Ahmed Naguib

A wide-range direct digital frequency synthesizer (DDS) is considered an essential component that is used in measuring electrochemical impedance spectroscopy (EIS). Since it depends on exciting the electrochemical sensor by a pure sine wave, total harmonic distortion (THD) is considered a challenging specification for an accurate EIS measurement. This paper introduces a complete system and circuit designs of a wide range DDS with a comprehensive system model using MATLAB environment.

The last six weeks have been challenging as an educator and someone serving my community through how I sustain my living. Seeing the pain and suffering live on our devices daily can make someone question why they even keep showing up to work. We are watching live how colonial and imperial regimes still work the same systems, tricks, and angles. Meanwhile, our tools have changed, and their systems are crumbling. This means we have been exposed to a brutally overwhelming amount of truth.

Abstract : The decline curve analysis (DCA) technique is the simplest, fastest, least computationally demanding, and least data-required reservoir forecasting method. Assuming that the decline rate of the initial production data will continue in the future, the estimated ultimate recovery (EUR) can be determined at the end of the well/reservoir lifetime based on the declining mode.