title: Liquid meniscus friction on a wet plate: Bubbles, lamellae and foams

abstract:
  Many microfluidics devices, coating processes or diphasic flows involve the
motion of a liquid meniscus on a wet wall. This motion induces a specific
viscous force, that exhibits a non-linear dependency in the meniscus velocity.
We propose a review of the theoretical and experimental work made on this
viscous force, for simple interfacial properties. The interface is indeed
assumed either perfectly compressible (mobile interface) or perfectly
incompressible (rigid interface). We show that, in the second case, the viscous
force exerted by the wall on the meniscus is a combination of two power laws,
scaling like $Ca^{1/3}$ and $Ca^{2/3}$, with $Ca$ the capillary number. We
provide a prediction for the stress exerted on a foam sliding on a wet solid
and compare it with experimental data, for the incompressible case.


title: Magnetic monopole field exposed by electrons

abstract:
  Magnetic monopoles have provided a rich field of study, leading to a wide
area of research in particle physics, solid state physics, ultra-cold gases,
superconductors, cosmology, and gauge theory. So far, no true magnetic
monopoles were found experimentally. Using the Aharonov-Bohm effect, one of the
central results of quantum physics, shows however, that an effective monopole
field can be produced. Understanding the effects of such a monopole field on
its surroundings is crucial to its observation and provides a better grasp of
fundamental physical theory. We realize the diffraction of fast electrons at a
magnetic monopole field generated by a nanoscopic magnetized ferromagnetic
needle. Previous studies have been limited to theoretical semiclassical optical
calculations of the motion of electrons in such a monopole field. Solid state
systems like the recently studied 'spin ice' provide a constrained system to
study similar fields, but make it impossible to separate the monopole from the
material. Free space diffraction helps to understand the dynamics of the
electron-monopole system without the complexity of a solid state system. The
use of a simple object such as a magnetized needle will allow various areas of
physics to use the general dynamical effects of monopole fields without
requiring a monopole particle or specific solids which have internal
monopole-like properties. The experiment performed here shows that even without
a true magnetic monopole particle, the theoretical background on monopoles
serves as a basis for experiments and can be applied to efficiently create
electron vortices. Various predictions about angular momentum and general field
effects can readily be studied using the available equipment. This realization
provides insights for the scientific community on how to detect magnetic
monopoles in high energy collisions, cosmological processes, or novel
materials.


title:
The TRENDS High-Contrast Imaging Survey. III. A Faint White Dwarf
  Companion Orbiting HD 114174

abstract:
  The nearby Sun-like star HD 114174 exhibits a strong and persistent Doppler
acceleration indicating the presence of an unseen distant companion. We have
acquired high-contrast imaging observations of this star using NIRC2 at Keck
and report the direct detection of the body responsible for causing the
"trend". HD 114174 B has a projected separation of 692+/-9 mas (18.1 AU) and is
10.75+/-0.12 magnitudes (contrast of 5x10{-5}) fainter than its host in the
K-band, requiring aggressive point-spread function subtraction to identify. Our
astrometric time baseline of 1.4 years demonstrates physical association
through common proper motion. We find that the companion has absolute
magnitude, M_J=13.97+/-0.11, and colors, J-K= 0.12+/-0.16 mag. These
characteristics are consistent with an ~T3 dwarf, initially leading us to
believe that HD 114174 B was a substellar object. However, a dynamical analysis
that combines radial velocity measurements with available imaging data
indicates a minimum mass of m=0.260+/-0.010Msun. We conclude that HD 114174 B
must be a white dwarf. Assuming a hydrogen-rich composition, atmospheric and
evolutionary model fits yield an effective temperature Teff = 8160+/-4000 K,
surface gravity log g=8.90+/-0.02, and cooling age of t_c=3.4 Gyr, which is
consistent with the 4.7+/-2.4 Gyr host star isochronal age estimate. HD 114174
B is a benchmark object located only d=26.1 pc from the Sun. It may be studied
at a level of detail comparable to Sirius and Procyon, and used to understand
the link between the mass of white dwarf remnants with that of their
progenitors.


title:
The ordinary life of the gamma-ray emitting narrow-line Seyfert 1 galaxy
  PKS 1502+036

abstract:
  We report on multifrequency observations of the gamma-ray emitting
narrow-line Seyfert 1 galaxy PKS 1502+036 performed from radio to gamma-rays
during 2008 August-2012 November by Fermi-LAT, Swift (XRT and UVOT), OVRO,
VLBA, and VLA. No significant variability has been observed in gamma-rays, with
0.1-100 GeV flux that ranged between (3-7)x10^-8 ph/cm^2/s using 3-month time
bins. The photon index of the LAT spectrum (Gamma=2.60+/-0.06) and the apparent
isotropic gamma-ray luminosity, L(0.1-100 GeV)= 7.8x10^45 erg/s, over 51 months
are typical of a flat spectrum radio quasar. The radio spectral variability and
the one-sided structure, in addition to the observed gamma-ray luminosity,
suggest a relativistic jet with a high Doppler factor. In contrast to SBS
0846+513, the VLBA at 15 GHz did not observe superluminal motion for PKS
1502+036. Despite having the optical characteristics typical of a narrow-line
Seyfert 1 galaxy, radio and gamma-ray properties of PKS 1502+036 are found to
be similar to those of a blazar at the low end of the black hole mass
distribution for blazars. This is in agreement with what has been found in the
case of the other gamma-ray emitting narrow-line Seyfert 1 SBS 0846+513.


title: STILT: System Design & Performance

abstract:
  The Small Telescopes Installed at the Liverpool Telescope (STILT) have been
in operation since March 2009, collecting wide field data from their position,
mounted to the Liverpool Telescope. The two instruments; SkycamT and SkycamZ
have been used to create a variability search of the skies visible at La Palma
with the limits of 12th and 18th R band magnitude with fields of view of 21x21
and 1x1 degrees. We provide here a description of the hardware and software
setup and the performance of the system to date.


title: Extending Modern SAT Solvers for Enumerating All Models

abstract:
  In this paper, we address the problem of enumerating all models of a Boolean
formula in conjunctive normal form (CNF). We propose an extension of CDCL-based
SAT solvers to deal with this fundamental problem. Then, we provide an
experimental evaluation of our proposed SAT model enumeration algorithms on
both satisfiable SAT instances taken from the last SAT challenge and on
instances from the SAT-based encoding of sequence mining problems.


title: Weak type (1, 1) inequalities for discrete rough maximal functions

abstract:
  The aim of this paper is to show that the discrete maximal function
$$\mathcal{M}_{h}f(x)=\sup_{N\in\mathbb{N}}\frac{1}{|\mathbf{N}_{h}\cap[1,
N]|}\Big|\sum_{n\in \mathbf{N}_{h}\cap[1, N]}f(x-n)\Big|,\ \ \mbox{for
$x\in\mathbb{Z}$},$$ is of weak type $(1, 1)$, where
$\mathbf{N}_{h}=\{n\in\mathbb{N}: \exists_{m\in\mathbb{N}}\ n=\lfloor
h(m)\rfloor\}$ for an appropriate function $h$. As a consequence we also obtain
pointwise ergodic theorem along the set $\mathbf{N}_{h}$.


title: Well-Pointed Coalgebras

abstract:
  For endofunctors of varieties preserving intersections, a new description of
the final coalgebra and the initial algebra is presented: the former consists
of all well-pointed coalgebras. These are the pointed coalgebras having no
proper subobject and no proper quotient. The initial algebra consists of all
well-pointed coalgebras that are well-founded in the sense of Osius and Taylor.
And initial algebras are precisely the final well-founded coalgebras. Finally,
the initial iterative algebra consists of all finite well-pointed coalgebras.
Numerous examples are discussed e.g. automata, graphs, and labeled transition
systems.


title: Squares and difference sets in finite fields

abstract:
  For infinitely many primes $p=4k+1$ we give a slightly improved upper bound
for the maximal cardinality of a set $B\subset \ZZ_p$ such that the difference
set $B-B$ contains only quadratic residues. Namely, instead of the "trivial"
bound $|B|\leq \sqrt{p}$ we prove $|B|\leq \sqrt{p}-1$, under suitable
conditions on $p$. The new bound is valid for approximately three quarters of
the primes $p=4k+1$.


title: Spectroscopy of Faint Kepler Mission Exoplanet Candidate Host Stars

abstract:
  Stellar properties are measured for a large set of Kepler Mission exoplanet
candidate host stars. Most of these stars are fainter than 14th magnitude, in
contrast to other spectroscopic follow-up studies. This sample includes many
high-priority Earth-sized candidate planets. A set of model spectra are fitted
to R~3000 optical spectra of 268 stars to improve estimates of Teff, log(g),
and [Fe/H] for the dwarfs in the range 4750K<Teff<7200K. These stellar
properties are used to find new stellar radii and, in turn, new radius
estimates for the candidate planets. The result of improved stellar
characteristics is a more accurate representation of this Kepler exoplanet
sample and identification of promising candidates for more detailed study. This
stellar sample, particularly among stars with Teff>5200K, includes a greater
number of relatively evolved stars with larger radii than assumed by the
mission on the basis of multi-color broadband photometry. About 26% of the
modelled stars require radii to be revised upwards by a factor of 1.35 or
greater, and modelling of 87% of the stars suggest some increase in radius. The
sample presented here also exhibits a change in the incidence of planets larger
than 3-4 Earth radii as a function of metallicity. Once [Fe/H] increases to
>=-0.05, large planets suddenly appear in the sample while smaller planets are
found orbiting stars with a wider range of metallicity. The modelled stellar
spectra, as well as an additional 84 stars of mostly lower effective
temperatures, are made available to the community.


title:
Analyticity and Nonanalyticity of Solutions of Delay-Differential
  Equations

abstract:
  We consider the equation $$ \dot x(t)=f(t,x(t),x(\eta(t))) $$ with a variable
time-shift $\eta(t)$. Both the nonlinearity $f$ and the shift function $\eta$
are given, and are assumed to be analytic (that is, holomorphic) functions of
their arguments. Typically the time-shift represents a delay, namely that
$\eta(t)=t-r(t)$ with $r(t)\ge 0$. The main problem considered is to determine
when solutions (generally $C^\infty$ and often periodic solutions) of the
differential equation are analytic functions of $t$; and more precisely, to
determine for a given solution at which values of $t$ it is analytic, and at
which values it is not analytic. Both sufficient conditions for analyticity,
and also for nonanalyticity, at certain values of $t$ are obtained. It is shown
that for some equations there exists a solution which is $C^\infty$ everywhere,
and is analytic at certain values of $t$ but is not analytic at other values of
$t$. Throughout our analysis, the dynamic properties of the map $t\to \eta(t)$
play a crucial role.


