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QoS in IP network with the help of OMNeT++ simulation tool
Hudec, Lukáš ; Mlýnek, Petr (referee) ; Růčka, Lukáš (advisor)
The content of this thesis is giving information about the network simulator OMNeT++ and its superstructure INET Framework. In this thesis a sample simulation of IP network with the help of simulation package INET Framework is realized on this theme. The thesis also deals with analysis of possibilities, how to assure quality service in IP networks and subsequently implementation quality of service in surrounding of network simulator OMNeT++ and its superstructure INET Framework. The implementation is accomplished by two methods. The first method is implementation of differential service, in other words DiffServ, with the help of change the behavior of output. This change rest in sorting of data packets to different queues by their device priority. The second method shows principles of the technology MPLS and also function code protocol OSPF. The MPLS technology is realized by special routers with implemented moduls reservation protocol.
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Audio amplifier controlled by the IP protocol
Dvořák, Petr ; Schimmel, Jiří (referee) ; Kouřil, Jiří (advisor)
The bachelor thesis is intent on projection and realization of a device whitch is capable of communicate with a remote client through the Ethernet making use of the protocol set TCP/IP. This communication will be used for the control of analog and digital outputs of the device, which is able to be attached to any amplifier of audio signals. One of used protocols is UDP. This protocol is closely described, because it is used for transfer of data controlling outputs. The whole device is controlled by microprocessor ATmega32, which operates the communication with the ethernet interface through the controller ENC28j60, the communication with the D/A converters MCP4922 and controlling of digital outputs and a display. The device has its own IP and MAC address for identification in the network. It is possible to edit both addresses in the menu of the device with the help of the module LCD, the display of 2x16 characters with fours buttons. The audio amplifier staffed by the voltage controlled by the computing amplifiers SSM2018T is connected to this device. The amplifier is proposed as six-channel with symmetric inputs through the connectors XLR and unsymmetric outputs through the connectors CINCH. The operating programme which is able to be run on PC with the operating system Windows is necessary for the remote control of the device in the network and all functions of the device are controlled by this programme. This programme enables to control the device after setting the IP address of the destination device and the communication establishment. The motherboard is proposed as a universal module which keeps at disposal up to 6 analog outputs with the range of the control voltage 0 – 5 V and up to 21 binary inputs/outputs.
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Comparison of cashback portal and suggestions on its improvement in a specific organization
Smetanová, Lucie ; Střížová, Vlasta (advisor) ; Záruba, Tomáš (referee)
Thesis on the topic Comparison of cashback portal and suggestions on its improvement in a specific organization"deals with the comparison of the three cashback portals (PlnaPenezenka.cz, VratnéPeníze.cz and TopCashback.uk), and also proposals to improve the cashback Portal PlnaPenezenka.cz. The theoretical part is mainly focused on online marketing and its selected tools (SEO, e-mailing, PPC, affiliate marketing, etc.). In the next part of the theoretical part is introduced to web design and its trends 2015 and also elements for easy web site for the user. In the practical part is first introduced to small emerging company 5DM.cz and its three main projects-discount aggregator TopSleva.cz, affiliate network, Affiliate Club cashback Portal PlnaPenezenka.cz. On the comparison of three cashback portals PlnaPenezenka.cz, URVratnéPeníze.cz, and TopCashback.uk, with the addition of the word comparison drawn comparisons using multi-criteria decision making method of the weighted rating. Another part of the practical work is focused on proposals for improving the cashback Portal PlnaPenezenka.cz, with the aim of improving the services for users, attract new users, which is related to the increase of the profit of the company 5DM.cz and also differentiate from other Czech cashback portals and popular long foreign cashback portals, for example. TopCashback.uk or Quidco.com.
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Design of FTTH network
Šifta, Radim ; Reichert, Pavel (referee) ; Filka, Miloslav (advisor)
The aim of this thesis is to bring reader the issue of FTTH optical access network design. The thesis is divided into several basic parts. At the beginning of the thesis is outlined comparison with other optical access networks. In the next chapter are discussed the basic solutions, used architectures, topologies, and their comparison. The following chapter deals with the passive elements of the distribution network, their division and using. Next chapter is focused on installation technologies of distribution infrastructure, especially on microducting technology. Penultimate chapter is focused on the video services distributioning. The final part of the thesis consists of three designed models of the different architecture for the fictional village of "Světlokosy". There is an analysis of the individual variations in technological and economic terms. Simultaneously, investment costs of the proposed models are compared and their overall comparison and evaluation.
