The Kerr black holes possess a photon region with prograde and retrograde orbits radii, respectively, $M\leq r_p^-\leq 3M$ $3M\leq r_p^+\leq 4M$, thereby always cast closed ring or shadow silhouette for $a\leq M$. For $a>M$, it is no-horizon spacetime (naked singularity) wherein spiral into the central singularity, produce an arc-like dark spot at center. We compare holes' structure those produ...

research on stress and stress perception has primarily focused on the acoustic characteristics of stressed versus unstressed syllables, and how listeners make use of acoustic cues to make judgements as regards the occurrence of stress. Most phoneticians agree that the three acoustic dimensions involved in the realisation of stress are duration, fundamental frequency, and intensity. These acoust...

Over 25 years ago, Hyman (1983, 1985) made the claim that Gokana, an Ogoni (Niger-Congo) language of Nigeria, does not organise its consonants and vowels into syllables. This was a radical and in principle non-welcome position, given the centrality of the syllable in almost all phonological work at the time. Still, as Richard Hayward pointed out many years later, the extensive treatment of Goka...

Calculations of the inner mass function Hayward regular black hole with fluxes are reviewed and rederived. We present detailed calculations in two forms Ori approach (the ingoing flux is continuous, outgoing modeled by a thin null shell) compare them Reissner–Nordström hole. A formal reason different results discussed. The energy density scalar perturbations propagating from event horizon into ...

Present address: Xiao-Liang Wang, Seeo, Inc., 3906 Trust Way, Hayward, CA 94545, USA The review presents an overview of the recent advances in inorganic solid lithium ion conductors, which are of great interest as solid electrolytes in all-solid-state lithium batteries. It is focused on two major categories: crystalline electrolytes and glass-based electrolytes. Important systems such as thio-L...

Earthquake early warning (EEW) can reduce harm to people and infrastructure from earthquakes and tsunamis, but it has not been implemented in most high earthquake-risk regions because of prohibitive cost. Common consumer devices such as smartphones contain low-cost versions of the sensors used in EEW. Although less accurate than scientific-grade instruments, these sensors are globally ubiquitou...