title:
Constraints on the Neutron Star and Inner Accretion Flow in Serpens X-1
  Using NuSTAR

abstract:
  We report on an observation of the neutron star low-mass X-ray binary Serpens
X-1, made with NuSTAR. The extraordinary sensitivity afforded by NuSTAR
facilitated the detection of a clear, robust, relativistic Fe K emission line
from the inner disk. A relativistic profile is required over a single Gaussian
line from any charge state of Fe at the 5-sigma level of confidence, and any
two Gaussians of equal width at the same confidence. The Compton
back-scattering "hump" peaking in the 10-20 keV band is detected for the first
time in a neutron star X-ray binary. Fits with relativistically-blurred disk
reflection models suggest that the disk likely extends close to the innermost
stable circular orbit (ISCO) or stellar surface. The best-fit blurred
reflection models constrain the gravitational redshift from the stellar surface
to be z > 0.16. The data are broadly compatible with the disk extending to the
ISCO; in that case, z > 0.22 and R < 12.6 km (assuming M = 1.4 Msun and a=0,
where a = cJ/GM^2). If the star is as large or larger than its ISCO, or if the
effective reflecting disk leaks across the ISCO to the surface, the redshift
constraints become measurements. We discuss our results in the context of
efforts to measure fundamental properties of neutron stars, and models for
accretion onto compact objects.


title: Exploring Scientists' Working Timetable: A Global Survey

abstract:
  In our previous study (Wang et al., 2012), we analyzed scientists' working
timetable of 3 countries, using realtime downloading data of scientific
literatures. In this paper, we make a through analysis about global scientists'
working habits. Top 30 countries/territories from Europe, Asia, Australia,
North America, Latin America and Africa are selected as representatives and
analyzed in detail. Regional differences for scientists' working habits exists
in different countries. Besides different working cultures, social factors
could affect scientists' research activities and working patterns.
Nevertheless, a common conclusion is that scientists today are often working
overtime. Although scientists may feel engaged and fulfilled about their hard
working, working too much still warns us to reconsider the work - life balance.


title:
Interplay between single-stranded binding proteins on RNA secondary
  structure

abstract:
  RNA protein interactions control the fate of cellular RNAs and play an
important role in gene regulation. An interdependency between such interactions
allows for the implementation of logic functions in gene regulation. We
investigate the interplay between RNA binding partners in the context of the
statistical physics of RNA secondary structure, and define a linear correlation
function between the two partners as a measurement of the interdependency of
their binding events. We demonstrate the emergence of a long-range power-law
behavior of this linear correlation function. This suggests RNA secondary
structure driven interdependency between binding sites as a general mechanism
for combinatorial post-transcriptional gene regulation.


title: A Characterisation of Weak Integer Additive Set-Indexers of Graphs

abstract:
  An integer additive set-indexer is defined as an injective function
$f:V(G)\rightarrow 2^{\mathbb{N}_0}$ such that the induced function $g_f:E(G)
\rightarrow 2^{\mathbb{N}_0}$ defined by $g_f (uv) = f(u)+ f(v)$ is also
injective. An integer additive set-indexer is said to be $k$-uniform if
$|g_f(e)| = k$ for all $e\in E(G)$. An integer additive set-indexer $f$ is said
to be a weak integer additive set-indexer if $|g_f(uv)|=max(|f(u)|,|f(v)|)$ for
all $u,v\in V(G)$. In this paper, we study the characteristics of certain
graphs and graph classes which admit weak integer additive set-indexers.


title:
Does the Helmholtz theorem of vector decomposition apply to the wave
  fields of electromagnetic radiation?

abstract:
  The derivation of the Helmholtz theorem of vector decomposition of a 3-vector
field requires that the field satisfy certain convergence properties at spatial
infinity. This paper investigates if time-dependent electromagnetic radiation
wave fields, which are of long range, satisfy these requirements. It is found
that the requirements are satisfied because the fields give rise to integrals
over the radial distance r of integrands of the form sin(kr)/r and cos(kr)/r.
These Dirichlet integrals converge at infinity as required.


title:
RANSAC: Identification of Higher-Order Geometric Features and
  Applications in Humanoid Robot Soccer

abstract:
  The ability for an autonomous agent to self-localise is directly proportional
to the accuracy and precision with which it can perceive salient features
within its local environment. The identification of such features by
recognising geometric profile allows robustness against lighting variations,
which is necessary in most industrial robotics applications. This paper details
a framework by which the random sample consensus (RANSAC) algorithm, often
applied to parameter fitting in linear models, can be extended to identify
higher-order geometric features. Goalpost identification within humanoid robot
soccer is investigated as an application, with the developed system yielding an
order-of-magnitude improvement in classification performance relative to a
traditional histogramming methodology.


title: A global Torelli theorem for rigid hyperholomorphic sheaves

abstract:
  We prove a global Torelli theorem for the moduli space of marked triples
(X,m,A), consisting of an irreducible holomorphic symplectic manifold X, a
marking m of its second integral cohomology, and a stable and rigid sheaf A of
Azumaya algebras on the cartesian product X^d, d>0, such that the second Chern
class of A is invariant under a finite index subgroup of the monodromy group of
X. The main example involves the rank 2n-2 sheaf over the cartesian square of
holomorphic symplectic manifolds of K3[n]-type considered in the work of the
first author arXiv:1105.3223. The result will be used in the authors
forthcoming work on generalized deformations of K3 surfaces.


title: Supernova Early Warning in Daya Bay Reactor Neutrino Experiment

abstract:
  Providing an early warning of a galactic supernova using neutrino signals is
of importance in studying both supernova dynamics and neutrino physics. The
Daya Bay reactor neutrino experiment, with a unique feature of multiple liquid
scintillator detectors separated in space, is sensitive to the full energy
spectrum of supernova burst electron-antineutrinos. By deploying 8 Antineutrino
Detectors (ADs) in three different experimental halls, we obtain a more
powerful and prompt rejection of muon spallation background than
single-detector experiments. A dedicated supernova online trigger system
embedded in the data acquisition system has been installed to allow the
detection of a coincidence of neutrino signals within a 10-second window, thus
providing a robust early warning of a supernova occurrence within the Milky
Way.


title: Asymptotically periodic piecewise contractions of the interval

abstract:
  We consider the iterates of a generic injective piecewise contraction of the
interval defined by a finite family of contractions. Let $\phi_i:[0,1]\to
(0,1)$, $1\le i\le n$, be $C^2$-diffeomorphisms with $\sup_{x\in (0,1)} \vert
D\phi_i(x)\vert<1$ whose images $\phi_1([0,1]), \ldots, \phi_n([0,1])$ are
pairwise disjoint. Let $0<x_1<\cdots<x_{n-1}<1$ and let $I_1,\ldots, I_n$ be a
partition of the interval $[0,1)$ into subintervals $I_i$ having interior
$(x_{i-1},x_i)$, where $x_0=0$ and $x_n=1$. Let $f_{x_1,\ldots,x_{n-1}}$ be the
map given by $x\mapsto \phi_i(x)$ if $x\in I_i$, for $1\le i\le n$. Among other
results we prove that for Lebesgue almost every $(x_1,\ldots,x_{n-1})$, the
piecewise contraction $f_{x_1,\ldots,x_{n-1}}$ is asymptotically periodic.


title:
Production and decay rates of excited leptons in a left-right symmetric
  scenario

abstract:
  We merge two leading Beyond Standard Model scenarios, namely compositeness
and left-right symmetry, and probe the resulting collider signatures in the
leptonic case. The constraints on composite models for fermions leave open the
possibility of vector like excitations of Standard Model (SM) fermions. Here we
consider the possibility of low scale left-right gauge symmetry $SU(2)_{R}
\times SU(2)_{L} \times U(1)_ {B-L}$, with the simplifying assumption that the
right like excited sector of fermions is significantly heavier than the
excitations of the left chiral fermions. It is found that the right handed
currents still contribute to observable processes, and alter the existing
bounds on the scale of compositeness. The cross section times branching ratio
of the photon decay channel is strongly depressed, bringing down the exclusion
limit of the mass of excited electrons from about 2 TeV to below 1 TeV. On the
other hand, cross section times branching ratio of the Z decay channel is
significantly enhanced and remains greater than that of the photon channel. We
thus propose analyzing the Z decay channel in existing collider data in order
to search for signature of left-right symmetry as well as excited leptons with
masses above 1 TeV.


title: Contracting Graphs to Split Graphs and Threshold Graphs

abstract:
  We study the parameterized complexity of Split Contraction and Threshold
Contraction. In these problems we are given a graph G and an integer k and
asked whether G can be modified into a split graph or a threshold graph,
respectively, by contracting at most k edges. We present an FPT algorithm for
Split Contraction, and prove that Threshold Contraction on split graphs, i.e.,
contracting an input split graph to a threshold graph, is FPT when
parameterized by the number of contractions. To give a complete picture, we
show that these two problems admit no polynomial kernels unless NP\subseteq
coNP/poly.


title:
Compactness of commutators of bilinear maximal Calder\'{o}n-Zygmund
  singular integral operators

abstract:
  Let $T$ be a bilinear Calder\'{o}n-Zygmund singular integral operator and
$T_*$ be its corresponding truncated maximal operator. The commutators in the
$i$-$th$ entry and the iterated commutators of $T_*$ are defined by $$
T_{\ast,b,1}(f,g)(x)=\sup_{\delta>0}\bigg|\iint_{|x-y|+|x-z|>\delta}K(x,y,z)(b(y)-b(x))f(y)g(z)dydz\bigg|,
$$
$$T_{\ast,b,2}(f,g)(x)=\sup_{\delta>0}\bigg|\iint_{|x-y|+|x-z|>\delta}K(x,y,z)(b(z)-b(x))f(y)g(z)dydz\bigg|,$$
\begin{align*}
T_{\ast,(b_1,b_2)}(f,g)(x)=\sup\limits_{\delta>0}\bigg|\iint_{|x-y|+|x-z|>\delta}
K(x,y,z)(b_1(y)-b_1(x))(b_2(z)-b_2(x))f(y)g(z)dydz\bigg|. \end{align*} In this
paper, the compactness of the commutators $T_{\ast,b,1}$, $T_{\ast,b,2}$ and
$T_{\ast,(b_1,b_2)}$ on $L^r(\mathbb{R}^n))$ is established.


