title:
On the completeness of quantum mechanics and the interpretation of the
  state vector

abstract:
  Recently, it has been argued that quantum mechanics is complete, and that
quantum states vectors are necessarily in one-to-one correspondence with the
elements of reality, under the assumptions that quantum theory is correct and
that measurement settings can be freely chosen. In this work, we argue that the
adopted form of the free choice assumption is stronger than needed. We unveil
hidden assumptions underlying these results, which limit their range of
validity. We support our argument by a model for the bipartite two-level
system, reproducing quantum mechanics, in which the free will assumption is
respected, and different quantum states can be connected to the same state of
reality.


title: The triangle-free process and the Ramsey number $R(3,k)$

abstract:
  The areas of Ramsey theory and random graphs have been closely linked ever
since Erd\H{o}s' famous proof in 1947 that the 'diagonal' Ramsey numbers $R(k)$
grow exponentially in $k$. In the early 1990s, the triangle-free process was
introduced as a model which might potentially provide good lower bounds for the
'off-diagonal' Ramsey numbers $R(3,k)$. In this model, edges of $K_n$ are
introduced one-by-one at random and added to the graph if they do not create a
triangle; the resulting final (random) graph is denoted $G_{n,\triangle}$. In
2009, Bohman succeeded in following this process for a positive fraction of its
duration, and thus obtained a second proof of Kim's celebrated result that
$R(3,k) = \Theta \big( k^2 / \log k \big)$.
  In this paper we improve the results of both Bohman and Kim, and follow the
triangle-free process all the way to its asymptotic end. In particular, we
shall prove that $$e\big( G_{n,\triangle} \big) \,=\, \left(
\frac{1}{2\sqrt{2}} + o(1) \right) n^{3/2} \sqrt{\log n },$$ with high
probability as $n \to \infty$. We also obtain several pseudorandom properties
of $G_{n,\triangle}$, and use them to bound its independence number, which
gives as an immediate corollary $$R(3,k) \, \ge \, \left( \frac{1}{4} - o(1)
\right) \frac{k^2}{\log k}.$$ This significantly improves Kim's lower bound,
and is within a factor of $4 + o(1)$ of the best known upper bound, proved by
Shearer over 25 years ago.


title: Thermal Conductivity of Supercooled Water

abstract:
  The heat capacity of supercooled water, measured down to -37 {\deg}C, shows
an anomalous increase as temperature decreases. The thermal diffusivity, i. e.,
the ratio of the thermal conductivity and the heat capacity per unit volume,
shows a decrease. These anomalies may be associated with a hypothetical
liquid-liquid critical point in supercooled water below the line of homogeneous
nucleation. However, while the thermal conductivity is known to diverge at the
vapor-liquid critical point due to critical density fluctuations, the thermal
conductivity of supercooled water, calculated as the product of thermal
diffusivity and heat capacity, does not show any sign of such an anomaly. We
have used mode-coupling theory to investigate the possible effect of critical
fluctuations on the thermal conductivity of supercooled water, and found that
indeed any critical thermal-conductivity enhancement would be too small to be
measurable at experimentally accessible temperatures. Moreover, the behavior of
thermal conductivity can be explained by the observed anomalies of the
thermodynamic properties. In particular, we show that thermal conductivity
should go through a minimum as temperature is decreased, as Kumar and Stanley
observed in the TIP5P model of water. We discuss physical reasons for the
striking difference between the behavior of thermal conductivity in water near
the vapor-liquid and liquid-liquid critical points.


title:
Robustness of Spin-Triplet Pairing and Singlet-Triplet Pairing Crossover
  in Superconductor/Ferromagnet Hybrids

abstract:
  We have investigated the proximity effect in superconductor/ferromagnet
junctions in a systematic manner to discuss the relationship between the
zero-energy peak (ZEP) of the local density of states (LDOS) and spin-triplet
odd-frequency pairing. By exactly solving the nonlinear Usadel equations, we
have found that the ZEP is realized in a wide range of geometrical and material
parameters in the case of the noncollinear magnetization. This strongly
suggests the robustness of the ZEP induced by spin-triplet odd-frequency
pairing in such systems. We also found that the crossover from singlet pairing
to triplet pairing can be detected by measuring the F layer thickness
dependence of the ZEP height. Furthermore, we show how to observe signatures of
spin-triplet odd-frequency pairing and the pairing crossover by LDOS
measurement. Our results provide a direct way to experimentally detect
signatures of the odd-frequency pairing state.


title:
The Drastic Role of Beyond Nearest-Neighbor Interactions on
  Two-Dimensional Dynamical Lattices: A Case Example

abstract:
  In the present work, we highlight the significant effect that the simplest
beyond nearest neighbor interactions can have on two-dimensional dynamical
lattices. To do so, we select as our case example the closest further neighbor,
namely the diagonal one, and a prototypical nonlinear lattice, the discrete
nonlinear Schrodinger equation. Varying solely the strength of this extra
neighbor interaction, we see examples of (a) destabilization of states that
start out as stable in the nearest neighbor limit; (b) stabilization of states
that start out as unstable in that limit; (c) bifurcation of novel states that
do not exist in the nearest neighbor case. These dramatic changes are first
theoretically highlighted through an analysis of a reduction of the problem to
a few excited sites and the associated set of conditions that govern their
existence and their dynamical stability. Then, they are corroborated
numerically through fixed point computations, spectral analysis and nonlinear
dynamical evolution simulations.


title: CAST constraints on the axion-electron coupling

abstract:
  In non-hadronic axion models, which have a tree-level axion-electron
interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton
scattering, and axio-recombination, the "BCA processes." Based on a new
calculation of this flux, including for the first time axio-recombination, we
derive limits on the axion-electron Yukawa coupling g_ae and axion-photon
interaction strength g_ag using the CAST phase-I data (vacuum phase). For m_a <
10 meV/c2 we find g_ag x g_ae< 8.1 x 10^-23 GeV^-1 at 95% CL. We stress that a
next-generation axion helioscope such as the proposed IAXO could push this
sensitivity into a range beyond stellar energy-loss limits and test the
hypothesis that white-dwarf cooling is dominated by axion emission.


title:
Simulating open quantum systems by applying SU(4) to quantum master
  equations

abstract:
  We show that open quantum systems of two-level atoms symmetrically coupled to
a single-mode photon field can be efficiently simulated by applying a SU(4)
group theory to quantum master equations. This is important since many
foundational examples in quantum optics fall into this class. We demonstrate
the method by finding exact solutions for many-atom open quantum systems such
as lasing and steady state superradiance.


title:
Photometric and Spectroscopic Properties of Novae in the Large
  Magellanic Cloud

abstract:
  The photometric and spectroscopic properties of the 43 known LMC nova
candidates are summarized and reviewed. Of these, photometric data sufficient
to establish decline rates are available for 29 novae, while spectroscopic data
sufficient to establish the spectroscopic classes are available for 18 systems.
Half of the 18 novae belong to the Fe II class, with the remaining nine
belonging to either the He/N or the Fe IIb classes. As seen in previous nova
studies of M31 and M33, the He/N and Fe IIb novae have on average faster
photometric developments than do their Fe II counterparts. Overall, the
available photometry confirms earlier studies, and shows conclusively that LMC
novae have faster rates of decline than do novae in the Galaxy and M31. It
appears that the increased fraction of faster, He/N and Fe IIb novae observed
in the LMC compared with M31 is almost certainly the result of differences in
the underlying stellar population between the two galaxies. We propose that the
younger population seen in the LMC compared with M31's bulge (where most of the
novae are found) produces progenitor binaries with higher average white dwarf
masses. The higher mean white dwarf mass not only produces a larger fraction of
fast, He/N novae compared with M31, but also results in a relatively large
recurrent nova population.


title:
Temperature measurements of fusion plasmas produced by petawatt
  laser-irradiated D2-3He or CD4-3He clustering gases

abstract:
  Two different methods have been employed to determine the plasma temperature
in a laser-cluster fusion experiment on the Texas Petawatt laser. In the first,
the temperature was derived from time-of-flight data of deuterium ions ejected
from exploding D2 or CD4 clusters. In the second, the temperature was measured
from the ratio of the rates of two different nuclear fusion reactions occurring
in the plasma at the same time: D(d, 3He)n and 3He(d, p)4He. The temperatures
determined by these two methods agree well, which indicates that: i) The ion
energy distribution is not significantly distorted when ions travel in the
disassembling plasma; ii) The kinetic energy of deuterium ions, especially the
hottest part responsible for nuclear fusion, is well described by a
near-Maxwellian distribution.


title: New view on the diffraction discovered by Grimaldi and Gaussian beams

abstract:
  In offered work short historical excursus to the classical theory of light is
presented: Grimaldi, Fermat, Newton, Huygens, Young, Fresnel, Fraunhofer, and
Gauss. The ray analog of wave model of light and Huygens-Fresnel's elementary
waves on the basis of consideration of geometrical model is offered. New
geometrical properties of Gaussian beams are analyzed. The new, generalized
interpretation of a corner of diffraction divergence of beams of light is
given. Difference of geometrical properties of wave fronts of infinite and
finite length is shown. Examples of possible application of our geometrical
model in various areas are given.


title: Super-resolution via superset selection and pruning

abstract:
  We present a pursuit-like algorithm that we call the "superset method" for
recovery of sparse vectors from consecutive Fourier measurements in the
super-resolution regime. The algorithm has a subspace identification step that
hinges on the translation invariance of the Fourier transform, followed by a
removal step to estimate the solution's support. The superset method is always
successful in the noiseless regime (unlike L1-minimization) and generalizes to
higher dimensions (unlike the matrix pencil method). Relative robustness to
noise is demonstrated numerically.


title:
An Input-Output Construction of Finite State $\rho/\mu$ Approximations
  for Control Design

abstract:
  We consider discrete-time plants that interact with their controllers via
fixed discrete alphabets. For this class of systems, and in the absence of
exogenous inputs, we propose a general, conceptual procedure for constructing a
sequence of finite state approximate models starting from finite length
sequences of input and output signal pairs. We explicitly derive conditions
under which the proposed construct, used in conjunction with a particular
generalized structure, satisfies desirable properties of $\rho/\mu$
approximations thereby leading to nominal deterministic finite state machine
models that can be used in certified-by- design controller synthesis. We also
show that the cardinality of the minimal disturbance alphabet that can be used
in this setting equals that of the sensor output alphabet. Finally, we show
that the proposed construct satisfies a relevant semi-completeness property.


