|
Lower limb prosthetics FEM analysis
Omasta, Milan ; Náhlík, Luboš (referee) ; Paloušek, David (advisor)
This masters´s thesis deals with computational modeling of transtibial lower-limb prosthesis. For assesment of loading character and geometrical configuration, the gait analysis of an amputee, including ground reaction force measurement, strain gauge analysis and motion analysis, was accomplished. Information on geometry was obtained using 3D optical scanning procedure. Material model was gathered using non-destructive mechanical testing and mimicked in a FEA software. For loading conditions the static structure analysys using FEM was accomplished. The critical poins in construction was found. Recognition of agreement about experimental and computational model was accomplished.
|
|
Analysis of the effect of the partial sports massage to specific musculoskeletal injuries of athletes in mixed martial arts at club Gladiators gym Czech Budejovice
MARŠÁLEK, Martin
The bachelor thesis is concerned with the effectiveness of specific regeneration on particular functional defects caused by mixed martial arts training (MMA). The effectiveness of partial sports massage and compensatory exercises was tested on three chosen probands for six weeks. Programs for home use were drawn up on the basis of the individual injuries. In the thesis, the matter of MMA, its development, and the reasons for its recent popularity are briefly summarised. Then, the techniques of MMA, which caused the impairments, how the impairments manifest and in what ways they limit the athletes. Content analysis and synthesis were used. The research was conducted in the form of individual case studies. Using semi-structured interviews, case-histories of the probands were created. Functional muscle tests were used for the examinations of the musculoskeletal system. This was followed by the application of massage and compensatory exercises. The probands evaluated the progress of pain subjectively after each massage using a visual analog scale. According to the visual analog scale, the perception of pain was reduced by an average of three degrees.
|
|
Influence of social environment on the child's school readiness
HOLUBOVÁ, Jarmila
Influence of social environment on the child's school readiness The theoretical part deals with explanation of the terms school readiness (in all of its aspects and its imoportance in a child?s life) and socialization. The practical part focuses on the influence of social environment on the maturation of the child for school. It includes case studies of children, interviews with their teacher, school maturity tests and analysis of drawings.
|
|
The effect of gait training with a prosthesis on stability and parameters in patients with thigh amputation
Tučková, Tereza ; Smékal, David (advisor) ; Kálal, Jan (referee)
Diploma thesis "Effect of gait school with prosthesis on stability and walking parameters of patients after transfemoral amputation deals with problems of patients after transfemoral amputation due to vascular etiology. It mentions elementary knowledge of rehabilitation after amputation of lower extremity. Furthermore, there are described main complications that amputation brings into the patient ́s life: pain associated with amputation, skin complications and psychological hardships. Emphasis is laid on gait and gait practice for patients with amputation. I further deal with deviations commonly observed on gait of these patients and with factors influencing the gait, including the influence of particular parts of the prosthesis on patients ́ gait. The practical part is dedicated to comparison of two different approaches to gait practice. The effect of these approaches is evaluated on the basis of results of two groups of patients. The results were gathered by examination on force plate, measurement of gait velocity, examination of gait cadence and evaluation of patients ́s gait videos. Furthermore, I use functional tests: LCI - 5, ABIS - R, ABC scale and PEQ. All of these examinations were performed at the beginning and in the end of patients ́ stay at the Clinic of rehabilitation in Hradec Králové. The...
|
|
Effect of snowpack on runoff generation during rain on snow event.
Juras, Roman ; Máca, Petr (advisor) ; Ladislav , Ladislav (referee)
During a winter season, when snow covers the watershed, the frequency of rain-on-snow (ROS) events is still raising. ROS can cause severe natural hazards like floods or wet avalanches. Prediction of ROS effects is linked to better understanding of snowpack runoff dynamics and its composition. Deploying rainfall simulation together with hydrological tracers was tested as a convenient tool for this purpose. Overall 18 sprinkling experiments were conducted on snow featuring different initial conditions in mountainous regions over middle and western Europe.
Dye tracer brilliant blue (FCF) was used for flow regime determination, because it enables to visualise preferential paths and layers interface. Snowpack runoff composition was assessed by hydrograph separation method, which provided appropriate results with acceptable uncertainty. It was not possible to use concurrently these two techniques because of technical reasons, however it would extend our gained knowledge. Snowmelt water amount in the snowpack runoff was estimated by energy balance (EB) equation, which is very efficient but quality inputs demanding. This was also the reason, why EB was deployed within only single experiment.
Timing of snowpack runoff onset decrease mainly with the rain intensity. Initial snowpack properties like bulk density or wetness are less important for time of runoff generation compared to the rain intensity. On the other het when same rain intensity was applied, non-ripe snowpack featuring less bulk density created runoff faster than the ripe snowpack featuring higher bulk density. Snowpack runoff magnitude mainly depends on the snowpack initial saturation. Ripe snowpack with higher saturation enabled to generate higher cumulative runoff where contributed by max 50 %. In contrary, rainwater travelled through the non-ripe snowpack relatively fast and contributed runoff by approx. 80 %.
