Mobile IPv6 in OPNET Modeler

Diplomová práce shrnuje poznatky o podpoře mobility v IPv4 sítích a detailně prozkoumává možnosti mobility v IPv6 sítích. Jsou zde popsány funkce a topologie protokolů MIPv6 (RFC 3775), FMIPv6 (RFC 5568), HMIPv6 (RFC 5380) a F-HMIPv6. Dále práce obsahuje návrh simulace MIPv6 v prostředí OPNET Modeler a diskuzi výsledků k této simulaci. V neposlední řade, byla provedena analýza zdrojových kódů programu OPNET, pro účely návrhu vlastního protokolu pro podporu mobility, dle FMIPv6. V implementaci FMIPv6 se podařila vyřešit detekce událostí z linkové vrstvy, které slouží ke spouštění vlastního protokolu a byly implementovány dvě zprávy RtSolPr a PrRtAdv. Poznatky z této práce mohou sloužit k dokončení implementace protokolu FMIPv6 v prostředí OPNET, ale také mohou být využity obecně jako metodika práce při návrhu nových typů zpráv přenášených na síťové vrstvě v IPv6 síti.Master’s thesis includes knowledges about mobility support in IPv4 networks and studies abilities for mobility support in IPv6 networks. Describes protocols for mobility support, their functions and topologies like MIPv6 (RFC 3775), FMIPv6 (RFC 5568), HMIPv6 (RFC 5380) and F-HMIPv6. The thesis contains a design of the simulation MIPv6 in the OPNET Modeler program and the measured results are explained. There are analysis of source code for mobility support in MIPv6 too, which were used for design a new protocol according to FMIPv6 in the OPNET. The following parts of the proposal have been successfully resolved. The link-layer events detection, which triggers FMIPv6 protocol and implementation of two new types of messages, RtSolPr and PrRtAdv. Knowledges from this thesis could be used for next development of FMIPv6 in the OPNET. But could be used for generaly development new protocols working at network-layer too.

Knowledge Patterns within the Conception of Semantic Web

The article tries to contribute to answer a question if the general concept of knowledge pattern with its sub-concepts covers a great majority of the approaches used under this term in computer science literature. At one case, specialized software design patterns in the frame of object-oriented methodology become a very well used tool for software praxis; at a different case, there exists a large packet of tools for creating ontologies of various areas. As a third case, also RDF-based networks of linked data could be seen as knowledge patterns characterizing at least structures or defined activities of some social, working, or other organizations. We propose here to see the problem of knowledge pattern from knowledge representation especially at directions where the goal of using knowledge pattern meets the general goal of the semantic web. The motivation of this article is to apply knowledge patterns in the semantic web because knowledge at a higher professional level can and should usually be given in such a way that their specialized formal expertise incorporates the key to understanding their meaning

PUMPELLYIT – MINERÁL ZÁVĚREČNÉ METAMORFNÍ FÁZE V BYTOWNITOVÉ RULE VRBENSKÉ SKUPINY A V AMFIBOLITU JESENICKÉHO MASIVU (SILEZIKUM)

Investigated pumpellyite formed due to favourable source material, anchimetamorphic condition and retrogressive reactions, connected with fluid input. Its existence extends the mineral spectrum of topographic mineralogy in the Moravo- Silesian rock-units. Not frequent, but symptomatic alteration products of bytownite in gneisses of Vrbno Group, represent fine leaflets of pumpellyite-(Al) and -(Fe), associated with newly-formed quartz, in parts. Ca-amphibole from Jeseník Massif include fibres of pumpellyite-(Mg) and -(Al) and chlorite. Based on secondary mineral assemblage and chemistry of chlorite and pumpellyite, the metamorphic conditions are constrained at sub-greenschist facies, roughly conforming to the prehnite-pumpellyite subfacies. Late syn- to postkinematic microtextural position and other criteria may indicate that origin of pumpellyite was induced by cooling processes succeeding the Early Permian magmatism

PUMPELLYIT – MINERÁL ZÁVĚREČNÉ METAMORFNÍ FÁZE V BYTOWNITOVÉ RULE VRBENSKÉ SKUPINY A V AMFIBOLITU JESENICKÉHO MASIVU (SILEZIKUM)