title: Stacks of group representations

abstract:
  We start with a small paradigm shift about group representations, namely the
observation that restriction to a subgroup can be understood as an
extension-of-scalars. We deduce that, given a group $G$, the derived and the
stable categories of representations of a subgroup $H$ can be constructed out
of the corresponding category for $G$ by a purely triangulated-categorical
construction, analogous to \'etale extension in algebraic geometry.
  In the case of finite groups, we then use descent methods to investigate when
modular representations of the subgroup $H$ can be extended to $G$. We show
that the presheaves of plain, derived and stable representations all form
stacks on the category of finite $G$-sets (or the orbit category of $G$), with
respect to a suitable Grothendieck topology that we call the sipp topology.
  When $H$ contains a Sylow subgroup of $G$, we use sipp Cech cohomology to
describe the kernel and the image of the homomorphism $T(G)\to T(H)$, where
$T(-)$ denotes the group of endotrivial representations.


title: Cohomologies and Deformations of Generalized Left-symmetric Algebras

abstract:
  The purpose of this paper is to develop a cohomology and deformation theories
for generalized left-symmetric algebras.We introduce the notions of generalized
left-symmetric cohomology and deformation. We also generalize a theorem of
Dzhumadil'daev on connections between the right-symmetric cohomology and
Chevalley-Eilenberg cohomology. As an application, we obtain a factorization
theorem in left-symmetric superalgebras cohomology. Finally, we obtain all
complex simple left-symmetric superalgebras of dimension 3 by the infinitesimal
deformations of a given left-symmetric superalgebras.


title: An Iterative Noncoherent Relay Receiver for the Two-way Relay Channel

abstract:
  Physical-layer network coding improves the throughput of the two-way relay
channel by allowing multiple source terminals to transmit simultaneously to the
relay. However, it is generally not feasible to align the phases of the
multiple received signals at the relay, which motivates the exploration of
noncoherent solutions. In this paper, turbo-coded orthogonal multi-tone
frequency-shift keying (FSK) is considered for the two-way relay channel. In
contrast with analog network coding, the system considered is an instance of
digital network coding; i.e., the relay decodes the network codeword and
forwards a re-encoded version. Crucial to noncoherent digital network coding is
the implementation of the relay receiver, which is the primary focus of the
paper. The relay receiver derived in this paper supports any modulation order
that is a power of two, and features the iterative feedback of a priori
information from the turbo channel decoder to the demodulator; i.e., it uses
bit interleaved coded modulation with iterative decoding (BICM-ID). The
performance of the receiver is investigated in Rayeligh fading channels through
error-rate simulations and a capacity analysis. Results show that the BICM-ID
receiver improves energy efficiency by 0.5-0.9 dB compared to a non-iterative
receiver implementation.


title: Gepner type stability conditions on graded matrix factorizations

abstract:
  We introduce the notion of Gepner type Bridgeland stability conditions on
triangulated categories, which depends on a choice of an autoequivalence and a
complex number. We conjecture the existence of Gepner type stability conditions
on the triangulated categories of graded matrix factorizations of weighted
homogeneous polynomials. Such a stability condition may give a natural
stability condition for Landau-Ginzburg B-branes, and correspond to the Gepner
point of the stringy Kahler moduli space of a quintic 3-fold. The main result
is to show our conjecture when the variety defined by the weighted homogeneous
polynomial is a complete intersection of hyperplanes in a Calabi-Yau manifold
with dimension less than or equal to two.


title:
Diversity dynamics in Nymphalidae butterflies: Effect of phylogenetic
  uncertainty on diversification rate shift estimates

abstract:
  The family Nymphalidae is the largest family within the true butterflies and
has been used to develop hypotheses explaining evolutionary interactions
between plants and insects. Theories of insect and hostplant dynamics predict
accelerated diversification in some scenarios. We investigated whether
phylogenetic uncertainty affects a commonly used method (MEDUSA, modelling
evolutionary diversity using stepwise AIC) for estimating shifts in
diversification rates in lineages of the family Nymphalidae, by extending the
method to run across a random sample of phylogenetic trees from the posterior
distribution of a Bayesian run. We found that phylogenetic uncertainty greatly
affects diversification rate estimates. Different trees from the posterior
distribution can give diversification rates ranging from high values to almost
zero for the same clade, and for some clades both significant rate increase and
decrease were estimated. Only three out of 13 significant shifts found on the
maximum credibility tree were consistent across more than 95% of the trees from
the posterior: (i) accelerated diversification for Solanaceae feeders in the
tribe Ithomiini; (ii) accelerated diversification in the genus Charaxes, and
(iii) deceleration in the Danaina. By using the binary speciation and
extinction model (BISSE), we found that a hostplant shift to Solanaceae or a
codistributed character is responsible for the increase in diversification rate
in Ithomiini, and the result is congruent with the diffuse cospeciation
hypothesis. A shift to Apocynaceae is not responsible for the slowdown of
diversification in Danaina. Our results show that taking phylogenetic
uncertainty into account when estimating diversification rate shifts is of
great importance, and relying on the maximum credibility tree alone potentially
can give erroneous results.


title: Spectral analysis of the truncated Hilbert transform with overlap

abstract:
  We study a restriction of the Hilbert transform as an operator $H_T$ from
$L^2(a_2,a_4)$ to $L^2(a_1,a_3)$ for real numbers $a_1 < a_2 < a_3 < a_4$. The
operator $H_T$ arises in tomographic reconstruction from limited data, more
precisely in the method of differentiated back-projection (DBP). There, the
reconstruction requires recovering a family of one-dimensional functions $f$
supported on compact intervals $[a_2,a_4]$ from its Hilbert transform measured
on intervals $[a_1,a_3]$ that might only overlap, but not cover $[a_2,a_4]$. We
show that the inversion of $H_T$ is ill-posed, which is why we investigate the
spectral properties of $H_T$.
  We relate the operator $H_T$ to a self-adjoint two-interval Sturm-Liouville
problem, for which we prove that the spectrum is discrete. The Sturm-Liouville
operator is found to commute with $H_T$, which then implies that the spectrum
of $H_T^* H_T$ is discrete. Furthermore, we express the singular value
decomposition of $H_T$ in terms of the solutions to the Sturm-Liouville
problem. The singular values of $H_T$ accumulate at both $0$ and $1$, implying
that $H_T$ is not a compact operator. We conclude by illustrating the
properties obtained for $H_T$ numerically.


title:
The binary merger channel for the progenitor of the fastest rotating
  O-type star VFTS102

abstract:
  VFTS102 has a projected rotational velocity ($>$500\,km s$^{-1}$) and would
appear to be the fastest rotating O-type star. We show that its high rotational
velocity could be understood within the framework of the binary merger. In the
binary merger channel, the progenitor binary of VFTS102 would evolve into
contact while two components are still on the main sequence, and then merge
into a rapidly rotating single star. Employing Eggleton's stellar evolution
code, we performed binary stellar evolution calculations and mapped out the
initial parameters of the progenitor of VFTS102 in the orbital period-mass
ratio ($P-q$) plane. We found that the progenitor binary of VFTS102 with
initial mass ratio $q_0 \la 0.7$ should have an initial orbital period shorter
than $3.76-4.25$\,days, while above this mass ratio it should have an initial
orbital period shorter than $1.44-1.55$\,days. The progenitor of VFTS102 would
evolve into contact during the rapid mass transfer phase or during the
subsequent slow mass transfer phase, and might ultimately merge into a rapidly
rotating massive star. In addition, we performed Monte Carlo simulations to
investigate the binary merger channel. We estimated the fraction of binaries
that would merge into single stars and the fraction of single stars that might
be produced from the binary merger channel. It is found that about 8.7% of
binaries would evolve into contact and merge into rapidly rotating single
stars, and about 17.1% of single stars might be produced from the binary merger
channel and should have similar properties to VFTS102. This suggests that the
binary merger channel might be one of the main channels for the formation of
rapidly rotating massive stars like VFTS102.


title:
Massive disk formation in the tidal disruption of a neutron star by a
  nearly extremal black hole

abstract:
  Black hole-neutron star (BHNS) binaries are important sources of
gravitational waves for second-generation interferometers, and BHNS mergers are
also a proposed engine for short, hard gamma-ray bursts. The behavior of both
the spacetime (and thus the emitted gravitational waves) and the neutron star
matter in a BHNS merger depend strongly and nonlinearly on the black hole's
spin. While there is a significant possibility that astrophysical black holes
could have spins that are nearly extremal (i.e. near the theoretical maximum),
to date fully relativistic simulations of BHNS binaries have included
black-hole spins only up to $S/M^2$=0.9, which corresponds to the black hole
having approximately half as much rotational energy as possible, given the
black hole's mass. In this paper, we present a new simulation of a BHNS binary
with a mass ratio $q=3$ and black-hole spin $S/M^2$=0.97, the highest simulated
to date. We find that the black hole's large spin leads to the most massive
accretion disk and the largest tidal tail outflow of any fully relativistic
BHNS simulations to date, even exceeding the results implied by extrapolating
results from simulations with lower black-hole spin. The disk appears to be
remarkably stable. We also find that the high black-hole spin persists until
shortly before the time of merger; afterwards, both merger and accretion spin
down the black hole.


title:
A Common Structure in PBW Bases of the Nilpotent Subalgebra of
  $U_q(\mathfrak{g})$ and Quantized Algebra of Functions

abstract:
  For a finite-dimensional simple Lie algebra $\mathfrak{g}$, let
$U^+_q(\mathfrak{g})$ be the positive part of the quantized universal
enveloping algebra, and $A_q(\mathfrak{g})$ be the quantized algebra of
functions. We show that the transition matrix of the PBW bases of
$U^+_q(\mathfrak{g})$ coincides with the intertwiner between the irreducible
$A_q(\mathfrak{g})$-modules labeled by two different reduced expressions of the
longest element of the Weyl group of $\mathfrak{g}$. This generalizes the
earlier result by Sergeev on $A_2$ related to the tetrahedron equation and
endows a new representation theoretical interpretation with the recent solution
to the 3D reflection equation for $C_2$. Our proof is based on a realization of
$U^+_q(\mathfrak{g})$ in a quotient ring of $A_q(\mathfrak{g})$.


title:
A possible link among pulsar timing noise intermittency and hidden
  ultra-compact binaries

abstract:
  The quasi-periodic feature of 1-10 years exhibited in pulsar timing noise has
not been well understood since 1980. The recently demonstrated correlation
between timing noise and variation of pulse profile motivates us to further
investigate its origins. We suggest that the quasi-periodicity feature of
timing noise, with rapid oscillations lying on lower frequency structure, comes
from the geodetic precession of an unseen binary system, which induces
additional motion of the pulsar spin axis. The resultant change of azimuth and
latitude at which the observer's line of sight crosses the emission beam is
responsible for the variation of timing noise and pulse profile respectively.
The first numerical simulation to both timing noise and pulse profile variation
are thus performed, from which the orbital periods of these pulsars are of 1-35
minutes. Considering the existence of the ultracompact binary white dwarf of
orbital period of 5.4 minute, HM Cancri, such orbital periods to pulsar
binaries are not strange. The change of latitude of the magnetic moment
exceeding the range of emission beam of a pulsar results in the intermittency,
which explains the behavior of PSR B1931+24. Therefore, it provides not only a
mechanism of the quasi-periodic feature displayed on some ``singular" pulsars,
like timing noise, variation of pulse profile and intermittency; but also a new
approach of searching ultra-compact binaries, possibly pulsar-black hole binary
systems.


