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Communities of Practice are frequently seen as key enablers of efficient corporate operations in knowledge-intensive industries. They can improve internal communications and knowledge sharing both within an organization and between the organization and its external partners. Despite the positive effects a Community of Practice may have at any one point in time, however, its successful management over the long term requires adaptations to take into account the different stages in the life cycle of the Community. The objective of this article is to reveal the secrets of successful long-term management of Communities of Practice; we do this using a case study of Schneider Electric, a global leader in energy-efficiency management. The article will examine the Human Machine Interface Community, which has 400 active members in more than 60 countries. © 2011 Wiley Periodicals, Inc. [ABSTRACT FROM AUTHOR]

The topic of this paper is the study of electrically tunable phase-shifters based on the use of liquid crystals. The dielectric characterization of the commercial liquid crystal involved in this study allows us to determine its dielectric permittivities (with and without DC voltage applied) and then its dielectric anisotropy. In this way, two phase-shifter configurations were studied. Every devices propose inverted microstrip line. The two circuits have been realized with coplanar accesses to be use in the millimeter-frequency range. With the aim to improve the phase shift parameter (in °/GHz/cm), our work aims to reduce the transmission line. Instead of a rectilinear transmission line, this one is based on a symmetric stub line. The phase shift obtained is enhanced from 0.87°/GHz/cm to 2.77°/GHz/cm. © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 43: 338–341, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20463 [ABSTRACT FROM AUTHOR]

In order to develop a new kind of filter that makes a compromise between quasi-optical and more traditional bandpass filtering techniques at millimetre wavelengths, a theoretical modelling of grids in oversize and monomodal waveguides is performed using a variational method. [ABSTRACT FROM AUTHOR]