title:
VLT-SINFONI integral field spectroscopy of low-z luminous and
  ultraluminous infrared galaxies II. 2D extinction structure and distance
  effects

abstract:
  We present a 2D study of the internal extinction on (sub)kiloparsec scales of
a sample of local (z<0.1) (U)LIRGs, based on near-infrared Pa_a, Br_d, and Br_g
line ratios, obtained with VLT-SINFONI integral-field spectroscopy. The 2D
extinction (Av) distributions of the objects, map regions of ~3x3 kpc (LIRGs)
and ~12x12 kpc (ULIRGs), with average angular resolutions (FWHM) of ~0.2 kpc
and ~0.9 kpc, respectively. The individual Av galaxy distributions indicate a
very clumpy dust structure already on sub-kiloparsec scales, with values (per
spaxel) ranging from Av ~ 1 to 20 mag in LIRGs, and from Av ~ 2 to 15 mag in
ULIRGs. As a class, the median values of the distributions are Av=5.3 mag and
Av=6.5 mag for the LIRG and ULIRG subsamples, respectively.
  We evaluated the effects of the galaxy distance in the measurements of the
extinction as a function of the linear scale (in kpc) of the spaxel (i.e. due
to the limited angular resolution of the observations). If the distribution of
the gas/dust and star-forming regions in local LIRGs (63 Mpc, 40 pc/spaxel on
average) is the same for galaxies at greater distances, the observed median Av
values based on emission line ratios would be a factor ~0.8 lower at the
average distance of our ULIRG sample (328 Mpc, 0.2 kpc/spaxel), and a factor
~0.67 for galaxies located at distances of more than 800 Mpc (0.4 kpc/spaxel).
This distance effect would have implications for deriving the intrinsic
extinction in high-z star-forming galaxies and for subsequent properties such
as star formation rate, star formation surface density, and KS- law, based on
H_alpha line fluxes. If local LIRGs are analogues of the main-sequence
star-forming galaxies at cosmological distances, the extinction values (Av)
derived from the observed emission lines in these high-z sources would need to
be increased by a factor 1.4 on average.


title:
Partial Wave Analysis of Nucleon-Nucleon Scattering below pion
  production threshold

abstract:
  We undertake a simultaneous partial wave analysis to proton-proton and
neutron-proton scattering data below pion production threshold up to LAB
energies of 350MeV. We represent the interaction as a sum of delta-shells in
configuration space below 3fm and a charge dependent one pion exchange
potential above 3fm together with electromagnetic effects. We obtain chi^2 =
2813|pp + 3985|np with a total of N = 2747|pp + 3691|np data obtained till 2013
and a total number of 46 fitting parameters yielding chi^2 /d.o.f = 1.06.
Special attention is paid to estimate the errors of the phenomenological
interaction as well as the derived effects on the phase-shifts and scattering
amplitudes.


title:
On the convergence of probabilities of the random graphs' properties
  expressed by first-order formulae with a bounded quantifier depth

abstract:
  An asymptotic behavior of the probabilities of first-order properties of
Erdos-Renyi random graph G(N,p), lnp=-alnN, is studied in the article. We prove
the covergence law for formulae with quantifier depth bounded by k when
a=1/(k-2).


title: Duality in STRIPS planning

abstract:
  We describe a duality mapping between STRIPS planning tasks. By exchanging
the initial and goal conditions, taking their respective complements, and
swapping for every action its precondition and delete list, one obtains for
every STRIPS task its dual version, which has a solution if and only if the
original does. This is proved by showing that the described transformation
essentially turns progression (forward search) into regression (backward
search) and vice versa.
  The duality sheds new light on STRIPS planning by allowing a transfer of
ideas from one search approach to the other. It can be used to construct new
algorithms from old ones, or (equivalently) to obtain new benchmarks from
existing ones. Experiments show that the dual versions of IPC benchmarks are in
general quite difficult for modern planners. This may be seen as a new
challenge. On the other hand, the cases where the dual versions are easier to
solve demonstrate that the duality can also be made useful in practice.


title: Higher Spin Contributions to Holographic Fluid Dynamics in $AdS_5/CFT_4$

abstract:
  We calculate the graviton's $\beta$-function in $AdS$ string-theoretic
sigma-model, perturbed by vertex operators for Vasiliev's higher spin gauge
fields in $AdS_5$. The result is given by $\beta_{mn}=R_{mn}+4T_{mn}(g,u)$
(with the AdS radius set to 1 and the graviton polarized along the $AdS_5$
boundary), with the matter stress-energy tensor given by that of conformal
holographic fluid in $d=4$, evaluated at the temperature given by
$T={1\over{\pi}}$. The stress-energy tensor is given by
$T_{mn}={g_{mn}}+4u_mu_n+\sum_{N}T^{(N)}_{mn}$ where $u$ is the vector
excitation satisfying $u^2=-1$ and $N$ is the order of the gradient expansion
in the dissipative part of the tensor. We calculate the contributions up to
N=2. The higher spin excitations contribute to the $\beta$-function, ensuring
the overall Weyl covariance of the matter stress tensor. We conjecture that the
structure of gradient expansion in $d=4$ conformal hydrodynamics at higher
orders is controlled by the higher spin operator algebra in $AdS_5$.


title:
Ligth-flavour identified charged-hadron production in pp and Pb-Pb
  collisions at the LHC

abstract:
  Thanks to the unique detector design adopted to fulfill tracking and
particle-identification (PID) requirements (e.g. low momentum cut-off and low
material budget), the ALICE experiment provides significant information about
hadron production both in pp and Pb-Pb collisions. In particular, the $p_{\rm
T}$-differential and integrated production yields of identified particles play
a key role in the study of the collective and thermal properties of the matter
formed in high-energy heavy-ion collisions. Furthermore, the production of
high-$p_{\rm T}$ particles provides insights into the property of the hot
medium created in such collisions and the in-medium energy-loss mechanisms.
Transverse momentum spectra of $\pi^{\pm}$, K$^{\pm}$, p and $\bar{\rm p}$ are
measured at mid-rapidity ($\left|y\right| <~0.5$) over a wide momentum range,
from $\sim$~100 MeV/$c$ up to $\sim$~20 GeV/$c$. The current results on
light-flavour charged-hadron production will be presented for pp collisions at
$\sqrt{s}$ = 0.9, 2.76 and 7 TeV and for Pb-Pb collisions at $\sqrt{s_{\rm
NN}}$ = 2.76 TeV. Integrated production yields, transverse momentum spectra and
particle ratios in pp are discussed as a function of the collision energy and
compared to previous experiments and commonly-used Monte Carlo models. Pb-Pb
collisions at the LHC feature the highest radial flow ever observed and an
unexpectedly low p/$\pi$ production ratio. The results are presented as a
function of collision centrality and compared to RHIC data in Au-Au collisions
at $\sqrt{s_{\rm NN}}$ = 200 GeV and predictions from thermal and hydrodynamic
models. The nuclear modification factor ($R_{\rm AA}$) of identified hadrons
will also be discussed and compared to unidentified charged particles and
theoretical predictions. This is observed to be identical for all particle
species at high-$p_{\rm T}$.


title: Extension of zero-one k-law

abstract:
  We study an asymptotic behavior of the probabilities of first-order
properties of random graph G(N,p) in the article. We conider p such that
lnp=-alnN, a>0. We find values of parameter a from (1-exp(ln2(1-k)),1) such
that the random graph obeys zero-one k-law.


title:
Centrality and pT dependence of J/psi suppression in proton-nucleus
  collisions from parton energy loss

abstract:
  The effects of parton energy loss and pT-broadening in cold nuclear matter on
the pT and centrality dependence, at various rapidities, of J/psi suppression
in p-A collisions are investigated. Calculations are systematically compared to
E866 and PHENIX measurements. The very good agreement between the data and the
theoretical expectations further supports pT-broadening and the associated
medium-induced parton energy loss as dominant effects in J/psi suppression in
high-energy p-A collisions. Predictions for J/psi (and Upsilon) suppression in
p-Pb collisions at the LHC are given.


title: A generalization of Euler numbers to finite Coxeter groups

abstract:
  It is known that Euler numbers, defined as the Taylor coefficients of the
tangent and secant functions, count alternating permutations in the symmetric
group. Springer defined a generalization of these numbers for each finite
Coxeter group by considering the largest descent class, and computed the value
in each case of the classification. We consider here another generalization of
Euler numbers for finite Coxeter groups, building on Stanley's result about the
number of orbits of maximal chains of set partitions. We present a method to
compute these integers and obtain the value in each case of the classification.


title:
A simple counterexample to the Jordan-H\"older property for derived
  categories

abstract:
  A counterexample to the Jordan-H\"older property for semiorthogonal
decompositions of derived categories of smooth projective varieties was
constructed by B\"ohning, Graf von Bothmer and Sosna. In this short note we
present a simpler example by realizing Bondal's quiver in the derived category
of a blowup of the projective space.


title: The isoperimetrix in the dual Brunn-Minkowski theory

abstract:
  We introduce the dual isoperimetrix which solves the isoperimetric problem in
the dual Brunn-Minkowski theory. We then show how the dual isoperimetrix is
related to the isoperimetrix from the Brunn-Minkowski theory.


title:
On the estimation of normal copula discrete regression models using the
  continuous extension and simulated likelihood

abstract:
  The continuous extension of a discrete random variable is amongst the
computational methods used for estimation of multivariate normal copula-based
models with discrete margins. Its advantage is that the likelihood can be
derived conveniently under the theory for copula models with continuous
margins, but there has not been a clear analysis of the adequacy of this
method. We investigate the asymptotic and small-sample efficiency of two
variants of the method for estimating the multivariate normal copula with
univariate binary, Poisson, and negative binomial regressions, and show that
they lead to biased estimates for the latent correlations, and the univariate
marginal parameters that are not regression coefficients. We implement a
maximum simulated likelihood method, which is based on evaluating the
multidimensional integrals of the likelihood with randomized quasi Monte Carlo
methods. Asymptotic and small-sample efficiency calculations show that our
method is nearly as efficient as maximum likelihood for fully specified
multivariate normal copula-based models. An illustrative example is given to
show the use of our simulated likelihood method.


title: Seminormal forms and cyclotomic quiver Hecke algebras of type $A$

abstract:
  This paper shows that the cyclotomic quiver Hecke algebras of type $A$, and
the gradings on these algebras, are intimately related to the classical
seminormal forms. We start by classifying all seminormal bases and then give an
explicit "integral" closed formula for the Gram determinants of the Specht
modules in terms of the combinatorics which utilizes the KLR gradings. We then
use seminormal forms to give a deformation of the KLR algebras of type $A$.
This makes it possible to study the cyclotomic quiver Hecke algebras in terms
of the semisimple representation theory and seminormal forms. As an application
we construct a new distinguished graded cellular basis of the cyclotomic KLR
algebras of type $A$.


