Thursday, September 20 Session O 16.10 - 17.30 Session O1 Room R1 CAD III Chair: S. Grigoras ANG1/P105 C. Papadopoulos & S. Ginis Finite element structural-acoustic implementation for the prediction of transmission loss of simple and complex structures in the low frequency range ANG1/P098 C. Provatidis Stress analysis of 3D solid structures using large boundary elements derived from 2D-Coons' interpolation ANG1/P010 S. Grigoras & C. Stirbu       Functional aspects of a thread joint for tubing and casing ANG1/P109 Ch. Spitas & T. Costopoulos A new theory for the determination of the actual characteristics of loaded spur gears in mesh ANG1/P099 C. Provatidis Acoustic analysis of two-dimensional mufflers using large finite elements derived from Coons' interpolation Session O2 Room R2 Environmental Protection II Chair: T. Hortis ANG1/P017 P. Maroudas & P. Drakatos Relations between human kind and natural environment (historical-philosophical examination of the ecological problem) ANG1/P066 I. Kalavrouziotis, T. Hortis & P. Drakatos Discretional applications of traded wastewaters in cultivated soils ANG1/P067 I. Kalavrouziotis, T. Hortis, P. Drakatos & S. Varnavas Heavy metal toxicity limits in plants and soils for safe wastewater reuse ANG1/P161 D. Margaris, A Filios, M Vrachopoulos & D. Papanikas Airflow thermal and pollutant concentration fields in street canyons