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Signalling system No. 7 implementations for Asterisk
Janíček, Martin ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
Semestral project describes signaling system number 7, it's settings options and options of signaling over IP networks, especially two transport protocols SCTP and BICC for signaling SS7 over IP. Analyses kinds of implemetations of this signaling system to the Asterisk PBX with TDM E1 card support. Further part of this work is dedicated to the open source implementations libss7 of Digium and chan_ss7 which is currently developed by Dicea. Describes in detail their installation to the open source PBX Asterisk including testing of both and comparing these two open source solutions. Last part is focused on realization of gateway which converts communication from TDM network to IP network. For this part, three computers are used. First as SS7 signalling end softswitch, second as SIP signalling end softswitch and last as gateway between them. This gate works as interface between SS7 signalling and SIP signalling. Testing call was realized successfully for both directions.
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Surface Condenser
Janíček, Martin ; Brázdil, Marian (referee) ; Fiedler, Jan (advisor)
This diploma thesis deals with design of surface condensers with axial steam inlet which are widely used in the energy industry. In the practical part, hydraulic and heat calculation, dump-tube design and calculation of by-pass were made to design surface condenser with axial steam inlet. Two types of surface condenser were designed in order to compare impact of two different heat transfer tube materials. Stainless steel and copper-nickel alloy were used for condenser calculation. Stainless steel and copper-nickel alloy condensers were compared in order to weight calculation and condenser price estimation.
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Favorit automobile - a milestone in the history of Škoda
Janíček, Michal ; Kučera, Pavel (referee) ; Píštěk, Václav (advisor)
The research of this bachelor thesis is focused on the development of the automobile Škoda Favorit. The introduction opens with a brief overview of the history of the mark Škoda. The main part of the work deals with a treatise on the development, the use of innovative components as well as on the final examination of lifetime and safety of the model Favorit. The vast part of the thesis is dedicated to the period from the first presentation of the new car towards the motoring public until the end of its production. Moreover, there is mentioned the introduction of the Škoda automobile factory to the Volkswagen group. In addition to that, there are included some information about the position of this car at present automobile market and its contribution to the subsequent development of the car factory is evaluated at the end of the thesis.
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Supercharged SI engine
Janíček, Michal ; Bazala, Jiří (referee) ; Beran, Martin (advisor)
The diploma thesis deals with the selection of an eligible supercharger for cooperation with the internal combustion SI engine Honda K20A2. The first part is dedicated to the research referring to an issue of charging and a brief description of particular supercharger types. However, the main part of the thesis consists in the formation of proposal calculation and the tentative choice of the eligible type of supercharger. The part of the work is also the description of the assigned engine and the measurement of its parameters. The most extensive part of the thesis deals with the making of computational model of the atmospheric and supercharged version of the engine and the consecutive simulations in the GT-Power software. Finally, gained results are evaluated and the computational study of the cooperation of the selected supercharger with assigned combustion engine is made in the last part of the diploma thesis.
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Sodium steam generator for experimental stand
Janíček, Martin ; Nerud, Pavel (referee) ; Šen, Hugo (advisor)
This thesis deals with the experimental liquid sodium heated steam generator. The first chapters describe the many aspects that should be taken into account when designing this type of steam generator. Furthermore, is approximated in the proposal the work itself. On the basis of thermal, hydraulic calculation of strength and was chosen one preferred option. In conclusion, the best option is evaluated steam generator sodium-water and the possibility of realization.
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Increasing the Yield of BGA Repair Process
Janíček, Martin ; Vala, Radek (referee) ; Řihák, Pavel (advisor)
This thesis deals with possibilities of increasing the yield of BGA repair process. First there is mentioned basic problematics and its notions, problems and possibilities. Next it deals with technological aspects of repairing of devices in BGA covers. Also there is mentioned basic problematics of evaluating of yield. There is stated current state of solving the problem and also there is suggested new design of application which would be more optimal for evaluation of the yield of process. This thesis contains results of practical testing of methods of application of flux affecting final quality of solder joints as well as kind of flux which was used. At the end
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The technology of ceramic filters as a problem of their shaping
Dobrovolná, Martina ; Janíček, Martin (referee) ; Sokolář, Radomír (advisor)
The aim of this bachelor thesis is to evaluate possible production of ceramic filters made by dry pressing and to choose suitable granulate and its optimal moisture proper for this way of production. The theoretical part of the thesis explains the meaning of the usage of ceramic filters in a foundry industry. Further more, the technology of ceramic mixtures production and the technology of ceramic filters production made by wet pressing and dry pressing is drawn near in this thesis. The practical part describes the production process and the testing of experimental samples. The influence of different kinds of ceramic mixtures, their moisture and different modes of burning is compared to physical-mechanical features of ceramic potsherd. The output is to design a material with a set of typical features which would by suitable for dry pressing production.
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Thermal aging of nanocomposites
Janíček, Martin ; Rozsívalová, Zdenka (referee) ; Polsterová, Helena (advisor)
This thesis deals with issues of properties of nanocomposites and it´s heat aging. In the first part there are theoretically analysed some of the basic therms connected with nanocomposites. Also there are outlined basic methods of production of these matherials. The most important is specification of individual properties when bigger attention is gived to electrical properties. Practic part deals with heat aging of samples of nanocomposites filled with nanoparticles Al2O3. There was monitored impact of time of aging on values of internal resistance, dissipation factor and relative permitivity.
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Správce souborů v přirozeném jazyce
Janíček, Miroslav ; Bojar, Ondřej (advisor) ; Klimeš, Václav (referee)
In this work we present NLSH, a file manager for UNIX-like operating systems with user interface in written natural language. NLSH is a context-aware dialogue system capable of basic anaphora resolution; it uses currently-available tools for automatic conversion of sentences in Czech language to tectogrammatical dependency trees based on the framework of Functional Generative Description. The dependency trees are then interpreted using a formal querying language based on propositional logic. We describe the design, architecture and limitations of the whole system as well as of the interpretation mechanismand querying language.
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Kontinuální plánování pro zajištění vzájemného porozumění v situovaném dialogu
Janíček, Miroslav ; Kruijffová, Ivana (advisor) ; Hajičová, Eva (referee)
The work investigates the problem of grounding-adding to common ground - in situated human-robot dialogues. Common ground, a special kind of mutual understanding among dialogue parties, is essential for any joint activity and as such is central to any interaction. In our approach, we treat dialogue just as a part of a wider collaborative activity, extending Thomason et al.'s approach to dialogue modelling based on abductive reasoning. Our system performs abduction over agents' (i.e. dialogue participants) beliefs, similarly as in the related field of multi-agent planning. We define beliefs as relational structures that are assigned a modal-logical semantics and show how common ground is achieved and maintained using these structures. Finally, we present an implementation of the system in a cognitive architecture of a robot in a scenario where the robot learns a correct model of a visual scene in a collaboration with a human tutor.
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