title:
Self-organization and phase transition in financial markets with
  multiple choices

abstract:
  Market confidence is essential for successful investing. By incorporating
multi-market into the evolutionary minority game, we investigate the effects of
investor beliefs on the evolution of collective behaviors and asset prices.
When there exists another investment opportunity, market confidence, including
overconfidence and under-confidence, is not always good or bad for investment.
The roles of market confidence is closely related to market impact. For low
market impact, overconfidence in a particular asset makes an investor become
insensitive to losses and a delayed strategy adjustment leads to a decline in
wealth, and thereafter, one's runaway from the market. For high market impact,
under-confidence in a particular asset makes an investor over-sensitive to
losses and one's too frequent strategy adjustment leads to a large fluctuation
in asset prices, and thereafter, a decrease in the number of agents. At an
intermediate market impact, the phase transition occurs. No matter what the
market impact is, an equilibrium between different markets exists, which is
reflected in the occurrence of similar price fluctuations in different markets.
A theoretical analysis indicates that such an equilibrium results from the
coupled effects of strategy updating and shift in investment. The runaway of
the agents trading a specific asset will lead to a decline in the asset price
volatility and such a decline will be inhibited by the clustering of the
strategies. A uniform strategy distribution will lead to a large fluctuation in
asset prices and such a fluctuation will be suppressed by the decrease in the
number of agents in the market. A functional relationship between the price
fluctuations and the numbers of agents is found.


title:
Behavior of susceptible-vaccinated--infected--recovered epidemics with
  diversity in the infection rate of the individuals

abstract:
  We study a susceptible-vaccinated--infected--recovered (SVIR)
epidemic-spreading model with diversity of infection rate of the individuals.
By means of analytical arguments as well as extensive computer simulations, we
demonstrate that the heterogeneity in infection rate can either impede or
accelerate the epidemic spreading, which depends on the amount of vaccinated
individuals introduced in the population as well as the contact pattern among
the individuals. Remarkably, as long as the individuals with different
capability of acquiring the disease interact with unequal frequency, there
always exist a cross point for the fraction of vaccinated, below which the
diversity of infection rate hinders the epidemic spreading and above which
expedites it. The overall results are robust to the SVIR dynamics defined on
different population models; the possible applications of the results are
discussed.


title: Steady-State Hadronic Gamma-Ray Emission from 100-Myr-Old Fermi Bubbles

abstract:
  The Fermi Bubbles are enigmatic \gamma-ray features of the Galactic bulge.
Both putative activity (within $\sim$ few $\times$ Myr) connected to the
Galactic center super-massive black hole and, alternatively, nuclear star
formation have been claimed as the energising source of the Bubbles. Likewise,
both inverse-Compton emission by non-thermal electrons (`leptonic' models) and
collisions between non-thermal protons and gas (`hadronic' models) have been
advanced as the process supplying the Bubbles' \gamma -ray emission. An issue
for any steady state hadronic model is that the very low density of the
Bubbles' plasma seems to require that they accumulate protons over a multi-Gyr
timescale, much longer than other natural timescales occurring in the problem.
Here we present a hadronic model where the timescale for generating the
Bubbles' hadronic \gamma -ray emission is $\sim$ few $\times 10^8$ years. Our
model invokes collapse of the Bubbles' thermally-unstable plasma, leading to an
accumulation of cosmic rays and magnetic field into localised, warm ($\sim
10^4$ K), and likely filamentary condensations of higher density gas. Under the
condition that these filaments are supported by non-thermal pressure, we can
predict the hadronic emission from the Bubbles to be $L_\gamma \simeq 2 \times
10^{37}$ erg/s $\ \dot{M}_\mathrm{in}/(0.1 \ M_{Sun}/$ year $) \
T_\mathrm{FB}^2/(3.5 \times 10^7 K) ^2 M_{fil}/M_{pls}$ ; precisely their
observed luminosity (normalizing to the star-formation-driven mass flux into
the Bubbles and their measured plasma temperature and adopting the further
result that the mass in the filaments, $M_{fil}$ is approximately equal to that
of the Bubbles' plasma, $M_{pls}$).


title: Compositions, Partitions, and Fibonacci Numbers

abstract:
  A bijective proof is given for the following theorem: the number of
compositions of n into odd parts equals the number of compositions of n + 1
into parts greater than one. Some commentary about the history of partitions
and compositions is provided.


title: Monotonic References for Gradual Typing

abstract:
  We describe an alternative approach to handling mutable references (aka.
pointers) within a gradually typed language that has different efficiency
characteristics than the prior approach of Herman et al. [2010]. In particular,
we reduce the costs of reading and writing through references in statically
typed regions of code. We reduce the costs to be the same as they would in a
statically typed language, that is, simply the cost of a load or store
instruction (for primitive data types). This reduction in cost is especially
important for programmers who would like to use gradual typing to facilitate
transitioning from a dynamically-typed prototype of an algorithm to a
statically-typed, high-performance implementation. The programmers we have in
mind are scientists and engineers who currently prototype in Matlab and then
manually translate their algorithms into Fortran. We present the static and
dynamic semantics for mutable references and a mechanized proof of type safety
using the Isabelle proof assistant.


title: Orbits of geometric descent

abstract:
  We prove that quasiconvex functions always admit descent trajectories
bypassing all non-minimizing critical points.


title: A Rademacher Type Formula For Partitions and Overpartitions

abstract:
  A Rademacher-type convergent series formula which generalizes the
Hardy-Ramanujan-Rademacher formula for the number of partitions of $n$ and the
Zuckerman formula for the Fourier coefficients of $\vartheta_4(0\vert
\tau)^{-1}$ is presented.


title: Levels of discontinuity, limit-computability, and jump operators

abstract:
  We develop a general theory of jump operators, which is intended to provide
an abstraction of the notion of "limit-computability" on represented spaces.
Jump operators also provide a framework with a strong categorical flavor for
investigating degrees of discontinuity of functions and hierarchies of sets on
represented spaces. We will provide a thorough investigation within this
framework of a hierarchy of $\Delta^0_2$-measurable functions between arbitrary
countably based $T_0$-spaces, which captures the notion of computing with
ordinal mind-change bounds. Our abstract approach not only raises new questions
but also sheds new light on previous results. For example, we introduce a
notion of "higher order" descriptive set theoretical objects, we generalize a
recent characterization of the computability theoretic notion of "lowness" in
terms of adjoint functors, and we show that our framework encompasses ordinal
quantifications of the non-constructiveness of Hilbert's finite basis theorem.


title:
Zero distribution of polynomials satisfying a differential-difference
  equation

abstract:
  In this paper we investigate the asymptotic distribution of the zeros of
polynomials $P_{n}(x)$ satisfying a first order differential-difference
equation. We give several examples of orthogonal and non-orthogonal families.


title:
Materials Design by Quantum-Chemical and other Theoretical/Computational
  Means: Applications to Energy Storage and Photoemissive Materials

abstract:
  The present paper discusses some recent developments in the field of rational
design for energy storage and photoemissive materials. Recent and new examples
of designer materials for Li-ion and Li-air type batteries with high capacity
and energy/power density as well as photoemissive materials with low
workfunctions and improved brightness are discussed as illustrative examples of
how quantum-chemical and other theoretical computational means can be used for
rational materials design.


title:
Redundancy and Aging of Efficient Multidimensional MDS-Parity Protected
  Distributed Storage Systems

abstract:
  The effect of redundancy on the aging of an efficient Maximum Distance
Separable (MDS) parity--protected distributed storage system that consists of
multidimensional arrays of storage units is explored. In light of the
experimental evidences and survey data, this paper develops generalized
expressions for the reliability of array storage systems based on more
realistic time to failure distributions such as Weibull. For instance, a
distributed disk array system is considered in which the array components are
disseminated across the network and are subject to independent failure rates.
Based on such, generalized closed form hazard rate expressions are derived.
These expressions are extended to estimate the asymptotical reliability
behavior of large scale storage networks equipped with MDS parity-based
protection. Unlike previous studies, a generic hazard rate function is assumed,
a generic MDS code for parity generation is used, and an evaluation of the
implications of adjustable redundancy level for an efficient distributed
storage system is presented. Results of this study are applicable to any
erasure correction code as long as it is accompanied with a suitable structure
and an appropriate encoding/decoding algorithm such that the MDS property is
maintained.


title:
Solving Einstein's Equation Numerically on Manifolds With Arbitrary
  Spatial Topologies

abstract:
  This paper develops a method for solving Einstein's equation numerically on
multi-cube representations of manifolds with arbitrary spatial topologies. This
method is designed to provide a set of flexible, easy to use computational
procedures that make it possible to explore the never before studied properties
of solutions to Einstein's equation on manifolds with arbitrary toplogical
structures. A new covariant, first-order symmetric-hyperbolic representation of
Einstein's equation is developed for this purpose, along with the needed
boundary conditions at the interfaces between adjoining cubic regions.
Numerical tests are presented that demonstrate the long-term numerical
stability of this method for evolutions of a complicated, time-dependent
solution of Einstein's equation coupled to a complex scalar field on a manifold
with spatial topology S^3. The accuracy of these numerical test solutions is
evaluated by performing convergence studies and by comparing the full
non-linear numerical results to the analytical perturbation solutions, which
are also derived here.


title: Acausality from a Dark Sector

abstract:
  Solutions to the hierarchy problem that require partners for each standard
model particle often require that these states live at or above the electroweak
scale, to satisfy phenomenological bounds. Partners to possible dark sector
particles may be significantly lighter, due to the assumed weakness of the
couplings between the dark and visible sectors. Here we consider the
possibility that a dark sector might include light Lee-Wick particles. We
present the formulation of a theory in which a dark photon and its Lee-Wick
partner have kinetic mixing with hypercharge. We point out that the Lee-Wick
partner of the dark photon will lead to an apparent violation of causality at
small distance scales that might be discerned in low-energy experiments.


title:
Origin of the universe: A hint from Eddington-inspired Born-Infeld
  gravity

abstract:
  We study the `initial state' of an anisotropic universe in Eddington-inspired
Born-Infeld gravity filled with a scalar field, whose potential has various
forms. With this purpose, the evolution of a spatially-flat, homogeneous
anisotropic Kasner universe is studied. We find an exact evolution of universe
for each scalar potential by imposing a maximal pressure condition. The
solution is shown to describe the initial state of the universe. The state is
regular if the scalar potential increases not faster than the quadratic power
for large field values. We also show that the anisotropy does not raise any
defect in early universe contrary to the case of general relativity.


