title:
Bias Correction of Persistence Measures in Fractionally Integrated
  Models

abstract:
  This paper investigates the accuracy of bootstrap-based bias correction of
persistence measures for long memory fractionally integrated processes. The
bootstrap method is based on the semi-parametric sieve approach, with the
dynamics in the long memory process captured by an autoregressive
approximation. With a view to improving accuracy, the sieve method is also
applied to data pre-filtered by a semi-parametric estimate of the long memory
parameter. Both versions of the bootstrap technique are used to estimate the
finite sample distributions of the sample autocorrelation coefficients and the
impulse response coefficients and, in turn, to bias-adjust these statistics.
The accuracy of the resultant estimators in the case of the autocorrelation
coefficients is also compared with that yielded by analytical bias adjustment
methods when available. The basic sieve technique is seen to yield a reduction
in the bias of both persistence measures. The pre-filtered sieve produces a
substantial further reduction in the bias of the estimated impulse response
function, whilst the extra improvement yielded by pre-filtering in the case of
the sample autocorrelation function is shown to depend heavily on the accuracy
of the pre-filter.


title:
Une m\'ethode pour caract\'eriser les communaut\'es des r\'eseaux
  dynamiques \`a attributs

abstract:
  Many complex systems are modeled through complex networks whose analysis
reveals typical topological properties. Amongst those, the community structure
is one of the most studied. Many methods are proposed to detect communities,
not only in plain, but also in attributed, directed or even dynamic networks. A
community structure takes the form of a partition of the node set, which must
then be characterized relatively to the properties of the studied system. We
propose a method to support such a characterization task. We define a
sequence-based representation of networks, combining temporal information,
topological measures, and nodal attributes. We then characterize communities
using the most representative emerging sequential patterns of its nodes. This
also allows detecting unusual behavior in a community. We describe an empirical
study of a network of scientific collaborations.---De nombreux syst\`emes
complexes sont \'etudi\'es via l'analyse de r\'eseaux dits complexes ayant des
propri\'et\'es topologiques typiques. Parmi cellesci, les structures de
communaut\'es sont particuli\`erement \'etudi\'ees. De nombreuses m\'ethodes
permettent de les d\'etecter, y compris dans des r\'eseaux contenant des
attributs nodaux, des liens orient\'es ou \'evoluant dans le temps. La
d\'etection prend la forme d'une partition de l'ensemble des noeuds, qu'il faut
ensuite caract\'eriser relativement au syst\`eme mod\'elis\'e. Nous travaillons
sur l'assistance \`a cette t\^ache de caract\'erisation. Nous proposons une
repr\'esentation des r\'eseaux sous la forme de s\'equences de descripteurs de
noeuds, qui combinent les informations temporelles, les mesures topologiques,
et les valeurs des attributs nodaux. Les communaut\'es sont caract\'eris\'ees
au moyen des motifs s\'equentiels \'emergents les plus repr\'esentatifs issus
de leurs noeuds. Ceci permet notamment la d\'etection de comportements
inhabituels au sein d'une communaut\'e. Nous d\'ecrivons une \'etude empirique
sur un r\'eseau de collaboration scientifique.


title:
Exchange fluctuation theorems for a chain of interacting particles in
  presence of two heat baths

abstract:
  The exchange fluctuation theorem for heat exchanged between two systems at
different temperatures, when kept in direct contact, has been investigated by
C. Jarzynski and D. K. W\'ojcik, in Phys. Rev. Lett. {\bf 92}, 230602 (2004).
We extend this result to the case where two Langevin reservoirs at different
temperatures are connected via a conductor made of interacting particles, and
are subjected to an external drive or work source. The Langevin reservoirs are
characterized by Gaussian white noise fluctuations and concomitant friction
coefficients. We first derive the Crooks theorem for the ratio between forward
and reverse paths, and discuss the first law in this model. Then we derive the
modified detailed fluctuation theorems (MDFT) for the heat exchanged at each
end. These theorems differ from the usual form of the detailed fluctuation
theorems (DFT) in literature, due the presence of an extra multiplicative
factor. This factor quantifies the deviation of our MFDT from the DFT. Finally,
we numerically study our model, with only two interacting particles for
simplicity.


title: Simple, compact and robust approximate string dictionary

abstract:
  This paper is concerned with practical implementations of approximate string
dictionaries that allow edit errors. In this problem, we have as input a
dictionary $D$ of $d$ strings of total length $n$ over an alphabet of size
$\sigma$. Given a bound $k$ and a pattern $x$ of length $m$, a query has to
return all the strings of the dictionary which are at edit distance at most $k$
from $x$, where the edit distance between two strings $x$ and $y$ is defined as
the minimum-cost sequence of edit operations that transform $x$ into $y$. The
cost of a sequence of operations is defined as the sum of the costs of the
operations involved in the sequence. In this paper, we assume that each of
these operations has unit cost and consider only three operations: deletion of
one character, insertion of one character and substitution of a character by
another. We present a practical implementation of the data structure we
recently proposed and which works only for one error. We extend the scheme to
$2\leq k<m$. Our implementation has many desirable properties: it has a very
fast and space-efficient building algorithm. The dictionary data structure is
compact and has fast and robust query time. Finally our data structure is
simple to implement as it only uses basic techniques from the literature,
mainly hashing (linear probing and hash signatures) and succinct data
structures (bitvectors supporting rank queries).


title:
Confronting DGP Braneworld Gravity with Cosmic Observations after Planck
  Data

abstract:
  The normal branch of Dvali-Gabadadze-Porrati braneworld gravity with brane
tension is confronted by the currently available cosmic observations from the
geometrical and dynamical perspectives. On the geometrical side, the type Ia
supernova as standard candle, the baryon acoustic oscillation as standard ruler
and the cosmic microwave background measurement from the first released 15.5
months data were used to fix the background evolutions. On the dynamical side,
the redshift space distortion data will be used to determine the evolution of
the matter perturbation. Through a Markov chain Monte Carlo analysis, we found
the dimensionless crossover scale
$\Omega_{r_c}=1/(4H^2_0r^2_{c})=0.00183_{-0.00183}^{+0.000338}$ in a spatially
flat normal branch of Dvali-Gabadadze-Porrati braneworld. This result suggests
that the crossover scale $r_c$ should be around $12H^{-1}_0$ which is
consistent with the previous result $r_c>3H^{-1}_0$ and greater. It also
implies that the five-dimensional gravity effect is weak to be observed in
$H^{-1}_0$ scale.


title:
First bolometric measurement of the two neutrino double beta decay of
  $^{100}$Mo with a ZnMoO$_4$ crystals array

abstract:
  The large statistics collected during the operation of a ZnMoO$_4$ array, for
a total exposure of 1.3 kg $\cdot$ day of $^{100}$Mo, allowed the first
bolometric observation of the two neutrino double beta decay of $^{100}$Mo. The
observed spectrum of each crystal was reconstructed taking into account the
different background contributions due to environmental radioactivity and
internal contamination. The analysis of coincidences between the crystals
allowed the assignment of constraints to the intensity of the different
background sources, resulting in a reconstruction of the measured spectrum down
to an energy of $\sim$300 keV. The half-life extracted from the data is
T$_{1/2}^{2\nu}$= [7.15 $\pm$ 0.37 (stat) $\pm$ 0.66 (syst)] $\cdot$ 10$^{18}$
y.


title: Strong forms of self-duality for Hopf monoids in species

abstract:
  A vector species is a functor from the category of finite sets with
bijections to vector spaces (over a fixed field); informally, one can view this
as a sequence of $S_n$-modules. A Hopf monoid (in the category of vector
species) consists of a vector species with unit, counit, product, and coproduct
morphisms satisfying several compatibility conditions, analogous to a graded
Hopf algebra. A vector species has a basis if and only if it is given by a
sequence of $S_n$-modules which are permutation representations. We say that a
Hopf monoid is freely self-dual if it is connected and finite-dimensional, and
if it has a basis in which the structure constants of its product and coproduct
coincide. Such Hopf monoids are self-dual in the usual sense, and we show that
they are furthermore both commutative and cocommutative. We prove more specific
classification theorems for freely self-dual Hopf monoids whose products
(respectively, coproducts) are linearized in the sense that they preserve the
basis; we call such Hopf monoids strongly self-dual (respectively, linearly
self-dual). In particular, we show that every strongly self-dual Hopf monoid
has a basis isomorphic to some species of block-labeled set partitions, on
which the product acts as the disjoint union. In turn, every linearly self-dual
Hopf monoid has a basis isomorphic to the species of maps to a fixed set, on
which the coproduct acts as restriction. It follows that every linearly
self-dual Hopf monoid is strongly self-dual. Our final results concern
connected Hopf monoids which are finite-dimensional, commutative, and
cocommutative. We prove that such a Hopf monoid has a basis in which its
product and coproduct are both linearized if and only if it is strongly
self-dual with respect to a basis equipped with a certain partial order,
generalizing the refinement partial order on set partitions.


title:
Toward quantized Picard-Vessiot theory, Further observations on our
  previous example

abstract:
  It is quite natural to wonder whether there is a difference-differential
equations, the Galois group of which is a quantum group that is neither
commutative nor co-commutative. Believing that there was no such linear
equations, we explored non-linear equations and discovered a such equation. We
show that the example is related with a linear equation. We treat only one
charming example. It is not, however, an isolated example. We open a window
that allows us to have a look at a quantized Picard-Vessiot theory.


title:
The mass distribution of clumps within infrared dark clouds. A Large
  APEX Bolometer Camera study

abstract:
  We present an analysis of the dust continuum emission at 870 um in order to
investigate the mass distribution of clumps within infrared dark clouds
(IRDCs). We map six IRDCs with the Large APEX BOlometer CAmera (LABOCA) at
APEX, reaching an rms noise level of 28-44 mJy/beam. The dust continuum
emission coming from these IRDCs was decomposed by using two automated
algorithms, Gaussclumps and Clumpfind. Moreover, we carried out single-pointing
observations of the N_2H^+ (3-2) line toward selected positions to obtain
kinematic information. The mapped IRDCs are located in the range of kinematic
distances of 2.7-3.2 kpc. We identify 510 and 352 sources with Gaussclumps and
Clumpfind, respectively, and estimate masses and other physical properties
assuming a uniform dust temperature. The mass ranges are 6-2692 Msun
(Gaussclumps) and 7-4254 Msun (Clumpfind) and the ranges in effective radius
are around 0.10-0.74 pc (Gaussclumps) and 0.16-0.99 pc (Clumpfind). The mass
distribution, independent of the decomposition method used, is fitted by a
power law, dN/dM propto M^alpha, with an index of -1.60 +/- 0.06, consistent
with the CO mass distribution and other high-mass star-forming regions.


