The object of this study is concerned about the optimal design of the supporting frame in a twist screen. Twist screen is widely used for grading and screening materials in the fields such as coal-selecting, mining-selecting, building materials, electrical power and chemical industry, etc. It is composed of base, supporting frame, vibrator, screen, spring, trough, clamp and etc. Especially, supporting frame in twist screen are stressed by high load, mostly it is shock-type loads. Nevertheless, design of base is dependent on experience, and it will cause reliability reduction and cost increase. The supporting plate is composed by the upper plate, the bracket and etc. This research purpose is to propose and verify a method to achieve higher product quality, lower costs, and far less physical testing. In this study, design parameters used for optimization are the upper plate thickness(8㎜, 10㎜, 12㎜) and the bracket thickness(8㎜, 10㎜, 12㎜) in the supporting frame. The result showed that base weight reduced to maximum 25.8% when compared with the current twist screen.

본 연구는 마이크로 스케일의 내부 구조를 갖는 3차원 인공지지체를 제작하기 위하여 개발된 제조 시스템의 성능 분석을 위해 x-y축 정밀 스테이지 시스템으로 조립되었을 때의 해상도 및 정확도를 측정 하였으며, z축 정밀 스테이지를 분리하여 다양한 물리적 오차를 제거하였다. 기존의 x-y-z축 정밀 스테이 지 시스템을 x-y축으로 분리하고 각 축의 이동거리를 4종류(±0.25μm, ±0.5μm, ±25μm, ±50μm)로 설정하여 각 위치마다의 변위를 레이저 측정기를 이용하여 기록하였다. 가장 작은 이동거리(±0.25μm)에서의 진동이 상대적으로 가장 크게 나타났으며, y축 스테이지 위에 x축 스테이지를 조립하였기 때문에 x축 스테이지 자중에 의한 모멘텀으로 인하여 y축 스테이지 구동변위 값이 크게 나타났다. 하지만 z축 스테이지는 기존 시스템과 달리 별로도 분리하여 구동 오차를 줄였으며, 일체화된 광학시스템을 적용하여 광학오차를 감 소시켰다. 따라서 새로운 시스템에서는 500μW, 140mm/min의 가공조건에서도 마이크로 스케일의 3차원 인 공지지체 형상의 구조물을 성공적으로 제작할 수 있었다.

풍동시험에서 지지 장치는 모델을 고정하고 원하는 받음각을 구현하기 위해 사용되지만, 지지 장치가 모델에 작용하는 유동에 간섭효과를 발생시키게 되므로 이에 대한 평가와 보정이 수행되어야 한다. 본 연구에서는 스포츠급 경항공기 1/5 축소 모델의 전기체와 동체 형상에 적용된 배면스팅-반달형 지지장치의 유동간섭 효과를 더미 스팅 방법을 이용하여 공력의 변화를 측정하여 정량적으로 분석하였다. 풍동실험 결과, 하방 스팅의 유동간섭은 전기체 형상의 경우 양력계수에는 2.8%, 항력계수에는 3.4%의 영향을 끼치는 것으로 확인되었다.

The purpose of this study was to investigate the effect of visual feedback on the postural control of stroke patients, by systematically varying conditions of visual feedback [eye-open condition (EO) vs. eye-closed condition (EC)], and base-support (both-side support, affected-side support, and unaffected-side support). In this study, we allocated 41 stroke patients with no damage in the cerebellum and visual cortex who can walk at least 10 meters independently, and 35 normal adults who have no experience of stroke to the control group. Both groups were asked to perform a "sit-to-stand" task three to five times, and their postural control ability was measured and compared in terms of asymmetric dependence (AD) instead of the traditional symmetric index (SI) in the literature. The results showed that although both subject groups maintained better postural control in the EO condition than in the EC condition, the patient group appeared to be more stable in EC than in EO when they were required to perform the task of the support condition given on the affected side. These results implied that visual feedback can impair stroke patients' postural control when it is combined with a specific support condition.

