title: Combination and QCD Analysis of the HERA Inclusive Cross Sections

abstract:
  A QCD fit analysis to the combined HERA-I inclusive deep inelastic cross
sections measured by the H1 and ZEUS collaborations for $e^\pm p$ scattering
resulting into a competitive NLO PDF set, HERAPDF1.0 is presented. HERAPDF at
NNLO fits are presented as well, resulting, however, in a worse description of
the combined HERA data. In addition, a preliminary analysis including the HERA
II measurements of lower proton-beam energies is performed. The effect of
including the new data on the determination of HERA parton distribution
functions is analysed, using fits similar to those performed for HERAPDF1.0.
Some tension of the QCD fit with respect to the data is identified in the
kinematic region of low $Q^2$ and low x. Finally, the QCD fit analysis of the
combined HERA-I inclusive deep inelastic cross sections has been extended to
include combined HERA II measurements at high $Q^2$. The effect of including
these data on the determination of parton distribution functions is analysed,
resulting into HERAPDF1.5. The precision of the new PDFs at high-x is
considerably improved, particularly in the valence sector.


title: A New 3D Geometric Approach to Focus and Context Lens Effect Simulation

abstract:
  We present a novel methodology based on geometric approach to simulate
magnification lens effects. Our aim is to promote new applications of powerful
geometric modeling techniques in visual computing. Conventional image
processing/visualization methods are computed in two dimensional space (2D). We
examine this conventional 2D manipulation from a completely innovative
perspective of 3D geometric processing. Compared with conventional optical lens
design, 3D geometric method are much more capable of preserving shape features
and minimizing distortion. We magnify an area of interest to better visualize
the interior details, while keeping the rest of area without perceivable
distortion. We flatten the mesh back into 2D space for viewing, and further
applications in the screen space. In both steps, we devise an iterative
deformation scheme to minimize distortion around both focus and context region,
while avoiding the noncontinuous transition region between the focus and
context areas. Particularly, our method allows the user to flexibly modify the
ROI shapes to accommodate complex feature. The user can also easily specify a
spectrum of metrics for different visual effects. Various experimental results
demonstrate the effectiveness, robustness, and efficiency of our framework.


title:
Calculation reduction method for color computer-generated hologram using
  color space conversion

abstract:
  We report a calculation reduction method for color computer-generated
holograms (CGHs) using color space conversion. Color CGHs are generally
calculated on RGB space. In this paper, we calculate color CGHs in other color
spaces: for example, YCbCr color space. In YCbCr color space, a RGB image is
converted to the luminance component (Y), blue-difference chroma (Cb) and
red-difference chroma (Cr) components. In terms of the human eye, although the
negligible difference of the luminance component is well-recognized, the
difference of the other components is not. In this method, the luminance
component is normal sampled and the chroma components are down-sampled. The
down-sampling allows us to accelerate the calculation of the color CGHs. We
compute diffraction calculations from the components, and then we convert the
diffracted results in YCbCr color space to RGB color space.


title:
Point determining digraphs, $\{0,1\}$-matrix partitions, and dualities
  in full homomorphisms

abstract:
  We prove that every point-determining digraph $D$ contains a vertex $v$ such
that $D-v$ is also point determining. We apply this result to show that for any
$\{0,1\}$-matrix $M$, with $k$ diagonal zeros and $\ell$ diagonal ones, the
size of a minimal $M$-obstruction is at most $(k+1)(\ell+1)$. This extends the
results of Sumner, and of Feder and Hell, from undirected graphs and symmetric
matrices to digraphs and general matrices.


title:
The Northern High Time Resolution Universe Pulsar Survey I: Setup and
  initial discoveries

abstract:
  We report on the setup and initial discoveries of the Northern High Time
Resolution Universe survey for pulsars and fast transients, the first major
pulsar survey conducted with the 100-m Effelsberg radio telescope and the first
in 20 years to observe the whole northern sky at high radio frequencies. Using
a newly developed 7-beam receiver system combined with a state-of-the-art
polyphase filterbank, we record an effective bandwidth of 240 MHz in 410
channels centred on 1.36 GHz with a time resolution of 54 $\mu$s. Such fine
time and frequency resolution increases our sensitivity to millisecond pulsars
and fast transients, especially deep inside the Galaxy, where previous surveys
have been limited due to intra-channel dispersive smearing. To optimise
observing time, the survey is split into three integration regimes dependent on
Galactic latitude, with 1500-s, 180-s and 90-s integrations for latitude ranges
$|b|<3.5^{\circ}$, $|b|<15^{\circ}$ and $|b|>15^{\circ}$, respectively. The
survey has so far resulted in the discovery of 15 radio pulsars, including a
pulsar with a characteristic age of $\sim18$ kyr, {PSR J2004+3429}, and a
highly eccentric, binary millisecond pulsar, {PSR J1946+3417}. All newly
discovered pulsars are timed using the 76-m Lovell radio telescope at the
Jodrell Bank Observatory and the Effelsberg radio telescope. We present timing
solutions for all newly discovered pulsars and discuss potential supernova
remnant associations for {PSR J2004+3429}.


title: Example of a Non-standard Extreme Value Law

abstract:
  It has been shown that sufficiently well mixing dynamical systems with
positive entropy have extreme value laws which in the limit converge to one of
the three standard distributions known for i.i.d. processes, namely Gumbel,
Fr\'echet and Weibull distributions. In this short note we give an example
which has a non-standard limiting distribution for its extreme values.
Rotations of the circle by irrational numbers are used and it will be shown
that the limiting distribution is a step function where the limit has to be
taken along a suitable sequence given by the convergents.


title: The pattern and distribution of deleterious mutations in maize

abstract:
  Most non-synonymous mutations are thought to be deleterious because of their
effect on protein sequence. These polymorphisms are expected to be removed or
kept at low frequency by the action of natural selection, and rare deleterious
variants have been implicated as a possible explanation for the "missing
heritability" seen in many studies of complex traits. Nonetheless, the effect
of positive selection on linked sites or drift in small or inbred populations
may also impact the evolution of deleterious alleles. Here, we made use of
genome-wide genotyping data to characterize deleterious variants in a large
panel of maize inbred lines. We show that, in spite of small effective
population sizes and inbreeding, most putatively deleterious SNPs are indeed at
low frequencies within individual genetic groups. We find that genes showing
associations with a number of complex traits are enriched for deleterious
variants. Together these data are consistent with the dominance model of
heterosis, in which complementation of numerous low frequency, weak deleterious
variants contribute to hybrid vigor.


title: Distinctive 21 cm structures of the first stars, galaxies, and quasars

abstract:
  Observations of the redshifted 21 cm line with upcoming radio telescopes
promise to transform our understanding of the cosmic reionization. To unravel
the underlying physical process, we investigate the 21 cm structures of three
different ionizing sources, Population (Pop) III stars, the first galaxies, and
the first quasars, by using radiative transfer simulations that include both
ionization of neutral hydrogen and resonant scattering of Lya photons. We find
that Pop III stars and quasars produce a smooth transition from an ionized and
hot state to a neutral and cold one, owing to their hard spectral energy
distribution with abundant ionizing photons, in contrast to the sharp
transition in galaxies. Furthermore, Lya scattering plays a dominant role in
producing the 21 cm signal as it determines the relation between hydrogen spin
temperature and gas kinetic temperature. This effect, also called
Wouthuysen-Field coupling, depends strongly on the ionizing source. It is the
strongest around galaxies, where the spin temperature is highly coupled to that
of the gas, resulting in extended absorption troughs in the 21 cm brightness
temperature. On the other hand, in the case of Pop III stars, the 21 cm signal
shows both emission and absorption regions around a small HII bubble. For
quasars, a large emission region in the 21 cm signal is produced, and the
absorption region decreases as the size of the HII bubble becomes large due to
the limited traveling time of photons. We predict that future surveys from
large radio arrays such as MWA, LOFAR and SKA may be able to detect the 21 cm
signals of primordial galaxies and quasars, but not likely Pop III stars due to
its small angular diameter.


title:
Acoustic confinement and Stimulated Brillouin Scattering in integrated
  optical waveguides

abstract:
  We examine the effect of acoustic mode confinement on Stimulated Brillouin
Scattering in optical waveguides that consist of a guiding core embedded in a
solid substrate. We find that SBS can arise due to coupling to acoustic modes
in three different regimes. First, the acoustic modes may be guided by total
internal reflection; in this case the SBS gain depends directly on the degree
of confinement of the acoustic mode in the core, which is in turn determined by
the acoustic V-parameter. Second, the acoustic modes may be leaky, but may
nevertheless have a sufficiently long lifetime to have a large effect on the
SBS gain; the lifetime of acoustic modes in this regime depends not only on the
contrast in acoustic properties between the core and the cladding, but is also
highly dependent on the waveguide dimensions. Finally SBS may occur due to
coupling to free modes, which exist even in the absence of acoustic
confinement; we find that the cumulative effect of coupling to these
non-confined modes results in significant SBS gain. We show how the different
acoustic properties of core and cladding lead to these different regimes, and
discuss the feasibility of SBS experiments using different material systems.


title:
Beam dynamics studies of the photo-injector in low-charge operation mode
  for the ERL test facility at IHEP

abstract:
  The energy recovery linac test facility (ERL-TF), a compact ERL-FEL (free
electron laser) two-purpose machine, was proposed at the Institute of High
Energy Physics, Beijing. As one important component of the ERL-TF, the
photo-injector started with a photocathode direct-current gun has been
designed. In this paper optimization of the injector beam dynamics in
low-charge operation mode is performed with iterative scans using Impact-T. In
addition, the dependencies between the optimized beam quality and the initial
offset at cathode and element parameters are investigated. The tolerance of
alignment and rotation errors is also analyzed.


title: L1-Optimal Splines for Outlier Rejection

abstract:
  In this article, we consider control theoretic splines with L1 optimization
for rejecting outliers in data. Control theoretic splines are either
interpolating or smoothing splines, depending on a cost function with a
constraint defined by linear differential equations. Control theoretic splines
are effective for Gaussian noise in data since the estimation is based on L2
optimization. However, in practice, there may be outliers in data, which may
occur with vanishingly small probability under the Gaussian assumption of
noise, to which L2-optimized spline regression may be very sensitive. To
achieve robustness against outliers, we propose to use L1 optimality, which is
also used in support vector regression. A numerical example shows the
effectiveness of the proposed method.


title:
Optimal Discretization of Analog Filters via Sampled-Data H-infinity
  Control Theory

abstract:
  In this article, we propose optimal discretization of analog filters (or
controllers) based on the theory of sampled-data H-infinity control. We
formulate the discretization problem as minimization of the H-infinity norm of
the error system between a (delayed) target analog filter and a digital system
including an ideal sampler, a zero-order hold, and a digital filter. The
problem is reduced to discrete-time H-infinity optimization via the fast
sample/hold approximation method. We also extend the proposed method to
multirate systems. Feedback controller discretization by the proposed method is
discussed with respect to stability. Numerical examples show the effectiveness
of the proposed method.