title: Interstellar water chemistry: from laboratory to observations

abstract:
  Water is observed throughout the universe, from diffuse interstellar clouds
to protoplanetary disks around young stars, and from comets in our own solar
system and exoplanetary atmospheres to galaxies at high redshifts. This review
summarizes the spectroscopy and excitation of water in interstellar space as
well as the basic chemical processes that form and destroy water under
interstellar conditions. Three major routes to water formation are identified:
low temperature ion-molecule chemistry, high-temperature neutral-neutral
chemistry and gas-ice chemistry. The rate coefficients of several important
processes entering the networks are discussed in detail; several of them have
been determined only in the last decade through laboratory experiments and
theoretical calculations. Astronomical examples of each of the different
chemical routes are presented using data from powerful new telescopes, in
particular the Herschel Space Observatory. Basic chemical physics studies
remain critically important to analyze astronomical data.


title: Evolution algebras and graphs

abstract:
  A digraph is attached to any evolution algebra. This graph leads to some new
purely algebraic results on this class of algebras and allows for some new
natural proofs of known results. Nilpotency of an evolution algebra will be
proved to be equivalent to the nonexistence of oriented cycles in the graph.
Besides, the automorphism group of any evolution algebra $E$ with $E=E^2$ will
be shown to be always finite.


title: Finite-frequency-dependent noise of a quantum dot in a magnetic field

abstract:
  We present a detailed study for the finite-frequency current noise of a Kondo
quantum dot in presence of a magnetic field by using a recently developed real
time functional renormalization group approach [Phys. Rev. B $\mathbf{83}$,
201303(R) (2011)]. The scaling equations are modified in an external magnetic
field; the couplings and non-local current vertices become strongly
anisotropic, and develop new singularities. Consequently, in addition to the
natural emission threshold frequency, $\hbar\omega = |eV|$, a corresponding
singular behavior is found to emerge in the noise spectrum at frequencies
$\hbar \omega \approx |eV\pm B|$. The predicted singularities are measurable
with present-day experimental techniques.


title:
Strongly three-dimensional electronic structure and Fermi Surfaces of
  SrFe$_{2}$(As$_{0.65}$P$_{0.35}$)$_{2}$: Comparison with
  BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$

abstract:
  The isovalent-substituted iron-pnictide superconductor
SrFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ ($x$=0.35) has a slightly higher optimum
critical temperature than the similar system
BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$, and its parent compound SrFe$_{2}$As$_{2}$
has a much higher N\'eel temperature than BaFe$_{2}$As$_{2}$. We have studied
the band structure and the Fermi surfaces of optimally-doped
SrFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$ by angle-resolved photoemission
spectroscopy (ARPES). Three holelike Fermi surfaces (FSs) around (0,0) and two
electronlike FSs around ($\pi$,$\pi$) have been observed as in the case of
BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$. Measurements with different photon
energies have revealed that one of the hole FSs is more strongly warped along
the $k_{z}$ direction than the corresponding one in
BaFe(As$_{1-x}$P$_{x}$)$_{2}$, while the electron FSs are almost cylindrical
unlike corrugated ones in BaFe(As$_{1-x}$P$_{x}$)$_{2}$. Comparison of the
ARPES data with first-principles band-structure calculation revealed that the
quasiparticle mass renormalization factors are different not only between bands
of different orbital character but also between the hole and electron FSs of
the same orbital character. By examining nesting conditions between the hole
and electron FSs, we conclude that magnetic interactions between FeAs layers
rather than FS nesting play an important role in stabilizing the
antiferromagnetic order. The insensitivity of superconductivity to the FS
nesting can be explained if only the $d_{xy}$ and/or $d_{xz/yz}$ orbitals are
active in inducing superconductivity or if FS nesting is not important for
superconductivity.


title: Towards analytic $(g-2)_\mu$ at four loops

abstract:
  In this contribution we present recent four-loop results for the muon
anomalous magnetic moment based on analytic methods. In particular, fermionic
corrections involving two or more closed electron loops or at least one tau
lepton loop are discussed.


title:
Strong-coupling study of spin-1 bosons in square and triangular optical
  lattice

abstract:
  We examine the superfluid-Mott insulator (SF-MI) transition of
antiferromagnetically interacting spin-1 bosons trapped in a square or
triangular optical lattice. We perform a strong-coupling expansion up to the
third order in the transfer integral $t$ between the nearest-neighbor lattices.
As expected from previous studies, an MI phase with an even number of bosons is
considerably more stable against the SF phase than it is with an odd number of
bosons. Results for the triangular lattice are similar to those for the square
lattice, which suggests that the lattice geometry does not strongly affect the
stability of the MI phase against the SF phase.


title:
Astrophysical radiative neutron capture on 10B taking into account
  resonance at 475 keV

abstract:
  The possibility of the description of the available experimental data for
cross sections of the neutron capture reaction on 10B at thermal and
astrophysical energies, taking into account the resonance at 475 keV, was
considered within the framework of the modified potential cluster model with
forbidden states and accounting for the resonance behavior of the scattering
phase shifts.


title: On asymptotic distributions of weighted sums of periodograms

abstract:
  We establish asymptotic normality of weighted sums of periodograms of a
stationary linear process where weights depend on the sample size. Such sums
appear in numerous statistical applications and can be regarded as a
discretized versions of quadratic forms involving integrals of weighted
periodograms. Conditions for asymptotic normality of these weighted sums are
simple, minimal, and resemble Lindeberg-Feller condition for weighted sums of
independent and identically distributed random variables. Our results are
applicable to a large class of short, long or negative memory processes. The
proof is based on sharp bounds derived for Bartlett type approximation of these
sums by the corresponding sums of weighted periodograms of independent and
identically distributed random variables.


title:
An error event sensitive trade-off between rate and coding gain in MIMO
  MAC

abstract:
  This work considers space-time block coding for the Rayleigh fading
multiple-input multiple-output (MIMO) multiple access channel (MAC). If we
suppose that the receiver is performing joint maximum-likelihood (ML) decoding,
optimizing a MIMO MAC code against a fixed error event leads to a situation
where the joint codewords of the users in error can be seen as a single user
MIMO code. In such a case pair-wise error probability (PEP) based determinant
criterion of Tarokh et al. can be used to upper bound the error probability.
  It was already proven by Lahtonen et al. that irrespective of the used codes
the determinants of the differences of codewords of the overall codematrices
will decay as a function of the rates of the users.
  This work will study this decay phenomenon further and derive upper bounds
for the decay of determinants corresponding any error event. Lower bounds for
the optimal decay are studied by constructions based on algebraic number theory
and Diophantine approximation. For some error profiles the constructed codes
will be proven to be optimal.
  While the perspective of the paper is that of PEP, the final part of the
paper proves how the achieved decay results can be turned into statements about
the diversity-multiplexing gain trade-off (DMT).


title: Non-Hermitian quantum rings

abstract:
  We investigate the spectral and dynamical properties of a quantum particle
constrained on a ring threaded by a magnetic flux in presence of a complex
(non-Hermitian) potential. For a static magnetic flux, the quantum states of
the particle on the ring can be mapped into the Bloch states of a complex
crystal, and magnetic flux tuning enables to probe the spectral features of the
complex crystal, including the appearance of exceptional points. For a
time-varying (linearly-ramped) magnetic flux, Zener tunneling among energy
states is realized owing to the induced electromotive force. As compared to the
Hermitian case, striking effects are observed in the non-Hermitian case, such
as a highly asymmetric behavior of particle motion when reversing the direction
of the magnetic flux and field-induced delayed transparency.


title:
High-temperature thermoelectric properties of novel layered
  bismuth-sulfide LaO1-xFxBiS2

abstract:
  We have investigated the high-temperature thermoelectric properties of the
layered compound LaO1-xFxBiS2. The electrical resistivity of LaOBiS2 showed an
anomalous behavior; a metal-semiconductor transition was observed around 270 K.
It was found that the value of the electrical resistivity decreased with F
substitution. The Seebeck coefficient decreased with increasing F
concentration. The highest power factor of 1.9 W/cmK2 at 480 C was obtained for
LaOBiS2.


title:
Sparse, complex-valued representations of natural sounds learned with
  phase and amplitude continuity priors

abstract:
  Complex-valued sparse coding is a data representation which employs a
dictionary of two-dimensional subspaces, while imposing a sparse, factorial
prior on complex amplitudes. When trained on a dataset of natural image
patches, it learns phase invariant features which closely resemble receptive
fields of complex cells in the visual cortex. Features trained on natural
sounds however, rarely reveal phase invariance and capture other aspects of the
data. This observation is a starting point of the present work. As its first
contribution, it provides an analysis of natural sound statistics by means of
learning sparse, complex representations of short speech intervals. Secondly,
it proposes priors over the basis function set, which bias them towards
phase-invariant solutions. In this way, a dictionary of complex basis functions
can be learned from the data statistics, while preserving the phase invariance
property. Finally, representations trained on speech sounds with and without
priors are compared. Prior-based basis functions reveal performance comparable
to unconstrained sparse coding, while explicitely representing phase as a
temporal shift. Such representations can find applications in many perceptual
and machine learning tasks.


title:
Nuclear matter response function with a central plus tensor Landau
  interaction

abstract:
  We present a method to obtain response functions in the random phase
approximation (RPA) based on a residual interaction described in terms of
Landau parameters with central plus tensor contributions. The response
functions keep the explicit momentum dependence of the RPA, in contrast with
the traditional Landau approximation. Results for symmetric nuclear matter and
pure neutron matter are presented using Landau parameters derived from
finite-range interactions, both phenomenological and microscopic. We study the
convergence of response functions as the number of Landau parameters is
increased.


title:
Transition-type change between an inverted
  Berezinskii-Kosterlitz-Thouless transition and an abrupt transition in the
  bond percolation on a random hierarchical small-world network

abstract:
  We study bond percolation on a one-parameter family of hierarchical
small-world network, and find a meta-transition between the inverted BKT
transition and the abrupt transition driven by changing the network topology.
It is found that the order parameter is continuous and fractal exponent is
discontinuous in the inverted BKT transition, and oppositely, the former is
discontinuous and the latter is continuous in the abrupt transition. The gaps
of the order parameter and fractal exponent in each transition go to vanish as
approaching the meta-transition point. This point corresponds to a marginal
power-law transition. In the renormalization group formalism, this
meta-transition corresponds to the transition between transcritical and
saddle-node bifurcations of the fixed point via a pitchfork bifurcation.