Runoff prediction was tested by deploying Richards equation included in SNOWPACK model. The model was modified using a dual-domain approach to better simulate snowpack runoff under preferential flow conditions. Presented approach demonstrated an improvement in all simulated aspects compared to the more traditional method when only matrix flow is considered.
|
|
The issue of death and its psychological potencial
Ježková, Tereza ; Štětovská, Iva (referee) ; Šípek, Jiří (advisor)
In this study we wanted to explore, if there exists a relationship between spiritual orientation of people and their attitude to death. In the theoretical part, there were this two subjects (spirituality and death) described, explained and related to other important issues (for example: fear of death, the spiritual clime in the modern society, spiritual growth and motivation for the spiritual way of life, spiritual care of dying people etc.). This part discusses three representative kinds of spirituality too - the Christian reigion, the Buddhist spirituality and the "faith of atheists" - especially in their relation to death. In the empirical part we used a modified version of The Test of Colour Semantic Differential to verify that there exists greater integrity between conscious and unconscious dimension of attitude to death among the people with clear-cut spiritual orientation. Howewer, the results of the research haven't made it possible to falsificate the zero hypothesis.
|
|
Hogan tests in personnel-psychology practice
Motijevskij, Maxim ; Štikar, Jiří (referee) ; Wagnerová, Irena (advisor)
This diploma thesis is aimed to the use of personality inventories in personnel psychology practice. Theoretical part contains general methodology tasks of the personality research, discussion of faking in personality inventories, description and assessment of the structure and psychometric qualities of the tests by Robert and Joyce Hogan: Hogan Personality Inventory, Hogan Development Survey and Motivation, Values and Preferences Inventory. Empirical part is focused on the usage of HPI for the purposes of comparison of profiles of psychology students with Czech population. In the diploma thesis was found out, that Hogan tests are substantial gain for the work and organizational psychology. They could be used as very useful instruments in the modern personnel psychology practice.
|
|
Advanced Fabrication of Custom Orthopaedic Implants Using Selective Laser Melting Technology
Trubačová, Pavlína ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
This work describes advanced fabrication of custom orthopaedic implants using unconventional additive manufacturing technology - Selective Laser Melting (SLM). There was a main focus on custom knee replacement and certainly on its femoral component. The study investigated three general issues within the domain of the usage of additive manufacturing technology in medical application. First, there was an evaluation of process parameters influences of SLM fabrication method on surface and mechanical properties of titanium Ti6Al4V ELI specimens. This material was used because of its biocompatibility and its wide use within implant fabrication. Then, a proposal of the manufacturing strategy was carried out and the fabrication of customized knee femoral component prototype by SLM technology was done. The elaboration of the numerical chain prior the SLM implant fabrication, from patient's CT knee scan to final femoral replacement model, was also done. Then, a proposal of different 3-axis and 5-axis strategies of machining of the fitting femoral surface of bone prototype (3D printed from the powder) using CNC machines FV 25 CNC and TAJMAC ZPS MCV 1210 was projected and also, the 3-axis spiral machining was realised. The individual machining tool paths were generated by software Power Mill from Delcam group. Finally, these machining strategies were generated as a prior step before a machining of real patient’s bone, therefore the machining tests of cartilage and bone were done.
|
|
Comparison of two models of forest transpiration
Šír, Miloslav ; Čermák, J. ; Naděždina, N. ; Naděždin, V. ; Tesař, Miroslav
Two transpiration models were tested in the paper, one is with plant control, and another without plant control. Principle of the (1) model with plant control was, that physical mechanism of transpiration is evaporation actively controlled by plants. The supposed mechanism is: part of the heat (heat equivalent of the energy absorbed from solar radiation), which would cause overheating the plant above 25 ºC is dissipated by evaporation. The model has five physical parameters, which are in principle measurable. (2) The model without plant control is based on the assumption, that transpiration dissipates a constant fraction of the heat from the heat equivalent of absorbed solar radiation (about 45 %). The model needs only one measurable physical parameter. Both models were tested by comparing their results with results actually measured daily totals of transpiration (via sap flow) in the floodplain forest Pohansko (near the town of Břeclav, southernmost Moravia), which was typical with almost non-limiting soil water supply over the period May 1 to Sept. 30, 1998. Results of both models were almost equal. We discussed their physical differences evaluating their goals and weak points and specified a program for further testing the physical mechanism of transpiration.
|
|
Electrochemical characteristics of AZ31 and AZ61 magnesium alloys in Hanks‘ solutions
Minda, Jozef ; Wasserbauer, Jaromír (referee) ; Tkacz, Jakub (advisor)
This thesis deals with the characterization of electrochemical corrosion properties of magnesium alloys as promising materials for biomedical applications. The wrought alloys AZ31 and AZ61 were used and exposed to corrosive environments of Hanks solutions (SBF) to simulate environmental conditions in living organisms. For the evaluation of the surfaces was used scanning electron microscopy (SEM) with elemental analysis measured by energy-dispersive spectroscopy (EDS). Short-term (5 min) and long-term (72 h) corrosion tests were conducted in order to optimize the measurement methodology and obtain corrosion parameters - especially corrosion potential (Ekor), corrosion current density (ikor) and polarisation resistance (RP). To evaluation of the short-term tests were by potentiodynamic tests, namely the linear polarization (LP) test. Long-term tests were measured by electrochemical impedance spectroscopy (EIS). Effects of the composition of the alloys (AZ31 and AZ61), surface treatment (grinding and polishing) and the composition of the solution (SBF without Ca, Mg, and with Ca, Mg) were compared. Complex corrosion behaviour in time was characterized and corrosion mechanisms were discussed.
|
guest ::