title:
An Algorithm on Multivariate Interpolation for Cartesian Grid Complex
  Boundary Problems

abstract:
  We present a simple algorithm to select multivariate interpolation stencil
with a Cartesian grid. We show its applicability by using this algorithm in the
embedded boundary method for solving the elliptic interface problem.


title:
3D Volume Calculation For the Marching Cubes Algorithm in Cartesian
  Coordinates

abstract:
  From a scalar field defined at the corner of a cube, an isosurface can be
extracted using the Marching Cube algorithm. The isosurface separates the cell
into two or more partial cells. A similar situation arises when an material
interface in the Front Tracking method cuts through the computational cells. A
popular method to calculate the volumes of the partial cells is to first
partition the cells into tetrahedra and then sum together the volumes of the
tetrahedra for the corresponding partial cells. In this paper, the divergence
theorem is used to calculate the volumes of the partial cells generated by the
Marching Cubes algorithm. This method is both more robust and efficient
compared with the tetrahedralization approach.


title: Blind-date Conversation Joining

abstract:
  We focus on a form of joining conversations among multiple parties in
service-oriented applications where a client may asynchronously join an
existing conversation without need to know in advance any information about it.
More specifically, we show how the correlation mechanism provided by
orchestration languages enables a form of conversation joining that is
completely transparent to clients and that we call 'blind-date joining'. We
provide an implementation of this strategy by using the standard orchestration
language WS-BPEL. We then present its formal semantics by resorting to COWS, a
process calculus specifically designed for modelling service-oriented
applications. We illustrate our approach by means of a simple, but realistic,
case study from the online games domain.


title: Local Type Checking for Linked Data Consumers

abstract:
  The Web of Linked Data is the cumulation of over a decade of work by the Web
standards community in their effort to make data more Web-like. We provide an
introduction to the Web of Linked Data from the perspective of a Web developer
that would like to build an application using Linked Data. We identify a
weakness in the development stack as being a lack of domain specific scripting
languages for designing background processes that consume Linked Data. To
address this weakness, we design a scripting language with a simple but
appropriate type system. In our proposed architecture some data is consumed
from sources outside of the control of the system and some data is held
locally. Stronger type assumptions can be made about the local data than
external data, hence our type system mixes static and dynamic typing.
Throughout, we relate our work to the W3C recommendations that drive Linked
Data, so our syntax is accessible to Web developers.


title: Amending Choreographies

abstract:
  Choreographies are global descriptions of system behaviors, from which the
local behavior of each endpoint entity can be obtained automatically through
projection. To guarantee that its projection is correct, i.e. it has the same
behaviors of the original choreography, a choreography usually has to respect
some coherency conditions. This restricts the set of choreographies that can be
projected.
  In this paper, we present a transformation for amending choreographies that
do not respect common syntactic conditions for projection correctness.
Specifically, our transformation automatically reduces the amount of
concurrency, and it infers and adds hidden communications that make the
resulting choreography respect the desired conditions, while preserving its
behavior.


title: Proving Properties of Rich Internet Applications

abstract:
  We introduce application layer specifications, which allow us to reason about
the state and transactions of rich Internet applications. We define variants of
the state/event based logic UCTL* along with two example applications to
demonstrate this approach, and then look at a distributed, rich Internet
application, proving properties about the information it stores and
disseminates. Our approach enables us to justify proofs about abstract
properties that are preserved in the face of concurrent, networked inputs by
proofs about concrete properties in an Internet setting. We conclude that our
approach makes it possible to reason about the programs and protocols that
comprise the Internet's application layer with reliability and generality.


title: Cluster states and monopole transitions in $^{16}$O

abstract:
  Cluster structures and monopole transitions in positive parity states of
$^{16}$O were investigated based on the generator coordinate method calculation
of an extended $^{12}$C+$\alpha$ cluster model. The ground and excited states
of a $^{12}$C cluster are taken into account by using $^{12}$C wave functions
obtained with the method of antisymmetrized molecular dynamics. The $0^+_2$
state of $^{16}$O and its rotational members, the $2^+_1$ and $4^+_1$ states
are described well by the cluster states dominated by the
$^{12}$C($0^+_1$)+$\alpha$ structure. Above the $^{12}$C($0^+_2$)+$\alpha$
threshold energy, we obtained a $0^+$ state having the
$^{12}$C($0^+_2$)+$\alpha$ cluster structure, which is considered to be a
candidate for the $4\alpha$ cluster gas state. The band structures were
discussed based on the calculated $E2$ transition strength. Isoscalar Monopole
excitations from the ground state were also discussed.


title:
Effect of the choice of stagnation density in data-fitted first- and
  second-order traffic models

abstract:
  For a class of data-fitted macroscopic traffic models, the influence of the
choice of the stagnation density on the model accuracy is investigated. This
work builds on an established framework of data-fitted first-order
Lighthill-Whitham-Richards (LWR) models and their second-order Aw-Rascle-Zhang
(ARZ) generalizations. These models are systematically fitted to historic
fundamental diagram data, and then their predictive accuracy is quantified via
a version of the three-detector problem test, considering vehicle trajectory
data and single-loop sensor data. The key outcome of this study is that with
commonly suggested stagnation densities of 120 vehicles/km/lane and above,
information travels backwards too slowly. It is then demonstrated that the
reduction of the stagnation density to 90-100 vehicles/km/lane addresses this
problem and results in a significant improvement of the predictive accuracy of
the considered models.


title: The Schwarzschild metric: It's the coordinates, stupid!

abstract:
  Every general relativity textbook emphasizes that coordinates have no
physical meaning. Nevertheless, a coordinate choice must be made in order to
carry out real calculations, and that choice can make the difference between a
calculation that is simple and one that is a mess. We give a concrete
illustration of the maxim that "coordinates matter" using the exact
Schwarzschild solution for a vacuum, static, spherical spacetime. We review the
standard textbook derivation, Schwarzschild's original 1916 derivation, and a
derivation using the Landau-Lifshitz formulation of the Einstein field
equations. The last derivation is much more complicated, has one aspect for
which we have been unable to find a solution, and gives an explicit
illustration of the fact that the Schwarzschild geometry can be described in
infinitely many coordinate systems.


title: Most hyperelliptic curves over Q have no rational points

abstract:
  By a hyperelliptic curve over Q, we mean a smooth, geometrically irreducible,
complete curve C over Q equipped with a fixed map of degree 2 to P^1 defined
over Q. Thus any hyperelliptic curve C over Q of genus g can be embedded in
weighted projective space P(1,1,g+1) via an equation of the form
  C : z^2 = f(x,y) = f_0 x^n + f_1 x^{n-1} y + ... + f_n y^n where n=2g+2, the
coefficients f_i lie in Z, and f factors into distinct linear factors over
Q-bar. Define the height H(C) of C by H(C):=max{|f_i|}, and order all
hyperelliptic curves over Q of genus g by height. Then we prove that, as g
tends to infinity:
  1) a density approaching 100% of hyperelliptic curves of genus g have no
rational points;
  2) a density approaching 100% of those hyperelliptic curves of genus g that
have points everywhere locally fail the Hasse principle; and
  3) a density approaching 100% of hyperelliptic curves of genus g have empty
Brauer set, i.e., have a Brauer-Manin obstruction to having a rational point.
  We also prove positive proportion results of this type for individual genera,
including g = 1.


title:
Probing the dynamic interference in molecular high-order harmonic
  generation through Bohmian trajectories

abstract:
  By using Bohmian trajectory method, we investigate the dynamic interference
in diatomic molecular high-order harmonic generation progress. It is
demonstrated that the main characteristics of the molecular harmonic spectrum
can be well reproduced by only two Bohmain trajectories which are located
respectively at the two ions. This is because these two localized trajectories
can receive and store the whole collision information coming from all of the
other recollision trajectories. Therefore, the amplitudes and frequencies of
these two trajectories represent the intensity and frequency distribution of
the harmonic generation. Moreover, the interference between these two
trajectories shows a dip in the harmonic spectrum, which indicates the
molecular structure information. ?


title:
Numerical study of magnetic and pairing correlation in bilayer
  triangular lattice

abstract:
  By using the determinant Quantum Monte Carlo method, the magnetic and pairing
correlation of the Na$_{x}$CoO$_{2}\cdot$yH$_{2}$O system are studied within
the Hubbard model on a bilayer triangular lattice. The temperature dependence
of spin correlation function and pairing susceptibility with several kinds of
symmetries at different electron fillings and inter layer coupling terms are
investigated. It is found that the system shows an antiferromagnetic
correlation around the half filling, and the $fn$-wave pairing correlation
dominates over other kinds of pairing symmetry in the low doping region. As the
electron filling decreases away from the half filling, both the ferromagnetic
correlation and the $f$-wave paring susceptibility are enhanced and tend to
dominate. It is also shown that both the magnetic susceptibility and paring
susceptibility decrease as the inter layer coupling increases.


title: Sporadic neighbour-transitive codes in Johnson graphs

abstract:
  We classify the neighbour-transitive codes in Johnson graphs J(v, k) of
minimum distance at least three which admit a neighbour-transitive group of
automorphisms that is an almost simple two-transitive group of degree v and
does not occur in an infinite family of two-transitive groups. The result of
this classification is a table of 22 codes with these properties. Many have
relatively large minimum distance in comparison to their length v and number of
code words. We construct an additional five neighbour-transitive codes with
minimum distance two admitting such a group. All 27 codes are t-designs with t
at least two.


title: Spatial Process Generation

abstract:
  The generation of random spatial data on a computer is an important tool for
understanding the behavior of spatial processes. In this paper we describe how
to generate realizations from the main types of spatial processes, including
Gaussian and Markov random fields, point processes, spatial Wiener processes,
and Levy fields. Concrete MATLAB code is provided.


title: Cognitive Random Stepped Frequency Radar with Sparse Recovery

abstract:
  Random stepped frequency (RSF) radar, which transmits random-frequency
pulses, can suppress the range ambiguity, improve convert detection, and
possess excellent electronic counter-countermeasures (ECCM) ability [1]. In
this paper, we apply a sparse recovery method to estimate the range and Doppler
of targets. We also propose a cognitive mechanism for RSF radar to further
enhance the performance of the sparse recovery method. The carrier frequencies
of transmitted pulses are adaptively designed in response to the observed
circumstance. We investigate the criterion to design carrier frequencies, and
efficient methods are then devised. Simulation results demonstrate that the
adaptive frequency-design mechanism significantly improves the performance of
target reconstruction in comparison with the non-adaptive mechanism.