title:
On the semi-annual, 27 day, variation in geomagnetic activity, cloud
  cover and surface temperature

abstract:
  We develop a basic model of the time variation of geomagnetic activity and
show that the model predicts, with decreasing levels of exactitude, the time
variation of the ~27 day period components of geomagnetic aa index, cloud cover
and surface temperature during several years near solar cycle minima. We
interpret this as indicating that there is a connection between the ~27 day
variation of geomagnetic activity and the ~27 day variations of cloud cover and
surface temperature with the decreasing correlations between model variation
and aa index, cloud cover and surface temperature variation due to delays and
phase shifts between the three variables some of which are obvious, such as the
180 degree seasonal phase shift between cloud cover and surface temperature,
and others less certain. We find that, while the components of cloud cover and
surface temperature influenced by geomagnetic activity amount to, on average,
about 20% of the overall variations, the influence may be several times higher
during the semi-annual maxima in geomagnetic activity that occur around the
equinoxes.


title:
Physics at the surface of a star in Eddington-inspired Born-Infeld
  gravity

abstract:
  We study phenomena happening at the surface of a star in Eddington-inspired
Born-Infeld (EiBI) gravity. The star is made of particles, which are
effectively described by a polytropic fluid. The EiBI theory was known to have
a pathology that singularities happen at a star surface. We suggest that the
gravitational back-reaction on the particles cures the problem. Strong tidal
forces near the (surface) singularity modify the effective equation of state of
the particles or make the surface be unstable depending on its matter contents.
The geodesic deviation equations take after the Hooke's law, where its
frequency-squared is proportional to the scalar curvature at the surface. For a
positive curvature, a particle collides with a probing wall more often and
increases the pressure. With the increased pressure, the surface is no longer
singular. For a negative curvature, the matters around the surface experience
repulsions with infinite accelerations. Therefore, the EiBI gravity is saved
from the pathology of surface singularity.


title:
Shocks and Star Formation in Stephan's Quintet. I. Gemini Spectroscopy
  of H{\alpha}-bright knots

abstract:
  We present a Gemini-GMOS spectroscopic study of HST-selected
H{\alpha}-emitting regions in Stephan's Quintet (HCG 92), a nearby compact
galaxy group, with the aim of disentangling the processes of shock-induced
heating and star formation in its intra-group medium. The $\approx$40 sources
are distributed across the system, but most densely concentrated in the
$\sim$kpc-long shock region. Their spectra neatly divide them into narrow- and
and broad-line emitters, and we decompose the latter into three or more
emission peaks corresponding to spatial elements discernible in HST imaging.
The emission line ratios of the two populations of H{\alpha}-emitters confirm
their nature as H II regions (90% of the sample) or molecular gas heated by a
shock-front propagating at $\lesssim$300 km/s. Their redshift distribution
reveals interesting three-dimensional structure with respect to gas-phase
baryons, with no H II regions associated with shocked gas, no shocked regions
in the intruder galaxy NGC 7318B, and a sharp boundary between shocks and star
formation. We conclude that star formation is inhibited substantially, if not
entirely, in the shock region. Attributing those H II regions projected against
the shock to the intruder, we find a lopsided distribution of star formation in
this galaxy, reminiscent of pile-up regions in models of interacting galaxies.
The H{\alpha} luminosities imply mass outputs, star formation rates, and
efficiencies similar to nearby star-forming regions. Two large knots are an
exception to this, being comparable in stellar output to the prolific 30
Doradus region. We also examine Stephan's Quintet in the context of compact
galaxy group evolution, as a paradigm for intermittent star formation histories
in the presence of a rich, X-ray emitting intra-group medium.


title:
Data completion and stochastic algorithms for PDE inversion problems
  with many measurements

abstract:
  Inverse problems involving systems of partial differential equations (PDEs)
with many measurements or experiments can be very expensive to solve
numerically. In a recent paper we examined dimensionality reduction methods,
both stochastic and deterministic, to reduce this computational burden,
assuming that all experiments share the same set of receivers. In the present
article we consider the more general and practically important case where
receivers are not shared across experiments. We propose a data completion
approach to alleviate this problem. This is done by means of an approximation
using an appropriately restricted gradient or Laplacian regularization,
extending existing data for each experiment to the union of all receiver
locations. Results using the method of simultaneous sources (SS) with the
completed data are then compared to those obtained by a more general but slower
random subset (RS) method which requires no modifications.


title:
Developing a method for soft gamma-ray Laue lens assembly and
  calibration

abstract:
  Laue lenses constitute a promising option for concentrating soft gamma rays
with a large collection area and reasonable focal lengths. In astronomy they
could lead to increased telescope sensitivity by one to two orders of
magnitude, in particular for faint nuclear gamma-ray lines, but also for
continua like hard X-ray tails from a variety of compact objects. Other fields
like Homeland security and nuclear medicine share the same need for more
sensitive gamma-ray detection systems and could find applications for gamma-ray
focusing optics. There are two primary challenges for developing Laue lenses:
the search for high-reflectivity and reproducible crystals, and the development
of a method to accurately orient and fix the thousands of crystals constituting
a lens. In this paper we focus on the second topic. We used our dedicated X-ray
beamline and Laue lens assembly station to build a breadboard lens made of 15
crystals. This allowed us to test our tools and methods, as well as our
simulation code and calibration procedure. Although some critical points were
identified, the results are very encouraging, with a crystal orientation
distribution lower than $10''$, as required to build a Laue lens telescope
dedicated to the study of Type Ia supernovae (30-m focal length). This
breadboard lens represents an important step towards raising the technology
readiness level of Laue lenses.


title: Coleman-de Luccia instanton in dRGT massive gravity

abstract:
  We study the Coleman-de Luccia (CDL) instanton characterizing the tunneling
from a false vacuum to the true vacuum in a semi-classical way in dRGT
(deRham-Gabadadze-Tolley) massive gravity theory, and evaluate the dependence
of the tunneling rate on the model parameters. It is found that provided with
the same physical Hubble parameters for the true vacuum $H_{\rm T}$ and the
false vacuum $H_{\rm F}$ as in General Relativity (GR), the thin-wall
approximation method implies the same tunneling rate as GR. However, deviations
of tunneling rate from GR arise when one goes beyond the thin-wall
approximation and they change monotonically until the Hawking-Moss (HM) case.
Moreover, under the thin-wall approximation, the HM process may dominate over
the CDL one if the value for the graviton mass is larger than the inverse of
the radius of the bubble.


title:
Multilayer nanoparticle arrays for broad spectrum absorption enhancement
  in thin film solar cells

abstract:
  In this paper, we present a theoretical study on the absorption efficiency
enhancement of a thin film amorphous Silicon (a-Si) photovoltaic cell over a
broad spectrum of wavelengths using multiple nanoparticle arrays. The light
absorption efficiency is enhanced in the lower wavelengths by a nanoparticle
array on the surface and in the higher wavelengths by another nanoparticle
array embedded in the active region. The efficiency at intermediate wavelengths
is enhanced by the simultaneous resonance from both nanoparticle layers. We
optimize this design by tuning the radius of particles in both arrays, the
period of the array and the distance between the two arrays. The optimization
results in a total quantum efficiency of 62.35% for a 300nm thick a-Si
substrate.


title:
Quantifying randomness in protein-protein interaction networks of
  different species: A random matrix approach

abstract:
  We analyze protein-protein interaction networks for six different species
under the framework of random matrix theory. Nearest neighbor spacing
distribution of the eigenvalues of adjacency matrices of the largest connected
part of these networks emulate universal Gaussian orthogonal statistics of
random matrix theory. We demonstrate that spectral rigidity, which quantifies
long range correlations in eigenvalues, for all protein-protein interaction
networks follow random matrix prediction up to certain ranges indicating
randomness in interactions. After this range, deviation from the universality
evinces underlying structural features in network.


title:
Generalized Non-orthogonal Joint Diagonalization with LU Decomposition
  and Successive Rotations

abstract:
  Non-orthogonal joint diagonalization (NJD) free of prewhitening has been
widely studied in the context of blind source separation (BSS) and array signal
processing, etc. However, NJD is used to retrieve the jointly diagonalizable
structure for a single set of target matrices which are mostly formulized with
a single dataset, and thus is insufficient to handle multiple datasets with
inter-set dependences, a scenario often encountered in joint BSS (J-BSS)
applications. As such, we present a generalized NJD (GNJD) algorithm to
simultaneously perform asymmetric NJD upon multiple sets of target matrices
with mutually linked loading matrices, by using LU decomposition and successive
rotations, to enable J-BSS over multiple datasets with indication/exploitation
of their mutual dependences. Experiments with synthetic and real-world datasets
are provided to illustrate the performance of the proposed algorithm.


title:
Guiding Testing Activities by Predicting Defect-prone Parts Using
  Product and Inspection Metrics

abstract:
  Product metrics, such as size or complexity, are often used to identify
defect-prone parts or to focus quality assurance activities. In contrast,
quality information that is available early, such as information provided by
inspections, is usually not used. Currently, only little experience is
documented in the literature on whether data from early defect detection
activities can support the identification of defect-prone parts later in the
development process. This article compares selected product and inspection
metrics commonly used to predict defect-prone parts. Based on initial
experience from two case studies performed in different environments, the
suitability of different metrics for predicting defect-prone parts is
illustrated. These studies revealed that inspection defect data seems to be a
suitable predictor, and a combination of certain inspection and product metrics
led to the best prioritizations in our contexts.


title:
On sufficient conditions for expressibility of constants in the 4-valued
  extension of the propositional provability logic $GL$

abstract:
  In the present paper we consider the simplest non-classical extension $GL4$
of the well-known propositional provability logic $GL$ together with the notion
of expressibility of formulas in a logic proposed by A. V. Kuznetsov.
Conditions for expressibility of constants in the 4-valued extension
$L\mathfrak{B}_2$ of $GL$ are found out, which were first announced in a
author's paper in 1996.


title:
Quantum Computation and Non-Abelian Statistics in Chern-Simons-Higgs
  Theory

abstract:
  We naturally obtain the NOT and CNOT logic gates, which are key pieces of
quantum computing algorithms, in the framework of the non-Abelian
Chern-Simons-Higgs theory in two spatial dimensions. For that, we consider the
anyonic quantum vortex topological excitations occurring in this system and
show that self-adjoint (Majorana-like) combinations of these vortices and
anti-vortices have in general non-Abelian statistics. The associated unitary
monodromy braiding matrices become the required logic gates in the special case
when the vortex spin is $s=1/4$. We explicitly construct the vortex field
operators, show that they carry both magnetic flux and charge and obtain their
euclidean correlation functions by using the method of quantization of
topological excitations, which is based on the order-disorder duality. These
correlators are in general multivalued, the number of sheets being determined
by the vortex spin. This, by its turn, is proportional to the vacuum
expectation value of the Higgs field and therefore can be tuned both by the
free parameters of the Higgs potential and the temperature.


