title: Full duplex communication using visible light

abstract:
  In this work, we propose, fabricate and characterize a full duplex
communication system using visible light on a single chip. Both the suspended
p-n junction InGaN/GaN multiple quantum well (MQW) devices and the suspended
waveguides are obtained on a GaN-on-silicon platform by wafer-level processing.
Two suspended p-n junction InGaN/GaN MQW devices that can both emit and detect
light simultaneously are connected using suspended waveguides to form an
in-plane visible light communication (VLC) system. The light that is emitted
from one suspended p-n junction InGaN/GaN MQW device can induce a current in
the device located at the other end of the waveguide via in-plane light
coupling, thus leading to full duplex communication using visible light. This
proof-of-concept in-plane VLC system paves the way towards the implementation
of a full duplex communications system operating at the same frequency using
visible light on a single chip.


title:
An action principle of classical irreversible thermodynamics -
  Irreversible thermodynamic cycles and embodied bits of information

abstract:
  Despite its simplicity, it seems to my best of knowledge that the possibly
simplest approach towards deriving equations governing irreversible
thermodynamics from gas-kinetic considerations within the framework of
classical mechanics has never been pursued. In this paper we address this
omission and derive the equations describing the irreversible thermodynamics of
a gas in a piston and associated thermodynamic cycles performed in finite time.
What we find is a thermodynamic action principle: The irreversible work we
require for performing a thermodynamic cycle in finite time times the time we
require to run through the cycle, a isothermal compression/decompression cycle
for instance, will always be larger or equal to a lower bound given by a system
specific constant with the dimension of an action. This process specific action
constants can take values of the order of Plank's constant for microscopic
processes, such as displacing a Hydrogen atom by one atom diameter. For
macroscopic processes (e.g. a bicycle pump) also the action constant takes
macroscopically observable values. We discuss the finite time Carnot cycle, and
estimate the lower bound for irreversible work required when rewriting
physically embodied bits of information and compare the resulting values with
Landauer's bond, the irreversible amount of energy that needs to be dissipated
for re-writing a bit.


title:
A Strong Baseline for Learning Cross-Lingual Word Embeddings from
  Sentence Alignments

abstract:
  While cross-lingual word embeddings have been studied extensively in recent
years, the qualitative differences between the different algorithms remain
vague. We observe that whether or not an algorithm uses a particular feature
set (sentence IDs) accounts for a significant performance gap among these
algorithms. This feature set is also used by traditional alignment algorithms,
such as IBM Model-1, which demonstrate similar performance to state-of-the-art
embedding algorithms on a variety of benchmarks. Overall, we observe that
different algorithmic approaches for utilizing the sentence ID feature space
result in similar performance. This paper draws both empirical and theoretical
parallels between the embedding and alignment literature, and suggests that
adding additional sources of information, which go beyond the traditional
signal of bilingual sentence-aligned corpora, may substantially improve
cross-lingual word embeddings, and that future baselines should at least take
such features into account.


title:
Semiclassical basis sets for the computation of molecular vibrational
  states

abstract:
  In this paper, we extend a method recently reported [Phys. Rev. E 87, 042921
(2012)] for the calculation of the eigestates of classically highly chaotic
systems to cases of mixed dynamics, i.e. those presenting regular and irregular
motions at the same energy. The efficiency of the method, which is based on the
use of a semiclassical basis set of localized wave functions, is demonstrated
by applying it to the determination of the vibrational states of a realistic
molecular system, namely the LiCN molecule.


title:
Modelling the covariance structure in marginal multivariate count
  models: Hunting in Bioko Island

abstract:
  We present a flexible statistical modelling framework to deal with
multivariate count data along with longitudinal and repeated measures
structures. The covariance structure for each response variable is defined in
terms of a covariance link function combined with a matrix linear predictor
involving known matrices. To specify the joint covariance matrix for the
multivariate response vector the generalized Kronecker product is employed. The
count nature of the data is taken into account by means of the power dispersion
function associated with the Poisson-Tweedie distribution. Furthermore, the
score information criterion is extended for selecting the components of the
matrix linear predictor. We analyse a dataset consisting of prey animals (the
main hunted species, the blue duiker \textit{Philantomba monticola} and other
taxa) shot or snared for bushmeat by $52$ commercial hunters over a $33$-month
period in Pico Basil\'e, Bioko Island, Equatorial Guinea. By taking into
account the severely unbalanced repeated measures and longitudinal structures
induced by the hunters and a set of potential covariates (which in turn affect
the mean and covariance structures), our method can be used to indicate whether
there was statistical evidence of a decline in blue duikers and other species
hunted during the study period. Determining whether observed drops in the
number of animals hunted are indeed true is crucial to assess whether species
depletion effects are taking place in exploited areas anywhere in the world. We
suggest that our method can be used to more accurately understand the
trajectories of animals hunted for commercial or subsistence purposes, and
establish clear policies to ensure sustainable hunting practices.


title:
Looking for blazars in a sample of unidentified high-energy emitting
  Fermi sources

abstract:
  Context. Based on their overwhelming dominance among associated Fermi gamma
ray catalogue sources, it is expected that a large fraction of the unidentified
Fermi objects are blazars. Through crossmatching between the positions of
unidentified gamma ray sources from the First Fermi Catalog of gamma ray
sources emitting above 10 GeV (1FHL) and the ROSAT and Swift XRT catalogues of
X ray objects and between pointed XRT observations, a sample of 36 potential
associations was found in previous works with less than 15 arcsec of positional
offset. One third of them have recently been classified; the remainder, though
believed to belong to the blazar class, still lack spectroscopic
classifications. Aims. We study the optical spectrum of the putative
counterparts of these unidentified gamma ray sources in order to find their
redshifts and to determine their nature and main spectral characteristics.
Methods. An observational campaign was carried out on the putative counterparts
of 13 1FHL sources using medium resolution optical spectroscopy from the
Osservatorio Astronomico di Bologna in Loiano, Italy; the Telescopio Nazionale
Galileo and the Nordic Optical Telescope, both in the Canary Islands, Spain;
and the Observatorio Astronomico Nacional San Pedro Martir in Baja California,
Mexico. Results. We were able to classify 14 new objects based on their
continuum shapes and spectral features. Conclusions. Twelve new blazars were
found, along with one new quasar and one new narrow line Seyfert 1 (NLS1) to be
potentially associated with the 1FHL sources of our sample. Redshifts or lower
limits were obtained when possible alongside central black hole mass and
luminosity estimates for the NLS1 and the quasar.


title: Entropy Jumps for Radially Symmetric Random Vectors

abstract:
  We establish a quantitative bound on the entropy jump associated to the sum
of independent, identically distributed (IID) radially symmetric random vectors
having dimension greater than one. Following the usual approach, we first
consider the analogous problem of Fisher information dissipation, and then
integrate along the Ornstein-Uhlenbeck semigroup to obtain an entropic
inequality. In a departure from previous work, we appeal to a result by
Desvillettes and Villani on entropy production associated to the Landau
equation. This obviates strong regularity assumptions, such as presence of a
spectral gap and log-concavity of densities, but comes at the expense of radial
symmetry. As an application, we give a quantitative estimate of the deficit in
the Gaussian logarithmic Sobolev inequality for radially symmetric functions.


title:
Links between the Logarithmic Sobolev Inequality and the convolution
  inequalities for Entropy and Fisher Information

abstract:
  Relative to the Gaussian measure on $\mathbb{R}^d$, entropy and Fisher
information are famously related via Gross' logarithmic Sobolev inequality
(LSI). These same functionals also separately satisfy convolution inequalities,
as proved by Stam. We establish a dimension-free inequality that interpolates
among these relations. Several interesting corollaries follow: (i) the deficit
in the LSI satisfies a convolution inequality itself; (ii) the deficit in the
LSI controls convergence in the entropic and Fisher information central limit
theorems; and (iii) the LSI is stable with respect to HWI jumps (i.e., a jump
in any of the convolution inequalities associated to the HWI functionals).
  Another consequence is that the convolution inequalities for Fisher
information and entropy powers are reversible in general, up to a factor
depending on the Stam defect. An improved form of Nelson's hypercontractivity
estimate also follows. Finally, we speculate on the possibility of an analogous
reverse Brunn-Minkowski inequality and a related upper bound on surface area
associated to Minkowski sums.


title:
A functorial Dowker theorem and persistent homology of asymmetric
  networks

abstract:
  We study two methods for computing network features with topological
underpinnings: the Rips and Dowker persistent homology diagrams. Our
formulations work for general networks, which may be asymmetric and may have
any real number as an edge weight. We study the sensitivity of Dowker
persistence diagrams to asymmetry via numerous theoretical examples, including
a family of highly asymmetric cycle networks that have interesting connections
to the existing literature. In particular, we characterize the Dowker
persistence diagrams arising from asymmetric cycle networks. We investigate the
stability properties of both the Dowker and Rips persistence diagrams, and use
these observations to run a classification task on a dataset comprising
simulated hippocampal networks. Our theoretical and experimental results
suggest that Dowker persistence diagrams are particularly suitable for studying
asymmetric networks. As a stepping stone for our constructions, we prove a
functorial generalization of a theorem of Dowker, after whom our constructions
are named.


title:
Comment on "Enhanced Diffusion of Enzymes that Catalyze Exothermic
  Reactions" by R.Golestanian

abstract:
  We (Riedel et al. Nature 2015), as well as others, have showed that some
enzymes exhibit enhanced diffusion when active. In a recent PRL, (Golestanian,
PRL 2015, arXiv:1508.03219) R.Golestanian theoretically examines a number of
possible explanations for this phenomenon and concludes that "collective
heating" is the best candidate to account for the observed diffusion
coefficient increase. Here we present evidence showing that collective heating
cannot possibly apply to our experiments.


title: The coronal evolution of pre-main-sequence stars

abstract:
  The bulk of X-ray emission from pre-main-sequence (PMS) stars is coronal in
origin. We demonstrate herein that stars on Henyey tracks in the
Hertzsprung-Russell diagram have lower $\log(L_X/L_\ast)$, on average, than
stars on Hayashi tracks. This effect is driven by the decay of $L_X$ once stars
develop radiative cores. $L_X$ decays faster with age for intermediate mass PMS
stars, the progenitors of main sequence A-type stars, compared to those of
lower mass. As almost all main sequence A-type stars show no detectable X-ray
emission, we may already be observing the loss of their coronae during their
PMS evolution. Although there is no direct link between the size or mass of the
radiative core and $L_X$, the longer stars have spent with partially convective
interiors, the weaker their X-ray emission becomes. This conference paper is a
synopsis of Gregory, Adams and Davies (2016).


title:
On the probability of co-primality of two natural numbers chosen at
  random (Who was the first to pose and solve this problem?)

