barbari is a common iranian flat bread that has a short shelf life. the effect of low density polyethylene/clay nanocomposite film was investigated for the package and shelf life of the flat bread when stored at different temperatures and relative humilities with different percentages of nanoparticles. nanoclay concentrations of 2% and 6% were used for the nanocomposite and pure polyethylene wa...

The paper presents the results of experimental and model tests transport dispersed fluid droplets forming a cloud aerosol in stream air ventilating selected section underground excavation. excavation for testing is part ventilation network Experimental Mine Barbara Central Mining Institute. For given environmental conditions, such as temperature, pressure, relative humidity, velocity air, distr...

The study uses a Monte Carlo radiative transfer model to examine the sensitivity of the UV erythemal radiation (UVER) enhancement to broken liquid water clouds of the cumulus and stratocumulus type. The model uses monochromatic radiation at 310 nm corresponding approximately to the peak of the product between irradiance and the erythemal curve. All scattering, absorption, extinction coefficient...

A co-ordinated empirical European work (Project REPRESENTATION, MM 1045) has been led in six countries, with the aim of getting an insight of pupils’representations regarding ICT. A common protocol was defined. According to it, the pupils of one classroom in each country (fourth and fifth graders) were asked to draw a computer, to label its parts and to write short texts about computer uses. Re...

Deep convective cloud content, precipitation distribution and rate, dynamics, and radiative fluxes are known to be sensitive to the details of liquidand ice-phase cloud microphysical processes. Previous studies have explored the multivariate convective response to changes in cloud microphysical parameter values in a framework that isolated the cloud and radiation schemes from the thermodynamic ...