104 research outputs found
Simulation Design in Communication System Training
CieÄľom práce bolo analyzovaĹĄ probelmatiku modernĂ˝ch komunikaÄŤnĂ˝ch systĂ©mov so zameranĂm na konvergovanĂ© siete a ich prvky a navrhnúť laboratĂłrnu Ăşlohu. Teoretická ÄŤasĹĄ práce je rozsiahla. Zaoberá so sieĹĄovou architektĂşrou OSI, ktorá tvorĂ základ modernĂ˝ch komunikaÄŤnĂ˝ch sietĂ. Popisuje aj aktĂvne sieĹĄovĂ© prvky ich charakteristiky, vĂ˝hody a nevĂ˝hody. Teoretická ÄŤasĹĄ venuje kapitolu aj k neurĂłnovĂ˝m sieĹĄam, ktorá popĂše základnĂ˝ umelĂ˝ neurĂłn a siete, ktorĂ© mĂ´Ĺľu byĹĄ vyuĹľitĂ© pre riadenie sieĹĄovĂ©ho prvku.Tieto siete sĂş Hopfieldová sieĹĄ a Kohonenová sieĹĄ. Praktická ÄŤasĹĄ sa zaoberá s navrhnutĂm laboratĂłrnej Ăşlohy do vyuÄŤovania, ktorá je zameraná na Hopfieldovu sieĹĄ a fungovanie klasifikátoru prepĂnaÄŤa. Ăšloha je vytvorená v Matlabe.The aim of this work was to analyze the problematics of modern communication systems focusing on the converged network and their elements and to propose a laboratory work. The theoretical part of the work is extensive. It deals with the network architecture OSI, which forms the basic of modern communication networks. It describes also the active network elements and their characteristics, advantages and disadvantages. The theoretical part deals in a chapter with the neuron networks, which describes the basic artificial neuron of a network, which can be used for the controlling of network elements. These networks are Hopfield network and Kohonen network. The practical part deals with the proposing of the laboratory work into the education, which is focused on the Hopfield network and the functioning of classifier switches. The work is made in Matlab.
Single sign-on systems
Bakalárna práca sa zaoberá s jednotnĂ˝m prihlásenĂm . Opisuje vyskitujĂşce sa systĂ©my pouĹľĂvanĂ© v rozsiahlych poÄŤĂtaÄŤovĂ˝ch sietiach, zabezpeÄŤovacie moĹľnosti, integráciu do operaÄŤnĂ©ho systĂ©mu Microsoft Windows. Druhá ÄŤasĹĄ sa zaoberá s webovĂ˝m rozhranĂm pre jednotnĂ© prihlásenie, kde sĂş uvedenĂ© základnĂ© pojmy a princĂpi fungovania. Zameriava sa na technolĂłgiu OAuth, ktorá je vyuĹľitá pri vytvorenĂ praktickej ÄŤasti bakalárskej práce.The subject of this bachelor thesis is the so-called single sign-on technology in context of access control methods. It describes the solutions used in wide computer systems, options of implementing security and integration into the Microsoft Windows operating system. The next part specifies the web interface of this technology, where the explanation of the basic terms and principals are also included. It is focused on the Oauth, which will be used in the practical part of work.
