title:
Frustration effect on magnetic excitations in a two-leg spin-ladder
  system

abstract:
  We theoretically study the magnetic excitations in a frustrated two-leg
spin-ladder system, in which antiferromagnetic exchange interactions act on the
nearest-neighbor and next-nearestneighbor bonds in the leg direction, and on
the nearest-neighbor bonds in the rung direction. A dynamical spin correlation
function at zero temperature is calculated by using the dynamical
density-matrix renormalization-group method for possible magnetic phases, i.e.,
columnar-dimer and rung-singlet phases. The columnar-dimer phase is
characterized by multi-spinon excitations with spin gap, while the rung-singlet
phase is dominated by the triplet excitation in the rung direction. It is found
that a major difference between these two phases appears in the spectral weight
of magnetic excitations, in particular, of the bonding and anti-bonding modes
in the rung direction. Therefore, we can distinguish one phase from the other
by the difference of the spectral weight. Furthermore, we examine frustration
effect on both modes in the rung-singlet phase with a perturbation theory from
the strong coupling limit. It is shown that the anti-bonding mode is stable
against the frustration, and a wavenumber with minimum excitation energy is
shifted from the commensurate to incommensurate ones. On the other hand, the
bonding mode is merged into the continuum excitation of multiple triplet
excitations by increasing the frustration. By comparing our results with
inelastic neutron scattering experiments for BiCu$_2$PO$_6$, the magnitude of
the magnetic exchange interactions and the ground state will be determined.


title: Chemical evolution in star clusters: the role of mass and environment

abstract:
  The process of chemical self-enrichment in stellar systems can be affected by
the total mass of the system and the conditions of the large-scale environment.
Globular clusters are a special dark matter-free case of chemical evolution, in
which the only self-enrichment comes from material processed in stars, and only
two bursts of star formation occur. We describe how observations of
intermediate-age star clusters in the Large Magellanic Cloud can provide
insight on the ways that mass and environment can affect the process of
chemical enrichment in star clusters.


title:
Wintgen ideal submanifolds with a low-dimensional integrable
  distribution (I)

abstract:
  A submanifold in space forms satisfies the well-known DDVV inequality due to
De Smet, Dillen, Verstraelen and Vrancken. The submanifold attaining equality
in the DDVV inequality at every point is called Wintgen ideal submanifold. As
conformal invariant objects, Wintgen ideal submanifolds are studied in this
paper using the framework of M\"{o}bius geometry. We classify Wintgen ideal
submanfiolds of dimension $m>2$ and arbitrary codimension when a canonically
defined 2-dimensional distribution $\mathbb{D}$ is integrable. Such examples
come from cones, cylinders, or rotational submanifolds over super-minimal
surfaces in spheres, Euclidean spaces, or hyperbolic spaces, respectively.


title: Charmed baryons at the physical point in 2+1 flavor lattice QCD

abstract:
  We investigate the charmed baryon mass spectrum using the relativistic heavy
quark action on 2+1 flavor PACS-CS configurations previously generated on $32^3
\times 64$ lattice. The dynamical up-down and strange quark masses are tuned to
their physical values, reweighted from those employed in the configuration
generation. At the physical point, the inverse lattice spacing determined from
the $\Omega$ baryon mass gives $a^{-1}=2.194(10)$ GeV, and thus the spatial
extent becomes $L = 32 a = 2.88(1)$ fm. Our results for the charmed baryon
masses are consistent with experimental values, except for the mass of
$\Xi_{cc}$, which has been measured by only one experimental group so far and
has not been confirmed yet by others. In addition, we report values of other
doubly and triply charmed baryon masses, which have never been measured
experimentally.


title:
Gauge Field and Confinement-Deconfinement Transition in Hydrogen-Bonded
  Ferroelectrics

abstract:
  Quantum melting of ferroelectric moment in the frustrated hydrogen-bonded
system with "ice rule" is studied theoretically by using the quantum Monte
Carlo simulation. The large number of nearly degenerate configurations are
described as the gauge degrees of freedom, i.e., the model is mapped to a
lattice gauge theory which shows the confinement-deconfinment transition (CDT).
The dipole-dipole interaction $J_2$, on the other hand, explicitly breaks the
gauge symmetry leading to the ferroelectric transition (FT) at finite
temperature $T$. It is found that the crossover from FT to CDT manifests itself
in the reduced correlation length of the polarization $\xi_{\text{FT}} \sim
\Delta (K-K_c)^{-\nu}$ with $\Delta \propto \sqrt{J_2}$ while $K_c$ and $\nu$
remains finite in the limit $J_2 \to 0$. In contrast, the Currie-Weiss-like law
for the susceptibility $\chi$ and the spontaneous polarization behaves smoothly
and the length scale $\xi_{\text{CDT}}$, related to the molecular symmetry and
volume for CDT, does not reduce in this limit.


title: Universal tropical structures for curves in exploded manifolds

abstract:
  For any stable curve $f$ in an exploded manifold, this paper constructs a
family of curves $\hat f$ with universal tropical structure which contains $f$.
Such a family has the property that any other family of curves containing $f$
is locally a small modification of a family which factors through $\hat f$. As
such, families of curves with universal tropical structure play an important
role in the analysis of the moduli stack of curves and the construction of
Gromov-Witten invariants of exploded manifolds.


title: On the self-interaction of dark energy in a ghost-condensate model

abstract:
  In a ghost-condensate model of dark energy the combined dynamics of the
scalar field and gravitation is shown to impose non-trivial restriction on the
self-interaction of the scalar field. Using this restriction we show that the
choice of a zero self-interaction leads to a situation too restrictive for the
general evolution of the universe. This restriction, obtained in the form of a
quadratic equation of the scalar potential, is demonstrated to admit real
solutions. Also, in the appropriate limit it reproduces the potential in the
phantom cosmology.


title: Hausdorff dimension of level sets of generalized Takagi functions

abstract:
  This paper examines level sets of two families of continuous, nowhere
differentiable functions (one a subfamily of the other) defined in terms of the
"tent map". The well-known Takagi function is a special case. Sharp upper
bounds are given for the Hausdorff dimension of the level sets of functions in
these two families. Furthermore, the case where a function f is chosen at
random from either family is considered, and results are given for the
Hausdorff dimension of the zero set and the set of maximum points of f.


title: Holomorphic curves in exploded manifolds: Kuranishi structure

abstract:
  This paper constructs a Kuranishi structure for the moduli stack of
holomorphic curves in exploded manifolds. To avoid some technicalities of
abstract Kuranishi structures, we embed our Kuranishi structure inside a moduli
stack of curves. The construction also works for the moduli stack of
holomorphic curves in any compact symplectic manifold.


title: On the Behavior of the Residual in Conjugate Gradient Method

abstract:
  In conjugate gradient method, it is well known that the recursively computed
residual differs from true one as the iteration proceeds in finite arithmetic.
Some work have been devoted to analyze this be-havior and to evaluate the lower
and the upper bounds of the difference. This paper focuses on the behavior of
these two kinds of residuals, especially their lower bounds caused by the loss
of trailing digit, respectively.


title: Metallization of Magnesium Polyhydrides Under Pressure

abstract:
  Evolutionary structure searches are used to predict stable phases with unique
stoichiometries in the hydrogen-rich region of the magnesium/hydrogen phase
diagram under pressure. MgH$_4$, MgH$_{12}$ and MgH$_{16}$ are found to be
thermodynamically stable with respect to decomposition into MgH$_2$ and H$_2$
near 100 GPa, and all lie on the convex hull by 200 GPa. MgH$_4$ contains two
H$^-$ anions and one H$_2$ molecule per Mg$^{2+}$ cation, whereas the
hydrogenic sublattices of MgH$_{12}$ and MgH$_{16}$ are composed solely of
H$_2^{\delta -}$ molecules. The high-hydrogen content stoichiometries have a
large density of states at the Fermi level, and the $T_c$ of MgH$_{12}$ at 140
GPa is calculated to be nearly three times greater than that of the classic
hydride, MgH$_2$, at 180 GPa.


title: Phase transitions in Paradigm models

abstract:
  In this letter we propose two general models for paradigm shift,
deterministic propagation model (DM) and stochastic propagation model (SM). By
defining the order parameter $m$ based on the diversity of ideas, $\Delta$, we
study when and how the transition occurs as a cost $C$ in DM or an innovation
probability $\alpha$ in SM increases. In addition, we also investigate how the
propagation processes affect on the transition nature. From the analytical
calculations and numerical simulations $m$ is shown to satisfy the scaling
relation $m=1-f(C/N)$ for DM with the number of agents $N$. In contrast, $m$ in
SM scales as $m=1-f(\alpha^a N)$.


title: On topologically minimal surfaces of high genus

abstract:
  We show that a 3-manifold containing an incompressible surface has
topologically minimal surfaces of arbitrary high genus.


title: Pattern Matching for Self- Tuning of MapReduce Jobs

abstract:
  In this paper, we study CPU utilization time patterns of several MapReduce
applications. After extracting running patterns of several applications, they
are saved in a reference database to be later used to tweak system parameters
to efficiently execute unknown applications in future. To achieve this goal,
CPU utilization patterns of new applications are compared with the already
known ones in the reference database to find/predict their most probable
execution patterns. Because of different patterns lengths, the Dynamic Time
Warping (DTW) is utilized for such comparison; a correlation analysis is then
applied to DTWs outcomes to produce feasible similarity patterns. Three real
applications (WordCount, Exim Mainlog parsing and Terasort) are used to
evaluate our hypothesis in tweaking system parameters in executing similar
applications. Results were very promising and showed effectiveness of our
approach on pseudo-distributed MapReduce platforms.


title: Ferrimagnetism of dilute Ising antiferromagnets

abstract:
  It is shown that nearest-neighbor antiferromagnetic interactions of identical
Ising spins on imbalanced bipartite lattice and imbalanced bipartite
hierarchical fractal result in ferrimagnetic order instead of antiferromagnetic
one. On some crystal lattices dilute Ising antiferromagnets may also become
ferrimagnets due to the imbalanced nature of the magnetic percolation cluster
when it coexists with the percolation cluster of vacancies. As evidenced by the
existing experiments on $Fe_pZn_{1-p}F_2$, such ferrimagnetism is inherent
property of bcc lattice so thermodynamics of these compounds at low $p$ can be
similar to that of antiferromagnet on imbalanced hierarchical fractal.


