• 대한가정학회지
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• 제37권12호
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• pp.59-67
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• 1999

This study analyzed firefighter's actual wearing condition of turnout gear The results are as fellows: 1. When a firefighter is employed, Korea applies only the minimum of firefighters stature and weight but America applies both the minimum and the maximum. The choice of size is highly related with stature more than chest circumference. 2. The satisfaction degree of thermal barrier is very low, 3%. They used rubber gloves rather than heatproof gloves. This is more serious in small country like 'up', 'myun' than in cities. For laundering, they used sprinkling method with firefighting hose. Firefigthers hoped that their clothes could be classified tv the seasons and fire places. 3. frefighter had high unsatisfaction with the movement of hands and leges in the aspect of movement adjustability, air permeability, weight, body temperature regulation, and breathing in the hygenic aspect, fire resistance, thermal resistance property, water proof, chemical reactivity and electrical conductivity. Thev were also unsatisfied with water proof boots and gloves. They were generally satisfied with helmets but firefighters over 90kg of weight were rather unsatisfied. 4. The satisfaction degree for physical fitness was very low and the items with which they were not satisfied depend on physical features. 5. To develop turnout gear, they wanted changes in design, material and size. Reflection tape need to be replaced with high quality products and they wanted the use of velcro and zipper in fastening system.

• 한국의류산업학회지
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• 제11권2호
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• pp.301-307
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• 2009

The purpose of this study is to investigate the problem and complaint of current flight suit derived with the questionnaires. The survey was carried out to the 137 aviators in Army Aviation School from April to May, 2007. The questionnaires were composed of personal characteristics, usage characteristics, wearing characteristics and free comments. Regard to the questionnaires of usage characteristics, they wore the flight suit over 6 hours a day and over 5 days a week. For wearing convenience item in usage characteristics it was revealed that fitness, ease and the location of pocket were not proper, Also, it showed that the material characteristics(e.g. insulation, absorption, and sensation) for flight suit was not proper. Regard to the questionnaire of wearing characteristics, the most inconvenient part is crotch as the answer on the question of "unfitting part in size" and "inconvenient part when wearing". Free comments for the improvement requests are various size, material, stitch strengthening, pattern modifying, and accessories.

• 한국공간구조학회논문집
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• 제1권1호
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• pp.125-134
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• 2001

The objective of this study is the development of size discrete optimum design algorithm which is based on the GAs(genetic algorithms). The algorithm can perform size discrete optimum designs of space trusses. The developed algorithm was implemented in a computer program. For the optimum design, the objective function is the weight of space trusses and the constraints are limite state design codes(1998) and displacements. The basic search method for the optimum design is the GAs. The algorithm is known to be very efficient for the discrete optimization. This study solves the problem by introducing the GAs. The GAs consists of genetic process and evolutionary process. The genetic process selects the next design points based on the survivability of the current design points. The evolutionary process evaluates the survivability of the design points selected from the genetic process. In the genetic process of the simple GAs, there are three basic operators: reproduction, cross-over, and mutation operators. The efficiency and validity of the developed discrete optimum design algorithm was verified by applying GAs to optimum design examples.

• 한국전자파학회논문지
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• 제15권2호
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• pp.194-198
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• 2004

본 논문에서는 유전자 알고리즘을 이용하여 접지면에 4개의 U 슬롯을 가지는 광대역 소형 마이크로스트립 안테나를 설계하는 방안을 제시하였다. 안테나의 해석을 위해 적합도 함수로서 FDTD 기법을 사용하였고, 정방형 패치의 길이, 접지면 슬롯의 길이, 중심선으로부터 급전점까지의 거리가 최대의 대역폭과 최소의 크기를 가지기 위한 최적화 파라미터로 사용되었다. 실제 안테나를 제작하여 측정한 결과, 2.445 GHz에서 10 dB 대역폭이 15.63 %이고, 최대 이득이 3.61 dBi이며, 일반 마이크로스트립 안테나에 비해 크기는 54.8 % 감소하였다.

