title:
Three-dimensional magnetohydrodynamic simulation of the solar magnetic
  flux emergence: Parametric study on the horizontal divergent flow

abstract:
  Solar active regions are formed through the emergence of magnetic flux from
the deeper convection zone. Recent satellite observations have shown that a
horizontal divergent flow (HDF) stretches out over the solar surface just
before the magnetic flux appearance. The aims of this study are to investigate
the driver of the HDF and to see the dependency of the HDF on the parameters of
the magnetic flux in the convection zone. We conduct three-dimensional
magnetohydrodynamic (3D MHD) numerical simulations of the magnetic flux
emergence and vary the parameters in the initial conditions. An analytical
approach is also taken to explain the dependency. The horizontal gas pressure
gradient is found to be the main driver of the HDF. The maximum HDF speed shows
positive correlations with the field strength and twist intensity. The HDF
duration has a weak relation with the twist, while it shows negative dependency
on the field strength only in the case of the stronger field regime. Parametric
dependencies analyzed in this study may allow us to probe the structure of the
subsurface magnetic flux by observing properties of the HDF.


title: Enhancing magnetic near-field intensities with dielectric resonators

abstract:
  We measure strong magnetic field intensities in a subwavelength gap
separating two dielectric resonators. This dimer magnetic antenna is
characterized in the GHz spectral regime when considering three conditions of
illumination. We detail the different magneto-electric couplings involved in
the enhancement of the near magnetic field and derive the analytical expression
of the magnetic field intensities. The results reported here in the GHz domain
can be extended to other spectral domains since they are obtained with a
dielectric permittivity 16 that can be observed in a very broad spectrum
ranging from optics to radio-frequencies.


title:
MAP Estimators and Their Consistency in Bayesian Nonparametric Inverse
  Problems

abstract:
  We consider the inverse problem of estimating an unknown function $u$ from
noisy measurements $y$ of a known, possibly nonlinear, map $\mathcal{G}$
applied to $u$. We adopt a Bayesian approach to the problem and work in a
setting where the prior measure is specified as a Gaussian random field
$\mu_0$. We work under a natural set of conditions on the likelihood which
imply the existence of a well-posed posterior measure, $\mu^y$. Under these
conditions we show that the {\em maximum a posteriori} (MAP) estimator is
well-defined as the minimiser of an Onsager-Machlup functional defined on the
Cameron-Martin space of the prior; thus we link a problem in probability with a
problem in the calculus of variations. We then consider the case where the
observational noise vanishes and establish a form of Bayesian posterior
consistency. We also prove a similar result for the case where the observation
of $\mathcal{G}(u)$ can be repeated as many times as desired with independent
identically distributed noise. The theory is illustrated with examples from an
inverse problem for the Navier-Stokes equation, motivated by problems arising
in weather forecasting, and from the theory of conditioned diffusions,
motivated by problems arising in molecular dynamics.


title: Low temperature transport on surface conducting diamond

abstract:
  Magneto-transport measurements were performed on surface conducting
hydrogen-terminated diamond (100) hall bars at temperatures between 0.1-5 K in
magnetic fields up to 8T.


title:
Generalised Jantzen filtration of Lie superalgebras II: the exceptional
  cases

abstract:
  Let $g$ be an exceptional Lie superalgebra, and let $p$ be the maximal
parabolic subalgebra which contains the distinguished Borel subalgebra and has
a purely even Levi subalgebra. For any parabolic Verma module in the parabolic
category $O^p$, it is shown that the Jantzen filtration is the unique Loewy
filtration, and the decomposition numbers of the layers of the filtration are
determined by the coefficients of inverse Kazhdan-Lusztig polynomials. An
explicit description of the submodule lattices of the parabolic Verma modules
is given, and formulae for characters and dimensions of the finite dimensional
simple modules are obtained.


title:
Properties of the defect modes in 1D lossy photonic crystals containing
  two types of negative-index-material defects

abstract:
  In this paper, the characteristic matrix method is employed to theoretically
investigate the propagation of electromagnetic waves through one-dimensional
defective lossy photonic crystals (PCs) composed of negative index materials
(NIMs) and positive index materials (PIMs). We consider symmetric and
asymmetric geometric structures with two different types of NIM defect layers
at the center of the structure. The effects of the polarization and the angle
of incidence on the defect modes in the transmission spectra of both structures
are investigated. The results show that the number of the defect modes within
the photonic band gap (PBG) depends on the type of the NIM defect layer and is
independent of the geometrical structure. Moreover, it is shown that the defect
mode frequency increases as the angle of incidence increases. This property is
also independent of the geometry of the structure. The results can lead to
designing new types of narrowband and multichannel transmission filters.


title: Nonvolatile Memory Cells Based on MoS2/Graphene Heterostructures

abstract:
  Memory cells are an important building block of digital electronics. We
combine here the unique electronic properties of semiconducting monolayer MoS2
with the high conductivity of graphene to build a 2D heterostructure capable of
information storage. MoS2 acts as a channel in an intimate contact with
graphene electrodes in a field-effect transistor geometry. Our prototypical
all-2D transistor is further integrated with a multilayer graphene charge
trapping layer into a device that can be operated as a nonvolatile memory cell.
Because of its band gap and 2D nature, monolayer MoS2 is highly sensitive to
the presence of charges in the charge trapping layer, resulting in a factor of
10000 difference between memory program and erase states. The two-dimensional
nature of both the contact and the channel can be harnessed for the fabrication
of flexible nanoelectronic devices with large-scale integration.


title:
On the realization of the Gelfand Character of a finite group as a
  twisted trace

abstract:
  We show that the Gelfand character $ \chi_G$ of a finite group $G $ (i.e. the
sum of all irreducible complex characters
  of $G$ ) may be realized as a `` twisted trace'' $ g \mapsto Tr( \rho_g \circ
T) $ for a suitable involutive linear automorphism $T$ of $L^2(G)$, where
$(L^2(G), \rho)$ is the right regular representation of $G$. Moreover, we prove
that under certain hypotheses $T(f)= f \circ L \;\; (f \in L^2(G)), $ where $ L
$ is an involutive antiautomorphism of $ G.$ The natural representation $\tau$
of $G$ associated to the natural $L$-conjugacy action of $G$ in the fixed point
set $Fix_G(L)$ of $L$ turns out to be a Gelfand Model for $G$ in some cases. We
show that $(L^2(Fix_G(L)), \tau) $ fails to be a Gelfand Model if $G$ admits
non trivial central involutions.


title: The immaculate basis of the non-commutative symmetric functions

abstract:
  FPSAC 2013 Extended Abstract. We introduce a new basis of the non-commutative
symmetric functions whose elements have Schur functions as their commutative
images. Dually, we build a basis of the quasi-symmetric functions which expand
positively in the fundamental quasi-symmetric functions and decompose Schur
functions according to a signed combinatorial formula.


title: Damping law of photocount distribution in a dissipative channel

abstract:
  For a dissipative channel governed by the master equation of density
operator}$d\rho /dt=\kappa \left(2a\rho a^{\dagger}-a^{\dagger}a\rho -\rho
a^{\dagger}a\right) ,${\small \ we find that photocount distribution formula at
time}$t,${\small \}$p\left(n,t\right) =Tr\left\{\rho \left(t\right)
\mathbf{\colon}\left(\xi a^{\dagger}a\right) ^{n}e^{-\xi a^{\dagger}a}/n!\colon
\right\} ,${\small \ becomes}$p\left(n,t\right) =Tr% \left[ \rho \left(0\right)
\mathbf{\colon}\left(\xi e^{-2\kappa t}a^{\dagger}a\right) ^{n}e^{-\xi
e^{-2\kappa t}a^{\dagger}a}/n!\colon % \right] ,${\small \ as if the quantum
efficiency}$\xi ${\small \ of the detector becomes}$\xi e^{-2\kappa t}${\ This
law greatly simplifies the theoretical study of photocount distribution for
quantum optical field.


title: A Survey of Appearance Models in Visual Object Tracking

abstract:
  Visual object tracking is a significant computer vision task which can be
applied to many domains such as visual surveillance, human computer
interaction, and video compression. In the literature, researchers have
proposed a variety of 2D appearance models. To help readers swiftly learn the
recent advances in 2D appearance models for visual object tracking, we
contribute this survey, which provides a detailed review of the existing 2D
appearance models. In particular, this survey takes a module-based architecture
that enables readers to easily grasp the key points of visual object tracking.
In this survey, we first decompose the problem of appearance modeling into two
different processing stages: visual representation and statistical modeling.
Then, different 2D appearance models are categorized and discussed with respect
to their composition modules. Finally, we address several issues of interest as
well as the remaining challenges for future research on this topic. The
contributions of this survey are four-fold. First, we review the literature of
visual representations according to their feature-construction mechanisms
(i.e., local and global). Second, the existing statistical modeling schemes for
tracking-by-detection are reviewed according to their model-construction
mechanisms: generative, discriminative, and hybrid generative-discriminative.
Third, each type of visual representations or statistical modeling techniques
is analyzed and discussed from a theoretical or practical viewpoint. Fourth,
the existing benchmark resources (e.g., source code and video datasets) are
examined in this survey.


title: Measuring Protoplanetary Disk Accretion with H I Pf-beta

abstract:
  In this work, we introduce the use of H I Pfund-beta (4.6538 micron) as a
tracer of mass accretion from protoplanetary disks onto young stars. Pf-beta
was serendipitously observed in NIRSPEC and CRIRES surveys of CO fundamental
emission, amounting to a sample size of 120 young stars with detected Pf-beta
emission. Using a subsample of disks with previously measured accretion
luminosities, we show that Pf-beta line luminosity is well correlated with
accretion luminosity over a range of at least three orders of magnitude. We use
this correlation to derive accretion luminosities for all 120 targets, 65 of
which are previously unreported in the literature. We also report accretion
rates for 67 targets, 16 previously unmeasured. Our large sample size and our
ability to probe high extinction values allow for relatively unbiased
comparisons between different types of disks. We find that the transitional
disks in our sample have lower than average Pf-beta line luminosities, and thus
accretion luminosities, at a marginally significant level. We also show that
high Pf-beta equivalent width is a signature of transitional disks with high
inner disk gas/dust ratios. In contrast, we find that disks with signatures of
slow disk winds have Pf-beta luminosities comparable to those of other disks in
our sample. Finally, we investigate accretion rates for stage I disks,
including significantly embedded targets. We find that stage I and stage II
disks have statistically indistinguishable Pf-beta line luminosities, implying
similar accretion rates, and that the accretion rates of stage I disks are too
low to be consistent with quiescent accretion. Our results are instead
consistent with both observational and theoretical evidence that stage I
objects experience episodic, rather than quiescent, accretion.


