title: WiSPA: A new approach for dealing with widespread parasitism

abstract:
  Traditionally, studies of coevolving systems have considered cases where a
parasite may inhabit only a single host. The case where a parasite may infect
many hosts, widespread parasitism, has until recently gained little traction.
This is due in part to the computational complexity involved in reconstructing
the coevolutionary histories where parasites may infect only a single host,
which is NP-Hard. Allowing parasites to inhabit more than one host has been
seen to only further compound this computationally intractable problem.
Recently however, well-established algorithms for estimating the problem
instance where a parasite may infect only a single host have been extended to
handle widespread parasites. Although this has offered significant progress, it
has been noted that these algorithms poorly handle parasites that inhabit
phylogenetically distant hosts.
  In this work we extend these previous algorithms to handle cases where
parasites inhabit phylogenetically distant hosts using an additional
evolutionary event which we call spread. Our new framework is shown to infer
significantly more congruent coevolutionary histories compared to existing
methods over both synthetic and biological data sets. We then apply the newly
proposed algorithm, which we call WiSPA (WideSpread Parasitism Analyser), to
the well studied coevolutionary system of Primates and Enterobius (pinworms),
where existing methods have been unable to reconcile the widespread parasitism
present without permitting additional divergence events. Using WiSPA and the
new biological event, spread, we provide the first statistically significant
coevolutionary hypothesis for this system.


title:
Search for the primordial gravitational waves with Very Long Baseline
  Interferometry

abstract:
  Some models of the expanding Universe predict that the astrometric proper
motion of distant radio sources embedded in space-time are non-zero as the
radial distance from observer to the source grows. Systematic proper motion
effects would produce a predictable quadrupole pattern on the sky that could be
detected using Very Long Baseline Interferometry (VLBI) technique. This
quadrupole pattern can be interpreted either as an anisotropic Hubble
expansion, or as a signature of the primordial gravitational waves in the early
Universe. We present our analysis of a large set of geodetic VLBI data spanning
1979--2015 to estimate the dipole and quadrupole harmonics in the expansion of
the vector field of the proper motions of quasars in the sky. The analysis is
repeated for different redshift zones.


title: Stern-Gerlach splitters for lattice quasispin

abstract:
  We design a Stern-Gerlach apparatus that separates quasispin components on
the lattice, without the use of external fields. The effect is engineered using
intrinsic parameters, such as hopping amplitudes and on-site potentials. A
theoretical description of the apparatus relying on a generalized
Foldy-Wouthuysen transformation beyond Dirac points is given. Our results are
verified numerically by means of wavepacket evolution, including an analysis of
Zitterbewegung on the lattice. The necessary tools for microwave realizations,
such as complex hopping amplitudes and chiral effects, are simulated.


title:
Affine nonexpansive operators, Attouch-Th\'era duality and the
  Douglas-Rachford algorithm

abstract:
  The Douglas-Rachford splitting algorithm was originally proposed in 1956 to
solve a system of linear equations arising from the discretization of a partial
differential equation. In 1979, Lions and Mercier brought forward a very
powerful extension of this method suitable to solve optimization problems.
  In this paper, we revisit the original affine setting. We provide a powerful
convergence result for finding a zero of the sum of two maximally monotone
affine relations. As a by product of our analysis, we obtain results concerning
the convergence of iterates of affine nonexpansive mappings as well as
Attouch-Th\'era duality. Numerous examples are presented.


title:
The free energy requirements of biological organisms; implications for
  evolution

abstract:
  Recent advances in nonequilibrium statistical physics have provided
unprecedented insight into the thermodynamics of dynamic processes. The author
recently used these advances to extend Landauer's semi-formal reasoning
concerning the thermodynamics of bit erasure, to derive the minimal free energy
required to implement an arbitrary computation. Here, I extend this analysis,
deriving the minimal free energy required by an organism to run a given
(stochastic) map $\pi$ from its sensor inputs to its actuator outputs. I use
this result to calculate the input-output map $\pi$ of an organism that
optimally trades off the free energy needed to run $\pi$ with the phenotypic
fitness that results from implementing $\pi$. I end with a general discussion
of the limits imposed on the rate of the terrestrial biosphere's information
processing by the flux of sunlight on the Earth.


title: Minimal Gated Unit for Recurrent Neural Networks

abstract:
  Recently recurrent neural networks (RNN) has been very successful in handling
sequence data. However, understanding RNN and finding the best practices for
RNN is a difficult task, partly because there are many competing and complex
hidden units (such as LSTM and GRU). We propose a gated unit for RNN, named as
Minimal Gated Unit (MGU), since it only contains one gate, which is a minimal
design among all gated hidden units. The design of MGU benefits from evaluation
results on LSTM and GRU in the literature. Experiments on various sequence data
show that MGU has comparable accuracy with GRU, but has a simpler structure,
fewer parameters, and faster training. Hence, MGU is suitable in RNN's
applications. Its simple architecture also means that it is easier to evaluate
and tune, and in principle it is easier to study MGU's properties theoretically
and empirically.


title: The cohomological nature of the Fu-Kane-Mele invariant

abstract:
  In this paper we generalize the definition of the FKMM-invariant introduced
in [DG2] for the case of "Quaternionic" vector bundles over involutive base
spaces endowed with free involution or with a non-finite fixed-point set. In
[DG2] it has already be shown how the FKMM-invariant provides a cohomological
description of the Fu-Kane-Mele index used to classify topological insulators
in class AII. It follows that the FKMM-invariant described in this paper
provides a cohomological generalization of the Fu-Kane-Mele index which is
applicable to the classification of protected phases for other type of
topological quantum systems (TQS) which are not necesarily related to models
for topological insulators (e.g. the two-dimensional models of adiabatically
perturbed systems discussed in [GR]). As a byproduct we provide the complete
classification of "Quaternionic" vector bundles over a big class of low
dimensional involutive spheres and tori.


title:
Detecting and avoiding frontal obstacles from monocular camera for micro
  unmanned aerial vehicles

abstract:
  In literature, several approaches are trying to make the UAVs fly
autonomously i.e., by extracting perspective cues such as straight lines.
However, it is only available in well-defined human made environments, in
addition to many other cues which require enough texture information. Our main
target is to detect and avoid frontal obstacles from a monocular camera using a
quad rotor Ar.Drone 2 by exploiting optical flow as a motion parallax, the
drone is permitted to fly at a speed of 1 m/s and an altitude ranging from 1 to
4 meters above the ground level. In general, detecting and avoiding frontal
obstacle is a quite challenging problem because optical flow has some
limitation which should be taken into account i.e. lighting conditions and
aperture problem.


title:
Accurate Text Localization in Natural Image with Cascaded Convolutional
  Text Network

abstract:
  We introduce a new top-down pipeline for scene text detection. We propose a
novel Cascaded Convolutional Text Network (CCTN) that joints two customized
convolutional networks for coarse-to-fine text localization. The CCTN fast
detects text regions roughly from a low-resolution image, and then accurately
localizes text lines from each enlarged region. We cast previous character
based detection into direct text region estimation, avoiding multiple bottom-
up post-processing steps. It exhibits surprising robustness and discriminative
power by considering whole text region as detection object which provides
strong semantic information. We customize convolutional network by develop- ing
rectangle convolutions and multiple in-network fusions. This enables it to
handle multi-shape and multi-scale text efficiently. Furthermore, the CCTN is
computationally efficient by sharing convolutional computations, and high-level
property allows it to be invariant to various languages and multiple
orientations. It achieves 0.84 and 0.86 F-measures on the ICDAR 2011 and ICDAR
2013, delivering substantial improvements over state-of-the-art results [23,
1].


title: Pure Lovelock gravity and Chern-Simons theory

abstract:
  We explore the possibility of finding Pure Lovelock gravity as a particular
limit of a Chern-Simons action for a specific expansion of the AdS algebra in
odd dimensions. We derive this relation at the level of the action in five and
seven dimensions. Additionally we provide the general result for higher
dimensions and discuss some issues arising from the obtained dynamics.


title: Black hole accretion in scalar-tensor-vector gravity

abstract:
  We examine the accretion of matter onto a black hole in
scalar--tensor--vector gravity (STVG) also known as modified gravity (MOG). The
gravitational constant is $G=G_{N} (1 + \alpha)$ where $\alpha$ is a parameter
taken to be constant for static black holes in the theory. The MOG black hole
is spherically symmetric and characterised by two event horizons. The matter
falling into the black hole obeys the polytrope equation of state and passes
through two critical points before entering the outer horizon. We obtain
analytical expressions for the mass accretion rate as well as for the outer
critical point, critical velocity and critical sound speed. Our results
complement existing strong field tests like lensing and orbital motion and
could be used in conjunction to determine observational constraints on MOG.


