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Dissertations / Theses on the topic 'Vyvážení'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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1

Přeslička, Jaroslav. "Vyvážení tříválcového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231700.

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The thesis deals with analysis of balancing of given cranktrain. At the introductory part is solved kinematics of the crank mechanism. Another part of the text occupies with dynamics of the crank mechanism and eventuality of its balancing with using of point-mass model. This simplified model is utilized for analytic solution of given mechanism. Results of analytic solution are compared with results of MBS solution. At the last part is done analysis of minimal distance between the selected parts of the mechanism. Then simple optimization of balancing is done. At the end is considered balancing of the mechanism and simple improvement is proposed, considered are results of minimal distance analysis too.
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2

Svoboda, Radim. "Kontrola vyvážení klikového mechanismu maloobjemového traktorového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-231005.

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The purpose of this thesis is determinate the forces in crankshaft mechanism acting on new design engine from company Zetor, assessment of the state of balance, design modifications balancing units, calculation of modal analysis, stress analysis and strain control. The content of the work is the creation of technical documentation for the newly modified balancer shafts.
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3

Vaško, Roman. "Možnosti vyvážení dvouválcového motoru pro traktorové použiti." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231704.

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This thesis deals with possibilities of 2-cylinder engine balancing for tractor usage. The purpose of this thesis is to find a technical solution for the creation of the concept of balancing using balancing shaft. Check the proposed solution by FEM analysis and evaluate the fatigue safety. The content of the thesis is the creation of computational and graphical documentation too.
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Čepica, Vojtěch. "Posouzení vlivu tuhosti ložiskových štítů a kvality vyvážení na vibrace synchronního generátoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-254405.

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The main focus of my master thesis is the assessment of effects of the bearing shields stiffness and balance quality on synchronous generator vibration. The incentive of writing the thesis is the problematic situation, which is characterized by synchronous generator vibration. The aim of my thesis is to variate shields stiffness and to find out the dependence of vibration on stiffness during nominal speed. I have used the program ANSYS based on finite element method to solve this problem.
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Luka, Jan. "Návrh klikového hřídele leteckého motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229370.

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The main aim of this thesis is to design the cranckshaft for aircraft diesel engine with ordered basic parameters. The engine is flat with four-cylinder and opposed pistons. The thesis is focused on balancing of centrifugal and reciprocating forces and their moments, conceptual design of crankshaft and its stress calculation. The thesis is describing calculation of torsional vibrations as well.
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Macka, Jan. "Kontrolní pevnostní propočet hnacího ústrojí LVS 511." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232138.

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This master’s thesis deals with analysis of the gearbox housing of forwarder LVS 511. Theme is designed by Strojírna Novotný s.r.o. Objective of the work is to perform strain stress analysis of gear housing and main transmission shaft. The main part of the thesis is focused on creating of finite element model and evaluation in NX I-Deas software.
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Schwarzbier, Pavel. "Hnací ústrojí dvouválcového zážehového motoru pro malý osobní automobil." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2009. http://www.nusl.cz/ntk/nusl-228833.

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This master's thesis focuses on cranktrain of two-cylinder spark ignition engine. Aim of this thesis is the following sequence. Comparing various construction configurations, choosing the best concept, balancing inertial forces of reciprocating and revolving masses and theirs moments within this concept and finally checking the torsion stress.
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8

Mach, Tomáš. "Návrh stavitelného stabilizátoru letounu JA-400." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417470.