abstract:
  The article attempts to demonstrate the rich history of one truly remarkable
problem situated at the confluence of probability theory and theory of numbers
- finding the probability of co-primality of two randomly selected natural
numbers. The goal of the article is to reveal the genesis of the problem and
understand the role of mathematicians of the past in solving this problem and
using it as a background for advancing mathematical ideas. The article
describes different approaches to the solution of the problem, reviews its
various generalizations, examines similar problems, and offers diverse
historical perspectives.


title:
First application of superconducting transition-edge-sensor
  microcalorimeters to hadronic-atom x-ray spectroscopy

abstract:
  High-resolution pionic-atom x-ray spectroscopy was performed with an x-ray
spectrometer based on a 240-pixel array of superconducting
transition-edge-sensor (TES) microcalorimeters at the piM1 beam line of the
Paul Scherrer Institute. X-rays emitted by pionic carbon via the 4f->3d
transition and the parallel 4d->3p transition were observed with a
full-width-at-half-maximum energy resolution of 6.8 eV at 6.4 keV. Measured
x-ray energies are consistent with calculated electromagnetic values which
considered the strong-interaction effect assessed via the Seki-Masutani
potential for the 3p energy level, and favor the electronic population of two
filled 1s electrons in the K-shell. Absolute energy calibration with an
uncertainty of 0.1 eV was demonstrated under a high-rate hadron beam condition
of 1.45 MHz. This is the first application of a TES spectrometer to
hadronic-atom x-ray spectroscopy and is an important milestone towards
next-generation high-resolution kaonic-atom x-ray spectroscopy.

categories: physics.ins-det nucl-ex nucl-th physics.atom-ph


title: Spin drift and diffusion in one- and two-subband helical systems

abstract:
  The theory of spin drift and diffusion in two-dimensional electron gases is
developed in terms of a random walk model incorporating Rashba, linear and
cubic Dresselhaus, and intersubband spin-orbit couplings. The additional
subband degree of freedom introduces new characteristics to the persistent spin
helix (PSH) dynamics. As has been described before, for negligible intersubband
scattering rates, the sum of the magnetization of independent subbands leads to
a checkerboard pattern of crossed PSHs with long spin lifetime. For strong
intersubband scattering we model the fast subband dynamics as a new random
variable, yielding a dynamics set by averaged spin-orbit couplings of both
subbands. In this case the crossed PSH becomes isotropic, rendering circular
(Bessel) patterns with short spin lifetime. Additionally, a finite drift
velocity breaks the symmetry between parallel and transverse directions,
distorting and dragging the patterns. We find that the maximum spin lifetime
shifts away from the PSH regime with increasing drift velocity. We present
approximate analytical solutions for these cases and define their domain of
validity. Effects of magnetic fields and initial package broadening are also
discussed.


title:
A reaction network approach to the convergence to equilibrium of quantum
  Boltzmann equations for Bose gases

abstract:
  When the temperature of a trapped Bose gas is below the Bose-Einstein
transition temperature and above absolute zero, the gas is composed of two
distinct components: the Bose-Einstein condensate and the cloud of thermal
excitations. The dynamics of the excitations can be described by quantum
Boltzmann models. We establish a connection between quantum Boltzmann models
and chemical reaction networks. We prove that the discrete differential
equations for these quantum Boltzmann models converge to an equilibrium point.
Moreover, this point is unique for all initial conditions that satisfy the same
conservation laws. In the proof, we then employ a toric dynamical system
approach, similar to the one used to prove the global attractor conjecture, to
study the convergence to equilibrium of quantum kinetic equations, derived in
[49,50].


title: Evacuation dynamics of asymmetrically coupled pedestrian pairs

abstract:
  We propose and analyze extended floor field cellular automaton models for
evacuation dynamics of inhomogeneous pedestrian pairs which are coupled by
asymmetric group interactions. Such pairs consist of a leader, who mainly
determines the couple's motion and a follower, who has a defined tendency to
follow the leader. Examples for such pairs are mother and child or two siblings
of different age. We examine the system properties and compare them to the case
of a homogeneous crowd. We find a strong impact on evacuation times for the
regime of strong pair coupling due to the occurrence of a clogging phenomenon.
In addition we obtain a non-trivial dependence of evacuation times on the
followers' coupling to the static floor field, which carries the information of
the shortest way to the exit location. In particular we find that systems with
fully passive followers, who are solely coupled to their leaders, show lower
evacuation times than homogeneous systems where all pedestrians have an equal
tendency to move towards the exit. We compare the results of computer
simulations with recently performed experiments.


title:
Papers presented at the 32nd International Conference on Logic
  Programming (ICLP 2016)

abstract:
  This is the list of the full papers accepted for presentation at the 32nd
International Conference on Logic Programming, New York City, USA, October
18-21, 2016.
  In addition to the main conference itself, ICLP hosted four pre-conference
workshops, the Autumn School on Logic Programing, and a Doctoral Consortium.
  The final versions of the full papers will be published in a special issue of
the journal Theory and Practice of Logic Programming (TPLP). We received eighty
eight abstract submissions, of which twenty seven papers were accepted for
publication as TPLP rapid communications.
  Papers deemed of sufficiently high quality to be presented as the conference,
but not enough to be appear in TPLP, will be published as Technical
Communications in the OASIcs series. Fifteen papers fell into this category.


title:
V-T theory for the Self-Intermediate Scattering Function in a Monatomic
  Liquid

abstract:
  In V-T theory the atomic motion is harmonic vibrations in a liquid-specific
potential energy valley, plus transits, which move the system rapidly among the
multitude of such valleys. In its first application to the self intermediate
scattering function (SISF), V-T theory produced an accurate account of
molecular dynamics (MD) data at all wave numbers q and time t. Recently,
analysis of the mean square displacement (MSD) resolved a crossover behavior
that was not observed in the SISF study. Our purpose here is to apply the more
accurate MSD calibration to the SISF, and assess the results. We derive and
discuss the theoretical equations for vibrational and transit contributions to
the SISF. The time evolution is divided into three successive intervals: the
vibrational interval when the vibrational contribution alone accurately
accounts for the MD data; the crossover when the vibrational contribution
saturates and the transit contribution becomes resolved; and the diffusive
interval when the transit contribution alone accurately accounts for the MD
data. The resulting theoretical error is extremely small at all q and t.
Comparison of V-T and mode-coupling theories for the MSD and SISF reveals that,
while their formulations differ substantially, their underlying atomic motions
are in logical correspondence.


title: Semantic Understanding of Scenes through the ADE20K Dataset

abstract:
  Scene parsing, or recognizing and segmenting objects and stuff in an image,
is one of the key problems in computer vision. Despite the community's efforts
in data collection, there are still few image datasets covering a wide range of
scenes and object categories with dense and detailed annotations for scene
parsing. In this paper, we introduce and analyze the ADE20K dataset, spanning
diverse annotations of scenes, objects, parts of objects, and in some cases
even parts of parts. A generic network design called Cascade Segmentation
Module is then proposed to enable the segmentation networks to parse a scene
into stuff, objects, and object parts in a cascade. We evaluate the proposed
module integrated within two existing semantic segmentation networks, yielding
significant improvements for scene parsing. We further show that the scene
parsing networks trained on ADE20K can be applied to a wide variety of scenes
and objects.


title:
The new interaction suggested by the anomalous $^8$Be transition sets a
  rigorous constraint on the mass range of dark matter

abstract:
  The WIMPs are considered one of the favorable dark matter (DM) candidates,
but as the upper bounds on the interactions between DM and standard model (SM)
particles obtained by the upgraded facilities of DM direct detections get lower
and lower. Researchers turn their attentions to search for less massive DM
candidates, i.e. light dark matter of MeV scale. The recently measured
anomalous transition in $^8$Be suggests that there exists a vectorial boson
which may mediate the interaction between DM and SM particles. Based on this
scenario, we combine the relevant cosmological data to constrain the mass range
of DM, and have found that there exists a model parameter space where the
requirements are satisfied, a range of $10.4 \lesssim m_{\phi} \lesssim $ 16.7
MeV for scalar DM, and $13.6 \lesssim m_{V} \lesssim $ 16.7 MeV for vectorial
DM is demanded. Then a possibility of directly detecting such light DM
particles via the DM-electron scattering is briefly studied in this framework.


title: A Model of Navigation History

abstract:
  Navigation has been a core component of the web since its inception: users
and scripts can follow hyperlinks, and can go back or forwards through the
navigation history. In this paper, we present a formal model aligned with the
WHATWG specification of navigation history, and investigate its properties. The
fundamental property of navigation history is that traversing the history by
delta then by delta' should be the same as traversing by delta+delta'. In
particular, traversing by +1 (forward) then by -1 (back) is the same as
traversing by 0 (doing nothing). We show that the specification-aligned model
does not satisfy this property, by exhibiting a series of counter-examples,
which motivate four patches to the model. We present a series of experiments,
showing that browsers are inconsistent in their implementation of navigation
history, but that their behaviour is closer to the patched model than to the
specification-aligned model. We propose patches to the specification to align
it with the patched model.


title: A Reconfigurable FIR Filter with Memristor-Based Weights

abstract:
  We report on experimental demonstration of a mixed-signal 6-tap
finite-impulse response (FIR) filter in which weights are implemented with
titanium dioxide memristive devices. In the proposed design weight of a tap is
stored with a relatively high precision in a memristive device that can be
configured in field. Such approach enables efficient implementation of the most
critical operation of an FIR filter, i.e. multiplication of the input signal
with the tap weights and summation of the products from taps, in analog domain.
As a result, the proposed design, when implemented with fully integrated hybrid
CMOS/memristor circuit, is expected to be much more compact and energy
efficient as compared to the state-of-the-art approaches.


title:
Precise Clustering and Density Evolution of redMaPPer Galaxy Clusters
  versus MXXL Simulation

abstract:
  We construct a large, redshift complete sample of distant galaxy clusters by
correlating Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12) redshifts
with clusters identified with the red-sequence Matched-filter Probabilistic
Percolation (redMaPPer) algorithm. Our spectroscopic completeness is 97% for ~
7,000 clusters within the redMaPPer selection limit, $z \leqslant$ 0.325, so
that our cluster correlation functions are much more precise than earlier work
and not suppressed by photometric redshifts. We derive an accurate power-law
mass-richness relation from the observed abundance with respect to the mass
function from Millennium XXL (MXXL) simulation, adjusted to the Planck weighted
cosmology. The number density of clusters is found to decline by 20% over the
range 0.1 $< z <$ 0.3, in good agreement with the evolution predicted by MXXL.
Our projected three-dimensional correlation function scales with richness,
$\lambda$, rising from $r_0=$ 14 h$^{-1}$ Mpc at $\lambda\simeq$ 25, to $r_0=$
22 h$^{-1}$ Mpc at $\lambda\simeq$ 60, with a gradient that matches MXXL when
applying our mass-richness relation, whereas the observed amplitude of the
correlation function at $\left<z\right>=$ 0.24 exceeds the MXXL prediction by
20% at the $\simeq$ 2.5$\sigma$ level. This tension cannot be blamed on
spurious, randomly located clusters as this would reduce the correlation
amplitude. Full consistency between the correlation function and the abundances
is achievable for the pre-Planck values of $\sigma_8=$ 0.9, $\Omega_m=$ 0.25,
and h = 0.73, matching the improved distance ladder estimate of the Hubble
constant.