title: Octet Spin Fractions and the Proton Spin Problem

abstract:
  The relatively small fraction of the spin of the proton carried by its quarks
presents a major challenge to our understanding of the strong interaction.
Traditional efforts to explore this problem have involved new and imaginative
experiments and QCD based studies of the nucleon. We propose a new approach to
the problem which exploits recent advances in lattice QCD. In particular, we
extract values for the spin carried by the quarks in other members of the
baryon octet in order to see whether the suppression observed for the proton is
a general property or depends significantly on the baryon structure. We compare
these results with the values for the spin fractions calculated within a model
that includes the effects of confinement, relativity, gluon exchange currents
and the meson cloud required by chiral symmetry, finding a very satisfactory
level of agreement given the precision currently attainable.


title: Modelling Fast-Alfv\'en Mode Conversion Using SPARC

abstract:
  We successfully utilise the SPARC code to model fast-Alfv\'en mode conversion
in the region $c_A \gg c_S$ via 3-D MHD numerical simulations of helioseismic
waves within constant inclined magnetic field configurations. This was achieved
only after empirically modifying the background density and gravitational
stratifications in the upper layers of our computational box, as opposed to
imposing a traditional Lorentz Force limiter, to ensure a manageable timestep.
We found that the latter approach inhibits the fast-Alfv\'en mode conversion
process by severely damping the magnetic flux above the surface.


title: Further Studies of Higgs Properties at An ILC $\gamma\gamma$ Collider

abstract:
  Recently the ATLAS and CMS experiments at the LHC have found a Higgs like
boson $h$ with a mass around 125 GeV from several decay modes. The decay mode
$h \to \gamma\gamma$ is one of the most important modes in studying whether $h$
is actually the standard model (SM) Higgs boson. Current data indicate that
$h\to \gamma\gamma$ has a branching ratio larger than the SM prediction for $h$
being identified as the SM Higgs boson. To decide whether the $h$ discovered at
the LHC is the SM Higgs boson, more data are needed. We study how
$\gamma\gamma$ collider can help to provide some of the most important
information about the Higgs boson properties. We show that a $\gamma\gamma$
collider can easily verify whether the enhanced $h \to \gamma\gamma$ observed
at the LHC hold. Different models can be tested by studying Higgs boson decay
to $\gamma Z$. Studying angular distribution of the $\gamma \gamma$ through
on-shell production of $h$ and its subsequent decays into a $\gamma \gamma$
pair can decide whether the Higgs like boson $h$ at the LHC is a spin-0 or a
spin-2 boson.


title:
Dynamic Implicit 3D Adaptive Mesh Refinement for Non-Equilibrium
  Radiation Diffusion

abstract:
  The time dependent non-equilibrium radiation diffusion equations are
important for solving the transport of energy through radiation in optically
thick regimes and find applications in several fields including astrophysics
and inertial confinement fusion. The associated initial boundary value problems
that are encountered often exhibit a wide range of scales in space and time and
are extremely challenging to solve. To efficiently and accurately simulate
these systems we describe our research on combining techniques that will also
find use more broadly for long term time integration of nonlinear multiphysics
systems: implicit time integration for efficient long term time integration of
stiff multiphysics systems, local control theory based step size control to
minimize the required global number of time steps while controlling accuracy,
dynamic 3D adaptive mesh refinement (AMR) to minimize memory and computational
costs, Jacobian Free Newton-Krylov methods on AMR grids for efficient nonlinear
solution, and optimal multilevel preconditioner components that provide level
independent solver convergence.


title:
Evidence for a $\nu=5/2$ Fractional Quantum Hall Nematic State in
  Parallel Magnetic Fields

abstract:
  We report magneto-transport measurements for the fractional quantum Hall
state at filling factor $\nu=$ 5/2 as a function of applied parallel magnetic
field ($B_{||}$). As $B_{||}$ is increased, the 5/2 state becomes increasingly
anisotropic, with the in-plane resistance along the direction of $B_{||}$
becoming more than 30 times larger than in the perpendicular direction.
Remarkably, the resistance anisotropy ratio remains constant over a relatively
large temperature range, yielding an energy gap which is the same for both
directions. Our data are qualitatively consistent with a fractional quantum
Hall \textit{nematic} phase.


title:
Random Matrix Theory and Cross-correlations in Global Financial Indices
  and Local Stock Market Indices

abstract:
  We analyzed cross-correlations between price fluctuations of global financial
indices (20 daily stock indices over the world) and local indices (daily
indices of 200 companies in the Korean stock market) by using random matrix
theory (RMT). We compared eigenvalues and components of the largest and the
second largest eigenvectors of the cross-correlation matrix before, during, and
after the global financial the crisis in the year 2008. We find that the
majority of its eigenvalues fall within the RMT bounds [{\lambda}_,
{\lambda}+], where {\lambda}_- and {\lambda}_+ are the lower and the upper
bounds of the eigenvalues of random correlation matrices. The components of the
eigenvectors for the largest positive eigenvalues indicate the identical
financial market mode dominating the global and local indices. On the other
hand, the components of the eigenvector corresponding to the second largest
eigenvalue are positive and negative values alternatively. The components
before the crisis change sign during the crisis, and those during the crisis
change sign after the crisis. The largest inverse participation ratio (IPR)
corresponding to the smallest eigenvector is higher after the crisis than
during any other periods in the global and local indices. During the global
financial the crisis, the correlations among the global indices and among the
local stock indices are perturbed significantly. However, the correlations
between indices quickly recover the trends before the crisis.


title: Coalescence of Pickering emulsion droplets induced by an electric field

abstract:
  Combining high-speed photography with electric current measurement, we
investigate the electrocoalescence of Pickering emulsion droplets. Under high
enough electric field, the originally-stable droplets coalesce via two distinct
approaches: normal coalescence and abnormal coalescence. In the normal
coalescence, a liquid bridge grows continuously and merges two droplets
together, similar to the classical picture. In the abnormal coalescence,
however, the bridge fails to grow indefinitely; instead it breaks up
spontaneously due to the geometric constraint from particle shells. Such
connecting-then-breaking cycles repeat multiple times, until a stable
connection is established. In depth analysis indicates that the defect size in
particle shells determines the exact merging behaviors: when the defect size is
larger than a critical size around the particle diameter, normal coalescence
will show up; while abnormal coalescence will appear for coatings with smaller
defects.


title: Current partition at topological zero-line intersections

abstract:
  An intersection between one-dimensional chiral acts as a topological current
splitter. We find that the splitting of a chiral zero-line mode obeys very
simple, yet highly counterintuitive, partition laws which relate current paths
to the geometry of the intersection. Our results have far reaching implications
for device proposals based on chiral zero-line transport in the design of
electron beam splitters and interferometers, and for understanding transport
properties in systems where multiple topological domains lead to a statistical
network of chiral channels.


title: A material system for reliable low voltage anodic electrowetting

abstract:
  Electrowetting on dielectric is demonstrated with a thin spin-coated
fluoropolymer over an aluminum electrode. Previous efforts to use thin
spin-coated dielectric layers for electrowetting have shown limited success due
to defects in the layers. However, when used with a citric acid electrolyte and
anodic voltages, repeatable droplet actuation is achieved for 5000 cycles with
an actuation of just 10 V. This offers the potential for low voltage
electrowetting systems that can be manufactured with a simple low-cost process.


title: Reciprocal versus Parasocial Relationships in Online Social Networks

abstract:
  Many online social networks are fundamentally directed, i.e., they consist of
both reciprocal edges (i.e., edges that have already been linked back) and
parasocial edges (i.e., edges that haven't been linked back). Thus,
understanding the structures and evolutions of reciprocal edges and parasocial
ones, exploring the factors that influence parasocial edges to become
reciprocal ones, and predicting whether a parasocial edge will turn into a
reciprocal one are basic research problems.
  However, there have been few systematic studies about such problems. In this
paper, we bridge this gap using a novel large-scale Google+ dataset crawled by
ourselves as well as one publicly available social network dataset. First, we
compare the structures and evolutions of reciprocal edges and those of
parasocial edges. For instance, we find that reciprocal edges are more likely
to connect users with similar degrees while parasocial edges are more likely to
link ordinary users (e.g., users with low degrees) and popular users (e.g.,
celebrities). However, the impacts of reciprocal edges linking ordinary and
popular users on the network structures increase slowly as the social networks
evolve. Second, we observe that factors including user behaviors, node
attributes, and edge attributes all have significant impacts on the formation
of reciprocal edges. Third, in contrast to previous studies that treat
reciprocal edge prediction as either a supervised or a semi-supervised learning
problem, we identify that reciprocal edge prediction is better modeled as an
outlier detection problem. Finally, we perform extensive evaluations with the
two datasets, and we show that our proposal outperforms previous reciprocal
edge prediction approaches.


title:
Estimating Sectoral Pollution Load in Lagos, Nigeria Using Data Mining
  Techniques

abstract:
  Industrial pollution is often considered to be one of the prime factors
contributing to air, water and soil pollution. Sectoral pollution loads
(ton/yr) into different media (i.e. air, water and land) in Lagos were
estimated using Industrial Pollution Projected System (IPPS). These were
further studied using Artificial neural Networks (ANNs), a data mining
technique that has the ability of detecting and describing patterns in large
data sets with variables that are non- linearly related. Time Lagged Recurrent
Network (TLRN) appeared as the best Neural Network model among all the neural
networks considered which includes Multilayer Perceptron (MLP) Network,
Generalized Feed Forward Neural Network (GFNN), Radial Basis Function (RBF)
Network and Recurrent Network (RN). TLRN modelled the data-sets better than the
others in terms of the mean average error (MAE) (0.14), time (39 s) and linear
correlation coefficient (0.84). The results showed that Artificial Neural
Networks (ANNs) technique (i.e., Time Lagged Recurrent Network) is also
applicable and effective in environmental assessment study. Keywords:
Artificial Neural Networks (ANNs), Data Mining Techniques, Industrial Pollution
Projection System (IPPS), Pollution load, Pollution Intensity.