title:
Ensembling classification models based on phalanxes of variables with
  applications in drug discovery

abstract:
  Statistical detection of a rare class of objects in a two-class
classification problem can pose several challenges. Because the class of
interest is rare in the training data, there is relatively little information
in the known class response labels for model building. At the same time the
available explanatory variables are often moderately high dimensional. In the
four assays of our drug-discovery application, compounds are active or not
against a specific biological target, such as lung cancer tumor cells, and
active compounds are rare. Several sets of chemical descriptor variables from
computational chemistry are available to classify the active versus inactive
class; each can have up to thousands of variables characterizing molecular
structure of the compounds. The statistical challenge is to make use of the
richness of the explanatory variables in the presence of scant response
information. Our algorithm divides the explanatory variables into subsets
adaptively and passes each subset to a base classifier. The various base
classifiers are then ensembled to produce one model to rank new objects by
their estimated probabilities of belonging to the rare class of interest. The
essence of the algorithm is to choose the subsets such that variables in the
same group work well together; we call such groups phalanxes.


title:
Charge symmetry breaking from a chiral extrapolation of moments of quark
  distribution functions

abstract:
  We present a determination, from lattice QCD, of charge symmetry violation in
the spin- independent and spin-dependent parton distribution functions of the
nucleon. This is done by chirally extrapolating recent QCDSF/UKQCD
Collaboration lattice simulations of the first several Mellin moments of the
parton distribution functions of octet baryons to the physical point. We find
small chiral corrections for the polarized moments, while the corrections are
quantitatively significant in the unpolarized case.


title:
Global attractivity of almost periodic solutions for competitive
  Lotka-Volterra diffusion system

abstract:
  In this paper, two competitive Lotka-Volterra populations in the
two-patch-system with diffusion are considered. Each of the two spiecies can
diffuse indepently and discretely between its in intrapatch and interpatch. By
means of constructing Liapunov function, under moderate condition, the system
has a unique almost periodic solution and which is asymptotically stable and
globally attractive .


title:
The RAppArmor Package: Enforcing Security Policies in R Using Dynamic
  Sandboxing on Linux

abstract:
  The increasing availability of cloud computing and scientific super computers
brings great potential for making R accessible through public or shared
resources. This allows us to efficiently run code requiring lots of cycles and
memory, or embed R functionality into, e.g., systems and web services. However
some important security concerns need to be addressed before this can be put in
production. The prime use case in the design of R has always been a single
statistician running R on the local machine through the interactive console.
Therefore the execution environment of R is entirely unrestricted, which could
result in malicious behavior or excessive use of hardware resources in a shared
environment. Properly securing an R process turns out to be a complex problem.
We describe various approaches and illustrate potential issues using some of
our personal experiences in hosting public web services. Finally we introduce
the RAppArmor package: a Linux based reference implementation for dynamic
sandboxing in R on the level of the operating system.


title: Reconciling the GRB rate and star formation histories

abstract:
  While there are numerous indications that GRBs arise from the death of
massive stars, the GRB rate does not follow the global cosmic star formation
rate and, within their hosts, GRBs are more concentrated in regions of very
high star formation. We explain both puzzles here. Using the publicly available
VESPA database of SDSS Data Release 7 spectra, we explore a multi-parameter
space in galaxy properties, like stellar mass, metallicity, dust etc. to find
the sub-set of galaxies that reproduce the recently obtained GRB rate by
Wanderman & Piran (2010). We find that only galaxies with present stellar
masses below < 10^{10} Msun and low metallicity reproduce the observed GRB
rate. This is consistent with direct observations of GRB hosts and provides an
independent confirmation of the nature of GRB hosts. Because of the
significantly larger sample of SDSS galaxies, we compute their correlation
function and show that they are anti-biased with respect to the dark matter:
they are in filaments and voids. Using recent observations of massive stars in
local dwarfs we show how the fact that GRB hosts galaxies are dwarfs can
explain the observation that GRBs are more concentrated in regions of high star
formation than SNe. Finally we explain these results using new theoretical
advances in the field of star formation.


title:
Performance of Titanium-Oxide/Polymer Insulation in Bi-2212/Ag-alloy
  Round Wire Wound Superconducting Coils

abstract:
  Conductor insulation is one of the key components needed to make Ag-alloy
clad Bi2Sr2CaCu2O8+x (Bi-2212/Ag) superconducting round wire (RW) successful
for high field magnet applications as dielectric standoff and high winding
current densities (Jw) directly depend on it. In this study, a TiO2/polymer
insulation coating developed by nGimat LLC was applied to test samples and a
high field test coil. The insulation was investigated by differential thermal
analysis (DTA), thermo-gravimetric analysis (TGA), scanning electron microscopy
(SEM), dielectric properties measurement, and transport critical current (Ic)
properties measurement. About 29% of the insulation by weight is polymer. When
the Bi-2212/Ag wire is full heat treated, this decomposes with slow heating to
400{\deg}C in pure O2. After the full reaction, we found that the TiO2 did not
degrade the critical current properties, adhered well to the conductor, and
provided a breakdown voltage of >100 V, which allowed the test coil to survive
quenching in 31.2 T background field, while providing a 2.6 T field increment.
For Bi-2212/Ag RW with a typical diameter of 1.0-1.5 mm, this ~15 um thick
insulation allows a very high coil packing factor of ~0.74, whereas earlier
alumino-silicate braid insulation only allows packing factors of 0.38-0.48.


title: Studies of jet mass in dijet and W/Z + jet events

abstract:
  Invariant mass spectra for jets reconstructed using the anti-kt and
Cambridge-Aachen algorithms are studied for different jet "grooming" techniques
in data corresponding to an integrated luminosity of 5 inverse femtobarns,
recorded with the CMS detector in proton-proton collisions at the LHC at a
center-of-mass energy of 7 TeV. Leading-order QCD predictions for inclusive
dijet and W/Z+jet production combined with parton-shower Monte Carlo models are
found to agree overall with the data, and the agreement improves with the
implementation of jet grooming methods used to distinguish merged jets of large
transverse momentum from softer QCD gluon radiation.


title: Lifting harmonic morphisms I: metrized complexes and Berkovich skeleta

abstract:
  Let K be an algebraically closed, complete non-Archimedean field. The purpose
of this paper is to carefully study the extent to which finite morphisms of
algebraic K-curves are controlled by certain combinatorial objects, called
skeleta. A skeleton is a metric graph embedded in the Berkovich analytification
of X. A skeleton has the natural structure of a metrized complex of curves. We
prove that a finite morphism of K-curves gives rise to a finite harmonic
morphism of a suitable choice of skeleta. We use this to give analytic proofs
of stronger "skeletonized" versions of some foundational results
ofLiu-Lorenzini, Coleman, and Liu on simultaneous semistable reduction of
curves. We then consider the inverse problem of lifting finite harmonic
morphisms of metrized complexes to morphisms of curves over K. We prove that
every tamely ramified finite harmonic morphism of \Lambda-metrized complexes of
k-curves lifts to a finite morphism of K-curves. If in addition the
ramification points are marked, we obtain a complete classification of all such
lifts along with their automorphisms. This generalizes and provides new
analytic proofs of earlier results of Sa\"idi and Wewers. As an application, we
discuss the relationship between harmonic morphisms of metric graphs and
induced maps between component groups of N\'eron models, providing a negative
answer to a question of Ribet motivated by number theory.
  This article is the first in a series of two. The second article contains
several applications of our lifting results to questions about lifting
morphisms of tropical curves.


title: Ratio Asymptotics, Hessenberg Matrices, and Weak Asymptotic Measures

abstract:
  We discuss the relationship between ratio asymptotics for general orthogonal
polynomials and the asymptotics of the associated Bergman shift operator. More
specifically, we consider the case in which a measure is supported on an
infinite compact subset of the complex plane. We show that there is a
straightforward connection between the corresponding orthonormal polynomials
exhibiting ratio asymptotics and the corresponding Bergman shift operator being
asymptotically Toeplitz. We also discuss a connection to the weak asymptotics
of the measures derived from the orthonormal polynomials.


title: Security and Privacy Issues in Cloud Computing

abstract:
  Cloud computing transforms the way information technology (IT) is consumed
and managed, promising improved cost efficiencies, accelerated innovation,
faster time-to-market, and the ability to scale applications on demand
(Leighton, 2009). According to Gartner, while the hype grew exponentially
during 2008 and continued since, it is clear that there is a major shift
towards the cloud computing model and that the benefits may be substantial
(Gartner Hype-Cycle, 2012). However, as the shape of the cloud computing is
emerging and developing rapidly both conceptually and in reality, the
legal/contractual, economic, service quality, interoperability, security and
privacy issues still pose significant challenges. In this chapter, we describe
various service and deployment models of cloud computing and identify major
challenges. In particular, we discuss three critical challenges: regulatory,
security and privacy issues in cloud computing. Some solutions to mitigate
these challenges are also proposed along with a brief presentation on the
future trends in cloud computing deployment.


title: Quantum discord of ensemble of quantum states

abstract:
  We highlight an information-theoretic meaning of quantum discord as the gap
between the ac- cessible information and the Holevo bound in the framework of
ensemble of quantum states. This complementary relationship implies that a
large amount of pre-existing arguments about the evaluation of quantum discord
can be directly applied to the accessible information and vice versa. For an
ensemble of two pure qubit states, we show that one can evade the optimization
problem with the help of the Koashi-Winter relation. Further, for the general
case (two mixed qubit states), we recover the main results presented by Fuchs
and Caves [Phys. Rev. Lett. 73, 3047 (1994)], but totally from the perspective
of quantum discord. Following this line of thought, we also investigate the
geometric discord as an indicator of quantumness of ensembles in detail.
Finally, we give an example to elucidate the difference between quantum discord
and geometric discord with respect to optimal measurement strategies.


title:
Stochastic Modeling of Large-Scale Solid-State Storage Systems:
  Analysis, Design Tradeoffs and Optimization

abstract:
  Solid state drives (SSDs) have seen wide deployment in mobiles, desktops, and
data centers due to their high I/O performance and low energy consumption. As
SSDs write data out-of-place, garbage collection (GC) is required to erase and
reclaim space with invalid data. However, GC poses additional writes that
hinder the I/O performance, while SSD blocks can only endure a finite number of
erasures. Thus, there is a performance-durability tradeoff on the design space
of GC. To characterize the optimal tradeoff, this paper formulates an
analytical model that explores the full optimal design space of any GC
algorithm. We first present a stochastic Markov chain model that captures the
I/O dynamics of large-scale SSDs, and adapt the mean-field approach to derive
the asymptotic steady-state performance. We further prove the model convergence
and generalize the model for all types of workload. Inspired by this model, we
propose a randomized greedy algorithm (RGA) that can operate along the optimal
tradeoff curve with a tunable parameter. Using trace-driven simulation on
DiskSim with SSD add-ons, we demonstrate how RGA can be parameterized to
realize the performance-durability tradeoff.


