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Differences in price elasticity of diesel and petrol
Kačiaková, Petra ; Mirvald, Michal (advisor) ; Babin, Jan (referee)
This survey examines and compares differences in price elasticity of demand for diesel and gasoline. The data chosen for analysis were in the form of monthly time series obtained from particular petrol station in Slovakia. Other exogenous variables possess regional character and consist of average wage, HDP and rate of unemployment for region Žilina and Banská Bystrica. Time period covered by the survey begins by October 2008 and finishes by October 2013. The method chosen for analysis was ordinary least squares, both static and dynamic models. The results confirmed hypothesis that stated the price elasticity of diesel to be more elastic with average result from dynamic model -2,463 than price elasticity of demand for petrol with average result from dynamic model -0,36.
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Score of combine harvester with a different threshing device at harvest of cereals and oilseed rape in the business of agricultural production
HRACH, Milan
The purpose of this work was to compare aktivity and grade work combine harvester with different threshing system at harvesting a grain and oilseed rape in the business of agricultural production. Work was focuse on the size harvesting losses, grade grind and spreading crop residues, influence on the moisture of harvested crops on the size losses grade grind and spreading crop residues, throughput combine harvester, analysis of performance and consumption fuel. Work is complete about principal parametr agricultural operations, principal parametr owner machines and simply analysis of operating and investment costs. Although combine harvester didn't work at same land, measurement was done in the most consistent as possible in harvested condition regarding the weather, terrain, etc. From results are clearly that almost all the results achieved best results with a conventional combine harvester threshing mechanism Claas Lexion 580. Exception was only throughput at harvest of winter oilseed rape, which had machine John Deere S 690 with axial threshing of 1.23 kg ha-1 higher than Claas Lexion 580. Consumption fuel was lower at harvest of winter wheat with procrastination straw on the line by machine Claas Lwxion 670 with value 11,0 l.ha-1. . When shredding straw was reached average values for all combine. The worst grind and spread straw demonstrated combine harvester John Deere S 690 where avoid spreading crop residues over the entire stroke. All machines accomplish agro-technical requirements for the combine in terms of losses off 1,5 % in direct harvest, performance, throughput, quality scatter chop, shred the quality of crop residues and working speed. Results this work convince me to recommend harvester Claas Lexoon 580 especially for large agricultural business and for service businesses with minimum efficiency 1 340 ha.rok-1 . For smaller business or business with higer structure of livestock production I would have chosed thresher with straw walker technology separation device and to Claas Lexion 670. Combine harvester John Deere S 690 U would advised more for service businesses and large business engaged in growing corn for grain with minimum area coverage. For both machines I would choose the cutter adapter on the frame 9 meters.
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Combine harvester CLAAS with tracked chasses evaluation
CIRHAN, Radek
This work is focused to combine harvester with tracked chasses evaluation. Evaluated combine harvester is Claas Lexion 570 TerraTrac. Size of losses, quality of crushing and spreading of postharvest rests is evaluated at combine harvester. In the next part of this work is humidity influence at size of losses, quality of crushing and spreading of postharvest rests evaluated. Work is filled in for analysis of output, fuel consumption, influence of tracked chasses to output and economic machine evaluation. Size of losses at grains complies agrotechnics conditions, this conditions weren´t complied at harvest of oilseed rape. Influence of humidity to quality of spreading was insignificant and it is around 1%. Fuel consumption ranged from 19,8 to 20,86 l*ha-1. Output of machine ranged from 2,91 to 3,16 ha*hod-1. Combine harvester reached economic losses in first year, which was given by low annual using of machine. The least annual using is 617 ha.
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Airlinerʼs cost index
Ján, Tomáš ; Novák, Radek (advisor) ; Vinař, Marek (referee)
This diploma thesis is focused on cost index. Cost index is one of the method, which is used for cost optimalization in airline operation. Cost index compare time-related costs during flight and cost of fuel. Value of cost index influences cruise speed and fuel consumption, the higher cost index, the higher speed. Costs classification into fixed, variable and time-related costs is very important for cost index calculation. Goal of thesis is decribe importance of using cost index and advantages resulting from correct cost index application in airline operations. Practical part is focued on fuel consumption of Boeing 737 on specific routes and its evaluation. The goal is to compare calculated and real fuel consumption and find, if an airline is able to achieve calculated consumption in real operation.
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Zhodnocení dopadů alternativních paliv v dopravě na kvalitu ovzduší a změny klimatu v závislosti na scénářích vývoje dopravy v České republice
Centrum dopravního výzkumu, v.v.i., Brno ; Provalilová, I. ; Matysík, M. ; Jedlička, J. ; Cholava, R. ; Dufek, J. ; Dostál, I. ; Adamec, V. ; Smékal, Petr
Cílem projektu je vytvořit prognózu spotřeby energie v sektoru dopravy v ČR do roku 2030. V závislosti na prognóze spotřeby energie budou vytvořeny scénáře rozvoje alternativních paliv v ČR, které budou odvozeny od legislativních a koncepčních materiálů ČR, technologických možností a potenciálu výroby. Na základě vypracovaných scénářů rozvoje jednotlivých motorových paliv budou vytvořeny prognózy emisí nejvýznamnějšího skleníkového plynu CO2 z dopravy, které jsou přímo úměrné spotřebě paliva. Pro vývoj emisí legislativně sledovaných škodlivin z dopravy bude vytvořen dopravní model ČR v softwaru EMME/3. Na základě prognózy vývoje vozového parku České republiky do roku 2030 budou dopravním modelem stanoveny emise legislativně sledovaných škodlivin z dopravy.
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Magnetic resonance imaging assessment of the impact on fuel consumption during operation of the engine.
SOUČEK, Karel
The introductory part of this work is dedicated to the conversion of fuel energy into mechanical energy by internal combustion engines. Furthermore, an analysis of technical solutions to reduce fuel consumption. The paper addressed the issue of fuel consumption during operation of the combustion engine and its optimization. It is studied and assessed the impact of systems operating on the principle of magnetic resonance in the fuel in internal combustion engine operation.
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