• Journal of Korea Foundry Society
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• v.20 no.6
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• pp.359-367
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• 2000

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11b
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• pp.156-159
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• 2002

This study reports on physical properties of the noise radiation caused by expansion of exhaust gas and vibration of pumps according to change of vaccum degree. The fundamental responses show that the sound power level radiated is proportional to the common logarithm of the degree of vaccum.

• Journal of Physiology & Pathology in Korean Medicine
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• v.20 no.5
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• pp.1223-1225
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• 2006

The purpose of this study was to examine the effects of enlarging the breast by the B-secret I , II( vaccum vibrator) in women. This study was one group in a pre-test / post-test desgian with repeated measures. The experimental group of 30 patients were selected through sampling from L-oriental medicine in the P-city. The subjects received B-secret 1 , 11 ( vaccum vibrator) for 15 - 20minutes / 1 day during three months . All of the subjects were examined on the volume-size of the breast & the degree on the improvement. Prior and post surveys were measured before and after the experiment. The volume and size of the breast were measured the girth of the chest on the breast and below breast, the range on nipple and the middle point of the clavicle, the range on nipple and the middle point of the sternum, the range out of two nipple, the lineal and obligue line distance on nipple and the under crumples of breast, the height on the nipple and the under crumples of the breast, the diameter of the girth of nipple. As the effect on enlargement and the degree on the improvement of breast by B-secret 1 , 11 ( vaccum vibrator) were observed the girth of the chest on the breast, the range on nipple and the middle point of the clavicle, the range on nipple and the sternum, the height on the nipple and the under crumples of the breast.

• Proceedings of the Korean Vacuum Society Conference
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• 1996.06a
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• pp.63-64
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• 1996

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2000.11a
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• pp.453-456
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• 2000

This paper presents experimental results on selecting optimal process parameters for UV-Vaccum casting. The UV-Vacuum casting is a relatively new process that allows very rapid mold preparation and part duplication via UV curing. Effect of various process variables such as pressure and temperature on mold strength and part accuracy was evaluated by using Taguchi method.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2002.11a
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• pp.322.1-322
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• 2002

국내외의 반도체 회사의 반도체 제작공정에서 여러 종류의 가스를 흡입하여 웨이퍼의 증착에 이용하게 되는데 각각의 과정에서 요구되는 진공도를 유지하기 위하여 사용되는 것이 드라이 진공펌프이다. 이때 사용되는 질소가스의 흡입압력에 의해 발생되는 진공도의 변화에 따른 진공펌프의 소음 특성을 실험을 통해 분석하였다.

• Proceedings of the KIEE Conference
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• 2002.04a
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• pp.61-63
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• 2002

This paper deals with the design of vaccum pump using moving magnet type linear oscillaory actuator based on the design procedure and the characteristic analysis. To improve the starting characteristic, the optimum spring constant is detected and redesigned. The parameter was calculated by Finite Element Method(FEM). In order to dynamic characteristic analysis. Time difference method with voltage and kinetic equation is used.

• Journal of the Korean Society of Safety
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• v.18 no.3
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• pp.64-68
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• 2003

ITO_{(n)}/Si_{(p)}$ solar cell is fabricated by vaccum deposition method under the resistance heating with substrate temperature kept about 200[$^{\circ}C$] and than their properties are investigated. The maximum output of fabricated solar cell is obtained when the composition of the thin film is consisted of indium oxide 91[mole %] and tin oxide 9(mole %). The solar cell electrical charateristics can be improved by annealing but are deteriorated at temperature above 600[$^{\circ}C$] for longer than 15[min].

• Industry Promotion Research
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• v.1 no.1
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• pp.7-11
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• 2016

It was the electrical properties of IGZO prepared by the annealing in a vaccum and an atmosphere conditions to research the current-voltage characteristics. The IGZO film annealed in a vaccum became an amorphous structure but films annealed in an atmosphere condition had a crystal structure. Because of the content of oxygen vacancies during the annealing processes was changed, and the annealing in an atmosphere condition increased the oxygen vacancy in IGZO. Oxygen vacancy in IGZO increased the current and then it was observed the Ohmic contact at IGZO annealed in an atmosphere conditions. However, the IGZO prepared in a vaccum showed the Schottky contact.

• Proceedings of the KIEE Conference
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• 2002.07b
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• pp.811-813
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• 2002

This paper deals with the design of vaccum pump using moving magnet type linear oscillaory actuator based on the design procedure and the characteristic analysis. To improve the starting characteristic, the optimum spring constant is detected and redesigned. The parameter was calculated by Finite Element Method(FEM). In order to dynamic characteristic analysis, Time difference method with voltage and kinetic equation is used. The propritey of the improved model is verified through the experimental.