title:
First demonstration of THGEM/GAPD-matrix optical readout in two-phase
  Cryogenic Avalanche Detector in Ar

abstract:
  The multi-channel optical readout of a THGEM multiplier coupled to a matrix
of 3x3 Geiger-mode APDs (GAPDs) was demonstrated in a two-phase Cryogenic
Avalanche Detector (CRAD) in Ar. The GAPDs recorded THGEM-hole avalanches in
the Near Infrared (NIR). At an avalanche charge gain of 160, the yield of the
combined THGEM/GAPD-matrix multiplier amounted at ~80 photoelectrons per 20 keV
X-ray absorbed in the liquid phase. A spatial resolution of 2.5 mm (FWHM) has
been measured for the impinging X-rays. This technique has potential
applications in coherent neutrino-nucleus scattering and dark matter search
experiments.


title: Warings problem for fields

abstract:
  Denote by P(K, k) the members of the field K which are sums of kth powers of
field elements, by P+(K, k) the set of members of K which are sums of kth
powers of totally positive elements of K. We are interested in deciding whether
or not there exist integers w(K, k) and g(K, k) such that: a in P(K, k) implies
that a is the sum of at most w(K, k) kth powers; a in P+(K, k) implies that a
is the sum of at most g(K, k) totally positive kth powers. We will show that if
w(K, 2) is finite and provided that the kth powers are dense (in a sense
described explicitly in theorem 3) in K, then w(K, k) is also finite for k > 2.
The proofs are constructive, but the implied upper bounds for w(K, k) are
large. This is to be expected since the method of proof does not use any deep
arithmetical or algebraic properties of the field K.


title: The CH(G) Index as a New Criterion for Selecting Red Giant Stars

abstract:
  We have measured the CH G band (CH(G)) index for evolved stars in the
globular cluster M3 based on the Sloan Digital Sky Survey (SDSS) spectroscopic
survey. It is found that there is a useful way to select red giant branch (RGB)
stars from the contamination of other evolved stars such as asymptotic giant
branch (AGB) and red horizontal branch (RHB) stars by using the CH(G) index
versus (g-r) diagram if the metallicity is known from the spectra. When this
diagram is applied to field giant stars with similar metallicity, we establish
a calibration of CH(G)=1.625(g-r)-1.174(g-r)^2-0.934. This method is confirmed
by stars with [Fe/H]~2.3 where spectra of member stars in globular clusters M15
and M92 are available in the SDSS database. We thus extend this kind of
calibration to every individual metallicity bin ranging from [Fe/H] ~ -3.0 to
[Fe/H] ~ 0.0 by using field red giant stars with 0.4 < (g-r) < 1.0. The
metallicity-dependent calibrations give CH(G) =1.625(g-r)-1.174(g-r)^2+
0.060[Fe/H]-0.830 for -3.0 < [Fe/H] <-1.2 and
CH(G)=0.953(g-r)-0.655(g-r)^2+0.060[Fe/H]-0.650 for -1.2 < [Fe/H] < 0.0. The
calibrations are valid for the SDSS spectroscopic data set, and they cannot be
applied blindly to other data sets. With the two calibrations, a significant
number of the contaminating stars (AGB and RHB stars) were excluded and thus a
clear sample of red giant stars is obtained by selecting stars within 0.05 mag
of the calibration. The sample is published online and it is expected that this
large and clean sample of RGB stars will provide new information on the
formation and evolution of the Galaxy.


title: The observable-state model and non-renormalizable theories

abstract:
  The aim of this work is to apply the observable-state model for the quantum
field theory of a \phi^n self- interaction. We show how to obtain finite values
for the 2-point and n-point correlation functions without introducing
counterterms in the Lagrangian. Also, we show how to obtain the renormalization
group equation for the mass and the coupling constant. Finally, we found the
dependence of the coupling constant with the energy scale and we discuss the
validity of the observable-state model in terms of the projection procedure.


title: A quantum cloning bound and application to quantum key distribution

abstract:
  We introduce a quantum cloning bound which we apply to a straightforward and
relatively direct security proof of the prepare-and-measure Bennett-Brassard
1984 (BB84) quantum key distribution (QKD) protocol against collective attacks.
The approach we propose is able to handle the practical problem of source and
detector alignment imprecisions in a simple way. Specifically, we derive a
keyrate bound for a BB84 implementation in which Alice's source emits four
given but arbitrary pure states, where the usual equivalence between
prepare-and-measure and entanglement-based QKD no longer applies. Our result is
similar to a keyrate derived by Mar{\o}y et. al. [Phys. Rev. A 82, 032337
(2010)] and generally an improvement over the keyrate derivable from the
entropic uncertainty relation in situations where it applies. We also provide a
stronger result for a source emitting arbitrary qubit states, and a further
improved result if the detector is additionally assumed two dimensional.


title: Create Dirac Cones in Your Favorite Materials

abstract:
  Realization of conically linear dispersion, termed as Dirac cones, has
recently opened up exciting opportunities for high-performance devices that
make use of the peculiar transport properties of the massless carriers. A good
example of current fashion is the heavily studied graphene, a single atomic
layered graphite. It not only offers a prototype of Dirac physics in the field
of condensed matter and materials science, but also provides a playground of
various exotic phenomena. In the meantime, numerous routes have been attempted
to search for the next "graphene". Despite these efforts, to date there is
still no simple guideline to predict and engineer such massless particles in
materials. Here, we propose a theoretical recipe to create Dirac cones into
anyone's favorite materials. The method allows to tailor the properties, such
as anisotropy and quantity, in any effective one-band two-dimensional lattice.
We demonstrate the validity of our theory with two examples on the square
lattice, an "unlikely" candidate hosting Dirac cones, and show that a
graphene-like low-energy electronic structure can be realized. The proposed
recipe can be applied in real materials via introduction of vacancy,
substitution or intercalation, and also extended to photonic crystal, molecular
array, and cold atoms systems.


title:
Poseidon: Mitigating Interest Flooding DDoS Attacks in Named Data
  Networking

abstract:
  Content-Centric Networking (CCN) is an emerging networking paradigm being
considered as a possible replacement for the current IP-based host-centric
Internet infrastructure. In CCN, named content becomes a first-class entity.
CCN focuses on content distribution, which dominates current Internet traffic
and is arguably not well served by IP. Named-Data Networking (NDN) is an
example of CCN. NDN is also an active research project under the NSF Future
Internet Architectures (FIA) program. FIA emphasizes security and privacy from
the outset and by design. To be a viable Internet architecture, NDN must be
resilient against current and emerging threats. This paper focuses on
distributed denial-of-service (DDoS) attacks; in particular we address interest
flooding, an attack that exploits key architectural features of NDN. We show
that an adversary with limited resources can implement such attack, having a
significant impact on network performance. We then introduce Poseidon: a
framework for detecting and mitigating interest flooding attacks. Finally, we
report on results of extensive simulations assessing proposed countermeasure.


title: Evidence for accretion rate change during type I X-ray bursts

abstract:
  The standard approach for time-resolved X-ray spectral analysis of
thermonuclear bursts involves subtraction of the pre-burst emission as
background. This approach implicitly assumes that the persistent flux remains
constant throughout the burst. We reanalyzed 332 photospheric radius expansion
bursts observed from 40 sources by the Rossi X-ray Timing Explorer, introducing
a multiplicative factor $f_a$ to the persistent emission contribution in our
spectral fits. We found that for the majority of spectra the best-fit value of
$f_a$ is significantly greater than 1, suggesting that the persistent emission
typically increases during a burst. Elevated $f_a$ values were not found solely
during the radius expansion interval of the burst, but were also measured in
the cooling tail. The modified model results in a lower average value of the
$\chi^2$ fit statistic, indicating superior spectral fits, but not yet to the
level of formal statistical consistency for all the spectra.
  We interpret the elevated $f_a$ values as an increase of the mass accretion
rate onto the neutron star during the burst, likely arising from the effects of
Poynting-Robertson drag on the disk material. We measured an inverse
correlation of $f_a$ with the persistent flux, consistent with theoretical
models of the disc response. We suggest that this modified approach may provide
more accurate burst spectral parameters, as well as offering a probe of the
accretion disk structure.


title: Giant Radio Galaxies: I. Intergalactic Barometers

abstract:
  We present new wideband radio observations with the Australia Telescope
Compact Array of a sample of 12 giant radio galaxies. The radio observations
are part of a larger radio-optical study aimed at relating the radio structures
with the ambient medium on large scales. With projected linear sizes larger
than 0.7 Mpc, these objects are ideal candidates for the study of the Warm-Hot
Intergalactic Medium (WHIM). The sample includes sources with sizes spanning
0.8 to 3.2 Mpc and total powers of 1.2*10^24 to 4.0*10^26 W Hz^-1 at 2.1 GHz.
Redshifts were limited to z<0.15 to permit spectroscopic observations of the
hosts and neighbouring galaxies, which were obtained using the AAOmega
spectrograph on the Anglo-Australian Telescope. We derive lobe energy densities
from the radio observations via equipartition arguments. The inferred pressures
in the lobes of the giant radio sources, which range from 1.1*10^-15 to
2.0*10^-14 Pa (80 to 1500 cm^-3 K), are lower than previously inferred from
X-ray observations of dense filaments. Comparison with the OverWhelmingly Large
Simulations (OWLS) suggests that the WHIM in pressure balance with the radio
lobes has a temperature in excess of ~10^6.5 K or a particle overdensity in the
range 50 to 500. This study highlights the capability of next generation
surveys, such as the Evolutionary Map of the Universe (EMU) survey with the
Australian Square Kilometre Array Pathfinder (ASKAP), to study populations of
giant radio sources at lower surface brightness and thereby discriminate
between models for the cosmological evolution of the intergalactic medium and
examine the validity of cosmological hydrodynamical simulations.


title: Congruences for the $k$ dots bracelet partition functions

abstract:
  By finding the congruent relations between the generating function of the 5
dots bracelet partitions and that of the 5-regular partitions, we get some new
congruences modulo 2 for the 5 dots bracelet partition function. Moreover, for
a given prime $p$, we study the arithmetic properties modulo $p$ of the $k$
dots bracelet partitions.