title:
Graphics processing units accelerated semiclassical initial value
  representation molecular dynamics

abstract:
  This paper presents a Graphics Processing Units (GPUs) implementation of the
Semiclassical Initial Value Representation (SC-IVR) propagator for vibrational
molecular spectroscopy calculations. The time-averaging formulation of the
SC-IVR for power spectrum calculations is employed. Details about the GPU
implementation of the semiclassical code are provided. Four molecules with an
increasing number of atoms are considered and the GPU-calculated vibrational
frequencies perfectly match the benchmark values. The computational time
scaling of two GPUs (NVIDIA Tesla C2075 and Kepler K20) respectively versus two
CPUs (Intel Core i5 and Intel Xeon E5-2687W) and the critical issues related to
the GPU implementation are discussed. The resulting reduction in computational
time and power consumption is significant and semiclassical GPU calculations
are shown to be environment friendly.


title:
piBUSS: a parallel BEAST/BEAGLE utility for sequence simulation under
  complex evolutionary scenarios

abstract:
  Background: Simulated nucleotide or amino acid sequences are frequently used
to assess the performance of phylogenetic reconstruction methods. BEAST, a
Bayesian statistical framework that focuses on reconstructing time-calibrated
molecular evolutionary processes, supports a wide array of evolutionary models,
but lacked matching machinery for simulation of character evolution along
phylogenies.
  Results: We present a flexible Monte Carlo simulation tool, called piBUSS,
that employs the BEAGLE high performance library for phylogenetic computations
within BEAST to rapidly generate large sequence alignments under complex
evolutionary models. piBUSS sports a user-friendly graphical user interface
(GUI) that allows combining a rich array of models across an arbitrary number
of partitions. A command-line interface mirrors the options available through
the GUI and facilitates scripting in large-scale simulation studies. Analogous
to BEAST model and analysis setup, more advanced simulation options are
supported through an extensible markup language (XML) specification, which in
addition to generating sequence output, also allows users to combine simulation
and analysis in a single BEAST run.
  Conclusions: piBUSS offers a unique combination of flexibility and
ease-of-use for sequence simulation under realistic evolutionary scenarios.
Through different interfaces, piBUSS supports simulation studies ranging from
modest endeavors for illustrative purposes to complex and large-scale
assessments of evolutionary inference procedures. The software aims at
implementing new models and data types that are continuously being developed as
part of BEAST/BEAGLE.


title:
A Theory of Stationary Trees and the Balanced
  Baumgartner-Hajnal-Todorcevic Theorem for Trees

abstract:
  Building on early work by Stevo Todorcevic, we describe a theory of
stationary subtrees of trees of successor-cardinal height. We define the
diagonal union of subsets of a tree, as well as normal ideals on a tree, and we
characterize arbitrary subsets of a non-special tree as being either stationary
or non-stationary.
  We then use this theory to prove the following partition relation for trees:
  Main Theorem: Let $\kappa$ be any infinite regular cardinal, let $\xi$ be any
ordinal such that $2^{\left|\xi\right|} < \kappa$, and let $k$ be any natural
number. Then \[ \text{non-$\left(2^{<\kappa}\right)$-special tree } \to
\left(\kappa + \xi \right)^2_k. \]
  This is a generalization to trees of the Balanced
Baumgartner-Hajnal-Todorcevic Theorem, which we recover by applying the above
to the cardinal $(2^{<\kappa})^+$, the simplest example of a
non-$(2^{<\kappa})$-special tree.
  As a corollary, we obtain a general result for partially ordered sets:
  Theorem: Let $\kappa$ be any infinite regular cardinal, let $\xi$ be any
ordinal such that $2^{\left|\xi\right|} < \kappa$, and let $k$ be any natural
number. Let $P$ be a partially ordered set such that $P \to
(2^{<\kappa})^1_{2^{<\kappa}}$. Then \[ P \to \left(\kappa + \xi \right)^2_k.
\]


title:
Defect ordering and defect-domain wall interactions in PbTiO$_3$: A
  first-principles study

abstract:
  The properties of ferroelectric materials, such as lead zirconate titanate
(PZT), are heavily influenced by the interaction of defects with domain walls.
These defects are either intrinsic, or are induced by the addition of dopants.
We study here PbTiO$_3$ (the end member of a key family of solid solutions) in
the presence of acceptor (Fe) and donor (Nb) dopants, and the interactions of
the different defects and defect associates with the domain walls. For the case
iron acceptors, the calculations point to the formation of defect associates
involving an iron substitutional defect and a charged oxygen vacancy
(Fe$^{'}_{Ti}$-V$^{^{\textbf{..}}}_O$). This associate exhibits a strong
tendency to align in the direction of the bulk polarization; in fact, ordering
of defects is also observed in pure PbTiO$_3$ in the form of lead-oxygen
divacancies. Conversely, calculations on donor-doped PbTiO$_3$ do not indicate
the formation of polar defect complexes involving donor substitutions. Last, it
is observed that both isolated defects in donor-doped materials and defect
associates in acceptor-doped materials are more stable at 180$^o$ domain walls.
However, polar defect complexes lead to asymmetric potentials at domain walls
due to the interaction of the defect polarization with the bulk polarization.
The relative pinning characteristics of different defects are then compared, to
develop an understanding of defect-domain wall interactions in both doped and
pure PbTiO$_3$. These results may also help understanding hardening and
softening mechanisms in PZT.


title: A linear mass Vaidya metric at the end of black hole evaporation

abstract:
  We discuss the near singularity region of the linear mass Vaidya metric for
massless particles with non-zero angular momentum. In particular we look at
massless geodesics with non-zero angular momentum near the vanishing point of a
special subclass of linear mass Vaidya metrics. We also investigate this same
structure in the numerical solutions for the scattering of massless scalars
from the singularity. Finally we make some comments on the possibility of using
this metric as a semi-classical model for the end-point of black hole
evaporation.


title: Sphere-level Ramond-Ramond couplings in Ramond-Neveu-Schwarz formalism

abstract:
  We calculate in details the sphere-level scattering amplitude of two
Ramond-Ramond (RR) and two Neveu-Schwarz-Neveu-Schwarz (NSNS) vertex operators
in type II superstring theories in Ramond-Neveu-Schwarz (RNS) formalism. We
then compare the expansion of this amplitude at order $\alpha'^3$ with the
eight-derivative couplings of the gravity and B-field that have been recently
found based on S-dual and T-dual Ward identities. We find exact agreement.
Moreover, using the above S-matrix element, we have found various couplings
involving the dilaton field, and shown that they are also fully consistent with
these Ward identities.


title:
RDF Translator: A RESTful Multi-Format Data Converter for the Semantic
  Web

abstract:
  The interdisciplinary nature of the Semantic Web and the many projects put
forward by the community led to a large number of widely accepted serialization
formats for RDF. Most of these RDF syntaxes have been developed out of a
necessity to serve specific purposes better than existing ones, e.g. RDFa was
proposed as an extension to HTML for embedding non-intrusive RDF statements in
human-readable documents. Nonetheless, the RDF serialization formats are
generally transducible among themselves given that they are commonly based on
the RDF model. In this paper, we present (1) a RESTful Web service based on the
HTTP protocol that translates between different serializations. In addition to
its core functionality, our proposed solution provides (2) features to
accommodate frequent needs of Semantic Web developers, namely a straightforward
user interface with copy-to-clipboard functionality, syntax highlighting,
persistent URI links for easy sharing, cool URI patterns, and content
negotiation using respective HTTP headers. We demonstrate the benefit of our
converter by presenting two use cases.


title: Creation of electron-positron plasma with superstrong laser field

abstract:
  We present a short review of recent progress in studying QED effects of
interaction of ultra-relativistic laser pulses with vacuum and $e^-e^+$ plasma.
The development of laser technologies promises very rapid growth of laser
intensities in close future already. Two exawatt class facilities (ELI and
XCELS, Russia) in Europe are already in the planning stage. Realization of
these projects will make available a laser of intensity $\sim 10^{26}$W/cm$^2$
or even higher. Therefore, discussion of nonlinear optical effects in vacuum
are becoming urgent for experimentalists and are currently gaining much
attention. We show that, in spite of the fact that the respective field
strength is still essentially less than $E_S=m^2c^3/e\hbar=1.32\cdot
10^{16}$V/cm, the nonlinear vacuum effects will be accessible for observation
at ELI and XCELS facilities. The most promissory for observation is the effect
of pair creation by laser pulse in vacuum. It is shown, that at intensities
$\sim 5\cdot 10^{25}$W/cm$^2$, creation even of a single pair is accompanied by
development of an avalanchelike QED cascade. There exists an important
distinctive feature of the laser-induced cascades, as compared with the air
showers arising due to primary cosmic ray entering the atmosphere. In our case
the laser field plays not only the role of a target (similar to a nucleus in
the case of air showers). It is responsible also for acceleration of slow
particles. It is shown that the effect of pair creation imposes a natural limit
for attainable laser intensity. Apparently, the field strength $E\sim E_S$ is
not accessible for pair creating electromagnetic field at all.


title: Designing Spontaneous Speech Search Interface for Historical Archives

abstract:
  Spontaneous speech in the form of conversations, meetings, voice-mail,
interviews, oral history, etc. is one of the most ubiquitous forms of human
communication. Search engines providing access to such speech collections have
the potential to better inform intelligence and make relevant data over vast
audio/video archives available to users. This project presents a search user
interface design supporting search tasks over a speech collection consisting of
an historical archive with nearly 52,000 audiovisual testimonies of survivors
and witnesses of the Holocaust and other genocides. The design incorporates
faceted search, along with other UI elements like highlighted search items,
tags, snippets, etc., to promote discovery and exploratory search. Two
different designs have been created to support both manual and automated
transcripts. Evaluation was performed using human subjects to measure accuracy
in retrieving results, understanding user-perspective on the design elements,
and ease of parsing information.


