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Full-Text Articles in Engineering
Authentication Based On Blockchain, Norah Alilwit
Authentication Based On Blockchain, Norah Alilwit
Doctoral Dissertations and Master's Theses
Across past decade online services have enabled individuals and organizations to perform different types of transactions such as banking, government transactions etc. The online services have also enabled more developments of applications, at cheap cost with elastic and scalable, fault tolerant system. These online services are offered by services providers which are use authentication, authorization and accounting framework based on client-server model. Though this model has been used over decades, study shows it is vulnerable to different hacks and it is also inconvenient to use for the end users. In addition, the services provider has total control over user data …
Drones Detection Using Smart Sensors, Aishah Moafa
Drones Detection Using Smart Sensors, Aishah Moafa
Doctoral Dissertations and Master's Theses
Drones are modern and sophisticated technology that have been used in numerous fields. Nowadays, many countries use them in exploration, reconnaissance operations, and espionage in military operations. Drones also have many uses that are not limited to only daily life. For example, drones are used for home delivery, safety monitoring, and others. However, the use of drones is a double-edged sword. Drones can be used for positive purposes to improve the quality of human lives, but they can also be used for criminal purposes and other detrimental purposes. In fact, many countries have been attacked by terrorists using smart drones. …
Theoretical And Computational Analyses On Transition And Turbulence In Purely Oscillating Pipe Flow, Ali Ahmed Abdulrasool
Theoretical And Computational Analyses On Transition And Turbulence In Purely Oscillating Pipe Flow, Ali Ahmed Abdulrasool
Doctoral Dissertations and Master's Theses
The hydrodynamic instability of purely oscillating pipe flows is investigated in terms of the quasi-steady formulation assuming the temporal changes of the laminar base flow relative to disturbances are slow. A simple model equation is introduced to compare the exact solution of the current approach with those of the major theories dedicated for unsteady flows. The results of the analysis show that the quasi-steady assumption and the multiple scales method are more efficient and accurate than the formal Floquet theory in predicting the transient instabilities within a period in addition to the long-term growth or decay of disturbances. The most …