The purpose of this research was to provide basic data for managing players by determining the relation between the social support within the Taekwondo team in secondary schools and the burnout of players. The population to achieve this research purpose was the Taekwondo players of secondary schools in the Daejeon, Chungnam region registered as players in Korea Taekwondo Association as of 2010. For the sampling method, the convenience sampling, that was the non-probability sampling, was used, and the final analysis to obtain the results used a total of 222 persons’ data. As the method of statistical analysis for data processing, the multiple regression analysis were conducted. The proof of hypotheses was conducted at the significance level of α=.05, and the results are as follows. First, only the emotional support among the social support factors was found to have statistically significant negative(–) effects on the emotional exhaustion. However, the informative support, instrumental support, and evaluating support were found to have no statistically significant effects on emotional exhaustion. Second, the instrumental support and evaluating support among the social support factors were found to have statistically significant negative(–) effects on depersonalization. However, the informative support and emotional support were found to have no statistically significant effects on depersonalization. Third, only the evaluating support among the social support factors was found to have statistically significant negative(–) effects on the decline in the sense of accomplishment. However, the informative support, emotional support, and instrumental support were found to have no statistically significant effects on the decline in the sense of accomplishment.

본 연구는 이산화탄소를 효율적으로 분리하기 위한 이온성액체 지지분리막 제조를 목적으로 한다. 공칭크기 0.1 mum PVDF 정밀여과막에 이온성액체인 [bmim][PF6] (1-butyl-3-methylimidazolium hexafluorophosphate)를 분리막 세공내로 흡입시켜 고정화하였다. 제조된 이온성액체 지지막에 대한 N2, H2, CO2 기체의 투과도는 0.075, 0.203, 1.380 GPU로 측정되었으며 CO2/N2, H2/N2의 선택도는 각각 14.2와 2.69이었다. 또한 이온성액체 지지분리막은 이온성 액체가 운전압력 2.0 bar까지 세공 내에 고정되어 안정적으로 운전 가능하였다.

In the present study, an Element-Based Lagrangian Formulation for the nonlinear analysis of shell structures is presented. The strains, stresses and constitutive equations based on the natural co-ordinate have been used throughout the Element-Based Lagrangian Formulation of the present shell element which offers an advantage of easy implementation compared with the traditional Lagrangian Formulation. The Element-Based Lagrangian Formulation of a 9-node resultantstress shell element is presented for the anisotropic composite material. The element is free of both membrane and shear locking behavior by using the assumed natural strain method such that the element performs very well in thin shell problems. The arc-length control method is used to trace complex equilibrium paths in thin shell applications. Numerical examples for laminated composite curved shells presented herein clearly show the validity of the present approach and the accuracy of the developed shell element.

In this article, we proposed a novel technique to fabricate cell‐culturing scaffold, that is, the hollowcylinder‐ grain assembly technique. This technique uses hollow cylindrical particles with sub‐mm thickness. Firstly, we fabricate PCL (polycaprolactone) hollow cylinder with sub-mm thickness using lab-made stainless steel mold. After that, we put the above-mentioned fabricated particles into a metal mold of which temperature could be controlled with hot plate and heat insulation system. PCL particles in the metal mold could be assembled together without severe collapsing under adequate temperature and time. Consequently, we could fabricate scaffold or foam structure with interconnected‐porosity and observed surface of cross section of fabricated scaffold by SEM.

The purpose of this study was to identify the factors determining the participation restriction of chronic stroke patients based on international classification of functioning, disability, and health (ICF) model. Sixty-eight stroke patients participated. The participants were assessed participation restriction using the Korean version of London handicap scale (K-LHS), modified Barthel index (K-MBI) to measure activities of daily living, Berg balance scale (K-BBS) to assess balance, and the center for epidemiologic studies depression (K-CES-D) to gauge depression. Also, 3 minutes walking test (3MWT), gait velocity, asymmetric posture, and family support were assessed. A stepwise multiple regression analysis was used to explore the factors determining participation restriction. There were no significant different in the K-LHS and K-MBI results by gender (p>.05). Correlations between the K-LHS and K-MBI (r=-.656), K-BBS (r=-.543), K-CES-D (r=.266), 3MWT (r=-.363), gait velocity (r=.348), and family support (r=-.389) were significant (p<.05). Also, the K-MBI and family support were the factors that determined participation restriction (p<.05) and that 40.2% of the variation in the K-LHS can be explained. Therefore, it is suggested that evaluation and intervention of patient's activity level and extent of family support is necessary to reduce participation restriction of chronic stroke patients.

