• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.220-223
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• 2015

기존의 제품에서는 음악을 들으며 운동하는 과정에서 음악속도에 맞게 운동을 하는 방법을 사용하였다. 사용자가 운동중에 직접 음악 재생을 조절하는 방법은 좀 더 격한 음악을 재생하고자 했을 때 음악을 검색중 사용자의 운동의 흐름이 끊어지는 경우가 빈번하게 발생한다. 그러나 사용자의 걸음 속도를 이용해 음악 재생속도를 더 빠르게 한다면 효율적인 운동이 될 것이다. 본 논문에서는 신발의 깔창에 장착된 1개 이상의 압전센서를 활용하여 아두이노에서 걸음 수를 수집하고 수집된 압전센서 데이터를 이용하여 걸음 수를 이용한 걸음 속도의 측정 과정을 안드로이드 스마트폰에서 처리한다. 이렇게 측정된 걸음 속도를 통해 안드로이드 스마트폰에서 음악 재생 속도를 결정하여 사용자에게 쾌적한 운동 환경을 제공하는 것을 목적으로 한다.

• Physical Therapy Korea
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• v.5 no.4
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• pp.30-40
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• 1998

이 연구의 목적은 젊은 아시아인과 코카시아 여성의 보행패턴 중 보폭시간(step time) 과 보폭 (step length)을 비교하고 두 집단의 골반넓이와 보폭과 상관관계가 있는지 알아보는 것이다. 연구대상자는 15명의 아시아인과 15명의 코카시아 여성이었으며 나이는 23세에서 35세 범위에 있었다. 보행분석을 위해서는 GAITRite System을 사용하였으며 분석방법으로는 인종(아시아인대 코카시아인)과 신체부위(좌측, 우측)를 요인으로 하여 반복측정에 의한 분산분석을 하였다. 아시아인 여성보다 코카시아인 여성의 보폭, 다리길이, 골반 넓이가 통계학적으로 유의하게 높았고 왼쪽 다리의 걸음과 오른쪽 다리의 걸음에 있어서는 통계학적으로 유의한 차이가 없었다. 그리고 보폭시간, 속도, 걸음수(cadence)에 있어서도 두 여성 인종간에 통계학적으로 유의한 차이가 없었다. 이러한 결과는 보행변수 중에서 걸음수나 속도와 같은 시간변수에 았어서는 아시아인 여성과 코카시아인 여성간에 차이가 없음을 의미한다.

• Journal of the Korean Institute of Intelligent Systems
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• v.18 no.4
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• pp.555-561
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• 2008

This Paper introduces new approach to develop fast and reliable gaits for quadruped robot using GA(genetic algorithm). Planning gaits for legged robots is a challenging task that requires optimizing parameters in a highly irregular and multidimensional space. Recent approaches have problems to select proper parameters which are not known in advance and optimize more than ten to twenty parameters simultaneously. In our approach, the effects of major gait parameters are analysed and used to guide the search more efficiently. The experiments of Sony AIBO ERS-7 in Webots environment indicate that our approach is able to produce much improved results in fast velocity and reliability.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.309-312
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• 2003

Though a legged robot has high terrain adaptability as compared with a wheeled vehicle, its moving speed is considerably low in general. For attaining a high moving speed with a legged robot, a dynamically stable walking, such as running for a biped robot and a trot gait or a bound gait for a quadruped robot, is a promising solution. However, energy efficiency of a dynamically stable walking is generally lower than the efficiency of a stable gait such as a crawl gait. In this paper, we present an experimental study on the energy efficiency of a quadruped walking vehicle. Energy consumption of two walking patterns for a trot gait is investigated though experiments using a TITAN-VIII.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.11
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• pp.2697-2702
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• 2015