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Jak čelit nejistotě při rozhodování o odstranění fosforu ve vodohospodářství
Brabec, Jan ; Vojáček, Ondřej (advisor) ; Zajíček, Miroslav (referee)
Implementation of EU Water Framework Directive has led to an increased demand for cost-benefit analysis in water management. The directive introduces a good status, which is required on all water bodies by 2027. Excessive phosphorus inflows are one of the main reasons for not meeting the criteria in the Czech Republic. If achieving of the good status is not cost-proportionate, exemption can be applied. Many different methodologies were created across different states, including Czech official methodology by Slavíková et al. (2015). However, this methodology does not deal with uncertainty of measures effectiveness. This thesis describes how to implement the uncertainty into calculations using Bayesian networks. A case study of Stanovice water reservoir demonstrates the approach practically. Results of the Bayesian network show, that selected measures with available data eliminate desired amount of phosphorus in 70% of all cases. This reduction is most likely sufficient, because it holds for the upper estimate of required abatement (60 to 200 kg). Based on comparison of benefits and costs, it seems net benefits are generated by implementing suggested measures. Therefore, policy recommendation is to implement the selected measures.
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Location of node real position on the Internet
Kopeček, Tomáš ; Müller, Jakub (referee) ; Komosný, Dan (advisor)
In this thesis I focus on finding the position of computers on the Internet. This need for locating computers originated in the last several years through the creation of overlay networks. For this activity there are many algorithms. This paper describes the King method that estimated the distance between communicating stations by using the domain name system. The aim of this work is to verify the accuracy of the King method in experimental PlanetLab network. This network provides access for more than 1000 stations worldwide.
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e-Government and its Development in Slovakia
Misák, Tomáš ; Přibil, Jiří (advisor) ; Bína, Vladislav (referee)
Diploma thesis "e-Government and its development in Slovakia" deals with origin of the e-Government and its development in Slovakia. It also finds out pitfalls and conditions to be taken into account in the process of implementation of e-Government, such as the availability of Internet access for citizens. Or whether the country has enough funds to develop the internet network for proper operation. The thesis also explores the services and their using by citizens in Slovakia, as well as the views of citizens on eGovernment. Finally, it proposes how to encourage citizens to use e-Government in their everyday lives.
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Review of the book Natural capitalism
Moučka, Jan
Recenze je zaměřena na možné přínosy, které kniha přináší urbanismu, pojatému jako teorie prognóz, návrhu, výstavby a správy měst. Kniha uvádí témata, která již byla předmětem delšího zájmu, nových výzkumů a studií RMI (Rocky Mountains Institute v USA). Přes snahu autorů přinést co nejvíce případů aplikace nových přístupů, ekologických i ekonomických šancí - universálním návodem ani praktickým "manuálem" však kniha není. Mimo jiné i proto, že je ovlivněna současnou realitou USA, zejména problematikou závislosti společnosti na autech, a obsah knihy tak nesplňuje imperativ Alberta Einsteina, použitý jako motto knihy - " Problémy nelze řešit způsobem myšlení, který problémy vytvořil". Obsah kapitol 1 až 13 je zaměřen na moderní pojetí "ekologických služeb" přírody, tak aby dobře a udržitelně fungovala jako "faktor 4" kapitalismu. Kapitola 14 je zaměřena na "sociální služby", poskytované systémy jako jsou velká města, která jsou naplánována, realizována a spravována ve smyslu nově definovaných, udržitelných "sociálních služeb". Jako vzor je použito významné brazilské města Curitiba. Kapitola 14 je však mediální, nepřesvědčivá a postrádá jakékoli urbanistické informace. Detailnější pohled na případ města Curitiba si tudíž čtenář - odborník, politik, urbanista - musí získat sám a jinde. Je to nezbytné, jinak mu kniha poskytne o "faktoru 4" - sociálních službách - jen povrchní informace. Kapitola 15 je o prognózách a plánování ve vztahu ke společnému habitatu lidí a také ostatní přírody. Bohužel i v této kapitole chybí odpovídající konkrétní doklady.
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