title:
Efficient multiband absorber based on 1D periodic metal-dielectric
  photonic crystals with a reflective substrate

abstract:
  We propose an efficient multiband absorber comprising a truncated
one-dimensional periodic metal-dielectric photonic crystal and a reflective
substrate. The reflective substrate is actually an optically thick metallic
film. Such a planar device is easier to fabricate compared with the absorbers
with complicated shapes. For a 4-unit cell device, all of the four absorption
peaks can be optimized with efficiencies higher than 95%. Moreover, those
absorption peaks are insensitive to both polarization and incident angle. The
influences of the geometrical parameters along with the refractive index of the
dielectric on the device performance are discussed as well. Furthermore, it is
found that the number of absorption peaks within each photonic band exactly
corresponds to the number of the unit cells because the truncated photonic
crystal lattices have the function of selecting resonant modes. It is also
displayed that the total absorption efficiency gradually increases when there
are more metal-dielectric unit cells placing on top of the metallic substrate.
Our work is expected to have some potential applications in the areas of solar
energy harvesting and thermal emission tailoring.


title:
Search for the SM Higgs Boson Produced in Association with a Vector
  Boson and Decaying to Bottom Quarks

abstract:
  A search for the Higgs boson produced in association with a W or Z boson and
decaying to bottom quarks is presented. A sample of approximately 24/fb of data
recorded by the CMS experiment at the Large Hadron Collider, operating at
center-of-mass energies of 7 TeV and 8 TeV in 2011 and 2012, respectively, is
used to search for events consistent with the signature of two b jets recoiling
with high momentum from a W(lnu), Z(ll), or Z(nunu) decay, where l = electron
or muon (or hadronically-decaying tau particle in the case of W bosons).
Observed signal significance and 95% confidence level upper limits on the
production cross section relative to the Standard Model prediction are
presented for the 110-135 GeV Higgs mass range.


title: Regina Lectures on Fat Points

abstract:
  These notes are a record of lectures given in the Workshop on Connections
Between Algebra and Geometry at the University of Regina, May 29--June 1, 2012.
The lectures were meant as an introduction to current research problems related
to fat points for an audience that was not expected to have much background in
commutative algebra or algebraic geometry (although sections 8 and 9 of these
notes demand somewhat more background than earlier sections).


title:
Suzaku observations of the diffuse x-ray emission across the fermi
  bubbles' edges

abstract:
  We present Suzaku X-ray observations along two edge regions of the Fermi
Bubbles, with eight ~20 ksec pointings across the northern part of the North
Polar Spur (NPS) surrounding the north bubble and six across the southernmost
edge of the south bubble. After removing compact X-ray features, diffuse X-ray
emission is clearly detected and is well reproduced by a three-component
spectral model consisting of unabsorbed thermal emission (temperature kT ~0.1
keV from the Local Bubble (LB), absorbed kT ~0.3 keV thermal emission related
to the NPS and/or Galactic Halo (GH), and a power-law component at a level
consistent with the cosmic X-ray background. The emission measure (EM) of the
0.3 keV plasma decreases by ~50% toward the inner regions of the north-east
bubble, with no accompanying temperature change. However, such a jump in the EM
is not clearly seen in the south bubble data. While it is unclear if the NPS
originates from a nearby supernova remnant or is related to previous activity
within/around the Galactic Center, our Suzaku observations provide evidence
suggestive of the latter scenario. In the latter framework, the presence of a
large amount of neutral matter absorbing the X-ray emission as well as the
existence of the kT ~ 0.3 keV gas can be naturally interpreted as a weak shock
driven by the bubbles' expansion in the surrounding medium, with velocity v_exp
~300 km/s (corresponding to shock Mach number M ~1.5), compressing the GH gas
to form the NPS feature. We also derived an upper limit for any non-thermal
X-ray emission component associated with the bubbles and demonstrate, that in
agreement with the findings above, the non-thermal pressure and energy
estimated from a one-zone leptonic model of its broad-band spectrum, are in
rough equilibrium with that of the surrounding thermal plasma.


title: Multiplication operators on the Bergman spaces of pseudoconvex domains

abstract:
  Given an n-tuple of multiplication operators on the Bergman space of a
bounded pseudoconvex domain in C^n, we study the algebra of their commutants.
In particular, we give a geometric description of the maximal C*-subalgebra of
this algebra.


title: Differential Rings from Special K\"ahler Geometry

abstract:
  We study triples of graded rings defined over the deformation spaces for
certain one-parameter families of Calabi-Yau threefolds. These rings are
analogues of the rings of modular forms, quasi-modular forms and
almost-holomorphic modular forms. We also discuss some of their applications in
solving the holomorphic anomaly equations.


title: Identifying Influential Entries in a Matrix

abstract:
  For any matrix A in R^(m x n) of rank \rho, we present a probability
distribution over the entries of A (the element-wise leverage scores of
equation (2)) that reveals the most influential entries in the matrix. From a
theoretical perspective, we prove that sampling at most s = O ((m + n) \rho^2
ln (m + n)) entries of the matrix (see eqn. (3) for the precise value of s)
with respect to these scores and solving the nuclear norm minimization problem
on the sampled entries, reconstructs A exactly. To the best of our knowledge,
these are the strongest theoretical guarantees on matrix completion without any
incoherence assumptions on the matrix A. From an experimental perspective, we
show that entries corresponding to high element-wise leverage scores reveal
structural properties of the data matrix that are of interest to domain
scientists.


title: Bergman kernels and eigenvalue estimate of $\bar{\partial}$-laplacian

abstract:
  Let $(X,\omega)$ be a compact K\"{a}hler manifold. Let $(L,h)$ be a hermitian
holomorphic line bundle over $X$, such that $\Theta_{L,h}\geq
-\varepsilon\omega$ for a small $\varepsilon>0$, $E$ be a holomorphic line
bundle over $X$. For $k\in \mathbb{N}_+$, denote by $X_k:=(X,\omega^k)$ the
K\"{a}hler manifold $X$ with new scaled metric $\omega^k=k\omega$. Estimates of
the number of eigenvalues smaller than $\lambda$ of the $\debar$-Laplacian on
forms on $X_k$ with values in $L^k\otimes E$ are presented for $0\leq
\lambda<k$. In particular, when $\lambda=0$, we get a numeric bound for the
cohomology groups.


title:
Fulde-Ferrell pairing instability of a Rashba spin-orbit coupled Fermi
  gas

abstract:
  We theoretically analyze the pairing instability of a three-dimensional
ultracold atomic Fermi gas towards a Fulde-Ferrell superfluid, in the presence
of Rashba spin-orbit coupling and in-plane Zeeman field. We use the standard
Thouless criterion for the onset of superfluidity, with which the effect of
pair fluctuations is partially taken into account by approximately using a
mean-field chemical potential at zero temperature. This gives rise to an
improved prediction of the superfluid transition temperature beyond mean-field,
particularly in the strong-coupling unitary limit. We also investigate the
pairing instability with increasing Rashba spin-orbit coupling, along the
crossover from a Bardeen-Cooper-Schrieffer superfluid to a Bose-Einstein
condensate of Rashbons (i.e., the tightly bound state of two fermions formed by
strong Rashba spin-orbit coupling


title:
Probing the critical exponent of superfluid fraction in a strongly
  interacting Fermi gas

abstract:
  We theoretically investigate the critical behavior of second sound mode in a
harmonically trapped ultracold atomic Fermi gas with resonant interactions.
Near the superfluid phase transition with critical temperature $T_{c}$, the
frequency or the sound velocity of second sound mode depends crucially on the
critical exponent $\beta$ of superfluid fraction. In an isotropic harmonic
trap, we predict that the mode frequency diverges like
$(1-T/T_{c})^{\beta-1/2}$ when $\beta<1/2$. In a highly elongated trap, the
speed of second sound reduces by a factor $1/\sqrt{2\beta+1}$ from that in a
homogeneous three-dimensional superfluid. Our prediction could be readily
tested by measurements of second sound wave propagation in a setup such as that
exploited by Sidorenkov \textit{et al.} {[}Nature \textbf{498}, 78 (2013){]}
for resonantly interacting lithium-6 atoms, once the experimental precision is
improved.


title:
A Classification of Points on Tensor Product Surfaces in
  Four-Dimensional Euclidean Space

abstract:
  In this paper, based on the theory of surfaces in the four-dimensional
Euclidean space which generalizes the theory of surfaces in three-dimensional
Euclidean space, beside other results, we will give a characterization of
points on particular kind of these surfaces.


title:
ECA: High Dimensional Elliptical Component Analysis in non-Gaussian
  Distributions

abstract:
  We present a robust alternative to principal component analysis (PCA) ---
called elliptical component analysis (ECA) --- for analyzing high dimensional,
elliptically distributed data. ECA estimates the eigenspace of the covariance
matrix of the elliptical data. To cope with heavy-tailed elliptical
distributions, a multivariate rank statistic is exploited. At the model-level,
we consider two settings: either that the leading eigenvectors of the
covariance matrix are non-sparse or that they are sparse. Methodologically, we
propose ECA procedures for both non-sparse and sparse settings. Theoretically,
we provide both non-asymptotic and asymptotic analyses quantifying the
theoretical performances of ECA. In the non-sparse setting, we show that ECA's
performance is highly related to the effective rank of the covariance matrix.
In the sparse setting, the results are twofold: (i) We show that the sparse ECA
estimator based on a combinatoric program attains the optimal rate of
convergence; (ii) Based on some recent developments in estimating sparse
leading eigenvectors, we show that a computationally efficient sparse ECA
estimator attains the optimal rate of convergence under a suboptimal scaling.


title: Adiabatic computing using 2-local Hamiltonians on a line

abstract:
  Here we consider the power of a line of quantum particles under a
nearest-neighbor 2-local Hamiltonian. Currently, it has been shown that 8-state
particles are sufficient for universal adiabatic computing. We improve this
result to show that 7-state particles are sufficient.


title:
$J/\psi$ production at low $p_T$ in Au+Au and Cu+Cu collisions at
  $\sqrt{s_{_{NN}}}$ = 200 GeV at STAR

abstract:
  The $\jpsi$ $\pt$ spectrum and nuclear modification factor ($\raa$) are
reported for $\pt < 5 \ \gevc$ and $|y|<1$ from 0\% to 60\% central Au+Au and
Cu+Cu collisions at $\snn = 200 \ \gev$ at STAR. A significant suppression of
$\pt$-integrated $\jpsi$ production is observed in central Au+Au events. The
Cu+Cu data are consistent with no suppression, although the precision is
limited by the available statistics. $\raa$ in Au+Au collisions exhibits a
strong suppression at low transverse momentum and gradually increases with
$\pt$. The data are compared to high-$\pt$ STAR results and previously
published BNL Relativistic Heavy Ion Collider results. Comparing with model
calculations, it is found that the invariant yields at low $\pt$ are
significantly above hydrodynamic flow predictions but are consistent with
models that include color screening and regeneration.


