We study discrete vortices in the anti-continuum limit of the discrete two-dimensional non-linear Schrödinger (NLS) equations. The discrete vortices in the anti-continuum limit represent a finite set of excited nodes on a closed discrete contour with a non-zero topological charge. Using the Lyapunov–Schmidt reductions, we find sufficient conditions for continuation and termination of the discre...

[1] Using an idealized, global primitive equation model of the stratosphere-troposphere system in which all tropospheric variability is surpressed, we demonstrate the existence of internal modes of stratospheric variability. The variability in our model is similar to that observed in the winter stratosphere, consisting of sudden-warming like, wave-driven decelerations of the polar vortex follow...

One of the causes of perturbation at vertical intakes is the happening of vortices with an air core. The vortices with an air core occur whenever the submergence of the intake is less than a critical value. Anti-vortex devices and specially plates are used to avoid the negative effects of the air-core vortices. If plates are used, then the geometry of them should be studied experimentally. Acco...

Optical beams carrying orbital angular momentum (OAM) can find tremendous applications in several fields. In order to apply these particular beams in photonic integrated devices innovative optical elements have been proposed. Here we are interested in the generation of OAM-carrying beams at the nanoscale level. We design and experimentally demonstrate a plasmonic optical vortex emitter, based o...

Optical complex fields have attracted increasing interests because of the novel effects and phenomena arising from the spatially inhomogeneous state of polarizations and optical singularities of the light beam. In this work, we propose a spiral blade plasmonic vortex lens (SBPVL) that offers unique opportunities to manipulate these novel fields. The strong interaction between the SBPVL and the ...

Efficient and safe heparin anticoagulation has remained a problem for continuous renal replacement therapies and intermittent hemodialysis for patients with acute renal failure. To make heparin therapy safer for the patient with acute renal failure at high risk of bleeding, we have proposed regional heparinization of the circuit via an immobilized heparinase I filter. This study tested a device...

The Data Vortex photonic packet switching architecture is designed to be a low-latency topology with minimal node complexity and a high degree of scalability [1,2]. The nodes from which this system is assembled require widebandwidth switching devices with very fast transitioning and minimal signal degradation. Semiconductor optical amplifiers (SOAs) have been selected as the most promising acti...

Vortex generators (VGs) are a passive method by which to alleviate boundary layer separation (BLS). The device-induced streamwise vortices propagate downstream. There is then lift-off from the surface and vortex decays. effectiveness of VGs depends on their geometrical configuration, spacing, flow characteristics. In high-speed regime, must be properly positioned upstream BLS region. Measuremen...

Uveal effusion syndrome (UES) was reported by Schepens and Brockhurst in 1963,1 and later described as a nanophthalmic disorderwith a scleral abnormality.2 Gass3 described idiopathicUES and hypothesized that the causewas a congenital anomalyof the sclera and vortex veins that was related to aging, hormonal changes, or impairment of the permeabilityof the sclera.Using histologicalmethods,Trelsta...