title: On the number of cusps on cuspidal curves on Hirzebruch surfaces

abstract:
  In this article we give an upper bound for the number of cusps on a cuspidal
curve on a Hirzebruch surface. We adapt the results that have been found for a
similar question asked for cuspidal curves on the projective plane, and restate
the results in this new setting.


title: Diffuse $\gamma$-ray emission from misaligned active galactic nuclei

abstract:
  Active galactic nuclei (AGN) with jets seen at small viewing angles are the
most luminous and abundant objects in the $\gamma$-ray sky. AGN with jets
misaligned along the line-of-sight appear fainter in the sky, but are more
numerous than the brighter blazars. We calculate the diffuse $\gamma$-ray
emission due to the population of misaligned AGN (MAGN) unresolved by the Large
Area Telescope (LAT) on the {\it Fermi} Gamma-ray Space Telescope ({\it
Fermi}). A correlation between the $\gamma$-ray luminosity and the radio-core
luminosity is established and demonstrated to be physical by statistical tests,
as well as compatible with upper limits based on {\it Fermi}-LAT data for a
large sample of radio-loud MAGN. We constrain the derived $\gamma$-ray
luminosity function by means of the source count distribution of the radio
galaxies (RGs) detected by the {\it Fermi}-LAT. We finally calculate the
diffuse $\gamma$-ray flux due to the whole MAGN population. Our results
demonstrate that the MAGN can contribute from 10% up to nearly the entire
measured Isotropic Gamma-Ray Background (IGRB). We evaluate a theoretical
uncertainty on the flux of almost an order of magnitude.


title:
Experimental free energy measurements of kinetic molecular states using
  fluctuation theorems

abstract:
  Recent advances in non-equilibrium statistical mechanics and single molecule
technologies make it possible to extract free energy differences from
irreversible work measurements in pulling experiments. To date, free energy
recovery has been focused on native or equilibrium molecular states, whereas
free energy measurements of kinetic states (i.e. finite lifetime states that
are generated dynamically and are metastable) have remained unexplored. Kinetic
states can play an important role in various domains of physics, such as
nanotechnology or condensed matter physics. In biophysics, there are many
examples where they determine the fate of molecular reactions: protein and
peptide-nucleic acid binding, specific cation binding, antigen-antibody
interactions, transient states in enzymatic reactions or the formation of
transient intermediates and non-native structures in molecular folders. Here we
demonstrate that it is possible to obtain free energies of kinetic states by
applying extended fluctuation relations. This is shown by using optical
tweezers to mechanically unfold and refold DNA structures exhibiting
intermediate and misfolded kinetic states.


title:
Herschel/HIFI observations of a new interstellar water maser: the
  5(32)-4(41) transition at 620.701 GHz

abstract:
  Using the Herschel Space Observatory's Heterodyne Instrument for the
Far-Infrared (HIFI), we have performed mapping observations of the 620.701 GHz
5(32)-4(41) transition of ortho-H2O within a roughly 1.5 x 1.5 arcmin region
encompassing the Kleinmann-Low nebula in Orion, and pointed observations of
that transition toward the Orion South condensation and the W49N region of
high-mass star formation. Using the Effelsberg 100 m radio telescope, we
obtained ancillary observations of the 22.23508 GHz 6(16)-5(23) water maser
transition; in the case of Orion-KL, the 621 GHz and 22 GHz observations were
carried out within 10 days of each other. The 621 GHz water line emission shows
clear evidence for strong maser amplication in all three sources, exhibiting
narrow (roughly 1 km/s FWHM) emission features that are coincident
(kinematically and/or spatially) with observed 22 GHz features. Moreover, in
the case of W49N - for which observations were available at three epochs
spanning a two year period - the spectra exhibited variability. The observed
621 GHz/22 GHz line ratios are consistent with a maser pumping model in which
the population inversions arise from the combined effects of collisional
excitation and spontaneous radiative decay, and the inferred physical
conditions can plausibly arise in gas heated by either dissociative or
non-dissociative shocks. The collisional excitation model also predicts that
the 22 GHz population inversion will be quenched at higher densities than that
of the 621 GHz transition, providing a natural explanation for the
observational fact that 22 GHz maser emission appears to be a necessary but
insufficient condition for 621 GHz maser emission.


title: Lattice dynamics in mono- and few-layer sheets of WS2 and WSe2

abstract:
  Thickness is one of the fundamental parameters that define the electronic,
optical, and thermal properties of two-dimensional (2D) crystals. Phonons in
molybdenum disulfide (MoS2) were recently found to exhibit unique thickness
dependence due to interplay between short and long range interactions. Here we
report Raman spectra of atomically thin sheets of WS2 and WSe2 in the mono- to
few-layer thickness regime. We show that, similar to the case of MoS2, the
characteristic and modes exhibit stiffening and softening with increasing
number of layers, respectively, with a small shift of less than 3 cm-1 due to
large mass of the atoms. Thickness dependence is also observed in a series of
multiphonon bands arising from overtone, combination, and zone edge phonons,
whose intensity exhibit significant enhancement in excitonic resonance
conditions. Some of these multiphonon peaks are found to be absent only in
monolayers. These features provide a unique fingerprint and rapid
identification for monolayer flakes.


title: Structures Without Scattered-Automatic Presentation

abstract:
  Bruyere and Carton lifted the notion of finite automata reading infinite
words to finite automata reading words with shape an arbitrary linear order L.
Automata on finite words can be used to represent infinite structures, the
so-called word-automatic structures. Analogously, for a linear order L there is
the class of L-automatic structures. In this paper we prove the following
limitations on the class of L-automatic structures for a fixed L of finite
condensation rank 1+\alpha. Firstly, no scattered linear order with finite
condensation rank above \omega^(\alpha+1) is L-\alpha-automatic. In particular,
every L-automatic ordinal is below \omega^\omega^(\alpha+1). Secondly, we
provide bounds on the (ordinal) height of well-founded order trees that are
L-automatic. If \alpha is finite or L is an ordinal, the height of such a tree
is bounded by \omega^{\alpha+1}. Finally, we separate the class of
tree-automatic structures from that of L-automatic structures for any ordinal
L: the countable atomless boolean algebra is known to be tree-automatic, but we
show that it is not L-automatic.


title: Predicting Network Attacks Using Ontology-Driven Inference

abstract:
  Graph knowledge models and ontologies are very powerful modeling and re
asoning tools. We propose an effective approach to model network attacks and
attack prediction which plays important roles in security management. The goals
of this study are: First we model network attacks, their prerequisites and
consequences using knowledge representation methods in order to provide
description logic reasoning and inference over attack domain concepts. And
secondly, we propose an ontology-based system which predicts potential attacks
using inference and observing information which provided by sensory inputs. We
generate our ontology and evaluate corresponding methods using CAPEC, CWE, and
CVE hierarchical datasets. Results from experiments show significant capability
improvements comparing to traditional hierarchical and relational models.
Proposed method also reduces false alarms and improves intrusion detection
effectiveness.


title: Dynamics and Rheology of Vesicle Suspensions in Wall-Bounded Shear Flow

abstract:
  The dynamics and rheology of suspensions of fluid vesicles or red blood cells
is investigated by a combination of molecular dynamics and mesoscale
hydrodynamics simulations in two dimensions. The vesicle suspension is confined
between two no-slip walls, which are driven externally to generate a shear flow
with shear rate $\dot\gamma$. The flow behavior is studied as a function of
$\dot\gamma$, the volume fraction of vesicles, and the viscosity contrast
between inside and outside fluids. Results are obtained for the encounter and
interactions of two vesicles, the intrinsic viscosity of the suspension, and
the cell-free layer near the walls.


title:
Variability of gamma-ray emission from blazars on the black hole
  timescales

abstract:
  We investigate the variability properties of blazars in the GeV band using
the data of the Fermi/LAT telescope. We find that blazars exhibit variability
on the scales down to the minimal timescale resolvable by Fermi, which is a
function of the peak photon count rate in the LAT. This implies that the real
minimal variability timescales for the majority of blazars are typically
shorter than those resolvable by the LAT. We find that for several blazars
these minimal variability timescales reach those associated to the blazar
central engine, the supermassive black hole. At the same time, none of the
blazars exhibits variability on the timescale shorter than the black hole
horizon light crossing time and/or the period of rotation around the last
stable circular orbit. Based on this fact, we argue that the timing properties
of the gamma-ray signal could be determined by the processes in the direct
vicinity of the supermassive black hole.


title:
An estimation of the effective number of electrons contributing to the
  coordinate measurement with a TPC II

abstract:
  For time projection chambers (TPCs) the accuracy in measurement of the track
coordinates along the pad-row direction deteriorates with the drift distance
(z): Resolution**2 = D**2 * z / N_eff, where D is the diffusion constant and
N_eff is the effective number of electrons. Experimentally it has been shown
that N_eff is smaller than the average number of drift electrons per pad row
(<N>). In the previous work we estimated N_eff by means of a simple numerical
simulation for argon-based gas mixtures, taking into account the diffusion of
electrons only in the pad-row direction [1]. The simulation showed that N_eff
could be as small as 30% of <N> because of the combined effect of statistical
fluctuations in the number of drift electrons (N) and in their multiplication
in avalanches. In this paper, we evaluate the influence of the diffusion normal
to the pad-row direction on the effective number of electrons. The
de-clustering of the drift electrons due to the diffusion makes N_eff
drift-distance dependent. However, its effect was found to be too small to
explain the discrepancy between the values of N_eff measured with two TPC
prototypes different in size.


title: A Succinct Grammar Compression

abstract:
  We solve an open problem related to an optimal encoding of a straight line
program (SLP), a canonical form of grammar compression deriving a single string
deterministically. We show that an information-theoretic lower bound for
representing an SLP with n symbols requires at least 2n+logn!+o(n) bits. We
then present a succinct representation of an SLP; this representation is
asymptotically equivalent to the lower bound. The space is at most 2n log
{rho}(1 + o(1)) bits for rho leq 2sqrt{n}, while supporting random access to
any production rule of an SLP in O(log log n) time. In addition, we present a
novel dynamic data structure associating a digram with a unique symbol. Such a
data structure is called a naming function and has been implemented using a
hash table that has a space-time tradeoff. Thus, the memory space is mainly
occupied by the hash table during the development of production rules.
Alternatively, we build a dynamic data structure for the naming function by
leveraging the idea behind the wavelet tree. The space is strictly bounded by
2n log n(1 + o(1)) bits, while supporting O(log n) query and update time.