title: Pursuit Fractal Analysis of Time-Series Data

abstract:
  In this study, we present a method to measure changes over time of fractal
dimension. We confirmed that our method can calculate the fractal dimension
with the same precision as conventional methods, and tracking performance of
our method is higher than that of the conventional methods.


title:
Effective contact model for geometry-independent conductance
  calculations in graphene

abstract:
  A geometry-independent effective model for the contact self-energies is
proposed to calculate the quantum conductance of patterned graphene devices
using Green's functions. A Corbino disk, being the simplest device where the
contacts can not be modeled as semi-infinite ribbons, is chosen to illustrate
this approach. This system's symmetry allows an analytical solution against
which numerical calculations on the lattice can be benchmarked. The effective
model perfectly describes the conductance of Corbino disks at low-to-moderate
energies, and is robust against the size of the annular device region, the
number of atoms on the edge, external magnetic fields, or electronic disorder.
The contact model considered here affords an expedite, flexible, and
geometry-agnostic approach easily allows the consideration of device dimensions
encompassing several million atoms, and realistic radial dimensions of a few
hundreds of nanometers.


title: Notes on Mayer Expansions and Matrix Models

abstract:
  Mayer cluster expansion is an important tool in statistical physics to
evaluate grand canonical partition functions. It has recently been applied to
the Nekrasov instanton partition function of $\mathcal{N}=2$ 4d gauge theories.
The associated canonical model involves coupled integrations that take the form
of a generalized matrix model. It can be studied with the standard techniques
of matrix models, in particular collective field theory and loop equations. In
the first part of these notes, we explain how the results of collective field
theory can be derived from the cluster expansion. The equalities between free
energies at first orders is explained by the discrete Laplace transform
relating canonical and grand canonical models. In a second part, we study the
canonical loop equations and associate them to similar relations on the grand
canonical side. It leads to relate the multi-point densities, fundamental
objects of the matrix model, to the generating functions of multi-rooted
clusters. Finally, a method is proposed to derive loop equations directly on
the grand canonical model.


title:
An Extreme Learning Machine Approach to Predicting Near Chaotic HCCI
  Combustion Phasing in Real-Time

abstract:
  Fuel efficient Homogeneous Charge Compression Ignition (HCCI) engine
combustion timing predictions must contend with non-linear chemistry,
non-linear physics, period doubling bifurcation(s), turbulent mixing, model
parameters that can drift day-to-day, and air-fuel mixture state information
that cannot typically be resolved on a cycle-to-cycle basis, especially during
transients. In previous work, an abstract cycle-to-cycle mapping function
coupled with $\epsilon$-Support Vector Regression was shown to predict
experimentally observed cycle-to-cycle combustion timing over a wide range of
engine conditions, despite some of the aforementioned difficulties. The main
limitation of the previous approach was that a partially acausual randomly
sampled training dataset was used to train proof of concept offline
predictions. The objective of this paper is to address this limitation by
proposing a new online adaptive Extreme Learning Machine (ELM) extension named
Weighted Ring-ELM. This extension enables fully causal combustion timing
predictions at randomly chosen engine set points, and is shown to achieve
results that are as good as or better than the previous offline method. The
broader objective of this approach is to enable a new class of real-time model
predictive control strategies for high variability HCCI and, ultimately, to
bring HCCI's low engine-out NOx and reduced CO2 emissions to production
engines.


title: Model independent constraints of the averaged neutrino masses revisited

abstract:
  Averaged neutrino masses defined by $\la m_\nu\ra_{ab} \equiv\left|
\sum_{j=1}^{3}U_{aj}U_{bj}m_j\right|$ ($a,b=e,\mu,\tau$) are reanalyzed using
up-to-date observed MNS parameters and neutrino masses by the neutrino
oscillation experiments together with the cosmological constraint on neutrino
masses. The values of $\la m_\nu\ra_{ab}$ are model-independently evaluated in
terms of effective neutrino mass defined by $\overline{m_\nu}\equiv\left(\sum
|U_{ej}|^2m_j^2\right)^{1/2}$ which is observable in the single beta decay. We
obtain lower bound for $\langle m_\nu \rangle_{ee}$ in the inverted
hierarchy(IH) case, $17~\mbox{meV} \leq \langle m_\nu \rangle_{ee}$ and one for
$\langle m_\nu \rangle_{\tau \mu}$ in the normal hierarchy(NH) case,
$5~\mbox{meV}\leq \langle m_\nu \rangle_{\tau \mu}$. We also obtain that all
the averaged masses $\la m_\nu\ra_{ab}$ have upper bounds which are at most
$80~\mbox{meV}$.


title: Unirationality of Ueno-Campana's threefold

abstract:
  We shall prove that the threefold studied in the paper "Remarks on an Example
of K. Ueno" by F. Campana is unirational. This gives an affirmative answer to a
question posed in the paper above and also in the book by K. Ueno,
"Classification theory of algebraic varieties and compact complex spaces".


title:
Higher Dirac cohomology of modules with generalized infinitesimal
  character

abstract:
  We modify the definition of Dirac cohomology in such a way that the standard
properties of the usual Dirac cohomology, valid for modules with infinitesimal
character, become valid also for modules with only generalized infinitesimal
character.


title:
Semi-classical properties of Berezin--Toeplitz operators with
  $\cC^k$--\,symbol

abstract:
  We obtain the semi-classical expansion of the kernels and traces of Toeplitz
operators with $\cC^k$--\,symbol on a symplectic manifold. We also give a
semi-classical estimate of the distance of a Toeplitz operator to the space of
self-adjoint and multiplication operators.


title:
Asymptotic expansion for characteristic function in Heston stochastic
  volatility model with fast mean-reverting correction

abstract:
  In this note, we derive the characteristic function expansion for logarithm
of the underlying asset price in corrected Heston model as proposed by Fouque
and Lorig.


title: Infinitesimal and square-zero extensions of simplicial algebras

abstract:
  We introduce the notions of infinitesimal extension and square-zero extension
in the context of simplicial commutatie algebras. We next investigate their
mutual relationship and we show that the Postnikov tower of a simplicial
commutative algebra is built out of square-zero extensions. We conclude the
notes with two applications: we give connectivity estimates for the cotangent
complex and we show how obstructions can be seen as deformations over
simplicial rings.


title:
Isomorphism Check for $2^n$ Factorial Designs with Randomization
  Restrictions

abstract:
  Factorial designs with randomization restrictions are often used in
industrial experiments when a complete randomization of trials is impractical.
In the statistics literature, the analysis, construction and isomorphism of
factorial designs has been extensively investigated. Much of the work has been
on a case-by-case basis -- addressing completely randomized designs, randomized
block designs, split-plot designs, etc. separately. In this paper we take a
more unified approach, developing theoretical results and an efficient
relabeling strategy to both construct and check the isomorphism of multi-stage
factorial designs with randomization restrictions. The examples presented in
this paper particularly focus on split-lot designs.


title:
Nonsingular electrodynamics of a rotating black hole boosted in an
  asymptotically uniform magnetic test field

abstract:
  We extend the Wald solution to a black hole that is also boosted. More
specifically, we derive analytic solutions for the Maxwell equations for a
rotating black hole moving at constant speed in an asymptotically uniform
magnetic test field. By adopting Kerr-Schild coordinates we avoid singular
behaviours at the horizon and obtain a complete description of the charge and
current distributions in terms of the black-hole spin and boost. Using this
solution, we compute the energy losses expected when charged particles are
accelerated along the magnetic field lines, improving previous estimates that
had to cope with singular electromagnetic fields on the horizon. When used to
approximate the emission from binary black holes in a uniform magnetic field,
our estimates match reasonably well those from numerical-relativity
calculations in the force-free approximation.


title: Stochastic flows and an interface SDE on metric graphs

abstract:
  This paper consists in the study of a stochastic differential equation on a
metric graph, called an interface SDE $(\hbox{ISDE})$. To each edge of the
graph is associated an independent white noise, which drives $(\hbox{ISDE})$ on
this edge. This produces an interface at each vertex of the graph. We first do
our study on star graphs with $N\ge 2$ rays. The case $N=2$ corresponds to the
perturbed Tanaka's equation recently studied by Prokaj \cite{MR18} and Le
Jan-Raimond \cite{MR000} among others. It is proved that $(\hbox{ISDE})$ has a
unique in law solution, which is a Walsh's Brownian motion. This solution is
strong if and only if $N=2$.
  Solution flows are also considered. There is a (unique in law) coalescing
stochastic flow of mappings $\p$ solving $(\hbox{ISDE})$. For $N=2$, it is the
only solution flow. For $N\ge 3$, $\p$ is not a strong solution and by
filtering $\p$ with respect to the family of white noises, we obtain a (Wiener)
stochastic flow of kernels solution of $(\hbox{ISDE})$. There are no other
Wiener solutions. Our previous results \cite{MR501011} in hand, these results
are extended to more general metric graphs.
  The proofs involve the study of $(X,Y)$ a Brownian motion in a two
dimensional quadrant obliquely reflected at the boundary, with time dependent
angle of reflection. We prove in particular that, when $(X\_0,Y\_0)=(1,0)$ and
if $S$ is the first time $X$ hits $0$, then $Y\_S^2$ is a beta random variable
of the second kind. We also calculate $\EE[L\_{\sigma\_0}]$, where $L$ is the
local time accumulated at the boundary, and $\sigma\_0$ is the first time
$(X,Y)$ hits $(0,0)$.


title:
Homogenization-Based Numerical Mathods, Homogenization, Asymptotic
  Analysis, Asymptotic Expansion, Numerical Simulation

abstract:
  In this note, a classification of Homogenization-Based Numerical Methods and
(in particular) of Numerical Methods that are based on the Two-Scale
Convergence is done. In this classification stand: Direct Homogenization-Based
Numerical Methods; H-Measure-Based Numerical Methods; Two-Scale Numerical
Methods and TSAPS: Two-Scale Asymptotic Preserving Schemes.


title:
ANOVA decomposition of conditional Gaussian processes for sensitivity
  analysis with dependent inputs

abstract:
  Complex computer codes are widely used in science to model physical systems.
Sensitivity analysis aims to measure the contributions of the inputs on the
code output variability. An efficient tool to perform such analysis are the
variance-based methods which have been recently investigated in the framework
of dependent inputs. One of their issue is that they require a large number of
runs for the complex simulators. To handle it, a Gaussian process regression
model may be used to approximate the complex code. In this work, we propose to
decompose a Gaussian process into a high dimensional representation. This leads
to the definition of a variance-based sensitivity measure well tailored for
non-independent inputs. We give a methodology to estimate these indices and to
quantify their uncertainty. Finally, the approach is illustrated on toy
functions and on a river flood model.