title: Generalized Statistical Mechanics at the Onset of Chaos

abstract:
  Transitions to chaos in archetypal low-dimensional nonlinear maps offer real
and precise model systems in which to assess proposed generalizations of
statistical mechanics. The known association of chaotic dynamics with the
structure of Boltzmann--Gibbs (BG) statistical mechanics has suggested the
potential verification of these generalizations at the onset of chaos, when the
only Lyapunov exponent vanishes and ergodic and mixing properties cease to
hold. There are three well-known routes to chaos in these deterministic
dissipative systems, period-doubling, quasi-periodicity and intermittency,
which provide the setting in which to explore the limit of validity of the
standard BG structure. It has been shown that there is a rich and intricate
behavior for both the dynamics within and towards the attractors at the onset
of chaos and that these two kinds of properties are linked via generalized
statistical-mechanical expressions. Amongst the topics presented are: (i)
permanently growing sensitivity fluctuations and their infinite family of
generalized Pesin identities; (ii) the emergence of statistical-mechanical
structures in the dynamics along the routes to chaos; (iii) dynamical
hierarchies with modular organization; and (iv) limit distributions of sums of
deterministic variables. The occurrence of generalized entropy properties in
condensed-matter physical systems is illustrated by considering critical
fluctuations, localization transition and glass formation. We complete our
presentation with the description of the manifestations of the dynamics at the
transitions to chaos in various kinds of complex systems, such as, frequency
and size rank distributions and complex network images of time series. We
discuss the results.


title:
Terahertz Transverse-Electric- and Transverse-Magnetic-polarized waves
  localized on graphene in photonic crystals

abstract:
  We predict the coexistence of both TE- and TM-polarized localized
electromagnetic waves that can propagate \emph{in the same frequency range}
along a graphene layer inserted in a photonic crystal. In addition, we studied
the excitation of these modes by an external wave and have shown that the
resonance peaks of the sample transmissivity should be observed due to the
excitation of the localized waves, independently of the polarization of the
exciting wave. The simplicity of the derived dispersion relations for the
localized modes and the possibility to excite waves of both polarizations
provide a method for measuring graphene conductivity.


title:
Electromagnetic Lens-focusing Antenna Enabled Massive MIMO: Performance
  Improvement and Cost Reduction

abstract:
  Massive multiple-input multiple-output (MIMO) techniques have been recently
advanced to tremendously improve the performance of wireless communication
networks. However, the use of very large antenna arrays at the base stations
(BSs) brings new issues, such as the significantly increased hardware and
signal processing costs. In order to reap the enormous gain of massive MIMO and
yet reduce its cost to an affordable level, this paper proposes a novel system
design by integrating an electromagnetic (EM) lens with the large antenna
array, termed the EM-lens enabled MIMO. The EM lens has the capability of
focusing the power of an incident wave to a small area of the antenna array,
while the location of the focal area varies with the angle of arrival (AoA) of
the wave. Therefore, in practical scenarios where the arriving signals from
geographically separated users have different AoAs, the EM-lens enabled system
provides two new benefits, namely energy focusing and spatial interference
rejection. By taking into account the effects of imperfect channel estimation
via pilot-assisted training, in this paper we analytically show that the
average received signal-to-noise ratio (SNR) in both the single-user and
multiuser uplink transmissions can be strictly improved by the EM-lens enabled
system. Furthermore, we demonstrate that the proposed design makes it possible
to considerably reduce the hardware and signal processing costs with only
slight degradations in performance. To this end, two complexity/cost reduction
schemes are proposed, which are small-MIMO processing with parallel receiver
filtering applied over subgroups of antennas to reduce the computational
complexity, and channel covariance based antenna selection to reduce the
required number of radio frequency (RF) chains. Numerical results are provided
to corroborate our analysis.


title: Non-associative Deformations of Geometry in Double Field Theory

abstract:
  Non-geometric string backgrounds were proposed to be related to a
non-associative deformation of the space-time geometry. In the flux formulation
of double field theory (DFT), the structure of mathematically possible
non-associative deformations is analyzed in detail. It is argued that on-shell
there should not be any violation of associativity in the effective DFT action.
For imposing either the strong or the weaker closure constraint we discuss two
possible non-associative deformations of DFT featuring two different ways how
on-shell associativity can still be kept.


title:
Software Defined Radio Implementation of Signaling Splitting in
  Hyper-Cellular Network

abstract:
  This paper presents the design and implementation of signaling splitting
scheme in hyper-cellular network on a software defined radio platform.
Hyper-cellular network is a novel architecture of future mobile communication
systems in which signaling and data are decoupled at the air interface to
mitigate the signaling overhead and allow energy efficient operation of base
stations. On an open source software defined radio platform, OpenBTS, we
investigate the feasibility of signaling splitting for GSM protocol and
implement a novel system which can prove the proposed concept. Standard GSM
handsets can camp on the network with the help of signaling base station, and
data base station will be appointed to handle phone calls on demand. Our work
initiates the systematic approach to study hyper-cellular concept in real
wireless environment with both software and hardware implementations.


title:
Thermal conductivity of the quark matter for the SU(2) light-flavor
  sector

abstract:
  We investigate the thermal conductivity ($\kappa$) of the quark matter at
finite quark chemical potential $(\mu)$ and temperature $(T)$, employing the
Green-Kubo formula, for the SU(2) light-flavor sector with the finite
current-quark mass $m=5$ MeV. As a theoretical framework, we construct an
effective thermodynamic potential from the $(\mu,T)$-modified liquid-instanton
model (mLIM). Note that all the relevant model parameters are designated as
functions of $T$, using the trivial-holonomy caloron solution. By solving the
self-consistent equation of mLIM, we acquire the constituent-quark mass $M_0$
as a function of $T$ and $\mu$, satisfying the universal-class patterns of the
chiral phase transition. From the numerical results for $\kappa$, we observe
that there emerges a peak at $\mu\approx200$ MeV for the low-$T$ region, i.e.
$T\lesssim100$ MeV. As $T$ increase over $T\approx100$ MeV, the curve for
$\kappa$ is almost saturated as a function of $T$ in the order of
$\sim10^{-1}\,\mathrm{GeV}^2$, and grows with respect to $\mu$ smoothly. At the
normal nuclear-matter density $\rho_0=0.17\,\mathrm{fm}^{-3}$, $\kappa$ shows
its maximum $6.22\,\mathrm{GeV}^2$ at $T\approx10$ MeV, then decreases
exponentially down to $\kappa\approx0.2\,\mathrm{GeV}^2$. We also compute the
ratio of $\kappa$ and the entropy density, i.e. $\kappa/s$ as a function of
$(\mu,T)$ which is a monotonically decreasing function for a wide range of $T$,
then approaches a lower bound at very high $T$:
$\kappa/s_\mathrm{min}\gtrsim0.3\,\mathrm{GeV}^{-1}$ in the vicinity of
$\mu=0$.


title:
Sherali-Adams gaps, flow-cover inequalities and generalized
  configurations for capacity-constrained Facility Location

abstract:
  Metric facility location is a well-studied problem for which linear
programming methods have been used with great success in deriving approximation
algorithms. The capacity-constrained generalizations, such as capacitated
facility location (CFL) and lower-bounded facility location (LBFL), have proved
notorious as far as LP-based approximation is concerned: while there are
local-search-based constant-factor approximations, there is no known linear
relaxation with constant integrality gap. According to Williamson and Shmoys
devising a relaxation-based approximation for \cfl\ is among the top 10 open
problems in approximation algorithms.
  This paper advances significantly the state-of-the-art on the effectiveness
of linear programming for capacity-constrained facility location through a host
of impossibility results for both CFL and LBFL. We show that the relaxations
obtained from the natural LP at $\Omega(n)$ levels of the Sherali-Adams
hierarchy have an unbounded gap, partially answering an open question of
\cite{LiS13, AnBS13}. Here, $n$ denotes the number of facilities in the
instance. Building on the ideas for this result, we prove that the standard CFL
relaxation enriched with the generalized flow-cover valid inequalities
\cite{AardalPW95} has also an unbounded gap. This disproves a long-standing
conjecture of \cite{LeviSS12}. We finally introduce the family of proper
relaxations which generalizes to its logical extreme the classic star
relaxation and captures general configuration-style LPs. We characterize the
behavior of proper relaxations for CFL and LBFL through a sharp threshold
phenomenon.


title: The Input/Output Complexity of Triangle Enumeration

abstract:
  We consider the well-known problem of enumerating all triangles of an
undirected graph. Our focus is on determining the input/output (I/O) complexity
of this problem. Let $E$ be the number of edges, $M<E$ the size of internal
memory, and $B$ the block size. The best results obtained previously are
sort$(E^{3/2})$ I/Os (Dementiev, PhD thesis 2006) and $O(E^2/(MB))$ I/Os (Hu et
al., SIGMOD 2013), where sort$(n)$ denotes the number of I/Os for sorting $n$
items. We improve the I/O complexity to $O(E^{3/2}/(\sqrt{M} B))$ expected
I/Os, which improves the previous bounds by a factor
$\min(\sqrt{E/M},\sqrt{M})$. Our algorithm is cache-oblivious and also I/O
optimal: We show that any algorithm enumerating $t$ distinct triangles must
always use $\Omega(t/(\sqrt{M} B))$ I/Os, and there are graphs for which
$t=\Omega(E^{3/2})$. Finally, we give a deterministic cache-aware algorithm
using $O(E^{3/2}/(\sqrt{M} B))$ I/Os assuming $M\geq E^\varepsilon$ for a
constant $\varepsilon > 0$. Our results are based on a new color coding
technique, which may be of independent interest.


title:
A recent accretion burst in the low-mass protostar IRAS 15398-3359: ALMA
  imaging of its related chemistry

abstract:
  Low-mass protostars have been suggested to show highly variable accretion
rates through-out their evolution. Such changes in accretion, and related
heating of their ambient envelopes, may trigger significant chemical variations
on different spatial scales and from source-to-source. We present images of
emission from C17O, H13CO+, CH3OH, C34S and C2H toward the low-mass protostar
IRAS 15398-3359 on 0.5" (75 AU diameter) scales with the Atacama Large
Millimeter/submillimeter Array (ALMA) at 340 GHz. The resolved images show that
the emission from H13CO+ is only present in a ring-like structure with a radius
of about 1-1.5" (150-200 AU) whereas the CO and other high dipole moment
molecules are centrally condensed toward the location of the central protostar.
We propose that HCO+ is destroyed by water vapor present on small scales. The
origin of this water vapor is likely an accretion burst during the last
100-1000 years increasing the luminosity of IRAS 15398-3359 by a factor of 100
above its current luminosity. Such a burst in luminosity can also explain the
centrally condensed CH3OH and extended warm carbon-chain chemistry observed in
this source and furthermore be reflected in the relative faintness of its
compact continuum emission compared to other protostars.