This study used an unstable platform to change the support surface type and position of both lower limbs in order to determine changes in weight distribution and muscle including the vastus medialis, tibialis anterior, lateral hamstring, and lateral gastrocnemius of both lower limbs were evaluated during knee joint flexing and extending in a semi-squat movement in 32 hemiplegic patients. The support surface conditions applied to the lower limbs were divided into four categories: condition 1 had a stable platform for both lower limbs; condition 2 had an unstable platform for the non-hemiplegic side and a stable platform for the hemiplegic side; condition 3 had a stable platform for the non-hemiplegic side and an unstable platform for the hemiplegic side; and condition 4 had an unstable platform for both sides. The normalized EMG activity levels of muscles and weight bearing ratio of both sides in the four surface conditions were compared using repeated measures ANOVA. A significant increase was found in the weight support distribution for the hemiplegic side in flexing and extending sessions in condition 2 compared to the other conditions (p<.05). A statistically significant decrease in significant decrease in asymmetrical weight bearing in flexing and extending sessions was observed for condition 2 compared to the other conditions (p<.05). A similar significant decrease was found in differences in muscular activity for both lower limbs in condition 2 (p<.05). The muscular activity of the hemiplegic side, based on the support surface for each muscle showed a significantly greater increase in condition 2 (p<.05). An unstable platform for the non-hemiplegic side and a stable platform for the hemiplegic side therefore increased symmetry in terms of the weight support distribution rate and muscle activity of lower limbs in hemiplegic patients. The problem of postural control due to asymmetry in hemiplegic patients should be further studied with the aim of developing continuous effects of functional training based on the type and position of the support surfaces and functional improvement.

The numerous Korean church today embraces the technical goal of the invention building the paradigm of the new mission about the Chinese student studying abroads flowed in into the righteousness, to pay attention to the interior of a country China student studying abroads to the oversea missionary work resource voluntarily, the interior of a country. While the mission environment of Korean Chinese student studying abroads is unable to be good, the result which can be obtained through the missionary activity of the missionaries in China field church is very low. If for the missionary judgment of the Korean churches, the focus is adjusted to the Chinese student studying abroads, the long-term mission strategy which creates the social support system and so that the it has been growing in the mutually different cultural area Chinese student studying abroads can adapt well the Chinese student studying abroads to the Korean culture and college life and can minimize the culture shock because of the gospel will be established. The stress removal factor in which the student studying abroads can take the emotional psychological relaxation is grasped and the Christian culture and the faith settlement, that is the gospel, should be made. the various pattern of adjustments show as to Chinese student studying abroads’ right-foot shoot. However, that it is attached when it has to pay attention. Whether it is familiar with the various factorses including the member of the cultural area, living this success popular culture, language, and etc. or not. However, while the existing values according to the socialist identity which they have in the process of doing Korean college life and world view underwent a lot of difficulties in strange Korean cultural adaptation, the stress was experienced. In this condition, when the church community sets the mission direction and strategy, the many-sided effort for the stress relaxation according to the cultural adaptation of the Chinese student studying abroads is required. the strategic access about how approaching from the position in which the Social Support for canceling the stress required for the cultural adaptation for Korean Chinese college life is needed is required. It has the values, of the church the world view and existing paradigm so far, it is not easy to propagate the Chinese student studying abroads. The strategic access to the new paradigm which can be managed with the form of ‘the come mission’ in ‘it visits mission’ paradigm which the church and missionary group had been providing is desperately required. Therefore the mission resource in which many churches can distinguish the various obstacle according toes the Chinese student studying abroad mission and which can overcome this has to be communally created.

The purpose of this study is to examine the activity ratios of global trunk muscles and local trunk muscles in relation to adjustments in the level of task difficulty while performing stability exercises in easily applied bridging lumbar stabilization exercise. Twenty healthy subjects performed bridging lumbar stabilization exercise while the level of task difficulty was plate was used in the same posture for all the exercises. EMG was used to examine the activity ratios of the global muscles and multifidus in relation to the level of task difficulty. Moreover, the activity ratios of the multifidus muscle, the erector spinae and the gluteus maximus muscle were measured. A one-way ANOVA with repeated measures was used, and a Bonferroni correction was conducted (=.05). When the bridging lumbar stabilization exercise were performed at different difficulty levels, the activity of the multifidus muscle, which is a local muscle, was high in all three exercises. Also, compared to low intensity and intermediate intensity exercises, high intensity exercises showed more significant differences (=.05). Among all the muscles, the multifidus showed the highest activity at intermediate intensity. Based on these results, we suggest that in the case of bridging lumbar stabilization exercise, low intensity or intermediate intensity exercises are more suitable and efficient for local muscle stabilization.

