• Title/Summary/Keyword: interval dimension

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Development of the Standard Size Dimensions and Reference Sizes for Improving Size Suitability of Gloves (장갑치수적합성 향상을 위한 기본치수 및 참고치수 설정)

  • Kim, Eun-Kyong
    • Fashion & Textile Research Journal
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    • v.10 no.6
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    • pp.966-978
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    • 2008
  • The aim of this study was to provide size intervals in hand requisite in design of gloves. In this study, a survey was administered to gather information about glove manufacturers' sizing systems. In addition, KS glove standards' size dimensions were analyzed. As well, the ISO hand sizing system was also studied. Based on all the analyses' results, a new glove size intervals were composed. The size comprised the control dimensions of hand length and hand circumference. The size interval was 8mm in hand length and 13mm in hand circumference. The size range was established by making the coverage above 80%. The coverage of the new size interval system for an adult's hand was 86.4% and 13 sizes were suggested. The coverage of the male size system was 86.0% and 10 sizes were suggested. The coverage of the female size system was 87.6% and 8 sizes were suggested. For the unfitted gloves, size ranges based on hand length and hand circumference were developed. For the adults group, S, M, L, and XL were suggested and the coverage of the new size range was 78.8%. For the male group, S, M, and L were suggested and the coverage was 82.3%. For the female group, S, M, and L were also suggested and the coverage was 81.3%.

Comparing type-1, interval and general type-2 fuzzy approach for dealing with uncertainties in active control

  • Farzaneh Shahabian Moghaddam;Hashem Shariatmadar
    • Smart Structures and Systems
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    • v.31 no.2
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    • pp.199-212
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    • 2023
  • Nowadays fuzzy logic in control applications is a well-recognized alternative, and this is thanks to its inherent advantages. Generalized type-2 fuzzy sets allow for a third dimension to capture higher order uncertainty and therefore offer a very powerful model for uncertainty handling in real world applications. With the recent advances that allowed the performance of general type-2 fuzzy logic controllers to increase, it is now expected to see the widespread of type-2 fuzzy logic controllers to many challenging applications in particular in problems of structural control, that is the case study in this paper. It should be highlighted that this is the first application of general type-2 fuzzy approach in civil structures. In the following, general type-2 fuzzy logic controller (GT2FLC) will be used for active control of a 9-story nonlinear benchmark building. The design of type-1 and interval type-2 fuzzy logic controllers is also considered for the purpose of comparison with the GT2FLC. The performance of the controller is validated through the computer simulation on MATLAB. It is demonstrated that extra design degrees of freedom achieved by GT2FLC, allow a greater potential to better model and handle the uncertainties involved in the nature of earthquakes and control systems. GT2FLC outperforms successfully a control system that uses T1 and IT2 FLCs.

Accuracy and reliability of stitched cone-beam computed tomography images

  • Egbert, Nicholas;Cagna, David R.;Ahuja, Swati;Wicks, Russell A.
    • Imaging Science in Dentistry
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    • v.45 no.1
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    • pp.41-47
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    • 2015
  • Purpose: This study was performed to evaluate the linear distance accuracy and reliability of stitched small field of view (FOV) cone-beam computed tomography (CBCT) reconstructed images for the fabrication of implant surgical guides. Material and Methods: Three gutta percha points were fixed on the inferior border of a cadaveric mandible to serve as control reference points. Ten additional gutta percha points, representing fiduciary markers, were scattered on the buccal and lingual cortices at the level of the proposed complete denture flange. A digital caliper was used to measure the distance between the reference points and fiduciary markers, which represented the anatomic linear dimension. The mandible was scanned using small FOV CBCT, and the images were then reconstructed and stitched using the manufacturer's imaging software. The same measurements were then taken with the CBCT software. Results: The anatomic linear dimension measurements and stitched small FOV CBCT measurements were statistically evaluated for linear accuracy. The mean difference between the anatomic linear dimension measurements and the stitched small FOV CBCT measurements was found to be 0.34 mm with a 95% confidence interval of +0.24 - +0.44 mm and a mean standard deviation of 0.30 mm. The difference between the control and the stitched small FOV CBCT measurements was insignificant within the parameters defined by this study. Conclusion: The proven accuracy of stitched small FOV CBCT data sets may allow image-guided fabrication of implant surgical stents from such data sets.

