As a typical CSMA is a contention-based channel access protocol, channels are not always occupied and there can exist wasted time, called space holes, in wireless channels depending on the system of interest.
Microbial fuel cells (MFC) are considered as the futuristic energy device that generates electricity from the catalytic degradation of biodegradable organic wastes using microbes, which exist in waste water.
Taking advantage of the microwave absorption capabilities of the barium ferrite powders and filling materials that exist in waste rubber, both the semi-devulcanization of the waste rubber powder and surface modification of barium ferrite powder have been simultaneously achieved under microwave irradiation.
"Critics go gentle on Allen's later work, which very often needn't exist and waste talent that even if it wasn't doing better work elsewhere, could be resting".
The antibiotics that exist in waste streams directly inhibit substrate degradation and also have an influence on the composition of the microbial community.
Inequality (1m) does not consider the situation that there may exist a waste of resources (i.e. that the resources are extracted but not actually used in production).
This result demonstrates that at the aggregate level, a greater potential for progress exists for waste gas reduction than for wastewater treatment.
Sufficient biomass exists as waste from forestry operations alone to meet all of the 21 billion gallons of cellulosic fuels mandate established in the 2007 energy bill.
Copper waste contamination exists in aqueous waste from copper mining, electronic and electrical industries, industries involved in the manufacture of computer heat sinks, excessive use of Cu-based agro-chemicals, ceramic glazing and glass colouring, etc.
A Kuznets inverted "U" curve relationship existed between domestic waste generation and people's income in rural areas of China.