title: New Online Ecology of Adversarial Aggregates: ISIS and beyond

abstract:
  Support for extremist entities - whether from the far right, or far left -
often manages to survive globally online despite significant external pressure,
and may ultimately inspire violent acts by individuals having no obvious prior
history of extremism. Examining longitudinal records of extremist online
activity, we uncovered an ecology evolving on a daily timescale that drives
online support, and we provide a mathematical theory that describes it. The
ecology features self-organized aggregates (online groups such as on Facebook
or another social media analog) that proliferate preceding the onset of recent
real-world campaigns, and adopt novel adaptive mechanisms to enhance their
survival. One of the predictions is that development of large, potentially
potent online groups can be thwarted by targeting smaller ones.


title:
Enhanced spin Seebeck effect signal due to spin-momentum locked
  topological surface states

abstract:
  Spin-momentum locking in protected surface states enables efficient
electrical detection of magnon decay at a
magnetic-insulator/topological-insulator heterojunction. Here we demonstrate
this property using the spin Seebeck effect, i.e. measuring the transverse
thermoelectric response to a temperature gradient across a thin film of yttrium
iron garnet, an insulating ferrimagnet, and forming a heterojunction with
(BixSb1-x)2Te3, a topological insulator. The non-equilibrium magnon population
established at the interface can decay in part by interactions of magnons with
electrons near the Fermi energy of the topological insulator. When this decay
channel is made active by tuning (BixSb1-x)2Te3 to a bulk insulator, a large
electromotive force emerges in the direction perpendicular to the in-plane
magnetization of yttrium iron garnet. The enhanced, tunable spin Seebeck effect
which occurs when the Fermi level lies in the bulk gap offers unique advantages
over the usual spin Seebeck effect in metals and therefore opens up exciting
possibilities in spintronics.


title: SET-E: The Search for Extraterrestrial Environmentalism

abstract:
  There is currently no evidence for life on any known exoplanet. Here, we
propose a form of "galactic anthropology" to detect not only the existence of
life on transiting exoplanets, but also the existence of environmentalism
movements. By observing the planet's atmosphere over long time baselines, the
destruction and recovery of a hole in an exoplanet's ozone layer may be
observable. While not readily detectable for any one system with JWST, by
binning together observations of hundreds of systems we can finally determine
the occurrence rate of environmental movements on Earthlike planets in the
galaxy, a number we term eta-Green-Earth.


title: Ordinal Conditional Functions for Nearly Counterfactual Revision

abstract:
  We are interested in belief revision involving conditional statements where
the antecedent is almost certainly false. To represent such problems, we use
Ordinal Conditional Functions that may take infinite values. We model belief
change in this context through simple arithmetical operations that allow us to
capture the intuition that certain antecedents can not be validated by any
number of observations. We frame our approach as a form of finite belief
improvement, and we propose a model of conditional belief revision in which
only the "right" hypothetical levels of implausibility are revised.


title: Reconsidering Local Hidden Variables: When One is Enough

abstract:
  In this Letter, we explore the possibility of developing Bell inequalities
predicated on models using a single Local Hidden Variable (s-LHV), a strict
subset of general LHV models. Because of the less strenuous constraints imposed
by s-LHV models, we were able to derive a contingent Bell inequality in analogy
to the CHSH inequality, but which does not require bounding of measurement
statistics. Following this, we show by explicit example that there are cases of
states that rule out s-LHV models by violating our inequality, but which
nonetheless have a multivariate LHV model. Even so, we show how merely ruling
out s-LHV models is still sufficient to allow for fully device independent
quantum key distribution (QKD) and entanglement witnessing. This being the
case, our inequality illustrates two things. First, it makes fully
device-independent QKD on continuous variables substantially more
straightforward. Second, it shows how the degree of correlation needed to
demonstrate device-independent QKD is distinct from both Bell-nonlocality and
EPR-steering. Although nonlocality in general requires ruling out all LHV
models, s-LHV models are sufficiently useful to warrant further exploration.


title:
Physics Accomplishments and Future Prospects of the BES Experiments at
  the BEPC Collider

abstract:
  The cornerstone of the Chinese experimental particle physics program consists
of a series of experiments performed in the tau-charm energy region. China
began building e+e- colliders at the Institute for High Energy Physics in
Beijing more than three decades ago. Beijing Electron Spectrometer, BES, is the
common root name for the particle physics detectors operated at these machines.
The development of the BES program is summarized and highlights of the physics
results across several topical areas are presented.


title:
Trace Identities for the matrix Schr\"odinger operator on the half line
  with general boundary conditions

abstract:
  We prove Buslaev-Faddeev trace identities for the matrix Schr\"odinger
operator on the half line, with general boundary conditions at the origin, and
with selfadjoint matrix potentials.


title: Deformed Fourier models with formal parameters

abstract:
  The deformed Fourier matrices $H=F_M\otimes_QF_N$, with $Q\in\mathbb T^{MN}$,
produce a matrix model $C(S_{MN}^+)\to M_{MN}(C(\mathbb T^{MN}))$. When
$Q\in\mathbb T^{MN}$ is generic, the corresponding fiber can be investigated
via algebraic techniques, and the main character law is asymptotically free
Poisson. We present here an alternative point of view on these questions, using
formal parameters instead of generic parameters, and analytic tools.


title: Document Selection in a Distributed Search Engine Architecture

abstract:
  Distributed Search Engine Architecture (DSEA) hosts numerous independent
topic-specific search engines and selects a subset of the databases to search
within the architecture. The objective of this approach is to reduce the amount
of space needed to perform a search by querying only a subset of the total data
available. In order to manipulate data across many databases, it is most
efficient to identify a smaller subset of databases that would be most likely
to return the data of specific interest that can then be examined in greater
detail. The selection index has been most commonly used as a method for
choosing the most applicable databases as it captures broad information about
each database and its indexed documents. Employing this type of database allows
the researcher to find information more quickly, not only with less cost, but
it also minimizes the potential for biases. This paper investigates the
effectiveness of different databases selected within the framework and scope of
the distributed search engine architecture. The purpose of the study is to
improve the quality of distributed information retrieval.


title: On the rigidity of mean convex self-shrinkers

abstract:
  Self-shrinkers model singularities of the mean curvature flow; they are
defined as the special solutions that contract homothetically under the flow.
Colding-Ilmanen-Minicozzi showed that cylindrical self-shrinkers are rigid in a
strong sense - that is, any self-shrinker that is mean convex with uniformly
bounded curvature on a large, but compact, set must be a round cylinder. Using
this result, Colding and Minicozzi were able to establish uniqueness of blowups
at cylindrical singularities, and provide a detailed description of the
singular set of generic mean curvature flows.
  In this paper, we show that the bounded curvature assumption is unnecessary
for the rigidity of the cylinder if either n is at most 6, or if the mean
curvature is bounded below by a positive constant. These results follow from
curvature estimates that we prove for strictly mean convex self-shrinkers. We
also obtain a rigidity theorem in all dimensions for graphical self-shrinkers,
and curvature estimates for translators of the mean curvature flow.


title: Predictability of Popularity: Gaps between Prediction and Understanding

abstract:
  Can we predict the future popularity of a song, movie or tweet? Recent work
suggests that although it may be hard to predict an item's popularity when it
is first introduced, peeking into its early adopters and properties of their
social network makes the problem easier. We test the robustness of such claims
by using data from social networks spanning music, books, photos, and URLs. We
find a stronger result: not only do predictive models with peeking achieve high
accuracy on all datasets, they also generalize well, so much so that models
trained on any one dataset perform with comparable accuracy on items from other
datasets.
  Though practically useful, our models (and those in other work) are
intellectually unsatisfying because common formulations of the problem, which
involve peeking at the first small-k adopters and predicting whether items end
up in the top half of popular items, are both too sensitive to the speed of
early adoption and too easy. Most of the predictive power comes from looking at
how quickly items reach their first few adopters, while for other features of
early adopters and their networks, even the direction of correlation with
popularity is not consistent across domains. Problem formulations that examine
items that reach k adopters in about the same amount of time reduce the
importance of temporal features, but also overall accuracy, highlighting that
we understand little about why items become popular while providing a context
in which we might build that understanding.


title: Exact Lagrangian tori in $T^*\mathbb{T}^n$

abstract:
  We show that for $n\geq 2$ there exists an exact Lagrangian submanifold $L$
in the cotangent bundle $T^*\mathbb{T}^n$ of the $n$-dimensional torus
$\mathbb{T}^n$ such that $L$ is symplectically but not Hamiltonian isotopic to
the zero section of $T^*\mathbb{T}^n$.


