• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.725-730
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• 2007

본 논문에서는 인체 추적에 필요한 인체의 각 부위들을 구성요소로 각각 검출하여 연결하는 인체 모델을 통해 각 구성요소를 개별적으로 추정하게 된다. 여기서 인체의 구성요소 중 동작 추적에 가장 필요한 6개 부위로 구성된 구성요소인 머리, 몸통, 왼팔, 오른팔, 왼발, 오른발 등을 검출하여 추적한 후, 각 구성요소의 중심값과 색상정보를 이용하여 이전 프레임과 현재 프레임 간에 연결성을 두여 각 구성요소를 개별적으로 확률 전파를 통해 추적되어지고, 각 구성요소의 추적 결과는 구성요소들의 추정 결과를 구성요소 기반 확률 전파를 이용하여 인체의 동작을 추정하는 방법을 제안한다. 입력 영상에서 피부색 등의 색상 정보를 이용하여 인체 부위 또는 인체 모델의 구성 요소들 각각의 중심값과 색상정보를 가지고 확률전파를 통해 이것이 어떤 동작인지 동작 추정이 가능하다. 본 논문에서 제안하는 인체 동작 추적 시스템은 유아의 동작교육에 이용되는 7가지 동작인 걷기, 뛰기, 앙감질, 구부리기, 뻗기, 균형 잡기, 회전하기 등에 적용하였다. 본 논문에서 제안한 인체 모델의 각 구성요소 부위들을 독립적으로 검출하여 평균 96%의 높은 인식률을 나타냈고, 앞서 적용한 7가지 동작에 대해서 실험한 결과 평균 88.5% 성공률을 획득함으로써 본 논문에서 제안한 방법의 타당성을 보였다.

• Journal of the Korea Society of Computer and Information
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• v.26 no.4
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• pp.143-147
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• 2021

The purpose of this study is to investigate how the application of a Thorax belt affects the stability of the spine in subjects with a wide infra-sternal angle. A total of 15 subject with wide infra-sternal angle participated in the experiment. Active Double leg lowering and active one-leg raising were performed with or without a thorax belt. Two spinal stability tests (active double lowering and active one-leg raising) performed with or without thorax belt application showed significant differences between each condition. Based on the results of present study, the application of a thorax belt is considered to be an effective therapeutic tool that can stabilize the spine to subjects with abnormally increased chest cage and spinal or trunk instability.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.224-229
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• 2019

This study was undertaken to provide correct posture guidance and reference material for sports injury and injury prevention programs, by analyzing body alignment and plantar pressure distribution in high school baseball players. Totally, 32 subjects were enrolled for the study. Body alignment was measured from the trunk imbalance, kyphotic angle, lordotic angle, pelvic tilt, and pelvic torsion. Foot pressure was measured from the left maximum pressure, right maximum pressure, left weight, and right weight. The mean and standard deviation of the measured factors were calculated and tabulated, and the correlation between body alignment and foot pressure distribution was analyzed using Pearson's correlation analysis. All statistical significance levels were set at 0.05. Body alignment and foot pressure distribution show a positive correlation between the lordotic angle of lumbar spine and the left maximum pressure. There was no correlation between trunk imbalance, kyphotic angle, lordotic angle, pelvic tilt, pelvic torsion, and the left·right weight distribution and the left·right maximum pressure of each foot. Results of this study determined that the increase of the lordotic angle of lumbar spine results in more force on one side of the foot, thereby increasing the maximum pressure. We believe our data could be a reference for exercise programs on physical alignment and plantar pressure distribution of athletes.

• Journal of the Korea Society of Computer and Information
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• v.25 no.1
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• pp.109-115
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• 2020

The shoulder refers to the area connecting the human torso and arms, and plays a key role in moving both arms. In particular, it plays the most important role in sending both hands behind the head or away from our bodies. In this paper, we measure the angles of the medial and lateral rotations of the arm from the shoulder, identify the symptoms associated with abnormalities, and propose ways to prevent these symptoms. The angle of medial rotation and lateral rotation of the upper limb in the shoulder is generally 70° ~ 90°. If the angle falls below the reference value or feels pain, something is wrong with the shoulder. In addition, a total of 100 people (50 men and 50 women each) were tested to determine patients with abnormalities.

• Korean Journal of Applied Biomechanics
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• v.18 no.4
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• pp.179-189
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• 2008

The purpose of this study was to investigate interjoint and intersegmental coordination of lower segments in skill process. For the investigation, we examined the difference of resultant linear velocity of segments and angle vs angle graph. Novice subjects were 9 male middle school students who have never been experienced a taekwondo. We analyzed kinematic variables of Side Kick motion through videographical analysis. The conclusions were as follows. 1. Examining the graph of novice subjects' maximal resultant linear velocity of the thigh, shank, and foot segment, as it gets closer to the end of the training, the maximal resultant linear velocity in each segment increases which can be assumed to be a result of the effective momentum transfer between adjacent segments. 2 This research showed a sequential transfer from trunk, to thigh, and then to shank as it gets closer to the end of learning at intersegment angular velocity, and it also showed pattern of throwlike motion and pushlike motion. 3. In three dimension of flexion-extension, adduction-abduction and internal-external rotation of the thigh and shank segment, the angle-angle diagram of knee joint and of hip joint showed that dynamic change was indicated at the beginning of learning but stable coordination pattern was indicated like skilled subject as novice subjects became skilled.