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Tato diplomová práce se zabývá návrhem stavitelného stabilizátoru za účelem vyvažování letounu a zlepšení jeho letových výkonů. Cílem práce bylo navrhnout konstrukční řešení ovládání a zavěšení horizontálního stabilizátoru. Součástí je pevnostní výpočet kritických konstrukčních prvků a návrh letových zkoušek. V závěru jsou zhodnoceny výhody a nevýhody nového řešení a posouzení možnosti sériové výroby. Klíčová slova Ultralight, JA – 400, stabilizátor, stavitelný stabilizátor, vodorovné ocasní plochy, vyvážení. Abstract This thesis describes the design of adjustable stabilizer for the purpose of balancing the aircraft and improve its flight performance. The aim was to propose a design solution for control and hinge system of horizontal stabilizer. It includes the strength calculation of critical structural components and the design of flight tests. The conclusion evaluates the pros and cons of the new solutions and possibilities of mass production.
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9

Bolcek, Adam. "Dvouválcový motocyklový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231730.

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The main aim of this master’s thesis is balancing of the inertia forces of sliding parts of the twin cylinder motorcycle’s engine by dummy connecting rod. There is description of two computing stances to design dummy connecting rod. Then there is comparison of these computing stances. The dummy connecting rod is designed and the strength analysis is done by FEM method (finite element method) to limit the state of material fatigue. Furthermore, a crankshaft is designed while considering rotation parts’ inertia forces balancing. Finally, a strength analysis by FEM method is done to limit state of material fatigue of the crankshaft
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10

Jandásek, Martin. "Dynamicky vyvážený rezonanční adhezní tester." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-399347.

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This diploma thesis is dedicated to the development of mobile resonance-adhesion tester TriTec. The aim of this thesis is to improve the parameters of the tester in comparison to the previous version of tester, especially to minimize the vibrations of the tester while running without load, and to the make long-distance transportation of tester easier. The first part of thesis was aimed on history of development of TriTec tester, causes of it´s problems and on analysis of vibration minimization possibilities. As a best solution is considered a rotational balance mechanism, which was designed in next part of thesis. After that a new front wheel drive and an user interface conception were designed. The modified tester reaches all the deserved parameters and is able to compete static resonance-adhesion testers by it´s lower price and high mobility.
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11

Dušek, Libor. "Dvojitě vyvážený směšovač – laboratorní přípravek." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217711.

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The aim of this work was double-balanced mixer implementation, which will be used like laboratory equipment. This thesis deals with design of the double-balanced mixer from first theoretical principles to a practical design of a laboratory equipment. For the practical design the integrated mixer SA612 was used. Input signal to the mixer up to 500 MHz frequency can be used. For required operation external oscillator and fifth-order low pass filter were constructed. Oscillator was designed for fixed frequency 32 MHz. Fifth-order low pass filter was inserted between the mixer and the oscillator, because of filtering higher harmonics. The second aim of the work was measuring double-balanced mixer basic parameters, such as Compression Point (P-1dB) and Intercept Point (IP3). For the IP3 measurement, another one device was required. It consists of the power combiner for mixing two frequency close signals and third-order bandpass filter, which selects required frequency band. Finally, the laboratory equipment was fabricated and its real parameters were measured.
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12

Příborský, Vladimír. "Hnací ústrojí čtyřválcového leteckého motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228016.

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This thesis named Powertrain of an four-cylinder aircraft engine dealing with configuration of the powertrain of a flat four-cylinder engine with ordered basic parameters. The thesis is focused on configuration design of the crank machanism and sequence ignition, balancing of centrifugal and reciprocating forces and their moment, conceptual design of crankshaft and its stress calculation. The thesis describing calculation of torsional vibration as well.
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13

Fáber, Filip. "Zážehový motor pro malá osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2012. http://www.nusl.cz/ntk/nusl-230346.

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The aim of this master’s thesis was to define force progression in crank-type mechanism from the set parameters of the cylindrical unit. Furthermore, the design of the possible balance of this crank-type mechanism with one balancing shaft was realized. The calculations of torsional vibration and stress analyses of the designed crank-type mechanism were realized too.
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14

Balash, Ievgen. "Tříválcový řadový zážehový motor." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231050.