title: MARZ: Manual and Automatic Redshifting Software

abstract:
  The Australian Dark Energy Survey (OzDES) is a 100-night spectroscopic survey
underway on the Anglo-Australian Telescope using the fibre-fed 2-degree-field
(2dF) spectrograph. We have developed a new redshifting application Marz with
greater usability, flexibility, and the capacity to analyse a wider range of
object types than the Runz software package previously used for redshifting
spectra from 2dF. Marz is an open-source, client-based, Javascript
web-application which provides an intuitive interface and powerful automatic
matching capabilities on spectra generated from the AAOmega spectrograph to
produce high quality spectroscopic redshift measurements. The software can be
run interactively or via the command line, and is easily adaptable to other
instruments and pipelines if conforming to the current FITS file standard is
not possible. Behind the scenes, a modified version of the Autoz
cross-correlation algorithm is used to match input spectra against a variety of
stellar and galaxy templates, and automatic matching performance for OzDES
spectra has increased from 54% (Runz) to 91% (Marz). Spectra not matched
correctly by the automatic algorithm can be easily redshifted manually by
cycling automatic results, manual template comparison, or marking spectral
features.


title: The Open World of Micro-Videos

abstract:
  Micro-videos are six-second videos popular on social media networks with
several unique properties. Firstly, because of the authoring process, they
contain significantly more diversity and narrative structure than existing
collections of video "snippets". Secondly, because they are often captured by
hand-held mobile cameras, they contain specialized viewpoints including
third-person, egocentric, and self-facing views seldom seen in traditional
produced video. Thirdly, due to to their continuous production and publication
on social networks, aggregate micro-video content contains interesting
open-world dynamics that reflects the temporal evolution of tag topics. These
aspects make micro-videos an appealing well of visual data for developing
large-scale models for video understanding. We analyze a novel dataset of
micro-videos labeled with 58 thousand tags. To analyze this data, we introduce
viewpoint-specific and temporally-evolving models for video understanding,
defined over state-of-the-art motion and deep visual features. We conclude that
our dataset opens up new research opportunities for large-scale video analysis,
novel viewpoints, and open-world dynamics.


title: Superconductivity in magnetic multipole states

abstract:
  Stimulated by recent studies of superconductivity and magnetism with local
and global broken inversion symmetry, we investigate the superconductivity in
magnetic multipole states in locally noncentrosymmetric metals. We consider a
one-dimensional zigzag chain with sublattice-dependent antisymmetric spin-orbit
coupling and suppose three magnetic multipole orders: monopole order, dipole
order, and quadrupole order. It is demonstrated that the
Bardeen-Cooper-Schrieffer state, the pair-density wave (PDW) state, and the
Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state are stabilized by these multipole
orders, respectively. We show that the PDW state is a topological
superconducting state specified by the nontrivial $\mathbb{Z}_2$ number and
winding number. The origin of the FFLO state without macroscopic magnetic
moment is attributed to the asymmetric band structure induced by the magnetic
quadrupole order and spin-orbit coupling.


title: A Stratified Analysis of Bayesian Optimization Methods

abstract:
  Empirical analysis serves as an important complement to theoretical analysis
for studying practical Bayesian optimization. Often empirical insights expose
strengths and weaknesses inaccessible to theoretical analysis. We define two
metrics for comparing the performance of Bayesian optimization methods and
propose a ranking mechanism for summarizing performance within various genres
or strata of test functions. These test functions serve to mimic the complexity
of hyperparameter optimization problems, the most prominent application of
Bayesian optimization, but with a closed form which allows for rapid evaluation
and more predictable behavior. This offers a flexible and efficient way to
investigate functions with specific properties of interest, such as oscillatory
behavior or an optimum on the domain boundary.


title:
Magneto-hydrodynamical Numerical simulation of wind production from
  black hole hot accretion flows at very large radii

abstract:
  Numerical simulations of black hole hot accretion flows have shown the
existence of strong wind. Those works focus only on the region close to black
hole thus it is unknown whether or where the wind production stops at large
radii. To address this question, Bu et al. (2016) have performed hydrodynamic
(HD) simulations by taking into account the gravitational potential of both the
black hole and the nuclear star clusters. The latter is assumed to be $\propto
\sigma^2 \ln(r)$, with $\sigma$ being the velocity dispersion of stars and $r$
be the distance from the center of the galaxy. It was found that when the
gravity is dominated by nuclear stars, i.e., outside of radius $R_A\equiv
GM_{\rm BH}/\sigma^2$, winds can no longer be produced. That work, however,
neglects the magnetic field, which is believed to play a crucial dynamical role
in the accretion and thus must be taken into account. In this paper, we revisit
this problem by performing magneto-hydrodynamical (MHD) simulations. We confirm
the result of Bu et al. (2016), namely wind can't be produced at the region of
$R>R_A$. Our result, combined with the results of Yuan et al. (2015), indicates
that the formula describing the mass flux of wind $\dot{M}_{\rm
wind}=\dot{M}_{\rm BH}(r/20r_s)$ can only be applied to the region where the
black hole potential is dominant. Here $\dot{M}_{\rm BH}$ is the mass accretion
rate at the black hole horizon and the value of $R_A$ is similar to the Bondi
radius.


title: Geometric approaches to the thermodynamics of black holes

abstract:
  In this summary, we present the main topics of the talks presented in the
parallel session "Black holes - 5" of the 14th Marcel Grossmann Meeting held in
Rome, Italy in July 2015. We first present a short review of the main
approaches used to understand thermodynamics by using differential geometry.
Then, we present a brief summary of each presentation, including some general
remarks and comments.


title: Investigation of two-frequency Paul traps for antihydrogen production

abstract:
  Radio-frequency (rf) Paul traps operated with multifrequency rf trapping
potentials provide the ability to independently confine charged particle
species with widely different charge-to-mass ratios. In particular, these traps
may find use in the field of antihydrogen recombination, allowing antiproton
and positron clouds to be trapped and confined in the same volume without the
use of large superconducting magnets. We explore the stability regions of
two-frequency Paul traps and perform numerical simulations of small,
multispecies charged-particle mixtures that indicate the promise of these traps
for antihydrogen recombination.


title: Pentavalent symmetric graphs of order twice a prime power

abstract:
  A connected symmetric graph of prime valency is {\em basic} if its
automorphism group contains no nontrivial normal subgroup having more than two
orbits. Let $p$ be a prime and $n$ a positive integer. In this paper, we
investigate properties of connected pentavalent symmetric graphs of order
$2p^n$, and it is shown that a connected pentavalent symmetric graph of order
$2p^n$ is basic if and only if it is either a graph of order $6$, $16$, $250$,
or a graph of three infinite families of Cayley graphs on generalized dihedral
groups -- one family has order $2p$ with $p=5$ or $5 \mid (p-1)$, one family
has order $2p^2$ with $5 \mid (p\pm 1)$, and the other family has order $2p^4$.
Furthermore, the automorphism groups of these basic graphs are computed.
Similar works on cubic and tetravalent symmetric graphs of order $2p^n$ have
been done.
  It is shown that basic graphs of connected pentavalent symmetric graphs of
order $2p^n$ are symmetric elementary abelian covers of the dipole $\Dip_5$,
and with covering techniques, uniqueness and automorphism groups of these basic
graphs are determined. Moreover, symmetric $\mz_p^n$-covers of the dipole
$\Dip_5$ are classified. As a byproduct, connected pentavalent symmetric graphs
of order $2p^2$ are classified.


title:
Object Skeleton Extraction in Natural Images by Fusing Scale-associated
  Deep Side Outputs

abstract:
  Object skeleton is a useful cue for object detection, complementary to the
object contour, as it provides a structural representation to describe the
relationship among object parts. While object skeleton extraction in natural
images is a very challenging problem, as it requires the extractor to be able
to capture both local and global image context to determine the intrinsic scale
of each skeleton pixel. Existing methods rely on per-pixel based multi-scale
feature computation, which results in difficult modeling and high time
consumption. In this paper, we present a fully convolutional network with
multiple scale-associated side outputs to address this problem. By observing
the relationship between the receptive field sizes of the sequential stages in
the network and the skeleton scales they can capture, we introduce a
scale-associated side output to each stage. We impose supervision to different
stages by guiding the scale-associated side outputs toward groundtruth
skeletons of different scales. The responses of the multiple scale-associated
side outputs are then fused in a scale-specific way to localize skeleton pixels
with multiple scales effectively. Our method achieves promising results on two
skeleton extraction datasets, and significantly outperforms other competitors.