title:
Spacecraft Doppler tracking with possible violations of LLI and LPI: a
  theoretical modeling

abstract:
  Currently two-way and three-way spacecraft Doppler tracking techniques are
widely used and playing important roles in control and navigation for deep
space missions. Starting from one-way Doppler model, we extend the models of
two-way and three-way Doppler by making them include possible violations of the
local Lorentz invariance (LLI) and the local position invariance (LPI) in order
to test the Einstein equivalence principle which is the cornerstone of general
relativity and all other metric theories of gravity. After taking the finite
speed of light into account, which is so-called light-time solution (LTS), we
have these models depending on the time of reception of the signal only for
practical convenience. We find that possible violations of LLI and LPI can not
affect two-way Doppler under linear approximation of LTS although this
approximation is sufficiently good for most cases in the solar system. We also
show that, in three-way Doppler, possible violations of LLI and LPI associate
with two stations only, which suggests that it is better to set the stations at
places with significant differences in velocities and gravitational potentials
to obtain high level of sensitivity for tests.


title:
Cyclotron-resonance-assisted photon drag effect in InSb/InAlSb quantum
  wells excited by terahertz radiation

abstract:
  We report on the observation of the cyclotron-resonance-assisted photon drag
effect. Resonant photocurrent is detected in InSb/InAlSb quantum wells
structures subjected to a static magnetic field and excited by terahertz
radiation at oblique incidence. The developed theory based on Boltzmann's
kinetic equation is in a good agreement with the experimental findings. We show
that the resonant photocurrent originates from the transfer of photon momentum
to free electrons drastically enhanced at cyclotron resonance.


title: Integration operators between Hardy spaces on the unit ball of $\Cn$

abstract:
  We completely describe the boundedness of the Volterra type operator $J_ g$
between Hardy spaces in the unit ball of $\Cn$. The proof of the one
dimensional case used tools, such as the strong factorization for Hardy spaces,
that are not available in higher dimensions, and therefore new techniques are
developed. In particular, a generalized version of the description of Hardy
spaces in terms of the area function is needed.


title:
A Backstepping Control Method for a Nonlinear Process - Two
  Coupled-Tanks

abstract:
  The aim of this work is to compute a level backstepping control strategy for
a coupled tanks system. The coupled tanks plant is a component included in the
water treatment system of power plants. The nonlinear-model of the process was
designed and implemented in Matlab- Simulink. The advantages of the control
method proposed is that it takes into consideration the nonlinearity which can
be useful for stabilization and a larger operating point with specified
performances. The backstepping control method is computed using the nonlinear
model of the system and the performance was validated on the physical plant.


title: A Characterization of Mixed Unit Interval Graphs

abstract:
  We give a complete characterization of mixed unit interval graphs, the
intersection graphs of closed, open, and half-open unit intervals of the real
line. This is a proper superclass of the well known unit interval graphs. Our
result solves a problem posed by Dourado, Le, Protti, Rautenbach and
Szwarcfiter (Mixed unit interval graphs, Discrete Math. 312, 3357-3363 (2012)).


title: 3-Dimensional Discrete curvature flows and discrete Einstein metric

abstract:
  We introduce the discrete Einstein metrics as critical points of discrete
energy on triangulated 3-manifolds, and study them by discrete curvature flow
of second (fourth) order. We also study the convergence of the discrete
curvature flow. Discrete curvature flow of second order is an analogue of
smooth Ricci flow.


title:
Existence condition and phase transition of Reissner-Nordstr\"{o}m-de
  Sitter black hole

abstract:
  After introducing the connection between the black hole horizon and the
cosmological horizon, we discuss the thermodynamic properties of
Reissner-Nordstrom-de Sitter (RN-dS) spacetime. We present the condition under
which RN-dS black hole can exist. Employing Ehrenfest' classification we
conclude that the phase transition of RN-dS black hole is the second-order one.
The position of the phase transition point is irrelevant to the electric charge
of the system. It only depends on the ratio of the black hole horizon and the
cosmological horizon.


title: Random Subgraphs in Sparse Graphs

abstract:
  We investigate the threshold probability for connectivity of sparse graphs
under weak assumptions. As a corollary this completely solve the problem for
Cartesian powers of arbitrary graphs. In detail, let $G$ be a connected graph
on $k$ vertices, $G^n$ the $n$-th Cartesian power of $G$, $\alpha_i$ be the
number of vertices of degree $i$ of $G$, $\lambda$ be a positive real number,
and $G^n_p$ be the graph obtained from $G^n$ by deleting every edge
independently with probability $1-p$. If
$\sum_{i}\alpha_i(1-p)^i=\lambda^{\frac{1}{n}}$, then $\lim_{n\rightarrow
\infty}\mathbb{P}[G^n_p {\rm\ is\ connected}]=\exp(-\lambda)$. This result
extends known results for regular graphs. The main result implies that the
threshold probability does not depend on the graph structure of $G$ itself, but
only on the degree sequence of the graph.


title: Thermally driven continuous-wave and pulsed optical vortex

abstract:
  We demonstrated the continuous-wave (cw) and pulsed optical vortex with
topological charges driven by heat generated during the lasing process without
introducing the astigmatism effect and reducing lasing efficiency. During the
lasing process, the topological charges were changeable by the thermal-induced
lens and selected by the mode-matching between the pump and oscillating beams.
With a graphene sample as the saturable absorber, the pulsed optical vortex was
achieved at the wavelength of 1.36 {\mu}m, which identified that graphene could
be used as a pulse modulator for the generation of pulsed optical vortex. It
could be believed that the thermally driven cw and pulsed optical vortex should
have various promising applications based on the compact structure, changeable
topological charges and specific wavelength


title: Radiation and vorticity: The missing link

abstract:
  In the context of General Relativity, radiation, either gravitational or
electromagnetic, is closely associated to vorticity of observers world lines.
We stress in this letter that the factor that relates the two phenomena is a
circular flow of energy (electromagnetic) and/or superenergy on the planes
orthogonal to vorticity vector. We also stress the potential relevance of the
abovementioned relationship in experiments to detect gravitational radiation.


title:
Use of the C4.5 machine learning algorithm to test a clinical
  guideline-based decision support system

abstract:
  Well-designed medical decision support system (DSS) have been shown to
improve health care quality. However, before they can be used in real clinical
situations, these systems must be extensively tested, to ensure that they
conform to the clinical guidelines (CG) on which they are based. Existing
methods cannot be used for the systematic testing of all possible test cases.
We describe here a new exhaustive dynamic verification method. In this method,
the DSS is considered to be a black box, and the Quinlan C4.5 algorithm is used
to build a decision tree from an exhaustive set of DSS input vectors and
outputs. This method was successfully used for the testing of a medical DSS
relating to chronic diseases: the ASTI critiquing module for type 2 diabetes.


title:
A generic system for critiquing physicians' prescriptions: usability,
  satisfaction and lessons learnt

abstract:
  Clinical decision support systems have been developed to help physicians to
take clinical guidelines into account during consultations. The ASTI critiquing
module is one such systems; it provides the physician with automatic criticisms
when a drug prescription does not follow the guidelines. It was initially
developed for hypertension and type 2 diabetes, but is designed to be generic
enough for application to all chronic diseases. We present here the results of
usability and satisfaction evaluations for the ASTI critiquing module, obtained
with GPs for a newly implemented guideline concerning dyslipaemia, and we
discuss the lessons learnt and the difficulties encountered when building a
generic DSS for critiquing physicians' prescriptions.


title: Doped Polyaniline: A Possible Anode for Organic Electronics

abstract:
  Polymer based printable organic thin film transistor (OTFT) is a viable low
cost alternative to amorphous silicon based thin film transistors and possesses
light-weight and flexibility advantage. In this paper, we report on the hole
injecting properties of doped PANI in OLED devices using it as an anode. From
these results we conclude that hole doped PANI layers can be used as a low
contact resistance source and drain electrode material for polymer OTFTs.


title:
Quantum-discord-induced superradiance and subradiance in a system of two
  separated atoms

abstract:
  We investigate collective radiant properties of two separated atoms in X-type
quantum states. We show that quantum correlations measured by quantum discord
(QD) can induce and enhance superradiance and subradiance in the two-atom
system even though in the absence of interatomic quantum entanglement. We also
explore quantum statistical properties of photons in the superradiance and
subradiance by addressing the second-order correlation function. In particular,
when the initial state of the two separated atoms is the Werner state with
non-zero QD, we find that radiation photons in the superradiant region exhibit
the nonclassical sub-Poissonian statistics and the degree of the sub-Poissonian
statistics increases with increasing of the QD amount, while radiation photons
in the subradiant region have either the sub-Poissonian or super-Poissonian
statistics depending on the amount of QD and the directional angle. In the
subradiant regime we predict the QD-induced photon statistics transition from
the super-Poissonian to sub-Poissonian statistics. These results shed a new
light on applications of QD as a quantum resource.


title: Sailing through the big crunch-big bang transition

abstract:
  In a recent series of papers, we have shown that theories with scalar fields
coupled to gravity (e.g., the standard model) can be lifted to a Weyl-invariant
equivalent theory in which it is possible to unambiguously trace the classical
cosmological evolution through the transition from big crunch to big bang. The
key was identifying a sufficient number of finite, Weyl-invariant conserved
quantities to uniquely match the fundamental cosmological degrees of freedom
across the transition. In so doing we had to account for the well-known fact
that many Weyl-invariant quantities diverge at the crunch and bang. Recently,
some authors rediscovered a few of these divergences and concluded based on
their existence alone that the theories cannot be geodesically complete. In
this note, we show that this conclusion is invalid. Using conserved quantities
we explicitly construct the complete set of geodesics and show that they pass
continuously through the big crunch-big bang transition.


title:
Cosmology of the Spinor Emergent Universe and Scale-invariant
  Perturbations

abstract:
  A nonsingular emergent universe cosmology can be realized by a
nonconventional spinor field as first developed in \cite{Cai:2012yf}. We study
the mechanisms of generating scale-invariant primordial power spectrum of
curvature perturbation in the frame of spinor emergent universe cosmology.
Particularly, we introduce a light scalar field of which the kinetic term
couples to the bilinear of the spinor field. This kinetic coupling can give
rise to an effective "Hubble radius" for primordial fluctuations from the
scalar field to squeeze at large length scales as well as to form a nearly
scale-invariant power spectrum. We study the stability of the backreaction and
constrain the forms of the coupling terms. These almost scale-independent
fluctuations are able to be transferred into curvature perturbation after the
epoch of emergent universe through a generalized curvaton mechanism and thus
can explain cosmological observations.