title:
The Multiple Instances of Node Centrality and their Implications on the
  Vulnerability of ISP Networks

abstract:
  The position of the nodes within a network topology largely determines the
level of their involvement in various networking functions. Yet numerous node
centrality indices, proposed to quantify how central individual nodes are in
this respect, yield very different views of their relative significance. Our
first contribution in this paper is then an exhaustive survey and
categorization of centrality indices along several attributes including the
type of information (local vs. global) and processing complexity required for
their computation. We next study the seven most popular of those indices in the
context of Internet vulnerability to address issues that remain under-explored
in literature so far. First, we carry out a correlation study to assess the
consistency of the node rankings those indices generate over ISP router-level
topologies. For each pair of indices, we compute the full ranking correlation,
which is the standard choice in literature, and the percentage overlap between
the k top nodes. Then, we let these rankings guide the removal of highly
central nodes and assess the impact on both the connectivity properties and
traffic-carrying capacity of the network. Our results confirm that the top-k
overlap predicts the comparative impact of indices on the network vulnerability
better than the full-ranking correlation. Importantly, the locally computed
degree centrality index approximates closely the global indices with the most
dramatic impact on the traffic-carrying capacity; whereas, its approximative
power in terms of connectivity is more topology-dependent.


title:
Understanding the role of ions and water molecules in the NaCl
  dissolution process

abstract:
  The dissolution of NaCl in water is one of the most common everyday
processes, yet it remains poorly understood at the molecular level. Here we
report the results of an extensive density functional theory study in which the
initial stages of NaCl dissolution have been examined at low water coverages.
Our specific approach is to study how the energetic cost of moving an ion or a
pair of ions to a less coordinated site at the surface of various NaCl crystals
varies with the number of water molecules adsorbed on the surface. This
"microsolvation" approach allows us to study the dependence of the defect
energies on the number of water molecules in the cluster and thus to establish
when and where dissolution becomes favorable. Moreover, this approach allows us
to understand the roles of the individual ions and water molecules in the
dissolution process. Consistent with previous work we identify a clear
preference for dissolution of Cl ions over Na ions. However, the detailed
information obtained here leads to the conclusion that the process is governed
by the higher affinity of the water molecules to Na ions than to Cl ions. The
Cl ions are released first as this exposes more Na ions at the surface creating
favorable adsorption sites for water. We discuss how this mechanism is likely
to be effective for other alkali halides.


title: Zitterbewegung of electrons in carbon nanotubes created by laser pulses

abstract:
  We describe a possibility of creating non-stationary electron wave packets in
zigzag carbon nanotubes (CNT) illuminated by short laser pulses. After
disappearance of the pulse the packet experiences the trembling motion
(Zitterbewegung, ZB). The band structure of CNT is calculated using the
tight-binding approximation generalized for the presence of radiation.
Employing realistic pulse and CNT parameters we obtain the ZB oscillations with
inter-band frequencies corresponding to specific pairs of energy bands. A
choice of optimal parameters is presented in order to observe the phenomenon of
ZB experimentally. The use of Gaussian wave packets to trigger the electron
Zitterbewegung, as used in the literature, is critically reexamined.


title: Markov Network Structure Learning via Ensemble-of-Forests Models

abstract:
  Real world systems typically feature a variety of different dependency types
and topologies that complicate model selection for probabilistic graphical
models. We introduce the ensemble-of-forests model, a generalization of the
ensemble-of-trees model. Our model enables structure learning of Markov random
fields (MRF) with multiple connected components and arbitrary potentials. We
present two approximate inference techniques for this model and demonstrate
their performance on synthetic data. Our results suggest that the
ensemble-of-forests approach can accurately recover sparse, possibly
disconnected MRF topologies, even in presence of non-Gaussian dependencies
and/or low sample size. We applied the ensemble-of-forests model to learn the
structure of perturbed signaling networks of immune cells and found that these
frequently exhibit non-Gaussian dependencies with disconnected MRF topologies.
In summary, we expect that the ensemble-of-forests model will enable MRF
structure learning in other high dimensional real world settings that are
governed by non-trivial dependencies.


title: On the isothermal geometry of corrugated graphene sheets

abstract:
  Variational geometries describing corrugated graphene sheets are proposed.
The isothermal thermomechanical properties of these sheets are described by a
2-dimensional Weyl space. The equation that couples the Weyl geometry with
isothermal distributions of the temperature of graphene sheets, is formulated.
This material space is observed in a 3-dimensional orthogonal configurational
point space as regular surfaces which are endowed with a thermal state vector
field fulfilling the isothermal thermal state equation. It enables to introduce
a non-topological dimensionless thermal shape parameter of non-developable
graphene sheets. The properties of the congruence of lines generated by the
thermal state vector field are discussed.


title:
Hurwitz zeta and Euler-Zagier-Hurwitz type of double zeta distributions
  and real zeros of these zeta functions

abstract:
  In this paper, we give Hurwitz zeta distributions with $0 < \sigma \ne 1$ by
using the Gamma function. During the proof process, we show that the Hurwitz
zeta function $\zeta (\sigma,a)$ does not vanish for all $0 <\sigma <1$ if and
only if $a \ge 1/2$. Next we define Euler-Zagier-Hurwitz type of double zeta
distributions not only in the region of absolute convergence but also the
outside of the region of absolute convergence. Moreover, we show that the
Euler-Zagier-Hurwitz type of double zeta function $\zeta_2
(\sigma_1,\sigma_2\,;a)$ does not vanish when $0<\sigma_1<1$, $\sigma_2>1$ and
$1<\sigma_1+\sigma_2<2$ if and only if $a \ge 1/2$.


title: Negative drag in nonequilibrium polariton quantum fluids

abstract:
  The possibility of a negative drag force on a defect in nonequilibrium
polariton quantum fluids is presented. We relate this phenomenon to the
selective parametric amplification of the waves scattered by the defect. This
leads to the prediction that mobile defects acquire a non-zero velocity with
respect to the polariton nonequilibrium fluid. We derive a direct relation
between the drag force and the momentum distribution of the fluid, that allows
for the experimental verification of our predictions.


title: The Legendre Condition of the Fractional Calculus of Variations

abstract:
  Fractional operators play an important role in modeling nonlocal phenomena
and problems involving coarse-grained and fractal spaces. The fractional
calculus of variations with functionals depending on derivatives and/or
integrals of noninteger order is a rather recent subject that is currently in
fast development due to its applications in physics and other sciences. In the
last decade, several approaches to fractional variational calculus were
proposed by using different notions of fractional derivatives and integrals.
Although the literature of the fractional calculus of variations is already
vast, much remains to be done in obtaining necessary and sufficient conditions
for the optimization of fractional variational functionals, existence and
regularity of solutions. Regarding necessary optimality conditions, all works
available in the literature concern the derivation of first-order fractional
conditions of Euler-Lagrange type. In this work we obtain a Legendre
second-order necessary optimality condition for weak extremizers of a
variational functional that depends on fractional derivatives.


title:
On the energy dissipation rate of solutions to the compressible
  isentropic Euler system

abstract:
  In this paper we extend and complement some recent results by Chiodaroli, De
Lellis and Kreml on the well-posedness issue for weak solutions of the
compressible isentropic Euler system in $2$ space dimensions with pressure law
$p(\rho)=\rho^\gamma$, $\gamma \geq 1$. First we show that every Riemann
problem whose one-dimensional self-similar solution consists of two shocks
admits also infinitely many two-dimensional admissible bounded weak solutions
(not containing vacuum) generated by the method of De Lellis and Sz\'ekelyhidi.
Moreover we prove that for some of these Riemann problems and for $1\leq \gamma
< 3$ such solutions have greater energy dissipation rate than the self-similar
solution emanating from the same Riemann data. We therefore show that the
maximal dissipation criterion proposed by Dafermos does not favour the
classical self-similar solutions.


title: More Classes of Complete Permutation Polynomials over $\F_q$

abstract:
  In this paper, by using a powerful criterion for permutation polynomials
given by Zieve, we give several classes of complete permutation monomials over
$\F_{q^r}$. In addition, we present a class of complete permutation
multinomials, which is a generalization of recent work.


title: The Matrix Ridge Approximation: Algorithms and Applications

abstract:
  We are concerned with an approximation problem for a symmetric positive
semidefinite matrix due to motivation from a class of nonlinear machine
learning methods. We discuss an approximation approach that we call {matrix
ridge approximation}. In particular, we define the matrix ridge approximation
as an incomplete matrix factorization plus a ridge term. Moreover, we present
probabilistic interpretations using a normal latent variable model and a
Wishart model for this approximation approach. The idea behind the latent
variable model in turn leads us to an efficient EM iterative method for
handling the matrix ridge approximation problem. Finally, we illustrate the
applications of the approximation approach in multivariate data analysis.
Empirical studies in spectral clustering and Gaussian process regression show
that the matrix ridge approximation with the EM iteration is potentially
useful.


title:
Nonadiabatic molecular dynamics simulation: An approach based on quantum
  measurement picture

abstract:
  Mixed-quantum-classical molecular dynamics simulation implies an effective
measurement on the electronic states owing to continuously tracking the atomic
forces.Based on this insight, we propose a quantum trajectory mean-field
approach for nonadiabatic molecular dynamics simulations. The new protocol
provides a natural interface between the separate quantum and classical
treatments, without invoking artificial surface hopping algorithm. Moreover, it
also bridges two widely adopted nonadiabatic dynamics methods, the Ehrenfest
mean-field theory and the trajectory surface-hopping method. Excellent
agreement with the exact results is illustrated with representative model
systems, including the challenging ones for traditional methods.


title:
The Bernstein Function: A Unifying Framework of Nonconvex Penalization
  in Sparse Estimation

abstract:
  In this paper we study nonconvex penalization using Bernstein functions.
Since the Bernstein function is concave and nonsmooth at the origin, it can
induce a class of nonconvex functions for high-dimensional sparse estimation
problems. We derive a threshold function based on the Bernstein penalty and
give its mathematical properties in sparsity modeling. We show that a
coordinate descent algorithm is especially appropriate for penalized regression
problems with the Bernstein penalty. Additionally, we prove that the Bernstein
function can be defined as the concave conjugate of a $\varphi$-divergence and
develop a conjugate maximization algorithm for finding the sparse solution.
Finally, we particularly exemplify a family of Bernstein nonconvex penalties
based on a generalized Gamma measure and conduct empirical analysis for this
family.


title: Superconducting pairing in the spin-density-wave phase of iron pnictides

abstract:
  Some of the iron pnictides show coexisting superconductivity and
spin-density-wave order. We study the superconducting pairing instability in
the spin-density-wave phase. Assuming that the pairing interaction is due to
spin fluctuations, we calculate the effective pairing interactions in the
singlet and triplet channels by summing the bubble and ladder diagrams taking
the reconstructed band structure into account. The leading pairing
instabilities and the corresponding superconducting gap structures are then
obtained from the superconducting gap equation. We illustrate this approach for
a minimal two-band model of the pnictides. Analytical and numerical results
show that the existence of propagating magnons in the spin-density-wave phase
strongly enhances the pairing in both the singlet and the spin s_z=0 triplet
channel. Over a limited parameter range, a spin s_z=0 triplet p_x-wave state is
the dominant instability. It competes with various singlet states, which have
mostly s^\pm-type structures. We analyze the effect of various symmetry-allowed
interactions on the pairing in some detail.


