the outcomes of development of urbanization as pollution of air, water and urban environment are great threats to the health and safety of urban residents. nowadays, urban areas as centers of population and economic activities show high concentrations of pollutants; so that, inconvenient locations of irksome and pollutant jobs in metropolitans such as isfahan city have led to serious threats to...

With the aim of energy management in a wireless sensor network established in a closed space container, this paper introduces a way to decrease the total power consumption due to measuring and transmitting data in a few desired sensor nodes (DSNs). The DSNs either will be turned to sleeping mode for reducing battery-consumption or even they may be inactive due to the energy depletion. We estima...

A uniquely designed mechanically rechargeable all-solid-state carbon-air battery stack, with extremely high specific energy and power density, shows great promise for applications in portable supplies small stations. • unique performance battery. The based on long electrolyte tube has anode inside cathode outside. Current from is efficiently collected through holes along tube. Battery stack for...

Rechargeable metal-air batteries are considered a promising energy storage solution owing to their high theoretical energy density. The major obstacles to realising this technology include the slow kinetics of oxygen reduction and evolution on the cathode (air electrode) upon battery discharging and charging, respectively. Here, we report non-precious metal oxide catalysts based on spinel-type ...

Over the last 20 years, the Kirk R. Smith research group at the University of California Berkeley-in collaboration with Electronically Monitored Ecosystems, Berkeley Air Monitoring Group, and other academic institutions-has developed a suite of relatively inexpensive, rugged, battery-operated, microchip-based devices to quantify parameters related to household air pollution. These devices inclu...

Several indexing techniques for data broadcast on the air have been proposed for power conservation on mobile computers in the past few years. Indexing techniques for broadcast channels can save battery power (estimated by tune-in time) while incurring only limited overhead on access time. In this paper, we compare indexing techniques based on the index tree and the signature methods and find t...

The AeroEclipse® BAN (Trudell Medical International (TMI), London, Canada) was initially developed for use in the hospital environment, optimized for medication delivery using air or oxygen supplied at 50 psig pressure (2, 3). This article describes initial laboratory data with a version (AeroEclipse-XL®) optimized for operation by either table-top (OmbraTM table-top compressor, TMI, 230V AC ve...