title: Bound muon decay spectrum in the leading logarithmic accuracy

abstract:
  We compute the dominant, logarithmically enhanced radiative corrections to
the electron spectrum in the bound muon decay in the whole experimentally
interesting range. The corrected spectrum fits well the TWIST results. The
remaining theoretical error, dominated by the nuclear charge distribution, can
be reduced in the muon-electron conversion searches by measuring the spectrum
slightly below the New Physics signal window.


title: Nonlinear Roth type theorems in finite fields

abstract:
  We obtain smoothing estimates for certain nonlinear convolution operators on
prime fields, leading to quantitative nonlinear Roth type theorems. Compared
with the usual linear setting (i.e. arithmetic progressions), the nonlinear
nature of the operators leads to different phenomena, both qualitatively and
quantitatively.


title: Arithmetic progressions in multiplicative groups of finite fields

abstract:
  Let $G$ be a multiplicative subgroup of the prime field $\mathbb F_p$ of size
$|G|> p^{1-\kappa}$ and $r$ an arbitrarily fixed positive integer. Assuming
$\kappa=\kappa(r)>0$ and $p$ large enough, it is shown that any proportional
subset $A\subset G$ contains non-trivial arithmetic progressions of length $r$.
The main ingredient is the Szemer\'{e}di-Green-Tao theorem.


title:
Columnar Shifts as Symmetry-Breaking Degrees of Freedom in Molecular
  Perovskites

abstract:
  We introduce columnar shifts---collective rigid-body translations---as a
structural degree of freedom relevant to the phase behaviour of molecular
perovskites ABX$_{\textrm3}$ (X = molecular anion). Like the well-known
octahedral tilts of conventional perovskites, shifts also preserve the
octahedral coordination geometry of the B-site cation in molecular perovskites,
and so are predisposed to influencing the low-energy dynamics and displacive
phase transitions of these topical systems. We present a qualitative overview
of the interplay between shift activation and crystal symmetry breaking, and
introduce a generalised terminology to allow characterisation of simple shift
distortions, drawing analogy to the "Glazer notation" for octahedral tilts. We
apply our approach to the interpretation of a representative selection of azide
and formate perovskite structures, and discuss the implications for functional
exploitation of shift degrees of freedom in negative thermal expansion
materials and hybrid ferroelectrics.


title:
Studying Relation Between Star Formation and Molecular Clumps on
  Subparsec Scales in 30 Doradus

abstract:
  We present $\mathrm{^{12}CO}$ and $\mathrm{^{13}CO}$ molecular gas data
observed by ALMA, massive early stage young stellar objects identified by
applying color-magnitude cuts to \textit{Spitzer} and \textit{Herschel}
photometry, and low-mass late stage young stellar objects identified via
H$\mathrm{\alpha}$ excess. Using dendrograms, we derive properties for the
molecular cloud structures. This is the first time a dendrogram analysis has
been applied to extragalactic clouds. The majority of clumps have a virial
parameter equal to unity or less. The size-linewidth relations of
$\mathrm{^{12}CO}$ and $\mathrm{^{13}CO}$ show the clumps in this study have a
larger linewidth for a given size (by factor of 3.8 and 2.5, respectively) in
comparison to several, but not all, previous studies. The larger linewidths in
30 Doradus compared to typical Milky Way quiescent clumps are probably due to
the highly energetic environmental conditions of 30 Doradus. The slope of the
size-linewidth relations of $\mathrm{^{12}CO}$, 0.65 $\pm$ 0.04, and
$\mathrm{^{13}CO}$, 0.97 $\pm$ 0.12, are on the higher end but consistent
within 3$\mathrm{\sigma}$ of previous studies. Massive star formation occurs in
clumps with high masses ($> 1.83 \times 10^{2}\;\mathrm{M_{\odot}}$), high
linewidths (v $> 1.18\;\mathrm{km/s}$), and high mass densities ($> 6.67 \times
10^{2}\;\mathrm{M_{\odot}\;pc^{-2}}$). The majority of embedded, massive young
stellar objects are associated with a clump. However the majority of more
evolved, low-mass young stellar objects are not associated with a clump.


title: Stellar activity with LAMOST. I. Spot configuration in Pleiades

abstract:
  We use the spectra of Pleiades and field stars from LAMOST DR2 archive to
study how spottedness and activity vary as a function of mass at young ages. We
obtained standard TiO band strength by measuring TiO bands near 7050 $\AA$ from
LAMOST spectra (R$\approx$1800) for large sample of field GKM dwarfs with solar
metallicity. Analysis show that active dwarfs, including late G- and early
K-type, have extra TiO absorption compare to inactive counterparts, indicating
the presence of cool spots on their surface. Active late K- and M-dwarfs show
deeper TiO2 and shallower TiO4 compare to inactive stars at a given TiO5, which
could be partly explained through cool spots. We estimated cool spot fractional
coverage for 304 Pleiades candidates by modelling their TiO2 (&TiO5) band
strength with respect to standard value. Results show that surface of large
fraction of K- and M-type members have very large spot coverage ($\sim$50%). We
analysed a correlation between spot coverage, rotation and the amplitude of
light variation, and found spot coverage on slow rotators ($R_{o}$ > 0.1)
increases with decreasing Rossby Number $R_{o}$. Interestingly, we detected a
saturation-like feature for spot coverage in fast rotators with a saturation
level of 40%-50%. In addition, spot distribution in hotter fast rotators show
more symmetrical compare to slow rotators. More interestingly, we detected
large spot coverage in many M type members with no or little light variation.
In bigger picture, these results provide important constraints for stellar
dynamo on these cool active stars.


title: Modified affine Hecke algebras and quiver Hecke algebras of type $A$

abstract:
  We introduce some modified forms for the degenerate and non-degenerate affine
Hecke algebras of type $A$. These are certain subalgebras living inside the
inverse limit of cyclotomic Hecke algebras. We construct faithful
representations and standard bases for these algebras and give some explicit
description of their centers. We show that there are algebra isomorphisms
between some generalized Ore localizations of these modified affine Hecke
algebras and of the quiver Hecke algebras of type $A$. As an application, we
show that the center conjecture for the cyclotomic quiver Hecke algebra of type
$A$ holds if and only if the center conjecture for the cyclotomic Hecke algebra
of type $A$ holds.


title: Complete integrability of the parahoric Hitchin system

abstract:
  Let $\mathcal{G}$ be a parahoric group scheme over a complex projective curve
$X$ of genus greater than one. Let $\mathrm{Bun}_{\mathcal{G}}$ denote the
moduli stack of $\mathcal{G}$-torsors on $X$. We prove several results
concerning the Hitchin map on $T^*\!\mathrm{Bun}_{\mathcal{G}}$. We first show
that the parahoric analogue of the global nilpotent cone is isotropic and use
this to prove that $\mathrm{Bun}_{\mathcal{G}}$ is "very good" in the sense of
Beilinson-Drinfeld. We then prove that the parahoric Hitchin map is a Poisson
map whose generic fibres are abelian varieties. Together, these results imply
that the parahoric Hitchin map is a completely integrable system.


title: Finite thermal reservoirs and the canonical distribution

abstract:
  The microcanonical ensemble has long been a starting point for the
development of thermodynamics from statistical mechanics. However, this
approach presents two problems. First, it predicts that the entropy is only
defined on a discrete set of energies for finite, quantum systems, while
thermodynamics requires the entropy to be a continuous function of the energy.
Second, it fails to satisfy the stability condition ($\Delta S / \Delta U < 0$)
for first-order transitions with both classical and quantum systems. Swendsen
has recently shown that the source of these problems lies in the microcanonical
ensemble itself, which contains only energy eigenstates and excludes their
linear combinations. To the contrary, if the system of interest has ever been
in thermal contact with another system, it will be described by a probability
distribution over many eigenstates that is equivalent to the canonical ensemble
for sufficiently large systems. Novotny et al. have recently supported this
picture by dynamical numerical calculations for a quantum mechanical model, in
which they showed the approach to a canonical distribution for up to 40 quantum
spins. By simplifying the problem to calculate only the equilibrium properties,
we are able to extend the demonstration to more than a million particles.


title:
Instrumental performance and results from testing of the BLAST-TNG
  receiver, submillimeter optics, and MKID arrays

abstract:
  Polarized thermal emission from interstellar dust grains can be used to map
magnetic fields in star forming molecular clouds and the diffuse interstellar
medium (ISM). The Balloon-borne Large Aperture Submillimeter Telescope for
Polarimetry (BLASTPol) flew from Antarctica in 2010 and 2012 and produced
degree-scale polarization maps of several nearby molecular clouds with
arcminute resolution. The success of BLASTPol has motivated a next-generation
instrument, BLAST-TNG, which will use more than 3000 linear polarization
sensitive microwave kinetic inductance detectors (MKIDs) combined with a 2.5m
diameter carbon fiber primary mirror to make diffraction-limited observations
at 250, 350, and 500 $\mu$m. With 16 times the mapping speed of BLASTPol,
sub-arcminute resolution, and a longer flight time, BLAST-TNG will be able to
examine nearby molecular clouds and the diffuse galactic dust polarization
spectrum in unprecedented detail. The 250 $\mu$m detector array has been
integrated into the new cryogenic receiver, and is undergoing testing to
establish the optical and polarization characteristics of the instrument.
BLAST-TNG will demonstrate the effectiveness of kilo-pixel MKID arrays for
applications in submillimeter astronomy. BLAST-TNG is scheduled to fly from
Antarctica in December 2017 for 28 days and will be the first balloon-borne
telescope to offer a quarter of the flight for "shared risk" observing by the
community.


title: Who did What: A Large-Scale Person-Centered Cloze Dataset

abstract:
  We have constructed a new "Who-did-What" dataset of over 200,000
fill-in-the-gap (cloze) multiple choice reading comprehension problems
constructed from the LDC English Gigaword newswire corpus. The WDW dataset has
a variety of novel features. First, in contrast with the CNN and Daily Mail
datasets (Hermann et al., 2015) we avoid using article summaries for question
formation. Instead, each problem is formed from two independent articles --- an
article given as the passage to be read and a separate article on the same
events used to form the question. Second, we avoid anonymization --- each
choice is a person named entity. Third, the problems have been filtered to
remove a fraction that are easily solved by simple baselines, while remaining
84% solvable by humans. We report performance benchmarks of standard systems
and propose the WDW dataset as a challenge task for the community.


