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How fast are the two-dimensional gaussian waves?

For a stationary two-dimensional random field evolving in time, we derive the intensity distributions of appropriately defined velocities of crossing contours. The results are based on a generalization of the Rice formula. The theory can be applied to practical problems where evolving random fields are considered to be adequate models. We study dynamical aspects of deep sea waves by applying the d

The Role of Diasporas in peace, Democracy and Development in the Horn of Africa

Introduction: Transnationalism and migration Ulf Johansson Dahre The 5th annual Somalia International Rehabilitation Centre (SIRC) Conference of the Horn of Africa focused on “The Role of Diasporas in Peace, Democracy and Development”. The conference was held in Lund, Sweden, August 19-20, 2006. The content of this volume reflects some of the views and proceedings presented at the conference. I

Fast and accurate ACLR estimation method

The paper presents theory and simple expressions to estimate adjacent-channel leakage power ratio (ACLR or ACPR) with WCDMA signals that greatly simplify the design of analog circuits. High accuracy is obtained when the AM/AM and AM/PM conversion can be modeled by a polynomial of reasonable order. Results based on a power amplifier and a low-noise amplifier give less than 1dB estimation error for

Antenna matching for capacity maximization in compact MIMO systems

As MIMO technology slowly matures, it is finding its way into more wireless applications. However, some important applications, including mobile communications, require compact implementations. One important challenge in miniaturizing MIMO systems for compact terminals is to overcome capacity performance degradation resulting from mutual coupling among closely separated antennas. In this contribut

Best available technologies and techniques in the transport sector

This report has been compiled within the framework of the programme on Regional Air Pollution in Developing Countries (RAPIDC), Phase III conducted during the period 2005-2008. RAPIDC is funded by the Department of Infrastructure and Economic Cooperation (INEC) of the Swedish International Development Cooperation Agency (SIDA). It is coordinated by the Stockholm Environment Institute (SEI) and car