• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.792-795
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• 2007

To quantify irregular body motions the time series analysis was applied to the gait study. The motions obtained from gait experiment are complex to exhibit nonlinear behaviors. The purpose of this study is to measure quantitatively the characteristics of the major six joints of the body during walking. The gait experiments were carried out for eighteen young males walking on a motor driven treadmill. Joint motions were captured using eight video cameras, and then three dimensional kinematics of the neck and the upper and lower extremities were computed by KWON 3D motion analysis software. The largest Lyapunov exponent was calculated from the time series to quantify stabilities of each joint. The results provides a data set of nonlinear dynamic characteristics for six joints engaged in normal walking.

• 대한기계학회논문집A
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• 제31권8호
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• pp.889-895
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• 2007

Quantifying dynamic stability is important to assessment of falling risk or functional recovery for leg injured people. Human locomotion is complex and known to exhibit nonlinear dynamical behaviors. The purpose of this study is to quantify major joints of the body using chaos analysis during walking. Time series of the chaotic signals show how gait patterns change over time. The gait experiments were carried out for ten young males walking on a motorized treadmill. Joint motions were captured using eight video cameras, and then three dimensional kinematics of the neck and the upper and lower extremities were computed by KWON 3D motion analysis software. The correlation dimension and the largest Lyapunov exponent were calculated from the time series to quantify stabilities of the joints. This study presents a data set of nonlinear dynamic characteristics for eleven joints engaged in normal level walking.

• Journal of Preventive Medicine and Public Health
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• 제47권2호
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• pp.113-123
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• 2014

Objectives: Several previous studies have found that healthy behaviors substantially reduce non-communicable disease incidence and mortality. The present study was performed to estimate the prevalence of four modifiable healthy behaviors and a healthy lifestyle among Korean adults according to socio-demographic and regional factors. Methods: We analyzed data from 199 400 Korean adults aged 19 years and older who participated in the 2010 Korean Community Health Survey. We defined a healthy lifestyle as a combination of four modifiable healthy behaviors: non-smoking, moderate alcohol consumption, regular walking, and a healthy weight. We calculated the prevalence rates and odds ratios of each healthy behavior and healthy lifestyle according to socio-demographic and regional characteristics. Results: The prevalence rates were as follows: non-smoking, 75.0% (53.7% in men, 96.6% in women); moderate alcohol consumption, 88.2% (79.7% in men, 96.9% in women); regular walking, 45.0% (46.2% in men, 43.8% in women); healthy weight, 77.4% (71.3% in men, 73.6% in women); and a healthy lifestyle, 25.5% (16.4% in men, 34.6% in women). The characteristics associated with a low prevalence of healthy lifestyle were male gender, younger age (19 to 44 years of age), low educational attainment, married, living in a rural area, living in the Chungcheong, Youngnam, or Gwangwon-Jeju region, and poorer self-rated health. Conclusions: Further research should be implemented to explore the explainable factors of disparities for socio-demographic and regional characteristics to engage in the healthy lifestyle among adults.

• 디지털융복합연구
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• 제19권11호
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• pp.595-606
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• 2021

본 연구는 당뇨병을 진단받은 65세 이상 노인들의 인구학적 및 질병 특성, 건강행위 실천과 질병으로 인한 응급실 내원 간의 관련성에 대해 파악하기 위한 서술적 상관연구이다. 연구대상자는 2014~2017년도의 한국의료패널 연간 데이터에 등록된 대상자 중에서 당뇨병을 진단받은 65세 이상 노인 총 956명을 대상으로 하였다. 자료 분석은 SPSS 26.0 program을 이용하여 기술통계, Mann-Whitney U test, 카이제곱 분석, 일변량 회귀분석으로 분석하였다. 연구결과 당뇨병을 진단받은 노인의 중등도 신체활동과 걷기 실천 일수가 적을수록, 연령이 높을수록, 장애로 인한 활동제한이 있을수록, 우울증이 있을수록, 동반 만성질환 수가 많을수록 응급실 내원의 위험이 증가하는 것으로 나타났다. 따라서 당뇨병을 진단받은 노인들의 응급실 내원을 감소시키기 위해 지속적인 신체활동의 실천을 적극 격려하는 것이 중요하다.

• 한국지능시스템학회논문지
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• 제21권3호
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• pp.353-358
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• 2011

본 논문에서는 이족 로봇을 위한 가상의 다리에 기반한 보행 모델을 제시한 후, 시뮬레이션을 통하여 제시한 보행 모델의 근본적인 롤/피치/요(roll/pitch/yaw) 운동 특성을 분석한다. 이를 위하여 로봇의 무게 중심과 압력 중심에서의 운동 경로를 사람의 발걸음 운동 패턴과 유사한 임의의 패턴으로 설정하고, 이러한 경로를 따라 보행할 경우에 나타나는 주요 관성 성분 특성을 확인한다. 결과적으로, 이족 보행에서 롤, 피치 및 요 방향으로의 운동은 보행과정에서 생성될 수 있는 자연스러운 현상이며, 이것은 발걸음의 간격, 무게 중심의 위치 및 로봇 몸체의 이동가속도와 밀접한 관계가 있음을 보인다. 또한, 이족보행의 밸런스 관점에서 발의 위치 설정을 위한 경로계획의 중요성을 고찰한다.