title: Geometric interpretation of the geometric discord

abstract:
  We investigate the level surfaces of geometric measure of quantum discord,
and provide a pictorial interpretation of geometric discord for Bell-diagonal
states. We have observed its nonanalytic behavior under decoherence employing
this approach and interestingly found if we expect geometric discord to remain
constant under phase-flip channel for a finite period, the initial state must
be separable. Besides, this geometric understanding can be applied to verify
the hierarchical relationships between geometric discord and the original one.
The present work makes us conjecture that the incompatibility of these two
definitions may originate from the discrepancy of the geometric structures of
them.


title:
Entanglement Entropy in Holographic P-Wave Superconductor/Insulator
  Model

abstract:
  We continue our study of entanglement entropy in the holographic
superconducting phase transitions. In this paper we consider the holographic
p-wave superconductor/insulator model, where as the back reaction increases,
the transition is changed from second order to first order. We find that unlike
the s-wave case, there is no additional first order transition in the
superconducting phase. We calculate the entanglement entropy for two strip
geometries. One is parallel to the super current, and the other is orthogonal
to the super current. In both cases, we find that the entanglement entropy
monotonically increases with respect to the chemical potential.


title: Thermodynamics of Quantum Isolated Horizons with model Hamiltonians

abstract:
  Following a recent proposal, we consider the most general structure possible
for the Hamiltonian operator associated with the Quantum Isolated Horizon(QIH)
with explanations of the underlying physical motivations. An extensive
thermodynamic analysis with this model Hamiltonian is presented. Considering
{\it fixed} number of punctures, the canonical partition function can now be
written in the usual energy ensemble. Arguing that the known classical results
must follow in the correspondence limit (viz. the equilibrium temperature as
observed by a local observer) the model is fixed, yielding the energy spectrum
of the QIH.


title:
Bell violation versus geometric measure of quantum discord and their
  dynamical behavior

abstract:
  Motivated by recent numerous works on the interplay among various measures of
quantum correlations, we aim to investigate the relationship between the
violation of Clauser-Horne-Shimony-Holt (CHSH) Bell inequality and geometric
measure of quantum discord for two-qubit systems. Exact lower and upper bounds
of Bell violation versus geometric discord are obtained for a specific and
significant class of states, Bell diagonal states, and the respective states
which suffice those bounds are also characterized. The dynamical behavior of
these two quantifiers is carefully analyzed in the presence of decoherence,
including Markovian, non-Markovian, and non-back-action quantum environments.
The results suggest that Bell violation is closely related to geometric
discord, like its relationship with other entanglement monotones.


title: Charge ordering in the intermediate valence magnet YbPd

abstract:
  An x-ray diffraction study reveals the charge ordering structure in an
intermediate valence magnet YbPd with a CsCl-structure. The valence of the Yb
ions forms an incommensurate structure, characterized by the wavevector (+-0.07
+-0.07 1/2) below 130 K. At 105 K, the incommensurate structure turns into a
commensurate structure, characterized by the wavevector (0 0 1/2). Based on the
resonant x-ray diffraction spectra of the superlattice reflections, the
valences of the Yb ions below 105 K are found to be 3+ and 2.6+. The origin of
the long wavelength modulation is discussed with the aid of an Ising model
having the second nearest neighbor interaction.


title: Energy spectrum of black holes : a new view

abstract:
  Energy of a black hole is usually quantized by invoking some area
quantization scheme after expressing the energy in terms of the horizon area.
However, in this approach one has to quantize the local and asymptotic energy
of the black hole separately and the two results do not manifest any physical
correspondence with each other. Here, as opposed to this practice, we find the
unique energy spectrum of black holes by adopting a top-down approach. The
physical links among the underlying quantum theory, statistical mechanics and
thermodynamics of the black hole horizon play the central role in determining
the energy spectrum. The energy spectrum that we obtain, explicitly reveals the
correspondence between asymptotic and local observations through the presence
of the surface gravity of the horizon as a parameter in the spectrum, rather
than being expressed as a function of area and consequently getting quantized
in the usual approach. Thus, our result presents a new view as far as black
hole energy quantization is concerned. The calculations are performed using the
quantum geometric description of black hole horizons as laid down by loop
quantum gravity.


title:
Spline Collocation Method for Nonlinear Multi-Term Fractional
  Differential Equation

abstract:
  We study an approximation method to solve nonlinear multi-term fractional
differential equations with initial conditions or boundary conditions. First,
we transform the nonlinear multi-term fractional differential equations with
initial conditions and boundary conditions to nonlinear fractional integral
equations and consider the relations between them. We present a Spline
Collocation Method and prove the existence, uniqueness and convergence of
approximate solution as well as error estimation. The approximate solution of
fractional differential equation is obtained by fractional integration of the
approximate solution for fractional integral equation.


title:
Preserving Problem of Local Boundedness of Hamiltonian Dynamical Systems
  by Symplectic Discretization

abstract:
  We have researched the condition for symplectic discretization to preserve
local boundedness for the space of 2-dimensional Hamiltonian dynamical systems
in this paper.


title:
Genomic Sequence Diversity and Population Structure of Saccharomyces
  cerevisiae Assessed by RAD-seq

abstract:
  The budding yeast Saccharomyces cerevisiae is important for human food
production and as a model organism for biological research. The genetic
diversity contained in the global population of yeast strains represents a
valuable resource for a number of fields, including genetics, bioengineering,
and studies of evolution and population structure. Here, we apply a
multiplexed, reduced genome sequencing strategy (known as RAD-seq) to genotype
a large collection of S. cerevisiae strains, isolated from a wide range of
geographical locations and environmental niches. The method permits the
sequencing of the same 1% of all genomes, producing a multiple sequence
alignment of 116,880 bases across 262 strains. We find diversity among these
strains is principally organized by geography, with European, North American,
Asian and African/S. E. Asian populations defining the major axes of genetic
variation. At a finer scale, small groups of strains from cacao, olives and
sake are defined by unique variants not present in other strains. One
population, containing strains from a variety of fermentations, exhibits high
levels of heterozygosity and mixtures of alleles from European and Asian
populations, indicating an admixed origin for this group. In the context of
this global diversity, we demonstrate that a collection of seven strains
commonly used in the laboratory encompasses only one quarter of the genetic
diversity present in the full collection of strains, underscoring the
relatively limited genetic diversity captured by the current set of lab
strains. We propose a model of geographic differentiation followed by
human-associated admixture, primarily between European and Asian populations
and more recently between European and North American populations. The large
collection of genotyped yeast strains characterized here will provide a useful
resource for the broad community of yeast researchers.


title:
Investigation on Bifurcation of Map Satisfying Condition of Periodic
  Doubling Bifurcation

abstract:
  In this paper, we consider sufficient conditions for an invariant double
circle to occur in a one parameter discrete dynamical systems on a cylinder.


title:
The Impact of Bound Stellar Orbits and General Relativity on the
  Temporal Behavior of Tidal Disruption Flares

abstract:
  We have carried out general relativistic particle simulations of stars
tidally disrupted by massive black holes. When a star is disrupted in a bound
orbit with moderate eccentricity instead of a parabolic orbit, the temporal
behavior of the resulting stellar debris changes qualitatively. The debris is
initially all bound, returning to pericenter in a short time ~ the original
stellar orbital timescale. The resulting fallback rate can thus be much higher
than the Eddington rate. Furthermore if the star is disrupted close to the
hole, in a regime where general relativity is important, the stellar and debris
orbits display general relativistic precession. Apsidal precession can make the
debris stream cross itself after several orbits, likely leading to fast debris
energy dissipation. If the star is disrupted in an inclined orbit around a
spinning hole, nodal precession reduces the probability of self-intersection,
and circularization may take many dynamical timescales, delaying the onset of
flare activity. An examination of the particle dynamics suggests that
quasi-periodic flares with short durations, produced when the center of the
tidal stream passes pericenter, may occur in the early-time light curve. The
late-time light curve may still show power-law behavior which is generic to
disk accretion processes. The detection triggers for future surveys should be
extended to capture such "non-standard" short-term flaring activity before the
event enters the asymptotic decay phase, as this activity is likely to be more
sensitive to physical parameters such as the black hole spin.


title:
A Study on the Pointwise Time-Space Estimates of Fundamental Solution
  for Higher Order Schr\odinger Equation Whose Symbol Function is One Kind of
  Degenerate Polynomial

abstract:
  In this paper we investigated the point-wise time-space estimates of the
fundamental solution for higher order Schr\"odinger equation. These estimates
improve the result of Yao [2] and generalize the one of Cui [1].


title:
The State of the Art Recognize in Arabic Script through Combination of
  Online and Offline

abstract:
  Handwriting recognition refers to the identification of written characters.
Handwriting recognition has become an acute research area in recent years for
the ease of access of computer science. In this paper primarily discussed
On-line and Off-line handwriting recognition methods for Arabic words which are
often used among then across the Middle East and North Africa People. Arabic
word online handwriting recognition is a very challenging task due to its
cursive nature. Because of the characteristic of the whole body of the Arabic
script, namely connectivity between the characters, thereby the segmentation of
An Arabic script is very difficult. In this paper we introduced an Arabic
script multiple classifier system for recognizing notes written on a Starboard.
This Arabic script multiple classifier system combines one off-line and on-line
handwriting recognition systems. The Arabic script recognizers are all based on
Hidden Markov Models but vary in the way of preprocessing and normalization. To
combine the Arabic script output sequences of the recognizers, we incrementally
align the word sequences using a norm string matching algorithm. The Arabic
script combination we could increase the system performance over the excellent
character recognizer by about 3%. The proposed technique is also the necessary
step towards character recognition, person identification, personality
determination where input data is processed from all perspectives.


title:
Asynchronous Cellular Operations on Gray Images Extracting Topographic
  Shape Features and Their Relations

abstract:
  A variety of operations of cellular automata on gray images is presented. All
operations are of a wave-front nature finishing in a stable state. They are
used to extract shape descripting gray objects robust to a variety of pattern
distortions. Topographic terms are used: "lakes", "dales", "dales of dales". It
is shown how mutual object relations like "above" can be presented in terms of
gray image analysis and how it can be used for character classification and for
gray pattern decomposition. Algorithms can be realized with a parallel
asynchronous architecture. Keywords: Pattern Recognition, Mathematical
Morphology, Cellular Automata, Wave-front Algorithms, Gray Image Analysis,
Topographical Shape Descriptors, Asynchronous Parallel Processors, Holes,
Cavities, Concavities, Graphs.


