• Journal of the Korean Home Economics Association
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• v.40 no.8
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• pp.13-21
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• 2002

본 연구의 목적은 유방절제수술을 받은 여성들을 위해 개발한 다섯 종류의 브래지어와 두 종류의 보정물 유형에 따른 착용감과 쾌적성을 검토하기 위한 것이다. 피험자로는 유방절제시술기간이 3년 이상이며 브래지어 사이즈 85에 컵사이즈 A컵인 여성 세 명을 선정하였다. 실험방법은 보정물을 삽입한 브래지어를 하루에 최소 15시간 이상 연속착용하도록 하고 실험복을 착용한 상태에서 피험자들의 일상과 그에 소요된 시간을 기록하도록 하였으며 이 때 착용한 브래지어와 보정물에 대한 느낌을 5점 척도로 표시하게 하였다. 실험기간은 다섯 종류의 브래지어를 하루에 한 가지씩 정해진 순서대로, 처음 5일은 옥보정물과 함께 착용하도록 하고 그 후 5일은 스펀지 보정물과 함께 착용하도록 하였으며 이러한 순서를 두 번 반복하게 하여 총 20일이 소요되었다. 각각의 피험자들에 대해서는 실험이 진행되는 동안 반복적인 면접을 통하여 진행상황을 기록하였으며 아울러 실험복에 대한 제언을 수렴하여 보다 나은 제품개발을 위한 기본 자료화하였다. 실험결과는 다음과 같다. 1. 브래지어에 있어서는 세 명의 피험자가 일치된 결과를 나타내어 일반적인 브래지어 형태와 가장 유사하면서 어깨 끈과 하변밴드 폭만 약간 넓혀준 실험복이 착용감에서 가장 높은 점수를 받았다. 착용자의 편의를 고려하여 앞트임으로 제작한 실험복의 경우에는 앞으로 구부렸을 때 밴드부분이 꺾이는 현상이 생겼으며 피험자들이 모두 뒤트임에 익숙하여 앞트임 브래지어 착용에 불편함을 나타내었다. 브래지어 착장평가에 있어서는 피험자들의 일상적인 행동이나 보정물의 종류가 영향을 미치지 않는 것으로 나타났다 2. 보정물 평가에 있어서는 모든 피험자가 옥가루 재질의 보정물만으로는 수술부위를 자극하는 느낌이 든다고 하였으나 3mm 두께의 스펀지와 함께 삽입했을 때는 아무런 문제가 없는 것으로 나타났다. 또한 보정물의 무게 조절이 가능하므로 실리콘재질의 보정물에서 쉽게 찾아볼 수 있는 무게에 대한 문제를 제기한 피험자는 없었다. 그러나 스펀지로 제작된 보정물에 대해서는 무게가 너무 가벼워 모든 피험자들이 양 쪽 가슴의 균형이 잘 맞지 않는다고 답하였으며 특히, 운동을 즐기고 활동이 많은 피험자의 경우 스펀지로 제작된 보정물에 대해 큰불만을 표시하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.137-137
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• 2003

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2003.10a
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• pp.108-108
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• 2003

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.9
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• pp.1060-1069
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• 2019

Pedestrian-based camera self-calibration methods are suitable for video surveillance systems since they do not require complex calibration devices or procedures. However, using arbitrary pedestrians as calibration targets may result in poor calibration accuracy due to the unknown height of each pedestrian. To solve this problem in the real surveillance environments, this paper proposes a novel Bayesian approach. By assuming known statistics on the height of pedestrians, we construct a probabilistic model that takes into account uncertainties in both the foot/head locations and the pedestrian heights, using foot-head homology. Since solving the model directly is infeasible, we use variational Bayesian inference, an approximate inference algorithm. Accordingly, this makes it possible to estimate the height of pedestrians and to obtain accurate camera parameters simultaneously. Experimental results show that the proposed algorithm is robust to noise and provides accurate confidence in the calibration.