title:
A tool for the morphological classification of galaxies: the
  concentration index

abstract:
  Using the galaxy data of the Sloan Digital Sky Survey Data Release 8 (SDSS
DR8), I explore whether the concentration index is a good morphological
classification tool and find that a reasonably pure late-type galaxy sample can
be constructed with the choice of r-band concentration index ci=2.85. The
opposite is not true, however, due to the fairly high contamination of an
early-type sample by late-type galaxies. In such an analysis, the influence of
selection effects is less important. To disentangle correlations of the
morphology and concentration index with stellar mass, star formation rate
(SFR), specific star formation rate (SSFR) and active galactic nucleus (AGN)
activity, I investigate correlations of the concentration index with these
properties at a fixed morphology and correlations of the morphology with these
properties at a fixed concentration index. It is found that at a fixed
morphology, high-concentration galaxies are preferentially more massive and
have a lower SFR and SSFR than low-concentration galaxies, while at a fixed
concentration index, elliptical galaxies are preferentially more massive and
have a lower SFR and SSFR than spiral galaxies. This result shows that the
stellar mass, SFR and SSFR of a galaxy are correlated with its concentration
index as well as its morphology. In addition, I note that AGNs are
preferentially found in more concentrated galaxies only in the spiral galaxy
sample.


title:
Effect of TeO2 addition on the dielectric properties of CaCu3Ti4O12
  ceramics derived from the oxalate precursor route

abstract:
  CaCu3Ti4O12 (CCTO) ceramics which has perovskite structure gained
considerable attention due to its giant permittivity. But, it has high tan
{\delta} (0.1 at 1kHz) at room temperature, which needs to be minimised to the
level of practical applications. Hence, TeO2 which is a good glass former has
been deliberately added to CCTO nano ceramic (derived from the oxalate
precursor route) to explore the possibility of reducing the dielectric loss
while maintaining the high permittivity. The structural, morphological and
dielectric properties of the pure CCTO and TeO2 added ceramics were studied
using X-ray diffraction, Scanning Electron Microscope along with Energy
Dispersive X-ray Analysis (EDX), spectroscopy and Impedance analyzer. For the
2.0 wt % TeO2 added ceramics, there is a remarkable difference in the
microstructural features as compared to that of pure CCTO ceramics. This sample
exhibited permittivity values as high as 7387 @ 10 KHz and low dielectric loss
value of 0.037 @ 10 kHz, which can be exploited for the high frequency
capacitors application.


title:
Nuclear Radio Jet from a Low-Luminosity Active Galactic Nucleus in NGC
  4258

abstract:
  The nearby low-luminosity active galactic nucleus (LLAGN) NGC 4258 has a weak
radio continuum component at the galactic center. We investigate its radio
spectral properties on the basis of our new observations using the Nobeyama
Millimeter Array at 100 GHz and archival data from the Very Large Array (VLA)
at 1.7-43 GHz and the James Clerk Maxwell telescope at 347 GHz. The NGC 4258
nuclear component exhibits (1) an intra-month variable and complicated spectral
feature at 5-22 GHz and (2) a slightly inverted spectrum at 5-100 GHz (a
spectral index of ~0.3) in time-averaged flux densities, which are also
apparent in the closest LLAGN M81. These similarities between NGC 4258 and M81
in radio spectral natures in addition to previously known core shift in their
AU-scale jet structures produce evidence that the same mechanism drives their
nuclei. We interpret the observed spectral property as the superposition of
emission spectra originating at different locations with frequency-dependent
opacity along the nuclear jet. Quantitative differences between NGC 4258 and
M81 in terms of jet/counter jet ratio, radio loudness, and degree of core shift
can be consistently understood by fairly relativistic speeds (bulk Lorentz
factors of >~ 3) of jet and their quite different inclinations. The picture
established from the two closest LLAGNs is useful for understanding the
physical origin of unresolved and flat/inverted spectrum radio cores that are
prevalently found in LLAGNs, including Sgr A*, with starved supermassive black
holes in the present-day universe.


title:
Very Long Baseline Array Imaging of Parsec-scale Radio Emissions in
  Nearby Radio-quiet Narrow-line Seyfert 1 Galaxies

abstract:
  We conducted Very Long Baseline Array (VLBA) observations of seven nearby
narrow-line Seyfert 1 (NLS1) galaxies at 1.7 GHz (18cm) with milli-arcsecond
resolution. This is the first systematic very long baseline interferometry
(VLBI) study focusing on the central parsec-scale regions of radio-quiet NLS1s.
Five of the seven were detected at a brightness temperature of >~5x10^6 K and
contain radio cores with high brightness temperatures of >6x10^7 K, indicating
a nonthermal process driven by jet-producing central engines as is observed in
radio-loud NLS1s and other active galactic nucleus (AGN) classes. VLBA images
of MRK 1239, MRK 705, and MRK 766 exhibit parsec-scale jets with clear linear
structures. A large portion of the radio power comes from diffuse emission
components that are distributed within the nuclear regions (<~300 pc), which is
a common characteristic throughout the observed NLS1s. Jet kinetic powers
limited by the Eddington limit may be insufficient to allow the jets escape to
kiloparsec scales for these radio-quiet NLS1s with low-mass black holes of
<~10^7 M_sun.


title:
Multifrequency VLBI Observations of the Broad Absorption Line Quasar
  J1020+4320: Recently Restarted Jet Activity?

abstract:
  This paper reports very-long-baseline interferometry observations of the
radio-loud broad absorption line (BAL) quasar J1020+4320 at 1.7, 2.3, 6.7, and
8.4 GHz using the Japanese VLBI network (JVN) and European VLBI network (EVN).
The radio morphology is compact with a size of ~10 pc. The convex radio
spectrum is stable over the last decade; an observed peak frequency of 3.2 GHz
is equivalent to 9.5 GHz in the rest frame, suggesting an age of the order of
~100 years as a radio source, according to an observed correlation between
linear size and peak frequency of compact steep spectrum (CSS) and giga-hertz
peaked spectrum (GPS) radio sources. A low-frequency radio excess suggests
relic of past jet activity. J1020+4320 may be one of the quasars with recurrent
and short-lived jet activity during a BAL-outflowing phase.


title: The digital laser

abstract:
  It is well-known how to control the spatial output from a laser, with most
solutions to date involving customised intra-cavity elements in the form of
apertures, diffractive optics and free-form mirrors. These optical elements
require considerable design and fabrication effort and suffer from the further
disadvantage of being immutably connected to the selection of a particular
spatial mode. Consequently, most laser systems are designed for the ubiquitous
Gaussian mode, whereas it is clear that there are many instances when a
customised mode would be preferable. We overcome these limitations with the
first digital laser, comprising an electrically addressed reflective phase-only
spatial light modulator as an intra-cavity holographic mirror. The phase and
amplitude of the holographic mirror may be controlled as simply as writing a
new gray-scale image (computer generated hologram) to the device: on-demand
laser modes. We show that we can digitally control the laser modes with ease,
albeit with higher round-trip losses and thus requiring higher gain, and
demonstrate the versatility of the technique by switching between several
spatial modes in an otherwise standard solid-state laser resonator.


title: Galactic Spiral Patterns and Dynamo Action II: Asymptotic Solutions

abstract:
  The exploration of mean-field galactic dynamos affected by a galactic spiral
pattern, begun in Chamandy et al. (2013, hereafter Paper I) with numerical
simulations, is continued here with an asymptotic solution. The mean-field
dynamo model used generalizes the standard theory to include the delayed
response of the mean electromotive force to variations of the mean magnetic
field and turbulence parameters (the temporal non-locality, or {\tau} effect).
The effect of the spiral pattern on the dynamo considered is the enhancement of
the {\alpha}-effect in spiral-shaped regions (which may overlap the gaseous
spiral arms or be located in the interarm regions). The axisymmetric and
enslaved non-axisymmetric modes of the mean magnetic field are studied
semi-analytically to clarify and strengthen the numerical results. Good
qualitative agreement is obtained between the asymptotic solution and numerical
solutions of Paper I for a global, rigidly rotating material spiral (density
wave). At all galactocentric distances except for the co-rotation radius, we
find magnetic arms displaced in azimuth from the {\alpha}-arms, so that the
ridges of magnetic field strength are more tightly wound than the
{\alpha}-arms. Moreover, the effect of a finite dynamo relaxation time {\tau}
(related to the turbulence correlation time) is to phase-shift the magnetic
arms in the direction opposite to the galactic rotation even at the co-rotation
radius. This mechanism can be used to explain the phase shifts between magnetic
and material arms observed in some spiral galaxies.


title: Operational measure of incompatibility of noncommuting observables

abstract:
  Uncertainty relations are often considered to be a measure of incompatibility
of noncommuting observables. However, such a consideration is not valid in
general, motivating the need for an alternate measure that applies to any set
of noncommuting observables. We present an operational approach to quantifying
incompatibility without invoking uncertainty relations. Our measure aims to
capture the incompatibility of noncommuting observables as manifest in the
non-orthogonality of their eigenstates. We prove that this measure has all the
desired properties: it is zero when the observables commute, strictly greater
than zero when they do not, and is maximum when they are mutually unbiased. We
also obtain tight upper bounds on this measure for any N noncommuting
observables and compute it exactly when the observables are mutually unbiased.


title: Extremum Problems with Total Variation Distance and their Applications

abstract:
  The aim of this paper is to investigate extremum problems with pay-off being
the total variational distance metric defined on the space of probability
measures, subject to linear functional constraints on the space of probability
measures, and vice-versa; that is, with the roles of total variational metric
and linear functional interchanged. Utilizing concepts from signed measures,
the extremum probability measures of such problems are obtained in closed form,
by identifying the partition of the support set and the mass of these extremum
measures on the partition. The results are derived for abstract spaces;
specifically, complete separable metric spaces known as Polish spaces, while
the high level ideas are also discussed for denumerable spaces endowed with the
discrete topology. These extremum problems often arise in many areas, such as,
approximating a family of probability distributions by a given probability
distribution, maximizing or minimizing entropy subject to total variational
distance metric constraints, quantifying uncertainty of probability
distributions by total variational distance metric, stochastic minimax control,
and in many problems of information, decision theory, and minimax theory.


title: The 3-way intersection problem for S(2, 4, v) designs

abstract:
  In this paper the 3-way intersection problem for $S(2,4,v)$ designs is
investigated. Let $b_{v}=\frac {v(v-1)}{12}$ and
$I_{3}[v]=\{0,1,...,b_{v}\}\setminus\{b_{v}-7,b_{v}-6,b_{v}-5,b_{v}-4,b_{v}-3,b_{v}-2,b_{v}-1\}$.
Let $J_{3}[v]=\{k|$ there exist three $S(2,4,v)$ designs with $k$ same common
blocks$\}$. We show that $J_{3}[v]\subseteq I_{3}[v]$ for any positive integer
$v\equiv1, 4\ (\rm mod \ 12)$ and $J_{3}[v]=I_{3}[v]$, for $ v\geq49$ and $v=13
$. We find $J_{3}[16]$ completely. Also we determine some values of $J_{3}[v]$
for $\ v=25,28,37$ and 40.


