Propagation loss predictions: a summary

Advances in mass-loss predictions

We present the results of Monte Carlo mass-loss predictions for massive stars covering a wide range of stellar parameters. We critically test our predictions against a range of observed massloss rates – in light of the recent discussions on wind clumping. We also present a model to compute the clumping-induced polarimetric variability of hot stars and we compare this with observations of Lumino...

Mass loss summary – a personal perspective

For the occasion of the official retirement of Henny Lamers, a meeting was held to celebrate Henny’s contribution to mass loss from stars and stellar clusters. Stellar mass loss is crucial for understanding the life and death of massive stars, as well as their environments. Henny has made important contributions to many aspects of our understanding of hot-star winds. Here, the most dominant asp...

Fast Propagation Predictions for HF Network Simulations

The complexity of current HF radio networks (such as the SCOPE Command HF Global Communications System) has renewed interest in techniques for efficiently simulating long-haul HF radio networks. Because the dynamic propagation effects of skywave paths are the distinguishing characteristic of HF network simulations, we need to accurately simulate the connectivity among HF stations. Predictions o...

A GRASS GIS parallel module for radio-propagation predictions

Geographical information systems are ideal candidates for the application of parallel programming techniques, mainly because they usually handle large data sets. To help us deal with complex calculations over such data sets, we investigated the performance constraints of a classic master-worker parallel paradigm over a message-passing communication model. To this end, we present a new approach ...

Hearing loss in aging Summary