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The main aim of this master’s thesis is to design the powertrain of turbocharged threecylinder in-line gasoline engine based on given parameters. The work introduces three variants of balancing of inertia moment of rotating masses and balancer unit of first order moment of inertia of reciprocating parts. The thesis also presents calculation of torsion vibration of the powertrain and structural design of the rubber damper. In conclusion a stress analysis of the crankshaft is submitted with and without torsion vibration damper.
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15

Paclík, Tomáš. "Design přepravníku dřeva s ručním ovládáním." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230962.

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Subject of this thesis is design of a timber trailer with manual control. The designed timber trailer is one of the small machines that are used for a low–volume timber production. This timber trailer operates in a rough terrain – its outstanding feature is the ability to operate on steep slopes and overcome obstacles. The concept of the control system and the safe seating of a driver are contributions to the field of ergonomics. This machine is considerate of a forest environment because it minimizes formation of soil erosion. Easy washability and maintenance are other criteria of this proposal. The functional point of the design is firmed by the purposeful and aesthetic shaping which is unique in this category. Comparison of the proposal presented in this thesis with available machines demonstrates that work of designer is indispensable part of a machine development process.
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16

Koumar, Martin. "Zadní rám lesní vyvážečky L520." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2013. http://www.nusl.cz/ntk/nusl-230477.

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This master’s thesis deals with strength analysis rear frame of forwarder LVS 520 and propose modifications of this frame. The main part of this work is strength analysis of the supporting frame of the original construction by the help of the finite elements method. Further the design of suitable structural modifications and strength analysis of the modified construction of frame. This master’s thesis has been prepared with Strojírna Novotný s.r.o. company cooperation.
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17

Faiman, Jiří. "Tříválcový zážehový motor s excentrickým klikovým mechanismem pro osobní vozidla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-231763.

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The first part of this thesis deals with the examination of the eccentricity of the crank mechanism for individual variables kinematics and dynamics of crank mechanism, analyticaly computed in Matlab. Then it compares the different possibilities of balancing moments of inertia forces and propose a specific design chosen for the value of eccentricity. In the second part is designed a model of crankshaft mechanism based on the investigated parameters. These parameters were carried out by structural analysis in Ansys.
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18

Knor, Pavel. "Teplotní pole pryžového tlumiče zážehového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229439.

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The main aim of this master’s thesis is to design the drivetrain of four-cylinder gasoline internal combustion engine with torsional vibration rubber dumper. For the basic parameters of the engine are designed two optional crankshafts. Crankshaft with eight counterweights and crankshaft with four counterweights. The thesis also includes modal analysis of the crankshaft using FEM, and design of the main dimensions of the dumper. The following part describes the calculation of force torsional vibration and safety factor solution of crankshaft fatigue using FEM. The final calculation is of the temperature field in the rubber dumper in selected operating modes.
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19

Svoboda, Jan. "Pásový podvozek lesního vyvážecího stroje." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241672.

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The thesis describes the design of a modular track undercarriage system for a forest utility vehicle called the forest forwarder. In the introduction there is a research study which reviews a variety of design options. The main part of the thesis describes the 3D model created in the Catia V5 programme. The model was subjected to an analysis of dynamic effects by simulated use of the track undercarriage system in the MSC Adams programme. A selected part of the undercarriage was analyzed by the finite element method in the Ansys Workbench programme. Drawing documentation of some of the components is included at the end of the thesis.
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20

Tylš, Ladislav. "Získávání dat z kamer." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217760.

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This thesis describes the principles of making application which is able to set and control camera. The first part describes basic camera connections and it explains definition and specification of camera’s features. The second part of my thesis describes implementation of application, which can use more cameras to image preview, image acquisition and to simply set of camera’s features. To implement the applications we can use MATLAB and C++BUILDER uses opencv libraries.
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Klus, Lukáš. "Armatury v otopných soustavách." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372198.

