An understanding of flow and dispersion in the human respiratory airways is necessary to assess the toxicological impact of inhaled particulate matter as well as to optimize the design of inhalable pharmaceutical aerosols and their delivery systems. Secondary flows affect dispersion in the lung by mixing solute in the lumen cross section. The goal of this study is to measure and interpret these...

Particulate matter represents a serious hazard to human health, and air quality models contribute the understanding of its dispersion. This study describes particulate with ≤10 μm diameter (PM10) dynamics in an urban–industrial area, through comparison three datasets: modeled (TAPM—The Air Pollution Model), measured concentration (environmental control stations—ECS), leaf deposition values. Res...

The term, biosolids, is generally used to refer to those waste products that have been stabilized by treatment of the sewage sludge for beneficial reuse through appropriate management (Davis, 2002). The agronomic and environmental benefits from the organic material and fertilizing elements contained in the biosolids are essential for maintaining soil fertility. This has been a major reason for ...

In many industrialized areas, the highest concentration of particulate matter, as a major concern on public health, is being felt worldwide problem. Since the air pollution assessment and its evaluation with considering spatial dispersion analysis because of various factors are complex, in this paper, GIS-based modeling approach was utilized to zoning PM2.5 dispersion over Tehran, du...

Experimental approaches in concrete technology are time-consuming, laborious and thus expensive. Developments in computer facilities render possible nowadays realistically simulating the particulate structure and microstructure of cementitious materials. For that purpose, discrete element methods (DEM) are required because of more correctly simulating particle dispersion. Dynamic DEMs like Delf...

In a previous work, we proposed an informed Non-negative Matrix Factorization (NMF) with a specific parametrization which involves constraints about some known components of the factorization. In this paper we extend the above work by adding some information provided by a physical dispersion model. In particular, we derive a special structure of one of the factorizing matrices, which provides a...

A pivotal element for metropolitan planning and an essential component describing the urban design is block typology, affecting pollution concentration. Consequently, this research examines influence of various typologies on pollutant distribution. Four are simulated by ENVI-MET software. These cubic-shaped, L-shaped, C-shaped, linear-shaped models. Urban air quality was assessed using relative...