title: Locally s-distance transitive graphs and pairwise transitive designs

abstract:
  The study of locally s-distance transitive graphs initiated by the authors in
previous work, identified that graphs with a star quotient are of particular
interest. This paper shows that the study of locally s-distance transitive
graphs with a star quotient is equivalent to the study of a particular family
of designs with strong symmetry properties that we call nicely affine and
pairwise transitive. We show that a group acting regularly on the points of
such a design must be abelian and give a general construction for this case.


title:
A Critical String Theory in (3+1)+4 Dimensions for the Standard Model
  with Three Generations of Fermions and Ultra-Heavy Sterile Right-Handed
  Neutrinos

abstract:
  Redefining the vacuum state of a free two-fold $N=1$ covariant supersymmetric
string action as the one with all the excited states of world-sheet fermions
occupied, makes the theory anomaly free in (3+1)+4 dimensions. While in the
$NS$ sector the spectrum resembles the same for the standard $N=1$ superstring
theory with one of the $N$ species in the background, in the $R$ sector both
the species of fermions are required to describe the relevant spin operators to
describe the fermion spectra. A crucial difference from the $D=10, N=1$ theory
is that the fermions states are Dirac particles instead of Majorana-Weyl. Even
though the full spectrum of the theory contains both bosons and fermions of
various spin, there is no space-time supersymmetry due to obvious lack of
triality. The four coordinates of the 4 dimensional Euclidean space describes a
$CP^2$ to define the confined gauge symmetry $SU(3)_C$. The bosonization of
their supersymmetric partners yields additional two coordinates to describe a
$S^2$ that defines the $SU(2)_L$ of the Standard Model. There should be three
types of left-handed neutrinos. The right-handed neutrino becomes sterile.
Spinors and gauge bosons derive their masses through coupling to the tachyons
present in the spectrum via SSB and strings become point-particles below the
critical temperature.


title: Superpatterns and Universal Point Sets

abstract:
  An old open problem in graph drawing asks for the size of a universal point
set, a set of points that can be used as vertices for straight-line drawings of
all n-vertex planar graphs. We connect this problem to the theory of
permutation patterns, where another open problem concerns the size of
superpatterns, permutations that contain all patterns of a given size. We
generalize superpatterns to classes of permutations determined by forbidden
patterns, and we construct superpatterns of size n^2/4 + Theta(n) for the
213-avoiding permutations, half the size of known superpatterns for
unconstrained permutations. We use our superpatterns to construct universal
point sets of size n^2/4 - Theta(n), smaller than the previous bound by a 9/16
factor. We prove that every proper subclass of the 213-avoiding permutations
has superpatterns of size O(n log^O(1) n), which we use to prove that the
planar graphs of bounded pathwidth have near-linear universal point sets.


title:
Cotunneling signatures of Spin-Electric coupling in frustrated
  triangular molecular magnets

abstract:
  The ground state of frustrated (antiferromagnetic) triangular molecular
magnets is characterized by two total-spin $S =1/2$ doublets with opposite
chirality. According to a group theory analysis [M. Trif \textit{et al.}, Phys.
Rev. Lett. \textbf{101}, 217201 (2008)] an external electric field can
efficiently couple these two chiral spin states, even when the spin-orbit
interaction (SOI) is absent. The strength of this coupling, $d$, is determined
by an off-diagonal matrix element of the dipole operator, which can be
calculated by \textit{ab-initio} methods [M. F. Islam \textit{et al.}, Phys.
Rev. B \textbf{82}, 155446 (2010)]. In this work we propose that
Coulomb-blockade transport experiments in the cotunneling regime can provide a
direct way to determine the spin-electric coupling strength. Indeed, an
electric field generates a $d$-dependent splitting of the ground state
manifold, which can be detected in the inelastic cotunneling conductance. Our
theoretical analysis is supported by master-equation calculations of quantum
transport in the cotunneling regime. We employ a Hubbard-model approach to
elucidate the relationship between the Hubbard parameters $t$ and $U$, and the
spin-electric coupling constant $d$. This allows us to predict the regime in
which the coupling constant $d$ can be extracted from experiment.


title: The nearby, young, isolated, dusty star HD 166191

abstract:
  We report an in-depth study of the F8-type star HD 166191, identified in an
ongoing survey for stars exhibiting infrared emission above their expected
photospheres in the Wide-field Infrared Survey Explorer all-sky catalog. The
fractional IR luminosity measured from 3.5 to 70 $\mu$m is exceptionally high
(L$_{IR}$/L$_{bol}$ $\sim$10%). Near-diffraction limited imaging observations
with the T-ReCS Si filter set on the Gemini South telescope and adaptive optics
imaging with the NIRC2 Lp filter on the Keck II telescope confirmed that the
excess emission coincides with the star. Si-band images show a strong
solid-state emission feature at $\sim$10 $\mu$m. Theoretical evolutionary
isochrones and optical spectroscopic observations indicate a stellar age in the
range 10-100 Myr. The large dust mass seen in HD 166191's terrestrial planet
zone is indicative of a recent collision between planetary embryos or massive
ongoing collisional grinding associated with planet building.


title:
Properties of Newly Formed Dust Grains in The Luminous Type IIn
  Supernova 2010jl

abstract:
  Supernovae (SNe) have been proposed to be the main production sites of dust
grains in the Universe. Our knowledge on their importance to dust production
is, however, limited by observationally poor constraints on the nature and
amount of dust particles produced by individual SNe. In this paper, we present
a spectrum covering optical through near-Infrared (NIR) light of the luminous
Type IIn supernova (SN IIn) 2010jl around one and half years after the
explosion. This unique data set reveals multiple signatures of newly formed
dust particles. The NIR portion of the spectrum provides a rare example where
thermal emission from newly formed hot dust grains is clearly detected. We
determine the main population of the dust species to be carbon grains at a
temperature of ~1,350 - 1,450K at this epoch. The mass of the dust grains is
derived to be ~(7.5 - 8.5) x 10^{-4} Msun. Hydrogen emission lines show
wavelength-dependent absorption, which provides a good estimate on the typical
size of the newly formed dust grains (~0.1 micron, and most likely <~0.01
micron). We attribute the dust grains to have been formed in a dense cooling
shell as a result of a strong SN-circumstellar media (CSM) interaction. The
dust grains occupy ~10% of the emitting volume, suggesting an inhomogeneous,
clumpy structure. The average CSM density is required to be >~3 x 10^{7}
cm^{-3}, corresponding to a mass loss rate of >~0.02 Msun yr^{-1} (for a mass
loss wind velocity of ~100 km s^{-1}). This strongly supports a scenario that
SN 2010jl and probably other luminous SNe IIn are powered by strong
interactions within very dense CSM, perhaps created by Luminous Blue Variable
(LBV)-like eruptions within the last century before the explosion.


title: Hyperfine effects on potassium tune-out wavelengths and polarizabilities

abstract:
  The influence of hyperfine interactions on the tune-out wavelengths of the
$^{39,40,41}$K isotopes of the potassium atom was investigated. The hyperfine
interaction of the $4s_{1/2}$ state result in a shift and splitting of the
primary tune-out wavelength near 769 nm. The $4s_{1/2}$ ground state hyperfine
splittings of the primary tune-out were almost equal to the hyperfine
splittings of the ground states. The splittings in the wavelengths were 0.0008,
0.0027 and 0.0005 nm for $^{39}$K, $^{40}$K and $^{41}$K respectively. The
hyperfine splitting of the $np_{J}$ levels leads to the creation of additional
tune-out wavelengths. The additional tune-out wavelengths could be difficult to
detect due to very small differences from the transition wavelengths to the
$4p_{J,F}$ states. The hyperfine Stark shift for the ground states of all three
isotopes were also computed and the value for $^{30}$K was found to be
compatible with the previous experiments and the most recent calculation using
relativistic many body perturbation theory.


title: On p-nilpotency of finite groups?

abstract:
  Let $H$ be a subgroup of a group $G$. $H$ is said satisfying $\Pi$-property
in $G$, if $|G/K:N_{G/K}(HK/K\cap L/K)|$ is a
  $\pi(HK/K\cap L/K))$-number for any chief factor $L/K$ of $G$, and, if there
is a subnormal supplement $T$ of $H$ in $G$ such that $H\cap T\le I\le H$ for
some subgroup $I$ satisfying $\Pi$-property in $G$, then $H$ is said
$\Pi$-normal in $G$. By these properties of some subgroups, we obtain some new
criterions of $p$-nilpotency of finite groups.


title: Rationality for subgroups of S_6

abstract:
  For a transitive subgroup $G \le S_6$ which contain $C_3 \times C_3$ as
subgroup, we prove that $K(x_1,\dots,x_6)^G$ is rational over $K$, where $K$ is
any field, and $G$ acts naturally on $K(x_1,\dots,x_6)$ by permutations on the
variables. We also give an application on construction of generic polynomials.


title: High-jet relations of the heat kernel embedding map and applications

abstract:
  For any compact Riemannian manifold $(M,g)$ and its heat kernel embedding map
$psi_t$ from M into $l^2$ constructed in [BBG], we study the higher derivatives
of $psi_t$ with respect to an orthonormal basis at $x$ on $M$. As the heat flow
time $t$ goes to 0, it turns out the limiting angles between these derivative
vectors are universal constants independent on $g$, $x$ and the choice of
orthonormal basis. Geometric applications to the mean curvature and the
Riemannian curvature are given. Some algebraic structures of the infinite jet
space of $psi_t$ are explored.


title: X-ray and Infrared Properties of Be/X-ray Binary Pulsars

abstract:
  During normal Type I outbursts, the pulse profiles of Be/X-ray binary pulsars
are found to be complex in soft X-ray energy ranges. The profiles in soft X-ray
energy ranges are characterized by the presence of narrow absorption dips or
dip-like features at several pulse phases. However, in hard X-ray energy
ranges, the pulse profiles are rather smooth and single-peaked. Pulse
phase-averaged spectroscopy of the these pulsars had been carried out during
Type I outbursts. The broad-band spectrum of these pulsars were well described
by partial covering high energy cutoff power-law model with interstellar
absorption and Iron K_alpha emission line at 6.4 keV. Phase-resolved
spectroscopy revealed that the presence of additional matter at certain pulse
phases that partially obscured the emitted radiation giving rise to dips in the
pulse profiles. The additional absorption is understood to be taking place by
matter in the accretion streams that are phase locked with the neutron star.
Optical/infrared observations of the companion Be star during these Type I
outbursts showed that the increase in the X-ray intensity of the pulsar is
coupled with the decrease in the optical/infrared flux of the companion star.
There are also several changes in the IR/optical emission line profiles during
these X-ray outbursts. The X-ray properties of these pulsars during Type I
outbursts and corresponding changes in optical/infrared wavebands are discussed
in this paper.


