• 제목/요약/키워드: circulation of water

검색결과 1,214건 처리시간 0.031초

상생지원(相生池苑) 기본계획 (A Landscape Design of Sangsaengjiwon)

  • 박경복
    • 한국조경학회지
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    • 제36권1호
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    • pp.12-27
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    • 2008
  • The purpose of this plan was to introduce the imaginary environment concept to modem environment design which was drawn by comparison of historic and cultural landscape. An area of $19,056m^2$ in I1-ja mountain water reservoir, located in 94 Dun-Chon-Dong, Gangdong-Gu, Seoul was selected for this planning. The concepts of Barrier-Free Design and Universal Design were introduced in order to accept the demands of various social classes. Based on the results of natural and cultural environment, Animism, Heaven, Earth and Man Theory and Yin-Yang and the Five Elements Theory these concepts were introduced for the philosophical background. Concept planning, topic selection, space planning and axis establishment were conducted during the framework step of the plan. Circulation planning, planting planning, facility and pavement planning, and light planning were conducted during the initial planning step. Lastly, detailed designing was performed for the major spaces. In addition, the imaginary environment concept was applied, ranging from the structural aspect of the space to designing factors of the facility in order to achieve placeness and practicality. In conclusion, this may be the first case design applying the imaginary environment concept to the environmental design with natural environment factors such as animals, plants, terrains and climate, and cultural such as cities, places, time, thoughts and symbols which are all factors to be considered in the existing environment design.

어촌어항과 해수욕장의 워터프론트 개발 계획에 관한 연구 - 강원 안목항을 중심으로 - (A Study of Development on Waterfront of Fishing Village National Harbor and Swimming Beach - Foused on Anmock Harbor in Gangwon Province -)

  • 조원석;김흥기
    • 한국농촌건축학회논문집
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    • 제10권2호
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    • pp.37-44
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    • 2008
  • Both environments and landscape can be checked in development of waterfront, Nevertheless this conditions does not control at the programming phase as much as necessary in absorption speed of development. Therefore this paper aims to analyze for the environmental space and sustainable landscape. In case of Anmock Harvor, our team carried out interview method by satisfaction level and attractiveness to take requirements of users. This research is to provide that fishing village-national harbor and swimming beach based on the waterfront scale, consists of pedestrian mall, promenade circulation, various water friendly park and beautiful pier. This study proposes two strategies for better life by waterfront space: first, renewal guideline is necessary to masterplan: second, systematic comprehensive plan can be established regal procedures(District Unit Plan & Agreement of Landscape) by participation of regional resident. This survey of waterfront spatial data is expected to use for environmental improvement of fishing village, harbor and swimming beach.

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기허증(氣虛證)의 임상 질환 범위에 대한 고찰 (Study on Clinical Diseases of Qi Deficiency Pattern)

  • 박미선;김영목
    • 동의생리병리학회지
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    • 제27권5호
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    • pp.487-496
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    • 2013
  • This article is a study on to which categories of modern diseases qi deficiency pattern types are assigned by reference to modern clinical papers to analyze and understand modern diseases with the perspective of Korean Medicine. Clinical papers were searched in China Academic Journals(CAJ) of China National Knowledge Infrastructure(CNKI) from 1994 to 2013. Conclusions are as follows. First, qi deficiency pattern types are roughly classified as qi deficiency pattern, qi-yin dual deficiency pattern and qi deficiency pattern related with viscera and bowels. Second, there are many patterns combined with static blood, qi stagnation, phlegm, dampness, heat, toxin, water or fluid deficiency and the level of pattern designation is more specific than pattern types in Korean Standard Classification of Diseases(KCD), which makes the pattern types more useful to clinical application. Third, static blood due to qi deficiency is the most frequent combined pattern and diseases related with blood circulation such as angina, atherosclerosis, hyperlipidemia and chronic obstructive pulmonary disease(COPD) were reported on that pattern. The detailed relation between modern diseases and pattern types can be an another topic.

