Publications

2014
Al-Azzam DO, Mekni DM, Sarsar D, Seifu K. Flood prediction and risk assessment using advanced geo-visualization and data mining techniques. World Scientific and Engineering Academy and Society | APPLIED COMPUTATIONAL SCIENCE. 2014;20. Publisher's VersionAbstract

Throughout the last century, flooding has been one of the most costly natural disasters concerning of human casualties, property damage, and environment degradations. Flooding is a complex natural phenomenon which is highly constrained by the geospatial environment where it evolves. The need for flood prediction and risk assessment is increasing, and decision makers still lack intelligent tools to study flooding. Artificial intelligence and knowledge discovery advances offer approaches for the modeling and simulation of such complex phenomena. To this extent, we propose to build a computer simulation platform to support flood prediction and risk assessment using advanced geo-visualization and data mining techniques. The outcomes and results of our simulations aim to better manage floods through prevention, protection, and emergency response perspectives.

2008
Seifu K. Communication Satellites: Frequency Bands Limitations vs Implementations Law DCT. he College of Information Sciences and Technology at The Pennsylvania State University. 2008. Publisher's VersionAbstract

The role of communications satellites in the national and global information infrastructure is diverse. Communications satellites utilize electromagnetic spectrum to transmit information. The material in this project is involved in studying the application of telecommunication devices for various frequency ranges, such as L-band, C-band, Kuband, Ka-band, etc. in implementing the emerging frequency band of Ka-band, a broadband with approximate width of 18 – 40 Giga hertz. This broadband is now becoming a big issue because the lower frequency bandwidth between 12-18 Giga hertz named Ku-band will be occupied by larger telecommunication service providers filling up the band while various factors such as rain attenuation, antenna wetting, depolarization due to rain and ice, cloud attenuation etc. still affect significantly high frequency propagation. As the traffic of the Ku-band and other lower band spectra are highly congested, regulatory organizations encounter problems in reallocating services to other frequencies. If reallocations of frequency are to be sought to certain bandwidth, it would result a loss of billions of dollars per year to previously mounted communications satellites which transport various signals. Hence, this paper shall explore the new technologies and concepts in implementing wireless devices that have potential in alleviating traffic congestion of communication satellites.