2,802 research outputs found
Law of large numbers for branching symmetric Hunt processes with measure-valued branching rates
We establish weak and strong law of large numbers for a class of branching
symmetric Hunt processes with the branching rate being a smooth measure with
respect to the underlying Hunt process, and the branching mechanism being
general and state-dependent. Our work is motivated by recent work on strong law
of large numbers for branching symmetric Markov processes by Chen-Shiozawa [J.
Funct. Anal., 250, 374--399, 2007] and for branching diffusions by
Engl\"ander-Harris-Kyprianou [Ann. Inst. Henri Poincar\'e Probab. Stat., 46,
279--298, 2010]. Our results can be applied to some interesting examples that
are covered by neither of these papers
Strong law of large numbers for supercritical superprocesses under second moment condition
Suppose that is a supercritical superprocess on a locally
compact separable metric space . Suppose that the spatial motion of
is a Hunt process satisfying certain conditions and that the branching
mechanism is of the form where , and is a kernel from to
satisfying Put
. Let be the largest
eigenvalue of the generator of , and and be
the eigenfunctions of and (the dural of ) respectively
associated with . Under some conditions on the spatial motion and
the -transformed semigroup of , we prove that for a large class of
suitable functions , we have for any finite initial measure on with compact support, where
is the martingale limit defined by
. Moreover, the
exceptional set in the above limit does not depend on the initial measure
and the function
Comparative validation of the D. melanogaster modENCODE transcriptome annotation
Accurate gene model annotation of reference genomes is critical for making them useful. The modENCODE project has improved the D. melanogaster genome annotation by using deep and diverse high-throughput data. Since transcriptional activity that has been evolutionarily conserved is likely to have an advantageous function, we have performed large-scale interspecific comparisons to increase confidence in predicted annotations. To support comparative genomics, we filled in divergence gaps in the Drosophila phylogeny by generating draft genomes for eight new species. For comparative transcriptome analysis, we generated mRNA expression profiles on 81 samples from multiple tissues and developmental stages of 15 Drosophila species, and we performed cap analysis of gene expression in D. melanogaster and D. pseudoobscura. We also describe conservation of four distinct core promoter structures composed of combinations of elements at three positions. Overall, each type of genomic feature shows a characteristic divergence rate relative to neutral models, highlighting the value of multispecies alignment in annotating a target genome that should prove useful in the annotation of other high priority genomes, especially human and other mammalian genomes that are rich in noncoding sequences. We report that the vast majority of elements in the annotation are evolutionarily conserved, indicating that the annotation will be an important springboard for functional genetic testing by the Drosophila community
Bis{2-[(E)-benzyliminomethyl]-4-methylphenolato-κ2 N,O}nickel(II)
In the title complex, [Ni(C15H14NO)2], the NiII atom is located on an inversion centre and is coordinated by two O and two N atoms from two symmetry-related bidentate Schiff base ligands in a slightly distorted square-planar geometry. The phenyl and benzene rings in the ligand molecule form a dihedral angle of 72.79 (8)°
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