• 제어로봇시스템학회논문지
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• 제15권5호
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• pp.530-537
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• 2009

A graphic simulator can be a useful tool for planning gaits or dynamic behaviors to a walking pet robot. Microsoft describes robotics developer studio (MSRDS) as an end-to-end robotics development platform including simulation engine based on dynamics. In this paper, we propose a pet robot simulator (PRS), based on MSRDS, which supports interactively controlled two walking robots connected over network. To be pet robot simulator, modeling a commercial pet robot is performed and gait planning is also implemented. By using concurrency and coordination runtime (CCR) and decentralized software services (DSS) of MSRDS software platform, we connect two robots which are displayed together but controlled separately over network. The two walking pet robots can be simulated interactively by joysticks. It seems to be an internet game for pet robots.

• Educational Technology International
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• 제21권2호
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• pp.125-153
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• 2020

The advancement of virtual reality technology offers various locomotion options that support users' navigation behaviors in a virtual reality environment. This study was aimed at examining the effects of two navigation methods-joystick-controlling and walking-around-on users' perceived usability, behavioral engagement, and virtual presence. Fifty South Korean college students were recruited in the study, and they were assigned randomly to one of the two navigation conditions. Participants from each group were asked to observe a 3D object and complete the surveys. They were then asked to repeat the procedure with a 2D image. Using repeated-measures ANOVAs and MANOVA, we found that users using joystick-controlling reported higher usability and showed superior performance to the walking-around group on two tasks. Participants reported a higher behavioral engagement when observing the 2D image. Besides, they perceived a significantly higher virtual presence when observing the 2D image. Finally, we discussed the implications of the findings for the navigation method design.

• 대한간호학회지
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• 제50권2호
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• pp.242-254
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• 2020

Purpose: The purpose of this study was to examine the effects of smart-phone app-based walking exercise programs for taxi drivers on self-efficacy and outcome expectations for exercise, health-related quality of life, walking as an exercise, and physiological indexes. Methods: A nonequivalent control group with a pre-post-test design was used. The subjects were recruited in G metropolitan city. Subjects were assigned to the experimental (n=31) or control groups (n=30). The smart phone app-based walking exercise program consisted of educations via the app, twelve short message services, and one individual telephone counseling session, which was spread over 12 weeks. Results: Self-efficacy, outcome expectations, and health-related quality of life had significantly higher pre-post test differences in scores in the experimental group. Additionally, blood pressure, body mass index, and waist circumference had significantly decreased prepost-test difference levels in the experimental group. Walking as an exercise (which consisted of days walked, number of steps walked, and amount of time walked) had significantly increased in the experimental group after 7~12 weeks in the period following the intervention program rather than 1~6 weeks after the program. Conclusion: The smart phone app-based walking exercise program based on the self-efficacy theory demonstrates a significant effect on improving self-efficacy, outcome expectations physical activities, and health-related quality of life for taxi drivers. Therefore, it is recommended to actively use the program as a tool to promote self-efficacy, physical activities, and health behaviors in taxi drivers.

• 한국조경학회:학술대회논문집
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• 한국조경학회 2019년도 춘계학술대회 논문집
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• pp.77-78
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• 2019

• 한국산학기술학회논문지
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• 제7권2호
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• pp.246-250
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• 2006

본 연구는 지하공간에 있어서 보행자의 정보활용에 관한 연구의 일환으로. 후쿠오카시 텐진지구 지하상가를 중심으로, 보행자의 보행형태로부터 사인의 이용현황을 밝혀내는 것을 목적으로 아래와 같은 분석을 실시하였다. 1) 피험자가 통과한 Route의 체크에 의한 보행선형의 비교, 2) 피험자가 본(이용한) 사인을, 보행동선과, 사인의 이용상황, 사인의 설치장소, 사인의 높이등과의 관계에 있어서 구간별로 분석시, 동선의 Type를 분류 위의 텐진 지하상가에서의 보행특성분석의 결과로 부터, 사인에서의 배치의 문제, 안내 사인의 이용률의 부족 등 보행특성상의 문제에의 해결해야할 과제가 밝혀졌다. 그것에 대한 해결책으로, 1)사인의 배치문제에 관해서는 사인을 다양한 높이와 설치장소에 활용하여 제공할 수 있는 안내 유도정보제공의 필요성, 2)피험자의 보행특성에 나타난 문제점에 관해서는, 보행자가 보다 다양한 안내정보를 이용할 수 있도록 사인의 안내정보시스템을 활용한 보행지원과, 설치되어 있는 사인은 많지만 이용률이 적은 곳, 보행의 동선에 문제가 있던 장소와 장소를 연결하는 곳에 적절한 정보제공의 필요성을 제시하였다.