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Efficient enhancement of the accuracy of ray tracing
, Article 2010 IEEE International Symposium on Antennas and Propagation and CNC-USNC/URSI Radio Science Meeting - Leading the Wave, AP-S/URSI 2010, 11 July 2010 through 17 July 2010 ; July , 2010 ; 9781424449682 (ISBN) ; Parsa, S ; Shishegar, A. A ; Sharif University of Technology
2010
Abstract
Proper design of wireless personal and local area networks requires accurate characterization of radio wave propagation in indoor environments. The Shooting-and-Bouncing-Ray tracing (SBR) method, which uses Geometrical Optics (GO) approximation, has been widely used for indoor propagation modeling [1-2]
Hydraulic performance of labyrinth side weirs using vanes or piles
, Article Proceedings of the Institution of Civil Engineers: Water Management ; Volume 164, Issue 5 , 2011 , Pages 229-241 ; 17417589 (ISSN) ; Borghei, S. M ; Esmaili, H ; Sharif University of Technology
Abstract
In the present study, methods for improving the hydraulic performance of labyrinth side weirs in a rectangular channel are reported based on model experimentation. For this purpose different arrangements and configurations of groups of guide vane plates and piles in the side weir flow field were tested. Experiments were conducted on labyrinth side weirs of different lengths and sill heights fitted in the test section of a rectangular glass-walled channel. Depths of flow were measured in both longitudinal and crosswise directions at regular intervals and their profiles were studied. It was found that the discharge coefficient of the labyrinth side weirs under these conditions gave...
Effects of solar energy on the mechanical properties of tailings in tailings dams
, Article GeoCongress 2008: Characterization, Monitoring, and Modeling of GeoSystems, New Orleans, LA, 9 March 2008 through 12 March 2008 ; Issue 179 , 2008 , Pages 605-612 ; 08950563 (ISSN); 9780784409725 (ISBN) ; Pak, A ; Sharif University of Technology
2008
Abstract
Mine tailings are the most common materials that are used in construction of tailings dams. Due to high level of environmental hazard and serious consequences that are associated with tailings dam failure, proper design of tailings dams is an important factor in mining industry. Water level fluctuation, change in permeability of dam foundation, seismic loads, and excessive settlements are the most common reasons of failure, particularly in upstream type tailings dams. Due to low shear strength of wet tailings, drying of tailing material is very common in practice during the dam construction. In hot climate, the received solar energy at the soil surface converts to soil heat flux, air heat...