title:
Forbidden minors for graphs with no first obstruction to parametric
  Feynman integration

abstract:
  We give a characterization of 3-connected graphs which are planar and forbid
cube, octahedron, and $H$ minors, where $H$ is the graph which is one
$\Delta-Y$ away from each of the cube and the octahedron. Next we say a graph
is Feynman 5-split if no choice of edge ordering gives an obstruction to
parametric Feynman integration at the fifth step. The 3-connected Feynman
5-split graphs turn out to be precisely those characterized above. Finally we
derive the full list of forbidden minors for Feynman 5-split graphs of any
connectivity.


title:
The Linear Sigma Model and the formation of a charged pion condensate in
  the presence of an external magnetic field

abstract:
  We discuss the charged pion condensation phenomenon in the linear sigma
model, in the presence of an external uniform magnetic field. The critical
temperature is obtained as a function of the external magnetic field, assuming
the transition is of second order, by considering a dilute gas at low
temperature. As a result we found magnetic anti-catalysis in the Bose-Einstein
condensation for lower values of the external magnetic field, and catalysis for
higher values of the external magnetic field. This behavior confirms previous
results with a single charged scalar field.


title:
Global Solar Free Magnetic Energy and Electric Current Density
  Distribution of Carrington Rotation 2124

abstract:
  Solar eruptive phenomena, like flares and coronal mass ejections(CMEs) are
governed by magnetic fields. To describe the structure of these phenomena one
needs information on the magnetic flux density and the electric current density
vector components in three dimensions throughout the atmosphere. However,
current spectro-polarimetric measurements typically limit the determination of
the vector magnetic field only to the photosphere. Therefore, there is
considerable interest in accurate modeling of the solar coronal magnetic field
using photospheric vector magnetograms as boundary data. In this work, we model
the coronal magnetic field for global solar atmosphere using a nonlinear
force-free field(NLFFF) extrapolation codes implemented to a synoptic maps of
photospheric vector magnetic field synthesized from Vector Spectromagnetograph
(VSM) on Synoptic Optical Long-term Investigations of the Sun (SOLIS) as
boundary condition. Using the resulting three dimensional magnetic field, we
calculate the three dimensional electric current density and free magnetic
energy throughout the solar atmosphere for Carrington rotation 2124. We found
that spatially, the low-lying, current-carrying core field demonstrates strong
concentration of free energy in the AR core, from the photosphere to the lower
corona; the coronal field becomes slightly more sheared in the lowest layer and
it relaxes to the potential field configuration with height. The free energy
density appears largely co-spatial with the electric current distribution.


title: ROP: Matrix recovery via rank-one projections

abstract:
  Estimation of low-rank matrices is of significant interest in a range of
contemporary applications. In this paper, we introduce a rank-one projection
model for low-rank matrix recovery and propose a constrained nuclear norm
minimization method for stable recovery of low-rank matrices in the noisy case.
The procedure is adaptive to the rank and robust against small perturbations.
Both upper and lower bounds for the estimation accuracy under the Frobenius
norm loss are obtained. The proposed estimator is shown to be rate-optimal
under certain conditions. The estimator is easy to implement via convex
programming and performs well numerically. The techniques and main results
developed in the paper also have implications to other related statistical
problems. An application to estimation of spiked covariance matrices from
one-dimensional random projections is considered. The results demonstrate that
it is still possible to accurately estimate the covariance matrix of a
high-dimensional distribution based only on one-dimensional projections.

categories: math.ST cs.IT math.IT stat.ME stat.ML stat.TH


title: Transfinite Recursion in Higher Reverse Mathematics

abstract:
  In this paper we investigate the reverse mathematics of higher-order
analogues of the theory \ATRz{} within the framework of higher order reverse
mathematics developed by Kohlenbach \cite{Koh01}. We define a theory \RCAzthr,
a close higher-type analogue of the classical base theory \RCAz, and show that
it is essentially a conservative subtheory of Kohlenbach's base theory \RCAzo.
Working over \RCAzthr, we study higher-type analogues of statements classically
equivalent to \ATRz, including open and clopen determinacy, as well as two
choice principles, and prove several equivalences and separations. Our main
result is the separation of open and clopen determinacy for reals, using a
variant of Steel forcing; in the presentation of this result, we develop a new,
more flexible framework for Steel-type forcing.


title: Intelligent City Traffic Management and Public Transportation System

abstract:
  Intelligent Transportation System in case of cities is controlling traffic
congestion and regulating the traffic flow. This paper presents three modules
that will help in managing city traffic issues and ultimately gives advanced
development in transportation system. First module, Congestion Detection and
Management will provide user real time information about congestion on the road
towards his destination, Second module, Intelligent Public Transport System
will provide user real time public transport information,i.e, local buses, and
the third module, Signal Synchronization will help in controlling congestion at
signals, with real time adjustments of signal timers according to the
congestion. All the information that user is getting about the traffic or
public transportation will be provided on users day to day device that is
mobile through Android application or SMS. Moreover, communication can also be
done via Website for Clients having internet access. And all these modules will
be fully automated without any human intervention at server side.


title:
An Operational Approach For Wimax At Ultra High Bandwidth With Spectrum
  60 Ghz

abstract:
  WiMax is a promising network of today industry. It provides P2P and P2MP
point to multipoint broadband services up to thirty miles. Its operational
frequency range is 10 GHz to 60 GHz. It provides data rate of 75Mbps per
channel; with an end-to-end encryption called CCMP (Counter Mode with Cipher
Block Chaining Message Authentication Code Protocol). CCMP is an Advanced
Encryption Standard AES based encryption method, which delivers secure
communication. Telecom industry seeks secure, cheaper, wireless metro area
network, that full fill the today internet demand in most efficient way. Our
research explores the new dimension of WiMax with HEMT High Electron Mobility
Transistor using un-licensed Band. The Aim of this paper is to simulate 60GHz
unlicensed WiMax band in Matlab. This research explores millimeter waves,
related electronics, mathematics of WiMax and simulated graph comparison. It
determines available capacity verses coverage area and transmission bit error
probability. Further it highlights the ideal modulation condition in different
terrains. Research proofs that WiMax will be the future promising wireless
network.


title:
Optimal tunneling enhances quantum photovoltaic effect in double quantum
  dots

abstract:
  We investigate quantum photovoltaic effect in double quantum dots by applying
nonequilibrium quantum master equation. The drastic suppression of the
photovoltaic current is observed near the open circuit voltage, which leads to
the large filling factor. We find that there always exists an optimal inter-dot
tunneling that significantly enhances the photovoltaic current. The maximal
output power will also be obtained around the optimal inter-dot tunneling.
Moreover, the open circuit voltage approximately behaves as the product of the
eigen-level gap and the Carnot efficiency. These results suggest a great
potential for double quantum dots as efficient photovoltaic devices.


title:
Relative Deviation Learning Bounds and Generalization with Unbounded
  Loss Functions

abstract:
  We present an extensive analysis of relative deviation bounds, including
detailed proofs of two-sided inequalities and their implications. We also give
detailed proofs of two-sided generalization bounds that hold in the general
case of unbounded loss functions, under the assumption that a moment of the
loss is bounded. These bounds are useful in the analysis of importance
weighting and other learning tasks such as unbounded regression.


title: Multi-nucleon bound states in $N_f=2+1$ lattice QCD

abstract:
  We report on our on-going effort to calculate the properties of light nuclei
directly from quarks and gluons based on lattice QCD. After briefly introducing
our motivations and aims, we describe our strategy of fixing the strange quark
mass at its physical value and approaching the physical point for the up and
down quark masses step by step from the region of heavy quark masses. A
successful calculation for the pion mass of 0.51GeV is reviewed, and the status
for a lighter pion mass of 0.30GeV is reported.


title:
Gaussian-type lower bounds for the density of solutions of SDEs driven
  by fractional Brownian motions

abstract:
  In this paper we obtain Gaussian-type lower bounds for the density of
solutions to stochastic differential equations (SDEs) driven by a fractional
Brownian motion with Hurst parameter $H$. In the one-dimensional case with
additive noise, our study encompasses all parameters $H\in(0,1)$, while the
multidimensional case is restricted to the case $H>1/2$. We rely on a mix of
pathwise methods for stochastic differential equations and stochastic analysis
tools.


title:
Point defect modeling in materials: coupling ab initio and elasticity
  approaches

abstract:
  Modeling point defects at an atomic scale requires careful treatment of the
long-range atomic relaxations. This elastic field can strongly affect point
defect properties calculated in atomistic simulations because of the finite
size of the system under study. This is an important restriction for ab initio
methods which are limited to a few hundred atoms. We propose an original
approach coupling ab initio calculations and linear elasticity theory to obtain
the properties of an isolated point defect for reduced supercell sizes. The
reliability and benefit of our approach are demonstrated for three problematic
cases: the self-interstitial in zirconium, clusters of self-interstitials in
iron, and the neutral vacancy in silicon.


title:
Fermionic Functional Renormalization Group Approach to Superfluid Phase
  Transition

abstract:
  Fermionic functional renormalization group (FRG) is applied to describe the
superfluid phase transition of the two-component fermionic system with
attractive contact interaction. Connection between the fermionic FRG approach
and the conventional Bardeen-Cooper-Schrieffer (BCS) theory with Gorkov and
Melik-Barkhudarov (GMB) correction are clarified in details in the weak
coupling region by using the renormalization group flow of the fermionic
four-point vertex with particle-particle and particle-hole scattering
contributions. To go beyond the BCS+GMB theory, coupled FRG flow equations of
the fermion self-energy and the four-point vertex are studied under an Ansatz
concerning their frequency/momentum dependence. We found that the fermion
self-energy turns out to be substantial even in the weak couping region, and
the frequency dependence of the four-point vertex is essential to obtain the
correct asymptotic-ultraviolet behavior of the flow for the self-energy. The
superfluid transition temperature and the associated chemical potential are
calculated in the region of negative scattering lengths.

categories: cond-mat.quant-gas cond-mat.supr-con hep-ph nucl-th


title: Weighted Bloch spaces and quadratic integrals

abstract:
  Let $\mathcal{B}^{\omega}(B_d)$ denote the $\omega$-weighted Bloch space in
the unit ball $B_d$ of $\mathbb{C}^d$, $d\ge 1$. We show that the quadratic
integral $$ \int_x^1 \frac{\omega^2(t)}{t}\, dt,\quad 0<x<1, $$ governs the
radial divergence and integral reverse estimates in
$\mathcal{B}^{\omega}(B_d)$.


title:
The Fisher information and the quantum Cramer-Rao sensitivity limit of
  continuous measurements

abstract:
  Precision measurements with quantum systems rely on our ability to trace the
differences between experimental signals to variations in unknown physical
parameters. In this Letter we derive the Fisher information and the ensuing
Cramer-Rao sensitivity limit for parameter estimation by continuous
measurements on an open quantum system. We illustrate our theory by application
to resonance fluorescence from a laser driven two-state atom and we show that
photon counting and homodyne detection records yield different sensitivity to
the atomic parameters, while none of them exceed our general result.