In the existing studies providing a method which do exercise according to music speed, the method was used which a user changes playing musics. However, if the method which a user changes directly playing musics is used, flow of exercise can be discontinued during searching musics when anyone want to play a fast music. In this paper, we designed the module which measures the number of steps from a user of wearable smart shoes based on the Arduino, and implemented the module so that the number of steps can be measured correctly by sending data to smart phone based on Android. And it is possible to measure moving distance and pace speed by utilizing a GPS in order to get the more accurate momentum. Also, we can measure more accurate calorie consumption than existing products by measuring the mean value of the calorie consumption for moving distance and the calorie consumption for the number of steps, give motivation of exercise by applying an algorithm of changing music genre according to pace speed, and increase the exercise effect at the same time.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.6
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• pp.1247-1252
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• 2005

Though a legged robot has a high terrain adaptability as compared with a wheeled robot, its moving speed is considerably low in general. For attaining a high moving speed with a logged robot, a dynamically stable walking is a promising solution. However, the energy efficiency of a dynamically stable walking is generally lower than the efficiency of a stable gait such as a crawl gait. In this paper, energy consumption of two walking patterns for a trot gait is simulated through modeling a quadruped walking robot named TITAN-VIII.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.42 no.3 s.303
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• pp.23-30
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• 2005

As a human identification technique, gait recognition has recently gained significant attention. Silhouette-based gait recognition is one of the most popular methods. This paper aims to investigate features that determine the style of walking in silhouette-based gait recognition. Gait can be represented using two cues: static(shape) cue and dynamic(motion) cue. Most recently, research results have been reported in the literature that the characteristics of gait are mainly determined by static cue but not affected by dynamic cue. Unlike this, experimental results in this paper verifies that dynamic cue is as important as and in many cases more important than static cue. For experiments, we use two well-blown gait databases: UBC DB and Southampton Small DB. The images of UBC DB correspond to the 'ordinary' style of walking. The images of Southampton Small DB correspond to the 'disguised' (not ordinary by wearing special clothes or bags) style of walking. As results of experiments, the recognition rate was 100% by static cue and $95.2\%$ by dynamic cue for the images of UBC DB. For the images of Southampton Small DB, the recognition rate was $50.0\%$ by static cue and $55.8\%$ by dynamic cue. The risk against correct recognition was 0.91 by static cue and 0.97 by dynamic cue for the images of UBC DB. For the images of Southampton Small DB, the risk was 0.98 by static cue and 0.98 by dynamic cue. Consequently, the characteristics of ordinary gait are mainly determined by static cue but that of disguised gait by dynamic cue.

• 건강소식
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• v.2 no.10 s.13
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• pp.4-6
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• 1974

세상은 급속도로 변하고 있다. 어리둥절할 지경이다. 문명이 발달한 나라일수록 변화는 심하다. 그러나 그 심한 변화 속에서 세계의 인류는 용케도 살아간다. 그런데 우리는 어떨까. 우리의 생활 주변에는 어리둥절하고 제자리걸음 하는 일은 없을가. 고쳐야 할 버릇, 고쳐야 할 생각은 없을가.

• Journal of the Korean Institute of Intelligent Systems
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• v.19 no.4
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• pp.457-463
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• 2009

In this paper, a novel foot force distribution algorithm for hexapod walking robots is presented. The considered hexapod robot has fault-tolerant tripod gaits with a failed leg in locked-joint failure. The principle of the proposed algorithm is to minimize the slippage of the leg that determines the stability margin of the fault-tolerant gaits. The fault-tolerant tripod gait has a drawback that it has less stability margin than normal gaits. Considering this drawback, we use the feature that there are always three supporting legs, and by incorporating the theory of Zero-Interaction Force, we calculate the foot forces analytically without resort to any optimization technique. In a case study, the proposed algorithm is compared with a conventional foot force distribution method and its applicability is demonstrated.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.176-178
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• 2016

본 논문은 손목에 착용한 3축 가속도계 신호로부터 걷기, 달리기 상태일 때 걸음 수를 검출하는 방법을 제안한다. 성인 남자 4명의 피 실험자를 대상으로 트레드밀에서 2km/h, 4km/h, 6km/h, 8km/h의 속도로 신호를 수집하였다. 3축 가속도 신호에서 SMV를 계산한 후 Moving Max를 적용한 후 Vally Detection을 하여 걸음 수를 검출하였다. 약 2300보의 수집 신호에서 약 97.77%의 인식 결과를 도출하였다.