title: Band alignment of two-dimensional lateral heterostructures

abstract:
  Recent experimental synthesis of two-dimensional (2D) heterostructures opens
a door to new opportunities in tailoring the electronic properties for novel 2D
devices. Here, we show that a wide range of lateral 2D heterostructures could
have a prominent advantage over the traditional three-dimensional (3D)
heterostructures, because their band alignments are insensitive to the
interfacial conditions. They should be at the Schottky-Mott limits for
semiconductor-metal junctions and at the Anderson limits for semiconductor
junctions, respectively. This fundamental difference from the 3D
heterostructures is rooted in the fact that, in the asymptotic limit of large
distance, the effect of the interfacial dipole vanishes for 2D systems. Due to
the slow decay of the dipole field and the dependence on the vacuum thickness,
however, studies based on first-principles calculations often failed to reach
such a conclusion. Taking graphene/hexagonal-BN and MoS2/WS2 lateral
heterostructures as the respective prototypes, we show that the converged
junction width can be order of magnitude longer than that for 3D junctions. The
present results provide vital guidance to high-quality transport devices
wherever a lateral 2D heterostructure is involved.


title:
An improved algorithm for the vertex cover $P_3$ problem on graphs of
  bounded treewidth

abstract:
  Given a graph $G=(V,E)$ and a positive integer $t\geq2$, the task in the
vertex cover $P_t$ ($VCP_t$) problem is to find a minimum subset of vertices
$F\subseteq V$ such that every path of order $t$ in $G$ contains at least one
vertex from $F$. The $VCP_t$ problem is NP-complete for any integer $t\geq2$
and has many applications in real world. Recently, the authors presented a
dynamic programming algorithm running in time $4^p\cdot n^{O(1)}$ for the
$VCP_3$ problem on $n$-vertex graphs with treewidth $p$. In this paper, we
propose an improvement of it and improved the time-complexity to $3^p\cdot
n^{O(1)}$.
  The connected vertex cover $P_3$ ($CVCP_3$) problem is the connected
variation of the $VCP_3$ problem where $G[F]$ is required to be connected.
Using the Cut\&Count technique, we give a randomized algorithm with runtime
$4^p\cdot n^{O(1)}$ for the $CVCP_3$ problem on $n$-vertex graphs with
treewidth $p$.


title: TiDeH: Time-Dependent Hawkes Process for Predicting Retweet Dynamics

abstract:
  Online social networking services allow their users to post content in the
form of text, images or videos. The main mechanism driving content diffusion is
the possibility for users to re-share the content posted by their social
connections, which may then cascade across the system. A fundamental problem
when studying information cascades is the possibility to develop sound
mathematical models, whose parameters can be calibrated on empirical data, in
order to predict the future course of a cascade after a window of observation.
In this paper, we focus on Twitter and, in particular, on the temporal patterns
of retweet activity for an original tweet. We model the system by
Time-Dependent Hawkes process (TiDeH), which properly takes into account the
circadian nature of the users and the aging of information. The input of the
prediction model are observed retweet times and structural information about
the underlying social network. We develop a procedure for parameter
optimization and for predicting the future profiles of retweet activity at
different time resolutions. We validate our methodology on a large corpus of
Twitter data and demonstrate its systematic improvement over existing
approaches in all the time regimes.


title:
Post-Newtonian parameters and cosmological constant of screened modified
  gravity

abstract:
  Screened modified gravity (SMG) is a kind of scalar-tensor theories with
screening mechanisms, which can generate screening effect to suppress the fifth
force in high density environments and pass the solar system tests. Meanwhile,
the potential of scalar field in the theories can drive the acceleration of the
late universe. In this paper, we calculate the parameterized post-Newtonian
(PPN) parameters $\gamma$ and $\beta$, the effective gravitational constant
$G_{\rm eff}$ and the effective cosmological constant $\Lambda$ for SMG with a
general potential $V$ and coupling function $A$. The dependence of these
parameters on the model parameters of SMG and/or the physical properties of the
source object are clearly presented. As an application of these results, we
focus on three specific theories of SMG (chameleon, symmetron and dilaton
models). Using the formulae to calculate their PPN parameters and cosmological
constant, we derive the constraints on the model parameters by combining the
observations on solar system and cosmological scales.


title: Charged Membranes: Poisson-Boltzmann theory, DLVO paradigm and beyond

abstract:
  In this chapter we review the electrostatic properties of charged membranes
in aqueous solutions, with or without added salt, employing simple physical
models. The equilibrium ionic profiles close to the membrane are governed by
the well-known Poisson-Boltzmann (PB) equation. We analyze the effect of
different boundary conditions, imposed by the membrane, on the ionic profiles
and the corresponding osmotic pressure. The discussion is separated into the
single membrane case and that of two interacting membranes. For one membrane
setup, we show the different solutions of the PB equation and discuss the
interplay between constant-charge and constant-potential boundary conditions. A
modification of the PB theory is presented to treat the extremely high
counter-ion concentration in the vicinity of a charge membrane. For two
equally-charged membranes, we analyze the different pressure regimes for the
constant-charge boundary condition, and discuss the difference in the osmotic
pressure for various boundary conditions. The non-equal charged membranes is
reviewed as well, and the crossover from repulsion to attraction is calculated
analytically. We then examine the charge-regulation boundary condition and
discuss its effects on the ionic profiles and the osmotic pressure for two
equally-charged membranes. In the last section, we briefly review the van der
Waals (vdW) interactions and their effect on the free energy between two planar
membranes. We explain the simple Hamaker pair-wise summation procedure, and
introduce the more rigorous Lifshitz theory. The latter is a key ingredient in
the DLVO theory, which combines repulsive electrostatic with attractive vdW
interactions, and offers a simple explanation for colloidal or membrane
stability. Finally, the chapter ends by a short account of the limitations of
the approximations inherent in the PB theory.


title:
Two-Dimensional Quantum ring in a Graphene Layer in the presence of a
  Aharonov-Bohm flux

abstract:
  In this paper we study the relativistic quantum dynamics of a massless
fermion confined in a quantum ring. We use a model of confining potential and
introduce the interaction via Dirac oscillator coupling, which provides ring
confinement for massless Dirac fermions. We obtain the energy levels and
corresponding eigenfuctions for this model in graphene layer in the presence of
Aharonov-Bohm flux in the centre of the ring and the expression for persistent
current in this model. We also investigate the model for quantum ring in
graphene layer in the presence of disclination and magnetic flux. The energy
spectrum and wave function are obtained exactly for this case. We see that the
persistent current depends in parameters characterizing the topological defect.


title: An overview and perspective on social network monitoring

abstract:
  In this expository paper we give an overview of some statistical methods for
the monitoring of social networks. We discuss the advantages and limitations of
various methods as well as some relevant issues. One of our primary
contributions is to give the relationships between network monitoring methods
and monitoring methods in engineering statistics and public health
surveillance. We encourage researchers in the industrial process monitoring
area to work on developing and comparing the performance of social network
monitoring methods. We also discuss some of the issues in social network
monitoring and give a number of research ideas.


title: Exemplar-AMMs: Recognizing Crowd Movements from Pedestrian Trajectories

abstract:
  In this paper, we present a novel method to recognize the types of crowd
movement from crowd trajectories using agent-based motion models (AMMs). Our
idea is to apply a number of AMMs, referred to as exemplar-AMMs, to describe
the crowd movement. Specifically, we propose an optimization framework that
filters out the unknown noise in the crowd trajectories and measures their
similarity to the exemplar-AMMs to produce a crowd motion feature. We then
address our real-world crowd movement recognition problem as a multi-label
classification problem. Our experiments show that the proposed feature
outperforms the state-of-the-art methods in recognizing both simulated and
real-world crowd movements from their trajectories. Finally, we have created a
synthetic dataset, SynCrowd, which contains 2D crowd trajectories in various
scenarios, generated by various crowd simulators. This dataset can serve as a
training set or benchmark for crowd analysis work.


title: Tensor renormalization group analysis of CP(N-1) model

abstract:
  We apply the higher-order tensor renormalization group to the lattice
CP($N-1$) model in two dimensions. A tensor network representation of the
CP($N-1$) model in the presence of the $\theta$ term is derived. We confirm
that the numerical results of the CP(1) model without the $\theta$ term using
this method are consistent with that of the O(3) model which is analyzed by the
same method in the region $\beta \gg 1$ and that obtained by the Monte Carlo
simulation in a wider range of $\beta$. The numerical computation including the
$\theta$ term is left for future challenges.


abstract:
  We study potential scattering in a two-dimensional electron gas with Rashba
spin-orbit coupling in the limit that the energy of the scattering electron
approaches the bottom of the lower spin-split band. Focusing on two
spin-independent circularly symmetric potentials, an infinite barrier and a
delta-function shell, we show that scattering in this limit is qualitatively
different from both scattering in the higher spin-split band and scattering of
electrons without spin-orbit coupling. The scattering matrix is purely
off-diagonal with both off-diagonal elements equal to one, and all angular
momentum channels contribute equally; the differential cross section becomes
increasingly peaked in the forward and backward scattering directions; the
total cross section exhibits quantized plateaus. These features are independent
of the details of the scattering potentials, and we conjecture them to be
universal. Our results suggest that Rashba scattering in the low-energy limit
becomes effectively one-dimensional.