title:
Energy and contact of the one-dimensional Fermi polaron at zero and
  finite temperature

abstract:
  We use the T-matrix approach for studying highly polarized homogeneous Fermi
gases in one dimension with repulsive or attractive contact interactions. Using
this approach, we compute ground state energies and values for the contact
parameter that show excellent agreement with exact and other numerical methods
at zero temperature, even in the strongly interacting regime. Furthermore, we
derive an exact expression for the value of the contact parameter in one
dimension at zero temperature. The model is then extended and used for studying
the temperature dependence of ground state energies and the contact parameter.


title: Universal formula for the muon-induced neutron yield

abstract:
  The experimental data on the yield of muon-induced neutrons for liquid
scintillator, iron and lead accumulated during 60 years of muon interaction
underground study have been analyzed. A universal formula connecting the yield
with muon energy loss in the matter and neutron production in hadronic and
electromagnetic showers is presented.


title: Information-Preserving Markov Aggregation

abstract:
  We present a sufficient condition for a non-injective function of a Markov
chain to be a second-order Markov chain with the same entropy rate as the
original chain. This permits an information-preserving state space reduction by
merging states or, equivalently, lossless compression of a Markov source on a
sample-by-sample basis. The cardinality of the reduced state space is bounded
from below by the node degrees of the transition graph associated with the
original Markov chain.
  We also present an algorithm listing all possible information-preserving
state space reductions, for a given transition graph. We illustrate our results
by applying the algorithm to a bi-gram letter model of an English text.


title: Spontaneous CP Violation in $A_4$ Flavor Symmetry and Leptogenesis

abstract:
  We propose a simple renormalizable model for the spontaneous CP violation
based on $SU(2)_{L}\times U(1)_{Y}\times A_{4}$ symmetry in a radiative seesaw
mechanism, which can be guaranteed by an extra $Z_{2}$ symmetry. In our model
CP is spontaneously broken at high energies, after breaking of flavor symmetry,
by a complex vacuum expectation value of $A_{4}$-triplet and gauge singlet
scalar field. We show that the spontaneously generated CP phase could become a
natural source of leptogenesis, %CP violation for neutrino oscillation and
leptogenesis, respectively. Then, and also investigate CP violation at low
energies in the lepton sector and show how the CP phases in PMNS could be
arisen through spontaneous symmetry breaking mechanism.
  As a numerical study, interestingly, we show that the normal mass hierarchy
favors relatively large values of $\theta_{13}$, large deviations from
maximality of $\theta_{23}<\pi/4$ and Dirac-CP phase
$0^{\circ}\leq\delta_{CP}\leq50^{\circ}$ and
$300^{\circ}\leq\delta_{CP}\leq360^{\circ}$. For the inverted hierarchy case,
the experimentally measured values of $\theta_{13}$ favors $\theta_{23}>\pi/4$
and discrete values of $\delta_{CP}$ around
$100^{\circ},135^{\circ},255^{\circ}$ and $300^{\circ}$. Finally, with a
successful leptogenesis our numerical results give more predictive values on
the Dirac CP phase: for the normal mass hierarchy
$1^{\circ}\lesssim\delta_{CP}\lesssim10^{\circ}$ and for inverted one
$\delta_{CP}\sim100^{\circ},135^{\circ},300^{\circ}$.


title: Isocurvature Constraints and Anharmonic Effects on QCD Axion Dark Matter

abstract:
  We revisit the isocurvature density perturbations induced by quantum
fluctuations of the axion field by extending a recently developed analytic
method and approximations to a time-dependent scalar potential, which enables
us to follow the evolution of the axion until it starts to oscillate. We find
that, as the initial misalignment angle approaches the hilltop of the
potential, the isocurvature perturbations become significantly enhanced, while
the non-Gaussianity parameter increases slowly but surely. As a result, the
isocurvature constraint on the inflation scale is tightened as Hinf < O(100)
GeV for the axion decay constant fa < 10^10 GeV, near the smaller end of the
axion dark matter window. We also derive useful formulae for the power spectrum
and non-Gaussianity of the isocurvature perturbations.


title:
Information, no-arbitrage and completeness for asset price models with a
  change point

abstract:
  We consider a general class of continuous asset price models where the drift
and the volatility functions, as well as the driving Brownian motions, change
at a random time $\tau$. Under minimal assumptions on the random time and on
the driving Brownian motions, we study the behavior of the model in all the
filtrations which naturally arise in this setting, establishing martingale
representation results and characterizing the validity of the NA1 and NFLVR
no-arbitrage conditions.


title: A model of H-NS mediated compaction of bacterial DNA

abstract:
  The Histone-like Nucleoid Structuring protein (H-NS) is a nucleoid-associated
protein, which is involved in both gene regulation and DNA compaction. H-NS can
bind to DNA in two different ways: in trans, by binding to two separate DNA
duplexes, or in cis, by binding to different sites on the same duplex. Based on
scanning force microscopy imaging and optical trap-driven unzipping assays, it
has recently been suggested that DNA compaction may result from the
antagonistic effects of H-NS binding to DNA in trans and cis configurations. In
order to get more insight into the compaction mechanism, we constructed a
coarse-grained model description of the compaction of bacterial DNA by H-NS.
These simulations highlight the fact that DNA compaction indeed results from
the subtle equilibrium between several competing factors, which include the
deformation dynamics of the plasmid and the several binding modes of protein
dimers to DNA, i.e. dangling configurations, cis- and trans-binding. In
particular, the degree of compaction is extremely sensitive to the difference
in binding energies of the cis and trans configurations. Our simulations also
point out that the conformations of the DNA-protein complexes are significantly
different in bulk and in planar conditions, suggesting that conformations
observed on mica surfaces may differ significantly from those that prevail in
living cells.


title:
A new approach to multi-modal diffusions with applications to protein
  folding

abstract:
  This article demonstrates that flexible and statistically tractable
multi-modal diffusion models can be attained by transformation of simple
well-known diffusion models such as the Ornstein-Uhlenbeck model, or more
generally a Pearson diffusion. The transformed diffusion inherits many
properties of the underlying simple diffusion including its mixing rates and
distributions of first passage times. Likelihood inference and martingale
estimating functions are considered in the case of a discretely observed
bimodal diffusion. It is further demonstrated that model parameters can be
identified and estimated when the diffusion is observed with additional
measurement error. The new approach is applied to molecular dynamics data in
form of a reaction coordinate of the small Trp-zipper protein, for which the
folding and unfolding rates are estimated. The new models provide a better fit
to this type of protein folding data than previous models because the diffusion
coefficient is state-dependent.


title: Mean curvature flow of mean convex hypersurfaces

abstract:
  In the last 15 years, White and Huisken-Sinestrari developed a far-reaching
structure theory for the mean curvature flow of mean convex hypersurfaces.
Their papers provide a package of estimates and structural results that yield a
precise description of singularities and of high curvature regions in a mean
convex flow. In the present paper, we give a new treatment of the theory of
mean convex (and k-convex) flows. This includes: (1) an estimate for
derivatives of curvatures, (2) a convexity estimate, (3) a cylindrical
estimate, (4) a global convergence theorem, (5) a structure theorem for ancient
solutions, and (6) a partial regularity theorem. Our new proofs are both more
elementary and substantially shorter than the original arguments. Our estimates
are local and universal. A key ingredient in our new approach is the new non-
collapsing result of Andrews. Some parts are also inspired by the work of
Perelman. In a forthcoming paper, we will give a new construction of mean
curvature flow with surgery based on the theorems established in the present
paper.


title:
About the creation of proton-anti-proton pair at electron-positron
  collider in the energy range of the mass $\Psi(3770)$

abstract:
  The process of electron--positron annihilation into proton--antiproton pair
is considered within the vicinity of $\psi(3770)$ resonance. The interference
between the pure electromagnetic intermediate state and the $\psi(3770)$ state
is evaluated. It is shown that this interference is destructive and the
relative phase between these two contributions is large ($\phi_0 \approx
250^o$).


title:
Evaluation of the escape widths of the giant dipole resonances in the
  fermi-liquid theory

abstract:
  In the theory of the finite fermi-systems [1], it was shown that giant
resonances in nuclei can be consider as the zero-sound excitations which
exhaust the large part of the energy-weighted sum rules. In the framework of
[1] the solutions of the zero-sound dispersion equation in the symmetric
nuclear matter, \omega_s(k), are considered. The method of calculation of these
solutions is based on the analytical structure of the polarization operators
\Pi(\omega,k). The solutions of the dispersion equation, which are real at
small k, become complex with k increasing when the overlapping of the
collective and 1p1h modes starts. The imaginary part of \omega_s(k) is the
result of the collective zero-sound excitation decay to the real particle-hole
pairs and can be compared with the escape width of resonances. We compare the
experimental energy and escape width of the giant dipole resonance (GDR) in the
nucleus A with Re\omega_s(k) and Im\omega_s(k) taken at a definite wave vector
k=k_A.


title: Proton-rich nucleosynthesis and nuclear physics

abstract:
  Although the detailed conditions for explosive nucleosynthesis are derived
from astrophysical modeling, nuclear physics determines fundamental patterns in
abundance yields, not only for equilibrium processes. Focussing on the nu-p-
and the gamma-process, general nucleosynthesis features within the range of
astrophysical models, but (mostly) independent of details in the modelling, are
presented. Remaining uncertainties due to uncertain Q-values and reaction rates
are discussed.


title:
L'-band AGPM vector vortex coronagraph's first light on VLT/NACO:
  Discovery of a late-type companion at two beamwidths from an F0V star

abstract:
  Context. High contrast imaging has thoroughly combed through the limited
search space accessible with first-generation ground-based adaptive optics
instruments and the Hubble Space Telescope. Only a few objects were discovered,
and many non-detections reported and statistically interpreted. The field is
now in need of a technological breakthrough.
  Aim. Our aim is to open a new search space with first-generation systems such
as NACO at the Very Large Telescope, by providing ground-breaking inner working
angle (IWA) capabilities in the L' band. The L' band is a sweet spot for high
contrast coronagraphy since the planet-to-star brightness ratio is favorable,
while the Strehl ratio is naturally higher.
  Methods. An annular groove phase mask (AGPM) vector vortex coronagraph
optimized for the L' band, made from diamond subwavelength gratings was
manufactured and qualified in the lab. The AGPM enables high contrast imaging
at very small IWA, potentially being the key to unexplored discovery space.
  Results. Here we present the installation and successful on-sky tests of an
L'-band AGPM coronagraph on NACO. Using angular differential imaging, which is
well suited to the rotational symmetry of the AGPM, we demonstrated a \Delta L'
> 7.5 mag contrast from an IWA ~ 0".09 onwards, during average seeing
conditions, and for total integration times of a few hundred seconds.