title: Multiplicative dependence of the translations of algebraic numbers

abstract:
  In this paper, we first prove that given pairwise distinct algebraic numbers
$\alpha_1, \ldots, \alpha_n$, the numbers $\alpha_1+t, \ldots, \alpha_n+t$ are
multiplicatively independent for all sufficiently large integers $t$. Then, for
a pair $(a,b)$ of distinct integers, we study how many pairs $(a+t,b+t)$ are
multiplicatively dependent when $t$ runs through the integers. For such a pair
$(a,b)$ with $b-a=30$ we show that there are $13$ integers $t$ for which the
pair $(a+t,b+t)$ is multiplicatively dependent. We conjecture that $13$ is the
largest value of such translations for any $(a,b)$, where $a \ne b$, prove this
for all pairs $(a,b)$ with difference at most $10^{10}$, and, assuming that the
$ABC$ conjecture is true, show that for any such pair $(a,b)$, $a \ne b$, there
is an absolute bound $C_1$ (independent of $a$ and $b$) on the number of such
translations $t$.


title: Quantum Chromodynamics: Computational Aspects

abstract:
  We present a brief introduction to QCD, the QCD phase diagram, and
non-equilibrium phenomena in QCD. We emphasize aspects of the theory that can
be addressed using computational methods, in particular euclidean path integral
Monte Carlo, fluid dynamics, kinetic theory, classical field theory and
holographic duality.


title:
Asymptotic confidence bands for copulas based on the transformation
  kernel estimator

abstract:
  In this paper we establish asymptotic simultaneous confidence bands for the
transformation kernel estimator of copulas introduced in Omelka et al.(2009).
To this aim, we prove a uniform in bandwidth law of the iterated logarithm for
the maximal deviation of this estimator from its expectation, under smoothness
conditions on the copula function. We also study the bias, which tends
asymptotically and uniformly to zero with the same precise rate. Some
simulation experiments are finally provided to support our results


title:
We Can "See" You via Wi-Fi - WiFi Action Recognition via Vision-based
  Methods

abstract:
  Recently, Wi-Fi has caught tremendous attention for its ubiquity, and,
motivated by Wi-Fi's low cost and privacy preservation, researchers have been
putting lots of investigation into its potential on action recognition and even
person identification. In this paper, we offer an comprehensive overview on
these two topics in Wi-Fi. Also, through looking at these two topics from an
unprecedented perspective, we could achieve generality instead of designing
specific ad-hoc features for each scenario. Observing the great resemblance of
Channel State Information (CSI, a fine-grained information captured from the
received Wi-Fi signal) to texture, we proposed a brand-new framework based on
computer vision methods. To minimize the effect of location dependency embedded
in CSI, we propose a novel de-noising method based on Singular Value
Decomposition (SVD) to eliminate the background energy and effectively extract
the channel information of signals reflected by human bodies. From the
experiments conducted, we demonstrate the feasibility and efficacy of the
proposed methods. Also, we conclude factors that would affect the performance
and highlight a few promising issues that require further deliberation.


title: Shifted Convolution $L$-Series Values for Elliptic Curves

abstract:
  Using explicit constructions of the Weierstrass mock modular form, we offer a
closed formula for generating the values of shifted convolution $L$-values for
certain elliptic curves that can be computed to arbitrary precision. These
identities provide a surprising relation between weight $2$ newforms and
shifted convolution $L$-values.


title: Heat flow of Yang-Mills-Higgs functionals in dimension two

abstract:
  We consider the heat flow of Yang-Mills-Higgs functional where the base
manifold is a Riemannian surface and the fiber is a compact symplectic
manifold. We show that the corresponding Cauchy problem admits a global weak
solution for any $H^1$-initial data. Moreover, the solution is smooth except
finitely many singularities. We prove an energy identity at finite time
singularities and give a description of the asymptotic behavior at time
infinity.


title:
Enhancing the thermoelectric performance of a HfS2 monolayer through
  valley engineering

abstract:
  The electronic, phonon, and thermoelectric properties of a two-dimensional
HfS2 monolayer are investigated by using the first-principles calculations
combined with the Boltzmann transport theory. The band valleys of the HfS2
monolayer can be effectively tuned by the applied biaxial strain. The Seebeck
coefficient and therefore the peak value of the power factor (with the
relaxation time inserted) increase when the degeneracy of the band valleys is
increased by the strain. When no strain is applied, the HfS2 monolayer is an
excellent n-type thermoelectric material, while the thermoelectric performance
of the p-type doped one is poor. The applied tensile strain of 6% can increase
the room-temperature ZT value of the p-type doped system to 3.67, which is five
times larger than that of the unstrained one. The much more balanced ZT values
of the p- and n-type doping are favorable for fabrication of both p- and n-legs
of thermoelectric modules. Our results indicate that the thermoelectric
performance of the HfS2 monolayer can be greatly improved by the valley
engineering through the method of strain.


title: Regularization for supervised learning via the "hubNet" procedure

abstract:
  We propose a new method for supervised learning. The hubNet procedure fits a
hub-based graphical model to the predictors, to estimate the amount of
"connection" that each predictor has with other predictors. This yields a set
of predictor weights that are then used in a regularized regression such as the
lasso or elastic net. The resulting procedure is easy to implement, can
sometimes yields higher prediction accuracy that the lasso, and can give
insights into the underlying structure of the predictors. HubNet can also be
generalized seamlessly to other supervised problems such as regularized
logistic regression (and other GLMs), Cox's proportional hazards model, and
nonlinear procedures such as random forests and boosting. We prove some
recovery results under a specialized model and illustrate the method on real
and simulated data.


title: Higher Order Hochschild (Co)homology of Noncommutative Algebras

abstract:
  Hochschild (co)homology and Pirashvili's higher order Hochschild (co)homology
are useful tools for a variety of applications including deformations of
algebras. When working with higher order Hochschild (co)homology, we can
consider the (co)homology of any commutative algebra with symmetric coefficient
bimodules, however traditional Hochschild (co)homology is able to be computed
for any associative algebra with not necessarily symmetric coefficient
bimodules. In a previous paper, the author generalized higher order Hochschild
cohomology for multimodule coefficients (which need not be symmetric). In the
current paper, we continue to generalize higher order Hochschild (co)homology
to work with associative algebras which need not be commutative and in
particular, show that simplicial sets admit such a generalization if and only
if they are one dimensional.


title:
Channel Estimation and Uplink Achievable Rates in One-Bit Massive MIMO
  Systems

abstract:
  This paper considers channel estimation and achievable rates for the uplink
of a massive multiple-input multiple-output (MIMO) system where the base
station is equipped with one-bit analog-to-digital converters (ADCs). By
rewriting the nonlinear one-bit quantization using a linear expression, we
first derive a simple and insightful expression for the linear minimum
mean-square-error (LMMSE) channel estimator. Then employing this channel
estimator, we derive a closed-form expression for the lower bound of the
achievable rate for the maximum ratio combiner (MRC) receiver. Numerical
results are presented to verify our analysis and show that our proposed LMMSE
channel estimator outperforms the near maximum likelihood (nML) estimator
proposed previously.


title: How Much Training is Needed in One-Bit Massive MIMO Systems at Low SNR?

abstract:
  This paper considers training-based transmissions in massive multi-input
multi-output (MIMO) systems with one-bit analog-to-digital converters (ADCs).
We assume that each coherent transmission block consists of a pilot training
stage and a data transmission stage. The base station (BS) first employs the
linear minimum mean-square-error (LMMSE) method to estimate the channel and
then uses the maximum-ratio combining (MRC) receiver to detect the data
symbols. We first obtain an approximate closed-form expression for the uplink
achievable rate in the low SNR region. Then based on the result, we investigate
the optimal training length that maximizes the sum spectral efficiency for two
cases: i) The training power and the data transmission power are both
optimized; ii) The training power and the data transmission power are equal.
Numerical results show that, in contrast to conventional massive MIMO systems,
the optimal training length in one-bit massive MIMO systems is greater than the
number of users and depends on various parameters such as the coherence
interval and the average transmit power. Also, unlike conventional systems, it
is observed that in terms of sum spectral efficiency, there is relatively
little benefit to separately optimizing the training and data power.


title: Topology and geometry of the dark matter web: a multistream view

abstract:
  Topological connections in the single-streaming voids and multistreaming
filaments and walls reveal a cosmic web structure different from traditional
mass density fields. A single void structure not only percolates the
multistream field in all the directions, but also occupies over 99 per cent of
all the single-streaming regions. Sub-grid analyses on scales smaller than
simulation resolution reveal tiny pockets of voids that are isolated by
membranes of the structure. For the multistreaming excursion sets, the
percolating structure is significantly thinner than the filaments in
over-density excursion approach.
  Hessian eigenvalues of the multistream field are used as local geometrical
indicators of dark matter structures. Single-streaming regions have most of the
zero eigenvalues. Parameter-free conditions on the eigenvalues in the
multistream region may be used to delineate primitive geometries with
concavities corresponding to filaments, walls and haloes.


title: Dual User Selection for Security Enhancement in Uplink Multiuser Systems

abstract:
  This letter proposes a novel dual user selection scheme for uplink
transmission with multiple users, where a jamming user and a served user are
jointly selected to improve the secrecy performance. Specifically, the jamming
user transmits jamming signal with a certain rate, so that the base station
(BS) can decode the jamming signal before detecting the secret information
signal. By carefully selecting the jamming user and the served user, it makes
the eavesdropper decode the jamming signal with a low probability meanwhile the
BS can achieve a high receive signal-to-noise ratio (SNR). Therefore, the
uplink transmission achieves the dual secrecy improvement by jamming and
scheduling. It is shown that the proposed scheme can significantly improve the
security of the uplink transmission.


title:
Depolarization dynamics in a strongly interacting solid-state spin
  ensemble

abstract:
  We study the depolarization dynamics of a dense ensemble of dipolar
interacting spins, associated with nitrogen-vacancy centers in diamond. We
observe anomalously fast, density-dependent, and non-exponential spin
relaxation. To explain these observations, we propose a microscopic model where
an interplay of long-range interactions, disorder, and dissipation leads to
predictions that are in quantitative agreement with both current and prior
experimental results. Our results pave the way for controlled many-body
experiments with long-lived and strongly interacting ensembles of solid-state
spins.