Elektromágneses módszerfejlesztések a mérési adatokban lévő földtani információ hatékonyabb és stabilabb feltárása céljából = Development of Electromagnetic (EM) Methods tending to more efficient and more stable revelation of the geological information from field data
3D EM globális inverziĂłs szoftvereket fejlesztettĂĽnk ki. A szoftverekkel felszĂnközeli olajszennyezĂ©sek inverziĂłs rekonstrukciĂłját vĂ©geztĂĽk el. Az EM mĂłdszerek esetĂ©re GIS alapĂş fejlesztĂ©st vĂ©geztĂĽnk, s GeoMedia Open GIS alatt működĹ‘ rendszert hoztunk lĂ©tre, amely lehetĹ‘vĂ© teszi az EM Ă©s IP paramĂ©terek komplex kĂ©pi Ă©s numerikus elemzĂ©sĂ©t. Sikeresen pályáztunk az Intergraph RRL programjába. GeoMedia WebMap alatt kifejlesztettĂĽk a GIS alapĂş rendszer hálĂłzati kliens verziĂłját. Vizsgáltuk a felszĂn közeli vetĹ‘s szerkezetek Ă©s a csĹ‘vezetĂ©kek hatását a Hz Ă©s az Ex/Hy tĂ©rkomponensek amplitĂşdĂł- Ă©s fázisviszonyaira. A bĂ©lĂ©scsöves gerjesztĂ©sű geoelektromos szondázások adatainak inverziĂłjára elkĂ©szĂĽlt a "Cube3Dinv" elnevezĂ©sű program, melyben a direkt feladat megoldása integrálegyenletes mĂłdszerrel törtĂ©nik. Az IP mĂłdszer esetĂ©n elvĂ©geztĂĽk az időállandĂł spektrum inverziĂłs számĂtásának továbbfejlesztĂ©sĂ©t. Megoldottuk az időállandĂł spektrum, Fourier-spektrumok segĂtsĂ©gĂ©vel törtĂ©nĹ‘ meghatározását. A korábbi terepi mĂ©rĂ©sek adatainak Ăşjrafeldolgozása mellett 4 szennyezett terĂĽleten Ăşj terepi mĂ©rĂ©seket is vĂ©geztĂĽnk. Az eredmĂ©nyek igazolták, hogy a szennyezettsĂ©g mĂ©rtĂ©kĂ©nek a becslĂ©sĂ©re alkalmas az időállandĂłval sĂşlyozott amplitĂşdĂł Ă©rtĂ©k. Az időállandĂł spektrumok alapján a szennyezĂ©s szempontjábĂłl veszĂ©lyesebb redox Ă©s fĂ©mes hatások által Ă©rintett tĂ©rrĂ©szek lehatárolhatĂłk. A szennyezĂ©s lehatárolására bevezettĂĽk a korrigált elektromos vezetĹ‘kĂ©pessĂ©get. | Some 3D EM global inversion software had been developed. We perform the inverse reconstruction of near surface oil contaminations using developed software. GIS based system under GeoMedia Open GIS had been developed for EM Methods, which makes complex image and numerical analysis of EM and IP parameters possible. Our application for the Intergraph RRL program membership was successful. We developed the network client version of GIS based system. The effects of the pipes and near surface structures with faults for the amplitude- and phase relation of Hz and Ex/Hy parameters were examined. A software named "Cube3Dinv" for the inversion of geoelectric sounding data using tube for transmission, in which integral equation method are used for the solution of forward problem had been finished. We elaborated the calculation way of the IP time constant spectra using inverse methods. Determination possibility of time constant spectrum from Fourier spectra had been solved. We performed four new field measurements over contaminated areas beside the data reprocessing of former field measurements. Results verified that the amplitude value waited with time constant suitable for the estimation of the contamination level. Seeing the dangerous contamination types, the areas touched by redox and metallic effects are able to determine on the basis of time constant spectra. Corrected electric conductivity has been introduced for the mapping of contamination
Plazmafizikai kutatások ECR ionforrással = Plasma physics research by ECR ion source
