• 한국생활과학회지
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• 제14권2호
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• pp.303-312
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• 2005

The purpose of this research is to analyze the lower part of dress forms with different sectional rotation-angles ($e.g.\;9^{\circ},\;15^{\circ},\;30^{\circ},\;45^{\circ}$) using three-dimensional measurement system and to investigate measurement properties for dress making. The dress forms used in this experiment were size 8 and six types: four from Korea and two from Japan. The instrument and tools for three-dimensional measurement was Whole Body 3D scanner (Exyma-WBS2H). The analysis program used in this experiment was Rapid Form 2004 PP1 (INUS technology, Inc, Korea). The measurement of dress forms was done three times with different sectional rotation-angles and its data were analyzed using SPSS WIN 10.0 Package. The following results were obtained: 1. With mean and standard deviation of each measured part, it was found out that the dress forms from two countries were different in size per each part. For example, the Japanese one was relatively large in middle hip and hip, compared to the Korean one. 2. The 3D analysis of the sectional rotation-angles revealed some differences between the two dress forms in sectional length per each part. 3. With cluster analysis results, it was found that there were definite differences among measurements per each part, especially in $30^{\circ}\;and\;45^{\circ}$ sections. 4. The proportion of the dress forms showed significant differences in the curvature between center and side section of the lower parts. In addition, the shapes on the horizontal section map of the four levels (waist, middle hip, hip, and bottom) were analyzed.

• 한국멀티미디어학회논문지
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• 제20권2호
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• pp.225-233
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• 2017

Line-laser beams are used for accurate measurement of 3D shape, which is robust to external illumination. For depth measurement, we project a line-laser beam across an object from the face and take an image of the beam on the object surface using a CCD camera at some angle with respect to the face. For shape measurement, we project parallel line-laser beams with narrow line to line distance. When a layer of thin materials attached to a cylinder is long narrow along its circumference, we can measure the shape of the layer with a small number of parallel line beams if we project line beams along the circumference of the cylinder. Measurement of the depth of the attached materials on a line-laser beam is based on the number of pixels between an imaginary line along the imaginary cylinder without the attached materials and the beam line along the materials attached to the cylinder. For this we need to localize the imaginary line in the captured image. In this paper, we model the shape of the line as an ellipse and localize the line with least square estimate. The proposed method results in smaller error (maximum 0.24mm) than a popular 3D depth camera (maximum 1mm).

• 한방재활의학과학회지
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• 제25권2호
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• pp.81-88
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• 2015

Objectives The purpose of this review was to analyze the research trends in clinical research related to pelvic malposition published in Korean medicine journals. Methods We searched articles in Korean databases (OASIS, NDSL, RISS, and KTKP), and sorted the articles by publishing date, pelvic malposition type, field of study, and measurement index. Results 1. 25 original articles and 9 case report articles were reviewed. 2. In recent years, this topic has been studied more frequently, with an increasing number of original articles published. 3. 16 articles analyzed pelvic malposition type. And half of the articles focused on ilium. 4. The original articles have figured out the correlation between pelvic malposition measurement indices and other measurement indices or diseases. 5. Treatment tools, such as chuna therapy, the mckenzie method, devices for correcting malposition, acupuncture were used in the case report articles. 6. 29 measurement indices, such as Ferguson's angle, Ilium shadow measurement, and Iliac height difference were used. Conclusions According to the literature, pelvic malposition is related to other diseases and measurement indices, and manual medicine on pelvic malposition can be effective. However, due to the lack of sufficient empirical evidence from medical articles to support this, further clinical research should be conducted.

• 융합신호처리학회논문지
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• 제24권1호
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• pp.15-20
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• 2023

일반적으로 잘못된 앉은 자세를 장시간 유지하는 것은 척추에 나쁜 영향을 미치는 것으로 널리 알려져 있다. 최근 여러 연구자들이 잘못된 앉은 자세와 척추질환의 인과관계에 관심을 두고 있으며, 척추질환 예방을 위해 앉거나 서는 자세의 변화를 정밀하게 측정할 수 있는 방법을 연구해왔다. 우리는 과거 연구에서 실시간 체위 변환 측정이 가능한 센서 디바이스를 개발하고 운동량 계산 알고리즘을 적용하여 실시간 자세 전환 측정 정확도를 향상시켰으며, 체위 변환 측정 센서의 정확도를 검증하였다. 본 연구에서는 좌압 측정을 통해 체중심의 변화를 고려한 자세 측정 및 분석 장치를 개발하였으며, 개발된 센서는 사용자의 시각적 피드백을 개선하여 자세 교정 훈련 정확도를 높이는 보조 도구로의 활용 가능성을 확인하였다.