• Structural Engineering and Mechanics
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• 제44권3호
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• pp.379-403
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• 2012

In recent years, the need for optimal design of structures under time-history loading aroused great attention in researchers. The main problem in this field is the extremely high computational demand of time-history analyses, which may convert the solution algorithm to an illogical one. In this paper, a new framework is developed to solve the size optimization problem of steel truss structures subjected to ground motions. In order to solve this problem, the covariance matrix adaptation evolution strategy algorithm is employed for the optimization procedure, while a generalized regression neural network is utilized as a meta-model for fitness approximation. Moreover, the computational cost of time-history analysis is decreased through a wavelet analysis. Capability and efficiency of the proposed framework is investigated via two design examples, comprising of a tower truss and a footbridge truss.

• 한국의류산업학회지
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• 제22권3호
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• pp.368-377
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• 2020

This study provided basic data to develop functional and fitness cycling wear for cyclists. We analyzed the domestic and overseas cycling wear brand patterns for tops and tights as well as compared pads attached to tights. The results were as follows. The tops of the cycling wear were designed with cutting lines in the lateral or yoke in the back to reflect cycling posture. It is necessary to study if there is a difference in the air resistance or fitness of the athlete. The sleeve hem band affected by arm movement during cycling, proper sewing and band pressure are also important. The tights have a brand that does not insert a band in front of the waist in consideration of the cyclist's breathing. It should take into account methods of constructing a proper garment pressure that does not interfere with cycling. Analyzing the cycling pad indicated that the three-dimensional shape and size of the pad show many differences for each brand, indicating a difference in cycling movement suitability. In addition, many of the cutting lines should account for the productive aspects because of the high consumption of the fabric in order to design a pattern considering the cycling posture.

• 대한의생명과학회지
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• 제16권3호
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• pp.151-159
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• 2010

The peroxisome proliferator-activated receptor $\alpha$ (PPAR$\alpha$) is a nuclear transcription factor that plays a central role in lipid metabolism and obesity. Exercise also is a powerful modifier of the manifestations of the lipid metabolism and obesity in animal models and humans with obesity and metabolic syndrome. However, effects of exercise on lipid metabolism and obesity in normal-weight younger female subjects, having functional ovaries and not metabolic disease, remain unexplained. To explore the effects of exercise on the development of obesity and its molecular mechanism in high fat diet-fed female C57BL/6J mice, we experimented the effects of swim training on body weight, adipose tissue mass, serum lipid levels, morphological changes of adipocytes and the expression of PPAR$\alpha$ target genes involved in fat oxidation in skeletal muscle tissue of female C57BL/6J mice. Swim-trained mice had significantly decreased body weight, adipose tissue mass, serum triglycerides compared with female control mice. Histological studies showed that swim training significantly decreased the average size of adipoctyes in parametrial adipose tissue. Swim training did not affect the expression of PPAR$\alpha$ mRNA in skeletal muscle. Concomitantly, swim training did not increase mRNA levels of PPAR$\alpha$ target genes responsible for fatty acid $\beta$-oxidation, such as carnitine palmitoyltransferase 1, medium chain acyl-CoA dehydrogenase, enoyl-CoA hydratase/3-hydroxyacyl-CoA dehydrogenase, and thiolase in skeletal muscle. In conclusion, these results indicate that swim training regulates lipid metabolism and obesity in high fat diet fed-female mice although swim training did not increase mRNA levels of PPAR$\alpha$ target genes involved in fatty acid $\beta$-oxidation in skeletal muscle, suggesting that swim training may prevent obesity and improve fitness through other mechanisms in female with ovaries, not through the activation of skeletal muscle PPAR$\alpha$.