title: LSTM based Conversation Models

abstract:
  In this paper, we present a conversational model that incorporates both
context and participant role for two-party conversations. Different
architectures are explored for integrating participant role and context
information into a Long Short-term Memory (LSTM) language model. The
conversational model can function as a language model or a language generation
model. Experiments on the Ubuntu Dialog Corpus show that our model can capture
multiple turn interaction between participants. The proposed method outperforms
a traditional LSTM model as measured by language model perplexity and response
ranking. Generated responses show characteristic differences between the two
participant roles.


title:
Generalized ridge estimator and model selection criterion in
  multivariate linear regression

abstract:
  We propose new model selection criteria based on generalized ridge estimators
dominating the maximum likelihood estimator under the squared risk and the
Kullback-Leibler risk in multivariate linear regression. Our model selection
criteria have the following favorite properties: consistency, unbiasedness,
uniformly minimum variance. Consistency is proven under an asymptotic structure
$\frac{p}{n}\to c$ where $n$ is the sample size and $p$ is the parameter
dimension of the response variables. In particular, our proposed class of
estimators dominates the maximum likelihood estimator under the squared risk
even when the model does not include the true model. Experimental results show
that the risks of our model selection criteria are smaller than the ones based
on the maximum likelihood estimator and that our proposed criteria specify the
true model under some conditions.


title:
Alignment and measurement of the magnetic field for the BESIII muon
  counter

abstract:
  Based on cosmic ray events without a magnetic field taken with the BESIII
detector during the summer shutdown of BEPCII in 2012 and di-muon events from a
data sample taken at center-of-mass energy of 3.686 GeV in 2009, we compare the
coordinates of hits registered in the BESIII muon counter with the expected
interaction point extrapolated from reconstructed tracks from the inner
tracking system in the absence of a magnetic field. By minimizing the
difference, we align the muon counter with the inner tracking system. Moreover,
the strength of the magnetic field in the muon counter is measured for the
first time with di-muon events from data taken at a center-of-mass energy of
3.686~GeV. After the alignment and the magnetic field strength measurement, the
offsets in the reconstructed hit positions for muon tracks are reduced, which
improves the muon identification. The alignment and magnetic field strength
measurement have been adopted in the latest version of the BESIII offline
software system. This addition to the software reduces the systematic
uncertainty for the physics analysis in cases where the muon counter
information is used.


title: System Combination for Short Utterance Speaker Recognition

abstract:
  For text-independent short-utterance speaker recognition (SUSR), the
performance often degrades dramatically. This paper presents a combination
approach to the SUSR tasks with two phonetic-aware systems: one is the
DNN-based i-vector system and the other is our recently proposed
subregion-based GMM-UBM system. The former employs phone posteriors to
construct an i-vector model in which the shared statistics offers stronger
robustness against limited test data, while the latter establishes a
phone-dependent GMM-UBM system which represents speaker characteristics with
more details. A score-level fusion is implemented to integrate the respective
advantages from the two systems. Experimental results show that for the
text-independent SUSR task, both the DNN-based i-vector system and the
subregion-based GMM-UBM system outperform their respective baselines, and the
score-level system combination delivers performance improvement.


title:
Detection of Dispersed Radio Pulses: A machine learning approach to
  candidate identification and classification

abstract:
  Searching for extraterrestrial, transient signals in astronomical data sets
is an active area of current research. However, machine learning techniques are
lacking in the literature concerning single-pulse detection. This paper
presents a new, two-stage approach for identifying and classifying dispersed
pulse groups (DPGs) in single-pulse search output. The first stage identified
DPGs and extracted features to characterize them using a new peak
identification algorithm which tracks sloping tendencies around local maxima in
plots of signal-to-noise ratio vs. dispersion measure. The second stage used
supervised machine learning to classify DPGs. We created four benchmark data
sets: one unbalanced and three balanced versions using three different
imbalance treatments.We empirically evaluated 48 classifiers by training and
testing binary and multiclass versions of six machine learning algorithms on
each of the four benchmark versions. While each classifier had advantages and
disadvantages, all classifiers with imbalance treatments had higher recall
values than those with unbalanced data, regardless of the machine learning
algorithm used. Based on the benchmarking results, we selected a subset of
classifiers to classify the full, unlabelled data set of over 1.5 million DPGs
identified in 42,405 observations made by the Green Bank Telescope. Overall,
the classifiers using a multiclass ensemble tree learner in combination with
two oversampling imbalance treatments were the most efficient; they identified
additional known pulsars not in the benchmark data set and provided six
potential discoveries, with significantly less false positives than the other
classifiers.


title:
Robust Uncalibrated Stereo Rectification with Constrained Geometric
  Distortions (USR-CGD)

abstract:
  A novel algorithm for uncalibrated stereo image-pair rectification under the
constraint of geometric distortion, called USR-CGD, is presented in this work.
Although it is straightforward to define a rectifying transformation (or
homography) given the epipolar geometry, many existing algorithms have unwanted
geometric distortions as a side effect. To obtain rectified images with reduced
geometric distortions while maintaining a small rectification error, we
parameterize the homography by considering the influence of various kinds of
geometric distortions. Next, we define several geometric measures and
incorporate them into a new cost function for parameter optimization. Finally,
we propose a constrained adaptive optimization scheme to allow a balanced
performance between the rectification error and the geometric error. Extensive
experimental results are provided to demonstrate the superb performance of the
proposed USR-CGD method, which outperforms existing algorithms by a significant
margin.


title:
$\psi$-Epistemic Models, Einsteinian Intuitions, and No-Gos. A Critical
  Study of Recent Developments on the Quantum State

abstract:
  Quantum mechanics notoriously faces the measurement problem, the problem that
if read thoroughly, it implies the nonexistence of definite outcomes in
measurement procedures. A plausible reaction to this and to related problems is
to regard a system's quantum state $|\psi\rangle$ merely as an indication of
our lack of knowledge about the system, i.e., to interpret it epistemically.
However, there are radically different ways to spell out such an epistemic view
of the quantum state. We here investigate recent developments in the branch
that introduces hidden variables $\lambda$ in addition to the quantum state
$|\psi\rangle$ and has its roots in Einstein's views. In particular, we
confront purported achievements of a concrete model that has been considered to
serve as evidence for an epistemic view of the envisioned kind, as well as
specific no-go results and their import. It will be argued that while an
epistemic account of the particular kind is not straightforwardly ruled out by
the no-go results, they demonstrate that the evidential character of the
model(s) discussed rests on a rather shaky foundation, and that they make some
achievements widely recognized in the literature appear worthy of doubt.


title:
Asymptotic profile of solutions to the linearized compressible
  Navier-Stokes flow

abstract:
  We consider the asymptotic behavior as time goes to infinity of the
$L^{2}$-norm of the velocity of the linearized compressible Navier-Stokes
equations in ${\bf R}^{n}$ ($n \geq 2$). As an application we shall study the
optimality of the decay rate for the $L^{2}$-norm of the velocity by deriving
the decay estimate from below as time goes to infinity.


title: A New Approach for Revising Logic Programs

abstract:
  Belief revision has been studied mainly with respect to background logics
that are monotonic in character. In this paper we study belief revision when
the underlying logic is non-monotonic instead--an inherently interesting
problem that is under explored. In particular, we will focus on the revision of
a body of beliefs that is represented as a logic program under the answer set
semantics, while the new information is also similarly represented as a logic
program. Our approach is driven by the observation that unlike in a monotonic
setting where, when necessary, consistency in a revised body of beliefs is
maintained by jettisoning some old beliefs, in a non-monotonic setting
consistency can be restored by adding new beliefs as well. We will define a
syntactic revision function and subsequently provide representation theorem for
characterising it.


title:
Theory of multiple--phase competition in pyrochlore magnets with
  anisotropic exchange, with application to Yb2Ti2O7, Er2Ti2O7 and Er2Sn2O7

abstract:
  The family of magnetic rare-earth pyrochlore oxides R2M2O7 plays host to a
diverse array of exotic phenomena, driven by the interplay between geometrical
frustration and spin-orbit interaction, which leads to anisotropy in both
magnetic moments and their interactions. In this article we establish a
general, symmetry--based theory of pyrochlore magnets with anisotropic exchange
interactions. Starting from a very general model of nearest-neighbour exchange
between Kramers ions, we find four distinct classical ordered states, all with
q=0, competing with a variety of spin-liquids and unconventional forms of
magnetic order. The finite-temperature phase diagram of this model is
determined by Monte Carlo simulation, supported by classical spin-wave
calculations. We pay particular attention to the region of parameter space
relevant to the widely studied materials Er2Ti2O7, Yb2Ti2O7, and Er2Sn2O7. We
find that many of the most interesting properties of these materials can be
traced back to the "accidental" degeneracies where phases with different
symmetries meet. These include the ordered ground state selection by
fluctuations in Er2Ti2O7, the dimensional-reduction observed in Yb2Ti2O7, and
the lack of reported magnetic order in Er2Sn2O7. We also discuss the
application of this theory to other pyrochlore oxides.