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The theme of this diploma thesis is fittings of heating systems and it is divided into three parts. The first part deals with this topic on theoretical level. In the second part, there is a calculations and drawings that deals with heating and water heating of the apartment building in Uherské Hradiště. This part is solved in two variants concerning hydraulic balancing and regulation of the heating system. The last part of the thesis is an experimental solution and processing of pressure loss results of selected valves. These results are compared with the values reported by the manufactures of the valve.
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Plucarová, Markéta. "Leadership v malých a středních podnicích." Master's thesis, Vysoká škola ekonomická v Praze, 2017. http://www.nusl.cz/ntk/nusl-359142.

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The aim of this master´s thesis is to capture and describe the perceptions and opinions of selected entrepreneurs on leadership in small and medium enterprises. In the theoretical part is outlined the development of leadership, its characteristics, styles and approaches. Among the approaches are the Situational leadership II, Transformational leadership, Authentic leadership and Versatile leadership. Using qualitative research through a semi-structured interview and a written survey, the main factors of the selected approaches that are most frequently encountered in the management of the respondents are described, and the use of the given approach relative to the whole sample is then evaluated. In conclusion, this work focuses on the individual assessment of the versatility of the styles of selected entrepreneurs.
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23

Horký, David. "Středové kloubové uložení lesního vyvážecího stroje LVS511." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2015. http://www.nusl.cz/ntk/nusl-232134.

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This diploma thesis deals with stress analysis central joint of forest forwarder LVS 511. Stress analysis has been performed by finite element method (FEM) using the program NX I-deas. The diploma thesis was conducted in cooperation with the firm Strojírna novotný s.r.o.
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Herold, Radek. "Bytová zabezpečovací ústředna." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2010. http://www.nusl.cz/ntk/nusl-218305.

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In the opening part of this thesis, the reader is briefly introduced into safety technique devices. There are basic types of security sensors discussed together with the most common methods of their connection with the security central. Further text focuses on elaborating the main topic of this thesis - the design of home security central equipped with a WiFi interface.
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Bürger, David. "Konvertor pro příjem digitálních družicových snímků v pásmu L." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-316413.

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Down converter is a mixer which have a three ports. Two ports are refered as input ports and one port is ouput. One input port is connected to a signal which is transmited by meteorological satellites at frequency 1,7 GHz this frequency falls within the L–band. Meteorogical images are trasmited in L-band. The second input port is connected to a local oscillator in this case voltage control oscillator. The output signal includes sum and differential products, for down conversion is logically used differential product. Down conversion is used to convert data that are transmitted at high frequency to lower frequency which can be futher processed and then displayed data on the end device.
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Pejchal, Luboš. "Akviziční jednotka pro zabezpečovací techniku." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2012. http://www.nusl.cz/ntk/nusl-219850.

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Project is focused to development of security unit for security of homes, flats and other similar spaces against intruders (thieves). Design is focused to solution of hardware and firmware for security units and their control software for PC. Hardware design solve supply over ethernet PoE, backup of supply, connection securities sensors to security unit. Firmware prevents failure of units and it is communicating with sensors and PC. Software in PC provides settings of security units, deactivating of alarm and measure temperature by security unit.
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Kúšik, Lukáš. "Electronic Flight Bag." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2021. http://www.nusl.cz/ntk/nusl-449169.

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Cieľom tejto diplomovej práce je vytvoriť Electronic Flight Bag (EFB) aplikáciu pre mobilné telefóny s operačným systémom Android. Pre splnenie tejto úlohy bola preskúmaná aktuálna legislatíva ohľadom EFB aplikácií spolu s najmodernejšími EFB aplikáciami dostupnými na aplikačnom trhu. Na základe týchto informácií je navrhnutá a implementovaná EFB aplikácia určená pre pilotov všeobecného letectva. Výsledný produkt obsahuje funkcie pre plánovanie letu, vlastnú leteckú mapu, pilotný denník, katalóg letísk s dátami z celého sveta a ďalšie. Podpora offline zaručuje funkčnosť v reálnych podmienkach letu. Konečný produkt sa taktiež snaží inovovať nad existujúcimi EFB aplikáciami zahrnutím funkcionalít, akými sú napríklad automatické kontrolné zoznamy a náhľad v rozšírenej realite.
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Moreira, Vieira Gabriel. "Role západních médií při vyvážení revolučního potenciálu OWS a Los Indignados." Master's thesis, 2020. http://www.nusl.cz/ntk/nusl-415069.

