National Repository of Grey Literature 147 records found  1 - 10nextend  jump to record: Search took 0.01 seconds. 
Active prostetic hand
Brenner, Maximilian ; Sekora, Jiří (referee) ; Harabiš, Vratislav (advisor)
BACKGROUND: Based on mainly vascular diseases and traumatic injuries, around 40,000 upper limb amputations are performed annually worldwide. The affected persons are strongly impaired in their physical abilities by such an intervention. Through myoelectric prostheses, affected persons are able to recover some of their abilities. METHODS: In order to control such prostheses, a system is to be developed by which electromyographic (EMG) measurements on the upper extremities can be carried out. The data obtained in this way should then be processed to recognize different gestures. These EMG measurements are to be performed by means of a suitable microcontroller and afterwards processed and classified by adequate software. Finally, a model or prototype of a hand is to be created, which is controlled by means of the acquired data. RESULTS: The signals from the upper extremities were picked up by four MyoWare sensors and transmitted to a computer via an Arduino Uno microcontroller. The Signals were processed in quantized time windows using Matlab. By means of a neural network, the gestures were recognized and displayed both graphically and by a prosthesis. The achieved recognition rate was up to 87% across all gestures. CONCLUSION: With an increasing number of gestures to be detected, the functionality of a neural network exceeds that of any fuzzy logic concerning classification accuracy. The recognition rates fluctuated between the individual gestures. This indicates that further fine tuning is needed to better train the classification software. However, it demonstrated that relatively cheap hardware can be used to create a control system for upper extremity prostheses.
New features for real-time positioning system locator
Studený, Jakub ; Sekora, Jiří (referee) ; Kolářová, Jana (advisor)
The diploma thesis deals with the detection of falls and impacts, based on data obtained from inertial sensors, and by measuring the distance using a laser. The aim of this thesis is to extend the functionality of locators from Sewio. The thesis describes the procedure for designing algorithms for detection of falls and impacts. Then there is a procedure for development of hardware and software solution, for laser distance measurement by locator, together with presentation of achieved measurement results realized by locator after implementation of proposed solution. The work also emphasizes the minimization of energy consumption of individual solutions. In conclusion, there is a discussion of achieved results with evaluation of efficiency and usability of proposed solutions.
Uninterruptible Power Supply
Mrázek, Petr ; Harabiš, Vratislav (referee) ; Sekora, Jiří (advisor)
The thesis deals with Uninterruptible Power Supply (UPS) and associated problems of backup power in case of unexpected outages of electricity. Start of work is dedicated to limitation of the electricity supplies, as well as their causes and consequences. Furthermore, brief history of UPS and subsequently distinguish between UPS’s architectures. There is also a description of the energy sources such as batteries, flywheels or fuel cells. Part of thesis describes security of electricity supply in health care facilities, including requirements for emergency power. The own design of UPS is described in the end.
Statistical Analysis of Anomalies in Sensor Data
Gregorová, Kateřina ; Čmiel, Vratislav (referee) ; Sekora, Jiří (advisor)
This thesis deals with the failure mode detection of aircraft engines. The main approach to the detection is searching for anomalies in the sensor data. In order to get a comprehensive idea of the system and the particular sensors, the description of the whole system, namely the aircraft engine HTF7000 as well as the description of the sensors, are dealt with at the beginning of the thesis. A proposal of the anomaly detection algorithm based on three different detection methods is discussed in the second chapter. The above-mentioned methods are SVM (Support Vector Machine), K-means a ARIMA (Autoregressive Integrated Moving Average). The implementation of the algorithm including graphical user interface proposal are elaborated on in the next part of the thesis. Finally, statistical analysis of the results,the comparison of efficiency particular models and the discussion of outputs of the proposed algorithm can be found at the end of the thesis.
Control and monitoring of parameters in microfluidic systems
Meloun, Jan ; Sekora, Jiří (referee) ; Čmiel, Vratislav (advisor)
This thesis discusses the construction of Microfluidic systems for a microscope. The theoretical part of this thesis deals with light, light’s behaviour and optical spectral analysis in some methods are discussed. Also, the use of the development platform Arduino with wireless data transfer for data visualization is mentioned. Methods for measuring pH are mentioned as well. The practical part is dedicated to the construction of the Microfluidic system with the use of Arduino, smart mobile devices and a developed mobile application including controlling liquid flow with the measured data visualization.
Detection of Sleep Apnea in Adults
Vrana, Vojtěch ; Králík, Martin (referee) ; Sekora, Jiří (advisor)
The goal of this work is to construct a device detecting apneic respiration pauses during sleep. The most common cause of apnea pauses is obstruction of the airways, eg, airway collapse. Apnea leads to a deterioration in the quality of sleep and increases the risk of cardiovascular disease. The controller is designed on the Arduino Uno development board. The whole measuring device consists of two circuits for measuring the external manifestations of movement of respiratory muscles and a microphone for measuring the presence of air flow.
Control and monitoring of parameters in microfluidic systems
Meloun, Jan ; Sekora, Jiří (referee) ; Čmiel, Vratislav (advisor)
This thesis discusses the construction of Microfluidic systems for a microscope. The theoretical part of this thesis deals with cell and its survival in the environment. Furthermore, light, light’s behavior and optical spectral analysis in some methods is discussed. Also, the use of the development platform Arduino with wireless data transfer for data visualization is mentioned. Methods for measuring pH are mentioned as well. The practical part is dedicated to the construction of the Microfluidic system with the use of Arduino, smart mobile devices and a developed mobile application including controlling liquid flow with the measured data visualization.
Continuous breath monitoring
Sláma, Štěpán ; Sekora, Jiří (referee) ; Kolářová, Jana (advisor)
The purpose of this work is to get informations about the use of biofeedback, the physiology of breath and also about the investigation methods which is the physiology of breath evaluated by. The practical part is focused on creation of an application design with the use of biofeedback and measurement of pilot data. In this part implementation of the application is also done by training of the correct breath wave using biofeedback.
Human hearing sensitivity assesment
Tinka, Dominik ; Sekora, Jiří (referee) ; Škutková, Helena (advisor)
Bachelor thesis aims to evaluate changes of sensitive human hearing through created mobile application. According to obtained teoretical knowledges mobile application provide audiometrical measurements. In connection with this is described adjustments of sound outcomes of mobile, which is set in pursuance of calibrate unit. In the next part is described methodics of measuring and processing measured data. Static evaluation is processed on collected measured data from one proband and group of probands. Measurements on one proband were repeated for couple of days. The end of this thesis discusses about obtained results, which challenges the hypothes about sensitivity of hearing.
Testing of Recognizing Spatial Intelligence
Malý, Tomáš ; Škutková, Helena (referee) ; Sekora, Jiří (advisor)
This thesis deals with measurement issues in psychology, specifically online diagnostics of spatial abilities. It gives a brief look on psychological construct of intelligence and methods of measuring it, currently in the context of the most spread theory of intelligence C-H-C (Cattell- Horn-Carroll). This thesis focuses on ability called „Visualization“, that is understood as the ability to process visual perceptions and manipulate them in our imagination. The thesis includes functional software, which is made for online computer testing of spatial abilities in children of preschool, or school age.

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