Electronic and Communication - Engineering

Abstract:This research intent to enhance and design an electrical power subsystem for a communications satellite in the geosynchronous orbit for a life time mission of 7-10 years. Among many types of the well known electrical power subsystems used for satellites and spacecraft, the solar array system is used to provide the satellite power requirements. The solar arrays are used to provide power to the satellite during all mission life time, while the batteries are being used to supply power to the satellite during the eclipse when there is no available power from the solar arrays.

Abstract: Steganography is the art of information hiding in ways that prevent its detection. A message in cipher text may raise suspision, while an invisible message will not. Digital steganography uses a host data or message, known as a ''container'' or ''cover'' to hide another data or message called ''secret'' in it. An Image in audio steganography system had been proposed in this thesis in order to embed a secret image data in audio data. One embedding method is implemented in the proposed system (Least Significant Bit in time domain, and transform domain Discrete Wavelet Transform).

Abstract: The designing of blood glucose instrument needs to have a sensor that has a high sensitivity to variation in glucose level in blood, the instruments were designed and developed through years to implement a high accuracy and a harmless instruments that could be used by the patient without difficulties and gives a good reading for the amount of glucose concentration in blood. This work gives a new design for blood glucose instrument that depends in its work on the electrical properties of blood.