The identification of a causal-connection scale motivates us to propose a new covariant bound on entropy within a generic space-like region. This “causal entropy bound”, scaling as √ EV , and thus lying around the geometric mean of Bekenstein’s S/ER and holographic S/A bounds, is checked in various “critical” situations. In the case of limited gravity, Bekenstein’s bound is the strongest while ...

We construct exact 2d CFTs, corresponding to closed string tachyon and metric profiles invariant under shifts in a null coordinate, which can be constructed from any 2d renormalization group flow. These solutions satisfy first order equations of motion in the conjugate null coordinate. The direction along which the tachyon varies is identified precisely with the wordsheet scale, and the tachyon...

Although Ginsenosides are a major physiological component of red ginseng (RG), some isolated ginsenosides known to have cytotoxic activity. This study was intended reduce cytotoxicity and promote anti-inflammatory activity by mixing the crude (RG-CG) polysaccharides (RG-CP). RG-CG-CM, fractionated from RG-CG, not only had higher than that RG-CG at 100 μg/mL, but also showed increased cytotoxici...

We use renormalization group (RG) techniques to prove the nonlinear asymptotic stability for the semistrong regime of two-pulse interactions in a regularized Gierer–Meinhardt system. In the semistrong limit the localized activator pulses interact strongly through the slowly varying inhibitor. The interaction is not tail-tail as in the weak interaction limit, and the pulse amplitudes and speeds ...

Lee-Suzuki similarity transformations and Krencigowa-Kuo folded diagrams are two common methods used to derive energy independent model space effective interactions for nuclear many-body systems. We demonstrate that these two methods are equivalent to a Renormalization Group (RG) analysis of a toy 2-body problem. This is accomplished by considering a schematic model that can be solved in closed...