Investigated pumpellyite formed due to favourable source material, anchimetamorphic condition and retrogressive reactions, connected with fluid input. Its existence extends the mineral spectrum of topographic mineralogy in the Moravo- Silesian rock-units. Not frequent, but symptomatic alteration products of bytownite in gneisses of Vrbno Group, represent fine leaflets of pumpellyite-(Al) and -(Fe), associated with newly-formed quartz, in parts. Ca-amphibole from Jeseník Massif include fibres of pumpellyite-(Mg) and -(Al) and chlorite. Based on secondary mineral assemblage and chemistry of chlorite and pumpellyite, the metamorphic conditions are constrained at sub-greenschist facies, roughly conforming to the prehnite-pumpellyite subfacies. Late syn- to postkinematic microtextural position and other criteria may indicate that origin of pumpellyite was induced by cooling processes succeeding the Early Permian magmatism

Hadron Production in Diffractive Deep-Inelastic Scattering

Characteristics of hadron production in diffractive deep-inelastic positron-proton scattering are studied using data collected in 1994 by the H1 experiment at HERA. The following distributions are measured in the centre-of-mass frame of the photon dissociation system: the hadronic energy flow, the Feynman-x (x_F) variable for charged particles, the squared transverse momentum of charged particles (p_T^{*2}), and the mean p_T^{*2} as a function of x_F. These distributions are compared with results in the gamma^* p centre-of-mass frame from inclusive deep-inelastic scattering in the fixed-target experiment EMC, and also with the predictions of several Monte Carlo calculations. The data are consistent with a picture in which the partonic structure of the diffractive exchange is dominated at low Q^2 by hard gluons.Comment: 16 pages, 6 figures, submitted to Phys. Lett.

Low Q^2 Jet Production at HERA and Virtual Photon Structure

The transition between photoproduction and deep-inelastic scattering is investigated in jet production at the HERA ep collider, using data collected by the H1 experiment. Measurements of the differential inclusive jet cross-sections dsigep/dEt* and dsigmep/deta*, where Et* and eta* are the transverse energy and the pseudorapidity of the jets in the virtual photon-proton centre of mass frame, are presented for 0 < Q2 < 49 GeV2 and 0.3 < y < 0.6. The interpretation of the results in terms of the structure of the virtual photon is discussed. The data are best described by QCD calculations which include a partonic structure of the virtual photon that evolves with Q2.Comment: 20 pages, 5 Figure

A Search for Selectrons and Squarks at HERA

Data from electron-proton collisions at a center-of-mass energy of 300 GeV are used for a search for selectrons and squarks within the framework of the minimal supersymmetric model. The decays of selectrons and squarks into the lightest supersymmetric particle lead to final states with an electron and hadrons accompanied by large missing energy and transverse momentum. No signal is found and new bounds on the existence of these particles are derived. At 95% confidence level the excluded region extends to 65 GeV for selectron and squark masses, and to 40 GeV for the mass of the lightest supersymmetric particle.Comment: 13 pages, latex, 6 Figure

A Purity Monitoring System for the H1 Liquid Argon Calorimeter

The ionization probes used for monitoring the liquid argon purity in the H1 calorimeter are described and results of their operation in tests at CERN and during the period 1992 to the end of 1998 at HERA are given. The high sensitivity of the charge measurements leads to refined charge collection models, and to the observation of a variation of the ionization yield of our electron sources with temperature.Comment: 26 pages, 14 figure

Measurement of the charm and beauty structure functions using the H1 vertex detector at HERA

Inclusive charm and beauty cross sections are measured in e − p and e + p neutral current collisions at HERA in the kinematic region of photon virtuality 5≤Q 2≤2000 GeV2 and Bjorken scaling variable 0.0002≤x≤0.05. The data were collected with the H1 detector in the years 2006 and 2007 corresponding to an integrated luminosity of 189 pb−1. The numbers of charm and beauty events are determined using variables reconstructed by the H1 vertex detector including the impact parameter of tracks to the primary vertex and the position of the secondary vertex. The measurements are combined with previous data and compared to QCD predictions

A Measurement of the Proton Structure Function F ⁣2(x,Q2)F_{\!2}(x,Q^2)

A measurement of the proton structure function $F_{\!2}(x,Q^2)$ is reported for momentum transfer squared $Q^2$ between 4.5 $GeV^2$ and 1600 $GeV^2$ and for Bjorken $x$ between $1.8\cdot10^{-4}$ and 0.13 using data collected by the HERA experiment H1 in 1993. It is observed that $F_{\!2}$ increases significantly with decreasing $x$, confirming our previous measurement made with one tenth of the data available in this analysis. The $Q^2$ dependence is approximately logarithmic over the full kinematic range covered. The subsample of deep inelastic events with a large pseudo-rapidity gap in the hadronic energy flow close to the proton remnant is used to measure the "diffractive" contribution to $F_{\!2}$.Comment: 32 pages, ps, appended as compressed, uuencoded fil