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Physiological status of young silver fir on stands with different microclimate using biochemical, and optical needle traits.
Kabilková, Eva ; Lhotáková, Zuzana (advisor) ; Pokorný, Radek (referee)
Silver fir (Abies alba Mill.) is a candidate tree species in the process of forest transformation especially of spruce monoculture stands (Picea Abies (L.) H. Karst.), thanks to its better growth characteristics in conditions of mild drought. However, fir, as a very shade tolerant tree, may be more susceptible to various abiotic stressors in more open forest canopies, and therefore it is necessary to study its ecological requirements in connection with the most effective possible application in forestry. In this thesis, the physiological state of young fir stands affected by different light microclimatic conditions, which were represented by different types of forest regeneration, was studied. Specifically, it is shelter-wood cut, which represents the likely highest degree of shading by mature trees, then natural regeneration under sparse canopy, gap cut and small clear cut, which represent a moderate degree of shading by mature trees, and last but not least, clear cut, which represents the lowest degree of shading. Physiological status was evaluated using biochemical and optical properties of the needles, and additional microclimatic conditions of the habitats, namely temperature and soil moisture, were also evaluated. Our results showed that the used biochemical and optical properties of the...
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Process Optimization in the Company
Pokorný, Robin ; Hrdina, Pavel (referee) ; Videcká, Zdeňka (advisor)
The bachelor thesis deals with the analysis of a production process and its optimization with the aim of streamlining production. The improvement is achieved through applying lean manufacturing tools and advanced analytical tools of simulation modelling. The theoretical section of the thesis introduces used principles, methods, and analyses. The analytical part evaluates the current state of the production process and serves as a basis for the design part, whereas the design part analyses the material and information flows using the Value-Stream Mapping methodology. The simulation model was created to aid the balancing of operations and the re-engineering of the production line. The output of this study proposes enhancements to the problem areas of the existing production process.
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Design of a programmable attenuator
Pokorný, Rostislav ; Mašek, Pavel (referee) ; Štůsek, Martin (advisor)
This Master´s thesis focuses on design and implementation of programmable attenuator. The main aim of this thesis is to create an electronical device that provide continuous setting of attenuation value in the range between 0–150 dB. Setting a value from the range can be performed using buttons and set values are shown on display. For this thesis an attenuator with working frequency between 0–6 GHz was chosen and four–layer printed circuit board was designed. As a result the device is fitted with an 8bit microcontroller ATmega328P–PU using five 6bit digital attenuators connected in series with manual and program settings of attenuation from 0–157,5 dB with step of 0,5 dB. Data are shown on a build–in display. The application for remote settings and value reading over integrated USB (Universal Serial Bus) interface, was created in C#. In conclusion of this thesis there is a measurement evaluation of attenuation measurement performed on the device.
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Measuring of Electricity Consumption Utilizing Current Transformer and Arduino Platform
Pokorný, Rostislav ; Pokorný, Jiří (referee) ; Štůsek, Martin (advisor)
The aim of this bachelor thesis is implementation of non-invasive platform for measuring the consumption and production of electrical power. Developed device enables visualization of measured data on display. Electric current is measured by non-invasive current sensor equipped with split core made of ferrite. Measured data are processed on single board microcomputer called Arduino. The device enables wireless communication with a server platform that allows visualization of measured data in a simple graphical user interface based on the ThingSpeak platform. Created device can measure consumption or production of electrical power on appliance with maximum current up to 30 A without need of any changes in electric circuit.
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Accumulating energy wood head
Pokorný, Radek ; Hloušek, David (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor thesis deals with the design and custom concept of a cutting head for the removal of small seeding trees located on the loading crane of a forestry machine. The device is designed as an extension of the service machine while the loading crane with the cutting head is part of lumber mining machinery or a forwarder. The work is focused on the design of the selected unit.
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Comparison of gradient measurement and modelling of deposition rate of ozone to spruce forest in locality Bílý Kříž.
Zapletal, M. ; Chroust, P. ; Večeřa, Zbyněk ; Mikuška, Pavel ; Cudlín, Pavel ; Urban, Otmar ; Pokorný, Radek ; Czerný, Radek ; Janouš, Dalibor ; Taufarová, Klára ; Marek, Michal V. ; Hůnová, I. ; Černikovský, L. ; Medlen, A.
Comparison of measured and modelled deposition rate of ozone to spruce forest in locality Bílý Kříž. Estimation of daily changes in deposition and stomatal flux of ozone into spruce forest.
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Process Optimization in the Company
Pokorný, Robin ; Hrdina, Pavel (referee) ; Videcká, Zdeňka (advisor)
The bachelor thesis deals with the analysis of a production process and its optimization with the aim of streamlining production. The improvement is achieved through applying lean manufacturing tools and advanced analytical tools of simulation modelling. The theoretical section of the thesis introduces used principles, methods, and analyses. The analytical part evaluates the current state of the production process and serves as a basis for the design part, whereas the design part analyses the material and information flows using the Value-Stream Mapping methodology. The simulation model was created to aid the balancing of operations and the re-engineering of the production line. The output of this study proposes enhancements to the problem areas of the existing production process.
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