• Proceedings of the Korean Society of Precision Engineering Conference
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• 1997.10a
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• pp.1022-1027
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• 1997

The grinding operation is an important machining process for machining of final surface. However. grinding process has inevitable troubles such as loading and glazing for grinding wheel. It is, therefore, an essential research theme to determine the wheel life and the dressing timefor efficient grinding. In this study, AE signals (AEavg) generated in thc grinding operation were measured and the dressing time was determined from the analysis of the AEavg value. To verify the propriety of the obtained result. the AE signals measured on the grinding and the dressing operation were compared with the grinding force signals and the dressing force which were measured at same time. From the obtained result, it was confirmed that the determination of the wheel life and the dressing time by the AE measurement technique proposed in this study can be practically used.

• Archives of Plastic Surgery
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• v.45 no.3
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• pp.266-270
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• 2018

Background Skin grafting is a commonly performed operation in plastic and reconstructive surgery. The tie-over dressing is an effective technique to secure the grafted skin by delivering persistent downward pressure. However, if an additional dressing is required due to incomplete graft healing, the process of re-implementing the tie-over dressing may be frustrating for both patients and surgeons. Therefore, we introduce the double tie-over dressing, which readily allows for an additional tie-over dressing after the first dressing, and we present a comparison of its effectiveness with that of the simpler bolster dressing. Methods Of 128 patients with a skin defect, 69 received a double tie-over dressing and 59 patients received a simple bolster dressing. Using the independent t-test, the mean healing time, which was defined as the mean time it took for the wound to heal completely so that no additional dressing was required and it was washable with tap water, was compared between the 2 groups in both the head and neck region and in other areas. Results The mean healing time for the head and neck region in the double tie-over dressing group was $9.19{\pm}1.78days$, while it was $11.05{\pm}3.85days$ in the bolster dressing group. The comparison of the 2 groups by the independent t-test revealed a P-value of 0.003 for the mean healing time. Conclusions In the head and neck area, the double tie-over dressing required less time to heal than the simple bolster dressing.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.5
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• pp.95-102
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• 2002

The grinding operation is an important machining process for machining of final surface. However, grinding process has inevitable troubles such as loading and glazing for grinding wheel. It is, therefore, an essential research theme to determine the wheel life and the dressing time for efficient grinding. In this study, AE signals (AEavg) generated in the grinding operation were measured and the dressing time was determined from the analysis of the AEavg value. To verify the propriety of the obtained result, the AE signals measured on the grinding and the dressing operation were compared with the grinding force signals and the dressing force which were measured at same time. From the obtained result, it was confirmed that the determination of the wheel life and the dressing tilde by the AE measurement technique proposed in this study can be practically used.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.108-113
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• 2005

In this study, rotary type diamond dressing system for ultra-precision centerless grinding for ferrule was developed at the first time and experiments were conducted with AE sensor and hall sensor system to verify the optimum dressing condition for ultra-precision centerless grinding for ferrule. The correlations with the condition of dressing are evaluated by AE signal analysis with root mean square (RMS) and frequency analysis. And current signals from hall sensor are also studied as a factor of dressing optimum condition selection. Dressing process was conducted to investigate the effects of depth of cut, rotating speed, and the number of overlap to select the optimum condition of rotary dressing system of ultra-precision centerless grinding machine for ferrule fabrication. In order to verify the optimum condition of dressing, AE and current signals were compared with the surface quality of dressing wheel and grinding wheel for ultra-precision ferrule grinding. All of these experiments were completed by Taguchi Methodology to reduce experimental time. Hence, the optimum condition of rotary dressing system for ultra-precision centerless grinding for ferrule fabrication can be selected following to the experiment result from signals of AE and hall sensor.

• Journal of the Korean Society for Precision Engineering
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• v.20 no.7
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• pp.63-69
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• 2003

Through the previous works, it was found that the laminated grinding wheel is more efficient to generate smoother surface in short time than general grinding wheels. But, if the laminated grinding wheel is easily worn-out, it is impossible to apply this wheel in the real grinding process, because the periodic time for dressing is closely linked to the productivity of the process. So, it is required to investigate the wear of the laminated grinding wheel fer studying the periodic time for dressing. But it is difficult to analyze the dressing period quantitavely. Therefore, in this study, periodic times for dressing of the laminated grinding wheel and general grinding wheel are deduced from the relationship between the wear of grinding wheels and the surface roughness changes according to the number of traverse in cylindrical traverse grinding through experiments. This study shows that there are some differences in the wheel wear mechanisms between the general and laminated grinding wheels. As a result, it is also found that the periodic time for dressing of the laminated grinding wheel is longer than that of the general grinding wheel.