title: Evidence for Multiferroic Characteristics in NdCrTiO5

abstract:
  We report NdCrTiO5 to be an unusual multiferroic material with large magnetic
field dependent electric polarization. While magneto-electric coupling in this
two magnetic sub-lattice oxide is well established, the purpose of this study
is to look for spontaneous symmetry breaking at the magnetic transition. The
conclusions are based on extensive magnetization, dielectric and polarization
measurements around its antiferromagnetic ordering temperature of 18K. Room
temperature X-ray diffraction pattern of NdCrTiO5 reveals that the sample is
single phase with an orthorhombic crystal structure that allows linear
magneto-electric coupling. DC magnetization measurement shows magnetization
downturn at 11K together with a small kink corresponding to the Co+3
sub-lattice ordering at ~18K. An anomaly in dielectric constant is observed
around the magnetic ordering temperature that increases substantially with
increasing magnetic field. Through detailed pyroelectric current measurements
at zero magnetic field, particularly as a function of thermal cycling, we
establish that NdCrTiO5 is a genuine multiferroic material that is possibly
driven by collinear magneto-striction.


title: Compact Stars - How Exotic Can They Be?

abstract:
  Strong interaction physics under extreme conditions of high temperature
and/or density is of central interest in modern nuclear physics for
experimentalists and theorists alike. In order to investigate such systems,
model approaches that include hadrons and quarks in a unified approach, will be
discussed. Special attention will be given to high-density matter as it occurs
in neutron stars. Given the current observational limits for neutron star
masses, the properties of hyperonic and hybrid stars will be determined. In
this context especially the question of the extent, to which exotic particles
like hyperons and quarks affect star masses, will be discussed.


title: IAX-Based Peer-to-Peer VoIP Architecture

abstract:
  Nowadays, Voice over IP (VoIP) constitutes a privileged field of service
innovation. One benefit of the VoIP technology is that it may be deployed using
a centralized or a distributed architecture. One of the most efficient
approaches used in the deployment of centralized VoIP systems is based on the
use of IAX (Inter-Asterisk Exchange), an open-source signaling/data exchange
protocol. Even though they are currently widely used, client-server VoIP
systems suffer from many weaknesses such as the presence of single points of
failure, an inefficient resources management, and system non-scalability. In
order to help the development of scalable and reliable VoIP systems, the
development community starts tending towards the deployment of the VoIP service
using a peer-to-peer distributed architecture. The aim of this paper is to
develop an IAX-based peer-to-peer VoIP architecture, an optimized VoIP
architecture that takes advantage of the benefits of the IAX protocol and those
of the peer-to-peer distribution model.


title: Exact Controllability of Complex Networks

abstract:
  Controlling complex networks is of paramount importance in science and
engineering. Despite the recent development of structural-controllability
theory, we continue to lack a framework to control undirected complex networks,
especially given link weights. Here we introduce an exact-controllability
paradigm based on the maximum multiplicity to identify the minimum set of
driver nodes required to achieve full control of networks with arbitrary
structures and link-weight distributions. The framework reproduces the
structural controllability of directed networks characterized by structural
matrices. We explore the controllability of a large number of real and model
networks, finding that dense networks with identical weights are difficult to
be controlled. An efficient and accurate tool is offered to assess the
controllability of large sparse and dense networks. The exact-controllability
framework enables a comprehensive understanding of the impact of network
properties on controllability, a fundamental problem towards our ultimate
control of complex systems.


title: Dispersion cancellation in high resolution two-photon interference

abstract:
  The dispersion cancellation observed in Hong-Ou-Mandel (HOM) interference
between frequency-entangled photon pairs has been the basis of quantum optical
coherence tomography and quantum clock synchronization. Here we explore the
effect of phase dispersion on ultranarrow HOM dips. We show that the
higher-order dispersion, the line width of the pump laser, and the spectral
shape of the parametric fluorescence have a strong effect on the dispersion
cancellation in the high-resolution regime with several experimental
verifications. Perfect dispersion cancellation with a linewidth of 3\mu m is
also demonstrated through 25 mm of water.


title:
Master equation approach to the theory of diffusion in alloys and
  calculations of enhancement factors for tracer solvent and tracer solute
  diffusion in FCC alloys

abstract:
  The earlier-suggested master equation approach is used to develop the
consistent statistical theory of diffusion in alloys using the five-frequency
model of FCC alloys as an example. Expressions for the Onsager coefficients in
terms of microscopic interatomic interactions and some statistical averages are
presented. We discuss methods of calculations of these averages using both the
mean-field and the pair-cluster approximation to describe influence of
vacancy-solute and solute-solute interactions, and both the nearest-neighbor
and the second-shell approximation to describe vacancy correlation effects. The
methods developed are used for calculations of enhancement factors which
determine the concentration dependence of tracer self-diffusion and tracer
solute diffusion in dilute FCC alloys. For the tracer self-diffusion, we show
that some significant contribution to the enhancement factor related to the
thermodynamic activity of vacancies was missed in the previous treatments of
this problem. It implies that the most of existing estimates of parameters of
the five-frequency model for real alloys should be revised. For the tracer
solute diffusion, the expression for the enhancement factor seems to be
presented for the first time. The results obtained are used to estimate the
microscopic parameters important for diffusion, including the vacancy-solute
interaction, in several FCC alloys for which necessary experimental data are
available.


title:
The stability of strong waves and its implications for pulsar wind
  shocks

abstract:
  Strong waves can mediate a shock transition between a pulsar wind and its
surroundings, playing the role of an extended precursor, in which the energy is
effectively transferred from fields to non-thermal particles. The damping of
such precursors results in an essentially unmagnetized shock near the equator.
In this context, we discuss the stability of strong waves and its implications
for the properties of shocks. Those with stable precursors can exist in the
winds of most of isolated pulsars, but the precursors may be unstable if the
external pressure in the nebula is high, as in Vela-like pulsars. Pulsar wind
shocks in eccentric binary systems, such as B1259-63, can acquire precursors
only at certain orbital phases, and this process should be accompanied by
enhanced synchro-Compton and inverse Compton emission from the precursor. The
same scenario may be at work in the binary HESS J0632+057.


title:
Enhancing Composition Window of Bicontinuous Structures by Designed
  Polydispersity Distribution of ABA Triblock Copolymers

abstract:
  The phase behavior of polydisperse ABA triblock copolymers is studied using
dissipative particle dynamics simulations, focusing on the emergence and
property of bicontinuous structures. Bicontinuous structures are characterized
by two separate, intermeshed nanoscopic domains extending throughout the
material. The connectivity of polymeric bicontinuous structures makes them
highly desirable for many applications. For conventional monodisperse diblock
and triblock copolymers, regular bicontinuous structures (i.e., gyroid and
Fddd) can be formed over a narrow composition window of ~3%. We demonstrate
that the composition window for the formation of bicontinuous structures can be
regulated by designed polydispersity distributions of ABA triblock copolymers.
In particular, introducing polydispersity in both A and B blocks can lead to a
significant enhancement of the composition window of bicontinuous structures
with both continuous A and B domains. The mechanism of the bicontinuous
structure enhancement is elucidated from the distribution of the long and short
blocks. Furthermore, it is shown that the polymeric bicontinuous structures
from polydisperse ABA triblock copolymers possess good continuity throughout
the sample, making them ideal candidates for advanced applications.


title:
Restricted Likelihood Ratio Tests for Linearity in Scalar-on-Function
  Regression

abstract:
  We propose a procedure for testing the linearity of a scalar-on-function
regression relationship. To do so, we use the functional generalized additive
model (FGAM), a recently developed extension of the functional linear model.
For a functional covariate X(t), the FGAM models the mean response as the
integral with respect to t of F{X(t),t} where F is an unknown bivariate
function. The FGAM can be viewed as the natural functional extension of
generalized additive models. We show how the functional linear model can be
represented as a simple mixed model nested within the FGAM. Using this
representation, we then consider restricted likelihood ratio tests for zero
variance components in mixed models to test the null hypothesis that the
functional linear model holds. The methods are general and can also be applied
to testing for interactions in a multivariate additive model or for testing for
no effect in the functional linear model. The performance of the proposed tests
is assessed on simulated data and in an application to measuring diesel truck
emissions, where strong evidence of nonlinearities in the relationship between
the functional predictor and the response are found.


title:
U.S. academic libraries: understanding their web presence and their
  relationship with economic indicators

abstract:
  The main goal of this research is to analyze the web structure and
performance of units and services belonging to U.S. academic libraries in order
to check their suitability for webometric studies. Our objectives include
studying their possible correlation with economic data and assessing their use
for complementary evaluation purposes. We conducted a survey of library
homepages, institutional repositories, digital collections, and online catalogs
(a total of 374 URLs) belonging to the 100 U.S. universities with the highest
total expenditures in academic libraries according to data provided by the
National Center for Education Statistics (NCES). Several data points were taken
and analyzed, including web variables (page count, external links, and visits)
and economic variables (total expenditures, expenditures on printed and
electronic books, and physical visits). The results indicate that the variety
of URL syntaxes is wide, diverse and complex, which produces a
misrepresentation of academic library web resources and reduces the accuracy of
web analysis. On the other hand, institutional and web data indicators are not
highly correlated. Better results are obtained by correlating total library
expenditures with URL mentions measured by Google (r= 0.546) and visits
measured by Compete (r= 0.573), respectively. Because correlation values
obtained are not highly significant, we estimate such correlations will
increase if users can avoid linkage problems (due to the complexity of URLs)
and gain direct access to log files (for more accurate data about visits).


title:
Inhomogeneity of donor doping in SrTiO3 substrates studied by
  fluorescence-lifetime imaging microscopy

abstract:
  Fluorescence-lifetime imaging microscopy (FLIM) was applied to investigate
the donor distribution in SrTiO3 single crystals. On the surfaces of Nb- and
La-doped SrTiO3, structures with different fluorescence intensities and
lifetimes were found that could be related to different concentrations of Ti3+.
Furthermore, the inhomogeneous distribution of donors caused a non-uniform
conductivity of the surface, which complicates the production of potential
electronic devices by the deposition of oxide thin films on top of doped single
crystals. Hence, we propose FLIM as a convenient technique (length scale: 1
$\mu$m) for characterizing the quality of doped oxide surfaces, which could
help to identify appropriate substrate materials.


