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RISS 인기검색어
- 검색키워드
- 저자 : Bona Shin (검색결과 6 건)
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Multidimensional analysis for fabric drapability
Bona Shin,윤창상 한국의류학회 2023 Fashion and Textiles Vol.10 No.1
This study analyzed fabric drapability in one, two, and three dimensions to provide an assessment method reflecting real conditions. One-dimensional analysis of drapability involved observing the fabric movement by reciprocating motion. The movement appeared differently depending on the fabric characteristics, and the shape and location of the node showed differently, which were considered to be influenced by the weight of the sample along with the drape coefficient. Two-dimensional analysis identified the significant factors for the drape information. This examination confirmed that, even if drape factors were similar, differences in draped shape were observed based on the factors related to node shapes. Three-dimensional analysis, using a 3D scanner, involved the use of the mean distances between draped samples and the standard truncated cone, their standard deviation, and the coefficient of variation. The coefficient of variation was high in the groups wherein the shape of the drape was irregular. In the 3D analysis, the distances between samples and the standard truncated cone were expressed in colors to intuitively deliver the drape information. To determine a factor that could indicate drapability among the factors derived from each dimension, the existing drape coefficient was employed for correlation analysis. Three pairs of samples with similar drape coefficients but different drape shapes were selected to verify the above results. In conclusion, one-dimensional node location, two-dimensional standard deviation of node severity, and three-dimensional coefficient of variation were shown to effectively demonstrate the drape characteristic that the drape coefficient could not indicate.
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신보나 ( Bona Shin ),유동주 ( Dongjoo Yu ),이소민 ( Somin Lee ),윤선영 ( Seonyoung Youn ),심명희 ( Myounghee Shim ),윤창상 ( Changsang Yun ) 한국의류학회 2021 한국의류학회지 Vol.45 No.5
This study proposes a simple drape measurement method for the 3D virtualization of garments. The proposed method uses angles or disks of different diameters to evaluate the drape properties easily. We divided 710 fabrics into ten groups based on the drape coefficient, of which 49.6% had drape coefficients of 30 or less. The drape properties were measured to classify the groups into smaller clusters using the angle formed when the center of the fabric was fixed. Accordingly, three clusters were formed for 60° and 100° angles. A method was devised using ten disks of different diameters to classify the remaining two clusters, except the cluster containing only the D10 group (D1-D5 and D5-D9). Three criteria-grade match, a sum of deviation, and standardization of deviation-were used for the classifications. The discriminative ability between groups was high for D1-D5 with disks with 24.0 and 25.5 cm diameters. Furthermore, a disk with a diameter of 16.5 cm was effective for D5-D9. The three-dimensional drape shapes were unique for the ten groups, which can be utilized as fundamental data for 3D virtualization.
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Considerations during crown reattachment procedure over the pulpal exposure: case report
Bona Kim,Yoon Lee,Min-Ju Song,Su-Jung Shin,Jeong-Won Park 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.4
Crown reattachment is the most conservative treatment which can be used to restore fractured tooth, presumably with sufficient strength, while maintaining original contour, incisal translucency, and reducing chair time and cost. However, in case of crown fracture with pin-point pulp exposure, we should cautiously minimize the irritation to the pulp and consider pre-treatment pulpal status, choice of pulp capping materials, choice of bonding system and treatment sequence during crown reattachment procedures. This case reports the considerations while crown reattachment with direct pulp capping using calcium hydroxide (Dycal, Dentsply Caulk).
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Triple antibiotics와 관련한 치아 변색의 예방
김보나,송민주,신수정,박정원 大韓齒科保存學會 2012 Restorative Dentistry & Endodontics Vol.37 No.2
Regenerative endodontics has a potential to heal a partially neecrotic pulp, which can be beneficial for the continued root development and strengthening of immature teeth. For this purpose, triple antibiotic mixture of ciprofloxacin, metronidazole, and minocycline was recommended as intracanal medicament in an attempt to disinfect the root canal system for revascularization of a tooth with a necrotic pulp. However, discoloration of the tooth was reported after applying this. This case shows the idea for preventing the tooth discoloration using a delivery syringe (SW-0-01, Shinwoo dental) to avoid the contact between the clinical crown and the antibiotics.
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Considerations during crown reattachment procedure over the pulpal exposure: case report
Kim, Bona,Lee, Yoon,Song, Min-Ju,Shin, Su-Jung,Park, Jeong-Won The Korean Academy of Conservative Dentistry 2012 Restorative Dentistry & Endodontics Vol.37 No.4
Crown reattachment is the most conservative treatment which can be used to restore fractured tooth, presumably with sufficient strength, while maintaining original contour, incisal translucency, and reducing chair time and cost. However, in case of crown fracture with pin-point pulp exposure, we should cautiously minimize the irritation to the pulp and consider pre-treatment pulpal status, choice of pulp capping materials, choice of bonding system and treatment sequence during crown reattachment procedures. This case reports the considerations while crown reattachment with direct pulp capping using calcium hydroxide (Dycal, Dentsply Caulk).
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이소민 ( Somin Lee ),유동주 ( Dongjoo Yu ),신보나 ( Bona Shin ),윤선영 ( Seonyoung Youn ),심명희 ( Myounghee Shim ),윤창상 ( Changsang Yun ) 한국의류학회 2021 한국의류학회지 Vol.45 No.6
This study aims to propose a prediction model for the drape coefficient using artificial neural networks and to analyze the nonlinear relationship between the drape properties and physical properties of fabrics. The study validates the significance of each factor affecting the fabric drape through multiple linear regression analysis with a sample size of 573. The analysis constructs a model with an adjusted R<sup>2</sup> of 77.6%. Seven main factors affect the drape coefficient: Grammage, extruded length values for warp and weft (m<sub>warp</sub>, m<sub>weft</sub>), coefficients of quadratic terms in the tensile-force quadratic graph in the warp, weft, and bias directions (c<sub>warp</sub>, c<sub>weft</sub>, c<sub>bias</sub>), and force required for 1% tension in the warp direction (f<sub>warp</sub>). Finally, an artificial neural network was created using seven selected factors. The performance was examined by increasing the number of hidden neurons, and the most suitable number of hidden neurons was found to be 8. The mean squared error was .052, and the correlation coefficient was .863, confirming a satisfactory model. The developed artificial neural network model can be used for engineering and high-quality clothing design. It is expected to provide essential data for clothing appearance, such as the fabric drape.
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