The aim of the thesis was to compare the effect of feeding calves with different doses of milk on their health condition, weight and weight increment, consistency of faeces, blood parameters and the effect of plant nutrition. The experiment was carried out with 2 groups of calves (n = 30), the first group (experimental) was fed with 6 liters of milk per day and the second group (control) with 10 liters of milk per day. Calves were fed twice a day and had drinking water and starter all the time. Calves were fed with colostrum within 2 hours of delivery and were on colostrum nutrition for 3 days, the fourth day they were included in the experiment, they were weighed and converted to the milk feed mixture. The second weighing was done at the end of the experiment at the age of 38 days. The third weighing was done at the age of 155 days, when the calves were on plant nutrition. The average birth weight of all calves was 33,5 kg. The final weight was statistically significantly lower in the experimental group, the average final weight was 57.8 kg and in the control group 65.9 kg. The mean total weight increase in the experimental group was 26.4 kg and in the control group 30.3 kg. The intake of starter was statistically significantly higher in the experimental group. The experimental group had a better evaluation of faeces consistency. On the second blood collection, the experimental group had a blood ?-glutamyltransferase level over the reference range, and it was 0,62 µkat/l and the difference between the experimental and control group was statistically demonstrated. Statistically significant was the higher albumin level in the control group at the second blood collection. The results of the experiment clearly do not show a better or worse effect of feeding different doses of milk during the milk diet, higher doses of milk provided higher weight increase during the milk diet, which means higher economic costs.

The thesis objective was to compare the effect of different types of starters on starter intake, growth performance and fermentation in rumen of calves in the period of milk nutrition, and expenses on the starter. The experiment was carried out on Czech Fleckvieh calves (n = 28) housed in outdoor individual boxes and fed by colostrum (until the 5th day of life) or milk compound feed (since the 6th day of life) and starter. The calves were divided into four groups of seven animals each depending on the type of starter they were fed with (A: pelleted starter with oat grains; B: completely pelleted starter, C: textured starter, D: starter with chopped straw). The mean age of calves in each group was determined by their age in the beginning of the experiment and by sex. The experiment lasted in 52nd day of calves age. The mean intake of individual types of starters was relatively balanced thus the differences among groups were statistically insignificant as well as the average daily gain of calves in individual groups. There is substantial evidence that the expenses on consumed starter were the highest in case of the C group. The average rumen fluid pH of most of the calves was oscillating under 6 (with exception of calves in the C group in the first sampling and calves in the D group in the second sampling). In rumen fluid of most calves, quite high levels of propionic acid (over 30% with exception of calves from the D group) and low levels of acetic acid (under 56% with exception of the D group) were measured. Based on the end results of the rumen fluid examination, a disposition to development of subacute ruminal acidosis can be seen in case of calves from groups A, B and C. The pH levels and the levels of propionic acid and acetic acid in rumen fluid of the calves from the D group met the parameters of rumen fluid of healthy animals. Based on the results of the experiment it can be concluded that in terms of health, it is recommendable to opt for the starter with chopped straw, which is the most convenient for the development of rumen fermentation without risk of subacute ruminal acidosis.

The thesis describes ways ejection pinions automotive starter and evaluation of the advantages and disadvantages of each solution. The first chapter deals with the principle of operation of DC motors and starters parameters. In the second part, the individual systems are theoretically discussed in terms of design and their advantages and disadvantages. The third part is focused on the most common system, which is analyzed in terms of mechanical and electrical reliability. The last point of the work is to design an experimental analysis Reach starter pinion.

This thesis aims at automotive starters, their construction, characteristics and problems with starting at low temperatures. There are kinds of starters, function principle, construction, advantages and disadvantages in the first part of thesis. Issues with combustion engine starting and basic technical requirements are also mentioned here; characteristics and importance of starters and combustion engines are also described. Last chapters of this part are dedicated to finite element method and its implication. There are analytical calculations of starter in the second part of thesis. Results are compared with experimental obtained (measured) values and results from RMxprt. Finite element method results are compared, too. Magnetic induction improvement in stator is also suggested.