title:
The effect of channel decoherence on entangled coherent states: A
  theoretical analysis

abstract:
  We analyse decoherence properties of entangled coherent states (ECSs) due to
channel losses, and compare to the performance of bi-photon Bell states. By
employing the concept of "entanglement of formation" (EOF), the degradation of
fidelity and degree of entanglement are calculated. Two situations are
considered: (1) asymmetric and (2) symmetric noise channel. In the first case,
only the lower bound of EOF is given. However, in the latter case, we have
obtained an explicit expression of concurrence (and then EOF) and found
surprisingly our result is just incompatible with that of [Phys. Rev. A
\textbf{82}, (2010) 062325] in the limit of $\alpha\rightarrow0$. We
demonstrate that entangled coherent states with sufficient small amplitudes are
more robust against channel decoherence than biphoton entangled states in both
cases.


title: Interplay between Algebraic Groups, Lie Algebras and Operator Ideals

abstract:
  In the framework of operator theory, we investigate a close Lie theoretic
relationship between all operator ideals and certain classical groups of
invertible operators that can be described as the solution sets of certain
algebraic equations, hence can be regarded as infinite-dimensional linear
algebraic groups. Historically, this has already been done for only the
complete-norm ideals; in that case one can work within the framework of the
well-known Lie theory for Banach-Lie groups. That kind of Lie theory is not
applicable for arbitrary operator ideals, so we needed to find a new approach
for dealing with the general situation. The simplest instance of the
aforementioned relationship is provided by the Lie algebra
$\ug_{\Ic}(\Hc)=\{X\in\Ic\mid X^*=-X\}$ associated with the group
$\U_{\Ic}(\Hc)=\U(\Hc)\cap(\1+\Ic)$ where $\Ic$ is an arbitrary operator ideal
in $\Bc(\Hc)$ and $\U(\Hc)$ is the full group of unitary operators. We
investigate the Cartan subalgebras (maximal abelian self-adjoint subalgebras)
of $\ug_{\Ic}(\Hc)$ for $\{0\}\subsetneqq\Ic\subsetneqq\Bc(\Hc)$, and obtain an
uncountably many $\U_{\Ic}(\Hc)$-conjugacy classes of these Cartan subalgebras.
The cardinality proof will be given in a follow up paper \cite{BPW13} and
stands in contrast to the $\U(\Hc)$-uniqueness work of de la Harpe
\cite{dlH72}.


title: Tree-size complexity of multiqubit states

abstract:
  Complexity is often invoked alongside size and mass as a characteristic of
macroscopic quantum objects. In 2004, Aaronson introduced the \textit{tree
size} (TS) as a computable measure of complexity and studied its basic
properties. In this paper, we improve and expand on those initial results. In
particular, we give explicit characterizations of a family of states with
superpolynomial complexity $n^{\Omega(\log n)}= \mathrm{TS} =O(\sqrt{n}!)$ in
the number of qubits $n$; and we show that any matrix-product state whose
tensors are of dimension $D\times D$ has polynomial complexity
$\mathrm{TS}=O(n^{\log_2 2D})$.


title:
$B(H)$-Commutators: A Historical Survey II and recent advances on
  commutators of compact operators

abstract:
  A sequel to \cite{gW05}, we address again the single commutator problem
\cite{PT71} of Pearcy and Topping: Is every compact operator a single
commutator of compact operators? by focusing on a 35 year old test question for
this posed in 1976 by the last named author and others: Are there any strictly
positive operators that are single commutators of compact operators? The latter
we settle here affirmatively with a modest modification of Anderson's
fundamental construction \cite{jA77} constructing compact operators whose
commutator is a rank one projection. Moreover we provide here a rich class of
such strictly positive operators that are commutators of compact operators and
pose a question for the rest.
  We explain also how these methods are related to the study of staircase
matrix forms, their equivalent block tri-diagonal forms, and commutator
problems. In particular, we present the original test question and solution
that led to the negative solution of the Pearcy-Topping question on whether or
not every trace class trace zero operator was a commutator (or linear
combination of commutators) of Hilbert-Schmidt operators. And we show how this
evolved from staircase form considerations along with a Larry Brown result on
trace connections to ideals \cite{lB94} which itself is at the core of
\cite[Section 7]{DFWW}.
  The omission in \cite{gW05} of this important 35 year old test question was
inadvertent and we correct that in this paper. This sequel starts where [ibid]
left off but can be read independently of [ibid].
  The present paper also has a section on self-commutator equations $[X^*,X]=A$
within the framework of some classical operator Lie algebras. That problem was
solved by Fan and Fong (1980) for the full algebra of compact operators, and we
solve it here for the complex symplectic Lie algebra of compact operators and
for complex semisimple Lie algebras.


title:
On Constructing the Value Function for Optimal Trajectory Problem and
  its Application to Image Processing

abstract:
  We proposed an algorithm for solving Hamilton-Jacobi equation associated to
an optimal trajectory problem for a vehicle moving inside the pre-specified
domain with the speed depending upon the direction of the motion and current
position of the vehicle. The dynamics of the vehicle is defined by an ordinary
differential equation, the right hand of which is given by product of control(a
time dependent fuction) and a function dependent on trajectory and control. At
some unspecified terminal time, the vehicle reaches the boundary of the
pre-specified domain and incurs a terminal cost. We also associate the
traveling cost with a type of integral to the trajectory followed by vehicle.
We are interested in a numerical method for finding a trajectory that minimizes
the sum of the traveling cost and terminal cost. We developed an algorithm
solving the value function for general trajectory optimization problem. Our
algorithm is closely related to the Tsitsiklis's Fast Marching Method and J. A.
Sethian's OUM and SLF-LLL[1-4] and is a generalization of them. On the basis of
these results, We applied our algorithm to the image processing such as
fingerprint verification.


title: Linear Difference Equations with a Transition Point at the Origin

abstract:
  A pair of linearly independent asymptotic solutions are constructed for the
second-order linear difference equation {equation*}
P_{n+1}(x)-(A_{n}x+B_{n})P_{n}(x)+P_{n-1}(x)=0, {equation*} where $A_n$ and
$B_n$ have asymptotic expansions of the form {equation*} A_n\sim
n^{-\theta}\sum_{s=0}^\infty\frac{\alpha_s}{n^s},\qquad
B_n\sim\sum_{s=0}^\infty\frac{\beta_s}{n^s}, {equation*} with $\theta\neq0$ and
$\alpha_0\neq0$ being real numbers, and $\beta_0=\pm2$. Our result hold
uniformly for the scaled variable $t$ in an infinite interval containing the
transition point $t_1=0$, where $t=(n+\tau_0)^{-\theta} x$ and $\tau_0$ is a
small shift. In particular, it is shown how the Bessel functions $J_\nu$ and
$Y_\nu$ get involved in the uniform asymptotic expansions of the solutions to
the above three-term recurrence relation. As an illustration of the main
result, we derive a uniform asymptotic expansion for the orthogonal polynomials
associated with the Laguerre-type weight $x^\alpha\exp(-q_mx^m)$, $x>0$, where
$m$ is a positive integer, $\alpha>-1$ and $q_m>0$.


title: Two unconditionally implied parameters and volatility smiles and skews

abstract:
  The paper studies estimation of parameters of diffusion market models from
historical data. The standard definition of implied volatility for these models
presents its value as an implicit function of several parameters, including the
risk-free interest rate. In reality, the risk free interest rate is unknown and
need to be forecasted, because the option price depends on its future curve.
Therefore, the standard implied volatility is {\it conditional}: it depends on
the future values of the risk free rate. We study two implied parameters: the
implied volatility and the implied average cumulative risk free interest rate.
They can be found unconditionally from a system of two equations. We found that
very simple models with random volatilities (for instance, with two point
distributions) generate various volatility smiles and skews with this approach.


title:
Unitarity and vacuum stability constraints on the couplings of color
  octet scalars

abstract:
  The recent discovery of a 126 GeV boson at the LHC will be followed by a
detailed examination of its couplings in order to determine whether this
particle is the Higgs boson of the standard model or one of many particles of
an extended scalar sector. One such extension with a rich phenomenology
consists of a color octet electroweak doublet scalar. The most general
renormalizable scalar potential contains twelve new parameters and it is
therefore desirable to constrain them. We present theoretical constraints on
these parameters obtained by requiring perturbative unitarity for two-to-two
scalar scattering amplitudes at high energy and vacuum stability.


title: A Solution to Kolmogorov-Feller Equation and Pricing of Options

abstract:
  We study the solution to Kolmogorov-Feller equation and by using it provide
pricing formulas of well known some options under jump-diffusion model.


title: Regular graphs of odd degree are antimagic

abstract:
  An antimagic labeling of a graph $G$ with $m$ edges is a bijection from
$E(G)$ to $\{1,2,\ldots,m\}$ such that for all vertices $u$ and $v$, the sum of
labels on edges incident to $u$ differs from that for edges incident to $v$.
Hartsfield and Ringel conjectured that every connected graph other than the
single edge $K_2$ has an antimagic labeling. We prove this conjecture for
regular graphs of odd degree.


title: The Radial Lemma of Strauss in the Context of Morrey Spaces

abstract:
  In this paper we consider smoothness and decay properties of radial functions
belonging to smoothness spaces related to Morrey spaces (Sobolev-Morrey spaces,
Besov-type spaces and Besov-Morrey spaces). Within this framework we prove
generalizations of the Radial Lemma of Strauss.


title:
Measurement of optical second-harmonic generation from an individual
  single-walled carbon nanotube

abstract:
  We show that optical second-harmonic generation (SHG) can be observed from
individual single-walled carbon nanotubes (SWCNTs) and, furthermore, allows
imaging of individual tubes. Detailed analysis of our results suggests that the
structural noncentrosymmetry, as required for SHG, arises from the non-zero
chiral angle of the SWCNT. SHG thus has potential as a fast, non-destructive,
and simple method for imaging of individual nanomolecules and for probing their
chiral properties. Even more, it opens the possibility to optically determine
the handedness of individual SWCNTs.


