Nitric oxide (NO) gas is known as both a vasodilator and a toxin. It can react with oxygen to form compounds more toxic than itself, such as nitrogen dioxide (NO2). The reactions are time dependent; thus, infusing NO into breathing circuits as close to ventilated subjects as possible may help minimize toxic byproduct exposure. Unfortunately, flow rates commonly used with mechanical ventilation ...

The paper is dedicated to the investigations of purely viscous fluids in constant velocity squeeze flow, between two parallel disks. The influence of fluid rheological properties on normal force distribution and the interpretation of the obtained results is investigated. The analysis includes both experimental and numerical investigations. All results are being compared with theoretical predict...

In this note under a crucial technical assumption we derive a differential equality of Yamabe constant Y (g (t)) where g (t) is a solution of the Ricci flow on a closed n-manifold. As an application we show that when g (0) is a Yamabe metric at time t = 0 and Rgα n−1 is not a positive eigenvalue of the Laplacian ∆gα for any Yamabe metric gα in the conformal class [g0], then d dt ∣∣ t=0 Y (g (t)...

A maximum flow over time generalizes standard maximum flow by introducing a time component. The object is to send as much flow from source to sink in T time units as possible, where capacities are interpreted as an upper bound on the rate of flow entering an arc. A related problem is the universally maximum flow, which is to send a flow from source to sink that maximizes the amount of flow arri...

We show that the WZNW model with arbitrary σ-model coupling constant may be viewed as a σ-model perturbation of the WZNW theory around the Witten conformal point. In order for the σ-model perturbation to be relevant, the level k of the underlying affine algebra has to be negative. We prove that in the large |k| limit the perturbed WZNW system with negative k flows to the conformal WZNW model wi...

We analytically study how the behaviour of accretion flows changes when the flow model is varied. We study the transonic properties of the conical flow, a flow of constant height and a flow in vertical equilibrium and show that all these models are basically identical provided the polytropic constant is suitably changed from one model to another. We show that this behaviour is extendible even w...

In order to resolve the cosmological constant problem, notion of reference frame is re-examined at quantum level. By using a non-linear sigma model (Q-NLSM), theory spacetime proposed. The underlying mathematical structure new geometry endowed with intrinsic second central moment (variance) or even higher moments its coordinates, which generalizes classical Riemannian based on only first (mean)...