title:
On the Regularity of the Solutions for Cauchy Problem of Incompressible
  3D Navier-Stokes Equation

abstract:
  In this paper we will prove that the vorticity belongs to L1(0; T ; L2(R3))
for the Cauchy problem of 3D incompressible Navier-Stokes equation, then the
existence of a global smooth solution is obtained. Our approach is to construct
a set of auxiliary problems to approximate the original one of vorticity
equation.


title:
Online Coordinated Charging Decision Algorithm for Electric Vehicles
  without Future Information

abstract:
  The large-scale integration of plug-in electric vehicles (PEVs) to the power
grid spurs the need for efficient charging coordination mechanisms. It can be
shown that the optimal charging schedule smooths out the energy consumption
over time so as to minimize the total energy cost. In practice, however, it is
hard to smooth out the energy consumption perfectly, because the future PEV
charging demand is unknown at the moment when the charging rate of an existing
PEV needs to be determined. In this paper, we propose an Online cooRdinated
CHARging Decision (ORCHARD) algorithm, which minimizes the energy cost without
knowing the future information. Through rigorous proof, we show that ORCHARD is
strictly feasible in the sense that it guarantees to fulfill all charging
demands before due time. Meanwhile, it achieves the best known competitive
ratio of 2.39. To further reduce the computational complexity of the algorithm,
we propose a novel reduced-complexity algorithm to replace the standard convex
optimization techniques used in ORCHARD. Through extensive simulations, we show
that the average performance gap between ORCHARD and the offline optimal
solution, which utilizes the complete future information, is as small as 14%.
By setting a proper speeding factor, the average performance gap can be further
reduced to less than 6%.


title: Topological matter: graphene and superfluid 3He

abstract:
  Physics of graphene and physics of superfluid phases of 3He have many common
features. Both systems are topological materials where quasiparticles behave as
relativistic massless (Weyl, Majorana or Dirac) fermions. We formulate the
points where these features are overlapping. This will allow us to use graphene
for study the properties of superfluid 3He, to use superfluid 3He for study the
properties of graphene, and to use the combination to study the physics of
topological quantum vacuum. We suggest also some particular experiments with
superfluid 3He using graphene as an atomically thin membrane impenetrable for
He atoms but allowing for spin, momentum and energy transfer.


title:
Electronic band structure, Fermi surface, structural and elastic
  properties of two polymorphs of MgFeSeO as possible new superconducting
  systems

abstract:
  By means of DFT-based first-principles calculations, we examine two
polymorphs of the newly synthesized 1111-like MgFeSeO as possible new
superconducting systems. We have found that the polymorph with blocks [MgO],
where Mg atoms are placed in the centers of O4 tetrahedra, is dynamically
unstable - unlike the ZrCuSiAs-type polymorph with oxygen atoms placed in the
centers of Mg4 tetrahedra. The characterization of this material covers the
structural, elastic properties, electronic band structure, density of
electronic states, and Fermi surface. Our calculations suggest that a high
critical temperature for MgFeSeO may be achieved as a result of electron or
hole doping through ion substitutions or through creation of lattice vacancies.


title: Fast & Scalded: Capillary Leidenfrost Droplets in micro-Ratches

abstract:
  In this Fluid Dynamics Videos submitted to the 31st Gallery of Fluid Motion,
(find a different version here http://youtu.be/CS0c05WQ_js) we illustrate the
special dynamics of capillary self-propelled Leidenfrost droplets in
micrometric Ratchets. In order to be able to propel water droplets of sizes of
the order of 1 mm, micro-ratchets were produced by direct material removal
using a picosecond pulsed laser source. Surface micro-patterning with
picosecond laser pulses allows creating a well controlled topography on a
variety of substrates, with a resolution typically in the micron range. More
information can be found in references.


title: Selection Policy: Fighting against Filter Effect in Network of Caches

abstract:
  Many Information Centric Networking (ICN) proposals use a network of caches
to bring the contents closer to the consumers, reduce the load on producers and
decrease the unnecessary retransmission for ISPs. Nevertheless, the existing
cache management scheme for the network of caches obtain poor performance. The
main reason for performance degradation in a network of caches is the filter
effect of the replacement policy. A cache serves the requests that generate
cache-hits and forwards the requests that generate cache-misses. This filtering
changes the pattern of requests and leads to decreased hit ratios in the
subsequent caches. In this paper, we propose a coordinated caching scheme to
solve the filter effect problem by introducing the selection policy. This
policy manages a cache such that: i) the cache obtains a high hit ratio ii) the
missed requests from the cache can be used by subsequent caches to obtain a
high hit ratio. Our coordinated selection scheme achieves an overall hit ratio
of a network of caches equivalent to that of edge routers with big caches.
Moreover, our scheme decreases the average number of evictions per cache slot
by four order of magnitude compared to the LRU universal caching.


title: On some residual properties of Baumslag -- Solitar groups

abstract:
  A survey of results on the residual properties of Baumslag -- Solitar groups
which have been obtained to date.


title:
Comment on "Exact Analytic Second Virial Coefficient for the
  Lennard-Jones Fluid" (arXiv:0909.3326v1)

abstract:
  The asymptotic expansion for $T\rightarrow 0$ from Byung Chan Eu of
$B_2(T)=-16\sqrt{2\pi}v_0e^{\varepsilon\beta}(\varepsilon\beta)^{3/2} \biggl[
1+\dfrac{19}{16\epsilon\beta}+\dfrac{105}{512(\epsilon\beta)^2}\dots \biggr]$
is wrong. The correct expression is
$B_2(T)=-2\sqrt{2\pi}v_0e^{\varepsilon\beta}(\varepsilon\beta)^{-1/2}\biggl[
1+\dfrac{15}{16\varepsilon\beta}+\dfrac{945}{512(\varepsilon\beta)^2}
+\dots\biggr]$.


title:
Stability of charged black holes in string theory under charged massive
  scalar perturbations

abstract:
  Similar to the superradiant effect in Reissner-Nordstr\"{o}m black hole, a
charged scalar field can be amplified when impinging on the charged black hole
in string theory. According to the black-hole bomb mechanism,the mass term of
the incident field can works as the reflecting mirror, which may trigger the
instability of black hole. We study the possible instability triggered by
superradiant effect and demonstrate that the charged black hole in string
theory is stable against the massive charged scalar perturbation. The reason is
that there is no trapping potential well in the black hole exterior which is
separated from the horizon by a potential barrier and there is no bound states
in the superradiant regime.


title: The potential for a high power FFAG proton driver for ADS

abstract:
  Fixed-field alternating gradient accelerators are promising candidates for
next-generation 10 MW-class high power proton drivers. Recent advances in
lattice design of non-scaling FFAGs have progressed toward both isochronicity
and chromatic correction. The resulting 1 GeV non-scaling FFAG design may be
able to support a continuous (CW) beam with far lower peak current than the
pulsed alternative. A 6-cell non-scaling FFAG design is described and recent
work in modeling 3D space charge using the OPAL framework is presented,
including fixed energy studies and beam dynamics with fast acceleration in the
so-called serpentine channel.


title: Orbifold GW theory as Hurwitz-Frobenius submanifold

abstract:
  In this paper we study the relation between the Frobenius manifolds of GW
theory and Hurwitz-Frobenius manifold. We prove that orbifold GW theory of
\PP^1(2,2,2,2) is isomorphic to the submanifold in the Hurwitz-Frobenius
manifold of ramified coverings of the sphere by the genus 1 curve with the
ramification profile (2,2,2,2) over infinity.


title:
Unveiling the Origin of the Insulating Ferromagnetism in LaMnO3 Thin
  Film

abstract:
  By combining genetic algorithm optimizations, first-principles calculations
and the double-exchange model studies, we have unveiled that the exotic
insulating ferromagnetism in LaMnO3 thin film originates from the previously
unreported G-type d_{3z^2-r^2}/d_{x^2-y^2} orbital ordering. An insulating gap
opens as a result of both the orbital ordering and the strong electron-phonon
coupling. Therefore, there exist two strain induced phase transitions in the
LaMnO3 thin film, from the insulating A-type antiferromagnetic phase to the
insulating ferromagnetic phase and then to the metallic ferromagnetic phase.
These phase transitions may be exploited in tunneling magnetoresistance and
tunneling electroresistance related devices.


title: Multilevel Monte Carlo simulation of Coulomb collisions

abstract:
  We present a new, for plasma physics, highly efficient multilevel Monte Carlo
numerical method for simulating Coulomb collisions. The method separates and
optimally minimizes the finite-timestep and finite-sampling errors inherent in
the Langevin representation of the Landau-Fokker-Planck equation. It does so by
combining multiple solutions to the underlying equations with varying numbers
of timesteps. For a desired level of accuracy epsilon, the computational cost
of the method is order(epsilon^{-2}) or order(epsilon^{-2} (\ln epsilon)^2),
depending on the underlying discretization, Milstein or Euler-Maruyama
respectively. This is to be contrasted with a cost of order(epsilon^{-3}) for
direct simulation Monte Carlo or binary collision methods. We successfully
demonstrate the method with a classic beam diffusion test case in 2D, making
use of the Levy area approximation for the correlated Milstein cross terms, and
generating a computational saving of a factor of 100 for epsilon = 10^{-5}. We
discuss the importance of the method for problems in which collisions
constitute the computational rate limiting step, and its limitations.


title:
Magnetic structure of NdMn$_{0.8}$Fe$_{0.2}$O$_{3+\delta}$; neutron
  powder diffraction experiment

abstract:
  The magnetic structure of the mixed antiferromagnet
NdMn$_{0.8}$Fe$_{0.2}$O$_3$ was resolved. Neutron powder diffraction data
definitively resolve the Mn-sublattice with a magnetic propagation vector ${\bf
k} = (000)$ and with the magnetic structure (A$_x$, F$_y$, G$_z$) for 1.6~K~$<
T < T_N (\approx 59$~K). The Nd-sublattice has a (0, f$_y$, 0) contribution in
the same temperature interval. The Mn sublattice undergoes spin-reorientation
transition at $T_1 \approx 13$~K while the Nd magnetic moment keep ordered
abruptly increases at this temperature. Powder X-ray diffraction shows a strong
magnetoelastic effect at $T_N$ but no additional structural phase transitions
from 2~K to 300~K. Density functional theory calculations confirm the magnetic
structure of the undoped NdMnO$_3$ as part of our analysis. Taken together,
these results show the magnetic structure of Mn-sublattice in
NdMn$_{0.8}$Fe$_{0.2}$O$_3$ is a combination of the Mn and Fe parent compounds,
but the magnetic ordering of Nd sublattice spans over broader temperature
interval than in case of NdMnO$_3$ and NdFeO$_3$. This result is a consequence
of the fact that the Nd ions do not order independently, but via polarization
from Mn/Fe sublattice.


