National Repository of Grey Literature 2,945 records found  beginprevious21 - 30nextend  jump to record: Search took 0.17 seconds. 

Escape behavior of roe deer
Waignerová, Pavla ; Obleser, Petr (advisor) ; Adámková, Jana (referee)
The work deals with the way of life of our most common game, especially roe deer and escape behaviour and strategies of escape. The observation was focused on the perception of the Earth's magnetic field roe deer. Which in this work due to lack of data did not. Other observations dealt with the response to an incoming man in connection with the perception of colour and intensity of light. Breakout and the reaction distance proved to be dependent on the colour of clothing and on the intensity of the illumination, the reaction and the escape came earlier, when an observer was dressed in a red dress, than when he was in the green. And at a higher intensity of daylight responded beasts before when light intensity was lower. The results of the experimental part of the work did not confirm the hypothesis of similar scientific works dealing with the magnetoreception and the visual perception of the roe deer.

Comparison of spruce sawflies of the genus Pristiphora in the mountains after 10 years
Englártová, Šárka ; Holuša, Jaroslav (advisor) ; Lukášová, Karolína (referee)
The presence of sawfly Pristiphora was observed in mountain areas in 2015, particularly in Beskydy (Bařiny), Šumava (Královský Hvozd) and Krušné hory (Klínovec). Observation was carried out in there mentioned areas in young spruce stands.Sawflies were cathed help by Malaise trap. Locations were controled every 14 days from April to July 2015. Sawflies were categorized into species and then by gender. At the end results were obtained by statistic program, which confirmed close dependance between flying activity of sawflies and spruce sprouting.

The effect of the dog-asissted activity in children disorders of psychological development during education
Schwarzová, Kristýna ; Chaloupková, Helena (advisor) ; Katerina, Katerina (referee)
The goal of the thesis was to find out if dog´s presence and the targeted work of a child with a dog helps improve children´s attention to teaching and their results. The majority of academic literature shows that dog assisted therapy constitutes a clear benefit for children. However, the research on this topic is still in its infancy and the literature is still relatively limited. The thesis deals with the interactions of a child and a dog, especially in the case of children with attention deficit hyperactivity disorder (ADHD), specific learning disorders (SPU), and autistic spectrum disorders (PAS). The general conclusion of the existing literature is that animal assisted therapy with the dog helps children with ADHD improve their fine motor skills, increases their attention, decreases aggressiveness, and helps to improve speech disorders. But it is not clear what the impact on other types of disorders is. This thesis first focuses on reviewing the existing literature and its main results that mostly confirm the positive influence of involving the dog in therapy by all observed disorders. The second part of the thesis deals with experimental verification of the hypothesis of a positive influence the dog´s presence and the targeted work of 8 children in the age of 7-9 years from a special school has on attention and behavior in the classroom. Four of the children were diagnosed with ADHD, two with SPU, and two with an autistic spectrum disorder. The experiment was carried out two times a week, and focused on observing the extent of children´s concentration on the given task, calming down, attention while solving the assignments, and reduction of negative physical contacts among observed subjects. The data collection took place during regular classes. Once in a week, the class was preceded by the animal assisted therapy with the dog, which formed the treatment group. The second session in the week was not preceded by any therapy to establish the control group for the experiment. The results verify our hypothesis by revealing the strengthening of the positive influence of teaching on the observed skills of the children. The positive influence of the dog is supported by the fact that the children achieved more success in its presence. However, further research on larger samples and children from other age categories is needed.

