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Friction and lubrication of articular cartilage
Hilšer, Pavel ; Daniel, Matej (referee) ; Vrbka, Martin (advisor)
The main goal of this diploma thesis is to determine the role of hyaluron acid and phospholipids on friction and lubrication of articular cartilage in regard to optimization of viscosupplements. This is carried out by measuring the coefficient of friction of the articular cartilage with several lubricants. Cartilage is lubricated particularly by a conventional viscosuplement, optimized viscosuplementation with phospholipids and model synovial fluid. In order to observe the function of those viscosuplements in the human body, both are mixed with the model synovial fluid, ubiquitous in human joints, in given ratio. Experiments revealed high friction when it comes to convectional viscosupplementation as opposed to low friction of the optimized viscosuplement with phospholipids. The same situation occurs when cartilage is lubricated with those viscosuplements mixed with model synovial fluid which might lead to development of a new, better, viscosupplementation based on hyaluron acid and phospholipids.
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Design of dynamic vibration absorber
Hilšer, Pavel ; Musil, Filip (referee) ; Hadraba, Petr (advisor)
Firs part of bachelor's thesis deals with vibrations, main quantities, damping and methods of solving dynamics models. In second part, description of tuned mass damper is carried out. Then tuned mass damper is designed using matlab, simulik for given entity. Values, calculated using this method are compared with finite element method. After that the entity is realized and measured using modal hammer and accelerometer. Calculated values are compared with values measured values.
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Friction and lubrication of articular cartilage
Hilšer, Pavel ; Daniel, Matej (referee) ; Vrbka, Martin (advisor)
The main goal of this diploma thesis is to determine the role of hyaluron acid and phospholipids on friction and lubrication of articular cartilage in regard to optimization of viscosupplements. This is carried out by measuring the coefficient of friction of the articular cartilage with several lubricants. Cartilage is lubricated particularly by a conventional viscosuplement, optimized viscosuplementation with phospholipids and model synovial fluid. In order to observe the function of those viscosuplements in the human body, both are mixed with the model synovial fluid, ubiquitous in human joints, in given ratio. Experiments revealed high friction when it comes to convectional viscosupplementation as opposed to low friction of the optimized viscosuplement with phospholipids. The same situation occurs when cartilage is lubricated with those viscosuplements mixed with model synovial fluid which might lead to development of a new, better, viscosupplementation based on hyaluron acid and phospholipids.
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Design of dynamic vibration absorber
Hilšer, Pavel ; Musil, Filip (referee) ; Hadraba, Petr (advisor)
Firs part of bachelor's thesis deals with vibrations, main quantities, damping and methods of solving dynamics models. In second part, description of tuned mass damper is carried out. Then tuned mass damper is designed using matlab, simulik for given entity. Values, calculated using this method are compared with finite element method. After that the entity is realized and measured using modal hammer and accelerometer. Calculated values are compared with values measured values.
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