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Electromagnetic field mapping in biological tissues
Bereznanin, Martin ; Dlouhý, Jiří (referee) ; Rozman, Jiří (advisor)
The main objective of this study is to learn about the theory of electromagnetic field and to create a model of propagation of ultra short waves in a biological tissue. Next point of this paper is to determine a specific absorption rate (SAR) using a valid sanitary standard. A particular model solution was realized in a model environment of the program Comsol Multiphysics 3.5. A human head and a cellular phone with an intern antenna were successfully created in this model environment. First of all were entered appropriate parameters which led to a successful representation of the distribution of electric field intensity. A value of specific absorption rate taken by a biological tissue was determined in the next step. This value was compared to the value listed in a valid sanitary standard to prevent its overrun. A development of a temperature in a biological tissue was determined as well, according to a six minutes long interval stated in a valid sanitary standard.
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Image recording by video camera (PAL)
Tomaštík, Roman ; Dlouhý, Jiří (referee) ; Švrček, Martin (advisor)
The main topic of this work is focused on a connection of a camera with PC and processing of the gained pictures. There are described basic concepts of image processing and coding standards of the color signal. Attention is devoted mainly to PAL system, which is used by our camera. Furthermore, there are summarized and described the basic methods for image processing (thresholding, averaging, convolution, etc.). These methods are also used for the detection of the fundamental position of the eyes. This detection is designed to be the most universal and applicable on the various images obtained.
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Wireless Messaging System
Musil, Tomáš ; Dlouhý, Jiří (referee) ; Sekora, Jiří (advisor)
The aim of thesis is a design of wireless pager, that can be used for short text messages transmission from the sender to a particular recipient. The report is sent from a computer via serial port. The application is based on microcontrollers, which provide data protection, evaluation and display data on the display of the receiver. The wireless transmission is effected via the RF modules, that are powered from batteries.
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Patient data trasfer over GSM
Pavliš, Jaroslav ; Dlouhý, Jiří (referee) ; Švrček, Martin (advisor)
This diploma thesis is concerned with possibilities of patient data transfer from a pacemaker or implantable cardioverter-defibrillator to physician over GSM. Theoretical part describes options of data transfer in GSM networks, data appropriate for sending and a structure of message is proposed. A device, that is able to send medical data in a form of SMS messages is designed and constructed. The device uses a Freescale MC68HC908GP32 microcontroller, character display with a Hitachi HD44780 controller and a cell phone Sony CMD-J70. The program for microcontroller is written in assembler for HC08. For tabular view of received messages, an application software for PC was created.
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The heartbeat counter
Malínský, Zdeněk ; Dlouhý, Jiří (referee) ; Švrček, Martin (advisor)
Heart rate variability belongs to basic and most frequently interpretation of physiologic statement in medicine. The pulse rate serves as an indicator of the heart activity. The subject of this diploma thesis is projection of the heartbeat counter. The work describes electrocardiograph and separated waves, ways of calculation heart rate, characteristics mechanism for measuring and other necessary information about heart rate measuring. This master thesis fixates on heart rate-calculation from including R-R intervals. Here is described whole project of heartbeat counter, properties of separated blocks and calculation of useful parameters. Further there is noted software resolution for the microcontroller and program for the calculation of heart rate frequency including unwinding signal preprocessing and detection of separated QRS complexes. The products of this diploma thesis are the circuit including the board circuit and codes of separated programs.
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The Analysis of Care for the Employees in an XY company
Smělá, Šárka ; Palíšková, Marcela (advisor) ; Dlouhý, Jiří (referee)
Bachelor thesis is focused on analysing the care of the employees in an XY company. The main objective is to identify the strengths and weaknesses of its working system. To achieve the goal, it is used a questionnaire survey that is supplemented by personal interviews with some employees. The benefit of this work is to suggest recommendations from the findings that could lead to a more efficient system of care for the employees. The first part defines theoretical concepts related to the issue. Furthermore, these findings are used as a basis for the practical part, where we can reach the analysis of existing system of care for employees in this company. In conclusion, the results are evaluated along with the recommendations that could lead to higher employee satisfaction.
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