title:
Ray tracing Einstein-{\AE}ther black holes: Universal versus Killing
  horizons

abstract:
  Violating Lorentz-invariance, and so implicitly permitting some form of
superluminal communication, necessarily alters the notion of a black hole.
Nevertheless, in both Einstein-{\AE}ther gravity, and Ho\v{r}ava-Lifshitz
gravity, there is still a causally disconnected region in black-hole solutions;
now being bounded by a "Universal horizon", which traps excitations of
arbitrarily high velocities. To better understand the nature of these black
holes, and their Universal horizons, we study ray trajectories in these
spacetimes. We find evidence that Hawking radiation is associated with the
Universal horizon, while the "lingering" of ray trajectories near the Killing
horizon hints at reprocessing there. In doing this we solve an apparent
discrepancy between the surface gravity of the Universal horizon and the
associated temperature derived by tunneling method. These results advance the
understanding of these exotic horizons, and provide hints for a full
understanding of black-hole thermodynamics in Lorentz-violating theories.


title: Ramsey-comb spectroscopy with intense ultrashort laser pulses

abstract:
  Optical frequency combs based on mode-locked lasers have revolutionised the
field of metrology and precision spectroscopy by providing precisely calibrated
optical frequencies and coherent pulse trains. Amplification of the pulsed
output from these lasers is very desirable, as nonlinear processes can then be
employed to cover a much wider range of transitions and wavelengths for
ultra-high precision, direct frequency comb spectroscopy. Therefore full
repetition rate laser amplifiers and enhancement resonators have been employed
to produce up to microjoule-level pulse energies. Here we show that the full
frequency comb accuracy and resolution can be obtained by using only two
frequency comb pulses amplified to the millijoule pulse energy level, orders of
magnitude more energetic than what has previously been possible. The novel
properties of this approach, such as cancellation of optical light-shift
effects, is demonstrated on weak two-photon transitions in atomic rubidium and
caesium, thereby improving the frequency accuracy up to thirty times.


title: Independence and Matching Number in Graphs with Maximum Degree 4

abstract:
  We prove that $\frac{7}{4}\alpha(G)+\beta(G)\geq n(G)$ and
$\alpha(G)+\frac{3}{2}\beta(G)\geq n(G)$ for every triangle-free graph $G$ with
maximum degree at most $4$, where $\alpha(G)$ is the independence number and
$\beta(G)$ is the matching number of $G$, respectively. These results are sharp
for a graph on $13$ vertices. Furthermore we show $\chi(G)\leq
\frac{7}{4}\omega(G)$ for $\{3K_1,K_1\cup K_5\}$-free graphs, where $\chi(G)$
is the chromatic number and $\omega(G)$ is the clique number of $G$,
respectively.


title: Asymptotic Solutions for Mean-Field Slab Dynamos

abstract:
  We discuss asymptotic solutions of the kinematic $\alpha\omega$-dynamo in a
thin disc (slab). Focusing upon the strong dynamo regime, in which the dynamo
number $D$ satisfies $|D|\gg1$, we resolve uncertainties in the earlier
treatments and conclude that some of the simplifications that have been made in
previous studies are questionable. Comparing numerical solutions with
asymptotic results obtained for $|D|\gg1$ and $|D|\ll1$ we find that the
asymptotic solutions give a reasonably accurate description of the dynamo even
far beyond their formal ranges of applicability. Indeed, our results suggest a
simple analytical expression for the growth rate of the mean magnetic field
that remains accurate in the range $-200< D< -10$ (which is appropriate for
dynamos in spiral galaxies and accretion discs). Finally, we analyse the role
of various terms in the dynamo equations to clarify the fine details of the
dynamo process.


title:
Double hybrid density-functional theory using the Coulomb-attenuating
  method

abstract:
  A double hybrid approximation using the Coulomb-attenuating method (CAM-DH)
is derived within range-separated density-functional perturbation theory, in
the spirit of a recent work by Cornaton {\it et al.} [Phys. Rev. A 88, 022516
(2013)]. The energy expression recovered through second order is linear in the
parameters $\alpha$ and $\beta$ that control the Coulomb attenuation. The
method has been tested within the local density approximation on a small test
set consisting of rare-gas and alkaline-earth-metal dimers as well as diatomics
with single, double and triple bonds. In this context, the semi-empirical
$\alpha=0.19$ and $\beta=0.46$ parameters, that were optimized for the hybrid
CAM-B3LYP functional, do not provide accurate interaction and total energies.
Using semi-local functionals with density scaling, that was neglected in this
work, may lead to different conclusions. Calibration studies on a larger test
set would be necessary at this point. This is left for future work. Finally, we
propose as a perspective an alternative CAM-DH approach that relies on the
perturbation expansion of a partially long-range interacting wavefunction. In
this case the energy is not linear anymore in $\alpha$ and $\beta$. Work is in
progress in this direction.


title:
Selected results from the static characterization of edgeless n-on-p
  planar pixel sensors for ATLAS upgrades

abstract:
  In view of the LHC upgrade for the High Luminosity Phase (HL-LHC), the ATLAS
experiment is planning to replace the Inner Detector with an all-Silicon
system. The n-on-p technology represents a valid solution for the modules of
most of the layers, given the significant radiation hardness of this option and
the reduced cost. There is also the demand to reduce the inactive areas to a
minimum. The ATLAS LPNHE Paris group and FBK Trento started a collaboration for
the development on a novel n-on-p edgeless planar pixel design, based on the
deep-trench process which can cope with all these demands. This paper reports
selected results from the electrical characterization, both before and after
irradiation, of test structures from the first production batch.


title:
Generating of short pulses with high amplitudes by using of standard
  Current-Feedback-Amplifier

abstract:
  The traditional method to generate pulses in the range of some nanoseconds
with high amplitudes, is the using of the avalanche-effect of transistors.
However the problem with this method is the poor possibility for
parameterizing. That was the trigger to look for a different way: under using
of modern electronic components, a pulse generator, which is parameterizable,
was developed. The parameters can be set by using a Windows- or Linux-PC. The
pulse width can be adjusted in the range of 3....80 ns; the pulse amplitude in
the range of 18...84 V and the pulse repetition rate in the range of 1 Hz to 50
kHz.


title: Practical Collapsed Stochastic Variational Inference for the HDP

abstract:
  Recent advances have made it feasible to apply the stochastic variational
paradigm to a collapsed representation of latent Dirichlet allocation (LDA).
While the stochastic variational paradigm has successfully been applied to an
uncollapsed representation of the hierarchical Dirichlet process (HDP), no
attempts to apply this type of inference in a collapsed setting of
non-parametric topic modeling have been put forward so far. In this paper we
explore such a collapsed stochastic variational Bayes inference for the HDP.
The proposed online algorithm is easy to implement and accounts for the
inference of hyper-parameters. First experiments show a promising improvement
in predictive performance.


title: G\"odel algebras: interactive dualities and their applications

abstract:
  We present a technique for deriving certain new natural dualities for any
variety of algebras generated by a finite Heyting chain.
  The dualities we construct are tailored to admit a transparent translation to
the more pictorial Priestley/Esakia duality and back again.
  This enables us to combine the two approaches and so to capitalise on the
virtues of both, in particular the categorical good behaviour of a natural
duality: we thereby demonstrate the fullness, or not, of each of our dualities;
we obtain new results on amalgamation; and we also provide a simple treatment
of coproducts.


title:
Coherent control of optical activity and optical anisotropy of thin
  metamaterials

abstract:
  The future fibre optic communications network will rely on photons as
carriers of information, which may be stored in intensity, polarization or
phase of light. However, processing of such optical information usually relies
on electronics. Aiming to avoid the conversion between optical and electronic
signals, modulation of light with light based on optical nonlinearity has
become a major research field, but real integrated all-optical systems face
thermal management and energy challenges. On the other hand, it has recently
been demonstrated that the interaction of two coherent light beams on a thin,
lossy, linear material can lead to large and ultrafast intensity modulation at
arbitrarily low power resulting from coherent absorption. Here we demonstrate
that birefringence and optical activity (linear and circular birefringence and
dichroism) of functional materials can be coherently controlled by placing a
thin material slab into a standing wave formed by the signal and control waves.
Efficient control of the polarization azimuth and ellipticity of the signal
wave with the coherent control wave has been demonstrated in proof-of-principle
experiments in different chiral and anisotropic microwave metamaterials.


title:
An analysis of elastic scattering reactions with a Fermi-Dirac pomeron
  opaqueness in impact parameter space

abstract:
  In the Bourrely-Soffer-Wu model (BSW) we introduce for the pomeron a new
opaqueness in impact parameter space in terms of different quark contributions
described by a Fermi-Dirac distribution. In order to check the validity of this
assumption we consider $p~p$, $\bar p~p$, and $\pi^{\pm}~p$ elastic scattering.
We emphasize the role of the gluon above the diffraction peak in the
differential cross sections. Once these contributions are determined we extend
the model to light nuclei elastic reactions like $p~d$, $p~^4\mbox{He}$ and
$\pi^{\pm}~^4\mbox{He}$. The results obtained show a good description of all
these elastic processes over the available experimental energy range and
moderate momentum transfer.


title: Asymptotic equivalence for regression under fractional noise

abstract:
  Consider estimation of the regression function based on a model with
equidistant design and measurement errors generated from a fractional Gaussian
noise process. In previous literature, this model has been heuristically linked
to an experiment, where the anti-derivative of the regression function is
continuously observed under additive perturbation by a fractional Brownian
motion. Based on a reformulation of the problem using reproducing kernel
Hilbert spaces, we derive abstract approximation conditions on function spaces
under which asymptotic equivalence between these models can be established and
show that the conditions are satisfied for certain Sobolev balls exceeding some
minimal smoothness. Furthermore, we construct a sequence space representation
and provide necessary conditions for asymptotic equivalence to hold.


