Development of Plastic Suspension System for Automotive Seat

Cho, Jae Ung; Kim, Key-Sun; Choi, Dooseuk; Kim, Sei-Hwan; Bang, Seung-Ok; Cho, Chan-Ki

doi:10.5762/kais.2011.12.3.1091

Cited by 14 publications

(1 citation statement)

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“…Seok et al investigated the effects of different concentrations of Mito-TEMPO (0, 0,5, 5, 50 and 500 μM) on the motility of frozen-thawed porcine sperms. They proved that Mito-TEMPO addition had a beneficial effect on the motility of pig sperms (40). In another study, Kumar et al added 50 μM Mito-TEMPO and 50 μM acetovanillone to freezing solution of buffalo sperm.…”

Section: The Effects Of Mito-tempo On Sperm Cryopreservationmentioning

confidence: 99%

The effects of Mito-TEMPO, a mitochondria targeted antioxidant, on frozen human sperm parameters

SAYLAN¹,

Dıramali²

2023

tjhealthsport

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Aim:The goal of this study is to find out if Mito-TEMPO, an antioxidant that targets mitochondria, can improve the quality of frozen human sperm.Material-Method: Normospermic 25 human semen samples were frozen and stored in solutions including different concentrations (0, 5, 10 and 50 µM) of Mito-TEMPO. After thawing, they were evaluated in terms of sperm motility, viability, morphology, chromatin integrity and apoptosis.Result: Sperm morphology was not found to change after cryopreservation. Viability was found to be significantly preserved in groups that were added Mito-TEMPO (p<0.01). When the motility of the sperms after they had been frozen was compared, the group that added 50 µM Mito-TEMPO had the most motile sperms. (p<0.05), even though there was no statistically significant difference between the groups that added 1 µM Mito-TEMPO and the groups that did not add Mito-TEMPO. In addition, chromatin decondensation and apoptosis rate decreased significantly in groups that were added Mito-TEMPO (p<0.01). Conclusion:Mitochondria targeted antioxidant Mito-TEMPO improves sperm quality that decreases after thawing.

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Section: The Effects Of Mito-tempo On Sperm Cryopreservationmentioning

confidence: 99%

The effects of Mito-TEMPO, a mitochondria targeted antioxidant, on frozen human sperm parameters

SAYLAN¹,

Dıramali²

2023

tjhealthsport

View full text Add to dashboard Cite

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Structural Strength Analysis at Cushion Frame and Back Frame of Automotive Seat

김성수¹,

김기선²,

최두석³

et al. 2012

Journal of the Korea Academia-Industrial cooperation Society

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Among the various parts of automobile, automotive seat is the most fundamental item that ride comfort can be evaluated as the direct contact part with human body. Automotive seat must have the sufficient rigidity and strength at the same time with ride comfort. In this study, cushion frame and back frame at car seat are modelled with 3D. There are structural simulation analyses about 3 kinds of tests on torsion strength, vertical load strength and back frame strength. In the analysis result, the initial total deformation and the permanent total deformation has the maximum values of 5.4821 mm and 0.02539mm respectively at the torsion strength test of cushion frame. Total deformations at front and rear end parts of cushion frame become the values of 2.1159mm and 0.0606mm respectively at the test of vertical load strength of cushion frame. In case of more than this load, the maximum value of total deformation also becomes 3.1739mm. The maximum value of total deformation becomes 0.18634mm at 3 kinds of the strength tests on back frame. By the study result of no excessive deformation and no fracture cushion frame and back frame at automotive seat, the sufficient rigidity and strength to guarantee the safety of passenger can be verified.

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Human Body Vibration Analysis under Consideration of Seat Dynamic Characteristics

강주석

2012

Journal of the Korea Academia-Industrial cooperation Society

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In this study, vibration properties of seat and human body are analyzed through test and numerical analysis methods by taking into account the viscoelastic characteristics of polyurethane foam as seat material which is applied for vehicle. These viscoelastic characteristics which show nonlinear and quasi-static behavior are obtained by compression test. In addition, the viscous elastic property of polyurethane foam is modelled mathematically by using convolution integral and nonlinear stiffness model. In order to analyze the performance on ride comfort of seat, vertical vibration model is established by using dynamic model of seat and vertical vibration model of human body at ISO5982, and so the related motion equations are derived. A numerical analysis simulation is applied by using the nonlinear motion equation with Runge-Kutta integral method. The dynamic responses of seat and human body on the input of vibration acceleration measured at the floor of the railway vehicle are examined. The variation of the index value at ride comfort on seat design parameters is analyzed and the methodology on seat design is suggested.

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Development of Plastic Suspension System for Automotive Seat

Cited by 14 publications

References 1 publication

The effects of Mito-TEMPO, a mitochondria targeted antioxidant, on frozen human sperm parameters

The effects of Mito-TEMPO, a mitochondria targeted antioxidant, on frozen human sperm parameters

Structural Strength Analysis at Cushion Frame and Back Frame of Automotive Seat

Human Body Vibration Analysis under Consideration of Seat Dynamic Characteristics

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