title:
Skyrmion ground state and gyration of skyrmions in magnetic nanodisks
  without the Dzyaloshinsky-Moriya interaction

abstract:
  We show by micromagnetic simulations that spontaneous skyrmion ground state
can exist in Co/Ru/Co nanodisks without the Dzyaloshinsky-Moriya interaction
(DMI), which can remain stable in the applied magnetic field along +z direction
even up to 0.44 T. The guiding center ($R_x$,$R_y$) of skyrmion defined by the
moments of the topological density presents a novel gyration with a star-like
trajectory in a pulsed magnetic field and a hexagonal trajectory after the
field is switched off, which is different from that of vortex or bubble. One of
the coupled skyrmions could move without an external magnetic field, but only
induced by the motion of the other one due to strong inter-layer magnetostatic
interactions. This work sheds light on how novel skyrmions can be discovered in
various (not limited to magnetic) systems with competing energies and
contributes to the understanding of the dynamical properties of skyrmion.


title: Resummation with Wilson lines off the light cone

abstract:
  I review the resummation formalism for organizing large logarithms in
perturbative expansion of collinear subprocesses through the variation of
Wilson lines off the light cone. A master equation is derived, which involves
the evolution kernel resulting from this variation. It is then demonstrated
that all the known single- and double-logarithm summations for a parton
distribution function or a transverse-momentum-dependentparton distribution can
be reproduced from the master equation by applying appropriate soft-gluon
approximations to the evolution kernel. Moreover, jet substructures,
information which is crucial for particle identification at the Large Hadron
Collider and usually acquired from event generators, can also be calculated in
this formalism.


title: Theoretical study of ThO for the electron electric dipole moment search

abstract:
  An experiment to search for the electron electric dipole moment (\eEDM) on
the metastable $H^3\Delta_1$ state of ThO molecule was proposed and now in the
final stage of preparation by the ACME collaboration
[http://www.electronedm.org]. To interpret the experiment in terms of \eEDM\
and dimensionless constant $k_{T,P}$ characterizing the strength of the scalar
T,P-odd electron-nucleus neutral current interaction, an accurate theoretical
study of effective electric field on electron, Eeff, and $W_{T,P}$ constants is
required. We report calculation of \Eeff\ (84 GV/cm) and a parameter of T,P-odd
scalar neutral currents interaction, $W_{T,P}$ (116 kHz), together with the
hyperfine structure constant, molecule frame dipole moment and $H^3\Delta_1\to
X^1\Sigma^+$ transition energy, which can serve as a measure of reliability of
the obtained \Eeff\ and $W_{T,P}$ values. Besides, our results include a parity
assignment and evaluation of the electric-field dependence for the magnetic $g$
factors for the $\Omega$-doublets of $H^3\Delta_1$.


title: Hybrid Spin Noise Spectroscopy and the Spin Hall Effect

abstract:
  Here we suggest a novel hybrid spin noise spectroscopy technique, which is
sensitive to the spin Hall effect. It is shown that, while the standard
spin-spin correlation function is not sensitive to the spin Hall effect,
spin-transverse voltage and transverse voltage-voltage correlation functions
provide the missing sensitivity being linear and quadratic in the spin Hall
coefficient, respectively. The correlation between transverse voltage and spin
fluctuations appears as a result of spin-charge coupling fundamental for the
spin Hall effect. We anticipate that the proposed method could find
applications in the studies of spin-charge coupling in semiconductors.


title:
Temperature Dependence of Thermopower in Strongly Correlated
  Multiorbital Systems

abstract:
  Temperature dependence of thermopower in the multiorbital Hubbard model is
studied by using the dynamical mean-field theory with the non-crossing
approximation impurity solver. It is found that the Coulomb interaction, the
Hund coupling, and the crystal filed splitting bring about non-monotonic
temperature dependence of the thermopower, including its sign reversal. The
implication of our theoretical results to some materials is discussed.


title:
A Kiefer-Wolfowitz type of result in a general setting, with an
  application to smooth monotone estimation

abstract:
  We consider Grenander type estimators for monotone functions $f$ in a very
general setting, which includes estimation of monotone regression curves,
monotone densities, and monotone failure rates. These estimators are defined as
the left-hand slope of the least concave majorant $\hat{F}_n$ of a naive
estimator $F_n$ of the integrated curve $F$ corresponding to $f$. We prove that
the supremum distance between $\hat{F}_n$ and $F_n$ is of the order
$O_p(n^{-1}\log n)^{2/(4-\tau)}$, for some $\tau\in[0,4)$ that characterizes
the tail probabilities of an approximating process for $F_n$. In typical
examples, the approximating process is Gaussian and $\tau=1$, in which case the
convergence rate is $n^{-2/3}(\log n)^{2/3}$ is in the same spirit as the one
obtained by Kiefer and Wolfowitz (1976) for the special case of estimating a
decreasing density. We also obtain a similar result for the primitive of $F_n$,
in which case $\tau=2$, leading to a faster rate $n^{-1}\log n$, also found by
Wang and Woodfroofe (2007). As an application in our general setup, we show
that a smoothed Grenander type estimator and its derivative are asymptotically
equivalent to the ordinary kernel estimator and its derivative in first order.


title:
Di-neutron correlation in monopole two-neutron transfer modes in Sn
  isotope chain

abstract:
  We study microscopic structures of monopole pair vibrational modes and
associated two-neutron transfer amplitudes in neutron-rich Sn isotopes by means
of the linear response formalism of the quasiparticle random phase
approximation(QRPA). For this purpose we introduce a method to decompose the
transfer amplitudes with respect to two-quasiparticle components of the QRPA
eigen mode. It is found that pair-addition ibrational modes in neutron-rich
$^{132-140}$Sn and the pair rotational modes in $^{142-150}$Sn are commonly
characterized by coherent contributions of quasaiparticle states having high
orbital angular momenta $l \gesim 5$, which suggests transfer of a spatially
correlated neutron pair. The calculation also predicts a high-lying pair
vibration, the giant pair vibration, emerging near the one-neutron separation
energy in $^{110-130}$Sn, and we find that they have the same di-neutron
characters as that of the low-lying pair vibration in $^{132-140}$Sn.


title: Inverse Procedural Modeling of Facade Layouts

abstract:
  In this paper, we address the following research problem: How can we generate
a meaningful split grammar that explains a given facade layout? To evaluate if
a grammar is meaningful, we propose a cost function based on the description
length and minimize this cost using an approximate dynamic programming
framework. Our evaluation indicates that our framework extracts meaningful
split grammars that are competitive with those of expert users, while some
users and all competing automatic solutions are less successful.


title:
Polyharmonic maps of order k with finite L^p k-energy into Euclidean
  spaces

abstract:
  We consider polyharmonic maps $\phi:(M,g)\rightarrow $\mathbb{E}^n$ of order
k from a complete Riemannian manifold into the Euclidean space and let $p$ be a
real constant satisfying $1<p<\infty$. (i) If, $\int_M|W^{k-1}|^p dv_g<\infty,$
and $\int_M|\bar \nabla W^{k-2}|^2dv_g<\infty.$ Then $\phi$ is a polyharmonic
map of order k-1. (ii) If, $\int_M|W^{k-1}|^p dv_g<\infty,$ and $Vol
(M,g)=\infty.$ Then $\phi$ is a polyharmonic map of order k-1. Here,
$W^s=\bar\Delta^{s-1}\tau(\phi) (s=1,2,...)$ and $W^0=\phi$. As a corollary, we
give an affirmative partial answer to generalized Chen's conjecture.


title: Laser cooling and slowing of CaF molecules

abstract:
  We demonstrate slowing and longitudinal cooling of a supersonic beam of CaF
molecules using counter-propagating laser light resonant with a closed
rotational and almost closed vibrational transition. A group of molecules are
decelerated by about 20 m/s by applying light of a fixed frequency for 1.8 ms.
Their velocity spread is reduced, corresponding to a final temperature of about
300 mK. The velocity is further reduced by chirping the frequency of the light
to keep it in resonance as the molecules slow down.


title: Higgs Boson Production and Decay: Dalitz Sector

abstract:
  The processes involving a Higgs boson, a photon(gluon) and a fermion pair
pose severe challenges to the experimental analysis. They represent rare decays
and production mechanisms of the Higgs boson at LHC. However, they are not
Yukawa suppressed at next-to-leading order opening a window for the correct
definition of pseudo-observables, e.g. a definition of the Higgs decay width
into Z + photon with universal inherent meaning, that are currently used in
extracting information for the couplings of the newly discovered resonance at
LHC. The impact of genuinely electroweak NLO corrections is discussed, as well
as the comparison of the full-fledged cross-sections to their zero-width
approximation.


title: Rational invariants for subgroups of S_5 and S_7

abstract:
  Let $G$ be a subgroup of $S_n$, the symmetric group of degree $n$. For any
field $k$, $G$ acts naturally on the rational function field
$k(x_1,x_2,\ldots,x_n)$ via $k$-automorphisms defined by $\sigma\cdot
x_i=x_{\sigma(i)}$ for any $\sigma\in G$, any $1\le i\le n$. Theorem. If $n\le
5$, then the fixed field $k(x_1,\ldots,x_n)^G$ is purely transcendental over
$k$. We will show that $\bm{C}(x_1,\ldots,x_7)^G$ is also purely transcendental
over $\bm{C}$ if $G$ is any transitive subgroups of $S_7$ other than $A_7$; a
similar result is valid for solvable transitive subgroups of $S_{11}$.


title:
Spin-isospin response of deformed neutron-rich nuclei in a
  self-consistent Skyrme energy-density-functional approach

abstract:
  We develop a new framework of the self-consistent deformed proton-neutron
quasiparticle-random-phase approximation (pnQRPA), formulated in the
Hartree-Fock-Bogoliubov (HFB) single-quasiparticle basis. The same Skyrme force
is used in both the HFB and pnQRPA calculations except in the proton-neutron
particle-particle channel, where an S=1 contact force is employed. Numerical
application is performed for Gamow-Teller (GT) strength distributions and
$\beta$-decay rates in the deformed neutron-rich Zr isotopes located around the
path of the rapid-neutron-capture process nucleosynthesis. It is found that the
GT strength distributions are fragmented due to deformation. Furthermore we
find that the momentum-dependent terms in the particle-hole residual
interaction leads to a stronger collectivity of the GT giant resonance. The T=0
pairing enhances the low-lying strengths cooperatively with the T=1 pairing
correlation, which shortens the $\beta$-decay half lives by at most an order of
magnitude. The new calculation scheme reproduces well the observed isotopic
dependence of the $\beta$-decay half lives of deformed $^{100-110}$Zr isotopes.


