• Journal of Mechanical Science and Technology
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• 제18권4호
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• pp.649-663
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• 2004

While a great number of studies on human motor control have provided a wide variety of viewpoints concerning the strategy of the central nervous system (CNS) in controlling limb movement, none were able to reveal the exact methods how the movement command from CNS is mapped onto the neuromuscular activity. As a preliminary study of human-machine interface design, the characteristics of human leg motion and its underlying motor control scheme are studied through experiments and simulations in this paper. The findings in this study suggest a simple open-loop motor control scheme in leg motion. As a possible candidate, an equilibrium point control model appears consistent in recreating the experimental data in numerical simulations. Based on the general leg motion analysis, the braking motion by the driver's leg is modeled.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.1300-1303
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• 1996

In this paper a typical problem is examined that a light, general aviation airplane, such as Cessna or Navion, in gliding turn flight shows helical-dive phenomenon when pilots try to stop the descent by using elevator only. It is known from pilot's experience that in a certain flight trim it is impossible to recover from helical-dive by using elevator only. From this study it is shown that helical-dive phenomenon is involved with longitudinal/lateral dynamics coupling to airplane's aerodynamics. Also this phenomenon consists of three parts of flight dynamics; first of all, fast longitudinal motion occurs, then is followed by a little slow lateral motion, and finally logitudinal/lateral coupled motion is fully developed.

• International journal of advanced smart convergence
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• 제5권2호
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• pp.66-72
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• 2016

With the growing shift from traditional educational approaches and studying to the more digital classroom, using electronic textbooks and digital native's demand, there is a growing need to develop new methods for learn Kanji characters for children. The purpose of this study is to help children learn the basic Kanji by using stop motion and block methods, and approaching the basic Kanji character education with a more innovative and interactive smart phone APP. In the development of this smart phone App for children's Kanji character education proposed in this study, 100 basic Kanji characters for children are selected. These 100 characters are required for the stop motion animation production, where each selected Kanji is created as a stop-motion animation utilizing a variety of techniques, such as storytelling, to better engage children. The intelligent App is designed with image recognition technology, so that in the learning process children take a picture for the assembled block using their smart phone, the APP then recognizes whether it is assembled correctly, and then plays an animation corresponding to the assembled Kanji character.

• 국제물리치료학회지
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• 제8권1호
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• pp.1071-1076
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• 2017

The purpose of this study was to determine if a gentle form of manual lumbar traction could reduce painful lumbar motions associated with lumbar disc degeneration (LDD). This clinical trial incorporated 134 participants with painful active lumbar motion. Participants were randomly assigned to an experimental treatment or sham group. 67 participants received sidelying manual lumbar traction while the other 67 participants received a sham treatment. Pre and post treatment NPRS values for the painful active lumbar motion were recorded for each group. There was a statistically significant improvement (P=0.00) for decreased pain intensity during active lumbar motion in the experimental group as compared to the sham treatment group. The average percent decrease in numeric pain rating scale (NPRS) values was 52.1% for the experimental treatment group and 8.1% for the sham group. The results of the study suggest that side-lying manual lumbar traction can improve painful lumbar motion in patients with LDD.

• 한국게임학회 논문지
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• 제16권4호
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• pp.97-104
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• 2016

이 연구는 단편 애니메이션 'Drip'을 통해 키 프레임 애니메이션과 모션 캡처 애니메이션을 융합하여 애니메이션 제작을 실현하는 기법을 제안한다. 상호 유기적 연결을 통해 효율적인 프로세스 관리가 가능할 뿐만 아니라 키 프레임 애니메이션과 모션 캡처 애니메이션의 단점을 서로 보완하는 과정을 처리함으로써 제작 기간을 단축 시켰다. 이를 통해 키 프레임 애니메이션과 모션 캡처 애니메이션의 한계를 극복하고 복합적인 프로세스를 인지하고 응용하여 효율적인 애니메이션 제작에 도움이 되고자 한다.

• Structural Engineering and Mechanics
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• 제40권6호
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• pp.829-845
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• 2011

This paper evaluates the effects of topographical and geotechnical irregularities on the dynamic response of the 2-D soil-structure systems under ground motion by coupling finite and infinite elements. A numerical procedure is employed, and a parametric study is carried out for single-faced slope topographies. It is concluded that topographic conditions may have important effects on the ground motion along the slope. The geotechnical properties of the soil will also have significantly amplified effects on the whole system motion, which cannot be neglected for design purposes. So, dynamic response of a soil-structure systems are primarily affected by surface shapes and geotechnical properties of the soil. Location of the structure is another parameter affecting the whole system response.