title:
Stellar wind interaction and pick-up ion escape of the Kepler-11
  "super-Earths"

abstract:
  We study the interactions between stellar wind and the extended
hydrogen-dominated upper atmospheres of planets and the resulting escape of
planetary pick-up ions from the 5 "super-Earths" in the compact Kepler-11
system and compare the escape rates with the efficiency of the thermal escape
of neutral hydrogen atoms. Assuming the stellar wind of Kepler-11 is similar to
the solar wind, we use a polytropic 1D hydrodynamic wind model to estimate the
wind properties at the planetary orbits. We apply a Direct Simulation Monte
Carlo Model to model the hydrogen coronae and the stellar wind plasma
interaction around Kepler-11b-f within a realistic expected heating efficiency
range of 15-40%. The same model is used to estimate the ion pick-up escape from
the XUV heated and hydrodynamically extended upper atmospheres of Kepler-11b-f.
From the interaction model we study the influence of possible magnetic moments,
calculate the charge exchange and photoionization production rates of planetary
ions and estimate the loss rates of pick-up H+ ions for all five planets. We
compare the results between the five "super-Earths" and in a more general sense
also with the thermal escape rates of the neutral planetary hydrogen atoms. Our
results show that for all Kepler-11b-f exoplanets, a huge neutral hydrogen
corona is formed around the planet. The non-symmetric form of the corona
changes from planet to planet and is defined mostly by radiation pressure and
gravitational effects. Non-thermal escape rates of pick-up ionized hydrogen
atoms for Kepler-11 "super-Earths" vary between approximately 6.4e30 1/s and
4.1e31 1/s depending on the planet's orbital location and assumed heating
efficiency. These values correspond to non-thermal mass loss rates of
approximately 1.07e7 g/s and 6.8e7 g/s respectively, which is a few percent of
the thermal escape rates.


title: Big Data Computing and Clouds: Trends and Future Directions

abstract:
  This paper discusses approaches and environments for carrying out analytics
on Clouds for Big Data applications. It revolves around four important areas of
analytics and Big Data, namely (i) data management and supporting
architectures; (ii) model development and scoring; (iii) visualisation and user
interaction; and (iv) business models. Through a detailed survey, we identify
possible gaps in technology and provide recommendations for the research
community on future directions on Cloud-supported Big Data computing and
analytics solutions.


title: Transversity effects in light meson leptoproduction

abstract:
  The light meson electroproduction is analyzed within the handbag approach. We
consider the leading-twist contribution together with the transversity effects.
We show that the transversity Generalized Parton Distributions (GPDs), $H_T$
and $\bar E_T$ are essential in the description of spin effects in the
pseudoscalar and vector meson leptoproduction.


title: Supernovae in paired galaxies

abstract:
  We investigate the influence of close neighbor galaxies on the properties of
supernovae (SNe) and their host galaxies using 56 SNe located in pairs of
galaxies with different levels of star formation (SF) and nuclear activity. The
mean distance of type II SNe from nuclei of hosts is greater by about a factor
of 2 than that of type Ibc SNe. The distributions and mean distances of SNe are
consistent with previous results compiled with the larger sample. For the first
time it is shown that SNe Ibc are located in pairs with significantly smaller
difference of radial velocities between components than pairs containing SNe Ia
and II. We consider this as a result of higher star formation rate (SFR) of
these closer systems of galaxies.


title:
On the sensitivity of directions which support Voigt wave propagation in
  infiltrated biaxial dielectric materials

abstract:
  Voigt wave propagation (VWP) was considered in a porous biaxial dielectric
material which was infiltrated with a material of refractive index $n_a$. The
infiltrated material was regarded as a homogenized composite material in the
long-wavelength regime and its constitutive parameters were estimated using the
extended Bruggeman homogenization formalism. In our numerical studies, the
directions which support VWP were found to vary by as much as $300^\circ$ per
RIU as the refractive index $n_a$ was varied. The sensitivities achieved were
acutely dependent upon the refractive index $n_a$ and the degrees of anisotropy
and dissipation of the porous biaxial material. The orientations, shapes and
sizes of the particles which constitute the infiltrating material and the
porous biaxial material exerted only a secondary influence on the maximum
sensitivities achieved. Also, for the parameter ranges considered, the degree
of porosity of the biaxial material had little effect on the maximum
sensitivities achieved. These numerical findings bode well for the possible
harnessing of VWP for optical sensing applications.


title: Identities of symmetry for higher-order generalized q-Euler polyonmials

abstract:
  In this paper, we investigate the properties of symmetry in two variables
related to multiple Euler q-l-function which interpolates higher-order q-Euler
polynomials at negative integers. From our investigation, we can derive many
interesting identities of symmetry in two variables related to generalized
higher-order q-Euler polynomials and alternating generalized q-power sums.


title:
Asymptotic analysis of the SVD for the truncated Hilbert transform with
  overlap

abstract:
  The truncated Hilbert transform with overlap $H_T$ is an operator that arises
in tomographic reconstruction from limited data, more precisely in the method
of Differentiated Back-Projection (DBP). Recent work [1] has shown that the
singular values of this operator accumulate at both zero and one. To better
understand the properties of the operator and, in particular, the ill-posedness
of the inverse problem associated with it, it is of interest to know the rates
at which the singular values approach zero and one. In this paper, we exploit
the property that $H_T$ commutes with a second-order differential operator
$L_S$ and the global asymptotic behavior of its eigenfunctions to find the
asymptotics of the singular values and singular functions of $H_T$.


title:
Relaxation of the thermal Casimir force between net neutral plates
  containing Brownian charges

abstract:
  We investigate the dynamics of thermal Casimir interactions between plates
described within a living conductor model, with embedded mobile anions and
cations, whose density field obeys a stochastic partial differential equation
which can be derived starting from the Langevin equations of the individual
particles. This model describes the thermal Casimir interaction in the same way
that the fluctuating dipole model describes van der Waals interactions. The
model is analytically solved in a Debye-H\"uckel-like approximation. We
identify several limiting dynamical regimes where the time dependence of the
thermal Casimir interactions can be obtained explicitly. Most notably we find a
regime with diffusive scaling, even though the charges are confined to the
plates and do not diffuse into the intervening space, which makes the diffusive
scaling difficult to anticipate and quite unexpected on physical grounds.


title: Optimisation of fractal spaceframes under gentle compressive load

abstract:
  The principle of hierarchical design is a prominent theme in many natural
systems where mechanical efficiency is of importance. Here we establish the
properties of a particular hierarchical structure, showing that high mechanical
efficiency is found in certain loading regimes. We show that in the limit of
gentle loading, the optimal hierarchical order increases without bound. We show
that the scaling of material required for stability against loading to be
withstood can be altered in a systematic, beneficial manner through
manipulation of the number of structural length scales optimised upon. We
establish the relationship between the Hausdorff dimension of the optimal
structure and loading for which the structure is optimised. Practicalities of
fabrication are discussed and examples of hierarchical frames of the same
geometry constructed from solid beams are shown.


title: Equivariant singularity analysis of the 2:2 resonance

abstract:
  We present a general analysis of the bifurcation sequences of 2:2 resonant
reversible Hamiltonian systems invariant under spatial $\Z_2\times\Z_2$
symmetry. The rich structure of these systems is investigated by a singularity
theory approach based on the construction of a universal deformation of the
detuned Birkhoff normal form. The thresholds for the bifurcations are computed
as asymptotic series also in terms of physical quantities for the original
system.


title: Statistical inference for exponential functionals of L\'evy processes

abstract:
  In this paper, we consider the exponential functional
\(A_{\infty}=\int_0^\infty e^{-\xi_s}ds\) of a L{\'e}vy process \(\xi_s\) and
aim to estimate the characteristics of \(\xi_{s}\) from the distribution of
\(A_{\infty}\). We present a new approach, which allows to statistically infer
on the L{\'e}vy triplet of \(\xi_{t}\), and study the theoretical properties of
the proposed estimators. The suggested algorithms are illustrated with
numerical simulations.


title:
Detection methods to rule out completely co-positive and bi-entangling
  operations

abstract:
  In this work we extend the quantum channel detection method developed in
[Phys. Rev. A 88, 042335 (2013)] and [Phys. Script. T153, 014044 (2013)] in
order to detect other interesting convex sets of quantum channels. First we
work out a procedure to detect non completely co-positive maps. Then we focus
on the set of so-called bi-entangling operations and show how a map outside
this set can be revealed. In both cases we provide explicit examples showing
the theoretical technique and the corresponding experimental procedure.


title: Close pairs of galaxies with different activity levels

abstract:
  We selected and studied 180 pairs with dV < 800 km/s and Dp < 60 kpc
containing Markarian (MRK) galaxies to investigate the dependence of galaxies'
integral parameters, star-formation (SF) and active galactic nuclei (AGN)
properties on kinematics of pairs, their structure and large-scale
environments. Projected radial separation Dp and perturbation level P are
better measures of interaction strength than dV. The latter correlates with the
density of large-scale environment and with the morphologies of galaxies. Both
galaxies in a pair are of the same nature, the only difference is that MRK
galaxies are usually righter than their neighbors. Specific star formation
rates (SSFR) of galaxies in pairs with smaller Dp or dV is in average 0.5 dex
higher than that of galaxies in pairs with larger Dp or dV. Closeness of a
neighbor with the same and later morphological type increases the SSFR, while
earlier-type neighbors do not increase SSFR. Major interactions/mergers trigger
SF and AGN more effectively than minor ones. The fraction of AGNs is higher in
more perturbed pairs and pairs with smaller Dp. AGNs typically are in stronger
interacting systems than star-forming and passive galaxies. There are
correlations of both SSFRs and spectral properties of nuclei between pair
members.