title:
Relativistic dissipative hydrodynamics from kinetic theory with
  relaxation time approximation

abstract:
  Starting from Boltzmann equation with relaxation time approximation for the
collision term and using Chapman-Enskog like expansion for distribution
function close to equilibrium, we derive hydrodynamic evolution equations for
the dissipative quantities directly from their definition. Although the form of
the equations is identical to those obtained in traditional Israel-Stewart
approaches employing Grad's 14-moment approximation and second moment of
Boltzmann equation, the coefficients obtained are different. In the case of
one-dimensional scaling expansion, we demonstrate that our results are in
better agreement with numerical solution of Boltzmann equation as compared to
Israel-Stewart results. We also show that including approximate higher-order
corrections in viscous evolution significantly improves this agreement, thus
justifying the relaxation time approximation for the collision term.


title:
Cloud Forensics: A Meta-Study of Challenges, Approaches, and Open
  Problems

abstract:
  In recent years, cloud computing has become popular as a cost-effective and
efficient computing paradigm. Unfortunately, today's cloud computing
architectures are not designed for security and forensics. To date, very little
research has been done to develop the theory and practice of cloud forensics.
Many factors complicate forensic investigations in a cloud environment. First,
the storage system is no longer local. Therefore, even with a subpoena, law
enforcement agents cannot confiscate the suspect's computer and get access to
the suspect's files. Second, each cloud server contains files from many users.
Hence, it is not feasible to seize servers from a data center without violating
the privacy of many other users. Third, even if the data belonging to a
particular suspect is identified, separating it from other users' data is
difficult. Moreover, other than the cloud provider's word, there is usually no
evidence that links a given data file to a particular suspect. For such
challenges, clouds cannot be used to store healthcare, business, or national
security related data, which require audit and regulatory compliance. In this
paper, we systematically examine the cloud forensics problem and explore the
challenges and issues in cloud forensics. We then discuss existing research
projects and finally, we highlight the open problems and future directions in
cloud forensics research area. We posit that our systematic approach towards
understanding the nature and challenges of cloud forensics will allow us to
examine possible secure solution approaches, leading to increased trust on and
adoption of cloud computing, especially in business, healthcare, and national
security. This in turn will lead to lower cost and long-term benefit to our
society as a whole.


title: SU(5/3) Superalgebra and Its Representations of Fundamental Particles

abstract:
  We study the lowest dimensional typical and atypical representations of
SU(5/3) superalgebra as a possible unified gauge theory having a natural SU(5)
subalgebra with SU(3) extra structure, which will be used to accommodate three
generations of fundamental particles. By using Kac-Dynkin weight techniques, we
find that all known quarks and leptons can be really accommodated in one
atypical irreducible representation of SU(5/3).


title:
S wave superconductivity in newly discovered superconductor
  BaTi$_2$Sb$_2$O revealed by $^{121/123}$Sb-NMR/Nuclear Quadrupole Resonance
  measurements

abstract:
  We report the $^{121/123}$Sb-NMR/nuclear quadrupole resonance (NQR)
measurements on the newly-discovered superconductor BaTi$_2$Sb$_2$O with a
two-dimensional Ti$_2$O square-net layer formed with Ti$^{3+}$ (3$d^1$). NQR
measurements revealed that the in-plane four-fold symmetry is broken at the Sb
site below $T_{\rm A} \sim$ 40 K, without an internal field appearing at the Sb
site. These exclude a spin-density wave (SDW)/ charge density wave (CDW)
ordering with incommensurate correlations, but can be understood with the
commensurate CDW ordering at $T_{\rm A}$. The spin-lattice relaxation rate
$1/T_1$, measured at the four-fold symmetry breaking site, decreases below
superconducting (SC) transition temperature $T_{\rm c}$, indicative of the
microscopic coexistence of superconductivity and the CDW/SDW phase below
$T_{\rm A}$. Furthermore, $1/T_1$ of $^{121}$Sb-NQR shows a coherence peak just
below $T_{\rm c}$ and decreases exponentially at low temperatures. These
results are in sharp contrast with those in cuprate and iron-based
superconductors, and strongly suggest that its SC symmetry is classified to an
ordinary s-wave state.


title: Rate-Distortion Bounds for an Epsilon-Insensitive Distortion Measure

abstract:
  Direct evaluation of the rate-distortion function has rarely been achieved
when it is strictly greater than its Shannon lower bound. In this paper, we
consider the rate-distortion function for the distortion measure defined by an
epsilon-insensitive loss function. We first present the Shannon lower bound
applicable to any source distribution with finite differential entropy. Then,
focusing on the Laplacian and Gaussian sources, we prove that the
rate-distortion functions of these sources are strictly greater than their
Shannon lower bounds and obtain analytically evaluable upper bounds for the
rate-distortion functions. Small distortion limit and numerical evaluation of
the bounds suggest that the Shannon lower bound provides a good approximation
to the rate-distortion function for the epsilon-insensitive distortion measure.


title:
A phenomenological approach to the equation of state of a unitary Fermi
  gas

abstract:
  We propose a phenomenological approach for the equation of state of a unitary
Fermi gas. The universal equation of state is parametrised in terms of
Fermi-Dirac integrals. This reproduces the experimental data over the
accessible range of fugacity and normalised temperature, but cannot describe
the superfluid phase transition found in the MIT experiment \cite{ku}. The most
sensitive data for compressibility and specific heat at phase transition can,
however, befitted by introducing into the grand partition function a pair of
complex conjugate zeros lying in the complex fugacity plane slightly off the
real axis.


title: Scale invariance and superfluid turbulence

abstract:
  We construct a Schroedinger field theory invariant under local spatial
scaling. It is shown to provide an effective theory of superfluid turbulence by
deriving, analytically, the observed Kolmogorov 5/3 law and to lead to a
Biot-Savart interaction between the observed filament excitations of the system
as well.


title: The 15N-enrichment in dark clouds and Solar System objects

abstract:
  The line intensities of the fundamental rotational transitions of H13CN and
HC15N were observed towards two prestellar cores, L183 and L1544, and lead to
molecular isotopic ratios 140 6 14N/15N 6 250 and 140 6 14N/15N 6 360,
respectively. The range of values reflect genuine spatial variations within the
cores. A comprehensive analysis of the available measurements of the nitrogen
isotopic ratio in prestellar cores show that molecules carrying the nitrile
functional group appear to be systematically 15N-enriched com- pared to those
carrying the amine functional group. A chemical origin for the differential
15N-enhance- ment between nitrile- and amine-bearing interstellar molecules is
proposed. This sheds new light on several observations of Solar System objects:
(i) the similar N isotopic fractionation in Jupiter's NH3 and solar wind N+;
(ii) the 15N-enrichments in cometary HCN and CN (that might represent a direct
inter- stellar inheritance); and (iii) 15N-enrichments observed in organics in
primitive cosmomaterials. The large variations in the isotopic composition of
N-bearing molecules in Solar System objects might then simply reflect the
different interstellar N reservoirs from which they are originating.


title: Normal surface singularities admitting contracting automorphisms

abstract:
  We show that a complex normal surface singularity admitting a contracting
automorphism is necessarily quasihomogeneous. We also describe the geometry of
a compact complex surface arising as the orbit space of such a contracting
automorphism.


title: Bayes Factor Consistency for One-way Random Effects Model

abstract:
  In this paper, we consider Bayesian hypothesis testing for the balanced
one-way random effects model. A special choice of the prior formulation for the
ratio of variance components is shown to yield an explicit closed-form Bayes
factor without integral representation. Furthermore, we study the consistency
issue of the resulting Bayes factor under three asymptotic scenarios: either
the number of units goes to infinity, the number of observations per unit goes
to infinity, or both go to infinity. Finally, the behavior of the proposed
approach is illustrated by simulation studies.


title:
Thermal hysteresis of spin reorientation at Morin transition in alkoxide
  derived hematite nanoparticles

abstract:
  We present results on structural and magnetic properties of highly
crystalline alpha-Fe2O3 nanoparticles of average size ~200 nm, synthesized from
a novel sol-gel method using metal alkoxide precursor. These particles are
multi-domain, showing the weak ferromagnetic-antiferromagnetic (WF-AF)
transition (i.e., the Morin transition) at T_M = 256(2) K. M\"ossbauer
measurements revealed a jump in hyperfine parameters at T ~ T_M, which also
displays thermal hysteresis upon cooling or heating the sample. The analysis of
hyperfine parameters as a function of temperature allowed us to discard
temperature gradients as well as the coexistence of WF/AF phases as possible
origins of this hysteretic behaviour. Instead, the hysteresis can be
qualitatively explained by the small size and high-crystallinity of the
particles, which hinder the nucleation of the WF or AF phases yielding
metastable states beyond TM.


title: An Augmented Lagrangian Method for Conic Convex Programming

abstract:
  We propose a new first-order augmented Lagrangian algorithm ALCC for solving
convex conic programs of the form min{rho(x)+gamma(x): Ax-b in K, x in chi},
where rho and gamma are closed convex functions, and gamma has a Lipschitz
continuous gradient, A is mxn real matrix, K is a closed convex cone, and chi
is a "simple" convex compact set such that optimization problems of the form
min{rho(x)+|x-x0|_2^2: x in chi} can be efficiently solved for any given x0. We
show that any limit point of the primal ALCC iterates is an optimal solution of
the conic convex problem, and the dual ALCC iterates have a unique limit point
that is a Karush-Kuhn-Tucker (KKT) point of the conic program. We also show
that for any epsilon>0, the primal ALCC iterates are epsilon-feasible and
epsilon optimal after O(log(1/epsilon)) iterations which require solving
O(1/epsilon log(1/epsilon)) problems of the form min{rho(x)+|x-x0|_2^2: x in
chi}.


title:
Coexistence between fluid and crystalline phases of proteins in
  photosynthetic membranes

abstract:
  Photosystem II (PSII) and its associated light-harvesting complex II (LHCII)
are highly concentrated in the stacked grana regions of photosynthetic
thylakoid membranes. Within the membrane, PSII-LHCII supercomplexes can be
arranged in disordered packings, ordered arrays, or mixtures thereof. The
physical driving forces underlying array formation are unknown, complicating
attempts to determine a possible functional role for arrays in regulating light
harvesting or energy conversion efficiency. Here we introduce a coarse-grained
model of protein interactions in coupled photosynthetic membranes, focusing on
just two particle types that feature simple shapes and potential energies
motivated by structural studies. Reporting on computer simulations of the
model's equilibrium fluctuations, we demonstrate its success in reproducing
diverse structural features observed in experiments, including extended
PSII-LHCII arrays. Free energy calculations reveal that the appearance of
arrays marks a phase transition from the disordered fluid state to a
system-spanning crystal, which can easily be arrested by thermodynamic
constraints or slow dynamics. The region of fluid-crystal coexistence is broad,
encompassing much of the physiologically relevant parameter regime. Our results
suggest that grana membranes lie at or near phase coexistence, conferring
significant structural and functional flexibility to this densely packed
membrane protein system.


