Abstract We investigate the ringdown waveform and reflectivity of a Lifshitz scalar field around fixed Schwarzschild black hole. The radial wave equation is modified due to Lorentz breaking terms, which leads diversity waveforms. Also, it turns out that waves scattered by hole exhibit superradiance. terms lead superluminal propagation high-frequency modes can enter leave interior Killing horizo...

The cultural and architectural history of Pera, also known as Galata, has been the focus many studies. However, its soundscape not attracted much scholarly interest to date. present study fills part this gap by tracing bell ringing in settlement. Written material evidence sheds light on use bells Latin community Pera from period Genoese rule until late Ottoman Empire. Sounds silence provide new...

In this paper, the tensile testing method at the intermediate strain rate is established and tensile tests of steel sheets for an auto-body have been performed to evaluate dynamic material properties. A high speed tensile testing machine has been developed for tensile tests at the intermediate strain rate. A simple jig fixture for gripping a specimen has been designed to diminish the load ringi...

Background We demonstrate that projection imaging significantly reduces the prevalence and spatial extent of subendocardial dark-rim artifacts (DRAs) in first-pass perfusion (FPP) myocardial MR, compared to conventional Cartesian techniques. A major cause of DRAs, which remain a major concern in FPP imaging, is known to be the socalled Gibbs ringing (truncation) phenomenon [1-3]. Radial k-space...

We propose to design the reduction operator of an image pyramid so as to minimize the approximation error in the l(p)-sense (not restricted to the usual p=2), where p can take noninteger values. The underlying image model is specified using shift-invariant basis functions, such as B-splines. The solution is well-defined and determined by an iterative optimization algorithm based on digital filt...