title: The Equilibrium Shape of Graphene Domains on Ni(111)

abstract:
  We have determined the equilibrium shape of graphene domains grown on Ni(111)
via carbon segregation at 925{\deg}C. In situ, spatially-resolved electron
diffraction measurements were used to determine the crystallographic
orientation of the edges of the graphene domains. In contrast to recent
theoretical predictions of a nearly-circular shape, we show that graphene
domains, which nucleate with random shapes, all evolve toward a triangular
equilibrium shape with 'zig-zag' edges. Only one of the two possible zig-zag
edge orientations is observed.


title:
Leptonic contributions to the effective electromagnetic coupling at
  four-loop order in QED

abstract:
  The running of the effective electromagnetic coupling is for many electroweak
observables the dominant correction. It plays an important role for deriving
constraints on the Standard Model in the context of electroweak precision
measurements. We compute the four-loop QED corrections to the running of the
effective electromagnetic coupling and perform a numerical evaluation of the
different gauge invariant subsets.


title: On the Physics of Kinetic-Alfven Turbulence

abstract:
  Observations reveal nearly power-law spectra of magnetic and density plasma
fluctuations at subproton scales in the solar wind, which indicates the
presence of a turbulent cascade. We discuss the three-field and two-field
models for micro-scale plasma fluctuations, and then present the results of
numerical simulations of a two-field model of kinetic-Alfven turbulence, which
models plasma motion at sub-proton scales.

categories: physics.plasm-ph astro-ph.GA astro-ph.SR physics.space-ph


title:
Hubble Space Telescope Imaging of the Binary Nucleus of the Planetary
  Nebula EGB 6

abstract:
  EGB 6 is an ancient, low-surface-brightness planetary nebula. The central
star, also cataloged as PG 0950+139, is a very hot DAOZ white dwarf (WD) with
an apparent M dwarf companion, unresolved from the ground but detected
initially through excesses in the JHK bands. Its kinematics indicates
membership in the Galactic disk population. Inside of EGB 6 is an extremely
dense emission knot -- completely unexpected since significant mass loss from
the WD should have ceased ~10^5 y ago. The electron density of the compact
nebula is very high (2.2x10^6 cm^-3), as indicated by collisional de-excitation
of forbidden emission lines. Hubble Space Telescope imaging and grism
spectroscopy are reported here. These resolve the WD and apparent dM companion
-- at a separation of 0."166, or a projected 96(+204,-45) AU at the estimated
distance of 576(+1224, -271) pc (using the V magnitude). Much to our surprise,
we found that the compact emission nebula is superposed on the dM companion,
far from the photoionizing radiation of the WD. Moreover, a a striking
mid-infrared excess has recently been reported in Spitzer/IRAC and MIPS bands,
best fit with two dust shells. The derived ratio L_IR/L_WD = 2.7 x 10^-4 is the
largest yet found for any WD or planetary nucleus. The compact nebula has
maintained its high density for over three decades. We discuss two possible
explanations for the origin and confinement of the compact nebula, neither of
which is completely satisfactory. This leaves the genesis and confinement of
the compact nebula an astrophysical puzzle, yet similar examples appear in the
literature.


title: Nonstandard neutrino interactions and transition magnetic moments

abstract:
  We constrain generic nonstandard neutrino interactions with existing
experimental data on neutrino transition magnetic moments and derive strong
bounds on tensorial couplings of neutrinos to charged fermions. We also discuss
how some of these tensorial couplings can be constrained by other experiments,
e.g., on neutrino-electron and neutrino-nucleus scattering.


title:
Design and Stability of Load-Side Primary Frequency Control in Power
  Systems

abstract:
  We present a systematic method to design ubiquitous continuous fast-acting
distributed load control for primary frequency regulation in power networks, by
formulating an optimal load control (OLC) problem where the objective is to
minimize the aggregate cost of tracking an operating point subject to power
balance over the network. We prove that the swing dynamics and the branch power
flows, coupled with frequency-based load control, serve as a distributed
primal-dual algorithm to solve OLC. We establish the global asymptotic
stability of a multimachine network under such type of load-side primary
frequency control. These results imply that the local frequency deviations at
each bus convey exactly the right information about the global power imbalance
for the loads to make individual decisions that turn out to be globally
optimal. Simulations confirm that the proposed algorithm can rebalance power
and resynchronize bus frequencies after a disturbance with significantly
improved transient performance.


title:
Flat-lens design using Field Transformation and its comparison with
  those based on Transformation Optics and Ray Optics

abstract:
  This paper proposes a technique for designing flat lenses using Field
Transformation (FT), as opposed to Ray Optics (RO) or Transformation Optics
(TO). The lens design consists of 10 layers of graded index dielectric in the
radial direction and 5 layers in the longitudinal direction. The central layer
in the longitudinal direction primarily contributes to a bulk of the phase
transformation, while the other four layers, above and below this middle layer
on either side, act as matching layers that help reduce the reflections
introduced by the impedance mismatch at the interfaces of the middle layer. The
paper compares the performance of the lens, so designed, with those based on
the RO and TO techniques. We show that the proposed lens design using field
transformation is broadband, has a better than 1 dB higher gain compared to the
RO and TO based designs over a wider frequency band, and that its scan
capability is superior as well.


title: The Age and Stellar Parameters of the Procyon Binary System

abstract:
  The Procyon AB binary system (orbital period 40.838 years, a newly-refined
determination), is near and bright enough that the component radii, effective
temperatures, and luminosities are very well determined, although more than one
possible solution to the masses has limited the claimed accuracy. Preliminary
mass determinations for each component are available from HST imaging,
supported by ground-based astrometry and an excellent Hipparcos parallax; we
use these for our preferred solution for the binary system. Other values for
the masses are also considered. We have employed the TYCHO stellar evolution
code to match the radius and luminosity of the F5 IV-V primary star to
determine the system's most likely age as 1.87 +/- 0.13 Gyr. Since prior
studies of Procyon A found its abundance indistinguishable from solar, the
solar composition of Asplund, Grevesse & Sauval (Z=0.014) is assumed for the HR
Diagram flitting. An unsuccessful attempt to fit using the older solar
abundance scale of Grevesse & Sauval (Z=0.019) is also reported. For Procyon B,
eleven new sequences for the cooling of non-DA white dwarfs have been
calculated, to investigate the dependence of the cooling age on (1) the mass,
(2) the core composition, (3) the helium layer mass, and (4) heavy-element
opacities in the helium envelope. Our calculations indicate a cooling age of
1.19+/-0.11 Gyr, which implies that the progenitor mass of Procyon B was
2.59(+0.44,-0.26) Msun. In a plot of initial vs final mass of white dwarfs in
astrometric binaries or star clusters (all with age determinations), the
Procyon B final mass lies several sigma below a straight line fit.


title:
Darboux transformations and Recursion operators for
  differential--difference equations

abstract:
  In this paper we review two concepts directly related to the Lax
representations: Darboux transformations and Recursion operators for integrable
systems. We then present an extensive list of integrable
differential-difference equations together with their Hamiltonian structures,
recursion operators, nontrivial generalised symmetries and Darboux-Lax
representations. The new results include multi-Hamiltonian structures and
recursion operators for integrable Volterra type equations, integrable
discretization of derivative nonlinear Schr\"odinger equations such as the
Kaup-Newell lattice, the Chen-Lee-Liu lattice and the Ablowitz-Ramani-Segur
(Gerdjikov-Ivanov) lattice. We also compute the weakly nonlocal inverse
recursion operators.


title:
Inductively Coupled Plasma etching of amorphous silicon nanostructures
  over nanotopography using C4F8/SF6 chemistry

abstract:
  Inductively Coupled Plasma (ICP) etching of amorphous silicon (a-Si)
nanostructures using a continuous C4F8/SF6 plasma over nanotopography in
silicon dioxide (SiO2) is investigated. The coil power of the ICP system is
used to tune the a-Si etch rate from 20 to 125 nm/min. The etch rates of a-Si,
SiO2 and electroresist are measured depending on the SF6 ratio, platen power
and chamber pressure and used to optimize the a-Si:SiO2 etch selectivity. The
results on nanostructures show that the presence of an insulating etch-stop
layer affects the passivation ratio required to achieve vertical sidewalls. A
low pressure is also necessary in order to etch the silicon nanostructure
embedded into the oxide nanotrenches to form a highly conformable a-Si
nanowire. We argue that both of these behaviors could be explained by surface
charging effects. Finally, etching of 20 nm a-Si nanowires that cross 15 nm
trenches in oxide with vertical sidewalls and a 4.3:1 a-Si:SiO2 etch
selectivity is demonstrated. This etching process can be used in applications
where nanotopography is present such as single electron transistors or
multigate transistors.


title: Bottomonium(-like) State Spectroscopy at B-Factories

abstract:
  Bottomonium spectroscopy is a key source necessary for understanding of
Quantum Chromodynamics. The expected results of this endeavor will provide
important tests for various theoretical approaches to understanding
quark-antiquark interaction dynamics. Recent results in bottomonium
spectroscopy are presented.


title:
Simultaneous enhancement in gamma.gamma, b.b-bar and tau+.tau- rates in
  the NMSSM with nearly degenerate scalar and pseudoscalar Higgs bosons

abstract:
  We propose an experimental test of a scenario in the Next-to-Minimal
Supersymmetric Standard Model in which both the lightest scalar and the
lightest pseudoscalar Higgs bosons have masses around 125 GeV. The pseudoscalar
can contribute significantly to the gamma.gamma rate at the LHC due to light
Higgsino-like charginos in its effective one-loop coupling to two photons. Such
charginos are obtained for small values of the mu_eff parameter which also
results in enhanced b.b-bar and tau+.tau- rates compared to those expected for
a Standard Model Higgs boson. This scenario should result in a clear
discrepancy between the observed rates in these three decay channels and those
in the WW and ZZ channels, since the pseudoscalar does not couple to the W and
Z bosons. However, in the dominant gluon fusion production mode the
pseudoscalar will stay hidden behind the SM-like scalar Higgs boson and in
order for it to be observable the associated b.b-bar.h production mode has to
be considered, the cross section for which is tiny in the Standard Model but
tan.beta-enhanced in supersymmetry. We analyze the constrained NMSSM with
non-universal Higgs sector parameters and identify regions of its parameter
space where the lightest pseudoscalar with mass around 125 GeV and strongly
enhanced gamma.gamma (up to 60%), b.b-bar and tau+.tau- rates in the b.b-bar.h
mode can be obtained.


title: Magnetohydrodynamic equilibria in barotropic stars

abstract:
  Although barotropic matter does not constitute a realistic model for magnetic
stars, it would be interesting to confirm a recent conjecture that states that
magnetized stars with a barotropic equation of state would be dynamically
unstable (Reisenegger 2009). In this work we construct a set of barotropic
equilibria, which can eventually be tested using a stability criterion. A
general description of the ideal MHD equations governing these equilibria is
summarized, allowing for both poloidal and toroidal magnetic field components.
A new finite-difference numerical code is developed in order to solve the
so-called Grad-Shafranov equation describing the equilibrium of these
configurations, and some properties of the equilibria obtained are briefly
discussed.