title:
Measurement of the direct $CP$-violating charge asymmetry in ${D_s^\pm
  \rightarrow \phi \pi^{\pm}}$ decays

abstract:
  We present a measurement of the direct $CP$-violating charge asymmetry in
$D_s^\pm \to \phi \pi^{\pm}$ decays where the $\phi$ meson decays to $K^+K^-$,
using the full Run II data set with an integrated luminosity of 10.4 fb$^{-1}$
of proton-antiproton collisions collected using the D0 detector at the Fermilab
Tevatron Collider. The normalised difference $A_{CP}$ in the yield of $D_s^+$
and $D_s^-$ mesons in these decays is measured by fitting the difference
between their reconstructed invariant mass distributions. This results in an
asymmetry of $A_{CP} =\left[ -0.38 \pm 0.27 \right]%$, which is the most
precise measurement of this quantity to date. The result is consistent with the
standard model prediction of zero $CP$ asymmetry in this decay.
  Updated to include changes made after referees comments. Corrected an
affiliation in the author list.


title: Parallel Deferred Update Replication

abstract:
  Deferred update replication (DUR) is an established approach to implementing
highly efficient and available storage. While the throughput of read-only
transactions scales linearly with the number of deployed replicas in DUR, the
throughput of update transactions experiences limited improvements as replicas
are added. This paper presents Parallel Deferred Update Replication (P-DUR), a
variation of classical DUR that scales both read-only and update transactions
with the number of cores available in a replica. In addition to introducing the
new approach, we describe its full implementation and compare its performance
to classical DUR and to Berkeley DB, a well-known standalone database.


title:
Search for 2{\beta} decay of 116Cd with the help of enriched 116CdWO4
  crystal scintillators

abstract:
  Cadmium tungstate crystal scintillators enriched in $^{116}$Cd to 82%
($^{116}$CdWO$_4$, total mass of $\approx$1.2 kg) are used to search for
2$\beta$ decay of $^{116}$Cd deep underground at the Gran Sasso National
Laboratory of the INFN (Italy). The radioactive contamination of the
$^{116}$CdWO$_4$ crystals has been studied carefully to reconstruct the
background of the detector. The measured half-life of $^{116}$Cd relatively to
2$\nu$2$\beta$ decay is $T^{2\nu2\beta}_{1/2}$ = [2.8 $\pm$ 0.05(stat.) $\pm$
0.4(syst.)] $\times$ 10$^{19}$ yr, in agreement with the results of previous
experiments. The obtained limit on the 0$\nu$2$\beta$ decay of $^{116}$Cd
(considering the data of the last 8696 h run with an advanced background
0.12(2) counts/yr/kg/keV in the energy interval 2.7-2.9 MeV) is $T_{1/2} \ge
1.0 \times 10^{23}$ yr at 90% C.L. The sensitivity of the experiment to the
$0\nu2\beta$ process is $\lim T_{1/2} = 3 \times 10^{23}$ yr at 90% C.L. over 5
years of the measurements and it can be advanced (by further reduction of the
background by a factor 3-30) to the level of $\lim T_{1/2} = (0.5-1.5) \times
10^{24}$ yr for the same period of the data taking.


abstract:
  Magnetocaloric effect in
{[Fe(pyrazole)$_4$]$_2$[Nb(CN)$_8$]$\cdot$4H$_2$O}$_n$ molecular magnet is
reported. It crystallizes in tetragonal I4$_1$/a space group. The compound
exhibits a phase transition to a long range magnetically ordered state at
$T_\mathrm{c}\approx$8.3 K. The magnetic entropy change $\Delta S_\mathrm{M}$
as well as the adiabatic temperature change $\Delta T_\mathrm{ad}$ due to
applied field change $\mu_0\Delta H$=0.1, 0.2, 0.5, 1, 2, 5, 9 T as a function
of temperature have been determined by the relaxation calorimetry measurements.
The maximum value of $\Delta S_\mathrm{M}$ for $\mu_0\Delta H=5$ T is 4.9 J
mol$^{-1}$ K$^{-1}$ (4.8 J kg$^{-1}$ K$^{-1}$) at 10.3 K. The corresponding
maximum value of $\Delta T_\mathrm{ad}$ is 2.0 K at 8.9 K. The temperature
dependence of the exponent $n$ characterizing the field dependence of $\Delta
S_\mathrm{M}$ has been estimated. It attains the value of 0.64 at the
transition temperature, which is consistent with the 3D Heisenberg universality
class.


title:
Theoretical predictions of experimental observables sensitive to the
  symmetry energy: Results of the SMF transport model

abstract:
  In the framework of mean-field based transport approaches, we discuss recent
results concerning heavy ion reactions between charge asymmetric systems, from
low up to intermediate energies. We focus on isospin sensitive observables,
aiming at extracting information on the density dependence of the isovector
part of the nuclear effective interaction and of the nuclear symmetry energy.
For reactions close to the Coulomb barrier, we explore the structure of
collective dipole oscillations, rather sensitive to the low-density behavior of
the symmetry energy. In the Fermi energy regime, we investigate the interplay
between dissipation mechanisms, fragmentation and isospin effects. At
intermediate energies, where regions with higher density and momentum are
reached, we discuss collective flows and their sensitivity to the momentum
dependence of the isovector interaction channel, which determines the splitting
of neutron and proton effective masses. Finally, we also discuss the isospin
effect on the possible phase transition from nucleonic matter to quark matter.
Results are critically reviewed, also trying to establish a link, when
possible, with the outcome of other transport models.


title: Vibrational stability of graphene under combined shear and axial strains

abstract:
  We study the vibrational properties of graphene under combined shear and
uniaxial tensile strain using density-functional perturbation theory. Shear
strain always causes rippling instabilities with strain-dependent direction and
wavelength; armchair strain contrasts this instability, enabling graphene
stability in a large range of combined strains. A complementary description
based on membrane elasticity theory nicely clarifies the competition of
shear-induced instability and uniaxial tension. We also report the large
strain-induced shifts of the split components of the G optical phonon line,
which may serve as a shear diagnostic. As to the electronic properties, we find
that conical intersections move away from the Brillouin zone border under
strain, and they tend to coalesce at large strains, making the opening of gaps
difficult to assess. By a detailed search, we find that even at large strains,
only small gaps in the tens-of-meV range open at the former Dirac points.


title: Clifford-Wolf homogeneous Finsler metrics on spheres

abstract:
  An isometry of a Finsler space is called Clifford-Wolf translation
(CW-translation) if it moves all points the same distance. A Finsler space $(M,
F)$ is called Clifford-Wolf homogeneous (CW-homogeneous) if for any $x, y\in M$
there is a CW-translation $\sigma$ such that $\sigma (x)=y$. We prove that if
$F$ is a homogeneous Finsler metric on the sphere $S^n$ such that $(S^n, F)$ is
CW-homogeneous, then $F$ must be a Randers metric. This gives a complete
classification of CW-homogeneous Finsler metrics on spheres.


title: Simulating electron energy loss spectroscopy with the MNPBEM toolbox

abstract:
  Within the MNPBEM toolbox, we show how to simulate electron energy loss
spectroscopy (EELS) of plasmonic nanoparticles using a boundary element method
approach. The methodology underlying our approach closely follows the concepts
developed by Garcia de Abajo and coworkers [for a review see Rev. Mod. Phys.
82, 209 (2010)]. We introduce two Matlab classes that allow in combination with
our recently developed MNPBEM toolbox for a simple, robust, and efficient
computation of EEL spectra and maps. The classes are accompanied by a number of
demo programs for EELS simulation of metallic nanospheres, nanodisks, and
nanotriangles, and for electron trajectories passing by or penetrating through
the metallic nanoparticles. We also discuss how to compute electric fields
induced by the electron beam and cathodoluminescence.


title:
Influences of statistics and initial size fluctuation on high-order
  cumulants of conserved quantities in relativistic heavy ion collisions

abstract:
  By the generator of the UrQMD model, event statistics for the products of
kurtosis ($\kappa$) and variance ($\sigma^2$) of net-proton and net-charge
multiplicity distributions are carefully studied. It is shown that the
statistics at RHIC/BES below $\sqrt {s_{NN}} < 19.6$ GeV are not sufficient for
using the method of Centrality Bin Width Correction (CBWC). Corresponding
results are systematically underestimated. A way to improve the CBWC method is
proposed. It can remove the statistics dependence of the data and reduce the
initial size fluctuation as well.


title:
A semi-automatic semantic method for mapping SNOMED CT concepts to VCM
  Icons

abstract:
  VCM (Visualization of Concept in Medicine) is an iconic language for
representing key medical concepts by icons. However, the use of this language
with reference terminologies, such as SNOMED CT, will require the mapping of
its icons to the terms of these terminologies. Here, we present and evaluate a
semi-automatic semantic method for the mapping of SNOMED CT concepts to VCM
icons. Both SNOMED CT and VCM are compositional in nature; SNOMED CT is
expressed in description logic and VCM semantics are formalized in an OWL
ontology. The proposed method involves the manual mapping of a limited number
of underlying concepts from the VCM ontology, followed by automatic generation
of the rest of the mapping. We applied this method to the clinical findings of
the SNOMED CT CORE subset, and 100 randomly-selected mappings were evaluated by
three experts. The results obtained were promising, with 82 of the SNOMED CT
concepts correctly linked to VCM icons according to the experts. Most of the
errors were easy to fix.


title: The quenched limiting distributions of a charged-polymer model

abstract:
  The limit distributions of the charged-polymer Hamiltonian of Kantor and
Kardar [Bernoulli case] and Derrida, Griffiths and Higgs [Gaussian case] are
considered. Two sources of randomness enter in the definition: a random field
$q= (q_i)_{i\geq 1}$ of i.i.d. random variables (called random charges) and a
random walk $S = (S_n)_{n \in \mathbb{N}}$ evolving in $\mathbb{Z}^d$,
independent of the charges. The energy or Hamiltonian $K = (K_n)_{n \geq 2}$ is
then defined as $$K_n := \sum_{1\leq i < j\leq n} q_i q_j {\bf
1}_{\{S_i=S_j\}}.$$ The law of $K$ under the joint law of $q$ and $S$ is called
"annealed", and the conditional law given $q$ is called "quenched". Recently,
strong approximations under the annealed law were proved for $K$. In this paper
we consider the limit distributions of $K$ under the quenched law.


