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A traction drive for an electric bike with motor "Heinzmann"
Němec, Petr ; Huták, Petr (referee) ; Vorel, Pavel (advisor)
This work deals with a proposal and construction of a DC/DC converter for a control of a DC motor Heinzmann. The DC/DC converter will be used in an electric drive for a bicycle. The proposal of the DC/DC converter is designed for such engine power to avoid fully any human force to drive - pedaling. The work includes informations about the used motor, progress of proposal and dimensioning of the converter - power circuit and control electronics.
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Technical Improvement of Rented Property
Němec, Petr ; Ondroušková, Renata (referee) ; Svirák, Pavel (advisor)
The bachelor's thesis deals with the problem of technical improvement of property that is the object of a lease contract. Lessee pays technical improvement from own resources and he is entitled to depreciation of technical improvement on the basis of a written contract by owner. The practical part focuses specific various options for the settlement of technical improvement at the end of the lease and it assesses the convenience of termination from the perspective of the lessee.
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Design of exhibition hall roof
Němec, Petr ; Ing.Paris Chalivopulos (referee) ; Zich, Miloš (advisor)
The Diploma’s thesis is focused on the design of selected parts of reinforced concrete exhibition hall (prestressed concrete purlin, prestressed concrete girder, reinforced concrete column, reinforced concrete footing, post-tensioned concrete girders). The load calculation (the self weight, the permanent load, the wind load, the snow load and imposed load), the design and the review of selected reinforced concrete items and the drawing documentation are included in this thesis.
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The belt conveyor for transportation of aggregates
Němec, Petr ; Malášek, Jiří (referee) ; Kašpárek, Jaroslav (advisor)
This thesis deals with the concept of design solutions of conveyor belt. The aim of this work is to design a conveyor belt to transport gravel and gravel into three fractions by warehouse space, traffic performance of 50 000 kg• h-1, 4.5 m height difference. Design of the main dimensions, draft power and strength calculation of frame construction. Functional calculation is performed according to ISO 5048 of 1994. The work is accompanied by drawings.
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Creation of Logistic Concept in the Selected Company
Němec, Pavel ; Basel, Martin (referee) ; Jurová, Marie (advisor)
The master’s thesis is focused on the issue of logistic concept in the company BKR ČR, s. r. o. It provides a theoretical background for the topic and observes the current situation in the company. Proposed measures are based on the critical analysis in order to increase efficiency and effectiveness of company logistics and customer satisfaction.
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The Studies to Eliminate the Risk of Occupational Safety
Němec, Pavel ; Basel, Martin (referee) ; Jurová, Marie (advisor)
The bachelor’s thesis is focused on the issue of health & safety of the workplace. It provides a theoretical background for the topic and observes the current situation of work safety in the company. It also includes an analysis of risks in the workplace of packaging line, based on which subsequently proposes measures to minimize risks and improve safety.
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Self-organizing MESH wireless networks
Němec, Petr ; Burget, Radim (referee) ; Růčka, Lukáš (advisor)
This master thesis deals with self organized Mesh network. It describes routing and particular routing protocols, which are used in these networks. The thesis deals with Mesh network QoS assurance. Analysis and theoretical background of Mesh networks, routing and router protocols are included in the first chapter. Basic models of assuring Quality of Service are also described. Those are Best Effort, IntServ and DiffServ. Second chapter describes the devices used in the specific Mesh network topology - Trospos 5210 MetroMesh router produced by Motorola Canopy. Basic settings and properties required to establish a Mesh network are described. Next part of the thesis is the design implementation, which involves creation and configuration of the Mesh Network. Network configuration consisting of two Gateway points and afterwards behaviors of the network in a steady state versus one gate failure are compared. Furthermore, implementation of QoS according to components that support two types of QoS assurance regarding type of bandwidth reservation and defined traffic classes. In conclusion, the thesis describes measurement methods of QoS parameters for chosen applications, evaluation and comparison of measurement results for both types of Quality of Service assurance.
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Tax Havens
Němec, Pavel ; Venhoda, Ondřej (referee) ; Kopřiva, Jan (advisor)
The thesis deals with the issue of tax optimization through the tax havens. The first part of this thesis contains definitions of the key terms related to the issue. The second part deals with the history of tax havens and describes the current fights against them. The particular countries which belong to the tax havens are concretely analyzed in the next part of this thesis. The countries are organized into the groups by the possibility of using them in specific types of business in the fourth part.
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Electronically adjustable active load for support of laboratory work – feasibility of an implementation
Němec, Pavel ; Hruboš, Zdeněk (referee) ; Šotner, Roman (advisor)
This master’s thesis deals with active electronic loads focusing mostly on alternating input signals. The principles and modes of both DC and AC loads are described, as well as the most important parameters of MOSFET transistor which is used as the main power component. It deals with designing a regulation circuit of an AC load in detail. This work also discusses the possibilities of realisation of the remaining parts of the device. At the end of the thesis the function of the designed regulation circuit is verified by simple measurements on a prototype.
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The Analysis of impedance properties of the bridge in string instruments
Němec, Petr ; Nop, Patrik (referee) ; Jirásek, Ondřej (advisor)
It is a known fact that stringed instruments bridge makes an important part of "acoustic circuit" of their bodies. Bridge acts as an acoustic filter which has the biggest impact on 2 – 6 kHz band and high frequency bands. To find the connection between the impact of a specific acoustic and mechanical properties of a bridge and acoustical behavior of the entire instrument remains as a matter of further exploration. Aim of this thesis is to find the mentioned relations of a chosen materials in an accordance to their mechanical properties within a full range of materials with common bridge properties. The experiments are designed to determine mechanical and acoustic properties of chosen materials which are then used to fabricate bridges. Subsequently the acoustical behavior of instruments with chosen bridges is determined. Based upon these findings we propose specific solutions and suggest further research.
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