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Heat transfer on sprinkled tube bundle
Copek, Tomáš ; Pospíšil, Jiří (referee) ; Kracík, Petr (advisor)
This bachelor thesis named Heat transfer on sprinkled tube bundle deals with experimental assesment of heat transfer coefficient on sprikled tube bundle. Its goal is to measure, compare and evaluate values and trends of heat transfer coefficient on external surface according to flow rate of cooling water. Evaluation will be focused on size of pitch between tubes, type of tubes surface and influence of temperature gradient. Measurement was ongoing at atmospheric pressure. Warm water flowing in tube bundle is cooled by cold sprinkling water. Tube bundle consists of ten tubes located horizontaly beneath each other with smooth, grooved or sanblasted surface. Distance between tubes vary from 15 to 35 milimetres. Measurement of two temperature gradients 15-40 and 15-45 (15°C is temperature of sprinkling water in distribution tube; 40°C or 45°C is temperature of water entering the tube bundle) is carried out for each pitch and tube surface.
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The effect of active recovery and hydroterapy on the subsequent short-term and medium-term muscular performance
Strejcová, Barbora ; Süss, Vladimír (advisor) ; Pavlů, Dagmar (referee) ; Pyšný, Ladislav (referee)
Title: The effect of active recovery and hydroterapy on the subsequent short-term and medium-term muscular performance Objective: The aim of the study was to compare the effect of two recoveries (ice pack, passive recovery) on the subsequent short-term and three recoveries (active recovery, cold water immersion, passive recovery) on the medium-term knee strength in the extension and flexion. Methods: Fourteen athletes in an average age of 26,6±4,4 years performed, in a random cross-over design, 2 sessions with 5 repeated short-term isokinetic tests and 3 sessions with 3 repeated medium-term isokinetic tests. The effect of ice packs and passive rest and the effect of active recovery, passive rest and cold water immersion were assessed by the 5x2 (time x recovery) and 3x3 (time x recovery) repeated-measure ANOVA, respectively. Results: The ice packs did not have any effect on peak torque, total work and average power during short-term performances. The average heart rate was significantly lower during measurements with the ice packs than during the passive recovery (125±15 vs. 135±20 tepů. min-1 ). We stated significantly lower changes in knee extension for the peak torque after the active recovery (↑ 0,9 N.m) than after the cold water immersion (↓ 14,6 N.m) or the passive recovery (↓ 13,9 N.m). The...
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Pressure Sensors Based on Modern Nanotechnologies
Magát, Martin ; Hudec, Lubomír (referee) ; Vlach, Radek (referee) ; Vrba, Radimír (advisor)
This thesis describes utilization of a nanotechnology in new pressure sensors. Detailed analysis of individual principles are carrying on. And simulations and experimental models of sensors are developed. More detailed description is provided for new capacitive pressure sensor, which is manufactured using nanotechnology, including its model and analysis in order to improve its properties. The work deals with the emission pressure sensor which uses the principle of cold emissions, including analysis comparison of the measured values of the emission current from the applied nanotubes field and analysis to improve emissions performance.
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NATO enlargements in 1999 and 2004 - on the examples of eligibility of the Czech Republic, Hungary, Slovakia and Estonia for NATO accession
Žíla, Erik ; Přikryl, Pavel (advisor) ; Karásek, Tomáš (referee)
The thesis deals with NATO enlargements in 1999 and 2004 - on the examples of eligibility of the Czech Republic, Hungary, Slovakia and Estonia for NATO accession. The thesis is divided into the four parts, which are analysing the issue of enlargement. This issue is viewed from a broad perspective. That's why the thesis includes the NATO enlargements during the Cold Ward. Nevertheless, the main focus is on the two enlargements waves, such as 1999 and 2004, which comprise the accession of these four mentioned states. Simultaneously, none of these would be accepted without the US approval and especially in case of Estonia also without Russian opinion. Then it could follow the in-depth analysis of eligibility of the Czech Republic, Hungary, Slovakia and Estonia for NATO accession, which is based on Study on NATO Enlargement. The Study can be legitimately regarded as NATO's basic document for enlargement.
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Air condition of bank
Josef, Michal ; Rubinová, Olga (referee) ; Uher, Pavel (advisor)
This work is focused on designing an air conditionning system for bank so as to meet functional, hygienic, architectural and operational requirements for microclimate of officer building. The main tasks of the device are covering heat gain of area of the bank in the summer and transportation of fresh air into the room. The system is also designed to cover the winter heat gains. The theoretical part is about the production of cold water for cooling buldings and the practical part contains two desings of ventilation and air conditioning system for bank. The result of this work is detailed design work for two air conditioning equipments for specified object.
