• Journal of the Korean Applied Science and Technology
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• v.35 no.3
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• pp.865-875
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• 2018

Selection of optimum reaction conditions during deoxygenation process of palm oil is essential factor to obtain the maximum yield of bio-jet fuel. In this context, the deoxygenation of palm oil was carried out in a fixed bed reactor with an internal diameter of 1 inch loaded with a 1 wt.% $Pt/Al_2O_3$ catalyst. The composition of the organic liquid product(OLP), which can be utilized as a transportation fuel through the upgrading process, was analyzed by a gas chromatography method. The palm oil/hydrogen ratio and hydrogen pressure in the feed affected the decarboxylation(DCB) and hydrodeoxygenation(HDO) reactions, resulting in a change in the composition of the OLP. As the reaction temperature increased, the continuous cracking reaction of the deoxygenation product was promoted and the product composition in the $C_5{\sim}C_{14}$ region was increased. Thus, the results can help to understand the characteristics of deoxidation reaction of palm oil as well as the subsequent process, hydro-upgrading, to obtain the maximum yield of bio-jet fuel.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.3
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• pp.43-51
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• 2020

In this paper, the design of 64 array antennas applied to RWP (Radar Wind Profiler) was described. The design point of the antenna is to ensure isolation between each element and to match the vertical / horizontal radiation pattern. To this end, a single element of the array antenna was proposed as a Bend dipole type, and through simulation, When sequentially sending 5 beams including vertical, the east/west/south/north direction was ±20°, and it was confirmed that no Grating Lobe occurred when steering the beam. The 64 array antenna proposed in this paper was designed with performance equal to or higher than that of overseas products, and was confirmed to be applicable to RWP.

• Fashion & Textile Research Journal
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• v.6 no.4
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• pp.475-484
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• 2004

The purpose of this study was to suggest the standard sizing system and grading rules according to body types of elderly women. The data were the anthropometric measurements of 329 women aged 60 and older measured in 2001. To determine the effective and useful clothing sizing system, the distribution of hip girth and bust girth of 3 body types which were suggested in KS K 0055 was analyzed, and the significant difference among adjoining hip girth ranges was analyzed, too. And the sizes of major body parts that were used for manufacturing clothing were made to have regular interval between each clothing sizes. From this study, we certified that each different sizing system for 3 body types to manufacture more suitable clothing for elderly women was necessary and suggested the standard size for each body type. And we also suggested the patternmaking sizes that were needed to manufacture ready-made clothing. On the basis of standard size, we suggested the grading rules for 3 body types. And we verified the propriety of the grading rules for 3 body types through the fitting test, and we knew that the grading rules for 3 body types of this study was very useful to manufacture clothing for elderly women.

• Fashion & Textile Research Journal
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• v.12 no.2
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• pp.194-202
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• 2010

There may be some problems in size fitness for ready-made-clothes purchasers with Obese body shape. The purpose of this study was to improve the wearing comfort of Junior-High School Girls' slacks by setting grading points and developing grading rules proper to the obesity. The subjects in this study was over 23 kg/m2 of the BMI. The subjects were 124 Junior-High School Girls of 12 to 14 year-old. The results of this study are as follows: (1) The size intervals of waist girth and hip girth were 3 cm and 4 cm respectively. The sizing system, which had frequencies more than 5%, was classified 8 cases. The majority segment is 76-97 size accounting for the 11.29% of subjects. (2) The measurements on 8 size from two groups after drawing slacks pattern on them revealed that the changed values of slacks front and back on the grading point marked are differ, indicating that it is needed to apply body shape. (3) The evaluation on the appearance for wearing slacks showed relatively high score, indicating that the grading between sizes within each group was effective. The studies on the body size distribution on each obesity pattern and on the setting size system reflecting characteristics of each body shape should be performed continuously.

• Fashion & Textile Research Journal
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• v.11 no.5
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• pp.771-778
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• 2009

There may be some problems in size fitness for ready-made-clothes purchasers with fatty body shape especially for them with abdominal obesity. The purpose of this study was to improve the wearing comfort of Middle-aged women slacks by setting grading points and developing grading rules proper to the abdominal obesity. The subjects in this study was over $25kg/m^2$ of the BMI, over 85cm of waist, and over 0.8 of WHR. A total of 176 Middle-aged women satisfyingthem were enrolled. The results of this study are as follows: (1) The majority segment is 85-94 size accounting for the 11.36% of subjects. (2) The measurements on 11 size from three groups after drawing slacks pattern on them revealed that the changed values of slacks front and back on the grading point marked are differ, indicating that it is needed to apply body shape and age specific grading rule. (3) The evaluation on the appearance for wearing slacks showed relatively high score, indicating that the grading between sizes within each group was effective. The studies on the body size distribution on each obesity pattern and on the setting size system reflecting characteristics of each body shape should be performed continuously.

• Fashion & Textile Research Journal
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• v.6 no.5
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• pp.634-640
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• 2004

Nowadays, the use of apparel CAD system is important to the mass production of ready to wear. Especially, computer-based grading is the most important process to improve the fitness of clothes and to reduce the time needed to make various size pattern. The purpose of this study was to suggest a standard sizing system for high school boys' pants and to suggest a grading method according to the sizing systems. The subjects were 217 high school boys of 16 to 18 year-old. The size intervals of waist girth and hip girth were 3 cm and 4 cm respectively. The sizing system, which had frequencies more than 4%, was classified 8 cases. Among them, 71-92 and 71-88 size were the most frequent size and were adopted the basic size for the two types of grading. According to the sizing system, hand-made patterns were manufactured. By measure of the each part of the slacks, 4 size's new grading-rule patterns were developed by each size. This result will contribute to clothing fitness of consumer and the amount of production.

