5,032 research outputs found
Salvage
A man tries to rebuild his father\u27s salvage yard and construct a straight life after addiction and prison; he discovers a fifteen-year-old runaway girl sleeping in a 1976 Chrysler New Yorker Brougham he had planned to restore, and takes her in
Modal Coupling of Single Photon Emitters Within Nanofiber Waveguides
Nanoscale generation of individual photons in confined geometries is an
exciting research field aiming at exploiting localized electromagnetic fields
for light manipulation. One of the outstanding challenges of photonic systems
combining emitters with nanostructured media is the selective channelling of
photons emitted by embedded sources into specific optical modes and their
transport at distant locations in integrated systems. Here, we show that
soft-matter nanofibers, electrospun with embedded emitters, combine
subwavelength field localization and large broadband near-field coupling with
low propagation losses. By momentum spectroscopy, we quantify the modal
coupling efficiency identifying the regime of single-mode coupling. These
nanofibers do not rely on resonant interactions, making them ideal for
room-temperature operation, and offer a scalable platform for future quantum
information technology
Automatic Intent-Based Secure Service Creation Through a Multilayer SDN Network Orchestration
Growing traffic demands and increasing security awareness are driving the
need for secure services. Current solutions require manual configuration and
deployment based on the customer's requirements. In this work, we present an
architecture for an automatic intent-based provisioning of a secure service in
a multilayer - IP, Ethernet, and optical - network while choosing the
appropriate encryption layer using an open-source software-defined networking
(SDN) orchestrator. The approach is experimentally evaluated in a testbed with
commercial equipment. Results indicate that the processing impact of secure
channel creation on a controller is negligible. As the time for setting up
services over WDM varies between technologies, it needs to be taken into
account in the decision-making process.Comment: Parts of the presented work has received funding from the European
Commission within the H2020 Research and Innovation Programme, under grant
agreeement n.645127, project ACIN
Correlation energies of the high-density spin-polarized electron gas to meV accuracy
We present a combination of quantum Monte Carlo methods and a finite-size extrapolation framework with which we calculate the thermodynamic limit of the exact correlation energy of the polarized electron gas at high densities to meV accuracy, −40.44(5) and −31.70(4) mHa at rs=0.5 and 1, respectively. The fixed-node error is characterized and found to exceed 1 mHa, and we show that the magnitude of the correlation energy of the polarized electron gas is underestimated by up to 6 meV by the Perdew-Wang parametrization, for which we suggest improvements
W=0 Pairing in Carbon Nanotubes away from Half Filling
We use the Hubbard Hamiltonian on the honeycomb lattice to represent the
valence bands of carbon single-wall nanotubes. A detailed symmetry
analysis shows that the model allows W=0 pairs which we define as two-body
singlet eigenstates of with vanishing on-site repulsion. By means of a
non-perturbative canonical transformation we calculate the effective
interaction between the electrons of a W=0 pair added to the interacting ground
state. We show that the dressed W=0 pair is a bound state for resonable
parameter values away from half filling. Exact diagonalization results for the
(1,1) nanotube confirm the expectations. For nanotubes of length ,
the binding energy of the pair depends strongly on the filling and decreases
towards a small but nonzero value as . We observe the existence
of an optimal doping when the number of electrons per C atom is in the range
1.21.3, and the binding energy is of the order of 0.1 1 meV.Comment: 16 pages, 6 figure
Public engagement in urban innovation: towards the concept of inclusive mobility
In the process towards smart city, the concept of public transportation has evolved as a set of socio-material entanglements by highlighting the social impacts. This research offers a community-based approach to identify criteria for the design towards inclusive mobility by setting a validation model to measure and extract collected stakeholders’ data. The study provides a thematization of optimizing strategies to address mobility in future smart city actions towards sustainable community development, aiming to inspire further research in Italy and beyond
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