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Rational Inattention in DSGE Model
Vostřák, David ; Malovaná, Simona (advisor) ; Kopečná, Vědunka (referee)
A great amount of available information over the internet makes it impossible for anyone to process it all. In this thesis, we use the rational inattention theory to see how the perceived signals about the exogenous variables would change under different levels of information capacity. Those signals are then applied in the New Keynesian model and corresponding impulse responses are compared with the case of unlimited attention. We found that for some autoregressive processes the differences from the perfect attention case are not very profound while for others the results vary considerably.
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The Effect of Geopolitics on Commodity Prices
McGrouther, Robert ; Semerák, Vilém (advisor) ; Riegl, Martin (referee)
The thesis examines the effects of geopolitical events on global crude oil, wheat and aluminum prices. Geopolitical events have the potential to disrupt the production and supply of commodities to markets, affecting prices. Path analysis models that mirror crude oil, wheat and aluminum markets are constructed using theories specific to each commodity to measure how substantial the impacts of different variables are upon prices. Vector error correction models are then employed to test if individual geopolitical events have long-term effects on prices. An analysis of production and exports of commodities in regions and countries affected by geopolitical events is conducted to determine how severely production is disrupted. A basic examination of prices before, during and after geopolitical events is conducted to understand how quickly drivers of commodity prices can shift between geopolitical events and supply and demand fundamentals. It also serves to show how quickly prices revert to pre-event levels following a geopolitical event.
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On the design and technology of a test bench for hydraulic engine
Duret, Mikhaël ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
Every building needs to be built on solid foundations. Hydromills are machines used to make it possible in excavating very hard ground. This project is about the creation of a test bench for hydraulic motors called here hydromill motors. Excavating is really soliciting for the equipment and leads to many breakages that is why the company asked for the creation of a test bench to measure the lifespan and the reaction of their motors to the forces acting during the cutting. It is complicated to copy the forces and shocks happening in reality because they are very high with quick variations, also depending on the ground. This test bench will have to create high variable loads acting on several directions, a high counter-rotation torque corresponding with the resistance of the ground to the cutting, as well as angular and longitudinal shocks to simulate the hits on the rocks by the teeth.Furthermore the measuring of the internal pressure and hydraulic flow plus the deformations of the main parts of the motors has to be enable by the test bench. The main part of this internship was devoted to the choice of the technical solutions to realize the functions of the test bench as well as the research of companies able to create the test bench elements. Many of them are not conventional due to the high requirements and have to be manufactured individually. In the end an evaluation of the costs and production will give all the information to the company to decide to manufacture it.
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