title:
Capacity Analysis of Bidirectional AF Relay Selection with Imperfect
  Channel State Information

abstract:
  In this letter, we analyze the ergodic capacity of bidirectional
amplify-and-forward relay selection (RS) with imperfect channel state
information (CSI), i.e., outdated CSI and imperfect channel estimation.
Practically, the optimal RS scheme in maximizing the ergodic capacity cannot be
achieved, due to the imperfect CSI. Therefore, two suboptimal RS schemes are
discussed and analyzed, in which the first RS scheme is based on the imperfect
channel coefficients, and the second RS scheme is based on the predicted
channel coefficients. The lower bound of the ergodic capacity with imperfect
CSI is derived in a closed-form, which matches tightly with the simulation
results. The results reveal that once CSI is imperfect, the ergodic capacity of
bidirectional RS degrades greatly, whereas the RS scheme based on the predicted
channel has better performance, and it approaches infinitely to the optimal
performance, when the prediction length is sufficiently large.


title: Can SGRs/AXPs originate from neutron star binaries?

abstract:
  Soft gamma repeaters (SGRs) and anomalous X-ray pulsars (AXPs) are two groups
of enigmatic objects, which have been extensively investigated in past few
decades. Based on the ample information about their timing behaviors, spectra,
and variability properties, it was proposed that SGRs/AXPs are isolated neutron
stars (NSs) with extremely strong magnetic fields, the so-called magnetars.
Nonetheless, some alternative models are probably equally convincing such as
those proposing that they are accreting NSs with a fall-back disk or
rotation-powered magnetized and massive white dwarfs. The nature and nurture of
SGRs/AXPs remain controversial. In this paper, we propose that SGRs/AXPs can
originate from normal NSs in binary systems. SGRs are a class of objects
containing a neutron-drip core and denser crust with a stiffer equation of
state, which is formed from re-explosion of normal NSs in binary systems. It is
the accretion onto the denser crust that contributes to the observed hard
emissions. AXPs are a group of NSs which reserve huge thermal energy in an
insulating layer above the surface. This structure accretes material from a
massive disk, manifesting themselves via release of deposited energy. The
spin-period clustering is due to either the brake of a slowly rotating envelope
or the frictional drag during the common-envelope phase.


title:
A Linear Time Active Learning Algorithm for Link Classification -- Full
  Version --

abstract:
  We present very efficient active learning algorithms for link classification
in signed networks. Our algorithms are motivated by a stochastic model in which
edge labels are obtained through perturbations of a initial sign assignment
consistent with a two-clustering of the nodes. We provide a theoretical
analysis within this model, showing that we can achieve an optimal (to whithin
a constant factor) number of mistakes on any graph G = (V,E) such that |E| =
\Omega(|V|^{3/2}) by querying O(|V|^{3/2}) edge labels. More generally, we show
an algorithm that achieves optimality to within a factor of O(k) by querying at
most order of |V| + (|V|/k)^{3/2} edge labels. The running time of this
algorithm is at most of order |E| + |V|\log|V|.


title:
A characterization of orthogonal vector fields over ${\bf W^*}$-algebras
  of type ${\bf I_2}$

abstract:
  In the paper we give a characterization of a $w^*$-continuous orthogonal
vector field $F$ over an $W^*$-algebra $\mathcal{N}$ of type $I_2$ in terms of
reductions $F$ on the center of $\mathcal{N}$. As an application it is obtained
a proof of the assertion that an arbitrary $w^*$-continuous orthogonal vector
field over a $W^*$-algebra of type $I_2$ is stationary.


title:
A Correlation Clustering Approach to Link Classification in Signed
  Networks -- Full Version --

abstract:
  Motivated by social balance theory, we develop a theory of link
classification in signed networks using the correlation clustering index as
measure of label regularity. We derive learning bounds in terms of correlation
clustering within three fundamental transductive learning settings: online,
batch and active. Our main algorithmic contribution is in the active setting,
where we introduce a new family of efficient link classifiers based on covering
the input graph with small circuits. These are the first active algorithms for
link classification with mistake bounds that hold for arbitrary signed
networks.


title:
Kibble-Zurek mechanism in a trapped ferromagnetic Bose-Einstein
  condensate

abstract:
  Spontaneous spin vortex formation in the magnetic phase transition of a
trapped spin-1 Bose-Einstein condensate is investigated using mean-field
theory. In a harmonic trapping potential, an inhomogeneous atomic density leads
to spatial variations of the critical point, magnetization time scale, and spin
correlation length. The Kibble-Zurek phenomena are shown to emerge even in such
inhomogeneous systems, when the quench of the quadratic Zeeman energy is fast
enough. For slow quench, the magnetized region gradually expands from the
center of the trap pushing out spin vortices, which hinders the Kibble-Zurek
mechanism from occurring. A harmonic trap with a plug potential is also taken
into account.


title: Real zeros of 2F1 hypergeometric polynomials

abstract:
  We use a method based on the division algorithm to determine all the values
of the real parameters $b$ and $c$ for which the hypergeometric polynomials
$_2F_1(-n, b; c; z)$ have $n$ real, simple zeros. Furthermore, we use the
quasi-orthogonality of Jacobi polynomials to determine the intervals on the
real line where the zeros are located.


title: In-plane Magnetization Induced Quantum Anomalous Hall Effect

abstract:
  In a two-dimensional electron gas, the quantized Hall conductance can be
induced by a strong magnetic field, known as the quantum Hall effect, and it
can also result from the strong exchange coupling of magnetic ions, dubbed as
the "quantum anomalous Hall effect". The quantum Hall effect requires the
out-of-plane magnetic field, and similarly, it is commonly believed that the
magnetization should be out-of-plane for the quantum anomalous Hall effect. In
the present work, we find this condition is not necessary and predict that the
quantum anomalous Hall effect can also be induced by the purely in-plane
magnetization in two realistic systems, including Bi$_2$Te$_3$ thin film with
magnetic doping and HgMnTe quantum wells with shear strains, when all the
reflection symmetries are broken. An experimental setup is proposed to confirm
this effect, the observation of which will pave the way to search for the
quantum anomalous Hall effect in a wider range of materials.


title: Binary Cyclic codes with two primitive nonzeros

abstract:
  In this paper, we make some progress towards a well-known conjecture on the
minimum weights of binary cyclic codes with two primitive nonzeros. We also
determine the Walsh spectrum of $\Tr(x^d)$ over $\F_{2^{m}}$ in the case where
$m=2t$, $d=3+2^{t+1}$ and $\gcd(d, 2^{m}-1)=1$.


title:
On Adaptive Multiple-Shooting Method for Stochastic Multi-Point Boundary
  Value Problems

abstract:
  This paper presents an adaptive multiple-shooting method to solve stochastic
multi-point boundary value problems. The heuristic to choose the shooting
points is based on separating the effects of drift and diffusion terms and
comparing the corresponding solution components with a pre-specified initial
approximation. Having obtained the mesh points, we solve the underlying
stochastic differential equation on each shooting interval with a first-order
strongly-convergent stochastic Runge-Kutta method. We illustrate the
effectiveness of this approach on 1-dimentional and 2-dimentional test problems
and compare our results with other non-adaptive alternative techniques proposed
in the literature.


title: Totally disconnected groups from Baumslag-Solitar groups

abstract:
  For each Baumslag-Solitar group BS(m,n) (m,n nonzero integers), a totally
disconnected, locally compact group, G_{m,n}, is constructed so that BS(m,n) is
identified with a dense subgroup of G_{m,n}. The scale function on G_{m,n}, a
structural invariant for the topological group, is seen to distinguish the
parameters m and n to the extent that the set of scale values is
{(lcm(m,n)/|m|)^{\rho}, (lcm(m,n)/|n|)^{\rho} | \rho\in N}. It is also shown
that G_{m,n} has flat rank 1 when |m|\neq |n| and 0 otherwise, and that G_{m,n}
has a compact, open subgroup isomorphic to the product {(Z_p,+) | p is a prime
divisor of the scale}.


title: Laser cooling to quantum degeneracy

abstract:
  We report on Bose-Einstein condensation (BEC) in a gas of strontium atoms,
using laser cooling as the only cooling mechanism. The condensate is formed
within a sample that is continuously Doppler cooled to below 1\muK on a
narrow-linewidth transition. The critical phase-space density for BEC is
reached in a central region of the sample, in which atoms are rendered
transparent for laser cooling photons. The density in this region is enhanced
by an additional dipole trap potential. Thermal equilibrium between the gas in
this central region and the surrounding laser cooled part of the cloud is
established by elastic collisions. Condensates of up to 10^5 atoms can be
repeatedly formed on a timescale of 100ms, with prospects for the generation of
a continuous atom laser.


title:
Contraction of Riccati flows applied to the convergence analysis of a
  max-plus curse of dimensionality free method

abstract:
  Max-plus based methods have been recently explored for solution of
first-order Hamilton-Jacobi-Bellman equations by several authors. In
particular, McEneaney's curse-of-dimensionality free method applies to the
equations where the Hamiltonian takes the form of a (pointwise) maximum of
linear/quadratic forms.
  In previous works of McEneaney and Kluberg, the approximation error of the
method was shown to be $O(1/(N\tau))+O(\sqrt{\tau})$ where $\tau$ is the time
discretization step and $N$ is the number of iterations. Here we use a recently
established contraction result for the indefinite Riccati flow in Thompson's
metric to show that under different technical assumptions, still covering an
important class of problems, the error is only of order $O(e^{-\alpha
N\tau})+O(\tau)$. This also allows us to obtain improved estimates of the
execution time and to tune the precision of the pruning procedure, which in
practice is a critical element of the method.


title: Asymptotic Poincar\'e compactification and finite-time singularities

abstract:
  We provide an extension of the method of asymptotic decompositions of vector
fields with finite-time singularities by applying the central extension
technique of Poincar\'e to the dominant part of the vector field on approach to
the singularity. This leads to a bundle of fan-out asymptotic systems whose
equilibria at infinity govern the dynamics of the asymptotic solutions of the
original system. We show how this method can be useful to describe a
single-fluid isotropic universe at the time of maximum expansion, and discuss
possible relations of our results to structural stability and non-compact phase
spaces.


