• Microbiology and Biotechnology Letters
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• v.30 no.3
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• pp.199-205
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• 2002

Gliding motility is defined as the movement of nonflagellated cells in the direction of its long axis on a solid surface and found in many phylogenetically diverse bacteria. Genetic, biochemical, ultrastructural, and behavioral studies have provided a wealth of information related to the mechanism of possible gliding apparatuses. Social motility of Myxococcus xanthus and the gliding of Synechocystis appear to rely on the function of type IV pili, similar to twitching motility of pseudomonas aeruginosa and Neisseria gonorrhoeae. In contrast, adventurous motility of M. xanthus and the gliding of filamentous cyanobacteria and Flavobacterium are not dependent on the pili. Instead, they appear to employ novel motility mechanisms that are currently being unveiled.

• KSBB Journal
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• v.24 no.1
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• pp.9-16
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• 2009

Chemotaxis is the movement of an organism toward chemical attractant and away from chemical repellents. Several bacteria are known to cometabolically degrade some pollutants and attracted to the pollutants. The chemotactic responses to these compounds influence the efficiency of bioremediation because the first precondition of pollutant degradation is definitely confrontation between microorganisms and pollutants. In this review, we summarize present knowledge of about the chemotactic mechanism to environmental pollutants of Pseudomonas species.

• Archives of design research
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• v.19 no.5 s.67
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• pp.129-138
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• 2006

It is expected that the typical lifestyle of the future will be transformed into an opulent and comfortable existence as the quality of life improves due to the increase in household income and reduction in working hours. In the meantime, as the standard of living becomes increasingly more comfortable and plentiful, the toll on physical health becomes magnified as a result of obesity and insufficient exercise caused by super nutrition and change in labor conditions (from physical labor to mental labor). This has instigated a deep awareness in fitness on the part of many people, forcing them to recognize the significance of daily exercise and physical activity. The high annual growth rate in the fitness and athletic apparatus market, which is more than 20%, is attributed to this phenomenon. The Elliptical Cross Trainer(ECT), which has drawn wide attention recently, is a non-impact athletic apparatus that not only promotes exercise of the upper body parts in such sports as skiing but also the exercise of lower parts of the body on a treadmill. It is a type of cross training athletic gear that has been developed for aerobic exercise throughout the entire body. It has already formed a market as big as that of the treadmill in Europe, America, etc. Recently, its demand is growing sharply in the Korean markets as well as those in Northeast Asian countries, Despite such demand increase and expansion, since most of the expensive ECTs are exclusively supplied by suppliers in only a few advanced countries, localization of the ECT is urgently required in order to enhance competitiveness of Korean manufacturers and to expand the market. This paper introduces the process and results of a design-engineering cooperative study that was peformed for the development of the ECT.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
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• v.7 no.1
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• pp.87-106
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• 2001

슬링 운동 치료(Sling Exercise Therapy)는 근골격계 질환 환자의 영구적인 치유를 목적으로 슬링을 이용한 능동적인 치료와 운동법을 체계화한 접근법이다. 이 개념은 10 여년 전부터 노르웨이의 물리치료사들을 중심으로 발전되어 왔으며, 현재 뇌졸중 환자와 신경학적 질환자 그리고 소아 환자와 건강 증진 프로그램에서도 이용되는 방법들이 개발되어지고 있다. 현재 정형물리치료 분야에 대한 세계적인 흐름은 전기치료 기구나 물리치료사의 손에 의해 수동적으로 이루어지는 치료 접근에서 점차 환자가 스스로 물리치료사에 의해 특별히 고안된 운동방법에 따라 능동적인 치료적 운동을 통해 손상 치료와 건강 관리를 하는 방향으로 발전되어지고 있으면 많은 치료 분야에서 이러한 접근법을 채택하고 있다. 슬링운동치료 개념은 이러한 능동적인 운동법을 주된 목적으로 이용하고 있다. 이 논문은 근골격계 질환의 치료를 중심으로 쓰여졌다. SET 개념에는 체계적인 진단과 치료의 요소들이 포함되어져 있다. 진단 체계에는 열린 사슬과 닫힌 사슬을 이용하여 단계적으로 부하를 가해 줌으로서 근육의 상태를 검사하는 방식을 가지고 있다. 치료적 체계를 구성하는 요소에는 근육의 안정화, 감각운동 훈련, 열린 사슬과 닫힌 사슬을 이용한 훈련법, 가동성있는 연부 조직의 역동적 훈련, 심폐 강화 훈련, 단체 훈련, 가정에서의 개별적 훈련과 추후 관리 그리고 운동 프로그램을 제공하기 위한 컴퓨터 소프트웨어가 포함되어 있다.

