• 한국융합학회논문지
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• 제8권12호
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• pp.391-395
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• 2017

본 연구에서는 안경 조제 가공료와 피팅비 필요성 및 정착화에 필요한 내용에 대한 설문조사를 실시하였다. 2016년 8월 1일부터 9월 30일까지 서울, 경기 지역의 안경사 202명을 대상으로 각 설문항목을 설정하고 온라인 오프라인으로 설문조사를 실시하였다. 모든 자료의 통계처리는 Origin Pro 8.5를 사용하여 실시하였다. 안경 조제 가공료와 피팅비 도입의 필요성에 대하여서는 각각 92.1%(186명), 93.1%(188명)가 도입 필요성에 대해서 긍정적으로 평가하고 있었다. 안경 조제 가공료와 피팅비에 대한 설문분석 및 해외사례를 통해 안정화된 정책을 제공함으로써 보건의료 서비스 전문가로서 안경사의 위치를 정립하여야 할 필요가 있다고 조사되었다.

• 대한전자공학회논문지SD
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• 제42권4호
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• pp.45-52
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• 2005

본 논문은 인쇄 회로 기판에 있는 through hole vias를 시간 영역과 주파수 영역 측정을 통하여 characterization을 하였다. Via characterization은 Time Domain Reflectometry (TDR)를 이용하여 시간 영역에서 측정하고 HSPICE fitting 시뮬레이션으로 via 모델 파라미터를 추출하였다. 또한 2 port Vector Network Analyzer (VNA)로 주파수 영역에서 측정하고 Advanced Design System (ADS) fitting 시뮬레이션 하였다. VNA를 이용한 측정에서는 같은 평면에서 probing하기 위해 ABCD matrix 를 이용하여 do-embedding 수식을 유도하였다. 그리고 single via characterization 결과를 바탕으로 differential signaling을 위한 differential via characterization을 TDR과 VNA 측정을 통하여 수행하였다. Differential via characterization은 TDR 모듈의 odd mode와 even mode 소스들을 이용하여 시간 영역에서 측정하고 HSPICE로 fitting 시뮬레이션으로 모델 파라미터를 추출하였다. 추출된 모든 data는 측정 및 simulation 결과를 비교한 결과 single via의 경우, 최대 $14\%$, differential via의 경우 최대 $17\%$의 오차를 나타내었다.

• 한국의상디자인학회지
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• 제18권1호
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• pp.191-203
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• 2016

The 3D virtual fitting system is a new and very efficient system replacing real fitting in apparel industry and on-line shopping. It is a win-win system for both of consumer and manufacturer which not only reduces design and production time but also resolves consumer's complaints by checking the wearing image beforehand. It is a must-have item in the future. The purpose of this study is to analyze sizing menu, terms, and current status and to figure out problems of avatar sizing programs which substitute human bodies in virtual fitting. We chose three existing outstanding programs in domestic and global market, compared and analyzed the program, manual, and terms that are used in avatar sizing, and investigated the strengths, weaknesses, problems of options and terms and finally suggested an alternative terms. The revealed problems are as follows: each program supports various avatars ranging from male to female, from child to adult, and from oriental style to western style. The image of the avatar could be changed through the options for hair style, shoes and accessories. But we found out some problems. The avatar body types are far from actual human body types, avatar sizing menus and item terms are different from program to program, and terms not yet standardized. Cooperative efforts of industry and academy on standardization of sizing menus and terms should be emphasized for the virtual fitting system to be widely used like the other computer graphic programs or word editors.

• 한국안광학회지
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• 제1권1호
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• pp.73-84
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• 1996

소아용 안경의 temple부분은 알맞는 탄력성이 있고 bridge부분은 충분한 견고성이 있어야 하여, 옥형 사이즈나 temple의 길이는 적어도 3-4종류가 있는 안경테로 하여야 한다. 또 pad는 높아와 폭 및 각도 조정이 가능한 것을 선택해야 하며, pad와 temple의 접촉에 대한 보정력이 충분한 것을 선택해야 한다. pad의 fitting은 비능부(鼻陵部)에 작용하는 안경중량의 크기가 압력에 비례하므로 pad의 전면(全面)이 비능부(鼻陵部)에 균일하게 접촉할 수 있도록 fitting해야 하며, pad는 접촉면이 넓은 것이 좋다. 렌즈의 선택시 주의할 점은 렌즈의 도수가 강해 질수록 안경 총중량에 차지하는 렌즈중량의 비율이 커지므로 무게는 될 수 있는대로 가벼운 것을 선택해야 하고, 최소직경 생지렌즈로 하는 것이 좋으며, 깨어지지않고, 안전성이 뛰어난 프라스틱 렌즈를 사용하는 것이 적합하다.