title: Formal Verification of Hardware Synthesis

abstract:
  We report on the implementation of a certified compiler for a high-level
hardware description language (HDL) called Fe-Si (FEatherweight SynthesIs).
Fe-Si is a simplified version of Bluespec, an HDL based on a notion of guarded
atomic actions. Fe-Si is defined as a dependently typed deep embedding in Coq.
The target language of the compiler corresponds to a synthesisable subset of
Verilog or VHDL. A key aspect of our approach is that input programs to the
compiler can be defined and proved correct inside Coq. Then, we use extraction
and a Verilog back-end (written in OCaml) to get a certified version of a
hardware design.


title:
From Quantitative Spatial Operator to Qualitative Spatial Relation Using
  Constructive Solid Geometry, Logic Rules and Optimized 9-IM Model, A Semantic
  Based Approach

abstract:
  The Constructive Solid Geometry (CSG) is a data model providing a set of
binary Boolean operators such as Union, Difference and Intersection. In this
work, these operators are used to compute topological relations between objects
defined by the constraints of the nine Intersection Model (9-IM) from
Egenhofer. With the help of these constraints, we define a procedure to compute
the topological relations on CSG objects. These topological relations are
Disjoint, Contains, Inside, Covers, CoveredBy, Equals and Overlaps, and are
defined in a top-level ontology with a specific semantic definition on relation
such as Transitive, Symmetric, Asymmetric, Functional, Reflexive, and
Irreflexive. The results of topological relations computation are stored in the
ontology allowing after what to infer on these topological relationships. In
addition, logic rules based on the Semantic Web Language allows the definition
of logic programs that define which topological relationships have to be
computed on which kind of objects. For instance, a "Building" that overlaps a
"Railway" is a "RailStation".


title: Ontology-based Recommender System of Economic Articles

abstract:
  Decision makers need economical information to drive their decisions. The
Company Actualis SARL is specialized in the production and distribution of a
press review about French regional economic actors. This economic review
represents for a client a prospecting tool on partners and competitors. To
reduce the overload of useless information, the company is moving towards a
customized review for each customer. Three issues appear to achieve this goal.
First, how to identify the elements in the text in order to extract objects
that match with the recommendation's criteria presented? Second, How to define
the structure of these objects, relationships and articles in order to provide
a source of knowledge usable by the extraction process to produce new knowledge
from articles? The latter issue is the feedback on customer experience to
identify the quality of distributed information in real-time and to improve the
relevance of the recommendations. This paper presents a new type of
recommendation based on the semantic description of both articles and user
profile.


title: Jet precession in the active nucleus of M81. Ongoing VLBI monitoring

abstract:
  In a recent publication, we reported results of a multi-frequency VLBI
campaign of observations of the Active Galactic Nucleus (AGN) in galaxy M\,81,
phase-referenced to the supernova SN\,1993J. We were able to extract precise
information on the relative astrometry of the AGN radio emission at different
epochs and frequencies. We found strong evidence of precession in the AGN jet
(i.e., a systematic evolution in the jet inclination at each frequency) coupled
to changes in the overall flux density at the different frequencies. In these
proceedings, we summarise the main contents of our previous publication and we
report on (preliminary) new results from our follow-up VLBI observations, now
phase-referenced to the young supernova SN2008iz. We also briefly discuss how
these results match the picture of our previously-reported precession model.


title:
From 3D Point Clouds To Semantic Objects An Ontology-Based Detection
  Approach

abstract:
  This paper presents a knowledge-based detection of objects approach using the
OWL ontology language, the Semantic Web Rule Language, and 3D processing
built-ins aiming at combining geometrical analysis of 3D point clouds and
specialist's knowledge. This combination allows the detection and the
annotation of objects contained in point clouds. The context of the study is
the detection of railway objects such as signals, technical cupboards, electric
poles, etc. Thus, the resulting enriched and populated ontology, that contains
the annotations of objects in the point clouds, is used to feed a GIS systems
or an IFC file for architecture purposes.


title:
Neutrinoless double beta decay and pseudo-Dirac neutrino mass
  predictions through inverse seesaw mechanism

abstract:
  In the inverse seesaw extension of the standard model, supersymmetric or
non-supersymmetric, while the light left-handed neutrinos are Majorana, the
heavy right-handed neutrinos are pseudo-Dirac fermions. We show how one of
these latter category of particles can contribute quite significantly to
neutrinoless double beta decay. The neutrino virtuality momentum is found to
play a crucial role in the non-standard contributions leading to the prediction
of the pseudo-Dirac fermion mass in the range of $120\, {MeV}-500\, {MeV}$.
When the Dirac neutrino mass matrix in the inverse seesaw formula is similar to
the up-quark mass matrix, characteristic of high scale quark-lepton symmetric
origin, the predicted branching ratios for lepton flavor violating decays are
also found to be closer to the accessible range of ongoing experiments.


title: Conformal Theories with an IR cutoff

abstract:
  We give a new perspective on the dynamics of conformal theories realized in
the SU(N) gauge theory, when the number of flavors N_f is within the conformal
window. Motivated by the RG argument on conformal theories with a finite IR
cutoff \Lambda_{IR}, we conjecture that the propagator of a meson G_H(t) on a
lattice behaves at large t as a power-law corrected Yukawa-type decaying form
G_H(t) = c_H \exp{(-m_H t)}/t^{\alpha_H} instead of the exponentially decaying
form c_H\exp{(-m_H t)}, in the small quark mass region where m_H \le c
\Lambda_{IR}: m_H is the mass of the ground state hadron in the channel H and c
is a constant of order 1. The transition between the "conformal region" and the
"confining region" is a first order transition. Our numerical results verify
the predictions for the N_f=7 case and the N_f=16 case in the SU(3) gauge
theory with the fundamental representation.


title:
Energy Cooperation in Cellular Networks with Renewable Powered Base
  Stations

abstract:
  In this paper, we propose a model for energy cooperation between cellular
base stations (BSs) with individual hybrid power supplies (including both the
conventional grid and renewable energy sources), limited energy storages, and
connected by resistive power lines for energy sharing. When the renewable
energy profile and energy demand profile at all BSs are deterministic or known
ahead of time, we show that the optimal energy cooperation policy for the BSs
can be found by solving a linear program. We show the benefits of energy
cooperation in this regime. When the renewable energy and demand profiles are
stochastic and only causally known at the BSs, we propose an online energy
cooperation algorithm and show the optimality properties of this algorithm
under certain conditions. Furthermore, the energy-saving performances of the
developed offline and online algorithms are compared by simulations, and the
effect of the availability of energy state information (ESI) on the performance
gains of the BSs' energy cooperation is investigated. Finally, we propose a
hybrid algorithm that can incorporate offline information about the energy
profiles, but operates in an online manner.


title: Quantum Noise in Conventional Optical Heterodyne Devices

abstract:
  By invoking the quantum theory of optical coherence, we theoretically show
that the quantum noise in conventional optical heterodyne devices, which were
previously identified as usual phase-insensitive amplifiers with additional
quantum noise, is similar to that in optical homodyne devices, as verified by
experimental data. Albeit more study is demanded to understand this result, it
is certain that neither the uncertainty principle nor Caves's theorem for
quantum noise of linear amplifiers sets a limit to the quantum noise of
heterodyne devices.


title:
Stochastic Averaging Principle for Dynamical Systems with Fractional
  Brownian Motion

abstract:
  Stochastic averaging for a class of stochastic differential equations (SDEs)
with fractional Brownian motion, of the Hurst parameter H in the interval (1/2,
1), is investigated. An averaged SDE for the original SDE is proposed, and
their solutions are quantitatively compared. It is shown that the solution of
the averaged SDE converges to that of the original SDE in the sense of mean
square and also in probability. It is further demonstrated that a similar
averaging principle holds for SDEs under stochastic integral of pathwise
backward and forward types. Two examples are presented and numerical
simulations are carried out to illustrate the averaging principle.


title: On the Saturation of the Nonlinear Refractive Index in Atomic Gases

abstract:
  Motivated by the ongoing controversy on the origin of the nonlinear index
saturation and subsequent intensity clamping in femtosecond filaments, we study
the atomic nonlinear polarization induced by a high-intensity and ultrashort
laser pulse in hydrogen by numerically solving the time dependent Schr\"odinger
equation. Special emphasis is given to the efficient modeling of the nonlinear
polarization at central laser frequency corresponding to 800 nm wavelength.
Here, the recently proposed model of the Higher-Order Kerr Effect (HOKE) and
two versions of the Standard model for femtosecond filamentation, including
either a multi-photon or tunnel ionization rate, are compared. We find that
around the clamping intensity the instantaneous HOKE model does not reproduce
the temporal structure of the nonlinear response obtained from the quantum
mechanical results. In contrast, the non-instantaneous charge contributions
included in the Standard models ensure a reasonable quantitative agreement.
Therefore, the physical origin for the observed saturation of the overall
electron response is confirmed to mainly result from contributions of free or
nearly free electrons.


title: On the Biclique cover of the complete graph

abstract:
  Let $K$ be a set of $k$ positive integers. A biclique cover of type $K$ of a
graph $G$ is a collection of complete bipartite subgraphs of $G$ such that for
every edge $e$ of $G$, the number of bicliques need to cover $e$ is a member of
$K$. If $K=\{1,2,..., k\}$ then the maximum number of the vertices of a
complete graph that admits a biclique cover of type $K$ with $d$ bicliques,
$n(k,d)$, is the maximum possible cardinality of a $k$-neighborly family of
standard boxes in $\mathbb{R}^d$.
  In this paper, we obtain an upper bound for $n(k,d)$. Also, we show that the
upper bound can be improved in some special cases. Moreover, we show that the
existence of the biclique cover of type $K$ of the complete bipartite graph
with a perfect matching removed is equivalent to the existence of a cross
$K$-intersection family.


title:
Possible indication for non-zero neutrino mass and additional neutrino
  species from cosmological observations

abstract:
  The constraints on total neutrino mass and effective number of neutrino
species based on CMB anisotropy power spectrum, Hubble constant, baryon
acoustic oscillations and galaxy cluster mass function data are presented. It
is shown that the discrepancies between various cosmological data in Hubble
constant and density fluctuation amplitude, measured in standard LCDM
cosmological model, can be eliminated if more than standard effective number of
neutrino species and non-zero total neutrino mass are considered. This
extension of LCDM model appears to be \approx 3 \sigma\ significant when all
cosmological data are used. The model with approximately one additional
neutrino type, N_eff \approx 4, and with non-zero total neutrino mass, \approx
0.5 eV, provide the best fit to the data. In the model with only one massive
neutrino the upper limits on neutrino mass are slightly relaxed. It is shown
that these deviations from LCDM model appear mainly due to the usage of recent
data on the observations of baryon acoustic oscillations. Larger than standard
number of neutrino species is measured mainly due to the comparison of the BAO
data with direct measurements of Hubble constant, which was already noticed
earlier. As it is shown below, the data on galaxy cluster mass function in this
case give the measurement of non-zero neutrino mass.