title: Parameters of galactic disks at optical and NIR wavelengths

abstract:
  We have analyzed the radial scales, central surface brightnesses, and colors
of 404 disks of various types of galaxies. The central surface brightness mu0
and linear disk scale length h vary smoothly along the Hubble sequence of
galaxies within a rather narrow interval. The disks of relatively early type
galaxies display higher central surface brightnesses in K, higher central
surface densities, smaller sizes (relative to the diameter of the galaxy),
redder integrated and central colors. The color gradient normalized to the
radius of the galaxy and the blue central surface brightness mu0_{0,i}(B) of
the disk, are both independent of the galaxy type. The radial disk scales in
different photometric bands differ less in early-type than in late-type
galaxies. The ratio of linear disk scales measured in different photometric
bands increases with the isophote ellipticity e of the disk (the inclination of
the galaxy); however, the range of the ratio values for each e value exceeds
the range of variations of scale lengths ratio over e. The disks in S0 galaxies
have more homogeneous parameters than those in spiral galaxies. However, no
sharp boundary in the properties of disks in lenticular, spiral, and irregular
galaxies has been found; all parameters vary smoothly along the Hubble
sequence. A correlation between the central disk surface brightness and the
total luminosity of the galaxy is observed. We also consider the influence of
dust on the photometric parameters of the disks. We show that the dust
concentrated in dust lines towards the spiral arms and bars does not influence
to the scale lengths ratio.


title:
Three dimensional complex plasma structures in a combined radio
  frequency and direct current discharge

abstract:
  We report on the first detailed analysis of large three dimensional (3D)
complex plasma structures in experiments performed in pure rf and combined
rf+dc discharge modes. Inductively coupled plasma (ICP) is generated by an rf
coil wrapped around the vertically positioned cylindrical glass tube at a
pressure of 0.3 mbar. In addition, dc plasma can be generated by applying
voltage to the electrodes at the ends of the tube far from the rf coil. The
injected monodisperse particles are levitated in the plasma below the coil. A
scanning laser sheet and a high resolution camera are used to determine the 3D
positions of about $10^5$ particles. The observed bowl-shaped particle clouds
reveal coexistence of various structures, including well-distinguished
solid-like, less ordered liquid-like, and pronounced string-like phases. New
criteria to identify string-like structures are proposed.


title:
Pullback exponential attractors for a Cahn-Hilliard-Navier-Stokes system
  in 2D

abstract:
  We consider a model for the evolution of a mixture of two incompressible and
partially immiscible Newtonian fluids in two dimensional bounded domain. More
precisely, we address the well-known model H consisting of the Navier-Stokes
equation with non-autonomous external forcing term for the (average) fluid
velocity, coupled with a convective Cahn-Hilliard equation with polynomial
double-well potential describing the evolution of the relative density of atoms
of one of the fluids. We study the long term behavior of solutions and prove
that the system possesses a pullback exponential attractor. In particular the
regularity estimates we obtain depend on the initial data only through fixed
powers of their norms and these powers are uniform with respect to the growth
of the polynomial potential considered in the Cahn-Hilliard equation.


title:
Topologically protected quantum transport in locally exfoliated bismuth
  at room temperature

abstract:
  We report electrical conductance measurements of Bi nanocontacts created by
repeated tip-surface indentation using a scanning tunneling microscope at
temperatures of 4 K and 300 K. As a function of the elongation of the
nanocontact we measure robust, tens of nanometers long plateaus of conductance
G0 = 2e^2/h at room temperature. This observation can be accounted for by the
mechanical exfoliation of a Bi(111) bilayer, a predicted QSH insulator, in the
retracing process following a tip-surface contact. The formation of the bilayer
is further supported by the additional observation of conductance steps below
G0 before break-up at both temperatures. Our finding provides the first
experimental evidence of the possibility of mechanical exfoliation of Bi
bilayers, of the existence of the QSH phase in a two-dimensional crystal, and,
most importantly, of the observation of the QSH phase at room temperature.


title:
Topology across the finite temperature transition studied by
  overimproved cooling in gluodynamics and QCD

abstract:
  Gluodynamics and two-flavor QCD at non-zero temperature are studied with the
so-called overimproved cooling technique under which caloron solutions may
remain stable. We consider topological configurations either at the first
occuring stable plateau of topological charge or at the first (anti)selfdual
plateau and find the corresponding topological susceptibility at various
temperatures on both sides of the thermal transition or crossover. In pure
gluodynamics the topological susceptibility drops sharply at the deconfinement
temperature while in full QCD it decreases smoothly at temperatures above the
pseudocritical one. The results are close to those calculated by other methods.
We interpret our findings in terms of the (in)stability of calorons with
non-trivial holonomy and their dyon constituents against overimproved cooling.


title:
On the existence of representations of finitely presented groups in
  compact Lie groups

abstract:
  Given a finite, connected 2-complex $X$ such that $b_2(X)\le1$ we establish
two existence results for representations of the fundamental group of $X$ into
compact connected Lie groups $G$, with prescribed values on certain loops. If
$b_2(X)=1$ we assume $G=SO(3)$ and that the cup product on the first rational
cohomology group of $X$ is non-zero.


title: Quintic periods and stability conditions via homological mirror symmetry

abstract:
  For the Fermat Calabi-Yau threefold and the theory of stability conditions
[Bri07], there have been two mathematical aims given by physical reasoning. One
is that we should define stability conditions by central charges of quintic
periods [Hos04,Kon12,KonSoi13], which extend the Gamma class [KKP,Iri09,Iri11].
The other is that for well-motivated stability conditions on a derived
Fukaya-type category, each stable object should be a Lagrangian [ThoYau].
  We answer affirmatively to these aims with the simplest homological mirror
symmetry (HMS for short) of the Fermat Calabi-Yau threefold [Oka09,FutUed] and
stability conditions of Bridgeland type, which we introduce. With HMS, we
naturally obtain stability conditions of Bridgeland type by the monodromy
around the Gepner point.
  As consequences, we obtain bases of quintic periods and the mirror map [CdGP]
categorically, wall-crossings by quintic periods, and a quasimodular form
[KanZag] attached to quintic periods by motivic Donaldson-Thomas invariants
[KonSoi08]. The quasimodular form is of the quantum dilogarithm and of a mock
modular form [Zag06].


title: Drag coefficient for the air-sea exchange in hurricane conditions

abstract:
  A physical model is proposed for the prediction of the non-monotonic
variation of the drag coefficient, C_d, with wind speed. The model approximates
the effective C_d by the area-weighted averaging of the distinct drag
coefficients associated with the foam-free and foam totally-covered portions of
the sea surface, and identifies the roughness of the sea surface totally
covered by foam with the foam bubble size. Based on the available optical and
radiometric measurements of the foam fractional coverage and the foam bubble
size, the present model yields the effective C_d which is in fair agreement
with that obtained from field measurements of the vertical variation of mean
wind speed (Powell et al., 2003), which showed a reduction of C_d with wind
speed rising to hurricane conditions. The present approach opens new
opportunities for modeling of drag coefficient in hurricane conditions by using
radiometric measurements instead of direct wind speed measurements.


title: Twisted equivariant K- Theory and K-Homology of Sl3(Z)

abstract:
  Replaces Previous version. Includes comments on poincare duality for twisted
equivariant in the context of proper and discrete actions and the Baum-Connes
Conjecture. We use a spectral sequence proposed by C. Dwyer and previous work
by Sanchez-Garcia and Soule to compute Twisted Equivariant K-theory groups of
the classifying space for proper actions of Sl3(Z). After proving a Universal
coefficient theorem in Bredon Cohomology with specific coefficients, we compute
the twisted equivariant K-homology and state a relation to the Baum-Connes
Conjecture with coefficients.


title:
Differential Geometry applied to Acoustics : Non Linear Propagation in
  Reissner Beams

abstract:
  Although acoustics is one of the disciplines of mechanics, its
"geometrization" is still limited to a few areas. As shown in the work on
nonlinear propagation in Reissner beams, it seems that an interpretation of the
theories of acoustics through the concepts of differential geometry can help to
address the non-linear phenomena in their intrinsic qualities. This results in
a field of research aimed at establishing and solving dynamic models purged of
any artificial nonlinearity by taking advantage of symmetry properties
underlying the use of Lie groups. The geometric constructions needed for
reduction are presented in the context of the "covariant" approach.


title:
Recovery of Sparse Signals via Generalized Orthogonal Matching Pursuit:
  A New Analysis

abstract:
  As an extension of orthogonal matching pursuit (OMP) improving the recovery
performance of sparse signals, generalized OMP (gOMP) has recently been studied
in the literature. In this paper, we present a new analysis of the gOMP
algorithm using restricted isometry property (RIP). We show that if the
measurement matrix $\mathbf{\Phi} \in \mathcal{R}^{m \times n}$ satisfies the
RIP with $$\delta_{\max \left\{9, S + 1 \right\}K} \leq \frac{1}{8},$$ then
gOMP performs stable reconstruction of all $K$-sparse signals $\mathbf{x} \in
\mathcal{R}^n$ from the noisy measurements $\mathbf{y} = \mathbf{\Phi x} +
\mathbf{v}$ within $\max \left\{K, \left\lfloor \frac{8K}{S} \right\rfloor
\right\}$ iterations where $\mathbf{v}$ is the noise vector and $S$ is the
number of indices chosen in each iteration of the gOMP algorithm. For Gaussian
random measurements, our results indicate that the number of required
measurements is essentially $m = \mathcal{O}(K \log \frac{n}{K})$, which is a
significant improvement over the existing result $m = \mathcal{O}(K^2 \log
\frac{n}{K})$, especially for large $K$.


title:
Pseudolikelihood Decimation Algorithm Improving the Inference of the
  Interaction Network in a General Class of Ising Models

abstract:
  In this Letter we propose a new method to infer the topology of the
interaction network in pairwise models with Ising variables. By using the
pseudolikelihood method (PLM) at high temperature, it is generally possible to
distinguish between zero and nonzero couplings because a clear gap separate the
two groups. However at lower temperatures the PLM is much less effective and
the result depends on subjective choices, such as the value of the $\ell_1$
regularizer and that of the threshold to separate nonzero couplings from null
ones. We introduce a decimation procedure based on the PLM that recursively
sets to zero the less significant couplings, until the variation of the
pseudolikelihood signals that relevant couplings are being removed. The new
method is fully automated and does not require any subjective choice by the
user. Numerical tests have been performed on a wide class of Ising models,
having different topologies (from random graphs to finite dimensional lattices)
and different couplings (both diluted ferromagnets in a field and spin
glasses). These numerical results show that the new algorithm performs better
than standard PLM


title: General regularization schemes for signal detection in inverse problems

abstract:
  The authors discuss how general regularization schemes, in particular linear
regularization schemes and projection schemes, can be used to design tests for
signal detection in statistical inverse problems. It is shown that such tests
can attain the minimax separation rates when the regularization parameter is
chosen appropriately. It is also shown how to modify these tests in order to
obtain (up to a $\log\log$ factor) a test which adapts to the unknown
smoothness in the alternative. Moreover, the authors discuss how the so-called
\emph{direct} and \emph{indirect} tests are related via interpolation
properties.