title: Revisiting heat capacity of bulk polycrystalline YBa2Cu3O7-{\delta}

abstract:
  In this letter, we present the superconducting property characterization of a
phase pure reasonably good quality YBa2Cu3O7-{\delta} sample. Studied compound
is crystallized in orthorhombic Pmmm space group with lattice parameters a, b,
and c are 3.829(2) {\AA}, 3.887(1) {\AA} and 11.666(3) {\AA} respectively. Bulk
superconductivity is observed below 90K as evidenced by resistivity and dc/ac
magnetization measurements. The resistivity under magnetic field ({\rho}TH)
measurements showed clearly both the intra-grain and inter-grain transitions,
which are supplemented by detailed (varying frequency and amplitude) ac
susceptibility studies as well. The upper critical field at 0K i.e., Hc2(0)
being determined from {\rho}TH measurements with 50% criteria of resistivity
drope is ~ 70 Tesla. Studied polycrystalline YBa2Cu3O7-{\delta} is subjected to
detailed heat capacity (CP) studies. Cp exhibited well defined anomaly at below
90 K, which decreases with applied field. Though the Cp anomaly/peak at Tc
reduces with applied field, the same is not completely suppressed in high
applied fields of up to 12 Tesla. The Sommerfeld constant ({\gamma}) and Debye
temperature ({\Theta}D) as determined from low temperature fitting of CP(T)
data to Sommerfeld-Debye model, are 10.65 mJ/mole-K2 and 312.3 K respectively.
The results are compared with existing literature on bulk polycrystalline
superconducting YBa2Cu3O7-{\delta} sample


title:
Stability of continuous-time quantum filters with measurement
  imperfections

abstract:
  The fidelity between the state of a continuously observed quantum system and
the state of its associated quantum filter, is shown to be always a
submartingale. The observed system is assumed to be governed by a
continuous-time Stochastic Master Equation (SME), driven simultaneously by
Wiener and Poisson processes and that takes into account incompleteness and
errors in measurements. This stability result is the continuous-time
counterpart of a similar stability result already established for discrete-time
quantum systems and where the measurement imperfections are modeled by a left
stochastic matrix.


title:
Chiral phases of two-dimensional hard-core bosons with frustrated
  ring-exchange

abstract:
  We study the zero temperature phase diagram of two-dimensional hard-core
bosons on a square lattice with nearest neighbour and plaquette (ring-exchange)
hoppings, at arbitrary densities, by means of a hierarchical mean-field theory.
In the frustrated regime, where quantum Monte Carlo suffers from a sign
problem, we find a rich phase diagram where exotic states with nonzero
chirality emerge. Among them, novel insulating phases, characterized by nonzero
bond-chirality and plaquette order, are found over a large region of the
parameter space. In the unfrustrated regime, the hierarchical mean-field
approach improves over the standard mean-field treatment as it is able to
capture the transition from a superfluid to a valence bond state upon
increasing the strength of the ring-exchange term, in qualitative agreement
with quantum Monte Carlo results.


title:
A new fission-fragment detector to complement the CACTUS-SiRi setup at
  the Oslo Cyclotron Laboratory

abstract:
  An array of Parallel Plate Avalanche Counters (PPAC) for the detection of
heavy ions has been developed. The new device, NIFF (Nuclear Instrument for
Fission Fragments), consists of four individual detectors and covers $60\%$ of
2$\pi$. It was designed to be used in conjunction with the SiRi array of
${\Delta}E-E$ silicon telescopes for light charged particles and fits into the
CACTUS array of 28 large-volume NaI scintillation detectors at the Oslo
Cyclotron Laboratory. The low-pressure gas-filled PPACs are sensitive for the
detection of fission fragments, but are insensitive to scattered beam particles
of light ions or light-ion ejectiles. The PPAC detectors of NIFF have good time
resolution and can be used either to select or to veto fission events in
in-beam experiments with light-ion beams and actinide targets. The powerful
combination of SiRi, CACTUS, and NIFF provides new research opportunities for
the study of nuclear structure and nuclear reactions in the actinide region.
The new setup is particularly well suited to study the competition of fission
and $\gamma$ decay as a function of excitation energy.


title:
Spectral theory and inverse problem on asymptotically hyperbolic
  orbifolds

abstract:
  We consider an inverse problem associated with $n$-dimensional asymptotically
hyperbolic orbifolds $(n \geq 2)$ having a finite number of cusps and regular
ends. By observing solutions of the Helmholtz equation at the cusp, we
introduce a generalized $S$-matrix, and then show that it determines the
manifolds with its Riemannian metric and the orbifold structure.


title: On the Motive of a Fibre Bundle and its Applications

abstract:
  In this article we compute the motive associated to a cellular fibration
$\Gamma$ over a smooth scheme $X$ inside Veovodsky's motivic categories. We
implement this result to study the motive associated to a $G$-bundle, and
additionally to study motives of varieties admitting a resolution of
singularities by a tower of cellular fibrations (e.g. affine Schubert varieties
in a twisted affine flag variety).


title: Eigenvalue distribution of large weighted bipartite random graphs

abstract:
  We study eigenvalue distribution of the adjacency matrix $A^{(N,p, \alpha)}$
of weighted random bipartite graphs $\Gamma= \Gamma_{N,p}$. We assume that the
graphs have $N$ vertices, the ratio of parts is $\frac{\alpha}{1-\alpha}$ and
the average number of edges attached to one vertex is $\alpha\cdot p$ or
$(1-\alpha)\cdot p$. To each edge of the graph $e_{ij}$ we assign a weight
given by a random variable $a_{ij}$ with all moments finite.
  We consider the moments of normalized eigenvalue counting measure
$\sigma_{N,p, \alpha}$ of $A^{(N,p, \alpha)}$. The weak convergence in
probability of normalized eigenvalue counting measures is proved.


title:
Optimal insurance purchase strategies via optimal multiple stopping
  times

abstract:
  In this paper we study a class of insurance products where the policy holder
has the option to insure $k$ of its annual Operational Risk losses in a horizon
of $T$ years. This involves a choice of $k$ out of $T$ years in which to apply
the insurance policy coverage by making claims against losses in the given
year. The insurance product structure presented can accommodate any kind of
annual mitigation, but we present three basic generic insurance policy
structures that can be combined to create more complex types of coverage.
Following the Loss Distributional Approach (LDA) with Poisson distributed
annual loss frequencies and Inverse-Gaussian loss severities we are able to
characterize in closed form analytical expressions for the multiple optimal
decision strategy that minimizes the expected Operational Risk loss over the
next $T$ years. For the cases where the combination of insurance policies and
LDA model does not lead to closed form expressions for the multiple optimal
decision rules, we also develop a principled class of closed form
approximations to the optimal decision rule. These approximations are developed
based on a class of orthogonal Askey polynomial series basis expansion
representations of the annual loss compound process distribution and functions
of this annual loss.


title: Robust superconductivity with large upper critical field in Nb2PdS5

abstract:
  We report synthesis, structural details and complete superconducting
characterization of very recently discovered Nb2PdS5 new superconductor. The
synthesized compound is crystallized in mono-clinic structure. Bulk
superconductivity is seen in both magnetic susceptibility and electrical
resistivity measurements with superconducting transition temperature (Tc) at
6K. The upper critical field (Hc2), being estimated from high field
magneto-transport measure-ments is above 240kOe. The estimated Hc2(0) is
clearly above the Pauli paramagnetic limit. Heat capacity measurements show
clear transition with well defined peak at Tc, but with lower jump than as
expected for a BCS type superconductor. The Sommerfield constant and Debye
temperature as determined from low temperature fitting of heat capacity data
are 32mJ/moleK2 and 263K respectively. Hall coefficients and resistivity in
conjugation with electronic heat capacity indicates multiple gap
superconductivity signatures in Nb2PdS5. We also studied the impact of
hydrostatic pressure on superconductivity of Nb2PdS5 and found nearly no change
in Tc for the given pressure range.


title:
Dynamical Instability Induced by Zero Mode Under Symmetry Breaking
  External Perturbation

abstract:
  A complex eigenvalue in the Bogoliubov-de Gennes equations for a stationary
Bose-Einstein condensate in ultracold atomic system indicates the dynamical
instability of the system. We also have the modes with zero eigenvalues for the
condensate, called the zero modes, which originate from the spontaneous
breakdown of symmetries. Although the zero modes are suppressed in many
theoretical analyses, we take account of them in this paper and argue that a
zero mode can change into one with a pure imaginary eigenvalue by applying a
symmetry breaking external perturbation potential. This emergence of a pure
imaginary mode adds a new type of scenario of dynamical instability to that
characterized by complex eigenvalue of the usual excitation modes. For
illustration, we deal with two one-dimensional homogeneous Bose-Einstein
condensate systems with a single dark soliton under a respective perturbation
potential, breaking the invariance under translation, to derive pure imaginary
modes.


title: Telegraph noise effects on two charge-qubits in double quantum dots

abstract:
  We analyze theoretically the decoherence of two interacting electrons in a
double self-assembled quantum dot due to a random telegraph noise. For this
purpose we have examined the pure dephasing rate by evaluating the decoherence
factor. This latter has been shown to be different from that calculated within
the Gaussian approximation in the strong coupling regime. In order to determine
the influence of the random telegraph noise on the entanglement of the system
states, the concurrence, the populations and the entropy are evaluated as well.
Our results show that telegraph noise can severely impact the coherence of
charges qubits.


title: Constraints on RG Flow for Four Dimensional Quantum Field Theories

abstract:
  The response of four dimensional quantum field theories to a Weyl rescaling
of the metric in the presence of local couplings and which involve $a$, the
coefficient of the Euler density in the energy momentum tensor trace on curved
space, is reconsidered. Previous consistency conditions for the anomalous
terms, which implicitly define a metric $G$ on the space of couplings and give
rise to gradient flow like equations for $a$, are derived taking into account
the role of lower dimension operators. The results for infinitesimal Weyl
rescaling are integrated to finite rescalings $e^{2\sigma}$ to a form which
involves running couplings $g_\sigma$ and which interpolates between IR and UV
fixed points. The results are also restricted to flat space where they give
rise to broken conformal Ward identities. Expressions for the three loop Yukawa
$\beta$-functions for a general scalar/fermion theory are obtained and the
three loop contribution to the metric $G$ for this theory are also calculated.
These results are used to check the gradient flow equations to higher order
than previously. It is shown that these are only valid when $\beta \to B$, a
modified $\beta$-function, and that the equations provide strong constraints on
the detailed form of the three loop Yukawa $\beta$-function. ${\cal N}=1$
supersymmetric Wess-Zumino theories are also considered as a special case. It
is shown that the metric for the complex couplings in such theories may be
restricted to a hermitian form.


title:
From information to quanta: A derivation of the geometric formulation of
  quantum theory from information geometry

abstract:
  It is shown that the geometry of quantum theory can be derived from
geometrical structure that may be considered more fundamental. The basic
elements of this reconstruction of quantum theory are the natural metric on the
space of probabilities (information geometry), the description of dynamics
using a Hamiltonian formalism (symplectic geometry), and requirements of
consistency (K\"{a}hler geometry). The theory that results is standard quantum
mechanics, but in a geometrical formulation that includes also a particular
case of a family of nonlinear gauge transformations introduced by Doebner and
Goldin. The analysis is carried out for the case of discrete quantum mechanics.
The work presented here relies heavily on, and extends, previous work done in
collaboration with M. J. W. Hall.


