Polarisation sensitivity (PS) - the ability to detect the orientation of polarised light - occurs in a wide variety of invertebrates [1] [2] and vertebrates [3] [4] [5], many of which are marine species [1]. Of these, the crustacea are particularly well documented in terms of their structural [6] and neural [7] [8] adaptations for PS. The few behavioural studies conducted on crustaceans demonst...

Abstract Fujita and Li have given a characterisation of K-stability Fano variety in terms quantities associated to valuations, which has been essential all recent progress the area. We introduce notion valuative stability for arbitrary polarised varieties, show that it is equivalent with respect test configurations integral central fibre. The numerical invariant governing modelled on Fujita’s $...

Abelian surfaces over C with a polarisation of type (1, t), t a positive integer, are parametrised by a coarse moduli space At which is a quasiprojective variety. In this paper we shall concentrate on the case where t is a prime p ≥ 5, and show that for p sufficiently large (in fact p ≥ 173) any algebraic compactification of Ap is of general type. A few results similar to this are already known...

A novel visual capability, the detection of circularly polarised light, has been demonstrated in a mantis shrimp, a colourful crustacean from tropical reefs.

This paper outlines the development of a new circular array of dual-polarised Fractalled Exponential Flare antennas for use as a wideband Direction-Finding (DF) array. The prototype array had a number of limitations which lead to the development of some novel array concepts to overcome these problems. These concepts include a high frequency inwardfacing array and a dual-polarised array that use...