• Tribology and Lubricants
• /
• v.25 no.5
• /
• pp.324-329
• /
• 2009

In this study a complex design fitness analysis of journal bearings is carried out for the LPLi rotary-vane fuel pump application, as an external and horizontal installation, in LPG vehicles. Bearings considered in the analyses are plain and 3-axial groove journal bearings. Upon reflecting the fact that the primary failure mode of bearings in the application is a premature friction and wear failure of bearing metal due to a very low viscosity of liquid fuel LPG as a bearing lubricant, the performance factors of bearings used in an evaluation process of design fitness are a load carrying capacity and vibration suppression ability relative to a rated speed. At this time the design variables of bearings are a radial clearance and length. Results show that, in terms of both of the load carrying capacity and vibration suppression ability, the plain journal bearings are superior to the 3-axial groove journal bearings and among the plain bearings the smaller the bearing clearance (5>10>$15\;{\mu}m$) is and the longer the bearing length (6<8<10<12<14 mm) is, the better the bearing performance is.

• The Journal of Korean Academy of Orthopedic Manual Physical Therapy
• /
• v.21 no.2
• /
• pp.63-71
• /
• 2015

Background: The purpose of the study, using the ICF Tool in the process of rehabilitation of artificial joint replacement surgery of the hip joint, goal setting and understanding of the problem, through the process of creating intervention strategies, useful clinical practical course for rehabilitation I try to present the data. Methods: Fracture was the left total hip replacement (THR) surgery due to women of 76 years old. I proceed in order screening, evaluation, diagnosis, prognosis, treatment planning and intervention, re-screening. Needs of the patient was walking short distances for using the toilet. In order to improve was carried out arbitration, after you have created a list of issues that limit the ability to walk short distances. Results: It was revealed improved results in self-paced walk test (SPWT) and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) was used to examine whether the goals. In addition, MMT VAS, DGI, and TUG is a detailed goal was improved. Conclusions: It can be shown objectively the results of interventions performed for the purpose of solving the problem which is grasped through clinical Practical course for short-range walking ability enhance patient THR. I considered practical clinical course using the ICF Tool would be useful.

• Journal of Korean Physical Therapy Science
• /
• v.15 no.2
• /
• pp.25-32
• /
• 2008

Background: The purposes of this study were to examine whether “Berg Balance Sale(BBS)” had influence on the improvement of stroke patient's balancing ability, and to identify whether the effects had significant differences to these three groups that different frequency of BBS evaluation. Subjects were divided into three groups, a daily evaluating group (n＝12), weekly evaluating group (n＝12), and group that evaluating when admit and discharge (n＝12). Methods: All patients were treated general neurorehabilitative physical therapy for daily during 4 weeks. All patients of these groups were evaluated balance function by using of BBS balance testing tool. Results: At the first week and after 4 weeks, balance function that of these groups was improved significantly (p<,05). Especially, daily evaluating group was improved the most. In the comparison differences between 3 groups, daily evaluating group and weekly evaluating group, daily evaluating group and group that evaluating when admit and discharge were exhibited differences significantly. But there was no significant difference between weekly evaluating group and group that evaluating when admit and discharge. Conclusion: According to the results as presented above, testing method, BBS is effects on stroke patient's balancing ability considerably. And if BBS which can apply evaluate balance function properly apply with conventional neurorehabilitative physical therapy, stroke patients would obtain significant effects on the improvement of balancing ability.

• Journal of Korean Physical Therapy Science
• /
• v.19 no.2
• /
• pp.55-61
• /
• 2012

Background : The purpose of this study is to provide the basic data according to cognitive function, that will help activities of daily living of the elderly through the comparative study of activities daily living and functional training. Methods : The subjects of this study 122 patients 65 years old or more ADL and cognitive function assessment was evaluated. They were registered in the Elderly in nursing homes and welfare centers, located in Gyeonggi. All study participants had a sufficient explanation for the purposes of research and evaluation methods and procedures for the elderly. The survey period 17 October to 11 November 2011 was conducted through face-to-face survey was conducted. Results : Cognitive function according to the K-MMSE score of 24 points or more, 23 to 18 points, 17 points or less were classified. Ability to perform activities of daily living (personal hygiene, bathing, toilet use, stair climbing, dressing, stool control, urinary control, gait, chair/bed, etc.) according to the degree of cognitive function by evaluating the ability to perform daily living compared results in all variables were statistically significant (p<.5). Conclusion : As a result, the higher cognitive functions can be seen that the higher the ability to perform activities of daily living.