title:
A perturbation result for the $Q_{\ gamma}$ curvature problem on
  $\mathbb{S}^n$

abstract:
  We consider the problem of prescribing the $Q_{\ gamma}$ curvature on
$\mathbb{S}^n$. Using a perturbation method, we obtain existence results for
curvatures close to a positive constant.


title: A solvable model for solitons pinned to a PT-symmetric dipole

abstract:
  We introduce the simplest one-dimensional nonlinear model with the
parity-time (PT) symmetry, which makes it possible to find exact analytical
solutions for localized modes ("solitons"). The PT-symmetric element is
represented by a point-like (delta-functional) gain-loss dipole
{\delta}^{\prime}(x), combined with the usual attractive potential {\delta}(x).
The nonlinearity is represented by self-focusing (SF) or self-defocusing (SDF)
Kerr terms, both spatially uniform and localized ones. The system can be
implemented in planar optical waveguides. For the sake of comparison, also
introduced is a model with separated {\delta}-functional gain and loss,
embedded into the linear medium and combined with the {\delta}-localized Kerr
nonlinearity and attractive potential. Full analytical solutions for pinned
modes are found in both models. The exact solutions are compared with numerical
counterparts, which are obtained in the gain-loss-dipole model with the
{\delta}^{\prime}- and {\delta}- functions replaced by their Lorentzian
regularization. With the increase of the dipole's strength, {\gamma}, the
single-peak shape of the numerically found mode, supported by the uniform SF
nonlinearity, transforms into a double-peak one. This transition coincides with
the onset of the escape instability of the pinned soliton. In the case of the
SDF uniform nonlinearity, the pinned modes are stable, keeping the single-peak
shape.


title:
Strong coupling behavior of the neutron resonance mode in unconventional
  superconductors

abstract:
  We analyze whether and how the neutron resonance mode in unconventional
superconductors is affected by higher order corrections in the coupling between
spin excitations and fermionic quasiparticles and find that in general such
corrections cannot be ignored. In particular, we find that in two spatial
dimensions (d=2) the corrections are of same order as the leading, weak
coupling contributions demonstrating that the neutron resonance mode in
unconventional superconductors is a strong coupling phenomenon. The origin of
this behavior lies in the quantum-critical nature of the low energy spin
dynamics in the superconducting state and the feedback of the resonance mode
onto the fermionic excitations. While quantum critical fluctuations occur in
any dimensionality smaller than the upper critical dimension d_{uc}=3, they can
be analyzed in a controlled fashion by means of the \epsilon-expansion
(\epsilon =3-d), such that the leading corrections to the resonance mode
position are small. Regardless of the strong coupling nature of the resonance
mode we show that it emerges only if the phase of the superconducting gap
function varies on the Fermi surface, making it a powerful tool to investigate
the microscopic structure of the pair condensate.


title: Expansion Trees with Cut

abstract:
  Herbrand's theorem is one of the most fundamental insights in logic. From the
syntactic point of view it suggests a compact representation of proofs in
classical first- and higher-order logic by recording the information which
instances have been chosen for which quantifiers, known in the literature as
expansion trees.
  Such a representation is inherently analytic and hence corresponds to a
cut-free sequent calculus proof. Recently several extensions of such proof
representations to proofs with cut have been proposed. These extensions are
based on graphical formalisms similar to proof nets and are limited to prenex
formulas.
  In this paper we present a new approach that directly extends expansion trees
by cuts and covers also non-prenex formulas. We describe a cut-elimination
procedure for our expansion trees with cut that is based on the natural
reduction steps. We prove that it is weakly normalizing using methods from the
epsilon-calculus.


title:
Finite group actions on certain stably projectionless C*-algebras with
  the Rohlin property

abstract:
  We introduce the Rohlin property and the approximate representability for
finite group actions on stably projectionless C*-algebras and study their basic
properties. We give some examples of finite group actions on the Razak-Jacelon
algebra and show some classification results of these actions. This study is
based on the work of Izumi, Robert's classification theorem and Kirchberg's
central sequence C*-algebras.


title: Length Distributions in Loop Soups

abstract:
  Statistical lattice ensembles of loops in three or more dimensions typically
have phases in which the longest loops fill a finite fraction of the system. In
such phases it is natural to ask about the distribution of loop lengths. We
show how to calculate moments of these distributions using $CP^{n-1}$ or
$RP^{n-1}$ and O(n) $\sigma$ models together with replica techniques. The
resulting joint length distribution for macroscopic loops is Poisson-Dirichlet
with a parameter $\theta$ fixed by the loop fugacity and by symmetries of the
ensemble. We also discuss features of the length distribution for shorter
loops, and use numerical simulations to test and illustrate our conclusions.


title:
Massive Black Hole binaries in gas-rich galaxy mergers; multiple regimes
  of orbital decay and interplay with gas inflows

abstract:
  We revisit the phases of the pairing and sinking of BHs in galaxy mergers and
circunmunclear disks in light of the results of recent simulations with massive
BHs embedded in predominantly gaseous backgrounds. After a general overview we
discuss the importance of a fast orbital decay regime dominated by global disk
torques rather than by the local dynamical friction wake. This regime can
dominate at BH binary separations of a few tens of parsecs and below, following
a phase of orbital circularization dominated by local dynamical friction. It is
similar to Type-I migration in planetary evolution. It can bring the black
holes to separations small enough for gravitational waves to take over on a
timescale ranging from less than $\sim 10^7$ yr to up to $10^8$ yr, depending
on whether the interstellar medium is smooth or clumpy. Eventual gap opening at
sub-pc scale separations slows down but does not interrupt the orbital
decay.Subsequently, we discuss a new intriguing connection between the
conditions required for rapid orbital decay of massive BH binaries and those
required for prominent gas inflows in gas-rich galaxies. We derive a condition
for the maximum inflow rate that a circumnuclear disk can host while still
maintaining a sufficiently high gas density at large radii to sustain the decay
of a BH binary. We find that gas inflows rates exceeding 10 $M_{\odot}$/yr,
postulated to form massive BH seeds in some direct collapse models, would
stifle the sinking of massive BH binaries in gas-dominated galactic nuclei.
Vice-versa, lower inflow rates, below a solar mass per year, as required to
feed typical AGNs, are compatible with a fast orbital decay of BH binaries
across a wide range of masses.


title: Magnetic arms generated by multiple interfering galactic spiral patterns

abstract:
  Interfering two- and three-arm spiral patterns have previously been inferred
to exist in many galaxies and also in numerical simulations, and invoked to
explain important dynamical properties, such as lack of symmetry, kinks in
spiral arms, and star formation in armlets. The non-axisymmetric galactic
mean-field dynamo model of Chamandy et al. is generalized to allow for such
multiple co-existing spiral patterns in the kinetic alpha_k effect, leading to
the existence of magnetic spiral arms in the large-scale magnetic field with
several new properties. The large-scale magnetic field produced by an evolving
superposition of two- and three-arm (or two- and four-arm) patterns evolves
with time along with the superposition. Magnetic arms can be stronger and more
extended in radius and in azimuth when produced by two interfering patterns
rather than by one pattern acting alone. Transient morphological features arise
in the magnetic arms, including bifurcations, disconnected armlets, and
temporal and spatial variation in arm strength and pitch angles. Pitch angles
of the large-scale magnetic field and magnetic arm structures (ridges) are
smaller than those typically inferred from observations of spiral galaxies for
model parameters of Chamandy et al., but can become comparable to typically
inferred values for certain (still realistic) parameters. The magnetic field is
sometimes strongest in between the alpha_k-arms, unlike in standard models with
a single pattern, where it is strongest within the alpha_k-arms. Moreover, for
models with a two- and three-arm pattern, some amount of m=1 azimuthal symmetry
is found to be present in the magnetic field, which is generally not the case
for forcing by single two- or three-arm patterns. (abridged)


title: The Aftermath of an Exceptional TeV Flare in the AGN Jet of IC 310

abstract:
  The nearby active galaxy IC 310 (z=0.019), located in the Perseus cluster of
galaxies is a bright and variable multi-wavelength emitter from the radio
regime up to very high gamma-ray energies above 100 GeV. Very recently, a
blazar-like compact radio jet has been found by parsec-scale VLBI imaging.
Along with the unusually flat gamma-ray spectrum and variable high-energy
emission, this suggests that IC 310 is the closest known blazar and therefore a
key object for AGN research. As part of an intense observing program at TeV
energies with the MAGIC telescopes, an exceptionally bright flare of IC 310 was
detected in November 2012 reaching a flux level of up to >0.5 Crab units above
300 GeV. We have organized a multi-wavelength follow-up program, including the
VLBA, Effelsberg 100 m, KVA, Swift, INTEGRAL, Fermi/LAT, and the MAGIC
telescopes. We present preliminary results from the multi-wavelength follow-up
program with the focus on the response of the jet to this exceptional gamma-ray
flare.


title:
Phonon-induced topological insulating phases in group IV-VI
  semiconductors

abstract:
  Development of topological insulating phases in IV-VI compounds under dynamic
lattice deformations is studied using first-principles methods. Unlike the
static state of topological phases at equilibrium conditions, we show that
non-trivial topological phases are induced in the compounds by the dynamic
lattice deformations from selective phonon modes. Calculations of the
time-reversal polarization show that the Z2 invariant of the compounds is
flipped by the atomic displacements of selective phonon modes and that the
compounds exhibit oscillating topological phases upon dynamic lattice
deformations. Our results indicate that the elementary excitations in solids
can trigger topological phases in trivial band insulators.


title:
Improved Watermarking Scheme Using Discrete Cosine Transform and Schur
  Decomposition

abstract:
  Watermarking is a technique which consists in introducing a brand, the name
or the logo of the author, in an image in order to protect it against illegal
copy. The capacity of the existing watermark channel is often limited. We
propose in this paper a new robust method which consists in adding the
triangular matrix of the mark obtained after the Schur decomposition to the DCT
transform of the host image. The unitary matrix acts as secret key for the
extraction of the mark. Unlike most watermarking algorithms, the host image and
the mark have the same size. The results show that our method is robust against
attack techniques as : JPEG compression, colors reducing, adding noise,
filtering, cropping, low rotations, and histogram spreading.


title:
Asymmetric bistable reflection and polarization switching in a magnetic
  nonlinear multilayer structure

abstract:
  Optical properties of a one-dimensional photonic structure consisting of
Kerr-type nonlinear and magnetic layers under the action of an external static
magnetic field in the Faraday geometry are investigated. The structure is a
periodic arrangement of alternating nonlinear and magnetic layers (a
one-dimensional photonic crystal) with one of the layers doubled to create a
defect where periodicity is violated. Strong enhancement of nonreciprocity is
observed at the frequencies of the defect modes, where linearly polarized light
incident from one side of the structure undergoes 90 deg polarization rotation
upon reflection, while light reflected from the other side has its polarization
unchanged. Using the nonlinear transfer matrix calculations in the frequency
domain, it is demonstrated that defect resonances in the nonlinear reflection
spectra undergo bending, resulting in polarization bistability of reflected
light. This bistability is shown to result in abrupt switching between linear
polarization of the output reflected light when the input intensity is varied.
This switching is confirmed in finite-difference time-domain simulations, and
its hysteresis character is established.


