• Journal of the Korean Society of Clothing and Textiles
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• v.33 no.12
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• pp.1979-1990
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• 2009

This study suggests apparel sizing systems for obese women in their twenties to fifties. Size Korea body measurement data were used for sampling the obese subjects by obesity judgment indices. A total of 7 obesity judgment indices frequently used in the clothing field were inspected and the measurement data of 499 females defined as "obese" by over 5 obesity judgment indices were analyzed. The results of the study were as follows: A total of 2,212 female body measurement data for the Size Korea Project were collected. These were compared with the 499 data of the obese women in the study. Except for all heights and some lengths correlating with heights, the measurements of obese women were larger than the entire group of females. Bust girth, hip girth, and height were selected as control dimensions of the outerwear covering the upper body; waist girth and hip girth were selected as control dimensions of the outerwear covering the lower body. In each crosstabulation table, 3cm pitches and 5cm pitches by bust girth, waist girth, and hip girth were compared in the aspects of coverage and coverage efficiency. Finally, sizing charts for outerwear covering the upper body and the lower body of obese women were established in the study through the comparison of the coverage and the coverage efficiency. These Size charts were given by 5cm pitches as final sizing systems. Size number of outerwear covering the upper body was 10 and size number of outerwear covering the lower body was 9. In addition, the body measurements of control dimensions and referable dimensions for making garments are given.

• Journal of the Korean Society for Nondestructive Testing
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• v.25 no.4
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• pp.254-261
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• 2005

Dental statistics for Koreans are far from complete and the majority of previous researches have adopted techniques such as radiological analysis and sectioning of teeth for morphological information, which are time-consuming, less accurate and destructive. Thus, a new nondestructive method is necessary to get precise dental standardization data for Koreans. For the above purpose, each of the first premolars was scanned by a micro-CT (SkyScan, Belgium) with a resolution of $21.31{\mu}m$ at an interval of 0.022mm along the plane horizontally parallel to an occlusion plane. Internal and external morphological sections were measured and compared to the values in the average tooth size table for permanent teeth presented by G. V Black.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.06a
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• pp.1471-1474
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• 2003

The correlation between the object function and the design parameter is shown on this paper by using the characteristic function for tile mixed result of the structure analysis. tile buckling analysis and the table of orthogonal array according to the original crane's dimensional change. About the above two object functions, the effective of design change according to the change of design parameters could be estimated. Also, the crane's weight is reduced up to 20.58 percent maintaining the structural stability according to the thickness of plate.

• Journal of the Korean Society of Clothing and Textiles
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• v.31 no.6 s.165
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• pp.892-901
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• 2007

This research is the initial step for establishing a convertible body sizing table applicable to the Korean and American female apparel industry. All 3D female measurement data of the two countries were obtained from Size Korea Project and SizeUSA Project. The sample subjects used in this study were 1,988 Korean and 6,306 American females. Thirty-four(34) variables were chosen as the principal measurements in making garments. The conclusion of this research was as follow: First, it was determined that American women were larger and longer than Korean women in all measurement except shoulder slope measurement. Second, according to the differences analysis of the each age group in Korean Females, all measurements except hip girth had significant differences among the age groups. In case of American females, all measurements except arm length(shoulder to wrist) had significant differences among the age groups. Third, in the comparison of differences between the age groups of the two countries' women, some dimensions varied significantly with age, while others did not show any statistical significance among the age groups. Fourth, according to the t-tests of same age groups between Korean & American female measurements, American female measurements were larger and longer than Korean in all measurements except crotch length total, shoulder slope, hip girth-bust girth and hip girth-waist girth.

• Journal of the Korean Society for Precision Engineering
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• v.21 no.2
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• pp.160-167
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• 2004

The correlation between the object function and the design parameter is shown on this paper by using the characteristic function for the mixed result of the structural analysis, the buckling analysis and the table of orthogonal array according to the original overhead crane's dimensional change. About the above two functions, the effectiveness of design change according to the change of design parameters could be estimated. Also, the overhead crane's weight is reduced up to 10.55 percent maintaining the structural stability according to the thickness of plate.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.27 no.9
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• pp.1437-1443
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• 2003

Most optimization problems do not consider tolerance of design variables and design parameters. Ignorance of these tolerances may not fit for the practical problems and can lead to an unexpected conclusion. That is why we suggest robust optimization considering tolerances in both design variables and problem parameters. Using robust optimization, we designed minimum weight annular finned heat transfer tube subject to constraints on limitation of pressure difference and minimum value of total heat transfer. Consequently, robust optimization satisfies tolerance considered practical problems.

• The korean journal of orthodontics
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• v.36 no.2 s.115
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• pp.153-160
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• 2006

For orthodontic treatment of growing patients and those which involve long treatment times, knowledge of growth and development are essential. Data from the general growth observation chart being used at present does not reflect the growth transition of modern times. This is because these data are out of date. The present study, therefore, aims to introduce the process of producing a growth curve and growth rate curve based on data which represents a more accurate description of the present situation. The data used were from the 5th nationwide surrey, SIZE KOREA 2004 study, carried out by the Technology and Standards Policy Division, Department of Technology and Standards Planning, Ministry of Commerce. Processing and rearranging produced data with variations divided into the three quartiles and the 1st, 5th, 95th and 99th percentiles were included to produce a growth observation chart according to sex, height and weight differences. In the same way, a growth rate curve based on the geometric mean value was produced. The resulting growth charts can be used as an index for growth and development, and used for better communication between the orthodontist, patients and parents.