식물성 절연유 변압기의 냉각특성 변화에 따른 최고점온도 특성 해석 (Characteristic Analysis of Hot Spot Temperature according to Cooling Performance Variation of Natural Ester Transformer)

  • 김지호;이향범
    • 전기학회논문지P
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    • 제64권4호
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    • pp.236-240
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    • 2015
  • Natural ester has a higher biodegradability, flash and fire points, and a greater permittivity compared to conventional mineral oils. However, natural ester also has a higher pour point, viscosity, and water content. These characteristics hamper circulation and the electrical properties of oil-filled transformer. Thus, this paper applied electromagnetic-thermal-flow coupled analysis method to predict temperature distribution inside 154kV single phase power transformer using natural ester. It modeled in the actual appearance for the tank and winding of the power transformer to improve the accuracy of analysis and applied heat flow analysis that considered hydromechanics and heat transfer at the same time. It calculated the power loss, the main cause of temperature rise, from winding and core with electromagnetic analysis then used for the heat source for the heat flow analysis. It then compared the reasonability of result of measurement analysis based on the result acquired from temperature rise test using FBG sensor on the power transformer.

포장방법에 의한 콩떡의 저장 안정성에 관한 연구 (Studies on Storage Stability of Soybean Cake by Pakaging Method)

  • 정혜숙;김경자
    • 동아시아식생활학회지
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    • 제11권3호
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    • pp.190-195
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    • 2001
  • The objective of this study consists in finding the ways to make soybean cake (which is made of soaked soybean flour containing protein and lipid) a scientific and practical food even more easily. This study took a measurement of the change of pH, organic acid, microorganism, retrogradation and so soon. observing soybean cake prepared with soybean flour containing 6% of soybean oil at room temperature(19$^{\circ}C$) in two types of packaging, that is to say, $CO_2$ modified packing(CMP) and liner low density poly ethylene(LLDPE) packaging. As storing time went by, packed soybean cake didn't appeared in 12 days, either. Using modified atmosphere packaging soybean cake showed higer pH as well as less organic acid than unpacked. In addition, mould method makes water - activity lower, and it Puts a curb on the development of aerobic perishable microorganism and the retrogradation of rice cake. Unpacked soybean cake showed higher values than CMP Soybean Cake with enthalpy of retrogradation and the longer storing period the greater retrogradation process. Thus, storing or circulation period can be increased effectively without chemical or physical treatment.

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Design of Alternating Magnetic Field Stimulator Using Duty Factor

  • Jang, Tae-Sun;Lee, Jin-Yong;Lee, Hyun-Sook;Kim, Sun-Wook;Hwang, Do-Guwn
    • Journal of Magnetics
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    • 제17권1호
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    • pp.42-45
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    • 2012
  • We have developed an alternating magnetic field stimulation system consisting of a switched-mode power supply and a digital control circuit which modulates a duty ratio to maintain a magnetic field intensity of a few mT even while the frequency increases up to 4 kHz with a controllable coil temperature below $30^{\circ}C$ in air. This duty ratio modulation and water circulation are advantageous for cell culture under ac-magnetic field stimulation by preventing the incubator from exceeding a cell-viable temperature of $37^{\circ}C$. Although the temperature of the coil when subjected to a sinusoidal voltage rapidly increased, that of our system modulated by the duty factor did not change. This is a potentially valuable method to investigate the effects of intermediate frequency magnetic field stimulation on biological entities such as cells, tissues and organs.

접촉식 시일장치의 밀봉 접촉면 형상에 대한 최적화 설계연구 (Optimization Design on the Sealing Surface Profiles of Contacting Seal Units)

  • 김청균
    • 한국생산제조학회지
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    • 제20권6호
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    • pp.761-766
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    • 2011
  • In this study, the optimized design profiles between a seal ring and a seal seat of contacting seal units has been proposed based on the FEM computed results. The maximum temperatures, the thermal distortions in axial and radial directions, and maximum contact normal stresses between a seal ring and a seal seat have been analyzed for various contact sealing profiles. The FEM computed results present that the contact area between seal rings and seal seats is very important for a good tribological performance such as low friction heating, low wear, high contact normal stress in a primary sealing components. The seal surface model III in which has a small sealing contact area shows low dilatation of primary sealing components, and high contact stress between a seal ring and a seal seat. This model with small contact surface of a seal ring produces high friction heating and contact stress. But the model III produces very small deformations of contacting sealing surface because of high convection heat transfer by cooling water circulation around the seal ring surface. Thus, the analysis results recommend a short width of a primary sealing unit rather than a big width of contact surfaces of contacting seal units for reducing a leakage and axial deformation of primary seal components.