title: Authentication System Securing Index of Image using SVD and ECC

abstract:
  This paper presents a new approach to securing information stored in a
database. It has three components including: an operation for indexing images
using Singular Value Decomposition (SVD), which will constitute the reference
images, asymmetric encryption operation using Elliptic Curve Cryptosystem
(ECC), aiming to make confidential these reference images stored and a
technique for comparing these images to a query image using the Euclidian
Distance.


title:
Data-driven modeling of systemic delay propagation under severe
  meteorological conditions

abstract:
  The upsetting consequences of weather conditions are well known to any person
involved in air transportation. Still the quantification of how these
disturbances affect delay propagation and the effectiveness of managers and
pilots interventions to prevent possible large-scale system failures needs
further attention. In this work, we employ an agent-based data-driven model
developed using real flight performance registers for the entire US airport
network and focus on the events occurring on October 27 2010 in the United
States. A major storm complex that was later called the 2010 Superstorm took
place that day. Our model correctly reproduces the evolution of the
delay-spreading dynamics. By considering different intervention measures, we
can even improve the model predictions getting closer to the real delay data.
Our model can thus be of help to managers as a tool to assess different
intervention measures in order to diminish the impact of disruptive conditions
in the air transport system.


title: Control of Spin in La(Mn,Zn)AsO Alloy by Carrier Doping

abstract:
  The control of spin without magnetic field is one of challenges in developing
spintronic devices. In an attempt to solve this problem, we proposed a novel
hypothetic LaMn0.5Zn0.5AsO alloy from two experimentally synthesized rare earth
element transition metal arsenide oxides, i.e. LaMnAsO and LaZnAsO. On the
basis of the first-principles calculations with strong-correlated correction,
we found that the LaMn0.5Zn0.5AsO alloy is an antiferromagnetic semiconductor
at ground state, while bipolar magnetic semiconductor at ferromagnetic state.
Both electron and hole doping in the LaMn0.5Zn0.5AsO alloy induces the
transition from antiferromagnetic to ferromagnetic, as well as semiconductor to
half metal. In particular, the spin-polarization direction is switchable
depending on the doped carrier's type. As carrier doping can be realized easily
in experiment by applying a gate voltage, the LaMn0.5Zn0.5AsO alloy stands for
a promising spintronic material to generate and control the spin-polarized
carriers with electric field.


title:
Electronic stopping power of hydrogen in a high-k material at the
  stopping maximum and below

abstract:
  Electronic energy loss of hydrogen ions in HfO2 was investigated in a wide
energy range in the medium and low energy ion scattering regime. Experiments by
Time-Of-Flight Medium-Energy Ion Scattering (TOF-MEIS) with proton and deuteron
projectiles were performed in backscattering geometry for nm-films of HfO2 on
Si with an ultrathin SiO2 interface layer prepared by ALD. At energies around
the stopping maximum excellent agreement is found with earlier results from
Behar et al. (Phys. Rev. A 80 (2009) 062901) and theoretical predictions.
Towards lower energies discrepancies between experiment and calculations
increase slightly. The low energy data exhibits excellent velocity
proportionality and indicates the absence of clear effects due to distinct
electronic states. Thus, also no apparent velocity threshold can be predicted
within the experiments uncertainty from the present data. The magnitude of the
energy loss is discussed in terms of a free-electron model and compared with
the expected electron densities from plasmon frequencies.


title: On countably skewed Brownian motion with accumulation point

abstract:
  In this work we connect the theory of Dirichlet forms and direct stochastic
calculus to obtain strong existence and pathwise uniqueness for Brownian motion
that is perturbed by a series of constant multiples of local times at a
sequence of points that has exactly one accumulation point in $\mathbb{R}$. The
considered process is identified as special distorted Brownian motion $X$ in
dimension one and is studied thoroughly. Besides strong uniqueness, we present
necessary and sufficient conditions for non-explosion, recurrence and positive
recurrence as well as for $X$ to be semimartingale and possible applications to
advection-diffusion in layered media.


title:
The Role of a Flux Rope Ejection in Three-dimensional
  Magnetohydrodynamic Simulation of a Solar Flare

abstract:
  We investigated the dynamic evolution of a 3-dimensional (3D) flux rope
eruption and magnetic reconnection process in a solar flare, by simply
extending 2-dimensional (2D) resistive magnetohydrodynamic simulation model of
solar flares with low $\beta$ plasma to 3D model. We succeeded in reproducing a
current sheet and bi-directional reconnection outflows just below the flux rope
during the eruption in our 3D simulations. We calculated four cases of a
strongly twisted flux rope and a weakly twisted flux rope in 2D and 3D
simulations. The time evolution of a weakly twisted flux rope in 3D simulation
shows similar behaviors to 2D simulation, while a strongly twisted flux rope in
3D simulation shows clearly different time evolution from 2D simulation except
for the initial phase evolution. The ejection speeds of both strongly and
weakly twisted flux ropes in 3D simulations are larger than 2D simulations, and
the reconnection rates in 3D cases are also larger than 2D cases. This
indicates a positive feedback between the ejection speed of a flux rope and the
reconnection rate even in the 3D simulation, and we conclude that the
plasmoid-induced reconnection model can be applied to 3D. We also found that
small scale plasmoids are formed inside a current sheet and make it turbulent.
These small scale plasmoid ejections has role in locally increasing
reconnection rate intermittently as observed in solar flares, coupled with a
global eruption of a flux rope.


title:
Final results of Borexino Phase-I on low energy solar neutrino
  spectroscopy

abstract:
  Borexino has been running since May 2007 at the LNGS with the primary goal of
detecting solar neutrinos. The detector, a large, unsegmented liquid
scintillator calorimeter characterized by unprecedented low levels of intrinsic
radioactivity, is optimized for the study of the lower energy part of the
spectrum. During the Phase-I (2007-2010) Borexino first detected and then
precisely measured the flux of the 7Be solar neutrinos, ruled out any
significant day-night asymmetry of their interaction rate, made the first
direct observation of the pep neutrinos, and set the tightest upper limit on
the flux of CNO neutrinos. In this paper we discuss the signal signature and
provide a comprehensive description of the backgrounds, quantify their event
rates, describe the methods for their identification, selection or subtraction,
and describe data analysis. Key features are an extensive in situ calibration
program using radioactive sources, the detailed modeling of the detector
response, the ability to define an innermost fiducial volume with extremely low
background via software cuts, and the excellent pulse-shape discrimination
capability of the scintillator that allows particle identification. We report a
measurement of the annual modulation of the 7 Be neutrino interaction rate. The
period, the amplitude, and the phase of the observed modulation are consistent
with the solar origin of these events, and the absence of their annual
modulation is rejected with higher than 99% C.L. The physics implications of
phase-I results in the context of the neutrino oscillation physics and solar
models are presented.


title: Electronic structure modification of Si-nanocrystals with F4 -TCNQ

abstract:
  We use first-principles models to demonstrate how an organic oxidizing agent,
F4 -TCNQ (7,7,8,8- tetracyano-2,3,5,6-tetrafluoroquinodimethane), modifies the
electronic structure of silicon nanocrys- tals, suggesting it may enhance
p-type carrier density and mobility. The proximity of the lowest unoccupied
level of F4 -TCNQ to the highest occupied level of the Si-nanocrystals promotes
the formation of an empty hybrid state overlapping both nanocrystal and
molecule, reducing the exci- tation energy to about 0.8-1 eV in vacuum. Hence,
it is suggested that F4 -TCNQ can serve both as a surface oxidant and a
mediator for hole hopping between adjacent nanocrystals.


title: Variational principles for topological pressures on subsets

abstract:
  The goal of this paper is to define and investigate those topological
pressures, which is an extension of topological entropy presented by Feng and
Huang [13], of continuous transformations. This study reveals the similarity
between many known results of topological pressure. More precisely, the
investigation of the variational principle is given and related propositions
are also described. That is, this paper defines the measure theoretic pressure
$P_{\mu}(T,f)$ for any $\mu\in{\mathcal M(X)}$, and shows that
$P_B(T,f,K)=\sup\bigr\{P_{\mu}(T,f):{\mu}\in{\mathcalM(X)},{\mu}(K)=1\bigr\}$,
where $K\subseteq X$ is a non-empty compact subset and $P_B(T,f,K)$ is the
Bowen topological pressure on $K$. Furthermore, if $Z\subseteq X$ is an
analytic subset, then $P_B(T,f,Z)=\sup\bigr\{P_B(T,f,K):K\subseteq Z\ \text{is
compact}\bigr\}$. However, this analysis relies on more techniques of ergodic
theory and topological dynamics.


title:
Sizes of main-belt asteroids by combining shape models and Keck adaptive
  aptics observations

abstract:
  We select 50 main-belt asteroids with a diameter between 20 and 400 km for
which we have (i) shape models derived by the lightcurve inversion method (LI)
and (ii) resolved observations of good quality collected with the Keck II
adaptive optics (AO) system in the near-infrared. We derive the size of these
asteroids by minimizing the difference between the contours from deconvolved AO
images and the projected silhouettes calculated from the shape model at the
time of the AO observations. We compute the volume-equivalent diameters for 48
of these asteroids. For 15 of them, we remove the ambiguity of the pole
orientation typical for shape models derived by the LI. We have found that our
equivalent diameters are smaller by 3%, 7%, and 2% compared with the effective
diameters derived from mid-IR photometric observations provided by IRAS, WISE
and AKARI. For 40 asteroids with previously determined mass estimates, we
compute their bulk densities and discuss the mass-density dependence with
respect to taxonomic types.


title: Comment on "Bayes' Theorem in the 21st Century" by Bradley Efron

abstract:
  In a Perspectives article in Science, Bradley Efron concludes that Bayesian
calculations cannot be uncritically accepted when using uninformative priors.
We argue that this conclusion is problematic because Efron's example does not
use data, hence it is not Bayesian statistics; his priors make little sense and
are not uninformative; and using the available data point and an uninformative
prior actually leads to a reasonable posterior distribution.


