Prediction of hourly ozone concentrations with multiple regression and multilayer perceptron models

In this work ozone observations of an urban area of the east coast of the Iberian Peninsula, are analyzed. The data set contains measurements from five automatic air pollution monitoring stations (background suburban or traffic urban). The application of multiple linear regression and neural networks models is considered. These models forecast hourly ozone levels for short-term prediction intervals (1, 8, and 24 h in advance). The study period is 2010 2012. The input variables are meteorological observations, ozone and nitrogen oxides concentrations, and daily and weekly seasonal cycles. The performance criteria to evaluate the computations accuracy are the residual mean square error, the mean absolute error, and the correlation coefficient between observations and predictions. These criteria have better results for the 1-h and 24-h predictions in all the locations. The comparison of multiple linear regressions and multilayer perceptron networks indicates that the second approach allows to obtain more accurate forecast for the three prediction intervals.Capilla, C. (2016). Prediction of hourly ozone concentrations with multiple regression and multilayer perceptron models. International Journal of Sustainable Development and Planning. 11(4):558-565. doi:10.2495/SDP-V11-N4-558-565S55856511

Urban Transport XVIII:Urban transport and the environment in the 21st century

This book contains the seventeenth proceedings of the annually held international conference on Urban Transport and the Environment.The continuing requirements for better urban transport systems in general and the need for a healthier environment haves led to an increased level of research around the world. This is reflected in the proceedings of this well-established meeting which demonstrates the steady growth of research into urban transport systems. The variety of topics covered by the conference is of primary importance for analysing the complex interactions of the urban transport environment and for establishing action strategies for transport and traffic problems.The topics covered in this book include: Environmental impact; Environmentally friendly transport modes; Public transport systems; Transport modelling and simulation; Urban transport management; Transport safety and security; Infrastructure; Land use and transport integration

Analysis of size spectra off northwest Africa: a useful indicator in tropical areas?

Changes in the size spectra of demersal fish communities off Cape Verde (1988, 1994), Guinea (1985-1995), and Mauritania (1987-2001) were studied. Intercepts and slopes showed opposite trends for Guinea and Mauritania, but were relatively stable in spite of a strong increase in landings per unit area. For Cape Verde, there were marked changes in size structure, seemingly inconsistent with the more moderate fishing pressure there. Changes in size structure do not seem to be suitable indicators of the effects of fishing in areas characterized by faster growth rates, small sizes, high species diversity, and complex interrelationships, such as the tropics. (c) 2005 International Council for the Exploration of the Sea. Published by Elsevier Ltd. All rights reserved

Thigh-length compression stockings and DVT after stroke

Controversy exists as to whether neoadjuvant chemotherapy improves survival in patients with invasive bladder cancer, despite randomised controlled trials of more than 3000 patients. We undertook a systematic review and meta-analysis to assess the effect of such treatment on survival in patients with this disease