title:
Aggregation of the web performance of internal university units as a
  method of quantitative analysis of a university system: the case of Spain

abstract:
  The aggregation of web performance (page count and visibility) of internal
university units could constitute a more precise indicator than the overall web
performance of the universities and, therefore, be of use in the design of
university web rankings. In order to test this hypothesis, a longitudinal
analysis of the internal units of the Spanish university system was conducted
over the course of 2010. For the 13800 URLs identified, page count and
visibility was calculated using the Yahoo API. The internal values obtained
were aggregated by university and compared with the values obtained from the
analysis of the university general URLs. The results indicate that, although
the correlations between general and internal values are high, internal
performance is low in comparison to general performance, and that they give
rise to different performance rankings. The conclusion is that the aggregation
of unit performance is of limited use due to the low levels of internal
development of the websites, and so its use is not recommended for the design
of rankings. Despite this, the internal analysis enabled the detection of,
amongst other things, a low correlation between page count and visibility due
to the widespread use of subdirectories and problems accessing certain content.


title:
Selective linking from social platforms to university websites: a case
  study of the Spanish academic system

abstract:
  Mention indicators have frequently been used in Webometric studies because
they provide a powerful tool for determining the degree of visibility and
impact of web resources. Among mention indicators, hypertextual links were a
central part of many studies until Yahoo discontinued the linkdomain command in
2011. Selective links constitute a variant of external links where both the
source and target of the link can be selected. This paper intends to study the
influence of social platforms (measured through the number of selective
external links) on academic environments, in order to ascertain both the
percentage that they constitute and whether some of them can be used as
substitutes of total external links. For this purpose, 141 URLs belonging to 76
Spanish universities were compiled in 2010 (before Yahoo! stopped their link
services), and the number of links from 13 selected social platforms to these
universities were calculated. Results confirm a good correlation between total
external links and links that come from social platforms, with the exception of
some applications (such as Digg and Technorati). For those universities with a
higher number of total external links, the high correlation is only maintained
on Delicious and Wikipedia, which can be utilized as substitutes of total
external links in the context analyzed. Notwithstanding, the global percentage
of links from social platforms constitute only a small fraction of total links,
although a positive trend is detected, especially in services such as Twitter,
Youtube, and Facebook.


title: Proposal for a multilevel university cybermetric analysis model

abstract:
  University online seats have gradually become complex systems of dynamic
information where all their institutions and services are linked and
potentially accessible. These online seats now constitute a central node around
which universities construct and document their main activities and services.
This information can be quantitative measured by cybermetric techniques in
order to design university web rankings, taking the university as a global
reference unit. However, previous research into web subunits shows that it is
possible to carry out systemic web analyses, which open up the possibility of
carrying out studies which address university diversity, necessary for both
describing the university in greater detail and for establishing comparable
ranking units. To address this issue, a multilevel university cybermetric
analysis model is proposed, based on parts (core and satellite), levels
(institutional and external) and sublevels (contour and internal), providing a
deeper analysis of institutions. Finally the model is integrated into another
which is independent of the technique used, and applied by analysing Harvard
University as an example of use.


title:
Active and sterile neutrino oscillations inside the Sun in a
  phenomenological (3+1+2)-model

abstract:
  A generalized model with three active and three sterile neutrinos is
considered on the basis of the experimental data, which allow existence of
anomalies beyond the minimally extended Standard Model with three active
neutrinos with different masses. One of the sterile neutrinos is assumed to be
comparatively heavy versus the two others, that is corresponding to the
$(3+1+2)$-model of neutrino. The model parameters used for the description of
oscillations of both active and sterile massive neutrinos are given. In the
approximation of CP-conservation, the solar neutrino oscillation
characteristics together with the sterile neutrino contributions have been
evaluated taking into account the neutrino interaction with the matter inside
the Sun. The results obtained are in accordance with the observational data and
can further be used for the description of neutrino oscillations in
astrophysical and terrestrial environments and in search of sterile neutrinos.


title: A comparative DMFT study of the eg-orbital Hubbard model in thin films

abstract:
  Heterostructures of transition-metal oxides emerged as a new route to
engineer electronic systems with desired functionalities. Motivated by these
developments, we study a two-orbital Hubbard model in a thin-film geometry
confined along the cubic [001] direction using the dynamical mean-field theory.
We contrast the results of two approximate impurity solvers (exact
diagonalization and one-crossing approximation) to the results of the
numerically exact continuous-time quantum Monte Carlo solver. Consistent with
earlier studies, we find that the one-crossing approximation performs well in
the insulating regime, while the advantage of the exact-diagonalization based
solver is more pronounced in the metallic regime. We then investigate various
aspects of strongly correlated eg-orbital systems in thin film geometries. In
particular, we show how the interfacial orbital polarization dies off quickly a
few layers from the interface and how the film thickness affects the location
of the interaction-driven Mott transition. In addition, we explore the changes
in the electronic structure with varying carrier concentration and identify
large variations of the orbital polarization in the strongly correlated regime.


title: Overview of ALICE results

abstract:
  Selected ALICE results on the global event properties, particle spectra,
azimuthal anisotropy, heavy flavour and quarkonium production in Pb-Pb
collisions at sqrt(s_NN) = 2.76 TeV are presented. First results on p-Pb
collisions at sqrt(s_NN) = 5.02 TeV are briefly reviewed.


title: Magnetic Fields in Low-mass Stars: An Overview of Observational Biases

abstract:
  Stellar magnetic dynamos are driven by rotation, rapidly rotating stars
produce stronger magnetic fields than slowly rotating stars do. The Zeeman
effect is the most important indicator of magnetic fields, but Zeeman
broadening must be disentangled from other broadening mechanisms, mainly
rotation. The relations between rotation and magnetic field generation, between
Doppler and Zeeman line broadening, and between rotation, stellar radius, and
angular momentum evolution introduce several observational biases that affect
our picture of stellar magnetism. In this overview, a few of these relations
are explicitly shown, and the currently known distribution of field
measurements is presented.


title:
Information weighted sampling for detecting rare items in finite
  populations with a focus on security

abstract:
  Frequently one has to search within a finite population for a single
particular individual or item with a rare characteristic. Whether an item
possesses the characteristic can only be determined by close inspection. The
availability of additional information about the items in the population opens
the way to a more effective search strategy than just random sampling or
complete inspection of the population. We will assume that the available
information allows for the assignment to all items within the population of a
prior probability on whether or not it possesses the rare characteristic. This
is consistent with the practice of using profiling to select high risk items
for inspection. The objective is to find the specific item with the minimum
number of inspections. We will determine the optimal search strategies for
several models according to the average number of inspections needed to find
the specific item. Using these respective optimal strategies we show that we
can order the numbers of inspections needed for the different models partially
with respect to the usual stochastic ordering. This entails also a partial
ordering of the averages of the number of inspections. Finally, the use, some
discussion, extensions, and examples of these results, and conclusions about
them are presented.


title: The unification of relativistic jets

abstract:
  I report about the unification of relativistic jets from compact objects. The
mass range is between 1.4 and 10 billion solar masses (i.e. from neutron stars
to supermassive black holes in galaxies).


title: Shielding vacuum fluctuations with graphene

abstract:
  The Casimir-Polder interaction of ground-state and excited atoms with
graphene is investigated with the aim to establish whether graphene systems can
be used as a shield for vacuum fluctuations of an underlying substrate. We
calculate the zero-temperature Casimir-Polder potential from the reflection
coefficients of graphene within the framework of the Dirac model. For both
doped and undoped graphene we show limits at which graphene could be used
effectively as a shield. Additional results are given for AB-stacked bilayer
graphene.


title: Description of coupling in the category of transitive Lie algebroids

abstract:
  In our previous paper (arXiv:1306.5449) we have given a sufficient and
necessary condition when the coupling between Lie algebra bundle (LAB) and the
tangent bundle exists in the sense of Mackenzie (\cite{Mck-2005}, Definition
7.2.2) for the theory of transitive Lie algebroids. Namely we have defined a
new topology on the group $\Aut(\rg)$ of all automorphisms of the Lie algebra
$\rg$, say $\Aut(\rg)^{\delta}$, and show that tangent bundle $TM$ can be
coupled with the Lie algebra bundle $L$ if and only if the Lie algebra bundle L
admits a local trivial structure with structural group endowed with such new
topology.
  But the question how many couplings exist under these conditions still
remains open. Here we make the result more accurate and prove that there is a
one-to-one correspondence between the family $Coup(L)$ of all coupling of the
Lie algebra bundle $L$ with fixed finite dimensional Lie algebra $\rg$ as the
fiber and the structural group $\Aut(\rg)$ of all automorphisms of Lie algebra
$\rg$ and the tangent bundle $TM$ and the family $LAB^{\delta}(L)$ of
equivalent classes of local trivial structures with structural group
$\Aut(\rg)$ endowed with new topology $\Aut(\rg)^{\delta}$.
  This result gives a way for geometric construction of the classifying space
for transitive Lie algebroids with fixed structural finite dimensiaonal Lie
algebra $\rg$. Hence we can clarify a categorical description of the
characteristic classes for transitive Lie algebroids and a comparison with that
by J. Kubarski.


title: Effects of plasma on gravitational lensing

abstract:
  We study gravitational lensing when plasma surrounds the lens. An extra
deflection angle is induced by the plasma in addition to the deflection
generated by gravity. An inhomogeneous plasma distribution generates a greater
effect than a homogeneous one, and may cause significant effects to be detected
in low frequency radio observations (a few hundred MHz). In particular, the
lensed image positions will be different between optical and radio
observations. The change of position due to a plasma can reach a few tens of
milli-arcsec, which is readily detectable. One can use the position difference
in different frequencies to estimate the density of plasma in the lens. The
magnification ratios between multiple images are mainly determined by other
properties of the lens, and are only weakly affected by the plasma. More
importantly, we find that the strong lensing time delay will be affected by the
plasma. Estimation of the Hubble constant from the time delay in low radio
frequency observation may be slightly biased due to plasma in the lens.
Unfortunately, the ionosphere of the Earth strongly affects low frequency radio
observations. Thus our ability to detect the effect depends on how well we are
able to calibrate out the ionosphere.


