On Delays in Management Frameworks: Metrics, Models and Analysis

Management performance evaluation means assessment of scalability, complexity, accuracy, throughput, delays and resources consumptions. In this paper, we focus on the evaluation of management frameworks delays through a set of specific metrics. We investigate the statistical properties of these metrics when the number of management nodes increases. We show that management delays measured at the application level are statistically modeled by distributions with heavy tails, especially the Weibull distribution. Given that delays can substantially degrade the capacity of management algorithms to react and resolve problems it is useful to get a finer model to describe them.We suggest theWeibull distribution as a model of delays for the analysis and simulations of such algorithms

Étude géophysique du site du barrage d’Oum Laksab (Tunisie Centre-Ouest)

Pour mieux concevoir les ouvrages d’exploitation d’eau et les orienter vers les sites les plus favorables, la caractérisation de la structure géologique et géométrique tridimensionnelle demeure importante, nécessitant l’utilisation d’outils de reconnaissance très élaborés.La connaissance géophysique du site du barrage souterrain d’oued Oum Laksab s’est basée sur l’application des méthodes géophysiques (électrique et sismique réfraction). Elle est effectuée dans le lit de l’oued afin d’étudier les variations lithologiques et définir le cadre géotechnique. En effet, les horizons géoélectriques et géosismiques mis en évidence montrent l’existence d’un niveau conducteur qui pourrait correspondre à des argiles. Cette série d’une dizaine de mètres d’épaisseur pourrait servir comme un écran souterrain imperméable efficace

Mise au point et validation d'un système de stadification dans la Sclérose Latérale Amyotrophique

International audienc

Chemical Composition and Cytotoxic Activity of Eucalyptus torquata Luehm. and Eucalyptus salmonophloia F. Muell. Trunk Bark Essential Oils against Human SW620 and MDA-MB-231 Cancer Cell Lines

In recent years, there has been a growing interest in the screening of natural active ingredients from Eucalyptus essential oils because of their evident importance in practical utility and their undeniable therapeutic properties. Based on this, the aim of the present study was to investigate the chemical profile of the essential oils of the trunk bark of Eucalyptus torquata Luehm. (ETEO), and E. salmonophloia F. Muell. (ESEO), growing in Tunisia. The in vitro cytotoxic properties of the extracted EOs were also evaluated against two human cancer cell lines: breast carcinoma cell lines MDA-MB-231 and colorectal cancer cell lines SW620. The analysis by gas chromatography coupled with mass spectrometry (GC/MS) led to the identification of 32 compounds from the ETEO, with the dominant constituents being the monoterpenes trans-myrtanol (73.4 %) and myrtenol (4.7 %), and the apocarotene (E)-β-ionone (3.9 %). In the case of ESEO, 29 compounds were identified with trans-myrtanol (25.0 %), decanoic acid (22.1 %), nonanoic acid (9.8 %), γ-elemene (6.5 %), γ-maaliene (5.5 %), and α-terpineol (5.3 %) as the main components. The cytotoxicity of EOs against the two chosen cell lines was tested using Crystal Violet Staining (CVS) assay and 5-fluorouracil as a reference drug. The two EOs exhibited a significant dose-dependent inhibition against the viability of the used cell lines. Their inhibitory effects were particularly observed towards SW620 colon carcinoma cells with IC50 values of 26.71±1.22 and 22.21±0.85 μg/mL, respectively, indicating that both oils were more cytotoxic for SW620 cells compared to MDA-MB-231 one