Comparison of the lepidopteran fauna of selected protected areas in CR
Eichlerová, Barbora ; Vrabec, Vladimír (advisor) ; Kamil, Kamil (referee)
This master thesis is focused on butterfly research and their characteristic in three different regions in Czech republic. These regions were Čertova zeď, Suché skály and an area called Swamp. Inventory research was focused on butterflies encompassing the whole order (Lepidoptera), The research was done using recommanded methods coming from standard entomology practice. Suché skály and Čertova zeď are predominantly forested enviroments with sandstone rocks, which are sought after by turists. In contrast, Swamp area is marshy. Sampling of butterflies had two stages. Diurnal butterflies were observed during walking rounds (First stage), however since it took place in areas with low occurrence of meadow ecosystems, only a small number of butterflies were observed. Sampling of the nocturnal butterflies (Second stage) took place during late night hours. 124 species of butterfly were found in Čertova zeď national park, using inventory research. None of these species are mentioned in the Red list of endangered species, nor in the list of specially protected species. In the area of Suché sklály 98 species were found, belonging to 20 families, where only one of them is specially protected Papilio machaon (Linnaeus, 1758). In the last area Swamp, 170 species was found, whereas 8 of them belong to the Red list : Acronicta menyanthidis (Esper, 1798) .Arichanna melanaria (Linnaeus, 1758), Callopistria juventina (Stoll, 1782) ,Coscinia cribraria (Linnaeus, 1758), Drymonia obliterata (Esper, 1758), Eugraphe subrosea (Stephens, 1829), Hyles galii (Rottemburg, 1775) and Lithosia quadra (Linnaeus, 1758). Tested hypothesis was that higher diversity of butterfly species is in areas with higher plant diversity. This hypothesis was confirmed.

Seasonal rhythms and hibernation of European turtles as a problem for their breeders
Tocauerová, Štěpánka ; Vrabec, Vladimír (advisor) ; Vejtrubová, Markéta (referee)
The thesis is focused on the seasonal activity of the European terrestrial turtles, which can be kept in captivity.The following species have been dealt with: Testudo hermanni, Testudo graeca, Testudo marginata and Testudo horsfieldii. The analysis was supposed to confirm the hypothesis that the species that lives that the turtle species living in the north is also the species with the least requirements when it comes to the microclimatic conditions. The first chapter deals with the characteristics of these species. Both their Czech and Latin name is listed, the most famous subspecies classified, so are the most famous subspecies, the area where they occur is described and their appearance, including the typical features, what they feed on, how they reproduce, what conditions they require if they are to be bred and how endangered they are. The next part deals with the seasonal rhythms of the turtles. The year is divided into several seasons or phases, i. e. the post-hibernation phase, spring, summer, pre-hibernation phase and hibernation. In each phase there is a description of both the active and passive behaviour of the turtle and of the way this behaviour is influenced by the time of sunshine, air temperature, rainfall or other factors. Examples of specific turtle behaviour that has been observed in different areas of the Mediterranean Sea, where they can be observed in the nature are given. What follows is a general characteristics of the hibernation and estivation and an explanation of the difference between the two. The next chapter deals with the conditions for the turtle hibernation as a part of the breeding process, such as the preparation of the turtles for the hibernation and the ways to help them do so safely in our country. Some of the turtle keepers' opinions on this important subject, the right way of hibernation can influence other important physiological processes of the turtles are mentioned. Then the recommended conditions for turtle breeding in our country are described. The final chapter is charted information about the chosen turtle species ( the size of the shell, the height above the sea level in which they occurr, whether they hibernate or estivate and whether they are listed in the Red Book of Endangered Species and the CITES lists. The analysis of the informaton that has been collected shows that the hypothesis that was formulated in the beginning of the thesis can be almost confirmed and that the Testudo hermanni seems to be species that is the easiest to breed indeed.

Comparison of spruce sawflies Pikonema scutellatum in the Czech Republic after 10 years
Pešek, Marcel ; Lukášová, Karolína (advisor) ; Holuša, Jaroslav (referee)
Pikonema scutellatum is a species with high outbreak potential, which caused local outbreaks in several areas in Europe during the 20th century. Within our research we observed an abundance of the spruce sawflies P. scutellatum at 10 predetermined locations around the Czech Republic in 2015. We used Malaise traps of Towness (1972) type for catching adults from late April to late June. P. scutellatum was detected in 9 of 10 sites with a total of 55 individuals. Which is lower than the previous collecting period in years 1999-2006, but it was not statistically confirmed (Kruskal Wallis test; p>0,05). There was more males then females but this also was not statistically confirmed (Wilcoxon matched pairs test; p>0,05). The flight activity period of P. scutellatum started in May and during June declined significantly. Population densities of observed species are very low and the population is in the latent phase.