title:
High brightness and fully coherent x-ray pulses from XFELO seeded
  high-gain FEL schemes

abstract:
  The successful operation of the hard x-ray self-seeding experiment at the
LCLS opens the era of fully coherent hard x-ray free electron lasers (FELs).
However, the shot-to-shot radiation fluctuation is still a serious issue. In
this paper, high-gain, single-pass x-ray FEL schemes seeded by the narrow
bandwidth radiation signal from an x-ray FEL oscillator were proposed and
investigated, which are expected to generate high brightness, fully coherent
and stable x-ray pulse. A simple model has been developed to figure out the
temporal and the spectral structures of the output pulses in x-ray FEL
oscillator. And options using two synchronized accelerators and using one
accelerator were considered, respectively.


title: Heterotic Calabi-Yau Compactifications with Flux

abstract:
  Compactifications of the heterotic string with NS flux normally require non
Calabi-Yau internal spaces which are complex but no longer K\"ahler. We point
out that this conclusion rests on the assumption of a maximally symmetric
four-dimensional space-time and can be avoided if this assumption is relaxed.
Specifically, it is shown that an internal Calabi-Yau manifold is consistent
with the presence of NS flux provided four-dimensional space-time is taken to
be a domain wall. These Calabi-Yau domain wall solutions can still be
associated with a covariant four-dimensional N=1 supergravity. In this
four-dimensional context, the domain wall arises as the "simplest" solution to
the effective supergravity due to the presence of a flux potential with a
runaway direction. Our main message is that NS flux is a legitimate ingredient
for moduli stabilization in heterotic Calabi-Yau models. Ultimately, the
success of such models depends on the ability to stabilize the runaway
direction and thereby "lift" the domain wall to a maximally supersymmetric
vacuum.


title: Volumes on Complex Analytic Spaces

abstract:
  We show that volumes and related limits in terms of the Kodaira-Iitaka
dimension exist for line bundles and graded linear series on compact reduced
complex analytic spaces.


title:
An Empirical Investigation of V-I Trajectory based Load Signatures for
  Non-Intrusive Load Monitoring

abstract:
  Choice of load signature or feature space is one of the most fundamental
design choices for non-intrusive load monitoring or energy disaggregation
problem. Electrical power quantities, harmonic load characteristics, canonical
transient and steady-state waveforms are some of the typical choices of load
signature or load signature basis for current research addressing appliance
classification and prediction. This paper expands and evaluates appliance load
signatures based on V-I trajectory - the mutual locus of instantaneous voltage
and current waveforms - for precision and robustness of prediction in
classification algorithms used to disaggregate residential overall energy use
and predict constituent appliance profiles. We also demonstrate the use of
variants of differential evolution as a novel strategy for selection of optimal
load models in context of energy disaggregation. A publicly available benchmark
dataset REDD is employed for evaluation purposes. Our experimental evaluations
indicate that these load signatures, in conjunction with a number of popular
classification algorithms, offer better or generally comparable overall
precision of prediction, robustness and reliability against dynamic, noisy and
highly similar load signatures with reference to electrical power quantities
and harmonic content. Herein, wave-shape features are found to be an effective
new basis of classification and prediction for semi-automated energy
disaggregation and monitoring.


title: Prior-Independent Mechanisms for Scheduling

abstract:
  We study the makespan minimization problem with unrelated selfish machines
under the assumption that job sizes are stochastic. We design simple truthful
mechanisms that under various distributional assumptions provide constant and
sublogarithmic approximations to expected makespan. Our mechanisms are
prior-independent in that they do not rely on knowledge of the job size
distributions. Prior-independent approximation mechanisms have been previously
studied for the objective of revenue maximization [Dhangwatnotai, Roughgarden
and Yan'10, Devanur, Hartline, Karlin and Nguyen'11, Roughgarden, Talgam-Cohen
and Yan'12]. In contrast to our results, in prior-free settings no truthful
anonymous deterministic mechanism for the makespan objective can provide a
sublinear approximation [Ashlagi, Dobzinski and Lavi'09].


title: Cost-Recovering Bayesian Algorithmic Mechanism Design

abstract:
  We study the design of Bayesian incentive compatible mechanisms in single
parameter domains, for the objective of optimizing social efficiency as
measured by social cost. In the problems we consider, a group of participants
compete to receive service from a mechanism that can provide such services at a
cost. The mechanism wishes to choose which agents to serve in order to maximize
social efficiency, but is not willing to suffer an expected loss: the agents'
payments should cover the cost of service in expectation.
  We develop a general method for converting arbitrary approximation algorithms
for the underlying optimization problem into Bayesian incentive compatible
mechanisms that are cost-recovering in expectation. In particular, we give
polynomial time black-box reductions from the mechanism design problem to the
problem of designing a social cost minimization algorithm without incentive
constraints. Our reduction increases the expected social cost of the given
algorithm by a factor of O(log(min{n, h})), where n is the number of agents and
h is the ratio between the highest and lowest nonzero valuations in the
support. We also provide a lower bound illustrating that this inflation of the
social cost is essential: no BIC cost-recovering mechanism can achieve an
approximation factor better than \Omega(log(n)) or \Omega(log(h)) in general.
  Our techniques extend to show that a certain class of truthful algorithms can
be made cost-recovering in the non-Bayesian setting, in such a way that the
approximation factor degrades by at most O(log(min{n, h})). This is an
improvement over previously-known constructions with inflation factor O(log n).


title: On graded presentations of Hecke algebras and their generalizations

abstract:
  In this paper, we define a number of closely related isomorphisms. On one
side of these isomorphisms sit a number of of algebras generalizing the Hecke
and affine Hecke algebras, which we call the "Hecke family"; on the other, we
find generalizations of KLR algebras in finite and affine type A, the "KLR
family."
  We show that these algebras have compatible isomorphisms generalizing those
between Hecke and KLR algebras given by Brundan and Kleshchev. This allows us
to organize a long list of algebras and categories into a single system,
including (affine/cyclotomic) Hecke algebras, (affine/cyclotomic) $q$-Schur
algebras, (weighted) KLR algebras, category $\mathcal{O}$ for $\mathfrak{gl}_N$
and for the Cherednik algebras for the groups $\mathbb{Z}/e\mathbb{Z}\wr S_m$,
and give graded presentations of all of these objects.


title:
Effects of parity violation on non-gaussianity of primordial
  gravitational waves in Ho\v{r}ava-Lifshitz gravity

abstract:
  In this paper, we study the effects of parity violation on non-gaussianities
of primordial gravitational waves in the framework of Ho\v{r}ava-Lifshitz
theory of gravity, in which high-order spatial derivative operators, including
the ones violating parity, generically appear. By calculating the three point
function, we find that the leading-order contributions to the non-gaussianities
come from the usual second-order derivative terms, which produce the same
bispectrum as that found in general relativity. The contributions from
high-order spatial n-th derivative terms are always suppressed by a factor
$(H/M_*)^{n-2} \; (n \ge 3)$, where $H$ denotes the inflationary energy and
$M_*$ the suppression mass scale of the high-order spatial derivative operators
of the theory. Therefore, the next leading-order contributions come from the
3-dimensional gravitational Chern-Simons term. With some reasonable arguments,
it is shown that this 3-dimensional operator is the only one that violates the
parity and in the meantime has non-vanishing contributions to
non-gaussianities.


title:
On the Cayley graph of a commutative ring with respect to its
  zero-divisors

abstract:
  Let $R$ be a commutative ring with unity and $R^{+}$ be $Z^*(R)$ be the
additive group and the set of all non-zero zero-divisors of $R$, respectively.
We denote by $\mathbb{CAY}(R)$ the Cayley graph $Cay(R^+,Z^*(R))$. In this
paper, we study $\mathbb{CAY}(R)$. Among other results, it is shown that for
every zero-dimensional non-local ring $R$, $\mathbb{CAY}(R)$ is a connected
graph of diameter 2. Moreover, for a finite ring $R$, we obtain the vertex
connectivity and the edge connectivity of $\mathbb{CAY}(R)$. We investigate
rings $R$ with perfect $\mathbb{CAY}(R)$ as well. We also study
$Reg(\mathbb{CAY}(R))$ the induced subgraph on the regular elements of $R$.
This graph gives a family of vertex transitive graphs. We show that if $R$ is a
Noetherian ring and $Reg(\mathbb{CAY}(R))$ has no infinite clique, then $R$ is
finite. Furthermore, for every finite ring $R$, the clique number and the
chromatic number of $Reg(\mathbb{CAY}(R))$ are determined.


title: Bing doubling and the colored Jones polynomial

abstract:
  Bing doubling is an operation which gives a satellite of a knot. It is also
applied to a link by specifying a component of the link. We give a formula to
compute the reduced colored Jones polynomial of a Bing double by using that of
the companion. This formula enables us to compute a lot of examples of the
reduced colored Jones polynomial of Bing doubles. Moreover, from this formula
we can derive a divisibility property of the unified Witten-Reshetikhin-Turaev
invariant of integral homology spheres obtained by \pm1 surgery along Bing
doubles of knots. This result is applied to the Witten-Reshetikhin-Turaev
invariant and the Ohtsuki series of these integral homology spheres.


title: Repeated columns and an old chestnut

abstract:
  Let $t\ge 1$ be a given integer. Let ${\cal F}$ be a family of subsets of
$[m]=\{1,2,\ldots,m\}$. Assume that for every pair of disjoint sets $S,T\subset
[m]$ with $|S|=|T|=k$, there do not exist $2t$ sets in ${\cal F}$ where $t$
subsets of ${\cal F}$ contain $S$ and are disjoint from $T$ and $t$ subsets of
${\cal F}$ contain $T$ and are disjoint from $S$. We show that $|{\cal F}|$ is
$O(m^{k})$.
  Our main new ingredient is allowing, during the inductive proof, multisets of
subsets of $[m]$ where the multiplicity of a given set is bounded by $t-1$. We
use a strong stability result of Anstee and Keevash. This is further evidence
for a conjecture of Anstee and Sali. These problems can be stated in the
language of matrices Let $t\cdot M$ denote $t$ copies of the matrix $M$
concatenated together. We have established the conjecture for those
configurations $t\cdot F$ for any $k\times 2$ (0,1)-matrix $F$.


title: On p-adic properties of Siegel modular forms

abstract:
  We show that Siegel modular forms of level \Gamma_0(p^m) are p-adic modular
forms. Moreover we show that derivatives of such Siegel modular forms are
p-adic. Parts of our results are also valid for vector-valued modular forms. In
our approach to p-adic Siegel modular forms we follow Serre closely; his proofs
however do not generalize to the Siegel case or need some modifications.


