• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.601-604
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• 2003

신발 설계 시스템에서 그레이딩 기능은 기본 사이즈로 설계된 신발 라스트를 생산하고자 하는 여러 사이즈로 변환하는 작업이다. 그레이딩(Grading) 작업은 전체적으로 적용되는 제로 그레이딩(Zero Grading)과 특정한 부분에 개별적인 룰을 적용하는 센터 그레이딩(Center Grading)으로 구분된다. 이 두 방식을 혼용하여 그레이딩 작업을 수행하는데, 이 때, 휘어짐이나 일그러짐과 같은 부적절한 결과가 발생할 수 있고, 이런 오류를 보정하기 위해 제약조건들(Restrictions)을 적용한다. 이와 같이 센터 그레이딩과 제약조건들을 적용한 그레이딩을 특수 그레이딩이라 한다. 기존의 신발 설계 시스템에서는 이런 특수 그레이딩에 대해 속도가 느리거나, 기능이 미비하거나 지원하지 않는 문제점이 있다 본 논문에서는 이런 문제점들을 해결하고, 특수 그레이딩을 위한 제약조건을 다중으로 적용할 수 있도록 보완하였다.

• The Journal of Natural Sciences
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• v.10 no.1
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• pp.141-151
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• 1998

The purpose of this study was to suggest the skirt grading rule for different somatotypes. For this study 9 subjects were classified three types according to the shape of front hips such as diamond, standard, heart. Skirts pattern were made by Moonwha grading method for traditional grading rule. For each somatotypes, skirt pattern were graded by new grading rule. The sensory evaluations were practiced for appearance and function. At the result, comparing between the new grading rule and traditional grading rule, new grading rule was fitter than the traditional grading rule. And diamond type was distinctively better than the other somatotype at sensory evaluation appearance. For pattern making of diamond type it had better use the new grading rule that was considered the characteristics of body shape.

• The Journal of the Convergence on Culture Technology
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• v.6 no.3
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• pp.205-210
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• 2020

The purpose of this study is to propose grading increments chart for women's bodice sloper in their 20s in order to increase consumer satisfaction with apparel products. The selected bodice sloper is a compromise between the German Müller bodice sloper and the Japanese Munhwa bodice sloper. Based on National Standards Position Survey data, the main dimension average for women in their 20s was set. The grading increments was set at the grading deviation application area in bodyboard and sleeve. Thereafter grading was done and the suitability of the graded pattern was checked.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.6
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• pp.665-674
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• 2003

The purpose of this study was to develop a grading increment at armhole area by apparel CAD(Computer Aided Design) system. In developing a grading increment at armhole area, we analyzed ease values of armhole area in bodice and sleeve by manual drafting patterns of five sizes. We suggested grading increments applied Pythagorean theorem to development the grading increment of the armhole of sleeve. The results and discussions of this study were as follows: 1. In drafting each size, the ease values were not identical. It was difficult to draft perfectly the same armhole line shape between sizes. 2. According to our developed grading increments applied Pythagorean theorem, the ease values were identical between sizes and difference of the armhole length between sizes was also identical. 3. The grading formulas were made out for apparel CAD system. Once grading increment or formula is set in the computer, it can be easily altered to various clothing items at any time. The efficiency of grading work will be also improved and grading time will be reduced.

• KOREAN POULTRY JOURNAL
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• v.24 no.5 s.271
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• pp.91-97
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• 1992

• Journal of the Korean Applied Science and Technology
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• v.35 no.3
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• pp.731-743
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• 2018

In bio-jet fuel production, selecting operating conditions of hydro-upgrading is of great importance to make iso-Paraffin rich hydrocarbons with carbon distribution including jet fuel range. Herein, iso-Paraffin rich biofuel including jet fuel range hydrocarbons ($C_8-C_{16}$) is produced from simultaneous cracking and isomerization using n-Paraffin rich hydrocarbon derived from hydrotreated vegetable oil over 0.5 wt..% Pt/Zeolite catalyst. We report and analyze the yields and compositions in the produced hydrocarbons affected by various operating conditions, such as reaction temperature, reaction pressure, molar ratio of reactants, and weight hourly space velocity. Aforementioned operating conditions not only can help interpret the reaction dynamics of hydro-upgrading, but also further produce bio jet-fuel after distillation.

• Applied Chemistry for Engineering
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• v.24 no.1
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• pp.10-17
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• 2013

Heavy oil residue upgrading process was being used in conventional refinery process. Recently, as the importance of non conventional energy development is growing up, the commercial projects of heavy oil upgrading are getting more active than before. For having competitive business model in the resource competition, non conventional energy development should be considered as an important business strategy. In developing oil sands, extra heavy oil, and shale gas, canadian oil sands and extra heavy oil have great importance in substitution of conventional oil consumption. In oil sands development, the bitumen, which is extracted from oil sands, has great value after upgrading or refining process. Similar process is being used current conventional refinery process. The bitumen is highly viscous hydrocarbon. This bitumen includes impurities which can not be treated in conventional refinery process. As this reason, specified process is needed in bitumen or extra heavy oil upgrading process. Moreover, there will be additional specified facilities in the process of production, transportation and marketing. In oil sands, there are various kinds of commercial upgrading process. Extraction, dilution, coking and cracking method were being used commercially.

• Proceedings of the ESK Conference
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• 2004.10a
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• pp.27-27
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• 2004

• Journal of the Korean Society of Clothing and Textiles
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• v.24 no.6
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• pp.799-809
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• 2000

This study was designed for automated pattern drawing and grading a man's Durumagi, Korean traditional coat in order to reestablished and grade the pattern by Apparel CAD SYSTEM. For the study, AM-250 systems of Gerber as the computer and Macro program as the automated drawing were used. Also, PDS(Pattern Design System) was used for the grading of the original Durumagi pattern. Results were followings; First, the size data that could be standardized by reestablishing the pattern of a man's Durumagi by each size was presented. Second, The pattern was developed by each size. Third, new design was propose for mass production with the traditional design of the DURUMAGI Fourth, The time for making DURUMAGI pattern and the cost through the automated drawings by using the Macro program were reduced. Moreover, was presented the basic data for a ready to made garment like the Western garment. Five, A man's DURUMAGI by CAD System was graded that could be applied to ready to made Hanbok

• Journal of the Korea Fashion and Costume Design Association
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• v.4 no.3
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• pp.55-64
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• 2002

The purpose of this study is to review the grading practices and size systems of women's apparel industry in Korea and thereby, analyze the grading problems to find their solutions. Compared with other pattern producing processes, the working principles and methods of grading seem to be consistent, repeatable and stable. Therefore, if the grading deviation setting and working method should be standardized and systematized, it is much easier to automate the grading work than other pattern works. Nevertheless, it was found through this study that grading deviation setting or its application depending on body forms or age groups is not systematic. Moreover, since size identifications, basic sizes or intervals differ among apparel businesses, consumers may be confused in selection of the apparels fitting their body forms. Thus, it is deemed necessary to precisely analyze consumers' body sizes and determine on grading gains or losses in consideration of the body forms.