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Lowcost autonomous electrical energy source
Fojtlín, Branislav ; Drexler, Petr (referee) ; Jirků, Tomáš (advisor)
The aim of my bachelor’s work is a low-cost autonomous generator of electrical energy. Since the offer on the market for photovoltaic systems is now very wide, it is my task to select a cheap and effective solution for solar energy generator that will provide three different levels of voltage on the output. I focus especially on the overview of the types of photovoltaic cells and comparison of cells producers. This work also describes switching converters, which will be used for the output voltage conversion for the target system. In the work the solution by different DC/DC regulators is described.
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Optimization of the active load of the source with dynamic output parameters
Halama, Petr ; Steinbauer, Miloslav (referee) ; Jirků, Tomáš (advisor)
This bachelor’s thesis deals with Power Factor Correction circuit, meant for the adjustment of the non-linear power source. Usually the PFC is designed for the power levels in the range of tens of Watts and more. New circuit will work at the power levels of maximally 1 W. Such control algorithm was designed, that the circuit represents the constant real load for an energy source. In the beginning of the work the Step-up converter topology was chosen as the best for next solution. More active PFC types were reviewed with the help of PSPICE simulator. In the next part of this project two of the analyzed circuits were implemented. Basic PFC for the demonstration of its principle and the half-bridge topology, which was selected on the basis of the analysis results.
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Use of time in training the 3th grade
Jirků, Tomáš ; Arnošt, Pavel (advisor) ; Vojta, Zdeněk (referee)
Title: Use of time in training the 3th grade Objectives of work: To find out use of time in training the 3th grade of czech teams and compare them with theoretical knowledge, which recommend ČSLH and USA hockey. Methods: Data were collected using the method of indirect observation. During our visits to selected clubs we made the video, which served us as a source of information and data for this work. Tested object represents 4 clubs in the Czech republic. The data from the video were processed into the charts, graphs created and the results compared. Results: In all four tested clubs players are actively in training unit over 25 % of the training time. Mountfield Hradec Králové and BK Mladá Boleslav join his players in training unit more than 50 % time of training. HC Stadion Vrchlabí waste time 12,1 % of training time, Mountfield Hradec Králové 12,8 %, Bílí Tygři Liberec a BK Mladá Boleslav over 25 % time of training. Skating and individual skills train in all tested clubs with the exception of Mladá Boleslav over 60 % training time. Three clubs applies small- area games over 30 % time of training. Only club HC Stadion Vrchlabí used these games in 17,5 % training time. Keywords: Ice hockey, time, training unit, 3th grade
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The content of training the 4th grade and its continuity with the modern trends in ice hockey
Jirků, Tomáš ; Šťastný, Petr (advisor) ; Arnošt, Pavel (referee)
Title: The content of training the 4th grade and its continuity with the modern trends in ice hockey Objectives of work: To find out representation of individual play moves in the training units of 4th grade in the Czech republic and compare them with the modern trends, that recommend USA hockey and IIHF. Methods: For data collection was used method of direct observation and recording of training units into the prepared evaluation reports. Tested object represents 3 training units of 4th grade in 3 different clubs in the Czech republic during the season 2013/2014. The data were processed, filled into the charts and compared. Results: In all 3 clubs used the skating drills over 30% of training time, HC Sparta Praha train skating even over 50%. Stickhandling train in 2 clubs over 20% of training time, in 1tested club below 20%. Passing drilss apply in the club HC Hvězda Praha above 20% time of training, HC Krkonoše above 16% and HC Sparta Praha below 10%. HC Sparta Praha use the shooting drills most of the time and its over 37%, 2 other clubs below 20%. Any of the tested teams does not apply small - area games above 30% of training time. In all 3 tested clubs used stations. HC Hvězda Praha and HC Krkonoše used 3 stations during 1 training drill and HC Sparta Praha 2 stations. Keywords: Individual...