title:
Stability of Mixed-Strategy-Based Iterative Logit Quantal Response
  Dynamics in Game Theory

abstract:
  Using the Logit quantal response form as the response function in each step,
the original definition of static quantal response equilibrium (QRE) is
extended into an iterative evolution process. QREs remain as the fixed points
of the dynamic process. However, depending on whether such fixed points are the
long-term solutions of the dynamic process, they can be classified into stable
(SQREs) and unstable (USQREs) equilibriums. This extension resembles the
extension from static Nash equilibriums (NEs) to evolutionary stable solutions
in the framework of evolutionary game theory. The relation between SQREs and
other solution concepts of games, including NEs and QREs, is discussed. Using
experimental data from other published papers, we perform a preliminary
comparison between SQREs, NEs, QREs and the observed behavioral outcomes of
those experiments. For certain games, we determine that SQREs have better
predictive power than QREs and NEs.


title:
Accurate Bottom-Quark Mass from Borel QCD Sum Rules for the Decay
  Constants of $B$ and $B_s$ Mesons

abstract:
  We show that in the context of QCD sum rules a strong (anti-) correlation
between the $b$-quark mass $m_b$ and the $B$-meson's decay constant $f_B$
emerges: $\delta f_B/f_B\approx -8 \delta m_b/m_b.$ This observation allows us
to derive a precise value of $m_b$ from a Borel sum rule for the two-point
correlator of heavy-light currents exploiting accurate $f_B$ results from
lattice QCD as input: $\bar{m}_b(\bar{m}_b)=(4.247\pm0.034)$ GeV.


title: Stabilizing discrete-time switched linear systems

abstract:
  This article deals with stabilizing discrete-time switched linear systems.
Our contributions are threefold: Firstly, given a family of linear systems
possibly containing unstable dynamics, we propose a large class of switching
signals that stabilize a switched system generated by the switching signal and
the given family of systems. Secondly, given a switched system, a sufficient
condition for the existence of the proposed switching signal is derived by
expressing the switching signal as an infinite walk on a directed graph
representing the switched system. Thirdly, given a family of linear systems, we
propose an algorithmic technique to design a switching signal for stabilizing
the corresponding switched system.


title: Semiparametric Cross Entropy for rare-event simulation

abstract:
  The Cross Entropy method is a well-known adaptive importance sampling method
for rare-event probability estimation, which requires estimating an optimal
importance sampling density within a parametric class. In this article we
estimate an optimal importance sampling density within a wider semiparametric
class of distributions. We show that this semiparametric version of the Cross
Entropy method frequently yields efficient estimators. We illustrate the
excellent practical performance of the method with numerical experiments and
show that for the problems we consider it typically outperforms alternative
schemes by orders of magnitude.


title: Heavy vs. light flavor energy loss within a partonic transport model

abstract:
  The full space-time evolution of gluons, light and heavy quarks in
ultra-relativistic heavy-ion collisions is studied within the partonic
transport model Boltzmann Approach to MultiParton Scatterings (BAMPS). We
discuss for light and heavy quarks the elastic and radiative energy loss with a
running coupling. Radiative processes, in particular, are implemented through
an improved version of the Gunion-Bertsch matrix element, which is derived from
comparisons to the exact result, explicitly taking finite heavy quark masses
into account. Subsequently, we present results with and without radiative
processes and compare them to experimental data at LHC. A focus is put on the
nuclear modification factor of charged hadrons and D mesons.


title: Search for R-Parity Violating Supersymmetry at the CMS Experiment

abstract:
  The latest results from CMS on R-Parity violating Supersymmetry based on the
19.5/fb full dataset from the 8 TeV LHC run of 2012 are reviewed. The results
are interpreted in the context of simplified models with multilepton and
b-quark jets signatures that have low missing transverse energy arising from
light top-squark pair with R-parity-violating decays of the lightest
supersymmetric particle. In addition to simplified model, a new approach for
phenomenological MSSM interpretation is shown which demonstrates that the
obtained results from multilepton final states are valid for a wide range of
supersymmetry models.


title: An Infinite self dual Ramsey theorem

abstract:
  In a recent paper \cite{So} S. Solecki proves a finite self dual Ramsey
theorem that in a natural way gives simultaneously the classical finite Ramsey
theorem \cite{Ra} and the Graham-Rothschild theorem \cite{Gr-Ro}. In this paper
we prove the corresponding infinite dimensional self dual theorem, giving
similarly as a consequence the infinite classical Ramsey theorem \cite{Ra} and
the Carlson-Simpson theorem \cite{Ca-Si}.


title:
A canonical partition theorem for uniform families of finite strong
  subtrees

abstract:
  Extending a result of K. Milliken \cite{Mi2}, in this paper we prove a Ramsey
classification result for equivalence relations defined on uniform families of
finite strong subtrees of a finite sequence $(U_i)_{i\in d}$ of fixed trees
$U_i$, $i\in d$, that have a finite uniform branching but are of infinite
length.


title: Flocking algorithm for autonomous flying robots

abstract:
  Animal swarms displaying a variety of typical flocking patterns would not
exist without underlying safe, optimal and stable dynamics of the individuals.
The emergence of these universal patterns can be efficiently reconstructed with
agent-based models. If we want to reproduce these patterns with artificial
systems, such as autonomous aerial robots, agent-based models can also be used
in the control algorithm of the robots. However, finding the proper algorithms
and thus understanding the essential characteristics of the emergent collective
behaviour of robots requires the thorough and realistic modeling of the robot
and the environment as well. In this paper, first, we present an abstract
mathematical model of an autonomous flying robot. The model takes into account
several realistic features, such as time delay and locality of the
communication, inaccuracy of the on-board sensors and inertial effects. We
present two decentralized control algorithms. One is based on a simple
self-propelled flocking model of animal collective motion, the other is a
collective target tracking algorithm. Both algorithms contain a viscous
friction-like term, which aligns the velocities of neighbouring agents parallel
to each other. We show that this term can be essential for reducing the
inherent instabilities of such a noisy and delayed realistic system. We discuss
simulation results about the stability of the control algorithms, and perform
real experiments to show the applicability of the algorithms on a group of
autonomous quadcopters.


title:
Quark mean-field model for single and double $\Lambda$ and $\Xi$
  hypernuclei

abstract:
  The study of hypernuclei in the quark mean-field model are extended from
single-$\Lambda$ hypernuclei to double-$\Lambda$ hypernuclei as well as $\Xi$
hypernuclei (double strangeness nuclei), with a broken SU(3) symmetry for the
quark confinement potential. The strength of the potential for $u,d$ quarks is
constrained by the properties of finite nuclei, while the one for $s$ quark is
fixed by the single $\Lambda$-nucleus potential at the nuclear saturation
density, which has a slightly different value. Compared to our previous work,
we find that the introduction of such symmetry breaking improves efficiently
the description of the single $\Lambda$ energies for a wide range of mass
region, which demonstrates the importance of this effect on the hypernuclei
study. Predictions for double-$\Lambda$ hypernuclei and $\Xi$ hypernuclei are
then made, confronting with a few available experiential double-$\Lambda$
hypernuclei data and other model calculations. The consistency of our results
with the available double-$\Lambda$ hypernucleus is found to be surprisingly
good. Also, there is generally a bound state for $\Xi^0$ hypernuclei with both
light and heavy core nuclei in our model.


title: On the conductor of cohomological transforms

abstract:
  In the analytic study of trace functions of $\ell$-adic sheaves over finite
fields, a crucial issue is to control the conductor of sheaves constructed in
various ways. We consider cohomological transforms on the affine line over a
finite field which have trace functions given by linear operators with an
additive character of a rational function in two variables as a kernel. We
prove that the conductor of such a transform is bounded in terms of the
complexity of the input sheaf and of the rational function defining the kernel,
and discuss applications of this result, including motivating examples arising
from the Polymath8 project.


title: The complete Heyting algebra of subsystems and contextuality

abstract:
  The finite set of subsystems of a finite quantum system with variables in
${\mathbb Z}(n)$, is studied as a Heyting algebra. The physical meaning of the
logical connectives is discussed. It is shown that disjunction of subsystems is
more general concept than superposition. Consequently the quantum probabilities
related to projectors in the subsystems, are incompatible with associativity of
the join in the Heyting algebra, unless if the variables belong to the same
chain. This leads to contextuality, which in the present formalism has as
contexts, the chains in the Heyting algebra. Logical Bell inequalities, which
contain `Heyting factors', are discussed. The formalism is also applied to the
infinite set of all finite quantum systems, which is appropriately enlarged in
order to become a complete Heyting algebra.


title: The open polynomials of the finite topologies

abstract:
  Let T be a topology on the finite set Xn. We consider the open polynomial
associated with the topology T. Its coefficients are the cardinality of open
sets of size j=0,...,n. J. Brown [4] asked when this polynomial has only real
zeros. We prove that this polynomial has real zeros, only in the trivial case
where T is the discrete topology. Then, we weaken Brown's question: for which
topology this polynomial is log-concave, or at least unimodal? A partial answer
is given. Precisely, we prove that if the topology has a large number of open
sets, then its open polynomial is unimodal.


title:
The calculation of expectation values in Gaussian random tensor theory
  via meanders

abstract:
  A difficult problem in the theory of random tensors is to calculate the
expectation values of polynomials in the tensor entries, even in the large N
limit and in a Gaussian distribution. Here we address this issue, focusing on a
family of polynomials labeled by permutations, which naturally generalize the
single-trace invariants of random matrix models. Through Wick's theorem, we
show that the Feynman graph expansion of the expectation values of those
polynomials enumerates meandric systems whose lower arch configuration is
obtained from the upper arch configuration by a permutation on half of the arch
feet. Our main theorem reduces the calculation of expectation values to those
of polynomials labeled by stabilized-interval-free permutations (SIF) which are
proved to enumerate irreducible meandric systems. This together with explicit
calculations of expectation values associated to SIF permutations allows to
exactly evaluate large N expectation values beyond the so-called melonic
polynomials.


title:
Predicting college basketball match outcomes using machine learning
  techniques: some results and lessons learned

abstract:
  Most existing work on predicting NCAAB matches has been developed in a
statistical context. Trusting the capabilities of ML techniques, particularly
classification learners, to uncover the importance of features and learn their
relationships, we evaluated a number of different paradigms on this task. In
this paper, we summarize our work, pointing out that attributes seem to be more
important than models, and that there seems to be an upper limit to predictive
quality.


title: Nucleosynthesis at Finite Temperature and Density

abstract:
  We study the finite temperature and density effects on beta decay rates to
compute their contributions to nucleosynthesis in the early universe and
compact stars. We express nucleosynthesis parameters as a function of
temperature and density in different astronomical systems of interest. It is
explicitly shown that the chemical potential in the core of supermassive and
superdense stars affect beta decay and their helium abundance but the
background contributions is still dependent on relative temperature. We
calculate this contribution for temperature below the chemical potential. It
has been noticed that the acceptable background contribution are obtained for
comparatively larger values of T as temperature plays a role of regulating
parameter in an extremely dense system.