categories: quant-ph cond-mat.dis-nn cond-mat.mes-hall cond-mat.stat-mech cond-mat.str-el


title: Computer simulations of the interface zone structure in binary eutectic

abstract:
  Molecular dynamics simulations of the interface structure in binary AgCu
eutectic were performed by using the realistic EAM potential. In simulations,
we examined such quantities as the time dependence of the total energy in the
process of equilibration, the probability distributions, the composition
profiles for the components, and the component diffusivities within the
interface zone. It is shown that the equilibrium in the solid state associated
with the complete phase separation in binary eutectic is accompanied by
formation of the steady disordered diffusion zone at the boundary of the
crystalline components. At higher temperatures, closer to the eutectic point,
the increase in the width of the steady diffusion zone is observed. The
particle diffusivities grow therewith to the numbers typical for the liquid
phase. Above the eutectic point, the steady zone does not form, instead, the
complete contact melting in the system occurs. The results of simulations
indicate that during the temperature increase the phenomenon of contact melting
is preceded by the similar process spatially localized in the vicinity of the
interface.


title:
Secure Communication in Uplink Transmissions: User Selection and
  Multiuser Secrecy Gain

abstract:
  In this paper, we investigate secure communications in uplink transmissions,
where there are a base station (BS) with M receive antennas, K mobile users
each with a single antenna, and an eavesdropper with N receive antennas. The
closed-form expressions of the achievable ergodic secrecy sumrates (ESSR) for a
random k users selection scheme in the high and low SNR regimes are presented.
It is shown that the scaling behavior of ESSR with respect to the number of
served users k can be quite different under different system configurations,
determined by the numbers of the BS antennas and that of the eavesdropper
antennas. In order to achieve a multiuser gain, two low-complexity user
selection schemes are proposed under different assumptions on the
eavesdropper's channel state information (CSI). The closed-form expressions of
the achievable ESSRs and the multiuser secrecy gains of the two schemes are
also presented in both low and high SNR regimes. We observe that, as k
increases, the multiuser secrecy gain increases, while the ESSR may decrease.
Therefore, when N is much larger than M, serving one user with the strongest
channel (TDMA-like) is a favourable secrecy scheme, where the ESSR scales with
root square of 2 log K.


title:
Optical observation of spin-density-wave fluctuations in Ba122
  iron-based superconductors

abstract:
  In iron-based superconductors, a spin-density-wave (SDW) magnetic order is
suppressed with doping and unconventional superconductivity appears in close
proximity to the SDW instability. The optical response of the SDW order shows
clear gap features: substantial suppression in the low-frequency optical
conductivity, alongside a spectral weight transfer from low to high
frequencies. Here, we study the detailed temperature dependence of the optical
response in three different series of the Ba122 system
[Ba$_{1-x}$K$_{x}$Fe$_{2}$As$_{2}$, Ba(Fe$_{1-x}$Co$_{x}$)$_{2}$As$_{2}$ and
BaFe$_{2}$(As$_{1-x}$P$_{x}$)$_{2}$]. Intriguingly, we found that the
suppression of the low-frequency optical conductivity and spectral weight
transfer appear at a temperature $T^{\ast}$ much higher than the SDW transition
temperature $T_{SDW}$. Since this behavior has the same optical feature and
energy scale as the SDW order, we attribute it to SDW fluctuations.
Furthermore, $T^{\ast}$ is suppressed with doping, closely following the doping
dependence of the nematic fluctuations detected by other techniques. These
results suggest that the magnetic and nematic orders have an intimate
relationship, in favor of the magnetic-fluctuation-driven nematicity scenario
in iron-based superconductors.


title: The hidden charm pentaquarks are the hidden color-octet $uud$ baryons?

abstract:
  The $I(J^P)={1\over 2}({1\over 2}^-)$, ${1\over 2}({3\over 2}^-)$, and
${1\over 2}({5\over 2}^-)$ $uudc\overline{c}$ pentaquarks are investigated by
the quark cluster model. This model, which reproduces the mass spectra of the
color-singlet $S$-wave $q^3$ baryons and $q\overline{q}$ mesons, also enables
us to evaluate the quark interaction in the color-octet $uud$ configurations.
It is shown that the color-octet isospin-${1\over 2}$ spin-${3\over 2}$ $uud$
configuration gains attraction. The $uudc\overline{c}$ states with this
configuration have structures around the $\Sigma_c{}^{(*)}\overline{D}{}^{(*)}$
thresholds: one bound state, two resonances, and one large cusp are found. We
argue that the negative parity pentaquark found by the LHCb experiments may be
given by these structures.


title:
A non-invasive method for nanoscale electrostatic gating of pristine
  materials

abstract:
  Electrostatic gating is essential for defining and control of semiconducting
devices. However, nano-fabrication processes required for depositing gates
inevitably degrade the pristine quality of the material of interest. Examples
of materials that suffer from such degradation include ultra-high mobility
GaAs/AlGaAs two-dimensional electron gases (2DEGs), graphene, topological
insulators, and nanowires. To preserve the pristine material properties, we
have developed a flip-chip setup where gates are separated from the material by
a vacuum, which allows nanoscale electrostatic gating of the material without
exposing it to invasive nano-processing. An additional benefit is the vacuum
between gates and material, which, unlike gate dielectrics, is free from charge
traps. We demonstrate the operation and feasibility of the flip-chip setup by
achieving quantum interference at integer quantum Hall states in a
Fabry-P\'erot interferometer based on a GaAs/AlGaAs 2DEG. Our results pave the
way for the study of exotic phenomena including fragile fractional quantum Hall
states by preserving the high quality of the material.


title: A Recurrent Encoder-Decoder Network for Sequential Face Alignment

abstract:
  We propose a novel recurrent encoder-decoder network model for real-time
video-based face alignment. Our proposed model predicts 2D facial point maps
regularized by a regression loss, while uniquely exploiting recurrent learning
at both spatial and temporal dimensions. At the spatial level, we add a
feedback loop connection between the combined output response map and the
input, in order to enable iterative coarse-to-fine face alignment using a
single network model. At the temporal level, we first decouple the features in
the bottleneck of the network into temporal-variant factors, such as pose and
expression, and temporal-invariant factors, such as identity information.
Temporal recurrent learning is then applied to the decoupled temporal-variant
features, yielding better generalization and significantly more accurate
results at test time. We perform a comprehensive experimental analysis, showing
the importance of each component of our proposed model, as well as superior
results over the state-of-the-art in standard datasets.


title:
Quantized conductance and large g-factor anisotropy in InSb quantum
  point contacts

abstract:
  Due to a strong spin-orbit interaction and a large Land\'e g-factor, InSb
plays an important role in research on Majorana fermions. To further explore
novel properties of Majorana fermions, hybrid devices based on quantum wells
are conceived as an alternative approach to nanowires. In this work, we report
a pronounced conductance quantization of quantum point contact devices in
InSb/InAlSb quantum wells. Using a rotating magnetic field, we observe a large
in-plane (|g1|=26) and out-of-plane (|g1|=52) g-factor anisotropy.
Additionally, we investigate crossings of subbands with opposite spins and
extract the electron effective mass from magnetic depopulation of
one-dimensional subbands.


title:
Efficient Computation of Slepian Functions for Arbitrary Regions on the
  Sphere

abstract:
  In this paper, we develop a new method for the fast and memory-efficient
computation of Slepian functions on the sphere. Slepian functions, which arise
as the solution of the Slepian concentration problem on the sphere, have
desirable properties for applications where measurements are only available
within a spatially limited region on the sphere and/or a function is required
to be analyzed over the spatially limited region. Slepian functions are
currently not easily computed for large band-limits for an arbitrary spatial
region due to high computational and large memory storage requirements. For the
special case of a polar cap, the symmetry of the region enables the
decomposition of the Slepian concentration problem into smaller subproblems and
consequently the efficient computation of Slepian functions for large
band-limits. By exploiting the efficient computation of Slepian functions for
the polar cap region on the sphere, we develop a formulation, supported by a
fast algorithm, for the approximate computation of Slepian functions for an
arbitrary spatial region to enable the analysis of modern datasets that support
large band-limits. For the proposed algorithm, we carry out accuracy analysis
of the approximation, computational complexity analysis, and review of memory
storage requirements. We illustrate, through numerical experiments, that the
proposed method enables faster computation, and has smaller storage
requirements, while allowing for sufficiently accurate computation of the
Slepian functions.


title:
Absolute instabilities of travelling wave solutions in a Keller-Segel
  model

abstract:
  We investigate the spectral stability of travelling wave solutions in a
Keller-Segel model of bacterial chemotaxis with a logarithmic chemosensitivity
function and a constant, sublinear, and linear consumption rate. Linearising
around the travelling wave solutions, we locate the essential and absolute
spectrum of the associated linear operators and find that all travelling wave
solutions have essential spectrum in the right half plane. However, we show
that in the case of constant or sublinear consumption there exists a range of
parameters such that the absolute spectrum is contained in the open left half
plane and the essential spectrum can thus be weighted into the open left half
plane. For the constant and sublinear consumption rate models we also determine
critical parameter values for which the absolute spectrum crosses into the
right half plane, indicating the onset of an absolute instability of the
travelling wave solution. We observe that this crossing always occurs off of
the real axis.


title: Faster Functional Clustering via Gaussian Mixture Models

abstract:
  Functional data analysis (FDA) is an important modern paradigm for handling
infinite-dimensional data. An important task in FDA is model-based clustering,
which organizes functional populations into groups via subpopulation
structures. The most common approach for model-based clustering of functional
data is via mixtures of linear mixed-effects models. The mixture of linear
mixed-effects models (MLMM) approach requires a computationally intensive
algorithm for estimation. We provide a novel Gaussian mixture model (GMM)
characterization of the model-based clustering problem. We demonstrate that
this GMM-based characterization allows for improved computational speeds over
the MLMM approach when applied via available functions in the R programming
environment. Theoretical considerations for the GMM approach are discussed. An
example application to a dataset based upon calcium imaging in the larval
zebrafish brain is provided as a demonstration of the effectiveness of the
simpler GMM approach.


title:
Solving the 56Ni puzzle of magnetar-powered broad-lined type Ic
  supernovae

abstract:
  Broad-lined type Ic supernovae (SNe Ic-BL) are of great importance because
their association with long-duration gamma-ray bursts (LGRBs) holds the key to
deciphering the central engine of LGRBs, which refrains from being unveiled
despite decades of investigation. Among the two popularly hypothesized types of
central engine, i.e., black holes and strongly magnetized neutron stars
(magnetars), there is mounting evidence that the central engine of
GRB-associated SNe (GRB-SNe) is rapidly rotating magnetars. Theoretical
analysis also suggests that magnetars could be the central engine of SNe Ic-BL.
What puzzled the researchers is the fact that light curve modeling indicates
that as much as 0.2-0.5 solar mass of 56Ni was synthesized during the explosion
of the SNe Ic-BL, which is unfortunately in direct conflict with current
state-of-the-art understanding of magnetar-powered 56Ni synthesis. Here we
propose a dynamic model of magnetar-powered SNe to take into account the
acceleration of the ejecta by the magnetar, as well as the thermalization of
the injected energy. Assuming that the SN kinetic energy comes exclusively from
the magnetar acceleration, we find that although a major fraction of the
rotational energy of the magnetar is to accelerate the SNe ejecta, a tiny
fraction of this energy deposited as thermal energy of the ejecta is enough to
reduce the needed 56Ni to 0.06 solar mass for both SN 1997ef and SN 2007ru. We
therefore suggest that magnetars could power SNe Ic-BL both in aspects of
energetics and of 56Ni synthesis.