title:
Observation of the decay $\psi(3686)$ $\rightarrow$
  $\Lambda\bar\Sigma^{\pm}\pi^{\mp}+c.c.$

abstract:
  Using a sample of $1.06\times10^{8}$ $\psi(3686)$ events collected with the
BESIII detector, we present the first observation of the decays of $\psi(3686)$
$\rightarrow$ $\Lambda\bar\Sigma^{+}\pi^{-}+c.c.$ and $\psi(3686)$
$\rightarrow$ $\Lambda\bar\Sigma^{-}\pi^{+}+c.c.$. The branching fractions are
measured to be $\mathcal{B}(\psi(3686) \rightarrow \Lambda\bar\Sigma^{+}\pi^{-}
+ c.c.)=(1.40\pm 0.03 \pm 0.13)\times10^{-4}$ and $\mathcal{B}(\psi(3686)
\rightarrow \Lambda\bar\Sigma^{-}\pi^{+}+c.c.)=(1.54\pm 0.04 \pm
0.13)\times10^{-4}$, where the first errors are statistical and the second ones
systematic.


title: Removable sets for Lipschitz harmonic functions on Carnot groups

abstract:
  Let G be a Carnot group with homogeneous dimension Q larger than 2 and let L
be a sub-Laplacian on G. We prove that the critical dimension for removable
sets of Lipschitz L-harmonic functions is Q-1. Moreover we construct
self-similar sets with positive and finite (Q-1) dimensional Hausdorff measure
which are removable.


title: Priority-based intersection management with kinodynamic constraints

abstract:
  We consider the problem of coordinating a collection of robots at an
intersection area taking into account dynamical constraints due to actuator
limitations. We adopt the coordination space approach, which is standard in
multiple robot motion planning. Assuming the priorities between robots are
assigned in advance and the existence of a collision-free trajectory respecting
those priorities, we propose a provably safe trajectory planner satisfying
kinodynamic constraints. The algorithm is shown to run in real time and to
return safe (collision-free) trajectories. Simulation results on synthetic data
illustrate the benefits of the approach.


title: Donsker-Varadhan asymptotics for degenerate jump Markov processes

abstract:
  We consider a class of continuous time Markov chains on a compact metric
space that admit an invariant measure strictly positive on open sets together
with absorbing states. We prove the joint large deviation principle for the
empirical measure and flow. Due to the lack of uniform ergodicity, the zero
level set of the rate function is not a singleton. As corollaries, we obtain
the Donsker-Varadhan rate function for the empirical measure and a variational
expression of the rate function for the empirical flow.


title:
Superconducting properties of the ternary transition-metal silicide
  Zr2Ru3Si4

abstract:
  Superconducting properties of the polycrystalline Zr2Ru3Si4 were investigated
by the electrical resistivity, magnetization and specific heat. By these
measurements, bulk superconductivity with transition temperature Tc = 5.5 K was
confirmed. Moreover, Zr2Ru3Si4 was found to be a type-II and
intermediate-coupling superconductor. Interestingly, the electronic specific
heat shows a deviation from a one-gap s-wave model and Hc2(T) shows unusual
positive curvature in the vicinity of Tc. The first principle's calculation
shows the existence of plural anisotropic Fermi surfaces. These results suggest
that Zr2Ru3Si4 is not an isotropic single-gap superconductor, but possibly a
multi-gap or an anisotropic gap superconductor.


title:
On the solutions of a singular elliptic equation concentrating on a
  circle

abstract:
  Let $A=\{x\in \R^{2N+2} : 0< a< |x| <b\}$ be an annulus. Consider the
following singularly perturbed elliptic problem on $A$
  \begin{equation}
  \begin{array}{lll}
  -\eps^2{\De u} + |x|^{\alpha}u = |x|^{\alpha}u^p, &\mbox{\qquad in} A \notag
u>0 &\mbox{\qquad in} A
  \frac{\partial u}{\partial\nu} = 0 &\mbox{\qquad on} \partial A
  \end{array} %\label{a1}
  \end{equation} $1<p<2^*-1$. We shall show that there exists a positive
solution $u_\eps$ concentrating on an $S^1$ orbit as $\eps\to 0$. We prove this
by reducing the problem to a lower dimensional one and analyzing a single point
concentrating solution in the lower dimensional space. We make precise how the
single peak concentration depends on the parameter $\alpha$.


title: Threshold for Non-Thermal Stabilization of Open Quantum Systems

abstract:
  We generally study whether or not the information of an open quantum system
could be totally erased by its surrounding environment in the long time. For a
harmonic oscillator coupled to a bath of a spectral density with zero-value
regions, we quantitatively present a threshold of system-bath coupling
\eta_{c}, above which the initial information of the system can remains
partially as its long time stablization deviates from the usual thermalization.
This non-thermal stabilization happens as a non-Markovian effect.


title:
Relations dans l'alg\`ebre de Lie fondamentale des motifs elliptiques
  mixtes

abstract:
  Hain and Matsumoto constructed a category of universal mixed elliptic motives
and described the fundamental Lie algebra of this category, relating it to a
certain graded and filtered Lie algebra E. In an unpublished paper, Aaron
Pollack proved a result on relations in a certain quotient of E, and gave
several examples of actual relations in small weight that naturally lead to a
conjecture about the existence of such relations in all weights. In this
article, we prove this conjecture in depth 3, establishing the existence in all
weights of relations of the type noted in Pollack's examples. ----- Richard
Hain et Makoto Matsumoto ont construit une cat\'egorie de motifs elliptiques
mixtes universels et d\'ecrit l'alg\`ebre de Lie fondamentale de cette
cat\'egorie en la reliant \`a une certaine alg\`ebre de Lie gradu\'ee et
filtr\'ee E. Dans un article non publi\'e, Aaron Pollack a d\'emontr\'e un
r\'esultat sur les relations dans un certain quotient de E, et donn\'e
plusieurs exemples de relations en petit poids qui conduisent \`a une
conjecture sur l'existence de telles relations en tout poids. Dans le pr\'esent
article, nous prouvons cette conjecture en profondeur 3, \'etablissant
l'existence en tout poids de relations du type d\'ecrit dans les exemples de
Pollack.


title: The Cauchy problem for the Pavlov equation

abstract:
  Commutation of multidimensional vector fields leads to integrable nonlinear
dispersionless PDEs arising in various problems of mathematical physics and
intensively studied in the recent literature. This report is aiming to solve
the scattering and inverse scattering problem for integrable dispersionless
PDEs, recently introduced just at a formal level, concentrating on the
prototypical example of the Pavlov equation, and to justify an existence
theorem for global bounded solutions of the associated Cauchy problem with
small data.


title:
The innermost regions of the jet in NRAO 150. Wobbling or internal
  rotation?

abstract:
  NRAO 150 is a very bright millimeter to radio quasar at redshift $z$=1.52 for
which ultra-high-resolution VLBI monitoring has revealed a counter-clockwise
jet-position-angle wobbling at an angular speed $\sim11^{\circ}$/yr in the
innermost regions of the jet. In this paper we present new total and linearly
polarized VLBA images at 43 GHz extending previous studies to cover the
evolution of the jet in NRAO 150 between 2006 and early 2009. We propose a new
scenario to explain the counter-clockwise rotation of the jet position angle
based on a helical motion of the components in a jet viewed faced-on. This
alternative scenario is compatible with the interpretation suggested in
previous works once the indetermination of the absolute position of the
self-calibrated VLBI images is taken into account. Fitting of the jet
components motion to a simple internal rotation kinematical model shows that
this scenario is a likely alternative explanation for the behavior of the
innermost regions in the jet of NRAO 150.


title:
Experimental effects on dynamics and thermodynamics in nuclear reactions
  on the symmetry energy as seen by the CHIMERA 4$\pi$ detector

abstract:
  Heavy ion collisions have been widely used in the last decade to constraint
the parameterizations of the symmetry energy term of nuclear equation of state
(EOS) for asymmetric nuclear matter as a function of baryonic density. In the
Fermi energy domain one is faced with variations of the density within a narrow
range of values around the saturation density $\rho_0$=0.16 fm$^{-3}$ down
towards sub-saturation densities. The experimental observables which are
sensitive to the symmetry energy are constructed starting from the detected
light particles, clusters and heavy fragments that, in heavy ion collisions,
are generally produced by different emission mechanisms at different stages and
time scales of the reaction. In this review the effects of dynamics and
thermodynamics on the symmetry energy in nuclear reactions are discussed and
characterized using an overview of the data taken so far with the CHIMERA
multi-detector array.


title: Mori fibre spaces for K\"ahler threefolds

abstract:
  Let X be a compact Kaehler threefold such that the base of the MRC-fibration
has dimension two. We prove that X is bimeromorphic to a Mori fibre space.
Together with our earlier result arXiv:1304.4013 this completes the MMP for
compact Kaehler threefolds: let X be a non-projective compact Kaehler
threefold. Then X has a minimal model or X is bimeromorphic to a Mori fibre
space over a non-projective Kaehler surface.


title: Hybridized Discontinuous Galerkin Method with Lifting Operator

abstract:
  In this paper, we propose a new hybridized discontinuous Galerkin method for
the Poisson equation with homogeneous Dirichlet boundary condition. Our method
has the advantage that the stability is better than the previous hybridized
method. We derive $L^2$ and $H^1$ error estimates of optimal order. Some
numerical results are presented to verify our analysis.


title: Extreme Scaling of Lattice Quantum Chromodynamics

abstract:
  As the complexity and size of challenges in science and engineering are
continually increasing, it is highly important that applications are able to
scale strongly to very large numbers of cores (>100,000 cores) to enable HPC
systems to be utilised efficiently. This paper presents results of strong
scaling tests performed with an MPI only and a hybrid MPI + OpenMP version of
the Lattice QCD application BQCD on the European Tier-0 system SuperMUC at LRZ.


title: Extensions of natural Hamiltonians

abstract:
  Given an n-dimensional natural Hamiltonian L on a Riemannian or
pseudo-Riemannian manifold, we call "extension" of L the n+1 dimensional
Hamiltonian $H=\frac 12 p_u^2+\alpha(u)L+\beta(u)$ with new canonically
conjugated coordinates $(u,p_u)$. For suitable L, the functions $\alpha$ and
$\beta$ can be chosen depending on any natural number m such that H admits an
extra polynomial first integral in the momenta of degree m, explicitly
determined in the form of the m-th power of a differential operator applied to
a certain function of coordinates and momenta. In particular, if L is maximally
superintegrable (MS) then H is MS also. Therefore, the extension procedure
allows the creation of new superintegrable systems from old ones. For m=2, the
extra first integral generated by the extension procedure determines a
second-order symmetry operator of a Laplace-Beltrami quantization of H,
modified by taking in account the curvature of the configuration manifold. The
extension procedure can be applied to several Hamiltonian systems, including
the three-body Calogero and Wolfes systems (without harmonic term), the
Tremblay-Turbiner-Winternitz system and n-dimensional anisotropic harmonic
oscillators. We propose here a short review of the known results of the theory
and some previews of new ones.