title: Scalable Verification of Markov Decision Processes

abstract:
  Markov decision processes (MDP) are useful to model concurrent process
optimisation problems, but verifying them with numerical methods is often
intractable. Existing approximative approaches do not scale well and are
limited to memoryless schedulers. Here we present the basis of scalable
verification for MDPSs, using an O(1) memory representation of
history-dependent schedulers. We thus facilitate scalable learning techniques
and the use of massively parallel verification.


title: Sign ambiguity in the K Sigma channel

abstract:
  Ambiguities of the signs of $N\to \Sigma K$ coupling constants are studied in
a multichannel partial wave analysis of a large body of pion and photo-induced
reactions. It is shown that the signs are not free from some ambiguities, and
further experimental data are needed. Data on the reactions $\pi^+p\to
\Sigma^+K^+$ and $\gamma p\to K^+\Sigma^0$ define rather well the isospin 3/2
contributions to these channels. However the lack of information on
polarization observables for the reactions $\pi^-p\to \Sigma^0K^0$, $\pi^-p\to
\Sigma^-K^+$ and $\gamma p\to K^0\Sigma^+$ does not allow us to fix uniquely
the signs of $N\to \Sigma K$ coupling constants. As a consequence, also the
contributions of nucleon resonances to these channels remain uncertain.


title:
Assessing Circumbinary Habitable Zones using Latitudinal Energy Balance
  Modelling

abstract:
  Previous attempts to describe circumbinary habitable zones have been
concerned with the spatial extent of the zone, calculated analytically
according to the combined radiation field of both stars. By contrast to these
"spatial HZs", we present a numerical analysis of the "orbital HZ", a habitable
zone defined as a function of planet orbital elements. This orbital HZ is
better equipped to handle (for example) eccentric planet orbits, and is more
directly connected to the data returned by exoplanet observations.
  Producing an orbital HZ requires a large number of climate simulations to be
run to investigate the parameter space - we achieve this using Latitudinal
Energy Balance Models (LEBMs), which handle the insolation of the planet by
both stars (including mutual eclipses), as well as the planetary atmosphere's
ability to absorb, transfer and lose heat.
  We present orbital HZs for several known circumbinary planetary systems:
Kepler-16, Kepler-34, Kepler-35, Kepler-47 and PH-1. Generally, the orbital HZs
at zero eccentricity are consistent with spatial HZs derived by other authors,
although we detect some signatures of variability that coincide with resonances
between the binary and planet orbital periods. We confirm that Earthlike
planets around Kepler-47 with Kepler-47c's orbital parameters could possess
liquid water, despite current uncertainties regarding its eccentricity.
Kepler-16b is found to be outside the habitable zone, as well as the other
circumbinary planets investigated.


title:
Charged Jets in Minimum Bias p-Pb Collisions at sqrt(s) = 5.02 TeV with
  ALICE

abstract:
  Highly energetic jets are sensitive probes for the kinematics and the
topology of nuclear collisions. Jets are produced in an early stage of the
collision from hard-scattered partons, which fragment into a spray of charged
and neutral particles. The measurement of jet spectra in p-Pb collisions
provides an important way to quantify the effects of cold nuclear matter on jet
production, fragmentation and hadronization. This is possible because the hot,
dense medium produced in Pb-Pb collisions is not expected to form. Proton-Lead
collisions also provide an important constraint for the nuclear parton density
functions. The exact evaluation of the background from the underlying event is
an important ingredient to correct the measured jet spectra. The system size in
p-Pb collisions is much smaller than in Pb-Pb so that the methods for
background estimation need to be refined. The analysis reported here is
performed on p-Pb data taken at sqrt(s_NN) = 5.02 TeV by the ALICE detector at
the LHC in the beginning of 2013. The focus of our analysis lies on the minimum
bias charged jet spectra and their comparison to the spectra from pp
collisions. For this analysis various estimates for the background and its
fluctuations have been tested in p-Pb and PYTHIA simulations.


title:
Non-volatile multilevel resistive switching memory cell: A transition
  metal oxide-based circuit

abstract:
  We study the resistive switching (RS) mechanism as way to obtain multi-level
memory cell (MLC) devices. In a MLC more than one bit of information can be
stored in each cell. Here we identify one of the main conceptual difficulties
that prevented the implementation of RS-based MLCs. We present a method to
overcome these difficulties and to implement a 6-bit MLC device with a
manganite-based RS device. This is done by precisely setting the remnant
resistance of the RS-device to an arbitrary value. Our MLC system demonstrates
that transition metal oxide non-volatile memories may compete with the
currently available MLCs.


title: Scaling properties of cosmic (super)string networks

abstract:
  I use a combination of state-of-the-art numerical simulations and analytic
modelling to discuss the scaling properties of cosmic defect networks,
including superstrings. Particular attention is given to the role of extra
degrees of freedom in the evolution of these networks. Compared to the 'plain
vanilla' case of Goto-Nambu strings, three such extensions play important but
distinct roles in the network dynamics: the presence of charges/currents on the
string worldsheet, the existence of junctions, and the possibility of a
hierarchy of string tensions. I also comment on insights gained from studying
simpler defect networks, including Goto-Nambu strings themselves, domain walls
and semilocal strings.


title:
Separation of particles leading to decay and unlimited growth of energy
  in a driven stadium-like billiard

abstract:
  A competition between decay and growth of energy in a time-dependent stadium
billiard is discussed giving emphasis in the decay of energy mechanism. A
critical resonance velocity is identified for causing of separation between
ensembles of high and low energy and a statistical investigation is made using
ensembles of initial conditions both above and below the resonance velocity.
For high initial velocity, Fermi acceleration is inherent in the system.
However for low initial velocity, the resonance allies with stickiness hold the
particles in a regular or quasi-regular regime near the fixed points,
preventing them from exhibiting Fermi acceleration. Also, a transport analysis
along the velocity axis is discussed to quantify the competition of growth and
decay of energy and making use distributions of histograms of frequency, and we
set that the causes of the decay of energy are due to the capture of the orbits
by the resonant fixed points.


title: Charmonium suppression in a baryon rich quark-gluon plasma

abstract:
  We have investigated the charmonium survival probability, in a high baryon
density parton plasma, expected to be produced in nuclear collisions at FAIR.
Charmonia are assumed to undergo complete dissociation by color screening, if
the in-medium Debye radius becomes comparable to the spatial size of the
corresponding bound state. Results indicate a non-trivial dependence of the
suppression pattern on the plasma evolution dynamics. A much larger magnitude
of suppression is foreseen induced by cold nuclear matter compared to that due
to plasma screening.


title: Asteroid spin-axis longitudes from the Lowell Observatory database

abstract:
  By analyzing brightness variation with ecliptic longitude and using the
Lowell Observatory photometric database, we estimate spin-axis longitudes for
more than 350 000 asteroids. Hitherto, spin-axis longitude estimates have been
made for fewer than 200 asteroids. We investigate longitude distributions in
different dynamical groups and asteroid families. We show that asteroid
spin-axis longitudes are not isotropically distributed as previously
considered. We find that the spin-axis longitude distribution for main-belt
asteroids is clearly non-random, with an excess of longitudes from the interval
30{\deg}-110{\deg} and a paucity between 120{\deg}-180{\deg}. The explanation
of the non-isotropic distribution is unknown at this point. Further studies
have to be conducted to determine if the shape of the distribution can be
explained by observational bias, selection effects, a real physical process or
other mechanism.


title:
Waves statistics for generalized one-dimensional Nonlinear Schrodinger
  Equation with saturated nonlinearity

abstract:
  We measure spectra, spatial correlation functions and probability density
functions (PDFs) for waves amplitudes for generalized one-dimensional nonlinear
Schrodinger (NLS) equation of focusing type with saturated nonlinearity. All
additional terms beyond the classical NLS equation are small. As initial
conditions we use perturbed by weak noise modulationally unstable condensate.
On the PDFs we observe power-law region for small and medium amplitudes
followed by intermediate region and then Rayleigh far tail. Power-law region
appears starting from some critical levels of average amplitude and coefficient
related to saturated nonlinearity, and then becomes more pronounced with
average amplitude and saturation coefficient. Correlation of phases becomes
significant for large wave events and contributes about one order of magnitude
to the frequencies of their occurrence. Waves statistics for the considered
systems turns out to be exceptionally stable against additional stochastic
forces.


title:
Modelling the spectra of galaxies at redshift 0.4<z<1.15: the gas
  physical conditions and the element abundances

abstract:
  We revisit the spectra observed by Ramos Almeida et al. (2013) from an
homogeneous sample of galaxies at 0.27<z<1.28 with the aim of finding out the
characteristics of the single objects by consistent modelling. In particular we
investigate the trend of the most significant physical parameters and of the
element abundances with redshift. The observed corrected line ratios cover a
relatively large range. Nevertheless the calculated physical conditions are
similar to those of active galactic nuclei and of starburst galaxies. For some
of the galaxies the dominant photoionizing source is ambiguous. The N/H and O/H
relative abundances are close to the solar ones but show a dip at z=0.7.


title:
Non-universal gaugino mass GUT models in the light of dark matter and
  LHC constraints

abstract:
  We perform a comprehensive study of $SU(5)$, $SO(10)$ and $E(6)$
supersymmetric GUT models where the gaugino masses are generated through the
F-term breaking vacuum expectation values of the non-singlet scalar fields. In
these models the gauginos are non-universal at the GUT scale unlike in the
mSUGRA scenario. We discuss the properties of the LSP which is stable and a
viable candidate for cold dark matter. We look for the GUT scale parameter
space that leads to the the lightest SM like Higgs mass in the range of 122-127
GeV compatible with the observations at ATLAS and CMS, the relic density in the
allowed range of WMAP-PLANCK and compatible with other constraints from
colliders and direct detection experiments. We scan universal scalar ($m_0^G$),
trilinear coupling $A_0$ and $SU(3)_C$ gaugino mass ($M_3^G$) as the
independent free parameters for these models. Based on the gaugino mass ratios
at the GUT scale, we classify 25 SUSY GUT models and find that of these only 13
models satisfy the dark matter and collider constraints. Out of these 13 models
there is only one model where there is a sizeable SUSY contribution to muon
$(g-2)$.


title:
D meson-hadron angular correlations in pp and p-Pb collisions with ALICE
  at the LHC

abstract:
  The comparison of angular correlations between charmed mesons and charged
hadrons produced in pp, p-Pb and Pb-Pb collisions can give insight into charm
quark energy loss mechanisms in hot nuclear medium formed in heavy-ion
collisions and can help to spot possible modifications of charm quark
hadronization induced by the presence of the medium. The analysis of pp and
p-Pb data and the comparison with predictions from pQCD calculations, besides
constituting the necessary baseline for the interpretation of Pb-Pb results,
can provide relevant information on charm production and fragmentation
processes.
  We present a study of azimuthal correlations between D$^0$ and D$^{\ast +}$
mesons and charged hadrons measured by the ALICE experiment in pp collisions at
$\sqrt{s} = 7$ TeV and p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV. D
mesons were reconstructed from their hadronic decays at central rapidity and in
the transverse momentum range $2 < p_{_{\rm T}} < 16$ GeV/$c$, and they were
correlated to charged hadrons reconstructed in the pseudorapidity range $|\eta|
< 0.8$.