title:
Fermiology, Orbital Order, Orbital Fluctuation and Cooper Pairing in
  Iron-based Superconductors

abstract:
  We address two important issues that arise in recent studies of iron-based
superconductivity. (1) Why are the T_c of A_xFe_{2-y}Se_2 and the single unit
cell FeSe on SrTiO$_3$ so high despite both only have electron pockets? (2)
What (if any) are the effects of orbital order and orbital fluctuation on the
Cooper pairing. Our conclusions are summarized in the third paragraph of the
paper.


title:
Results from a Practical Deployment of the MyZone Decentralized P2P
  Social Network

abstract:
  This paper presents MyZone, a private online social network for relatively
small, closely-knit communities. MyZone has three important distinguishing
features. First, users keep the ownership of their data and have complete
control over maintaining their privacy. Second, MyZone is free from any
possibility of content censorship and is highly resilient to any single point
of disconnection. Finally, MyZone minimizes deployment cost by minimizing its
computation, storage and network bandwidth requirements. It incorporates both a
P2P architecture and a centralized architecture in its design ensuring high
availability, security and privacy. A prototype of MyZone was deployed over a
period of 40 days with a membership of more than one hundred users. The paper
provides a detailed evaluation of the results obtained from this deployment.


title:
CANDELS Observations of the Environmental Dependence of the
  Color-Mass-Morphology Relation at z = 1.6

abstract:
  We study the environmental dependence of color, stellar mass, and morphology
by comparing galaxies in a forming cluster to those in the field at z = 1:6
with Hubble Space Telescope near-infrared imaging in the CANDELS/UDS field. We
quantify the morphology of the galaxies using the effective radius, reff, and
S\'ersic index, n. In both the cluster and field, approximately half of the
bulge-dominated galaxies (n > 2) reside on the red sequence of the
color-magnitude diagram, and most disk-dominated galaxies (n < 2) have colors
expected for star-forming galaxies. There is weak evidence that cluster
galaxies have redder rest-frame U - B colors and higher stellar masses compared
to the field. Star-forming galaxies in both the cluster and field show no
significant differences in their morphologies. In contrast, there is evidence
that quiescent galaxies in the cluster have larger median effective radii and
smaller S\'ersic indices compared to the field with a significance of 2?. These
differences are most pronounced for galaxies at clustercentric distances 1 Mpc
< Rproj < 1.5 Mpc, which have low S\'ersic indices and possibly larger
effective radii, more consistent with star-forming galaxies at this epoch and
in contrast to other quiescent galaxies. We argue that star-forming galaxies
are processed under the influence of the cluster environment at distances
greater than the cluster-halo virial radius. Our results are consistent with
models where gas accretion onto these galaxies is suppressed from processes
associated with the cluster environment.


title:
A Probabilistic Approach for Gradient Inequalities on Time-Inhomogeneous
  Manifolds

abstract:
  Gradient inequalities of the Hamilton type and the Li-Yau type for positive
solutions to the heat equation are established from a probabilistic viewpoint,
which simplifies the proofs of some results of Sun [{\it Pacific J. Math.}, 253
(2011), pp. 489--510].


title:
Multiplicity and transverse-momentum dependence of two- and
  four-particle correlations in pPb and PbPb collisions

abstract:
  Measurements of two- and four-particle angular correlations for charged
particles emitted in pPb collisions are presented over a wide range in
pseudorapidity and full azimuth. The data, corresponding to an integrated
luminosity of approximately 31 inverse nanobarns, were collected during the
2013 LHC pPb run at a nucleon-nucleon center-of-mass energy of 5.02 TeV by the
CMS experiment. The results are compared to 2.76 TeV semi-peripheral PbPb
collision data, collected during the 2011 PbPb run, covering a similar range of
particle multiplicities. The observed correlations are characterized by the
near-side (abs(Delta(phi)~0) associated pair yields and the azimuthal
anisotropy Fourier harmonics (v[n]). The second-order (v[2]) and third-order
(v[3]) anisotropy harmonics are extracted using the two-particle azimuthal
correlation technique. A four-particle correlation method is also applied to
obtain the value of v[2] and further explore the multi-particle nature of the
correlations. Both associated pair yields and anisotropy harmonics are studied
as a function of particle multiplicity and transverse momentum. The associated
pair yields, the four-particle v[2], and the v[3] become apparent at about the
same multiplicity. A remarkable similarity in the v[3] signal as a function of
multiplicity is observed between the pPb and PbPb systems. Predictions based on
the color glass condensate and hydrodynamic models are compared to the
experimental results.


title: Central Limit Theorems for Supercritical Branching Markov Processes

abstract:
  In this paper we establish spatial central limit theorems for a large class
of supercritical branching Markov processes with general spatial-dependent
branching mechanisms. These are generalizations of the spatial central limit
theorems proved in [1], P. for branching OU processes with binary branching
mechanisms. Compared with the results of [1], our central limit theorems are
more satisfactory in the sense that the normal random variables in our theorems
are non-degenerate.


title: Hyperbolic three manifolds of bounded volume and trace field degree

abstract:
  For a single cusped hyperbolic 3-manifold, Hodgson proved that there are only
finitely many Dehn fillings of it whose trace fields have bounded degree. In
this paper, we conjecture the same for manifolds with more cusps, and give the
first positive results in this direction. For example, in the 2-cusped case, if
a manifold has linearly independent cusp shapes, we show that the manifold has
the desired property.To prove the results, we use the proof of the Bounded
Height Conjecture in arithmetic geometry.


title: Deriving Matrix Concentration Inequalities from Kernel Couplings

abstract:
  This paper derives exponential tail bounds and polynomial moment inequalities
for the spectral norm deviation of a random matrix from its mean value. The
argument depends on a matrix extension of Stein's method of exchangeable pairs
for concentration of measure, as introduced by Chatterjee. Recent work of
Mackey et al. uses these techniques to analyze random matrices with additive
structure, while the enhancements in this paper cover a wider class of
matrix-valued random elements. In particular, these ideas lead to a bounded
differences inequality that applies to random matrices constructed from weakly
dependent random variables. The proofs require novel trace inequalities that
may be of independent interest.


title:
Sine-Gordon Solitons, Kinks and Breathers as Physical Models of
  Nonlinear Excitations in Living Cellular Structures

abstract:
  Nonlinear space-time dynamics, defined in terms of celebrated 'solitonic'
equations, brings indispensable tools for understanding, prediction and control
of complex behaviors in both physical and life sciences. In this paper, we
review sine-Gordon solitons, kinks and breathers as models of nonlinear
excitations in complex systems in physics and in living cellular structures,
both intra-cellular (DNA, protein folding and microtubules) and inter-cellular
(neural impulses and muscular contractions).
  Key words: Sine-Gordon solitons, kinks and breathers, DNA, Protein folding,
Microtubules, Neural conduction, Muscular contraction


title:
Large gas reservoirs and free-free emission in two lensed star-forming
  galaxies at z=2.7

abstract:
  We report the detection of CO(1-0) line emission in the bright, lensed
star-forming galaxies SPT-S 233227-5358.5 (z=2.73) and SPT-S 053816-5030.8
(z=2.78), using the Australia Telescope Compact Array (ATCA). Both galaxies
were discovered in a large-area millimeter survey with the South Pole Telescope
(SPT) and found to be gravitationally lensed by intervening structures. The
measured CO intensities imply galaxies with molecular gas masses of (3.2 \pm
0.5)x10^10 (mu/15)^{-1}(X_CO/0.8) M_sun and (1.7 \pm 0.3)x10^10
(mu/20)^{-1}(X_CO/0.8) M_sun, and gas depletion timescales of 4.9x10^7
(X_CO/0.8) yr and 2.6x10^7 (X_CO/0.8) yr, respectively, where mu corresponds to
the lens magnification and X_CO is the CO luminosity to gas mass conversion
factor. In the case of SPT-S 053816-5030.8, we also obtained significant
detections of the rest-frame 115.7 and 132.4 GHz radio continuum. Based on the
radio to infrared spectral energy distribution and an assumed synchrotron
spectral index, we find that 42 \pm 10 % and 55 \pm 13 % of the flux at
rest-frame 115.7 and 132.4 GHz arise from free-free emission. We find a
radio-derived intrinsic star formation rate (SFR) of 470 \pm 170 M_sun/yr,
consistent within the uncertainties with the infrared estimate. Based on the
morphology of this object in the source plane, the derived gas mass and the
possible flattening of the radio spectral index towards low frequencies, we
argue that SPT-S 053816-5030.8 exhibits properties compatible with a scaled-up
local ultra-luminous infrared galaxy.


title:
Astronomical seeing and ground-layer turbulence in the Canadian High
  Arctic

abstract:
  We report results of a two-year campaign of measurements, during arctic
winter darkness, of optical turbulence in the atmospheric boundary-layer above
the Polar Environment Atmospheric Laboratory in northern Ellesmere Island
(latitude +80 deg N). The data reveal that the ground-layer turbulence in the
Arctic is often quite weak, even at the comparatively-low 610 m altitude of
this site. The median and 25th percentile ground-layer seeing, at a height of
20 m, are found to be 0.57 and 0.25 arcsec, respectively. When combined with a
free-atmosphere component of 0.30 arcsec, the median and 25th percentile total
seeing for this height is 0.68 and 0.42 arcsec respectively. The median total
seeing from a height of 7 m is estimated to be 0.81 arcsec. These values are
comparable to those found at the best high-altitude astronomical sites.


title: $L^p$-Liouville theorems on complete smooth metric measure spaces

abstract:
  We study some function-theoretic properties on a complete smooth metric
measure space $(M,g,e^{-f}dv)$ with Bakry-\'{E}mery Ricci curvature bounded
from below. We derive a Moser's parabolic Harnack inequality for the $f$-heat
equation, which leads to upper and lower Gaussian bounds on the $f$-heat
kernel. We also prove $L^p$-Liouville theorems in terms of the lower bound of
Bakry-\'{E}mery Ricci curvature and the bound of function $f$, which generalize
the classical Ricci curvature case and the $N$-Bakry-\'{E}mery Ricci curvature
case.


title: Bayesian Manifold Regression

abstract:
  There is increasing interest in the problem of nonparametric regression with
high-dimensional predictors. When the number of predictors $D$ is large, one
encounters a daunting problem in attempting to estimate a $D$-dimensional
surface based on limited data. Fortunately, in many applications, the support
of the data is concentrated on a $d$-dimensional subspace with $d \ll D$.
Manifold learning attempts to estimate this subspace. Our focus is on
developing computationally tractable and theoretically supported Bayesian
nonparametric regression methods in this context. When the subspace corresponds
to a locally-Euclidean compact Riemannian manifold, we show that a Gaussian
process regression approach can be applied that leads to the minimax optimal
adaptive rate in estimating the regression function under some conditions. The
proposed model bypasses the need to estimate the manifold, and can be
implemented using standard algorithms for posterior computation in Gaussian
processes. Finite sample performance is illustrated in an example data
analysis.