Pt nanoparticle catalysts incorporated on RuO2 nanowire support were successfully synthesized and their electrochemical properties, such as methanol electro-oxidation and electrochemically active surface (EAS) area, were demonstrated for direct methanol fuel cells (DMFCs). After fabricating RuO2 nanowire support via an electrospinning method, two different types of incorporated Pt nanoparticle electrocatalysts were prepared using a precipitation method via the reaction with NaBH4 as a reducing agent. One electrocatalyst was 20 wt% Pt/RuO2, and the other was 40 wt% Pt/RuO2. The structural and electrochemical properties of the Pt nanoparticle electrocatalysts incorporated on electrospun RuO2 nanowire support were investigated using a bright field transmission electron microscopy (bright field TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry. The bright field TEM, XRD, and XPS results indicate that Pt nanoparticle electrocatalysts with sizes of approximately 2-4 nm were well incorporated on the electrospun RuO2 nanowire support with a diameter of approximately 50 nm. The cyclic voltammetry results showed that the Pt nanoparticle catalysts incorporated on the electrospun RuO2 nanowire support give superior catalytic activity in the methanol electro-oxidation and a higher electrochemically active surface (EAS) area when compared with the electrospun Pt nanowire electrocatalysts without the RuO2 nanowire support. Therefore, the Pt nanoparticle catalysts incorporated on the electrospun RuO2 nanowire support could be a promising electrode for direct methanol fuel cells (DMFCs).

The purpose of this study was to investigate the effects of a task-oriented approach on weight-bearing distribution and muscular activities of the paretic leg during sit-to-stand movement in 18 chronic stroke patients. Both groups were received neurodevelopmental treatment for 30 min/day and then the experimental group (=9) followed additional a task-oriented approach (sit-to stand training with controlled environment) and the control group (=9) followed a passive range of motion exercise for 15 min/day, five days/week, for four weeks. Weight-bearing distribution and muscular activities of the paretic leg during sit-to-stand movement were measured before and after four weeks of training. There was significantly improved weight-bearing distribution of the paretic leg during sit-to-stand movement in the experimental group compared with that of the control group after four weeks of training (p<.05). But electromyographic activities of the quadriceps and the tibialis anterior of the paretic leg were not significantly different (p>.05). Thus, it is necessary to apply a task-oriented approach to improve the weight-bearing distribution of the paretic leg during sit-to-stand movement in chronic stroke patients.

최근 자연공원 내 케이블카 설치에 대한 타당성 여부를 놓고 찬반 그룹 간에 논쟁이 뜨겁다. 본 연구는 인구사회학적 특성 및 방문경험과 자연과의 유대와의 관계, 자연과의 유대와 케이블카 설치로 인한 결과(사회, 경제, 생태적)에 대한 신념 및 케이블카 설치 지지도와의 관계를 조사하였다. 자료수집은 2010년도 9월 중 총 134명의 무등산도립공원 방문객을 대상으로 현지설문조사를 통해 이루어졌다. 자연과의 유대는 Mayer and Frantz(2004)의 "자연과의 유대척도"를 수정한 척도를 이용하여 측정하였다. 자연과의 유대는 요인분석 결과 2개의 요인, 즉 '상호의존적', '독립적' 요인으로 구분되었다. 응답자의 연령, 교육수준, 무등산도립공원 방문횟수 및 무등산 중봉지역 방문횟수가 높아지거나 많아질수록 자연과의 유대가 증가하였다. 자연과의 유대가 높은 응답자가 낮은 응답자에 비하여 케이블카 설치로 인한 부정적 결과에 대한 신념이 컸지만 긍정적 결과에 대한 신념과는 관계가 없었다. 자연과의 유대 수준이 높은 응답자는 낮은 응답자에 비하여 케이블카 설치에 대한 지지도가 낮게 나타났다.