Az ATOMKI eredetileg nagytöltĂ©sű nehĂ©zionok előállĂtására kĂ©szĂĽlt elektron-ciklotronrezonanciás (ECR) ionforrásában fullerĂ©n (C60) plazmákat állĂtottunk elĹ‘. Magát az ionforrást is jelentĹ‘sen átalakĂtottuk, Ăgy a világon eddig publikált legmagasabb intenzitásĂş fullerĂ©nion nyalábokat kaptuk: (C60+)-bĂłl 500 nA, (C60++)-bĂłl 1500 nA. C60+Fe Ă©s C60+N keverĂ©kplazmákat tanulmányoztunk, a kivont ionnyalábban a normál fullerĂ©nnĂ©l nagyobb tömegű rĂ©szecskĂ©ket detektáltunk. Nyalábspektrum-analĂzisek, ESR Ă©s TEM vizsgálatok kimutatták, hogy e rĂ©szecskĂ©k között olyan molekulák is vannak, melyben N, ill. Fe kapcsolĂłdik kĂĽlönbözĹ‘kĂ©ppen C58, C59 Ă©s C60 szĂ©ngömbökhöz. Az ECR-plazma tehát alkalmas fullerĂ©nek Ă©s más anyagok szintĂ©zisĂ©re. Ar, Xe Ă©s Fe plazmákrĂłl röntgenfelvĂ©tel sorozatokat kĂ©szĂtettĂĽnk, a plazma ionjainak tĂ©r- Ă©s energiaeloszlását vizsgáltuk. Hagyományos Ă©s emissziĂłs Langmuir-szondákkal a plazma helytĹ‘l fĂĽggĹ‘ paramĂ©tereit (sűrűsĂ©g, potenciál) vizsgáltuk. KifejlesztettĂĽnk egy programcsomagot (TrapCAD), mellyel igen nagyszámĂş (pl. 10^5) elektron mozgása Ă©s energiaváltozása tanulmányozhatĂł Ă©s követhetĹ‘ grafikusan is az ECR Ă©s hasonlĂł ionforrásokban. Az ECR ionforrást jelentĹ‘sen átalakĂtottuk, mostantĂłl kĂ©t kĂĽlönbözĹ‘ ĂĽzemmĂłdban használhatĂł. AlapkiĂ©pĂtĂ©sben a berendezĂ©s továbbra is kismĂ©retű, magas ionizáltsági fokĂş nehĂ©zionplazmákat állĂt elĹ‘, melybĹ‘l nagytöltĂ©sű ionnyalábok vonhatĂłk ki. Az Ăşj elrendezĂ©sben nagymĂ©retű, de kevĂ©sbĂ© lefosztott plazmákat kapunk. Ekkor a berendezĂ©s elsĹ‘sorban anyagkutatásra, plazma-felĂĽlet kölcsönhatások tanulmányozására alkalmas. A világon ez az elsĹ‘ ilyen kĂ©tfunkciĂłs ECR-berendezĂ©s. | C60 plasmas were produced in the ATOMKI electron cyclotron resonance (ECR) ion source which was originally constructed for the production of highly charged heavy ions. After significant modifications the ever published highest intensities of fullerene ion beams were recorded: 500 nA of (C60)+ and 1500 nA of (C60)++. C60+Fe and C60+N mixture plasmas were studied, in the extracted beam spectra heavier particles than the normal fullerenes, were detected. Beam spectra analysis, ESR and TEM investigations showed that among these particles there were molecules in which N, or Fe were connected by different ways to C58, C59 and C60 carbon balls. This proved that the ECR plasma is suitable to synthesize fullerenes with other materials. X-ray photos were made of Ar, Xe and Fe plasmas and the spatial and energy distribution of the plasma ions were studied. Some local plasma parameters (density, potential) were investigated by traditional and emission-type Langmuir-probes. We developed a code (TrapCAD) to simulate and follow graphically the movement and energy evolution of large number (e.g. 10^5) of electrons in ECR and similar ion sources. The ECR ion source was significantly transformed and from now it can be used in two different working modes. In basic configuration the facility delivers the usual small size, highly charged heavy ion plasmas from which highly charged ion beams can be extracted. In the new arrangement large size, but less ionized plasmas are obtained. This mode is convenient for material research and for plasma-surface investigations. This is the first ECR facility in the world with such two functions