title: Universality of TMD distribution functions of definite rank

abstract:
  Transverse momentum dependent (TMD) distribution and fragmentation functions
are described as Fourier transforms of matrix elementscontaining nonlocal
combinations of quark and gluon fields. These matrix elements also contain a
gauge link operator with a process dependent path, of which the process
dependence that can be traced back to the color flow in the process. Expanding
into irreducible tensors built from the transverse momenta $p_\st$, we can
define a universal set of TMD correlators of definite rank with a well-defined
operator structure.


title: Convergence theorems for graph sequences

abstract:
  In this paper, we deal with a notion of Banach space-valued mappings defined
on a set consisting of finite graphs with uniformly bounded vertex degree.
These functions will be endowed with certain boundedness and additivity
criteria. We examine their normalized long-term behaviour along a particular
class of graph sequences. Using techniques developed by Elek, we show
convergence in the topology of the Banach space if the corresponding graph
sequence possesses a hyperfinite structure. These considerations extend and
complement the corresponding results for amenable groups. As an application, we
verify the uniform approximation of the integrated density of states for
bounded, finite range operators on discrete structures. Further, we extend
results concerning an abstract version of Fekete's Lemma for amenable groups
and cancellative semigroups to the geometric situation of convergent graph
sequences.


title: The dominant imprint of Rossby waves in the climate network

abstract:
  The connectivity pattern of networks, which are based on a correlation
between ground level temperature time series, shows a dominant dense stripe of
links in the southern ocean. We show that statistical categorization of these
links yields a clear association with the pattern of an atmospheric Rossby
wave, one of the major mechanisms associated with the weather system and with
planetary scale energy transport. It is shown that alternating densities of
negative and positive links (correlations) are arranged in half Rossby wave
distances around 3,500 km, 7,000 km and 10,000 km and are aligned with the
expected direction of energy flow, distribution of time delays and the
seasonality of these waves. It is also shown that long distance links (i.e., of
distances larger than 2,000 km) that are associated with Rossby waves are the
most dominant in the climate network. Climate networks may thus be used as an
efficient new way to detect and analyze Rossby waves, based on reliable and
available ground level measurements, in addition to the frequently used 300 hPa
reanalysis meridional wind data.


title: Quillen property of real algebraic varieties

abstract:
  Let I be a conjugation-invariant ideal in the complex polynomial ring with
variables z_1,...,z_n and their conjugates. The ideal I has the Quillen
property if every real valued, strictly positive polynomial on the real zero
set of I in C^n is a sum of hermitian squares modulo I. We first relate the
Quillen property to the archimedean property from real algebra. Using
hereditary calculus, we then quantize and show that the Quillen property
implies the subnormality of commuting tuples of Hilbert space operators
satisfying the identities in I. In the finite rank case we give a complete
geometric characterization of when the identities in $I$ imply normality for a
commuting tuple of matrices. This geometric interpretation provides simple
means to refute Quillen's property of an ideal. We also generalize these
notions and results from real algebraic sets to semi-algebraic sets in C^n.


title:
Scaling laws of the cavity enhancement for nitrogen-vacancy centers in
  diamond

abstract:
  We employ a fiber-based optical microcavity with high finesse to study the
enhancement of phonon sideband fluorescence of nitrogen-vacancy centers in
nanodiamonds. Harnessing the full tunability and open access of the resonator,
we explicitly demonstrate the scaling laws of the Purcell enhancement by
varying both the mode volume and the quality factor over a large range. While
changes in the emission lifetime remain small in the regime of a broadband
emitter, we observe an increase of the emission spectral density by up to a
factor of 300. This gives a direct measure of the Purcell factor that could be
achieved with this resonator and an emitter whose linewidth is narrower than
the cavity linewidth. Our results show a method for the realization of
wavelength-tunable narrow-band single-photon sources and demonstrate a system
that has the potential to reach the strong-coupling regime.


title:
Extremal set theory, cubic forms on $\mathbb{F}_2^n$ and Hurwitz square
  identities

abstract:
  We consider a family, $\mathcal{F}$, of subsets of an $n$-set such that the
cardinality of the symmetric difference of any two elements
$F,F'\in\mathcal{F}$ is not a multiple of 4. We prove that the maximal size of
$\mathcal{F}$ is bounded by $2n$, unless $n\equiv{}3\mod4$ when it is bounded
by $2n+2$. Our method uses cubic forms on $\mathbb{F}_2^n$ and the
Hurwitz-Radon theory of square identities. We also apply this theory to obtain
some information about boolean cubic forms and so-called additive quadruples.


title:
Interplay of Aharonov-Bohm and Berry phases in gate-defined graphene
  quantum dots

abstract:
  We study the influence of a magnetic flux tube on the possibility to
electrostatically confine electrons in a graphene quantum dot. Without magnetic
flux tube, the graphene pseudospin is responsible for a quantization of the
total angular momentum to half-integer values. On the other hand, with a flux
tube containing half a flux quantum, the Aharonov-Bohm phase and Berry phase
precisely cancel, and we find a state at zero angular momentum that cannot be
confined electrostatically. In this case, true bound states only exist in
regular geometries for which states without zero-angular-momentum component
exist, while non-integrable geometries lack confinement. We support these
arguments with a calculation of the two-terminal conductance of a gate-defined
graphene quantum dot, which shows resonances for a disc-shaped geometry and for
a stadium-shaped geometry without flux tube, but no resonances for a
stadium-shaped quantum dot with a $\pi$-flux tube.


title: Testing the bootstrap constraints in the strange sector

abstract:
  In this paper the bootstrap conditions that follow from the general
postulates of effective scattering theory (EST) are checked in the strange
sector. We construct the system of tree level bootstrap constraints for the
renormalization prescriptions fixing the physical content of the theory. Then
we perform the numerical testing of corresponding sum rules for the parameters
of strange resonances. It is shown that, generally, the bootstrap constraints
turn out consistent with presently known data on the strange resonance
parameters. At the same time we point out few sum rules which cannot be
saturated with modern data and discuss the possible reasons for such
discrepancies.


title:
Study of \Sigma(1385) and \Xi(1321) hyperon and antihyperon production
  in deep inelastic muon scattering

abstract:
  Large samples of \Lambda, \Sigma(1385) and \Xi(1321) hyperons produced in
deep-inelastic muon scattering off a ^6LiD target were collected with the
COMPASS experimental setup at CERN. The relative yields of \Sigma(1385)^+,
\Sigma(1385)^-, \bar{\Sigma}(1385)^-, \bar{\Sigma}(1385)^+, \Xi(1321)^-, and
\bar{\Xi}(1321)^+ hyperons decaying into \Lambda(\bar{\Lambda})\pi were
measured. The heavy hyperon to \Lambda and heavy antihyperon to \bar{\Lambda}
yield ratios were found to be in the range 3.8% to 5.6% with a relative
uncertainty of about 10%. They were used to tune the parameters relevant for
strange particle production of the LEPTO Monte Carlo generator.


title:
Revealing the Complex Transport Behaviors in Warm Dense Hydrogen by
  Including Nuclear Quantum Effects

abstract:
  Nuclear quantum effects (NQEs) on the structures and transport properties of
dense liquid hydrogen at densities of 10-100 g/cm3 and temperatures of 0.1-1 eV
are fully assessed using \textit{ab initio} path-integral molecular dynamics
simulations. With the inclusion of NQEs, ionic diffusions are strongly enhanced
by the magnitude from 100% to 15% with increasing temperature, while electrical
conductivities are significantly suppressed. The analyses of ionic structures
and zero-point energy show also the importance of NQEs in these regime. The
significant quantum delocalization of ions introduces expressively different
scattering cross section between protons compared with classical particle
treatments, which can explain the large alterability of transport behaviors.
Furthermore, the energy, pressure, and isotope effects are also greatly
influenced by NQEs. The complex behaviors show that NQEs can not be neglected
for dense hydrogen even in the warm dense regime.


title: Labeling and Retrieval of Emotionally-Annotated Images using WordNet

abstract:
  Repositories of images with semantic and emotion content descriptions are
valuable tools in many areas such as Affective Computing and Human-Computer
Interaction, but they are also important in the development of multimodal
searchable online databases. Ever growing number of image documents available
on the Internet continuously motivates research of better annotation models and
more efficient retrieval methods which use mash-up of available data on
semantics, scenes, objects, events, context and emotion. Formal knowledge
representation of such high-level semantics requires rich, explicit, human but
also machine-processable information. To achieve these goals we present an
online ontology-based image annotation tool WNtags and demonstrate its
usefulness in knowledge representation and image retrieval using the
International Affective Picture System database. The WNtags uses WordNet as
image tagging glossary but considers Suggested Upper Merged Ontology as the
preferred upper labeling formalism. The retrieval is performed using node
distance metrics to establish semantic relatedness between a query and the
collaboratively weighted tags describing high-level image semantics, after
which the result is ranked according to the derived importance. We also
elaborate plans to improve the WNtags to create a collaborative Web-based
multimedia repository for research in human emotion and attention.


title:
Investigation of quantum-dimensional structure parameters by X-ray
  optical, scanning tunneling and transmission electron microscopy

abstract:
  Application of the two-wavelength X-ray reflectometry to exploration of
Ge/Si(001) hereostructures with dense chains of stacked Ge quantum dots is
presented


title: k-Dirac operator and Cartan-Kahler theorem

abstract:
  We apply the Cartan-Kahler theorem for the k-Dirac operator studied in
Clifford analysis and to the parabolic version of this operator. We show that
for k = 2 the tableaux of the first prolongations of these two operators are
involutive. This gives us a new characterization of the set of initial
conditions for the 2-Dirac operator.