title:
Cosmic shear full nulling: sorting out dynamics, geometry and
  systematics

abstract:
  An explicit full nulling scheme for cosmic shear observations is presented.
It makes possible the construction of shear maps from extended source
distributions for which the lens distance distribution is restricted to a
definite interval. Such a construction allows to build totally independent
shear maps, at all scales, that can be taken advantage of to constrain
background cosmological parameters and systematics using the full statistical
power of cosmic shear observations. Another advantage of such construction is
that, as the lens redshift distribution can be made arbitrarily narrow, scale
mixing due to projection effects can be limited allowing controlled predictions
on the large scale shear power spectrum from perturbation theory calculations.


title:
Effect of pairing correlations on nuclear low-energy structure: BCS and
  general Bogoliubov transformation

abstract:
  Low-lying nuclear states of Sm isotopes are studied in the framework of a
collective Hamiltonian based on covariant energy density functional theory.
Pairing correlation are treated by both BCS and Bogoliubov methods. It is found
that the pairing correlations deduced from relativistic Hartree-Bogoliubov
(RHB) calculations are generally stronger than those by relativistic mean-field
plus BCS (RMF+BCS) with same pairing force. By simply renormalizing the pairing
strength, the diagonal part of the pairing field is changed in such a way that
the essential effects of the off-diagonal parts of the pairing field neglected
in the RMF+BCS calculations can be recovered, and consequently the low-energy
structure is in a good agreement with the predictions of the RHB model.


title: Two isomorphism criteria for directed colimits

abstract:
  Using the general notions of finitely presentable and finitely generated
object introduced by Gabriel and Ulmer in 1971, we prove that, in any (locally
small) category, two sequences of finitely presentable objects and morphisms
(or two sequences of finitely generated objects and monomorphisms) have
isomorphic colimits (=direct limits) if, and only if, they are confluent. The
latter means that the two given sequences can be connected by a back-and-forth
chain of morphisms that is cofinal on each side, and commutes with the
sequences at each finite stage. In several concrete situations, analogous
isomorphism criteria are typically obtained by ad hoc arguments. The abstract
results given here can play the useful r\^ole of discerning the general from
the specific in situations of actual interest. We illustrate by applying them
to varieties of algebras, on the one hand, and to dimension groups---the
ordered $K_0$ of approximately finite-dimensional C*-algebras---on the other.
The first application encompasses such classical examples as Kurosh's
isomorphism criterion for countable torsion-free Abelian groups of finite rank.
The second application yields the Bratteli-Elliott Isomorphism Criterion for
dimension groups. Finally, we discuss Bratteli's original isomorphism criterion
for approximately finite-dimensional C*-algebras, and show that his result does
not follow from ours.


title:
Nanocomposite NiO:Au hydrogen sensors with high sensitivity and low
  operating temperature

abstract:
  We present results on the development of nanocomposite NiO:Au thin-film
hydrogen sensors, which are able to detect hydrogen concentrations as low as 2
ppm in air, operating at low temperatures in the range 125-150C. Thin NiO films
were sputter-deposited on oxidized silicon substrates. The structural,
morphological, and nanomechanical properties of the films were investigated
with respect to post-deposition annealing. Au nanoparticles were added on the
NiO surface via pulsed laser deposition and the films were tested as hydrogen
sensors before and after Au deposition. The performance of the NiO films as
hydrogen sensors improved significantly in the presence of Au nanoparticles on
the surface. The detection limit (lowest detectable hydrogen concentration)
decreased by two orders of magnitude, while the response time also decreased by
a factor of three.


title:
Nucleosynthesis of elements between Sr and Ag in neutron- and
  proton-rich neutrino-driven winds

abstract:
  Neutrino-driven winds that follow core collapse supernovae were thought to be
the site where half of the heavy elements are produced by the r-process.
Although recent hydrodynamic simulations show that the conditions in the wind
are not enough for the r-process, lighter heavy elements like Sr, Y, and Zr can
be produced. However, it is still not clear whether the conditions in the wind
are slightly neutron rich or proton rich. Here we investigate the
nucleosynthesis in neutrino-driven winds for both these conditions and
systematically explore the impact of wind parameters on abundances. Our results
show the difficulty of obtaining a robust abundance pattern in neutron-rich
winds where also an over production of Sr, Y, and Zr is likely. In proton-rich
conditions, the abundances smoothly change when varying wind parameters.
Constraints for wind parameters and neutrino energies and luminosities will
soon become available by combining nucleosynthesis studies, like the one
presented here, with new and future experimental data and observations.


title:
Cosmology with quantum matter and a classical gravitational field: the
  approach of configuration-space ensembles

abstract:
  I consider the formulation of hybrid cosmological models that consists of a
classical gravitational field interacting with a quantized massive scalar field
in the formalism of ensembles on configuration space. This is a viable approach
that provides an alternative to semiclassical gravity. I discuss a particular,
highly nonclassical solution in two approximations, minisuperspace and
spherically-symmetric midisuperspace. In both cases, the coupling of the
quantum scalar field and classical gravitational field leads to a cosmological
model which has a quantized radius of the universe.


title:
Lagrangian ADER-WENO Finite Volume Schemes on Unstructured Triangular
  Meshes Based On Genuinely Multidimensional HLL Riemann Solvers

abstract:
  In this paper we use the genuinely multidimensional HLL Riemann solvers
recently developed by Balsara et al. to construct a new class of
computationally efficient high order Lagrangian ADER-WENO one-step ALE finite
volume schemes on unstructured triangular meshes. A nonlinear WENO
reconstruction operator allows the algorithm to achieve high order of accuracy
in space, while high order of accuracy in time is obtained by the use of an
ADER time-stepping technique based on a local space-time Galerkin predictor.
The multidimensional HLL and HLLC Riemann solvers operate at each vertex of the
grid, considering the entire Voronoi neighborhood of each node and allows for
larger time steps than conventional one-dimensional Riemann solvers. The
results produced by the multidimensional Riemann solver are then used twice in
our one-step ALE algorithm: first, as a node solver that assigns a unique
velocity vector to each vertex, in order to preserve the continuity of the
computational mesh; second, as a building block for genuinely multidimensional
numerical flux evaluation that allows the scheme to run with larger time steps
compared to conventional finite volume schemes that use classical
one-dimensional Riemann solvers in normal direction. A rezoning step may be
necessary in order to overcome element overlapping or crossing-over. We apply
the method presented in this article to two systems of hyperbolic conservation
laws, namely the Euler equations of compressible gas dynamics and the equations
of ideal classical magneto-hydrodynamics (MHD). Convergence studies up to
fourth order of accuracy in space and time have been carried out. Several
numerical test problems have been solved to validate the new approach.


title:
A novel estimator of the polarization amplitude from normally
  distributed Stokes parameters

abstract:
  We propose a novel estimator of the polarization amplitude from a single
measurement of its normally distributed $(Q,U)$ Stokes components. Based on the
properties of the Rice distribution and dubbed 'MAS' (Modified ASymptotic), it
meets several desirable criteria:(i) its values lie in the whole positive
region; (ii) its distribution is continuous; (iii) it transforms smoothly with
the signal-to-noise ratio (SNR) from a Rayleigh-like shape to a Gaussian one;
(iv) it is unbiased and reaches its components' variance as soon as the SNR
exceeds 2; (v) it is analytic and can therefore be used on large data-sets. We
also revisit the construction of its associated confidence intervals and show
how the Feldman-Cousins prescription efficiently solves the issue of classical
intervals lying entirely in the unphysical negative domain. Such intervals can
be used to identify statistically significant polarized regions and conversely
build masks for polarization data. We then consider the case of a general
$[Q,U]$ covariance matrix and perform a generalization of the estimator that
preserves its asymptotic properties. We show that its bias does not depend on
the true polarization angle, and provide an analytic estimate of its variance.
The estimator value, together with its variance, provide a powerful
point-estimate of the true polarization amplitude that follows an unbiased
Gaussian distribution for a SNR as low as 2. These results can be applied to
the much more general case of transforming any normally distributed random
variable from Cartesian to polar coordinates.


title:
Development of a 30 cm-cube Electron-Tracking Compton Camera for the
  SMILE-II Experiment

abstract:
  To explore the sub-MeV/MeV gamma-ray window for astronomy, we have developed
the Electron-Tracking Compton Camera (ETCC), and carried out the first
performance test at room condition using several gamma-ray sources in the
sub-MeV energy band. Using a simple track analysis for a quick first test of
the performance, the gamma-ray imaging capability was demonstrated by clear
images and 5.3 degrees of angular resolution measure (ARM) measured at 662 keV.
As the greatest impact of this work, a gamma-ray detection efficiency on the
order of $10^{-4}$ was achieved at the sub-MeV gamma-ray band, which is one
order of magnitude higher than our previous experiment. This angular resolution
and detection efficiency enables us to detect the Crab Nebula at the 5 sigma
level with several hours observation at balloon altitude in middle latitude.
Furthermore, good consistency of efficiencies between this performance test and
simulation including only physical processes has a large importance; it means
we achieve nearly 100% detection of Compton recoil electrons. Thus, our
estimation of enhancements by upgrades of the detector is more dependable. We
are planning to confirm the imaging capability of the ETCC by observation of
celestial objects in the SMILE-II (Sub-MeV gamma ray Imaging Loaded-on-balloon
Experiment II). The SMILE-II and following SMILE-III project will be an
important key of sub-MeV/MeV gamma-ray astronomy.


title: On ordinarity and lifting fibrations on surfaces

abstract:
  We investigate the relation between the ordinarity of a surface and of its
Picard scheme in connection with the problem of lifting fibrations of genus g >
1 on surfaces to characteristic zero.


title: Influence of solar and cosmic-ray variability on climate

abstract:
  We analyze solar, geomagnetic and cosmic ray flux data along with rainfall
and temperature data for almost five solar cycles. We provide evidence of
significant influence of solar variability on climate. Specifically, we
demonstrate association between lower (higher) rainfall and higher (lower)
temperatures with increasing (decreasing) solar activity and decreasing
(increasing) cosmic ray intensities. We propose a plausible scenario that
accounts the results of our analysis.


title:
Modeling Limits in Hereditary Classes: Reduction and Application to
  Trees

abstract:
  Limits of graphs were initiated recently in the two extreme contexts of dense
and bounded degree graphs. This led to elegant limiting structures called
graphons and graphings. These approach have been unified and generalized by
authors in a more general setting using a combination of analytic tools and
model theory to FO-limits (and X-limits) and to the notion of modeling. The
existence of modeling limits was established for sequences in a bounded degree
class and, in addition, to the case of classes of trees with bounded height and
of graphs with bounded tree depth. These seemingly very special classes is in
fact a key step in the development of limits for more general situations. The
natural obstacle for the existence of modeling limit for a monotone class of
graphs is the nowhere dense property and it has been conjectured that this is a
sufficient condition. Extending earlier results we derive several general
results which present a realistic approach to this conjecture. As an example we
then prove that the class of all finite trees admits modeling limits.