title:
Tropical Grassmannian and Tropical Linear Varieties from phylogenetic
  trees

abstract:
  In this paper we study tropicalization of Grassmannian and linear varieties.
In particular, we study the tropical linear spaces cor- responding to the
phylogenetic trees. We prove that corresponding to each subtree of the
phylogenetic tree there is a point on the tropical grassmannian. We deduce a
necessary and sufficient condition for it to be on the facet of the tropical
linear space.


title:
Compressible Fluids in the Membrane Paradigm: non-AdS Fluid/Gravity
  correspondences

abstract:
  Correspondences between black holes and fluids have been discussed in two
different frameworks, the Fluid/Gravity correspondence and membrane paradigm.
Recently, it has been discussed that these two theories can be understood as
the same theory if the cutoff surface is placed slightly outside the horizon.
The bulk viscosity is different for these two theories, but it does not
contribute to physics since the fluid becomes incompressible in the near
horizon limit. In the AdS/CFT correspondence, it is known that the fluid
becomes compressible and the bulk viscosity is zero, apart from the near
horizon limit. In this paper, we consider the Fluid/Gravity correspondence in
asymptotically non-AdS geometries. We put the cutoff surface near but at a
finite distance from the horizon. Then, the model becomes the membrane paradigm
with compressible fluid. We show that the bulk viscosity is not negative at
least within the linear response regime. We also discuss the higher derivative
corrections in the stress-energy tensor.


title:
Nonlinear metastability for a parabolic system of reaction-diffusion
  equations

abstract:
  We consider a system of reaction-diffusion equations in a bounded interval of
the real line, with emphasis on the metastable dynamics, whereby the
time-dependent solution approaches its steady state in an asymptotically
exponentially long time interval as the viscosity coefficient $\varepsilon>0$
goes to zero. To rigorous describe such behavior, we analyze the dynamics of
solutions in a neighborhood of a one-parameter family of approximate steady
states, and we derive an ODE for the position of the internal interfaces.


title:
Multidimensional BSDEs with uniformly continuous generators and general
  time intervals

abstract:
  This paper is devoted to solving a multidimensional backward stochastic
differential equation with a general time interval, where the generator is
uniformly continuous in $(y,z)$ non-uniformly with respect to $t$. By
establishing some results on deterministic backward differential equations with
general time intervals, and by virtue of Girsanov's theorem and convolution
technique, we establish a new existence and uniqueness result for solutions of
this kind of backward stochastic differential equations, which extends the
results of Hamadene (2003) and Fan, Jiang, Tian (2011) to the general time
interval case.


title: Magnetic systems at criticality: different signatures of scaling

abstract:
  Different aspects of critical behaviour of magnetic materials are presented
and discussed. The scaling ideas are shown to arise in the context of purely
magnetic properties as well as in that of thermal properties as demonstrated by
magnetocaloric effect or combined scaling of excess entropy and order
parameter. Two non-standard approaches to scaling phenomena are described. The
presented concepts are exemplified by experimental data gathered on four
representatives of molecular magnets.


title: Complex Classical Mechanics of a QES Potential

abstract:
  We consider a Parity-time (PT) invariant non-Hermitian quasi-exactly solvable
(QES) potential which exhibits PT phase transition. We numerically study this
potential in a complex plane classically to demonstrate different quantum
effects. The particle with real energy makes closed orbits around one of the
periodic wells of the complex potential depending on the initial condition.
However interestingly the particle can have open orbits even with real energy
if it is initially placed in certain region between the two wells on the same
side of the imaginary axis. On the other hand when the particle energy is
complex the trajectory is open and the particle tunnels back and forth between
two wells which are separated by a classically forbidden path. The tunneling
time is calculated for different pair of wells and is shown to vary inversely
with the imaginary component of energy. At the classical level unlike the
analogous quantum situation we do not see any qualitative differences in the
features of the particle dynamics for PT symmetry broken and unbroken phases.


title: Quantum Torus symmetry of the KP, KdV and BKP hierarchies

abstract:
  In this paper, we construct the quantum Torus symmetry of the KP hierarchy
and further derive the quantum torus constraint on the tau function of the KP
hierarchy. That means we give a nice representation of the quantum Torus Lie
algebra in the KP system by acting on its tau function. Comparing to the
$W_{\infty}$ symmetry, this quantum Torus symmetry has a nice algebraic
structure with double indices. Further by reduction, we also construct the
quantum Torus symmetries of the KdV and BKP hierarchies and further derive the
quantum Torus constraints on their tau functions. These quantum Torus
constraints might have applications in the quantum field theory, supersymmetric
gauge theory and so on.


title:
An averaging theorem for nonlinear Schr\"odinger equations with small
  nonlinearities

abstract:
  Consider nonlinear Schr\"odinger equations with small nonlinearities
  \[\frac{d}{dt}u+i(-\triangle u+V(x)u)=\epsilon \mathcal{P}(\triangle
u,u,x),\quad x\in \mathbb{T}^d.\eqno{(*)}\]
  Let $\{\zeta_1(x),\zeta_2(x),\dots\}$ be the $L_2$-basis formed by
eigenfunctions of the operator $-\triangle +V(x)$. For any complex function
$u(x)$, write it as \mbox{$u(x)=\sum_{k\geqslant1}v_k\zeta_k(x)$} and set
$I_k(u)=\frac{1}{2}|v_k|^2$. Then for any solution $u(t,x)$ of the linear
equation $(*)_{\epsilon=0}$ we have $I(u(t,\cdot))=const$. In this work it is
proved that if $(*)$ is well posed on time-intervals $t\lesssim \epsilon^{-1}$
and satisfies there some mild a-priori assumptions, then for any its solution
$u^{\epsilon}(t,x)$, the limiting behavior of the curve
$I(u^{\epsilon}(t,\cdot))$ on time intervals of order $\epsilon^{-1}$, as
$\epsilon\to0$, can be uniquely characterized by solutions of a certain
well-posed effective equation.


title: Template-Based Active Contours

abstract:
  We develop a generalized active contour formalism for image segmentation
based on shape templates. The shape template is subjected to a restricted
affine transformation (RAT) in order to segment the object of interest. RAT
allows for translation, rotation, and scaling, which give a total of five
degrees of freedom. The proposed active contour comprises an inner and outer
contour pair, which are closed and concentric. The active contour energy is a
contrast function defined based on the intensities of pixels that lie inside
the inner contour and those that lie in the annulus between the inner and outer
contours. We show that the contrast energy functional is optimal under certain
conditions. The optimal RAT parameters are computed by maximizing the contrast
function using a gradient descent optimizer. We show that the calculations are
made efficient through use of Green's theorem. The proposed formalism is
capable of handling a variety of shapes because for a chosen template,
optimization is carried with respect to the RAT parameters only. The proposed
formalism is validated on multiple images to show robustness to Gaussian and
Poisson noise, to initialization, and to partial loss of structure in the
object to be segmented.


title: Calibration estimation in dual frame surveys

abstract:
  Survey statisticians make use of the available auxiliary information to
improve estimates. One important example is given by calibration estimation,
that seeks for new weights that are close (in some sense) to the basic design
weights and that, at the same time, match benchmark constraints on available
auxiliary information. Recently, multiple frame surveys have gained much
attention and became largely used by statistical agencies and private
organizations to decrease sampling costs or to reduce frame undercoverage
errors that could occur with the use of only a single sampling frame. Much
attention has been devoted to the introduction of different ways of combining
estimates coming from the different frames. We will extend the calibration
paradigm, developed so far for one frame surveys, to the estimation of the
total of a variable of interest in dual frame surveys as a general tool to
include auxiliary information, also available at different levels. In fact,
calibration allows us to handle different types of auxiliary information and
can be shown to encompass as a special cases some of the methods already
proposed in the literature. The theoretical properties of the proposed class of
estimators are derived and discussed, a set of simulation studies is conducted
to compare the efficiency of the procedure in presence of different sets of
auxiliary variables. Finally, the proposed methodology is applied to data from
the Barometer of Culture of Andalusia survey.


title:
Metastable dynamics of internal interfaces for a
  convection-reaction-diffusion equation

abstract:
  We study a one dimensional metastable dynamics of internal interfaces for the
initial boundary value problem for the following convection-reaction-diffusion
equation \begin{equation*} \partial_t u = \varepsilon \partial_x^2 u
-\partial_x f(u)+ f'(u). \end{equation*} A metastable behavior appears when the
time-dependent solution develops into a layered function in a relatively short
time, and subsequent approaches its steady state in a very long time interval.
A rigorous analysis is used to study such behavior, by means of the
construction of a one-parameter family $\{ U^\varepsilon(x;\xi)\}_\xi$ of
approximate stationary solutions and of a linearization of the original system
around an element of this family. We obtain a system consisting in an ODE for
the parameter $\xi$, describing the position of the interface, coupled with a
PDE for the perturbation $v$, defined as the difference $v:=u-U^\varepsilon$.
The key of our analysis are the spectral properties of the linearized operator
around an element of the family $\{ U^\varepsilon \}$: the presence of a first
eigenvalue, small with respect to $\varepsilon$, leads to a metastable behavior
when $\varepsilon \ll 1$.


title: Quantum memory for light: large efficiency at telecom wavelength

abstract:
  We implement the ROSE protocol in an erbium doped solid, compatible with the
telecom range. The ROSE scheme is an adaptation of the standard 2-pulse photon
echo to make it suitable for a quantum memory. We observe an efficiency of 40%
in a forward direction by using specific orientations of the light
polarizations, magnetic field and crystal axes.


title: Kondo Destruction and Quantum Criticality in Kondo Lattice Systems

abstract:
  Considerable efforts have been made in recent years to theoretically
understand quantum phase transitions in Kondo lattice systems. A particular
focus is on Kondo destruction, which leads to quantum criticality that goes
beyond the Landau framework of order-parameter fluctuations. This
unconventional quantum criticality has provided an understanding of the unusual
dynamical scaling observed experimentally. It has also predicted a sudden jump
of the Fermi surface and an extra (Kondo destruction) energy scale, both of
which have been verified by systematic experiments. Considerations of Kondo
destruction have in addition yielded a global phase diagram, which has
motivated the current interest in heavy fermion materials with variable
dimensionality or geometrical frustration. Here we summarize these
developments, and discuss some of the ongoing work and open issues. We also
consider the implications of these results for superconductivity. Finaly, we
address the effect of spin-orbit coupling on the global phase diagram, suggest
that SmB6 under pressure may display unconventional superconductivity in the
transition regime between a Kondo insulator phase and an antiferroamgnetic
metal phase, and argue that the interfaces of heavy-fermion heterostructures
will provide a fertile setting to explore topological properties of both Kondo
insulators and heavy-fermion superconductors.