title: Oscillatory motion of sheared nanorods beyond the nematic phase

abstract:
  We study the role of the control parameter triggering nematic order
(temperature or concentration) on the dynamical behavior of a system of
nanorods under shear. Our study is based on a set of mesoscopic equations of
motion for the components of the tensorial orientational order parameter. We
investigating these equations via a systematic bifurcation analysis based on a
numerical continuation technique, focusing on spatially homogeneous states.
Exploring a wide range of parameters we find, unexpectedly, that states with
oscillatory motion can exist even under conditions where the equilibrium system
is isotropic. These oscillatory states are characterized by wagging motion of
the paranematic director, and they occur if the tumbling parameter is
sufficiently small. We also present full non-equilibrium phase diagrams, in the
plane spanned by the concentration and the shear rate.


title: Representation theorems in modal logic using algebraic logic

abstract: We prove several representation theorems for infinitary predicate modal logic


title: Conditional Tables in practice

abstract:
  Due to the ever increasing importance of the internet, interoperability of
heterogeneous data sources is as well of ever increasing importance.
Interoperability can be achieved e.g. through data integration and data
exchange. Common to both approaches is the need for the DBMS to be able to
store and query incomplete databases. In this report we present PossDB, a DBMS
capable of storing and querying incomplete databases. The system is wrapper
over PostgreSQL, and the query language is an extension of a subset of standard
SQL. Our experimental results show that our system scales well, actually better
than comparable systems.


title:
Parametric (quasi-Cherenkov) cooperative radiation produced by electron
  bunches in natural or photonic crystals

abstract:
  We use numerical modeling to study the features of parametric
(quasi-Cherenkov) cooperative radiation arising when an electron bunch passes
through a crystal (natural or artificial) under the conditions of dynamical
diffraction of electromagnetic waves in the presence of shot noise. It is shown
that in both Laue and Bragg diffraction cases, parametric radiation consists of
two strong pulses: one emitted at small angles with respect to the particle
velocity direction and the other emitted at large angles to it. Under Bragg
diffraction conditions, the intensity of parametric radiation emitted at small
angles to the particle velocity direction reaches saturation at sufficiently
smaller number of particles than the intensity of parametric radiation emitted
at large angles. Under Laue diffraction conditions, every pulse contains two
strong peaks, which are associated with the emission of electromagnetic waves
at the front and back ends of the bunch. The presence of noise causes a chaotic
signal in the interval between the two peaks.


title: Gauge invariant bound state equations for quark-antiquark systems in QCD

abstract:
  Using gauge invariant quark Green's functions, defined with path-ordered
gluon field phase factors along polygonal lines, and functional relations among
them, two compatible bound state equations of the Dirac type are established
for quark-antiquark systems, each relative to the quark or to the antiquark of
the system. The kernels of the bound state equations are defined through a
series of Wilson loop averages along closed polygonal contours and their
functional derivatives on them. A sufficient criterion for spontaneous chiral
symmetry breaking is derived, relating the Goldstone boson wave function in the
zero total momentum limit with the scalar part of the gauge invariant quark
two-point Green's function.


title: Black hole formation in the early universe

abstract:
  Supermassive black holes with up to a $\rm 10^{9}~M_{\odot}$ dwell in the
centers of present-day galaxies, and their presence has been confirmed at z
$\geq$ 6. Their formation at such early epochs is still an enigma. Different
pathways have been suggested to assemble supermassive black holes in the first
billion years after the Big Bang. Direct collapse has emerged as a highly
plausible scenario to form black holes as it provides seed masses of $\rm
10^{5}-10^{6}~M_{\odot}$. Gravitational collapse in atomic cooling haloes with
virial temperatures T$_{vir} \geq 10^{4}$~K may lead to the formation of
massive seed black holes in the presence of an intense background UV flux.
Turbulence plays a central role in regulating accretion and transporting
angular momentum. We present here the highest resolution cosmological
large-eddy simulations to date which track the evolution of high-density
regions on scales of $0.25$~AU beyond the formation of the first peak, and
study the impact of subgrid-scale turbulence. The peak density reached in these
simulations is $\rm 1.2 \times 10^{-8}~g~cm^{-3}$. Our findings show that while
fragmentation occasionally occurs, it does not prevent the growth of a central
massive object resulting from turbulent accretion and occasional mergers. The
central object reaches $\rm \sim 1000~M_{\odot}$ within $4$ free-fall times,
and we expect further growth up to $\rm 10^{6}~M_{\odot}$ through accretion in
about 1 million years. The direct collapse model thus provides a viable pathway
of forming high-mass black holes at early cosmic times.


title:
Light emission and finite frequency shot noise in molecular junctions:
  from tunneling to contact

abstract:
  Scanning tunneling microscope induced light emission from an atomic or
molecular junction has been probed from the tunneling to contact regime in
recent experiments. There, the intensity of the light emission shows strong
correlation with the current/charge fluctuations at optical frequencies. We
show that this is consistent with the established theory in the tunneling
regime, by writing the finite-frequency shot noise as a sum of inelastic
transitions between different electronic states. Based on this, we develop a
practical scheme to perform calculations on realistic structures using Green's
functions. The photon emission yields obtained re-produce the essential feature
of the experiments.


title: Two energy scales of spin dimers in clinoclase Cu3(AsO4)(OH)3

abstract:
  Magnetic susceptibility and microscopic magnetic model of the mineral
clinoclase Cu3(AsO4)(OH)3 are reported. This material can be well described as
a combination of two nonequivalent spin dimers with the sizable magnetic
couplings of J about 700 K and J(D2) about 300 K. Based on density functional
theory calculations, we pinpoint the location of dimers in the crystal
structure. Surprisingly, the largest coupling operates between the structural
Cu2O6 dimers. We investigate magnetostructural correlations in Cu2O6 structural
dimers, by considering the influence of the hydrogen position on the magnetic
coupling. Additionally, we establish the hydrogen positions that were not known
so far and analyze the pattern of hydrogen bonding.


title: The effect of quenched disorder in neutral theories

abstract:
  We study systems with two symmetric absorbing states, such as the voter model
and variations of it, which have been broadly used as minimal neutral models in
genetics, population ecology, sociology, etc. We analyze the effects of a key
ingredient ineluctably present in most real applications: random-field-like
quenched disorder. In accord with simulations and previous findings,
coexistence between the two competing states/opinions turns out to be strongly
favored by disorder in the standard voter model; actually, a disorder-induced
phase transition is generated for any finite system size in the presence of an
arbitrary small spontaneous-inversion rate (preventing absorbing states from
being stable). For non-linear versions of the voter model a general theory (by
AlHammal et al.) explains that the spontaneous breaking of the up/down symmetry
and an absorbing state phase transition can occur either together or
separately, giving raise to two different scenarios. Here, we show that he
presence of quenched disorder in non-linear voter models does not allow the
separation of the up-down (Ising-like) symmetry breaking from the
active-to-absorbing phase transition in low-dimensional systems: both phenomena
can occur only simultaneously, as a consequence of the well-known Imry-Ma
argument generalized to these non-equilibrium problems. When the two phenomena
occur at unison, resulting into a genuinely non-equilibrium ("Generalized
Voter") transition, the Imry-Ma argument is violated and the symmetry can be
spontaneously broken even in low dimensions.


title: Vector Higgs-portal dark matter and Fermi-LAT gamma ray line

abstract:
  We propose a renormalizable model for vector dark matter with extra U(1)
gauge symmetry, which is broken by the VEV of a complex singlet scalar. When
the singlet scalar has a quartic coupling to a heavy charged scalar, the
resonance effect enhances the annihilation cross section of vector dark matter
into two photons such that Fermi-gamma ray line at about 130 GeV is obtained.
In the presence of a tiny mixing between the singlet scalar and the Standard
Model Higgs doublet, the relic density is determined dominantly by WW/ZZ and
two-photon channels near the resonance pole of the singlet scalar. We also show
that various phenomenological bounds coming from the Higgs to diphoton decay
rate, precision data and collider searches for the charged scalar and vacuum
stability are satisfied in the model.


title:
Basic geometric proof of the relation between dimensionality of a
  regular simplex and its dihedral angle

abstract:
  The formula for the dihedral angle of the simplex of n dimensions,
arccos(1/n), is derived using classical geometry.


title: Are we counting or measuring something?

abstract:
  Let $H$ be a semisimple Hopf algebras over an algebraically closed field $k$
of characteristic $0.$ We define Hopf algebraic analogues of commutators and
their generalizations and show how they are related to $H',$ the Hopf algebraic
analogue of the commutator subgroup. We introduce a family of central elements
of $H',$ which on one hand generate $H'$ and on the other hand give rise to a
family of functionals on $H.$ When $H=kG,\,G$ a finite group, these functionals
are counting functions on $G.$ It is not clear yet to what extent they measure
any specific invariant of the Hopf algebra. However, when $H$ is
quasitriangular they are at least characters on $H.$


title:
Toward Evolution Strategies Application in Automatic Polyphonic Music
  Transcription using Electronic Synthesis

abstract:
  We present in this paper a new approach for polyphonic music transcription
using evolution strategies (ES). Automatic music transcription is a complex
process that still remains an open challenge. Using an audio signal to be
transcribed as target for our ES, information needed to generate a MIDI file
can be extracted from this latter one. Many techniques presented in the
literature at present exist and a few of them have applied evolutionary
algorithms to address this problem in the context of considering it as a search
space problem. However, ES have never been applied until now. The experiments
showed that by using these machines learning tools, some shortcomings presented
by other evolutionary algorithms based approaches for transcription can be
solved. They include the computation cost and the time for convergence. As
evolution strategies use self-adapting parameters, we show in this paper that
by correctly tuning the value of its strategy parameter that controls the
standard deviation, a fast convergence can be triggered toward the optima,
which from the results performs the transcription of the music with good
accuracy and in a short time. In the same context, the computation task is
tackled using parallelization techniques thus reducing the computation time and
the transcription time in the overall.


title: Quantum one-cocycles for knots

abstract:
  We give a method to construct non symmetric solutions of a global tetrahedron
equation from solutions of the Yang-Baxter equation. The solution in the
HOMFLYPT case gives rise to the first combinatorial quantum 1-cocycle which
represents a non trivial cohomology class in the topological moduli space of
long knots. We conjecture that the quotient of its values on Hatchers loop and
on the rotation around the long axis is related to the simplicial volume of the
knot complement in the 3-sphere and we prove this for the figure eight knot.
  Surprisingly, the formula for the solution in the HOMFLYPT case of the
positive global tetrahedron equation gives also a solution in the case of the
2-variable Kauffman invariant. But there is also a second solution giving rise
to yet another non trivial quantum 1-cocycle.


title: Second layer of H2 and D2 adsorbed on graphene

abstract:
  We report diffusion Monte Carlo calculations on the phase diagrams of para-H2
and ortho-D2 adsorbed on top of a first layer of the same substances on
graphene. We found that the ground state of the second layer is a triangular
incommensurate solid for both isotopes. The densities for promotion to a second
layer and for the onset of a two-dimensional solid on that second layer compare
favorably to available experimental data in both cases.