Simulation of Interaction Forces between Two Ships Considering Ship's Dimension (선박의 크기를 고려한 두 선박의 간섭력에 관한 시뮬레이션)

  • Lee, Sang-Do
    • Journal of the Korea Society for Simulation
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    • v.26 no.3
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    • pp.47-54
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    • 2017
  • This paper analyzed the motion characteristics of two ships according to the ship's dimension using Ship Handling Simulator. When the panamax container ship passes the smaller ship, peak point and patterns of interaction forces for the moored ship are noticeable. Accordingly, special attention should be paid to the movements of moored ship because surge force and yaw moment changes in the opposite direction before and after condition of ship's beam. However, when the container ship passes the larger moored ship in reverse, peak point stood out on the passing ship at the beginning of ship-to-ship interaction and attraction force on the passing ship occurred steadily during 1L(length overall of passing ship) interval at a point of beam. In addition, as the lateral distance between the hull of two ships decreases less than 2B(breadth of passing ship), interaction forces on the passing ship at the beginning are sharply increase.

Echocardiographic Follow-up after Arterial Switch Operation for Transposition of the Great Arteries (동맥전환술을 시행한 대혈관전위 환자에서 심초음파를 이용한 술후 추적)

  • 한승세;정태은;이동협;오정훈;이정철
    • Journal of Chest Surgery
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    • v.34 no.10
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    • pp.754-762
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    • 2001
  • Background: To evaluate the efficacy of arterial switch operation for transposition of great arteries, serial echocardiographic studies were performed in 8 patients who underwent the surgery between 1989 and 1998 at Dept. of Thoracic & Cardiovascular Surgery, Yeungnam University Hospital in Daegu City, Korea. Material and Method: Follow-up period ranged from 6 months to 11 years(average of 4.1 years). Body weight ranged from 2.6kg to 4.8kg, with average of 3.6kg. 5 of 8 patients were preoperatively diagnosed as TGA+VSD, and 3 as TGA+IVS. LV function was evaluated by the measurement of LV shortening fraction, LVSTI, and LVEF. RVSTI was also measured. Postoperative function of valve and growth of great vessels were analyzed by the measurement of PSPGV, valvular regurgitation, LA/AO ratio, root dimension of aorta and pulmonary artery, comparing with the age matched controls, respectively. Result: LVEF had an average of 65.0+9.03% which is tended to increase serially. LVAOPG had an average of 15.9mmHg. RVPAPG, 27.5mmHg. From the measurement of aortic root dimension of 6 patients at end-systole, aortic root growth was assumed to increase more than the mean value of normal growth. PA root dimension at end-systole showed a similar growth progress when compared with age matched normal controls. Postoperative pulmonic valve regurgitation was noted in 5 of total 8 patients, in which 1 patient who showed grade 2 and 4 showed below grade 1. AR, in 6 patients and all grade 1 Except 1 patient, all the valvular regurgitations were below grade 1, which was presumed to be clinically insignificant.

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The Proposal of a Size-Spec. for Adult Women (성인 여성의 정면 체형별 사이즈 스팩의 제안)

  • 최유경;이순원
    • Journal of the Korean Society of Clothing and Textiles
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    • v.23 no.4
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    • pp.575-583
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    • 1999
  • Abstract The purpose of this study was to propose a new size-spec. which was applied to four frontal bodytype -X, Y, A and H type-of adult women. Control dimensions of the upper garments were stature bust girth and hip girth. And those of lower garments were waist girth and hip girth. To establish the interval of the control dimensions means and standard deviations were used. By distributing the data of 486 subjects a new size-spec. was proposed. According to the new size-spec. in case of upper garments about 45.7% of subjects were covered by 37 size-speces. and lower garments about 85.9% were covered by 36 The strong point of new size-spec. is to consider the formal feature of each bodytypes. So by trying to apply the new size-spec. to rady-made garments comfort and fitness of those are satisfied.

