National Repository of Grey Literature 46 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Characteristics of the atmosphere of Mars for optical communication
Marčák, Tomáš ; Barcík, Peter (referee) ; Hudcová, Lucie (advisor)
The bachelor thesis is focused on the issue and research of atmosphere of the planet Mars for optical communication. The main goal of this thesis was to introduce the transmission through the atmosphere of the Mars and define possible wavelengths which could be used as possible communication. This thesis mainly introduces the optical communication and facts about the atmosphere of the planet. The main chapter presents more detailed analysis of composition of the atmosphere, the impact of the composition that is used for the radiation transmission. Lastly there are presented the results of the calculations and characteristics of the transmission through the Mars atmosphere. The next chapter is focused on theory of optical transmitters and its division. Subsequently, thesis describes the program for calculation of temporal, spatial and energetic characteristics of optical beam.
The use of robotic Rovers to explore Mars
Pekař, Štěpán ; Sedláček, Pavel (referee) ; Froehling, Kenneth (advisor)
Tato bakalářská práce se zaměřuje na tři vesmírné mise, a to Mars Pathfinder, Mars Exploration Rover a Mars Science Laboratory. Hlavní součástí těchto tří misí jsou čtyři rovery (Sojourner, Spirit, Opportunity a Curiosity), které byly odeslány na povrch Rudé planety. Práce se věnuje především vědeckému vybavení jednotlivých roverů, použitým technologiím a nejdůležitějším vědeckým poznatkům získaných za dobu působení roverů na Marsu.
Effects of electrical discharges on the Mars´ atmosphere
Fojtíková, Nikola ; Horák, Jakub (referee) ; Kozáková, Zdenka (advisor)
The aim of this thesis was to study the effects of electric discharge on the atmosphere simu-lating conditions on Mars. This bachelor thesis is focused on simulation of Mars atmosphere at atmospheric pressure and normal laboratory temperature. Mars's atmosphere was more like Earth in the past. Mars is mostly composed of carbon dioxide, which accounts for more than 90% of Mars' atmosphere. To study the Mars atmosphere simulation, glow discharge generated in the reactor at atmospheric pressure was used at a CO2 flow (100 sccm) and dis-charge current of 20, 30 and 40 mA. A part of the measurements was focused on the influ-ence of hydrogen addition at different flow rates. The measurement time course with differ-ent measurement changes was also recorded. Reaction products were analysed using a pro-ton ion mass spectrometer and a flight time analyser. A high amount of aliphatic hydrocar-bons and their derivates, especially alcohols, was detected as well as several cyclic struc-tures. The main products identified in all experiments with a substantial concentration were molecules of ethen, ethane, ethanol, acetone, pentane, benzene and others.
Diagnostics of plasma generated in the atmosphere simulating Mars
Fojtíková, Nikola ; RNDr. Martin Ferus, Ph.D., (referee) ; Kozáková, Zdenka (advisor)
The aim of the diploma thesis was the diagnostics of plasma generated in the atmosphere simulating conditions on Mars. This diploma thesis is focused on the simulation of Mars’ atmosphere at atmospheric pressure and normal laboratory temperature. Due to the similar conditions of Mars' atmosphere with Earth, this planet has been explored in the past as well as up to now. Mars' atmosphere is composed mostly of carbon dioxide, which makes up more than 90 % of Mars' atmosphere. A glow discharge generated in a special reactor at atmospheric pressure at a flow of pure CO2 was used to simulate the atmosphere of Mars. Part of the measurement was performed only in pure CO2 with changing current of 20, 25, 30, 35 and 40 mA. Part of the measurements was focused on the study of the effect of the addition of various gases, such as nitrogen, hydrogen and methane, at changes in their flow rates of 1, 2, 3, 4 and 5 sccm. The products formed in the special reactor were analysed using a mass spectrometer with proton ionization and with a flight time analyser. Optical emission spectrometry was used for plasma diagnostics and composition. Mainly simple aliphatic hydrocarbons, alcohols, aldehydes, and ketones were detected. With increasing flow rates of the individual gases, more complex aromatic compounds with higher molecular weights were formed. Corresponding mass and optical emission spectra were measured simultaneously.
Terraforming Mars
Gabriel, Michael ; Frlorián,, Miloš (referee) ; Mléčka, Jan (advisor)
Terraforming mars by autonomous robotic building system, inspired by social insect. Idea design of robotic solution, their transportation and software. Design of structures builded by robots and their function. Pyramidal structures interwoven with ice tunnel, heat the atmosphere of Mars and accumulate heat in their mass. These structures are built with cheap and simple robots that mimic the behavior of social insects.
