We report the discovery of variable circularly polarised radio emission associated with relativistic ejections from GRS 1915+105, based on observations with the Australia Telescope Compact Array (ATCA) and the Multi-Element Radio-Linked Interferometer Network (MERLIN). Following a radio flare in 2001 January, significant and variable circular polarisation, at a fractional level of 0.2–0.4%, was...

The long-term corrosion behaviour of reinforcing steel embedded in alkali-activated mortars (AAMs) prepared with three different binder compositions was monitored over a 360-day period by cyclic wetting/drying and spraying chloride solution. Corrosion potential polarisation resistance were determined linear polarisation, individual mortar electrochemical impedance spectroscopy, Tafel slopes pot...

The polarisation of light is used by many species of cephalopods and crustaceans to discriminate objects or to communicate. Most visual systems with this ability, such as that of the fiddler crab, include receptors with photopigments that are oriented horizontally and vertically relative to the outside world. Photoreceptors in such an orthogonal array are maximally sensitive to polarised light ...

Fostered by the recent progress of the fields of plasmonics and metamaterials, the seminal topic of light scattering by clusters of nanoparticles is attracting enormous renewed interest gaining more attention than ever before. Related studies have not only found various new applications in different branches of physics and chemistry, but also spread rapidly into other fields such as biology and...

We numerically compute light and polarization curves of γ-ray burst afterglows for various configurations of the jet structure and for different dynamical evolutions. We consider a standard homogeneous jet and a structured jet with power-law wings. We show that the lightcurves from these two configurations are very similar to each other, and therefore only very high quality data could allow us ...

Recent observations of the polarisation of the optical pulses from the Crab pulsar motivated detailed comparative studies of the emission predicted by the polar cap, the outer gap and the two-pole caustics models. In this work, we study the polarisation properties of the synchrotron emission emanating from the striped wind model. We use an explicit asymptotic solution for the large-scale field ...

The use of the polarisation properties of light for the determination of significant aspects of surfaces in an industrial setting is considered. It is concluded that the technique is both general and robust enough to warrant development. An example is presented of the use of the polarisation signature of surfaces to achieve efficient segmentation of metals and dielectrics in the presence both o...

There is quite a number of puzzling phenomena in astrophysics that could be clarified with the existence of very light scalar or pseudoscalar particles, commonly refered to as axion-like particles (a.k.a. ALPs). One of the main reasons is that these hypothetical particles can have a coupling to photons inside external magnetic fields, as in the axion case [1], and can lead to observable signatu...

Biochanin A is a naturally occurring isoflavone, most commonly found in legumes, especially in soya beans or in red clover. The spectrum of biochanin As biological activities is very wide: it displays antioxidative, cardioprotective, anti-inflammatory, anticancer and enzyme inhibitory properties. At least some of those activities may involve the interaction of biochanin A with the lipid phase o...

We propose a method for polarising antiprotons in a storage ring by means of a polarised positron beam moving parallel to the antiprotons. If the relative velocity is adjusted to v/c ≈ 0.001 the cross section for spin exchange is as large as 〈σPzz〉 ≈ 2 ·10 barn as shown by new QED-calculations. Two possibilities to provide a positron source with sufficient flux density are presented. A polarise...