Water is the source of human life. However, a large amount domestic sewage, industrial wastewater and agricultural produced in production life pollute surface water, threatening normal people.In order to grasp water quality fully, temperature, PH. turbidity conductivity sensors are adopted collect various parameters, necessary software hardware design on-line quality' monitoring system complete...

Emissions trading, also known as cap-and-trade systems, has not yet fulfilled its function of mitigating overall global greenhouse gas (GHG) emissions. The reasons for this failure are manifold and have been broadly discussed at political empirical levels in the last decades. However, much can still be said from a philosophical perspective. Such an analysis is limited to evaluation systems’ lac...

1. Urban drainage systems fal into two categories: “separated” systems where stormwater and sewage is reticulated in separate reticulation systems; and “combined” systems where the same pipes are used for both. The report deals exclusively with the urban litter problems associated with the stormwater conduits and streams in a country where the stormwater and sewage are always (theoretically at ...

If a coalition of countries implements climate policies, nonparticipants tend to consume more, pollute more, and invest too little in renewable energy sources. In response, the coalition’s equilibrium policy distorts trade and it is not time consistent. By adding a market for the right to exploit fossil fuel deposits, I show that these problems vanish and the …rst best is implemented. When the ...

Submarine outfalls are proposed as an efficient alternative for the final destination of wastewater in densely populated coastal areas, due to the high dispersal capacity and the clearance of organic matter in the marine environment, and because they require small areas for implementation. This paper evaluates the probability of unsuitable bathing conditions in coastal areas nearby to the Ipane...

This survey paper examines the problem of achieving global cooperation to reduce greenhouse gas emissions. Contributions to this problem are reviewed from non-cooperative game theory, cooperative game theory, and implementation theory. Solutions to games where players have a continuous choice about how much to pollute, games where players make decisions about treaty participation, and games whe...

A good enamel cleaning before acid etching is necessary to prepare esthetic and functional direct and indirect restorations and fissure sealants [1,2]. Plaque and discolorations are removed by dental prophylaxis technique with pumice powder or paste and rotating brush or small rubber cup [3], there are other techniques like air-flow and bicarbonate jet polisher, which are as operative as the ot...

Artificial viscosity can be combined with a higher-order discontinuous Galerkin finite element discretization to resolve a shock layer within a single cell. However, when a non-smooth artificial viscosity model is employed with an otherwise higherorder approximation, element-to-element variations induce oscillations in state gradients and pollute the downstream flow. To alleviate these difficul...

The management of dynamic workflows needs adequate formal models and support tools to handle in a safe way changes occurring during workflow operation. A common approach is to pollute models with details that do not regard the workflow behavior, rather its evolution. That hampers analysis, reuse and maintenance in general. We propose and discuss the adoption of a recent Petri net-based reflecti...