title: Microturbulence in A/F Am/Fm stars

abstract:
  A programme to observe all A dwarfs in open clusters brighter than V=6.5 mag
of various ages and in the field was initiated several years ago. In this work
we present the current status of microturbulent velocity for A and F dwarfs. We
have performed high resolution high signal-to-noise spectroscopy of stars well
distributed in mass along the Main Sequence. Microturbulent velocities are
derived iteratively by fitting grids of synthetic spectra calculated in LTE to
observed spectra of 61 A field stars, 55 A and 58 F in open clusters (Pleiades,
Coma Berenices, Hyades and the Ursa Major moving group). We compared our
results to recent works and found a good agreement with their analytical
formulation for the standard microturbulence. Our results show a broad maximum
for microturbulent velocities in the range A5V to about A9V and a decrease (to
$\sim 1$ km/s) for cooler and hotter stars as indicated in Smalley (2004).We
also present a comparison to preliminary science results of Lobel et al. (2013)
for the Gaia-ESO Public Spectroscopic Survey.


title:
Characterization of wavelets and MRA wavelets on local fields of
  positive characteristic

abstract:
  We provide a characterization of wavelets on local fields of positive
characteristic based on results on affine and quasi affine frames. This result
generalizes the characterization of wavelets on Euclidean spaces by means of
two basic equations. We also give another characterization of wavelets.
Further, all wavelets which are associated with a multiresolution analysis on a
such a local field are also characterized.


title: A uniform controllability result for the Keller-Segel system

abstract:
  In this paper we study the controllability of the Keller-Segel system
approximating its parabolic-elliptic version. We show that this parabolic
system is locally uniform controllable around a constant solution of the
parabolic-elliptic system when the control is acting on the component of the
chemical.


title: Image of Abel-Jacobi map for hyperelliptic genus 3 and 4 curves

abstract:
  For the evaluation and inversion of abelian integrals we show that the image
of the Abel-Jacobi map of genus less than 5 hyperelliptic curve in its Jacobian
is the intersection of shifted theta divisors with specified shifts. Therefore
the image is a solution of a (slightly overdetermined) set of equations in the
Jacobian.


title: Fast Ion Surface Energy Loss and Straggling in the Surface Wake Fields

abstract:
  We have measured the stopping powers and straggling of fast, highly ionized
atoms passing through thin bilayer targets made up of metals and insulators. We
were surprised to find that the energy losses as well as the straggling depend
on the ordering of the target and have small but significantly different values
on bilayer reversal. We ascribe this newly found difference in energy loss to
the surface energy loss field effect due to the differing surface wake fields
as the beam exits the target in the two cases. This finding is validated with
experiments using several different projectiles, velocities, and bilayer
targets. Both partners of the diatomic molecular ions also display similar
results. A comparison of the energy loss results with those of previous
theoretical predictions for the surface wake potential for fast ions in solids
supports the existence of a self-wake.


title: Finite field-energy of a point charge in QED

abstract:
  We consider a simple nonlinear (quartic in the fields) gauge-invariant
modification of classical electrodynamics, which possesses a regularizing
ability sufficient to make the field energy of a point charge finite. The model
is exactly solved in the class of static central-symmetric electric fields.
Collation with quantum electrodynamics (QED) results in the total field energy
about twice the electron mass. The proof of the finiteness of the field energy
is extended to include any polynomial selfinteraction, thereby the one that
stems from the truncated expansion of the Euler-Heisenberg local Lagrangian in
QED in powers of the field strenth.


title: Off-mass-shell muon anomalous magnetic moment

abstract:
  Interaction of charged leptons with photons is considered for the case when
one of the lepton legs is off the mass shell. The effect due to off-mass-shell
shift in the anomalous magnetic moment is computed within one-loop
approximation. Possible contributions of this effect in the muon $g-2$
measurements are discussed.


title: Rheology of Weakly Vibrated Granular Media

abstract:
  We probe the rheology of weakly vibrated granular flows as function of flow
rate, vibration strength and pressure by performing experiments in a vertically
vibrated split-bottom shear cell. For slow flows, we establish the existence of
a novel vibration dominated granular flow regime, where the driving stresses
smoothly vanish as the driving rate is diminished. We distinguish three
qualitatively different vibration dominated rheologies, most strikingly a
regime where the shear stresses no longer are proportional to the pressure.


title: On a von Neumann algebra which is a complemented subspace

abstract:
  Let M be a von Neumann algebra of type II_1 which is also a complemented
subspace of B(H). We establish an algebraic criterion, which ensures that M is
an injective von Neumann algebra. As a corollary we show that if M is a
complemented factor of type II_1 on a Hilbert space H, then M is injective if
its fundamental group is non-trivial.


title: Consistency of weighted majority votes

abstract:
  We revisit the classical decision-theoretic problem of weighted expert voting
from a statistical learning perspective. In particular, we examine the
consistency (both asymptotic and finitary) of the optimal Nitzan-Paroush
weighted majority and related rules. In the case of known expert competence
levels, we give sharp error estimates for the optimal rule. When the competence
levels are unknown, they must be empirically estimated. We provide frequentist
and Bayesian analyses for this situation. Some of our proof techniques are
non-standard and may be of independent interest. The bounds we derive are
nearly optimal, and several challenging open problems are posed. Experimental
results are provided to illustrate the theory.


title:
The spatial coherence of weakly interacting one-dimensional
  non-equilibrium Bosonic quantum fluids

abstract:
  We present a theoretical analysis of spatial correlations in a
one-dimensional driven-dissipative non-equilibrium condensate. Starting from a
stochastic generalized Gross-Pitaevskii equation, we derive a noisy
Kuramoto-Sivashinsky equation for the phase dynamics. For sufficiently strong
interactions, the coherence decays exponentially in close analogy to the
equilibrium Bose gas. When interactions are small on a scale set by the
nonequilibrium condition, we find through numerical simulations a crossover
between a Gaussian and exponential decay with peculiar scaling of the coherence
length on the fluid density and noise strength.


title:
Comprehensive Border Bases for Zero Dimensional Parametric Polynomial
  Ideals

abstract:
  In this paper, we extend the idea of comprehensive Gr\"{o}bner bases given by
Weispfenning (1992) to border bases for zero dimensional parametric polynomial
ideals. For this, we introduce a notion of comprehensive border bases and
border system, and prove their existence even in the cases where they do not
correspond to any term order. We further present algorithms to compute
comprehensive border bases and border system. Finally, we study the relation
between comprehensive Gr\"{o}bner bases and comprehensive border bases w.r.t. a
term order and give an algorithm to compute such comprehensive border bases
from comprehensive Gr\"{o}bner bases.


title:
Mini-Proceedings of the 14th meeting of the Working Group on Rad.
  Corrections and MC Generators for Low Energies

abstract:
  The mini-proceedings of the 14th Meeting of the "Working Group on Rad.
Corrections and MC Generators for Low Energies" held in Frascati on September
13, 2013, as a satellite meeting of the PHIPSI13 conference in Rome, are
presented. These meetings, started in 2006, have as aim to bring together
experimentalists and theorists working in the fields of meson transition form
factors, hadronic contributions to (g-2)_\mu and the effective fine structure
constant, and development of MonteCarlo generators and Radiative Corrections
for precision e+e- and tau physics.


title: Radix Conversion for IEEE754-2008 Mixed Radix Floating-Point Arithmetic

abstract:
  Conversion between binary and decimal floating-point representations is
ubiquitous. Floating-point radix conversion means converting both the exponent
and the mantissa. We develop an atomic operation for FP radix conversion with
simple straight-line algorithm, suitable for hardware design. Exponent
conversion is performed with a small multiplication and a lookup table. It
yields the correct result without error. Mantissa conversion uses a few
multiplications and a small lookup table that is shared amongst all types of
conversions. The accuracy changes by adjusting the computing precision.


title:
A propeller scenario for the gamma-ray emission of low-mass X-ray
  binaries: The case of XSS J12270-4859

abstract:
  XSS J12270-4859 is the only low mass X-ray binary (LMXB) with a proposed
persistent gamma-ray counterpart in the Fermi-LAT domain, 2FGL 1227.7-4853.
Here, we present the results of the analysis of recent INTEGRAL observations,
aimed at assessing the long-term variability of the hard X-ray emission, and
thus the stability of the accretion state. We confirm that the source behaves
as a persistent hard X-ray emitter between 2003 and 2012. We propose that XSS
J12270-4859 hosts a neutron star in a propeller state, a state we investigate
in detail, developing a theoretical model to reproduce the associated X-ray and
gamma-ray properties. This model can be understood as being of a more general
nature, representing a viable alternative by which LMXBs can appear as
gamma-ray sources. In particular, this may apply to the case of millisecond
pulsars performing a transition from a state powered by the rotation of their
magnetic field, to a state powered by matter in-fall, such as that recently
observed from the transitional pulsar PSR J1023+0038. While the surface
magnetic field of a typical NS in a LMXB is lower by more than four orders of
magnitude than the much more intense fields of neutron stars accompanying
high-mass binaries, the radius at which the matter in-flow is truncated in a
NS-LMXB system is much lower. The magnetic field at the magnetospheric
interface is then orders of magnitude larger at this interface, and as
consequence, so is the power to accelerate electrons. We demonstrate that the
cooling of the accelerated electron population takes place mainly through
synchrotron interaction with the magnetic field permeating the interface, and
through inverse Compton losses due to the interaction between the electrons and
the synchrotron photons they emit. We found that self-synchrotron Compton
processes can explain the high energy phenomenology of XSS J12270-4859.


title: Physics Reach of Atmospheric Neutrino Measurements at PINGU

abstract:
  The sensitivity of a huge underground water/ice Cherenkov detector, such as
PINGU in IceCube, to the neutrino mass hierarchy, the atmospheric mixing angle
and its octant, is studied in detail. Based on the event rate decomposition in
the propagation basis, we illustrate the smearing effects from the neutrino
scattering, the visible energy and zenith angle reconstruction procedures, the
energy and angular resolutions, and the muon mis-identification rate, as well
as the impacts of systematic errors in the detector resolutions, the muon
mis-identification rate, and the overall normalization. The sensitivity,
especially the mass hierarchy sensitivity, can be enhanced by splitting the
muon-like events into two channels, according to the event inelasticity. We
also show that including the cascade events can improve and stabilize the
sensitivity of the measurements.


