Abstract The analysis of mathematical modeling results on premise heating by a gas infrared emitter (GIE) during supply and exhaust ventilation operation is presented in this article. model one-dimensional non-stationary setting for an incompressible medium with allowances the radiant heat flux transfer between opaque solid surfaces air. air transparent to thermal radiation. traditional k-ε use...

In order to investigate the effect of environmental wind on a tunnel with one blocked end fire under natural ventilation, series numerical simulations were conducted using large eddy simulation method in this study. The model is established by software FDS, and 36 groups working conditions such as speed 0-5m / s angle 45-135 are simulated. Combined results smoke spread, temperature velocity vec...

The article presents verification and validation of a numerical model conjugated heat mass transfer processes aerodynamics in fixed "honeycomb" type regenerator with square channels for recovery from the exhaust air local ventilation system. are simulated by CFD method. influence condensation evaporation moisture humid on efficiency has been investigated through these simulations is shown artic...

Many kinds of manufactured nanomaterials (MNMs) have been developed and used as basic materials of industrial products, and they may pose health risks for workers in not only developed countries but also in developing countries. Few studies have looked at the evidence for effects of controls that mitigate the risk of exposure to MNMs. Therefore, we systematically searched the literature from th...

Methicillin-resistant Staphylococcus aureus (MRSA) was originally recognized as a hospital acquired infection. However, it is now recognized that MRSA infections are frequently acquired in the community and agricultural settings as well. As epidemiological studies and surveillance of MRSA continued over the past decade, agricultural sources of MRSA have also been recognized. Although direct per...

A database of approximately 20,000 chemical exposures has been constructed in close co-operation between the School of Public Health of the University of North Carolina at Chapel Hill and the Department of Air Pollution of the Wageningen Agricultural University. A special feature of this database is that only multiple measurements of exposure from the same workers were included. This enabled es...

UNLABELLED Contamination of working areas by 99mTc DTPA aerosol is of concern to nuclear medicine technologists. This study sought to determine the extent of 99mTc DTPA contamination to technologists, and to localize sources of aerosol leakage so that methods could be identified that would minimize contamination. METHODS Fifty to eighty millicuries 99mTc DTPA, diluted to a volume of 4-5 ml wi...

Exposure to inhalable wood dust and compliance with the British Control of Substances Hazardous to Health (COSHH) Regulations 1999 were assessed at a representative cross-section of the British woodworking industry. Median exposures ranged from 1.5 to 2.8 mg/m(3) across the selected industry groups, the lowest being in sawmilling and planing of wood. Overall, 27% of values exceeded the maximum ...