title:
Tuning the Electronic and Optical properties of Graphene and
  Boron-Nitride Quantum Dots through Molecular Charge-transfer Interactions

abstract:
  Spin-polarized first-principles calculations have been performed to tune the
electronic and optical properties of graphene (G) and boron-nitride (BN)
quantum dots (QDs) through molecular charge-transfer using
Tetracyanoquinodimethane (TCNQ) and Tetrathiafulvalene (TTF) as dopants. From
our calculations, we find that the nature of interaction between the dopants
and QDs is similar to the interaction between the dopants and their
two-dimensional counter parts of the QDs, namely, graphene and hexagonal
boron-nitride sheets. Based on the values of formation energy and distance
between QDs and dopants, we find that both the dopants are physisorbed on the
QDs. Also, we find that GQDs interact strongly with the dopants compared to the
BNQDS. Interestingly, though the dopants are physisorbed on QDs, their
interaction lead to a decrement in the HOMO-LUMO gap of QDs by more than half
of their original value. We have also observed a spin-polarized HOMO-LUMO gap
in certain QD-dopant complexes. Mulliken population analysis, Density of states
(DOS), projected DOS (pDOS) plots and optical conductivity calculations have
been performed to support and understand the reasons behind the above mentioned
findings.


title: The origin of diffuse scattering in crystalline carbon tetraiodide

abstract:
  Total scattering neutron powder diffraction measurements were performed on
the tetragonal phase (a=6.4202(5) {\AA}, c=9.5762(12) {\AA}) of $CI_4$. The
experiments were followed by Reverse Monte Carlo (for POWder diffraction
(RMCPOW)) modeling. Detailed analyses of the resulting particle configurations
revealed that the observed diffuse scattering originates from the libration of
the molecules. By examining the partial radial distribution functions a
distinct carbon-iodine peak at 4.5 {\AA} is found, which appears as a
consequence of corner-to-face mutual alignment of two molecules. The occurrence
of edge-to-edge alignments is also significant within the first carbon-carbon
coordination shell.


title:
Efficient implementation of Gauss collocation and Hamiltonian Boundary
  Value Methods

abstract:
  In this paper we define an efficient implementation for the family of
low-rank energy-conserving Runge-Kutta methods named Hamiltonian Boundary Value
Methods (HBVMs), recently defined in the last years. The proposed
implementation relies on the particular structure of the Butcher matrix
defining such methods, for which we can derive an efficient splitting
procedure. The very same procedure turns out to be automatically suited for the
efficient implementation of Gauss-Legendre collocation methods, since these
methods are a special instance of HBVMs. The linear convergence analysis of the
splitting procedure exhibits excellent properties, which are confirmed by a few
numerical tests.


title:
Initial-boundary value problems for continuity equations with BV
  coefficients

abstract:
  We establish well-posedness of initial-boundary value problems for continuity
equations with BV (bounded total variation) coefficients. We do not prescribe
any condition on the orientation of the coefficients at the boundary of the
domain. We also discuss some examples showing that, regardless the orientation
of the coefficients at the boundary, uniqueness may be violated as soon as the
BV regularity deteriorates at the boundary.


title: Detecting Radio Emission from Air Showers with LOFAR

abstract:
  LOFAR (the Low Frequency Array) is the largest radio telescope in the world
for observing low frequency radio emission from 10 to 240 MHz. In addition to
its use as an interferometric array, LOFAR is now routinely used to detect
cosmic ray induced air showers by their radio emission. The LOFAR core in the
Netherlands has a higher density of antennas than any dedicated cosmic ray
experiment in radio. On an area of $12 \mathrm{km}^2$ more than 2300 antennas
are installed. They measure the radio emission from air showers with
unprecedented precision and, therefore, give the perfect opportunity to
disentangle the physical processes which cause the radio emission in air
showers. In parallel to ongoing astronomical observations LOFAR is triggered by
an array of particle detectors to record time-series containing cosmic-ray
pulses. Cosmic rays have been measured with LOFAR since June 2011. We present
the results of the first year of data.


title: Damping the zero-point energy of a harmonic oscillator

abstract:
  The physics of quantum electromagnetism in an absorbing medium is that of a
field of damped harmonic oscillators. Yet until recently the damped harmonic
oscillator was not treated with the same kind of formalism used to describe
quantum electrodynamics in a arbitrary medium. Here we use the techniques of
macroscopic QED, based on the Huttner--Barnett reservoir, to describe the
quantum mechanics of a damped oscillator. We calculate the thermal and
zero-point energy of the oscillator for a range of damping values from zero to
infinity. While both the thermal and zero-point energies decrease with damping,
the energy stored in the oscillator at fixed temperature increases with
damping, an effect that may be experimentally observable. As the results follow
from canonical quantization, the uncertainty principle is valid for all damping
levels.


title: Magnetized Branes and the Six-Torus

abstract:
  In the framework of Type IIB String Theory compactified on a general
six-torus T6 with arbitrary complex structure, Yukawa couplings are determined
for the chiral matter described by open strings ending on D9-branes having
different oblique magnetization.


title: $\Sigma$-pure injectivity and Brown representability

abstract:
  We prove that a right $R$-module $M$ is $\Sigma$-pure injective if and only
if $\mathrm{Add}(M)\subseteq \mathrm{Prod}(M)$. Consequently, if $R$ is a
unital ring, the homotopy category $\mathbf{K}({\mathrm{Mod}\text{-} R})$
satisfies the Brown Representability Theorem if and only if the dual category
has the same property. We also apply the main result to provide new
characterizations for right pure-semisimple rings or to give a partial positive
answer to a question of G. Bergman.


title:
Quantum Cryptography Using Various Reversible Quantum Logic Gates in
  WSNs

abstract:
  As sensor nodes are deployed anywhere in a wireless sensor network, hence
their communication can be easily monitored. In these networks, message
protection and node identification are very issues. Hence, security of large
scale such networks requires efficient key distribution and management
mechanisms. Quantum cryptography and particularly quantum key distribution is
such a technique that allocates secure keys only for short distances. While not
completely secure, it offers huge advantages over traditional methods by the
use of entanglement swapping and quantum teleportation. Reversible logic gates
like CNOT, Toffoli, Fredkin etc. are of basic importance in Quantum Computing.
In our research, we adopted a EPR-pair allocation scheme in terms of these
quantum gates to overcome the susceptibility caused by malicious nodes. As the
qubits stored in a sensor node can be used only once and cannot be duplicated,
hence risk of information leakage reduced even if the node are compromised.


title:
Vortex states and Majorana fermions in spin-orbit coupled
  semiconductor-superconductor hybrid structures

abstract:
  We study the energy spectrum of a vortex core in a two-dimensional
semiconductor with Rashba spin-orbit interaction and proximity-coupled to a
conventional superconductor and a ferromagnetic insulator. We perform
self-consistent calculations using the microscopic tight-binding Bogoliubov-de
Gennes method on a lattice and confirm the existence of Majorana fermions in
the non-trivial topological phase. We also find two different topologically
trivial bulk superconducting phases, only differing in the type of vortex core
structure they support and separated by a zero-energy excitation. Furthermore,
we find an asymmetry in the energy spectrum with respect to both Zeeman
splitting and vortex rotation direction and explain its physical origin.


title:
Octahedral Engineering of Orbital Polarizations in Charge Transfer
  Oxides

abstract:
  Negative charge transfer $AB$O$_3$ oxides may undergo electronic
metal--insulator transitions (MIT) concomitant with a dilation and contraction
of nearly rigid octahedra. On both sides of the MIT are in-phase or
out-of-phase (or both) rotations of adjacent octahedra that buckle the
$B$--O--$B$ bond angle away from 180$^\circ$. Using density functional theory
with the PBEsol$+U$ approach, we describe a novel octahedral engineering avenue
to control the $B$ 3d and O $2p$ orbital polarization through enhancement of
the $B$O$_6$ rotation "sense" rather than solely through conventional changes
to the $B$--O bond lengths, \emph{i.e.} crystal field distortions. Using
CaFeO$_3$ as a prototypical material, we show the flavor of the octahedral
rotation pattern when combined with strain--rotation coupling and thin film
engineering strategies offers a promising avenue to fine tune orbital
polarizations near electronic phase boundaries.


title:
Strong connections between quantum encodings, non-locality and quantum
  cryptography

abstract:
  Encoding information in quantum systems can offer surprising advantages but
at the same time there are limitations that arise from the fact that measuring
an observable may disturb the state of the quantum system. In our work, we
provide an in-depth analysis of a simple question: What happens when we perform
two measurements sequentially on the same quantum system? This question touches
upon some fundamental properties of quantum mechanics, namely the uncertainty
principle and the complementarity of quantum measurements. Our results have
interesting consequences, for example they can provide a simple proof of the
optimal quantum strategy in the famous Clauser-Horne-Shimony-Holt game.
Moreover, we show that the way information is encoded in quantum systems can
provide a different perspective in understanding other fundamental aspects of
quantum information, like non-locality and quantum cryptography. We prove some
strong equivalences between these notions and provide a number of applications
in all areas.


title: On Sink Mobility Trajectory in Clustering Routing Protocols in WSNs

abstract:
  Energy efficient routing protocols are consistently cited as efficient
solutions for Wireless Sensor Networks (WSNs) routing. The area of WSNs is one
of the emerging and fast growing fields which brought low cost, low power and
multi-functional sensor nodes. In this paper, we examine some protocols related
to homogeneous and heterogeneous networks. To evaluate the efficiency of
different clustering schemes, we compare five clustering routing protocols; Low
Energy Adaptive Clustering Hierarchy (LEACH), Threshold Sensitive Energy
Efficient Sensor Network (TEEN), Distributed Energy Efficient Clustering (DEEC)
and two variants of TEEN which are Clustering and Multi-Hop Protocol in
Threshold Sensitive Energy Efficient Sensor Network (CAMPTEEN) and Hierarchical
Threshold Sensitive Energy Efficient Sensor Network (H-TEEN). The contribution
of this paper is to introduce sink mobility to increase the network life time
of hierarchal routing protocols. Two scenarios are discussed to compare the
performances of routing protocols; in first scenario static sink is implanted
and in later one mobile sink is used. We perform analytical simulations in
MATLAB by using different performance metrics such as, number of alive nodes,
number of dead nodes and throughput.


title: On the stability of Timoshenko systems with Gurtin-Pipkin thermal law

abstract:
  We analyze a differential system describing a Timoshenko beam coupled with a
temperature evolution of Gurtin-Pipkin type. A necessary and sufficient
condition for exponential stability is established in terms of the structural
parameters of the equations. In particular, we generalize previously known
results on the Fourier-Timoshenko and the Cattaneo-Timoshenko beam models.


