Wyniki wyszukiwania - BazTech

1

Opracowania ZST dotyczące systemów SDH, ich synchronizacji i zarządzania

Dąbrowski A., Brożyna J., Drobnik A., Kula S.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2010

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nr 4

117-117

PL

Omówiono najważniejsze prace dotyczące systemów teletransmisyjnych SDH oraz ich synchronizacji prowadzone w Zakładzie Systemów Teletransmisyjnych w latach 1993-2000.

EN

This article describes shortly most important works done at Transmission System Division on SDH systems and their synchronization within the period 1993-2000.

2

RPR - nowy standard transmisji pakietowej

Drobnik A.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

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2003

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nr 7

358-364

PL

Przedstawiono zasadnicze elementy nowo opracowywanego standardu transmisji pakietowej w sieciach telekomunikacyjnych IEEE 802.17, który definiuje Resilient Packet Ring (RPR) jako protokół MAC warstwy 2. niezależny od warstwy fizycznej. Opisano zasadnicze elementy tego standardu. Omówiono podstawowe cechy sieci RPR. Porównano platformę transmisyjną RPR z SDH i Ethernetem oraz wskazano, że RPR jest bardzo atrakcyjnym rozwiązaniem dla zastosowań w sieciach MAN i WAN.

EN

New packet transmission standard RPR is actually under development. The IEEE 802.17 standard will define a Resilient Packet Ring (RPR) Media Accsess Control (MAC) that is physical layer independent. The article is devoted to the presentation of this standard. It describes characteristics of RPR networks in the following areas: ring RPR and its node structures, basics of the transmission organization, protection mechanisms, topology discovery, frame formats and a fairness algorithm. Comparison of RPR to the SDH and Ethernet platforms is presented. It points out that RPR is a very attractive solution for MAN and WAN networks.

3

Electron microscopic analysis of the structure of the silver halide light-sensitive layers.

Drobnik A., Nowak P.

Optica Applicata

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2002

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Vol. 32, nr 1-2

93-101

EN

In the paper, the results of morphology examination of silver halide light sensitive systems performed for 28 multilayer light sensitive materials, classified into three groups according to their properties, are presented. Identification of component layers, estimation of their thickness as well as the conclusions concerning both magnitude and external shapes of the sliver halide crystals contained in these layers were carried out based on computer analysis of the images of the transversal cross-section of the light-sensitive layer obtained in the electron microscope. The total thickness of the light-sensitive emulsion layer was determined using the method of intermediate (direct) measurement and the obtained results were presented in the graphic form as their relation to the nominal light sensitivity. As a result of the work carried out such characteristics of the morphology of contemporary silver halide materials were obtained which are not available in the form of experimental examination published in commercial catalogues, patents or the professional literature.