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Lowcost autonomous electrical energy source
Fojtlín, Branislav ; Drexler, Petr (referee) ; Jirků, Tomáš (advisor)
The aim of my bachelor’s work is a low-cost autonomous generator of electrical energy. Since the offer on the market for photovoltaic systems is now very wide, it is my task to select a cheap and effective solution for solar energy generator that will provide three different levels of voltage on the output. I focus especially on the overview of the types of photovoltaic cells and comparison of cells producers. This work also describes switching converters, which will be used for the output voltage conversion for the target system. In the work the solution by different DC/DC regulators is described.
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Optimization of the active load of the source with dynamic output parameters
Halama, Petr ; Steinbauer, Miloslav (referee) ; Jirků, Tomáš (advisor)
This bachelor’s thesis deals with Power Factor Correction circuit, meant for the adjustment of the non-linear power source. Usually the PFC is designed for the power levels in the range of tens of Watts and more. New circuit will work at the power levels of maximally 1 W. Such control algorithm was designed, that the circuit represents the constant real load for an energy source. In the beginning of the work the Step-up converter topology was chosen as the best for next solution. More active PFC types were reviewed with the help of PSPICE simulator. In the next part of this project two of the analyzed circuits were implemented. Basic PFC for the demonstration of its principle and the half-bridge topology, which was selected on the basis of the analysis results.
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The role of the medical operations center, a provider of emergency medical services
JIRKŮ, Tomáš
Bachelor's thesis deals with the medical operating center and its activities. A lot of people have no idea what a medical operating centre actually is. My knowledge about it was also scarce before the beginning of my studies. Therefore I would like to outline the problems, tasks and also the demanding character of the work of operators. That is why this thesis is aimed at examining the tasks of the medical operating centre. Everybody probably knows the term medical rescue service and imagines immediately a yellow vehicle with reflective strips and blue lights. Hardly anybody realizes, however, that the medical rescue service needs the medical operating centre to be functional. It may be also called a control centre. This centre is an inseparable part of the medical service and also of the integrated rescue system. Specialized medical workers, called operators or controllers, are employed here. These workers, among others, receive continuously emergency calls, evaluate them and pass them on to exit groups, and, last but not least, assist the caller with giving first aid. All these problems are the subject of the theoretical part of the thesis. Two research issues were determined for the purpose of the research part of the thesis. The first one deals with all tasks ordered by legislation being used by the operating centre and the second research issue is aimed at the problems of urgent basic life support assisted by phone, namely if this basic life support assisted by phone is utilized always when unconsciousness is indicated. These issues were dealt with by means of the qualitative research method consisting in the secondary data analysis. The research set constituted the regional operating centre of the South Moravian Region. Specifically, documentation of emergency medical services was used operator record and audio record of emergency call. This documentation is a part of each emergency call. By means of the secondary analysis the data from 20 emergency calls were obtained. Emergency calls were chosen by simple random choice. The sample of these 20 emergency calls was chosen from the period of the year 2014. Because of protection of personal data no names are given in the thesis, only the initials. For the same reason no actual addresses are used in the research. In the discussion there are given all tasks ordered by legislation and recommended procedures from professional sources. This information is subsequently compared with the obtained data. The results in the case of the first research issue indicated that some tasks ordered by legislation are not used too often. Some tasks within the framework of the small sample being examined are not used at all and, on the contrary, they are used in the receiving of each emergency call. The tasks that were not used at all were three altogether. The results in the case of the second research issue demonstrated that indication of unconsciousness is not always necessarily the reason for using urgent basic life support assisted by phone. It is important that also other aspects are taken into account, not only consciousness of the patient. Of ten emergency calls concerning unconsciousness being examined this urgent basic life support assisted by phone was used in five of them. It was found out that utilization of the medical operations center tasks is individual in each emergency call. From the point of view of the total activity of the centre it could be declared, however, that the centre uses most of the tasks ordered by legislation. This bachelor's thesis can be used as a material extending the knowledge of both non-professional public and medical personnel concerning the activities of medical operating centre. It can be a stepping stone for further research concerning medical operations center.
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