title:
Measurement and modelling of anomalous polarity pulses in a
  multi-electrode diamond detector

abstract:
  In multi-electrode detectors, the motion of excess carriers generated by
ionizing radiation induces charge pulses at the electrodes, whose intensities
and polarities depend on the geometrical, electrostatic and carriers transport
properties of the device. The resulting charge sharing effects may lead to
bipolar currents, pulse height defects and anomalous polarity signals affecting
the response of the device to ionizing radiation. This latter effect has
recently attracted attention in commonly used detector materials, but different
interpretations have been suggested, depending on the material, the geometry of
the device and the nature of the ionizing radiation. In this letter, we report
on the investigation in the formation of anomalous polarity pulses in a
multi-electrode diamond detector with buried graphitic electrodes. In
particular, we propose a purely electrostatic model based on the
Shockley-Ramo-Gunn theory, providing a satisfactory description of anomalous
pulses observed in charge collection efficiency maps measured by means of Ion
Beam Induced Charge (IBIC) microscopy, and suitable for a general application
in multi-electrode devices and detectors.


title: Radioactive contamination of BaF2 crystal scintillator

abstract:
  Barium fluoride (BaF$_2$) crystal scintillators are promising detectors to
search for double beta decay processes in $^{130}$Ba ($Q_{2{\beta}}$ = 2619(3)
keV) and $^{132}$Ba ($Q_{2{\beta}}$ = 844(1) keV). The $^{130}$Ba isotope is of
particular interest because of the indications on 2${\beta}$ decay found in two
geochemical experiments. The radioactive contamination of BaF$_2$ scintillation
crystal with mass of 1.714 kg was measured over 113.4 hours in a low-background
DAMA/R&D set-up deep underground (3600 m w.e.) at the Gran Sasso National
Laboratories of INFN (LNGS, Italy). The half-life of $^{212}$Po (present in the
crystal scintillator due to contamination by radium) was estimated as $T_{1/2}$
= 298.8 $\pm$ 0.8(stat.) $\pm$ 1.4(syst.) ns by analysis of the events pulse
profiles.


title:
The Pan-STARRS1 Medium-Deep Survey: The role of galaxy group environment
  in the star formation rate versus stellar mass relation and quiescent
  fraction out to $z \sim 0.8$

abstract:
  Using a large sample of field and group galaxies drawn from the Pan-STARRS1
Medium-Deep Survey, we present the specific star formation rate (SSFR) -
stellar mass (M*) relation, as well as the quiescent fraction versus M*
relation in different environments. We confirm that the fraction of quiescent
galaxies is strongly dependent on environment at a fixed stellar mass, but that
the amplitude and the slope of the star-forming sequence is similar between the
field and groups: in other words, the SSFR-density relation at a fixed stellar
mass is primarily driven by the change in the star-forming and quiescent
fractions between different environments rather than a global suppression in
the star formation rate for the star-forming population. However, when we
restrict our sample to the cluster-scale environments ($M>10^{14}M_{solar}$),
we find a global reduction in the SSFR of the star forming sequence of $17\%$
at 4$\sigma$ confidence as opposed to its field counterpart. After removing the
stellar mass dependence of the quiescent fraction seen in field galaxies, the
excess in the quiescent fraction due to the environment quenching in groups and
clusters is found to increase with stellar mass. We argue that these results
are in favor of galaxy mergers to be the primary environment quenching
mechanism operating in galaxy groups whereas strangulation is able to reproduce
the observed trend in the environment quenching efficiency and stellar mass
relation seen in clusters. Our results also suggest that the relative
importance between mass quenching and environment quenching depends on stellar
mass -- the mass quenching plays a dominant role in producing quiescent
galaxies for more massive galaxies, while less massive galaxies are quenched
mostly through the environmental effect, with the transition mass around
$1-2\times10^{10}M_{solar}$ in the group/cluster environment. (abridged)


title:
Low-power photothermal probing of single plasmonic nanostructures with
  nanomechanical string resonators

abstract:
  We demonstrate the direct photothermal probing and mapping of single
plasmonic nanostructures via the temperature induced detuning of nanomechanical
string resonators. Single Au nanoslits are illuminated with a low-power
polarized focused laser beam ({\lambda} = 633 nm). Polarization dependent heat
generation in gold nanoslits is then imaged with high sensitivity. A
sensitivity of -4.1 ppm/nW with respect to the illuminated light (beam diameter
5.0pm0.8 {\mu}m) is determined for a single nanoslit (1 {\mu}m long and 53 nm
wide), which equals to a total light absorption of 16%. This results in a
heating of 0.5 K for an illuminance of 8 nW/{\mu}m2. Our results show that
nanomechanical resonators are a unique and robust analysis tool for the
low-power investigation of thermoplasmonic effects in plasmonic hot spots.


title: Freeman Dyson and Gravitational Spin Precession

abstract:
  In 1974 Hulse and Taylor discovered the binary pulsar. At that time Prof.
Dyson was visiting the Max Planck Institute for Physics at Munich, where I was
also working. He initiated a number of discussions on this object. During them
it occurred to me that this system could be used to test Geodetic Precession in
Einsteins theory, which, even after years of work by the Stanford gyroscope
expt, had remained a challenge. I showed some preliminary calculations to Prof
Dyson and he encouraged me to do a more refined job. To be applicable to the
binary pulsar, one needed to generalise the general relativistic calculations
to beyond the so called test particle assumption. Barker and OConnell had
obtained such a result from analysing the gravitational interactions of spin
half Dirac fermions in linearized spin 2 theories of gravitation. With C.F. Cho
I produced a purely classical calculation, using Schwingers Source theory.
Boerner, Ehlers and Rudolf confirmed this result with their general
relativistic calculations shortly after. With V. Radhakrishnan, I gave a
detailed model for the pulse width and polarization sweep as a means of
observing this effect. All throughout Prof. Dyson was supportive with reading
the manuscripts and his critical comments. In 2005, coincidentally the
centennial of the Annus Mirabilis(1905), Hotan, Bailes and Ord observed this in
the binary pulsar J1141 6545.


title:
Exchange coupling between silicon donors: the crucial role of the
  central cell and mass anisotropy

abstract:
  Donors in silicon are now demonstrated as one of the leading candidates for
implementing qubits and quantum information processing. Single qubit
operations, measurements and long coherence times are firmly established, but
progress on controlling two qubit interactions has been slower. One reason for
this is that the inter donor exchange coupling has been predicted to oscillate
with separation, making it hard to estimate in device designs. We present a
multivalley effective mass theory of a donor pair in silicon, including both a
central cell potential and the effective mass anisotropy intrinsic in the Si
conduction band. We are able to accurately describe the single donor properties
of valley-orbit coupling and the spatial extent of donor wave functions,
highlighting the importance of fitting measured values of hyperfine coupling
and the orbital energy of the $1s$ levels. Ours is a simple framework that can
be applied flexibly to a range of experimental scenarios, but it is nonetheless
able to provide fast and reliable predictions. We use it to estimate the
exchange coupling between two donor electrons and we find a smoothing of its
expected oscillations, and predict a monotonic dependence on separation if two
donors are spaced precisely along the [100] direction.


title:
Learning High-level Image Representation for Image Retrieval via
  Multi-Task DNN using Clickthrough Data

abstract:
  Image retrieval refers to finding relevant images from an image database for
a query, which is considered difficult for the gap between low-level
representation of images and high-level representation of queries. Recently
further developed Deep Neural Network sheds light on automatically learning
high-level image representation from raw pixels. In this paper, we proposed a
multi-task DNN learned for image retrieval, which contains two parts, i.e.,
query-sharing layers for image representation computation and query-specific
layers for relevance estimation. The weights of multi-task DNN are learned on
clickthrough data by Ring Training. Experimental results on both simulated and
real dataset show the effectiveness of the proposed method.


title:
Probing gluon number fluctuation effects in future electron-hadron
  colliders

abstract:
  The description of the QCD dynamics in the kinematical range which will be
probed in the future electron - hadron colliders is still an open question.
Although phenomenological studies indicate that the gluon number fluctuations,
which are related to discreteness in the QCD evolution, are negligible at HERA,
the magnitude of these effects for the next generation of colliders still
should be estimated. In this paper we investigate inclusive and diffractive
$ep$ observables considering a model for the physical scattering amplitude
which describes the HERA data. Moreover, we estimate, for the first time, the
contribution of the fluctuation effects for the nuclear structure functions.
Our results indicate that the study of these observables in the future
colliders can be useful to constrain the presence of gluon number fluctuations.


title: Software Process Commonality Analysis

abstract:
  To remain viable and thrive, software organizations must rapidly adapt to
frequent, and often rather far-ranging, changes to their operational context.
These changes typically concern many factors, including the nature of the
organization's marketplace in general, its customers' demands, and its business
needs. In today's most highly dynamic contexts, such as web services
development, other changes create additional, severe challenges. Most critical
are changes to the technology in which a software product is written or which
the software product has to control or use to provide its functionality. These
product-support technology changes are frequently relatively 'small' and
incremental. They are, therefore, often handled by relatively 'small,'
incremental changes to the organization's software processes. However, the
frequency of these changes is high, and their impact is elevated by
time-to-market and requirements change demands. The net result is an extremely
challenging need to create and manage a large number of customized process
variants, collectively having more commonalities than differences, and
incorporating experience-based, proven 'best practices'. This paper describes a
tool-based approach to coping with product-support technology changes. The
approach utilizes established capabilities such as descriptive process modeling
and the creation of reference models. It incorporates a new, innovative,
tool-based capability to analyze commonalities and differences among processes.
The paper includes an example-based evaluation of the approach in the domain of
Wireless Internet Services as well as a discussion of its potentially broader
application.


title: Maps between certain complex Grassmann manifolds

abstract:
  Let $k,l,m,n$ be positive integers such that $m-l\ge l>k, m-l>n-k\ge k$ and
$m-l>2k^2-k-1$. Let $G_{k}(\mathbb{C}^n)$ denote the Grassmann manifold of
$k$-dimensional vector subspaces of $\bc^n$. We show that any continuous map
$f:G_{l}(\bc^m)\to G_{k}(\mathbb{C}^n)$ is rationally null-homotopic. As an
application, we show the existence of a point $A\in G_{l}(\bc^m)$ such that the
vector space $f(A)$ is contained in $A$; here $\mathbb{C}^n$ is regarded as a
vector subspace of $\mathbb{C}^m\cong \bc^n\oplus\bc^{m-n}.$


title:
Integration of Omics Data and Systems Biology Modeling: Effect of
  Cyclosporine A on the Nrf2 Pathway in Human Renal Kidneys Cells

abstract:
  In a recent paper, Wilmes et al. demonstrated a qualitative integration of
omics data streams to gain a mechanistic understanding of cyclosporine A
toxicity. One of their major conclusions was that cyclosporine A strongly
activates the nuclear factor (erythroid-derived 2)-like 2 pathway (Nrf2) in
renal proximal tubular epithelial cells exposed in vitro. We pursue here the
analysis of those data with a quantitative integration of omics data with a
differential equation model of the Nrf2 pathway. That was done in two steps:
(i) Modeling the in vitro pharmacokinetics of cyclosporine A (exchange between
cells, culture medium and vial walls) with a minimal distribution model. (ii)
Modeling the time course of omics markers in response to cyclosporine A
exposure at the cell level with a coupled PK-systems biology model. Posterior
statistical distributions of the parameter values were obtained by Markov chain
Monte Carlo sampling. Data were well simulated, and the known in vitro toxic
effect EC50 was well matched by model predictions. The integration of in vitro
pharmacokinetics and systems biology modeling gives us a quantitative insight
into mechanisms of cyclosporine A oxidative-stress induction, and a way to
predict such a stress for a variety of exposure conditions.