• 한국의류학회지
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• 제30권11호
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• pp.1507-1518
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• 2006

The middle-aged body differs from the youthful body and has its own body type due to the considerable difference in body structure by age. However, most ready-made clothes for middle-aged women are designed according to the youthful body types. They are looking for the better fitness of the ready-made clothes. Thus clothing fitness is strongly required for a middle-aged women. The purpose of this study is to analyze the basic characteristics of middle-aged women's body types and to compare the real somatotype and cognitive somatotype. The subjects are 238 middle-aged women between 35 and 49 years old living in Daegu. Data are collected through anthropometric measurement and questionnaire on somatotype from September to October 2004. The results are as follows: 1. Using factor analysis, cluster analysis is carried out and the subjects of this research are classified into 4 groups. 2. Middle-aged women usually are not satisfied with their body. Particularly, they show the lowest satisfaction measurement about their abdominal girth, weight, and overall body-shape in total 16 categories. 3. As a result of body cathexis for each part, women are usually not satisfied with their body parts for themselves, regardless of real somatotype. 4. As I divide middle-aged women's somatotype by Rohrer index into the groups of three body-types, then examine real somatotype and cognitive somatotype, I get the following result : The slimmer their bodies are, the more satisfied middle-aged women we. Besides, 40.3% of middle-aged women have an incorrect and distorted understanding of their somatotype. 5. As a result of this research for ideal state of body-size, the women shows their Ideal sizes as follow: 160.55cm for ideal height, 88.73cm for ideal bust girth, 71.14cm for ideal waist girth, 90.03cm for ideal hip girth, and 53kg for ideal weight.

• 한국지능시스템학회논문지
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• 제7권2호
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• pp.16-24
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• 1997

본 논문에서는 각각의 유전자 개체가 그 자신의 나이를 갖는 수정된 유전자 알고리즘을 제안한다. 그래서 하나의 개체는 그 자신의 나이가 0이 되었을때 만이 사라지게 되며, 결국 개체들의 수가 동적으로 증가할 것이다. 이러한 방법은 좋은 특성을 갖는 유전자들을 그들의 적합도에 상응하게 매겨진 나이에 따라서 몇세대에 걸쳐 살아있게 함으로서 그들의 좋은 형질을 좀더 보존할 수 있는 능력을 유전자 알고리즘이 갖추게 만든다. 그러므로, 이러한 방법은 기존의 방법보다 더욱 좋은 성능을 내게 된다.우리는 이 방법을 실험하기 위하여 함수최적화 문제를 이용하여 시뮬레이션하였다. 제안한 방법의 효율성을 보이기 위하여, 세가지의 나이를 먹는 방식을 제안하였다. 본 논문의 아이디어와 유사한 연구논문이 있었는데, 이 연구에서 성능이 가장 좋은 방식을 채택하여 실험하였다. 또한 원래의 간단한 유전자 알고리즘도 실험을 하여 성능을 비교 하였다. 그러나, 기존의 방식은 나이를 산정할때 적합도롤 고려하지 않음으로서 본 논문에서 제안한 방식보다 몇몇 측면에서 성능이 좋지 않았다.

• 한국의류학회지
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• 제33권11호
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• pp.1683-1695
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• 2009

This study analyzes the production process of eight domestic companies that manufacture scuba diving suits for men with an emphasis on the level of consumer satisfaction in scuba diving suits purchases. One hundred fifty questionnaires were distributed and a total of 140 usable data were coded for further statistical analysis that includes descriptive statistics (frequency and ${\chi}^2$ test) through SPSSWIN 17.0. The results show that a majority of the domestic scuba diving suit companies were either small, manufactured products under original equipment manufacturer (OEM) brands, or were involved in the import business. Many of these companies have developed a local sizing system derived from a company database of customer sizing. As a result, different companies have different sizes that lead to confusion and complication among consumers in selecting the correct size for scuba diving suits. The results indicate that most high-priced diving suits are made of imported fabrics because they had superior quality, fitness, and thickness compared to domestic brands. The degree of consumer satisfaction with scuba diving suits was found to be low in comfort, stuffiness, and activity. Respondents indicated that they felt a little tightness in circumstances such as bust, wrist, and thigh in measurements of circumstances. On the other hand, the respondents showed a high degree of satisfaction with body fitness in scuba diving suits. Further research will clarify a standardized sizing system and develop patterns suitable for Korean men's scuba diving suit body sizes.