• 제목/요약/키워드: Heat Accumulation

검색결과 226건 처리시간 0.029초

한방진료에서의 설문지의 유용성 연구 : 복치의학회 설문지를 위주로 (The Study on Benefits of questionnaire for Oriental Medical Treatments : based a symptom questionnaire of Korean association of abdomen diagnosis and treatment)

  • 홍성민;오민석
    • 혜화의학회지
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    • 제18권2호
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    • pp.131-140
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    • 2009
  • The aim of this study is to find out benefits of symptom questionnaire for oriental medical treatments. We analyzed symptom questionnaire of Korean association of abdomen diagnosis and treatment. Conclusions are as below. 1. Appetite, taste and digestion have a deep connection with accumulation and muscular contracture, with which the method of reinforcement and reduction is decided. 2. Feces, urine and, sweat have a deep connection with accumulation and water, with which the method of diaphoresis, emesis and purgation is decided. 3. Thirst and chillness and fever have a deep connection with water poisons and feverish feeling, based on which the cold and heat is classified. 4. we can find out the lesions with departmentalized physical sections of the head and the face, the chest, the abdomen, the articulations, the limbs and the skin. 5. It is possible to select appropriate prescription and assess before & after treatment through the questionnaire.

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착상조건 하에서 핀-관 열교환기의 성능예측을 위한 컴퓨터 시뮬레이션 (A Computer Simulation for Performance Prediction of Fin-Tube Heat Exchanger under Frosting Conditions)

  • 이관수;박희용;이욱용;이태희;이수엽;이명렬
    • 설비공학논문집
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    • 제7권1호
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    • pp.161-170
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    • 1995
  • This study is concerned with the numerical analysis of performance on fin-tube heat exchanger under frosting condition. In this work, tube-by-tube method using LMED is employed. The present results are compared with O'Neal's experimental and numerical results. A standard evaporator model with 2rows-2columns is selected to investigate the effects of the various parameters such as fin pitch, air flow velocity, and humidity. The results show that frost thickness and the amount of frost per unit area decrease as fin-pitch becomes narrower. In the meantime, frost thickness and accumulation rate increase with higher inlet air humidity. It is shown that heat transfer rate increases during 30minutes and then it decreases. Heat transfer rate and the amount of frost increase with air velocity, however frost thickness does not increase over a certain velocity.

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희석된 수소/공기 확산화염의 비정상 음향파 응답특성 해석 (Unsteady Analysis of Acoustic-Pressure Responses of $N_{2}$ Diluted $H_{2}$ and Air Diffusion Flames)

  • 손채훈
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2003년도 추계학술대회
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    • pp.320-325
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    • 2003
  • Acoustic-Pressure Response of diluted hydrogen-air diffusion flames is investigated numerically by adopting a fully unsteady analysis of flame structures. In the low-pressure regime, the amplification index remains low and constant at low frequencies. As acoustic frequency increases, finite-rate chemistry is enhanced through a nonlinear accumulation of heat release rate, leading to a high amplification index. Finally, the flame responses decrease at high frequency due to the response lag of the transport zone. For a medium-pressure operation and low-frequency excitation, the amplification index is low and constant. It then decreases at moderate frequencies. As frequency increases further, the amplification index increases appreciably due to an intense accumulation effect.

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가상균열 모델을 이용한 피로균열 진전 해석 (Analysis of fatigue crack growth using fictitious crack model)

  • 양승용;구병춘
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2003년도 추계학술대회 논문집(III)
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    • pp.79-84
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    • 2003
  • A fictitious crack model was used to analyze fatigue crack growth under the influence of residual stress. In the fictitious crack model, crack is represented in terms of the separation of two adjacent interfaces and the constitutive equation between the separation and traction is assumed. The effect of fatigue loading was included in the constitutive equation by considering damage accumulation in the cohesive zone. To investigate the effect of the residual stress on the fatigue crack growth, we calculated the residual stress distribution due to transient heat flux to the specimen by finite element method. Fatigue crack growth was simulated by the fictitious crack model with repeated loading. The mode-I crack growth rates were compared for the cases with and without the compressive residual stress around the crack tip. It was observed that the mode-I crack growth can be suppressed by compressive residual stress.

