• Title/Summary/Keyword: cold and heat application

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A Study on the Air Conditioning System by the Low Temperature Energy of the Deep Seawater (해양심층수 이용 냉방시스템에 관한 연구)

  • Park, Seong-Je;Kim, Hyo-Bong;Kim, Hyeon-Ju
    • Proceedings of the Korea Committee for Ocean Resources and Engineering Conference
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    • 2006.11a
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    • pp.253-256
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    • 2006
  • This paper shows the study on application of the law temperature energy in the deep seawater. Deep, cold seawater has long been recognized as a valuable ocean energy resource. Recently, research and experimentation has been conducted on energy systems using deep seawater: deep seawater air conditioning system, ice-making device, salt and fresh-water manufacturing system and the Spray freeze drying system for extracting valuable material of the deep seawater. They are technically and economically feasible today: once installed, the energy is inexhaustible and there are no adverse environmental impacts. Because of the economy of scale in the air conditioning system, the seawater A/C system is most appropriate for supplying multiple buildings or hotels in a coastal area.

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Insulation Performance Evaluation for Waterproofing Materials that Uses Air Cap Sheet (에어캡시트를 이용한 단열 보완형 방수공법의 단열성 평가)

  • Ma, Seung Jae;Lee, Jong Yong;Choi, Sung Min;Oh, Sang Keun
    • Proceedings of the Korean Institute of Building Construction Conference
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    • 2015.05a
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    • pp.175-176
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    • 2015
  • Insulation in buildings are one of the crucial factors for energy reduction, and depending on the application areas and properties of the insulation requirements, various different types of insulation materials are being developed, produced, and used. Amongst these is the aircaps often used as packing materials. Because of their porous nature, they are highly efficient in preventing heat and are consequently used overseas often as insulation materials and as part of cold water concrete insulation curing method. This paper studies the recently developed usage of aircaps in waterproofing materials and evaluated their performance as supplementary insulation materials.

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The Study of Thermal Properties of TMA Clathrate on Additives (첨가제를 첨가한 TMA 물계-포접화합물의 열물성 연구)

  • Kim, K.I.;Chung, N.K.;Kim, J.H.;Kim, C.O.
    • Proceedings of the KSME Conference
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    • 2003.11a
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    • pp.250-255
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    • 2003
  • TMA clathrate that is used as PCM of low temperature thermal storage system in this research creates hydrate crystallization at higher temperature then pure water, and its application is expected as PCM because of comparatively big latent heat without phase separation phenomenon. Acetone, Ethylen Glycol, and Ethanol is used as additive and evaluated experimentally for the purpose of the improvement in subcooling of TMA clathrate. In view of the results so far achieved subcooling is improved, the running time of the refrigerator is reduced. Thus the results are expected to use for the increase of coefficient of performance of low temperature thermal storage system in the building.

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Open-Source Hardware Module Application for Remote Monitoring of Disaster Prevention (재난관리 원격 모니터링용 오픈소스 하드웨어 모듈 응용)

  • Jin, Kyung-Chan;Lee, Eun-Ju;Lee, Sung-Ho
    • Journal of Sensor Science and Technology
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    • v.24 no.5
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    • pp.299-305
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    • 2015
  • Since the natural disasters such as floods, droughts, heat wave and cold wave are increasing, the need for risk management is necessary to minimize the damage with utilizing IT technology. Also, the monitoring services of disaster response type have been developed and applied. Recently, the open source hardware based on the signal of the sensor, or the monitoring studies have been carried. In this paper, by analyzing a low-cost open source hardware platform such as Beagle board, we examine the utilization of the hardware-based module for sensor monitoring.

Power Electronics Application in the Steel Industries -Induction Heating Equipment- (철강산업에서의 전력전자 기술응용-유도가열장비)

  • Shim, Eun-Yong;Yoo, Hyo-Yol;Kang, Jae-Bong
    • Proceedings of the KIPE Conference
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    • 2008.06a
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    • pp.12-14
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    • 2008
  • We have been trying to do our every efforts in various division in order to get more highly competition of products in steel industry, Especially, for the industry of cold mill, We are making high degree durability & elegant of steel plate from high quality plating & coating. Recently, Induction heating equipments are used to be choose in order to heat the steel plate in processing of drying and of curing after plating and coating are done. This paper will describe the theory of induction heating, consideration matters to decide power supply, structure of heating coil & manufacturing, operating methods etc, also it will present installation reference.