동해 아극전선 해역의 수중음향환경 및 저주파 음파전달 양상 (Underwater Acoustic Environment and Low Frequency Acoustic Transmission in the Sub-Polar Front Region of the East Sea)

  • 임세한;류건희
    • 한국군사과학기술학회지
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    • 제12권4호
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    • pp.415-423
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    • 2009
  • To investigate low frequency acoustic transmissions in the Sub-Polar Front(SPF) of the East Sea, numerical experiments are conducted with Range dependent Acoustic Model(RAM) using Circulation Research of the East Asian Marginal Seas(CREAMS) data and Autonomous Profiling Explorer(APEX)) data. Significant seasonal variations of sea water properties are existed across the Sub-Polar Front(SPF) region from the north and the south. The model results show that Transmission Loss(TL) decrease(about 20dB) with ideal front in the warm region whereas TL increase(about 25dB) with ideal front in the cold region. Regardless of season(both in summer and winter), when the sound source is located in the cold region of the SPF, the model results show weak TL, compared to the case of the source in the warm region(Maximum difference of TL reaches 28dB). This difference between the cases when the source is located in the cold region and the warm region, is accounted for from the different vertical profiles of sound speed in both regions.

Environmental Mercury and Its Toxic Effects

  • Rice, Kevin M.;Walker, Ernest M. Jr.;Wu, Miaozong;Gillette, Chris;Blough, Eric R.
    • Journal of Preventive Medicine and Public Health
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    • 제47권2호
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    • pp.74-83
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    • 2014
  • Mercury exists naturally and as a man-made contaminant. The release of processed mercury can lead to a progressive increase in the amount of atmospheric mercury, which enters the atmospheric-soil-water distribution cycles where it can remain in circulation for years. Mercury poisoning is the result of exposure to mercury or mercury compounds resulting in various toxic effects depend on its chemical form and route of exposure. The major route of human exposure to methylmercury (MeHg) is largely through eating contaminated fish, seafood, and wildlife which have been exposed to mercury through ingestion of contaminated lower organisms. MeHg toxicity is associated with nervous system damage in adults and impaired neurological development in infants and children. Ingested mercury may undergo bioaccumulation leading to progressive increases in body burdens. This review addresses the systemic pathophysiology of individual organ systems associated with mercury poisoning. Mercury has profound cellular, cardiovascular, hematological, pulmonary, renal, immunological, neurological, endocrine, reproductive, and embryonic toxicological effects.

NiO Films Formed at Room Temperature for Microbolometer

  • Jung, Young-Chul;Koo, Gyohun;Lee, Jae-Sung;Hahm, Sung-Ho;Lee, Yong Soo
    • 센서학회지
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    • 제22권5호
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    • pp.327-332
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    • 2013
  • Nickel oxide films using RF sputter was formed on the $SiO_2/Si$ substrate at the room temperature controlled with water circulation system. The feasibility of nickel oxide film as a bolometric material was demonstrated. GIXRD spectrum on NiO(111), NiO(200), and NiO(220) orientation expected as the main peaks were appeared in the grown nickel oxide films. The typical resistivity acquired at the RF power of 100W was about $34.25{\Omega}{\cdot}cm$. And it was reduced to $18.65{\Omega}{\cdot}cm$ according to the increase of the RF power to 400W. The TCR of fabricated micro-bolometer with the resistivity of $34.25{\Omega}{\cdot}cm$ was $-2.01%/^{\circ}C$. The characteristics of fabricated nickel oxide film and micro-bolometer were analyzed with XRD pattern, resistivity, TCR, and SEM images.