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대동작 기능분류 시스템 수준 I과 II 뇌성마비 환자에게 맞춤형 인솔 착용이 보행에 미치는 영향
김희탁(Kim, Hee-Tak),김성경(Kim, Sung-Gyung) 한국보건기초의학회 2021 한국보건기초의학회지 Vol.14 No.2
The purpose of this study was to determine the effect on the temporal-spatial parameters and timed up and go tests with or without customized insoles for spastic cerebral palsy with Gross Motor Function Classification System (GMFCS) leves (I and II). GAITRite system was measured to temporal-spatial gait pareameters and gait speed were measured with time up and go test (TUG). Participants were 19 subjects diagnosed cerebral palsy and the statistical method was paired t-test. The results showed a significant decrease in walking tests after wearing before wearing the insole, and significant changes velocity, TUG, step length, stride length, single support Rt, double support, stance Lt (p< 0.05), but step time, cycle time, single support Lt, stance Rt did no differ significantly (p> 0.05). As a result, if a significant change occurs in the walking speed, temporal-spatial parameters and the difficulty of walking due to various foot deformations, it has a positive effect on walking by wearing a patient-specific insole.
만성 뇌졸중 환자에서 순환식 운동프로그램이 호흡근력과 폐기능에 미치는 영향: 사전연구
김희탁(Kim Hee Tak) 한국보건기초의학회 2018 한국보건기초의학회지 Vol.11 No.2
The study involved 20 chronic stroke patients who trained for six weeks by applying a circuit exercise program. The patients were measured before and after the training program for respiratory muscle strength (MIP and MEP) and pulmonary function (FVC, FEV1, FEV1/FVC). A total of six circuit exercise programs were applied. A paired t-test was performed to determine the difference in respiratory muscle strength and pulmonary function of the subjects. The significance level was set to α=0.05. Respiratory muscle strength (MIP and MEP) increased significantly after the circuit exercise program. Pulmonary function (FVC1, FEV1/FVC) was also significantly higher after training than before training. However there was no significant change in lung function (FVC). The circuit exercise program was effective in improving both respiratory muscle strength and pulmonary function in chronic stroke patients. It is anticipated that circuit exercise programs can be applied to chronic stroke patients to improve and speed up their recovery.
지역사회에 거주하는 만성 뇌졸중 환자의 몸통 근력 운동과 가동성 운동이 폐기능과 보행의 상관관계
김희탁(Kim Hee Tak) 한국보건기초의학회 2019 한국보건기초의학회지 Vol.12 No.1
The purpose of this study was to investigate the effects of a body strengthening and movement-based exercise program on chronic stroke patients. There was an emphasis on any changes to the patients’ pulmonary function, respiratory muscle strength, cardiorespiratory function, and their ability to walk. Twenty patients, 11 males and 9 females, performed trunk muscle exercises and mobility exercises twice a week for 8 weeks. The subjects had their pulmonary function and respiratory muscle strength measured before and after the exercise program. These data were then evaluated using a paired t-test. A Pearson’s correlation coefficient was also performed to investigate any connection between walking and cardiopulmonary function after the exercise program. It was decided to set the significance level at α=0.05. Pulmonary function (FVC, FEV1, FEV1/FVC%) and respiratory muscle strength (MIP, MEP) were significantly increased (p<0.05) by the exercise program. As for the effects on walking; 10m walking, velocity, and cadence were significantly changed (p<0.05). However, no significant difference in step time differential and step length differential (p>0.05) were found. Futhermore, the study discovered a positive correlation between velocity and respiratory muscle strength. In conclusion, a body strengthening and movement-based exercise program is an effective way to improve pulmonary function, respiratory muscle strength, and walking ability in chronic stroke patients.
김희탁 ( Hee-tak Kim ) 한국공업화학회 2017 공업화학전망 Vol.20 No.3
본고에서는 바나듐 레독스 흐름전지의 핵심 부품인 멤브레인의 기술적 이슈와 개발동향에 대해 정리하였다. 현재 나피온계 멤브레인은 우수한 전기화학적 특성 및 우수한 기계적/화학적 내구성을 가져 상업적으로 적용되고 있으나, 높은 가격으로 인한 시스템 저가격화의 한계로 인해 저가 대체제의 개발 필요성이 증대되고 있다. 이에 따라, 두께저감을 통한 나피온 소재사용량 저감, 저가 탄화수소계 멤브레인의 내산화성 향상, 저가 다공성 멤브레인의 바나듐 크로스오버 억제의 방향으로 연구개발이 이루어지고 있다. 국내에서도 멤브레인 및 전지산업에서 축적된 기술들의 융합을 통한 경쟁력 있는 멤브레인의 개발이 필요한 시점이다.
제화의 고객지향적 품질창조에 관한 실증적 연구 - Kano 의 모형과 QFD 를 중심으로 -
김희탁(Hee Tak Kim),이종철(Jong Chul Lee) 한국품질경영학회 2002 품질경영학회지 Vol.30 No.1
The purpose of this study was to empirically examine the customer oriented quality creation by considering quality elements required by customers in the product design process. The study tried to extract attractive quality elements by using Kano`s model. After identifying the elements HOQ(the house of quality) of QFD(quality function deployment) was used to identify the trend of quality elements evaluation. Test for equal means (t-test) was applied to verify the attractive quality elements of adult shoes. It made us find the customer oriented quality elements from the customer needs and latent dissatisfaction. We collected the opinions of experts on shoes and complete the cause and effect diagram and affinity diagram (KJ method). The data of the questionnaire was put to the QFD and the contents of quality elements was identified by brain storming method. We calculated indexes which were the multiplication of weight and marks of quality elements in the cross table of the HOQ by QFD. Then we tested for the equality of means between the indexes and the sum of attractive quality elements. The results for equal means were statistically significant. To create the customer quality the product design should be differentiated between the age groups over attractive quality elements.