title: Properties of star forming galaxies in AKARI Deep Field-South

abstract:
  The main aim of this work is the characterization of physical properties of
galaxies detected in the far infrared (FIR) in the AKARI Deep Field-South
(ADF-S) survey. Starting from a catalog of the 1 000 brightest ADF-S sources in
the WIDE-S (90$\mu$m) AKARI band, we constructed a subsample of galaxies with
spectral coverage from the ultraviolet to the far infrared. We then analyzed
the multiwavelength properties of this 90$\mu$m selected sample of galaxies.
For galaxies without known spectroscopic redshifts we computed photometric
redshifts using the codes Photometric Analysis for Redshift Estimate (Le PHARE)
and Code Investigating GALaxy Emission (CIGALE), tested these photometric
redshifts using spectroscopic redshifts, and compared the performances of both
codes. To test the reliability of parameters obtained by fitting spectral
energy distributions, a mock cataloge was generated. We built a large
multiwavelength catalog of more than 500 ADF-S galaxies. We successfully fitted
Spectral Energy Distributions of 186 galaxies with $\rm{\chi^2_{min}<4}$, and
analyzed the output parameters of the fits. We conclude that our sample
consists mostly of nearby actively star-forming galaxies, and all our galaxies
have a relatively high metallicity. We estimated photometric redshifts for 113
galaxies from the whole ADF-S sample. Comparing the performance of Le PHARE and
CIGALE, we found that CIGALE gives more reliable redshift estimates for our
galaxies, which implies that including the IR photometry allows for substantial
improvement of photometric redshift estimation.


title: Investigating amorphous order in stable glasses by random pinning

abstract:
  We use a random pinning procedure to investigate stable glassy states
associated with large deviations of the activity in a model glass-former. We
pin particles both from active (equilibrium) configurations and from stable
(inactive) glassy states. By comparing the distribution of the overlap between
states that share pinned particles, we infer that the inactive states are
characterised by a structural length scale that is comparable with the system
size. This is a manifestation of amorphous order in these glassy states, which
helps to explain their stability.


title: Lattice-site-specific spin-dynamics in double perovskite Sr2CoOsO6

abstract:
  We have studied the magnetic properties and spin-dynamics of the
structurally-ordered double perovskite Sr$_2$CoOsO$_6$. Our neutron
diffraction, muon spin relaxation and ac-susceptibility measurements reveal two
antiferromagnetic (AFM) phases on cooling from room temperature down to 2 K. In
the first AFM phase, with transition temperature $T_{\mathrm{N}}=108$ K, cobalt
(3$d^7$, $S=3/2$) and osmium (5$d^2$, $S=1$) moments fluctuate dynamically,
while their \textit{average} effective moments undergo long-range order. In the
second AFM phase with $T_{\mathrm{N}}=67$ K, cobalt moments first become frozen
and induce a noncollinear spin-canted AFM state, while dynamically fluctuating
osmium moments are later frozen into a randomly canted state at $T\approx 5$ K.
Our \textit{ab initio} calculations indicate that the effective exchange
coupling between cobalt and osmium sites is rather weak, so that cobalt and
osmium sublattices exhibit different ground states and spin-dynamics, making
Sr$_2$CoOsO$_6$ distinct from previously reported double-perovskite compounds.


title:
The Relevance of Assumptions and Context Factors for the Integration of
  Inspections and Testing

abstract:
  Integrating inspection processes with testing processes promises to deliver
several benefits, including reduced effort for quality assurance or higher
defect detection rates. Systematic integration of these processes requires
knowledge regarding the relationships between these processes, especially
regarding the relationship between inspection defects and test defects. Such
knowledge is typically context-dependent and needs to be gained analytically or
empirically. If such kind of knowledge is not available, assumptions need to be
made for a specific context. This article describes the relevance of
assumptions and context factors for integrating inspection and testing
processes and provides mechanisms for deriving assumptions in a systematic
manner.


title:
Wojtek Dziembowski: selected photos and events of his scientific
  biography

abstract:
  Selected events of the scientific biography of Wojtek Dziembowski are briefly
described, and several related photos are presented. The full version of the
presentation is available at the IAU Symposium 301 webpage.


title:
Exclusive photoproduction of quarkonium in proton-nucleus collisions at
  energies available at the CERN Large Hadron Collider

abstract:
  In this work we investigate the coherent photoproduction of psi(1S), psi(2S)
and Upsilon (1S) states in the proton-nucleus collisions in the LHC energies.
Predictions for the rapidity distributions are presented using the color dipole
formalism and including saturation effects that are expected to be relevant at
high energies. Calculations are done at the energy 5.02 TeV and also for the
next LHC run at 8.8 TeV in proton-lead mode. Discussion is performed on the
main theoretical uncertainties associated to the calculations.


title: Predicting the growth rate of helium bubbles in metal tritide

abstract:
  Helium bubbles nucleation and growth in metals or metal tritide is a
long-standing problem attracting considerable attention in nuclear industry but
the mechanism remains indistinct and predicting the growth rate of helium
bubble is inexistence still up to new. Here, the rate of helium bubbles
nucleation and growth in metal tritide is developed based on a dynamical model,
which describes the diameter of helium bubbles increasing linearly as t**(1/3)
in titanium tritide at room temperature, agreeing quite well with the
experimental phenomenon. The way of reducing storage temperature from 300 to
225 K or increasing the helium atoms diffusion barrier from 0.81 to 1.1 eV can
effectively restrain bubbles growth and prolong lifetime of titanium tritide
more than 4 times, which provides a useful reference to relevant experiment
exploration and applications. This model also can be used to predict lifetime
of new tritium-storage materials and plasma facing materials in nuclear
industry.


title: On global location-domination in graphs

abstract:
  A dominating set $S$ of a graph $G$ is called locating-dominating, LD-set for
short, if every vertex $v$ not in $S$ is uniquely determined by the set of
neighbors of $v$ belonging to $S$. Locating-dominating sets of minimum
cardinality are called $LD$-codes and the cardinality of an LD-code is the
location-domination number $\lambda(G)$. An LD-set $S$ of a graph $G$ is global
if it is an LD-set of both $G$ and its complement $\overline{G}$. The global
location-domination number $\lambda_g(G)$ is the minimum cardinality of a
global LD-set of $G$. In this work, we give some relations between
locating-dominating sets and the location-domination number in a graph and its
complement.


title: Influence of free carriers on exciton ground states in quantum wells

abstract:
  The influence of free carriers on the ground state of the exciton at zero
magnetic field in a quasi-two-dimensional quantum well doped with electrons is
considered in the framework of the random phase approximation. The effects of
the exciton-charge-density interaction and the inelastic scattering processes
due to the Hartree-Fock electron-electron exchange interaction are taken into
account. The effect of phase-space filling is considered using an approximate
approach. The results of the calculation are compared with the experimental
data available.


title:
A study of self-consistent Hartree-Fock plus Bardeen-Cooper-Schrieffer
  calculations with finite-range interactions

abstract:
  In this work we test the validity of a Hartree-Fock plus
Bardeen-Cooper-Schrieffer model in which a finite-range interaction is used in
the two steps of the calculation by comparing the results obtained to those
found in a fully self-consistent Hartree-Fock-Bogoliubov calculations using the
same interaction.Specifically, we consider the Gogny-type D1S and D1M forces.
We study a wide range of spherical nuclei, far from the stability line, in
various regions of the nuclear chart, from oxygen to tin isotopes. We calculate
various quantities related to the ground state properties of these nuclei, such
as binding energies, radii, charge and density distributions and elastic
electron scattering cross sections. The pairing effects are studied by direct
comparison with the Hartree-Fock results. Despite of its relative simplicity,
in most of the cases, our model provides results very close to those of the
Hartree-Fock-Bogoliubov calculations, and it reproduces rather well the
empirical evidences of pairing effects in the nuclei investigated.


title: Gravitational self-torque and spin precession in compact binaries

abstract:
  We calculate the effect of self-interaction on the "geodetic" spin precession
of a compact body in a strong-field orbit around a black hole. Specifically, we
consider the spin precession angle $\psi$ per radian of orbital revolution for
a particle carrying mass $\mu$ and spin $s \ll (G/c) \mu^2$ in a circular orbit
around a Schwarzschild black hole of mass $M \gg \mu$. We compute $\psi$
through $O(\mu/M)$ in perturbation theory, i.e, including the correction
$\delta\psi$ (obtained numerically) due to the torque exerted by the
conservative piece of the gravitational self-field. Comparison with a
post-Newtonian (PN) expression for $\delta\psi$, derived here through 3PN
order, shows good agreement but also reveals strong-field features which are
not captured by the latter approximation. Our results can inform
semi-analytical models of the strong-field dynamics in astrophysical binaries,
important for ongoing and future gravitational-wave searches.


title: Applications of Large Eddy Simulation methods to gyrokinetic turbulence

abstract:
  The Large Eddy Simulation (LES) approach - solving numerically the large
scales of a turbulent system and accounting for the small-scale influence
through a model - is applied to nonlinear gyrokinetic systems that are driven
by a number of different microinstabilities. Comparisons between modeled, lower
resolution, and higher resolution simulations are performed for an experimental
measurable quantity, the electron density fluctuation spectrum. Moreover, the
validation and applicability of LES is demonstrated through a series of
diagnostics based on the free energetics of the system.


title: Modeling of the Radio Emission from the Vela Supernova Remnant

abstract:
  Supernova remnants (SNRs) are widely considered to be sites of Galactic
cosmic ray (CR) acceleration. Vela is one of the nearest Galactic composite
SNRs to Earth accompanied by the Vela pulsar and its pulsar wind nebula (PWN)
Vela X. The Vela SNR is one of the most studied remnants and it benefits from
precise estimates of various physical parameters such as distance and age.
Therefore, it is a perfect object for a detailed study of physical processes in
SNRs. The Vela SNR expands into the highly inhomogeneous cloudy interstellar
medium (ISM) and its dynamics is determined by the heating and evaporation of
ISM clouds. It features an asymmetrical X-ray morphology which is explained by
the expansion into two media with different densities. This could occur if the
progenitor of the Vela SNR exploded close to the edge of the stellar wind
bubble of the nearby Wolf-Rayet star $\gamma^2$Velorum and hence one part of
the remnant expands into the bubble. The interaction of the ejecta and the main
shock of the remnant with ISM clouds causes formation of secondary shocks at
which additional particle acceleration takes place. This may lead to the close
to uniform distribution of relativistic particles inside the remnant. We
calculate the synchrotron radio emission within the framework of the new
hydrodynamical model which assumes the supernova explosion at the edge of the
stellar wind bubble. The simulated radio emission agrees well with both the
total radio flux from the remnant and the complicated radio morphology of the
source.