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CLINICAL STUDY OF DESENSITIZER FOR TREATMENT OF DENTINAL HYPERSENSITIVITY (상아질 지각과민 처치제의 임상적 효과에 대한 연구)

  • Cho, Kyung-Mo;Shin, Dong-Hoon
    • Restorative Dentistry and Endodontics
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    • v.25 no.2
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    • pp.219-224
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    • 2000
  • The purpose of this study is for evaluating the effect of MS Coat desensitizing agent in clinical situation. In this study total 60 teeth of 30 patients who is feeling hypersensitivity after periodontal surgery were treated with MS Coat desensitizing agent, and 20 teeth with saline solution for placebo effects and evaluated. All teeth were cleaned with rubber cup and pumice, after then the antibacterial agent was applied for 20 seconds and simply isolated using cotton roll Desensitizing agent was applied with a specific instrument in the manufacturers package by abrading motion for 10 seconds and re-done 8 times. Tactile stimulus with sharp explorer, air stimulus with syringe of dental unit, $7^{\circ}C$ cold water stimulus using micropipette applicator was done to evaluate hypersensitivity before apply test agent, immediate after application, 1 week after, and 3 month after application. The degree of hypersensitivity was recorded using 100mm Visual Analogue Scale and compared between group and evaluation times. From this clinical study sensitivity to the stimulus was significantly induced in both groups and MS Coat made a significant reduction in VAS score than placebo group did(p<.01). The results of this study could demonstrate that MS Coat desensitizing agent can use effectively to heat dentinal hypersensitivity.

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An Application of Realistic Evaluation Model to the Large Break LOCA Analysis of Ulchin 3&4

  • C. H. Ban;B. D. Chung;Lee, K. M.;J. H. Jeong;S. T. Hwang
    • Proceedings of the Korean Nuclear Society Conference
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    • 1996.05b
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    • pp.429-434
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    • 1996
  • K-REM[1], which is under development as a realistic evaluation model of large break LOCA, is applied to the analysis of cold leg guillotine break of Ulchin 3&4. Fuel parameters on which statistical analysis of their effects on the peak cladding temperature (PCT) are made and system parameters on which the concept of limiting value approach (LVA) are applied, are determined from the single parameter sensitivity study. 3 parameters of fuel gap conductance, fuel thermal conductivity and power peaking factor are selected as fuel related ones and 4 parameters of axial power shape, reactor power, decay heat and the gas pressure of safety injection tank (SIT) are selected as plant system related ones. Response surface of PCT is generated from the plant calculation results and on which Monte Carlo sampling is made to get plant application uncertainty which is statistically combined with code uncertainty to produce the 95th percentile PCT. From the break spectrum analysis, blowdown PCT of 1350.23 K and reflood PCT of 1195.56 K are obtained for break discharge coefficients of 0.8 and 0.5, respectively.

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A literature Study on the Application of Sa-am Acupuncture for the Treatment of Hiccup (애역의 사암침법(舍巖鍼法) 활용(活用)에 대(對)한 문헌고찰(文獻考察))

  • Chae, Choong-Heon;Yim, Yun-Kyoung
    • The Journal of Korean Medicine
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    • v.28 no.3 s.71
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    • pp.232-243
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    • 2007
  • Objective : This study researched the application of Sa-am acupuncture for the treatment of hiccup. Methods : We investigated the literature for Sa-am acupuncture treatment and traditional acupuncture treatment for hiccup. Result & Conclusion : In traditional oriental medicine, hiccup is considered to be caused by uprising stomach gi, whereas, in Sa-am acupuncture, it is considered to be caused by weakness and impurity of lung gi. In Sa-am acupuncture, hiccup is divided into five classes; reverse hiccup (treated with large intestine tonification), wind hiccup (treated with liver tonification), fire hiccup (treated with heart tonification), damp hiccup (treated with spleen tonification) and cold hiccup (treated with kidney tonification). In traditional oriental medicine, hiccup is treated by way of lowering the uprising stomach gi, while, in Sa-am acupuncture, hiccup is treated by way of removing whichever of the original cause of hiccups (impurity of large intestine, damage to liver, dry heat of heart, impairment of spleen, exhaustion of kidney) caused the weakness and the impurity of lung gi. In Sa-am acupuncture, the therapeutic mode for all the five causes of hiccups is tonification mode.