title: Super Wilson Loops and Holonomy on Supermanifolds

abstract:
  The classical Wilson loop is the gauge-invariant trace of the parallel
transport around a closed path with respect to a connection on a vector bundle
over a smooth manifold. We build a precise mathematical model of the super
Wilson loop, an extension introduced by Mason-Skinner and Caron-Huot, by
endowing the objects occurring with auxiliary Gra{\ss}mann generators coming
from S-points. A key feature of our model is a supergeometric parallel
transport, which allows for a natural notion of holonomy on a supermanifold as
a Lie group valued functor. Our main results for that theory comprise an
Ambrose-Singer theorem as well as a natural analogon of the holonomy principle.
Finally, we compare our holonomy functor with the holonomy supergroup
introduced by Galaev in the common situation of a topological point. It turns
out that both theories are different, yet related in a sense made precise.


title: Co-Sparse Textural Similarity for Image Segmentation

abstract:
  We propose an algorithm for segmenting natural images based on texture and
color information, which leverages the co-sparse analysis model for image
segmentation within a convex multilabel optimization framework. As a key
ingredient of this method, we introduce a novel textural similarity measure,
which builds upon the co-sparse representation of image patches. We propose a
Bayesian approach to merge textural similarity with information about color and
location. Combined with recently developed convex multilabel optimization
methods this leads to an efficient algorithm for both supervised and
unsupervised segmentation, which is easily parallelized on graphics hardware.
The approach provides competitive results in unsupervised segmentation and
outperforms state-of-the-art interactive segmentation methods on the Graz
Benchmark.


title:
Discovery of a large number of candidate proto-clusters traced by ~15
  Mpc-scale galaxy overdensities in COSMOS

abstract:
  To demonstrate the feasibility of studying the epoch of massive galaxy
cluster formation in a more systematic manner using current and future galaxy
surveys, we report the discovery of a large sample of proto-cluster candidates
in the 1.62 deg^2 COSMOS/UltraVISTA field traced by optical/IR selected
galaxies using photometric redshifts. By comparing properly smoothed 3D galaxy
density maps of the observations and a set of matched simulations incorporating
the dominant observational effects (galaxy selection and photometric redshift
uncertainties), we first confirm that the observed ~15 comoving Mpc scale
galaxy clustering is consistent with LCDM models. Using further the relation
between high-z overdensity and the present day cluster mass calibrated in these
matched simulations, we found 36 candidate structures at 1.6<z<3.1, showing
overdensities consistent with the progenitors of M_z=0 ~10^15 M_sun clusters.
Taking into account the significant upward scattering of lower mass structures,
the probabilities for the candidates to have at least M_z=0 ~10^14 M_sun are
~70%. For each structure, about 15%-40% of photometric galaxy candidates are
expected to be true proto-cluster members that will merge into a cluster-scale
halo by z=0. With solely photometric redshifts, we successfully rediscover two
spectroscopically confirmed structures in this field, suggesting that our
algorithm is robust. This work generates a large sample of uniformly-selected
proto-cluster candidates, providing rich targets for spectroscopic follow-up
and subsequent studies of cluster formation. Meanwhile, it demonstrates the
potential for probing early cluster formation with upcoming redshift surveys
such as the Hobby-Eberly Telescope Dark Energy Experiment and the Subaru Prime
Focus Spectrograph survey.


title: Shiga Toxin Detection Methods : A Short Review

abstract:
  The Shiga toxins comprise a family of related protein toxins secreted by
certain types of bacteria. Shigella dysenteriae, some strain of Escherichia
coli and other bacterias can express toxins which caused serious complication
during the infection. Shiga toxin and the closely related Shiga-like toxins
represent a group of very similar cytotoxins that may play an important role in
diarrheal disease and hemolytic-uremic syndrome. The outbreaks caused by this
toxin raised serious public health crisis and caused economic losses. These
toxins have the same biologic activities and according to recent studies also
share the same binding receptor, globotriosyl ceramide (Gb3). Rapid detection
of food contamination is therefore relevant for the containment of food-borne
pathogens. The conventional methods to detect pathogens, such as
microbiological and biochemical identification are time-consuming and
laborious. The immunological or nucleic acid-based techniques require extensive
sample preparation and are not amenable to miniaturization for on-site
detection. In the present are necessary of techniques of rapid identification,
simple and sensitive which can be employed in the countryside with
minimally-sophisticated instrumentation. Biosensors have shown tremendous
promise to overcome these limitations and are being aggressively studied to
provide rapid, reliable and sensitive detection platforms for such
applications.


title: Lunar polar craters -- icy, rough or just sloping?

abstract:
  Circular Polarisation Ratio (CPR) mosaics from Mini-SAR on Chandrayaan-1 and
Mini-RF on LRO are used to study craters near to the lunar north pole. The look
direction of the detectors strongly affects the appearance of the crater CPR
maps. Rectifying the mosaics to account for parallax also significantly changes
the CPR maps of the crater interiors. It is shown that the CPRs of crater
interiors in unrectified maps are biased to larger values than crater
exteriors, because of a combination of the effects of parallax and incidence
angle. Using the LOLA Digital Elevation Map (DEM), the variation of CPR with
angle of incidence has been studied. For fresh craters, CPR~0.7 with only a
weak dependence on angle of incidence or position interior or just exterior to
the crater, consistent with dihedral scattering from blocky surface roughness.
For anomalous craters, the CPR interior to the crater increases with both
incidence angle and distance from the crater centre. Central crater CPRs are
similar to those in the crater exteriors. CPR does not appear to correlate with
temperature within craters. Furthermore, the anomalous polar craters have
diameter-to-depth ratios that are lower than those of typical polar craters.
These results strongly suggest that the high CPR values in anomalous polar
craters are not providing evidence of significant volumes of water ice. Rather,
anomalous craters are of intermediate age, and maintain sufficiently steep
walls that deep regolith does not cover all rough surfaces.


title: Big Free Groups are Almost Free

abstract:
  It is shown that the big free group (the set of countably-long words over a
countable alphabet) is almost free, in the sense that any function from the
alphabet to a compact topological group factors through a homomorphism. This
statement is in fact a simple corollary of the more general result proven below
on the extendability of homomorphisms from subgroups (of a certain kind) of the
big free group to a compact topological group.


title: New Modal Quantum Mechanics

abstract:
  We describe an interpretation of quantum mechanics based on reduced density
matrices of sub-systems from which the standard Copenhagen interpretation
emerges as an effective description for macro-systems. The interpretation is a
modal one, but does not suffer from the range of problems that plague other
modal interpretations. The key feature is that quantum states carry an
additional property assignment in the form of one the eigenvectors of the
reduced density matrix which evolves evolves according to a stochastic process
driven by the unmodified Schrodinger equation, but it is usually hidden from
the emergent classical description due to the ergodic nature of its dynamics.
However, during a quantum measurement, ergodicity is broken by decoherence and
definite outcomes occur with probabilities that agree with the Born rule.


title:
BW - Eye Ophthalmologic decision support system based on clinical
  workflow and data mining techniques-image registration algorithm

abstract:
  Blueworks - Medical Expert Diagnosis is developing an application, BWEye, to
be used as an ophthalmology consultation decision support system. The
implementation of this application involves several different tasks and one of
them is the implementation of an ophthalmology images registration algorithm.
The work reported in this document is related with the implementation of an
algorithm to register images of angiography, colour retinography and redfree
retinography. The implementations described were developed in the software
MATLAB.
  The implemented algorithm is based in the detection of the bifurcation points
(y-features) of the vascular structures of the retina that usually are visible
in the referred type of images. There are proposed two approaches to establish
an initial set of features correspondences. The first approach is based in the
maximization of the mutual information of the bifurcation regions of the
features of images. The second approach is based in the characterization of
each bifurcation point and in the minimization of the Euclidean distance
between the descriptions of the features of the images in the descriptors
space. The final set of the matching features for a pair of images is defined
through the application of the RANSAC algorithm.
  Although, it was not achieved the implementation of a full functional
algorithm, there were made several analysis that can be important to future
improvement of the current implementation.


title: Multivariable $(\varphi,\Gamma)$-modules and locally analytic vectors

abstract:
  Let $K$ be a finite extension of $\mathbf{Q}_p$ and let $G_K =
\mathrm{Gal}(\bar{\mathbf{Q}}_p/K)$. There is a very useful classification of
$p$-adic representations of $G_K$ in terms of cyclotomic
$(\varphi,\Gamma)$-modules (cyclotomic means that $\Gamma={\rm
Gal}(K_\infty/K)$ where $K_\infty$ is the cyclotomic extension of $K$). One
particularly convenient feature of the cyclotomic theory is the fact that any
$(\varphi,\Gamma)$-module is overconvergent.
  Questions pertaining to the $p$-adic local Langlands correspondence lead us
to ask for a generalization of the theory of $(\varphi,\Gamma)$-modules, with
the cyclotomic extension replaced by an infinitely ramified $p$-adic Lie
extension $K_\infty / K$. It is not clear what shape such a generalization
should have in general. Even in the case where we have such a generalization,
namely the case of a Lubin-Tate extension, most $(\varphi,\Gamma)$-modules fail
to be overconvergent.
  In this article, we develop an approach that gives a solution to both
problems at the same time, by considering the locally analytic vectors for the
action of $\Gamma$ inside some big modules defined using Fontaine's rings of
periods. We show that, in the cyclotomic case, we recover the ususal
overconvergent $(\varphi,\Gamma)$-modules. In the Lubin-Tate case, we can
prove, as an application of our theory, a folklore conjecture in the field
stating that $(\varphi,\Gamma)$-modules attached to $F$-analytic
representations are overconvergent.