title:
Three-dimensional evolution of flux rope CMEs and its relation to the
  local orientation of the heliospheric current sheet

abstract:
  Flux ropes (FRs) ejected from the Sun may change their geometrical
orientation during their evolution which directly affects their
geoeffectiveness. Therefore, it is crucial to understand how solar FRs evolve
in the heliosphere to improve our space weather forecasting tools. We analyze
15 coronal mass ejections (CMEs), with clear FR signatures, observed during the
decay of Solar Cycle 23 and rise of Solar Cycle 24. We estimate initial
orientations of the FRs at the origin using extreme ultraviolet observations of
post-eruption arcades and/or eruptive prominences. Then we reconstruct
multiviewpoint coronagraph observations of the CMEs from ~2 to 30 Rs with a
three-dimensional geometric representation of a FR to determine their
geometrical parameters. Finally, we propagate the FRs from ~30 Rs to 1 AU
through MHD-simulated background solar wind while using in-situ measurements at
1 AU of the associated magnetic cloud as a constraint for the propagation
technique. These methodology allows us to estimate the FR orientation all the
way from the Sun to 1 AU. We find that while the FRs deflection occurs
predominantly below 30 Rs, a significant amount of deflection and rotation
happens between 30 Rs and 1 AU. We compare the FR orientation to the local
orientation of the heliospheric current sheet (HCS). We find that slow FRs tend
to align with the streams of slow solar wind in the inner heliosphere. During
the solar cycle minimum the slow solar wind channel as well as the HCS usually
occupy the area in the vicinity of the solar equatorial plane, which in the
past led researchers to the hypothesis that FRs align with the HCS. Our results
show that exclusions from this rule are explained by interaction with the
Parker-spiralled background magnetic field, which dominates over the magnetic
interaction with the HCS in the inner heliosphere at least during solar minimum
conditions.


title: A sup+Cinf inequality on domain of R^2

abstract: We give an inequality of type sup+Cinf in dimension 2.


title: A survey of infrared supernova remnants in the Large Magellanic Cloud

abstract:
  We present a comprehensive infrared study of supernova remnants (SNRs) in the
Large Magellanic Cloud (LMC) using near- to mid-infrared images taken by
Infrared Array Camera (IRAC; 3.6, 4.5, 5.8, and 8 {\mu}m) and Multiband Imaging
Photometer (MIPS; 24 and 70 {\mu}m) onboard the Spitzer Space Telescope. Among
the 47 bona fide LMC SNRs, 29 were detected in infrared, giving a high
detection rate of 62%. All 29 SNRs show emission at 24 {\mu}m, and 20 out of 29
show emission in one or several IRAC bands. We present their 4.5, 8, 24, and 70
{\mu}m images and a table summarizing their Spitzer fluxes. We find that the
LMC SNRs are considerably fainter than the Galactic SNRs, and that, among the
LMC SNRs, Type Ia SNRs are significantly fainter than core-collapse SNRs. We
conclude that the MIPS emission of essentially all SNRs origi- nates from dust
emission, whereas their IRAC emissions originate from ionic/molecular lines,
polycyclic aromatic hydrocarbons emission, or synchrotron emission. The
infrared fluxes show correlation with radio and X-ray fluxes. For SNRs that
have similar mor- phology in infrared and X-rays, the ratios of 24 to 70 {\mu}m
fluxes have good correlation with the electron density of hot plasma. The
overall correlation is explained well by the emission from collisionally-heated
silicate grains of 0.1 {\mu}m size, but for mature SNRs with relatively low gas
temperatures, the smaller-sized grain population is favored more. For those
that appear different between infrared and X-rays, the emission in the MIPS
bands is probably from dust heated by shock radiation.


title:
Abmash: Mashing Up Legacy Web Applications by Automated Imitation of
  Human Actions

abstract:
  Many business web-based applications do not offer applications programming
interfaces (APIs) to enable other applications to access their data and
functions in a programmatic manner. This makes their composition difficult (for
instance to synchronize data between two applications). To address this
challenge, this paper presents Abmash, an approach to facilitate the
integration of such legacy web applications by automatically imitating human
interactions with them. By automatically interacting with the graphical user
interface (GUI) of web applications, the system supports all forms of
integrations including bi-directional interactions and is able to interact with
AJAX-based applications. Furthermore, the integration programs are easy to
write since they deal with end-user, visual user-interface elements. The
integration code is simple enough to be called a "mashup".


title:
A Generic Position Based Method for Real Root Isolation of
  Zero-Dimensional Polynomial Systems

abstract:
  We improve the local generic position method for isolating the real roots of
a zero-dimensional bivariate polynomial system with two polynomials and extend
the method to general zero-dimensional polynomial systems. The method mainly
involves resultant computation and real root isolation of univariate polynomial
equations. The roots of the system have a linear univariate representation. The
complexity of the method is $\tilde{O}_B(N^{10})$ for the bivariate case, where
$N=\max(d,\tau)$, $d$ resp., $\tau$ is an upper bound on the degree, resp., the
maximal coefficient bitsize of the input polynomials. The algorithm is
certified with probability 1 in the multivariate case. The implementation shows
that the method is efficient, especially for bivariate polynomial systems.


title: AdS/CFT and Landau Fermi liquids

abstract:
  We study the field theory dual to a charged gravitational background in which
the low temperature entropy scales linearly with the temperature. We exhibit
the existence of a sound mode which is described by hydrodynamics, even at
energies much larger than the temperature, and explain how this, and other
properties of the field theory, are consistent with those of a
(3+1)-dimensional Landau Fermi liquid, finely tuned to the Pomeranchuk critical
point. We also discuss how one could engineer a higher-derivative gravitational
Lagrangian which reproduces the correct low temperature behavior of shear
viscosity in a generic Landau Fermi liquid.


title: A Mixed Parseval-Plancherel Formula

abstract:
  In this note, a general formula is proved. It expresses the integral on the
line of the product of a function $f$ and a periodic function $g$ in terms of
the Fourier transform of $f$ and the Fourier coefficients of $g$. This allows
the evaluation of some oscillatory integrals.


title: A pattern-driven approach to biomedical ontology engineering

abstract:
  Developing ontologies can be expensive, time-consuming, as well as difficult
to develop and maintain. This is especially true for more expressive and/or
larger ontologies. Some ontologies are, however, relatively repetitive, reusing
design patterns; building these with both generic and bespoke patterns should
reduce duplication and increase regularity which in turn should impact on the
cost of development.
  Here we report on the usage of patterns applied to two biomedical ontologies:
firstly a novel ontology for karyotypes which has been built ground-up using a
pattern based approach; and, secondly, our initial refactoring of the SIO
ontology to make explicit use of patterns at development time. To enable this,
we use the Tawny-OWL library which enables full-programmatic development of
ontologies. We show how this approach can generate large numbers of classes
from much simpler data structures which is highly beneficial within biomedical
ontology engineering.


title: Intensional Cyberforensics

abstract:
  This work focuses on the application of intensional logic to cyberforensic
analysis and its benefits and difficulties are compared with the
finite-state-automata approach. This work extends the use of the intensional
programming paradigm to the modeling and implementation of a cyberforensics
investigation process with backtracing of event reconstruction, in which
evidence is modeled by multidimensional hierarchical contexts, and proofs or
disproofs of claims are undertaken in an eductive manner of evaluation. This
approach is a practical, context-aware improvement over the finite state
automata (FSA) approach we have seen in previous work. As a base implementation
language model, we use in this approach a new dialect of the Lucid programming
language, called Forensic Lucid, and we focus on defining hierarchical contexts
based on intensional logic for the distributed evaluation of cyberforensic
expressions. We also augment the work with credibility factors surrounding
digital evidence and witness accounts, which have not been previously modeled.
The Forensic Lucid programming language, used for this intensional
cyberforensic analysis, formally presented through its syntax and operational
semantics. In large part, the language is based on its predecessor and
codecessor Lucid dialects, such as GIPL, Indexical Lucid, Lucx, Objective
Lucid, and JOOIP bound by the underlying intensional programming paradigm.


title: A Topological Spin Chern Pump

abstract:
  We propose a one-dimensional electron model with parameters modulated
adiabatically in closed cycles, which can continuously pump spin to leads. By
defining the spin-polarized Wannier functions, we show that the spin pump is
protected by the spin Chern numbers, so that it is stable to perturbations
violating the time-reversal symmetry and spin conservation. Our work
demonstrates the possibility and principle to realize topological spin pumps
independent of any symmetries, and also suggests a possible way to
experimentally observe the bulk topological invariants.


title:
Effect of disorder geometry on the critical force in disordered elastic
  systems

abstract:
  We address the effect of disorder geometry on the critical force in
disordered elastic systems. We focus on the model system of a long-range
elastic line driven in a random landscape. In the collective pinning regime, we
compute the critical force perturbatively. Not only our expression for the
critical force confirms previous results on its scaling with respect to the
microscopic disorder parameters, it also provides its precise dependence on the
disorder geometry (represented by the disorder two-point correlation function).
Our results are successfully compared to the results of numerical simulations
for random field and random bond disorders.


title: Explicit Barenblatt Profiles for Fractional Porous Medium Equations

abstract:
  Several one-parameter families of explicit self-similar solutions are
constructed for the porous medium equations with fractional operators. The
corresponding self-similar profiles, also called \emph{Barenblatt profiles},
have the same forms as those of the classic porous medium equations. These new
exact solutions complement current theoretical analysis of the underlying
equations and are expected to provide insights for further quantitative
investigations.


title:
Isomorphic induced modules and Dynkin diagram automorphisms of
  semisimple Lie algebras

abstract:
  Consider a simple Lie algebra $\mathfrak{g}$ and $\overline{\mathfrak{g}}%
\subset \mathfrak{g}$ a Levi subalgebra. Two irreducible $\overline{%
\mathfrak{g}}$-modules yield isomorphic inductions to $\mathfrak{g}$ when their
highest weights coincide up to conjugation by an element of the Weyl group $W$
of $\mathfrak{g}$ which is also a Dynkin diagram automorphism of $%
\overline{\mathfrak{g}}$. In this paper we study the converse problem: given
two irreducible $\overline{\mathfrak{g}}$-modules of highest weight $\mu $ and
$\nu $ whose inductions to $\mathfrak{g}$ are isomorphic, can we conclude that
$\mu $ and $\nu $ are conjugate under the action of an element of $W$ which is
also a Dynkin diagram automorphism of $\overline{\mathfrak{g}% }$ ? We
conjecture this is true in general. We prove this conjecture in type $A$ and,
for the other root systems, in various situations providing $\mu $ and $\nu $
satisfy additional hypotheses. Our result can be interpreted as an analogue for
branching coefficient of the main result of \cite{Raj} on tensor product
multiplicities.


