Introduction: The gamma cameras, based on scintillation crystal followed by an array of photomultiplier tubes (PMTs), play a crucial role in nuclear medicine. The use of square PMTs provides the minimum dead zones in the camera. The camera with square PMTs also reduces the number of PMTs relative to the detection area. Introduction of a positioning algorithm to improve the spat...

To date, a number of numerical methods, including the popular Finite-Difference Time Domain (FDTD) technique, have been proposed to simulate Ground-Penetrating Radar (GPR) responses. Despite having a number of advantages, the finite-difference method also has pitfalls such as being very time consuming in simulating the most common case of media with high dielectric permittivity, causing the for...

http://www.kfupm.edu.sa Warped ARMA Filters In High Quality Audio Coding Deriche, M. Ning, D.; Dept. of Electr. Eng., King Fahd Univ. of Pet. & Miner., Dhahran, Saudi Arabia; Signal Processing and Its Applications, 2003. Proceedings. Seventh International Symposium on;Publication Date: 1-4 July 2003;Vol: 2,On page(s): 153156 vol.2;ISBN: 0-7803-7946-2 King Fahd University of Petroleum & Minerals

Seismic waves are non-stationary due to its propagation through the earth. Time-frequency transforms are suitable tools for analyzing non-stationary seismic signals. Spectral decomposition can reveal the non-stationary characteristics which cannot be easily observed in the time or frequency representation alone. Various types of spectral decomposition methods have been introduced by some resear...

Satellite radar altimeter observations are key to advanced studies in ocean dynamics, particularly those focusing on mesoscale processes. To resolve scales below about 100 km, because measurements often characterized by a low signal-to-noise ratio (SNR), low-pass filtering or least-squares curve fitting is generally applied smooth the data before analysis. Here, we present an alternative method...