• Journal of the Korea Convergence Society
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• v.11 no.8
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• pp.147-152
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• 2020

The purpose of this study was to develop an auxiliary device useful for promoting continued participation in the golf among young golfers and female beginner-level golfers who were gradually increasing in number but often losing interest in the golf and gave up playing golf due to difficulty with posture, boredom from golf itself, slow improvement of skill, etc., in the process of learning the golf. For that, a hardware device fitted with various sensors was attached to the lower part of golf club grip to develop a platform capable of collecting and transmitting the data on each golfer's swing posture, driving distance, etc. If a smartphone app, which can analyze and store those data, is developed and synchronized, each golfer's postures can be identified and golfers can correct the posture on their own. Moreover, the smartphone app provides the contents for self-comparison and comparison with others and will be able to infuse the beginner-level golfers with internal motivation for continued participation in the golfing exercise if the game-type elements are added.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.7
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• pp.2878-2885
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• 2012

In this study, the training and sporting equipment for leg rehabilitation featuring the MR fluids is proposed. The compact MR fluid brake is designed and manufactured to apply to the rehabilitation training and sporting mechanism. The resistance characteristic of the MR fluid brake is controllable by varying the magnetic field around the fluid. Under consideration of spatial limitation, design parameters which are related with the magnetic strength are determined to maximize to a torque using finite element method. The FE analysis is performed using a commercial code, ANSYS Workbench. The proposed brake device is manufactured, and its field-dependant torque is experimentally evaluated. When the electric current is supplied, the torque of the MR fluid brake is increased and the response is very fast. Depending on the strength of the current supply, torques of the MR fluid brake also increase similar to Bingham property of MR fluid.

• The Journal of Korean Institute for Practical Engineering Education
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• v.2 no.2
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• pp.42-48
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• 2010

For a basic engineering education Problem-Based Learning (PBL) method was adopted in order to pursuit the learner acquisition of critical knowledge, problem solving proficiency, and self-directed learning strategies by measurements of various physical and biological units, by calculation of errors in experimental data, by leraning energy conservation law and equation of motion, and, by analysis ability on data patterns through Elliptical Trainer(ET) exercise. The results show the ET may be a good experimental tool for understanding the PBL method. A sample syllabus was provided for one semester use, and by use of data obtained by self-directed and creative learning, the results of three groups for the PBL problems proposed by using ET were (1) the slope of angle was 23.5o in the diagram of energy exhaustion against velocity (GROUP A), (2) the angle range between the maximal and minimal energy exhaustion against weight loss was 15.0o ~ 26.5o (GROUP B), and finally (3) the angle was varied by 51.0o in the diagram of weight loss against distance (GROUP C).

• Proceedings of the Korean Society of Computer Information Conference
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• 2012.07a
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• pp.69-70
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• 2012

NFC(Near Field Communication)는 전자태그의 하나로 13.56Mz 주파수 대역을 사용하는 비접촉식 근거리 무선통신 모듈로 10cm의 가까운 거리에서 단말기 간 데이터를 전송하는 기술을 말한다. 본 논문에서는 헬스장을 이용하는 사용자의 운동에 도움을 줄 수 있는 NFC기반 스마트폰 애플리케이션의 개발내용에 대해 기술한다. 본 애플리케이션을 통해 NFC 탑재 디바이스를 가진 사용자는 헬스장을 이용할 때 단순 태그인식만으로 출석을 확인할 수 있고, 운동기구의 자세한 사용방법을 멀티미디어의 형태로 제공받을 수 있다. 또한 운동일지와 식단일지를 기록하고 이를 트레이너와 공유하게 함으로써 보다 체계적으로 운동을 꾸준히 할 수 있게 도움을 준다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2023.07a
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• pp.87-88
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• 2023

본 논문에서는 COVID-19 팬데믹으로 인해 사회적 거리두기 및 규제조치가 시행되면서 다양한 분야에서 큰 영향을 가져왔다. 변화된 홈트레이닝 분야는 운동기구를 구비하여 개인운동을 통해 건강을 유지하고 있으나 전문적인 교육을 받지 않은 홈트레닝으로 부상 위험에 노출 되고 있다. 요가는 호흡운동과 명상을 지향하는 운동으로 요가의 효과를 얻기 위해 올바른 움직임과 자세가 중요 하다. 본 논문에서는 실시간으로 입력된 영상 프레임을 OpenCV와 MediaPipe를 통해 추출된 주요좌표 값을 벡터 내적공식을 대입, 코사인2법칙을 통해 요가의 올바른 자세를 분석하여 종합적인 정보를 제공하는 요가교정 모델이다.

• The Journal of the Korea Contents Association
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• v.10 no.9
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• pp.285-292
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• 2010

The purpose of this study is to investigate the effect of 8 direction incline and rotation exercise on pain and dynamic balance in the patients with chronic low back pain(CLBP). 20 patients who were diagnosed with CLBP were included for the study. 10 patients(experimental group) were treated by modality{Hot Pack(H/P), Transcutaneous Electric Nerve Stimulation(TENS), Ultra Sound(U/S)} and then performed 8 direction incline and rotation exercise. The other 10 patients(control group) were only treated by modality. The therapeutic intervention was taken three times a week for 6 weeks. Dynamic balance was assessed by Star Excursion Balance Test(SEBT) and pain was assessed by Visual Analog Scale(VAS). VAS scores of both groups were decreased. However, the experimental group was more significantly decreased than the control group. The dynamic balance of both groups was significantly increased in anterior, posterior, medial, lateral direction. But experimental group was more significantly increased than the control group. In conclusion, 8 direction incline and rotation exercise was effective on pain and dynamic balance in CLPB.