• Journal of the Korean housing association
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• v.11 no.2
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• pp.149-163
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• 2000

노인소비자들은 나이와 함께 기능적인 능력이 감퇴하면서 주택내의 환경이 그들의 한계와 장애를 보완해 줄 수 있게 좀 더 지원적이기를 기대한다. 이러한 노인그룹을 포함하여 모든 사용자에게 독립적이고, 안전하며, 편리한 생활환경을 조성해 주는 것이 유니버셜 디자인이다. 이 연구의 목적은 유니버셜 디자인 개념으로 개발 된 혁신적인 욕실용품들, 즉 높이가 조절되어 앉거나 서서 사용하는 장점 등을 갖춘 세면대와 높이조절이 되는 이동식 샤워기가 장착된 걸어서 들어가며, 접이식 의자가 있는 등의 장점을 가진 욕조에 대한 소비자 의견의 검토이다. 피험자는 미국에 사는 미국노인과 한국노인(50세이상-79세까지)으로 합계 58명이었다. 실험장소는 미국서부소도시 대학의 유니버셜 디자인 연구실로, 이 대학의 협력으로 이곳에 장착된 신개발 설비를 이용하였다. 실험시기는 1997년 5월부터 11월 사이(봄, 가을)로 소비자 의견조사는 3단계로 이루어졌다. 먼저 1단계 설문조사에서는 피험자 거주주택의 욕실환경, 피험자의 목욕방법, 건강과 안전, 새로운 욕실설비에 대한 소비자 의견 등이 조사되었다. 2단계는 실제로 선정 된 욕실설비의 사용실험으로 피험자가 옷입은 상태에서 목욕을 가정하여 선택된 설비의 사용동작을 하면서(비디오 촬영) 조사자의 조사표에 의한 질문에 답하였다. 3단게는 2단계의 사용실험 후 유니버셜 디자인 된 욕실설비의 가정 내 도입의사 등의 조사를 하였다. 위에서 설명한 3단계의 소비자 의견조사 및 실험에서 얻은 결과는 다음과 같았다. 1) 미국거주 미국노인과 한국노인의 비교에서 한국노인의 평균 신장이 3cm정도 작았고, 2개이상의 욕실을 가진 비율과 학벌, 독신거주비율은 미국노인이 다소 높았고, 욕조 소유율은 한국노인이 높았다. 2) 새로운 욕실 설비에 대한 소비자 의견은 미국과 한국노인 모두 유니버셜 디자인된 새 설비의 장점을 인정하였다. 욕조와 세면조가 매력적이라 평하였고 샤워조작기가 색상구분으로 도운물과 찬물인지가 편하며, 접이식 의자가 유용하며, 문 달린 욕조의 안전 손잡이와 욕조가장자리를 잡고 안전하게 출입한다고 했다. 그러나 욕조길이와 높이에서 두 나라간에 차가 있어 앞으로 치수에 대한 것이 연구과제로 지적되었다. 3) 욕실 설비 개발 시 유니버셜 디자인 용품에 요구되는 목표는 안전하게 쓸 수 있고, 가령에 따른 신체장애요소가 커버되어 스스로 사용가능하고, 사용상 번거로움이 없어 정신적 스트레스를 주지않는 것이어야 하겠다. 4) 선택된 유니버셜 디자인 욕실설비는 표준치수의 현 욕조위치에 장착이 가능하여 앞으로 현 주택에의 교체가 가능하였다. 5) 선택된 유니버셜 디자인 욕실설비는 인체치수와 문화가 다른 두 나라 노인 모두 긍정적으로 평가하여 앞으로의 국제적 보급이 기대되었다.

• Journal of Korean Society of Forest Science
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• v.109 no.3
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• pp.300-312
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• 2020

The growing stocks of young forests that are less than10 years of age have been excluded from the Korean forest resource statistics, despite the existence of standing trees; however, sustainable forest management and carbon removals in the forestry section require complete information regarding forest resources. This study developed a method to estimate the growing stocks for young forests from National Forest Inventory (NFI) data. After reviewing previous research on growth characteristics for young forests, we conducted stem analysis of major species, and examined stand characteristics by site index, based on real yield tables. Our statistical analysis results showed that there were few standing trees with diameters at breast height (DBH) above 6 cm in young stands, and that it would have taken 12 years, on average, to reach 6 cm DBH. This suggests that mean tree height by diameter should be assessed at the root, in order to assess growing stocks for young stands through the NFI. Moreover, the database system should be improved to differentiate tree species, since diverse shrubs, including trees, have been surveyed.

• Korean Journal of Agricultural Science
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• v.8 no.1
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• pp.82-89
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• 1981

The characteristic of rainfall intensity in short duration is very important to calculate short-term runoff in small watershed by Rational method. Therefore, the purpose of this study is to derive the most proper formula on the probable rainfall intensity in each return period in Daejeon area. And the results of this study could be utilized for the design of drainage-structures in small watershed, drainage system in urban area and flood control in small river basin. The result s of this study are summerized as follows. 1. Gumbel-Chow method which shows the mean value was chosen to calculate the probable rainfall in tensity in each return periods. 2. According to statistical judgement, probable rainfall intensity formula of Japanese type($I={\frac{a}{t+b}}$, see Table-6) shows the most proper one among other types of formula like Talbot type, Sherman type and Characteristic coefficient method. Probable rainfall in tensity value of Japanese type in Daejeon area shows well coincidence with the one obtained by applying prof. Park's n-coefficient to Monobe formula $I=({\frac{R_{24}}{24}})({\frac{T}{t}})^{0.5486}$. On the other hand, the value by Monobe formula with n-coefficient of 2/3 which is being used as a disign criterison by M. O. C. shows large difference from the fore-mentioned results (see Table-7). Consequently the value by Monobe formula might be judged that it is too much overestimated one as a design criterion. 3. Short-term runoff in small water shed could be calculated more reasonably in Daejeon area through this probable rainfall in tensity formula.