• Journal of Digital Convergence
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• v.17 no.12
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• pp.555-563
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• 2019

This study was to provide quantitative basic data on the forehand and backhand throw movements of flying disks. For this purpose, the kinematic variables were calculated using the three-dimensional motion analysis system. A comprehensive analysis of the study variables showed that it is important to throw flying disks accurately as well as far away, so in P2 and P3 it is necessary to control forward movement and concentrate on the rotation of the joints. In addition, rotational force transfer from pelvis to body is considered important for efficient rotational movement. The forehand was found to mainly utilize the movement of the upper extremity joint to perform throwing motion, while the backhand throw was found to be relatively utilized for the rotation of the torso and pelvis. Based on the quantitative data of this study, we hope that it can be used as a basic material for on-site training of Flying Discs.

• Journal of Ginseng Research
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• v.27 no.2
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• pp.62-65
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• 2003

Mineral that is included to wild ginseng rhizomes that is assumed that is born at X-ray diffraction(XRD) analysis result 20 appears as is different according to each part by whewellite. Whewellite is accumulated much on rhizomes in wild ginseng, but do not exist hardly from mail body of root. The 6 years that in rhizomes of ginseng yet whewellite decision unobserved. This is considered by thing associated with ingredient of growth period of mineral and soil of plantation. For from, may present possibility of years distinction if analyze ginseng, wild ginseng etc. variously. Whewellite's chemical formula seems to be decision that combine with carbon(C) of air by photosynthesis function that Ca because is CaC$_2$O$_4$(H$_2$O) in rises by rhizomes through radices and is formed.

• Journal of the Korea Society of Computer and Information
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• v.25 no.6
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• pp.155-164
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• 2020

In this paper, we proposed the dimensional system and pattern of middle-aged women's rashguard swimwear for breast cancer patients. First, a survey of 37 breast cancer patients was conducted to determine the preferred swimsuit design for breast cancer patients. According to a survey of breast cancer patients, a rashguard swimwear with a low-exposure chest was designed. It has a pocket shape in which the cap is easy to insert and the cap is fixed. Second, we developed a dimensional system for swimsuits for breast cancer patients. Using direct measurement data from Size Korea for 1,625 women aged 30 to 69, 17-sizes for breast cancer patient's swimsuits were set through cross-analysis of major dimensions, with a coverage rate of 74.3%. It also extracted a standard size of bust circ. 90cm, hip circ. 95cm, and trunk circ. 150cm. Third, we developed a pattern for the central size of the swimsuit for breast cancer patients. For this purpose, we first produced the first central size pattern, and then completed the pattern after modifying it through the second and third wearing experiments. Experimental suits were produced at each pattern-making stage to evaluate wearing fit and motion suitability. Finally, the reduction rate of each dimension item for optimal pattern production was obtained, and the lashguard swimwear pattern for breast cancer patients was developed.

• Korean Journal of Applied Biomechanics
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• v.19 no.4
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• pp.637-645
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• 2009

The purpose of this study was to investigate the biomechanical alterations in the punching motion of 10 elderly women after 12 weeks of taekwonaerobics training. Seven infrared cameras(Qualisys MCU-240) and 2 force platforms(Kistler-9286AA) were used to acquire raw data. The results were as follows. First, the minimum joint angles of the lower limbs had a statistically significant difference between both the dorsiflexion/plantar flexion(1eft, $p=0.001^*$) and the inversion/eversion(both, $p=0.009^*$, $p=0.04^*$) from the ankle angle. There were differences in abduction/adduction(left, $p=0.04^*$) from the knee angle, as well as internal/external rotation(both, $p=0.07^*$, $p=0.02^*$) from the hip angle. Second, the maximum resultant joint moments of the lower limbs had statistically significant differences in the inversion/eversion moment from the ankle joint(both, $p=0.05^*$, $p=0.05^*$), the abduction/adduction moment(left, $p=0.08^*$) from the knee joint, and the internal/external rotation moment(right, $p=0.09^*$) from the hip joint. Third, the maximum resultant joint powers of the lower limbs had a statistically significant difference both in flexion/extension joint powers(both, $p=0.05^*$, $p=0.01^*$) and in abduction/adduction(both, $p=0.02^*$, $p=0.00^*$) from the hip joint, as well as abduction/adduction(left, $p=0.00^*$) from the knee joint, In conclusion, the elderly women were somewhat changed after 12 weeks of taekwonaerobics training.

• Journal of Biomedical Engineering Research
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• v.21 no.2
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• pp.219-224
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• 2000

본 연구는 몸통의 반복적인 flexion/extension 동작 수행시 근전도신호를 측정하고 이들 신호에서 나타난 EMG parameters(median frequency, median power, RMS) 와 피실험자의 주관적 불편도의 변화양상간의 정량적인 관계를 알아보고자 수행되었다. 피실험자별로 3-5회 정해진 업무를 수행하였고 주관적불편도와 근전도 신호를 측정하였다. 실험결과 반복횟수가 증가할수록 주관적 불편도는 증가하였으며 각 task 별로 EMG parameter와 불편도의 증감율 간의 회귀분석과 상관분석을 수행한 결과 실험과 EMG parameter에 따른 변이는 존재했지만 대체로 RMS에 비해 MF와 MP의 증감율이 불편도 증감율과 상관관계가 높은 것으로 나타났다.