Wyniki wyszukiwania - BazTech

1

A Survey on Chordal Rings, N2R and Other Related Topologies

Pedersen J. M., Zabłudowski A., Gutierrez J., Ledziński D., Dubalski B.

Image Processing & Communications

|

2012

|

Vol. 17, no. 3

63--70

EN

In this short paper we summarize the main results of 10 years of research on network topologies carried out jointly at Aalborg University (AAU), Aalborg, Denmark, and University of Life Science (UTP), Bydgoszcz, Poland. The starting points are the Chordal Rings, which were mainly studied in UTP, and the N2R which were studied at AAU. From here the universities have collaborated intensely, and studied a number of alternatives and variations of the original topologies, based on methodologies developed both independently and jointly over time. This paper gives an overview of the work done, and provides appropriate references to the work for further details. The paper is presented as a tribute to Professor and Dean Antoni Zabłudowski who passed away during 2012.

2

Making FTTH happen: the Danish experience

Pedersen J. M., Jensen M., Nielsen R., Riaz T., Gutierrez J., Madsen O.

Image Processing & Communications

|

2009

|

Vol. 14, no 1

7-12

EN

The deployment of Fiber To The Home (FTTH) in Denmark has accelerated over the previous years, and made Denmark one of the countries in Europe with the highest FTTH deployment rate. This development has been largely driven by the consumer-owned utilities and with almost no interference from government institutions and the incumbent operator, which makes the Danish FTTH evolution quite unique. In this paper we analyze the Danish FTTH deployment, and highlight some of the main drivers and challenges. A main conclusion is that FTTH can actually be deployed, even in rural areas. On the other hand the fast development in Denmark would probably not have happened without the special organization of electricity companies, and the traditions of these. In addition to technical challenges, ranging from system integration problems to handling of the physical fibers, it has been a significant challenge to actually attract customers: The development of speed and availability of xDSL solutions has increased the need for "killer" applications which take full advantage of the speeds offered by FTTH. The main contribution of this short paper is the analysis of the Danish FTTH experiences, which is valuable when developing technologies and services for FTTH, or when taking initiatives for supporting FTTH deployment in other countries.

3

Degree 3 networks topological routing

Gutierrez J., Riaz T., Pedersen J., Labeaga S., Madsen O.

Image Processing & Communications

|

2009

|

Vol. 14, no 4

35-48

EN

Topological routing is a table free alternative to traditional routing methods. It is specially well suited for organized network interconnection schemes. Topological routing algorithms correspond to the type O(1), constant complexity, being very attractive for large scale networks. It has been proposed for many topologies and this work compares the algorithms for three degree three topologies using a more analytical approach than previous studies.

4

Comparing the reliability of regular topologies on a backbone network. A case study.

Labeaga S., Gutierrez J., Riaz T., Pedersen J.

Image Processing & Communications

|

2009

|

Vol. 14, no 4

49-62

EN

The aim of this paper is to compare the reliability of regular topologies on a backbone network. The study is focused on a large-scale fiber-optic network. Different regular topological solutions as single ring, double ring or 4-Regular grid are applied to the case study, and compared in terms of degree, diameter, average distance, economical cost and availability. Furthermore, other non-quantitative parameters such as expandability, embeddability and algorithmic support are introduced.

5

Ultrasound Velocities in Fe64Ni10Nb3Cu1Si13B9 Alloy

Kaczkowski Z., Barandiaran J., Gutierrez J., Vlasak G., Svec P., Duhaj P., Milewska E., Krzyżewski A., Danis E.

Molecular and Quantum Acoustics

|

2002

|

Vol. 23

201-212

EN

The ultrasound velocities at constant magnetic filed (cH) and at constant induction (cB), in the 50 mm long strips cut from the Fe64Ni10Nb3Cu1Si13B9 alloy ribbon were measured is as-quenched state and after annealing hot 1h in vacuu, from 100??? C to 550??? C. These velocities were changing from 3200 to 5320 m/s depending on the heat-treatment and magnetic bias field.