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Intelligent Access Control System for Large Facilities
Truhlář, Jan ; Mrázek, Vojtěch (referee) ; Vašíček, Zdeněk (advisor)
Aim of this work is to create autonomous embedded device which allows access control with radio frequency identification (RFID). Device is configurable by web interface and offers access history. Updates of RFID cards database are realised by mesh network. For realisation of this work is used developement kit based on Espressif Systems ESP8266 chip, which is programmed with open-source platform Arduino. Created device can be used in locations without direct network covrage.
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Discrete differential geometry and its applications
Vidličková, Eva ; Šír, Zbyněk (advisor) ; Hron, Jaroslav (referee)
In this thesis we present an elementary introduction to the Discrete differen- tial geometry. We will work with both discrete curves and discrete surfaces. Firstly some basic definitions and theorems from classic Differential geometry will be mentioned and then we will translate these concepts to the discrete setting, so that some important global structures are still preserved. At the end we implement mean curvature flow defined on discrete surfaces and run it on two meshes, that show its area-minimizing feature. This can be used for denoising the discrete surfaces. 1
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Design and experimental verification of MESH type radio network for non-licensed bands
Váňa, Martin ; Mlýnek, Petr (referee) ; Fujdiak, Radek (advisor)
This thesis is focused on problematic of designing a MESH network with use of IQRF technology. Basic techniques in radio transmission are presented in the introduction part, followed by technologies used in the radio environment. The second chapter presents IQRF, its base parameters and devices which can be used in its network, including cloud. The third part deals with the designing of topology and the methodology of the experimental verification. The last chapter stresses the measurement of parameters of IQRF network in various conditions and arrangements.
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Structured-light 3D scanner
Hadzima, Jaroslav ; Chromý, Adam (referee) ; Jelínek, Aleš (advisor)
3D scanner is a device capable of creating a model using analysis, most commonly from image data. 3D scanners could be divided into two major groups, contact and noncontact scanners. Aim of this study is to interpret problematics of 3D scanning with structured light. Specifically usage of Gray code patterns. There is step by step evaluation of individual hardware and software obstacles and possible errors, from calibration to final point cloud. In next section, there are included tests determining quality, precision and accuracy of scanning with given method. System is applicable to mobile robots and yet fully remotely controlled. The majority of enumerations is taking place in Raspberry Pi 3 model B, just visualization alone is done from computer.
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Polygonal Mesh Segmentation
Minařík, Vojtěch ; Havel, Jiří (referee) ; Španěl, Michal (advisor)
Bachelor's thesis deals with 3D model segmentation into particular meaningful segments. Method is based on algorithm described in article Protrusion-oriented 3D mesh segmentation The realized solution is based on assumption, that 3D models consist of a core and core attached protrusions. The segmentation algorithm consists of three main steps: core approximation, selection of salient points which indicate end of protrusion and assignment of points to appropriate segments. Implementation uses library CGAL which is useful for loading and manipulating 3D meshes.
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The effect of electromagnetic fields on cell structure
Urbánek, Jiří ; Fiala, Pavel (referee) ; Vlachová Hutová, Eliška (advisor)
The main concern of the work is researching the influence of electromagnetic field on cellular structures. Cellular structures is a general term for all the organelles placed in a cell. In our 2D model we take into consideration just the fundamental organelles such as cell membrane, cytoplasm and cell nucleus. The aim of the work was to get acquainted with the outer environment into which we had placed the 2D model of the cell and on which we had applied the magnetic field. The work contains the results gained by numeric modelling in the physical programme COMSOL. These results prove the theoretical presumption.
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Change of magnetic susceptibility during the germination of plants
Sedlář, Petr ; Fiala, Pavel (referee) ; Vlachová Hutová, Eliška (advisor)
The work examines the changes in the magnetic susceptibility during the early germination of the somatic embryo (RSE) of the Norway spruce. Susceptibility is in the physically view the property, which can be used to determine a variety of parameters and properties of the measured objects. The aim of this work was to create a automatic to evaluate the susceptibility of the tissue RSE and take measurements to prove or disprove the contrary of the accuracy of this assessment. This work contains the results obtained by modeling a script in Matlab, in which can be shown the correctness of the theoretical concepts.
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Light Weight Mesh Experiments
Nováček, Richard ; Botta, Miroslav (referee) ; Šimek, Milan (advisor)
Semestral thesis deals new technology Lightweight Mesh and its implementation on a laboratory task to the subject of wireless sensor networks and the creation of appropriate documentation, which will serve as a basis to students. Also included is the use of serial communication, timer and ADC in Atmel Studio.
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Calculation and optimization of synchronous servomotor reluctance torque.
Kroupa, Martin ; Hájek, Vítězslav (referee) ; Ondrůšek, Čestmír (advisor)
This work is mainly focused on construction and design simulation of synchronous servomotor. This motor is built by 30 permanent magnets which are attached to rotor and solved in Ansoft Maxwell 14 software. The main purpose was to calculate reluctance torque, which is significant during the motor operational mode and its optimization. Ansoft Maxwell 14 can analyze in 2D mode as well as in 3D mode, for analysis it uses method of finite elements. Subjects can be analyzed in static conditions, or in any way of transient movement. Optimization in 2D, where we will change the shape in the area of air gap, will only be used as revision that the reluctance torque is bounded with this factor. The main simulations were supposed to be done in 3D model, where the role of rotation should have been taken in account to the final result. These simulations were replaced by alternative calculation. On behalf of achieved results, the optional rotation is stated in the end of my work.
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