title: Network traffic prediction based on ARFIMA model

abstract:
  ARFIMA is a time series forecasting model, which is an improved ARMA model,
the ARFIMA model proposed in this article is demonstrated and deduced in
detail. combined with network traffic of CERNET backbone and the ARFIMA
model,the result shows that,compare to the ARMA model, the prediction
efficiency and accuracy has increased significantly, and not susceptible to
sampling.


title: A Note on "A polynomial-time algorithm for global value numbering"

abstract:
  Global Value Numbering(GVN) is a popular method for detecting redundant
computations. A polynomial time algorithm for GVN is presented by Gulwani and
Necula(2006). Here we present two limitations of this GVN algorithm due to
which detection of certain kinds of redundancies can not be done using this
algorithm. The first one is concerning the use of this algorithm in detecting
some instances of the classical global common subexpressions, and the second is
concerning its use in the detection of some redundancies that a local value
numbering algorithm will detect. We suggest improvements that enable the
algorithm to detect these kinds of redundancies as well.


title:
Moment-based cosh-Hilbert Inversion and Its Applications in
  Single-photon Emission Computed Tomography

abstract:
  The inversion of cosh-Hilbert transform (CHT) is one of the most crucial
steps for single-photon emission computed tomography with uniform attenuation
from truncated projection data. Although the uniqueness of the CHT inversion
had been proved \cite{Noo2007}, there is no exact and analytic inverse formula
so far. Several approximated inversion algorithms of the CHT had been developed
\cite{Noo2007}\cite{You2007}. In this paper, we proposed a new numerical
moment-based inversion algorithm.


title: R-M interactions in R2BaMO5 (R=Y or Gd and M=Cu or Zn)

abstract:
  R2BaMO5 (R = Gd, Y and M = Cu, Zn) oxides have been studied by specific heat,
dc magnetic susceptibility, and electron paramagnetic resonance (EPR). For one
member of the series without magnetic moment at M, namely Gd2BaZnO5,
measurements reveal long range antiferromagnetic order at TN(Gd2BaZnO5) =
2.3(0.1)K, much lower than the Curie Weiss temperature of {\Theta}=15.9(0.3)K.
This indicates the existence of competing interactions that introduce a large
degree of magnetic frustration in the system. For Y2BaCuO5 the Cu Cu
interactions are responsible for the broad maximum in the magnetic contribution
to the specific heat centered at 18.5(0.01)K that stretches beyond the
instrumental limit of 25K. The strong Cu Cu interactions also present in
Gd2BaCuO5, combined with the Gd-Cu interaction, polarize the Gd sublattice
giving measurable contributions to the specific heat in the same temperature
range. In addition, they broaden the Gd EPR line and saturate its integrated
intensity. The ordering temperature of Gd ions is raised to
TN(Gd2BaCuO5)=12.0(0.1)K.


title: Variant-Frequency Semantics for Green Futures

abstract:
  This paper describes an operational semantics for futures, with the primary
target on energy efficiency. The work in progress is built around an insight
that different threads can coordinate by running at different "paces," so that
the time for synchronization and the resulting wasteful energy consumption can
be reduced. We exploit several inherent characteristics of futures to determine
how the paces of involving threads can be coordinated. The semantics is
inspired by recent advances in computer architectures, where the frequencies of
CPU cores can be adjusted dynamically. The work is a first-step toward a
direction where variant frequencies are directly modeled as an essential
semantic feature in concurrent programming languages.


title: Mapping the Join Calculus to Heterogeneous Hardware

abstract:
  As modern architectures introduce additional heterogeneity and parallelism,
we look for ways to deal with this that do not involve specialising software to
every platform. In this paper, we take the Join Calculus, an elegant model for
concurrent computation, and show how it can be mapped to an architecture by a
Cartesian-product-style construction, thereby making use of the calculus'
inherent non-determinism to encode placement choices. This unifies the concepts
of placement and scheduling into a single task.


title: An event-based model for contracts

abstract:
  We introduce a basic model for contracts. Our model extends event structures
with a new relation, which faithfully captures the circular dependencies among
contract clauses. We establish whether an agreement exists which respects all
the contracts at hand (i.e. all the dependencies can be resolved), and we
detect the obligations of each participant. The main technical contribution is
a correspondence between our model and a fragment of the contract logic PCL.
More precisely, we show that the reachable events are exactly those which
correspond to provable atoms in the logic. Despite of this strong
correspondence, our model improves previous work on PCL by exhibiting a
finer-grained notion of culpability, which takes into account the legitimate
orderings of events.


title: Merging Multiparty Protocols in Multiparty Choreographies

abstract:
  Choreography-based programming is a powerful paradigm for defining
communication-based systems from a global viewpoint. A choreography can be
checked against multiparty protocol specifications, given as behavioural types,
that may be instantiated indefinitely at runtime. Each protocol instance is
started with a synchronisation among the involved peers.
  We analyse a simple transformation from a choreography with a possibly
unbounded number of protocol instantiations to a choreography instantiating a
single protocol, which is the merge of the original ones. This gives an
effective methodology for obtaining new protocols by composing existing ones.
Moreover, by removing all synchronisations required for starting protocol
instances, our transformation reduces the number of communications and
resources needed to execute a choreography.


title: Typing Context-Dependent Behavioural Variation

abstract:
  Context Oriented Programming (COP) concerns the ability of programs to adapt
to changes in their running environment. A number of programming languages
endowed with COP constructs and features have been developed. However, some
foundational issues remain unclear. This paper proposes adopting static
analysis techniques to reason on and predict how programs adapt their
behaviour. We introduce a core functional language, ContextML, equipped with
COP primitives for manipulating contexts and for programming behavioural
variations. In particular, we specify the dispatching mechanism, used to select
the program fragments to be executed in the current active context. Besides the
dynamic semantics we present an annotated type system. It guarantees that the
well-typed programs adapt to any context, i.e. the dispatching mechanism always
succeeds at run-time.


title: Modularizing and Specifying Protocols among Threads

abstract:
  We identify three problems with current techniques for implementing protocols
among threads, which complicate and impair the scalability of multicore
software development: implementing synchronization, implementing coordination,
and modularizing protocols. To mend these deficiencies, we argue for the use of
domain-specific languages (DSL) based on existing models of concurrency. To
demonstrate the feasibility of this proposal, we explain how to use the model
of concurrency Reo as a high-level protocol DSL, which offers appropriate
abstractions and a natural separation of protocols and computations. We
describe a Reo-to-Java compiler and illustrate its use through examples.


title: Non-simplifying Graph Rewriting Termination

abstract:
  So far, a very large amount of work in Natural Language Processing (NLP) rely
on trees as the core mathematical structure to represent linguistic
informations (e.g. in Chomsky's work). However, some linguistic phenomena do
not cope properly with trees. In a former paper, we showed the benefit of
encoding linguistic structures by graphs and of using graph rewriting rules to
compute on those structures. Justified by some linguistic considerations, graph
rewriting is characterized by two features: first, there is no node creation
along computations and second, there are non-local edge modifications. Under
these hypotheses, we show that uniform termination is undecidable and that
non-uniform termination is decidable. We describe two termination techniques
based on weights and we give complexity bound on the derivation length for
these rewriting system.


title:
Convergence in Infinitary Term Graph Rewriting Systems is Simple
  (Extended Abstract)

abstract:
  In this extended abstract, we present a simple approach to convergence on
term graphs that allows us to unify term graph rewriting and infinitary term
rewriting. This approach is based on a partial order and a metric on term
graphs. These structures arise as straightforward generalisations of the
corresponding structures used in infinitary term rewriting. We compare our
simple approach to a more complicated approach that we developed earlier and
show that this new approach is superior in many ways. The only unfavourable
property that we were able to identify, viz. failure of full correspondence
between weak metric and partial order convergence, is rectified by adopting a
strong convergence discipline.


title:
Linear Compressed Pattern Matching for Polynomial Rewriting (Extended
  Abstract)

abstract:
  This paper is an extended abstract of an analysis of term rewriting where the
terms in the rewrite rules as well as the term to be rewritten are compressed
by a singleton tree grammar (STG). This form of compression is more general
than node sharing or representing terms as dags since also partial trees
(contexts) can be shared in the compression. In the first part efficient but
complex algorithms for detecting applicability of a rewrite rule under
STG-compression are constructed and analyzed. The second part applies these
results to term rewriting sequences.
  The main result for submatching is that finding a redex of a left-linear rule
can be performed in polynomial time under STG-compression.
  The main implications for rewriting and (single-position or parallel)
rewriting steps are: (i) under STG-compression, n rewriting steps can be
performed in nondeterministic polynomial time. (ii) under STG-compression and
for left-linear rewrite rules a sequence of n rewriting steps can be performed
in polynomial time, and (iii) for compressed rewrite rules where the left hand
sides are either DAG-compressed or ground and STG-compressed, and an
STG-compressed target term, n rewriting steps can be performed in polynomial
time.


title: Evaluating functions as processes

abstract:
  A famous result by Milner is that the lambda-calculus can be simulated inside
the pi-calculus. This simulation, however, holds only modulo strong
bisimilarity on processes, i.e. there is a slight mismatch between
beta-reduction and how it is simulated in the pi-calculus. The idea is that
evaluating a lambda-term in the pi-calculus is like running an
environment-based abstract machine, rather than applying ordinary
beta-reduction. In this paper we show that such an abstract-machine evaluation
corresponds to linear weak head reduction, a strategy arising from the
representation of lambda-terms as linear logic proof nets, and that the
relation between the two is as tight as it can be. The study is also smoothly
rephrased in the call-by-value case, introducing a call-by-value analogous of
linear weak head reduction.


title: Term Graph Representations for Cyclic Lambda-Terms

abstract:
  We study various representations for cyclic lambda-terms as higher-order or
as first-order term graphs. We focus on the relation between
'lambda-higher-order term graphs' (lambda-ho-term-graphs), which are
first-order term graphs endowed with a well-behaved scope function, and their
representations as 'lambda-term-graphs', which are plain first-order term
graphs with scope-delimiter vertices that meet certain scoping requirements.
Specifically we tackle the question: Which class of first-order term graphs
admits a faithful embedding of lambda-ho-term-graphs in the sense that (i) the
homomorphism-based sharing-order on lambda-ho-term-graphs is preserved and
reflected, and (ii) the image of the embedding corresponds closely to a natural
class (of lambda-term-graphs) that is closed under homomorphism?
  We systematically examine whether a number of classes of lambda-term-graphs
have this property, and we find a particular class of lambda-term-graphs that
satisfies this criterion. Term graphs of this class are built from application,
abstraction, variable, and scope-delimiter vertices, and have the
characteristic feature that the latter two kinds of vertices have back-links to
the corresponding abstraction.
  This result puts a handle on the concept of subterm sharing for higher-order
term graphs, both theoretically and algorithmically: We obtain an easily
implementable method for obtaining the maximally shared form of
lambda-ho-term-graphs. Furthermore, we open up the possibility to pull back
properties from first-order term graphs to lambda-ho-term-graphs, properties
such as the complete lattice structure of bisimulation equivalence classes with
respect to the sharing order.


