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Effects of lattice reordering on Schnorr-Euchner decoding algorithms for MIMO systems

Schnorr-Euchner (SE) decoding algorithm for MIMO sys tems has been shown to approach the performance of Maximum-likelihood decoder with low complexity. There are two kinds of SE decoder, sequential SE and K-best SE. The lattice reordering, as the preprocessing of the SE de coder, is divided into four modes in this paper, according to post-detection signal-to-noise ratio (SNR) and channel noise lev

Interaction between fixed dual particles at moderate Reynolds numbers

Numerical simulations of 3D flow past two identical spheres which are held fixed relative to each other at different separation distances and angles (which describe the deviation from the centre line of the trailing particle) are carried out. Particle Re = 300 is used to investigate the dependency of drag and lift coefficients on the separation distances and the angles. The simulations are perform

Nonlinear Analysis of Cavities in Rock Salt

The paper covers some material and computational aspects of the rock mechanics of leached cavities in salt. A material model is presented in which the instantaneous stiffness of the salt is obtained by interpolation between the unloaded state and a relevant failure state. The model enables prediction of short term triaxial behaviour from uniaxial stress-strain curves. Key results from a nonlinear

Segregation of Women in Public Space in Iran

As part of a systematic endeavor to Islamize the society, Iranian Islamic government has bestowed efforts to create gender-segregated public urban spaces. The gender segregation was formally enforced in public places such as schools, sport halls, swimming pools, transportation facilities, etc. in last three decades. The most recent effort of the government includes “women-only parks”, claimed to b

Articulating the role of Greece in the economic crisis: an analysis of the media discourses of the extreme right in Denmark and Sweden

The rise of the far right in Europe is central to an understanding of the new political variables emerging in the face of the European economic crisis. This paper focuses on the media representations of Greece and its role in the economic crisis by extra-parliamentarian groups of the far right in Denmark and Sweden. It demonstrates how the parliamentary extreme right in these countries “blame” Gre

Stimulus Duration and Type in Perception of Female and Male Speaker Age

In a small perception study, our ability to estimate speaker age from speech samples was investigated with respect to stimulus duration, stimulus type and speaker gender. Four separate listening tests were carried out with four different sets of stimuli: 10 and 3 seconds of spontaneous speech, one isolated word, and 6 concatenated isolated words, all produced by the same 24 speakers. The results s

Estimation of absorbed PAR across Scandinavia from satellite measurements. Part II: modeling and evaluating the fractional absorption.

The aim of this study is to generate a quality-controlled sub-kilometer dataset of the fraction of absorbed photosynthetically active radiation (FAPAR) across Scandinavia from satellite. FAPAR is required for estimating the amount of PAR absorbed (APAR) by vegetation, which in turn allows for estimation of carbon uptake. In this study, FA-PAR was modeled from normalized difference vegetation index

A Case Study in Model Reduction of Linear Time-Varying Systems

In this paper, the balanced truncation procedure is applied to time-varying linear systems, both in continuous and in discrete time. The methods are applied to a linear approximation of a diesel exhaust catalyst model. The reduced-order systems are obtained by using certain projections instead of direct balancing. An approximate zero-order-hold discretization of continuous-time systems is describe

Scattering from frequency selective surfaces: An efficient set of V-dipole basis functions

In this paper a novel set of V-dipole basis functions is introduced. These basis functions are used to approximate the induced surface current density on an infinite, plane frequency selective surface (FSS). The elements of the FSS are supposed to consist of straight sections and bends. Two groups of elements which the present V-dipole basis functions can be applied to are identified, namely the cen