title: Canonical structure of BHT massive gravity in warped AdS3 sector

abstract:
  We investigate the asymptotic structure of the three dimensional warped anti
de sitter black holes in the Bergshoeff, Hohm and Townsend massive gravity
using the canonical Hamiltonian formalism. We define the canonical asymptotic
guage generators, which produce the conserved charges and the asymptotic
symmetry group for the warped anti de sitter black holes. The attained symmetry
group is described by a semi direct sum of a Virasoro and a KacMoody algebra.
Using the Sugawara construction, we obtain a direct sum of two Virasoro
algebras. We show that not only the asymptotic conserved charges satisfy the
first law of black hole thermodynamics, but also they lead to the expected
Smarr formula for the warped anti de sitter black holes. We also show that the
black hole entropy obeys the Cardy formula of the dual conformal field theory .


title: Radial symmetry results for fractional Laplacian systems

abstract:
  In this paper, we generalize the direct method of moving planes for the
fractional Laplacian to the system case. Considering a coupled nonlinear system
with fractional Laplacian, we first establish a decay at infinity principle and
a narrow region principle. Using these principles, we obtain two radial
symmetry results for the decaying solutions of the fractional Laplacian
systems. Our method can be applied to fractional Schr\"odinger systems and
fractional H\'enon systems.


title: A ParaBoost Stereoscopic Image Quality Assessment (PBSIQA) System

abstract:
  The problem of stereoscopic image quality assessment, which finds
applications in 3D visual content delivery such as 3DTV, is investigated in
this work. Specifically, we propose a new ParaBoost (parallel-boosting)
stereoscopic image quality assessment (PBSIQA) system. The system consists of
two stages. In the first stage, various distortions are classified into a few
types, and individual quality scorers targeting at a specific distortion type
are developed. These scorers offer complementary performance in face of a
database consisting of heterogeneous distortion types. In the second stage,
scores from multiple quality scorers are fused to achieve the best overall
performance, where the fuser is designed based on the parallel boosting idea
borrowed from machine learning. Extensive experimental results are conducted to
compare the performance of the proposed PBSIQA system with those of existing
stereo image quality assessment (SIQA) metrics. The developed quality metric
can serve as an objective function to optimize the performance of a 3D content
delivery system.


title:
Behavior as $t\rightarrow \infty$ of Solutions of a problem in
  Mathematical Physics

abstract:
  A class of solutions, decaying as $t\rightarrow \infty$, of a two-dimensional
model problem on the oscillations of an ideal rotating fluid in some domains
with angular points is constructed explicitly. The existence of solutions whose
$L_2$-norms decrease more rapidly than any negative power of $t$, is
established.


title:
Boundary-value problem for fractional heat equation involving
  Caputo-Fabrizio derivative

abstract:
  In this work, we consider a number of boundary-value problems for
time-fractional heat equation with the recently introduced Caputo-Fabrizio
derivative. Using the method of separation of variables, we prove a unique
solvability of the stated problems. Moreover, we have found an explicit
solution to certain initial value problem for Caputo-Fabrizio fractional order
differential equation by reducing the problem to a Volterra integral equation.
Different forms of solution were presented depending on the values of the
parameter appeared in the problem.


title: Asymptotic Optimal Tracking: Feedback Strategies

abstract:
  This is a companion paper to (Cai, Rosenbaum and Tankov, Asymptotic lower
bounds for optimal tracking: a linear programming approach, arXiv:1510.04295).
We consider a class of strategies of feedback form for the problem of tracking
and study their performance under the asymptotic framework of the above
reference. The strategies depend only on the current state of the system and
keep the deviation from the target inside a time-varying domain. Although the
dynamics of the target is non-Markovian, it turns out that such strategies are
asympototically optimal for a large list of examples.


title:
Learning Compatibility Across Categories for Heterogeneous Item
  Recommendation

abstract:
  Identifying relationships between items is a key task of an online
recommender system, in order to help users discover items that are functionally
complementary or visually compatible. In domains like clothing recommendation,
this task is particularly challenging since a successful system should be
capable of handling a large corpus of items, a huge amount of relationships
among them, as well as the high-dimensional and semantically complicated
features involved. Furthermore, the human notion of "compatibility" to capture
goes beyond mere similarity: For two items to be compatible---whether jeans and
a t-shirt, or a laptop and a charger---they should be similar in some ways, but
systematically different in others.
  In this paper we propose a novel method, Monomer, to learn complicated and
heterogeneous relationships between items in product recommendation settings.
Recently, scalable methods have been developed that address this task by
learning similarity metrics on top of the content of the products involved.
Here our method relaxes the metricity assumption inherent in previous work and
models multiple localized notions of 'relatedness,' so as to uncover ways in
which related items should be systematically similar, and systematically
different. Quantitatively, we show that our system achieves state-of-the-art
performance on large-scale compatibility prediction tasks, especially in cases
where there is substantial heterogeneity between related items. Qualitatively,
we demonstrate that richer notions of compatibility can be learned that go
beyond similarity, and that our model can make effective recommendations of
heterogeneous content.


title:
Maximal Sobolev regularity for solutions of elliptic equations in
  infinite dimensional Banach spaces endowed with a weighted Gaussian measure

abstract:
  Let $X$ be a separable Banach space endowed with a non-degenerate centered
Gaussian measure $\mu$. The associated Cameron-Martin space is denoted by $H$.
Let $\nu=e^{-U}\mu$, where $e^{-U}$ is a sufficiently regular weight and
$U:X\rightarrow\mathbb{R}$ is a convex and continuous function. In this paper
we are interested in the $W^{2,2}$ regularity of the weak solutions of elliptic
equations of the type \[\lambda u-L_\nu u=f,\] where $\lambda>0$, $f\in
L^2(X,\nu)$ and $L_\nu$ is the self-adjoint operator associated with the
quadratic form \[(\psi,\varphi)\mapsto
\int_X\left\langle\nabla_H\psi,\nabla_H\varphi\right\rangle_Hd\nu\qquad\psi,\varphi\in
W^{1,2}(X,\nu).\]


title:
Building up the Population III initial mass function from cosmological
  initial conditions

abstract:
  We simulate the growth of a Population III stellar system, starting from
cosmological initial conditions at z=100. We follow the formation of a minihalo
and the subsequent collapse of its central gas to high densities, resolving
scales as small as ~ 1 AU. Using sink particles to represent the growing
protostars, we model the growth of the photodissociating and ionizing region
around the first sink, continuing the simulation for ~ 5000 yr after initial
protostar formation. Along with the first-forming sink, several tens of
secondary sinks form before an ionization front develops around the most
massive star. The resulting cluster has high rates of sink formation, ejections
from the stellar disc, and sink mergers during the first ~ 2000 yr, before the
onset of radiative feedback. By this time a warm ~ 5000 K phase of neutral gas
has expanded to roughly the disc radius of 2000 AU, slowing mass flow onto the
disc and sinks. By 5000 yr the most massive star grows to 20 M_sol, while the
total stellar mass approaches 75 M_sol. Out of the ~ 40 sinks, approximately 30
are low-mass (M_* < 1 M_sol), and if the simulation had resolved smaller scales
an even greater number of sinks might have formed. Thus, protostellar radiative
feedback is insufficient to prevent rapid disc fragmentation and the formation
of a high-member Pop III cluster before an ionization front emerges. Throughout
the simulation, the majority of stellar mass is contained within the most
massive stars, further implying that the Pop III initial mass function is
top-heavy.


title:
Inverse source non-local problem for mixed type equation with Caputo
  fractional differential operator

abstract:
  In the present work, we discuss a unique solvability of an inverse-source
problem with integral transmitting condition for time-fractional mixed type
equation in a rectangular domain, where the unknown source term depends on
space variable only.
  The method of solution based on a series expansion using bi-orthogonal basis
of space corresponding to a nonself-adjoint boundary value problem. Under
certain regularity conditions on the given data, we prove the uniqueness and
existence of the solution for the given problem. Influence of transmitting
condition on the solvability of the problem is shown as well. Precisely, two
different cases were considered; a case of full integral form ($0<\gamma<1$)
and a special case ($\gamma=1$) of transmitting condition.
  In order to simplify the bulky expressions appearing in the proof of the main
result, we have established a new property of the recently introduced
Mittag-Leffler type function of two variables (see Lemma 2.1).