title:
Shape evolutions of $^{72,74}$Kr with temperature in the covariant
  density functional theory

abstract:
  The rich phenomena of deformations in neutron-deficient krypton isotopes such
as the shape evolution with neutron number and the shape coexistence attract
the interests of nuclear physicists for decades. It will be interesting to
study such shape phenomena using a novel way, i.e., by thermally exciting the
nucleus. So in this work, we develop the finite temperature covariant density
functional theory for axially deformed nuclei with the treatment of pairing
correlations by BCS approach, and apply this approach for the study of shape
evolutions in $^{72,74}$Kr with increasing temperatures. For $^{72}$Kr, with
temperature increasing, the nucleus firstly experiences a relatively quick
weakening in oblate deformation at temperature $T \sim0.9$ MeV, and then
changes from oblate to spherical at $T \sim2.1$ MeV. For $^{74}$Kr, its global
minimum locates at quadroupole deformation $\beta_2 \sim -0.14$ and abruptly
changes to spherical at $T\sim 1.7$ MeV. The proton pairing transition occurs
at critical temperature 0.6 MeV following the rule $T_c =0.6 \Delta_p (0)$
where $\Delta_p(0)$ is the proton pairing gap at zero temperature. The
signatures of the above pairing transition and shape changes can be found in
the curve of the specific heat. The single-particle level evolutions with the
temperature are presented.


title:
Hidden $sl(2)$-algebraic structure in Rabi model and its 2-photon and
  two-mode generalizations

abstract:
  It is shown that the (driven) quantum Rabi model and its 2-photon and 2-mode
generalizations possess a hidden $sl(2)$-algebraic structure which explains the
origin of the quasi-exact solvability of these models. It manifests the first
appearance of a hidden algebraic structure in quantum spin-boson systems
without $U(1)$ symmetry.


title:
A heuristic scheme for the Cooperative Team Orienteering Problem with
  Time Windows

abstract:
  The Cooperative Orienteering Problem with Time Windows (COPTW)is a class of
problems with some important applications and yet has received relatively
little attention. In the COPTW a certain number of team members are required to
collect the associated reward from each customer simultaneously and
cooperatively. This requirement to have one or more team members simultaneously
available at a vertex to collect the reward, poses a challenging OR task. Exact
methods are not able to handle large scale instances of the COPTW and no
heuristic schemes have been developed for this problem so far. In this paper, a
new modification to the classical Clarke and Wright saving heuristic is
proposed to handle this problem. A new benchmark set generated by adding the
resource requirement attribute to the existing benchmarks. The heuristic
algorithm followed by boosting operators achieves optimal solutions for 64.5%
of instances for which the optimal results are known. The proposed solution
approach attains an optimality gap of 2.61% for the same instances and solves
benchmarks with realistic size within short computational times.


title:
Defect-free nanocrystals are at thermodynamic equilibrium at room
  temperature

abstract:
  Crystal defect statistics is developed by minimizing the Gibbs free energy of
defect formation, which is commonly converted to a crystallite size-independent
equation by applying Stirling's approximation. Solutions of this equation
forecast Arrhenius-like temperature dependence for the concentrations of all
defect types, and higher defect populations for nanocrystals due to the smaller
formation free energies involved. Here, we improve the accuracy in the
mathematical processing of the equation describing the defect population at
thermodynamic equilibrium and show that this equation is intrinsically
size-dependent. The new model predicts lower defect concentrations for smaller
crystallites, and shows that vacancy-free crystallites smaller than a
determinable critical size are thermodynamically stable at elevated
temperatures. Our findings describe the previously reported data on the
mechanical properties of a number of nanocrystals and lead to a revised and
deeper understanding of many morphological occurrences in micro- and
nanocrystals.


title:
The Redshifted Hydrogen Balmer and Metastable He I Absorption Line
  System in Mini-FeLoBAL Quasar SDSS J112526.12+002901.3: A Parsec Scale
  Accretion Inflow?

abstract:
  The accretion of interstellar medium onto the central super massive black
holes is widely accepted as the source of the gigantic energy released by the
active galactic nuclei. But few pieces of observational evidence have been
confirmed directly demonstrating the existence of the inflows. The absorption
line system in the spectra of quasar SDSS J112526.12+002901.3 presents an
interesting example, in which the rarely detected hydrogen Balmer and
metastable He I absorption lines are found redshifted to the quasar's rest
frame along with the low-ionization metal absorption lines Mg II, Fe II, etc.
The repeated SDSS spectroscopic observations suggest a transverse velocity
smaller than the radial velocity. The motion of the absorbing medium is thus
dominated by infall. The He I* lines present a powerful probe to the strength
of ionizing flux, while the Balmer lines imply a dense environment. With the
help of photoionization simulations, we find the absorbing medium is exposed to
the radiation with ionization parameter $U\approx 10^{-1.8}$, and the density
is $n(\mathrm{H})\approx 10^9\ \mathrm{cm}^{-3}$. Thus the absorbing medium is
located $\sim 4\ \mathrm{pc}$ away from the central engine. According to the
similarity in the distance and physical conditions between the absorbing medium
and the torus, we strongly propose the absorption line system as a candidate
for the accretion inflow which originates from the inner surface of the torus.


title: On-chip all-dielectric fabrication-tolerant zero-index metamaterials

abstract:
  Zero-index metamaterials (ZIMs) offer unprecedented ways to manipulate the
flow of light, and are of interest for wide range of applications including
optical cloaking, super-coupling, and unconventional phase-matching properties
in nonlinear optics. Impedance-matched ZIMs can be obtained through a photonic
Dirac-cone (PDC) dispersion induced by an accidental degeneracy of two linear
bands - typically an electric monopole mode and a transverse magnetic dipole
mode - at the center of the Brillouin zone. Consequently, PDC can only be
achieved for a particular combination of geometric parameters of the
metamaterial, and hence is sensitive to fabrication imperfections. These
fabrication imperfections may limit the usefulness in practical applications.
In this work we overcome this obstacle and demonstrate robust all-dielectric
(AD) ZIM that supports PDC dispersion over wide parameter space. Our structure,
consisting of an array of Si pillars on silica substrate, is fabricated in
silicon-oninsulator (SOI) platform and operates at telecom wavelengths.


title: Unbounded Norm Topology in Banach Lattices

abstract:
  A net $(x_\alpha)$ in a Banach lattice $X$ is said to un-converge to a vector
$x$ if $\bigl\lVert\lvert x_\alpha-x\rvert\wedge u\bigr\rVert\to 0$ for every
$u\in X_+$. In this paper, we investigate un-topology, i.e., the topology that
corresponds to un-convergence. We show that un-topology agrees with the norm
topology iff $X$ has a strong unit. Un-topology is metrizable iff $X$ has a
quasi-interior point. Suppose that $X$ is order continuous, then un-topology is
locally convex iff $X$ is atomic. An order continuous Banach lattice $X$ is a
KB-space iff its closed unit ball $B_X$ is un-complete. For a Banach lattice
$X$, $B_X$ is un-compact iff $X$ is an atomic KB-space. We also study
un-compact operators and the relationship between un-convergence and
weak*-convergence.


title: Positivity of line bundles on special blow ups of $\mathbb{P}^2$

abstract:
  Let $C \subset \mathbb{P}^2$ be an irreducible and reduced curve of degree $e
> 0$. Let $X$ be the blow up of $\mathbb{P}^2$ at $r$ distinct smooth points
$p_1,\ldots,p_r \in C$. We study line bundles on $X$ and establish conditions
for ampleness and $k$-very ampleness.


title: Point mass Cosmological Black Holes

abstract:
  Real black holes in the universe are located in the expanding accelerating
background which are called the cosmological black holes. Hence, it is
necessary to model these black holes in the cosmological background where the
dark energy is the dominant energy. In this paper, we argue that most of the
dynamical cosmological black holes can be modeled by point mass cosmological
black holes. Considering the de Sitter background for the accelerating
universe, we present the point mass cosmological background in the cosmological
de Sitter space time. Our work also includes the point mass black holes which
have charge and angular momentum. We study the mass, horizons, redshift
structure and geodesics properties for these black holes.


title: Nonequilibrium phase transitions in isotropic Ashkin-Teller Model

abstract:
  Dynamic behaviour of an isotropic Ashkin-Teller model in the presence of a
periodically oscillating magnetic field has been analysed by means of the mean
field approximation. The dynamic equation of motion has been constructed with
the help of a Glauber type stochastic process and solved for a square lattice.
  After defining the possible dynamical phases of the system, phase diagrams
have been given and the behaviour of the hysteresis loops has been investigated
in detail. The hysteresis loop for specific order parameter of isotropic
Ashkin-Teller model has been defined and characteristics of this loop in
different dynamical phases have been given.


title:
Network Volume Anomaly Detection and Identification in Large-scale
  Networks based on Online Time-structured Traffic Tensor Tracking

abstract:
  This paper addresses network anomography, that is, the problem of inferring
network-level anomalies from indirect link measurements. This problem is cast
as a low-rank subspace tracking problem for normal flows under incomplete
observations, and an outlier detection problem for abnormal flows. Since
traffic data is large-scale time-structured data accompanied with noise and
outliers under partial observations, an efficient modeling method is essential.
To this end, this paper proposes an online subspace tracking of a Hankelized
time-structured traffic tensor for normal flows based on the Candecomp/PARAFAC
decomposition exploiting the recursive least squares (RLS) algorithm. We
estimate abnormal flows as outlier sparse flows via sparsity maximization in
the underlying under-constrained linear-inverse problem. A major advantage is
that our algorithm estimates normal flows by low-dimensional matrices with
time-directional features as well as the spatial correlation of multiple links
without using the past observed measurements and the past model parameters.
Extensive numerical evaluations show that the proposed algorithm achieves
faster convergence per iteration of model approximation, and better volume
anomaly detection performance compared to state-of-the-art algorithms.


