In this paper, we consider spatial predator-prey models with diffusion and prey-taxis. We investigate necessary conditions for pattern formation using a variety of non-linear functional responses, linear and non-linear predator death terms, linear and non-linear prey-taxis sensitivities, and logistic growth or growth with an Allee effect for the prey. We identify combinations of the above non-l...

We report on the experimental observation of speckle formation from a transparent crystal formed by a random distribution of nonlinear domains. The angular distribution of second-harmonic light generated by a transparent strontium barium niobate crystal is measured for different diameters of the fundamental beam and crystal thicknesses. Distinct manifestations of speckle pattern formation are f...

The effects of non-equilibrium charge screening in mixtures of oppositely charged interacting molecules on surfaces are analyzed in a closed system. The dynamics of charge screening and the strong deviation from the standard Debye-Hückel theory are demonstrated via a new formalism based on computing radial distribution functions suited for analyzing both short-range and long-range spacial order...

We present an experimental and theoretical investigation of spontaneous pattern formation in the transverse section of a single retroreflected laser beam passing through a cloud of cold rubidium atoms. In contrast to previously investigated systems, the nonlinearity at work here is that of a two-level atom, which realizes the paradigmatic situation considered in many theoretical studies of opti...

conclusions the results of this work demonstrated that the subcellular distribution of pfdn1 was altered in the rabv-infected n2a cells and colocalized with the n protein of rabv in the nbl structures. results confocal microscopy showed that pfdn1 was colocalized with the n protein of rabv in the infected n2a cells and was mainly recruited to the characteristic negri-body-like (nbl) structures ...

The issue whether people with Type 1 Diabetes can safely fast during Ramadan has been the subject of quite a few debates over the years. Had it been a simple "yes" or "no" issue, there would have been no reason to debate. However, like a lot of other topics in medical management, this particular subject overlaps both the science and the art of medicine.

A shortage of donor organs and increasing dependence on marginal grafts with prolonged ischemic times have meant that new methods are needed to prevent postischemic damage. Herein is reported a new strategy aimed to protect donor kidney from complement-mediated postischemic damage and therefore increase the number of successful transplants. Rat donor kidneys were perfused with a membrane-locali...

RECENTL Y we reported that. in human liver transplantation, a preservation period of greater than 20 hours caused the rate of graft failure to increase nonlinearly.l Even with University of Wisconsin (UW) solution. there is a finite limit to the permissible time of cold storage of livers. In this study, we investigated whether microcirculatory disturbance during and after preservation is correl...