• 한국항해학회지
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• 제18권4호
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• pp.11-21
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• 1994

Final aim of this paper is a study on simulation of automatic steering of a ship in random seas. In order to achieve this aim, we need excitation due to random seas. The excitation may be estimated from energy spectrum of irregular waves and response functions of manoeuvring motion of a ship in regular waves. This paper deals with response functions of manoeuvring motion of a ship in regular waves. We discussed New Strip Method(NSM) of sway-yaw-roll coupled motions in regular waves. NSM is defined in space axes system and that has been used to predict seakeeping performance of a ship in waves. But ship manoeuvring is defined in body fixed axes system. So we cannot use NSM theory itself in predicting manoeuvring performance of a ship in waves. We introduced relationship between space axes system and body fixed axes system. And we developed modified NSM which was defined in body fixed axes system and was able to be used in manoeuvring motion of a ship in waves. We calculated sway and yaw response functions of manoeuvring motion of a bulk carrier in regular waves.

• International journal of advanced smart convergence
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• 제8권2호
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• pp.116-125
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• 2019

The fire should extinguish as soon as possible because it causes economic loss and loses precious life. In this study, we propose a new atypical fire and smoke detection algorithm using deep learning and color histogram of fire and smoke. First, input frame images obtain from the ONVIF surveillance camera mounted in factory search motion candidate frame by motion detection algorithm and mean square error (MSE). Second deep learning (Faster R-CNN) is used to extract the fire and smoke candidate area of motion frame. Third, we apply a novel algorithm to detect the fire and smoke using color histogram algorithm with local area motion, similarity, and MSE. In this study, we developed a novel fire and smoke detection algorithm applied the local motion and color histogram method. Experimental results show that the surveillance camera with the proposed algorithm showed good fire and smoke detection results with very few false positives.

• 국제물리치료학회지
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• 제9권3호
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• pp.1517-1520
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• 2018

It has been reported that gastrocnemius tightness and posterior talar glide are crucial factors influencing ankle dorsiflexion. However, the relationship of ankle dorsiflexion and these factors is not identified in previous studies. The purpose of this study was to identify the relationship of ankle dorsiflexion passive range of motion and gastrocnemius tightness and posterior talar glide. Twenty-five male subjects participated in this study. Bilateral weight-bearing ankle dorsiflexion passive range of motion and amount posterior talar glide of participants were measured using an inclinometer. Change in myotendinous junction of medial gastrocnemius was measured using ultrasonography to identify gastrocnemius tightness. Pearson product moment correlations were performed to examine correlations between ankle dorsiflexion passive range of motion and gastrocnemius tightness and posterior talar glide. Present findings revealed significant correlation between ankle dorsiflexion passive range of motion and gastrocnemius tightness (p=0.017, r=0.336). Also, ankle dorsiflexion passive range of motion was correlated with posterior talar glide (p=0.001, r=0.470). The present findings provide experimental evidence for factors influencing weight-bearing ankle dorsiflexion.

• 디자인융복합연구
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• 제15권6호
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• pp.243-253
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• 2016

이 연구는 하지에 장애가 있는 사람들의 보행 보조기기인 목발과 목발을 이용한 보행에 관한 것으로 인간의 보행특성에 적합한 합리적인 목발 개발을 위한 장기 연구의 일부분이다. 연구에서는 선행연구에서 개발된 목발디자인의 가이드라인을 활용하여 현재 널리 사용되고 있는 3종의 겨드랑이 목발을 비교 평가 하였다. 목발 사용 경험이 없는 성인 남녀 31명이 참가한 목발의 비교 평가 실험에서는 선행 연구에서 도출된 10가지의 목발 디자인 가이드라인으로 겨드랑이 목발 3종에 대하여 각각 평가하였다. 실험 결과, 각 목발에 대한 가이드라인별 사용자 평가의 전체 평균에서 Mobilegs-ultra와 In-motion Pro는 KM Crutch에 비해 현저하게 높게 나타났다. 하지만 Mobilegs-ultra와 In-motion Pro 사이에는 유의미한 차이를 보이지 않았다. 가이드라인별로 보면, 6가지의 가이드라인에 대하여 Mobilegs-ultra와 In-motion Pro는 KM Crutch보다 월등히 높게 나타났으며, 목발의 경량성과 경제성 및 시장성에 대해서는 세 목발 사이에 통계적으로 유의미한 차이를 보이지 않았다. 목발디자인 가이드라인에 대한 기존 목발의 사용자 인식수준을 규명하고자 한 이 연구의 결과는 후속연구인 목발을 이용한 보행평가실험의 결과와 종합적으로 분석되어 가이드라인이 합리적인지 평가하는 기초자료로 활용될 것으로 기대한다.