title: Associative memory by collective regulation of non-coding RNA

abstract:
  The majority of mammalian genomic transcripts do not directly code for
proteins and it is currently believed that most of these are not under
evolutionary constraint. However given the abundance non-coding RNA (ncRNA) and
its strong affinity for inter-RNA binding, these molecules have the potential
to regulate proteins in a highly distributed way, similar to artificial neural
networks. We explore this analogy by devising a simple architecture for a
biochemical network that can function as an associative memory. We show that
the steady state solution for this chemical network has the same structure as
an associative memory neural network model. By allowing the choice of
equilibrium constants between different ncRNA species, the concentration of
unbound ncRNA can be made to follow any pattern and many patterns can be stored
simultaneously. The model is studied numerically and within certain parameter
regimes it functions as predicted. Even if the starting concentration pattern
is quite different, it is shown to converge to the original pattern most of the
time. The network is also robust to mutations in equilibrium constants. This
calls into question the criteria for deciding if a sequence is under
evolutionary constraint.


title: The fractional strong metric dimension in three graph products

abstract:
  For any two distinct vertices $x$ and $y$ of a graph $G$, let $S\{x, y\}$
denote the set of vertices $z$ such that either $x$ lies on a $y-z$ geodesic or
$y$ lies on an $x-z$ geodesic. Let $g: V(G) \rightarrow [0,1]$ be a real valued
function and, for any $U \subseteq V(G)$, let $g(U)=\sum_{v \in U}g(v)$. The
function $g$ is a strong resolving function of $G$ if $g(S\{x, y\}) \ge 1$ for
every pair of distinct vertices $x, y$ of $G$. The fractional strong metric
dimension, $sdim_f(G)$, of a graph $G$ is $\min\{g(V(G)): g \mbox{ is a strong
resolving function of }G\}$. In this paper, after obtaining some new results
for all connected graphs, we focus on the study of the fractional strong metric
dimension of the corona product, the lexicographic product, and the Cartesian
product of graphs.


title:
Gauge Symmetry Breaking Patterns in an SU(5) Grand Gauge-Higgs
  Unification

abstract:
  We study gauge symmetry breaking patterns of the five-dimensional $SU(5)$
grand gauge-Higgs unification compactified on an orbifold $S^1/{\mathbb Z}_2$
with the Hosotani mechanism in the framework of the diagonal embedding method.
We find matter contents that lead to the $SU(3)\times SU(2)\times U(1)$ gauge
symmetry on the global minimum of the effective potential and also present
examples of matter content for which each regular subgroup of $SU(5)$ is
realized as vacuum configuration. The finite temperature phase transitions for
the models with the gauge symmetry of the standard model at zero temperature
and also for supersymmetric models are studied. We show in a certain model with
supersymmetry that the vacuum of the standard model selected dynamically before
the inflation continues to stay there up to the present.


title:
A Novel a priori State Computation Strategy for the Unscented Kalman
  Filter to Improve Computational Efficiency

abstract:
  A priori state vector and error covariance computation for the Unscented
Kalman Filter (UKF) is described. The original UKF propagates multiple sigma
points to compute the a priori mean state vector and the error covariance,
resulting in a higher computational time compared to the Extended Kalman Filter
(EKF). In the proposed method, the posterior mean state vector is propagated
and then the sigma points at the current time step are calculated using the
first-order Taylor Series approximation. This reduces the computation time
significantly, as demonstrated using two example applications which show
improvements of 90.5% and 92.6%. This method shows the estimated state vector
and the error covariance are accurate to the first-order Taylor series terms. A
second method using Richardson Extrapolation improves prediction accuracy to
the second-order Taylor series terms. This is implemented on the two examples,
improving efficiency by 85.5% and 86.8%.


title: Elicitability and backtesting: Perspectives for banking regulation

abstract:
  Conditional forecasts of risk measures play an important role in internal
risk management of financial institutions as well as in regulatory capital
calculations. In order to assess forecasting performance of a risk measurement
procedure, risk measure forecasts are compared to the realized financial losses
over a period of time and a statistical test of correctness of the procedure is
conducted. This process is known as backtesting. Such traditional backtests are
concerned with assessing some optimality property of a set of risk measure
estimates. However, they are not suited to compare different risk estimation
procedures. We investigate the proposal of comparative backtests, which are
better suited for method comparisons on the basis of forecasting accuracy, but
necessitate an elicitable risk measure. We argue that supplementing traditional
backtests with comparative backtests will enhance the existing trading book
regulatory framework for banks by providing the correct incentive for accuracy
of risk measure forecasts. In addition, the comparative backtesting framework
could be used by banks internally as well as by researchers to guide selection
of forecasting methods. The discussion focuses on three risk measures,
Value-at-Risk, expected shortfall and expectiles, and is supported by a
simulation study and data analysis.


title: On space of integrable quantum field theories

abstract:
  We study deformations of 2D Integrable Quantum Field Theories (IQFT) which
preserve integrability (the existence of infinitely many local integrals of
motion). The IQFT are understood as "effective field theories", with finite
ultraviolet cutoff. We show that for any such IQFT there are infinitely many
integrable deformations generated by scalar local fields $X_s$, which are in
one-to-one correspondence with the local integrals of motion; moreover, the
scalars $X_s$ are built from the components of the associated conserved
currents in a universal way. The first of these scalars, $X_1$, coincides with
the composite field $(T{\bar T})$ built from the components of the
energy-momentum tensor. The deformations of quantum field theories generated by
$X_1$ are "solvable" in a certain sense, even if the original theory is not
integrable. In a massive IQFT the deformations $X_s$ are identified with the
deformations of the corresponding factorizable S-matrix via the CDD factor. The
situation is illustrated by explicit construction of the form factors of the
operators $X_s$ in sine-Gordon theory. We also make some remarks on the problem
of UV completeness of such integrable deformations.


title:
The bounded spherical functions on the Cartan Motion group and
  Generalizations for the eigenspaces of the Laplacian on Rn

abstract:
  The bounded spherical functions are determined for a real Cartan Motion group
which is a generalization for the case when the Cartan Motion group is complex
written by Helgason Sigurdur . Also, I will do a further step of the Laplacian
on R n . I consider the case when K is transitive on the spheres about 0 in Rn
,n > 1


title:
Disambiguating the role of noise correlations when decoding neural
  populations together

abstract:
  One of the most controversial problems in neural decoding is quantifying the
information loss caused by ignoring noise correlations during optimal brain
computations. For more than a decade, the measure here called $ \Delta I^{DL} $
has been believed exact. However, we have recently shown that it can exceed the
information loss $ \Delta I^{B} $ caused by optimal decoders constructed
ignoring noise correlations. Unfortunately, the different information notions
underlying $ \Delta I^{DL} $ and $ \Delta I^{B} $, and the putative rigorous
information-theoretical derivation of $ \Delta I^{DL} $, both render unclear
whether those findings indicate either flaws in $ \Delta I^{DL} $ or major
departures from traditional relations between information and decoding. Here we
resolve this paradox and prove that, under certain conditions, observing $
\Delta I^{DL} {>}\Delta I^{B} $ implies that $ \Delta I^{DL} $ is flawed.
Motivated by this analysis, we test both measures using neural populations that
transmit independent information. Our results show that $ \Delta I^{DL} $ may
deem noise correlations more important when decoding the populations together
than when decoding them in parallel, whereas the opposite may occur for $
\Delta I^{B} $. We trace these phenomena back, for $ \Delta I^{B} $, to the
choice of tie-breaking rules, and for $ \Delta I^{DL} $, to unforeseen
limitations within its information-theoretical foundations. Our study
contributes with better estimates that potentially improve theoretical and
experimental inferences currently drawn from $ \Delta I^{DL} $ without noticing
that it may constitute an upper bound. On the practical side, our results
promote the design of optimal decoding algorithms and neuroprosthetics without
recording noise correlations, thereby saving experimental and computational
resources.


title:
$L^p$-maximal hypoelliptic regularity of nonlocal kinetic Fokker-Planck
  operators

abstract:
  For $p\in(1,\infty)$, let $u(t,x,v)$ and $f(t,x,v)$ be in $L^p(\mathbb{R}
\times \mathbb{R}^d \times \mathbb{R}^d)$ and satisfy the following nonlocal
kinetic Fokker-Plank equation on $\mathbb{R}^{1+2d}$ in the weak sense: $$
\partial_t u+v\cdot\nabla_x u=\Delta^{{\alpha}/{2}}_v u+f, $$ where
$\alpha\in(0,2)$ and $\Delta^{{\alpha}/{2}}_v$ is the usual fractional
Laplacian applied to $v$-variable. We show that there is a constant
$C=C(p,\alpha,d)>0$ such that for any $f(t, x, v)\in L^p(\mathbb{R} \times
\mathbb{R}^d \times \mathbb{R}^d)=L^p(\mathbb{R}^{1+2d})$, $$
\|\Delta_x^{{\alpha}/{(2(1+\alpha))}}u\|_p+\|\Delta_v^{{\alpha}/{2}}u\|_p\leq
C\|f\|_p, $$ where $\|\cdot\|_p$ is the usual $L^p$-norm in
$L^p(\mathbb{R}^{1+2d}; d z)$. In fact, in this paper the above inequality is
established for a large class of time-dependent non-local kinetic Fokker-Plank
equations on $\mathbb{R}^{1+2d}$, with $U_t v$ and
$\mathscr{L}^{\nu_t}_{\sigma_t}$ in place of $v\cdot \nabla_x$ and
$\Delta^{\alpha/2}_v$. See Theorem 3.3 for details.


title: Deuteron-nucleus total reaction cross sections up to 1 GeV

abstract:
  Total reaction cross sections of deuteron, $\sigma_d^{\rm R}$, are calculated
by a microscopic three-body reaction model. The reaction model has no free
adjustable parameter and applicable to reactions at various deuteron incident
energies $E_d$ and with both stable and unstable nuclei. The predicted
$\sigma_d^{\rm R}$ are consistent with those evaluated by a phenomenological
optical potential for $E_d\leq 200$ MeV in which the potential has been
parametrized. A simple formula of $\sigma_d^{\rm R}$ up to $E_d=1$ GeV, as a
function of $E_d$, the target mass number $A$ and its atomic number $Z$, is
given.


title: Time-resolved two-photon excitation of long-lifetime polaritons

abstract:
  Recent studies of two-photon excitation of exciton-polaritons in
microcavities have considered the possibility of an allowed absorption process
into the $2p$-state of the excitons which participate in the polariton effect.
Here we report time-resolved measurements of two-photon excitation directly
into the lower polariton states invoking the $1s$ state of the excitons.
Although this process is forbidden by symmetry for light at normal incidence,
it is allowed at non-zero angle of incidence due to state mixing.


