet and concentrated on tens to hundreds km horizontal distance. These result represent the upper- and low-level jets are one of the most important reasons on the formation of heavy precipitation.

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2009 개정 중학교 기술·가정 교과서 주생활영역의 내용요소 분석 (An Analysis on the Content Elements of Housing Area in Middle School Technology·Home Economics Textbooks by 2009 Revised Curriculum)

  • 조한결;장상옥
    • 한국생활과학회지
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    • 제24권2호
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    • pp.297-325
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    • 2015
  • The purpose of this research is to analyze content elements of Housing area in 2013 middle school Technology Home Economics textbooks 1 and 2, total of 22 according to 2009 revised curriculum. The analysis method was content analysis, focusing on contents of main text, tables & figures, reading material, and activity materials by their content elements. This research will contribute in obtaining suggestion for the post curriculum/textbook development and helping teachers to perform a lesson. The results are as follows. First, Housing area included 1 to 4 content elements per each units, from 2 chapters and 6 units. The content elements stated in Home economics curriculum were total of 16 which consists of 'the meaning of housing,' 'housing types,' 'family forms,' 'family life style cycle,' 'life style,' 'neighboring environment,' 'co-living values,' 'air environment,' 'heat environment,' 'light environment,' 'acoustic environment,' 'space division,' 'circulation', 'effective use of space,' and 'sustainable dwelling practice.' All of these components are dealt with in every textbooks. Second, the numbers of content elements provided in each textbooks were the same, however they showed difference in their contextual aspect. Some contents need supplemental material for their lacking content element. Others need proper understanding of the concept because some showed different contents from the appropriate content elements. Third, repetitions in content elements were observed, the contents of 'co-living values' in textbook 1 and 'sustainable dwelling practice' in textbook 2 were similar in terms of eco-friendly housing, co-housing and universal housing. These two content elements should be merged as one next curriculum, or should be stated together in one subunit.

Eddy-Resolving Simulations for the Asian Marginal Seas and Kuroshio Using Nonlinear Terrain-Following Coordinate Model

  • Song, Y.-Tony;Tang, Tao
    • Journal of the korean society of oceanography
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    • 제37권3호
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    • pp.169-177
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    • 2002
  • An eddy-resolving free-surface primitive-equation model with nonlinear terrain-following coordinates is established to study the exchange of water masses among the Asian marginal seas and their adjacent waters. A curvilinear coordinate system is used to generate the horizontal grid with a variable resolution for the regional oceans from $5^{\circ}$S to $45^{\circ}$N and $100^{\circ}$E to $155^{\circ}$E. The higher resolution region has about a 10 km by 10 km grid covering the complex geometry of the coastal marginal seas, while the lower resolution region has about a 30 km by 30 km grid covering the eastern Pacific. The model is initialized by the Levitus annual climitology and forced by the monthly mean air-sea fluxes of momentum, heat, and freshwater derived from the Comprehensive Ocean-Atmosphere Data Set. High-resolution and low-viscosity are identified as the key factors for a better representation of the exchange of waters through narrow straits and passages between the marginal seas and their adjacent waters. The dynamics of the loop currents and eddies in the South China Sea and Celebes Sea are examined in detail. It has found that the anticyclonic loop and detached eddies from the Kuroshio through the Luzon Strait play an important role in transporting warm and salty water into the South China Sea, while the cyclonic circulation of the Mindanao Current in the Celebes Sea plays a role in contributing cold water to the Indonesian throughflow. The deep undercurrent of the western Pacific is shown to provide fresher water to the South China Sea and Celebes Sea. These modeling results suggest that the exchange processes via the narrow straits and passages are of fundamental importance to the maintenance of water masses for the marginal sea region.

한의학에서 바라본 향의 인지 과정과 인체 작용 (Recognition Process and Effects of Fragrance(aroma) in Oriental Medicine)

  • 엄지태;김경신;김병수
    • 동의생리병리학회지
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    • 제24권6호
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    • pp.935-941
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    • 2010
  • Fragrance(aroma) have many effects on body. Recently, aromatherapy was used to treat dementia, atopicdermatitis, alopecia areata, perineal disease, lymphatichydrops, and articularrheumatism. And people are interested in physical and mental effects of aroma, especially in mental. People empirically have been known the effects of aroma on soul and used aroma in life from long ago. They have had a meditation and had a sacrificial rites burning incense. Scholars also burned incense when reading books or tasting tea. Until now, there is no physiological study about recognition process and effects of aroma on body, but only many clinical studies using aromatherapy. Fragrance(aroma) is different from smell and good flavors of herbs. And it goes through nose and has effects on body in harmony on So-mun(素問). Also flavors of herbs are spreaded ki of herbs and have many effects on body. Aroma coming through the nose is recognized by co-operation of five-viscera(五臟), especially heart and lung. The nose and pectoral qi(宗氣) are related with lung. The lung opens into the nose, reflect its physiological and pathological conditions. Pectoral qi(宗氣) is the combination of the essential qi derived from food with the air inhaled, stored in the chest, and serving as the dynamic force of blood circulation, respiration, voice, and bodily movements. Because of the heart-spirit(心神), Heart is the organ can recognize the aroma, although the nose is the first organ of receiving aroma. Five spirits(五神: ethereal soul(魂), spirit(神), ideation(意), corporeal soul(魄), will(志)) and seven emotions(七情: joy(喜), anger(怒), anxiety(憂), thought(思), sorrow(悲), fear(恐), fright(驚)) are rerated with five-viscera(五臟) and essence-spirit (精神) processing steps and express of emotions. And aroma effects on five-viscera(五臟). So aroma have many effects on body, especially mentally.