• Journal of the Korean Society of Clothing and Textiles
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• v.17 no.4
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• pp.638-647
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• 1993

현재 미국에서 컴퓨터 디자인(Computer aided design)은 의류산업과 의류학 교육에 중요한 역할을 하고 있다. 그러나 한국내 의류학관련 학과에서의 CAD의 도입은 아직 초기 단계에 불과하다. 이에 본 연구는 미국내 대학을 중심으로 의류학관련 학과에서의 전반적인 CAD 교육 경향을 조사 분석하여 실질적인 자료와 국내 의류학관련 학과의 CAD 교육의 나아갈 방향을 제시하는데 그 목적이 있다. 1993년 5월, 총 19문항의 질문지가 124개 대학 의류학관련 학과에 우편으로 배포되었으며 71부가 회수되어 57%의 회수율을 나타내었다. 그 결과는 다음과 같다. 조사 대상(71개 학교)중 56%가 CAD를 커리큘럼에 포함시켰다. 특히 의상디자인 전공을 가진 학과의 79%가 CAD를 도입하여, 의상디자인 전공이 없는 학과(28%가 CAD를 도입)보다 그 비율이 훨씬 높았다. 의류학 교육에서 CAD의 도입은 1988년 이후 급격한 증가 추세를 보였으며, 대부분의 강의는 의류학분야 교수진에 의해, 의류학과 시설물내에서 이루어졌다. CAD를 독립된 과목으로 강의하는 경우 대부분 필수과목으로서 한 학기 코오스가 많았으며 3학년부터 시작되었다. CAD를 다른 의류학 과목에 포함시켜 일부분으로 강의할 경우 영역 별로는 복식 의장학 분야의 과목에, 시간 별로는 한 학기 중 "몇 주" 정도로 가르치는 경우가 가장 많았다. 전체 CAD 강의에서 다루는 주제로는 패턴 메이킹이 가장 많이 차지하였으며 그 다음에는 패턴 그레이딩, 마커 메이킹, 직물/패턴 디자인, 패션 일러스트레이션, 의상디자인 순이며 스토어 레이아웃 상품전시 및 디스플레이 계획이 가장 적었다. 본 연구 결과는 현재 CAD를 강의하고 있거나 앞으로 CAD를 커리큘럼에 도입하려는 한국 의류학 분야 교육자에게 유용한 정보를 제공할 수 있을 것으로 기대된다.

• Korean Journal of Human Ecology
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• v.7 no.2
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• pp.63-73
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• 1998

To get well-fitted ready-made clothings with beautiful silhouettes, it's better to classify body forms into several forms and to assign sizing within each form than to grade just based on body size regardless of body styles. This study illucidated the importance of drop value in the results of surveying the current values of sizing and grading. Therefore, it's meaningful to get the classification of body form with appropriate distribution of drop values of the body, and the distribution of drop value and the frequency of each form is very helpful to name the combined sizing or coverage of ready-made clothes. This study aimed at classifying body forms with various drop values using multivariate analysis for sizing and grading. Factor analysis and cluster analysis were done using measured values from 346 unmarried women. The results are as follows: 1. The factor which explains body forms was obtained by factor analysis, and the representative major 18 items which have important roles in classifying body forms were selected among the measured values with high factor loading and communality. 2. The body forms were classified into 8 groups based on the charateristics, frequencies and distributions of them obtained from cluster analysis. 3. Each classified body form showed conspicuous difference in drop value and the difference of body form mainly resulted from the difference between waist and hip rather than the difference between bust circumference and waist in Korean unmarried women.

• Journal of the Korean Home Economics Association
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• v.38 no.10
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• pp.45-51
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• 2000

This study illucidated the importance of drop Value in the resets of surveying the current values of sizing and grading. Therefore, it is meaningful to get the classification of body form with the appropriate distribution of drop values of the body. The distribution of drop value and the frequency of each form is very helpful to name the combined sizing or coverage of ready-made clothes. This study aimed at classifying body forms with various drop values using multivariate analysis for sizing and grading. Factor analysis and cluster analysis were done using measured values from unmarried women. The resets are as follows; The factor which explains body forms was obtained by factor analysis, and the representative major 18 items which have important roles in classifying body forms were selected among the measured values with high factor loading and communality. 1) The body forms were classified into 3 groups based on the characteristics, frequencies and distributions of them obtained from cluster analysis. 2) Each classified body form showed conspicuous difference in drop value and the difference of body form mainly resulted from the difference between bust and hip(drop value) in Korean unmarried women. 3) Discriminant analysis showed that the most significant discriminant factor of the trunk classification were bust circumference, upper bust circumference, hip circumference and stature. 4) The cover ratio of size studied in this study for the Korean Sizing system for women's garment were founded high.

• The Korean Journal of Community Living Science
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• v.20 no.4
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• pp.571-578
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• 2009

This study was to apply the measurement variations of each region of the body to the basic bodice pattern grading and to provide the clothing pattern fit for the human body. Grading variation used in the apparel industry was researched and new grading variation was proposed by analyzing the statistical data of body measurements. The statistical variation in body measurements was applied to set the optimum grading region and variation. Five sizes were used by split grading method and drawn with Bust Circumference and waist length based on the middle size. Differences between the grading pattern and the drawing pattern were analyzed by overlapping them and measuring each region. The measurement variations of drawing patterns between the sizes were very different from those of statistical data. On the other hand, the measurement variations of grading patterns between the sizes and those of statistical data were similar. In summary, the grading pattern by applying the measurement variations to the region of the body was superior to the drawing pattern drawn by the basic measurements for clothing fitness.