title:
Sharp Hamilton's Laplacian estimate for the heat kernel on complete
  manifolds

abstract:
  In this paper we give Hamilton's Laplacian estimates for the heat equation on
complete noncompact manifolds with nonnegative Ricci curvature. As an
application, combining Li-Yau's lower and upper bounds of the heat kernel, we
give an estimate on Laplacian form of the heat kernel on complete manifolds
with nonnegative Ricci curvature that is sharp in the order of time parameter
for the heat kernel on the Euclidean space.


title:
Resource Allocation for Downlink Channel Transmission Based on
  Superposition Coding

abstract:
  We analyze the problem of transmitting information to multiple users over a
shared wireless channel. The problem of resource allocation (RA) for the users
with the knowledge of their channel state information has been treated
extensively in the literature where various approaches trading off the users'
throughput and fairness were proposed. The emphasis was mostly on the
time-sharing (TS) approach, where the resource allocated to the user is
equivalent to its time share of the channel access. In this work, we propose to
take advantage of the broadcast nature of the channel and we adopt
superposition coding (SC)-known to outperform TS in multiple users broadcasting
scenarios. In SC, users' messages are simultaneously transmitted by superposing
their codewords with different power fractions under a total power constraint.
The main challenge is to find a simple way to allocate these power fractions to
all users taking into account the fairness/throughput tradeoff. We present an
algorithm with this purpose and we apply it in the case of popular proportional
fairness (PF). The obtained results using SC are illustrated with various
numerical examples where, comparing to TS, a rate increase between 20% and 300%
is observed.


title:
An Order Theoretic Approach to the Banach Contraction Principle in
  Modular Spaces

abstract:
  In the present note, the Banach contraction principle is proved in complete
modular spaces via an order theoretic approach.


title:
Trilinear gauge boson couplings in the standard model with one universal
  extra dimension

abstract:
  One-loop effects of Standard Model (SM) extensions comprising universal extra
dimensions are essential as a consequence of Kaluza-Klein (KK) parity
conservation, for they represent the very first presumable virtual effects on
low-energy observables. In this paper, we calculate the one-loop CP-even
contributions to the SM WWgamma and WWZ gauge couplings produced by the KK
excited modes that stand for the dynamical variables of the effective theory
emerged from a generalization of the SM to five dimensions, in which the extra
dimension is assumed to be universal, after compactification. The employment of
a covariant gauge-fixing procedure that removes gauge invariance associated to
gauge KK excited modes, while keeping electroweak gauge symmetry manifest, is a
main feature of this calculation, which is performed in the Feynman 't Hooft
gauge and yields finite results that consistently decouple for a large
compactification scale. After numerical evaluation, our results show to be
comparable with the one-loop SM contributions and well within the reach of a
next linear collider.


title: Global existence of weak solution for the 2-D Ericksen-Leslie system

abstract:
  We prove the global existence of weak solution for two dimensional
Ericksen-Leslie system with the Leslie stress and general Ericksen stress under
the physical constrains on the Leslie coefficients. We also prove the local
well-posedness of the Ericksen-Leslie system in two and three spatial
dimensions.


title:
Circadian clocks optimally adapt to sunlight for reliable
  synchronization

abstract:
  Circadian oscillation provides selection advantages through synchronization
to the daylight cycle. However, a reliable clock must be designed through two
conflicting properties: entrainability to synchronize internal time with
periodic stimuli such as sunlight, and regularity to oscillate with a precise
period. These two aspects do not easily coexist because better entrainability
favors higher sensitivity, which may sacrifice the regularity. To investigate
conditions for satisfying the two properties, we analytically calculated the
optimal phase-response curve with a variational method. Our result indicates an
existence of a dead zone, i.e., a time period during which input stimuli
neither advance nor delay the clock. A dead zone appears only when input
stimuli obey the time course of actual solar radiation but a simple sine curve
cannot yield a dead zone. Our calculation demonstrates that every circadian
clock with a dead zone is optimally adapted to the daylight cycle.


title:
Extent of sensitivity of single photon production to parton distribution
  functions

abstract:
  We have studied the production of single isolated prompt photons in high
energy proton-proton collisions at the RHIC ($\sqrt{s}$= 200 GeV) and the LHC
($\sqrt{s}$= 7 TeV) energies within the frame work of perturbative QCD upto
next-to leading order of strong coupling ($\alpha_s$). We have used five
different parameterizations of parton distribution function (PDF) starting from
the old CTEQ4M to the new CT10 distributions and compared our results with the
recent single prompt photon data from the PHENIX and the CMS collaborations.
The prompt photon cross-section is found to be described equally well by all
the PDF's within the experimental errors at the RHIC and the LHC energies. The
deviation in the prompt photon yield for different PDF sets is within $\pm$ 20%
when compared to CTEQ4M. The diphoton measurement could be a potential
candidate to constrain the gluon distribution inside the proton.


title: CONATION: English Command Input/Output System for Computers

abstract:
  In this information technology age, a convenient and user friendly interface
is required to operate the computer system on very fast rate. In the human
being, speech being a natural mode of communication has potential to being a
fast and convenient mode of interaction with computer. Speech recognition will
play an important role in taking technology to them. It is the need of this era
to access the information within seconds. This paper describes the design and
development of speaker independent and English command interpreted system for
computers. HMM model is used to represent the phoneme like speech commands.
Experiments have been done on real world data and system has been trained in
normal condition for real world subject.


title: An Improved EM algorithm

abstract:
  In this paper, we firstly give a brief introduction of expectation
maximization (EM) algorithm, and then discuss the initial value sensitivity of
expectation maximization algorithm. Subsequently, we give a short proof of EM's
convergence. Then, we implement experiments with the expectation maximization
algorithm (We implement all the experiments on Gaussion mixture model (GMM)).
Our experiment with expectation maximization is performed in the following
three cases: initialize randomly; initialize with result of K-means; initialize
with result of K-medoids. The experiment result shows that expectation
maximization algorithm depend on its initial state or parameters. And we found
that EM initialized with K-medoids performed better than both the one
initialized with K-means and the one initialized randomly.


title:
Observation of rotation in star forming regions: clouds, cores, disks,
  and jets

abstract:
  Angular momentum plays a crucial role in the formation of stars and planets.
It has long been noticed that parcels of gas in molecular clouds need to reduce
their specific angular momentum by 6 to 7 orders of magnitude to participate in
the building of a typical star like the Sun. Several physical processes on
different scales and at different stages of evolution can contribute to this
loss of angular momentum. In order to set constraints on these processes and
better understand this transfer of angular momentum, a detailed observational
census and characterization of rotation at all stages of evolution and over all
scales of star forming regions is necessary. This review presents the main
results obtained in low-mass star forming regions over the past four decades in
this field of research. It addresses the search and characterization of
rotation in molecular clouds, prestellar and protostellar cores, circumstellar
disks, and jets. Perspectives offered by ALMA are briefly discussed.


title: On angles in Teichm\"uller spaces

abstract:
  We discuss the existence of the angle between two curves in Teichm\"uller
spaces and show that, in any infinite dimensional Teichm\"uller space, there
exist infinitely many geodesic triangles each of which has the same three
vertices and satisfies the property that its three sides have the same and
arbitrarily given length while its three angles are equal to any given three
possibly different numbers from 0 to $\pi$. This implies that the sum of three
angles of a geodesic triangle may be equal to any given number from 0 to $3\pi$
in an infinite dimensional Teichm\"uller space.


title: On the nature of the sea ice albedo feedback in simple models

abstract:
  We examine the nature of the ice-albedo feedback in a long standing approach
used in the dynamic-thermodynamic modeling of sea ice. The central issue
examined is how the evolution of the ice area is treated when modeling a
partial ice cover using a two-category-thickness scheme; thin sea ice and open
water in one category and "thick" sea ice in the second. The problem with the
scheme is that the area-evolution is handled in a manner that violates the
basic rules of calculus, which leads to a neglected area-evolution term that is
equivalent to neglecting a leading-order latent heat flux. We demonstrate the
consequences by constructing energy balance models with a fractional ice cover
and studying them under the influence of increased radiative forcing. It is
shown that the neglected flux is particularly important in a decaying ice cover
approaching the transitions to seasonal or ice-free conditions. Clearly, a
mishandling of the evolution of the ice area has leading-order effects on the
ice-albedo feedback. Accordingly, it may be of considerable importance to
re-examine the relevant climate model schemes and to begin the process of
converting them to fully resolve the sea ice thickness distribution in a manner
such as remapping, which does not in principle suffer from the pathology we
describe.


title: Anisotropic oracle inequalities in noisy quantization

abstract:
  The effect of errors in variables in quantization is investigated. We prove
general exact and non-exact oracle inequalities with fast rates for an
empirical minimization based on a noisy sample
$Z_i=X_i+\epsilon_i,i=1,\ldots,n$, where $X_i$ are i.i.d. with density $f$ and
$\epsilon_i$ are i.i.d. with density $\eta$. These rates depend on the geometry
of the density $f$ and the asymptotic behaviour of the characteristic function
of $\eta$.
  This general study can be applied to the problem of $k$-means clustering with
noisy data. For this purpose, we introduce a deconvolution $k$-means stochastic
minimization which reaches fast rates of convergence under standard Pollard's
regularity assumptions.


title: Simulation of stripping injection into HITFiL with carbon ion

abstract:
  Stripping injection is one of the crucial stages in the accumulation process
of the hadron therapy synchrotron HITFiL (Heavy Ion Therapy Facility in
Lanzhou). In order to simulate the stripping injection process of carbon ions
for HITFiL, the interactions between carbon ions and foil has been studied, and
simulated with a code developed by ourselves .The optimized parameters of the
injecting beam and the scheme of the injection system have been presented for
HITFiL.


title: The CP-matrix completion problem

abstract:
  A symmetric matrix $C$ is completely positive (CP) if there exists an
entrywise nonnegative matrix $B$ such that $C=BB^T$. The CP-completion problem
is to study whether we can assign values to the missing entries of a partial
matrix (i.e., a matrix having unknown entries) such that the completed matrix
is completely positive. We propose a semidefinite algorithm for solving general
CP-completion problems, and study its properties. When all the diagonal entries
are given, the algorithm can give a certificate if a partial matrix is not
CP-completable, and it almost always gives a CP-completion if it is
CP-completable. When diagonal entries are partially given, similar properties
hold. Computational experiments are also presented to show how CP-completion
problems can be solved.