title:
Strain-engineering of graphene's electronic structure beyond continuum
  elasticity

abstract:
  We present a new first-order approach to strain-engineering of graphene's
electronic structure where no continuous displacement field $\mathbf{u}(x,y)$
is required. The approach is valid for negligible curvature. The theory is
directly expressed in terms of atomic displacements under mechanical load, such
that one can determine if mechanical strain is varying smoothly at each unit
cell, and the extent to which sublattice symmetry holds. Since strain deforms
lattice vectors at each unit cell, orthogonality between lattice and reciprocal
lattice vectors leads to renormalization of the reciprocal lattice vectors as
well, making the $K$ and $K'$ points shift in opposite directions. From this
observation we conclude that no $K-$dependent gauges enter on a first-order
theory. In this formulation of the theory the deformation potential and
pseudo-magnetic field take discrete values at each graphene unit cell. We
illustrate the formalism by providing strain-generated fields and local density
of electronic states on graphene membranes with large numbers of atoms. The
present method complements and goes beyond the prevalent approach, where strain
engineering in graphene is based upon first-order continuum elasticity.


title:
Enabling Context-awareness by Predicate Detection in Asynchronous
  Pervasive Computing Environments

abstract:
  Pervasive applications are involving more and more autonomous computing and
communicating devices, augmented with the abilities of sensing and controlling
the logical / physical environment. To enable context-awareness for such
applications, we are challenged by the intrinsic asynchrony among the context
collecting devices. To this end, we introduce the predicate detection theory
and propose the Predicate-Detection-based Context-Awareness (PD-CA) framework,
in which: a) logical time is used to explicitly cope with the asynchrony; b)
specification of predicates enables the applications to express contextual
properties of their concerns; c) online and incremental predicate detection
algorithms effectively enable context-awareness at runtime. Under the guidance
of the PD-CA framework, we present the design and implementation of the MIPA
middleware, which shields the applications from the burden of processing the
asynchronous contexts. We also demonstrate how PD-CA simplifies the development
of context-aware applications. Experimental evaluations show the performance of
MIPA in supporting context-aware applications despite of the asynchrony.


title: Phase-space shapes of clusters and rich groups of galaxies

abstract:
  Clusters and groups of galaxies are highly aspherical, with shapes
approximated by nearly prolate ellipsoids of revolution. An equally fundamental
property is the shape of these objects in velocity space which is the
anisotropy of the global velocity dispersion tensor. Here we make use of
kinematical data comprising around 600 nearby clusters and rich groups of
galaxies from the SDSS to place constraints on the phase-space shapes of these
objects, i.e. their shapes in both position and velocity space. We show that
the line of sight velocity dispersion normalised by a mass dependent velocity
scale correlates with the apparent elongation, with circular (elongated)
clusters exhibiting an excessive (decremental) normalised velocity dispersion.
This correlation holds for dynamically young or old clusters and, therefore, it
originates from projecting their intrinsic phase-space shapes rather than from
dynamical evolution. It signifies that clusters are preferentially prolate not
only in position space, but also in velocity space. The distribution of the
axial ratios in position space is found to be well approximated by a Gaussian
with a mean 0.66+/-0.01 and a dispersion 0.07+/-0.008. The velocity ellipsoids
representing the shapes in velocity space are more spherical, with a mean axial
ratio of 0.78+/-0.03. This finding has important implications for mass
measurements based on the line of sight velocity dispersion profiles in
individual clusters. For typical axial ratios of the velocity ellipsoids in the
analysed cluster sample, systematic errors on the mass estimates inferred from
the line of sight velocity dispersions become comparable to statistical
uncertainties for galaxy clusters with as few as 40 spectroscopic redshifts.


title: Asymptotics of neutron Cooper pair in weakly bound nuclei

abstract:
  Asymptotic form of neutron Cooper pair penetrating to the exterior of nuclear
surface is investigated with the Bogoliubov theory for the superfluid Fermions.
Based on a two-particle Schr\"{o}dinger equation governing the Cooper pair wave
function and systematic studies for both weakly bound and stable nuclei, the
Cooper pair is shown to be spatially correlated even in the asymptotic large
distance limit, and the penetration length of the pair condensate is revealed
to be universally governed by the two-neutron separation energy $S_{2n}$ and
the di-neutron mass $2m$.


title: Lattice QCD at the physical point meets SU(2) chiral perturbation theory

abstract:
  We perform a detailed, fully-correlated study of the chiral behavior of the
pion mass and decay constant, based on 2+1 flavor lattice QCD simulations.
These calculations are implemented using tree-level, O(a)-improved Wilson
fermions, at four values of the lattice spacing down to 0.054 fm and all the
way down to below the physical value of the pion mass. They allow a sharp
comparison with the predictions of SU(2) chiral perturbation theory (\chi PT)
and a determination of some of its low energy constants. In particular, we
systematically explore the range of applicability of NLO SU(2) \chi PT in two
different expansions: the first in quark mass (x-expansion), and the second in
pion mass (\xi-expansion). We find that these expansions begin showing signs of
failure around M_\pi=300 MeV for the typical percent-level precision of our
N_f=2+1 lattice results. We further determine the LO low energy constants
(LECs), F=88.0 \pm 1.3\pm 0.3 and B^\msbar(2 GeV)=2.58 \pm 0.07 \pm 0.02 GeV,
and the related quark condensate, \Sigma^\msbar(2 GeV)=(271\pm 4\pm 1 MeV)^3,
as well as the NLO ones, l_3=2.5 \pm 0.5 \pm 0.4 and l_4=3.8 \pm 0.4 \pm 0.2,
with fully controlled uncertainties. We also explore the NNLO expansions and
the values of NNLO LECs. In addition, we show that the lattice results favor
the presence of chiral logarithms. We further demonstrate how the absence of
lattice results with pion masses below 200 MeV can lead to misleading results
and conclusions. Our calculations allow a fully controlled, ab initio
determination of the pion decay constant with a total 1% error, which is in
excellent agreement with experiment.


title:
Transverse momentum distribution of charged particles and identified
  hadrons in p-Pb collisions at the LHC with ALICE

abstract:
  Hadron production has been measured at mid-rapidity by the ALICE experiment
at the LHC in proton-lead (p-Pb) collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV.
The transverse momentum ($p_{\rm T}$) distribution of primary charged particles
and of identified light-flavoured hadrons ($\pi^{\pm}$, K$^{\pm}$, K$^{0}_{\rm
S}$, p, $\bar{\rm p}$, $\Lambda$, $\bar{\Lambda}$) are presented in this
report. Charged-particle tracks are reconstructed in the central barrel over a
wide momentum range. Furthermore they can be identified by exploiting specific
energy loss (d$E$/d$x$), time-of-flight and topological particle-identification
techniques. Particle-production yields, spectral shapes and particle ratios are
measured in several multiplicity classes and are compared with results obtained
in Pb-Pb collisions at the LHC. The measurement of charged-particle transverse
momentum spectra and nuclear modification factor R$_{\rm pPb}$ indicates that
the strong suppression of high-$p_{\rm T}$ hadrons observed in Pb-Pb collisions
is not due to initial-state effects, but it is rather a fingerprint of jet
quenching in hot QCD matter. The systematic study of the hadronic spectral
shapes as a function of the particle mass and of particle ratios as a function
of charged-particle density provides insights into collective phenomena, as
observed in Pb-Pb collisions. Similar features, that could be present in
high-multiplicity p-Pb collisions, will also be discussed.


title: Characteristics of transverse waves in chromospheric mottles

abstract:
  Using data obtained by the high temporal and spatial resolution Rapid
Oscillations in the Solar Atmosphere (ROSA) instrument on the Dunn Solar
Telescope, we investigate at an unprecedented level of detail transverse
oscillations in chromospheric fine structures near the solar disk center. The
oscillations are interpreted in terms of propagating and standing
magnetohydrodynamic kink waves. Wave characteristics including the maximum
transverse velocity amplitude and the phase speed are measured as a function of
distance along the structure's length. Solar magneto-seismology is applied to
these measured parameters to obtain diagnostic information on key plasma
parameters (e.g., magnetic field, density, temperature, flow speed) of these
localised waveguides. The magnetic field strength of the mottle along the
$\sim$2 Mm length is found to decrease by a factor of 12, while the local
plasma density scale height is $\sim280\pm$80 km.


title:
Tritium and helium analyses in thin films by enhanced proton
  backscattering

abstract:
  In order to perform quantitative tritium and helium analysis in thin film
sample by using enhanced proton backscattering (EPBS), EPBS spectra for several
samples consisting of non-RBS light elements (i.e., T, 4He, 12C, 16O, natSi),
medium and heavy elements have been measured and analyzed by using analytical
SIMNRA and Monte Carlo-based CORTEO codes. The CORTEO code used in this paper
is modified and some non-RBS cross sections of proton scattering from T, 4He,
12C, 14N, 16O and natSi elements taken from ENDF/B-VII.1 database and the
calculations of SigmaCalc code are incorporated. All cross section data needed
in CORTEO code over the entire proton incident energy-scattering angle plane
are obtained by interpolation. It is quantitatively observed that the multiple
and plural scattering effects have little impact on energy spectra for light
elements like T, He, C, O and Si, and the RBS cross sections of light elements,
instead of the non-RBS cross sections, can be used in SIMNRA code for dual
scattering calculations for EPBS analysis. It is also observed that at the low
energy part of energy spectrum the results given by CORTEO code are higher than
the results of SIMNRA code and are in better agreement with the experimental
data, especially when heavier elements exist in samples. For tritium analysis,
the tritium depth distributions should not be simply adjusted to fit the
experimental spectra when the multiple and plural scattering contributions are
not completely accounted, or else inaccurate results may be obtained. For
medium and heavy matrix elements, when full Monte Carlo RBS calculations are
used in CORTEO code, the results from CORTEO code are in good agreement with
the experimental results at the low energy part of energy spectra, at this
moment quantitative tritium and helium analysis in thin film sample by using
enhanced proton backscattering can be performed reliably.


title:
Ultra-narrow and widely tunable Mn^(2+) Emission from Single
  Nanocrystals of ZnS-CdS alloy

abstract:
  Extensively studied Mn-doped semiconductor nanocrystals have invariably
exhibited photoluminescence (PL) over a narrow energy window of width <= 149
meV in the orange-red region and a surprisingly large spectral width (>= 180
meV), contrary to its presumed atomic-like origin. Carrying out emission
measurements on individual single nanocrystals and supported by ab initio
calculations, we show that Mn PL emission, in fact, can (i) vary over a much
wider range (~ 370 meV) covering the deep green-deep red region and (ii)
exhibit widths substantially lower (~ 60-75 meV) than reported so far, opening
newer application possibilities and requiring a fundamental shift in our
perception of the emission from Mn-doped semiconductor nanocrystals.