title:
Proposal to generate 10 TW level femtosecond x-ray pulses from a
  baseline undulator in conventional SASE regime at the European XFEL

abstract:
  Output characteristics of the European XFEL have been previously studied
assuming an operation point at 5 kA peak current. In this paper we explore the
possibility to go well beyond such nominal peak current level. In order to
illustrate the potential of the European XFEL accelerator complex we consider a
bunch with 0.25 nC charge, compressed up to a peak current of 45 kA. An
advantage of operating at such high peak current is the increase of the x-ray
output peak power without any modification to the baseline design. Based on
start-to-end simulations, we demonstrate that such high peak current, combined
with undulator tapering, allows one to achieve up to a 100-fold increase in a
peak power in the conventional SASE regime, compared to the nominal mode of
operation. In particular, we find that 10 TW-power level, femtosecond x-ray
pulses can be generated in the photon energy range between 3 keV and 5 keV,
which is optimal for single biomolecule imaging. Our simulations are based on
the exploitation of all the 21 cells foreseen for the SASE3 undulator beamline,
and indicate that one can achieve diffraction to the desired resolution with 15
mJ (corresponding to about 3e13 photons) in pulses of about 3 fs, in the case
of a 100 nm focus at the photon energy of 3.5 keV.


title: A general parametric model for the dynamic dark energy

abstract:
  In the present work we suggest new and more generalized parameterizations for
the Equation of State, EoS, of dark energy, maintaining the basic structure of
two-parameters CPL-model, but covering both the past and the future of the
cosmic history, without divergences and consistently with the current
observational data. We propose two generalizations, starting from the extended
MZp-model by Ma and Zhang, 2011, the $\xi$MZp-model and the DFp-model. The
potential advantages of using these new formulations is their extended range of
validity, mainly in the future, to determine possible future scenarios of the
cosmic evolution.


title:
Spin pumping damping and magnetic proximity effect in Pd and Pt
  spin-sink layers

abstract:
  We investigated the spin pumping damping contributed by paramagnetic layers
(Pd, Pt) in both direct and indirect contact with ferromagnetic
Ni$_{81}$Fe$_{19}$ films. We find a nearly linear dependence of the
interface-related Gilbert damping enhancement $\Delta\alpha$ on the heavy-metal
spin-sink layer thicknesses t$_\textrm{N}$ in direct-contact
Ni$_{81}$Fe$_{19}$/(Pd, Pt) junctions, whereas an exponential dependence is
observed when Ni$_{81}$Fe$_{19}$ and (Pd, Pt) are separated by \unit[3]{nm} Cu.
We attribute the quasi-linear thickness dependence to the presence of induced
moments in Pt, Pd near the interface with Ni$_{81}$Fe$_{19}$, quantified using
X-ray magnetic circular dichroism (XMCD) measurements. Our results show that
the scattering of pure spin current is configuration-dependent in these systems
and cannot be described by a single characteristic length.


title:
Uniform approximation of fractional derivatives and integrals with
  application to fractional differential equations

abstract:
  It is well known that for every $f\in C^m$ there exists a polynomial $p_n$
such that $p^{(k)}_n\rightarrow f^{(k)}$, $k=0,\ldots,m$. Here we prove such a
result for fractional (non-integer) derivatives. Moreover, a numerical method
is proposed for fractional differential equations. The convergence rate and
stability of the proposed method are obtained. Illustrative examples are
discussed.


title:
Three jet production and gluon saturation effects in p-p and p-Pb
  collisions within high-energy factorization

abstract:
  We analyze three jet production in the central-forward and forward rapidity
regions in proton-proton and proton-lead collisions at LHC energies. Our
calculation relies on high-energy factorization with a single off-shell gluon
obeying small x evolution equation which includes saturation. The calculations
are made using two independent Monte Carlo codes implementing tree-level gauge
invariant off-shell matrix elements. We calculate differential cross sections
for azimuthal decorrelations and unbalanced jet transverse momenta and discuss
them in the context of differences in the evolution of the unintegrated gluon
densities.


title: Entanglement generation in quantum networks of Bose-Einstein condensates

abstract:
  Two component (spinor) Bose-Einstein condensates (BECs) are considered as the
nodes of an interconnected quantum network. Unlike standard single-system
qubits, in a BEC the quantum information is duplicated in a large number of
identical bosonic particles, thus can be considered to be a "macroscopic"
qubit. One of the difficulties with such a system is how to effectively
interact such qubits together in order to transfer quantum information and
create entanglement. Here we propose a scheme of cavities containing spinor
BECs coupled by optical fiber in order to achieve this task. We discuss
entanglement generation and quantum state transfer between nodes using such
macroscopic BEC qubits.


title: Tropicalizing the simplex algorithm

abstract:
  We develop a tropical analog of the simplex algorithm for linear programming.
In particular, we obtain a combinatorial algorithm to perform one tropical
pivoting step, including the computation of reduced costs, in O(n(m+n)) time,
where m is the number of constraints and n is the dimension.


title: New RIC Bounds via l_q-minimization with 0<q<=1 in Compressed Sensing

abstract:
  The restricted isometry constants (RICs) play an important role in exact
recovery theory of sparse signals via l_q(0<q<=1) relaxations in compressed
sensing. Recently, Cai and Zhang[6] have achieved a sharp bound
\delta_tk<\sqrt{1-1/t} for t>=4/3 to guarantee the exact recovery of k sparse
signals through the l_1 minimization. This paper aims to establish new RICs
bounds via l_q(0<q<=1) relaxation. Based on a key inequality on l_q norm, we
show that (i) the exact recovery can be succeeded via l_{1/2} and l_1
minimizations if \delta_tk<\sqrt{1-1/t} for any t>1, (ii)several sufficient
conditions can be derived, such as for any 0<q<1/2, \delta_2k<0.5547 when k>=2,
for any 1/2<q<1, \delta_2k<0.6782 when k>=1, (iii) the bound on \delta_k is
given as well for any 0<q<=1, especially for q=1/2,1, we obtain \delta_k<1/3
when k(>=2) is even or \delta_k<0.3203 when k(>=3) is odd.


title:
Precision Quantum Hall Resistance Measurement on Epitaxial Graphene
  Device in Low Magnetic Field

abstract:
  Precision quantum Hall resistance (QHR) measurements were performed on
large-area epitaxial graphene device at low magnetic fields (B = 2 T - 8 T) at
temperature T = 1.5 K. Hall resistance was measured using Cryogenic Current
Comparator resistance bridge with high biasing current Isd = 40 micro ampere.
The results showed that at B = 8 T the relative deviation of Hall resistance
from the expected quantized value h/2e2 is within experimental uncertainty of
3.5 parts in 108 and remained below 0.35 parts per million (ppm) down to B = 3
T.


title: Judo match analysis,a powerful coaching tool, basic and advanced tools

abstract:
  In this second paper on match analysis, we analyze in deep the competition
steps showing the evolution of this tool at National Federation level.On the
basis of our,first classification. Furthermore, it is the most important source
of technical assessment. Studying competition with this tool is essential for
the coaches because they can obtain useful information for their coaching.
Match Analysis is today the master key in situation sports like Judo, to help
in useful way the difficult task of coach or best for National or Olympic
coaching equips. In this paper it is presented a deeper study of the judo
competitions at high level both from the male and female point of view,
explaining at light of biomechanics, not only the throws evolution in time,
introduction of Innovative and Chaotic techniques, but also the evolution of
fighting style in these high level competitions, both connected with the grow
of this Olympic Sport in the Word Arena. It is shown how new interesting ways
are opened by this powerful coaching tool, very useful for National team
technical management.In the last part of this paper we analyze advanced
mathematical tools describing Couple of Athletes motion as Fractal Poisson
Point Processes based on Fractional Brownian Motion to show how strategic
evaluation, probability and short term forecast can be applied to Judo
competition.


title:
The effects of dust on the photometric parameters of decomposed disks
  and bulges

abstract:
  We present results of a study to quantify the effects of dust on the derived
photometric parameters of disk and bulges obtained from bulge-disk
decomposition: scale-length, effective radius, Sersic index, disk axis-ratio,
and bulge-to-disk ratio. The dust induced changes in these parameters were
obtained by fitting simulated images of composite systems (containing a disk
and a bulge) produced using radiative transfer calculations. The simulations
were fitted with the GALFIT 3.0.2 data analysis algorithm. Fits were done with
both a combination of an exponential plus a variable-index Sersic function as
well as with a combination of two variable-index Sersic functions. We find that
dust is biasing the derived exponential scale-length of decomposed disks
towards smaller values than would be otherwise derived if the galaxy were to
have no bulge. Similarly, the derived bulge-to-disk ratio is biased towards
smaller values. However, the derived axis-ratio of the disk is not changed in
the decomposition process. The derived effective radius of decomposed disks of
systems having exponential bulges is found to be less affected by dust when
fits are done with two variable-index Sersic functions. For the same type of
fits dust is found to bias the value of the derived effective radius of
decomposed disks towards lower values for systems having de Vaucouleurs bulges.
All corrections derived in this paper are made available in electronic form.


title:
Strange Mass Corrections to Hyperonic Semi-leptonic Decay in Statistical
  Model

abstract:
  The spin distributions, weak decay matrix elements for strange baryon octets
with SU(3) breaking effects is studied. We systematically apply operator
formalism along with statistical method to study JP= strange baryon octets for
their low energy properties. Baryon is taken as an ensemble of quark-gluon Fock
states in sea with three valence quarks to have spin-1/2, color-1 and flavor-8
quantum numbers. Detailed balance principle is applied to calculate the
probabilities of each Fock states, with the inclusion of mass correction of
strange quark in order to check the SU(3) breaking in weak decays constants and
spin distributions. A dominant contribution from the vector sea is verified as
compared to scalar and tensor sea, also the symmetry breaking correction leads
to the deviations in the value of axial vector matrix elements ratio from
experimental values by 17%. Present framework suggests a stronger base to
choose statistical model with detailed balance principle to verify the
experimental and theoretical values available and hence provide a deeper
understanding to the strange baryon structure. Symmetry breaking effects lead
to reduction in the values of axial matrix elements. Its contribution has a
significant role in determining the validity of present approach.


title:
Neutrinoless $\beta \beta $ decay transition matrix elements within
  mechanisms involving light Majorana neutrinos, classical Majorons and sterile
  neutrinos

abstract:
  In the PHFB model, uncertainties in the nuclear transition matrix elements
for the neutrinoless double-$\beta $ decay of $\ ^{94,96}$Zr, $^{98,100}$Mo,
$^{104}$Ru, $^{110}$Pd, $^{128,130}$Te and $^{150}$Nd isotopes within
mechanisms involving light Majorana neutrinos, classical Majorons and sterile
neutrinos are statistically estimated by considering sets of sixteen
(twenty-four) matrix elements calculated with four different parametrization of
the pairing plus multipolar type of effective two-body interaction, two sets of
form factors and two (three) different parameterizations of Jastrow type of
short range correlations. In the mechanisms involving the light Majorana
neutrinos and classical Majorons, the maximum uncertainty is about 15% and in
the scenario of sterile neutrinos, it varies in between approximately 4
(9)%--20 (36)% without(with) Jastrow short range correlations with
Miller-Spencer parametrization, depending on the considered mass of the sterile
neutrinos.