title:
Improving Polarisation Squeezing In Sagnac Interferometer Configuration
  Using Photonic Crystal Fibre

abstract:
  The greater confinement of light that is possible in photonic crystal fibres
leads to a greater effective nonlin- earity, which promises to yield greater
quantum squeezing than is possible in standard optical fibre. However,
experimental work to date has not achieved improvements over standard fibre. We
present a comprehensive numerical investigation of polarisation squeezing in
photonic crystal fibre in a Sagnac configuration. By including loss, a
non-instantaneous Raman response, excess phase-noise, second- and third-order
dispersion and self-steepening, the simulations are able to identify the
physical factors that limit current photonic crystal fibre squeezing
experiments.


title: On the Theory of Ends of a pro-p Group

abstract:
  We study the group of ends of a pro-p group G and prove a pro-p analog of
Stallings' decomposition theorem.


title: Quantum group-twisted tensor products of C*-algebras

abstract:
  We put two C*-algebras together in a noncommutative tensor product using
quantum group coactions on them and a bicharacter relating the two quantum
groups that act. We describe this twisted tensor product in two equivalent
ways. The first construction is based on certain pairs of representations of
quantum groups which we call Heisenberg pairs because they generalise the Weyl
form of the canonical commutation relations. The second construction uses
covariant Hilbert space representations. We establish basic properties of the
twisted tensor product and study some examples.


title: Linear Clique-Width for Hereditary Classes of Cographs

abstract:
  The class of cographs is known to have unbounded linear clique-width. We
prove that a hereditary class of cographs has bounded linear clique-width if
and only if it does not contain all quasi-threshold graphs or their
complements. The proof borrows ideas from the enumeration of permutation
classes.


title:
Trajectory-to-trajectory fluctuations in first-passage phenomena in
  bounded domains

abstract:
  We study the statistics of the first passage of a random walker to absorbing
subsets of the boundary of compact domains in different spatial dimensions. We
describe a novel diagnostic method to quantify the trajectory-to-trajectory
fluctuations of the first passage, based on the distribution of the so-called
uniformity index $\omega$, measuring the similarity of the first passage times
of two independent walkers starting at the same location. We show that the
characteristic shape of $P(\omega)$ exhibits a transition from unimodal to
bimodal, depending on the starting point of the trajectories. From the study of
different geometries in one, two and three dimensions, we conclude that this
transition is a generic property of first passage phenomena in bounded domains.
Our results show that, in general, the Mean First Passage Time (MFPT) is a
meaningful characteristic measure of the first passage behaviour only when the
Brownian walkers start sufficiently far from the absorbing boundary.
Strikingly, in the opposite case, the first passage statistics exhibit large
trajectory-to-trajectory fluctuations and the MFPT is not representative of the
actual behaviour.


title:
Feature Selection Based on Term Frequency and T-Test for Text
  Categorization

abstract:
  Much work has been done on feature selection. Existing methods are based on
document frequency, such as Chi-Square Statistic, Information Gain etc.
However, these methods have two shortcomings: one is that they are not reliable
for low-frequency terms, and the other is that they only count whether one term
occurs in a document and ignore the term frequency. Actually, high-frequency
terms within a specific category are often regards as discriminators.
  This paper focuses on how to construct the feature selection function based
on term frequency, and proposes a new approach based on $t$-test, which is used
to measure the diversity of the distributions of a term between the specific
category and the entire corpus. Extensive comparative experiments on two text
corpora using three classifiers show that our new approach is comparable to or
or slightly better than the state-of-the-art feature selection methods (i.e.,
$\chi^2$, and IG) in terms of macro-$F_1$ and micro-$F_1$.


title:
Exact record and order statistics of random walks via first-passage
  ideas

abstract:
  While records and order statistics of independent and identically distributed
(i.i.d.) random variables X_1, ..., X_N are fully understood, much less is
known for strongly correlated random variables, which is often the situation
encountered in statistical physics. Recently, it was shown, in a series of
works, that one-dimensional random walk (RW) is an interesting laboratory where
the influence of strong correlations on records and order statistics can be
studied in detail. We review here recent exact results which have been obtained
for these questions about RW, using techniques borrowed from the study of
first-passage problems. We also present a brief review of the well known (and
not so well known) results for records and order statistics of i.i.d.
variables.

categories: cond-mat.stat-mech math.PR physics.data-an q-fin.ST


title: Enumeration of generalized $BCI$ lambda-terms

abstract:
  We investigate the asymptotic number of elements of size $n$ in a particular
class of closed lambda-terms (so-called $BCI(p)$-terms) which are related to
axiom systems of combinatory logic. By deriving a differential equation for the
generating function of the counting sequence we obtain a recurrence relation
which can be solved asymptotically. We derive differential equations for the
generating functions of the counting sequences of other more general classes of
terms as well: the class of $BCK(p)$-terms and that of closed lambda-terms.
Using elementary arguments we obtain upper and lowerestimates for the number of
closed lambda-terms of size $n$. Moreover, a recurrence relation is derived
which allows an efficient computation of the counting sequence. $BCK(p)$-terms
are discussed briefly.


title:
Stellar populations and star formation in AGN hosts at intermediate
  redshift in the SHARDS survey

abstract:
  SHARDS is an ongoing ESO/GTC large program that is obtaining ultra-deep
photometry of the GOODS-North field in 24 medium-band filters (reaching m=26.5
AB in all bands) in the 500-950 nm range with GTC/OSIRIS. It is designed to
study the properties of high-z massive galaxies, but it can also provide very
valuable information about the population of AGN at intermediate redshifts
(z~0.5-2). Here we present preliminary results on a study of the stellar
populations and star formation activity in the host galaxies of X-ray selected
optically faint AGN at 0.6<z<1.1. We demonstrate that the SHARDS photometry
provides a reliable measurement of the 4000 \AA{} break (Dn(4000), an indicator
for the age of stellar populations) down to m=26.5 AB. We confirm that most
X-ray selected AGN are hosted by massive galaxies (typically M*>10^10.5 Mo) and
that the fraction of galaxies hosting an AGN increases with the stellar mass.
AGN-hosts have restframe U-V and Dn(4000) comparable to those of non-active
galaxies of the same mass, that is, they do not appear to have on average
younger stellar populations, unlike in the Local Universe. Nevertheless, z~1
AGN hosts show an excess of IR emission at {\lambda}>3{\mu}m compared to
non-AGN galaxies which might indicate increased star formation rates. In
addition, the frequency of AGN in massive galaxies is about twice higher for
the ones with young stellar populations compared to the older ones.


title:
Dimensional Differences Between Faces of the Cones of Nonnegative
  Polynomials and Sums of Squares

abstract:
  We study dimensions of the faces of the cone of nonnegative polynomials and
the cone of sums of squares; we show that there are dimensional differences
between corresponding faces of these cones. These dimensional gaps occur in all
cases where there exist nonnegative polynomials that are not sums of squares.
The gaps occur generically, they are not the product of selecting special faces
of the cones. For ternary forms and quaternary quartics, we completely
characterize when these differences are observed. Moreover, we provide an
explicit description for these differences in the two smallest cases, in which
the cone of nonnegative polynomials and the cone of sums of squares are
different. Our results follow from more general results concerning the
relationship between the second ordinary power and the second symbolic power of
the vanishing ideal of points in projective space.


title:
Momentum-space spectroscopy for advanced analysis of dielectric-loaded
  surface plasmon polariton coupled and bent waveguides

abstract:
  We perform advanced radiation leakage microscopy of routing dielectric-loaded
plasmonic waveguiding structures. By direct plane imaging and momentum-space
spectroscopy, we analyze the energy transfer between coupled waveguides as a
function of gap distance and reveal the momentum distribution of curved
geometries. Specifically, we observed a clear degeneracy lift of the effective
indices for strongly interacting waveguides in agreement with coupled-mode
theory. We use momentum-space representations to discuss the effect of
curvature on dielectric-loaded waveguides. The experimental images are
successfully reproduced by a numerical and an analytical model of the mode
propagating in a curved plasmonic waveguide.


title:
A multilinear algebra proof of the Cauchy-Binet formula and a
  multilinear version of Parseval's identity

abstract:
  We give a short proof of the Cauchy-Binet determinantal formula using
multilinear algebra by first generalizing it to an identity {\em not} involving
determinants. By extending the formula to abstract Hilbert spaces we obtain, as
a corollary, a generalization of the classical Parseval identity.


title:
Supercurrent and dynamical instability of spin-orbit-coupled ultracold
  Bose gases

abstract:
  We investigate the stability of supercurrents in a Bose-Einstein condensate
with one-dimensional spin-orbit and Raman couplings. The consequence of the
lack of Galilean invariance is explicitly discussed. We show that in the
plane-wave phase, characterized by a uniform density, the supercurrent state
can become dynamically unstable, the instability being associated with the
occurrence of a complex sound velocity, in a region where the effective mass is
negative. We also discuss the emergence of energetic instability in these
supercurrent states. We argue that both the dynamical and the energetic
instabilities in these systems can be generated experimentally through
excitation of the collective dipole oscillation.


title:
Convolution spline approximations for time domain boundary integral
  equations

abstract:
  We introduce a new "convolution spline" temporal approximation of time domain
boundary integral equations (TDBIEs). It shares some properties of convolution
quadrature (CQ), but instead of being based on an underlying ODE solver the
approximation is explicitly constructed in terms of compactly supported basis
functions. This results in sparse system matrices and makes it computationally
more efficient than using the linear multistep version of CQ for TDBIE
time-stepping. We use a Volterra integral equation (VIE) to illustrate the
derivation of this new approach: at time step $t_n = n h$ the VIE solution is
approximated in a backwards-in-time manner in terms of basis functions $\phi_j$
by $u(t_n-t) \approx \sum_{j=0}^n u_{n-j}\,\phi_j(t/h)$ for $t \in [0,t_n]$. We
show that using isogeometric B-splines of degree $m\ge 1$ on $[0,\infty)$ in
this framework gives a second order accurate scheme, but cubic splines with the
parabolic runout conditions at $t=0$ are fourth order accurate. We establish a
methodology for the stability analysis of VIEs and demonstrate that the new
methods are stable for non-smooth kernels which are related to convergence
analysis for TDBIEs, including the case of a Bessel function kernel oscillating
at frequency $O(1/h)$. Numerical results for VIEs and for TDBIE problems on
both open and closed surfaces confirm the theoretical predictions.


title:
Navier-Stokes equation and forward-backward stochastic differential
  system in the Besov spaces

abstract:
  The Navier-Stokes equation on Rd (d greater or equal to 3) formulated on
Besov spaces is considered. Using a stochastic forward-backward differential
system, the local existence of a unique solution in B_ r, with r > 1 + d is
obtained. We also show p,p p the convergence to solutions of the Euler equation
when the viscosity tends to zero. Moreover, we prove the local existence of a
unique solution in B_ pr,q, with p > 1, 1 greater or equal to q greater or
equal to infinity, r > max(1, d); here the maximal time interval depends on p
the viscosity.


