نتایج جستجو برای: pollutant

تعداد نتایج: 20272  

2015
Motoh Tsujimura

This paper investigates a pollutant abatement investment under ambiguity in a twoperiod setting. We consider there are representative consumer and firm in an economy and formulate the social welfare maximization problem. Then we numerically derive the optimal level of abatement investment. Furthermore, we analyze the comparative static effects of the model’s parameters and find an increase in t...

2010
Ronald K. Hanson David Davidson Xin Zhou

Motivation Fuel lean combustion is often employed to reduce pollutant emissions (CO, NOx,...) and increase gas turbine lifetime via reduced temperature. However, lean combustion is susceptible to thermoacoustic instabilities and lean blowout (LBO). Thermoacoustic instabilities are due to the coupling of heat release to acoustic oscillations, and lead to reduced combustion efficiency and increas...

2017
Perrine Gamain Jérôme Cachot Patrice Gonzalez Hélène Budzinski Pierre-Yves Gourves Bénédicte Morin

Citation: Gamain P, Cachot J, Gonzalez P, Budzinski H, Gourves P-Y and Morin B (2017) Do Temporal and Spatial Parameters or Lifestyle of the Pacific Oyster Crasssostrea gigas Affect Pollutant Bioaccumulation, Offspring Development, and Tolerance to Pollutants? Front. Mar. Sci. 4:58. doi: 10.3389/fmars.2017.00058 Do Temporal and Spatial Parameters or Lifestyle of the Pacific Oyster Crasssostrea ...

2007
Fabian Wagner Markus Amann Wolfgang Schöpp

This document describes the optimization framework of the GAINS model for Europe. The approach is compared to the approach used in the RAINS model and a detailed description of the objective function, the constraints and the impact functions is given. Finally a comparison of individual single pollutant cost curves generated from the RAINS model and with the optimization module of GAINS is given...

2014
Loren H Raun Katherine B Ensor David Persse

BACKGROUND Evidence indicates that asthma attacks can be triggered by exposure to ambient air pollutants, however, detailed pollution information is missing from asthma action plans. Asthma is commonly associated with four criteria pollutants with standards derived by the United States Environmental Protection Agency. Since multiple pollutants trigger attacks and risks depend upon city-specific...

2013
A T. Banerjee R. A. Christian

Three dimensional simulations are carried out to estimate the effect of wind direction, wind speed and geometry on the flow and dispersion of vehicular pollutant in a street canyon. The pollutant sources are motor vehicles passing between the two buildings. Suitable emission factors for petrol and diesel vehicles at varying vehicle speed are used for the estimation of the rate of emission from ...

2009
ASU İNAN LALE BALAS MURAT CETİN Asu Inan Lale Balas Murat Cetin

Antalya Bay is located in the Mediterranean Sea of Turkish coasts. City of Antalya is one of the major tourism cities of Turkey with an increasing population. The sea outfall was constructed in the Antalya Bay. In this study, the currents and wind have been observed and measured. The wave height distribution, current pattern and pollutant concentration have been presented. Wind driven currents ...

2015
B. Dubey J. Hussain S. N. Raw Ranjit Kumar Upadhyay

In this paper, a nonlinear spatial model is proposed and analyzed to study the effect of pollution on biological population. It is assumed that the pollutants enter into the environment not directly by the population but by a precursor produced by the population itself. It is further assumed that larger the population, faster the precursor is produced, and larger the precursor, faster the pollu...

2010
James R. Drummond

Carbon monoxide is a common pollutant in the troposphere. Produced mainly by incomplete combustion and industrial activity, it has a concentration within the (normal) range of ~50-200ppbv throughout the troposphere. The major sink is its reaction with the hydroxyl (OH) radical. The lifetime of CO is ~20-30days in the troposphere. The fairly long lifetime and the reaction with OH makes CO an int...

2006
William A. Brock Stephen R. Carpenter

Many environmental conflicts involve pollutants such as greenhouse gas emissions that are dispersed through space and cause losses of ecosystem services. As pollutant emissions rise in one place, a spatial cascade of declining ecosystem services can spread across a larger landscape because of the dispersion of the pollutant. This paper considers the problem of anticipating such spatial regime s...

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