The subject of the diploma thesis is a description of movement of a roller which is a part of turbocharger. The diploma thesis is created in cooperation of the research department of Honeywell in Brno. The thesis consists of review concerning operating of turbochargers and possibilities of solving contact problems. Then static and dynamic conditions in contact are treated in the following part. Contact pressures are generated using numerical simulation in Ansys software. In the conclusion sizes and coefficients of friction which are recommended as the most suitable to achieve minimal wear of the components in contact.

Today is on products from the perspective of quality placed an increasing emphasis. This work is focused to the analyze of cross roll straghtening of long semifinished products with a circular cross-section. This process increased quality of semifinished products from the perspective of their curvature, because they do not reach the required limit values. Curvature of the semifinished product is due to residual stress, which is during straghtening using plastic deformation of the material redistributed and the semifinished product is leveled. This work analyzes the effect of rotation of straightening rolls on the distributiom of contact pressure between the straightening semifinished product and the roll of straightener. Author then analyzes effect of input parameters of program to straightening at the final curvature of the semifinished product. With the experience gained, then try to adjust some input parameters.

Traumatic damage to the cervical spinal cord has a dramatic impact on determinants affecting cardiovascular fitness. In tetraplegia, in addition to diminished skeletal muscle function, impaired sympathetic cardiovascular innervation together with a dysfunction of catecholamine release is typically present. Individuals with tetraplegia are at a high risk of long-term inactivity, which increasingly contributes to the development of common civilization diseases. The aim of the current dissertation project is to investigate the cardiovascular fitness in males with cervical spinal cord injury (n=20) as compared to able- bodied males (n=27). Both groups completed exercise testing on an arm-crank ergometer. Arterial blood pressure response to exercise, peak oxygen consumption and peak heart rate were the primary outcome variables. In the first part of the study, a graded maximal arm- crank ergometer test to the subjective exhaustion was performed for the inter-group peak exercise comparison. The peak power dramatically differs between the groups and could be an important confounding factor limiting the evaluation of a physiologic response related to the equivalent physical loading. Therefore, in the second part of the study, individuals of the control group completed a second graded arm-crank ergometer...

Hydrothermal fluids are important mass and heat transfer agents in the Earth's crust and mantle. Aside from their transport role, the aqueous fluids act as reactants or products in rock environment during diverse processes ranging from partial melting, magmatic and metamorphic devolatilization. This study evaluates the effect of equations of state and thermodynamic data for aqueous species on prediction of mineral solubility in aqueous fluids at high temperatures and pressures employing the Helgeson-Kirkham-Flowers model (HKF). These calculations require: (i) volumetric properties of water; (ii) dielectric properties of water; (iii) aqueous species thermodynamic properties. A comparison of ten equations of state against the IAPWS scientific standard reveals that volumetric properties of water up to 1200 řC and 50 kbar are predicted within 5 %, except at low pressure (below 2 kbar), temperatures higher than 1000 řC, and the liquid-vapor equilibrium curve, particularly in the proximity of the critical point of water. The deviations of volumetric and electrostatic properties of water propagate into the mineral solubility calculations. For quartz and corundum these deviations lead to discrepancy in mineral solubility of up to half an order of magnitude for molal concentrations. These discrepancies...

Author: Bc. Simona Bartošová Title: Effect of sensomotoric insoles on postural stability in children with cerebral palsy Objectives: Objectively assess the effect of sensomotoric insoles on children with cerebral palsy (CP) via COP (Centre of Pressure) parameters recorded on Kistler force plate. Methods: This thesis is designed as an experimental study. Selected paramaters of static postural balance were recorded via force plate to assess the effect of sensomotoric insoles. Five subjects (average age 7.2 years) with diagnosis of cerebral palsy were enrolled into the study. Data collection was carried out in two separated sessions - first before therapy and second after using the insoles for one month. The validity of the data was supported by three repetitions for each modification - upright plain stand with open eyes, upright stand with feet together and upright plain stand with closed eyes. Monitored parameters were: total trajectory of COP, amplitude of mediolateral displacement of COP, amplitude of anteroposterior displacement of COP and mean velocity of movement of COP. The data were analyzed in MATLAB® version R2019b. The statistical analysis was performed including the outliers elimination. The normality of data was checked by Lilliefors' test. In the case of normality a two-sample Student's...

The subject of my thesis is the exploration the landslide, landslide stabilization, design foundation and construct buildings in Brno Bystrc. Attention will be given to slopes safety factor and especially to design four-floor building construction.

In endoprosthesis surgery there are typically a high percentage of implant defects, these can lead to failure of the whole prosthesis. One type of total hip replacement function loss is acetabular cup loosening from the pelvic bone. This disertation examines manufacture perturbations as one of the possible reasons for this kind of failure. Both dimension and geometry manufacturing perturbations of ceramic head and polyethylen cup were analyzed. We find that perturbations in the variables analysed here affect considered values of contact pressure and frictional moment. Furthermore, contact pressure and frictional moment are quantities affecting replacement success and durability. From obtained results it can be recommended to fit head and cup with a clearance of between 0 mm and 0.05 mm. It can not be recommend using interference type of fit because of strong deterioration of the contact conditions. Roundness perturbation of ceramic head should not exceed 0.025 mm.

Traumatic damage to the cervical spinal cord has a dramatic impact on determinants affecting cardiovascular fitness. In tetraplegia, in addition to diminished skeletal muscle function, impaired sympathetic cardiovascular innervation together with a dysfunction of catecholamine release is typically present. Individuals with tetraplegia are at a high risk of long-term inactivity, which increasingly contributes to the development of common civilization diseases. The aim of the current dissertation project is to investigate the cardiovascular fitness in males with cervical spinal cord injury (n=20) as compared to able- bodied males (n=27). Both groups completed exercise testing on an arm-crank ergometer. Arterial blood pressure response to exercise, peak oxygen consumption and peak heart rate were the primary outcome variables. In the first part of the study, a graded maximal arm- crank ergometer test to the subjective exhaustion was performed for the inter-group peak exercise comparison. The peak power dramatically differs between the groups and could be an important confounding factor limiting the evaluation of a physiologic response related to the equivalent physical loading. Therefore, in the second part of the study, individuals of the control group completed a second graded arm-crank ergometer...

In my master's tehsis I'm dealin with the methods used for non-invasive blood pressure measurement. For realization of a virtual blood pressure meter in LabVEW I have chosen the oscillometric method. Algorithm determining systolic and diastolic blood pressure is based on the relatively easy detection of maximum amplitude oscillations (corresponds with a mean arterial pressure), when thelimiting valuesof blood pressure are in a specific ratio with a maximum amplitude of oscillation. In LabVIEW was solved loading of signal from the measure card and processing pressure curve into a form suitable for the detection of the peak oscillations. The program calculates the limits of arterial pressure and mean heart rate too. Linking the virtual device with the blood pressure sensor Vernier BPS-BTA then makes up komplex for capturing the blood pressure via oscillatory method.

The aim oftbe work was to get concrete and objective view of the movement of defined parts in lumbar spine during postural task. The other goal was to measure respiratory muscle strenght a find if there was a connection between measured parameters. 35 subjects with chronic low back pain and 25 asymptomatic subjects underwent dynamic MRl examination and measurement of maximal mouth pressures. This study showed lower valu es of Pimax and displacement of vertebra Ll in group of patients. AIso showed correlation between Pimax and Ll dispalcement, sacrum displacement and the sacral slope difference during postural task in group of patients. No significant correlations in control group were found. Powered by TCPDF (www.tcpdf.org)