title:
A prescription and fast code for the long-term evolution of star
  clusters - II. Unbalanced and core evolution

abstract:
  We introduce version two of the fast star cluster evolution code Evolve Me A
Cluster of StarS (EMACSS). The first version (Alexander & Gieles) assumed that
cluster evolution is balanced for the majority of the life-cycle, meaning that
the rate of energy generation in the core of the cluster equals the diffusion
rate of energy by two-body relaxation, which makes the code suitable for
modelling clusters in weak tidal fields. In this new version we extend the
model to include an unbalanced phase of evolution to describe the pre-collapse
evolution and the accompanying escape rate such that clusters in strong tidal
fields can also be modelled. We also add a prescription for the evolution of
the core radius and density and a related cluster concentration parameter. The
model simultaneously solves a series of first-order ordinary differential
equations for the rate of change of the core radius, half-mass radius and the
number of member stars N. About two thousand integration steps in time are
required to solve for the entire evolution of a star cluster and this number is
approximately independent of N. We compare the model to the variation of these
parameters following from a series of direct N-body calculations of single-mass
clusters and find good agreement in the evolution of all parameters. Relevant
time-scales, such as the total lifetimes and core collapse times, are
reproduced with an accuracy of about 10% for clusters with various initial
half-mass radii (relative to their Jacobi radii) and a range of different
initial N up to N = 65536. We intend to extend this framework to include more
realistic initial conditions, such as a stellar mass spectrum and mass loss
from stars. The EMACSS code can be used in star cluster population studies and
in models that consider the co-evolution of (globular) star clusters and large
scale structures.


title: Compact (A)dS Boson Stars and Shells

abstract:
  We present compact Q-balls in an (Anti-)de Sitter background in D dimensions,
obtained with a V-shaped potential of the scalar field. Beyond critical values
of the cosmological constant compact Q-shells arise. By including the
gravitational back-reaction, we obtain boson stars and boson shells with
(Anti-)de Sitter asymptotics. We analyze the physical properties of these
solutions and determine their domain of existence. In four dimensions we
address some astrophysical aspects.


title: Localized and complete resonance in plasmonic structures

abstract:
  This paper studies a possible connection between the way the time averaged
electromagnetic power dissipated into heat blows up and the anomalous localized
resonance in plasmonic structures. We show that there is a setting in which the
localized resonance takes place whenever the resonance does and moreover, the
power is always bounded and might go to $0$. We also provide another setting in
which the resonance is complete and the power goes to infinity whenever
resonance occurs; as a consequence of this fact there is no localized
resonance. This work is motivated from recent works on cloaking via anomalous
localized resonance.


title:
Discovering extra Higgs boson via pair production of the SM-like Higgs
  bosons

abstract:
  In the standard model (SM), pair production rate of Higgs boson at the Large
Hadron Collider (LHC) is quite low. One usually think that it is extremely
important for the measurement of triple Higgs coupling at the high luminosity
LHC. In this paper, we propose to search for the extra Higgs boson (denoted as
$S$) utilizing pair production of the SM-like Higgs boson ($H$) which was
discovered in July, 2012.The pair production of $H$ can be huge due to the
resonant production of heavy scalar $S$, namely $PP \rightarrow S \rightarrow
HH$. The couplings of $H$ with weak gauge boson are similar to ones in the SM
and it implies that the couplings between $S$ and gauge bosons are likely
suppressed. Provided that $S$ is heavy enough, the decay into weak gauge bosons
may not be the dominant modes. Instead $S$ can decay into a pair of $H$ and
offer the promising channel to discover it. In this paper, we studied the 5
promising decay modes of $H$, i.e. $b\bar{b}$, $WW^*$, $ZZ^*$, $\gamma\gamma$
and $\tau^+\tau^-$, and simulated the signals and backgrounds for the 15
combination modes for $HH$ at the LHC with $\sqrt{s}= 14$ TeV and integrated
luminosity $\mathcal{L}=1000fb^{-1}$. We found that with the help of suitable
selection rules, very good signal to background ratio $S/B$ can be archived in
many decay channels, for example $b\bar b+ (WW^*, ZZ^*, \gamma\gamma,
\tau^+\tau^-)$, $WW^*+(WW^*, ZZ^*, \gamma\gamma, \tau^+\tau^-)$ and
$\tau^+\tau^- +(\gamma\gamma, \tau^+\tau^-)$. For the detailed results please
refer to Table \ref{tab:discovery} in the text. On the contrary, $b\bar b b\bar
b$ mode is less important due to the huge QCD background. However if one has
excellent control on light jet mis-tagging, the $b\bar b b\bar b$ mode can be
promising to discover the extra Higgs boson due to its the largest branching
ratio compared to other modes.


title: Differential inequalities and quasi-normal families

abstract:
  We show that a family ${\cal F}$ of meromorphic functions in a domain $D$
satisfying $$\frac{|f^{(k)}|}{1+|f^{(j)}|^\alpha}(z)\ge C \qquad \mbox{for all}
z\in D \mbox{and all} f\in {\cal F}$$ (where $k$ and $j$ are integers with
$k>j\ge 0$ and $C>0$, $\alpha>1$ are real numbers) is quasi-normal.
Furthermore, if all functions in ${\cal F}$ are holomorphic, the order of
quasi-normality of ${\cal F}$ is at most $j-1$. The proof relies on the Zalcman
rescaling method and previous results on differential inequalities constituting
normality.


title: A note on injective envelopes and von Neumann algebras

abstract:
  The article exhibits certain relations between the injective envelope I(A) of
a C*-algebra A and the von Neumann algebra generated by a representation lambda
of A provided it is injective. More specifically we show that there exist
positive retractions sigma : /lambda (A)'' ---> I(A) which are close to being
*-homomorphisms in the sense that they are Jordan homomorphisms of the
underlying Jordan algebras, and the kernel of /sigma is given by a twosided
ideal.


title:
Watchdog-LEACH: A new method based on LEACH protocol to Secure Clustered
  Wireless Sensor Networks

abstract:
  Wireless sensor network comprises of small sensor nodes with limited
resources. Clustered networks have been proposed in many researches to reduce
the power consumption in sensor networks. LEACH is one of the most interested
techniques that offer an efficient way to minimize the power consumption in
sensor networks. However, due to the characteristics of restricted resources
and operation in a hostile environment, WSNs are subjected to numerous threats
and are vulnerable to attacks. This research proposes a solution that can be
applied on LEACH to increase the level of security. In Watchdog-LEACH, some
nodes are considered as watchdogs and some changes are applied on LEACH
protocol for intrusion detection. Watchdog-LEACH is able to protect against a
wide range of attacks and it provides security, energy efficiency and memory
efficiency. The result of simulation shows that in comparison to LEACH, the
energy overhead is about 2% so this method is practical and can be applied to
WSNs.


title:
Resonant interactions between a Mollow triplet sideband of a quantum dot
  and a strongly coupled cavity

abstract:
  We experimentally demonstrate that the Mollow triplet sidebands of a quantum
dot strongly coupled to a cavity exhibit anomalous power induced broadening and
enhanced emission when one sideband is tuned over the cavity frequency. We
observe a nonlinear increase of the sideband linewidth with excitation power
when the Rabi frequency exceeds the detuning between the quantum dot and the
cavity, consistent with a recent theoretical model that accounts for acoustic
phonon-induced processes between the exciton and the cavity. In addition, the
sideband tuned to the cavity shows strong resonant emission enhancement.


title: Flux Phase as a Possible Ordered State in t-J Model

abstract:
  In high-Tc cuprate superconductors, violation of time-reversal symmetry
(${\cal T}$) has been observed experimentally. In order to explain this
phenomenon, we consider a flux phase in the t-J model. The flux phase has a
free energy higher than that of a superconducting (SC) state, but it may occur
near a [110] surface of a $d_{x^2-y^2}$-wave superconductor where the SC order
is strongly suppressed. In this case the system would break ${\cal T}$ locally
near the surface. In this short note we estimate the bare transition
temperature of the flux phase, $T_{FL}$, assuming the absence of the SC state.
It is found that $T_{FL}$ is finite for rather large doping rate $\delta$
($\delta \lesssim 0.15$) if the shape of Fermi surface of the system is
favorable to this state.


title:
Anisotropic and long-range vortex interactions in two-dimensional
  dipolar Bose gases

abstract:
  We perform a theoretical study into how dipole-dipole interactions modify the
properties of superfluid vortices within the context of a two-dimensional
atomic Bose gas of co-oriented dipoles. The reduced density at a vortex acts
like a giant anti-dipole, changing the density profile and generating an
effective dipolar potential centred at the vortex core whose most slowly
decaying terms go as $1/\rho^2$ and $\ln(\rho)/\rho^3$. These effects modify
the vortex-vortex interaction which, in particular, becomes anisotropic for
dipoles polarized in the plane. Striking modifications to vortex-vortex
dynamics are demonstrated, i.e. anisotropic co-rotation dynamics and the
suppression of vortex annihilation.


title: Quantum theory of multimode polariton condensation

abstract:
  We develop a theory for the dynamics of the density matrix describing a
multimode polariton condensate. In such a condensate several single-particle
orbitals become highly occupied, due to stimulated scattering from reservoirs
of high-energy excitons. A generic few-parameter model for the system leads to
a Lindblad equation which includes saturable pumping, decay, and condensate
interactions. We show how this theory can be used to obtain the population
distributions, and the time-dependent first- and second-order coherence
functions, in such a multimode condensate. As a specific application, we
consider a polaritonic Josephson junction, formed from a double-well potential.
We obtain the population distributions, emission line shapes, and widths
(first-order coherence functions), and predict the dephasing time of the
Josephson oscillations.


title:
High-speed photometry of faint cataclysmic variables - VIII. Targets
  from the Catalina Real-time Transient Survey

abstract:
  Time series photometry of 20 Cataclysmic Variables detected by the Catalina
Real-time Transient Survey is presented. 14 of these systems have not been
observed previously and only two have been examined in-depth. From the
observations we determined 12 new orbital periods and independently found a
further two. Eight of the CVs are eclipsing systems, five of which have eclipse
depths of more than 0.9 mag. Included in the sample are six SU UMa systems
(three of which show superhumps in our photometry), a polar (SSS1944-42) and
one system (CSS1417-18) that displays an abnormally fast decline from outburst.