title:
Supersymmetric Chern-Simons Vortex Systems and Extended Supersymmetric
  Quantum Mechanics Algebras

abstract:
  We study N=2 supersymmetric Chern-Simons Higgs models in $(2+1)$-dimensions
and the existence of extended underlying supersymmetric quantum mechanics
algebras. Our findings indicate that the fermionic zero modes quantum system in
conjunction with the system of zero modes corresponding to bosonic
fluctuations, are related to an N=4 extended 1-dimensional supersymmetric
algebra with central charge, a result closely connected to the N=2 spacetime
supersymmetry of the total system. We also add soft supersymmetric terms to the
fermionic sector in order to examine how this affects the index of the
corresponding Dirac operator, with the latter characterizing the degeneracy of
the solitonic solutions. In addition, we analyze the impact of the underlying
supersymmetric quantum algebras to the zero mode bosonic fluctuations. This is
relevant to the quantum theory of self-dual vortices and particularly for the
symmetries of the metric of the space of vortices solutions and also for the
non-zero mode states of bosonic fluctuations.


title: Global splittings and super Harish-Chandra pairs for affine supergroups

abstract:
  This paper dwells upon two aspects of affine supergroup theory, investigating
the links among them.
  First, I discuss the "splitting" properties of affine supergroups, i.e.
special kinds of factorizations they may admit - either globally, or pointwise.
  Second, I present a new contribution to the study of affine supergroups by
means of super Harish-Chandra pairs (a method already introduced by Koszul, and
later extended by other authors). Namely, I provide an explicit, functorial
construction \Psi which, with each super Harish-Chandra pair, associates an
affine supergroup that is always globally strongly split (in short, gs-split) -
thus setting a link with the first part of the paper. On the other hand, there
exists a natural functor \Phi from affine supergroups to super Harish-Chandra
pairs: then I show that the new functor \Psi - which goes the other way round -
is indeed a quasi-inverse to \Phi, provided we restrict our attention to the
subcategory of affine supergroups that are gs-split. Therefore, (the
restrictions of) \Phi and \Psi are equivalences between the categories of
gs-split affine supergroups and of super Harish-Chandra pairs. Such a result
was known in other contexts, such as the smooth differential or the complex
analytic one, or in some special cases, via different approaches: the novelty
in the present paper lies in that I construct a different functor \Psi and thus
extend the result to a much larger setup, with a totally different, more
geometrical method (very concrete indeed, and characteristic free).
  The case of linear algebraic groups is treated also as an intermediate,
inspiring step.
  Some examples, applications and further generalizations are presented at the
end of the paper.


title:
Testable two-loop radiative neutrino mass model based on an $LLQd^cQd^c$
  effective operator

abstract:
  A new two-loop radiative Majorana neutrino mass model is constructed from the
gauge-invariant effective operator $L^i L^j Q^k d^c Q^l d^c \epsilon_{ik}
\epsilon_{jl}$ that violates lepton number conservation by two units. The
ultraviolet completion features two scalar leptoquark flavors and a color-octet
Majorana fermion. We show that there exists a region of parameter space where
the neutrino oscillation data can be fitted while simultaneously meeting
flavor-violation and collider bounds. The model is testable through lepton
flavor-violating processes such as ${\mu} \to e{\gamma}$, $\mu \to eee$, and
$\mu N \to eN$ conversion, as well as collider searches for the scalar
leptoquarks and color-octet fermion. We computed and compiled a list of
necessary Passarino-Veltman integrals up to boxes in the approximation of
vanishing external momenta and made them available as a Mathematica package,
denoted as ANT.


title:
Laser-based acceleration of non-relativistic electrons at a dielectric
  structure

abstract:
  A proof-of-principle experiment demonstrating dielectric laser acceleration
of non-relativistic electrons in the vicinity of a fused-silica grating is
reported. The grating structure is utilized to generate an electromagnetic
surface wave that travels synchronously with and efficiently imparts momentum
on 28keV electrons. We observe a maximum acceleration gradient of 25MeV/m. We
investigate in detail the parameter dependencies and find excellent agreement
with numerical simulations. With the availability of compact and efficient
fiber laser technology, these findings may pave the way towards an all-optical
compact particle accelerator. This work also represents the demonstration of
the inverse Smith-Purcell effect in the optical regime.


title:
Measurement of Neutrino Oscillation Parameters from Muon Neutrino
  Disappearance with an Off-axis Beam

abstract:
  The T2K collaboration reports a precision measurement of muon neutrino
disappearance with an off-axis neutrino beam with a peak energy of 0.6 GeV.
Near detector measurements are used to constrain the neutrino flux and cross
section parameters. The Super-Kamiokande far detector, which is 295 km
downstream of the neutrino production target, collected data corresponding to
$3.01 \times 10^{20}$ protons on target. In the absence of neutrino
oscillations, $205 \pm 17$ (syst.) events are expected to be detected and only
58 muon neutrino event candidates are observed. A fit to the neutrino rate and
energy spectrum assuming three neutrino flavors, normal mass hierarchy and
$\theta_{23}\leq \pi/4$ yields a best-fit mixing angle
$\sin^2(2\theta_{23})=1.000$ and mass splitting $|\Delta m^2_{32}| =2.44 \times
10^{-3}$ eV$^2$/c$^4$. If $\theta_{23}\geq \pi/4$ is assumed, the best-fit
mixing angle changes to $\sin^2(2\theta_{23})=0.999$ and the mass splitting
remains unchanged.


title: Peripheral downflows in sunspot penumbrae

abstract:
  Sunspot penumbrae show high-velocity patches along the periphery. The
high-velocity downflow patches are believed to be the return channels of the
Evershed flow. We aim to investigate their structure in detail using Hinode
SOT/SP observations. We employ Fourier interpolation in combination with
spatially coupled height dependent LTE inversions of Stokes profiles to produce
high-resolution, height-dependent maps of atmospheric parameters of these
downflows and investigate their properties. High-speed downflows are observed
over a wide range of viewing angles. They have supersonic line-of-sight
velocities, some in excess of 20km/s, and very high magnetic field strengths,
reaching values of over 7 kG. A relation between the downflow velocities and
the magnetic field strength is found, in good agreement with MHD simulations.
The coupled inversion at high resolution allows for the accurate determination
of small-scale structures. The recovered atmospheric structure indicates that
regions with very high downflow velocities contain some of the strongest
magnetic fields that have ever been measured on the Sun.


title:
Structure and different realizations of the extended real Clifford-Dirac
  algebra

abstract:
  The structure of the 64-dimensional extended real Clifford-Dirac (ERCD)
algebra, which has been introduced in our paper Phys. Lett. A. 375 (2011) 2479,
is under consideration. The subalgebras of this algebra are investigated: the
29-dimensional proper ERCD algebra and 32-dimensional pure matrix algebra of
invariance of the Dirac equation in the Foldy-Wouthuysen representation. The
last one is the maximal pure matrix algebra of invariance of this equation. The
different realizations of the proper ERCD algebra are given. The application of
proper ERCD algebra is illustrated on the example of the derivation of the
hidden spin (1,0) Poincare symmetry of the Dirac equation.


title:
Vortical and fundamental solitons in dipolar Bose-Einstein condensates
  trapped in isotropic and anisotropic nonlinear potentials

abstract:
  We predict the existence of stable fundamental and vortical bright solitons
in dipolar Bose-Einstein condensates (BECs) with repulsive dipole-dipole
interactions (DDI). The condensate is trapped in the 2D plane with the help of
the repulsive contact interactions whose local strength grows $\sim r^{4}$ from
the center to periphery, while dipoles are oriented perpendicular to the
self-trapping plane. The confinement in the perpendicular direction is provided
by the usual harmonic-oscillator potential. The objective is to extend the
recently induced concept of the self-trapping of bright solitons and solitary
vortices in the pseudopotential, which is induced by the repulsive local
nonlinearity with the strength growing from the center to periphery, to the
case when the trapping mechanism competes with the long-range repulsive DDI.
Another objective is to extend the analysis for elliptic vortices and solitons
in an anisotropic nonlinear pseudopotential. Using the variational
approximation (VA) and numerical simulations, we construct families of
self-trapped modes with vorticities $\ell =0$ (fundamental solitons), $\ell
=1$, and $\ell =2$. The fundamental solitons and vortices with $\ell =1$ exist
up to respective critical values of the eccentricity of the anisotropic
pseudopotential, being stable in the entire existence regions. The vortices
with $\ell =2$ are stable solely in the isotropic model.


title: Bayesian Motion Estimation for Dust Aerosols

abstract:
  Dust storms in the earth's major desert regions significantly influence
microphysical weather processes, the CO$_2$-cycle and the global climate in
general. Recent increases in the spatio-temporal resolution of remote sensing
instruments have created new opportunities to understand these phenomena.
However, the scale of the data collected and the inherent stochasticity of the
underlying process pose significant challenges, requiring a careful combination
of image processing and statistical techniques. In particular, using satellite
imagery data, we develop a statistical model of atmospheric transport that
relies on a latent Gaussian Markov random field (GMRF) for inference. In doing
so, we make a link between the optical flow method of Horn and Schunck and the
formulation of the transport process as a latent field in a generalized linear
model, which enables the use of the integrated nested Laplace approximation for
inference. This framework is specified such that it satisfies the so-called
integrated continuity equation, thereby intrinsically expressing the divergence
of the field as a multiplicative factor covering air compressibility and
satellite column projection. The importance of this step -- as well as treating
the problem in a fully statistical manner -- is emphasized by a simulation
study where inference based on this latent GMRF clearly reduces errors of the
estimated flow field. We conclude with a study of the dynamics of dust storms
formed over Saharan Africa and show that our methodology is able to accurately
and coherently track the storm movement, a critical problem in this field.


title: Temperature dependence of dielectric constants in Titanium Nitride

abstract:
  The temperature dependence of optical constants of titanium nitride thin film
is investigated using spectroscopic ellipsometry between 1.4 to 5 eV in the
temperature range 300 K to 650 K in steps of 50 K. The real and imaginary parts
of the dielectric functions "1(E) and "2(E) increase marginally with increase
in temperature. A Drude Lorentz dielectric analysis based on free electron and
oscillator model are carried out to describe the temperature behavior. The
parameters of the Lorentz oscillator model also showed that the relaxation time
decreased with temperature while the oscillator energies increased. This study
shows that owing to marginal change in the refractive index with temperature,
titanium nitride can be employed for surface plasmon sensor applications even
in environments where rise in temperature is imminent.