• The Journal of Korean Physical Therapy
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• 제33권3호
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• pp.148-154
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• 2021

Purpose: This study covered the effect of shoulder stabilization exercise on muscle activity, postural alignment and self-efficacy of the elderly people with round shoulders by visiting village hall in rural area. Methods: 40 elderly people with round shoulders were recruited for this study (experimental group: 20 subjects and control group: 20 subjects). The experimental group was asked to perform shoulder stabilization exercise 60 minutes per one time for 8 weeks and three times in a week and the control group was asked to receive education related to pain management for the initial one time. Before and after the experiment, we measured the subjects' muscle activity of upper trapezius, serratus anterior, infraspinatus, pectoralis major and the lower trapezius, then postural alignment of craniovertebral angle and round shoulder posture. In addition, self-efficacy is measured through the questionnaire. Results: Compared to the control group, the experimental group showed significant differences in the muscle activity of all muscles, posture alignment of the craniovertebral angle. round shoulder posture, and improvement of self-efficacy. Conclusion: We found that shoulder stabilization exercise is effective in muscle activity, postural alignment and self-efficacy of the elderly people through visit-rehabilitation service. This study can be used for improving the physical and mental abilities through active visit-rehabilitation service for areas where have poor medical benefits. It is considered that systematic visit rehabilitation service should have institutional framework ultimately.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 D
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• pp.1762-1764
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• 1999

We investigated the annealing effect on generating pretilt angle and aligning liquid crystal (LC) using the photo-depolymerization reaction in this study. In case of rubbing polyimide (PI) surface with the side chain, pretilt angle tends to increase with increasing the annealing time. It is considered because the steric interaction is increased by annealing which cause the side chain to come back to original position. For obliquely irradiating ultraviolet (UV) light on PI surface, pretilt angle shows to $0^{\circ}$ and is increased by annealing. The pretilt angle in rubbed PI surface is much higher than in photo-aligned PI surface. It is attributed to the steric interaction and the number of LC molecular arrangement on azimuthal direction. In addition. in case of obliquely irradiating UV light on PI surface. it showed LC alignment to increase by annealing. It can be regarded due to the fact that the re-alignment of LC molecule is improved to residual polymer direction by annealing.

• 한국도로학회논문집
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• 제14권5호
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• pp.123-132
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• 2012

PURPOSES: This study is to investigate the consideration which relates with a disaster from route alignment process and proposed the method it will be able to evaluate a disaster danger fixed quantity. METHODS: Use the landslide disaster probabilistic map of GIS based and in about landslide occurrence of the route alignment at the time of neighboring area after evaluating a risk fixed quantity, it compared LCC expense in about each alternative route. It developed the system it will be able to analyze a LCC and a disaster risk in about the alternative route. In order to verify a risk analytical algorithm and the system which are developed it selected national road 59 lines on the demonstrative route and it analyzed a disaster risk. RESULTS: Demonstrative route not only the disaster risk to be it will be able to compare a disaster risk fixed quantity like the economical efficiency degree in compliance with LCC expense productions it compared and there being the designer will be able to decide the alternative route, it confirmed. CONCLUSIONS: Roads can be designed by considering occurs repeatedly landslides and debris flow caused by disasters in advance and expect to be able to effect that can reduce the overall cost to recover losses caused by the disaster, and temporally loss is expected.

• 한국철도학회논문집
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• 제18권5호
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• pp.457-465
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• 2015

본 연구에서는 기존선 속도향상을 위한 곡선부 개량 시 승차감을 고려한 최적평면선형범위에 대한 평가방안을 제시하였다. 또한 다양한 선형설계 초기조건들이 허용개량범위와 승차감 측면에서 최적선형 범위에 미치는 영향을 파악하기 위한 매개변수 해석을 수행하였다. 이와 더불어 현재 경부고속선에 부설되어 있는 선형조건들 중 가장 작은 곡선반경을 가진 평면선형들에 대하여 최적 개량범위를 검토하였다. 해석결과, 주요 초기선형설계변수인 곡선반경과 캔트가 클수록 허용개량범위와 최적선형범위가 넓어짐을 알 수 있었으며, 경부고속선 자갈도상구간에 부설되어 있는 R7000/R8000의 경우에도 선형측면에서는 약간의 개량으로도 속도향상이 가능함을 알 수 있었다.

• 한국콘텐츠학회논문지
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• 제22권3호
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• pp.576-585
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• 2022

월경곤란증에 대한 원인을 규명하는데 있어서 인체 대칭성과 균형에 중점을 두어 진단할 필요가 있다. 본 연구 목적은 월경곤란증 정도에 따라 자세 정렬과 족저압 균형에 차이가 있는지를 비교·분석하고자 한다. 월경곤란증을 가진 20대 여대생을 대상으로 월경곤란증 정도에 따라 경증그룹과 중증그룹으로 구분하여 자세 정렬과 족저압 균형에 대해 측정하였으며, 월경곤란증과 자세 정렬에 대한 상관관계를 분석하였다. 그 결과, 월경곤란증 정도에 따라 어깨높이 비대칭성 각도에만 유의한 차이가 나타났으며(p<0.05), 골반 및 무릎 정렬에서는 유의한 차이가 없었다. 상관관계 분석에서는 월경곤란증 점수(MDQ)와 어깨높이 비대칭성 각도 간의 유의한 양의 상관관계(r=0.621, p<0.005)가 나타났다. 이러한 결과는 월경곤란증과 어깨관절의 부정렬이 연관성이 있음을 나타내며, 이러한 요인을 분석하기 위해 후속 연구에서는 월경곤란증을 가진 여성에 대한 척추 정렬에 대해서도 알아볼 필요가 있을 것으로 생각된다.