Science missions of spacecraft in our Solar System and beyond
Černoch, Jakub ; Zikmund, Pavel (referee) ; Mašek, Jakub (advisor)
This bachelor thesis is aimed on the space probe missions, that landed on objects in our Solar system. First part of this thesis is aimed on the missions that were proposed by one of the many space research agencies. Second part of this thesis is aimed on proposal of mission and basic parameters of hopper that should be able to relocate himself on the surface of planet Mars and carry out there, the scientific research. The hopper will use hybrid rocket engines.
Autonomous Rover Navigation on Planetary Surface
Vaško, Marek ; Prustoměrský, Milan (referee) ; Chudý, Peter (advisor)
Výskum hlbín vesmíru doviedol k vývoju technológii v rôznych oblastiach. Jednou z týchto oblastí je prieskum povrchu mimozemských planét. Efektívny spôsob skúmania je bezpilotné pozemné vozidlo. Práca sa zaoberá jedným z najdôležitejších systémov bezpilotných vozidiel, čím je autonómna navigácia. Vozidlo sa musí vedieť orientovať v priestore a zmapovať potenciálne prekážky. Práca v úvode preskúma navigačné princípy, ktoré boli využívané existujúcimi vozidlami. Neskôr preskúma využitie algoritmu na princípe súčasnej lokalizácie a mapovania a jeho implementáciu v MATLAB-e. Tento algoritmus bude integrovaný do simulátora, ktorý umožní neskoršiu integráciu do reálneho prostredia pomocou Robot Operating System. V simulátore bude navrhnutá platforma vozidla so simulovanými senzormi a šesť-kolesovým podvozkom, ktorá bude slúžiť na testovanie integrovaného algoritmu. V závere sa vyhodnotí kvalita navrhnutého algoritmu a zaháji sa diskusia o budúcich vylepšeniach.
Qualification test of heat switch for Martian conditions
Mašek, Jakub ; Horák, Marek (referee) ; Popela, Robert (advisor)
Diplomová práce se zabývá studiem projektu tepelného spínače a dosažených výsledků. Zaměřuje se především na vývoj zařízení pro zkoušení tepelného spínače v podmínkách odpovídající prostředí planety Marsu. První část práce se zabývá především popisem vývoje zkušební komory určené pro simulaci extrémních podmínek, tj. nízkého tlaku a teplot, od předběžného návrhu až po konečnou podobu komory, která bude použita pro předepsané zkoušky. Práce popisuje také důvody úprav některých částí komory a uvádí návrhy řešení nepředvídaných událostí, které vznikly v průběhu testů. Cílem druhé části práce je návrh kampaně pro zkoušení tepelného spínače od úvodních zkoušek ověření základní funkčnosti komory, přes ověření vlastností a nastavení všech systémů měřícího zařízení, až po zkoušky na prvních vzorcích a závěrečném kvalifikačním modelu tepelného spínače. Dále se práce zaměřuje na postup vyhodnocení naměřených dat a jevů, které jej ovlivňují. Kalibrační zkoušky zařízení, systémů a postupu vyhodnocení naměřených dat, které byly provedeny na speciálně navržených náhradních vzorcích, jsou téměř u konce. Jakmile budou výsledky schváleny, zkušební komora i navržené postupy měření budou připraveny pro požadované zkoušení vzorků tepelného spínače.
Predictive Modelling with Python
Duda, Jan ; Burgetová, Ivana (referee) ; Zendulka, Jaroslav (advisor)
The main goal of this bachelor thesis is get to know with the data mining and its domain, also with the Knowledge discovery in databases process. It shows the most importnant approaches, which are implemented in Python language afterwards. The case study contains the prediction of index S&P 500 describing stock market developments on the US stock exchange. Both classification and regression models are used for the forecasting. Model evaluation is reached by the Monte Carlo experimental method.
Design and overview of unmanned vehicles for exploration of space objects
Dostálová, Adéla ; Lazar, Václav (referee) ; Bartoněk, Jaroslav (advisor)
The content of this bachelor’s thesis is overview of unmanned vehicles for exploration of space objects. The first part of this thesis adress probes that have been sent to the Moon. Summarizes their parameters and results of individual missions. The second part focuses on probes sent to Mars, their contribution and technical specifications. Comparison of conceptual solutions of space probes is also included in this thesis.

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