A gas-phase oxidation method using dielectric barrier discharges (DBDs) has been developed to remove S02 and to simultaneously remove SO, and NO from gas streams that are similar to gas streams generated by the combustion of fossil fuels. SO, and NO removal efficiencies are evaluated as a function of applied voltage, temperature, and concentrations of S02, NO, t'l,O~s), and N H 3. With constant...

Oxidative scrubbing is used to remove H2S from gas streams. A key problem in regeneration of the absorbent is the removal of fine particles of sulphur from the suspension of the scrubbing liquid. Dispersions of ultra-fine bubbles have been called "colloidal gas aphrons" or aphrons for short. These dispersions have interesting properties and it was found that they have particular advantages in t...

Continuous queries over data streams have gained popularity as the breadth of possible applications, ranging from network monitoring to online pattern discovery, have increased. Joining of streams is a fundamental issue that must be resolved to enable complex queries over multiple streams. However, as streams can represent potentially infinite data, it is infeasible to have full join evaluation...

Degradation of warmwater streams in agricultural landscapes is a pervasive problem, and reports of restoration effectiveness based on monitoring data are rare. Described is the outcome of rehabilitation of two deeply incised, unstable sand-and-gravel-bed streams. Channel networks of both watersheds were treated using standard erosion control measures, and aquatic habitats within 1-km-long reach...

XML streams are online, continuous, distributed, high throughput sources of information. For streams carrying a significant intellectual and/or industrial value, proving ownership over pirated copies is a requirement for data producers. Watermarking is a known technique for hiding a copyright mark in a digital document, in a resilient manner. While such methods already exist for numerical strea...