• Physical Therapy Rehabilitation Science
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• 제10권4호
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• pp.430-437
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• 2021

Objective: The purpose of this study was to investigate the effect of 3-dimensional posture correction(3DPC) exercise program incorporating PNF respiratory muscle strengthening(RMS) exercise on spinal alignment and trunk expansion in patients with idiopathic scoliosis and the difference in intervention effect by type of idiopathic scoliosis. Design: Comparative study using paired t-test and analysis of variance measures. Methods: The subjects of this study were 5 men and 24 women diagnosed with idiopathic scoliosis with a Cobb angle greater than 10 degrees and less than 45 degrees. A 3DPC exercise program incorporating PNF RMS exercise was conducted twice a week for 1 hour per session for 6 weeks, and Cobb angle, Angle of trunk rotation, and trunk expansion were measured before and after the intervention. Results: After the intervention, Cobb angle and trunk rotation angle showed a statistically significant decrease, and trunk expansion showed a statistically significant increase. In the effect difference by type, there was a statistically significant difference in the angle of trunk rotation of the thoracic in 3C and Single Lumbar. Conclusions: In conclusion, it is thought that a 3DPC exercise program incorporating PNF RMS exercise can be effectively used in clinical practice to improve spinal alignment and trunk expansion in patients with idiopathic scoliosis.

• 제어로봇시스템학회논문지
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• 제9권4호
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• pp.284-295
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• 2003

The servo tracks of disk drives are constructed at the time of manufacture with the equipment of servo track writer. Because of the imperfection of servo track writer, disk vibrations and head fluctuations during servo track writing process, the constructed servo tracks might deviate from perfect circles and take eccentric shapes. The servo track writing error should be corrected because it might cause interference with adjacent tracks and irrecoverable operation error of disk drives. The servo track writing error is repeated every disk rotation and so is periodic time function. In this paper, we propose a new correction algorithm of servo track writing error based on iterative teaming approach. Our correction algorithm can learn iteratively the servo track writing error as accurately as is desired. Furthermore, our algorithm is robust to system model errors, is computationally simple, and has fast convergence rate. In order to demonstrate the generality and practical use of our work, we present the convergence analysis of our correction algorithm and some simulation results.

• 한국의류학회지
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• 제45권6호
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• pp.935-948
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• 2021

This study aimed to typify men's beliefs, perceptions, values, and attitudes, regarding foundation underwear, and examine the characteristics of each perception. Thirty-one statements on men's correctional underwear were selected, and Q classification was conducted with 20 men in their 30s and 40s as the P samples. Factors were extracted using principal component analysis and varimax rotation. Type 1 was the "fit improvement disadvantage cover type", which covered the target area, and improved the clothing fit. Type 2 was referred to as the "highlighting the advantages of chest correction" type, that was used to improve chest correction and exercise efficiency. "Positive wear for compensation of the abdomen", was listed as type 3, and was worn for abdominal correction. It was believed that type 3 could be used to correct body shape even if it was uncomfortable. Type 4, the "hip-up correction functional type", emphasized functionality based on its hip-up correction design.

• Clinics in Shoulder and Elbow
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• 제1권1호
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• pp.58-65
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• 1998

Cubitus varus deformity after supracondylar fracture of the humerus in children generally includes deformities of varus, hyperextension and internal rotation. Recently almost all corrective osteotomies for treatment of the varus deformity have been limited to correction of only the varus or of the varus and hyperextension deformity. Electromyographic study has revealed unphysiological joint motion and muscle activity around the joint in elbows with cubitus varus, hyperextension and internal rotation deformity. On this basis we have successfully attempted simultaneous correction of all three deformities. The end results in ] 3 elbows have been satisfactory without any complications such as delayed union, limitation of elbow motion or nerve palsy. In conclusion, we recommend simultaneous correction of the three elements of cubitus varus deformity to restore anatomic alignment of the elbow joint.