title: Bogomolov multipliers of all groups of order 128

abstract:
  This note is an implementation of the algorithm for computing Bogomolov
multipliers as given in \cite{Mor11} in combination with \cite{Eic08} to
effectively determine the multipliers of groups of order $128$. The two serving
purposes are a continuation of the results \cite{Chu08,Chu09}, and an
application \cite{Jez13}.


title: The nature and origin of magnetic fields in early-type stars

abstract:
  I review our current knowledge of magnetic fields in stars more massive than
around 1.5 Msun, in particular their nature and origin. This includes the
strong magnetic fields found in a subset of the population and the fossil field
theory invoked to explain them; the subgauss fields detected in Vega and Sirius
and their possible origin; and what we can infer about magnetic activity in
massive stars and how it might be linked to subsurface convection.


title: Measuring CP violation in 3- and 4-body decays

abstract:
  Multibody charm decays have a rich phenomenology and potentially unique
sensitivity to CP violation. In these proceedings we discuss recent results,
challenges and prospects in searches for CP violation in three and four body
charm decays.


title:
Direct observation of quantum confinement of massless Dirac fermions in
  a topological insulator

abstract:
  Since the discovery of topological insulators (TIs)1,2, the peculiar nature
of their chiral surface states has been experimentally demonstrated both in
bulk and in film materials with open boundaries3,4. Closed boundary on a TI
surface may intrigue more interesting phenomena such as quantum confinement of
massless Dirac fermions (DFs), which is analogous to the quantum corral (QC)
for massive free electrons on a metal surface5-10. To date, it keeps a highly
stringent challenge to realize a true Dirac QC due to the unusual transmitting
power of a massless fermion. Through heteroepitaxially growing a Bi bilayer on
the Bi2Te3 surface with appropriate coverage, here we demonstrate the
realization of a true Dirac QC. Specifically, spectacular maps of quantum
interference in equilateral triangle-shaped QCs surrounded by Bi bilayers are
directly visualized by using a low-temperature scanning tunneling microscope.
The present success is ascribed to a perfect orientation matching between the
QC boundary and the stationary-phase scattering of massless DFs. In addition,
the quasiparticle lifetime of the confined DFs is also systematically measured
and analyzed.


title: On physical problems that are slightly more difficult than QMA

abstract:
  We study the complexity of computational problems from quantum physics.
Typically, they are studied using the complexity class QMA (quantum counterpart
of NP) but some natural computational problems appear to be slightly harder
than QMA. We introduce new complexity classes consisting of problems that are
solvable with a small number of queries to a QMA oracle and use these
complexity classes to quantify the complexity of several natural computational
problems (for example, the complexity of estimating the spectral gap of a
Hamiltonian).


title:
Status of the aligned two-Higgs-doublet model confronted with the Higgs
  data

abstract:
  Imposing the theoretical constraints from vacuum stability, unitarity and
perturbativity as well as the experimental constraints from the electroweak
precision data, flavor observables and the non-observation of additional Higgs
at collider, we study the implications of available Higgs signals on a
two-Higgs-doublet model with the alignment of the down-type quarks and charged
lepton Yukawa coupling matrices. Compared to the four traditional types of
two-Higgs-doublet models, the model has two additional mixing angles $\theta_d$
and $\theta_l$ in the down-type quark and charged lepton Yukawa interactions.
We find that the mixing angle $\theta_d$ can loose the constraints on
$sin(\beta-\alpha)$, $tan\beta$ and $m_{H^{\pm}}$ sizably. The model can
provide the marginally better fit to available Higgs signals data than SM,
which requires the Higgs couplings with gauge bosons, $u\bar{u}$ and $d\bar{d}$
to be properly suppressed, and favors (1 <\theta_d< 2, 0.5 <\theta_l< 2.2) for
$m_h=$ 125.5 GeV and (0.5 <\theta_d< 2, 0.5 <\theta_l< 2.2) for $m_H=$ 125.5
GeV. However, these Higgs couplings are allowed to have sizable deviations from
SM for ($m_h=$ 125.5 GeV, 125.5 $\leq m_H\leq$ 128 GeV) and (125 GeV $\leq
m_h\leq$ 125.5 GeV, $m_H=$ 125.5 GeV).


title: Extremely confined gap surface plasmon modes excited by electrons

abstract:
  High spatial and energy resolution EELS can be employed for detailed
characterization of both localized and propagating surface plasmon excitations
supported by metal nanostructures, giving insight into fundamental physical
phenomena involved in various plasmonic effects. Here, applying EELS to
ultra-sharp convex grooves in gold, we directly probe extremely confined gap
surface plasmon (GSP) modes excited by swift electrons in nanometer-wide gaps.
Both experimental and theoretical EELS data reveal the resonance behavior
associated with the excitation of the antisymmetric (with respect to the
transverse electric-field component) GSP mode for extremely small gap widths,
down to ~5 nm. It is argued that the excitation of this mode, featuring very
strong absorption, plays a crucial role in the experimental realization of
non-resonant light absorption by ultra-sharp convex grooves with
fabrication-induced asymmetry. Occurrence of the antisymmetric GSP mode along
with the fundamental GSP mode exploited in plasmonic waveguides with extreme
light confinement is a very important factor that should be taken into account
in the design of plasmonic nanophotonic circuits and devices.


title: On the dimension dependence of some weighted inequalities

abstract:
  In the context of radial weights we study the dimension dependence of some
weighted inequalities for maximal operators. We study the growth of the
$A_1$-constants for radial weights and show the equivalence between the uniform
boundedness of these constants, a dimension-free weak $L^1$ estimate for the
maximal operator on annuli and the condition on the weight to be decreasing and
essentially constant over dyadic annuli. Each one of these conditions is shown
to provide dimension-free weighted weak type $L^1$ estimates for the centred
maximal Hardy-Littlewood operator acting on radial functions. Finally we show
that the universal maximal operator is of restricted weak type on weighted
$L^n(\real^n)$ with constants uniformly bounded in dimension whenever we
consider an $A_1$ weight.


title:
To Study the Effect of Grating Length on Propagating Modes in Bragg
  Filters with AlxGa1-xN/GaN Material Composition

abstract:
  In this paper, the forward and backward propagating modes in an optical
waveguide structure namely the fiber Bragg filter also considered as a one
dimensional photonic crystal, are analytically computed as a function of
grating length for coupled optical modes. AlxGa1-xN/GaN material composition is
considered as a unit block of the periodic organization, and refractive index
of AlxGa1-xN/GaN is taken to be dependent on material composition, bandgap and
operating wavelength following Adachi's model. Expressions of propagating wave
are derived using coupled mode theory. Simulated results help us to study the
propagation of forward and backward wave propagating modes inside fiber and
waveguide devices.


title:
Measurements on Melting Pressure, Metastable Solid Phases, and Molar
  Volume of Univariant Saturated Helium Mixture

abstract:
  A concentration-saturated helium mixture at the melting pressure consists of
two liquid phases and one or two solid phases. The equilibrium system is
univariant, whose properties depend uniquely on temperature. Four coexisting
phases can exist on singular points, which are called quadruple points. As a
univariant system, the melting pressure could be used as a thermometric
standard. It would provide some advantages compared to the current reference,
namely pure $^3$He, especially at the lowest temperatures below 1 mK. We have
extended the melting pressure measurements of the concentration-saturated
helium mixture from 10 mK to 460 mK. The density of the dilute liquid phase was
also recorded. The effect of the equilibrium crystal structure changing from
hcp to bcc was clearly seen at T=294 mK at the melting pressure P=2.638 MPa. We
observed the existence of metastable solid phases around this point. No
evidence was found for the presence of another, disputed, quadruple point at
around 400 mK. The experimental results agree well with our previous
calculations at low temperatures, but deviate above 200 mK.


title:
A biaxial apparatus for the study of heterogeneous and intermittent
  strains in granular materials

abstract:
  We present an experimental apparatus specifically designed to investigate the
precursors of failure in granular materials. A sample of granular material is
placed between a latex membrane and a glass plate. A confining effective
pressure is applied by applying vacuum to the sample. Displacement-controlled
compression is applied in the vertical direction, while the specimen deforms in
plane strain. A Diffusing Wave Spectroscopy visualization setup gives access to
the measurement of deformations near the glass plate. After describing the
different parts of this experimental setup, we present a demonstration
experiment where extremely small (of order $10^{-5}$) heterogeneous strains are
measured during the loading process.


title:
Experimental study of the spatio-temporal development of meter-scale
  negative discharge in air

abstract:
  We study the development of a negative discharge driven by a Marx generator
of about 1 MV in an air gap of 1 up to 1.5 meter, at standard temperature and
pressure. We show the evolution of the discharge with nanosecond-fast
photography together with the electrical characteristics. The negative
discharge develops through four well-distinguished streamer bursts. The
streamers have different velocities and life times in different bursts. The
last burst triggers a positive inception cloud on the positive grounded
electrode and a burst of positive counter-streamers emerges. The pre-discharge
then bridges the gap and leaders grow from both electrodes. Finally a spark is
formed. Looking closer into the pre-ionized zone near the cathode, we find
isolated dots which are potential branching points. These dots act as starting
points for positive streamers that move towards the high-voltage electrode. We
also find such phenomena as space leaders and leader stepping in our laboratory
sparks.


title: Photoemission spectroscopy with high-intensity short-wavelength lasers

abstract:
  We theoretically study the process of photoelectron emission of the Helium
atom by a high-intensity short-wavelength laser at a resonance condition of the
residual singly charged ion. Photoionization followed by strong resonance
coupling in the ion leads to a change in the photoelectron spectrum due to Rabi
oscillations in the residual ion. Similarly to resonance fluorescence at high
laser intensity, the photoelectron spectrum at high intensities evolves into a
multi-peaked structure. The number of peaks in the photoelectron spectrum is
related to the number of Rabi cycles following the photoionization process.
Moreover, the strong laser-induced coupling to nonresonant states of the
residual ion have an imprint on the photoelectron spectrum, leading to
additional, isolated peaks at the lower or higher energy sides. The effect
should be observable at current seeded XUV free-electron lasers and persists
after volume integration in a realistic experimental geometry.


title:
New consequences of the Riemann-Siegel formula and a law of asymptotic
  equality of signum-areas of $Z(t)$ function

abstract:
  In this paper we obtain the first mean-value theorems for the function $Z(t)$
on some disconnected sets. Next, we obtain a geometric law that controls
chaotic behavior of the graph of the function $Z(t)$. This paper is the English
version of the papers \cite{8} and \cite{9}, except of the Appendix that
connects our results with the theory of Jacob's ladders, namely new third-order
formulae have been obtained.