Figure 1. Schematic illustration of the two-step mechanism of nucleation of crystals. A dense liquid cluster forms. A crystal nucleus may form inside the cluster. Top: Macroscopic viewpoint of events. Bottom: The free-energy ΔG along two possible versions of the two step nucleation mechanism. 0 L L G − Δ is the standard free energy of formation of dense liquid phase and 0 C G Δ —that of formati...

Phosphorus input with excessive use of fertilizers and manure as one the main sources nutrient pollution has increased recently in wastewater result intensive farming industrialized densely populated areas. The novelty current work lies improving a Vertical Aerated Rock Filter (VARF) using steel slag limestone media to enhance efficiency rock filter (RF) eliminate total phosphorus (TP) from dom...

For dyanmic background models of Goldreich & Weber and Lou & Cao, we examine three-dimensional perturbation properties of oscillations and instabilities in a general polytropic homologously collapsing stellar core of a relativistically hot medium with a polytropic index γ = 4/3. Perturbation behaviours, especially internal gravity g−modes, depend on the variation of specific entropy in the coll...

in this paper we investigate the behavior of solutions, stable and unstable of the solutions a second-order rational difference equation. also we will discuss about the behavior of solutions a the rational system, we show these solutions may be stable or unstable.

Nebivolol is a novel beta1-selective beta-blocker with vasodilator properties mediated through activation of the l-arginine-nitric oxide pathway. There is no published report of coronary artery spasm associated with nebivolol. We describe a 64-year-old female patient who developed unstable angina secondary to nebivolol-induced vasospastic angina which was also visible during coronary angiography.

In a previous paper the authors developed a new algorithm for finding discrete approximations to (possibly unstable) disc-like minimal surfaces. Optimal convergence rates in the H norm were obtained. Here we recall the key ideas and prove optimal L convergence rates.

C-reactive protein (CRP) response was studied in 44 patients with acute angina pectoris admitted to the coronary care unit. 71 % of patients with acute myocardial infarction (MI)had positive CRP test while 73% of patients presumed to have unstable angina pectoris had negative CRP test. This test can be helpful in differentiating between acute MI and unstable angina pectoris.

It is shown that static purely electric or purely magnetic abelian field configurations in Yang-Mills theory are unstable when the electric or magnetic field strength is too large over too wide a region. The critical parameter is gEL2 (gBL2) where E (B) is a measure of the field strength, and L is a measure of the distance over which such field strengths extend.