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Anti-hegemonic social movements have historically had a complicated and conflicting relationship with mainstream media, as it consistently undermines the emancipatory potential of these grassroots revolutionary movements, hence serving the interests of the dominant social forces of the hegemonic order. This work develops a comprehensive and critical analysis of the agency of mainstream media throughout the coverage of Occupy Wall Street (OWS) to understand how and why it consciously and relentlessly worked to neutralize the true dimension of the movement and its occupations, and thus to preserve the neoliberal capitalist world order from the ideological threat and the revolutionary challenge that OWS posed to it. Employing a historical materialist approach based on Gramsci's theory of hegemony - and the emphasis in the consensual aspect of power in the production of the hegemony that it entails - and its use in the study of world orders grounded in social relations, this work aims to investigate the mainstream media's active role in the building of the current neoliberal capitalist historic bloc, and its subservience to the hegemonic social forces throughout every stage of the coverage of OWS and its occupations: from the deliberate lack of interest and the total indifference in the movement to the...
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JANEŠÍKOVÁ, Michaela. "Vliv frekvence vyvážení obsahu nádob pro tříděný odpad na intenzitu třídění komunálního odpadu obyvatelstvem." Master's thesis, 2011. http://www.nusl.cz/ntk/nusl-55428.

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The thesis is evaluating the influence of frequency balance of containers for sorted for sorted waste for the intensity of sorting in two locations in České Budějovice. The influence was examined using three independent methods (monitoring the filling of containers ? by a balancing caluclation ? by a questionnaire) At the assessment of the impact of collection frequency to the selection account was taken of the following criteria: full containers at the time of collection, walking distance of population to the containers for sorted waste, type of buildings in the monitored area, sorted waste containers capacity, the amount of sorted waste, population per one collection point, etc. The results showed that the level of sorting of mixed waste in České Budějovice is not at good level. Collection frequency of sorted waste is sufficient and is not limiting to the intensity of sorting. For the efficiency of collection there is proposed tu optimize the placement od containers for sorted waste, to consider a different system off collection for residential areas, to introdukce a special containers for sorting of PET bottles and to raise form filling of paper containers by englightenment.
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Doan, Phu Nguyen. "Nové vyvážení v asijsko-pacifické oblasti: nové skutečnosti v tradičních aliancích USA v regionu." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-357318.

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The thesis seeks to examine the development of the US-Japan, US-South Korea, and US- Australia alliances, during the implementation of the rebalance to Asia policy under the Obama administration. It discusses the application of three major international relations theories, realism, liberalism, and constructivism, in studying the causes and effects that resulted in different outcomes across the three dyads, from security, economic, and cultural perspectives. To establish a causal relationship, the thesis employs a qualitative case study method, controlled comparison, to test the theories and identify the factors that play a decisive role in determining the differences. It then concludes that between the three alliances, it was the rational choice of policymakers, focused on state survival and economic interests, that influenced state behaviour in cross-border relationships. The US alliances in Asia-Pacific have been operating mainly on pragmatic foundations and principles, to serve strategic purposes, and have little to do with normative, ideational factors. Keywords Asia-Pacific, alliance, economic interdependence, foreign policy, hegemony, national identity, rebalance, security threat
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Cwik, Jana. "Zajištění bezpečné a vyvážené výživy v zemích jihovýchodní Asie." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-425677.