• 한국방사선학회논문지
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• 제18권4호
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• pp.327-334
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• 2024

본 연구의 목적은 당뇨병 환자의 맞춤형 족부질환 분석 및 관리 시스템 개발로 당뇨병성 족부질환 환자의 발 궤양 예방본 시스템은 영상분석 기술을 활용하여 족압뿐만 아니라, 발목의 변형, 신체의 균형, 발의 상처 여부 등의 다양한 데이터를 통하여 정확한 족부변형 상태 분석이 가능하고, 이를 기반으로 당뇨병성 족부질환 환자의 발의 정확한 변형 상태를 파악하여 맞춤형 인솔 제작을 하였다. 당뇨병 족부질환의 상처를 상태 확인 애플리케이션(App)의 사용 만족도 검사와 당뇨병성 족부질환 환자 및 족부질환 환자의 변성 상태를 파악하여 맞춤형 인솔을 착용하여 인솔 착용 만족도 조사연구이다. 연구 결과로 족저압력 측정 Knee angle은 -0.8 ± 1.3도였으며 최소 -2.4도에서 최대 1.1도의 분포를 보였고, 외반슬은 양쪽 하지 간에 유의미한 차이가 없었다(p = 0.534). 경골 각도는 양쪽 하지에 유의미한 차이가 있었다 (p < 0.001). 발목 각도(Ankle angle)는 왼쪽이 2.6 ± 2.0도였으며 최소 0도에서 최대 6.3도의 분포를 보였고, 오른쪽은 4.5 ± 2.1도였고 최소 1.5도에서 최대 9.1도의 분포를 보였다. 발목 각도는 양쪽 하지에 유의미한 차이가 있었다 (p = 0.011). 족저 압력 측정 애플리케이션에 평균 4.3점의 만족도를 느낀다고 응답하였으며. 맞춤형 인솔 사용에 대해 평균 3.9점의 만족도를 느낀다고 응답하였다.

• 대한기계학회논문집A
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• 제27권7호
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• pp.1095-1102
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• 2003

The most important thing in measuring the tool wear is to set up the measurement base. The end mill that is being used for machining of die is difficult to set up the base and to measure the tool wear because of geometric properties of that such as a helix and relief angle. In this study, a new instrument using spindle orientation function in end milling is developed to measure the tool wear and evaluated by the measuring system on the machine. Finally, this new method makes possible the wear measurement of same position and reduces the measuring time compared with the measuring methods such as the microscope and CCD.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2003년도 하계종합학술대회 논문집 V
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• pp.2887-2890
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• 2003

This paper describes the possibility of analyzing gait pattern from the variation of the lower leg electrical impedance. This impedance is measured by the four-electrode method. Two current electrodes are applied to the thigh, knee, and foot, and two potential electrodes are applied to the lateral, medial, and posterior position of lower leg. The correlation coefficients of the joint angle and the impedance change from human leg movement was obtained using electrogoniometer and 4ch impedance measurement system developed in this study. We found the optimal electrode position for ankle, knee and hipjoint movements based on high correlation coefficient, least interference, and maximum magnitude of impedance change. The correlation coefficients of the ankle, knee, and the hip movements -0.87, 0.957 and 0.80. respectively. From such features of the lower leg impedance, it has been made clear that different movement patterns exhibit different impedance patterns and impedance level. This system showed possibility that lower leg movement could be easily measured by impedance measurement system with a few skin-electrodes.

• Journal of electromagnetic engineering and science
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• 제5권2호
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• pp.97-103
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• 2005

This paper describes the measured results of sonobuoy transmitting antenna system for anti-submarine warfare (ASW). Since radiation pattern and power density depend on impedance matching between transmitting RF part and antenna with termination resistance, design of matching circuit is very important for sonobuoy system performance. Matching circuit is designed by Smith chart using control of L and C. In standing wave ratio(SWR) measurement using Network Analyzer, SWR of antenna with matching circuit observed 1.5 below at the assigned VHF band. It shows very excellent performance comparison with conversional product that is used for the same object. The measured vertical and horizontal radiation patterns are also shown the satisfaction of military specifications. A drop out of sonobuoy system on the sea is happened when angle of elevation direction is over 10 degrees, and it is conformed that it takes less than I second return to original signal level. The required electric power density is $83\;mW/m^2$ in the military specification, and measured electric power density is observed over average $110\;mW/m^2$ at all frequency bands.

• Applied Microscopy
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• 제44권2호
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• pp.61-67
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• 2014

Layered structures of fiber cell wall of Korean red pine (Pinus densiflora) were investigated by confocal reflection microscopy (CRM). CRM micrographs revealed detailed structures of the fiber cell wall such as S1, S2, and S3 layers as well as transition layers (S12 and S23 layers), which are present between the S1, S2, and S3 layers. Microfibril angle (MFA) measurement was possible for the S2 and S3 layer in the cell wall. The experimental results suggest that CRM is a versatile microscopic method for investigation of layered structures and MFA measurement in individual sub layer of the tracheid cell wall.

• International Journal of Quality Innovation
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• 제5권1호
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• pp.68-84
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• 2004

The measured values of a same object should remain constant regardless of the object's position in the image. In other words, its measured values should not vary as its position in the image changes. However, lens' image distortion, heterogeneous light source, varied angle between the measuring apparatus and the object, and different surroundings where the testing is set up will all cause variation in the measurement of the object when the object's position in the image changes. This research attempts to compensate the machine vision image distortion caused by the object's position in the image by developing the compensation table. The compensation is accomplished by facilitating users to obtain the correcting object and serves the objective of improving the precision of measurement.