title:
End of Publication? Open access and a new scholarly communication
  technology

abstract:
  At this time, developers of research information systems are experimenting
with new tools for research outputs usage that can expand the open access to
research. These tools allow researchers to record research as annotations,
nanopublications or other micro research outputs and link them by scientific
relationships. If these micro outputs and relationships are shared by their
creators publicly, these actions can initiate direct scholarly communication
between the creators and the authors of the used research outputs. Such direct
communication takes place while researchers are manipulating and organising
their research results, e.g. as manuscripts. Thus, researchers come to
communication before the manuscripts become traditional publications. In this
paper, we discuss how this pre-publication communication can affect existing
research practice. It can have important consequences for the research
community like the end of publication as a communication instrument, the higher
level of transparency in research, changes for the Open Access movement,
academic publishers, peer-reviewing and research assessment systems. We analyse
a background that exists in the economics discipline for experiments with the
pre-publication communication. We propose a set of experiments with already
existed and new tools, which can help with exploring the end of publication
possible impacts on the research community.


title:
Spectra for Gelfand pairs associated with the free two step nilpotent
  lie group

abstract:
  Let $F(n)$ be a connected and simply connected free 2-step nilpotent lie
group and $K$ be a compact subgroup of Aut($F(n)$). We say that $(K,F(n))$ is a
Gelfand pair when the set of integrable $K$-invariant functions on $F(n)$ forms
an abelian algebra under convolution. In this paper, we consider the case when
$K=O(n)$. In [1], we know the only possible Galfand pairs for $(K,F(n))$ is
$(O(n),F(n))$, $(SO(n),F(n))$. So we just consider the case $(O(n),F(n))$, the
other case can be obtained in the similar way.We study the natural topology on
$\Delta (O(n),F(n))$ given by uniform convergence on compact subsets in $F(n)$.
We show $\Delta (O(n),F(n))$ is a complete metric space. Our main result gives
a necessary and sufficient result for the sequence of the "type 1" bounded
$O(n)$-spherical functions uniform convergence to the "type 1" bounded
$O(n)$-spherical function on compact sets in $F(n)$. What's more, the "type 1"
bounded $O(n)$-spherical functions are dense in $\Delta (O(n),F(n))$. Further,
we define the Fourier transform according to the "type 2" bounded
$O(n)$-spherical functions and gives some basic properties of it.


title:
A new method to prove the irreducibility of the eigenspace
  representations for Rn semidirect with a finite pseudo-reflection group

abstract:
  We show that the Eigenspace Representations for $\mathbb{R}^{n}$ semidirect
with a finite pseudo-reflection group $K$, which satisfy some generic property
are equivalent to the induced representations from $\mathbb{R}^{n}$ to
$\mathbb{R}^{n} \rtimes K$, which satisfy the same property by Mackey little
group method.And the proof of the equivalence is by using matrix coefficients
and invariant theory.As a consequence, these eigenspace representations are
irreducible.


title:
The IACOB project: III. New observational clues to understand
  macroturbulent broadening in massive O- and B-type stars

abstract:
  We aim to provide new empirical clues about macroturbulent spectral line
broadening in O- and B-type stars to evaluate its physical origin.
  We use high-resolution spectra of ~430 stars with spectral types in the range
O4-B9 (all luminosity classes). We characterize the line-broadening of adequate
diagnostic metal lines using a combined FT and GOF technique. We perform a
quantitative spectroscopic analysis of the whole sample using automatic tools
coupled with a huge grid of FASTWIND models. We also incorporate quantitative
information about line asymmetries to our observational description of the
characteristics of the line-profiles, and present a comparison of the shape and
type of line-profile variability found in a small sample of O stars and B
supergiants with still undefined pulsational properties and B main sequence
stars with variable line-profiles.
  We present a homogeneous and statistically significant overview of the
(single snapshot) line-broadening properties of stars in the whole O and B star
domain. We find empirical evidence of the existence of various types of
non-rotational broadening agents acting in the realm of massive stars. Even
though all of them could be quoted and quantified as a macroturbulent
broadening from a practical point of view, their physical origin can be
different. Contrarily to the early- to late-B dwarfs/giants, which present a
mixture of cases in terms of line-profile shape and variability, the whole
O-type and B supergiant domain (or, roughly speaking, stars with M_ZAMS > 15
M_sol) is fully dominated by stars with a remarkable non-rotational broadening
component and very similar profiles (including type of variability). We provide
some examples illustrating how this observational dataset can be used to
evaluate scenarios aimed at explaining the existence of sources of
non-rotational broadening in massive stars.


title: The Distant Outer Gas Arm Between l=35d and l=45d

abstract:
  The Galactic plane has been mapped from l=34.75d to 45.25d and b=-5.25d to
5.25d in the CO (J=1-0) emission with the 13.7 m telescope of the Purple
Mountain Observatory. The unbiased survey covers a large area of 100 square
degrees sampled every 30" with a velocity resolution of ~0.2km/s. In this
paper, we present the result of an unbiased CO survey of this longitude and
latitude range in the velocity range from -60km/s to -10km/s. Over 500
molecular clouds (MCs) are picked out from the 12CO emission, and 131 of these
MCs are associated with 13CO emission.The distant MCs, which lie beyond the
solar circle and are mostly concentrated in the Galactic plane, trace the
large-scale molecular gas structure over 10 degrees of Galactic azimuth. We
suggest that the CO emission of the segment is from the Outer Arm. The physical
mid-plane traced by the Outer Arm seems to be slightly displaced from the
IAU-defined plane on a large scale, which could be explained by the warped
plane at large Galactocentric distances of >~10 kpc and the apparent tilted
mid-plane to the projected IAU-defined plane caused by the Sun's z-height above
the disk for distances near and within the Solar circle. If the inner plane of
our Galaxy is flat, we can derive an upper limit of the Sun's offset of ~17.1
pc above the physical mid-plane of the Milky Way. We also discuss the
correlations between the physical parameters of the distant MCs, which is quite
consistent with the result of other studies of this parameter.


title: Hitting statistics from quantum jumps

abstract:
  We define the hitting time for a model of continuous-time open quantum walks
in terms of quantum jumps. Our starting point is a master equation in Lindblad
form, which can be taken as the quantum analogue of the rate equation for a
classical continuous-time Markov chain. The quantum jump method is well known
in the quantum optics community and has also been applied to simulate open
quantum walks in discrete time. This method however, is well-suited to
continuous-time problems. It is shown here that a continuous-time hitting
problem is amenable to analysis via quantum jumps: The hitting time can be
defined as the time of the first jump. Using this fact, we derive the
distribution of hitting times and explicit exressions for its statistical
moments. Simple examples are considered to illustrate the final results. We
then show that the hitting statistics obtained via quantum jumps is consistent
with a previous definition for a measured walk in discrete time
[Phys.~Rev.~A~{\bf 73}, 032341 (2006)] (when generalised to allow for
non-unitary evolution and in the limit of small time steps). A caveat of the
quantum-jump approach is that it relies on the final state (the state which we
want to hit) to share only incoherent edges with other vertices in the graph.
We propose a simple remedy to restore the applicability of quantum jumps when
this is not the case and show that the hitting-time statistics will again
converge to that obtained from the measured discrete walk in appropriate
limits.


title:
Charged Lepton Flavor Violating Processes and Scalar Leptoquark Decay
  Branching Ratios in the Colored Zee-Babu Model

abstract:
  We consider a neutrino mass generating model which employs a scalar
leptoquark, $\Delta$, and a scalar diquark, $S$. The new scalars $\Delta$ and
$S$ carry the standard model $SU(3)_c\times SU(2)_L\times U(1)_Y$ quantum
numbers $(3,1,-1/3)$ and $(6,1,-2/3)$, respectively. The neutrino masses are
generated at the two-loop level, as in the Zee-Babu model\cite{Zee-Babu}, and
$\Delta/S$ plays the role of the doubly/singly charged scalar in the Zee-Babu
model. With a moderate working assumption that the magnitudes of the six Yukawa
couplings between $S$ and the down-type quarks are of the same order, strong
connections are found between the neutrino masses and the charged lepton flavor
violating processes. In particular, we study $Z\rightarrow \overline{l} l'$,
and $l\rightarrow l' \gamma$ and find that some portions of the parameter space
of this model are within the reach of the planned charged lepton flavor
violating experiments. Interesting lower bounds are predicted that
$B(Z\rightarrow \overline{l} l')\gtrsim
10^{-16}-10^{-14}(10^{-14})\times(1\mbox{TeV}\cdot m_S/7 m_\Delta^2)^2$ and
$B(l\rightarrow l' \gamma)\gtrsim 10^{-17}-10^{-16}(10^{-18}-10^{-16})\times(1
\mbox{TeV}\cdot m_S/7 m_\Delta^2)^2$ for neutrino masses being the
normal(inverted) hierarchical pattern. The type of neutrino mass hierarchy
could also be determined by measuring the charged lepton flavor violating
double ratios. Moreover, definite leptoquark decay branching ratios are
predicted when there is no Yukawa interaction between the right-handed fermions
and $\Delta$ ( the branching fraction of $\Delta$ to a charged lepton and a
quark is 50\%), which could help refine the collider search limit on the scalar
leptoquark mass.


title: Critical Points for Two-view Triangulation

abstract:
  Two-view triangulation is a problem of minimizing a quadratic polynomial
under an equality constraint. We derive a polynomial that encodes the local
minimizers of this problem using the theory of Lagrange multipliers. This
offers a simpler derivation of the critical points that are given in
Hartley-Sturm [6].


title: Data Centroid Based Multi-Level Fuzzy Min-Max Neural Network

abstract:
  Recently, a multi-level fuzzy min max neural network (MLF) was proposed,
which improves the classification accuracy by handling an overlapped region
(area of confusion) with the help of a tree structure. In this brief, an
extension of MLF is proposed which defines a new boundary region, where the
previously proposed methods mark decisions with less confidence and hence
misclassification is more frequent. A methodology to classify patterns more
accurately is presented. Our work enhances the testing procedure by means of
data centroids. We exhibit an illustrative example, clearly highlighting the
advantage of our approach. Results on standard datasets are also presented to
evidentially prove a consistent improvement in the classification rate.


title: A note on ruin problems in perturbed classical risk models

abstract:
  In this short note, we derive explicit formulas for the joint densities of
the time to ruin and the number of claims until ruin in perturbed classical
risk models, by constructing several auxiliary random processes.


title:
Profile likelihood ratio tests for parameter inferences in generalized
  single-index models

abstract:
  A profile likelihood ratio test is proposed for inferences on the index
coefficients in generalized single-index models. Key features include its
simplicity in implementation, invariance against parametrization, and
exhibiting substantially less bias than standard Wald-tests in finite-sample
settings. Moreover, the R routine to carry out the profile likelihood ratio
test is demonstrated to be over two orders of magnitude faster than the
recently proposed generalized likelihood ratio test based on kernel regression.
The advantages of the method are demonstrated on various simulations and a data
analysis example.