• 한국생활과학회지
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• 제17권1호
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• pp.115-126
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• 2008

The construction of an athlete's tight-fitting garments is very important to the wearer in terms of athletic performance. Therefore pattern development of tight-fitting garments must allow for the full range of human movement and postures. In this study the relationship between the construction of a skate pants pattern and clothing fitting was explored with the aim of improving the comfort of the clothing. The four male subjects were university students between the ages of 20 to 24. Subjective wear sensations of the experimental garments were rated using a seven-point Likert scale on four consecutive days. While wearing the garments, subjects were asked to take five different postures including waist flexion, sitting and others. A Likert-type scale was used for the evaluation, with 7 points indicating the best fit in tight-fitting pants. Results showed differences in the front-rise length and back-rise length between basic pants(A) and modified pants(B,C,D) were -5.16cm and +5.64cm. Comparing the basic pants pattern(A) with modified pants pattern(B), the latter was superior to basic pants(A) in terms of pressure sensation and closeness of fit, but there was no significant difference. Among the four tight-fitting skate pants, A and B pants were superior to the others in terms of fitting and stability of waist and hip sections. In the case of the skate pants, the number of cutting lines in the pattern had an influence on clothing comfort. A minimum cutting line for tight skate pants was better than a maximum cutting line in terms of clothing comfort.

• 한국의류산업학회지
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• 제20권4호
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• pp.410-421
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• 2018

The study is designed to develop a educational basic pants patterns for men, and has been analyzed focusing on the university textbooks published since 2000. We also used CAD programs and virtual fitting programs to analyze the fitness of pants. To do this purpose, after choosing 7 Men's Wear textbooks, selected patterns were drawn and measured using PAD system and were compared and analyzed. Also, the appearance evaluation was examined through virtual fitting and then evaluated 21 male and female university students in their 20s. After supplementing the problems of the patterns in the existing textbooks, a pattern was developed and verified the fitness of the developed pattern. The results of comparing the proposed measurement items of each textbook for the pants pattern indicated a significant differences in terms of hip circumference of each pattern, which were between 96~105cm. A comparison of the drafting methods of each pattern showed the drafting methods for the crotch length, the front crotch extension, the back crotch extension were the difference. The results of appearance evaluation were pattern E presented the slimmest fit and pattern D presented the loosest fit. As a result of analysis of pants pattern, a waist circumference 82cm, a hip circumference 98cm, a crotch length 24cm, a pants length 104cm and a ham line width 46cm were most suitable. The development pattern was evaluated as superior to the existing pattern through the appearance evaluation of the virtual fitting.

• Journal of Computational Design and Engineering
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• 제2권4호
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• pp.218-232
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• 2015

Piecewise linear (G01-based) tool paths generated by CAM systems lack $G_1$ and $G_2$ continuity. The discontinuity causes vibration and unnecessary hesitation during machining. To ensure efficient high-speed machining, a method to improve the continuity of the tool paths is required, such as B-spline fitting that approximates G01 paths with B-spline curves. Conventional B-spline fitting approaches cannot be directly used for tool path B-spline fitting, because they have shortages such as numerical instability, lack of chord error constraint, and lack of assurance of a usable result. Progressive and Iterative Approximation for Least Squares (LSPIA) is an efficient method for data fitting that solves the numerical instability problem. However, it does not consider chord errors and needs more work to ensure ironclad results for commercial applications. In this paper, we use LSPIA method incorporating Energy term (ELSPIA) to avoid the numerical instability, and lower chord errors by using stretching energy term. We implement several algorithm improvements, including (1) an improved technique for initial control point determination over Dominant Point Method, (2) an algorithm that updates foot point parameters as needed, (3) analysis of the degrees of freedom of control points to insert new control points only when needed, (4) chord error refinement using a similar ELSPIA method with the above enhancements. The proposed approach can generate a shape-preserving B-spline curve. Experiments with data analysis and machining tests are presented for verification of quality and efficiency. Comparisons with other known solutions are included to evaluate the worthiness of the proposed solution.