Experimental study of coherence and correlation in the anisotropy of Ne KL-LLL satellite Auger decay
A CPT-szimmetria kĂsĂ©rleti ellenĹ‘rzĂ©se lassĂş antiprotonokkal = Experimental test of the CPT symmetry using slow antiprotons
KutatĂłmunkánk alapvetĹ‘ motiváciĂłja a CPT-invariancia, anyag Ă©s antianyag szimmetriájának kĂsĂ©rleti ellenĹ‘rzĂ©se az ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) TokiĂł-Aarhus-BĂ©cs-Brescia-Budapest-Debrecen egyĂĽttműködĂ©s keretĂ©ben, a CERN antiproton-lassĂtĂł berendezĂ©sĂ©nĂ©l, az antiproton tulajdonságainak mind pontosabb mĂ©rĂ©sĂ©vel a protonĂ©val összehasonlĂtva. Az antiproton tömegĂ©t Ă©s töltĂ©sĂ©t antiprotonos hĂ©liumatomok energiátmeneteinek lĂ©zerspektroszkĂłpiás mĂ©rĂ©sĂ©vel határozzuk meg, a mágneses momentumát pedig felhasadt hiperfinom állapotok gerjesztĂ©sĂ©vel lĂ©zer-mikrohullám-lĂ©zer hármas rezonancia segĂtsĂ©gĂ©vel. A tömeg Ă©s töltĂ©s meghatározását Ă©vrĹ‘l Ă©vre tovább pontosĂtottuk a lĂ©zertechnika javĂtásával Ă©s lassĂş antiprotonnyaláb kialakĂtásával, amely lehetĹ‘vĂ© tette az antiprotonok megállĂtását igen kis nyomásĂş (<1 mbar) gázban Ă©s meghonosĂtottuk a kĂ©tfotonos, csaknem teljesen Doppler-mentes lĂ©zerspektroszkĂłpia mĂłdszerĂ©t. Sikeres elsĹ‘ kĂsĂ©rletsorozatot vĂ©geztĂĽnk a mágneses momentum mĂ©rĂ©sĂ©re. JelentĹ‘s Ăşjabb eredmĂ©nyeket Ă©rtĂĽnk el a MUSASHI lassĂş antiproton-forrás fejlesztĂ©sĂ©ben is, az komoly felhasználĂłi berendezĂ©ssĂ© nĹ‘tte ki magát. BefejeztĂĽk az antihidrogĂ©n mágneses momentumának mĂ©rĂ©sĂ©re szolgálĂł berendezĂ©s terveit Ă©s megkezdtĂĽk annak Ă©pĂtĂ©sĂ©t. Az antiprotonos kĂsĂ©rletek Ă©rtelmezĂ©sĂ©hez szĂĽksĂ©ges a lassĂş töltött rĂ©szecskĂ©k ĂĽtközĂ©si folyamatainak tisztázása, abban is jelentĹ‘s - fĹ‘leg elmĂ©leti - eredmĂ©nyeket Ă©rtĂĽnk el. | The basic motivation of our research work is the experimental test of CPT invariance, the symmetry principle of matter and antimatter within the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) Tokyo-Aarhus-Brescia-Budapest-Debrecen-Vienna collaboration at the Antiproton Decelerator facility at CERN. We measure the properties of the antiproton in comparison with those of the proton. The mass and charge of the antiproton is determined by measuring the transition energies of antiprotonic helium using laser spectroscopy and its magnetic moment via exciting transitions with hyperfine splitting using a laser-microwave-laser triple resonance technique. We have increased the precision of determining the antiproton mass and charge by improving the lasers and by forming a slow antiproton beam which facilitates stopping it in gases of very low (<1 mbar) pressures and performed a first measurement using quasi Doppler-free two-photon spectroscopy. We completed the first successful series of measurements of the magnetic moment of the antiproton. The development of the MUSASHI slow antiproton source is almost complete, it became a real user facility. We have completed the design of the apparatus for measuring the magnetic moment of antihydrogen atoms and started its construction. For the interpretation of the antiprotonic experiments the collision processes of slow charged particles have to clarified: we made good - mostly theoretical - progress there as well
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