• Geophysics and Geophysical Exploration
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• v.13 no.4
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• pp.315-322
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• 2010

The phase-screen and the split-step Fourier migrations, which are implemented in both the frequency-wavenumber and frequency-space domains by using one-way scalar wave equation, allow imaging in laterally heterogeneous media with less computing time and efficiency. The generalized-screen migration employs the series expansion of the exponential, unlike the phase-screen and the split-step Fourier migrations which assume the vertical propagation in frequency-wavenumber domain. In addition, since the generalized-screen migration generalizes the series expansion of the vertical slowness, it can utilize higher-order terms of that series expansion. As a result, the generalized-screen migration has higher accuracy in computing the propagation with wide angles than the phase-screen and split-step Fourier migrations for media with large and rapid lateral velocity variations. In this study, we developed a 2D prestack generalized-screen migration module for imaging a complex subsurface efficiently, which includes various dips and large lateral variations. We compared the generalized-screen propagator with the phase-screen propagator for a constant perturbation model and the SEG/EAGE salt dome model. The generalized-screen propagator was more accurate than the phase-screen propagator in computing the propagation with wide angles. Furthermore, the more the higher-order terms were added for the generalized-screen propagator, the more the accuracy was increased. Finally, we compared the results of the generalizedscreen migration with those of the phase-screen migration for a model which included various dips and large lateral velocity variations and the synthetic data of the SEG/EAGE salt dome model. In the generalized-screen migration section, reflectors were positioned more accurately than in the phase-screen migration section.

• Geophysics and Geophysical Exploration
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• v.16 no.2
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• pp.71-78
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• 2013

The one-way wave equation migration is much more computationally efficient comparing with reverse time migration and it can provide better image than the migration algorithm based on the ray theory. We have developed the prestack depth migration module adopting (GS) propagator designed for vertical transverse isotropic media. Since GS propagator considers the higher-order term by expanding the Taylor series of the vertical slowness in the thin slab of the phase-screen propagator, the GS migration can offer more correct image for the complex subsurface with large lateral velocity variation or steep dip. To verify the validity of the developed GS migration module, we analyzed the accuracy with the order of the GS propagator for VTI media (GSVTI propagator) and confirmed that the accuracy of the wavefield propagation with the wide angles increases as the order of the GS propagator increases. Using the synthetic seismic data, we compared the migration results obtained from the isotropic GS migration module with the anisotropic GS migration module. The results show that the anisotropic GS migration provides better images and the improvement is more evident on steeply dipping structures and in a strongly anisotropic medium.

• The Science & Technology
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• v.28 no.4 s.311
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• pp.80-81
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• 1995

정보유통의 개척자로 국내정보통신 발전에 기여하고있는 <주>삼보정보통신은 노동부 산하 산업인력관리공단의 국가기술자격정보를 DB화하여 전화 한통화로 각종 시험안내에서부터 합격자 발표까지 서비스하고 있다.

• Korean Journal of Optics and Photonics
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• v.11 no.5
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• pp.317-322
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• 2000

We present a compensation method of the phase change upon reflection in the scannll1g whIte light interferometry. which pracl1cally allows precIse 3-D profIle mappmg for compo~Ite target surfaces comprising of multipledissinular matenals. The compensation method estimates the vanatlon 01 pbase change with the spectral distribution of the light source through first-order approximation, and then diIectly compensates the measurement errors by perIormmg two-wavelength white light intetferomctric measurements. Experimental results prove that the proposed self-compensatIOn mcthod is capable of reducing the measmement error in step height gauging within $\pm2nm$..

• Korean Journal of Optics and Photonics
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• v.32 no.4
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• pp.172-179
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• 2021

A near-normal-incidence ellipsometer (NNIE) is suggested as an optical critical dimension (OCD) measurement system that is highly sensitive to the bottom defect of a sample with high-aspect-ratio structured patterns. Incident light passes through a polarizer and a phase retarder in sequence, and the reflected light from the sample also passes through them, but in reverse order. The operating principle of this NNIE, where a single polarizer and a single phase retarder are shared by the incident and reflected light, is studied, and a method to determine the ellipsometric constants from the measured intensities at proper combinations of the azimuthal angles of polarizer and retarder is presented.

• Journal of Korea Game Society
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• v.17 no.5
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• pp.133-142
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• 2017

Recently, screen climbing contents such as sports climbing learning program and screen climbing games. Especially, there are many researches on screen climbing games. In this paper, we propose the skeleton correction method based on the body area of a climber to improve the posture recognition accuracy. The correction method consists of the modified skeletal frame normalization with abnormal skeleton joint filtering, the classification of body area into joint parts, and the final skeleton joint correction. The skeletal information obtained by the proposed method can be used to compare the climber's posture and the ideal climbing posture.