• Transactions of the Korean Society of Mechanical Engineers B
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• v.22 no.3
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• pp.408-415
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• 1998

This study presents experimental results on the shut-down and start-up characteristics of a residential split-system air-conditioner with capillary tube, using R410A as a R22 alternative refrigerant. During shut-down, the transient characteristics are evaluated by measuring the high side and low side pressures and temperatures of the system. The dynamic behavior of the system after start-up is also investigated at the high temperature cooling test condition. All experiments are performed in psychrometric calorimeter. The cooling capacity, power consumption, dehumidification capacity and cycle characteristics after start-up are analyzed.

• Korean Journal of Veterinary Research
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• v.17 no.1
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• pp.9-12
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• 1977

To study the effects of oxytocin and three parasympathomimetic drugs such as neostigmine, bethanechol, and pilocarpine in reduction of interval between birth and incidence of intrapartum stillborn pigs, 213, sows and gilts which had been kept under the same condition, were randomly allotted to 4 treatment and one control groups. The side reactions of three parasympathomimetic drug were also examined. The results obtained were summarized as followings. 1. Parasympathomimetic-treated groups revealed tendence to shorter interval between birth than oxytocin-treated or control groups. 2. Stillbirth rate per litter was significantly less (p<0.01) in the parasympathomimetic-treated groups than in the oxytocin-treated or control groups. 3. Moderate to severe salivation and vomiting were found in many clams of the pilocarpine-treated and bethanecol-treated groups. The neostigmine-treated group showed nearly no side reaction and neostigmine found to the safest among three parasympathomimetic drugs.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2006.05a
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• pp.163-166
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• 2006

The purpose of the research is to assess the accuracy of steel bar detector among other nondestructive testing equipment. The result of previous research shows that the average errors of rebar detector are 14.7% for the cover depth, 2.3% for the rebar spacing, and 11% for the rebar diameter. But this experiment was performed at the laboratory and the mortar was used for covering the steel bars instead of concrete. In situ condition can be different from the laboratory's so the outcomes do not correspond with those of laboratory. This research was performed at the buildings to be reconstructed. Nondestructive and destructive testing can be performed side by side since the building if to be destroyed. Steel bar detector was operated on the beam and the column and concrete cover of those members was removed for the actual measurement of rebar depth, spacing, and diameter finally, presumed value can be directly compared with actual data.

• Journal of ILASS-Korea
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• v.4 no.3
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• pp.42-52
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• 1999

An effectiveness of thermal utilization of a dousing system in the 600 MW PHWR Nuclear Power Plant has been evaluated. The behavior and conditions of water droplet sprayed in a postulated accident conditions in containment configuration has been calculated. In this calculation, two pressure conditions with the consideration of obstruction area and containment wall effect has been established : one being the minimum containment pressure of 7 kPa(g) encountered for dousing shut off and the other being the containment design pressure 124 kPa(g). The results revealed that the effectiveness of the thermal utilization ranges from 93% to 97%. In the analysis on two cases without/with side wall effect in the containment building, the thermal utilization decreases with obstruction area from 89% to 85%, which satisfies the design criteria set for the containment pressure against the accident condition.

• Journal of the speleological society of Korea
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• no.5
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• pp.37-52
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• 1997

In Japan, on the volcanic line from Mt.Fuji to Hachijou Isl. in Pacific, we can see the many fissure erupted craters. The fissure eruption hasn't always left the rift caves. Recently I am investigated this era and recognized the rift caves. at Mt. Fuji 4. Miyake Isl. 3, Hachijou Isl. 3. The time of fissure eruption in Miyake Isl. make the long crack and gush the lava flow. But. we can see the rift caves only in the caldera. In the rift caves, we can see the thin coated lava on the scoria wall of the cavity and not only the side ways to extend by gasic pressure, on the surface of the earth. It is tow type rift caves. 1) The gas run to the side direction and built the cavities and after blowout the ground. 2) The gas built the cavity and then blowout the earth. I think that the thick scoria layers the most important factor and indispensable condition to built the rift caves.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.16 no.8
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• pp.770-777
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• 2004

Fouling and cleaning tests are performed for a uniquely designed 7,000 ㎉/hr fluidized bed heat exchanger for exhaust gas heat recovery. Fuel rich condition is maintained in the combustor for a limited time period to generate soot that is to be deposited on the heat transfer surfaces (fouling) and 600 Um glass beads are circulated inside the heat exchanger system for cleaning and enhancing the heat transfer performance. According to the present experimental study, performance degradation mode could be monitored and the effect of particle circulation on the heat transfer improvement could be identified. Through the present study, it is demonstrated that circulating particles contribute not only to the fouling reduction in gas side, but also to the heat transfer enhancement of the unit, while other possible aging factors including water side corrosion seemed to contribute to the accumulated performance deterioration.

• Proceedings of the Safety Management and Science Conference
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• 2004.05a
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• pp.1-4
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• 2004

Need safety diagnostic indicator pointer that is objective as estimation basis to be scientific and manages systematically safety existing condition and level for city gas facilities. Safety diagnostic indicator pointer can divide by greatly two. One is management (Software) side that one that differ with mechanical (Hardware) side that handle laying stress on equipment connected with safety manages organization and management connected with safety. Weight appropriates according to specific gravity that relevant element occupies in facilities. To give so big value in particular element in grant of weight pays attention because break balance of whole guideline and should gives. Finally, efficient safety net may see effect before self-regulation inside by minimum target establishment by government and legal, systematic countermeasure establishment for this, strict law application and each business proprietor and though activity and user's active safety activity forms harmony properly.

• The Journal of Sustainable Design and Educational Environment Research
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• v.2 no.2
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• pp.15-33
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• 2002

This study purpose is extract on the architectural principles and architectural planning direction for existing school facility renovation. therefore, This study is occur to renovation from change factor and change direction of the school facility under prerequisite, school facility change direction is with a pedagogy side and it classified with the social side which it bites and it presented. School facility renovation extracted a plan principles with the base which will reach. Was extracted renovation plan Principles to analyze the interrelationship of necessary condition of school facility, It follows in renovation principle presented the renovation plan direction 61 branch.

• Journal of architectural history
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• v.7 no.2 s.15
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• pp.49-62
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• 1998

The character of spatial organization in rtaditional house is found through the analysis of field survey and measure of its micro climate in hot weather period of summer. The mean temperature of interior space is higher than outside space of the house. In the point of structural conditions, inside of Choga in caustal and mountain area is cooler than any other houses. In inland area, slate roof house is cooler than Choga. In mountain area, the thermal difference of inside and outside in Kyubjib is higher than Hotjib. In the point of spatial conditions, kitchen is the coolest space and very suitable for spatial organization. Anbang is the hottest space because of its centeral position in the house. In wind condition, mountain area is windy and caustal area is calm. Around the house the rear side of the house is windy and left side is calm.

• Journal of Industrial Technology
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• v.20 no.B
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• pp.21-26
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• 2000

Heat loss, fin effectiveness and efficiency of a plate fin are investigated as a function of non-dimensional fin length and Biot number using a two-dimensional separation of variables method. The value of temperature of the left side is set to be different from that of the right side for this plate fin to satisfy the real physical condition. Also temperature distribution within this plate fin is listed. One of the results shows that the fin can be considered to be useful in view of fin effectiveness on the given range of Biot number when non-dimensional fin length is larger than 3.