The article discusses the results of experimental studies on course pyrolysis oil injection through high-pressure injector a direct-injection engine. used for tests was derived from waste plastics (mainly high-density polyethylene—HDPE). This then distilled. also describes production technology this laboratory scale. It presents chemical composition raw and after distillation process using GC-M...

Polyoxymethylene dimethyl ether (PODE) is a low-viscosity oxygenated fuel that can improve the volatility of blended fuels. In this work, macroscopic and microscopic spray characteristics diesel-PODE3-4 under different ambient temperatures injection pressures (IP) are studied. The studied blends consisted pure diesel (P0), two blend fuels 20% (P20) 50% (P50) by volume fraction PODE3-4. Mie scat...

The effect of topical carteolol 1%, a beta-adrenergic blocker with intrinsic sympathomimetic activity, on the retinal circulation was investigated in 15 normal subjects using laser Doppler velocimetry and monochromatic fundus photography. In a double-masked randomized design, one eye received one drop of carteolol 1% and the fellow eye one drop of placebo. Vessel diameter, maximum erythrocyte v...

Plusieurs études opèrent une distinction nette entre l’urbanisme des Trente Glorieuses et du tournant millénaire. En s’appuyant sur les trajectoires de développement villes suisses Zurich Winterthour, cet article montre que la transition ces deux ères urbanistiques n’est pas linéaire. Ce processus se compose également d’échecs retentissants dus au caractère hybride projets centres-villes conçus...

Atomization spray of non-Newtonian liquid plays a pivotal role in various engineering applications, especially for the energy utilization. To operate spray systems efficiently and well understand the effects of liquid rheological properties on the whole spray process, a comprehensive model using Euler-Lagrangian approaches was established to simulate the evolution of the atomization spray for v...

The present study proposes novel micro-jet impingement heat sink with effusion holes for flow extraction. The design consists of impingement nozzles surrounded by multiple effusion holes to take away the spent fluid. A three-dimensional numerical model is used for steady, incompressible, laminar flow and conjugate heat transfer for the performance analysis of the proposed design. The computatio...

It is well-known that the second smallest eigenvalue 22 of the difference Laplacian matrix of a graph G is related to the expansion properties of G. A more detailed analysis of this relation is given. Upper and lower bounds on the diameter and the mean distance in G in terms of 22 are derived.