title: Bigraphical Nets

abstract:
  Interaction nets are a graphical model of computation, which has been used to
define efficient evaluators for functional calculi, and specifically lambda
calculi with patterns. However, the flat structure of interaction nets forces
pattern matching and functional behaviour to be encoded at the same level,
losing some potential parallelism. In this paper, we introduce bigraphical
nets, or binets for short, as a generalisation of interaction nets using ideas
from bigraphs and port graphs, and we present a formal notation and operational
semantics for binets. We illustrate their expressive power by examples of
applications.


title:
A Fuzzy Logic based Method for Efficient Retrieval of Vague and
  Uncertain Spatial Expressions in Text Exploiting the Granulation of the
  Spatial Event Queries

abstract:
  The arrangement of things in n-dimensional space is specified as Spatial.
Spatial data consists of values that denote the location and shape of objects
and areas on the earths surface. Spatial information includes facts such as
location of features, the relationship of geographic features and measurements
of geographic features. The spatial cognition is a primal area of study in
various other fields such as Robotics, Psychology, Geosciences, Geography,
Political Sciences, Geographic Economy, Environmental, Mining and Petroleum
Engineering, Natural Resources, Epidemiology, Demography etc., Any text
document which contains physical location specifications such as place names,
geographic coordinates, landmarks, country names etc., are supposed to contain
the spatial information. The spatial information may also be represented using
vague or fuzzy descriptions involving linguistic terms such as near to, far
from, to the east of, very close. Given a query involving events, the aim of
this ongoing research work is to extract the relevant information from multiple
text documents, resolve the uncertainty and vagueness and translate them in to
locations in a map. The input to the system would be a text Corpus and a
Spatial Query event. The output of the system is a map showing the most
possible, disambiguated location of the event queried. The author proposes
Fuzzy Logic Techniques for resolving the uncertainty in the spatial
expressions.


title: Tune-out wavelengths for potassium

abstract:
  The five longest tune-out wavelengths for the potassium atom are determined
using a relativistic structure model which treats the atom as consisting of a
single valence electron moving outside a closed shell core. The importance of
various terms in the dynamic polarizability in the vicinity of the $4p_J$,
$5p_J$ and $6p_J$ transitions are discussed.


title: A note on Quarks and numbers theory

abstract:
  We express the basis vectors of Cartan fundamental representations of unitary
groups by binary numbers. We determine the expression of Gel'fand basis of SU
(3) based on the usual subatomic quarks notations and we represent it by binary
numbers. By analogy with the mesons and quarks we find a new property of prime
numbers.


title: A new type of second order cosmological lagrangians

abstract:
  We investigate a possible connection between Galileon gravity and
teleparallel gravity. We also propose a new type of second order cosmological
lagrangian and study a some of its properties.


title: Naturalness in a simple two Higgs doublet model

abstract:
  We study the implications of a criterion of naturalness for a simple two
Higgs doublet model in the context of the discovery of a Higgs like particle
with a mass at 125 GeV. This condition which measures the amount of fine tuning
further limits the parameter space of this particular model and together with
other phenomenological constraints leads to an allowed range of masses for the
other neutral or charged Higgs bosons: H, a^{\pm}, a^0.


title:
Different Asymptotic Spreading Speeds Induced by Advection in a
  Diffusion Problem with Free Boundaries

abstract:
  In this paper, we consider a Fisher-KPP equation with an advection term and
two free boundaries, which models the behavior of an invasive species in one
dimension space. When spreading happens (that is, the solution converges to a
positive constant), we use phase plane analysis and upper/lower solutions to
prove that the rightward and leftward asymptotic spreading speeds exist, both
are positive constants. Moreover, one of them is bigger and the other is
smaller than the spreading speed in the corresponding problem without advection
term.


title:
Fixed point theorems for Boolean networks expressed in terms of
  forbidden subnetworks

abstract:
  We are interested in fixed points in Boolean networks, {\em i.e.} functions
$f$ from $\{0,1\}^n$ to itself. We define the subnetworks of $f$ as the
restrictions of $f$ to the subcubes of $\{0,1\}^n$, and we characterizes a
class $\mathcal{F}$ of Boolean networks satisfying the following property:
Every subnetwork of $f$ has a unique fixed point if and only if $f$ has no
subnetwork in $\mathcal{F}$. This characterization generalizes the fixed point
theorem of Shih and Dong, which asserts that if for every $x$ in $\{0,1\}^n$
there is no directed cycle in the directed graph whose the adjacency matrix is
the discrete Jacobian matrix of $f$ evaluated at point $x$, then $f$ has a
unique fixed point. Then, denoting by $\mathcal{C}^+$ (resp. $\mathcal{C}^-$)
the networks whose the interaction graph is a positive (resp. negative) cycle,
we show that the non-expansive networks of $\mathcal{F}$ are exactly the
networks of $\mathcal{C}^+\cup \mathcal{C}^-$; and for the class of
non-expansive networks we get a "dichotomization" of the previous forbidden
subnetwork theorem: Every subnetwork of $f$ has at most (resp. at least) one
fixed point if and only if $f$ has no subnetworks in $\mathcal{C}^+$ (resp.
$\mathcal{C}^-$) subnetwork. Finally, we prove that if $f$ is a conjunctive
network then every subnetwork of $f$ has at most one fixed point if and only if
$f$ has no subnetwork in $\mathcal{C}^+$.


title:
Colloidal Anisotropic ZnO-Fe@FexOy Nanoarchitectures with
  Interface-Mediated Exchange-Bias and Band-Edge Ultraviolet Fluorescence

abstract:
  Hybrid nanocrystals (HNCs), based on ZnO nanorods (NRs) decorated with
magnetic Fe-based domains, were synthesized via a colloidal seeded-growth
method. The approach involved heterogeneous nucleation of Fe nanocrystals on
size-tailored ZnO nanorod seeds in a noncoordinating solvent, followed by
partial surface oxidation of the former to the corresponding Fe@FexOy
core@shell domains. HNCs with variable population and size of the Fe-based
nanodomains could be synthesized depending on the surface reactivity of the ZnO
seeds. The structure-property relationships in these HNCs were carefully
studied. In HNCs characterized by a large number of small Fe@FexOy core@shell
nanodomains on the ZnO seed surface, the interfacial communication across the
Fe-core and FexOy-shell generated a sizeable exchange-bias effect mediated by
frozen interfacial spins. On the other hand, in HNCs carrying a lower density
of comparatively larger Fe@FexOy domains, partial removal of the Fe core
created an inner void in-between that led to suppressed exchange coupling
anisotropy. As a further proof of functionality, the HNCs exhibited pronounced
band-edge ultraviolet fluorescence. The latter was blue-shifted compared to the
parent ZnO NRs, inferring coupling of the semiconductor and magnet sections.


title: Super-renormalizable Gravity

abstract:
  We review a class of higher derivative theories of gravity consistent at
quantum level. This class is marked by a non-polynomal entire function (form
factor), which averts extra degrees of freedom (including ghosts) and improves
the high energy behaviour of the loop amplitudes. By power counting arguments,
it is proved that the theory is super-renormalizable, i.e. only one-loop
divergences survive. At classical level, black holes and cosmological solutions
are singularity free.


title: "Polar" and "antiferromagnetic" order in f=1 many-boson systems

abstract:
  In a system of interacting f=1 bosons (in the subspace where the total spin
in the z-direction is vanishing), we prove inequalities for the ground state
expectation value of the density of spin-0 bosons. The inequalities imply that
the ground state possesses "polar" or "antiferromagnetic" order when the
quadratic Zeeman term q is large enough. In the low density limit, the
inequalities establish the existence of a sharp transition at q=0 when q is
varied.

categories: cond-mat.quant-gas cond-mat.stat-mech math-ph math.MP quant-ph


title:
Serendipitous Discovery of An Infrared Bow Shock Near PSR J1549-4848
  with Spitzer

abstract:
  We report on the discovery of an infrared cometary nebula around PSR
J1549$-$4848 in our Spitzer survey of a few middle-aged radio pulsars.
Following the discovery, multi-wavelength imaging and spectroscopic
observations of the nebula were carried out. We detected the nebula in Spitzer
IRAC 8.0, MIPS 24 and 70 $\mu$m imaging and in Spitzer IRS 7.5--14.4 $\mu$m
spectroscopic observations, and also in the WISE all-sky survey at 12 and 22
$\mu$m.These data were analyzed in detail, and we find that the nebula can be
described with a standard bow-shock shape, and that its spectrum contains
polycyclic aromatic hydrocarbon and H$_2$ emission features. However, it is not
certain which object drives the nebula. We analyze the field stars and conclude
that none of them can be the associated object because stars with a strong wind
or mass ejection that usually produce bow shocks are much brighter than the
field stars. The pulsar is approximately 15\arcsec\ away from the region in
which the associated object is expected to be located. In order to resolve the
discrepancy, we suggest that a highly collimated wind could be emitted from the
pulsar and produce the bow shock. X-ray imaging to detect the interaction of
the wind with the ambient medium and high-spatial resolution radio imaging to
determine the proper motion of the pulsar should be carried out, which will
help verify the association of the pulsar with the bow shock nebula.


title: Uniformizing The Moduli Stacks of Global G-Shtukas

abstract:
  This is the second in a sequence of articles, in which we explore moduli
stacks of global G-shtukas, the function field analogs for Shimura varieties.
Here G is a flat affine group scheme of finite type over a smooth projective
curve C over a finite field. Global G-shtukas are generalizations of Drinfeld
shtukas and analogs of abelian varieties with additional structure. We prove
that the moduli stacks of global G-shtukas are algebraic Deligne-Mumford stacks
separated and locally of finite type. They generalize various moduli spaces
used by different authors to prove instances of the Langlands program over
function fields. In the first article we explained the relation between global
G-shtukas and local P-shtukas, which are the function field analogs of
p-divisible groups. Here P is the base change of G to the complete local ring
at a point of C. When P is smooth with connected reductive generic fiber we
proved the existence of Rapoport-Zink spaces for local P-shtukas. In the
present article we use these spaces to (partly) uniformize the moduli stacks of
global G-shtukas for smooth G with connected fibers and reductive generic
fiber. This is our main result. It has applications to the analog of the
Langlands-Rapoport conjecture for our moduli stacks.