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This thesis deals with alimentary diseases in selected countries of Southeast Asia. The theoretical part of the thesis describes food safety and nutritional sufficiency, which is often related to individual alimentary diseases. They are divided according to the originators of the disease to viral, bacterial and parasitic. The ways of the most common transmission of the disease agent, their progression, prevalence and incidence in the three selected countries of Southeast Asia (Malaysia, Thailand and Myanmar) are described for the following diseases: rotavirus infections and hepatitis, cholera and typhoid, schistosomiasis and taeniasis. Important risk factors that significantly affect the occurrence of these foodborne diseases are defined in the thesis. The most serious foodborne diseases in Southeast Asia are typhoid fever, norovirus infections and hepatitis A. The most effective preventive measures are vaccination programs, improved personal and communal hygiene and access to safe water.
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Suda, Ondřej. "Posouzení provedení prvních probírek dle velikosti použitého harvestoru s dopadem na budoucí růst a potenciální výnos z porostů." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-431182.

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The thesis deals with the appropriateness of using two different combinations of harvester´s system for stand tending. The aim was to quantify differences using harvester´s system and found out which is more appropriate for intervention. The difference in the number of felling trees is using as key parameter. According to results is better for future development of stand using harvester´s which will create closer segmenting lines. The rest of trees in stand mean greater possibility of selection for subsequent thinning and higher possibility of yield in other interventions due to greater volume.
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33

Mutina, Michal. "Identifikace a posouzení faktorů ovlivňujících okamžité tlaky v půdním profilu vyvolané přejezdy vyvážecího traktoru." Master's thesis, 2016. http://www.nusl.cz/ntk/nusl-361936.

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In forestry are used heavy wheeled machines which create noticeable pressure on the soil by landing gear. Traversing machines cause damaging roots, root swellings and especially soil compaction. This thesis deals with the assessment and comparison of factors affecting the immediate pressures in the soil profile caused by crossing forwarders. Two machines are considered, the first one with load capacity 5t and the second one with load capacity 12t. The technical features of the machine, tire width, tire inflation rate and technological influences, putting brushwood on the path of crossing forwarder were assessed. The results indicate that the use of logging residues on the path of forwarder effectively reduces the immediate pressures in the soil.
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34

Náprstek, Tomáš. "Výživové návyky u dětí základních škol druhého stupně." Master's thesis, 2019. http://www.nusl.cz/ntk/nusl-396306.

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Problematika výživy u dětí v rámci školní docházky je stále aktuální a upoutává pozornost. Obezita u dětí se stále zvyšuje. Je mnoho publikací na problematiku obezity u dětí a s tím spojený vyšší počet úrazů a vyšší problematika pozornosti (ADHD, ADD a jiné poruchy). V České republice se stále více vyskytují děti s obezitou, nezdravým životním stylem, který doprovází i nedostatek pohybu. Tyto faktory vedou ke zhoršení fyziologických funkcí, zatěžování statického a pohybového aparátu člověka a v neposlední řadě ke špatnému psychickému stavu jedince. V diplomové práci se zaměřím na stravování při školní docházce a možné stravovací návyky, které mohou přispívat k dětské obezitě, častějším zdravotním problémům. Pomocí anketního šetření práce zjistím, jak se stravují žáci základních škol na Slánsku (Základní škola Slaný, Komenského náměstí 618 a Základní škola Smečno, okres Kladno) při pobytu ve škole. Klíčová slova škola, snídaně, výživové návyky, obezita u dětí, prevence, vyvážená strava ABSTRACT The issue of children's nutrition in school attendance is still up to date and attracts attention. Children's obesity is increasing. There are many publications about children's obesity and associated with that higher number of accidents and higher attention issues (ADHD, ADD and other disorders). There are...
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35

Klepárník, Jan. "Příprava, vlastnosti a využití tuhých biopaliv -- vybrané aspekty." Doctoral thesis, 2013. http://www.nusl.cz/ntk/nusl-249320.