title:
The average absorption properties of broad absorption line quasars at
  800 < lambda_rest < 3000 {\AA}, and the underlying physical parameters

abstract:
  Broad absorption line quasars (BALQs) present a large diversity in their
broad absorption line (BAL) profiles. To investigate what physical parameters
underlie this diversity, we construct a sample of BALQs which covers
lambda_rest ~ 800-3000 {\AA}, based on the Sloan Digital Sky Survey DR7 quasar
catalogue. The average BAL properties are evaluated by taking the ratios of
average BALQ spectra to the average spectra of matched samples of non-BALQs,
where the matching is based on various emission properties. We find the
following properties. (i) There is no detectable Lyman edge associated with the
BAL absorbing gas (tau<0.1). (ii) The known increase of average absorption
depth with the ionization potential extends to the higher ionization N V and O
VI BALs. We also find that the C IV BAL profile is controlled by two
parameters. (i) The He II emission EW, which controls the typical velocity of
the C IV BAL, but does not affect the absorption depth. (ii) The spectral slope
in the 1700-3000 {\AA} range (alpha_UVl), which controls the C IV peak
absorption depth, but does not affect the typical velocity. The He II EW and
alpha_UVl also control the observed fraction of quasars that are BALQs. We
suggest that a lower He II EW may indicate a weaker ionizing continuum, which
allows the outflow to reach higher velocities before being overionized,
possibly without a need to invoke a shielding gas. A redder continuum may
indicate a more inclined system, and a larger covering factor and larger column
of the outflow along the line of sight.


title:
Computing the phase diagram of binary mixtures: a patchy particle case
  study

abstract:
  We investigate the phase behaviour of 2D mixtures of bi-functional and
three-functional patchy particles and 3D mixtures of bi-functional and
tetra-functional patchy particles by means of Monte Carlo simulations and
Wertheim theory. We start by computing the critical points of the pure systems
and then we investigate how the critical parameters change upon lowering the
temperature. We extend the Successive Umbrella Sampling method to mixtures to
make it possible to extract information about the phase behaviour of the system
at a fixed temperature for the whole range of densities and compositions of
interest.


title: Average Case and Distributional Analysis of Dual-Pivot Quicksort

abstract:
  In 2009, Oracle replaced the long-serving sorting algorithm in its Java 7
runtime library by a new dual-pivot Quicksort variant due to Vladimir
Yaroslavskiy. The decision was based on the strikingly good performance of
Yaroslavskiy's implementation in running time experiments. At that time, no
precise investigations of the algorithm were available to explain its superior
performance - on the contrary: Previous theoretical studies of other dual-pivot
Quicksort variants even discouraged the use of two pivots. Only in 2012, two of
the authors gave an average case analysis of a simplified version of
Yaroslavskiy's algorithm, proving that savings in the number of comparisons are
possible. However, Yaroslavskiy's algorithm needs more swaps, which renders the
analysis inconclusive.
  To force the issue, we herein extend our analysis to the fully detailed style
of Knuth: We determine the exact number of executed Java Bytecode instructions.
Surprisingly, Yaroslavskiy's algorithm needs sightly more Bytecode instructions
than a simple implementation of classic Quicksort - contradicting observed
running times. Like in Oracle's library implementation we incorporate the use
of Insertionsort on small subproblems and show that it indeed speeds up
Yaroslavskiy's Quicksort in terms of Bytecodes; but even with optimal
Insertionsort thresholds the new Quicksort variant needs slightly more Bytecode
instructions on average.
  Finally, we show that the (suitably normalized) costs of Yaroslavskiy's
algorithm converge to a random variable whose distribution is characterized by
a fixed-point equation. From that, we compute variances of costs and show that
for large n, costs are concentrated around their mean.


title:
Constraints on axion-like particles from X-ray observations of Hydra
  galaxy cluster

abstract:
  Axion-like particles (ALPs) belong to a class of new pseudoscalar particles
that generically couple to photons, opening the possibility of oscillations
from photons into ALPs in an external magnetic field. Having witnessed the
turbulence of their magnetic fields, these oscillations are expected to imprint
irregularities in a limited energy range of the spectrum of astrophysical
sources. In this study, Chandra observations of the Hydra galaxy cluster are
used to constrain the value of the coupling of ALPs to photons. We consider the
conversion of X-ray photons from the central source Hydra A in the magnetic
field of the cluster. The magnetic field strength and structure are well
determined observationally, which adds to the robustness of the analysis. The
absence of anomalous irregularities in the X-ray spectrum of Hydra A
conservatively provides the most competitive constraints on the coupling
constant for ALP masses below 7e-12 eV at the level of g < 8.3e-12 GeV-1 at the
95% confidence level. Because of the specific phenomenology involved, these
constraints actually hold more generally for very light pseudo-Nambu-Goldstone
bosons.


title: Wave function of classical particle in linear potential

abstract:
  The problem of classical particle in linear potential is studied by using the
formalism of Hilbert space and tomographic probability distribution. The
Liouville equation for this problem is solved by finding the density matrix
satisfying von Newmann-like equation in the form of product of wave functions.
The relation to quantum mechanics is discussed.


title: On the size of attractors in $\mathbb{CP}^k$

abstract:
  Let $f$ be a holomorphic endomorphism of $\mathbb{CP}^k$ having an attracting
set $A$. In this paper, we address the question of the "size" of $A$ in a
pluripolar sense. We introduce a conceptually simple framework to have
non-algebraic attracting sets. We prove that adding a dimensional condition,
these sets support a closed positive current with bounded quasi-potential
(which answers a question from T.C. Dinh). Therefore, they are not pluripolar.
Moreover, the examples are abundant on $\mathbb{CP}^k$.


title:
Prioritizing Consumers in Smart Grid: Energy Management Using Game
  Theory

abstract:
  This paper explores an idea of demand-supply balance for smart grids in which
consumers are expected to play a significant role. The main objective is to
motivate the consumer, by maximizing their benefit both as a seller and a
buyer, to trade their surplus energy with the grid so as to balance the demand
at the peak hour. To that end, a Stackelberg game is proposed to capture the
interactions between the grid and consumers, and it is shown analytically that
optimal energy trading parameters that maximize customers utilities are
obtained at the solution of the game. A novel distributed algorithm is proposed
to reach the optimal solution of the game, and numerical examples are used to
assess the properties and effectiveness of the proposed approach.


title:
Interior Structure of Water Planets: Implications for their dynamo
  source regions

abstract:
  Recent discoveries of water-rich, sub-Neptunian to Neptunian-massed
exoplanets with short-period orbits present a new parameter space for the study
of exoplanetary dynamos. We explore the geometry of the dynamo source region
within this parameter space using 1-D interior structure models. We model
planets with 4 chemically distinct layers that consist of (1) an iron core, (2)
a silicate layer, (3) an H2O layer, and (4) an H/He envelope. By varying the
total planetary mass in the range of 1 - 19 Earth masses, the mass fraction of
the H/He envelope between 0.1 - 5.1%, and the equilibrium temperature between
100 - 1000 K, a survey of the parameter space for potential dynamo source
region geometries is conducted. We find that due to the nature of the phase
diagram of water at pressure and temperature conditions of planetary interiors,
two different dynamo source region geometries are obtainable. Specifically, we
find that smaller planets and planets with thicker H/He envelopes are likely to
be in the regime of a thick-shelled dynamo. Massive planets and planets with
thin H/He envelopes are likely to be in the regime of a thin-shelled dynamo.
Also, small variations of these parameters can produce large interior structure
differences. This implies the potential to constrain these parameters based on
observations of a planet's magnetic field signature.


title: Cyclicity in weighted Bergman type spaces

abstract:
  We use the so called resolvent transform method to study the cyclicity of the
one point mass singular inner function in weighted Bergman type spaces.


title:
Computational study of subcritical response in flow past a circular
  cylinder

abstract:
  Flow past a circular cylinder is investigated in the subcritical regime,
below the onset of Benard-von Karman vortex shedding at Re_c ~ 47. The
transient response of infinitesimal perturbations is computed. The domain
requirements for obtaining converged results is discussed at length. It is
shown that energy amplification occurs as low as Re=2.2. Throughout much of the
subcritical regime the maximum energy amplification increases approximately
exponentially in the square of Re reaching 6800 at Re_c$. The spatiotemporal
structure of the optimal transient dynamics is shown to be transitory
Benard-von Karman vortex streets. At Re ~ 42 the long-time structure switches
from exponentially increasing downstream to exponentially decaying downstream.
Three-dimensional computations show that two-dimensional structures dominate
the energy growth except at short times.


title: The initial value problem for the binormal flow with rough data

abstract:
  In this article we consider the initial value problem of the binormal flow
with initial data given by curves that are regular except at one point where
they have a corner. We prove that under suitable conditions on the initial data
a unique regular solution exists for strictly positive and strictly negative
times. Moreover, this solution satisfies a weak version of the equation for all
times and can be seen as a perturbation of a suitably chosen self-similar
solution. Conversely, we also prove that if at time t = 1 a small regular
perturbation of a self-similar solution is taken as initial condition then
there exists a unique solution that at time t = 0 is regular except at a point
where it has a corner with the same angle as the one of the self-similar
solution. This solution can be extended for negative times. The proof uses the
full strength of the previous papers [9], [2], [3] and [4] on the study of
small perturbations of self-similar solutions. A compactness argument is used
to avoid the weighted conditions we needed in [4], as well as a more refined
analysis of the asymptotic in time and in space of the tangent and normal
vectors.


title: Continuous Data Assimilation Using General Interpolant Observables

abstract:
  We present a new continuous data assimilation algorithm based on ideas that
have been developed for designing finite-dimensional feedback controls for
dissipative dynamical systems, in particular, in the context of the
incompressible two-dimensional Navier--Stokes equations. These ideas are
motivated by the fact that dissipative dynamical systems possess finite numbers
of determining parameters (degrees of freedom) such as modes, nodes and local
spatial averages which govern their long-term behavior. Therefore, our
algorithm allows the use of any type of measurement data for which a general
type of approximation interpolation operator exists. Our main result provides
conditions, on the finite-dimensional spatial resolution of the collected data,
sufficient to guarantee that the approximating solution, obtained by our
algorithm from the measurement data, converges to the unknown reference
solution over time. Our algorithm is also applicable in the context of signal
synchronization in which one can recover, asymptotically in time, the solution
(signal) of the underlying dissipative system that is corresponding to a
continuously transmitted partial data.

categories: math.AP nlin.CD physics.ao-ph physics.flu-dyn