• PNF and Movement
• /
• 제22권1호
• /
• pp.91-99
• /
• 2024

Purpose: Backward walking has shown positive effects on gait recovery in rehabilitation patients. It is increasingly used as an aerobic training method in rehabilitation populations, inducing more sensory and motor stimulation than forward walking. Therefore, the purpose of this study is to investigate the effects of visual stimulation during backward walking. Methods: Twenty-seven healthy adults with a visual acuity of 0.8 or higher participated in the study. To compare the effects of visual stimulation during various walking conditions among healthy individuals, the participants randomly selected cards numbered one to six and walked a distance of 10 meters. Walking ability was measured using Optogait. Results: Statistically significant differences were observed in speed, stride, and percentages of single support and contact phase during backward walking. Within eyes-closed conditions during backward walking, significant differences were found in percentages of single support, terminal stance, and contact phase. Moreover, the percentage of terminal swing significantly differed during backward walking with head turn conditions. Conclusion: Gait parameters such as speed, stride, and percentages of single support and contact phase were higher during backward walking than forward walking. These results indicate that backward walking involves multiple sensory systems and varying conditions.

• 한국콘텐츠학회논문지
• /
• 제12권9호
• /
• pp.325-340
• /
• 2012

본 연구는 정부의 창업보육기업의 기술사업화지원을 통해 창업보육기업이 기술역량에 따른 정부의 지원이 필요한 단계를 조사하였고, 경영성과 단계에 지원조건이 필요한지를 조사하였다. 정부의 기술사업화 지원이 창업보육기업의 지원의 필요단계와 경영성과단계에 필요한 기술역량을 제시함으로써, 창업을 단계를 활성화시키고 지원하는 단계의 효율적 방안을 제시하는데 있다. 즉, 창업보육기업이 필요한 지원단계를 찾아내고 정부지원을 통해 기술 또는 제품개발은 물론 개발된 기술을 사업화시키거나 수익원천을 확보토록 하는데 도움을 주는데 본 취지가 있다. 창업보육기업의 정부지원이 필요한 지원단계 찾아 기술사업에 단계별 필요한 지원을 조사하는 것을 목적으로 한다. 본 연구는 창업보육중소기업의 "기술개발사업화 지원"을 통해 창업중소기업의 정부의 지원단계를 조사하고, 창업보육기업을 활성화하는데 목표가 있다. 본 연구는 창업보육중소기업의 "기술개발사업화지원"을 하는데 있어서 창업보육기업의 활성화에 따른 정부의 지원단계와 경영성과단계에 효율적 지원단계을 제시함에 있다. 본 연구는 창업보육기업의 기술개발 단계인 기초, 응용, 개발기술단계에서 정부의 지원이 필요한 단계를 조사하였으며, 경영성과 단계의 대출증대, 수출증대, 수입대체, 원가절감, 고용증대, 공정개선에 기술역략이 필요한 단계를 체계적으로 분석하였다. 따라서 정부의 지원이 가장 필요한 단계은 수행과정인 것으로 나타났으며, 경영성과단계에서 지원조건은 필요자금지원과 자금의 지원시기와 기간이며, 사업추진 중 신청과 선정심사, 신성장동력분야와 사회기업분야로 나타났다.

• Journal of applied mathematics & informatics
• /
• 제27권5_6호
• /
• pp.1049-1059
• /
• 2009

Continuous t-norm based shape preserving additions of LR-fuzzy intervals with unbounded support is studied. The case for bounded support, which was a conjecture suggested by Mesiar in 1997, was proved by the author in 2002 and 2008. In this paper, we give a necessary and sufficient conditions for a continuous t-norm T that induces DR-shape preserving addition of LR-fuzzy intervals with unbounded support. Some of the results can be deduced from the results given in the paper of Mesiar in 1997. But, we give direct proofs of the results.

• 가정과삶의질연구
• /
• 제31권4호
• /
• pp.83-96
• /
• 2013

This study aims to suggest the alternative policies and practices which policy makers can introduce and enlarge for work-family balance of employees. For purpose, this study analyzed the regulation of work time and parental leave benefits of employees. And the results of major projects in family friendly support services were examined. Based on these assessment, this study suggested various flexible work arrangements, papa's quota system in parental leaves, various family leaves for family care, establishment of FFSC in every metropolitan area, diversification of consulting project, and enlarging of certification project on family friendly workplace.

• The Journal of Korean Physical Therapy
• /
• 제22권5호
• /
• pp.57-61
• /
• 2010

Purpose: The purpose of this study was to identify the effect of active foot arch support on the muscles of lower extremity electromyographic activity during squat exercise in persons with pronated foot. Methods: The study subjects were 16 persons with pronated foot. They have no history of surgery in lower extremity and trunk and limitation of range of motion or pain when performing squat exercise. Each subject was measured the navicular drop (ND) to determine the pronated foot. And then the subjects were asked to perform three repetitions of a $90^{\circ}$ knee flexion squat in both conditions which are 1) preferred squat and 2) squat with active foot arch support. Results: Paired t-test revealed that squat with active foot arch support produced significantly greater EMG activities in abductor hallucis (p=0.00), proneus longus (p=0.03) and gluteus medius (p=0.04) than preferred squat. But the EMG activities of tibialis anterior, vastus medialis oblique and vastus lateralis were not showed significantly different between the both squat conditions. Conclusion: The findings of this study suggest that active foot arch support during squat increase the activities of lower extremity muscles which are the abductor hallucis, proneus longus and gluteus medius. Also, the abductor hallucis which is one of the planter intrinsic muscle and peroneus longus play a role in support of the foot arch and active foot arch support induced the increase of the activity of gluteus medius. Therefore active foot arch support can change the lower extremity biomechanics as well as passive foot support such as foot orthotics and taping.