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The influence of physical exercises on pregnant women on the development of labour
JEŽKOVÁ, Jana
My work deals with the topic of ``Influence of Physical Exercises during Pregnancy on the Course of the Labour{\crqq}. I decided to explore this subject when I visited a course for pregnant women. I enjoyed the lecture I attended and I was interested whether the time and efforts that the women spent on the exercises were truly worth it. Already in the Antiquity and in the Early Middle Ages people took interest in health of pregnant women and their preparation for the labour. Doctors recommended to them relaxing more, best in lying positions, and bathing in hot water, and they forbade them to bathe in cold water. Based on those recommendations we can see that today{\crq}s psycho-prophylactic preparation of pregnant women has deep roots already in the old times of the Antiquity. The main objective of physical exercises in pregnancy is a good physical and mental condition. The labour and the actual pregnancy are very demanding in terms of the physical and mental fitness, and therefore it is good to be prepared for it. Proper physical exercises help women manage the increased demands on their organisms during the pregnancy, and after the labour it helps them with easier and quicker return to their body weight before the pregnancy. The exercises especially designed for pregnant women prepare them for the labour so that it was as easy for them as possible and did not exhaust them more than it was necessary. Whether the exercise is suitable for the woman or not must be assessed by her doctor on individual basis and based on the current health condition of the woman and her foetus, on the length of pregnancy, physical condition of the woman etc. The goal of this work was to find out whether the physical exercises during the pregnancy truly influence the course of the physiological labour. In order to collect all information I carried out a quantitative research in the form of a questionnaire and I also applied information regarding the length of the labour I had acquired from the medical documentation of women after their physiological labour hospitalized in the lying-in clinic. Before I launched the research I had established a hypothesis that women who had underwent any kind of physical exercises during their pregnancy had faster course of the labour than those who had not attended any such courses. A more significant difference in the length of the labour has been recorded only in case of multiparas who had not done any physical exercises during their pregnancy. The research showed that women (multiparas) who attended any course for pregnant women during their pregnancy have shorter labour approximately by 49 minutes than those women (multiparas) who did not do any exercises. This work could help midwives who lead antenatal courses for pregnant women as part of their primary care. The information could be also provided to the medical staff who meet pregnant women in their practice (for instance in gynaecological departments) and who could deliver the information to them.
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Jet Production in p+p and d+Au Collisions √sNN = 200 GeV in STAR
Kapitán, Jan ; Šumbera, Michal (advisor) ; Chýla, Jiří (referee) ; Dolejší, Jiří (referee)
Title: Jet production in p+p and d+Au collisions at √ sNN = 200 GeV in STAR Author: Jan Kapitán Affiliation: Nuclear Physics Institute AS CR Supervisor: doc. Michal Šumbera, CSc., DSc., Nuclear Physics Institute AS CR Abstract: The aim of this work is to measure the effects of cold nuclear matter on jet production in √ sNN = 200 GeV d+Au collisions at Relativistic Heavy Ion Collider (RHIC). After a brief theoretical introduction and description of the experimental setup, jet analysis and the required corrections are described. The jets are reconstructed in p+p and d+Au collisions recorded by the STAR experiment using the anti − kT jet algorithm. Inclusive jet pT spectra in d+Au collisions and their centrality dependence are compared to the reference measurement in p+p collisions and to the binary collision scaling. Di-jet correlations are studied in p+p and most central d+Au collisions to measure the kT effect and its possible nuclear broadening. These results will also be used as a baseline measurement for ongoing studies of jet production in heavy-ion collisions at RHIC. Keywords: jets, d+Au collisions, cold nuclear matter effects, STAR, RHIC
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Possibilities of integration of the Western Balkans into the EU
Trajkovska, Ljupka ; Klosová, Anna (advisor) ; Dúbravská, Pavla (referee)
The main objective of this thesis is to evaluate the future prospects for membership of the Western Balkan countries in the European Union. Western Balkan includes the following countries: Albania, Bosnia and Herzegovina, Croatia, Kosovo, Macedonia, Montenegro and Serbia. The main objective of the first chapter is to define the mutual relations between the European Union and the Western Balkan countries, according to their past results since the end of the Cold far until present. The second chapter explains the main features of the political and economic situation in the Western Balkans and the enlargement policy of the European Union. Emphasis was put on the Copenhagen criteria and on some of the main components of the Stabilization and Association Process, such as Stabilization and Association Agreements and EU pre-accession assistance to the Western Balkans. The last chapter deals with the future development and the possibilities for membership of the Western Balkan countries in the EU, based on the evaluation of the results which were achieved by the Western Balkan countries according to the latest European Commission progress report.
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Snow water content modelling in small catchments
Němečková, Klára ; Daňhelka, Jan (advisor) ; Bercha, Šimon (referee)
Title: Snow water content modelling in small catchments This work deals with modeling of amount of snow cover, snow water equivalent, respectively, on an experimental catchment in the Jizerské hory Mts. Measuring and modelling of the snow cover is an important part of water management practice from the perspective of reservoir operation and flood management. The first part of this thesis describes physical-geographical characteristics of the Jizerské hory Mts.especially from the climatological and hydrological point of view but also other charakteristics and conditions that may affect the dynamic of snow accumulation and melting are described with detailed focus on the experimental catchment of Černá Desná river - Jezdecká. Two modelling approaches were applied to simulate snow water equivalent (SWE) based on observed precipitation and temperature. Beside the well knowen SNOW17 model a simple method based on heat index was developed in this work and its parameters were calibrated based on measured timeseries of daily average air temperature, daily precipitation and observed SWE for winter periods 2001 to 2009. Both methods provided reasonably accurate estimates of SWE over the tested period, however it was found that the results for winters with extreme conditions (very warm or very cold) are less...
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