Expense items: test on items generating inflation

This study aims to spot the inflation – generating expenses. The expenses items are represented by series of prices statistical indexes. We are going to determine the series of gaps on these prices indexes. We will afterwards study the data- generating process in the context of the ARCH model and the V-GARCH model. We will find out the following items (food, clothes and transports) as inflation- generating items

Stock Market Indexes: A random walk test with ARCH (q) disturbances

We will here study the stock market indexes, in the context of a random walk test with ARCH (q) disturbances. This model based on these theoretical predictions has been valuated from the Tunis Stock market data. The coherence of the parameters signs and the statistical relevance of the estimations are validating the choice of the conditionally heteroskedastic random walk mode

Stock Market Indexes: A random walk test with ARCH (q) disturbances

We will here study the stock market indexes, in the context of a random walk test with ARCH (q) disturbances. This model based on these theoretical predictions has been valuated from the Tunis Stock market data. The coherence of the parameters signs and the statistical relevance of the estimations are validating the choice of the conditionally heteroskedastic random walk mode

4-Hydr­oxy-3-[(2E)-3-(3,4,5-trimethoxy­phen­yl)prop-2-eno­yl]-2H-chromen-2-one

A new chalcone of the coumarin, C21H18O7, containing an annulated α-pyrone ring, was obtained by condensation of the borate complex of ac­yl(hydr­oxy)coumarin with trimethoxy­benzaldehyde. The structure exhibits intra­molecular hydrogen bonding between the hydroxyl oxygen and the ketonic oxygen in the coumarin group. The bicyclic coumarin fragment and the benzene ring form a dihedral angle of 17.1 (4)°. The crystal packing involves dimers inter­connected by C—H⋯O hydrogen bonding

3-D Numerical Study of Hydromagnetic Double Diffusive Natural Convection and Entropy Generation in Cubic Cavity

In the present work, the effect of magnetic field on double diffusive natural convection in a cubic cavity filled with a binary mixture is numerically studied using the finite volume method. Two vertical walls are maintained at different temperatures and concentrations. The study is focused on the determination of the entropy generation due to heat and mass transfer, fluid friction and magnetic effect. The influence of the magnetic field on the three-dimensional flow, temperature and concentration fields, entropy generation and heat and mass transfer are revealed. The main important result of this study is that the increase of Hartmann number damped the flow and homogenized the entropy generation distribution in the entire cavity