This paper describes the results of an ultrawideband (UWB) propagation study in which arrays of propagation measurements were made. After a description of the propagation measurement technique, an approach to the spatial and temporal decomposition of an array of measurements into wavefronts impinging on the receiving array is presented. Based on a modification of the CLEAN algorithm, this appro...

The majority of waste plastics currently produced are either landfilled or incinerated. Plastics do not readily degrade and toxic elements can be leached from the landfill. Combustion of waste plastics can generate environmentally hazardous air pollutants such as dioxins/furans, as well as undesirable carbon dioxide. Consequently, cost effective ways of recycling the increasing amounts of gener...

The 491 U.S. coal-fired power plants are the largest unregulated industrial source of mercury emissions nationwide, annually emitting about 48 tons of mercury—a toxic element that poses health threats, including neurological disorders in children. In 2000, the Environmental Protection Agency (EPA) determined that mercury emissions from these sources should be regulated, but the agency has not s...

many modern analytical methods deal with the trace-level determination of compounds of interest in highly complex environmental samples by means of chromatographic techniques. the introduction of a “clean” sample into an analytical instrument can make analyses easier and prolongs the equipment life. the use of solid-phase extraction (spe) has grown and is a fertile technique of sample preparati...

Using four times as much coal in 2050 for electricity production need not degrade air quality or increase greenhouse gas emissions. Current SOx and NOx emissions from the power sector could be reduced from 12 to less than 1 and from 5 to 2 million tons annually, respectively, using advanced technology. While direct CO2 emissions from new power plants could be reduced by over 87%, life cycle emi...

An ultra-fast analytical protocol using graphene-based solid-phase extraction coupled with ultra-performance liquid chromatography-tandem mass spectrometry for the rapid determination of malachite green and its metabolite, leucomalachite green in fish tissues has been developed. In the present work, graphene was synthesized and evaluated as novel solid-phase extraction sorbents for the analytes...

From an environmental perspective, electricity grid interconnections in Northeast Asia make sense. Cities in Northeast China, Mongolia, the Democratic People’s Republic of Korea (DPRK), and the Republic of Korea (ROK) suffer from poor air quality due to the extensive use of coal-fired power generation. Rural communities suffer from a deficit of electricity, forcing reliance on coal and biofuels...

Nowadays for power generation, environment is a major consideration. The heart of power generation is power station. At present there are almost above 40(Both Government & Rental) power station in Bangladesh. Among these 80% of power station is gas based. Rest of the 20% is coal, liquid and furnace oil based. Bangladesh has only one Hydraulic power station. These gas and coal based power statio...

1 Executive Summary Coal-based generation appears likely to remain the linchpin of the Indian power sector at least for the next few decades, given the large domestic coal resources and the absence of any other significant domestic energy sources in the country. Coal power will, thus, help increase the availability of electricity, particularly in rural areas, which is an urgent development prio...

Rachel Golden is a graduate student in the Energy and Resources Group and the Goldman School of Public Policy at University of California, Berkeley. At UC Berkeley, she has served as a student researcher on multiple energy policy issues at the California Governor’s Office, California Public Utilities Commission, California Energy Commission, U.S. Environmental Protection Agency Region 9, and Na...