A simple thermodynamical witness showing universality of macroscopic entanglement

We show that if the ground state entanglement exceeds the total entropy of a given system, then this system is in an entangled state. This is a universal entanglement witness that applies to any physical system and yields a temperature below which we are certain to find some entanglement. Our witness is then applied to generic bosonic and fermionic many body systems to derive the corresponding "critical" temperatures that have a very broad validity.Comment: 3 pages, Torun conference, June 25-28, 200

Supplementation of olive mill wastes in broiler chicken feeding

This work was conducted in order to study the value of olive mill wastes as diet on the growth performance, abdominal and muscle fat deposition, adipose and muscle tissues fatty acid composition in broilers. 200 male chickens that were 2 weeks old, 50 for each diet, were assigned to one of the three diets containing 5, 10 or 15% olive mill wastes (OMW) compared to control diet (CD). There were no significant differences in body and weight gain, final body carcass, thighs and pectoral muscle weight between birds. The same observation was seen for abdominal tissue fat (% of body weight) of which no differences were detected in birds fed OMW diet compared to those fed on the control diet. Linoleic acid proportion increases significantly in the pectoral muscle (p < 0.0001) with the three diets containing OMW, but its level decreases in tight muscle with 5 and 10% OMW diets (p < 0.0001) and remainunchanged in abdominal fat. Oleic acid proportion increases in thigh muscle (p < 0.006) and remain unchanged in pectoral muscle and in abdominal adipose tissue. Palmitic acid proportion decreasessignificantly in pectoral muscle (p < 0.0001) and in abdominal adipose tissue (p < 0.002), but increases significantly in thigh muscle (p < 0.05). In conclusion, OMW diet gives attractive results. It bringsidentical growth performances and affect abdominal and muscle fat deposition and fatty acid composition

Numerical investigations on high-power laser cutting of metals

A theoretical approach based on a numerical simulation using experimental data is proposed as a contribution for the study of laser metal cutting under gas assistance. The aim is to simulate the stages of the kerf formation by considering the induced generated melt film dynamics, while it interacts with the laser beam and the assisting gas jet. For normal atmospheric conditions, a 3D model is developed using the finite volume method to solve the governing hydrodynamic equations, supplied with the species conservation equation. The present air, the metallic liquid, and the solid metal are considered as phases, where the interface positions are tracked by implementation of the volume-of-fluid method through Fluent CFD code, whereas an enthalpic method is used to take into account the material melting and resolidification. The results for six operating conditions in relation to the cutting velocity show an interesting agreement with the experimental observations

Comportement de différentes biomasses marocaines dans la fabrication de composites bois-ciment/gypse

Cet article original nous propose d'étudier le comportement de différentes biomasses marocaines dans la fabrication de composites bois-ciment et bois-gypse. Il offre ainsi des perspectives sérieuses de valorisation des biomasses étudiées, mais aussi des avantages socio-économiques liés à l'amélioration de l'habitat et au développement de nouvelles entreprises

EM modelling of arbitrary shaped anisotropic dielectric objects using an efficient 3D leapfrog scheme on unstructured meshes

The standard Yee algorithm is widely used in computational electromagnetics because of its simplicity and divergence free nature. A generalization of the classical Yee scheme to 3D unstructured meshes is adopted, based on the use of a Delaunay primal mesh and its high quality Voronoi dual. This allows the problem of accuracy losses, which are normally associated with the use of the standard Yee scheme and a staircased representation of curved material interfaces, to be circumvented. The 3D dual mesh leapfrog-scheme which is presented has the ability to model both electric and magnetic anisotropic lossy materials. This approach enables the modelling of problems, of current practical interest, involving structured composites and metamaterials

Kinetin riboside and its ProTides activate the Parkinson's disease associated PTEN-induced putative kinase 1 (PINK1) independent of mitochondrial depolarization

Since loss of function mutations of PINK1 lead to early-onset Parkinson’s disease, there has been growing interest in the discovery of small molecules that amplify the kinase activity of PINK1. We herein report the design, synthesis, serum stability and hydrolysis of four kinetin riboside ProTides. These ProTides, along with kinetin riboside, activated PINK1 in cells independent of mitochondrial depolarization. This highlights the potential of modified nucleosides and their phosphate prodrugs as treatments for neurodegenerative diseases

Using Radar Remote Sensing from Space to Monitor Dams

Monitoring dams is critical for identifying vulnerabilities affecting its performance and managing the risk of failure. Traditionally, dam monitoring is performed by a combination of visual surveillance and instrumentation. American Society of Civil Engineers (ASCE) has been giving a D grade for the nation’s 91,000-plus dams since the beginning of the grading system (1998) to date. The traditional approach can be subjective and laborious, considering the monitoring needs in the United States. This study presents the Interferometric Synthetic Aperture Radar (InSAR) application for monitoring deformations at dam sites to understand its vulnerability. The study evaluates the use of InSAR at three (two in India and one in the United States) dam sites to monitor its safety. The Sentinel-1 and ENVISAT Advanced Synthetic Aperture Radar (ASAR) images were processed using Persistent Scatterers Interferometry (PSI). Results indicate that, combined with traditional methods, remote sensing using radar offers an opportunity for long-term dam monitoring and the development of a deformation-based early warning system