title: Nonlocal gravity: Conformally flat spacetimes

abstract:
  The field equations of the recent nonlocal generalization of Einstein's
theory of gravitation are presented in a form that is reminiscent of general
relativity. The implications of the nonlocal field equations are studied in the
case of conformally flat spacetimes. Even in this simple case, the field
equations are intractable. Therefore, to gain insight into the nature of these
equations, we investigate the structure of nonlocal gravity in two-dimensional
spacetimes. While any smooth 2D spacetime is conformally flat and satisfies
Einstein's field equations, only a subset containing either a Killing vector or
a homothetic Killing vector can satisfy the field equations of nonlocal
gravity.


title: Boosted one dimensional superfluids on a lattice

abstract:
  We study the effect of a boost (Fermi sea displaced by a finite momentum) on
one dimensional systems of lattice fermions with short-ranged interactions. In
the absence of a boost such systems with attractive interactions possess
algebraic superconducting order. Motivated by physics in higher dimensions, one
might naively expect a boost to weaken and ultimately destroy
superconductivity. However, we show that for one dimensional systems the effect
of the boost can be to strengthen the algebraic superconducting order by making
correlation functions fall off more slowly with distance. This phenomenon can
manifest in interesting ways, for example, a boost can produce a Luther- Emery
phase in a system with both charge and spin gaps by engendering the destruction
of the former.


title:
Application of Geometric Calculus in Numerical Analysis and Difference
  Sequence Spaces

abstract:
  The main purpose of this paper is to introduce the geometric difference
sequence space
  $l_\infty^{G} (\Delta_G)$ and prove that $l_\infty^{G} ({\Delta}_{G})$ is a
Banach space with respect to the norm $\left\|.\right\|^G_{{\Delta}_G}.$ Also
we compute the $\alpha$-dual, $\beta$-dual and $\gamma$-dual spaces. Finally we
obtain the Geometric Newton-Gregory interpolation formulae.


title: Rich families and projectional skeletons in Asplund WCG spaces

abstract:
  We show a way of constructing projectional skeletons using the concept of
rich families in Banach spaces which admit a projectional generator. Our next
result is that a Banach space $X$ is Asplund and weakly compactly generated if
and only if there exists a commutative 1-projectional skeleton $(Q_\gamma:\
\gamma\in\Gamma)$ on $X$ such that $(Q_\gamma{}^*:\ \gamma\in\Gamma)$ is a
commutative 1-projectional skeleton on $X^*$. We consider both, real and also
complex, Banach spaces.


title: A generalization of the 2D Sleipian functions

abstract:
  The main content of this work is devoted to study various explicit family of
special functions generalizing the famous 2D Sleipain functions, founded in
1960's by D. Slepian and his co-authors. As a consequence, many desirable
spectral properties of the corresponding weighted finite Fourier transform are
deduced from the rich literature. In particular, similar aspect related to
Slepian's seminal papers is the investigation of differential operators that
commute with appropriate integral operators are given. Finally, we provided the
reader with some analytic expressions for the Fourier transforms of the Disk
polynomials and the two variables Gegenbauer polynomials.


title: An overview of fine gradings on simple Lie algebras

abstract:
  This paper presents a survey of the results and ideas behind the
classification of the fine gradings, up to equivalence, on the simple finite
dimensional Lie algebras over an algebraically closed field of characteristic
zero. It provides an expanded version of the mini course delivered by the
second author at the Conference "Advances in Group Theory and Applications
AGTA-2015".


title:
Morse potential, symmetric Morse potential and bracketed bound-state
  energies

abstract:
  An upgraded concept of solvability of Schr\"{o}dinger-type equations is
proposed. In a broader methodical context of non-perturbative quantum theory
the innovation involves potentials which are piece-wise analytic yielding
differential equations solvable in terms of special functions. In our
illustrative example, Whittaker functions are employed and a single point of
non-analyticity is admitted in the origin. In a symbolic-manipulation-based
practical implementation of the method a serendipitous advantage of the
construction of bound states is found in the both-sided nature of the numerical
localization of their energies.


title: Kinetic and Exchange Energy Densities near the Nucleus

abstract:
  We investigate the behavior of the kinetic and the exchange energy densities
near the nuclear cusp of atomic systems. Considering hydrogenic orbitals, we
derive analytical expressions near the nucleus, for single shells, as well as
in the semiclassical limit of large non-relativistic neutral atoms. We show
that a model based on the helium iso-electronic series is very accurate, as
also confirmed by numerical calculations on real atoms up to two thousands
electrons. Based on this model, we propose non-local density-dependent
ingredients that are suitable for the description of the kinetic and exchange
energy densities in the region close to the nucleus. These non-local
ingredients are invariant under the uniform scaling of the density, and they
can be used in the construction of non-local exchange-correlation and kinetic
functionals.


title: Weak colored local rules for planar tilings

abstract:
  A linear subspace $E$ of $\mathbb{R}^n$ has colored local rules if there
exists a finite set of decorated tiles whose tilings are digitizations of $E$.
The local rules are weak if the digitizations can slightly wander around $E$.
We prove that a linear subspace has weak colored local rules if and only if it
is computable. This goes beyond the previous results, all based on algebraic
subspaces. We prove an analogous characterization for sets of linear subspaces,
including the set of all the linear subspaces of $\mathbb{R}^n$.


title:
Identification of noncausal Ito processes from the stochastic Fourier
  coefficients II

abstract:
  We consider the identification problem of a noncausal Ito process from its
stochastic Fourier coefficients with respect to the complete system of
trigonometric functions. Here, a noncausal Ito process is the extension of Ito
process whose diffusion and drift terms are assumed to be noncausal. If
noncausal Ito processes are defined through Skorokhod integral, then authors
obtained the affirmative answer in the previous article (Ogawa & Uemura,2014).
In this note we generalize our result. We assume both diffusion and drift terms
belong to the Watanabe space and identify the noncausal Ito process from its
stochastic Fourier coefficients in the framework of Malliavin calculus.


title: Rectangular Schroder Parking Functions Combinatorics

abstract:
  We study Schroder paths drawn in a (m,n) rectangle, for any positive integers
m and n. We get explicit enumeration formulas, closely linked to those for the
corresponding (m,n)-Dyck paths. Moreover we study a Schroder version of
(m,n)-parking functions, and associated (q,t)-analogs.


title: Building the Signature of Set Theory Using the MathSem Program

abstract:
  Knowledge representation is a popular research field in IT. As mathematical
knowledge is most formalized, its representation is important and interesting.
Mathematical knowledge consists of various mathematical theories. In this paper
we consider a deductive system that derives mathematical notions, axioms and
theorems. All these notions, axioms and theorems can be considered as the part
of elementary set theory. This theory will be represented as a semantic net.


title: Heterogeneous Ramsey Algebras and Classification of Ramsey Vector Spaces

abstract:
  Carlson introduced the notion of a Ramsey space as a generalization to the
Ellentuck space. When a Ramsey space is induced by an algebra, Carlson
suggested a study of its purely combinatorial version now called Ramsey
algebra. Some basic results for homogeneous algebras have been obtained. In
this paper, we introduce the notion of a Ramsey algebra for heterogeneous
algebras and derive some basic results. Then, we study the Ramsey-algebraic
properties of vector spaces.


title: Stochastic Dynamic Cache Partitioning for Encrypted Content Delivery

abstract:
  In-network caching is an appealing solution to cope with the increasing
bandwidth demand of video, audio and data transfer over the Internet.
Nonetheless, an increasing share of content delivery services adopt encryption
through HTTPS, which is not compatible with traditional ISP-managed approaches
like transparent and proxy caching. This raises the need for solutions
involving both Internet Service Providers (ISP) and Content Providers (CP): by
design, the solution should preserve business-critical CP information (e.g.,
content popularity, user preferences) on the one hand, while allowing for a
deeper integration of caches in the ISP architecture (e.g., in 5G femto-cells)
on the other hand.
  In this paper we address this issue by considering a content-oblivious
ISP-operated cache. The ISP allocates the cache storage to various content
providers so as to maximize the bandwidth savings provided by the cache: the
main novelty lies in the fact that, to protect business-critical information,
ISPs only need to measure the aggregated miss rates of the individual CPs and
do not need to be aware of the objects that are requested, as in classic
caching. We propose a cache allocation algorithm based on a perturbed
stochastic subgradient method, and prove that the algorithm converges close to
the allocation that maximizes the overall cache hit rate. We use extensive
simulations to validate the algorithm and to assess its convergence rate under
stationary and non-stationary content popularity. Our results (i) testify the
feasibility of content-oblivious caches and (ii) show that the proposed
algorithm can achieve within 10\% from the global optimum in our evaluation.