• 대한조선학회논문집
• /
• 제42권5호
• /
• pp.479-486
• /
• 2005

The final goal of shift alignment design is that the bearing reaction forces or mean pressures are within design boundaries for various service conditions of a ship. However, it is found that calculated bearing load can be substantially variable according to the locations of the effective support points of after sterntube bearing which are determined by simple calculation or assumption suggested by classification societies. A new analysis method for shaft alignment calculation is introduced in order to resolve these problems. Key concept of the new method is featured by adopting both nonlinear elastic and multi-support elements to simulate a bearing support Hertz contact theory is basically applied for nonlinear elastic stiffness calculation instead of the projected area method suggested by most of classification societies. Three loading conditions according to the bearing offset and the hydrodynamic moment and twelve models according to the locations of the effective support points of sterntube bearings are prepared to carry out quantitative verifications for an actual shafting system of 8000 TEU class container vessel. It is found that there is relatively large difference between assumed and calculated effective support points.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2011년도 춘계학술대회 논문집
• /
• pp.690-696
• /
• 2011

A number of conventional railway bridge is more than 2600. Non-ballast plate girder bridge is about 700 and this is 27% of all bridge numbers. Non-ballast plate girder has advantages that self load is more lighter than moving load and construction cost is more inexpensive than concrete bridge. But non-ballast plate girder has disadvantages that vibration and noise is bigger than concrete bridge. This study had analyzed behavior of non-ballast plate girder according to the arrangement of supports and driving conditions to review the proper arrangement of support. Measurements were performed in single line and disel locomotive of 7400type were used as test vehicle. The vehicle's driving conditions are as follows; Change of driving direction, Constant speed driving, Deceleration driving, Acceleration driving. Main measurement contents were horizontal displacement and vertical vibration acceleration in girder of vicinity support. Results of measurement are as follows; In case that a vehicle drives from fixed support to movable support, vertical vibration acceleration of the girder was smaller than opposition case.

• 한국해양공학회지
• /
• 제24권1호
• /
• pp.153-160
• /
• 2010

This paper deals with the topology optimized design of the riser support structures for floating production storage and offloading units (FPSOs) under global and local loading conditions. For a preliminary study and validation of the numerical approach, a simplified plate under static loading is first evaluated with the representative topology optimization methods, the Homogenization Design Method (HDM) and Density Method (DM) or Simple Isotropic Material with Penalization (SIMP). In the context of the corresponding riser support structures, the design problem is formulated such that structure shapes based on design domain variables are determined by minimizing the compliance subject to a mass target, considering the stress criterion. An initial design model is generated based on an actual FPSO riser support configuration. The topology optimization results present improved design performances under various loading conditions, while staying within the allowable limit of the offshore area.

• 한국해양공학회지
• /
• 제24권1호
• /
• pp.20-33
• /
• 2010

The paper deals with strength design of a riser support installed on floating production storage and offloading (FPSO) vessel under various loading conditions - operation, extreme, damaged, one line failure case (OLFC) and installation. The design problem is formulated such that thickness sizing variables are determined by minimizing the weight of a riser support structure subject to stresses constraints. The initial design model is generated based on an actual FPSO riser support specification. The finite element analysis (FEA) is conducted using MSC/NASTRAN, and optimal solutions are obtained via moving least squares method (MLSM) in the context of response surface based approximate optimization. For the meta-modeling of inequality constraint functions of stresses, a constraint-feasible moving least squares method (CF-MLSM) is used in the present study. The method of CF-MLSM, compared to a conventional MLSM, has been shown to ensure the constraint feasibility in a case where the approximate optimization process is employed. The optimization results present improved design performances under various riser operating conditions.

• Journal of Advanced Research in Ocean Engineering
• /
• 제4권2호
• /
• pp.47-52
• /
• 2018

The Korea Offshore Wind Power (KOWP) is planning to construct offshore wind energy farms with an overall rated power of 2.5 GW in the south-western coast of the country until 2019. Various types of support structures for offshore wind turbines have been proposed in the past. Nevertheless, in South Korea, jacket structures have in general, been applied as support structures for offshore wind turbines owing to the many accumulated experiences and know-how regarding this kind of support structure. The choice of offshore structure is mainly influenced by site conditions such as seabed soil type and sea environment during installation. In installing jacket sets on the seabed, the mudmat is necessary to maintain the equilibrium of the jacket without the aid of additional devices. Hence, this study proposes the installation of skirt plates underneath the bottom frame of jackets in order to improve the installation stability of jacket structures under rougher sea conditions. To confirm the effect of skirt plates, installation stability analyses considering overturning, sliding and bearing capacity have been performed. From the results, it is shown that jacket structures with skirt plates can contribute to improving the sliding stability of the structures of new wind power farms, while providing economic benefits.