• Journal of Korean Academy of Fundamentals of Nursing
• /
• v.15 no.1
• /
• pp.14-21
• /
• 2008

Purpose: Objective Structured Clinical Examination(OSCE) has been used for clinical skill evaluation. This study was done investigate whether there are positive impact educational effects if nursing students are invited to develop OSCE modules. Method: The participants were 63 second-year students in one nursing college. Students were divided into 3 groups; the OSCE module development group(Exp1), traditional study group(Exp2), and control group(Cnt). Students were allocated according to clinical skill test scores to make the 3 groups equal. Exp1 developed OSCE modules, and Exp2 studied using traditional methods. Clinical skill tests and surveys were done to measure self-directed readiness, problem-solving ability, and self-efficacy before and after experimental treatments. Results: Clinical skill test scores increased significantly in all three groups, but Exp1 and Exp2 showed a higher clinical skill test score increment than Cnt. Self-directed readiness scores increased significantly in Exp1, but not in Exp2 and Cnt. Problem-solving ability scores increased significantly in Exp1 compared to Cont. Conclusion: Development of OSCE modules has positive educational effects for participating students in terms of clinical skill tests, self-directed readiness, and problem-solving ability.

• 한국정보디스플레이학회:학술대회논문집
• /
• 2008.10a
• /
• pp.1049-1052
• /
• 2008

We developed novel molecular dynamics and quantum chemical molecular dynamics simulators for the design of MgO protecting layer in plasma display panel. These simulators were applied to the investigations on the destruction processes of the MgO protecting layer as well as the evaluation of its second electron emission ability. From the simulation results, we successfully proposed new guidelines for MgO protecting layer with high durability and high second electron emission ability.

• Physical Therapy Korea
• /
• v.3 no.2
• /
• pp.42-48
• /
• 1996

Weight bearing training on the involved leg is impotant for ambulation and activities of daily living in ambulatory hemiplegic patients. Traditionally, physical therapists have relied on exercise therapy and subjective evaluation. The goal for this study was to measure lower extremity weight distribution in standing with ten hemiplegic pations(M:8, F:2) and to determine the traing effect on symmetrical standing posture using a "Limloader". The Limloader is a machine designed for training symmetrical weight bearing posture. The results showed that the ability to keep the center of gravity within the limits for balance was improved significantly but the ability to adjust weight bearing on the involved leg was not (p<0.05). This study demostrated that hemiplegics can improved their symmetrical weight bearing ability using sensory biofeedback.

• The Korean Journal of Emergency Medical Services
• /
• v.16 no.1
• /
• pp.31-51
• /
• 2012

Purpose: This study was to develop PBL packages geared toward fostering the problem-solving ability, self-directed learning capability and communicative competence of emergency medical technician students and to give some suggestions on the development of PBL packages of the approach based on the evaluation results of the packages by experts. Methods: First, real clinical situations that learners would be exposed to after graduation should be provided as examples when the packages are developed. Second, a variety of learning-facilitating tools should be offered to facilitate their understanding, because they don't yet gain plenty of clinical practice experiences. Third, they should be encouraged to have an energetic discussion in small group when the developed packages are applied. Conclusion: First, the packages developed in this study were just incorporated into some areas of a single course. In the future, the integration of an entire course or the development of a new course is required to attain the multiple learning objectives in the provided clinical situations. Second, this study attempted to develop the PBL packages to boost the problem-solving ability, self-directed learning capability and communicative competence of emergency medical technician students, and follow-up research should be implemented to finalize the packages based on the suggestions of the experts who evaluated them and to determine the effects of the packages.

• The Journal of Korean Academic Society of Nursing Education
• /
• v.16 no.1
• /
• pp.24-32
• /
• 2010

Purpose: This study was conducted to evaluate the results after implementing a simulation based critical care nursing education with $MicroSim^{(R)}$. Method: Simulation based education was used for a clinical scenario on a patient with chronic obstructive pulmonary disease(COPD) and acute coronary syndrome(ACS). Self-learning program was used for an acute asthma attack and acute myocardial infarction(AMI) in the $MicroSim^{(R)}$. A total of 97 nursing students were chosen. A pretest and posttest was conducted to evaluate learning achievement, clinical performance ability and self-directed learning. Result: Learning achievement and clinical performance ability significantly increased but self-directed learning did not. Conclusion: Simulation based education used with $MicroSim^{(R)}$ was useful for improving learning achievement and clinical performance ability of nursing students. Further studies are needed to compare the effects of simulation based education.

• Journal of Korea Multimedia Society
• /
• v.18 no.3
• /
• pp.387-400
• /
• 2015

A fuzzy logic based mobile robot navigation system was developed to improve the driving ability without trapping inside obstacles in complex terrains, which is one of the most concerns in robot navigation in unknown terrains. The navigation system utilizes the data from ultrasonic sensors to recognize the distances from obstacles and the position information from a GPS sensor. The fuzzy navigation system has two groups of behavior rules, and the robot chooses one of them based on the information from sensors while navigating for the targets. In plain terrains the robot with the proposed algorithm uses one rule group consisting of behavior rules for avoiding obstacle, target steering, and following edge of obstacle. Once trap is detected the robot uses the other rule group consisting of behavior rules strengthened for following edge of obstacle. The output signals from navigation system control the speed of two wheels of the robot through the fuzzy logic data process. The test was conducted in the Matlab based mobile robot simulator developed in this study, and the results show that escaping ability from obstacle is improved.