title:
System of nonlinear oscillators with dissipation. Initial interval of
  autoresonance

abstract:
  We investigate an influence of dissipation on autoresonant threshold for a
system of nonlinear oscillators. Exact asymptotic formulas and numerical
simulations are presented. These results correspond to an initial interval of
autoresonance.


title:
LMMSE Estimation and Interpolation of Continuous-Time Signals from
  Discrete-Time Samples Using Factor Graphs

abstract:
  The factor graph approach to discrete-time linear Gaussian state space models
is well developed. The paper extends this approach to continuous-time linear
systems/filters that are driven by white Gaussian noise. By Gaussian message
passing, we then obtain MAP/MMSE/LMMSE estimates of the input signal, or of the
state, or of the output signal from noisy observations of the output signal.
These estimates may be obtained with arbitrary temporal resolution. The
proposed input signal estimation does not seem to have appeared in the prior
Kalman filtering literature.


title:
Weak and quasi-polynomial tractability of approximation of infinitely
  differentiable functions

abstract:
  We comment on recent results in the field of information based complexity,
which state (in a number of different settings), that approximation of
infinitely differentiable functions is intractable and suffers from the curse
of dimensionality. We show that renorming the space of infinitely
differentiable functions in a suitable way allows weakly tractable uniform
approximation by using only function values. Moreover, the approximating
algorithm is based on a simple application of Taylor's expansion at the center
of the unit cube. We discuss also the approximation on the Euclidean ball and
the approximation in the $L_1$-norm, which is closely related to the problem of
numerical integration.


title:
Model Selection Approach for Distributed Fault Detection in Wireless
  Sensor Networks

abstract:
  Sensor networks aim at monitoring their surroundings for event detection and
object tracking. But, due to failure, or death of sensors, false signal can be
transmitted. In this paper, we consider the problems of distributed fault
detection in wireless sensor network (WSN). In particular, we consider how to
take decision regarding fault detection in a noisy environment as a result of
false detection or false response of event by some sensors, where the sensors
are placed at the center of regular hexagons and the event can occur at only
one hexagon. We propose fault detection schemes that explicitly introduce the
error probabilities into the optimal event detection process. We introduce two
types of detection probabilities, one for the center node, where the event
occurs and the other one for the adjacent nodes. This second type of detection
probability is new in sensor network literature. We develop schemes under the
model selection procedure, multiple model selection procedure and use the
concept of Bayesian model averaging to identify a set of likely fault sensors
and obtain an average predictive error.


title: Strategy for implementing stabilizer-based codes on solid-state qubits

abstract:
  We present a method for implementing stabilizer-based codes with encoding
schemes of the operator quantum error correction paradigm, e.g., the "standard"
five-qubit and CSS codes, on solid-state qubits with Ising or XY-type
interactions. Using pulse sequences, we show how to induce the effective
dynamics of the stabilizer Hamiltonian, the sum of an appropriate set of
stabilizer operators for a given code. Within this approach, the encoded states
(ground states of the stabilizer Hamiltonian) can be prepared without
measurements and preserved against both the time evolution governed by the
original qubit Hamiltonian, and energy-nonconserving errors caused by the
environment.


title: A principal components method to impute missing values for mixed data

abstract:
  We propose a new method to impute missing values in mixed datasets. It is
based on a principal components method, the factorial analysis for mixed data,
which balances the influence of all the variables that are continuous and
categorical in the construction of the dimensions of variability. Because the
imputation uses the principal axes and components, the prediction of the
missing values are based on the similarity between individuals and on the
relationships between variables. The quality of the imputation is assessed
through a simulation study and real datasets. The method is compared to a
recent method (Stekhoven and B\"uhlmann, 2011) based on random forests and
shows better performances especially for the imputation of categorical
variables and when there are highly linear relationships between continuous
variables.


title:
A Novel Mode Switching Scheme Utilizing Random Beamforming for
  Opportunistic Energy Harvesting

abstract:
  Since radio signals carry both energy and information at the same time, a
unified study on simultaneous wireless information and power transfer (SWIPT)
has recently drawn a significant attention for achieving wireless powered
communication networks. In this paper, we study a multiple-input single-output
(MISO) multicast SWIPT network with one multi-antenna transmitter sending
common information to multiple single-antenna receivers simultaneously along
with opportunistic wireless energy harvesting at each receiver. From the
practical consideration, we assume that the channel state information (CSI) is
only known at each respective receiver but is unavailable at the transmitter.
We propose a novel receiver mode switching scheme for SWIPT based on a new
application of the conventional random beamforming technique at the
multi-antenna transmitter, which generates artificial channel fading to enable
more efficient energy harvesting at each receiver when the received power
exceeds a certain threshold. For the proposed scheme, we investigate the
achievable information rate, harvested average power and/or power outage
probability, as well as their various trade-offs in both AWGN and quasi-static
fading channels. Compared to a reference scheme of periodic receiver mode
switching without random transmit beamforming, the proposed scheme is shown to
be able to achieve better rate-energy trade-offs when the harvested energy
target is sufficiently large. Particularly, it is revealed that employing one
single random beam for the proposed scheme is asymptotically optimal as the
transmit power increases to infinity, and also performs the best with finite
transmit power for the high harvested energy regime of most practical
interests, thus leading to an appealing low-complexity implementation. Finally,
we compare the rate-energy performances of the proposed scheme with different
random beam designs.


title: Odd Jacobi manifolds and Loday-Poisson brackets

abstract:
  In this paper we construct a non-skewsymmetric version of a Poisson bracket
on the algebra of smooth functions on an odd Jacobi supermanifold. We refer to
such Poisson-like brackets as Loday-Poisson brackets. We examine the relations
between the Hamiltonian vector fields with respect to both the odd Jacobi
structure and the Loday-Poisson structure. Furthermore, we show that the
Loday-Poisson bracket satisfies the Leibniz rule over the noncommutative
product derived from the homological vector field.


title:
Schedulability Analysis of Distributed Real-Time Applications under
  Dependence and Several Latency Constraints

abstract:
  This paper focuses on the analysis of real-time non preemptive multiprocessor
scheduling with precedence and several latency constraints. It aims to specify
a schedulability condition which enables a designer to check a priori -without
executing or simulating- if its scheduling of tasks will hold the precedences
between tasks as well as several latency constraints imposed on determined
pairs of tasks. It is shown that the required analysis is closely linked to the
topological structure of the application graph. More precisely, it depends on
the configuration of tasks paths subject to latency constraints. As a result of
the study, a sufficient schedulability condition is introduced for precedences
and latency constraints in the hardest configuration in term of complexity with
an optimal number of processors in term of applications parallelism. In
addition, the proposed conditions provides a practical lower bounds for general
cases. Performances results and comparisons with an optimal approach
demonstrate the effectiveness of the proposed approach.


title:
Dynamics of the One-Dimensional Ising Model without Detailed Balance
  Condition

abstract:
  We study an irreversible Markov chain Monte Carlo method based on a skew
detailed balance condition for an one-dimensional Ising model. Dynamical
behavior of the magnetization density is analyzed in order to understand the
properties of this method. As a result, it is found theoretically that the
relaxation time of the magnetization density is reduced by using some
transition probabilities satisfying the skew detailed balance condition, in
comparison to that with the corresponding transition probability with the
detailed balance condition, and that one of the transition probabilities
changes the dynamical critical exponent even with a local spin update.


title:
Grand-canonical-like molecular-dynamics simulations by using an
  adaptive-resolution technique

abstract:
  In this work, we provide a detailed theoretical analysis, supported by
numerical tests, of the reliability of the adaptive resolution simulation
(AdResS) technique in sampling the Grand Canonical ensemble. We demonstrate
that the correct density and radial distribution functions in the hybrid
region, where molecules change resolution, are two necessary conditions for
considering the atomistic and coarse-grained regions in AdResS equivalent to
subsystems of a full atomistic system with an accuracy up to the second order
with respect to the probability distribution of the system. Moreover, we show
that the work done by the thermostat and a thermodynamic force in the
transition region is formally equivalent to balance the chemical potential
difference between the different resolutions. From these results follows the
main conclusion that the atomistic region exchanges molecules with the
coarse-grained region in a Grand Canonical fashion with an accuracy up to (at
least) second order. Numerical tests, for the relevant case of liquid water at
ambient conditions, are carried out to strengthen the conclusions of the
theoretical analysis. Finally, in order to show the computational convenience
of AdResS as a Grand Canonical set up, we compare our method to the Insertion
Particle Method (IMP) in its most efficient computational implementation. This
fruitful combination of theoretical principles and numerical evidence
candidates the adaptive resolution technique as a natural, general and
efficient protocol for Grand Canonical Molecular Dynamics for the case of large
systems.


title:
Statistics on parallelogram polyominoes and a q,t-analogue of the
  Narayana numbers

abstract:
  We study the statistics area, bounce and dinv on the set of parallelogram
polyominoes having a rectangular m times n bounding box. We show that the
bi-statistics (area, bounce) and (area, dinv) give rise to the same
q,t-analogue of Narayana numbers which was introduced by two of the authors in
[arXiv:1208.0024]. We prove the main conjectures of that paper: the
q,t-Narayana polynomials are symmetric in both q and t, and m and n. This is
accomplished by providing a symmetric functions interpretation of the
q,t-Narayana polynomials which relates them to the famous diagonal harmonics.


title: Fractional absolute moments of heavy tailed distributions

abstract:
  Several convenient methods for calculation of fractional absolute moments are
given with application to heavy tailed distributions. We use techniques of
fractional differentiation to obtain formulae for $E[|X-\mu|^\gamma]$ with
$1<\gamma<2$ and $\mu\in\mathbb{R}$. The main focus is on heavy tailed
distributions, several examples are given with analytical expressions of
fractional absolute moments. As applications, we calculate the fractional
moment errors for both prediction and parameter estimation problems.


title:
Canonical Functions and Differential Graded Symplectic Pairs in
  Supergeometry and AKSZ Sigma Models with Boundary

abstract:
  Consistent boundary conditions for Alexandrov-Kontsevich-Schwartz-Zaboronsky
(AKSZ) sigma models and the corresponding boundary theories are analyzed. As
their mathematical structures, we introduce a generalization of differential
graded symplectic manifolds, called twisted QP manifolds, in terms of graded
symplectic geometry, canonical functions, and QP pairs. We generalize the AKSZ
construction of topological sigma models to sigma models with Wess-Zumino terms
and show that all the twisted Poisson-like structures known in the literature
can actually be naturally realized as boundary conditions for AKSZ sigma
models.