title:
URDP: General Framework for Direct CCA2 Security from any Lattice-Based
  PKE Scheme

abstract:
  Design efficient lattice-based cryptosystem secure against adaptive chosen
ciphertext attack (IND-CCA2) is a challenge problem. To the date, full
CCA2-security of all proposed lattice-based PKE schemes achieved by using a
generic transformations such as either strongly unforgeable one-time signature
schemes (SU-OT-SS), or a message authentication code (MAC) and weak form of
commitment. The drawback of these schemes is that encryption requires "separate
encryption". Therefore, the resulting encryption scheme is not sufficiently
efficient to be used in practice and it is inappropriate for many applications
such as small ubiquitous computing devices with limited resources such as smart
cards, active RFID tags, wireless sensor networks and other embedded devices.
  In this work, for the first time, we introduce an efficient universal random
data padding (URDP) scheme, and show how it can be used to construct a "direct"
CCA2-secure encryption scheme from "any" worst-case hardness problems in
(ideal) lattice in the standard model, resolving a problem that has remained
open till date. This novel approach is a "black-box" construction and leads to
the elimination of separate encryption, as it avoids using general
transformation from CPA-secure scheme to a CCA2-secure one. IND-CCA2 security
of this scheme can be tightly reduced in the standard model to the assumption
that the underlying primitive is an one-way trapdoor function.


title:
An irreversible magnetic-field dependence of low-temperature heat
  transport of spin-ice compound Dy_2Ti_2O_7 in a [111] field

abstract:
  We study the low-temperature thermal conductivity (\kappa) of Dy_2Ti_2O_7
along and perpendicular to the (111) plane and under the magnetic field along
the [111] direction. Besides the step-like decreases of \kappa at the
field-induced transitions from the spin-ice state to the kagom\'e-ice state and
then to the polarized state, an abnormal phenomenon is that the \kappa(H)
isotherms show a clear irreversibility at very low temperatures upon sweeping
magnetic field up and down. This phenomenon surprisingly has no correspondence
with the well-known magnetization hysteresis. Possible origins for this
irreversibility are discussed; in particular, a pinning effect of magnetic
monopoles in spin ice compound by the weak disorders is proposed.


title:
Observations of $B^0_s \rightarrow\psi(2S)\eta$ and
  $B^0_{(s)}\rightarrow\psi(2S)\pi^+\pi^-$ decays

abstract:
  First observations of the $B^0_s \rightarrow \psi(2S) \eta$, $B^0 \rightarrow
\psi(2S) \pi^+ \pi^-$ and $B^0_s \rightarrow \psi(2S) \pi^+ \pi^-$ decays are
made using a dataset corresponding to an integrated luminosity of 1.0~$fb^{-1}$
collected by the LHCb experiment in proton-proton collisions at a
centre-of-mass energy of $\sqrt{s}=7$ TeV. The ratios of the branching
fractions of each of the $\psi(2S)$ modes with respect to the corresponding
$J/\psi$ decays are \[ \frac{\mathcal{B}(B^0_s \rightarrow \psi(2S) \eta)
}{\mathcal{B}(B^0_s \rightarrow J/\psi \eta)}
=0.83\pm0.14\,(stat)\pm0.12\,(syst)\pm0.02\,(\mathcalB}), \] \[
\frac{\mathcal{B}(B^0 \rightarrow \psi(2S) \pi^+ \pi^-)}{\mathcal{B}(B^0
\rightarrow J/\psi \pi^+ \pi^-)}
=0.56\pm0.07\,(stat)\pm0.05\,(syst)\pm0.01\,(\mathcal{B}), \] \[
\frac{\mathcal{B}(B^0_s \rightarrow \psi(2S) \pi^+ \pi^-)}{\mathcal{B}(B^0_s
\rightarrow J/\psi \pi^+ \pi^-)}
=0.34\pm0.04\,(stat)\pm0.03\,(syst)\pm0.01\,(\mathcal{B}), \] where the third
uncertainty corresponds to the uncertainties of the dilepton branching
fractions of the $J/\psi$ and $\psi(2S)$ meson decays.


title:
Delta and Omega electromagnetic form factors in a covariant three-body
  approach

abstract:
  We study baryons as three-body systems using the QCD degrees of freedom in
the framework of covariant Bethe-Salpeter equations. The interaction among
quarks is reduced to a vector-vector interaction via a single dressed-gluon
exchange (Rainbow-Ladder truncation). The formalism allows for the study of the
hadron spectrum as well as their internal properties. We will present the
calculation of electromagnetic properties of spin-3/2 baryons. The model
independent features of our results are assessed using two different models for
the dressings.


title:
CdSe-Au nanorod networks welded by gold domains - a promising structure
  for nano-optoelectronic components

abstract:
  CdSe-Au networks were synthesized by a colloidal chemistry technique. They
entail CdSe nanorods with a diameter of ~10 nm and a length of ~40 nm, which
are joined together by Au domains (~5 nm). Individual networks were positioned
by AC dielectrophoresis between bow-tie electrodes with a gap of ~100 nm and
their conductivity as well as the photoelectrical properties were investigated.
Nanorod networks, with multiple Au domains on the nanorod surface, displayed
stable conductivity that was not sensitive to blue laser light illumination.
Such nanostructures were transformed by thermal annealing to networks with Au
domains only at the nanorod tips. In this system the overall conductivity was
reduced, but a clear photocurrent signal could be detected, manifesting
semiconductor behavior.


title: Representations of vertex operator algebras and bimodules

abstract:
  For a vertex operator algebra V, a V-module M and a nonnegative integer n, an
A_n(V)-bimodule A_n(M) is constructed and studied. The connection between
A_n(M) and intertwining operators are discussed. In the case that V is
rational, A_n(M) for irreducible V-module M is given explicitly.


title: Simulated ALMA observations of collapsing low-mass dense cores

abstract:
  We present a possible identification strategy for first hydrostatic core
(FHSC) candidates and make predictions of ALMA dust continuum emission maps
from these objects. We analyze the results given by the different bands and
array configurations and identify which combinations of the two represent our
best chance of solving the fragmentation issue in these objects. If the
magnetic field is playing a role, the emission pattern will show evidence of a
pseudo-disk and even of a magnetically driven outflow, which pure
hydrodynamical calculations cannot reproduce.


title: 2d CDT is 2d Horava-Lifshitz quantum gravity

abstract:
  Causal Dynamical Triangulations (CDT) is a lattice theory where aspects of
quantum gravity can be studied. Two-dimensional CDT can be solved analytically
and the continuum (quantum) Hamiltonian obtained. In this article we show that
this continuum Hamiltonian is the one obtained by quantizing two-dimensional
projectable Horava-Lifshitz gravity.


title: On rationality of vertex operator superalgebras

abstract:
  It is proved that g-rationality of a vertex operator superalgebra
V=V_{\bar0}+V_{\bar1} for all g in G imply rationality of V^G, and also imply
that each irreducible V^G-module is a submodule of an irreducible g-twisted
V-module for some g in G, where G is any finite abelian subgroup of Aut(V). We
also prove that for any finite solvable G, rationality of V^G implies
g-rationality of V for any g in G.


title: Thermal field theory to all orders in gradient expansion

abstract:
  We present a new perturbative formulation of non-equilibrium thermal field
theory, based upon non-homogeneous free propagators and time-dependent
vertices. The resulting time-dependent diagrammatic perturbation series are
free of pinch singularities without the need for quasi-particle approximation
or effective resummation of finite widths. After arriving at a physically
meaningful definition of particle number densities, we derive master time
evolution equations for statistical distribution functions, which are valid to
all orders in perturbation theory and all orders in a gradient expansion. For a
scalar model, we make a loopwise truncation of these evolution equations,
whilst still capturing fast transient behaviour, which is found to be dominated
by energy-violating processes, leading to non-Markovian evolution of memory
effects.


title: Clustering of galaxies around GRB sight-lines

abstract:
  There is evidence of an overdensity of strong intervening MgII absorption
line systems distributed along the lines of sight towards GRB afterglows
relative to quasar sight-lines. If this excess is real, one should also expect
an overdensity of field galaxies around GRB sight-lines, as strong MgII tends
to trace these sources. In this work, we test this expectation by calculating
the two point angular correlation function of galaxies within
120$^{\prime\prime}$ ($\sim470~h_{71}^{-1}~\mathrm{Kpc}$ at $\langle z\rangle
\sim0.4$) of GRB afterglows. We compare the Gamma-ray burst Optical and
Near-infrared Detector (GROND) GRB afterglow sample -- one of the largest and
most homogeneous samples of GRB fields -- with galaxies and AGN found in the
COSMOS-30 photometric catalog. We find no significant signal of anomalous
clustering of galaxies at an estimated median redshift of $z\sim0.3$ around GRB
sight-lines, down to $K_{\mathrm{AB}}<19.3$. This result is contrary to the
expectations from the MgII excess derived from GRB afterglow spectroscopy,
although many confirmed galaxy counterparts to MgII absorbers may be too faint
to detect in our sample -- especially those at $z>1$. We note that the addition
of higher sensitivity Spitzer IRAC or HST WFC3 data for even a subset of our
sample would increase this survey's depth by several orders of magnitude,
simultaneously increasing statistics and enabling the investigation of a much
larger redshift space.}


title:
Realtime market microstructure analysis: online Transaction Cost
  Analysis

abstract:
  Motivated by the practical challenge in monitoring the performance of a large
number of algorithmic trading orders, this paper provides a methodology that
leads to automatic discovery of the causes that lie behind a poor trading
performance. It also gives theoretical foundations to a generic framework for
real-time trading analysis. Academic literature provides different ways to
formalize these algorithms and show how optimal they can be from a
mean-variance, a stochastic control, an impulse control or a statistical
learning viewpoint. This paper is agnostic about the way the algorithm has been
built and provides a theoretical formalism to identify in real-time the market
conditions that influenced its efficiency or inefficiency. For a given set of
characteristics describing the market context, selected by a practitioner, we
first show how a set of additional derived explanatory factors, called anomaly
detectors, can be created for each market order. We then will present an online
methodology to quantify how this extended set of factors, at any given time,
predicts which of the orders are underperforming while calculating the
predictive power of this explanatory factor set. Armed with this information,
which we call influence analysis, we intend to empower the order monitoring
user to take appropriate action on any affected orders by re-calibrating the
trading algorithms working the order through new parameters, pausing their
execution or taking over more direct trading control. Also we intend that use
of this method in the post trade analysis of algorithms can be taken advantage
of to automatically adjust their trading action.