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두날리엘라 살리나 추출물의 피부 열노화 억제 효과 (Inhibitory Effects of Dunaliella salina Extracts on Thermally-Induced Skin Aging)

  • 주지혜;석지현;홍인기;김남경;최은미
    • 대한화장품학회지
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    • 제42권1호
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    • pp.57-64
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    • 2016
  • 자외선과 유사하게 열에 의한 콜라겐 분해와 비정상적인 탄력섬유의 축적을 증가시키는 현상을 열노화라 칭한다. 두날리엘라 살리나는 녹조류로 베타카로틴을 많이 함유하고 있어 건강식품으로 많이 이용되고 있으나 열에 의해 유도된 피부노화에서의 효능은 알려진 바 없다. 본 연구에서는 두날리엘라 살리나 에탄올 추출물의 항-열노화 효능을 확인하였다. 열을 가한 피부섬유아세포를 이용하여 MMP-1과 type I procollagen 발현을 ELISA를 이용해 확인하였다. 두날리엘라 살리나 추출물이 열에 의해 증가된 MMP-1 단백질 발현량을 감소시키며, type I procollagen 단백질 발현량은 증가시킨다는 사실을 확인하였다. 추가적으로, 두날리엘라 살리나 추출물에 의해 콜라겐 합성 과정에 관여하는 것으로 알려진 HSP47 mRNA의 발현이 증가함을 확인하였다. 또한, 두날리엘라 살리나 추출물이 염증매개인자(TGF-${\beta}$, IL-12 등)의 발현을 감소시킴을 확인하였다. 다음으로 두날리엘라 살리나 추출물이 탄력섬유의 구성성분인 tropoelastin과 fibrillin-1 단백질 발현과 MMP-12 발현 조절을 통해 열에 의해 유도된 일광탄력섬유증을 조절하는 효능을 확인하였다. 이 결과를 통해 두날리엘라 살리나 추출물이 열에 의해 유도된 피부열노화를 효과적으로 예방함을 확인하였다.

Sweet BV가 복부비만에 미치는 영향 (Clinical Studies of Sweet Bee Venom to The Effect of Abdominal Fat Accumulation)

  • 임청산;박원필;장성봉;최영곤;김관수;권기록;이희춘
    • 대한약침학회지
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    • 제11권2호
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    • pp.33-40
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    • 2008
  • Objective The purpose of this study was to investigate the effects of Sweet Bee Venom to the abdominal fat accumulation clinically. Methods The 20 healthy women volunteers who showed the notice of this study by the home page of Sangji University were treated with Sweet Bee Venom(SBV) during twenty times. To investigate the effects of Sweet Bee Venom of the abdominal fat accumulation, abdominal CT, LFT, Thermography, BMI, Inbody 3.0 etc. were performed during clinical trials. And statistical analysis was carried out the data of 10 volunteers who performed all the schedule of this study. Results Following results were obtained from the clinical studies Sweet Bee Venom showed the effect of decreased the body weight, thickness of abdominal skin and fat layer, BMI, and increased abdominal heat, but they are not showed statistical significant. Conclusions These results suggest that treatment Sweet Bee Venom on the abdomen was effective to decrease fat tissue but for the treatment of obesity was performed with right diet program and exercise.

나역에 대한 文獻的 考察(處方과 藥物을 중심으로) (A Literature Study on the Cervical Lymphic Node)

  • 민영규;정동환;심상희;박수연;김종한;최정화
    • 한방안이비인후피부과학회지
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    • 제16권2호
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    • pp.1-45
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    • 2003
  • We get the conclusion this following through bibliographic consideration about the cause of disease, disease mechanisms and remedy, prescription of tuberculosis of the cervical lymphic node. 1. The tuberculosis of the cervical Iymphic node is named the linear lump of scrofula(마도라력), the scrofula around neck(반사력), the wide-spread scrofula(류주력), the papule like lotus seed(련자력), the scrofula(라력), the subcutaneous nodes(結核), the scrofula due to disorder of Gi(기력) and the scrofula due to accumulation of phlegm(담력) according to the criterion of regions of disease, causes, rounding parts and shapes. 2. The cause of the tuberculosis of the cervical lymphic node are the stagnation of liver Gi(肝氣鬱結), the accumulation of phlegm and the stagnation of Gi(痰凝氣滯), the deficiency of vital essence of the liver and kidney(肝腎陰虛), the wind-heat of liver, gallbladder and triple warmer(肝膽三焦風熱), the dry-fire(燥火), the dryness of blood(血燥), the unwholesome diet(飮食不潔), the abundance of diet(食味之厚), the stagnation of Gi(鬱氣之積), the exhaustion syndrome(虛勞), the excessive thought(思慮過多), the toxin of wind-heat(風熱毒) and the germ of subcutaneous nodes(結核菌). 3. Symptoms of the tuberculosis of the cervical lymphic node are swelling slowly in comparison in the early days of occurrence, and are not pain, not itch, not heat, not other special symptoms. But in some cases, tuberculosis of the cervical lymphic node are quickly swelling in the early days of occurrence, and the fever and pain appear, The pyosis is accompanied with the fever and the pain at first generally, and then removing the pus from abscess is dissolved the fever and the pain in the majority of cases and representative of the general exhaustion syndrome. 4, The remedy of tuberculosis of the cervical Iymphic node is the early days, clearing the liver and relieves constraint(疏肝解鬱), phlegm and dissolving accumulation(化痰散結) the middle days, pus draining and toxin expelIing(托裏透膿) the latter days, replenish the kidney and strengthen the spleen(滋腎健脾). 5. The medication to treat the tuberculosis of the cervical lymphic node are the 益氣養榮湯(lkgiyangyoungtang)(14th), the 夏枯草散(Hagochosan)(10th) and et cetra in regular sequence. 6. The herb to treat the tuberculosis of the cervical Iymphic node are the 連翹(FRUCTUS FORSYTHlAE)(59th), the 甘草(RADIX GLYCYRRHIZAE)(51th), the 當歸(RADIX ANGELICAE GlGANTIS)(47th), the 黃芩(RADlXSCUTELLARIAE)(40th), the 夏枯草(SPICA PRUNELLAE)(23th) in regular sequence.