title:
Spectra of some invertible weighted composition operators on Hardy and
  weighted Bergman spaces in the unit ball

abstract:
  In this paper, we investigate the spectra of invertible weighted composition
operators with automorphism symbols, on Hardy space $H^2(\mathbb{B}_N)$ and
weighted Bergman spaces $A_\alpha^2(\mathbb{B}_N)$, where $\mathbb{B}_N$ is the
unit ball of the $N$-dimensional complex space. By taking $N=1$,
$\mathbb{B}_N=\mathbb{D}$ the unit disc, we also complete the discussion about
the spectrum of a weighted composition operator when it is invertible on
$H^2(\mathbb{D})$ or $A_\alpha^2(\mathbb{D})$.


title: Solar-motion correction in early extragalactic astrophysics

abstract:
  Redshift observations of galaxies outside the Local Group are fairly common
in extragalactic astrophysics. If redshifts are interpreted as arising from
radial velocities, these must be corrected by the contamination of the solar
motion. We discuss the details of such correction in the way it was performed
by the American astronomer Edwin Hubble in his 1929 seminal paper. The
investigations of spiral nebulae undertaken by the Swedish astronomer Knut
Lundmark, in 1924, are also considered in this context.


title:
General solution for quantitative dark-field contrast imaging with
  grating interferometers

abstract:
  Dark-field contrast imaging with grating interferometers has proven to hold
huge potential for numerous applications with X-rays and with neutrons
conveying biology and medicine as well as engineering and magnetism,
respectively. However, a concept to extract quantitative information is still
missing. Here a general theory as well as a measurement strategy is introduced,
allowing extraction of quantitative small-angle scattering information such as
structure sizes and scattering cross sections. The validity of the description
is demonstrated by a specific example from literature.


title: The rise and fall of the fourth quark-lepton generation

abstract:
  The existence of the fourth quark-lepton generation is not excluded by the
electroweak precision data. However, the recent results on the 126 GeV higgs
boson production and decay do not allow an extra generation at least as far as
the perturbation theory can be used.


title: Hamiltonian operators of Dubrovin-Novikov type in 2D

abstract:
  First order Hamiltonian operators of differential-geometric type were
introduced by Dubrovin and Novikov in 1983, and thoroughly investigated by
Mokhov. In 2D, they are generated by a pair of compatible flat metrics $g$ and
$\tilde g$ which satisfy a set of additional constraints coming from the
skew-symmetry condition and the Jacobi identity. We demonstrate that these
constraints are equivalent to the requirement that $\tilde g$ is a linear
Killing tensor of $g$ with zero Nijenhuis torsion. This allowed us to obtain a
complete classification of $n$-component operators with $n\leq 4$ (for $n=1, 2$
this was done before). For 2D operators the Darboux theorem does not hold: the
operator may not be reducible to constant coefficient form. All interesting
(non-constant) examples correspond to the case when the flat pencil $g, \tilde
g$ is not semisimple, that is, the affinor $\tilde g g^{-1}$ has non-trivial
Jordan block structure. In the case of a direct sum of Jordan blocks with
distinct eigenvalues we obtain a complete classification of Hamiltonian
operators for any number of components $n$, revealing a remarkable
correspondence with the class of trivial Frobenius manifolds modelled on
$H^*(CP^{n-1})$.


title: The Ekedahl Invariants for finite groups

abstract:
  In 2009 Ekedahl introduced certain cohomological invariants of finite groups
which are naturally related to the Noether Problem. We show that these
invariants are trivial for every finite group in GL_3(k) and for the fifth
discrete Heisenberg group H_5. Moreover in the case of finite linear groups
with abelian projective reduction, these invariants satisfy a recurrence
relation in a certain Grothendieck group for abelian groups.


title: Non-degenerate light quark masses from 2+1f lattice QCD+QED

abstract:
  We report on a calculation of the effects of isospin breaking in Lattice
QCD+QED. This involves using Chiral Perturbation Theory with Electromagnetic
corrections to find the renormalized, non-degenerate, light quark masses. The
calculations are carried out on QCD ensembles generated by the RBC and UKQCD
collaborations using Domain Wall Fermions and the Iwasaki and Iwasaki+DSDR
Gauge Actions with unitary pion masses down to 170 MeV. Non-compact QED is
treated in the quenched approximation. The simulations use a $32^3$ lattice
size with $a^{-1}=2.28(3)$ GeV (Iwasaki) and 1.37(1) (Iwasaki+DSDR). This
builds on previous work from the RBC/UKQCD collaboration with lattice spacing
$a^{-1}=1.78(4)$ GeV.


title: No-Core Shell Model for Nuclear Systems with Strangeness

abstract:
  We report on a novel ab initio approach for nuclear few- and many-body
systems with strangeness. Recently, we developed a relevant no-core shell model
technique which we successfully applied in first calculations of lightest
$\Lambda$ hypernuclei. The use of a translationally invariant finite harmonic
oscillator basis allows us to employ large model spaces, compared to
traditional shell model calculations, and use realistic nucleon-nucleon and
nucleon-hyperon interactions (such as those derived from EFT). We discuss
formal aspects of the methodology, show first demonstrative results for
${}_{\Lambda}^3$H, ${}_{\Lambda}^4$H and ${}^4_\Lambda$He, and give outlook.


title: The strength of beta-decays to the continuum

abstract:
  The beta-strength in beta-delayed particle decays has up to now been defined
in a somewhat ad hoc manner that depends on the decay mechanism. A simple,
consistent definition is presented that fulfils the beta strength sum rules.
Special consideration is given to the modifications needed when employing
R-matrix fits to data. As an example the 11Be(beta-p) decay is investigated
through simple models.


title: Intersection Theory on Linear Subvarieties of Toric Varieties

abstract:
  We give a complete description of the cohomology ring $A^*(\overline Z)$ of a
compactification of a linear subvariety $Z$ of a torus in a smooth toric
variety whose fan $\Sigma$ is supported on the tropicalization of $Z$. It turns
out that cocycles on $\overline Z$ canonically correspond to Minkowski weights
on $\Sigma$ and that the cup product is described by the intersection product
on the tropical matroid variety $\operatorname{Trop}(Z)$.


title:
High-Tc Superconductivity near the Anion Height Instability in Fe-based
  Superconductors: Analysis of LaFeAsO$_{1-x}$H$_x$

abstract:
  The isostructural transition in the tetragonal phase, with sizable change in
the anion-height, is realized in heavily H-doped LaFeAsO and (La,P) co-doped
CaFe$_2$As$_2$. In these compounds, the superconductivity with higher-Tc (40~50
K) is realized near the isostructural transition. To reveal the origin of the
anion-height instability and its important role in realizing the higher-Tc
state, we develop the orbital-spin fluctuation theory by including the vertex
correction. It is found that the non-nematic orbital fluctuations, which induce
the anion-height instability, can develop near the magnetic quantum critical
point, in addition to the conventional nematic orbital fluctuations. The
non-nematic orbital order triggers the isostructural transition, and its
fluctuation would be a key ingredient to realize higher-Tc superconductivity of
order 50 K.


title: Learning Semantic Representations for the Phrase Translation Model

abstract:
  This paper presents a novel semantic-based phrase translation model. A pair
of source and target phrases are projected into continuous-valued vector
representations in a low-dimensional latent semantic space, where their
translation score is computed by the distance between the pair in this new
space. The projection is performed by a multi-layer neural network whose
weights are learned on parallel training data. The learning is aimed to
directly optimize the quality of end-to-end machine translation results.
Experimental evaluation has been performed on two Europarl translation tasks,
English-French and German-English. The results show that the new semantic-based
phrase translation model significantly improves the performance of a
state-of-the-art phrase-based statistical machine translation sys-tem, leading
to a gain of 0.7-1.0 BLEU points.


title: Impact of storm risk on Faustmann rotation

abstract:
  Global warming may induce in Western Europe an increase in storms. Hence the
forest managers will have to take into account the risk increase. We study the
impact of storm risk at the stand level. From the analytical expressions of the
Faustmann criterion and the Expected Long-Run Average Yield, we deduce in
presence of storm risk the influence of criteria and of discount rate in terms
of optimal thinnings and cutting age. We discuss the validity of using a risk
adjusted discount rate (a rate of storm risk added to the discount rate)
without risk to mimic the storm risk case in terms of optimal thinnings.


title: Adaptive Crouzeix-Raviart Boundary Element Method

abstract:
  For the non-conforming Crouzeix-Raviart boundary elements from [Heuer, Sayas:
Crouzeix-Raviart boundary elements, Numer. Math. 112, 2009], we develop and
analyze a posteriori error estimators based on the $h-h/2$ methodology. We
discuss the optimal rate of convergence for uniform mesh refinement, and
present a numerical experiment with singular data where our adaptive algorithm
recovers the optimal rate while uniform mesh refinement is sub-optimal. We also
discuss the case of reduced regularity by standard geometric singularities to
conjecture that, in this situation, non-uniformly refined meshes are not
superior to quasi-uniform meshes for Crouzeix-Raviart boundary elements.


title:
Precise Semidefinite Programming Formulation of Atomic Norm Minimization
  for Recovering d-Dimensional ($d\geq 2$) Off-the-Grid Frequencies

abstract:
  Recent research in off-the-grid compressed sensing (CS) has demonstrated
that, under certain conditions, one can successfully recover a spectrally
sparse signal from a few time-domain samples even though the dictionary is
continuous. In particular, atomic norm minimization was proposed in
\cite{tang2012csotg} to recover $1$-dimensional spectrally sparse signal.
However, in spite of existing research efforts \cite{chi2013compressive}, it
was still an open problem how to formulate an equivalent positive semidefinite
program for atomic norm minimization in recovering signals with $d$-dimensional
($d\geq 2$) off-the-grid frequencies. In this paper, we settle this problem by
proposing equivalent semidefinite programming formulations of atomic norm
minimization to recover signals with $d$-dimensional ($d\geq 2$) off-the-grid
frequencies.


title:
The dimension of affine Deligne-Lusztig varieties in the affine
  Grassmannian of unramified groups

abstract:
  In this paper we calculate the dimension of affine Deligne-Lusztig varieties
in the affine Grassmannian of unramified groups. We also examine the
irreducible components of ADLVs in the superbasic case and the $J_b(F)$-action
on them.


