Elliptical Lens Model in PG 1115+080

Planar elliptical solid immersion lens based on a Cartesian oval

Substructures in lens galaxies : PG 1115 + 080 and B 1555 + 375 , two fold configurations

We study the anomalous flux ratio which is observed in some four-image lens systems, where the source lies close to a fold caustic. In this case two of the images are close to the critical curve and their flux ratio should be equal to unity, instead in several cases the observed value differs significantly. The most plausible solution is to invoke the presence of substructures, as for instance ...

Pancreatic cross-section: an elliptical model.

BACKGROUND Pancreatic surgery has developed over the last 60 years. A pancreaticoduodenectomy of the pancreatic head and duodenal papilla is the most common procedure. The most popular pancreatic cross-section site of a pancreaticoduodenectomy is the isthmus of the gland. The pancreatic isthmus anatomical configuration is still being considered. STUDY DESIGN The authors propose a new parametr...

BL-GARCH model with elliptical distributed innovations

We are interested in the parametric class of Bilinear GARCH (BL-GARCH) models which are capable of simultaneously capturing the well known properties of financial retrun series, volatility clustering and leverage effects. Specifically, as it is often observed that the distribution of many financial time series data has heavy tails, heavier than the Normal distribution, we examine, in this paper...

Elliptical Subject Specific model for respiratory motion

Background Respiratory motion of the heart poses a problem for high resolution cardiac MR imaging. Prospective slice following uses the navigator position immediately prior to the imaging segment to correct the slice positions throughout the segment [1]. The navigator is typically placed over the right hemi-diaphragm and a fixed correction factor is used to adjust for the difference to the moti...