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This PhD thesis deals with problems covering production of pallets and chunky wood, using small-scale technologies. There are particularly solved issues focused on fuel embedded energy and return on investment. Further, solid biofuels properties are discussed, and then the study of solid biofuels use in small hear sources was made being focused on the Czech Republic conditions. Particular attention is paid to problems with automatic pellet ignition. The last part is devoted to presenting partial results of a forwarder prototype, which is being solved currently.
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36

Černý, Lukáš. "Technicko-ekonomické parametry harvestorového uzlu s mobilním trakčním navijákem." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-430921.

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The dissertation explores the work with harvester technology with a mobile traction winch in sloping terrains. It deals with the efficiency of these machines in their technological varieties. A time measurement study was undertaken in the dissertation which studied the work of a harvester with a mobile traction winch and without a mobile traction winch during the toll logging of a centennial spruce stand. The time study was performed in eastern Slovakia to establish the differences in time consumption during the work cycles. Some minor differences had been detected during work tasks, however, these did not exhibit any effect on the mobile traction winch in the work cycles of logging one tree. Furthermore, the time study measured the effect on any changes in work productivity, which is required during the operation of the mobile traction winch. Besides the harvester, a time study of a forwarder with a mobile traction winch has been compiled. To establish the effect on the forrest environment of the harvester technology and the mobile traction winch, an evalution of damage to the soil in two technological varieties was performed in Slovakia and the Czech republic. The technological variety with a mobile traction winch was less damaging to the soil surface due to the prevention of wheel slipping destpite the fact that the overall results of soil damage were negative. An operating cost analysis has been worked out to complete the study, which has shown the technological variety with the mobile traction winch to be more costly due to the purchase price of the winch and the higher fuel consumption. The main advantage, however, is safety, not cost savings.
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37

Vrátná, Petra. "Drženích redukčních diet u žáků druhého stupně na vybrané základní škole." Master's thesis, 2017. http://www.nusl.cz/ntk/nusl-353244.

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The diploma thesis aims the attention on reduction diets at pupils at choosing school. The teoretical part describe the development of the pubety age, the accurate regime according to the pupils' proces, the types of reduction diets, the alternative food and the following motion aktivity. The thesis deals with the illneses, which can be caused by reduction diets, which are kept quite often. At the end of the teoretical part it is manchened the under topic the reduction diet, which is involved in the part Health Education and PE of the topic according to the the Framework Education Programme and the School Education Programme ZŠ Dobiášova. The issue that conception of educational lesson aim on reduction diets, alternative way of eating and the illneses, that can be caused by reduction diets The practical part of thesis contains the amount of pupils in second level of primary school (6. - 9. grade) who keep or kept reduction diet at choosing liberecká school, afterwads there were the conversations with the choosing pupils which lead solving, why pupils want to be on diet and what is the reason to be on diet. To gain the information is used the quantitative approach of questionnaire survey and then the structured conversation that is led with choosing pupils, then there is created the preparation of...
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38

VOKÁČ, Otakar. "Vliv těžebních technologií na lesní ekosystémy v Národním parku Šumava." Master's thesis, 2010. http://www.nusl.cz/ntk/nusl-53775.

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The consequence of the differentiation of a care of forest ecosystems in NP Šumava is the existence of localities where timber harvesting causes damage to forest ecosystem. One of the most affected ecosystems is the soil ecosystem. The surface is usually disrupted by numbers of passing over the same path the machines. Forwarders are the harvesting machineries that execute the largest number of passes in the forest. The aim of the diploma work is to gain and analyse data dealing with harvesting technologies, and to evaluate their impact on soil ecosystems. The impact was determinate from measuring of the recessing of the track in the surface, of the soil compaction and of the soil sampling for determination of an amount of the water in the soil. The data were measured in different selected localities in NP Šumava. The negative influences of the harvesting technologies were defined for both {--} water and air regime of soil. Recommendation for reduction of negative consequences of the harvesting on soil are parts of diploma work as well.
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