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Performance Uncertainty Estimation of a Nonlinear Vibration System Based on a Sampling Method (샘플 추출방법에 근거한 비선형 진동계의 성능 불확실성 예측)

  • Choi, Chan-Kyu;Yoo, Hong-Hee
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • 2009.10a
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    • pp.113-118
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    • 2009
  • A designer regards the vibration system as a linear system. However, in real world, nonlinearity of a vibration system should exist caused by various factors like manufacturing conditions or uncertain material properties. So, properties of a spring and a damper which are consisting the vibration system have statistical distribution. Therefore, a designer needs to analyze the statistical nonlinearity in a vibration system. In this paper, $1^{st}$ Taylor series expansion method and univariate dimension reduction method apply to a performance measure of nonlinear vibration system, and compare each result. And then, merits and demerits of each method are discussed. For apply more actual problem, a performance measure population is estimated based on design variable samples like properties of spring or damper.

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A Welding Inspection of Small-sized Metalized Film Capacitor with Large Capacity (소형.대용량 Metalized Film Capacitor의 용접 오차 검출 개발)

  • Jeong, Won-Young;Oh, Choon-Suk;Ryu, Young-Kee;Lim, Jong-Seul;Lee, Seo-Young
    • Proceedings of the KIEE Conference
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    • 2004.11c
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    • pp.135-137
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    • 2004
  • In this study we'll deal with the small-sized metalized film capacitors with large capacity which head have $5mm{\times}5mm{\times}2.5mm$ dimension. The lead wire is used to weld at both sides of capacitors. At that time the position gap between the welding machine and lead wire supplier would cause the welding error. Also, during the tapping processing of metalized film capacitors, the interval error among the capacitors, the length error of lead frame attached at the capacitors, and the straightness distortion of the lead frame could happen. As mentioned, four kinds of error parameters will be measured and analyzed by using the automatic visual inspection system that is implemented with CCD camera, optical parts, background lighting, and image processing algorithms. Finally we are able to achieve success rate above 99% to detect the welding faults of capacitors in the field test.

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The Relationship between School Bullying and Perceived Parenting Practices of Adolescents (학교 따돌림과 청소년이 지각한 부모의 양육행동과의 관계)

  • Kim, Dong-Hee;Kim, Young-Shin;Koh, Yun-Joo;Leventhal, Bennett L.
    • Journal of the Korean Society of School Health
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    • v.23 no.2
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    • pp.89-96
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    • 2010
  • Purpose: To examine whether three, specific maternal and paternal parenting are associated with school bullying. Methods: A longitudinal study was conducted among 1585 seventh and eighth-grade students in two middle schools participated in the study between 2000 and 2001. The instruments were the Korean Peer Nomination and Childrearing Behavior Questionnaire (measuring three dimension of parenting practice: Warmth/acceptance, rejection/restriction, and permissiveness-nonintervention). Descriptive and multiple logistic regression analyses were performed. Results: The ORs of perpetrator with maternal rejection/restriction parenting was 1.065 (confidence interval: 1.008~1.126). Conclusion: Adolescents who were experiencing maternal rejection/restriction was at significantly increased risk for being perpetrators. Development of preventive and intervention programs with the goal of improving parenting skills may help to reduce adolescent school bullying.

A Study of Sizing System for Children′s Wear for the Use of E-Business (인터넷 전자 상거래를 위한 아동복 Sizing system 개발에 관한 연구)

  • 조진숙;최경희
    • Journal of the Korean Society of Clothing and Textiles
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    • v.26 no.6
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    • pp.923-934
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    • 2002
  • The aim of this study is to suggest a Sizing System which has following points:- 1. In order to satisfy children of diverse figure shapes, we developed sizing system for three different figure type. Figure types are categorized into slim, normal, fat type based on the Rohrer Index. 2. For each figure types, we developed size chart using height bust circumference and hip circumference as basic measurements. The size codes are presented as the height-bust circumference or height-hip circumference. The size interval of height is 5cm for all figure types, such as 120,125,130 ‥‥ we developed a size allocation program, which is helpful when a customer doesn't know exact measurement of some body dimension. If a customer input measurements as much as he/she hows, the program allocates the nearest. At the end of the study, the sizing interaction sites were developed to present the results of the study clear.