A Fourier domain watermark localized near image feature points is presented in an attempt to make an invisible watermark that is robust to common image processing attacks. Finding robust feature points allows for localized watermarking to be detected after attacks. The feature points are found using the Harris corner detector. Points that respond greatest to the Harris corner detector will ofte...

Recent studies have shown that blood flow during closed-chest cardiopulmonary resuscitation (CPR) results primarily from generalized changes in intrathoracic pressure rather than direct compression of the heart. Since ascending aortic and right atrial pressures rise and fall synchronously and to comparable levels during CPR, we hypothesized that the absence of a pressure difference across the c...

The crack propagation evolution of carbonaceous mudstone under the action dry-wet cycles is an important cause unstable failure this type slope. This paper attempts to reveal mechanism mesocrack and macrocrack in from chemical, physical, mechanical perspectives. Firstly, soaking solution during was extracted for ion concentration test analyze chemical reactions mudstone. Then, CT scans were per...

Hypersonic laminar flow over a canonical 25°–55° double cone is studied using computational fluid dynamics and global stability analysis (GSA) with free-stream Mach number of 11.5 various unit Reynolds numbers. Axisymmetric simulations reveal that secondary separation occurs beneath the primary bubble beyond critical number. The numerical results agree well existing experiments triple-deck theo...