title:
Spectral Properties of the Dirichlet Operator $\sum_{i=1}^d
  (-\partial_i^2)^s$ on Domains in d-Dimensional Euclidean Space

abstract:
  In this article we investigate the distribution of eigenvalues of the
Dirichlet pseudo-differential operator $\sum_{i=1}^{d}(-\partial_i^2)^{s}, \,
s\in (1/2,1]$ on an open and bounded subdomain $\Omega \subset \mathbb{R}^d$
and predict bounds on the sum of the first $N$ eigenvalues, the counting
function, the Riesz means and the trace of the heat kernel. Moreover, utilizing
the connection of coherent states to the semi-classical approach of Quantum
Mechanics we determine the sum for moments of eigenvalues of the associated
Schr\"{o}dinger operator.


title:
Comparison and anti-concentration bounds for maxima of Gaussian random
  vectors

abstract:
  Slepian and Sudakov-Fernique type inequalities, which compare expectations of
maxima of Gaussian random vectors under certain restrictions on the covariance
matrices, play an important role in probability theory, especially in empirical
process and extreme value theories. Here we give explicit comparisons of
expectations of smooth functions and distribution functions of maxima of
Gaussian random vectors without any restriction on the covariance matrices. We
also establish an anti-concentration inequality for the maximum of a Gaussian
random vector, which derives a useful upper bound on the L\'{e}vy concentration
function for the Gaussian maximum. The bound is dimension-free and applies to
vectors with arbitrary covariance matrices. This anti-concentration inequality
plays a crucial role in establishing bounds on the Kolmogorov distance between
maxima of Gaussian random vectors. These results have immediate applications in
mathematical statistics. As an example of application, we establish a
conditional multiplier central limit theorem for maxima of sums of independent
random vectors where the dimension of the vectors is possibly much larger than
the sample size.


title: Laser scribing on HOPG for graphene stamp printing on silicon wafer

abstract:
  Highly oriented pyrolytic graphite (HOPG) was scribed by pulsed laser beam to
produce square patterns. Patterning of HOPG surface facilitates the detachment
of graphene layers during contact printing. Direct HOPG-to-substrate and
glue-assisted stamp printing of a few-layers graphene was compared. Printed
graphene sheets were visualized by optical and scanning electron microscopy.
The number of graphene layers was measured by atomic force microscopy.
Glue-assisted stamp printing allows printing relatively large graphene sheets
(40x40 microns) onto a silicon wafer, which can be important for
microelectronics fabrication. The presented method is easier to implement and
is more flexible than the majority of existing ways of placing graphene sheets
onto a substrate.


title: A Rank-based Convex Hull method for Dense Data Sets

abstract:
  A novel 2-D method for computing the convex hull of a sufficiently dense set
of n integer points is introduced. The approach employs a ranking function that
avoids sorting the points directly thus reducing the overall time complexity.
The ranked points create a simple polygonal chain from which the Convex Hull
can be found using a suitable O(n) method. The result is achieved by placing a
bound on the density (or ratio) of points to m, where m is the maximum value of
the ranking function required to represent the set of points yielding an O(n+m)
method. A fast method is then developed based on the bit length, p, of the data
set which reduces this time further. The required conditions are easily
satisfied by image processing methods which determine the Hulls of polygonal
regions where the densities are in the range of 3%. Our experiments on a range
problem domains show that this is not atypical. Since the complexity of the
method is related to the bit size p for current machines (p=32, p=64) the
method is for all practical purposes O(n). A short proof is provided.


title: A note on local gradient estimate on Alexandrov spaces

abstract:
  In this note, we prove Cheng-Yau type local gradient estimate for harmonic
functions on Alexandrov spaces with Ricci curvature bounded below. We adopt a
refined version of Moser's iteration which is based on Zhang-Zhu's Bochner type
formula. Our result improves the previous one of Zhang-Zhu in the case of
negative Ricci lower bound.


title: Future prospects at LHCb

abstract:
  The LHCb experiment is running at the Large Hadron Collider to study CP
violation and rare decays in the beauty and charm sectors. The motivation and
the strategy of the upgrade envisaged for the long shutdown LS2 (2018) is
presented. The current results for some exemplary physics analyses are given
and the expected performances foreseen for 2018 and for the LHCb Upgrade
project with an integrated luminosity of 50 fb$^{-1}$ are summarized.


title:
Carbon nanotubes with atomic impurities on boron nitride sheets under
  applied electric fields

abstract:
  We perform first-principles calculations to investigate the structural and
electronic properties of metal-doped (10, 0) carbon nanotubes (CNTs) on a
single hexagonal boron nitride (hBN) sheet in the presence of an external
electric field. We consider K, Cl and Ni atoms as dopants to study the
dependence of the electronic properties of the CNT on doping polarity and
concentration. The electric field strength is varied from -0.2 V/\AA to +0.2
V/\AA to explore the effects of an external electric field on the electronic
structures. Although the electronic energy bands of the hBN sheet are modified
in accordance with the field strength, its electronic state in the valence or
conduction band does not touch the Fermi level under the field strength
considered. We conclude that the hBN as a substrate does not modify the
electronic structure of the CNT, thereby leading to improvements in the device
performance, compared with that of devices based on conventional substrate
materials such as SiO$_2$.


title:
Probing the nature of compact ultra-steep spectrum radio sources with
  the e-EVN and e-MERLIN

abstract:
  We present first results from electronic Multi-Element Remotely Linked
Interferometer Network (e-MERLIN) and electronic European VLBI Network (e-EVN)
observations of a small sample of ultra-steep spectrum radio sources, defined
as those sources with a spectral index alpha < -1.4 between 74 MHz and 325 MHz,
which are unresolved on arcsecond scales. Such sources are currently poorly
understood and a number of theories as to their origin have been proposed in
the literature. The new observations described here have resulted in the first
detection of two of these sources at milliarcsecond scales and show that a
significant fraction of ultra-steep spectrum sources may have compact
structures which can only be studied at the high resolution available with very
long baseline interferometry (VLBI).


title: Algebraic cycles and the triangulated category of mixed motives

abstract:
  In this paper, we shall give a candidate for the t-structure on the
triangulated category of mixed motives due to Voevodsky.


title: Probing Fractionalized Charges

abstract:
  Inspired by holographic entanglement entropy, for geometries with non-zero
abelian charges, we define a quantity which is sensitive to the background
charges. One observes that there is a critical charge below that the system is
mainly described by the metric and the effects of the background charges are
just via metric's components. While for charges above the critical one the
background gauge field plays an essential role. This, in turn, might be used to
define an order parameter to probe phases of a system with fractionalized
charges.


title: The Hidden Structural Rules of the Discontinuous Lambek Calculus

abstract:
  The sequent calculus sL for the Lambek calculus L (lambek 58) has no
structural rules. Interestingly, sL is equivalent to a multimodal calculus mL,
which consists of the nonassociative Lambek calculus with the structural rule
of associativity. This paper proves that the sequent calculus or hypersequent
calculus hD of the discontinuous Lambek calculus (Morrill and Valent\'in),
which like sL has no structural rules, is also equivalent to an omega-sorted
multimodal calculus mD. More concretely, we present a faithful embedding
translation between mD and hD in such a way that it can be said that hD absorbs
the structural rules of mD.


title:
First operation and performance of a 200 lt double phase LAr LEM-TPC
  with a 40x76 cm^2 readout

abstract:
  In this paper we describe the design, construction, and operation of a first
large area double-phase liquid argon Large Electron Multiplier Time Projection
Chamber (LAr LEM-TPC). The detector has a maximum drift length of 60 cm and the
readout consists of a $40\times 76$ cm$^2$ LEM and 2D projective anode to
multiply and collect drifting charges. Scintillation light is detected by means
of cryogenic PMTs positioned below the cathode. To record both charge and light
signals, we have developed a compact acquisition system, which is scalable up
to ton-scale detectors with thousands of charge readout channels. The
acquisition system, as well as the design and the performance of custom-made
charge sensitive preamplifiers, are described. The complete experimental setup
has been operated for a first time during a period of four weeks at CERN in the
cryostat of the ArDM experiment, which was equipped with liquid and gas argon
purification systems. The detector, exposed to cosmic rays, recorded events
with a single-channel signal-to-noise ratio in excess of 30 for minimum
ionising particles. Cosmic muon tracks and their $\delta$-rays were used to
assess the performance of the detector, and to estimate the liquid argon purity
and the gain at different amplification fields.


title:
Importance of both spin and orbital fluctuations in BaFe2(As1-xPx)2 :
  Evidence from superconducting gap anisotropy

abstract:
  In the iron pnictide superconductors, two distinct unconventional mechanisms
of superconductivity have been put forth: One is mediated by spin fluctuations
leading to the s+- state with sign change of superconducting gap between the
hole and electron bands, and the other is orbital fluctuations which favor the
s++ state without sign reversal. Here we report direct observation of peculiar
momentum-dependent anisotropy in the superconducting gap from angle-resolved
photoemission spectroscopy (ARPES) in BaFe2(As1-xPx)2 (Tc=30 K). The large
anisotropy found only in the electron Fermi surface (FS) and the nearly
isotropic gap on the entire hole FSs are together consistent with modified s+-
gap with nodal loops, which can be theoretically reproduced by considering both
spin and orbital fluctuations whose competition generates the gap modulation.
This indicates that these two fluctuations are nearly equally important to the
high-Tc superconductivity in this system.


title:
Smoothing properties of the discrete fractional maximal operator on
  Besov and Triebel--Lizorkin spaces

abstract:
  Motivated by the results of Korry and Kinnunen and Saksman, we study the
behaviour of the discrete fractional maximal operator on fractional Hajlasz
spaces, Hajlasz-Besov and Hajlasz-Triebel-Lizorkin spaces on metric measure
spaces. We show that the discrete fractional maximal operator maps these spaces
to the spaces of the same type with higher smoothness. Our results extend and
unify aforementioned results. We present our results in general setting, but
they are new already in the Euclidean case.


title: Resolving the masers in M82

abstract:
  Despite first being detected in the 1970s, surprisingly little is known about
the OH main line maser population in the nearby starburst galaxy M82. Sometimes
referred to as 'kilomasers', they have isotropic luminosities intermediate
between Galactic masers and those found in more distant megamasers. Several
observations have been carried by this group over the last ten years in an
attempt to get a better handle on their nature. High velocity resolution VLA
observations in 2006 showed that almost all of the maser spots, distributed
across the central arcminute of the galaxy, were apparently coincident with
background continuum features, and a handful displayed multiple velocity
components. The majority of those with velocity structure are located on a
blue-shifted arc in the pv-plane, spatially located on an arc northward of the
peculiar source known as B41.95+57.5. Now, new results from high spatial and
spectral resolution observations with the EVN have resolved several of these
masers into multiple spatial components for the first time. The maser emission
is compared with known continuum sources in the galaxy, and we conclude that at
least some of the maser emission is from high-gain maser action.


