• 한국의류산업학회지
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• 제7권1호
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• pp.63-69
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• 2005

The purpose of this study is to evaluate the differences of visual effects by variations in the location of the waistline and the width of the round belt of the basic skirt. The stimuli are 21 samples: 7 variations of the location of the waistline and 3 variations of the width of the belt. The data has been obtained from 43 fashion design majors. The data has analyzed by frequency, factor analysis, anova, scheffe's test and the MCA method. The results of this study are as follows. The visual effects by variations of the location of the waistline and the width of the belt are composed of 3 factors: the shape of the front part of the abdomen, the shape of the side part of the abdomen, and the length of the upper body. The visual effects by variations of the width of the belt have partial significant differences. The visual effects by variations in the location of the waistline have significant differences in all factors. The interaction effects between the location of the waistline and the width of the belt have not significant differences in all factors.

• Structural Engineering and Mechanics
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• 제72권5호
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• pp.585-595
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• 2019

Foundations are a vital part of structures. Over time, the foundations can deteriorate due to unforeseen overloads and/or settlements, resulting in the appearance of cracks in the concrete. These cracks produce changes in the static and dynamic behavior of the affected foundation, which alter its load carrying capacity. In this work, non-destructive techniques of relative simplicity of application are presented for the detection, location, and quantification of damage, using numerical models, solved with the finite element method and Power Series. For this, two types of parameters are used: static (displacement and elastic curvature) and dynamics (natural frequencies). In the static analysis, the damage detection is done by means of a finite elements model representing a beam supported on an elastic foundation with a discrete crack that varies in length and location. With regard to dynamic analysis, the governing equations of the model are presented and a method based on Power Series is used to obtain the solution for a data set, which could be the Winkler coefficient, the location of the crack or the frequency. In order to validate the proposed methodologies, these techniques are applied to data obtained from laboratory tests.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2008년도 추계학술대회
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• pp.122-125
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• 2008

Even though many researchers studied the foot shape and dimension, those applications lacked. The purpose of this study was to develop insole pattern of elderly women according to footprint. Discrepancy in the classification criteria among of foot parameters complicates attempts for elderly women classification of foot sole. To develop a footprint-based classification technique for the classification of foot sole types by allowing simultaneous use of several parameters. Foot sole data from static standing footprints were recorded from 48 elderly women. The factors of footprint shape were determined. Cluster analysis was applied to obtain individual foot sole classifications. The classification model of foot insole is proposed for a classification of footprint in elderly women. An application of ANOVA, Duncan's analysis, frequency analysis, factor analysis, and cluster analysis have been made to footprint data. In order to make clear foot sole characteristics, the factors of footprint shape have been discussed. The results are as follows. The factors of footprint shape have been classified into four types: foot length, sole slope, outside sole slope, and foot width. The types of foot sole shape have been classified into four types: longed, shortened, outside sloped, and toes sloped.

• 복식문화연구
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• 제13권2호
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• pp.255-268
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• 2005

The purpose of this study was to identify the physical characteristics of early adolescent girls by age. A total of 529 girls aged between 10 and 14 were measured and data were collected from 42 anthropometric and 41 photographic measurements per a person. SAS 8.1 was used in data analysis including means, standard deviations, t-test, Duncan test and frequency analysis. The results of this study are as follows. Most items related to height and length increased significantly at the age of $10\sim11$ and the growth slowed down at the age of $13\sim14$. As for items related to circumference, the growth rate was high at the age of $11\sim12$, and gradually slowed down afterward. Out of circumference items, hip circumference showed the highest growth rate. As for items related to thickness and width, thickness-related items grew quickly at the age of $10\sim12$, and among which bust thickness showed the highest growth rate. As for drop, the difference between hip circumference and waist circumference was most remarkable, but the difference between hip circumference and bust circumference was not large. The largest number of subjects had their menarche during the age of $11\sim12$ and, after menarche, their horizontal growth became active.

• 대한가정학회지
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• 제40권12호
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• pp.119-129
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• 2002

This research aims at finding out situation on purchasing clothes for kids, size recognition and fitting to provide basic data in order to establish standard sizes for kids' clothes. A survey was conducted to 360 mothers who have children ranging from first to third grade in elementary school on clothes purchasing method, wearing situation, criteria in deciding size and fitting preference. In terms of data analysis, frequency, percentage, mean, $X^2$-test, ANOVA and Duncan-test were used via SPSS PC program. The result is as follows; 1. While the recognition on brand was high, the recognition on body size was low: as a result, it is believed that it would be effective to mark the weight along with the brand. 2. Many times, they would select one or two size bigger on all items and they would go for a regular or one that fits as far as filling is concerned showing that it is different from adult clothes. 3. As far as obese kids, they would choose based on the diameter, so the diameter item is right but they are too long in general. The length question should be given special attention when manufacturing clothes for obese kids.

• 한국운동역학회지
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• 제20권4호
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• pp.421-427
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• 2010

The purpose of this study was to investigate the relationship between the quantitative analysis of biomechanical movement and the qualitative analysis of video software in order to evaluate for the walking movement. The fourteen collegiate students who agreed with the purpose and method of this study participated as subjects. The slow walking and fast walking of the subjects in the place of experiment were photographed, and calculated several mechanical factors. This empirical evidence from the experiment indicated the significant difference(p<.001) between each distant factors of the walking movement for both analyses methods, but there was no statistically significant difference between the spacial factors observed in the experiment. For more detail, no significant difference between the walking ratios that expressed the coordination between stride length and stride frequency was found. The findings also indicated the high coefficient of correlation(over r=.9) which supports higher explanation force for the biomechanical method and the Dartfish video software method. Therefore, if the data was gathered by using the proper experimental method, the video software method could be used just like the quantitative data of biomechanical method.