2011년 2월 11~12일 부산 근해에서 발달한 극저기압에 대한 사례연구 (A Case Study on the Polar Low Developed over the Sea Near Busan on 11~12 February 2011)

  • 이재규;김해민;김유진
    • 대기
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    • 제26권2호
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    • pp.301-319
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    • 2016
  • The evolutionary process of the polar low, which caused the heavy snowfall in the East Coast area on 11~12 February 2011, was investigated to describe in detail using synoptic weather charts, satellite imageries, and ERA (European Centre for Medium-Range Weather Forecasts Re-Analysis) -Interim reanalysis data. It was revealed that 1) the polar low was generated over the sea near Busan where a large cyclonic shear in the inverted trough branched from the parent low existed, 2) during the developing and mature stages, there was a convectively unstable region in the lower layer around the polar low and its south side, 3) the polar low was developed in the region where the static stability in the 500~850 hPa layer was the lowest, 4) the result from the budget analysis of the vorticity equation indicated that the increase in the vorticity at the lower atmosphere, where the polar low was located, was dominated mainly by the stretching term, 5) the warm core structure of the polar low was identified in the surface-700 hPa layer during the mature stage, 6) there was a close inverse relationship between a development of the polar low and the height of the dynamic tropopause over the polar low, and 7) for generation and development of the polar low, large-scale circulation systems, such as upper cold low and its combined short wave trough, major low (parent low), and polar air outbreak, should be presented, indicating that the polar low has the nature of the baroclinic disturbance.

밀양(密陽) 경덕단(景德壇)과 만운재(萬雲齋)의 건축적 특성 - 근대한옥의 성격을 중심으로 - (A study on the Architectural Characteristics of Kyungduk-Dan and Manun-Jae in Miryang -Mainly about the Characterics of Traditional Houses in modern era(1876-1945)-)

  • 이호열
    • 건축역사연구
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    • 제10권1호
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    • pp.9-23
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    • 2001
  • This study is for the Kyungduk-Dan(as a altar of Milsung-Daegun) and The Manun-Jae the characteristics(lay out and planning, window patterns, structure, materials) of the the Korean traditional house during the modern era. Before Manun-Jae was used for the house. The Kyungduck-Dan was constructed in August according to the Lunar Calender in 1927. The Manun-Jae(house for Ki-hun Kang, millionaire ) was completed in 1924. Modern Architectures brought to Korea with the bricks, the tiles, the flash doors, the plate grasses, the brass hardwares. These architectural material was used in positive. During the construction of Manun-Jae in 1924, it happened the architectural exchage among a korean, a chinese and a japanese constructor. Though using the air exhaust valve at the kitchen of Ukyung-Kak( old Anchae), it could be assume that the modern convenience and the improvement of residential environments was considered at that period during the construction of Manun-Jae. That construction was elected with the brick($222mm{\times}106mm{\times}50mm$), the chinese colored tile and plate glass such a modem materials. The new shape of the korean lattice window and the wooden flash-door with glass was used. In Ukyung-Kak, the Chan-Maru(service space) and the kitchen such as a service space or concise utility zone was organically connected. Especially, considered the domesitic activity and circulation, the western kitchen sink and the Chan-Maru(service space) was rationally placed. At the Manun-Jae and the Kyungduck-Dan, the architectural characteristic is that the new shape of windows was used. The lattice window at the Ondol room of Ukyung-Kak, was rgadually added the plate glass and the wood plate. The lattice window with the grid shape at kitchen of that building was adapted japanese grid lattice window in korea at that period. It is the sample that korean traditional house was typically influenced from the japanese resident culture. The Manun-Jae and the Kyungduck-Dan as the modern house kept the form of korean traditional architecture, and was partially adapted a modern characteristic space and modern architectural materials. During the japanese occupancy, these residence can be showed the transition in formally.

