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SIP implementations in Asterisk open source PBX
Bednář, Vít ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
The thesis compares native SIP stack with PJSIP stack in the open source telephone private branch exchange (PBX) Asterisk. First, there are described both SIP protocol and Asterisk application. Subsequently, the architecture, new function support and the stacks setting possibilities are explored. For different exchange scenarios several commented configuration files are presented. The stacks are tested using Spirent TestCenter C1 software thereafter. In conclusion, selected properties are assessed and new PJSIP stack benefits are summarized. In addition, the laboratory assignment is attached.
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Measurement of communication latency in IP networks
Bednář, Vít ; Vrba, Kamil (referee) ; Komosný, Dan (advisor)
Semestral thesis is focused on measurement of communication delay in networks. There is described creation of individual kinds of delay during the transfer in networks. Tools for measurement of delay are described and web pages are designed and made too. There is measured delay on choose 27 IP address with help of this page.
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SIP implementations in Asterisk open source PBX
Bednář, Vít ; Krajsa, Ondřej (referee) ; Šilhavý, Pavel (advisor)
The thesis compares native SIP stack with PJSIP stack in the open source telephone private branch exchange (PBX) Asterisk. First, there are described both SIP protocol and Asterisk application. Subsequently, the architecture, new function support and the stacks setting possibilities are explored. For different exchange scenarios several commented configuration files are presented. The stacks are tested using Spirent TestCenter C1 software thereafter. In conclusion, selected properties are assessed and new PJSIP stack benefits are summarized. In addition, the laboratory assignment is attached.
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Measurement of communication latency in IP networks
Bednář, Vít ; Vrba, Kamil (referee) ; Komosný, Dan (advisor)
Semestral thesis is focused on measurement of communication delay in networks. There is described creation of individual kinds of delay during the transfer in networks. Tools for measurement of delay are described and web pages are designed and made too. There is measured delay on choose 27 IP address with help of this page.
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Ways of using e-learning in teaching of physics at basic school
BEDNÁŘ, Vít
Thesis theoretical part based on research describes the different types of e-learning with its development and particularly with pedagogical context in elementary school, and also with its psychosocial aspects. Presents the possibility of using the multimedia in Physics teaching. Furthermore, the practical part describes a concrete deployment of LMS Moodle for Physics teaching - branch Fluids for the blended learning teaching style and compares it with the traditional way of teaching.
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On-line experiments by physics education at basic school
BEDNÁŘ, Vít
On-line experiments by physics education at basic school The aim of this diploma thesis is to prove the usefulness of on-line experiments during physics teaching. The work is divided into two parts: theoretical one and practical one. The theoretical part deals with the teaching in primary schools, the possibility of the usage of informational and communication technologies, the increase of student´s motivation through new teaching methods and the student´s life in a school surrounding. The practical part consists of the experiment complex created by the set PASCO. The working sheets, which are given to some of the experiments, enable to attest the effectiveness of the chosen experiments in practice. The results of the didactic samplers to the particular classes are enclosed and described.
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Waves and Oscillations in Solar Coronal Loops
BEDNÁŘ, Vít
Basic Sun characteristic, solar corona mainly. Introducing spacecrafts SoHO and TRACE as fundamental instruments of observing solar corona activities and close description this activities in therms of MHD theory. Recherche reflects the current trends in the observational study of coronal waves and oscillations (standing kink, sausage and longitudinal modes, propagating slow waves and fast wave trains, the search for torsion waves), theoretical modeling of interaction of MHD waves with plasma structures, and implementation of the theoretical results for the mode identification. Also the use of MHD waves for remote diagnostics of coronal plasma - MHD coronal seismology - is discussed and the applicability of this method for the estimation of coronal magnetic field, transport coefficients, fine structuring and heating function is demonstrated.
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