title: Ontology based data warehouses federation management system

abstract:
  Data warehouses are nowadays an important component in every competitive
system, it's one of the main components on which business intelligence is
based. We can even say that many companies are climbing to the next level and
use a set of Data warehouses to provide the complete information or it's
generally due to fusion of two or many companies. these Data warehouses can be
heterogeneous and geographically separated, this structure is what we call
federation, and even if the components are physically separated, they are
logically seen as a single component. generally, these items are heterogeneous
which make it difficult to create the logical federation schema,and the
execution of user queries a complicated mission. In this paper, we will fill
this gap by proposing an extension of an existent algorithm in order to treat
different schema types (star, snow flack) including the treatment of
hierarchies dimension using ontology


title: An Empirical Study of Intel Xeon Phi

abstract:
  With at least 50 cores, Intel Xeon Phi is a true many-core architecture.
Featuring fairly powerful cores, two cache levels, and very fast
interconnections, the Xeon Phi can get a theoretical peak of 1000 GFLOPs and
over 240 GB/s. These numbers, as well as its flexibility - it can be used both
as a coprocessor or as a stand-alone processor - are very tempting for parallel
applications looking for new performance records.
  In this paper, we present an empirical study of Xeon Phi, stressing its
performance limits and relevant performance factors, ultimately aiming to
present a simplified view of the machine for regular programmers in search for
performance.
  To do so, we have micro-benchmarked the main hardware components of the
processor - the cores, the memory hierarchies, the ring interconnect, and the
PCIe connection. We show that, in ideal microbenchmarking conditions, the
performance that can be achieved is very close to the theoretical peak, as
given in the official programmer's guide. We have also identified and
quantified several causes for significant performance penalties. Our findings
have been captured in four optimization guidelines, and used to build a
simplified programmer's view of Xeon Phi, eventually enable the design and
prototyping of applications on a functionality-based model of the architecture.


title: Majorana phases in neutrino-antineutrino oscillations

abstract:
  If the massive neutrinos are Majorana particles, neutrinoless double beta
($0\nu\beta\beta$) decay experiments are not enough to determine the Majorana
phases. We carry out a systematic study of CP violation in
neutrino-antineutrino oscillations. In these processes, CP-conserving parts
involve six independent $0\nu\beta\beta$-like mass terms $\langle
m\rangle_{\alpha\beta}$ and CP-violating parts are associated with nine
independent Jarlskog-like parameters ${\cal V}^{ij}_{\alpha\beta}$ (for
$\alpha, \beta = e, \mu, \tau$ and $i, j = 1, 2,3$). With the help of current
neutrino oscillation data, we illustrate the salient features of six
independent CP-violating asymmetries between $\nu_\alpha \to \bar{\nu}_\beta$
and $\bar{\nu}_\alpha \to \nu_\beta$ oscillations.


title: Lozenge tilings, Glauber dynamics and macroscopic shape

abstract:
  We study the Glauber dynamics on the set of tilings of a finite domain of the
plane with lozenges of side 1/L. Under the invariant measure of the process
(the uniform measure over all tilings), it is well known that the random height
function associated to the tiling converges in probability, in the scaling
limit $L\to\infty$, to a non-trivial macroscopic shape minimizing a certain
surface tension functional.
  According to the boundary conditions the macroscopic shape can be either
analytic or contain "frozen regions" (Arctic Circle phenomenon). It is widely
conjectured, on the basis of theoretical considerations, partial mathematical
results and numerical simulations for similar models, that the Glauber dynamics
approaches the equilibrium macroscopic shape in a time of order $L^{2+o(1)}$.
In this work we prove this conjecture, under the assumption that the
macroscopic equilibrium shape contains no "frozen region".


title:
Mean-field backward stochastic differential equations with
  subdifferrential operator and its applications

abstract:
  In this paper, we deal with a class of mean-field backward stochastic
differential equations with subdifferrential operator corresponding to a lower
semi-continuous convex function. By means of Yosida approximation, the
existence and uniqueness of the solution is established. As an application, we
give a probability interpretation for the viscosity solutions of a class of
nonlocal parabolic variational inequalities.


title: Recent soft diffraction results from HERA

abstract:
  High statistics measurements of the diffractive reduced cross section
$\sigma_r^D$ from the H1 collaboration are presented which make use of two
different experimental methods to achieve the largest possible coverage of the
kinematic phase space at HERA. The HERA combined diffractive reduced cross
sections based on events with a leading proton are also presented. %High
statistics measurements of the diffractive reduced cross section $\sigma_r^D$
have been made by H1 collaboration using two experimental methods covering
accessible kinematic region. The HERA combined diffractive double-differential
reduced cross sections in events % with a leading proton were obtained and
compared with theoretical predictions.


title:
Control of Majorana Edge Modes by a g-factor Engineered Nanowire Spin
  Transistor

abstract:
  We propose the manipulation of Majorana edge states via hybridization and
spin currents in a nanowire spin transistor. The spin transistor is based on a
heterostructure nanowire comprising of semiconductors with large and small
g-factors that form the topological and non-topological regions respectively.
The hybridization of bound edge states results in spin currents and
$4\pi$-periodic torques, as a function of the relative magnetic field angle --
an effect which is dual to the fractional Josephson effect. We establish
relation between torques and spin-currents in the non-topological region where
the magnetic field is almost zero and spin is conserved along the spin-orbit
field direction. The angular momentum transfer could be detected by sensitive
magnetic resonance force microscopy techniques.

categories: cond-mat.mes-hall cond-mat.mtrl-sci cond-mat.supr-con quant-ph


title: Evaluation and Performance of Reactive Protocols Using Mobility Model

abstract:
  A Mobile Ad-hoc Network (MANET) is a self-motivated wireless network which
has no centralized point. It is an independent network that is connected by
wireless link so, in which every point or device work as a router. In this
network every node forward the packets to the destination as a router and it's
not operating as an ending point. In this network every node adjusts them self
by on his way in any direction because they are independent and change their
position regularly. There are exist three main types of routing protocols which
are reactive, proactive and final is hybrid protocols. This whole work compares
the performance of some reactive protocols which also known as on - demand
protocols, which are DSR, AODV and the final is AOMDV. DSR and AODV are
reactive protocols which connected the devices on the network when needed by a
doorway. The AOMDV protocol was designed for ad hoc networks whenever any route
or link fail and also maintain routes with sequence numbers to avoid looping.


title: On a bilateral birth-death process with alternating rates

abstract:
  We consider a bilateral birth-death process characterized by a constant
transition rate $\lambda$ from even states and a possibly different transition
rate $\mu$ from odd states. We determine the probability generating functions
of the even and odd states, the transition probabilities, mean and variance of
the process for arbitrary initial state. Some features of the birth-death
process confined to the non-negative integers by a reflecting boundary in the
zero-state are also analyzed. In particular, making use of a Laplace transform
approach we obtain a series form of the transition probability from state 1 to
the zero-state.


title: Remote Control of Mobile Devices in Android Platform

abstract:
  Remote control systems are a very useful element to control and monitor
devices quickly and easily. This paper proposes a new architecture for remote
control of Android mobile devices, analyzing the different alternatives and
seeking the optimal solution in each case. Although the area of remote control,
in case of mobile devices, is little explored, it may provide important
advantages for testing software and hardware developments in several real
devices. It can also allow an efficient management of various devices of
different types for performing different tasks, related for example to security
or forensic tasks.
  The main idea behind the proposed architecture was the design of a system to
use it as a platform which provides the services needed to perform remote
control of mobile devices. As a result of this research, a proof of concept was
implemented. An Android application running a group of server programs on the
device, connected to the network or USB interface, depending on availability.
This servers can be controlled through a small client written in Java and
runnable both on desktop and web systems.


title:
Impurity Effect on the Local Density of States around a Vortex in
  Noncentrosymmetric Superconductors

abstract:
  We numerically study the effect of non-magnetic impurities on the vortex
bound states in noncentrosymmetric systems. The local density of states (LDOS)
around a vortex is calculated by means of the quasiclassical Green's function
method. We find that the zero energy peak of the LDOS splits off with
increasing the impurity scattering rate.


title: Time-resolved dynamics of granular matter by random laser emission

abstract:
  Because of the huge commercial importance of granular systems, the
second-most used material in industry after water, intersecting the industry in
multiple trades, like pharmacy and agriculture, fundamental research on
grain-like materials has received an increasing amount of attention in the last
decades. In photonics, the applications of granular materials have been only
marginally investigated. We report the first phase-diagram of a granular as
obtained by laser emission. The dynamics of vertically-oscillated granular in a
liquid solution in a three-dimensional container is investigated by employing
its random laser emission. The granular motion is function of the frequency and
amplitude of the mechanical solicitation, we show how the laser emission allows
to distinguish two phases in the granular and analyze its spectral
distribution. This constitutes a fundamental step in the field of granulars and
gives a clear evidence of the possible control on light-matter interaction
achievable in grain-like system.


title:
Black Strings from Minimal Geometric Deformation in a Variable Tension
  Brane-World

abstract:
  We study brane-world models with variable brane tension and compute
corrections to the horizon of a black string along the extra dimension. The
four-dimensional geometry of the black string on the brane is obtained by means
of the minimal geometric deformation approach, and the bulk corrections are
then encoded in additional terms involving the covariant derivatives of the
variable brane tension. Our investigation shows that the variable brane tension
strongly affects the shape and evolution of the black string horizon along the
extra dimension, at least in a near-brane expansion. In particular, we apply
our general analysis to a model motivated by the E\"otv\"os branes, where the
variable brane tension is related to the Friedmann-Robertson-Walker brane-world
cosmology. We show that for some stages in the evolution of the universe, the
black string warped horizon collapses to a point and the black string has
correspondingly finite extent along the extra dimension. Furthermore, we show
that in the minimal geometric deformation of a black hole on the variable
tension brane, the black string has a throat along the extra dimension, whose
area tends to zero as time goes to infinity.