title:
Water in star forming regions with Herschel (WISH) III. Far-infrared
  cooling lines in low-mass young stellar objects

abstract:
  (Abridged) Far-infrared Herschel-PACS spectra of 18 low-mass protostars of
various luminosities and evolutionary stages are studied. We quantify their
far-infrared line emission and the contribution of different atomic and
molecular species to the gas cooling budget during protostellar evolution. We
also determine the spatial extent of the emission and investigate the
underlying excitation conditions. Most of the protostars in our sample show
strong atomic and molecular far-infrared emission. Water is detected in 17
objects, including 5 Class I sources. The high-excitation H2O line at 63.3
micron is detected in 7 sources. CO transitions from J=14-13 up to 49-48 are
found and show two distinct temperature components on Boltzmann diagrams with
rotational temperatures of ~350 K and ~700 K. H2O has typical excitation
temperatures of ~150 K. Emission from both Class 0 and I sources is usually
spatially extended along the outflow direction but with a pattern depending on
the species and the transition. The H2O line fluxes correlate strongly with
those of the high-J CO lines, as well as with the bolometric luminosity and
envelope mass. They correlate less strongly with OH and not with [OI] fluxes.
The PACS data probe at least two physical components. The H2O and CO emission
likely arises in non-dissociative (irradiated) shocks along the outflow walls
with a range of pre-shock densities. Some OH is also associated with this
component, likely resulting from H2O photodissociation. UV-heated gas
contributes only a minor fraction to the CO emission observed by PACS, based on
the strong correlation between the shock-dominated CO 24-23 line and the CO
14-13 line. [OI] and some of the OH emission probe dissociative shocks in the
inner envelope. The total far-infrared cooling is dominated by H2O and CO, with
[OI] increasing for Class I sources.


title:
The origin of the dead-layer at the La0.67Sr0.33MnO3/SrTiO3 interface
  and dead-layer reduction via interfacial engineering

abstract:
  Transition metal oxide hetero-structure has great potential for
multifunctional devices. However, the degraded physical properties at
interface, known as dead-layer behavior, present a main obstacle for device
applications. Here we present the systematic study of the dead-layer behavior
in La0.67Sr0.33MnO3 thin film grown on SrTiO3 substrate with ozone assisted
molecular beam epitaxy. We found that the evolution of electric and magnetic
properties as a function of thickness shows a remarkable resemblance to the
phase diagram as a function of doping for bulk materials, providing compelling
evidences of the hole depletion in near interface layers that causes
dead-layer. Detailed electronic and surface structure studies indicate that the
hole depletion is due to the intrinsic oxygen vacancy formation. Furthermore,
we show that oxygen vacancies are partly caused by interfacial electric dipolar
field, and thus by doping-engineering at the single-atomic-layer level, we
demonstrate the dead-layer reduction in films with higher interfacial hole
concentration.


title: A note on the geometric interpretation of Bell's inequalities

abstract:
  Using results of Pitowsky and Gupta, we show in a direct, elementary fashion
that, in the case of three spins, Bell's inequalities indeed provide a
representation of the tetrahedron of all spin correlation matrices as
intersection of half-spaces.


title: The Weight Enumerator of Three Families of Cyclic Codes

abstract:
  Cyclic codes are a subclass of linear codes and have wide applications in
consumer electronics, data storage systems, and communication systems due to
their efficient encoding and decoding algorithms. Cyclic codes with many zeros
and their dual codes have been a subject of study for many years. However,
their weight distributions are known only for a very small number of cases. In
general the calculation of the weight distribution of cyclic codes is heavily
based on the evaluation of some exponential sums over finite fields. Very
recently, Li, Hu, Feng and Ge studied a class of $p$-ary cyclic codes of length
$p^{2m}-1$, where $p$ is a prime and $m$ is odd. They determined the weight
distribution of this class of cyclic codes by establishing a connection between
the involved exponential sums with the spectrum of Hermitian forms graphs. In
this paper, this class of $p$-ary cyclic codes is generalized and the weight
distribution of the generalized cyclic codes is settled for both even $m$ and
odd $m$ alone with the idea of Li, Hu, Feng, and Ge. The weight distributions
of two related families of cyclic codes are also determined.


title:
Midinfrared Third Harmonic Generation from Macroscopically Aligned
  Ultralong Single-Wall Carbon Nanotubes

abstract:
  We report the observation of strong third harmonic generation from a
macroscopic array of aligned ultralong single-wall carbon nanotubes (SWCNTs)
with intense midinfrared radiation. Through power-dependent experiments, we
determined the absolute value of the third-order nonlinear optical
susceptibility, $\chi^{(3)}$, of our SWCNT film to be 5.53 $\times$ 10$^{-12}$
esu, three orders of magnitude larger than that of the fused silica reference
we used. Taking account of the filling factor of 8.75% for our SWCNT film, we
estimate a $\chi^{(3)}$ of 6.32 $\times$ 10$^{-11}$ esu for a fully dense film.
Furthermore, through polarization-dependent experiments, we extracted all the
nonzero elements of the $\chi^{(3)}$ tensor, determining the magnitude of the
weaker tensor elements to be $\sim$1/6 of that of the dominant
$\chi^{(3)}_{zzzz}$ component.


title:
Irregular time series in astronomy and the use of the Lomb-Scargle
  periodogram

abstract:
  Detection of a signal hidden by noise within a time series is an important
problem in many astronomical searches, i.e. for light curves containing the
contributions of periodic/semi-periodic components due to rotating objects and
all other astrophysical time-dependent phenomena. One of the most popular tools
for use in such studies is the "periodogram", whose use in an astronomical
context is often not trivial. The "optimal" statistical properties of the
periodogram are lost in the case of irregular sampling of signals, which is a
common situation in astronomical experiments. Parts of these properties are
recovered by the "Lomb-Scargle" (LS) technique, but at the price of theoretical
difficulties, that can make its use unclear, and of algorithms that require the
development of dedicated software if a fast implementation is necessary. Such
problems would be irrelevant if the LS periodogram could be used to
significantly improve the results obtained by approximated but simpler
techniques. In this work we show that in many astronomical applications simpler
techniques provide results similar to those obtainable with the LS periodogram.
The meaning of the "Nyquist frequency" is also discussed in the case of
irregular sampling.


title: Spectral convergence bounds for classical and quantum Markov processes

abstract:
  We introduce a new framework that yields spectral bounds on norms of
functions of transition maps for finite, homogeneous Markov chains. The
techniques employed work for bounded semigroups, in particular for classical as
well as for quantum Markov chains and they do not require additional
assumptions like detailed balance, irreducibility or aperiodicity. We use the
method in order to derive convergence bounds that improve significantly upon
known spectral bounds. The core technical observation is that power-boundedness
of transition maps of Markov chains enables a Wiener algebra functional
calculus in order to upper bound any norm of any holomorphic function of the
transition map. Finally, we discuss how general detailed balance conditions for
quantum Markov processes lead to spectral convergence bounds.


title:
Variable resistor made by repeated steps of epitaxial deposition and
  lithographic structuring of oxide layers by using wet chemical etchants

abstract:
  Variable resistors were constructed from epitaxial SrRuO3 (SRO),
La0.67Sr0.33MnO3 (LSMO) and SrTiO3 layers with perovskite crystal structure.
Each layer was patterned separately by lithographic methods. Optimized wet
chemical etchants and several polishing steps in organic solvents allowed good
epitaxy of subsequent layers, comparable to epitaxy on pristine substrates.
Periodate as the oxidizing agent for SRO and iodide with ascorbic acid as the
reducing agents for LSMO were used to attack these chemically resistant oxides.
The final devices changed their conductance in a similar manner to previously
described variable resistors that were defined with shadow masks.


title: Extremely long hard bursts observed by Konus-Wind

abstract:
  We report the observations of the prompt emission of the extremely long hard
burst, GRB 060814B, discovered by Konus-Wind and localized by the IPN. The
observations reveal a smooth, hard, ~40-min long pulse followed by weaker
emission seen several hours after the burst onset. We also present the
Konus-Wind data on similar burst, GRB 971208, localized by BATSE/IPN. And
finally we discuss the different possible origins of these unusual events.


title: Multiplication and composition operators between two Orlicz spaces

abstract:
  In this paper we consider composition operator $C_{\varphi} generated by
nonsingular measurable transformation $T$ and multiplication operator $M_u$
generated by measurable function $u$ between two different Orlicz spaces, then
we investigate boundedness, compactness and essential norm of multiplication
and composition operators in term of properties of the mapping $\varphi$, the
function $u$ and the measure space $(X, \Sigma, \mu)$.


title: Matter bispectrum in cubic Galileon cosmologies

abstract:
  In this paper we obtain the bispectrum of dark matter density perturbations
in the frame of covariant cubic Galileon theories. This result is obtained by
means of a semi-analytic approach to second-order perturbations in Galileon
cosmologies, assuming Gaussian initial conditions. In particular, we show that,
even in the presence of large deviations of the linear growth-rate w.r.t. the
{\Lambda}CDM one, at the bispectrum level such deviations are reduced to a few
percent.


title: Measuring Model Risk

abstract:
  We propose to interpret distribution model risk as sensitivity of expected
loss to changes in the risk factor distribution, and to measure the
distribution model risk of a portfolio by the maximum expected loss over a set
of plausible distributions defined in terms of some divergence from an
estimated distribution. The divergence may be relative entropy, a Bregman
distance, or an $f$-divergence. We give formulas for the calculation of
distribution model risk and explicitly determine the worst case distribution
from the set of plausible distributions. We also give formulas for the
evaluation of divergence preferences describing ambiguity averse decision
makers.