• 한국지반공학회논문집
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• 제20권8호
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• pp.49-58
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• 2004

콘프레셔미터는 피에조콘 시험과 프레셔미터 시험을 동시에 수행할 수 있는 현장시험기로서 본 연구에서는 국내 점토지반에서 수행한 시험결과를 해석적으로 분석하였다. 콘프레셔미터 결과에 대한 이론적인 해는 흙이 비선형 거동을 하는 경우와 전단변형 중 체적변화가 발생하지 않는 경우에 대하여 해석적인 해가 존재한다. 이러한 해석적인 해로부터 콘프레셔미터의 결과중 하중 재하구간과 제하구간에 대해 Curve Fitting 방법을 사용한 콘프레셔미터 결과의 해석 방법을 제안하였다. 20개소의 현장에서 수행한 콘프레셔미터 결과 중 지반교란의 영향을 적게 받는 제하구간에 대하여 Curve Fitting 방법을 적용하여 점성토의 비배수 전단특성을 구하였다. 이렇게 구한 지반의 비배수 전단강도와 현장 Vane, 일축압축, 삼축압축 시험결과로부터 구한 지반의 비배수 전단강도를 서로 비교하여 콘프레셔미터 시험 결과로부터 Curve Fitting 방법을 통한 점성토 지반의 전단강도 특성파악의 적정성에 대해 평가하였다.

• 한국생활과학회지
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• 제15권3호
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• pp.481-490
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• 2006

Adjusting pressure level in the construction of athletes' tight-fitting garments by reducing the elastic knit pattern is a challenging subject, which influences the performance of the wearer directly. Therefore, in this study, relationship between the reduction rates of the basic pattern obtained from 3D human scan data and resultant clothing pressure was explored to improve the fit and pressure exerted by clothing. 3D scan data were obtained using Cyberware and they were transformed into a flat pattern using software based on Runge-Kutta method. Reduction rate was examined by subjective wear test as well as objective pressure measurement. As a result, difference in the length between the original 3D body scan data and the 2D tight-fitting pattern was 0.02$\sim$0.50cm (0.05$\sim$1.06%), which was within the range of tolerable limits in making clothes. Among the five garments, the 3T-pattern was superior in terms of subjective sensation and fit. The pressure of the 3T pattern was 2$\sim$4 gf/cm2 at five locations on the body, which is almost the same or a bit higher than that of Z-pattern. In the case of tight-fitting overall garment, the reduction rate of the pattern in the wale direction is more critical to the subjective sensation than the course direction. It is recommended that the reduction grading rules of course direction should be larger than that of Ziegert for a better fit of tight-fitting garments. In the case of wale direction, however, reduction grading rule should be kept the same as suggested earlier by Ziegert (1988).

• 한국멀티미디어학회논문지
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• 제15권7호
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• pp.941-950
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• 2012

본 연구에서는 PC상에서 인체 3차원 데이터에 상하의 의류를 중첩 착의하는 가상 착의 시스템을 소개한다. 이를 위하여, 레이저 스캔 방식으로 얻은 인체 3차원 데이터와 의류 앞뒷면의 모습을 촬영하여 얻은 의류 디지털 데이터를 이용한다. 2차원의 앞뒷면 의류 디지털 데이터에는 의류 소재 내 질점 간의 장력이 반영되었고, 인체 데이터에의 착의 과정에는 마찰력과 중력을 적용해 주었다. 하의 착용 시에는 마찰력과 중력에 추가적으로 혁대 개념을 도입하여 흘러내리는 의류를 고정하였고, 하의를 착의한 인체데이터위에 상의를 착의하는 중첩 착의 방법을 제시하였다. 본 시스템이 지닌 장점은 복잡한 패턴을 이용하여 착의하는 다른 연구와 달리, 의류의 앞뒷면만을 이용하여 착의하면서도 현실감은 뒤지지 않는다는 것에 있다. 현재 의류전자상거래 시 의류의 앞뒷면만을 전시하여 판매하는 방법과 유사한 방식으로 온라인 판매가 이루어지나, 착의 모습을 제공할 수 없는 기존 방식과 달리 3차원의 착의 모습까지 제공하게 되어, 의류 판매의 방식을 바꾸게 할 것으로 기대한다.