title:
Neutron matter with chiral EFT interactions: Perturbative and first QMC
  calculations

abstract:
  Neutron matter presents a unique system in chiral effective field theory
(EFT), because all many-body forces among neutrons are predicted to
next-to-next-to-next-to-leading order (N3LO). We discuss perturbative and first
Quantum Monte Carlo (QMC) calculations of neutron matter with chiral EFT
interactions and their astrophysical impact for the equation of state and
neutron stars.


title: SANC system and its applications for LHC

abstract:
  The {\tt SANC} computer system is aimed at support of analytic and numeric
calculations for experiments at colliders. The system is reviewed briefly.
Recent results on high-precision description of the Drell-Yan processes at the
LHC are presented. Special attention is paid to the evaluation of higher order
final-state QED corrections to the single $W$ and $Z$ boson production
processes. A new Monte Carlo integrator {\tt mcsanc} suited for description of
a series of high-energy physics processes at the one-loop precision level is
presented.


title:
Thermoelectric signatures of a Majorana bound state coupled to a quantum
  dot

abstract:
  We theoretically investigate the possibility to use thermolectric
measurements to detect Majorana bound states and to investigate their coupling
to a dissipative environment. The particle-hole symmetry of Majorana states
would normally lead to a vanishing Seebeck coefficient, i.e., a vanishing
open-circuit voltage resulting from a temperature gradient. We discuss how
coupling to a quantum dot with a gate-controlled energy level breaks
particle-hole symmetry in a tunable manner. The resulting gate-dependent
Seebeck coefficient provides a new way to evidence the existence of Majorana
states, which can be combined with conventional tunnel spectroscopy in the same
setup. Furthermore, the thermoelectric properties rely on the ability of the
quantum dot-Majorana system to sense the temperature of the bulk superconductor
and can be used to extract information about the dissipative decay of Majorana
states, which is crucial for quantum information applications.


title: A topology for limits of Markov chains

abstract:
  In the investigation of limits of Markov chains, the presence of states which
become instantaneous states in the limit may prevent the convergence of the
chain in the Skorohod topology. We present in this article a weaker topology
adapted to handle this situation. We use this topology to derive the limit of
random walks among random traps and sticky zero-range processes.


title: Endo-trivial modules for finite groups with Klein-four Sylow 2-subgroups

abstract:
  We study the finitely generated abelian group $T(G)$ of endo-trivial
$kG$-modules where $kG$ is the group algebra of a finite group $G$ over a field
of characteristic $p>0$. When the representation type of the group algebra is
not wild, the group structure of $T(G)$ is known for the cases where a Sylow
$p$-subgroup $P$ of $G$ is cyclic, semi-dihedral and generalized quaternion. We
investigate $T(G)$, and more accurately, its torsion subgroup $TT(G)$ for the
case where $P$ is a Klein-four group. More precisely, we give a necessary and
sufficient condition in terms of the centralizers of involutions under which
$TT(G) = f^{-1}(X(N_{G}(P)))$ holds, where $f^{-1}(X(N_{G}(P)))$ denotes the
abelian group consisting of the $kG$-Green correspondents of the
one-dimensional $kN_{G}(P)$-modules. We show that the lift to characteristic
zero of any indecomposable module in $TT(G)$ affords an irreducible ordinary
character. Furthermore, we show that the property of a module in
$f^{-1}(X(N_{G}(P)))$ of being endo-trivial is not intrinsic to the module
itself but is decided at the level of the block to which it belongs.


title:
Fitting density models to observational data - The local Schmidt law in
  molecular clouds

abstract:
  We consider the general problem of fitting a parametric density model to
discrete observations, taken to follow a non-homogeneous Poisson point process.
This class of models is very common, and can be used to describe many
astrophysical processes, including the distribution of protostars in molecular
clouds. We give the expression for the likelihood of a given spatial density
distribution of protostars and apply it to infer the most probable dependence
of the protostellar surface density on the gas surface density. Finally, we
apply this general technique to model the distribution of protostars in the
Orion molecular cloud and robustly derive the local star formation scaling
(Schmidt) law for a molecular cloud. We find that in this cloud the
protostellar surface density, $\Sigma_\mathrm{YSO}$, is directly proportional
to the square gas column density, here expressed as infrared extinction in the
$K$-band, $A_K$: more precisely, $\Sigma_\mathrm{YSO} = (1.65 \pm 0.19)
A_K^{(2.03 \pm 0.15)}$ stars pc$^{-2}$.


title:
Second order limit laws for occupation times of the fractional Brownian
  motion

abstract:
  We prove second order limit laws for (additive) functionals of the
$d$-dimensional fractional Brownian motion with Hurst index $H=\frac{1}{d}$,
using the method of moments, extending the Kallianpur-Robbins law.


title: Queues and risk processes with dependencies

abstract:
  We study the generalization of the G/G/1 queue obtained by relaxing the
assumption of independence between inter-arrival times and service
requirements. The analysis is carried out for the class of multivariate matrix
exponential distributions introduced in [12]. In this setting, we obtain the
steady state waiting time distribution and we show that the classical relation
between the steady state waiting time and the workload distributions re- mains
valid when the independence assumption is relaxed. We also prove duality
results with the ruin functions in an ordinary and a delayed ruin process.
These extend several known dualities between queueing and risk models in the
independent case. Finally we show that there exist stochastic order relations
between the waiting times under various instances of correlation.


title: Chemistry of Dark Clouds: Databases, Networks, and Models

abstract:
  Chemical models have been developed over the years by astrophysicists to
study the pro- cesses at play in the various environments of the interstellar
medium (ISM) that define the chemical composition of the gas and the dust.
These qualitative aspects of the model predictions have been improved from a
chemical point of view thanks to many recent developments of the experimental
technics and theoretical methods that aim at studying the individual reactions
in conditions as close to the ISM conditions as possible and characterize the
rate constants of their efficiency. These models have also been more and more
associated with dynamical evolution of the ISM physical conditions (for star
forming regions for instance) since the chemical composition is far from
steady-state in such regions. In this paper, we try to assess the state of the
art concerning the chemical modeling of dark clouds, the initial step for the
formation of stars and disks.


title:
Tracking Serendipitous Interactions: How Individual Cultures Shape the
  Office

abstract:
  In many work environments, serendipitous interactions between members of
different groups may lead to enhanced productivity, collaboration and knowledge
dissemination. Two factors that may have an influence on such interactions are
cultural differences between individuals in highly multicultural workplaces,
and the layout and physical spaces of the workplace itself. In this work, we
investigate how these two factors may facilitate or hinder inter-group
interactions in the workplace. We analyze traces collected using wearable
electronic badges to capture face-to-face interactions and mobility patterns of
employees in a research laboratory in the UK. We observe that those who
interact with people of different roles tend to come from collectivist cultures
that value relationships and where people tend to be comfortable with social
hierarchies, and that some locations in particular are more likely to host
serendipitous interactions, knowledge that could be used by organizations to
enhance communication and productivity.


title: A Note on Seiberg Duality and Chiral Symmetry Breaking

abstract:
  Following arXiv:1310.2027 and arXiv:0801.0762, we consider a
non-supersymmetric Seiberg duality between electric and magnetic "orientifold
field theories". These theories live on brane configurations of type 0' string
theory. In the electric theory side the scalars acquire a mass and decouple,
resulting in an SU(Nc) gauge theory coupled to Nf massless quarks and an
additional massless fermion that transforms in the two-index antisymmetric
representation. In the magnetic theory side there exists a fundamental meson
field that develops a Coleman-Weinberg potential. At the one-loop approximation
the potential admits a minimum with chiral symmetry breaking of the form
SU(Nf)L x SU(Nf)R --> SU(Nf)V and an additional breaking of an axial U(1)
symmetry. The resulting theory admits a spectrum whose massless degrees of
freedom are Nf^2 Nambu-Goldstone bosons.


title:
Discontinuities in the First and Second Sound Velocities at the
  Berezinskii-Kosterlitz-Thouless Transition

abstract:
  We calculate the temperature dependence of the first and second sound
velocities in the superfluid phase of a 2D dilute Bose gas by solving Landau's
two fluid hydrodynamic equations. We predict the occurrence of a significant
discontinuity in both velocities at the critical temperature, as a consequence
of the jump of the superfluid density characterizing the
Berezinskii-Kosterlitz-Thouless transition. The key role of the thermal
expansion coefficient is discussed. We find that second sound in this dilute
Bose gas can be easily excited through a density perturbation, thereby, making
the perspective of the measurement of the superfluid density particularly
favorable.


title: Mode Coupling of Phonons in a Dense One-Dimensional Microfluidic Crystal

abstract:
  Long-living coupled transverse and longitudinal phonon modes are explored in
dense and regular arrangements of flat microfluidic droplets. The collective
oscillations are driven by hydrodynamic interactions between the confined
droplets and can be excited in a controlled way. Experimental results are
quantitatively compared to simulation results obtained by multi-particle
collision dynamics. The observed transverse modes are acoustic phonons and can
be described by a linearized far-field theory, whereas the longitudinal modes
arise from a non-linear mode coupling due to the lateral variation of the flow
field under confinement.


title: Weak bisimulation for coalgebras over order enriched monads

abstract:
  The paper introduces the notion of a weak bisimulation for coalgebras whose
type is a monad satisfying some extra properties. In the first part of the
paper we argue that systems with silent moves should be modelled
coalgebraically as coalgebras whose type is a monad. We show that the visible
and invisible part of the functor can be handled internally inside a monadic
structure. In the second part we introduce the notion of an ordered saturation
monad, study its properties, and show that it allows us to present two
approaches towards defining weak bisimulation for coalgebras and compare them.
We support the framework presented in this paper by two main examples of
models: labelled transition systems and simple Segala systems.


title: Status of the Exclusive MSSM Higgs production at LHC after the Run I

abstract:
  We investigate the prospects for Central Exclusive Diffractive (CED)
production of MSSM Higgs bosons at the LHC using forward proton detectors (FPD)
proposed to be installed 220 m and 420 m from ATLAS and CMS detectors. We
summarize the situation after the first and very successful data taking period
of the LHC. The discovery of a Higgs boson and results from searches for
additional MSSM Higgs bosons from the ATLAS and CMS, have recently led to a
proposal of new low-energy MSSM benchmark scenarios. The CED signal cross
section for the process H -> bb and its backgrounds are estimated in these new
scenarios. We also comment on the experimental procedure if the proposed FPDs
are to be used to measure the CED signal.


title: Parabolic equations with rough data

abstract:
  We survey recent work on local well-posedness results for parabolic equations
and systems with rough initial data.


title:
Bilinear dispersive estimates via space-time resonances, part II:
  dimensions 2 and 3

abstract:
  Consider a bilinear interaction between two linear dispersive waves with a
generic resonant structure (roughly speaking, space and time resonant sets
intersect transversally). We derive an asymptotic equivalent of the solution
for data in the Schwartz class, and bilinear dispersive estimates for data in
weighted Lebesgue spaces. An application to water waves with infinite depth,
gravity and surface tension is also presented.