title:
Assessing the Dimensions of Relationship Quality in B2C E Banking
  Services: An Empirical Comparative Study

abstract:
  In B2C Online services contexts where relationships between customers and
service providers matter due to the lack of faceto- face interactions,
uncertainty, intangibility, hyper competition, increasing risk of fraud and
lack of trust. Relationship quality (RQ) is replacing service quality as a key
source of superior performance and competitive advantage. Accordingly, this
study investigates the dimensions of relationship quality from e-Banking
services and explores the differences among customers of Jordanian and foreign
banks. Many of the foreign banks in Jordan are equipped with large financial
capital, having high banking and financial experiences and are offering many
modern hi-tech banking services. This situation makes Jordanian banks in front
of unprecedented competition and so they have invested heavily to develop their
e-banking services, in order to strengthening their relationships with existing
customers, enhancing their trust, letting them satisfied, ensuring their
commitment and attracting of new ones. This paper aims to identify the key
dimensions that shape the relationship quality among Jordanian and foreign
banks and their customers who are utilizing the e-Banking services. Based on an
extensive review of relevant literature, we have formulated nine hypotheses and
identified three factors (satisfaction, trust, and commitment) that may affect
the competitiveness and success of Jordanian and foreign banks. Survey data
from 350 customers from four Jordanian banks and four foreign banks in Amman
city the capital of Jordan were collected and used to test the proposed
hypotheses. Based on the structural equation modeling and Ttest analyses, our
empirical analysis demonstrates several key findings.


title:
Nonperturbative infrared enhancement of nonGaussian correlators in de
  Sitter space

abstract:
  We compute the four-point correlation function of a light O(N) scalar field
in de Sitter space in the large-N limit. For superhorizon momentum modes,
infrared effects strongly enhance the size of loop contributions. We find that
in the deep infrared limit, the latter are of the same order as the tree-level
one. The tree-level momentum structure, characteristic of a contact term, gets
renormalized by a factor of order unity. In addition loop contributions give
rise to a new momentum structure, characteristic of an exchange diagram,
corresponding to the exchange of an effective composite scalar degree of
freedom.


title:
Long-lived quantum coherence of two-level spontaneous emission models
  within structured environments

abstract:
  We investigate the long-lived quantum coherence of two-level spontaneous
emission models within structured environments. The population of the system
under the asymptotic non-Markovian dynamics is linked to the spectral density
of the reservoir through a general functional relation between them. We figure
out explicitly the preservation of quantum coherence, via notions of
entanglement and quantum discord, in connection with the spectral parameters of
Ohmic class reservoirs and then show how to achieve them optimally. We expect
these results to contribute towards reservoir engineering with the aim of
enhancing stationary quantum coherence in noisy environments.


title:
Heavy Element Abundance Patterns in Hot White Dwarfs from a Survey of
  the FUSE Archive

abstract:
  We present a series of systematic abundance measurements for 89 hot DA white
dwarfs drawn from the FUSE observation archive. These stars span the
temperature range ~ 20000-70000K, and form the largest sample to-date,
exceeding our earlier study, based mainly on IUE and HST data, by a factor
three. Using the heavy element blanketed non-LTE stellar atmosphere
calculations from this previous work, we are able to measure the abundances of
carbon, silicon, phosphorus and sulphur and examine how they change as the
stars cool. We are able to establish the broad range of abundances seen in a
given temperature range and establish the incidence of stars which, like HZ43,
appear to (surprisingly) be completely devoid of any material other than H in
their atmospheres. As a result we can begin to identify stars with peculiar
abundances in this temperature range and determine whether or not these objects
might be accreting planetary debris, as has been inferred for many cooler
objects.


title:
Analytic evaluation of the electronic self-energy in the GW
  approximation for two electrons on a sphere

abstract:
  The GW approximation for the electronic self-energy is an important tool for
the quantitative prediction of excited states in solids, but its mathematical
exploration is hampered by the fact that it must, in general, be evaluated
numerically even for very simple systems. In this paper I describe a nontrivial
model consisting of two electrons on the surface of a sphere, interacting with
the normal long-range Coulomb potential, and show that the GW self-energy, in
the absence of self-consistency, can in fact be derived completely analytically
in this case. The resulting expression is subsequently used to analyze the
convergence of the energy gap between the highest occupied and the lowest
unoccupied quasiparticle orbital with respect to the total number of states
included in the spectral summations. The asymptotic formula for the truncation
error obtained in this way, whose dominant contribution is proportional to the
cutoff energy to the power -3/2, may be adapted to extrapolate energy gaps in
other systems.


title: On quantitative Schur and Dunford-Pettis properties

abstract:
  We show that the dual to any subspace of $c_0(\Gamma)$ has the strongest
possible quantitative version of the Schur property. Further, we establish
relationship between the quantitative Schur property and quantitative versions
of the Dunford-Pettis property. Finally, we apply these results to show, in
particular, that any subspace of the space of compact operators on $\ell_p$
($1<p<\infty$) with Dunford-Pettis property satisfies automatically both its
quantitative versions.


title: Max-min measures on ultrametric spaces

abstract:
  The ultrametrization of the set of all probability measures of compact
support on the ultrametric spaces was first defined by Hartog and de Vink. In
this paper we consider a similar construction for the so called max-min
measures on the ultrametric spaces. In particular, we prove that the functors
max-min measures and idempotent measures are isomorphic. However, we show that
this is not the case for the monads generated by these functors.


title:
Singlet oxygen luminescence detection with a fiber-coupled
  superconducting nanowire single-photon detector

abstract:
  Direct monitoring of singlet oxygen (1O2) luminescence is a particularly
challenging infrared photodetection problem. 1O2, an excited state of the
oxygen molecule, is a crucial intermediate in many biological processes. We
employ a low noise superconducting nanowire single-photon detector to record
1O2 luminescence at 1270 nm wavelength from a model photosensitizer (Rose
Bengal) in solution. Narrow band spectral filtering and chemical quenching is
used to verify the 1O2 signal, and lifetime evolution with the addition of
protein is studied. Furthermore, we demonstrate the detection of 1O2
luminescence through a single optical fiber, a marked advance for dose
monitoring in clinical treatments such as photodynamic therapy.

categories: physics.ins-det physics.bio-ph physics.chem-ph physics.med-ph physics.optics


title:
Unified description of cosmological and static solutions in affine
  generalized theories of gravity: vecton - scalaron duality and its
  applications

abstract:
  We briefly describe the simplest class of affine theories of gravity in
multidimensional space-times with symmetric connections and their reductions to
two-dimensional dilaton - vecton gravity field theories (DVG). The distinctive
feature of these theories is the presence of an absolutely neutral massive (or
tachyonic) vector field (vecton) with essentially nonlinear coupling to the
dilaton gravity (DG). We show that in DVG the vecton field can be consistently
replaced by an effectively massive scalar field (scalaron) with an unusual
coupling to dilaton gravity. With this vecton - scalaron duality, one can use
methods and results of the standard DG coupled to usual scalars (DGS) in more
complex dilaton - scalaron gravity theories (DSG) equivalent to DVG. We present
the DVG models derived by reductions of multidimensional affine theories and
obtain one-dimensional dynamical systems simultaneously describing cosmological
and static states in any gauge. Our approach is fully applicable to studying
static and cosmological solutions in multidimensional theories as well as in
general one-dimensional DGS models. We focus on global properties of the
models, look for integrals and analyze the structure of the solution spaces. In
integrable cases, it can be usefully visualized by drawing a `topological
portrait' resembling phase portraits of dynamical systems and simply exposing
global properties of static and cosmological solutions, including horizons,
singularities, etc. For analytic approximations we also propose an integral
equation well suited for iterations.


title:
Parametrization-free determination of the shape parameters for the pion
  electromagnetic form factor

abstract:
  Recent data from high statistics experiments that have measured the modulus
of the pion electromagnetic form factor from threshold to relatively high
energies are used as input in a suitable mathematical framework of analytic
continuation to find stringent constraints on the shape parameters of the form
factor at $t=0$. The method uses also as input a precise description of the
phase of the form factor in the elastic region based on Fermi-Watson theorem
and the analysis of the $\pi\pi$ scattering amplitude with dispersive Roy
equations, and some information on the spacelike region coming from recent high
precision experiments. Our analysis confirms the inconsistencies of several
data on the modulus, especially from low energies, with analyticity and the
input phase, noted in our earlier work. Using the data on the modulus from
energies above $0.65 \,{\rm GeV}$, we obtain, with no specific parametrization,
the prediction $<r_\pi^2 \r angle \in\, (0.42,\,0.44)\,\fmsq $ for the charge
radius. The same formalism leads also to very narrow allowed ranges for the
higher-order shape parameters at $t=0$, with a strong correlation among them.


title: On strongly indefinite systems involving the fractional Laplacian

abstract:
  In this paper we study strongly indefinite systems involving the fractional
Laplacian on bounded domains. We obtain existence and non-existence results, $a
priori$ estimates of Gidas-Spruck type, and the symmetric property.


title: Exact Evaluation Of Some Highly Oscillatory Integrals

abstract:
  In this note a general result is proved that can be used to evaluate exactly
a class of highly oscillatory integrals.


title:
Localization in coupled heterogeneously disordered transport channels on
  the Bethe lattice

abstract:
  We study the Anderson localization in systems, in which transport channels
with rather different properties are coupled together. This problem arises
naturally in systems of hybrid particles, such as exciton-polaritons, where it
is not obvious which transport channel dominates the coupled system. Here we
address the question of whether the coupling between a strongly and a weakly
disordered channel will result in localized (insulating) or delocalized
(metallic) behavior. Complementing an earlier study in 1D [H. Y. Xie, V. E.
Kravtsov, and M. M\"uller, Phys. Rev. B \textbf{86} 014205 (2012)], the problem
is solved here on a bilayer Bethe lattice with parametrically different
parameters. The comparison with the analytical solution in 1D shows that
dimensionality plays a crucial role. In D=1 localization is in general
dominated by the dirtier channel, which sets the backscattering rate. In
contrast, on the Bethe lattice a delocalized channel remains almost always
delocalized, even when coupled to strongly localized channels. We conjecture
that this phenomenology holds true for finite dimensions $D>2$ as well.
Possible implications for interacting many-body systems are discussed.


title:
Convergence to the equilibrium state for Bose-Einstein 1-D Kac grazing
  limit model

abstract:
  The convergence to the equilibrium of the solution of the quantum Kac model
for Bose-Einstein identical particles is studied in this paper. Using the
relative entropy method and a detailed analysis of the entropy production, the
exponential decay rate is obtained under suitable assumptions.The theoretical
results are further illustrated by numerical simulations.


title: On a result of Green and Griffiths

abstract:
  We present a simple proof of a result of Green and Griffiths, which states
that for the generic curve C of genus g >= 4, the 0-cycle K \times K - (2g - 2)
K_\Delta is non-torsion in CH^2(C \times C). The proof is elementary and works
in all characteristics.