5,109 research outputs found
Role of Many-particle excitations in Coulomb Blockaded Transport
We discuss the role of electron-electron and electron-phonon correlations in
current flow in the Coulomb Blockade regime, focusing specifically on
nontrivial signatures arising from the break-down of mean-field theory. By
solving transport equations directly in Fock space, we show that
electron-electron interactions manifest as gateable excitations experimentally
observed in the current-voltage characteristic. While these excitations might
merge into an incoherent sum that allows occasional simplifications, a clear
separation of excitations into slow `traps' and fast `channels' can lead to
further novelties such as negative differential resistance, hysteresis and
random telegraph signals. Analogous novelties for electron-phonon correlation
include the breakdown of commonly anticipated Stokes-antiStokes intensities,
and an anomalous decrease in phonon population upon heating due to reabsorption
of emitted phonons.Comment: 14 pages 10 figures, Invited article for the special issue on
"Conductivity of single molecules and supramolecular architectures", IOP
Journal of Physics Condensed matte
Jordan weak amenability and orthogonal forms on JB*-algebras
We prove the existence of a linear isometric correspondence between the
Banach space of all symmetric orthogonal forms on a JB-algebra
and the Banach space of all purely Jordan generalized derivations
from into . We also establish the existence of a
similar linear isometric correspondence between the Banach spaces of all
anti-symmetric orthogonal forms on , and of all Lie Jordan
derivations from into
Hydraulic characteristics of pilot distributaries in the Mirpurkhas, Sanghar and Nawabshah districts, Sindh, Pakistan
Discharge frequency / Hydraulics / Flow / Water loss / Seepage / Water distribution / Pakistan / Sindh / Mirpurkhas / Sanghar / Nawabshah
ATP dependent assembly of the human origin recognition complex
The Origin Recognition Complex (ORC) was initially discovered in budding yeast extracts as a protein complex that binds with high affinity to Autonomously Replicating Sequences (ARS) in an ATP dependent manner. We have cloned and expressed the human homologs of the ORC subunits as recombinant proteins. In contrast to other eukaryotic initiators examined thus far, assembly of human ORC in vitro is dependent on ATP binding. Mutations in the ATP binding sites of Orc4 or Orc5 impair complex assembly, whereas Orc1 ATP binding is not required. Immunofluorescence staining of human cells with anti-Orc3 antibodies demonstrate cell cycle-dependent association with a nuclear structure. Immunoprecipitation experiments show that ORC disassembles as cells progress through S phase. The Orc6 protein binds directly to the Orc3 subunit and interacts as part of ORC in vivo. These data suggest that the assembly and disassembly of ORC in human cells is uniquely regulated and may contribute to restricting DNA replication to once in every cell division cycle
Immune thrombocytopenic purpura in a 5-month-old female with rotavirus infection
No Abstract.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/65028/1/22368_ftp.pd
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