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Compression of IP Flow Records
Kaščák, Andrej ; Kajan, Michal (referee) ; Žádník, Martin (advisor)
My Master's thesis deals with the problems of flow compression in network devices. Its outcome should alleviate memory consumption of the flows and simplify the processing of network traffic. As an introduction I provide a description of protocols serving for data storage and manipulation, followed by discussion about possibilities of compression methods that are employed nowadays. In the following part there is an in-depth analysis of source data that shows the structure and composition of the data and brings up useful observations, which are later used in the testing of existing compression methods, as well as about their potential and utilization in flow compression. Later on, I venture into the field of lossy compression and basing on the test results a new approach is described, created by means of flow clustering and their subsequent lossy compression. The conclusion contains an evaluation of the possibilities of the method and the final summary of the thesis along with various suggestions for further development of the research.
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Drum Machine for Musicians
Spáčil, Tomáš ; Fedra, Zbyněk (referee) ; Povalač, Aleš (advisor)
The aim of this work is to create a functional prototype of a drum machine with sound generating using a microcontroller. Introduction is devoted to general drum machine and an analysis of its parts, principle and basic modes of operation. The following chapter deals with the principle of digital signal processing and sound generation using a microcontroller. Part of this chapter is focused on mixing using compression methods. The core of this work is to design my own block structure and overall scheme of the drum machine with a description of the parts. Followed by analysis and implementation with theoretical and practical point of view. It is mainly about presentation and description of important parts of firmware codes, DPS design and another technical documentation useful for final prototype production. The conclusion contains a summary of the results with prezentation and discussion.
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Compression of ECG signals recorded using mobile ECG device
Had, Filip ; Vítek, Martin (referee) ; Němcová, Andrea (advisor)
Signal compression is necessary part for ECG scanning, because of relatively big amount of data, which must be transmitted primarily wirelessly for analysis. Because of the wireless sending it is necessary to minimize the amount of data as much as possible. To minimize the amount of data, lossless or lossy compression algorithms are used. This work describes an algorithm SPITH and newly created experimental method, based on PNG, and their testing. This master’s thesis there is also a bank of ECG signals with parallel sensed accelerometer data. In the last part, modification of SPIHT algorithm, which uses accelerometer data, is described and realized.
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A Change in Blood Flow to the Muscle during Compression Therapy
Kuncová, Eliška ; Pavlů, Dagmar (advisor) ; Opatrná Novotná, Irena (referee)
Title: A Change in Blood Flow to the Muscle during Compression Therapy Objectives: The main objective of this work is to determine the change in muscle blood flow during compression therapy, specifically during flossing. Another objective is to get acquainted with compression techniques. Methods: In our work, we used an anamnesty questionnaire to get basic information about probabilities. Flossing was applied to the right shoulder for two minutes. The flow measurement was carried out on Précisé 8008 and the data were evaluated using descriptive statistics, testing using a linear model, an ANOVA and T-test. Results: We found that the development of blood flow to the biceps brachii muscle during and after application is variable. After application of flossing, there are statistically significant changes in blood flow to the upper limb (where flossing was applied) and subsequently, after application, there is an improvement in muscle blood flow (TcpO2). There is also a change in blood flow to the opposite limb (where flossing has not been applied), but this change is statistically significant at the time of the lowest blood flow to the limb where flossing was applied and 15 minutes after the lowest perfusion was measured. Furthermore, flossing was found not to return rapidly to baseline in the upper...
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A Change in Blood Flow to the Muscle during Compression Therapy
Kuncová, Eliška ; Pavlů, Dagmar (advisor) ; Opatrná Novotná, Irena (referee)
Title: A Change in Blood Flow to the Muscle during Compression Therapy Objectives: The main objective of this work is to determine the change in muscle blood flow during compression therapy, specifically during flossing. Another objective is to get acquainted with compression techniques. Methods: In our work, we used an anamnesty questionnaire to get basic information about probabilities. Flossing was applied to the right shoulder for two minutes. The flow measurement was carried out on Précisé 8008 and the data were evaluated using descriptive statistics, testing using a linear model, an ANOVA and T-test. Results: We found that the development of blood flow to the biceps brachii muscle during and after application is variable. After application of flossing, there are statistically significant changes in blood flow to the upper limb (where flossing was applied) and subsequently, after application, there is an improvement in muscle blood flow (TcpO2). There is also a change in blood flow to the opposite limb (where flossing has not been applied), but this change is statistically significant at the time of the lowest blood flow to the limb where flossing was applied and 15 minutes after the lowest perfusion was measured. Furthermore, flossing was found not to return rapidly to baseline in the upper...
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Compression of ECG signals recorded using mobile ECG device
Had, Filip ; Vítek, Martin (referee) ; Němcová, Andrea (advisor)
Signal compression is necessary part for ECG scanning, because of relatively big amount of data, which must be transmitted primarily wirelessly for analysis. Because of the wireless sending it is necessary to minimize the amount of data as much as possible. To minimize the amount of data, lossless or lossy compression algorithms are used. This work describes an algorithm SPITH and newly created experimental method, based on PNG, and their testing. This master’s thesis there is also a bank of ECG signals with parallel sensed accelerometer data. In the last part, modification of SPIHT algorithm, which uses accelerometer data, is described and realized.
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Compression of IP Flow Records
Kaščák, Andrej ; Kajan, Michal (referee) ; Žádník, Martin (advisor)
My Master's thesis deals with the problems of flow compression in network devices. Its outcome should alleviate memory consumption of the flows and simplify the processing of network traffic. As an introduction I provide a description of protocols serving for data storage and manipulation, followed by discussion about possibilities of compression methods that are employed nowadays. In the following part there is an in-depth analysis of source data that shows the structure and composition of the data and brings up useful observations, which are later used in the testing of existing compression methods, as well as about their potential and utilization in flow compression. Later on, I venture into the field of lossy compression and basing on the test results a new approach is described, created by means of flow clustering and their subsequent lossy compression. The conclusion contains an evaluation of the possibilities of the method and the final summary of the thesis along with various suggestions for further development of the research.
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Drum Machine for Musicians
Spáčil, Tomáš ; Fedra, Zbyněk (referee) ; Povalač, Aleš (advisor)
The aim of this work is to create a functional prototype of a drum machine with sound generating using a microcontroller. Introduction is devoted to general drum machine and an analysis of its parts, principle and basic modes of operation. The following chapter deals with the principle of digital signal processing and sound generation using a microcontroller. Part of this chapter is focused on mixing using compression methods. The core of this work is to design my own block structure and overall scheme of the drum machine with a description of the parts. Followed by analysis and implementation with theoretical and practical point of view. It is mainly about presentation and description of important parts of firmware codes, DPS design and another technical documentation useful for final prototype production. The conclusion contains a summary of the results with prezentation and discussion.
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