• 한국광학회지
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• 제15권4호
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• pp.391-396
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• 2004

인공위성용 지구관측 카메라나 우주관측 망원경에는 크기와 무게의 제약 때문에 Cassegrain 방식의 망원경이 많이 쓰인다. 이와 같은 우주광학계의 성공적인 임무수행을 위해서는 망원경부의 정밀한 광학정렬이 매우 중요하다. 본 논문에서는 정렬 정밀도에 따른 Cassegrain 방식 망원경부의 광학정렬 방법 중, 간섭무늬를 이용한 방법, 파면오차를 이용한 방법, 역최적화 광학정렬 방법 등을 모사를 통해 제시하고, 현재 개발 중인 구경 300 mm급 소형 위성용 카메라에 적용한 광학정렬 실험 결과를 정리한다.

• 대한치과의사협회지
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• 제49권7호
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• pp.398-409
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• 2011

With an increase of public's perception on "minimally invasive dentistry", more patients are demanding orthodontic alignment of anterior teeth rather than restorative treatment which is more invasive. One draw back of orthodontic alignment has been that it takes long time. To overcome this limitation, a new orthodontic device named Mini-Tube Appliance (MTA), have been developed. With the combined use of light NiTi wire and inter-proximal stripping, rapid anterior alignment can be obtained efficiently. This article presents the use of MTA for rapid alignment of anterior teeth and its clinical guidelines with typical case samples.

• 한국표면공학회지
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• 제47권6호
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• pp.347-353
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• 2014

We present a synthesis of single-walled carbon nanotubes(SWNTs) for enhancement of parallel-alignment and density using chemical vapor deposition with methane feed gas. As-purchased ST-cut quartz substrates were heat-treated and line-patterned by electron-beam lithography in order to grow SWNTs with parallel alignment. We investigated the effects of various synthesis parameters such as catalyst oxidation, reduction, and synthesis conditions in order to enhance both tube density and degree of parallel alignment. The condition of $1{\AA}$ of Fe catalyst film, atmospheric oxidation at $750^{\circ}C$ for 10 min, reduction under 400 Torr for 5 min, and growth at $865^{\circ}C$ under 300 Torr yields $33tubes/10{\mu}m$, which is the highest tube density with parallel alignment. Based on the results of atomic force microscope and Raman spectroscopy, it was found that SWNTs have diameter range of 0.8-2.0 nm. We believe that the present work would contribute to the development of SWNTs-based flexible functional devices.

• 전기학회논문지
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• 제68권1호
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• pp.108-121
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• 2019

This paper presents the study results on the design of the correction filter to improve the azimuth error estimation of the high-speed guided missile launched from the warship after the transfer alignment. We theoretically proved that the transfer alignment performance is determined by the accuracy of the marine inertial navigation system and the observability of the attitude error state variable in the transfer alignment filter, and that most of navigation errors in high-speed guided missile are caused by azimuth error. In order to improve the azimuth estimation performance of the correction filter, the multiple adaptive estimation method and the adaptive filters adapting the measurement noise covariance or the process noise covariance are proposed. The azimuth estimation performance of the proposed adaptive filter and the existing Kalman filter are compared and analyzed each other for 8 different transfer alignment accuracy cases. As a result of comparison and analysis, it was confirmed that the adaptive filter adapting the process noise covariance has the best azimuth estimation performance. These results can be applied to the design of correction filters for high-speed guided missile.

• Physical Therapy Rehabilitation Science
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• 제12권3호
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• pp.340-345
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• 2023

Objective: The purpose of this study was to investigate the effect of thoracic spine and ankle joint alignment on trunk and upper limb muscle activity during trunk forward lean exercise using a sling. Methods: 25 subjects participated in this study. All subjects performed trunk forward lean exercise using a sling under four conditions according to the alignment of the thoracic spine and ankle joints. Trials were performed 3 times in each condition. Muscle activity of the trunk and upper extremity was measured using electromyography. Results: In the dorsiflexion, the thoracic kyphosis condition showed significantly higher muscle activity in the pectoralis major, rectus abdominis, latissimus dorsi, transverse abdominis than dorsiflexion(p<0.05). In the plantar flexion, thoracic kyphosis condition showed significantly higher muscle activity in pectoralis major, transverse abdominis, latissimus dorsi muscle activity than dorsiflexion(p<0.05). Conclusions: Regardless of ankle alignment, thoracic kyphosis condition increased the activity of the pectoralis major, transverse abdominis, latissimus dorsi. Therefore, regardless of the alignment of the ankle, it is recommended to perform the trunk forward lean exercise using a sling in thoracic kyphosis.