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Articles 91 - 92 of 92
Full-Text Articles in Engineering
Study Of Steganalysis Methods, Wen Chen
Study Of Steganalysis Methods, Wen Chen
Theses
Steganography is the art and science of hiding the presence of conmunication by embedding secret message into digital images. The steganographic techniques can be applied in many areas. On one hand, people can benefit from their application. For example, they can be used for copyright protection. On the other hand, these techniques may be used by criminals or terrorists for malicious purposes. For example, terrorists may use the techniques to transmit the secret plan of terror attacks. Law enforcement and security authorities have concerns about such activities. It is necessary to devise the methods to detect steganographic systems. The detection …
Heat Transfer Model For The Ignition Of Metal Powder On A Heated Filament, Trent Stanton Ward
Heat Transfer Model For The Ignition Of Metal Powder On A Heated Filament, Trent Stanton Ward
Theses
The thermal processes leading to ignition of metal powders in environments that experience rapid temperature changes are currently poorly understood. In this research, a methodology for studying and quantification of such processes is developed. In the experimental case study, the ignition temperature of Mg powder coated on the surface of an electrically heated filament is detected optically at different heating rates. To interpret the results, a heat transfer model has been developed for a multilayer powder coating on top of an electrically heated filament. The coating is modeled using a hexagonal close packed geometry and the heat transfer equations are …