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해풍시작에 영향을 미치는 지형성 강풍현상에 대한 수치실험 (Numerical Experiments on the Terrain Following Strong Wind Phenomenon Effecting to the Onset of Sea Breeze)

  • 이화운;정우식
    • 한국지구과학회지
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    • 제24권4호
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    • pp.325-336
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    • 2003
  • 관측지점의 위치를 살펴보면 해안으로부터 수영은 약 5m정도이고 해운대는 약 1km정도 떨어져 있다. 하지만 해운대에서의 해풍시작시간이 수영보다 빨리 나타난다. 따라서 국지순환모형인 LCM을 이용하여 수영과 해운대에서 해풍시작시간에 대한 지형의 효과를 수치모의 하였다. 이러한 현상은 야간의 복사냉각에 의해 형성된 흐름에 의한 것으로 분석되었는데, 도심지를 둘러싸고 있는 고지대의 경사면을 따라서 수렴된 공기가 가장 저지대인 수영지역으로 흘러가기 때문에 나타난 것으로 이러한 현상은 일출 후에도 나타난다. AWS자료를 분석한 결과, 수영에서 해운대에 비해 약 3배정도 강한 강풍현상이 나타났는데, 이는 수영지역이 야간공기의 유출구이기 때문이다. 이를 통해 지형조건이 해풍의 시작에 중요한 역할을 한다는 것을 알 수 있었다.

비(鼻)의 생리기능(生理機能)에 대한 연구(硏究) (Literatural Study on Physiological Function of Nose)

  • 허준영;강정수
    • 혜화의학회지
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    • 제9권1호
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    • pp.121-134
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    • 2000
  • The following results obtained through studies related on nose. 1. Nose is called mingtang(明堂) mianwang(面王), as it emphasize the meaning of viewing diagnosis(望診) and is called yuanpinzhimen(元牝之門), tianpinzhimen(天牝之門), qiqizhimen(七氣之門) as it emphasize the meaning of the entrance of atmosphere flow. Because it's position is the middle of face, we call tianzhongzhiyue(天中之嶽), zhongyue(中嶽). 2. As the organ of body, nose comes under the category of lung-iron(肺金), functionally comes under the category of heart-fire(心火). Functionally we can smell oder, organically nose is the pathway of respiration and to be resonator. 3. Wuzangliufu(五臟六腑) is arranged closely around the nose. The essence of wuzangliufu(五臟六腑) reflect nose, so nose becomes the standard of coloring diagnosis(色診). 4. We call nose is feihou(肺候), but it is not connected directly between the lung channel and nose. In case of lung symptom(肺證), first of all, nose become to appear the condition of lung, the lung channel and nose is close functionally. 5. The view of channels, nose is a connection with channels of yangming(陽明), bladder(膀胱), du(督脈) directly. By the connecting of each three channels, spleen stomach heart and kidney(脾胃心腎) are connected with indirectly. As the result of the relation, nose helps for body to breathe and to circulate qi(氣) and smell. And so the nature of wuzangliufu(五臟六腑) appear to the nose. 6. Particularly, the yangming channel(陽明經), and the bladder channel(膀胱經) are important. Because air-qi(天氣) reach to kidney lung through nose, ground-qi(地氣) reach to spleen stomach through mouth and yingwei(營衛) revolve through the bladder channel(膀胱經). As the result nose becomes the essential organ of circulation of yinewei(營衛), ascent and descent of qi(氣).

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NATURAL CONVECTION HEAT TRANSFER CHARACTERISTICS IN A CANISTER WITH HORIZONTAL INSTALLATION OF DUAL PURPOSE CASK FOR SPENT NUCLEAR FUEL

  • Lee, Dong-Gyu;Park, Jea-Ho;Lee, Yong-Hoon;Baeg, Chang-Yeal;Kim, Hyung-Jin
    • Nuclear Engineering and Technology
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    • 제45권7호
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    • pp.969-978
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    • 2013
  • A full-sized model for the horizontally oriented metal cask containing 21 spent fuel assemblies has been considered to evaluate the internal natural convection behavior within a dry shield canister (DSC) filled with helium as a working fluid. A variety of two-dimensional CFD numerical investigations using a turbulent model have been performed to evaluate the heat transfer characteristics and the velocity distribution of natural convection inside the canister. The present numerical solutions for a range of Rayleigh number values ($3{\times}10^6{\sim}3{\times}10^7$) and a working fluid of air are further validated by comparing with the experimental data from previous work, and they agreed well with the experimental results. The predicted temperature field has indicated that the peak temperature is located in the second basket from the top along the vertical center line by effects of the natural convection. As the Rayleigh number increases, the convective heat transfer is dominant and the heat transfer due to the local circulation becomes stronger. The heat transfer characteristics show that the Nusselt numbers corresponding to $1.5{\times}10^6$ < Ra < $1.0{\times}10^7$ are proportional to 0.5 power of the Rayleigh number, while the Nusselt numbers for $1.0{\times}10^7$ < Ra < $8.0{\times}10^7$ are proportional to 0.27 power of the Rayleigh number. These results agreed well with the trends of the experimental data for Ra > $1.0{\times}10^7$.