31,484 research outputs found
Shifts of neutrino oscillation parameters in reactor antineutrino experiments with non-standard interactions
We discuss reactor antineutrino oscillations with non-standard interactions
(NSIs) at the neutrino production and detection processes. The neutrino
oscillation probability is calculated with a parametrization of the NSI
parameters by splitting them into the averages and differences of the
production and detection processes respectively. The average parts induce
constant shifts of the neutrino mixing angles from their true values, and the
difference parts can generate the energy (and baseline) dependent corrections
to the initial mass-squared differences. We stress that only the shifts of
mass-squared differences are measurable in reactor antineutrino experiments.
Taking Jiangmen Underground Neutrino Observatory (JUNO) as an example, we
analyze how NSIs influence the standard neutrino measurements and to what
extent we can constrain the NSI parameters.Comment: a typo in Eq.(25) fixed after published version, discussion and
conclusion unchange
Distributed Collaborative Monitoring in Software Defined Networks
We propose a Distributed and Collaborative Monitoring system, DCM, with the
following properties. First, DCM allow switches to collaboratively achieve flow
monitoring tasks and balance measurement load. Second, DCM is able to perform
per-flow monitoring, by which different groups of flows are monitored using
different actions. Third, DCM is a memory-efficient solution for switch data
plane and guarantees system scalability. DCM uses a novel two-stage Bloom
filters to represent monitoring rules using small memory space. It utilizes the
centralized SDN control to install, update, and reconstruct the two-stage Bloom
filters in the switch data plane. We study how DCM performs two representative
monitoring tasks, namely flow size counting and packet sampling, and evaluate
its performance. Experiments using real data center and ISP traffic data on
real network topologies show that DCM achieves highest measurement accuracy
among existing solutions given the same memory budget of switches
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