title:
Dependence of the cross polar cap potential saturation on the type of
  solar wind streams

abstract:
  We compare of the cross polar cap potential (CPCP) saturation during magnetic
storms induced by various types of the solar wind drivers. By using the model
of Siscoe-Hill
\citep{Hilletal1976,Siscoeetal2002a,Siscoeetal2002b,Siscoeetal2004,Siscoe2011}
we evaluate criteria of the CPCP saturation during the main phases of 257
magnetic storms ($Dst_{min} \le -50$ nT) induced by the following types of the
solar wind streams: magnetic clouds (MC), Ejecta, the compress region Sheath
before MC ($Sh_{MC}$) and before Ejecta ($Sh_{E}$), corotating interaction
regions (CIR) and indeterminate type (IND). Our analysis shows that occurrence
rate of the CPCP saturation is higher for storms induced by ICME ($13.2%$) than
for storms driven by CIR ($3.5%$) or by IND ($3.5%$).The CPCP saturation was
obtained more often for storms initiated by MC ($25%$) than by Ejecta ($2.9%$);
it was obtained for $8.6%$ of magnetic storms induced by sum of MC and Ejecta,
and for $21.5%$ magnetic storms induced by Sheath before them (sum of $Sh_{MC}$
and $Sh_{E}$). These results allow us to conclude that occurrence rate of the
CPCP saturation at the main phase of magnetic storms depends on the type of the
solar wind stream.


title: Reduced modified Chaplygin gas cosmology

abstract:
  In this paper, we study cosmologies containing the reduced modified Chaplygin
gas (RMCG) fluid which is reduced from the modified Chaplygin gas
$p=A\rho-B\rho^{-\alpha}$ for the value of $\alpha=-1/2$. In this special case,
dark cosmological models can be realized for different values of model
parameter $A$. We investigate the viabilities of these dark cosmological models
by discussing the evolutions of cosmological quantities and using the currently
available cosmic observations. It is shown that the special RMCG model ($A=0$
or $A=1$) which unifies the dark matter and dark energy should be abandoned.
For $A=1/3$, RMCG which unifies the dark energy and dark radiation is the
favorite model according to the objective Akaike information criteria. In the
case of $A<0$, RMCG can achieve the features of the dynamical quintessence and
phantom models, where the evolution of the universe is not sensitive to the
variation of model parameters.


title:
Te 5p orbitals bring three-dimensional electronic structure to
  two-dimensional Ir0.95Pt0.05Te2

abstract:
  We have studied the nature of the three-dimensional multi-band electronic
structure in the twodimensional triangular lattice Ir1-xPtxTe2 (x=0.05)
superconductor using angle-resolved photoemission spectroscopy (ARPES), x-ray
photoemission spectroscopy (XPS) and band structure calculation. ARPES results
clearly show a cylindrical (almost two-dimensional) Fermi surface around the
zone center. Near the zone boundary, the cylindrical Fermi surface is truncated
into several pieces in a complicated manner with strong three-dimensionality.
The XPS result and the band structure calculation indicate that the strong Te
5p-Te 5p hybridization between the IrTe2 triangular lattice layers is
responsible for the three-dimensionality of the Fermi surfaces and the
intervening of the Fermi surfaces observed by ARPES.


title:
Recursive maximum likelihood identification of jump Markov nonlinear
  systems

abstract:
  In this contribution, we present an online method for joint state and
parameter estimation in jump Markov non-linear systems (JMNLS). State inference
is enabled via the use of particle filters which makes the method applicable to
a wide range of non-linear models. To exploit the inherent structure of JMNLS,
we design a Rao-Blackwellized particle filter (RBPF) where the discrete mode is
marginalized out analytically. This results in an efficient implementation of
the algorithm and reduces the estimation error variance. The proposed RBPF is
then used to compute, recursively in time, smoothed estimates of complete data
sufficient statistics. Together with the online expectation maximization
algorithm, this enables recursive identification of unknown model parameters.
The performance of the method is illustrated in simulations and on a
localization problem in wireless networks using real data.


title:
Sensitivity of reaction cross sections to halo nucleus density
  distributions

abstract:
  In order to clear up the sensitivity of the nucleus--nucleus reaction cross
sections $\sigma_R$ to the nuclear matter distributions in exotic halo nuclei,
we have calculated the values of $\sigma_R$ for scattering of $^6$He,
$^{11}$Li, and $^{19}$C nuclei on several nuclear targets at the energy of 0.8
GeV/nucleon. The calculations were performed in the "rigid target"
approximation to the Glauber theory, different shapes of the nuclear density
distributions in $^6$He, $^{11}$Li, and $^{19}$C being assumed.


title: Evolution of contractions by mean curvature flow

abstract:
  We investigate length decreasing maps $f:M\to N$ between Riemannian manifolds
$M$, $N$ of dimensions $m\ge 2$ and $n$, respectively. Assuming that $M$ is
compact and $N$ is complete such that
$$\sec_M>-\sigma\quad\text{and}\quad{\Ric}_M\ge(m-1)\sigma\ge(m-1)\sec_N\ge-\mu,$$
where $\sigma$, $\mu$ are positive constants, we show that the mean curvature
flow provides a smooth homotopy of $f$ into a constant map.


title: Energy conditions in modified gravity

abstract:
  We consider generalized energy conditions in modified theories of gravity by
taking into account the further degrees of freedom related to scalar fields and
curvature invariants. The latter are usually recast as generalized {\it
geometrical fluids} that have different meanings with respect to the standard
matter fluids generally adopted as sources of the field equations. More
specifically, in modified gravity the curvature terms are grouped in a tensor
$H^{ab}$ and a coupling $g(\Psi^i)$ that can be reorganized in effective
Einstein field equations, as corrections to the energy-momentum tensor of
matter. The formal validity of such inequalities does not assure some basic
requirements such as the attractive nature of gravity, so that the energy
conditions have to be considered in a wider sense.


title:
High-Order Coupled Cluster Method Calculations using Three-Dimensional
  Model States: An Illustration for the Triangular-Lattice Antiferromagnet in
  an External Field

abstract:
  The coupled cluster method (CCM) has previously been applied to study the
ground- and excited-state properties of many different types of frustrated and
unfrustrated quantum spin systems. A common feature in the application of the
CCM is to rotate the local spin axes of the (often classical) model state so
that (notationally only) the spins all appear to point in the downwards
$z$-direction. Hitherto, we remark that only coplanar model states have been
used because they do not lead to imaginary terms in the new Hamiltonian. By
contrast, non-coplanar "three-dimensional" (3D) model states can lead to
imaginary terms in the new Hamiltonian after rotation. In principle, however,
macroscopic quantities predicted by the CCM (such as the ground-state energy
and order parameter) should still be real (even though the Hamiltonian may be
complex) because the transformations of local spin axes are unitary. Here we
explain how we may use such 3D model states for the CCM and how we may solve
for the (now possibly complex) CCM correlation coefficients. We present results
for the spin-half triangular-lattice antiferromagnet in an external magnetic
field. We use both coplanar model states and a single 3D non-coplanar model
state. We calculate the ground-state energy and the lattice magnetisation as a
function of the magnetic field strength. We find that the energies of the
coplanar states lie lower than that of the non-coplanar state for all values of
the external field, as seen in other approximate studies for this model. We
find that the non-coplanar state does not detect the well-known spin plateau
occurring in this model, although (as seen before) it is clearly observed for
the coplanar model states using the CCM. These results are an excellent initial
validation of the new approach for the application of the CCM using 3D model
states.


title: Image Representation Learning Using Graph Regularized Auto-Encoders

abstract:
  We consider the problem of image representation for the tasks of unsupervised
learning and semi-supervised learning. In those learning tasks, the raw image
vectors may not provide enough representation for their intrinsic structures
due to their highly dense feature space. To overcome this problem, the raw
image vectors should be mapped to a proper representation space which can
capture the latent structure of the original data and represent the data
explicitly for further learning tasks such as clustering.
  Inspired by the recent research works on deep neural network and
representation learning, in this paper, we introduce the multiple-layer
auto-encoder into image representation, we also apply the locally invariant
ideal to our image representation with auto-encoders and propose a novel
method, called Graph regularized Auto-Encoder (GAE). GAE can provide a compact
representation which uncovers the hidden semantics and simultaneously respects
the intrinsic geometric structure.
  Extensive experiments on image clustering show encouraging results of the
proposed algorithm in comparison to the state-of-the-art algorithms on
real-word cases.


title: GL(3,C) Invariance of Type B 3-fold Supersymmetric Systems

abstract:
  Type B 3-fold supersymmetry is a necessary and sufficient condition for a
quantum Hamiltonian to admit three linearly independent local solutions in
closed form. We show that any such a system is invariant under GL(3,C)
homogeneous linear transformations. In particular, we prove explicitly that the
parameter space is transformed as an adjoint representation of it and that
every coefficient of the characteristic polynomial appeared in 3-fold
superalgebra is algebraic invariants. In the type A case, it includes as a
subgroup the GL(2,C) linear fractional transformation studied in the
literature. We argue that any N-fold supersymmetric system has a GL(N,C)
invariance for an arbitrary integral N.


title:
A compact formula for the derivative of a 3-D rotation in exponential
  coordinates

abstract:
  We present a compact formula for the derivative of a 3-D rotation matrix with
respect to its exponential coordinates. A geometric interpretation of the
resulting expression is provided, as well as its agreement with other
less-compact but better-known formulas. To the best of our knowledge, this
simpler formula does not appear anywhere in the literature. We hope by
providing this more compact expression to alleviate the common pressure to
reluctantly resort to alternative representations in various computational
applications simply as a means to avoid the complexity of differential analysis
in exponential coordinates.


title: Explicit minimal resolution for certain monomial curves

abstract:
  With a view to study problems of smoothability, we construct a minimal free
resolution for the coordinate ring of an algebroid monomial curve associated to
an $AS$ numerical semigroup (i.e. generated by an arithmetic sequence),
obtained independently of the result of \cite{gss2} and equipped with the
explicit description of all the involved maps.


title:
Test Set Selection using Active Information Acquisition for Predictive
  Models

abstract:
  In this paper, we consider active information acquisition when the prediction
model is meant to be applied on a targeted subset of the population. The goal
is to label a pre-specified fraction of customers in the target or test set by
iteratively querying for information from the non-target or training set. The
number of queries is limited by an overall budget. Arising in the context of
two rather disparate applications- banking and medical diagnosis, we pose the
active information acquisition problem as a constrained optimization problem.
We propose two greedy iterative algorithms for solving the above problem. We
conduct experiments with synthetic data and compare results of our proposed
algorithms with few other baseline approaches. The experimental results show
that our proposed approaches perform better than the baseline schemes.