• Conservation Science in Museum
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• v.11
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• pp.17-30
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• 2010

Here is an introduction of the conservation process and storing method of 26 garments for exhibition among the excavated garments of Cheonngyeongunju(a princess) preserved in the National Museum of Korea. Before processing, the artifacts were investigated to find out the type of material and the damaged parts, and then surface and wet cleaning were conducted. After that, it were dried and fixed while held by hand for stability of the artifacts. When stored, the artifact was folded minimally in large parts to prevent damage and placed in a neutral box with buffers in between.

• Journal of Korea Multimedia Society
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• v.14 no.5
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• pp.632-641
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• 2011

This paper presents a position error recognition system when the wafer is mounted in cleaning equipment among the wafer manufacturing processes. The proposed system is to enhance the performance in cost and reliability by preventing the wafer cleaning system from damaging by alerting it when it is put in correct position. The proposed algorithm is in obtaining a mapping function from camera and physical wafer by designing and manufacturing the radial shape calibrator to reduce the error by using the conventional chess board one. The system is to install in-line process using high reliable and high accurate position recognition. The experimental results show that the performance of the proposed system is better than that of the existing method for detecting errors within tolerance.

• Journal of Preventive Medicine and Public Health
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• v.54 no.5
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• pp.376-379
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• 2021

Elemental mercury exposure can result in significant toxicity. Source decontamination and remediation are often required after larger elemental mercury exposures, but the details of these processes are infrequently reported. In the case described herein, a 64-year-old woman and her husband were exposed to elemental mercury in their home after the husband purchased it online for the purpose of recreational barometer calibration. After the mercury reportedly spilled during the calibration process, a vacuum cleaner was used to decontaminate the affected surface; this led to extensive mercury contamination of the home. The couple was relocated from the home while remediation occurred over the course of several weeks. Vacuum cleaning of an elemental mercury spill can lead to extensive volatilization and recirculation of mercury vapor. For smaller mercury spills, careful removal of visible mercury beads by using an eyedropper, cardboard, and masking tape is recommended. Larger spills require professional decontamination and remediation and may necessitate involvement of governmental resources. Vacuum cleaning should not be used as an initial method of decontamination after elemental mercury exposure. Careful attention to source decontamination can reduce the emotional and financial costs associated with extensive remediation after elemental mercury exposure.

• Journal of ILASS-Korea
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• v.28 no.3
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• pp.126-133
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• 2023

This study analyzes the flow characteristics and sponge ball recovery performance in a ball strainer according to vortex promoter design variables through flow-particle analysis based on actual experiments to derive a method for improving the recovery rate of cleaning sponge balls of CTCS applied to existing power plants. Based on the ball strainer in CTCS used in the power plant, the experiment was conducted by changing the design factor of the improved shape. In addition, flow and particle analysis were performed under the same conditions as the experiment to numerically the flow characteristics and recovery rate in the ball strainer according to the design factor of the vortex promoter. As a result of the study, it was confirmed that the recovery performance was improved by about 3% by changing the design height of the Vortex promoter. And when comparing the difference between maximum and minimum recovery rate, it was found that the effect on the recovery performance increased slightly according to the distance condition compared to the vortex promoter design height condition.

• Journal of Korean Society of Environmental Engineers
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• v.32 no.10
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• pp.957-964
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• 2010

The deactivated catalyzed diesel particulate filter-trap (DPF) was remanufactured by ultrasonic wave treatment with various prepared solutions, followed by active component re-impregnation, and the emission control performance and surface properties of remanufactured DPF were studied at various remanufacturing conditions. The proper ultrasonic wave cleaning time at various prepared solutions and optimal re-impregnation amounts of active component for the best emission control performance of DPF were investigated and its performance tests were also carried out with various temperatures for the conversions of CO, THC (total hydrocarbon) and PM (particulate matter) by catalytic reaction test unit using bypass gas from the diesel engine dynamo system. It was found that the emission control performance of DPF remanufactured with the high-temperature air washing, ultrasonic wave cleaning at acid/base solutions and active component re-impregnation method was recovered to 95% level of its activity compared to that of the fresh DPF, which was caused by removing the deactivating materials from the surface of the DPF, through the analyses of performance test and their surface characterization by Optical microscope, EDX, ICP, TGA, and porosimeter.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.495-498
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• 1998

Mobile computers have restrictions for size, weight, and power consumption that are different from traditional workstations. Storage device must be smaller, lighter. Low power consumed storage devices are needed. At the present time, flash memory device is a reasonable candidate for such device. But flash memory has drawbacks such as bulk erase operation and slow program time. This causes of worse average write performances. This paper suggests a storage method which improves write performance.

• Journal of the Korean Vacuum Society
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• v.4 no.S1
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• pp.1-6
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• 1995

Polycrystalline Si films have been used in many applications such as thin film transistors(TFT), image sensors and LSI applications. In this research deposition of Si films at low temperatures with remote plasma enhanced CVD from Si2H6-SiF4-H2 on SiO2 was studied and their crystallinity was investigated. It was condluded that growth of crystalline Si films was favorable with (1) low Si2H6 flow rates, (2) moderate plasma power, (3) moderate SiF4 flow rates, (4) moderate substrate temperature, and (5) suitable method of surface cleaning.

• Textile Coloration and Finishing
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• v.12 no.3
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• pp.183-191
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• 2000

The dyeing of silk fabric with chinese scholar tree extract was investigated. The colorant was extracted with distilled water, and concentrated under reduced pressure, and, finally spray-dried. The optimum temperature and dyeing time for the dyeing of silk with the scholar tree extract was $60^\circ{C}$ and 60 minutes respectively. In mordant dyeing, pre-mordanting method was most effective for color yield, and 1~2 % of mordant concentration was acceptable. Fastness of the dyed silk fabric to laundering and rubbing was shown to be good, but fastness to light, dry cleaning, and perspiration were varied with used mordants.

• Proceedings of the KSR Conference
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• 2008.11b
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• pp.561-566
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• 2008

The EMU of maintenance technique or system is changing on a large scale. To subway operation beginning the breakdown was born and every that time after the fact repaired. But, recently before the breakdown of the subway occurs, repairs in advance with the preventive maintenance concept which was exchanged. However, the preventive maintenance is to readjust, cleaning, tighten and the oil the repetition by the worker simple experience. This study on introduces the EMU of maintenance method which applies a automatic inspection equipment from the study contributing which develops the preventive maintenance system.

• Nuclear Engineering and Technology
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• v.51 no.2
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• pp.641-645
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• 2019

Experimental equipment for studying the sorption properties of iodine sorbents using radioactive methyliodide has been developed. The sorption capacity index ${\alpha}$ is proposed as a criterion parameter for assessing the quality of impregnated activated charcoals. It was found that this parameter does not depend on the dynamic conditions during the sorbent test. It was shown that values of the sorption capacity index allow to recommend iodine sorbents for industrial gas cleaning processes.