• 대한족부족관절학회지
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• 제23권4호
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• pp.143-148
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• 2019

Although many patients who undergo bunion repair do well and have satisfactory results, a critical evaluation of these results shows the potential for improvement. Metatarsal deformity of the hallux valgus is a 3-dimensional deformity, including rotation in the coronal plane. Theoretically, it is important to understand the 3-dimensional displacement of the first metatarsal for correcting the deformities of valgus rotation in the frontal plane. Yet the current methods of metatarsal osteotomy principally attempt to correct the deformity in the transverse plane. The modified technique for the Lapidus procedure can be used in a variety of hallux valgus conditions and severities, and the early results suggest that a powerful correction can be maintained. In addition, efforts have been made to correct the 3-dimensional deformity by performing metatarsal shaft osteotomy. In the case of degenerative arthritis, first metatarsophalangeal joint arthrodesis is a good option to correct the 3-dimensional deformation. Correction of the 3-dimensional deformity, including a rotational deformity in the frontal plane of the metatarsals, should be considered when selecting surgical treatment and is essential for achieving a good prognosis for patients with hallux valgus. This article reviews the classification and treatment of hallux valgus for correction of the 3-dimensional deformity.

• 한국광학회지
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• 제20권2호
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• pp.87-93
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• 2009

스테레오 영상에서 관찰자의 위치 변화는 왜곡 발생의 주요 원인이다. 특히, 디스플레이 장치의 중심을 기준으로 한 관찰자의 회전 이동은 관찰자 양안의 수평위치가 다르므로 수평, 전후 이동과는 다른 스테레오 영상의 왜곡이 크게 발생하게 된다. 본 논문에서는 전산모사를 통하여 관찰자의 회전이동에 의한 왜곡을 분석하였고 왜곡 보정결과도 보였다. 마지막으로 관찰자의 회전이동과 수평, 전후 이동의 왜곡형태를 비교를 통하여 두 이동에서 나타나는 왜곡의 형태가 다름을 보였다.

• 한국통신학회논문지
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• 제29권7A호
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• pp.794-806
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• 2004

본 논문에서는 IEEE 802.11a의 OFDM 통신시스템에 대한 송수신 주파수편차의 교정기법을 연구하고 편차주파 수들의 교정오차에 의한 잡음을 분석한다. 반송주파수편차에 의한 심볼당 회전위상을 짧은 훈련신호(short preamble)의 자기상관에서 추정한다. 잡음의 영향을 줄이기 위하여 짧은 훈련신호(short preamble)를 과도표본화 (over-sampling)한다. 파일롯(pilot) 신호를 도입하여 추정된 반송주파수편차의 오차와 표본화 주파수편차에 의한 OFDM 심볼당 회전위상을 추정한다. 이러한 회전위상의 추정과 교정에 CORDIC(Coordinated Rotational Digital Computer) 프로세서 또는 각도와 복소수의 환산표를 사용하고 이것들의 구현기법과 장단점을 비교한다. 복소수와 위상은 CORDIC 프로세서와 환산표에서 한정된 비트(bit) 개수로 계산되므로 각도양자화 오차가 있게 된다. 비트개수에 따른 각도양자화 오차를 OFDM 신호의 SNR로 나타내고 IEEE 802.11a의 편차주파수 교정에서 요구되는 최소한의 비트 개수를 제시한다. 끝으로, 모의실험을 통하여 짧은 훈련신호로 반송주파수편차를 추정하고 CORDIC 프로세서와 환산표에서 사용된 비트 개수에 따른 양자화 잡음을 검증한다.

• 대한족부족관절학회지
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• 제12권1호
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• pp.1-8
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• 2008