The incidence of postpartum diseases - ketosis, acidosis, depending on which condition and structure of the of rations in transition
Bubnová, Zuzana ; Hučko, Boris (advisor) ; Jiří, Jiří (referee)
This thesis formed on the observation of the influence of body condition score (BCS) before calving on the prevalence of ketosis after calving and the structure of mixed ration on prevalence of rumen acidosis in production herd. This thesis was made on the farm AGROBOS Ltd. in Slatina where 165 cows are raised. 25 cows and 10 heifers were assessed in dry period and whole herd of dairy cows in the production hall was monitored for performance (PM). Body condition score of cows and heifers was assessed in the period before calving on a five point scale with resolution of 0.25 points. Blood samples were taken from them from the base of the tail after calving. The concentration of betahydroxybutyrate (BHB) was monitored in blood at first to fourth days after calving using FreeStyle Optimum NEO. The structure of mixed ration in the production hall was evaluated using Penn State separator. The fat protein ratio from the PM system MOOML was observed and evaluated for incidence of chronic rumen acidosis. The measured values of BHB, the structure of the diet and the fat - protein ratio values were compared with the recommended values. As a criterium for a healthy state, the BHB concentration of 1.4 mmol / l was selected. The rumen acidosis limit for the fat protein ratio was set at 1.1. A lower fat protein ration was designated as ruminal acidosis. The suggested ration amounts for cows have been adjusted based on a grain mixture which was separately administered to dairy farms by the milking robot. Ketosis was detected in 83 % of cows on the second or higher lactation of which 9.5 % had higher condition before calving, so 3.75 point or higher. All evaluated heifers suffered ketosis after calving and 70 % had elevated condition before calving. The structure of the mixed ration had the highest deviations in proportions of large particles on upper sieve of separator. Up to 50 % of the particles for a mesh size of 19 mm were found. The average fat protein ratio was 1.12 in the whole herd. Cows, which was measured for BHB and subsequently monitored in performance during first lactation, had in the first period the average proportion of fat - protein ratio of 1.09, suggesting that the heifers on average suffered from ruminal acidosis in early lactation. Cows at second and higher lactation had in the first month of performance the average ratio of fat and protein of 1.17. Measured values: BCS and BHB; F/P and structure of mixed ration were statistically evaluated using correlation. But we have not confirmed of dependence on one production illness.

Influence of growth stimulators on physiological characteristics by hops plants (""Humulus lupulus"" L.)
Bazika, Václav ; Hnilička, František (advisor) ; Josef, Josef (referee)
At growing Saaz variety is the target to reach the highest yield of hop´s cones and high content of alpha acids. The average content of this acids in Saaz variety is in the range from 2,5 to 4,5 %. The growers effort is to reach the higher number of this range because the final selling price is given by content of alpha acids. During the active growth of hops, grower can targeted stimulate the hops to positively affect the physiological processes. Then he can reach better yield of valuable alpha acids and that´s why the target of this diploma thesis was to fix the influence of growth stimulators on physiological processes on the yield of hop´s cones and the yield of alpha acids. And based on the results to identify the suitability of using growth stimulators during the intense hops growing. Following scientific hypothesis were designed: determine the plants reaction diversity on growth stimulator. For reaching the targets and confirm or reject the hypothesis was observed in natural conditions nearby the Chrastany region the plants of Saaz (clone 72) in interaction with the usage of growth stimulators. These stimulators were used: Humastar, Fertileader Vital, Lignoaktivátor. There were four variants: controled with no aplication and three other variants with usage of growth stimulators (for each variant were apllied only one stimulator for three times). The influence of growth stimulators on hops plants (phase BBCH from 37 to 81) was observed on the basis of the rate of gas exchanges, chlorophyl fluorescence and the leaves chlorophyl content, which were measured by infrared gas analyzer LCpro+ (ADC BioScientific Ltd. Hoddesdon, Great Britain), OS 1-FL (OPTI SCIENCES), Chlorofyl CCM 200 ADC BioScientific Ltd. Hoddesdon, Great Britain) After the crop was evaluated the yield of hop´s cones and the content of alpha acids, beta acids and essentials oils. The results of measurment indicates that the highest average transpiration rate was observed after Humastar application (+18,3 % against control variant). In the control variant was found the lowest average transpiration rate from all variants. The highest photosynthesis rate was found after Fertileader Vital application (+7 % against control variant). Decrease of photosynthesis rate about 17 % against the control variant was observed after Humastar application. The differences was also observed in chlorophyll fluorescence. The highest Fv/Fm value reached the hop´s plants after Fertileader Vital application, concretely 0,792. On the other hand the lowest Fv/Fm value was observed after Lignoaktivátor application (0,780). After the application of all tested growth stimulators were reached increase of a pigment´s content in hop´s leaves against the control variant. The highest content of pigments were observed after Fertileader Vital application (+19,2 % against control variant). Control variant reached the average content of pigments in hop´s leaves 25,5 chlorophyll units. Differences after the growth stimulation was also observed in yield and quality of dry hop´s cones. The highest yield reached the Lignoaktivátor variant (0,73 t/ha). This is an increase of 17,7 % against the control variant (0,62 t/ha). The yield of hop´s cones was decreased of 8,1 % against the control variant after Humastar application. The similiar trends were also observed in hop´s cones quality. The highest content of alpha acids (3,06 %) was reached after Lignoaktivátor application and at the same time Lignoaktivátor variant also achieved the highest content of essentials oils per 100 g of a sample (0,22 ml). Humastar variant had the lowest content of alpha acids (2,18 %) and also the lowest content of essential oils (0,14 ml). Based on the results it can be stated that the used growth stimulators had the influence on the physiological characteristics of hop´s plants and also affected the different yield and quality of hop´s cones. Proposed hypothesis were confirmed. Based on the one-year results, application of Fertileader Vital or Lignoaktivátor seems to bee more profitable than Humastar application.