title:
Spectroscopic followup of three bright halo stars selected from SDSS and
  GALEX photometry

abstract:
  We aim to reveal the nature of the Sloan Digital Sky Survey (SDSS) stars:
SDSSJ100921.40+375233.9, SDSSJ015717.04+135535.9, and SDSSJ171422.43+283657.2,
showing apparently high NUV excesses for their g-z colors, as expected for
extremely low-metallicity stars. High resolution (R=60 000) spectra of the
stars with a wide wavelength coverage were obtained to determine their chemical
compositions with the Tull echelle spectrograph on the 2.7 m telescope at the
McDonald Observatory. We derived the spectroscopic parameters Teff =5820+-125
K, log g =3.9+-0.2, and vt =1.1+-0.5 km/s for SDSSJ100921.40+375233.9,
Teff=6250+-125 K, log g =3.7+-0.2, and vt =4.0+-0.5 km/s for
SDSSJ015717.04+135535.9, and Teff=6320+-125 K, log g =4.1+-0.3, and vt
=1.5+-0.5 km/s for SDSS J171422.43+283657.2, and elemental abundances were
computed for 21 elements for J100921 and J171422 and for 19 elements for
J015717 for the first time. We find metallicities of [Fe/H]= -1.30, -0.94, and
-0.80 for SDSSJ100921.40+375233.9, J015717.04+135535.9, and
J171422.43+283657.2, respectively. On the basis of calculated abundance ratios
for J171422.43+283657.2 and J015717.04+135535.9, we also report that these two
program stars have the expected composition of main-sequence halo turnoff
stars, but with low-alpha abundances, i.e., the [alpha/Fe] ratio is ~0.0 for
J171422.43+283657.2 and ~0.1 for J015717.04+135535.9. The latter one shows
typical halo or thick-disk alpha-element abundances, but has a substantial
rotational line broadening and vsini=40 +- 0.5 km/s.


title:
Study On Universal Lossless Data Compression by using Context Dependence
  Multilevel Pattern Matching Grammar Transform

abstract:
  In this paper, the context dependence multilevel pattern matching(in short
CDMPM) grammar transform is proposed; based on this grammar transform, the
universal lossless data compression algorithm, CDMPM code is then developed.
Moreover we get a upper bound of this algorithms' worst case redundancy among
all individual sequences of length n from a finite alphabet.


title: Time of Flight Transients in the Dipolar Glass Model

abstract:
  Using Monte Carlo simulation we investigated time of flight current
transients predicted by the dipolar glass model for a random spatial
distribution of hopping centers. Behavior of the carrier drift mobility was
studied at room temperature over a broad range of electric field and sample
thickness. A flat plateau followed by $j\propto t^{-2}$ current decay is the
most common feature of the simulated transients. Poole-Frenkel mobility field
dependence was confirmed over 5 to 200 V/$\mu$m as well as its independence of
the sample thickness. Universality of transients with respect to both field and
sample thickness has been observed. A simple phenomenological model to describe
simulated current transients has been proposed. Simulation results agree well
with the reported Poole-Frenkel slope and shape of the transients for a
prototype molecularly doped polymer.

categories: cond-mat.mtrl-sci cond-mat.dis-nn cond-mat.mes-hall physics.comp-ph


title:
Dependence of the triple-alpha process on the fundamental constants of
  nature

abstract:
  We present an ab initio calculation of the quark mass dependence of the
ground state energies of ^4He, ^8Be and ^{12}C, and of the energy of the Hoyle
state in ^{12}C. These investigations are performed within the framework of
lattice chiral Effective Field Theory. We address the sensitivity of the
production rate of carbon and oxygen in red giant stars to the fundamental
constants of nature by considering the impact of variations in the light quark
masses and the electromagnetic fine-structure constant on the reaction rate of
the triple-alpha process. As carbon and oxygen are essential to life as we know
it, we also discuss the implications of our findings for an anthropic view of
the Universe. We find strong evidence that the physics of the triple-alpha
process is driven by alpha clustering, and that shifts in the fundamental
parameters at the \simeq 2 - 3 % level are unlikely to be detrimental to the
development of life. Tolerance against much larger changes cannot be ruled out
at present, given the relatively limited knowledge of the quark mass dependence
of the two-nucleon S-wave scattering parameters. Lattice QCD is expected to
provide refined estimates of the scattering parameters in the future.


title:
Asymptotic Normality of Estimates in Flexible Seasonal Time Series Model
  with Weak Dependent Error Terms

abstract:
  In this article, we consider flexible seasonal time series models which
consist of a common trend function over periods and additive individual trend
(seasonal effect) functions. The consistency and asymptotic normality of the
local linear estimators were obtained under the $\alpha$-mixing conditions and
without specifying the error distribution. We develop these results to
consistency and asymptotic normality of local linear estimates by using central
limit theorems for flexible seasonal time series model, which error terms are
$k$-weak dependent and $\lambda$-weak dependent random variables.


title: Constraints on Unparticles from $B_s\to\mu^+\mu^-$

abstract:
  Unparticle contributions to the recently measured decay mode
$B_s\to\mu^+\mu^-$ are analyzed. We consider only the scalar unparticles
because vector unparticles are expected to provide negligible contributions.
Assuming that the relevant coupling constants are real, we present allowed
regions of coupling constants and the scaling dimension of the scalar
unparticle. While the measured value of the branching ratio is very close to
the standard model predictions, one cannot exclude the possible contributions
from unparticles.


title:
On the uniqueness of solutions to quadratic BSDEs with convex generators
  and unbounded terminal conditions: the critical case

abstract:
  In [3], the authors proved that uniqueness holds among solutions whose
exponentials are $L^p$ with $p$ bigger than a constant $\gamma$
($p\textgreater{}\gamma$). In this paper, we consider the critical case:
$p=\gamma$. We prove that the uniqueness holds among solutions whose
exponentials are $L^\gamma$ under the additional assumption that the generator
is strongly convex.


title:
3D Residual Stress Field in Arteries: Novel Inverse Method Based on
  Optical Full-field Measurements

abstract:
  Arterial tissue consists of multiple structurally important constituents that
have individual material properties and associated stress-free configurations
that evolve over time. This gives rise to residual stresses contributing to the
homoeostatic state of stress in vivo as well as adaptations to perturbed loads,
disease or injury. The existence of residual stresses in an intact but
load-free excised arterial segment suggests compressive and tensile stresses,
respectively, in the inner and outer walls. Accordingly, an artery ring springs
open into a sector after a radial cut. The measurement of the opening angle is
commonly used to deduce the residual stresses, which are the stresses required
to close back the ring. The opening angle method provides an average estimate
of circumferential residual stresses but it gives no information on local
distributions through the thickness and along the axial direction. To address
this lack, a new method is proposed in this article to derive maps of residual
stresses using an approach based on the contour method. A piece of freshly
excised tissue is carefully cut into the specimen, and the local distribution
of residual strains and stresses is determined from whole-body digital image
correlation measurements using an inverse approach based on a finite element
model.


title: A general form of the weak maximum principle and some applications

abstract:
  The aim of this paper is to introduce new forms of the weak and Omori-Yau
maximum principles for linear operators, notably for trace type operators, and
show their usefulness, for instance, in the context of PDE's and in the theory
of hypersurfaces. In the final part of the paper we consider a large class of
non-linear operators and we show that our previous results can be appropriately
generalized to this case.


title:
Supplementary information to: Forces between a partially coherent
  fuctuating source and a magnetodielectric particle

abstract:
  This is the supplementary information to arXiv:1303.4545v1 [physics.optics]
19 Mar 2013 in which we address the forces exerted by the electromagnetic field
emitted by a planar uctuating source on dielectric particles that have arose
much interest because of their recently shown magnetodielectric behavior.


title: Leptons and Quarks from a Discrete Flavor Symmetry

abstract:
  We propose a new model of leptons and quarks based on the discrete flavor
symmetry $T'$, the double covering of $A_4$, in which the hierarchies of
charged fermion masses and the mildness of neutrino masses are responsible for
Higgs scalars. After spontaneous breaking of flavor symmetry, with the
constraint of renormalizability in the Lagrangian, the leptons have $m_{e}=0$
and the quarks have the Cabibbo-Kobayashi-Maskawa (CKM) mixing angles
$\theta^{q}_{12}=13^{\circ}, \theta^{q}_{23}=0^{\circ}$ and
$\theta^{q}_{13}=0^{\circ}$. Thus, certain effective dimension-5 operators are
introduced, which induce $m_{e}\neq0$ and lead the quark mixing matrix to the
CKM one in form. On the other hand, the neutrino Lagrangian still keeps
renormalizability. For completeness, we show numerical analysis: in the lepton
sector, only normal mass hierarchy is permitted within $3\sigma$ experimental
bounds with the prediction of both large deviations from maximality in the
atmospheric mixing angle $\theta_{23}$ and the measured values of reactor
angle. So, future precise measurements of $\theta_{23}$, whether
$\theta_{23}\rightarrow45^{\circ}$ or
$|\theta_{23}-45^{\circ}|\rightarrow5^{\circ}$, will either exclude or favor
our model. Together with it, our model makes predictions for the Dirac CP
phase, which is almost compatible with the global analysis in $1\sigma$
experimental bounds. Moreover, we show the effective mass $|m_{ee}|$ measurable
in neutrinoless double beta decay to be in the range
$0.04\lesssim|m_{ee}|[eV]<0.11$, which can be tested in near future neutrino
experiments.


title:
The quasi-dark state and quantum interference in Jaynes-Cummings model
  with a common bath

abstract:
  Within the capacity of current experiments, we design a composite atom-cavity
system with a common bath, in which the decay channels of the atom and the
cavity mode interfere with each other. When the direct atom-cavity coupling is
absent, the system can be trapped in a quasi-dark state (the coherent
superposition of excited states for the atom and the cavity mode) without decay
even in the presence of the bath. When the atom directly couples with the
cavity, the largest decay rate of the composite system will surpass the sum of
the two subsystems while the smallest decay rate may achieve 0. This is
manifested in the transmission spectrum, where the vacuum Rabi splitting shows
an obvious asymmetric character.


title:
Estimation of the concentration of deep traps in organic photoconductors
  using two-photon absorption

abstract:
  Typically, amorphous organic materials contain high density of traps. Traps
hinder charge transport and, hence, affect various working parameters of
organic electronic devices. In this paper we suggest a simple but reliable
method for the estimation of the concentration of deep traps (traps that keep
carriers for a time much longer than the typical transport time of the device).
The method is based on the measurement of the dependence of the total charge,
collected at the electrode, on the total initial charge, uniformly generated in
the transport layer under the action of a light pulse. Advantages and
limitations of the method are discussed and an experimental example of the
estimation of the density of deep traps in photoconductive organic material
poly(2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene (MEH-PPV) is
provided.


title:
A Robust Rapid Approach to Image Segmentation with Optimal Thresholding
  and Watershed Transform

abstract:
  This paper describes a novel method for partitioning image into meaningful
segments. The proposed method employs watershed transform, a well-known image
segmentation technique. Along with that, it uses various auxiliary schemes such
as Binary Gradient Masking, dilation which segment the image in proper way. The
algorithm proposed in this paper considers all these methods in effective way
and takes little time. It is organized in such a manner so that it operates on
input image adaptively. Its robustness and efficiency makes it more convenient
and suitable for all types of images.