• 대한원격탐사학회지
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• 제37권1호
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• pp.57-67
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• 2021

An earthquake occurred on 17 November 2017 in Pohang, South Korea with a strength of 5.4 Mw. This is the second strongest earthquake recorded by local authorities since the equipment was first installed. In order to improve understanding of earthquakes and surface deformation, many studies have been conducted according to these phenomena. In this research, we will estimate the surface deformation using the Okada model equation. The SAR images of three satellites with different wavelengths (ALOS-2, Cosmo SkyMed and Sentinel-1) were used to produce the interferogram pairs. The interferogram is used as a reference for surface deformation changes by using Okada to determine the source of surface deformation that occurs during an earthquake. The Non-linear optimization (Levemberg-Marquadrt algorithm) and Monte Carlo restart was applied to optimize the fault parameter on modeling process. Based on the modeling results of each satellite data, the fault geometry is ~6 km length, ~2 km width and ~5 km depth. The root mean square error values in the surface deformation model results for Sentinel, CSK and ALOS are 0.37 cm, 0.79 cm and 1.47 cm, respectively. Furthermore, the results of this modeling can be used as learning material in understanding about seismic activity to minimize the impacts that arise in the future.

• 지구물리와물리탐사
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• 제16권3호
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• pp.139-144
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• 2013

유한길이의 다중 송수신 쌍극자에 의한 수평다층구조의 시간영역 전자기장을 계산하기 위한 컴퓨터 프로그램을 개발하였다. 시간영역 반응은 주파수영역에서 계산된 값에 빠른 역푸리에변환(inverse fast Fourier transform: FFT)을 적용하여 효율적으로 얻을 수 있다. 먼저 대수영역에서 등간격으로 한 decade 당 10개의 주파수영역 반응을 구한 후 FFT를 적용시키기 위해 3차 스플라인 사이채움(cubic spline interpolation)을 실시한다. 이 때 위상의 경우에는 스플라인 사이채움 이전에 위상곡선을 연속적으로 만들어 주는 과정이 추가된다. 스플라인 사이채움된 자료들은 송신전류파형과 곱말기(convolution)를 한 후 FFT를 통해 시간영역 자료로 만들어진다. 이 논문에서는 step-off 파형만 고려하였다. 개발된 시간영역 프로그램은 해석해와 해양 탄화수소 저류층 모델에 대한 반응을 이용하여 검증하였으며, 그 결과는 충분히 정확함을 확인 할 수 있었다.

• 한국가스학회지
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• 제22권3호
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• pp.53-64
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• 2018

천연가스는 폭발성 유체로 고압의 매설 배관 파손시 심각한 인적/물적 손해를 야기할 수 있으며, 최근에도 실제 매설 배관의 파손으로 상당한 인명피해가 발생한 사례가 보고되고 있다. 국내의 경우, 급속한 성장 및 보급에도 불구하고 천연가스 배관의 운영 길이와 운영기간이 짧아 가스배관의 사고원인 등에 대한 유효한 사고데이터의 확립이 부족한 실정이다. 국내에서 사고 사례에 대한 데이터베이스를 체계적으로 구축하기 위하여 국내보다 천연가스 배관의 운용 역사가 길고, 긴 배관망을 갖고 있는 해외 주요국에서 발생한 최근의 천연가스 배관관련 사고의 원인과 빈도를 분석하는 것이 필요하다. 따라서 본 연구에서는 해외 주요국에서 가스배관의 사고원인별 발생 빈도의 추이를 파악한 후 이를 비교 분석하여 국내 고압가스 운송 배관망의 안정성 확보의 토대를 구축하고자 하였다.

• 한국ITS학회 논문지
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• 제12권3호
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• pp.78-86
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• 2013

모노폴과 IFA(Inverted F Antenna)가 함께 동작하는 하이브리드 안테나를 이용한 MIMO(Multi Input Multi Output) 안테나를 설계한다. 안테나 공간을 줄이기 위하여 Vlade(Vertical lade)기법을 적용하며, 데이터통신을 위해 베어보드 상하단에 대각선으로 급전하는 MIMO 안테나를 설계한다. 설계를 위한 각 부분 길이를 변수로 하여 반사손실 특성의 변화를 나타낸다. LTE700, CDMA, GSM, DCS, PCS 및 WCDMA의 6중 주파수대역에서 동작하는 안테나를 설계하고 이를 구현한다. 구현된 안테나에 대한 반사손실 측정결과, VSWR 3:1 기준으로 설계대역 전체를 만족하였다. 또한 안테나에 대한 방사특성은 LTE700/CDMA/GSM 주파수대역에서 평균이득 -3.76 ~ -2.53dBi 및 42.06 ~ 55.84%의 효율, DCS/PCS/ WCDMA 주파수대역에서는 평균이득 -3.27 ~ -1.21dBi 및 47.08 ~ 75.6%의 효율을 보였다. MIMO특성 중 중요한 요소인 2안테나 간의 분리도는 전 밴드에서 -8.14 ~ -25.77dB로써 양호한 특성을 보였다.