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Agricultural intensification has led to dramatic population declines among many farmland bird species. Negative effects of intensive farming in terms of decreased local habitat quality or structural simplification of farmland landscapes have reduced both reproductive outcome and winter survival of many species. Studies investigating agricultural effects on migrating birds using farmland as stopove

Construction of the MAX IV facility started early this year. The facility will include two storage rings for the production of synchrotron radiation. The 3 GeV ring will house insertion devices for the production of x-rays while the 1.5 GeV ring will serve UV and IR users. Recently, the lattices for the storage rings in the MAX IV facility were updated. In the 3 GeV storage ring the vertical beam

Signals transmitted through Multiple-Input-Multiple-Output (MIMO) systems suffer from multiple access interference (MAI), multipath propagation and additive noise. For such systems, iterative multi-user receivers offer a good tradeoff between performance and complexity. In this paper, the complete structure of such an iterative receiver is presented. It comprises channel estimator, multi-user dete

In this paper, we argue for the design of off-task interaction in technology enchanced learning. This implies a rethinking of pedagogy which can substantially contribute to achieving specific learning goals. We describe a work-in-progress and provide concrete examples of how we deal with relevant issues raised by allowing for off-task interactions in an educational math game as an integrated learn

The aim of this study is to systematically compare parametric and non-parametric techniques for analyzing trends in annual NDVI derived from NOAA AVHRR sensor in order to examine how trend type and departure from normality assumptions affect the accuracy of detecting long-term change. To generate annual data, the mean NDVI of a four-month long ‘green’ season was computed for fifteen sites (located

We present an efficient, low-cost implementation of time-hopping impulse radio that fulfills the spectral mask mandated by the FCC and is suitable for high-data-rate, short-range communications. Key features are (i) all-baseband implementation that obviates the need for passband components, (ii) symbol-rate (not chip rate) sampling, A/D conversion, and digital signal processing, (iii) fast acquisi

Submikrona partiklar som innehåller reaktiva föreningar i en provaerosol uppsamlas för kemisk bestämning av partiklarna, utan oönskade förändringar i den kemiska sammansättningen hos partiklarna. En känd reagensvätska levereras till ett poröst material i fluidkommunikation med provaerosolen, och reagensvätskan bringas att förångas till en ånga med tillhanddahållna uppvärmningsorgan. Reagensångan b