title: On Guarded Transformation In The Modal Mu-Calculus

abstract:
  Guarded normal form requires occurrences of fixpoint variables in a
{\mu}-calculus-formula to occur under the scope of a modal operator. The
literature contains guarded transformations that effectively bring a
{\mu}-calculus-formula into guarded normal form. We show that the known guarded
transformations can cause an exponential blowup in formula size, contrary to
existing claims of polynomial behaviour. We also show that any polynomial
guarded transformation for {\mu}-calculus-formulas in the more relaxed
vectorial form gives rise to a polynomial solution algorithm for parity games,
the existence of which is an open problem. We also investigate transformations
between the {\mu}-calculus, vectorial form and hierarchical equation systems,
which are an alternative syntax for alternating parity tree automata.


title:
Minimum Common String Partition Parameterized by Partition Size is
  Fixed-Parameter Tractable

abstract:
  The NP-hard Minimum Common String Partition problem asks whether two strings
$x$ and $y$ can each be partitioned into at most $k$ substrings, called blocks,
such that both partitions use exactly the same blocks in a different order. We
present the first fixed-parameter algorithm for Minimum Common String Partition
using only parameter $k$.


title: The role of pions as virtual constituents of light bound states

abstract:
  We summarize recent results for the spectrum and properties of light
pseudoscalar and scalar hadrons in a functional approach to QCD using
Dyson-Schwinger and Bethe-Salpeter equations. We focus in particular on the
role of pions as virtual constituents in light mesons ('pion cloud effects') as
well as their role as constituents of tetraquark bound states. An extension of
our framework into the charm quark sector reveals an all-charm tetraquark in
the mass region around 5.5 GeV.


title: Associative and commutative tree representations for Boolean functions

abstract:
  Since the 90's, several authors have studied a probability distribution on
the set of Boolean functions on $n$ variables induced by some probability
distributions on formulas built upon the connectors $And$ and $Or$ and the
literals $\{x_{1}, \bar{x}_{1}, \dots, x_{n}, \bar{x}_{n}\}$. These formulas
rely on plane binary labelled trees, known as Catalan trees. We extend all the
results, in particular the relation between the probability and the complexity
of a Boolean function, to other models of formulas: non-binary or non-plane
labelled trees (i.e. Polya trees). This includes the natural tree class where
associativity and commutativity of the connectors $And$ and $Or$ are realised.


title: Forward physics with proton tagging at the LHC

abstract:
  We present some inclusive and exclusive diffractive processes to be studied
at the LHC, namely QCD, quartic anomalous couplings between $\gamma$ and $W/Z$
bosons and diffractive Higgs processes.


title: Smooth Big Bounce from Affine Quantization

abstract:
  We examine the possibility of dealing with gravitational singularities on a
quantum level through the use of coherent state or wavelet quantization instead
of canonical quantization. We consider the Robertson-Walker metric coupled to a
perfect fluid. It is the simplest model of a gravitational collapse and the
results obtained here may serve as a useful starting point for more complex
investigations in future. We follow a quantization procedure based on affine
coherent states or wavelets built from the unitary irreducible representation
of the affine group of the real line with positive dilation. The main issue of
our approach is the appearance of a quantum centrifugal potential allowing for
regularization of the singularity, essential self-adjointness of the
Hamiltonian, and unambiguous quantum dynamical evolution.


title:
Another dimension: investigations of molecular magnetism using muon-spin
  relaxation

abstract:
  We review examples of muon-spin relaxation measurements on molecule-based
magnetic coordination polymers, classified by their magnetic dimensionality.
These include the one-dimensional s=1/2 spin chain Cu(pyz)(NO3)2 and the
two-dimensional s=1/2 layered material [Cu(HF2)(pyz)2]BF4. We also describe
some of the more exotic ground states that may become accessible in the future
given the ability to tune the interaction strengths of our materials through
crystal engineering.


title: Entropy production in continuous phase space systems

abstract:
  We propose an alternative method to compute the entropy production of a
classical underdamped nonequilibrium system in a continuous phase space. This
approach has the advantage that it is not necessary to distinguish between even
and odd-parity variables. We show that the method leads to the same local
entropy production as in previous studies while the differential entropy
production along a stochastic trajectory turns out to be different. This
demonstrates that the differential entropy production in continuous phase space
systems is not uniquely defined.


title:
Absence of absolutely continuous spectrum for the Kirchhoff Laplacian on
  radial trees

abstract:
  In this paper we prove that the existence of absolutely continuous spectrum
of the Kirchhoff Laplacian on a radial metric tree graph together with a finite
complexity of the geometry of the tree implies that the tree is in fact
eventually periodic. This complements the results by Breuer and Frank in
\cite{BreuerFrank2009} in the discrete case as well as for sparse trees in the
metric case.


title:
Ground-State Energy and Condensate Density of a Dilute Bose Gas
  Revisited

abstract:
  The ground-state energy per particle $E/N$ and condensate density $n_0$ of a
dilute Bose gas are studied with a self-consistent perturbation expansion
satisfying the Hugenholtz-Pines theorem and conservation laws simultaneously. A
class of Feynman diagrams for the self-energy, which has escaped consideration
so far, is shown to add an extra constant $c_{ip}\sim O(1)$ to the expressions
reported by Lee, Huang, and Yang [Phys. Rev. 106, 1135 (1957) ] as
$E/N=(2\pi\hbar^2 an/m)[1+(128/15\sqrt{{\pi}}+16c_{ip}/5)\sqrt{{a^3n}}]$ and
$n_0/n=1-(8/3\sqrt{{\pi}}+c_{ip})\sqrt{{a^3n}}$, where $a$, $n$, and $m$ are
are the s-wave scattering length, particle density, and particle mass,
respectively. We present a couple of estimates for $c_{ip}$; the third-order
perturbation expansion yields $c_{ip}=0.412$.


title: Complex extension of Wigner's theorem

abstract:
  Wigner's theorem asserts that an isometric (probability conserving)
transformation on a quantum state space must be generated by a Hamiltonian that
is Hermitian. It is shown that when the Hermiticity condition on the
Hamiltonian is relaxed, we obtain the following complex generalisation of
Wigner's theorem: a holomorphically projective (complex geodesic-curves
preserving) transformation on a quantum state space must be generated by a
Hamiltonian that is not necessarily Hermitian.


title:
Doubling of the Algebra and Neutrino Mixing within Noncommutative
  Spectral Geometry

abstract:
  We study physical implications of the doubling of the algebra, an essential
element in the construction of the noncommutative spectral geometry model,
proposed by Connes and his collaborators as offering a geometric explanation
for the standard model of strong and electroweak interactions. Linking the
algebra doubling to the deformed Hopf algebra, we build Bogogliubov
transformations and show the emergence of neutrino mixing.


title: Spin-orbital frustration in pyrochlores A2Mo2O7

abstract:
  Electronic and magnetic properties of molybdenum pyrochlores A2Mo2O7 are
studied by the fully relativistic density-functional theory plus on-site
repulsion (U) method, with focusing on the spin-glass insulating material
Y2Mo2O7. We find that the system exhibits peculiar competition in energy
between different magnetic states in the large-U insulating region. The
magnetic competition cannot be explained by the conventional picture based on
the geometrical frustration of isotropic Heisenberg antiferromagnetic exchange
interactions. Through an analysis by using a generalized spin model, we find
that the effective spin interactions are distinct from the simple Heisenberg
form and strongly anisotropic in spin space. We also reveal that they give rise
to keen competition between antiferromagnetic and ferromagnetic states. The
complex form of the magnetic interactions indicates a crucial role of the
orbital degree of freedom. Analyzing a three-orbital Hubbard model, we clarify
that the magnetic competition is tightly connected with orbital frustration in
the 4d2 electronic configuration through the spin-orbital interplay. The
results challenge the conventional picture of the spin-glass behavior that
attributes the origin to the geometrical frustration of purely
antiferromagnetic exchange interactions.


title:
Stable and decaying bound states on the naked Reissner-Nordstr\"om
  background

abstract:
  We present a quantum mechanical study of the bound states of a neutral scalar
particle on the curved background described by the Reissner-Nordstr\"om (RN)
spacetime that corresponds to a naked singularity. We show that there occurs
both the metastable, \textit{i.e.} decaying bound states and the stable ones.
The corresponding energy spectra are calculated in the leading WKB
approximation and the comparison with the RN black hole quasinormal mode
spectrum is made. The metastable bound states on the naked singularity
background turn out to be more long-living than the quasinormal modes for the
black hole with the same mass.


title: Entropic measure and hypergraph states

abstract:
  We investigate some properties of the entanglement of hypergraph states in
purely hypergraph theoretical terms. We first introduce an approach for
computing local entropic measure on qubit t of a hypergraph state by using the
Hamming weight of the so-called t-adjacent subhypergraph. Then we quantify and
characterize the entanglement of hypergraph states in terms of local entropic
measures obtained by using the above approach. Our results show that a class of
n-qubit hypergraph states can not be converted into any graph state under local
unitary transformations.


title: Probing the nature of the Higgs-like Boson via h -> VF decays

abstract:
  We give a general decomposition of the h -> VF amplitude where V={W,Z} and F
is a generic leptonic or hadronic final state, in the standard model (SM), and
in the context of a general effective field theory. The differential
distributions for F=l^+l^-, l nu (l =e, mu) are reported, and we show how such
distributions can be used to determine modified Higgs couplings that cannot be
directly extracted from a global fit to Higgs signal strengths. We also
demonstrate how rare h -> VP decays, where P is a single hadron, with SM rates
in the 10^{-5} range, can be used to provide complementary information on the
couplings of the newly discovered Higgs-like scalar and are an interesting
probe of the vacuum structure of the theory.


title: Practical Implementation of Spatial Modulation

abstract:
  In this work we seek to characterise the performance of spatial modulation
(SM) and spatial multiplexing (SMX) with an experimental test bed. Two National
Instruments (NI)-PXIe devices are used for the system testing, one for the
transmitter and one for the receiver. The digital signal processing that
formats the information data in preparation of transmission is described along
with the digital signal processing that recovers the information data. In
addition, the hardware limitations of the system are also analysed. The average
bit error ratio (ABER) of the system is validated through both theoretical
analysis and simulation results for SM and SMX under line of sight (LoS)
channel conditions.


title: Spectral Classification Using Restricted Boltzmann Machine

abstract:
  In this study, a novel machine learning algorithm, restricted Boltzmann
machine (RBM), is introduced. The algorithm is applied for the spectral
classification in astronomy. RBM is a bipartite generative graphical model with
two separate layers (one visible layer and one hidden layer), which can extract
higher level features to represent the original data. Despite generative, RBM
can be used for classification when modified with a free energy and a soft-max
function. Before spectral classification, the original data is binarized
according to some rule. Then we resort to the binary RBM to classify
cataclysmic variables (CVs) and non-CVs (one half of all the given data for
training and the other half for testing). The experiment result shows
state-of-the-art accuracy of 100%, which indicates the efficiency of the binary
RBM algorithm.