title:
The Identification of Thresholds and Time Delay in Self-Exciting
  Threshold AR Model by Wavelet

abstract:
  In this paper we studied about the wavelet identification of the thresholds
and time delay for more general case without the constraint that the time delay
is smaller than the order of the model. Here we composed an empirical wavelet
from the SETAR (Self-Exciting Threshold Autoregressive) model and identified
the thresholds and time delay in the model using it.

categories: math-ph math.MP math.PR math.ST q-fin.ST stat.TH


title: Multiparty Quantum Remote Control

abstract:
  This paper proposes a multiparty quantum remote control (MQRC) protocol,
which allows several controllers to perform remote operations independently on
a target state based on a shared entanglement of Greenberger-Home-Zeilinger
(GHZ) state.


title:
Does query performance optimization lead to energy efficiency? A
  comparative analysis of energy efficiency of database operations under
  different workload scenarios

abstract:
  With the continuous increase of online services as well as energy costs,
energy consumption becomes a significant cost factor for the evaluation of data
center operations. A significant contributor to that is the performance of
database servers which are found to constitute the backbone of online services.
From a software approach, while a set of novel data management technologies
appear in the market e.g. key-value based or in-memory databases, classic
relational database management systems (RDBMS) are still widely used. In
addition from a hardware perspective, the majority of database servers is still
using standard magnetic hard drives (HDDs) instead of solid state drives (SSDs)
due to lower cost of storage per gigabyte, disregarding the performance boost
that might be given due to high cost.
  In this study we focus on a software based assessment of the energy
consumption of a database server by running three different and complete
database workloads namely TCP-H, Star Schema Benchmark -SSB as well a modified
benchmark we have derived for this study called W22. We profile the energy
distribution among the ost important server components and by using different
resource allocation we assess the energy consumption of a typical open source
RDBMS (PostgreSQL) on a standard server in relation with its performance
(measured by query time).
  Results confirm the well-known fact that even for complete workloads,
optimization of the RDBMS results to lower energy consumption.


title: $\mathrm{Pin}^-(2)$-monopole invariants

abstract:
  We introduce a diffeomorphism invariant of $4$-manifolds, the
$\mathrm{Pin}^-(2)$-monopole invariant, defined by using the
$\mathrm{Pin}^-(2)$-monopole equations. We compute the invariants of several
$4$-manifolds, and prove gluing formulae. By using the invariants, we construct
exotic smooth structures on the connected sum of an elliptic surface $E(n)$
with arbitrary number of the $4$-manifolds of the form of $S^2\times\Sigma$ or
$S^1\times Y$ where $\Sigma$ is a compact Riemann surface with positive genus
and $Y$ is a closed $3$-manifold. As another application, we give an estimate
of the genus of surfaces embedded in a $4$-manifold $X$ representing a class
$\alpha\in H_2(X;l)$, where $l$ is a local coefficient on $X$.


title: Estimation of the lead-lag parameter from non-synchronous data

abstract:
  We propose a simple continuous time model for modeling the lead-lag effect
between two financial assets. A two-dimensional process $(X_t,Y_t)$ reproduces
a lead-lag effect if, for some time shift $\vartheta\in \mathbb{R}$, the
process $(X_t,Y_{t+\vartheta})$ is a semi-martingale with respect to a certain
filtration. The value of the time shift $\vartheta$ is the lead-lag parameter.
Depending on the underlying filtration, the standard no-arbitrage case is
obtained for $\vartheta=0$. We study the problem of estimating the unknown
parameter $\vartheta\in \mathbb{R}$, given randomly sampled non-synchronous
data from $(X_t)$ and $(Y_t)$. By applying a certain contrast optimization
based on a modified version of the Hayashi-Yoshida covariation estimator, we
obtain a consistent estimator of the lead-lag parameter, together with an
explicit rate of convergence governed by the sparsity of the sampling design.


title: The Quest for the Most Spherical Bubble

abstract:
  We describe a recently realized experiment producing the most spherical
cavitation bubbles today. The bubbles grow inside a liquid from a point-plasma
generated by a nanosecond laser pulse. Unlike in previous studies, the laser is
focussed by a parabolic mirror, resulting in a plasma of unprecedented
symmetry. The ensuing bubbles are sufficiently spherical that the hydrostatic
pressure gradient caused by gravity becomes the dominant source of asymmetry in
the collapse and rebound of the cavitation bubbles. To avoid this natural
source of asymmetry, the whole experiment is therefore performed in
microgravity conditions (ESA, 53rd and 56th parabolic flight campaign).
Cavitation bubbles were observed in microgravity (~0g), where their collapse
and rebound remain spherical, and in normal gravity (1g) to hyper-gravity
(1.8g), where a gravity-driven jet appears. Here, we describe the experimental
setup and technical results, and overview the science data. A selection of
high-quality shadowgraphy movies and time-resolved pressure data is published
online.


title:
Electric properties of supercooled water contained in cylindrical
  nanopores

abstract:
  The paper provides data on measuring electrical properties of supercooled
water in nanoporous silica MCM-41 with 3.5 nm diameter cylindrical pores, using
the methods of dielectric spectroscopy and measuring proper electrical
fluctuations at low frequencies. Occurrence of non-linear media properties at
the temperatures below -35 C was determined, which was revealed in the form of
registered cell capacity dependence on voltage amplitude in it, as well as
noise increase close to -40 C. The effects observed are supposed to be related
to the earlier predicted ferroelectric phase transition.


title: Nonlinear Spectral Singularities and Lasing Threshold Condition

abstract:
  A spectral singularity is a mathematical notion with an intriguing physical
realization in terms of certain zero-width resonances. In optics it manifests
as lasing at the threshold gain. We explore the application of their
recently-developed nonlinear generalization in the study of the effect of a
nonlinearity on the lasing threshold condition for an infinite planar slab of
gain medium. In particular, for a Kerr nonlinearity, we derive an explicit
expression for the intensity of the emitted waves from the slab and discuss the
implications of our results for the time-reversed system that acts as a
coherent perfect absorber.


title:
Statistical inference for discrete-time samples from affine stochastic
  delay differential equations

abstract:
  Statistical inference for discrete time observations of an affine stochastic
delay differential equation is considered. The main focus is on maximum
pseudo-likelihood estimators, which are easy to calculate in practice. A more
general class of prediction-based estimating functions is investigated as well.
In particular, the optimal prediction-based estimating function and the
asymptotic properties of the estimators are derived. The maximum
pseudo-likelihood estimator is a particular case, and an expression is found
for the efficiency loss when using the maximum pseudo-likelihood estimator,
rather than the computationally more involved optimal prediction-based
estimator. The distribution of the pseudo-likelihood estimator is investigated
in a simulation study. Two examples of affine stochastic delay equation are
considered in detail.


title:
Mathematical and physical meaning of the crossings of energy levels in
  ${\cal PT}-$symmetric systems

abstract:
  Unavoided crossings of the energy levels due to a variation of a real
parameter are studied. It is found that after the quantum system in question
passes through one of its energy-crossing points {\it alias} Kato's exceptional
points (EP), its physical interpretation may {\em dramatically} change even
when the crossing energies themselves do not complexify. The anomalous physical
phase-transition mechanism of the change is revealed, attributed to the
EP-related mathematics and illustrated via several exactly solvable matrix toy
models.


title:
Higher-order superintegrability of separable potentials with a new
  approach to the Post-Winternitz system

abstract:
  The higher-order superintegrability of separable potentials is studied. It is
proved that these potentials possess (in addition to the two quadratic
integrals) a third integral of higher-order in the momenta that can be obtained
as the product of powers of two particular rather simple complex functions.
Some systems related with the harmonic oscillator, as the generalized SW system
and the TTW system, were studied in previous papers; now a similar analysis is
presented for superintegrable systems related with the Kepler problem. In this
way, a new proof of the superintegrability of the Post-Winternitz system is
presented and the explicit expression of the integral is obtained. Finally, the
relations between the superintegrable systems with quadratic constants of the
motion (separable in several different coordinate systems) and the
superintegrable systems with higher-order constants of the motion are analyzed.


title: Overconvergent Eichler-Shimura isomorphisms

abstract:
  We provide a geometric Hodge-Tate map giving generic description of the
overconvergent modular symbols of some p-adic (accessible) weight k,
base-changed to C_p, in terms of overconvergent modular forms of weight k+2.


title: On factorization of elements in Pimenov algebras

abstract:
  We consider the operation of division in Pimenov algebras. We obtain
necessary and sufficient conditions for prime elements in Pimenov algebras with
a number of generators less than five. We adduce examples of the factorization
of elements in these algebras.


title: The evolution of inner disk radius with orbital phase in Circinus X-1

abstract:
  Using RXTE observations, we investigate the evolution of inner disk radius
R_in of Cir X-1 during two cycles and find obvious orbital modulation. We argue
that the modulation is attributed to its high orbital eccentricity. The disk
luminosity is inversely with the inner disk temperature kT_in, which is
ascribed to the slow increase of kT_in and, however, the rapid decrease of R_in
during the passage for the neutron star to depart from the companion star.


title: WMAP 9-year CMB estimation using sparsity

abstract:
  Recovering the Cosmic Microwave Background (CMB) from WMAP data requires
galactic foreground emissions to be accurately separated out. Most component
separation techniques rely on second order statistics such as Internal Linear
Combination (ILC) techniques. In this paper, we present a new WMAP 9-year CMB
map, with 15 arcmin resolution, which is reconstructed using a recently
introduced sparse component separation technique, coined Local Generalized
Morphological Component Analysis (LGMCA). LGMCA emphasizes on the sparsity of
the components to be retrieved in the wavelet domain. We show that although
derived from a radically different separation criterion ({i.e. sparsity), the
LGMCA-WMAP 9 map and its power spectrum are fully consistent with their more
recent estimates from WMAP 9.


title: Contextual analysis framework for bursty dynamics

abstract:
  To understand the origin of bursty dynamics in natural and social processes
we provide a general analysis framework, in which the temporal process is
decomposed into sub-processes and then the bursts in sub-processes, called
contextual bursts, are combined to collective bursts in the original process.
For the combination of sub-processes, it is required to consider the
distribution of different contexts over the original process. Based on minimal
assumptions for inter-event time statistics, we present a theoretical analysis
for the relationship between contextual and collective inter-event time
distributions. Our analysis framework helps to exploit contextual information
available in decomposable bursty dynamics.


