In this project, the time-dependent one-dimensional heat equation with internal heating is solved using eigenfunction expansion, according to the thermoelectric boundary conditions. This derivation of the equation describing time-dependent heat flow in a thermoelectric sample or device yields a framework that scientists can use (by entering their own parameters into the equations) to predict the behavior of a system or to verify numerical calculations. Allowing scientists to predict the behavior of a system can help in decision making over whether a particular experiment is worthy of the time to construct and execute it. For experimentalists, it is valuable as a tool for comparison to validate the results of an experiment. The calculations done in this derivation can be applied to pulsed cooling systems, the analysis of Z-meter measurements, and other transient techniques that have yet to be invented. The vast majority of the calculations in this derivation were done by hand, but the parts that required numerical solutions, plotting, or powerful computation, were done using Mathematica 8. The process of filling in all the steps needed to arrive at a solution to the time-dependent heat equation for thermoelectrics yields many insights to the behavior of the various components of the system and provides a deeper understanding of such systems in general.

This diploma thesis deals with determination of geotechnical properties of soils with using method of electrical impedance spectrometry (EIS). For measurement was used device Z-meter of 3rd generation, which was developed with projects of international program of applied research EUREKA. Experiment was realized in Laboratory of soil mechanics in GEOtest a.s. in Brno.

The master´s thesis deals with snow cover monitoring especially in area Orlické mountains. For identification changes, which are related to variable loads on snow cover of temperature, humidity and gravity, has been selected indirect electrical method of measuring electrical impedance spectrometry. This method is described in the work and the results of monitoring are published in graphical form and are commented.

This dissertation presents the development of two unique measurement platforms. <br><br>The first system is a high-temperature Z-Meter. This system is designed to simultaneously measure the electrical resistivity, Seebeck coefficient, and thermal conductivity of a thermoelectric sample to accurately determine the figure of merit, ZT, for that material. It is designed to operated at sample temperatures of up to 1000C, and with temperature gradients on the order of 500C across the sample. This system also provides <i>in situ</i> load monitoring for contact pressure and allows the user to adjust loading during the experiment. <br><br>The second part of this dissertation focuses on the development of enhanced composite phase change material (PCM) heat sinks to improve passive thermal management in mobile electronics. We present a new design for a composite PCM heat sink and utilize off-the-shelf PCMs to show characterize the performance. In order to accurately investigate the performance enhancement of these designs, we develop a turn-key thermal management evaluation platform to allow the user complete control over the power profiles and cycling applied to the test chip, as well as providing <i>in situ</i> temperature monitoring within the chip. The proposed package designs show significant improvement in the length of time extended before reaching the cut-off temperature within the heatfluxes tested, 6 - 14 W/cm^2, and accomplish this while weighing less than the equivalent sensible heat storage design.<br><br><br><br>

Diploma thesis examines detection of residual moisture of porous media of using the measuring apparatus based on the application of the method of electrical impedance spectrometry (EIS). The devices Z-meter of third and fourth generation, were used for measurement, which were designed in projects international applied research. Experiment was executed in Laboratory of Water Management Research, Faculty of Civil Engineering, Brno University of Technology.

This doctoral thesis with the title „Monitoring of filtration processes in earth dams“ represents possibilities of using electrical impedance spectrometry method (EIS) and devices Z- meter II and Z- meter 2A based on it for using a monitoring earth-fill dikes of small water reservoirs. The devices are developed in the Laboratory of Water Management Research Institute of Water Structures Faculty of Civil Engineering Brno University of Technology through international projects E!3838 and E!4981 in EUREKA program. As part of submitted doctoral thesis the monitoring has been conducted at two locations – earth-fill dike of small water reservoir Bezedník III in the cadastral area Kobeřice and earth-fill dike of fish pond Rybník u kostelíka near the village Jevíčko. The general guidance has been compiled based on the knowledge and experience of measurements to monitor earth-fill dike using method EIS. This guide covers the use of method and device Z-meter II from the choice of location and monitored the profile, selection and installation of probes into the dam body, the preparation of measurement location, configuration of the measuring apparatus including a user program Z-scan, through the process of measurement and recommended method of processing data.