Polarisation measurements on the Cosmological Microwave Background (CMB) will be very difficult as the expected polarisation is not expected to exceed 10% of the signal. Therefore, noises of all origins must be searched for and carefully extracted. Low frequency drifts are expected to arise from mechanic, thermal and electronic origin. If not suitably treated they induce stripes on sky maps suc...

I describe the current status of the analysis of the 1st season’s data taken with the QUaD Cosmic Microwave Background (CMB) polarisation telescope. QUaD is a CMB polarisation bolometer-array telescope. The instrument was installed at the South Pole over the 2004-05 Austral Summer and completed its first season of observations during the 2005 Austral Winter. The analysis of these data is in an ...

In this work we present a theoretical study of the effect of disorder on spin polarisation at the Fermi level, and the disorder formation energies for Co₂FexMn1-xSi (CFMS) alloys. The electronic calculations are based on density functional theory with a Hubbard U term. Chemical disorders studied consist of swapping Co with Fe/Mn and Co with Si; in all cases we found these are detrimental for sp...

The problem is addressed of how much hot star polarisation variability can result from density redistribution processes within the wind as opposed to localised enhancement of stellar mass loss rate, such as ejections of wind inhomogeneities. For optically thin electron scattering, we present a theory for the relative polarisation arising from particle redistribution and consider several specifi...

In epithelial tissues, polarisation of microtubules and actin microvilli occurs along the apical-basal axis of each cell, yet how these cytoskeletal polarisation events are coordinated remains unclear. Here, we examine the hierarchy of events during cytoskeletal polarisation in Drosophila melanogaster epithelia. Core apical-basal polarity determinants polarise the spectrin cytoskeleton to recru...

The precision physics program of the ILC requires precise knowledge of the state of beam polarisation. In fact the Compton polarimeters intended for the ILC will have to measure the polarisation with error a factor of 2 smaller than the previous best measurement at the SLAC SLD experiment. In order to further reduce measurement error, spin tracking simulations in the ILC Beam Delivery System su...