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Modification of columned hydraulic press
Pospíšil, Lukáš ; Malášek, Jiří (referee) ; Škopán, Miroslav (advisor)
This bachelor’s thesis is focused on structural modifications of the universal columned hydraulic press. The thesis proposes justifiable structural modifications of fundamental parts of the press, including material choices, and necessary calculations and simulations of material strength and deformation characteristics. Calculated specifications of the unit that powers the press are also presented.
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Dependence of Single-Molecule Conductance of Pyridinium Derivatives on Their Structure
Lachmanová, Štěpánka ; Hromadová, Magdaléna ; Kolivoška, Viliam ; Pospíšil, Lubomír ; Gasior, Jindřich ; Mészáros, G. ; Lainé, P. P.
The derivates of pyridinium belong to promising group of molecules applicable in molecular electronics. For this purpose, four expanded branched pyridinium compounds were synthetized and the influence of the molecular structure on their electrochemical properties and single-molecule conductances has been studied. The highest values of conductance provided compounds 9-(pyridin-4-yl)benzo[c]benzo[1,2]quinolizino[3,4,5,6-ija][1,6]naphthyridin-15-ium tetrafluoroborate and 3,5-dimethyl-2´,6´-diphenyl-[4,1´:4´,4´´-terpyridin]-1´-ium tetrafluoroborate. By the electrochemical reduction both of these compounds received two electrons in two separated one-electron steps. On the other hand, the compounds 2´,6´-diphenyl-[4,1´:4´,4´´-terpyridin]-1´-ium tetrafluoroborate and 2,6-diphenyl-4-(4-(pyridin-4-yl)phenyl)-[1,4´-bipyridin]-1-ium tetrafluoroborate are reduced by different mechanism and their conductance was lower.
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Dlouhodobý finanční plán podniku Gama, s. r. o.
Pospíšil, Lukáš
Pospíšil, L. A long-term financial plan of Gama ltd. Diploma thesis. Brno: MENDELU in Brno, 2014. The goal of my diploma thesis is to propose a long- term financial plan of Gama ltd. in three variants: realistic, pessimistic and optimistic. Financial plan is made for 2013-2017 period. There are financial analysis for 2008-2012 period and strategic analysis in the diploma thesis. The next point is proposal to plan of revenues based on strategic analysis. There is made a long-term financial plan of Gama ltd. on the basis of value drivers and plan of revenues.
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Electrochemical Properties of Branched Pyridinium Cations
Lachmanová, Štěpánka ; Hromadová, Magdaléna ; Pospíšil, Lubomír ; Lainé, P. P.
The electrochemical properties of branched extended pyridinium cations depend strongly on the structure of the molecule. This work is focused on the redox processes of the electron transfer of four derivatives of pyridinium. The electron transfer mechanism was studied by various electrochemical methods. Although the structures of the studied molecules seem to be quite similar, 1-N-methyl-2,4,6-triphenylpyridinium and 1',3',5'-trimethyl-2,4,6-triphenyl-1,4'-bipyridine-1,1'-diium are reduced in two separate one-electron transfer steps. On the other hand, 1'-methyl-2,4,6-triphenyl-1,4'-bipyridine-1,1'-diium and 1',3,5-trimethyl-2,4,6-triphenyl-1,4'-bipyridine-1,1'-diium accept two electrons, but in a single two-electron transfer. The heterogeneous rate constants of the electron-transfer processes were determined.
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Comparison of the monetary policy of the FED during the 1930s and during the Great Crisis
Pospíšil, Lukáš ; Pavlík, Zdeněk (advisor) ; Baluchová, Daniela (referee)
The following bachelor thesis deals with the comparison of the decisions made by the American central bank before and during the period of the Great Depression and the Great Crisis while taking into account several points of view. In order to provide thorough understanding to the reader the first part is about the characterization of the origins of the central banking from the perspective of an representative of the Austrian School of economics Rothbard, the second part is about the organizational structure of the FED. The third chapter compares the politics of the FED before the particular crisis. The core of the thesis lies on the thoughts of Bernanke the present chairman of the FED, who is known due to his study on the Great Depression. It ensures that we better understand the current attitude of the FED. Chapters 4 and 5 evaluate the cause of the very crisis.
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Electrochemistry of halogenated benzenonitrils
Sokolová, Romana ; Pospíšil, Lubomír ; Hromadová, Magdaléna ; Ludvík, Jiří
Autoprotonation in reduction mechanism of 3,5-dihalogeno-4-hydroxy-benzonitriles was studied in dimethylsulfoxide by electrochemical methods. The overall one electron reduction process was found. Aryl radical formed by the cleavage of halogenide undergroes further electron transfer in EC type reaction. The anion is protonated by parent molecule resulting in total consumption of two electrons per two starting molecules. Addition of stronger proton donor increases the height of reduction wave up to two electrons per molecule. The addition of potassium hydroxide causes the decrease of the reduction wave. The reduction products were identified by GC/MS analysis in the absence and presence of strong proton donor.
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