Vol. 62, n° 9-10, September-October 2007
Content available on Springerlink

Co-channel interference effects as applied to broadband fixed wireless access channel capacity statistical distribution

Athanasios D. PANAGOPOULOS*,**, George E. CHATZARAKIS**

* Wireless & Satellite Communications Group, School of Electrical and Computer Engineering, National Technical University of Athens – 9 Iroon Polytechniou Street, 15780 Zografou-Athens, Greece
** Department of Electrical and Electronics Engineering, School of Pedagogical and Technological, Education (aspete) – Athens, N. Heraklion Attikis, Greece 14121

Abstract Channel Capacity is of primary importance in broadband fixed wireless access (BFWA) networks due to the ever increasing demand for multimedia services and the possibility of providing wireless Internet.» Read the summary

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Vol. 62, n° 7-8, July-August 2007
Content available on Springerlink

Guest editors
Valérie Fernandez, Télécom Paris, France
Suzanne Rivard, HEC Montréal, Canada

Foreword

Valérie Fernandez, Suzanne Rivard

Managing networks of communities of practice for organizational knowledge creation, a Knowledge Management imperative in the era of globalization

Takaya KAWAMURA

Graduate School of Business, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-Ku, Osaka, 558-8585, Japan.

Abstract This article explores some imperatives of Knowledge Management for organizational knowledge creation in the era of globalization. As the transformation of Knowledge Management practices of Japanese firms in 1990s shows, Nonaka and Takeuchi’s original model of organizational knowledge creation needs to be expanded by incorporating the concept of “community of practice” as the “engine” of knowledge creation.» Read the summary

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Vol. 62, n° 5-6, May-June 2007
Content available on Springerlink

Guest editors
Jean-Louis de Bougrenet de la Tocnaye, GET/ENST Bretagne, France
Ioannis Tomkos, Athens Information Technology Center, Greece
Michel Joindot, France Télécom R&D, France

Foreword

Jean-Louis de Bougrenet de la Tocnaye, Ioannis Tomkos, Michel Joindot

WDM transmissions exploiting optical phase conjugation

Xuefeng TANG, Zongyan WU

GET/ENST Bretagne, UMR CNRS6082-Foton, Optics Department, CS 83818, 29238 Brest, France

Abstract Due to the frequency shift occurring in the process of optical phase conjugation (OPC) generation, the application of OPC in multiple-channel transmission is limited severely by the third-order dispersion. In this paper, taking into account the influence of the frequency shift and the compensation of nonlinear effects, we present an effective method to optimize the dispersion map for broad-band transmissions using optical phase conjugation.» Read the summary

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Vol. 62, n° 3-4, March-April 2007
Content available on Springerlink

Guest editors
Houssem Assadi, France Telecom R&D, France
Philippe Owezarski, LAAS/CNRS, France
Ben Anderson, University of Essex, UK

Foreword

Houssem Assadi, Philippe Owezarski, Ben Anderson

Internet 1.0: early users, early uses

Thomas BEAUVISAGE, Valérie BEAUDOUIN, Houssem ASSADI

France Télécom R&D – 38-40, rue du Général Leclerc, 92794 Issy-les-Moulineaux, France

Abstract We are presenting here a set of tools that enabled us to build a detailed picture of Internet uses, connecting it to users with precisely defined socio-demographic profiles. On the one hand, our work is based on representative panels of the Internet-connected population monitored over time; this allows us to get a sociologically sound vision of Internet uses.» Read the summary

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Vol. 62, n° 1-2, January-February 2007
Content available on Springerlink

Guest editors
Bernadette Dorizzi, GET/INT, Evry, France
Carmen Carcia-Mateo, ETSI Telecommunicacion, Vigo, Spain

Human recognition using biometrics: an overview

Arun ROSS*, Anil K. JAIN**

* Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506, USA
** Department of Computer Science and Engineering, Michigan State University, East Lansing, MI 48824, USA

Abstract Establishing identity is becoming critical in our vastly interconnected society. Questions such as “Is she really who she claims to be?”, “Is this person authorized to use this facility?”, or “Is he in the watchlist posted by the government?”» Read the summary

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