Fracture characterisation using geoelectric null-arrays

Null steering of dolph-chebychev arrays using taguchi method

Dolph-Chebychev arrays are known to exhibit the best compromise between sidelobe level and directivity. However, they place a constraint on the null locations. Any attempt to impose nulls or get them deeper will impact the directivity/sidelobe level trade-off. In this work, null placement in Dolph-Chebychev arrays through element position perturbation is carried out based on Taguchi method whil...

Identification and characterisation of eight novel SERPINA1 Null mutations

BACKGROUND Alpha-1 antitrypsin (AAT) is the most abundant circulating antiprotease and is a member of the serine protease inhibitor (SERPIN) superfamily. The gene encoding AAT is the highly polymorphic SERPINA1 gene, found at 14q32.1. Mutations in the SERPINA1 gene can lead to AAT deficiency (AATD) which is associated with a substantially increased risk of lung and liver disease. The most commo...

Beamforming with Wide Null Sectors for Realistic Arrays Using Directional Weighting

Null-steering LMS Dual-Polarised Adaptive Antenna Arrays for GPS

The implementation of a null-steering antenna array using dual polarised patch antennas is considered. Several optimality criterion for adjusting the array weights are discussed. The most effective criteria minimises the output power of the array subject to maintaining a right hand circular polarisation (RHCP) response on the reference antenna. An unconstrained form of this criteria is derived,...

Motion Characterisation using FID navigators and Spatial Pattern of MRI Coil Arrays

T. Kober, J. P. Marques, R. Gruetter, and G. Krueger Laboratory for functional and metabolic imaging, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland, Advanced Clinical Imaging Technology, Siemens Suisse SA CIBM, Lausanne, Switzerland, Department of Radiology, University of Lausanne, Lausanne, Switzerland, Departments of Radiology, Universities of Lausanne and Geneva, Switzerland