Echoes from the Past

Echoes of the Past: Hereditarianism and A Troublesome Inheritance

In 1969, Arthur Jensen ignited a decades-long debate when he wrote that it is a ‘‘not unreasonable hypothesis that genetic factors are strongly implicated in the average Negro–white intelligence difference’’ [1]. From this he inferred that educational interventions in communities whose members have lower measured intelligence quotient (IQ) could not succeed. The errors in Jensen’s choice of dat...

Echoes from the Past: A Healthy Baltic Sea Requires More Effort

Integrated sediment multiproxy studies and modeling were used to reconstruct past changes in the Baltic Sea ecosystem. Results of natural changes over the past 6000 years in the Baltic Sea ecosystem suggest that forecasted climate warming might enhance environmental problems of the Baltic Sea. Integrated modeling and sediment proxy studies reveal increased sea surface temperatures and expanded ...

Echoes from the past: Regional variations in recovery within a harbour seal population

Terrestrial and marine wildlife populations have been severely reduced by hunting, fishing and habitat destruction, especially in the last centuries. Although management regulations have led to the recovery of some populations, the underlying processes are not always well understood. This study uses a 40-year time series of counts of harbour seals (Phoca vitulina) in the Wadden Sea to study the...

T1 Maps From Shifted Echoes and Stimulated Echoes

Theory The proposed sequence is shown in Figure 1. The basic idea is to obtain a spin echo (SE) and a stimulated echo (STE) with different T1 weighting for T1 calculation. In contrast to the FastPACE technique, both echoes were acquired separately. Then, only magnitude images are required which allows for exploiting the Half Fourier technique and using phased array coils. Acquisition of the tru...

@bullet Echoes from the Big Bang