title: Calibration of the Mid-Infrared Tully-Fisher Relation

abstract:
  Distance measures on a coherent scale around the sky are required to address
the outstanding cosmological problems of the Hubble Constant and of departures
from the mean cosmic flow. The correlation between galaxy luminosities and
rotation rates can be used to determine distances to many thousands of galaxies
in a wide range of environments potentially out to 200 Mpc. Mid-infrared (3.6
microns) photometry with the Spitzer Space Telescope is particularly valuable
as the source of the luminosities because it provides products of uniform
quality across the sky. From a perch above the atmosphere, essentially the
total magnitude of targets can be registered in exposures of a few minutes.
Extinction is minimal and the flux is dominated by the light from old stars
which is expected to correlate with the mass of the targets.
  In spite of the superior photometry, the correlation between mid-infrared
luminosities and rotation rates extracted from neutral hydrogen profiles is
slightly degraded from the correlation found with I band luminosities. A color
correction recovers a correlation that provides comparable accuracy to that
available at I band (~20% 1sigma in an individual distance) while retaining the
advantages identified above. Without the color correction the relation between
linewidth and [3.6] magnitudes is M^{b,i,k,a}_{[3.6]} = -20.34 - 9.74 (log
W_{mx}^{i} -2.5). This description is found with a sample of 213 galaxies in 13
clusters that define the slope and 26 galaxies with Cepheid or tip of the red
giant branch distances that define the zero point. A color corrected parameter
M_{C_{[3.6]}} is constructed that has reduced scatter: M_{C_{[3.6]}} = -20.34 -
9.13 (log W_{mx}^{i} -2.5). Consideration of the 7 calibration clusters beyond
50 Mpc, outside the domain of obvious peculiar velocities, provides a
preliminary Hubble Constant estimate of H_0=74+/-5 km/s/Mpc.


title: Transparent conducting silver nanowire networks

abstract:
  We present a transparent conducting electrode composed of a periodic
two-dimensional network of silver nanowires. Networks of Ag nanowires are made
with wire diameters of 45-110 nm and pitch of 500, 700 and 1000 nm. Anomalous
optical transmission is observed, with an averaged transmission up to 91% for
the best transmitting network and sheet resistances as low as 6.5 {\Omega}/sq
for the best conducting network. Our most dilute networks show lower sheet
resistance and higher optical transmittance than an 80 nm thick layer of ITO
sputtered on glass. By comparing measurements and simulations we identify four
distinct physical phenomena that govern the transmission of light through the
networks: all related to the excitation of localized surface plasmons and
surface plasmon polaritons on the wires. The insights given in this paper
provide the key guidelines for designing high-transmittance and low-resistance
nanowire electrodes for optoelectronic devices, including thin-film solar
cells. For these latter, we discuss the general design principles to use the
nanowire electrodes also as a light trapping scheme.


title:
On Uniqueness for supercritical nonlinear wave and Schr\"odinger
  equations

abstract:
  In a recent paper, Struwe considered the Cauchy problem for a class of
nonlinear wave and Scr\"odinger equations.
  Under some assumptions on the nonlinearities, it was shown that uniqueness of
classical solutions can be obtained in the much larger class of distribution
solutions satisfying the energy inequality. As pointed out in [38], the
conditions on the nonlinearities are satisfied for any polynomial growth but
they fail to hold for higher growth (for example ${\rm e}^{u^2}$).
  Our aim here is to improve Struwe's result by showing that uniqueness holds
for more general nonlinearities including higher growth or oscillations.


title: Interactions and superconductivity in heavily doped MoS2

abstract:
  We analyze the microscopic origin and the physical properties of the
superconducting phase recently observed in MoS$_2$. We show how the combination
of the valley structure of the conduction band, the density dependence of the
screening of the long range Coulomb interactions, the short range electronic
repulsion, and the relative weakness of the electron-phonon interactions, makes
possible the existence of a phase where the superconducting order parameter has
opposite signs in different valleys, resembling the superconductivity found in
the pnictides and cuprates.


title:
Radiation Reaction and the Electromagnetic Energy-Momentum of Moving
  Relativistic Charged Membranes

abstract:
  The charged membrane of Dirac provides a stable electron model with finite
self energy. Its total mass $m$ has been previously calculated from the
Hamiltonian of the membrane. To complete the picture we evaluate it here on the
basis of the energy-momentum of its self field (radiation reaction) and obtain
the same result showing the consistency of the model. We show explicitly that
the old 4/3-problem does not arise. The electron's stability (the vanishing of
total ${T^{\mu \nu}}_{, \nu}$) is due to surface tension $\kappa$ of the
membrane, but the model is as simple as the point particle, with two parameters
$\kappa$ and $e$; the surface tension parameter $\kappa$ can be expressed in
terms of the mass $m$.


title:
Second Thresholds in BEC-BCS-Laser Crossover of Exciton-Polariton
  Systems

abstract:
  The mechanism of second thresholds observed in several experiments is
theoretically revealed by studying the BEC-BCS-laser crossover in
exciton-polariton systems. We found that there are two different types for the
second thresholds; one is a crossover within quasi-equilibrium phases and the
other is into non-equilibrium (lasing). In both cases, the light-induced band
renormalization causes gaps in the conduction and valence bands, which
indicates the exsistence of bound electron-hole pairs in contrast to earlier
expectations. We also show that these two types can be distinguished by the
gain spectra.


title:
A Scalable Distributed Architecture for Network- and QoS-aware Service
  Composition

abstract:
  Service-Oriented Computing (SOC) enables the composition of loosely coupled
service agents provided with varying Quality of Service (QoS) levels,
effectively forming a multiagent system (MAS). Selecting a (near-)optimal set
of services for a composition in terms of QoS is crucial when many functionally
equivalent services are available. As the number of distributed services,
especially in the cloud, is rising rapidly, the impact of the network on the
QoS keeps increasing. Despite this and opposed to most MAS approaches, current
service approaches depend on a centralized architecture which cannot adapt to
the network. Thus, we propose a scalable distributed architecture composed of a
flexible number of distributed control nodes. Our architecture requires no
changes to existing services and adapts from a centralized to a completely
distributed realization by adding control nodes as needed. Also, we propose an
extended QoS aggregation algorithm that allows to accurately estimate network
QoS. Finally, we evaluate the benefits and optimality of our architecture in a
distributed environment.


title:
Unoccupied electronic band structure of the semi-metallic Bi(111)
  surface probed with two-photon photoemission

abstract:
  While many photoemission studies have dealt with both the bulk band structure
and various surface states and resonances, the unoccupied electronic structure
above the Fermi level of the Bi(111) surface has not yet been measured directly
although understanding of this model semi-metal is of great interest for
topological insulators, spintronics and related fields. We use angle-resolved
two-photon photoemission to directly investigate the occupied and unoccupied p
bands of Bi, including the bulk hole pocket at the T point, as well as the
image potential states and surface states of Bi(111).


title: Modulation effect on the spin Hall resonance

abstract:
  The effect of a weak electrical modulation on spin Hall resonance is
presented here. In presence of the magnetic field normal to the plane of the
motion of electron, the Landau levels are formed which get broadened due to the
weak modulation. The width of the Landau levels broadening are periodic with
the inverse magnetic field. There is a certain magnetic field for which the
crossing of Landau levels between spin-up and spin-down branches takes place.
This gives rise to the resonance in the spin Hall conductivity (SHC). The
Landau levels broadening or the energy correction due to the modulation removes
the singularity appears at the resonance field in SHC, leading to the
suppression of SHC accompanied by two new peaks around this point. The
separation of these two peaks increases with the increase of the modulation
period. Moreover, we find that the height of the two peaks are also modulation
period dependent.


title: Goldstino superfields in AdS_4

abstract:
  Spontaneous breaking of global supersymmetries results in Goldstino fields
which provide a nonlinear realisation of the supersymmetry algebra. A finite
supersymmetry transformation of a Goldstino field can be used to generate a
superfield whose components provide a linear realisation of the supersymmetry
algebra. This construction also automatically determines the action of the
algebra of supercovariant derivatives on Goldstino superfields, essential to
the efficient computation of manifestly supersymmetric component actions for
the Goldstinos, including coupling to matter fields. In this paper, we extend
known constructions of Goldstino superfields resulting from spontaneous
breaking of supersymmetry in flat four-dimensional N =1 superspace to
spontaneous breaking of N =1 and N =2 supersymmetry in AdS_4.


title:
On the Interpolation of Model Atmospheres and High-Resolution Synthetic
  Stellar Spectra

abstract:
  We present tests carried out on optical and infrared stellar spectra to
evaluate the accuracy of different types of interpolation. Both model
atmospheres and continuum normalized fluxes were interpolated. In the first
case we used linear interpolation, and in the second linear, cubic spline,
cubic-Bezier and quadratic-Bezier methods. We generated 400 ATLAS9 model
atmospheres with random values of the atmospheric parameters for these tests,
spanning between -2.5 and +0.5 in [Fe/H], from 4500 to 6250 K in effective
temperature, and 1.5 to 4.5 dex in surface gravity. Synthesized spectra were
created from these model atmospheres, and compared with spectra derived by
interpolation. We found that the most accurate interpolation algorithm among
those considered in flux space is cubic-Bezier, closely followed by
quadratic-Bezier and cubic splines. Linear interpolation of model atmospheres
results in errors about a factor of two larger than linear interpolation of
fluxes, and about a factor of four larger than high order flux interpolations.


title: Conditional quasi-greedy bases in Hilbert and Banach spaces

abstract:
  We show that, for quasi-greedy bases in Hilbert spaces, the associated
conditionality constants grow at most as $O(\log N)^{1-\epsilon}$, for some
$\epsilon>0$, answering a question by Temlyakov. We show the optimality of this
bound with an explicit construction, based on a refinement of the method of
Olevskii. This construction leads to other examples of quasi-greedy bases with
large $k_N$ in Banach spaces, which are of independent interest.


title: A generalisation of Nash's theorem with higher-order functionals

abstract:
  The recent theory of sequential games and selection functions by Mar- tin
Escardo and Paulo Oliva is extended to games in which players move
simultaneously. The Nash existence theorem for mixed-strategy equilibria of
finite games is generalised to games defined by selection functions. A normal
form construction is given which generalises the game-theoretic normal form,
and its soundness is proven. Minimax strategies also gener- alise to the new
class of games and are computed by the Berardi-Bezem- Coquand functional,
studied in proof theory as an interpretation of the axiom of countable choice.


title: On the collision of two projectiles on two targets in the BFKL approach

abstract:
  High-energy collisions of two nucleons on two nucleons are studied in the
BFKL approach in the leading approximation in $\alpha_sN_c$. Diagrams with
redistribution of colour are considered. It is found that intermediate BKP
states consisting of 4 reggeized gluons give a contribution which may be
leading in deuteron-deuteron scattering and thus experimentally observable.


title: A model of individual clustering with vanishing diffusion

abstract:
  We consider a model of individual clustering with two specific reproduction
rates and small diffusion parameter in one space dimension. It consists of a
drift-diffusion equation for the population density coupled to an elliptic
equation for the velocity of individuals. We prove the convergence (in suitable
topologies) of the solution of the problem to the unique solution of the limit
transport problem, as the diffusion coefficient tends to zero.