The problem of signal direction-of-arrival (DOA) estimation in partly calibrated arrays composed of multiple subarrays with unknown intersubarray parameters and imperfectly known subarray orientations is studied. The recently developed spectral and root versions of the rank reduction estimator (RARE) are applicable to scenarios where no intersubarray calibration is available, but unfortunately,...

This paper revisits a model for elliptic curves over Q introduced by Huff in 1948 to study a diophantine problem. Huff’s model readily extends over fields of odd characteristic. Every elliptic curve over such a field and containing a copy of Z/4Z× Z/2Z is birationally equivalent to a Huff curve over the original field. This paper extends and generalizes Huff’s model. It presents fast explicit f...

Biomolecules are often very long with a definite chirality. DNA, xanthan and poly-γbenzyl-glutamate (PBLG) can all form columnar crystalline phases. The chirality, however, competes with the tendency for crystalline order. For chiral polymers, there are two sorts of chirality: the first describes the usual cholesteric-like twist of the local director around a pitch axis, while the second favors...

Lithium ion transport in a poly-(ethylene oxide) (PEO) branched nanopore filled with solution of [lithium][bis(trifluoromethanesulfonyl)imide]/[1-butyl-1-methylpyrrolidinium][bis(trifluoromethanesulfonyl)imide] (LiTFSI/PYR14TFSI) was investigated by molecular dynamics using many-body polarizable force field. The structural and dynamic properties lithium ions the nanopores different sizes ratios...

The migration of vascular endothelial cells under flow can be modulated by the addition of chemical or mechanical stimuli. The aim of this study was to investigate how topographic cues derived from a substrate containing three-dimensional microtopography interact with fluid shear stress in directing endothelial cell migration. Subconfluent bovine aortic endothelial cells were seeded on fibronec...

Electrospun fibrous scaffolds are being developed for the engineering of numerous tissues. Advantages of electrospun scaffolds include the similarity in fiber diameter to elements of the native extracellular matrix and the ability to align fibers within the scaffold to control and direct cellular interactions and matrix deposition. To further expand the range of properties available in fibrous ...

Article history: Available online 31 March 2010

The paper deals with the problem of mobile location in the presence of angular scattering. The proposed approach consists in using the knowledge of the Power Angle Density (PAD) to estimate the azimuth, the sight of the mobile and their respective angular spread.