Direct use of atmospheric CO2 as a C1 source to synthesize high-value chemicals through environmentally benign processes is of great interest, yet challenging. Porous heterogeneous catalysts that are capable of simultaneously capturing and converting CO2 are promising candidates for such applications. Herein, a family of organic ionic polymers with nanoporous structure, large surface area, stro...

Results from diagnostic analyses to understand the seasonal evolution of the large-scale climatic state responsible for the development and melt of the winter snowpack, and spring–early summer precipitation in the Churchill Falls region on the QuébecLabrador Peninsula, Canada, are presented in the context of the development of an empirical model for seasonal to annual streamflow forecasting, wi...

Surface temperature and emissivities, as well as atmospheric water vapor and cloud liquid water, have been calculated from Special Sensor Microwave Imager observations for snow-covered land areas using a neural network inversion scheme that includes first-guess information. A learning database to train the neural network is derived from a global collection of coincident surface and atmospheric ...

The mean annual moisture flux across 60øS is estimated using results of numerical analyses produced by the U.S. National Centers for Environmental Prediction a d the European Centre for Medium-Range W ather Forecasts for the 7-year period 1985-1991. The atmospheric data indicate a net poleward transport of 17.06 kg m -1 s -1 or 10.74 Tt yr -1. The mean annual moisture transport divergence for t...

The contribution of atmospheric deposition to emissions of trace metals in stormwater runoff was investigated by quantifying wet and dry deposition fluxes and stormwater discharges within a small, highly impervious urban catchment in Los Angeles. At the beginning of the dry season in spring 2003, dry deposition measurements of chromium, copper, lead, nickel, and zinc were made monthly for 1 yea...

Data assimilation has long being regarded primarily as a mean of providing initial conditions for Numerical Weather Prediction NWP in meteorological centers Increas ingly it is now being recognized that through the constant confrontation of theory under the form of a numerical model that discretized the physical laws governing the atmospheric ow with reality as depicted by meteorological observ...

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The universal principle that an open system can be driven to a state far from equilibrium, or organized, by strong negative entropy flow from its surroundings has been validated in numerous fields from physics and chemistry to the life science. In this paper, entropy flows for a severe storm are calculated via the entropy flow formula using the National Centers for Environmental Prediction/Nati...

Whereas the positive equilibrium of a mass-action system with deficiency zero is always globally stable, for deficiency-one networks there are many different scenarios, mainly involving oscillatory behaviour. We present several examples, centers or multiple limit cycles.

Despite the fact that HIV epidemic is mainly driven by injection drug use in Iran, partners of People Who Inject Drugs (PWID) have been seriously neglected in terms of effective preventive interventions. Currently, sexual partners of PWID might have access to some harm reduction services at Voluntary Counselling and Testing (VCT) centers; however, their needs have not been effectively targeted ...