Directional couplers are critical components in photonic integrated circuits used in optical communication systems. The conventional directional couplers with laterally arranged waveguides can not achieve very short coupling lengths due to extreme sensitivity to fabrication variations and limitations to produce uniformly very narrow gap layers.1) Vertical directional couplers, however, can obta...

various dermatoglyphic parameters like finger print pattern, atd angle, absolute ridge count & ab, bc ,cd, and ad ridge counts were observed in 150 cases of congenital cardiac disease, comprising of 72 cases of ventricular septal defects (vsd), 60 cases of atrial septal defects (asd), 9 cases of coarctation of aorta (coa) & 9 cases of tetralogy of fallot’s (tof). same dermatoglyphic parameters ...

We prove short-time existence of smooth solutions for a class of nonlinear, and generally spatially nonlocal, Hamiltonian evolution equations that describe the self-interaction of weakly nonlinear scale-invariant waves. These equations include ones that describe weakly nonlinear hyperbolic surface waves, such as nonlinear Rayleigh waves in elasticity.

In the north Indian Ocean (NIO), maps of sea level anomaly from satellite altimetry were analysed January-1995 to December-2000. The study attempted trace trajectories individual mesoscale anomalies manually and understand seasonal changes in terms phase speed. Mesoscale are detected as concentric circular shapes diameters ~90 km 600 minimum 30 days life cycle. Relatively higher eddy kinetic en...

The temperature inversions that produce superior mirages are capable of supporting gravity (buoyancy) waves of very low frequency and long wavelength. This paper describes the optics of single mode gravity waves that propagate in a four-layer atmosphere. Images calculated by ray tracing show that (1) relatively short waves add a fine structure to the basic static mirage, and (2) long waves prod...

In plate tectonic theory a weak asthenosphere is required to facilitate the motions of rigid plates. Partial melt could weaken mantle, in turn impacting convection, but date existence persistent has remained controversial. A wide range scenarios been reported terms location, amount and pathways melt. Here we use data collected by 39 ocean bottom seismometers deployed near equatorial Mid-Atlanti...

objective: alveolar ridge preservation in patients with inadequate bone volume is one treatment option for successful implant placement and can be done by using bone graft materials. on the other hand, ceno bone has been recently produced by hamanand saz baft kish co. as a bone bioimplant of allograft origin. this study aimed to assess the clinical, histologic and histomorphometric results of b...

With this case report we demonstrate a new technique useful in augmenting alveolar ridges after resection procedures or atrophic loss of volume. The augmentation is done by means of a new osteogenic distractor (manufactured by ACE Surgical Supply Co., Inc., Brockton, MA, USA), the distraction procedure is according to Ilizarov's principles.

In this note, we provide an elementary analysis of the prediction error ridge regression with random design. The proof is short and self-contained. particular, it bypasses use Rudelson’s deviation inequality for covariance matrices, through a combination exchangeability arguments, matrix perturbation operator convexity.