• Journal of the Korean Society of Manufacturing Process Engineers
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• v.15 no.2
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• pp.46-50
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• 2016

When rotating the clutch drum in the power take-off (PTO) gear box of an armored recovery vehicle, lots of inner oil is drained through the adapter by centrifugal force. Therefore, a lack of lubrication is caused by inner oil loss, and the bearing is damaged by overheating. This study, therefore, aims to design an oil-controlling adapter by using shape alteration to prevent oil loss. Both the original and improved adapters were tested at 1,800rpm by using an operational test machine. When applying the original adapter to the gear box, the bearing was damaged by overheating, which was caused by the lack of lubrication. When applying the improved oil-controlling adapter, on the other hand, it prevented the loss of inner oil. Applying the improved adapter is expected to prevent the overheating caused by lack of lubrication.

• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2000.10a
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• pp.333-339
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• 2000

This study was performed to investigate the performance of heat recovery device attached to exhaust gas funnel connected to combustion chamber of greenhouse heating system. The experiment heat recovery system is mainly consisted of LPG combustion chamber and two heat recovery units; unit-A is attached directly to the exhaust gas funnel, and unit-B is connected with unit-A. Heat recovery performance was evaluated by estimating total energy amount by using enthalpy difference between two measurement points together with mass flow rate of gas and/or air passing through each heat recovery unit depending on 5 different flow rates controlled by voltage meter. The results of this experimental study, such as heat exchange behavior of supply air pipes and exhaust air passages crossing the pipes, pressure drop between inlet and outlet, heat recovery performance of exchange unit, etc., will be used as fundamental data for designing optimum heat recovery device to be used for fuel saving purpose by reducing heat loss amounts mostly wasted outside of greenhouse through funnels.

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.07a
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• pp.248-248
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• 2004

• 한국초전도학회:학술대회논문집
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• 2009.07a
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• pp.82-82
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• 2009

• Journal of Information Technology Services
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• v.7 no.2
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• pp.181-195
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• 2008

The rapid growth of mobile communication technology has provided the expansion of mobile internet services, particularly mobile realtime transaction takes much weight among mobile fields. There is an increasing demand for various mobile applications to process transactions in a mobile computing fields. Thus, During transmission in wireless networks a base station failure inevitably causes data loss of the base station buffer. It is required to compensate the loss for communication. The existing methods for a base station failure are not adequate because they all suffer from too much overhead and resolve only the link failure. In this paper, we study an efficient recovry systems for a mobile DBMS. We propose SLL (Segment Log List) that enables the mobile host to compensate data loss efficiently in the case of base station failure. In SLL, a base station deliveries an output information of data cells to a mobile host. when a base station fails, the mobile host can retransmit just next data cells. We also prove the efficiency of new method.

• Fashion & Textile Research Journal
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• v.3 no.4
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• pp.367-372
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• 2001

Five kinds of commercial ramie and hemp fabrics were treated with cellulase under different concentrations. Samples were mercerized before enzyme treatment to investigate the effect of mercerization on cellulase enzyme treatment. Physical characteristics(weight loss, tear strength retention, wrinkle recovery, drape stiffness, dyeability) of cellulase enzyme treated and untreated samples were measured and compared. X-ray diffractions were examined to verify if there were any changes in their crystallinity of enzyme treated fabrics. Weight loss, wrinkle recovery and degree of crystallinity increased as the concentration of cellulase enzyme increased. In the meanwhile, tear strength retention and drape stiffness and dyeability decreased. Enzyme activity was more effective on mercerized samples. Particularly, there was distinct tendency to increase weight loss and flexibility.

• Journal of Sasang Constitutional Medicine
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• v.23 no.3
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• pp.419-428
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• 2011

1. Objective: The aim of this study was to report significant improvement of tinnitus and insomnia after treatment with Cheongsimyeonja-tang in a Taeeumin patient with Idiopathic Sudden Sensorineural Hearing Loss(SSHL) that accompanied with Tinnitus. 2. Method: We measured the hearing recovery. For diagnosis on this case, pure tone audiometry was used. The degree of improvement was evaluated by Siegel's Criteria. Visual Analogue Scale(VAS) and Tinnitus Handicap Inventory(THI) were also used to assess tinnitus objectively. 3. Result: There was no improvement in pure tone audiometry by Siegel's Criteria. However, VAS score was decreased from 10 to 1 and THI score was also decreased from 74 to 48. 4. Conclusion: A patient with SSHL, who has little possibility of recovery of hearing loss, was treated with Cheongsimyeonja-tang in a short period and significant improvement in tinnitus and insomnia was observed. We consider that consistent treatment of Cheongsimyeonja-tang can contribute to improve the hearing loss.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1193-1196
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• 2007

A new planar transformer type energy recovery circuit for PDP is proposed in this paper. The same current is transferred through both the primary and secondary sides during the energy recovery period. The conduction loss is reduced. Fabrication through simple manufacturing processes is possible using the PCB winding.

• Nuclear Engineering and Technology
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• v.56 no.2
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• pp.685-687
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• 2024

Fiber optic cables are used extensively for remote monitoring in applications under extreme conditions, such as at high temperatures or in ionizing radiation fields. When high temperature fiber optic cables were subjected to gamma irradiations, there was a significant loss in transmission at wavelengths < 350 nm after only 1 minute of irradiation. Negligible recovery of the fiber optic transmission with time was observed over 2 years, but the irradiation damage was almost completely reversed by high temperature annealing at 400 ℃.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.37 no.3
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• pp.66-71
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• 2000

A new Soft Recovery Quasi-Resonant Converter (SR QRC) haying multiple order folding snubber network is proposed. It is combined with normal quasi-resonant converter with folding snubber network of which the surrounding components are composed of diodes and capacitors. The reverse recovery loss of main rectifier diode is eliminated by this method utilizing multiple resonance. The proposed converter has PWM capability with high efficiency and is suitable for high voltage and high power applications. By extension of this concept to other switching converters, a new family of SR PW QRC may be developed.