title: On totally disconnected generalised Sierpinski carpets

abstract:
  Generalised Sierpinski carpets are planar sets that generalise the well-known
Sierpinski carpet and are defined by means of sequences of patterns. We study
the structure of the sets at the kth iteration in the construction of the
generalised carpet, for k greater than or equal to 1. Subsequently, we show
that certain families of patterns provide total disconnectedness of the
resulting generalised carpets. Moreover, analogous results hold even in a more
general setting. Finally, we apply the obtained results in order to give an
example of a totally disconnected generalised carpet with box-counting
dimension 2.


title:
Quantum Corrections to Entropy of Charged Dilatonic Black Holes in
  Arbitrary Dimensions

abstract:
  The quantum contribution of a scalar field to entropy of a dilatonic black
hole is calculated in the brick wall model by the WKB method and analyzed by a
high-temperature expansion. If the cutoff distance from the horizon approaches
zero, the leading divergent piece of entropy turns out to be proportional to
the "area" of the horizon surface (which has (N-1)-dimensional extension in
(N+1)-dimensional space-time) and independent of other properties of black
holes even in the case of general dilaton coupling. There is also qualitative
argument with the known result of subleading divergence for N=3.


title: Proton radius puzzle and large extra dimensions

abstract:
  We propose a theoretical scenario to solve the proton radius puzzle which
recently arises from the muonic hydrogen experiment. In this framework, 4 + n
dimensional theory is incorporated with modified gravity. The extra
gravitational interaction between the proton and muon at very short range
provides an energy shift which accounts for the discrepancy between
spectroscopic results from muonic and electronic hydrogen experiments. Assuming
the modified gravity is a small perturbation to the existing electromagnetic
interaction, we find the puzzle can be solved with stringent constraint on the
range of the new force. Our result not only provides a possible solution to the
proton radius puzzle but also suggest a direction to test new physics at very
small length scale.


title: Organic glasses: cluster structure of the random energy landscape

abstract:
  An appropriate model for the random energy landscape in organic glasses is a
spatially correlated Gaussian field. We calculated the distribution of the
average value of a Gaussian random field in a finite domain. The results of the
calculation demonstrate a strong dependence of the width of the distribution on
the spatial correlations of the field. Comparison with the simulation results
for the distribution of the size of the cluster indicates that the distribution
of an average field could serve as a useful tool for the estimation of the
asymptotic behavior of the distribution of the size of the clusters for "deep"
clusters where value of the field on each site is much greater than the rms
disorder. We also demonstrate significant modification of the properties of
energetic disorder in organic glasses at the vicinity of the electrode.


title: Generalized Inverse Seesaws

abstract:
  The seesaw mechanism can be generalized to a Type-III variant and a
quintuplet variant. We present two models that provide analogous
generalizations of the inverse seesaw mechanism. The first model employs a
fermion triplet F ~ (1,3,0) and requires no additional multiplets or parameters
relative to the standard inverse seesaw. We argue that, from a bottom-up
perspective, there appears to be no particular reason to preference the usual
scenario over this variant. The second model employs a fermion quintuplet F ~
(1,5,0) and requires an additional scalar S ~ (1,4,1). We also show that
minimal inverse seesaws with even larger fermionic representations are not
expected to realize naturally small neutrino masses.


title:
Quadrupolar glass as a model for charge carrier transport in nonpolar
  organic materials

abstract:
  Monte Carlo simulation of the charge carrier transport in disordered nonpolar
organic materials has been carried out. As a suitable model we considered the
model of quadrupolar glass. A general formula for the temperature and field
dependence of the mobility was suggested. A comparison with experimental data
has been carried out.

categories: cond-mat.dis-nn cond-mat.mes-hall cond-mat.mtrl-sci physics.comp-ph


title:
Challenging the nature of low energy plasmon excitations in CaC$_6$
  using electron energy-loss spectroscopy

abstract:
  The nature of low energy plasmon excitations plays an important role in
understanding the low energy electronic properties and coupling mechanism of
different superconducting compounds such as CaC$_6$. Recent ab-initio studies
predict a charge carrier intraband plasmon in keeping with a low energy
acoustic plasmon. Here, we have studied the low-energy electronic excitations
of CaC$_6$ using high-resolution electron energy-loss spectroscopy in
transmission at low temperatures. The analysis of the core-level excitations
leads to the conclusion that hybridization between graphite and calcium states
plays an essential role in this graphite intercalated compound. Regarding the
low energy plasmon excitation, we observe the formation of an intraband (charge
carrier) plasmon with a negative dispersion at about 3.5 eV in sound agreement
with the theory. Finally, a weak excitation around 1.2 eV with an almost linear
dispersion relation can be observed as predicted for an acoustic plasmon that
may mediate the superconducting coupling in CaC$_6$. However its optical limit
at ~1 eV challenges the theoretical predictions and safely rules out an
electronic superconducting coupling mechanism in CaC$_6$.


title: Parameter estimation for pair-copula constructions

abstract:
  We explore various estimators for the parameters of a pair-copula
construction (PCC), among those the stepwise semiparametric (SSP) estimator,
designed for this dependence structure. We present its asymptotic properties,
as well as the estimation algorithm for the two most common types of PCCs.
Compared to the considered alternatives, that is, maximum likelihood, inference
functions for margins and semiparametric estimation, SSP is in general
asymptotically less efficient. As we show in a few examples, this loss of
efficiency may however be rather low. Furthermore, SSP is semiparametrically
efficient for the Gaussian copula. More importantly, it is computationally
tractable even in high dimensions, as opposed to its competitors. In any case,
SSP may provide start values, required by the other estimators. It is also well
suited for selecting the pair-copulae of a PCC for a given data set.


title: Invisible decays of ultra-high energy neutrinos

abstract:
  Gamma-ray bursts (GRBs) are expected to provide a source of ultra high energy
cosmic rays, accompanied with potentially detectable neutrinos at neutrino
telescopes. Recently, IceCube has set an upper bound on this neutrino flux well
below theoretical expectation. We investigate whether this mismatch between
expectation and observation can be due to neutrino decay. We demosntrate the
phenomenological consistency and theoretical plausibility of the neutrino decay
hypothesis. A potential implication is the observability of majoron-emitting
neutrinoless double beta decay.


title:
On whether and how D-RISC and Microgrids can be kept relevant
  (self-assessment report)

abstract:
  This report lays flat my personal views on D-RISC and Microgrids as of March
2013. It reflects the opinions and insights that I have gained from working on
this project during the period 2008-2013. This report is structed in two parts:
deconstruction and reconstruction. In the deconstruction phase, I review what I
believe are the fundamental motivation and goals of the D-RISC/Microgrids
enterprise, and identify what I judge are shortcomings: that the project did
not deliver on its expectations, that fundamental questions are left
unanswered, and that its original motivation may not even be relevant in
scientific research any more in this day and age. In the reconstruction phase,
I start by identifying the merits of the current D-RISC/Microgrids technology
and know-how taken at face value, re-motivate its existence from a different
angle, and suggest new, relevant research questions that could justify
continued scientific investment.


title: Multimedia stimuli databases usage patterns: a survey report

abstract:
  Multimedia documents such as images, sounds or videos can be used to elicit
emotional responses in exposed human subjects. These stimuli are stored in
affective multimedia databases and successfully used for a wide variety of
research in affective computing, human-computer interaction and cognitive
sciences. Affective multimedia databases are simple repositories of multimedia
documents with annotated high-level semantics and affective content. Although
important all affective multimedia databases have numerous deficiencies which
impair their applicability. To establish a better understanding of how experts
use affective multimedia databases an online survey was conducted into the
subject. The survey results are statistically significant and indicate that
contemporary databases lack stimuli with rich semantic and emotional content.
73.33% of survey participants find the databases lacking at least some
important semantic or emotion content. Most of the participants consider
stimuli descriptions to be inadequate. Overall, 1-2h or more than 24h are
generally needed to construct a single stimulation sequence. Almost 84% of the
survey participants would like to use real-life videos in their research.
Experts unequivocally recognize the need for an intelligent stimuli retrieval
application that would assist them in experimentation. Almost all experts agree
such applications could be useful in their work.


title:
Extended Lagrangian Born-Oppenheimer molecular dynamics in the limit of
  vanishing self-consistent field optimization

abstract:
  We present an efficient general approach to first principles molecular
dynamics simulations based on extended Lagrangian Born-Oppenheimer molecular
dynamics in the limit of vanishing self-consistent field optimization. The
reduction of the optimization requirement reduces the computational cost to a
minimum, but without causing any significant loss of accuracy or longterm
energy drift. The optimization-free first principles molecular dynamics
requires only one single diagonalization per time step and yields trajectories
at the same level of accuracy as "exact", fully converged, Born-Oppenheimer
molecular dynamics simulations. The optimization-free limit of extended
Lagrangian Born-Oppenheimer molecular dynamics therefore represents an ideal
starting point for a robust and efficient formulation of a new generation first
principles quantum mechanical molecular dynamics simulation schemes.


title: Modular invariant partition function of critical dense polymers

abstract:
  A lattice model of critical dense polymers is solved exactly for arbitrary
system size on the torus. More generally, an infinite family of lattice loop
models is studied on the torus and related to the corresponding
Fortuin-Kasteleyn random cluster models. Starting with a cylinder, the
commuting periodic single-row transfer matrices are built from the periodic
Temperley-Lieb algebra extended by the shift operators Omega and Omega^{-1}. In
this enlarged algebra, the non-contractible loop fugacity is alpha and the
contractible loop fugacity is beta. The torus is formed by gluing the top and
bottom of the cylinder. This gives rise to a variety of non-contractible loops
winding around the torus. Because of their nonlocal nature, the standard matrix
trace does not produce the proper geometric torus. Instead, we introduce a
modified matrix trace for this purpose. This is achieved by using a
representation of the enlarged periodic Temperley-Lieb algebra with a parameter
v that keeps track of the winding of defects on the cylinder. The transfer
matrix representatives and their eigenvalues thus depend on v. The modified
trace is constructed as a linear functional on planar connectivity diagrams in
terms of matrix traces Tr_d (with a fixed number of defects d) and Chebyshev
polynomials of the first kind. For critical dense polymers, where beta=0, the
transfer matrix eigenvalues are obtained by solving a functional equation in
the form of an inversion identity. The solution depends on d and is subject to
selection rules which we prove. Simplifications occur if all non-contractible
loop fugacities are set to alpha=2 in which case the traces are evaluated at
v=1. In the continuum scaling limit, the corresponding conformal torus
partition function obtained from finite-size corrections agrees with the known
modular invariant partition function of symplectic fermions.

categories: hep-th cond-mat.stat-mech math-ph math.MP