title:
Special polynomials related to the supersymmetric eight-vertex model. I.
  Behaviour at cusps

abstract:
  We study certain symmetric polynomials, which as very special cases include
polynomials related to the supersymmetric eight-vertex model, and other
elliptic lattice models with $\Delta=\pm 1/2$. In this paper, which is the
first part of a series, we study the behaviour of the polynomials at special
parameter values, which can be identified with cusps of the modular group
$\Gamma_0(12)$. In subsequent papers, we will show that the polynomials satisfy
a non-stationary Schr\"odinger equation related to the
Knizhnik--Zamolodchikov--Bernard equation and that they give a four-dimensional
lattice of tau functions of Painlev\'e VI.


title: Magnetic dipole and electric quadrupole moments of the 229Th nucleus

abstract:
  We calculate the A and B hyperfine constants for the low-lying states of
229Th3+ using a high-precision relativistic all-order approach. By combining
these calculations with measurements of the 6d and 5f hyperfine constants [C.
J. Campbell et al., Phys. Rev. Lett. 106, 223001 (2011)], we determine the
magnetic dipole \mu=0.360(7)\mu_B and the electric-quadrupole Q=3.11(6) eb
moments of the 229Th nucleus. Our value for \mu is five times more accurate and
is 22% smaller than the best previous value \mu=0.46(4) \mu_B [S. Gerstenkorn
et al., J. Phys. (Paris) 35, 483 (1974)], while our value for Q is the same,
but 2.5 times more accurate than the 2011 result. A systematic study of
hyperfine structure in eight other monovalent atoms supports our claim of 2%
level uncertainty for $\mu$ and Q in 229Th+3.

categories: physics.atom-ph nucl-ex nucl-th physics.optics quant-ph


title:
GUI Based Automatic Remote Control of Gas Reduction System using PIC
  Microcontroller

abstract:
  The GRS is a one of the important units in Erbil Power Station EPS, which is
responsible on controlling gas pressure and gas temperature this unit
previously works manually. The local control panel for GRS system contains two
types of digital signals the first one indicated by Light Emitting Diodes LED
to point normal operations, fault and alarm, and event of operations while the
second indicated by ON-OFF switches, which consists of two types the push
buttons switch and mode selector switch. To overcome human in manual control
faults in controlling GRS systems, automation system becomes the best solution.
The purpose of this research is to design and implement embedded automation
system that can be used to control a GRS automatically through a GUI and from
remote location by using programmable interface controller (PIC16F877A). In
this research the (PIC) software which is based on (C language), developed by
Microchip (MPLAB) is used in programming a PIC microcontroller, then Visual
Basic is used in the construction of GUI, the RS-232 serial cable is used as a
connector between PIC and PC. Implement the proposed design and test it as a
first system shows all operations of GRS successful were converted into full
computerize controlling (with the ability of full automatic control) from
remote location through proposed GUI. Keywords-Peripheral Interface Controller
(PIC); Microcontroller; Graphical User Interface (GUI); Remote; Control.


title: Relative Interval Analysis of Paging Algorithms on Access Graphs

abstract:
  Access graphs, which have been used previously in connection with competitive
analysis and relative worst order analysis to model locality of reference in
paging, are considered in connection with relative interval analysis. The
algorithms LRU, FIFO, FWF, and FAR are compared using the path, star, and cycle
access graphs. In this model, some of the expected results are obtained.
However, although LRU is found to be strictly better than FIFO on paths, it has
worse performance on stars, cycles, and complete graphs, in this model. We
solve an open question from [Dorrigiv, Lopez-Ortiz, Munro, 2009], obtaining
tight bounds on the relationship between LRU and FIFO with relative interval
analysis.


title:
Cores in Classical Dwarf Spheroidal Galaxies? A Dispersion-Kurtosis
  Jeans Analysis Without Restricted Anisotropy

abstract:
  We attempt to measure the density of dark matter in the two Dwarf Spheroidal
Galaxies Fornax and Sculptor using a new method which employs Jeans equations
based on both the second and fourth moment of the Collisionless Boltzmann
Equation (i.e. variance and kurtosis of line of sight stellar velocities).
Unlike previous related efforts, we allow the anisotropy of the radial and
tangential second and fourth order moments to vary independently of each other.
We apply the method to simulated data and establish that to some degree it
appears to be able to break the degeneracies associated with second order only
Jeans analyses. When we apply the technique to real data, we see no huge
improvement in our understanding of the inner density of Fornax, which can
still be fit by either a quite cuspy or cored density profile. For Sculptor
however we find that the technique suggests that the data is incompatible with
a steep profile and a cored profile seems more consistent. As well as
presenting these new results and comparing them to other estimates in the
literature, we try to understand why the technique is more effective in one
system than the other.


title: Exploring local fNL estimators based on the binned bispectrum

abstract:
  We explore different estimators of the local non-linear coupling parameter,
fNL, based on the binned bispectrum presented in Bucher et al. Using
simulations of Wilkinson Microwave Anisotropy Probe (WMAP)-7yr data, we compare
the performance of a regression neural network with a \chi^2-minimization and
study the dependence of the results on the presence of the linear term in the
analysis and on the use of inpainting for masked regions. Both methods obtain
similar results and are robust to the use of inpainting, but the neural network
estimator converges considerably faster. We also examine the performance of a
simplified \chi^2 estimator that assumes a diagonal matrix and has the linear
term subtracted, which considerably reduces the computational time; in this
case inpainting is found to be crucial. The estimators are also applied to real
WMAP-7yr data, yielding constraints at 95% confidence level of -3< fNL <83.


title:
Neutron collimator design of neutron radiography based on the BNCT
  facility

abstract:
  For the research of CCD neutron radiography, a neutron collimator was
designed based on the exit of thermal neutron of the Boron Neutron Capture
Therapy (BNCT) reactor. Based on the Geant4 simulations, the preliminary choice
of the size of the collimator was determined. The materials were selected
according to the literature data. Then, a collimator was constructed and tested
on site. The results of experiment and simulation show that the thermal neutron
flux at the end of theneutron collimator is greater than 10^6 n/cm^2/s, the
maximum collimation ratio (L/D) is 58, the Cd-ratio(Mn) is 160 and the diameter
of collimator end is 10 cm. This neutron collimator is considered to be
applicable for neutron radiography.


title:
Optimal Productivity of Succoring Patients System using Mobile GIS Based
  on WCF Technology

abstract:
  Depending on references of the World Health Organization there is large
numbers of sick persons with different diseases worldwide, and without succor
at a suitable time this could lead to fatality of the patients. This paper
offers a succoring system controlled by the patient based on the location of
patients. The proposed system is the first tracking system using mobile GIS
based on WCF technology to offer online succoring (24 hour a day), but really
works only when the patient sends request for succoring. The patients will send
a request (SMS by click one button) contains his ID, Longitude and Latitude via
GPRS network to a web server containing a database, which the patient was
registered previously on it. Then the server will locate the patient on Google
map and retrieve the patient's information from the database. This information
will be used by the server to send succoring facility and notify the nearest
and most suitable ESC; moreover, the server will send SMS over IP to inform the
patient emergency contacts and emergency hospital. The optimal productivity for
proposed succoring system appears in handling a large number of requests within
short period at rate of one request/need succoring per sec as result of using
mobile GIS based on WCF technology. Furthermore, the process of request and
reply for emergency cases of the patients achieved in costeffective way due to
this technology, which allow sending data (SMS over IP) via Internet using GPRS
network. The proposed system can be implemented in a minimum configuration
(hardware and software) to minimize the overall cost of operation and
manufacturing. Keywords- WCF; WPF; Build-in GPS; GPRS; Mobile GIS; SoIP;
Tracking System; Google Maps API.


title: LZ-Compressed String Dictionaries

abstract:
  We show how to compress string dictionaries using the Lempel-Ziv (LZ78) data
compression algorithm. Our approach is validated experimentally on dictionaries
of up to 1.5 GB of uncompressed text. We achieve compression ratios often
outperforming the existing alternatives, especially on dictionaries containing
many repeated substrings. Our query times remain competitive.


title: The study of Borromean halo nuclei by the neutron wall with simulation

abstract:
  The model of three-body Borromean halo nuclei breakup was described by using
standard phase space distributions and the Monte Carlo simulation method was
established to resolve the detection problem of two neutrons produced from
breakup reaction on the neutron wall detector. For $^{6}$He case, overall
resolution $\sigma_{E_{k}}$ for the Gaussian part of the detector response and
the detection efficiency including solid angle acceptance with regard to the
excitation energy $E_{k}$ are obtained by the simulation of two neutrons from
$^{6}$He breakup into the neutron wall. The effects of the algorithm on the
angular and energy correlations of the fragments are briefly discussed.


title:
Hybrid RHF/MP2 geometry optimizations with the Effective Fragment
  Molecular Orbital Method

abstract:
  The frozen domain effective fragment molecular orbital method is extended to
allow for the treatment of a single fragment at the MP2 level of theory. The
approach is applied to the conversion of chorismate to prephenate by chorismate
mutase, where the substrate is treated at the MP2 level of theory while the
rest of the system is treated at the RHF level. MP2 geometry optimization is
found to lower the barrier by up to 3.5 kcal/mol compared to RHF optimzations
and ONIOM energy refinement and leads to a smoother convergence with respect to
the basis set for the reaction profile. For double zeta basis sets the increase
in CPU time relative to RHF is roughly a factor of two.


title: Observation of a low-lying neutron-unbound state in 19C

abstract:
  Proton removal reactions from a secondary 22N beam were utilized to populate
unbound states in neutron-rich carbon isotopes. Neutrons were measured with the
Modular Neutron Array (MoNA) in coincidence with carbon fragments. A resonance
with a decay energy of 76(14) keV was observed in the system 18C+n
corresponding to a state in 19C at an excitation energy of 653(95)keV. This
resonance could correspond to the first 5/2+ state which was recently
speculated to be unbound in order to describe 1n and 2n removal cross section
measurements from 20C.


title: Curvature and partial hyperbolicity

abstract:
  Using quadratic forms, we stablish a criteria to relate the curvature of a
Riemannian manifold and partial hyperbolicity of its geodesic flow. We show
some examples which satisfy the criteria and another which does not satisfy it
but still has a partially hyperbolic geodesic flow.


title:
Equivariant categories from categorical group actions on monoidal
  categories

abstract:
  G-equivariant modular categories provide the input for a standard method to
construct 3d homotopy field theories. Virelizier constructed a G-equivariant
category from the action of a group G on a Hopf algebra H by Hopf algebra
automorphisms. The neutral component of his category is the Drinfeld center of
the category of H-modules. We generalize this construction to weak actions of a
group G on an arbitrary monoidal category C by (possibly non-strict) monoidal
auto-equivalences and obtain a G-equivariant category with neutral component
the Drinfeld center of C.