title:
Production and Characterisation of SLID Interconnected n-in-p Pixel
  Modules with 75 Micrometer Thin Silicon Sensors

abstract:
  The performance of pixel modules built from 75 micrometer thin silicon
sensors and ATLAS read-out chips employing the Solid Liquid InterDiffusion
(SLID) interconnection technology is presented. This technology, developed by
the Fraunhofer EMFT, is a possible alternative to the standard bump-bonding. It
allows for stacking of different interconnected chip and sensor layers without
destroying the already formed bonds. In combination with Inter-Chip-Vias (ICVs)
this paves the way for vertical integration. Both technologies are combined in
a pixel module concept which is the basis for the modules discussed in this
paper.
  Mechanical and electrical parameters of pixel modules employing both SLID
interconnections and sensors of 75 micrometer thickness are covered. The
mechanical features discussed include the interconnection efficiency, alignment
precision and mechanical strength. The electrical properties comprise the
leakage currents, tuning characteristics, charge collection, cluster sizes and
hit efficiencies. Targeting at a usage at the high luminosity upgrade of the
LHC accelerator called HL-LHC, the results were obtained before and after
irradiation up to fluences of $10^{16}$
$\mathrm{n}_{\mathrm{eq}}/\mathrm{cm}^2$ (1 MeV neutrons).


title:
Refined position angle measurements for galaxies of the SDSS Stripe 82
  co-added dataset

abstract:
  Position angle measurements of Sloan Digital Sky Survey (SDSS) galaxies, as
measured by the surface brightness profile fitting code of the SDSS photometric
pipeline (Lupton 2001), are known to be strongly biased, especially in the case
of almost face-on and highly inclined galaxies. To address this issue we
developed a reliable algorithm which determines position angles by means of
isophote fitting. In this paper we present our algorithm and a catalogue of
position angles for 26397 SDSS galaxies taken from the deep co-added Stripe 82
(equatorial stripe) images.


title:
Approximations of quantum-graph vertex couplings by singularly scaled
  rank-one operators

abstract:
  We investigate approximations of the vertex coupling on a star-shaped graph
by families of operators with singularly scaled rank-one interactions. We find
a family of vertex couplings, generalizing the $\delta'$-interaction on the
line, and show that with a suitable choice of the parameters they can be
approximated in this way in the norm-resolvent sense. We also analyze spectral
properties of the involved operators and demonstrate convergence of the
corresponding on-shell scattering matrices.


title:
Timing of a Young Mildly Recycled Pulsar with a Massive White Dwarf
  Companion

abstract:
  We report on timing observations of the recently discovered binary pulsar PSR
J1952+2630 using the Arecibo Observatory. The mildly recycled 20.7-ms pulsar is
in a 9.4-hr orbit with a massive, M_WD > 0.93 M_sun, white dwarf (WD)
companion. We present, for the first time, a phase-coherent timing solution,
with precise spin, astrometric, and Keplerian orbital parameters. This shows
that the characteristic age of PSR J1952+2630 is 77 Myr, younger by one order
of magnitude than any other recycled pulsar-massive WD system. We derive an
upper limit on the true age of the system of 50 Myr. We investigate the
formation of PSR J1952+2630 using detailed modelling of the mass-transfer
process from a naked helium star on to the neutron star following a
common-envelope phase (Case BB Roche-lobe overflow). From our modelling of the
progenitor system, we constrain the accretion efficiency of the neutron star,
which suggests a value between 100 and 300% of the Eddington accretion limit.
We present numerical models of the chemical structure of a possible
oxygen-neon-magnesium WD companion. Furthermore, we calculate the past and the
future spin evolution of PSR J1952+2630, until the system merges in about 3.4
Gyr due to gravitational wave emission. Although we detect no relativistic
effects in our timing analysis we show that several such effects will become
measurable with continued observations over the next 10 years; thus PSR
J1952+2630 has potential as a testbed for gravitational theories.


title: Recent developments in jet quenching theory

abstract:
  Motivated by the new results obtained in heavy-ion collision experiments at
the LHC, several extensions of the standard calculations of energy loss have
been made recently. In this manuscript, I provide a short overview of some of
the recent developments in jet quenching theory. First, I discuss some
improvements computed by different groups to implement energy-momentum
conservation in a rigorous way, relaxing some of the assumptions that were made
in the standard jet quenching calculations. Second, quantum interference
effects between different parton emitters when propagating through an extended
coloured medium will be considered, with a quark- antiquark antenna as a model
setup. Finally, other recent extensions as the modification of the colour flow
inside a jet in a QCD medium with respect to vacuum, and the use of SCET to
compute transverse momentum broadening and medium-induced gluon radiation, will
be very briefly presented.


title:
Probing the metallicity and ionization state of the circumgalactic
  medium at z~6 and beyond with OI absorption

abstract:
  Low ionization metal absorption due to OI has been identified as an important
probe of the physical state of the inter-/circumgalactic medium at the tail-end
of reionization. We use here high-resolution hydrodynamic simulations to
interpret the incidence rate of OI absorbers at z~6 as observed by Becker et
al. (2011). We infer weak OI absorbers (EW > 0.1 A) to have typical HI column
densities in the range of sub-DLAs, densities of 80 times the mean baryonic
density and metallicities of about 1/500 th solar. This is similar to the
metallicity inferred at similar overdensities at z~3, suggesting that the metal
enrichment of the circumgalactic medium around low-mass galaxies has already
progressed considerably by z~6. The apparently rapid evolution of the incidence
rates for OI absorption over the redshift range 5<z<6 mirrors that of
self-shielded Lyman-Limit systems at lower redshift and is mainly due to the
rapid decrease of the meta-galactic photo-ionization rate at z>5. We predict
the incidence rate of OI absorbers to continue to rise rapidly with increasing
redshift as the IGM becomes more neutral. If the distribution of metals extends
to lower density regions, OI absorbers will allow the metal enrichment of the
increasingly neutral filamentary structures of the cosmic web to be probed.


title: Algebras of conjugacy classes of partial elements

abstract:
  In 2001 Ivanov and Kerov associated with the infinite permutation group
$S_\infty$ certain commutative associative algebra $A_\infty$ called the
algebra of conjugacy classes of partial elements. A standard basis of
$A_\infty$ is labeled by Yang diagrams of all orders.
  Mironov, Morozov, Natanzon, 2012, have proved that the completion of
$A_\infty$ is isomorphic to the direct product of centers of group algebras of
groups $S_n$. This isomorphism was explored in a construction of infinite
dimensional Cardy-Frobenius algebra corresponding to asymptotic Hurwitz
numbers.
  In this work algebras of conjugacy classes of partial elements are defined
for a wider class of infinite groups. It is proven that completion of any such
algebra is isomorphic to the direct product of centers of group algebras of
relevant subgroups.


title: Phases of information release during black hole evaporation

abstract:
  In a recent article, we have shown how quantum fluctuations of the background
geometry modify Hawking's density matrix for black hole (BH) radiation.
Hawking's diagonal matrix picks up small off-diagonal elements whose influence
becomes larger with the number of emitted particles. We have calculated the
"time-of-first-bit", when the first bit of information comes out of the BH, and
the "transparency time", when the rate of information release becomes order
unity. We have found that the transparency time is equal to the "Page time",
when the BH has lost half of its initial entropy to the radiation, in agreement
with Page's results. Here, we improve our previous calculation by keeping track
of the time of emission of the Hawking particles and their back-reaction on the
BH. Our analysis reveals a new time scale, the radiation "coherence time",
which is equal to the geometric mean of the evaporation time and the light
crossing time. We find, as for our previous treatment, that the
time-of-first-bit is equal to the coherence time, which is much shorter than
the Page time. But the transparency time is now much later than the Page time,
just one coherence time before the end of evaporation. Close to the end, when
the BH is parametrically of Planckian dimensions but still large, the coherence
time becomes parametrically equal to the evaporation time, thus allowing the
radiation to purify. We also determine the time dependence of the entanglement
entropy of the early and late-emitted radiation. This entropy is small during
most of the lifetime of the BH, but our qualitative analysis suggests that it
becomes parametrically maximal near the end of evaporation.


title:
Stability of surface states of weak $\mathbb{Z}_2$ topological
  insulators and superconductors

abstract:
  We study the stability against disorder of surface states of weak
$\mathbb{Z}_2$ topological insulators (superconductors) which are stacks of
strong $\mathbb{Z}_2$ topological insulators (superconductors), considering
representative Dirac Hamiltonians in the Altland-Zirnbauer symmetry classes in
various spatial dimensions. We show that, in the absence of disorder, surface
Dirac fermions of weak $\mathbb{Z}_2$ topological insulators (superconductors)
can be gapped out by a Dirac mass term which couples surface Dirac cones and
leads to breaking of a translation symmetry (dimerization). The dimerization
mass is a unique Dirac mass term in the surface Dirac Hamiltonian, and the two
dimerized gapped phases which differ in the sign of the Dirac mass are
distinguished by a $\mathbb{Z}_2$ index. In other words the dimerized surfaces
can be regarded as a strong $\mathbb{Z}_2$ topological insulator
(superconductor). We argue that the surface states are not localized by
disorder when the ensemble average of the Dirac mass term vanishes.


title: Visibility of unstable oscillation modes in a rapidly rotating B star

abstract:
  Space missions like CoRoT and Kepler have provided numerous new observations
of stellar oscillations in a multitude of stars by high precision photometry.
This work compares the observed rich oscillation spectrum of the rapidly
rotating B3 IV star HD 43317 with the first results obtained by a new method to
calculate unstable oscillation modes in rapidly rotating stars in order to see
whether some of the observed modes can be identified. The new numerical method
consists of two parts. We first search for modes resonant with a prescribed
forcing symmetry by moving through relevant regions of complex frequency space
and monitoring any increase of the stellar response to the applied forcing and
zooming in onto the resonance. These resonant non-adiabatic 2D-solutions are
then fed into a 2D relaxation code with the same equations but without forcing
terms. The complex oscillation frequency used in the forcing is now no longer
prescribed, but added as an extra unknown. The corresponding free oscillation
mode is usually obtained after a few ($<10$) iterations with only minor
adjustment of the complex oscillation frequency. To compare with the observed
light variations we calculate the `visibility' of the found unstable
oscillation modes, taking into account the cancellation of the various parts of
the radiating oscillating stellar surface as seen by the observer. The
frequencies of unstable axisymmetric g-modes, which have the highest
visibility, appear to nearly coincide with the observed largest amplitude
photometric variations of HD 43317, making an identification of the latter
oscillations as $m$=0 modes plausible. The identification of $m$=1 g-modes is
less straightforward, while many of the unstable even $m$=2 g-modes may
correspond to observed weaker photometric variations.


title:
Maximal amenable subalgebras of von Neumann algebras associated with
  hyperbolic groups

abstract:
  We prove that for any infinite, maximal amenable subgroup $H$ in a hyperbolic
group $G$, the von Neumann subalgebra $LH$ is maximal amenable inside $LG$. It
provides many new, explicit examples of maximal amenable subalgebras in II$_1$
factors. We also prove similar maximal amenability results for direct products
of relatively hyperbolic groups and orbit equivalence relations arising from
measure-preserving actions of such groups.


