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On the cutting performance of selected HSS drills
Med, Slavomír ; Dvořáková, Jana (referee) ; Píška, Miroslav (advisor)
The bachelor thesis aims on a twist drill. In the theorical part characterizes the parts of drill bit and presents its fabrication from fabrication of cutting material to coating. This part finishes by description of contemporary methods of measuring of cutting performance. The main goal of this thesis is to propose and realize measuring of cutting performance of which results we can compare selected HSS drill bits and recommend them to practice. The tests are described in the practical part which contains the evaluation of results too.
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Design and implementation of an IMS network with extended functions using Open IMS Core.
Šulgan, Peter ; Šilhavý, Pavel (referee) ; Ježek, Jiří (advisor)
The bachelor thesis focuses on the architecture of the IP Multimedia Subsystem, its main elements and extension functions. It also deals with the implementation of the IMS network in the simulation environment Open IMS Core, which is also briefly described. The first chapter describes the IMS architecture divided into layers and it also defines the basic elements such as CSCF and HSS. In addition, it briefly characterizes the most commonly used communication protocols and the structure of identity in IMS. The second chapter deals with the open source environment Open IMS Core, it briefly defines the individual parts and contains a list of configuration files. The third chapter introduces the additional services offered by the IMS architecture. It characterizes their basic functions and their way of working. The fourth chapter focuses on the practical part of the bachelor thesis. It describes configuration procedure of the Open IMS Core and testing of its functionality. It is divided into four sections according to the individual configuration steps.
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Optimalization of cutting process for machining of aluminium profile on CNC centre
Král, Ondřej ; Fiala, Zdeněk (referee) ; Jaroš, Aleš (advisor)
This master‘s thesis deals with the suggestion of suitable tools for milling aluminum alloys profiles for the construction of aperture fillings and their aplication to a CNC machining center for increasing the efficiency of the cutting process. The first part of the thesis is focused on the description of the company and the workplace of production of aluminum alloys constructions. The following pages contain description of standardized products, which are used to identify the test profile that is part of the experimental verification. Next part of this thesis is characteristic of aluminum alloys and tool materials suitable for their machining. Second part of this work contains an analysis of the current state, suggestion of new cutting tools and their application to the production proces. At the end of this thesis there is the technical-economic evaluation that deals with the time and economic savings of the applied design.
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HSS end milling cutters with PVD coatings and their use in practice
Vondra, Jiří ; Slaný, Martin (referee) ; Jaroš, Aleš (advisor)
This diploma thesis deals with the durability of PVD coating in front groove milling. In the theoretical part there is the analysis of high-speed steels, a survey of milling and an overview of coating methods. The experimental part is focused on the power ratios during milling with a router cutter and its wear. From the experiment it is possible to conclude that nanocomposite coatings reduce cutting forces, but do not produce the most durable tool under the cutting conditions.
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VoLTE service implementation in EPS-IMS networks
Baev, Mikhail ; Koton, Jaroslav (referee) ; Novotný, Vít (advisor)
Diplomová práce popisuje VoLTE službu, vývoj a nasazení LTE (zaváděcí fázi, skutečný LTE stav a výhledy do budoucna atd.), EPC-IMS architekturu (popis funkce uzlu, rozhraní atd.) Komunikace mezi uzly a funkce, rozhraní a protokoly jsou používány v průběhu signalizace (SIP SDP) a datový tok (RTCP RTP). Práce stručně popisuje základní toky hovorů, typy nosičů (GBR and N-GBR), a to vytvoření / mazaní nosičů během komunikace. Další část diplomové práce o implementaci volte, instalace a konfigurace IMS. Závěrečná část diplomové práce popisuje zkoušky sítě a, analýzu protokolu.
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The Study of Selected Technological Improvement Operations
Velešík, Martin ; Brhel, Josef (referee) ; Jurová, Marie (advisor)
The thesis is focused on improving a chosen technological operation in the M&V, spol. s r.o. company and its production division – STIMZET s.r.o. An analytical comparison of both the current and the proposed technology is made, using direct costs of the actual tech operation and the length of the operation. The result of the thesis is a suggestion of choosing the more useful technology – either the new or the current.
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Methodology of testing IP Multimedia Subsystem
Karlík, Martin ; Novotný, Vít (referee) ; Nagy, Ľuboš (advisor)
Karlík, Martin Department of Telecommunications, Faculty of Electrical Engineering and Communication, Brno University of Technology. Methodology for testing IP Multimedia Subsystem The aim of this work is the study, analysis and description of the IMS network architecture mainly IMS core layer and application layer, i.e roles and cooperation among elements of P-CSCF, S-CSCF, I-CSCF, BGCF, MGCF, HSS, SLF, application servers and end terminals. Analysis of presence services , setup of headers of SIP messages during makeing service provideing informations about accessibility of clients and iFC criteria.Furthet project is focused on the implementation of the IMS network based on the Open Source SIP Server Kamalio, Open Source IMS Core System FhoSS, creation tests scenarios for presence services and test-bed for IMS.
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VoLTE service implementation in EPS-IMS networks
Baev, Mikhail ; Koton, Jaroslav (referee) ; Novotný, Vít (advisor)
Diplomová práce popisuje VoLTE službu, vývoj a nasazení LTE (zaváděcí fázi, skutečný LTE stav a výhledy do budoucna atd.), EPC-IMS architekturu (popis funkce uzlu, rozhraní atd.) Komunikace mezi uzly a funkce, rozhraní a protokoly jsou používány v průběhu signalizace (SIP SDP) a datový tok (RTCP RTP). Práce stručně popisuje základní toky hovorů, typy nosičů (GBR and N-GBR), a to vytvoření / mazaní nosičů během komunikace. Další část diplomové práce o implementaci volte, instalace a konfigurace IMS. Závěrečná část diplomové práce popisuje zkoušky sítě a, analýzu protokolu.
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On the increase of cutting performance of thread cutting taps with PVD coatings
Grygárek, David ; Fiala, Zdeněk (referee) ; Píška, Miroslav (advisor)
This diploma thesis deals with HSS cutting taps performance in combination with very hard and tribological PVD coating application and their contribution to increasing of cutting properties. Then is described the mechanisms and forms of cutting tool wear. The goal of the experimental part of the thesis was determine, compare and subsequently evaluate cutting properties of threading tools using taps with different types of PVD coatings. During realization of the experiment, constant cutting conditions have been ensured and the only variable were the different types of coating layers. The result of the experiment was measurement of cutting torques depending on time and rate of wear of cutting tools. Measured value are statistically processed and drawn conclusion.
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Application of PVD coatings for milling
Matuška, Martin ; Sedlák, Josef (referee) ; Píška, Miroslav (advisor)
This dissertation treats of the influence of PVD coats to a change of tool lifetime. The theoretical part of the dissertation describes the adjustment of tools before the process of coating. Following part describes the specific properties of deposited layers of the coating and its measuring. There is also the enumeration and specification of selected ways of depositing PVD coats and brief description of its advantages and disadvantages. Second part of the dissertation is focused on an experiment with measuring of the tool force loading and its change depending to the tool wear. There are compared four short four-edged milling cutters with a coat and as well without it. Those tools were made of high speed steel by the conventional way and also by the powder metallurgy. Milling operation was done by down and up milling technique. The evaluation of the experimental results for powder metallurgy tools confirmed that these tools are advantageous compared to the standard high speed steel tools.
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