Purpose: To evaluate the value and limitation of modified Mau osteotomy through the review of 30 feet treated by this procedure. Materials and Methods: We retrospectively analyzed 30 cases treated with modified Mau osteotomy since 2002. The mean duration of follow-up was 10 months. We reviewed medical records to describe each case and select several clinical factors which related with surgical procedure and could influence on final results. We measured radiographic parameters such as hallux valgus angle (HVA), intermetatarsal angle (IMA), distal metatarsal articular angle (DMAA), sesamoid position and also assessed clinical outcomes by AOFAS score and satisfaction degrees. Results: The mean preoperative HVA and IMA were $40.4^{\circ}$, $17.4^{\circ}$ and the mean amounts of correction were $31.2^{\circ}$ and $11.5^{\circ}$. Amounts of delayed loss of correction were 16.8% in HVA and 19.2% in IMA. Initial HVA, rotational angle and translation distance of the distal fragment, stability of fixation, first ray instability were revealed as significant factors for the final result from this procedure. DMAA was increased by rotation of the distal fragment and decreased by adding translation on the rotation. Conclusion: Modified Mau osteotomy is an effective procedure to get enough correction. But, it is important to try to avoid excessive rotation of the distal fragment because it may worse joint congruity. It may be worthwhile to pay close attention to the direction of saw and stability of fixation.

• 한국임상수의학회지
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• 제35권5호
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• pp.200-205
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• 2018

This retrospective study is designed to compare the clinical results of tibial tuberosity transposition (TTT) and anti-rotation suture (ARS) treatments for medial patellar luxation (MPL). Medical records of 133 dogs were reviewed that had undergone surgical correction of MPL between January 2013 and May 2017. MPL correction was performed on 182 stifles, with TTT and ARS being performed on 101 stifles and 81 stifles. The common dog breeds receiving surgical treatment for MPL were Maltese, Pomeranian, Chihuahua and Poodle. Mean age of dogs with MPL was 32.6 months, and their mean body weight was 4.26 kg. Seventy dogs (52.6%) were male and 63 (47.4%) were female. Of the 182 stifles with MPL, grade II, III and IV were 18.7%, 72.0% and 9.3%. Total complications after TTT and ARS were recorded in 16.8% and 29.6%. Major complications after TTT and ARS were recorded in 5.9% and 12.3%, minor complications after TTT and ARS were recorded in 10.9% and 17.3%. The risk of complication and reluxation rate after TTT were significantly lower than that for ARS (p < 0.05). However, the rate of reluxation among dogs treated by ARS (1.2%) for grade II MPL was significantly lower than that for dogs treated by ARS (8.6%) for grade III MPL (p < 0.05). The TTT group had a shorter recovery period after surgical intervention than that in the ARS group (p < 0.001). In conclusion, TTT had a significantly lower incidence of complication and a shorter recovery period than ARS. However, ARS for grade II MPL appears to be a good surgical option for reducing the rate of reluxation after surgery. These results of this study could be used to provide therapeutic guidelines for surgical MPL correction in small-breed dogs.

• 한국멀티미디어학회논문지
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• 제16권1호
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• pp.42-49
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• 2013

비디오 열의 각 프레임에는 카메라의 움직임에 따라 물체의 평행 이동 및 회전 운동이 반영된다. 이 때 물체의 불필요한 회전 운동은 영상의 품질을 저하시킬 뿐 아니라 시청자 피로도를 증가시키는 주요 원인이 된다. 본 논문에서는 동영상 촬영 중 카메라의 불필요한 흔들림으로 인한 프레임의 회전을 변형된 모젯변환을 이용하여 보정하는 새로운 방법을 제시한다. 모젯 변환은 이산 라돈 변환의 한 종류로서, 회전된 프레임의 보정에 적용하기 위해 본 논문에서는 다음과 같이 변형한다. 먼저, 보다 정확한 회전각 추출을 위해 보간을 이용하여 bin 값을 계산한다. 그리고 현재 프레임과 기준 프레임에 대해 움직임 추정을 적용하여 카메라의 평행 이동을 보상한 후, 카메라의 회전에 따른 bin 값의 변화가 없는 영역을 설정하여 모젯 변환을 적용한다. 또한 모젯 변환의 각 투영 방향에 대해 한 개만의 bin을 계산함으로써 계산량을 감소시킨다. 평행이동 및 회전 운동을 갖는 다양한 시험 비디오 열에 대해 적용된 모의 실험을 통해 제안된 방법이 프레임의 회전을 보정하는데 매우 효율적임을 볼 수 있었다.