346 research outputs found
Steady-State Analysis of Load Balancing with Coxian- Distributed Service Times
This paper studies load balancing for many-server ( servers) systems. Each
server has a buffer of size and can have at most one job in service and
jobs in the buffer. The service time of a job follows the Coxian-2
distribution. We focus on steady-state performance of load balancing policies
in the heavy traffic regime such that the normalized load of system is for We identify a set of policies that
achieve asymptotic zero waiting. The set of policies include several classical
policies such as join-the-shortest-queue (JSQ), join-the-idle-queue (JIQ),
idle-one-first (I1F) and power-of--choices (Po) with . The proof of the main result is based on Stein's method and state space
collapse. A key technical contribution of this paper is the iterative state
space collapse approach that leads to a simple generator approximation when
applying Stein's method
Transient Analysis of Microgrids with Parallel Synchronous Generators and Virtual Synchronous Generators
E1-Like Activating Enzyme Atg7 Is Preferentially Sequestered into p62 Aggregates via Its Interaction with LC3-I
p62 is constitutively degraded by autophagy via its interaction with LC3. However, the interaction of p62 with LC3 species in the context of the LC3 lipidation process is not specified. Further, the p62-mediated protein aggregation's effect on autophagy is unclear. We systemically analyzed the interactions of p62 with all known Atg proteins involved in LC3 lipidation. We find that p62 does not interact with LC3 at the stages when it is being processed by Atg4B or when it is complexed or conjugated with Atg3. p62 does interact with LC3-I and LC3-I:Atg7 complex and is preferentially recruited by LC3-II species under autophagic stimulation. Given that Atg4B, Atg3 and LC3-Atg3 are indispensable for LC3-II conversion, our study reveals a protective mechanism for Atg4B, Atg3 and LC3-Atg3 conjugate from being inappropriately sequestered into p62 aggregates. Our findings imply that p62 could potentially impair autophagy by negatively affecting LC3 lipidation and contribute to the development of protein aggregate diseases. © 2013 Gao et al
Ising model on nonorientable surfaces: Exact solution for the Moebius strip and the Klein bottle
Closed-form expressions are obtained for the partition function of the Ising
model on an M x N simple-quartic lattice embedded on a Moebius strip and a
Klein bottle for finite M and N. The finite-size effects at criticality are
analyzed and compared with those under cylindrical and toroidal boundary
conditions. Our analysis confirms that the central charge is c=1/2.Comment: 8 pages, 3 eps figure
ELUCID V. Lighting dark matter halos with galaxies
In a recent study, using the distribution of galaxies in the north galactic
pole of SDSS DR7 region enclosed in a 500\mpch box, we carried out our ELUCID
simulation (Wang et al. 2016, ELUCID III). Here we {\it light} the dark matter
halos and subhalos in the reconstructed region in the simulation with galaxies
in the SDSS observations using a novel {\it neighborhood} abundance matching
method. Before we make use of thus established galaxy-subhalo connections in
the ELUCID simulation to evaluate galaxy formation models, we set out to
explore the reliability of such a link. For this purpose, we focus on the
following a few aspects of galaxies: (1) the central-subhalo luminosity and
mass relations; (2) the satellite fraction of galaxies; (3) the conditional
luminosity function (CLF) and conditional stellar mass function (CSMF) of
galaxies; and (4) the cross correlation functions between galaxies and the dark
matter particles, most of which are measured separately for all, red and blue
galaxy populations. We find that our neighborhood abundance matching method
accurately reproduces the central-subhalo relations, satellite fraction, the
CLFs and CSMFs and the biases of galaxies. These features ensure that thus
established galaxy-subhalo connections will be very useful in constraining
galaxy formation processes. And we provide some suggestions on the three levels
of using the galaxy-subhalo pairs for galaxy formation constraints. The
galaxy-subhalo links and the subhalo merger trees in the SDSS DR7 region
extracted from our ELUCID simulation are available upon request.Comment: 18 pages, 13 figures, ApJ accepte
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