The use of inovative sorbents for immobilization of Zn in soil
Řečínská, Magdalena ; Vítková, Martina (advisor) ; Zdeňka, Zdeňka (referee)
Amorphous manganese oxide has been already successfully tested as an efficient amendment for limiting the mobile fraction of risk elements in soil. However, its application is accompanied with an unsolicited phenomenon of increased dissolution of this agent related to oxidation of soil organic matter. For that reason, surface modification of the studied Mn oxide with the layer of MnCO3 has been proposed (Sm-AMO). The subject of this thesis is to assess the effectiveness of chemical stabilization of two contaminated soils using Sm-AMO with a focus on Zn and to verify the stability Sm-AMO based on laboratory experiments. The results of preliminary stability testing of both materials in demineralized water confirmed that Sm-AMO is less soluble than the original AMO. However, this fact was not confirmed by the results of testing of AMO and Sm-AMO performed using pH-static leaching experiments, when no differences were observed between AMO and Sm-AMO stability based statistical analysis, except for the natural pH (6.03) in the Litavka soil (soil L). Both sorbents yielded greater stability with increasing pH. Adsorption kinetics of Pb, Zn, Cd and As, which are present in the tested soils, onto AMO and Sm-AMO was studied to compare the adsorption properties of both materials. Affinity of these metals was generally higher towards AMO, but the recorded equilibrium time was similar for both sorbents. The results of adsorption kinetics for both materials tested showed the highest sorption rate and the highest adsorbed amount for Pb and the lowest for Zn. Similar results were also observed at pH-static leaching experiment. Stabilization effectiveness of Sm-AMO compared to AMO was mainly demonstrated for Pb and As under natural pH conditions (pH 6,03 and 6,43) of Litavka and Smolotely soils. Considering the stabilization of Zn statistically significant stabilizing effect of AMO/Sm-AMO was observed only at pH 8, when the AMO showed to be more effective. The effectiveness of Sm-AMO for the immobilization of Zn was not as significant as expected, but compared with other immobilization amendments Sm-AMO is an effective sorbent for Zn stabilization.

Fractions in elementary mathematics education : some observations
Tichá, Marie
The article focuses on issues related to the creation of the concept of fraction. Various interpretations and representations are mentioned. Shown are some of the misconceptions and common mistakes of students in solving problems and deficiencies in training, which are their cause.