• Journal of Korean Foot and Ankle Society
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• v.12 no.2
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• pp.156-162
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• 2008

Purpose: Open fractures of the foot and ankle require prompt repair of the wound due to the complexity of anatomy, insufficiency of soft tissues and inadequate blood supply. Early flaps and skin grafts are used for this purpose yet general condition of the patient as well as local wound environment often precludes such treatment options. Vacuum- Assisted Closure (VAC) is recently being used in such cases. This study was done to validate the use of VAC together with silver antimicrobial dressing materials in contaminated open fracture wounds. Materials and Methods: We have selected 10 patients with Gustillo-Anderson type III open fractures of the foot & ankle treated with VAC and silver antimicrobial dressing materials from March 2007 to January 2008. The relationship between duration of treatment with wound size, contamination, and degree of soft tissue damage was analyzed. Results: The average age of patients was 36.6 years. The average amount of VAC application time was 23.4 days. Silver dressing materials were used for 16.8 days. Average wound healing time was 51.9 days. Statistically significant relationship was found between wound size, VAC application time and silver dressing material application time. No complications such as osteomyelitis were found after treatment. Conclusion: VAC technique is recently being used in open fractures with wide skin and soft tissue defects, producing good results. A wide array of dressing materials such as silver dressing is in development. We have incorporated the VAC technique together with silver dressing materials in the treatment of open fractures and achieved complication free results.

• Journal of Korean Academy of Fundamentals of Nursing
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• v.5 no.2
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• pp.181-195
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• 1998

This study is to evaluate the decubitus ulcer healing effect of occlusive dressing with hydrocolloid and traditional dry dressing for home care nursing clients. Study design was quasi-experimental pre-post test design. Control group(15 person) was treated decubitus wound with traditional dry gauze dressing, and experimental group(17 persons) was treated decubitus ulcer with occlusive dressing with hydrocolloid and calcium alginate(17 persons). Study period was from 8/1/97 to 12/31/97. Subject subjects was 17 males and 15 females with 2nd phase over decubitus ulcer aged 30 to 70 who have been registered as home care nursing clients in Nurse's Association in Seoul city. Outcome variables were stages, size of decubitus ulcer, pain at dressing time and exudate amount. Study result as follows. Occlusive dressing with hydrocolloid was superior to traditional gauze dressing decreasing ulcer size and phase, and shortening treatment period. Dressing change of occlusive dressing was easier than that of traditional gauze dressing. In conclusion, occlusive dressing was recommended to treat decubitus ulcer in home care patients even if hydrocolloid is expensive to gauze dressing because of treatment effect and easeness of dressing.

• Proceedings of the Korean Society of Machine Tool Engineers Conference
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• 1995.03a
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• pp.17-23
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• 1995

This paper describes investigation of the dressing time by laser in the surface grinding operation. Always dressing work is done before grinding operation. And then generates wear and roading on the wheel by contact between the grinding performance but also ground surfaces. On these states dressing work is needed. On this paper contour of the wheel by He-Ne laser is measured. It has also been found that the wheel deflection reduces the actual depth of cut and the roughness of the ground surface.

• Korean journal of food and cookery science
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• v.25 no.1
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• pp.39-44
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• 2009

This study was conducted to find an efficient use for cashew. It presents fundamental data on the quality and sensory characteristics of dressings made with cashews. The color L, a value of the dressing significantly decreased with increased storage time. Color b value and viscosity of the dressing significantly increased with storage time. The acceptance of cashew dressings and foods was evaluated. The C45-3 sample received the highest score for overall preference in a sensory evaluation of the dressing. The foods received a relatively high acceptance rating. Chicken and fish cutlets received higher scores than other food. It is anticipated that cashew will be utilized as a new raw material for healthy dressing.

• Journal of the Korean Society for Precision Engineering
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• v.8 no.2
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• pp.106-113
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• 1991

A diamond grinding wheel is generally used to grind hard and brittle materials, such as advanced ceramics. It is, however, quite difficult to dress a diamond grinding wheel efficiently because of its high degree of hardness. In this study, some investigations are carried out to increase dressing efficiecy of resinoid bonded diamond grinding wheel. Dressing forces are measured over a wide range of dressing conditions, and SEM observation of a grinding wheel is carried out. Special attention is paid to comparison between stick method and rotary brake method. Results obtained in this study provide useful information determining reguired dressing time, and for choosing efficient dressing condition for diamond grinding wheel.