Oh, where have you been, my blue-eyed son? Oh, where have you been, my darling young one? I've stumbled on the side of twelve misty mountains I've walked and I've crawled on six crooked highways I've stepped in the middle of seven sad forests I've been out in front of a dozen dead oceans I've been ten thousand miles in the mouth of a graveyard And it's a hard, and it's a hard, it's a hard, and ...

Consider the system of particles on Z a where particles are of two types A and B--and execute simple random walks in continuous time. Particles do not interact with their own type, but when an A-particle meets a B-particle, both disappear, i.e., are annihilated. This system serves as a model for the chemical reaction A + B ~ inert. We analyze the limiting behavior of the densities pA(t) and pB(...

We obtain the hydrodynamic limit of one-dimensional interacting particle systems describing the macroscopic evolution of the density of mass in infinite volume from the microscopic dynamics. The processes are weak pertubations of the symmetric exclusion process by shift operators describing the spread of particles around positions where new sites are created.

There are errors in the affiliations for authors Patricia Q. Rodriguez and Jaakko Patrakka. Both authors are affiliated with #1, Division of Matrix Biology, Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden, and #2 KI/AZ Integrated CardioMetabolic Center, Department of Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm,...

Derrida et al. and Schütz and Stinchcombe gave algebraic formulas for the correlation functions of the partially asymmetric simple exclusion process. Here we give a fairly general recipe of how to get these formulas and extend them to the whole time evolution (starting from the generator of the process), for a certain class of interacting systems. We then analyze the algebraic relations obtaine...

Technologies have been developed in animal germ cells that produce artificial piRNAs from transgenes in piRNA clusters to silence target genes by cleaving their transcripts. A new study provides a simple way to generate artificial piRNAs to direct de novo DNA methylation in mice.

he role of additives has long been a theme in sintering science. Recently, it has been discovered that ceramics may contain multiple different rain boundary phases (complexions) that are chemically induced by certain additives. These complexions are useful in explaining a number of nomalous phenomena associated with sintering, such as abnormal grain growth. The current work investigates how tra...