today, the cement industry is one of the major air polluting industries in the world. hence, in this study, owing to the importance and role of contaminants from the plant, an appraisal of the emission contributions in addition to other factors have been discussed. there are several reasons behind the importance of modeling air pollutants. first, the assessment of standards for air pollution, a...

We present the first comparisons of a newly developed Galactic Structure and Kinematic Model to magnitude and color counts, as well as relative proper motions, in the fields of the open clusters NGC 188 ((l, b) = (122.8 o , +22.4 o)) and NGC 3680 ((l, b) = (286.8 o , +16.9 o)). In addition to determining the reddening toward these two clusters, it is shown that starcounts at intermediate Galact...

Airborne volcanic ash advisories are currently based on analyses of satellite imagery with relatively low temporal resolution, and numerical simulations of atmospheric plume dispersion. These simulations rely on key input parameters such as the maximum height of eruption plumes and the mass eruption rate at the vent, which remain loosely constrained. In this study, we present a proof-of-concept...

Optical rotatory dispersion and circular dichroism spectra of the Pseudomonas blue protein and lactase B from Polyporus versicolor are presented from 190 to 700 mp. Circular dichroism spectra of both proteins show six ellipticity bands above 300 rnp associated with the copper chromophore, indicating more transitions to be present in these copper protein complexes than the three parity-forbidden...

Individual based, stochastic forest patch models have the potential to realistically describe forest dynamics. However, they are mathematically intransparent and need long computing times. We simplified such a forest patch model by aggregating the individual trees on many patches to height-structured tree populations with theoretical random dispersions over the whole simulated forest area. The ...

Based on a global kinetics of direct dimethyl ether (DME) synthesis process from syngas, a steady-state one-dimensional mathematical model for the bubble column slurry reactor (BCSR) has been established. It was built on the assumption of plug flow of gas phase, sedimentation-dispersion model of catalyst grains and isothermal chamber regardless of reaction heats and rates for the design of an i...

Article history: Received 7 April 2011 Received in revised form 17 September 2011 Accepted 18 September 2011 Is wind direction an adequate marker of air mass history? This review looks at the evolution of methods for assessing the effect of the origin and pathway of air masses on composition change and trends. The composition of air masses and how they evolve and the changing contribution of so...

The surface of the ocean, and so such quantities as the significant wave height, Hs, can be thought of as a random surface that develops over time. In this paper, we explore certain types of random fields in space and time, with and without dynamics that may or may not be driven by a physical law, as models for the significant wave height. Reanalysis data is used to estimate the sea-state motio...

AlGaN/GaN high electron mobility transistors (HEMTs) with Si and Al2O3 substrates reveals anomalies on Ids–Vds–T and Igs–Vgs–T characteristics (degradation in drain current, kink effect, barrier height fluctuations, etc.). Stress and random telegraph signal (RTS) measurements prove the presence of trap centers responsible for drain current degradation. An explanation of the trapping mechanism r...

The tracer gas method is one of the common ways to evaluate air exchange rate in a naturally ventilated barn. One crucial condition for accuracy that both considered gases (pollutant and tracer) are perfectly mixed at points where measurements done. In present study, by means computational fluids dynamics (CFD), mixing ratio NH3/CO2 evaluated inside barn order assess under which flow conditions...