Three-dimensional surface geometry of rock discontinuities and its evolution with shearing are of great importance in understanding the deformability and hydro-mechanical behavior of rock masses. In the present research, surfaces of three natural rock fractures were digitized and studied before and after the direct shear test. The variography analysis of the surfaces indicated a strong non-line...

OBJECTIVES To evaluate the efficacy of osteosynthesis on femoral neck fractures using two instead of three screws. METHODS Thirty-nine fractures were retrospectively evaluated, divided into groups in which two screws were used in parallel (n = 28) or three screws (n =11) in an inverted triangle configuration (in accordance with the AO technique). The patients were then followed up until reach...

In this paper a novel configuration for multichannel teleconferencing with multi spatial region acoustic echo cancellation is developed. In the proposed configuration, the transmission and receiving rooms are divided into equivalent number of spatial regions and adaptive filters are attached to each spatial region for the purpose of echo cancellation. This multi spatial region acoustic echo can...

Electroencephalography (EEG) serves as an effective diagnostic tool for mental disorders and neurological abnormalities. Enhanced analysis classification of EEG signals can help improve performance in classifying the A new approach is examined here enhancing using a novel model data representation that leverages knowledge spatial layout sensors. An investigation proposed provides evidence consi...