A bstract We study the waveforms of time signals produced by scalar perturbations in static hairy black holes, which can be governed a double-peak effective potential. The inner potential peak would give rise to echoes, provide powerful tool test Kerr hypothesis. are constructed and frequency domains, we find that late-time determined long-lived sub-long-lived quasinormal modes, trapped valley ...

Introduction Multislice excitation methods have been widely used to increase efficiency in volume coverage. In the simultaneous spin-echo refocusing sequence (SER) [1], two or more slices are excited simultaneously and refocused with a train of 180° pulses which act simultaneously on both slices. However, the SER sequence does not fulfil CPMG conditions, and requires special spoiler gradients t...

Misinformation about tobacco products is ubiquitous in the public communication environment. This information is promulgated via tobacco product marketing strategies as well as the inferences that consumers make and then circulate to others in the fast-moving new media world. Misinformation can be explicit or implicit. Explicit misinformation is factually incorrect (low nicotine cigarettes are ...

We investigated the preservation of information encoded into the relative phase and amplitudes of optical pulses during storage and retrieval in an optical memory based on stimulated photon echo. By interfering photon echoes produced in a single-mode Ti:Er:LiNbO(3) waveguide, we found that decoherence in the medium translates only as loss and not as degradation of information. We measured a vis...

• Two features of A-V transmission previously attributed to a dual conduction system; namely, "abnormal" delay in the A-V propagation of early premature atrial responses, and alteration of the configuration of the corresponding ventricular electrograms, have been adequately explained as due to aberrant conduction within the intraventricular conduction system,and more specifically as the result ...

We demonstrate a new method of using ultrasound data to achieve prospective motion compensation in MRI, especially for respiratory motion during interventional MRI procedures in moving organs such as the liver. The method relies on fingerprint-like biometrically distinct ultrasound echo patterns produced by different locations in tissue, which are collated with geometrical information from MRI ...