title: Comparison of photometric variability before and after stellar flares

abstract:
  The energy in the solar acoustic spectrum is known to be correlated with
flares, but it is not known if the same is true for stellar flares? In order to
answer this question, we have analyzed 73 flares in 39 solar-like stars. These
flares were identified in the 854 solar-like stars observed by the Kepler
spacecraft that have stellar parameters measured with asteroseismology. Though
we were not able to identify a statistically significant enhancement of the
energy in the high-frequency part of the post-flare acoustic spectra compared
to the pre-flare spectra of these stars, we did identify a larger variability
between the energy in the high-frequency part of the post- and pre-flare
acoustic spectra compared to spectra taken at random times.


title: Numerical studies of Minimally Doubled Fermions

abstract:
  We have performed the first numerical study of minimally doubled fermions of
the Karsten-Wilczek class in the quenched approximation. This requires fixing
the counterterms, which arise due to hypercubic symmetry breaking induced by
the Karsten-Wilczek term. Non-perturbative renormalisation criteria are
formulated after a detailed study of the parameter dependence of mesonic
observables. Minimisation of the mass anisotropy of the pseudoscalar ground
state fixes non-perturbative renormalisation conditions for the counterterm
coefficients. These anisotropies are mapped out by probing different euclidean
components of the transfer matrix through calculations of the pseudoscalar
ground state mass in different directions. The chiral behaviour of the
pseudoscalar ground state is studied with the tuned Karsten-Wilczek action for
multiple lattice spacings. Light pseudoscalar masses ($ M_{PS} \lesssim
250\,MeV $) were achieved in the quenched approximation without encountering
exceptional configurations. The presence of quenched chiral logarithms is
studied under the tentative assumption of Goldstone Boson-like behaviour.


title: Capacity Based Evacuation with Dynamic Exit Signs

abstract:
  Exit paths in buildings are designed to minimise evacuation time when the
building is at full capacity. We present an evacuation support system which
does this regardless of the number of evacuees. The core concept is to even-out
congestion in the building by diverting evacuees to less-congested paths in
order to make maximal usage of all accessible routes throughout the entire
evacuation process. The system issues a set of flow-optimal routes using a
capacity-constrained routing algorithm which anticipates evolutions in path
metrics using the concept of "future capacity reservation". In order to direct
evacuees in an intuitive manner whilst implementing the routing algorithm's
scheme, we use dynamic exit signs, i.e. whose pointing direction can be
controlled. To make this system practical and minimise reliance on sensors
during the evacuation, we use an evacuee mobility model and make several
assumptions on the characteristics of the evacuee flow. We validate this
concept using simulations, and show how the underpinning assumptions may limit
the system's performance, especially in low-headcount evacuations.


title:
The geometry of Newton strata in the reduction modulo $p$ of Shimura
  varieties of PEL type

abstract:
  In this paper we study the Newton stratification on the reduction of Shimura
varieties of PEL type with hyperspecial level structure and the Newton
stratification on the deformation space of a Barsotti-Tate group with PEL
structure. Our main result is a formula for the dimension of Newton strata and
the description their closure in each of the two cases. Furthermore, we
calculate the dimension of some Rapoport-Zink spaces as an intermediate result.


title: Small dynamical heights for quadratic polynomials and rational functions

abstract:
  Let $f \in Q(z)$ be a polynomial or rational function of degree 2. A special
case of Morton and Silverman's Dynamical Uniform Boundedness Conjecture states
that the number of rational preperiodic points of $f$ is bounded above by an
absolute constant. A related conjecture of Silverman states that the canonical
height $\hat{h}_f(x)$ of a non-preperiodic rational point $x$ is bounded below
by a uniform multiple of the height of $f$ itself. We provide support for these
conjectures by computing the set of preperiodic and small height rational
points for a set of degree 2 maps far beyond the range of previous searches.


title: Chiral condensate and the structure of hadrons

abstract:
  A model of hadron masses based on the quark structure of hadrons combined
with effects of chiral dynamics is used to calculate the 2+1 flavour chiral
condensate in the hadron resonance gas framework. Results are discussed in the
context of recent lattice QCD data. Improvements of the dynamical models of
hadron structure are suggested with the aim to estimate the strange sigma term
of the nucleon.


title:
Bidirectional Recursive Neural Networks for Token-Level Labeling with
  Structure

abstract:
  Recently, deep architectures, such as recurrent and recursive neural networks
have been successfully applied to various natural language processing tasks.
Inspired by bidirectional recurrent neural networks which use representations
that summarize the past and future around an instance, we propose a novel
architecture that aims to capture the structural information around an input,
and use it to label instances. We apply our method to the task of opinion
expression extraction, where we employ the binary parse tree of a sentence as
the structure, and word vector representations as the initial representation of
a single token. We conduct preliminary experiments to investigate its
performance and compare it to the sequential approach.


title:
Backreaction and continuum limit in a closed universe filled with black
  holes

abstract:
  We discuss the continuum limit of the initial data for a vacuum, closed
cosmological model with black holes as the only sources of the gravitational
field. The model we consider is an exact solution of the constraint equations
and represents a vacuum universe with a number of black holes placed on a
spatial slice of $S^3$ topology considered at the moment of its largest
expansion when the black holes are momentary at rest. We explain how and under
what conditions the FLRW metric arises as the continuum limit when the number
of black holes contained in the model goes to infinity. We also dicuss the
relation between the effective cosmological parameters of the model, inferred
from the large scale geometry of the spacetime, and the masses of individual
black holes. In particular, we prove an estimate for the difference between the
total effective mass of the system and the sum of the masses of all black
holes, thus quantifying the effects of the inhomogeneities in the matter
distribution or the cosmological backreaction.


title: Comments on Coulomb pairing in aromatic hydrocarbons

abstract:
  Recently reported anomalies in the double-photonionization spectra of
aromatic molecules such as benzene, naphthalene, anthracene and coronene are
attributed to Coulomb-pair resonances of pi electrons.


title:
Verifying whether One-Tape Non-Deterministic Turing Machines Run in Time
  $Cn+D$

abstract:
  We discuss the following family of problems, parameterized by integers $C\geq
2$ and $D\geq 1$: Does a given one-tape non-deterministic $q$-state Turing
machine make at most $Cn+D$ steps on all computations on all inputs of length
$n$, for all $n$?
  Assuming a fixed tape and input alphabet, we show that these problems are
co-NP-complete and we provide good non-deterministic and co-non-deterministic
lower bounds. Specifically, these problems can not be solved in
$o(q^{(C-1)/4})$ non-deterministic time by multi-tape Turing machines. We also
show that the complements of these problems can be solved in $O(q^{C+2})$
non-deterministic time and not in $o(q^{(C-1)/2})$ non-deterministic time by
multi-tape Turing machines.


title:
Property-Testing in Sparse Directed Graphs: 3-Star-Freeness and
  Connectivity

abstract:
  We study property testing in directed graphs in the bounded degree model,
where we assume that an algorithm may only query the outgoing edges of a
vertex, a model proposed by Bender and Ron in 2002. As our first main result,
we we present a property testing algorithm for strong connectivity in this
model, having a query complexity of $\mathcal{O}(n^{1-\epsilon/(3+\alpha)})$
for arbitrary $\alpha>0$; it is based on a reduction to estimating the vertex
indegree distribution. For subgraph-freeness we give a property testing
algorithm with a query complexity of $\mathcal{O}(n^{1-1/k})$, where $k$ is the
number of connected componentes in the queried subgraph which have no incoming
edge. We furthermore take a look at the problem of testing whether a weakly
connected graph contains vertices with a degree of least $3$, which can be
viewed as testing for freeness of all orientations of $3$-stars; as our second
main result, we show that this property can be tested with a query complexity
of $\mathcal{O}(\sqrt{n})$ instead of, what would be expected,
$\Omega(n^{2/3})$.


title: In situ imaging of atomic quantum gases

abstract:
  One exciting progress in recent cold atom experiments is the development of
high resolution, in situ imaging techniques for atomic quantum gases [1-3].
These new powerful tools provide detailed information on the distribution of
atoms in a trap with resolution approaching the level of single atom and even
single lattice site, and complement the well developed time-of-flight method
that probes the system in momentum space. In a condensed matter analogy, this
technique is equivalent to locating electrons of a material in a snap shot. In
situ imaging has offered a new powerful tool to study atomic gases and inspired
many new research directions and ideas. In this chapter, we will describe the
experimental setup of in situ absorption imaging, observables that can be
extracted from the images, and new physics that can be explored with this
technique.


title: Cache policies for cloud-based systems: To keep or not to keep

abstract:
  In this paper, we study cache policies for cloud-based caching. Cloud-based
caching uses cloud storage services such as Amazon S3 as a cache for data items
that would have been recomputed otherwise. Cloud-based caching departs from
classical caching: cloud resources are potentially infinite and only paid when
used, while classical caching relies on a fixed storage capacity and its main
monetary cost comes from the initial investment. To deal with this new context,
we design and evaluate a new caching policy that minimizes the overall cost of
a cloud-based system. The policy takes into account the frequency of
consumption of an item and the cloud cost model. We show that this policy is
easier to operate, that it scales with the demand and that it outperforms
classical policies managing a fixed capacity.


title:
Near-field interferometry of a free-falling nanoparticle from a
  point-like source

abstract:
  Matter-wave interferometry performed with massive objects elucidates their
wave nature and thus tests the quantum superposition principle at large scales.
Whereas standard quantum theory places no limit on particle size, alternative,
yet untested theories---conceived to explain the apparent quantum to classical
transition---forbid macroscopic superpositions. Here we propose an
interferometer with a levitated, optically cooled, and then free-falling
silicon nanoparticle in the mass range of one million atomic mass units,
delocalized over more than 150 nm. The scheme employs the near-field Talbot
effect with a single standing-wave laser pulse as a phase grating. Our
analysis, which accounts for all relevant sources of decoherence, indicates
that this is a viable route towards macroscopic high-mass superpositions using
available technology.


title: Cyclic branched covers of knots as links of real isolated singularities

abstract:
  Given a real analytic function $f$ from $\mathbb{R}^4$ to $\mathbb{R}^2$ with
isolated critical point at the origin, the link $L_f$ of the singularity is a
real fibred knot in $\mathbb{S}^{3}$. From this singularities, we construct a
family of real isolated suspension singularities from $\mathbb{R}^6$ to
$\mathbb{R}^2$ such that its links are the total spaces of the $n$-branched
cyclic coverings over the corresponding knots. In this way we obtain as links
of singularities, $3$-manifolds that does not appear in the complex case, such
as hyperbolic $3$-manifolds or the Hantzsche-Wendt manifold.


title: On the two-point function of general planar maps and hypermaps

abstract:
  We consider the problem of computing the distance-dependent two-point
function of general planar maps and hypermaps, i.e. the problem of counting
such maps with two marked points at a prescribed distance. The maps considered
here may have faces of arbitrarily large degree, which requires new bijections
to be tackled. We obtain exact expressions for the following cases: general and
bipartite maps counted by their number of edges, 3-hypermaps and
3-constellations counted by their number of dark faces, and finally general and
bipartite maps counted by both their number of edges and their number of faces.