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열펌프를 이용한 슬러리 돈분뇨 증발건조처리시스템 개발 (Development of Heat Pump Use Slurry Pig Manure Evaporation Drying System)

  • 김현태;최홍림
    • Journal of Biosystems Engineering
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    • 제30권1호
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    • pp.32-37
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    • 2005
  • This study was conducted the slurry pig manure treatment by condensation drying of liquid from the slurry manure with a heat-pump and electric heater combined with air flow channel system. The system was designed as liquid and solid matters separation of slurry manure, and it can doing continuous input of slurry manure from a pig house, and it can operated year round use for pig farms. The separation of liquid and solid matters from slurry manure needed the prevention of solid accumulation in the system. The system was designed as closed space from outside air space for maximized evaporation of liquid and the condensation of liquid from slurry manure. The system can be operated the pig slurry manure treatment regardless of seasons in a yew. The separated evaporation water from the pig slurry manure by the heat-pump was satisfactorily pure water that can be used as washing water in livestock farms. The system can applicate to about 100 heads of pig, and the proper area of evaporation plate system was considered around $10\;m^2$. The input electrical energy of about 15 kWh which the cost equal to 250,000 won per month.

The Optimized Design of a NPC Three-Level Inverter Forced-Air Cooling System Based on Dynamic Power-loss Calculations of the Maximum Power-Loss Range

  • Xu, Shi-Zhou;He, Feng-You
    • Journal of Power Electronics
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    • 제16권4호
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    • pp.1598-1611
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    • 2016
  • In some special occasions with strict size requirements, such as mine hoists, improving the design accuracy of the forced-air cooling systems of NPC three-level inverters is a key technology for improving the power density and decreasing the volume. First, a fast power-loss calculation method was brought. Its calculation principle introduced in detail, and the computation formulas were deduced. Secondly, the average and dynamic power losses of a 1MW mine hoist acting as the research target were analyzed, and a forced-air cooling system model based on a series of theoretical analyses was designed with the average power loss as a heat source. The simulation analyses proves the accuracy and effectiveness of this cooling system during the unit lifting period. Finally, according to an analysis of the periodic working condition, the maximum power-loss range of a NPC three-level inverter under multi cycle operation was obtained and its dynamic power loss was taken into the optimized cooling system model as a heat source to solve the power device damage caused by instantaneous heat accumulation. The effectiveness and feasibility of the optimization design based on the dynamic power loss calculation of the maximum power-loss range was proved by simulation and experimental results.

다공도가 다른 전열촉진관의 냉매 풀비등에 미치는 오일의 영향 (Effect of Oil on Pool Boiling of Refrigerant on Enhanced Tubes having Different Pore Sizes)

  • 김내현;이응렬;민창근
    • 설비공학논문집
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    • 제18권3호
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    • pp.254-261
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    • 2006
  • The effect of enhanced geometry (pore diameter, gap width) is investigated on the pool boiling of R-123/oil mixture for the enhanced tubes having pores with connecting gaps. Tubes with different pore diameters (and corresponding gap widths) are specially made. Significant heat transfer degradation by oil is observed for the present enhanced tubes. At 5% oil concentration, the degradation is 26 to 49% for $T_{sat}=4.4^{\circ}C$. The degradation increases 50 to 67% for $T_{sat}=26.7^{\circ}C$. The heat transfer degradation is significant even with small amount of oil (20 to 38% degradation at 1% oil concentration for $T_{sat}=4.4^{\circ}C$), probably due to the accumulation of oil in sub-tunnels. The pore size (or gap width) has a significant effect on the heat transfer degradation. The maximum degradation is observed for $d_p$ = 0.20 mm tube at $T_{sat}=4.4^{\circ}C$, and for $d_p$=0.23 mm tube at $T_{sat}=26.7^{\circ}C$. The minimum degradation is observed for $d_p$=0.27 mm tube for both saturation temperatures. It appears that the oil removal is facilitated for the larger pore diameter (along with larger gap) tube. The highest heat transfer coefficient with oil is obtained for $d_p$ =0.23 mm tube, which yielded the highest heat transfer coefficient for pure R-123. The heat transfer degradation increases as the heat flux decreases.