• Korean Journal of Poultry Science
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• v.40 no.3
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• pp.277-281
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• 2013

The experiment was undertaken to see the effects of Bacillus sp. on the growth performance and disease resistance to Salmonella sp. infections. The use of probiotic microbes in poultry is commonly practiced. In this study, Bacillus subtilis was tested using a total of 120 chicks of age of 1 day after hatching. The growth traits examined were body weight gain and feed conversion rate. And also, the Salmonella resistance of Bacillus subtilis was tested after the chicks were orally administered with Salmonella pullorum by gavage force injections. The result showed that Bacillus subtilis yielded a high feed efficiency, consequently increased growth rate. For the effect of Bacillus subtilis on Salmonella infection, Bacillus subtilis significantly improved the resistance to Salmonella pullorum infection. Various clinical symptoms of Salmonella infection were highly decreased by addition of Bacillus sp.

• Journal of Sasang Constitutional Medicine
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• v.21 no.1
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• pp.63-78
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• 2009

1. Purpose This study has focused on response rates of the questionnaire which considered as a basic data to identify constitution for American. 2. Methods By analysing the tendency of the respondents who has defined constitution by clinical diagnosis and comparing of their answers, the result of their constitution analysis by our questionnaire were re-examed. The answer of each question to each constitution were tested how it is relevent to a scale of a constitution. Each item response rate on SF_SSCQ-A was analysed about those who had been tested and diagnosed as Taeyangin, Soyangin, Taeeumin, Soeumin respectively. 3. Results There were the 55 significant items; 13 Taeyangin items, 13 Soyangin items, 20 Taeeumin items, 9 Soeumin items. However, there were the 11 low response rate items (below 10 %) and 4 no response items.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.29 no.1 s.232
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• pp.35-45
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• 2005

TR-E2 configuration designed by Bell Textron was tested in KARI 1-m wind tunnel. To explore aerodynamic characteristics for the given configuration, a $12\%$ scaled model was fabricated and tested. Wind tunnel test for TR-E2 had been performed by changing the incidence angles of wing and deflection angles of control surfaces. Test result showed that the lower wing incidence angle has more favorable lift to drag ratio compared with original design. Longitudinal and directional characteristics of TR-E2 were found to be stable for the pitch and yaw motions. However, the lateral stability of TR-E2 is not stable for certain control surface deflection.

• Membrane Journal
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• v.3 no.1
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• pp.22-28
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• 1993

Fabrics of polyester, polyacrylics, nylon and cotton were tested to investigate the possibility. of using these matehals as a membrane support sheet. Considering the physical properties such as compaction rate, membrane embossing, water flux, the chemical and mechanical properties, 50 denlet polyester fabrics was found to be the appropriate material as a membrane support sheet among the tested materials. The experimental parameters such as pressure drop, compression pressure and viscosity were changed to investigate the effects of these parameters on the flow patten in this membrane support sheet. As a result, it was shown that Darcy's law could be satisfactorily applied to describe the flow pattern in this membrane support sheet.

• Proceedings of the Korea Concrete Institute Conference
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• 1997.04a
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• pp.341-348
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• 1997

Fibers have been used to improve the tensile strength or toughness of concrete. Therefore many different kinds of fibers have been developed and tested to reinforcing concrete. Basalt fiber is one of the recently developed materials for this purpose. Basalt fibers have the advantage which is the fiber itself is a same kind of material as concrete. In this study, fiber length change, orientation of fiber, the strength properties of fiber reinforced concrete have been tested. The test result show that as the amount of fiber increases, 1) workability of concrete has been reduced significantly, 2) the length of fiber reduced down to less than 4mm, 3) orientation factors are between 0.248 and 0.350, 4) compressive strength and elastic modulus have been increased significantly, however, the other strength have not increased significantly.

• Proceedings of the KIEE Conference
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• 2000.07b
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• pp.738-740
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• 2000

This paper presents the design process for series wound DC motor with the brush by using the experimental data of a tested motor. The design parameters calculated from the experimental data are friction loss. windage loss and contact resistance of brushes. The characteristic analysis of the designed motor is performed and then the proposed method is verified by comparing with experimental result.

• Proceedings of the KIEE Conference
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• 1998.07a
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• pp.40-42
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• 1998

The levitation magnets for the UTM-01(Urban Transit Maglev) take up a substential portion of the vehicle weight and vehicle cost. It is thus very important to reduce the weight of magnets by improving their performance and also reduce the cost of making them. A very extensive study was conducted to achieve above goals. Shape of the magnet core was varied and various core materials were tested. Also tested was the anodized sheet coil to replace the currently used rectangular shape Al coil. The study so far has improved the performance of the magnet substantially. The levitation force-to-magnet weight ratio has been improved from 6.8 to 9.2 as a result. This improvement reduced to magnet weight of the UTM-01 test vehicle by 900 kg.

• Proceedings of the KSME Conference
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• 2004.04a
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• pp.1412-1417
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• 2004

Concentric annular heat pipes having the length of 200 mm and the outside diameter of 25.4 mm were manufactured and tested. The inside diameters of the heat pipes were 11.3 mm and 8.1 mm and the material of the container was copper. To compare with thermal performances between the concentric annular heat pipe and a copper block with same shape, start-up and isothermal performance were tested. In the result, the start-up of the concentric annular heat pipe was influenced by the start-up of their heat source. The concentric annular heat pipe reached at steady state faster then the same shape of copper block. The maximum wall temperature difference of the concentric annular heat pipe on whole surface was $4.6^{\circ}C$, and the case of the copper block was $16.5^{\circ}C$.

• Proceedings of the Optical Society of Korea Conference
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• 2008.07a
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• pp.119-120
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• 2008

A HMD type multi-focus 3D display system is developed and proof about satisfaction of eye accommodation is tested. Four LEDs(Light Emitting Diode) and a DMD are used to generate four parallax images at single eye and any mechanical part is not included in this system. The multi-focus means the ability of monocular depth cue to various depth levels. By achieving multi-focus function, we developed a 3D display system for only one eye, which can satisfy the accommodation to displayed virtual objects within defined depth. We could achieve a result that focus adjustment is possible at 5 step depths in sequence within 2m depth for only one eye. Additionally, the change level of burring depending on the focusing depth is tested by captured photos and moving pictures of video camera and several subjects. And the HMD type multi-focus 3D display can be applied to a monocular 3D display and monocular AR 3D display.

• Journal of the Korean Solar Energy Society
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• v.28 no.2
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• pp.34-41
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• 2008

A low-temperature solar thermal system assisting a biological nitrogen treatment reservoir was designed and field-tested. A large tank whose temperature was maintained at about $25-30^{\circ}C$ to enhance the performance of a biological nitrogen treatment process was heated by an array of flat plate solar collectors. Test results revealed that the overall collector efficiency was above 50% for the most cases tested. This high efficiency was possible owing to the relatively low collector temperature that can be traced back to the reservoir temperature. A substantial enhancement in nitrogen treatment was observed as a result of maintaining the reservoir temperature higher.