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Cold Plasma Treatment Application to Improve Microbiological Safety of Infant Milk Powder and Onion Powder (콜드 플라즈마 처리를 이용한 분유와 양파분말 살균)

  • Oh, Yeong Ji;Lee, Hanna;Kim, Jung Eun;Lee, Seok Hoon;Cho, Hyung Yong;Min, Sea Cheol
    • Korean Journal of Food Science and Technology
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    • v.47 no.4
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    • pp.486-491
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    • 2015
  • The potential of applying cold plasma (CP) treatments to improve microbiological safety of powdered products has been investigated using infant milk powder (IMP) and onion powder (OP). Among the different kinds of CP-forming gases, He-$O_2$ (99.8:0.2) gas mixture and He gas were most effective in reducing the number of Cronobacter sakazakii in IMP and Bacillus cereus spores in OP, respectively. C. sakazakii counts in IMP decreased by $0.9{\pm}0.1{\log}\;CFU/g$ after CP treatment, and the extent of C. sakazakii inhibition increased in a time-dependent manner. CP treatment at 900 W for 20 min reduced the number of B. cereus spores by ~0.4 log spores/g. Treatments that integrated CP with microwave (MW-CP treatment) as well as those that integrated CP with heat and microwave (H-MW-CP treatment) resulted in a 90% reduction in the number of spores in OP. Thus, CP treatments demonstrated potential for decontaminating foodborne pathogens from powdered products, in combination with heat for improved effect.

The Effect of Moxibustion at Chonjung(CV17, Shanzhong) on Patients with Dysphagia after Stroke (중풍환자(中風患者)의 연하장애(嚥下障碍)에 전중혈 구치료(灸治療)가 미치는 효과(效果))

  • Na, Byong-Jo;Rhee, Jun-Woo;Lee, Cha-Ro;Park, Young-Min;Choi, Chang-Min;Sun, Jong-Joo;Jung, Woo-Sang;Moon, Sang-Kwan;Park, Sung-Wook;Cho, Ki-Ho;Kim, Tae-Hun
    • The Journal of Internal Korean Medicine
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    • v.26 no.2
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    • pp.353-359
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    • 2005
  • Objectives: Dysphagia is a common in stroke patients. Dysphagia often affects the rehabilitation of stroke patients by increasing the risk of nutritional deficits and aspiration pneumonia. Despite the proliferation of physical therapies including swallowing training, much controversy remains regarding the application and benefit of them. Therefore, in this study, the clinical effect of moxibustion at Chonjung(CV17, Shanzhong) on post-stroke dysphagia were assessed using Swallowing Provocation Test(SPT). Methods: Dysphagia subjects were selected by Dysphagia Screening Test. Swallowing function was tested by Swallowing Provocation Test(sec). Direct moxibustion was applied to the acupoint, Chonjung, five times and Swallowing Provocation Test was performed before and after 30 minute. The Latency Time of Swallowing Reflex (LTSR) was checked by SPT. To find factors related with improving swallowing function, Cold-Heat and Excess-Deficiency Diagnosis were considered. Results: A total of 42 patient were included, but two of them were excluded due to severe coughing. Overall, the swallowing reflex improved significantly. In subgroup analysis on brain lesion, non-brain stem lesion patients significantly improved. Moxibustion was more effective in the cold group than in the heat group, but there were no differences between the Excess and the Deficiency groups. Conclusions: The result of this clinical study suggest that moxibustion at Chonjung(CV17, Shanzhong) is an effective treatment for the dysphagia patients after stroke, especially in non-brain stem lesion and the cold diagnosed patients.

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