title:
Radiation Magnetohydrodynamics In Global Simulations Of Protoplanetary
  Disks

abstract:
  Our aim is to study the thermal and dynamical evolution of protoplanetary
disks in global simulations, including the physics of radiation transfer and
magneto-hydrodynamic (MHD) turbulence caused by the magneto-rotational
instability. We develop a radiative transfer method based on the flux-limited
diffusion approximation that includes frequency dependent irradiation by the
central star. This hybrid scheme is implemented in the PLUTO code. The focus of
our implementation is on the performance of the radiative transfer method.
Using an optimized Jacobi preconditioned BiCGSTAB solver, the radiative module
is three times faster than the MHD step for the disk setup we consider. We
obtain weak scaling efficiencies of 70% up to 1024 cores. We present the first
global 3D radiation MHD simulations of a stratified protoplanetary disk. The
disk model parameters are chosen to approximate those of the system AS 209 in
the star-forming region Ophiuchus. Starting the simulation from a disk in
radiative and hydrostatic equilibrium, the magnetorotational instability
quickly causes MHD turbulence and heating in the disk. For the disk parameters
we use, turbulent dissipation heats the disk midplane and raises the
temperature by about 15% compared to passive disk models. A roughly flat
vertical temperature profile establishes in the disk optically thick region
close to the midplane. We reproduce the vertical temperature profile with a
viscous disk models for which the stress tensor vertical profile is flat in the
bulk of the disk and vanishes in the disk corona. The present paper
demonstrates for the first time that global radiation MHD simulations of
turbulent protoplanetary disks are feasible with current computational
facilities. This opens up the windows to a wide range of studies of the
dynamics of protoplanetary disks inner parts, for which there are significant
observational constraints.


title: Polarization in binary microlensing events

abstract:
  The light received by source stars in microlensing events may be
significantly polarized if both an efficient photon scattering mechanism is
active in the source stellar atmosphere and a differential magnification is
therein induced by the lensing system. The best candidate events for observing
polarization are highly magnified events with source stars belonging to the
class of cool, giant stars {in which the stellar light is polarized by photon
scattering on dust grains contained in their envelopes. The presence in the
stellar atmosphere of an internal cavity devoid of dust produces polarization
profiles with a two peaks structure. Hence, the time interval between them
gives an important observable quantity directly related to the size of the
internal cavity and to the model parameters of the lens system.} We show that
{during a microlensing event} the expected polarization variability can solve
an ambiguity, that arises in some cases, related to the binary or planetary
lensing interpretation of the perturbations observed near the maximum of the
event light-curve. We consider a specific event case for which the parameter
values corresponding to the two solutions are given. Then, assuming a
polarization model for the source star, we compute the two expected
polarization profiles. The position of the two peaks appearing in the
polarization curves and the characteristic time interval between them allow us
to distinguish between the binary and planetary lens solutions.


title:
Depleted cores, multi-component fits, and structural parameter relations
  for luminous early-type galaxies

abstract:
  New surface brightness profiles from 26 early-type galaxies with partially
depleted cores have been extracted from the full radial extent of HST images,
giving us a total sample of 31 such core-Sersic galaxies. We have carefully
quantified the radial stellar distributions of the elliptical galaxies using
the core-Sersic model whereas for the lenticular galaxies a core-Sersic bulge
plus an exponential disc model gives the best representation. We additionally
caution about the excessive use of multiple Sersic functions for decomposing
galaxies and compare with past fits in the literature. The structural
parameters obtained from our fitted models are in general, in good agreement
with our initial study using radially limited (R < 10") profiles, and are used
here to update several galaxy scaling relations. We find near-linear relations
between the break radius R_b and the spheroid luminosity L such that R_b ~
L^(1.13 +/- 0.13), and with the supermassive black hole mass M_BH such that R_b
~ M_BH^(0.83+/- 0.21). This is internally consistent with the notion that
major, dry mergers add the stellar and black hole mass in equal proportion,
i.e., M_BH ~ L. In addition, we observe a linear relation R_b ~ R_e^(0.98 +/-
0.15) for the core-Sersic elliptical galaxies, where R_e is the galaxies'
effective half light radii, which is collectively consistent with the
approximately-linear, bright-end of the curved L-R_e relation. Finally, we
measure accurate stellar mass deficits M_def that are in general 0.5-4 M_BH,
and we identify two galaxies (NGC 1399, NGC 5061) that, due to their high
M_def/M_BH ratio, may have experienced oscillatory core-passage by a kicked
black hole. The galaxy scaling relations and stellar mass deficits favor
core-Sersic galaxy formation through a few `dry' major merger events involving
supermassive black holes such that M_def ~ M_BH^(3.70 +/- 0.76), for M_BH > 2 X
10^8 M_sun.


title:
Constraining the Atmospheric Composition of the Day-Night Terminators of
  HD 189733b : Atmospheric Retrieval with Aerosols

abstract:
  A number of observations have shown that Rayleigh scattering by aerosols
dominates the transmission spectrum of HD 189733b at wavelengths shortward of 1
$\mu$m. In this study, we retrieve a range of aerosol distributions consistent
with transmission spectroscopy between 0.3-24 $\mu$m that were recently
re-analyzed by Pont et al. (2013). To constrain the particle size and the
optical depth of the aerosol layer, we investigate the degeneracies between
aerosol composition, temperature, planetary radius, and molecular abundances
that prevent unique solutions for transit spectroscopy. Assuming that the
aerosol is composed of MgSiO$_3$, we suggest that a vertically uniform aerosol
layer over all pressures with a monodisperse particle size smaller than about
0.1 $\mu$m and an optical depth in the range 0.002-0.02 at 1 $\mu$m provides
statistically meaningful solutions for the day/night terminator regions of HD
189733b. Generally, we find that a uniform aerosol layer provide adequate fits
to the data if the optical depth is less than 0.1 and the particle size is
smaller than 0.1 $\mu$m, irrespective of the atmospheric temperature, planetary
radius, aerosol composition, and gaseous molecules. Strong constraints on the
aerosol properties are provided by spectra at wavelengths shortward of 1 $\mu$m
as well as longward of 8 $\mu$m, if the aerosol material has absorption
features in this region. We show that these are the optimal wavelengths for
quantifying the effects of aerosols, which may guide the design of future space
observations. The present investigation indicates that the current data offer
sufficient information to constrain some of the aerosol properties of
HD189733b, but the chemistry in the terminator regions remains uncertain.


title: Power Maps on Quasi-$p$-regular SU(n)

abstract:
  In the paper we will introduce show that the $p^3$ power map on $SU(p+t-1)$
is an H-map for $2\leq t\leq p-1$. To do this we will consider a fibration
whose base space is $SU(p+t-1)$ with the property that there is a section into
the total space. We will then use decomposition methods to identify the fibre
and the map from it to the total space. This information will be used to deduce
information about $SU(p+t-1)$. In doing this we draw together recent work of
Kishimoto and Theriault with more classical work of Cohen and Neisendorfer, and
make use of the classical theorems of Hilton and Milnor, James and Barrett.


title:
Geometry and linearly polarized cavity photon effects on the charge and
  spin currents of spin-orbit interacting electrons in a quantum ring

abstract:
  We calculate the persistent spin current inside a quantum ring as a function
of the strength of the Rashba or Dresselhaus spin-orbit interaction. We provide
analytical results for the spin current of a one-dimensional (1D) ring of
non-interacting electrons for comparison. Furthermore, we calculate the time
evolution in the transient regime of a two-dimensional (2D) quantum ring
connected to electrically biased semi-infinite leads using a
time-convolutionless non-Markovian generalized master equation. In the latter
case, the electrons are correlated via the Coulomb interaction and the ring can
be embedded in a photon cavity with a single mode of linearly polarized photon
field. The electron-electron and electron-photon interactions are described by
exact numerical diagonalization. The photon field can be polarized
perpendicular or parallel to the charge transport. We find a pronounced charge
current dip associated with many-electron level crossings at the
Aharonov-Casher phase $\Delta\Phi=\pi$, which can be disguised by linearly
polarized light. Qualitative agreement is found for the spin currents of the 1D
and 2D ring. Quantatively, however, the spin currents are weaker in the more
realistic 2D ring, especially for weak spin-orbit interaction, but can be
considerably enhanced with the aid of a linearly polarized electromagnetic
field. Specific spin current symmetries relating the Dresselhaus spin-orbit
interaction case to the Rashba one are found to hold for the 2D ring in the
photon cavity.


title: Sausage Mode Propagation in a Thick Magnetic Flux Tube

abstract:
  The aim of this paper is to model the propagation of slow magnetohydrodynamic
(MHD) sausage waves in a thick expanding magnetic flux tube in the context of
the quiescent (VAL C) solar atmosphere. The propagation of these waves is found
to be described by the Klein-Gordon equation. Using the governing MHD equations
and the VAL C atmosphere model we study the variation of the cut-off frequency
along and across the magnetic tube guiding the waves. Due to the radial
variation of the cut-off frequency the flux tubes act as low frequency filters
for waves.


title: Supersymmetric flat directions and resonant gravitino production

abstract:
  We study resonant gravitino production in the early Universe in the presence
of SUSY flat directions whose large VEVs break some but not all gauge
symmetries. We find that for a large region of parameter space the gravitino
abundance is several orders of magnitude larger than the cosmological upper
bound. Since flat directions with large VEVs are generically expected in
supersymmetric theories this result further exacerbates the gravitino problem.


title: Universality of random graphs for graphs of maximum degree two

abstract:
  For a family $\mathcal{F}$ of graphs, a graph $G$ is called
\emph{$\mathcal{F}$-universal} if $G$ contains every graph in $\mathcal{F}$ as
a subgraph. Let $\mathcal{F}_n(d)$ be the family of all graphs on $n$ vertices
with maximum degree at most $d$. Dellamonica, Kohayakawa, R\"odl and Ruci\'nski
showed that, for $d\geq 3$, the random graph $G(n,p)$ is
$\mathcal{F}_n(d)$-universal with high probability provided $p\geq
C\big(\frac{\log n}{n}\big)^{1/d}$ for a sufficiently large constant $C=C(d)$.
In this paper we prove the missing part of the result, that is, the random
graph $G(n,p)$ is $\mathcal{F}_n(2)$-universal with high probability provided
$p\geq C\big(\frac{\log n}{n}\big)^{1/2}$ for a sufficiently large constant
$C$.