title: Perfect routing of quantum information in regular cavity QED networks

abstract:
  We introduce a scheme for perfect routing of quantum states and entanglement
in regular cavity QED networks. The couplings between the cavities are
quasi-uniform and each cavity is doped with a two-level atom. Quasi-uniform
couplings leads the system to evolve in invariant subspaces. Combination the
evolutions of the system in its invariant subspaces with quite simple local
operations on atoms in the networks, gives the perfect routing of quantum
states and entanglement through the network. To provide the protocol be robust
due to decoherence arisen from photon loss, the field mode of the cavities are
only virtually excited.


title:
Relationship Between the Kinetic Power and Bolometric Luminosity of
  Jets: limitation from black hole X-ray binaries, active galactic nuclei, and
  gamma-ray bursts

abstract:
  The correlation between the kinetic power $P_{\rm jet}$ and intrinsic
bolometric luminosity $L_{\rm jet}$ of jets may reveal the underlying jet
physics in various black hole systems. Based on the recent work by Nemmen et
al. (2012), we re-investigate this correlation with additional sources of
black-hole X-ray binaries (BXBs) in hard/quiescent states and low-luminosity
active galactic nuclei (LLAGNs). The new sample includes 29 sets of data from 7
BXBs and 20 LLAGNs, with $P_{\rm jet}$ and $L_{\rm jet}$ being derived from
spectral modeling of the quasi-simultaneous multi-band spectra under the
accretion-jet scenario. Compared to previous works, the range of luminosity is
now enlarged to more than $20$ decades, i.e. from $10^{31}{\rm erg/s}$ to
$10^{52}{\rm erg/s}$, which allows for better constraining of the correlation.
One notable result is that the jets in BXBs and LLAGNs almost follow the same
$P_{\rm jet} - L_{\rm jet}$ correlation that was obtained from blazars and
gamma-ray bursts (GRBs). The slope indices we derived are $1.03\pm0.01$ for the
whole sample, $0.85\pm0.06$ for BXB subsample, $0.71\pm0.11$ for LLAGN
subsample, and $1.01\pm0.05$ for the LLAGN-blazar subsample, respectively. The
correlation index around unit implies the independence of jet efficiency on the
luminosity or kinetic power. Our results may further support the hypothesis
that similar physical processes exist in the jets of various black hole
systems.


title:
Critical temperature and superfluid gap of the Unitary Fermi Gas from
  Functional Renormalization

abstract:
  We investigate the superfluid transition of the Unitary Fermi Gas by means of
the Functional Renormalization Group, aiming at quantitative precision. We
extract $T_{\rm c}/\mu=0.38(2)$ and $\Delta/\mu=1.04(15)$ for the critical
temperature and the superfluid gap at zero temperature, respectively, within a
systematic improvement of the truncation for the effective average action. The
key new ingredient in comparison to previous approaches consists in the use of
regulators which cut off both frequencies and momenta. We incorporate
renormalization effects on both the bosonic and the fermionic propagator,
include higher order bosonic scattering processes, and investigate the
regulator and specification parameter dependence for an error estimate. The
ratio $\Delta/T_{\rm c}=2.7(3)$ becomes less sensitive to the relative cutoff
scale of bosons and fermions when improving the truncation. The techniques
developed in this work are easily carried over to the cases of finite
scattering length, lower dimensionality, and spin-imbalance.


title:
The impact of systemic risk on the diversification benefits of a risk
  portfolio

abstract:
  Risk diversification is the basis of insurance and investment. It is thus
crucial to study the effects that could limit it. One of them is the existence
of systemic risk that affects all the policies at the same time. We introduce
here a probabilistic approach to examine the consequences of its presence on
the risk loading of the premium of a portfolio of insurance policies. This
approach could be easily generalized for investment risk. We see that, even
with a small probability of occurrence, systemic risk can reduce dramatically
the diversification benefits. It is clearly revealed via a non-diversifiable
term that appears in the analytical expression of the variance of our models.
We propose two ways of introducing it and discuss their advantages and
limitations. By using both VaR and TVaR to compute the loading, we see that
only the latter captures the full effect of systemic risk when its probability
to occur is low


title: The nuclear dimension of graph C*-algebras

abstract:
  Consider a graph C*-algebra C*(E) with a purely infinite ideal I (possibly
all of C*(E)) such that I has only finitely many ideals and C*(E)/I is
approximately finite dimensional. We prove that the nuclear dimension of C*(E)
is 1. If I has infinitely many ideals, then the nuclear dimension of C*(E) is
either 1 or 2.


title:
XMM-Newton observations of the low-luminosity cataclysmic variable V405
  Pegasi

abstract:
  V405 Peg is a low-luminosity cataclysmic variable (CV) that was identified as
the optical counterpart of the bright, high-latitude ROSAT all-sky survey
source RBS1955. The system was suspected to belong to a largely undiscovered
population of hibernating CVs. Despite intensive optical follow-up its subclass
however remained undetermined.
  We want to further classify V405 Peg and understand its role in the CV zoo
via its long-term behaviour, spectral properties, energy distribution and
accretion luminosity.
  We perform a spectral and timing analysis of \textit{XMM-Newton} X-ray and
ultra-violet data. Archival WISE, HST, and Swift observations are used to
determine the spectral energy distribution and characterize the long-term
variability.
  The X-ray spectrum is characterized by emission from a multi-temperature
plasma. No evidence for a luminous soft X-ray component was found. Orbital
phase-dependent X-ray photometric variability by $\sim50\%$ occurred without
significant spectral changes. No further periodicity was significant in our
X-ray data. The average X-ray luminosity during the XMM-Newton observations was
L_X, bol simeq 5e30 erg/s but, based on the Swift observations, the
corresponding luminosity varied between 5e29 erg/s and 2e31 erg/son timescales
of years.
  The CV subclass of this object remains elusive. The spectral and timing
properties show commonalities with both classes of magnetic and non-magnetic
CVs. The accretion luminosity is far below than that expected for a standard
accreting CV at the given orbital period. Objects like V405 Peg might represent
the tip of an iceberg and thus may be important contributors to the Galactic
Ridge X-ray Emission. If so they will be uncovered by future X-ray surveys,
e.g. with eROSITA.


title: Uncertainties in Solar Synoptic Magnetic Flux Maps

abstract:
  Magnetic flux synoptic charts are critical for reliable modeling of the
corona and heliosphere. Until now, however, these charts were provided without
any estimate of uncertainties. The uncertainties are due to instrumental noise
in the measurements and to the spatial variance of the magnetic flux
distribution that contributes to each bin in the synoptic chart. We describe
here a simple method to compute synoptic magnetic flux maps and their
corresponding magnetic flux spatial variance charts that can be used to
estimate the uncertainty in the results of coronal models. We have tested this
approach by computing a potential-field-source-surface model of the coronal
field for a Monte Carlo simulation of Carrington synoptic magnetic flux maps
generated from the variance map. We show that these uncertainties affect both
the locations of source-surface neutral lines and the distributions of coronal
holes in the models.


title:
Fault Tolerance of Small-World Regular and Stochastic Interconnection
  Networks

abstract:
  Resilience of the most important properties of stochastic and regular
(deterministic) small-world interconnection networks is studied. It is shown
that in the broad range of values of the fraction of faulty nodes the networks
under consideration possess high fault tolerance, the deterministic networks
being slightly better than the stochastic ones.


title:
Discovery of secular variations in the atmospheric abundances of
  magnetic Ap stars

abstract:
  The stars of the middle main sequence have relatively quiescent outer layers,
and unusual chemical abundance patterns may develop in their atmospheres. The
presence of chemical peculiarities reveal the action of such subsurface
phenomena as gravitational settling and radiatively driven levitation of trace
elements, and their competition with mixing processes such as turbulent
diffusion.
  We want to establish whether abundance peculiarities change as stars evolve
on the main sequence, and provide observational constraints to diffusion
theory.
  We have performed spectral analysis of 15 magnetic Bp stars that are members
of open clusters (and thus have well-known ages), with masses between about 3
and 4 M_sun. For each star, we measured the abundances of He, O, Mg, Si, Ti,
Cr, Fe, Pr and Nd.
  We have discovered the systematic time evolution of trace elements through
the main-sequence lifetime of magnetic chemically peculiar stars as their
atmospheres cool and evolve toward lower gravity. During the main sequence
lifetime, we observe clear and systematic variations in the atmospheric
abundances of He, Ti, Cr, Fe, Pr and Nd. For all these elements, except He, the
atmospheric abundances decrease with age. The abundances of Fe-peak elements
converge toward solar values, while the rare-earth elements converge toward
values at least 100 times more abundant than in the Sun. Helium is always
underabundant compared to the Sun, evolving from about 1% up to 10% of the
solar He abundance. We have attempted to interpret the observed abundance
variations in the context of radiatively driven diffusion theory, which appears
to provide a framework to understand some, but not all, of the observed
anomalous abundance levels and variations.


title: Sensing-Aware Kernel SVM

abstract:
  We propose a novel approach for designing kernels for support vector machines
(SVMs) when the class label is linked to the observation through a latent state
and the likelihood function of the observation given the state (the sensing
model) is available. We show that the Bayes-optimum decision boundary is a
hyperplane under a mapping defined by the likelihood function. Combining this
with the maximum margin principle yields kernels for SVMs that leverage
knowledge of the sensing model in an optimal way. We derive the optimum kernel
for the bag-of-words (BoWs) sensing model and demonstrate its superior
performance over other kernels in document and image classification tasks.
These results indicate that such optimum sensing-aware kernel SVMs can match
the performance of rather sophisticated state-of-the-art approaches.


title:
Complete non-orientable minimal surfaces in $\mathbb{R}^3$ and
  asymptotic behavior

abstract:
  In this paper we give new existence results for complete non-orientable
minimal surfaces in $\mathbb{R}^3$ with prescribed topology and asymptotic
behavior.


title: Trade arrival dynamics and quote imbalance in a limit order book

abstract:
  We examine the dynamics of the bid and ask queues of a limit order book and
their relationship with the intensity of trade arrivals. In particular, we
study the probability of price movements and trade arrivals as a function of
the quote imbalance at the top of the limit order book. We propose a stochastic
model in an attempt to capture the joint dynamics of the top of the book queues
and the trading process, and describe a semi-analytic approach to calculate the
relative probability of market events. We calibrate the model using historical
market data and discuss the quality of fit and practical applications of the
results.