article thumbnail

California ARB study finds commuters’ exposures to air pollution greatly depends on mode of travel; light rail, personal vehicles the lowest

Green Car Congress

The study, published recently in Atmospheric Environment , investigated commuter exposure to PM 2.5 , black carbon (BC), and ultrafine particles (UFP) in six common transport microenvironments in Sacramento, California. One important finding is the need for more light rail and dedicated bike paths, as well as cleaner locomotives.

Pollution 150
article thumbnail

Opinion: Reinventing fuel-based power for a more secure and resilient grid

Green Car Congress

It is argued, therefore, that with this power potential, we can create enough excess in wind and solar power that the statistical likelihood of not having the power supply to match demand is effectively zero. European Environment Agency, 2009. [ Dr Toby Gill, CEO of Intelligent Power Generation. Earlier post.). 2 ] Swart, R.

Grid 332
article thumbnail

The Engineer Behind Samsung’s Speech Recognition Software

Cars That Think

They include the power-normalized cepstral coefficients , which improve the accuracy of speech recognition in environments with disturbances such as additive noise, changes in the signal, multiple speakers, and reverberation. It suppresses the effects of background noise by using statistics to estimate characteristics.

Engine 114
article thumbnail

Study finds some improved cookstoves may emit more black carbon pollution than traditional mud cookstoves

Green Car Congress

In this plot, a red star under the boxes means that the mean values for hardwood and mixed fuel tests are statistically different for that stove technology class (at the 95% confidence level, p. They did the test in real homes as part of Project Surya, which quantifies the impacts of cleaner cooking technologies in a village in India.

Pollution 231
article thumbnail

ICCT analysis finds real-world vehicle fuel consumption gap in Europe at all-time high of 42%

Green Car Congress

This update, jointly prepared by the ICCT and the Netherlands’ Organization for Applied Scientific Research (TNO), describes the increasing real-world efficiency gap using statistical analysis. Manufacturers measure vehicle fuel consumption in a controlled laboratory environment. We analyzed data for more than 1.1

Europe 170
article thumbnail

ICCT/TNO study: Real-world vehicle fuel consumption discrepancy widens to 42% in Europe

Green Car Congress

The new study, jointly prepared by the ICCT and the Netherlands’ Organisation for Applied Scientific Research (TNO), describes the increasing real-world efficiency gap using systematic statistical analysis. United Kingdom), km77.com com (Spain); and the car club TCS (Switzerland). Source: The ICCT. Click to enlarge.

Europe 150
article thumbnail

Measurements of CO2 and CO in China’s Air Indicate Sharply Improved Combustion Efficiency

Green Car Congress

The findings, published in the 21 September issue of Atmospheric Chemistry and Physics , are generally consistent with official Chinese government statistics and could bolster their credibility as international negotiations proceed on commitments of China and other nations to combat climate change.

CO2 199