title:
On the properties of the Lambda value at risk: robustness, elicitability
  and consistency

abstract:
  Recently, financial industry and regulators have enhanced the debate on the
good properties of a risk measure. A fundamental issue is the evaluation of the
quality of a risk estimation. On the one hand, a backtesting procedure is
desirable for assessing the accuracy of such an estimation and this can be
naturally achieved by elicitable risk measures. For the same objective, an
alternative approach has been introduced by Davis (2016) through the so-called
consistency property. On the other hand, a risk estimation should be less
sensitive with respect to small changes in the available data set and exhibit
qualitative robustness. A new risk measure, the Lambda value at risk (Lambda
VaR), has been recently proposed by Frittelli et al. (2014), as a
generalization of VaR with the ability to discriminate the risk among P&L
distributions with different tail behaviour. In this article, we show that
Lambda VaR also satisfies the properties of robustness, elicitability and
consistency under some conditions.


title:
Frame-based Approach for Sparse Representation of Signal Decomposition
  and Reconstruction

abstract:
  Frame is the corner stone for designing decomposition and reconstruction
operations in signal processing. Famous frames include wavelets, curvelets,and
Gabor. A celebrated result indicates that if a synthesis frame is chosen for
reconstruction, then its canonical dual frame is the analysis frame that
performs decomposition, yielding coefficients that minimizes l2-norm of all
coefficients of all dual frames. This paper tries to extend this result by
inves-tigating whether a dual frame can be constructed so that the
corresponding coefficients yield the minimum l1-norm. We show that this mission
cannot be achieved for any over-complete frame. However, we present some
conditions on a dual frame so that the minimizer of the l1-norm can be derived
from the coefficients of the dual frame. We show that, based on frame
structure, various applications that seek to optimize sparse analysis and
synthesis co-efficients are logically equivalent. Finally, we present a general
construction method of frames to demonstrate the proposed conditions are
feasible. In addition, two design approaches are proposed to derive frames that
meet the proposed conditions and yield small non-zero elements of frame
coefficients.


title:
Numerical optimization of writer and media for bit patterned magnetic
  recording

abstract:
  In this work we present a micromagnetic study of the performance potential of
bit-patterned (BP) magnetic recording media via joint optimization of the
design of the media and of the magnetic write heads. Because the design space
is large and complex, we developed a novel computational framework suitable for
parallel implementation on compute clusters. Our technique combines advanced
global optimization algorithms and finite-element micromagnetic solvers.
Targeting data bit densities of $4\mathrm{Tb}/\mathrm{in}^2$, we optimize
designs for centered, staggered, and shingled BP writing. The magnetization
dynamics of the switching of the exchange-coupled composite BP islands of the
media is treated micromagnetically. Our simulation framework takes into account
not only the dynamics of on-track errors but also of the thermally induced
adjacent-track erasure. With co-optimized write heads, the results show
superior performance of shingled BP magnetic recording where we identify two
particular designs achieving write bit-error rates of $1.5\mathrm{x}10^{-8}$
and $8.4\mathrm{x}10^{-8}$, respectively. A detailed description of the key
design features of these designs is provided and contrasted with centered and
staggered BP designs which yielded write bit error rates of only
$2.8\mathrm{x}10^{-3}$ (centered design) and $1.7\mathrm{x}10^{-2}$ (staggered
design) even under optimized conditions.


title: R\'enyi, Shannon and Tsallis entropies of Rydberg hydrogenic systems

abstract:
  The R\'enyi entropies $R_{p}[\rho], 0<p<\infty$ of the probability density
$\rho_{n,l,m}(\vec{r})$ of a physical system completely characterize the
chemical and physical properties of the quantum state described by the three
integer quantum numbers $(n,l,m)$. The analytical determination of these
quantities is practically impossible up until now, even for the very few
systems where their Schr\"odinger equation is exactly solved. In this work, the
R\'enyi entropies of Rydberg (highly-excited) hydrogenic states are explicitly
calculated in terms of the quantum numbers and the parameter $p$. To do that we
use a methodology which first connects these quantities to the
$\mathcal{L}_{p}$-norms $N_{n,l}(p)$ of the Laguerre polynomials which
characterize the state's wavefunction. Then, the R\'enyi, Shannon and Tsallis
entropies of the Rydberg states are determined by calculating the asymptotics
($n\rightarrow\infty$) of these Laguerre norms. Finally, these quantities are
numerically examined in terms of the quantum numbers and the nuclear charge.


title: Reactive Policies with Planning for Action Languages

abstract:
  We describe a representation in a high-level transition system for policies
that express a reactive behavior for the agent. We consider a target decision
component that figures out what to do next and an (online) planning capability
to compute the plans needed to reach these targets. Our representation allows
one to analyze the flow of executing the given reactive policy, and to
determine whether it works as expected. Additionally, the flexibility of the
representation opens a range of possibilities for designing behaviors.


title: Astrology in the Era of Exoplanets

abstract:
  The last two decades have seen the number of known exoplanets increase from a
small handful to nearly 2000 known exoplanets, thousands more planet
candidates, and several upcoming missions that are expected to further increase
the population of known exoplanets. Beyond the strictly scientific questions
that this has led to regarding planet formation and frequency, this has also
led to broader questions such as the philosophical implications of life
elsewhere in the universe and the future of human civilization and space
exploration. One additional realm that hasn't been adequately considered,
however, is that this large increase in exoplanets would also impact claims
regarding astrology. In this paper we look at the distribution of planets
across the sky and along the Ecliptic, as well as the current and future
implications of this planet distribution.


title: Generalized Geometric Difference Sequence Spaces and its duals

abstract:
  Objective of this paper is to introduce the generalized geometric difference
sequence spaces
  $l_\infty^{G}(\Delta^m_G), c^G(\Delta^m_G), c_0^{G}(\Delta^m_G)$ and to prove
that these are Banach spaces. Then we prove some inclusion properties. Also we
compute their dual spaces.


title: The tangential velocity of M31: CLUES from constrained simulations

abstract:
  Determining the precise value of the tangential component of the velocity of
M31 is a non trivial astrophysical issue, that relies on complicated modeling.
This has recently lead to con- flicting estimates, obtained by several groups
that used different methodologies and assump- tions. This letter addresses the
issue by computing a Bayesian posterior distribution function of this quantity,
in order to measure the compatibility of those estimates with LambdaCDM. This
is achieved using an ensemble of local group (LG) look-alikes collected from a
set of Con- strained Simulations (CSs) of the local Universe, and a standard
unconstrained LambdaCDM. The latter allows us to build a control sample of
LG-like pairs and to single out the influence of the environment in our
results. We find that neither estimate is at odds with LambdaCDM; how- ever,
whereas CSs favour higher values of vtan , the reverse is true for estimates
based on LG samples gathered from unconstrained simulations, overlooking the
environmental element


title:
Classicality in Quantum Mechanics: model for pointer states and
  decoherence

abstract:
  We have studied the emergence of classical states in the perturbative
interaction model. The states which interact with many other degrees of
freedom, such as the center of mass of a macro-object, play important role.
Although the random phase mechanism is effective as same as Zurek's strong
correlation model, there are enormous states, each of which independently
developes due to the orthogonality of the environmental states. In these
privileged states, the subsystem picture with the separability is stable.


title: Steering optical comb frequency by rotating polarization state

abstract:
  Optical frequency combs, with precise control of repetition rate and
carrier-envelope-offset frequency, have revolutionized many fields, such as
fine optical spectroscopy, optical frequency standards, ultra-fast science
research, ultra-stable microwave generation and precise ranging measurement.
However, existing high bandwidth frequency control methods have small dynamic
range, requiring complex hybrid control techniques. To overcome this
limitation, we develop a new approach, where a home-made intra-cavity
electro-optic modulator tunes polarization state of laser signal rather than
only optical length of the cavity, to steer frequencies of a
nonlinear-polarization-rotation mode-locked laser. By taking advantage of
birefringence of the whole cavity, this approach results in not only broadband
but also relative large-dynamic frequency control. Experimental results show
that frequency control dynamic range increase at least one order in comparison
with the traditional intra-cavity electro-optic modulator technique. In
additional, this technique exhibits less side-effect than traditional frequency
control methods.


title:
Null boundary controllability of a one-dimensional heat equation with an
  internal point mass and variable coefficients

abstract:
  In this paper we consider a linear hybrid system which composed by two
non-homogeneous rods connected by a point mass and generated by the
equation\bea\left\{
  \begin{array}{ll}
  \rho_{1}(x)u_{t}=(\sigma_{1}(x)u_{x})_{x}-q_{1}(x)u,& x\in(-1,0),~t>0,
  \rho_{2}(x)v_{t}=(\sigma_{2}(x)v_{x})_{x}-q_{2}(x)v,& x\in(0,1), ~~~t>0,
  M z_{t}(t)=\sigma_{2}(0)v_{x}(0,t)-\sigma_{1}(0)u_{x}(0,t), &t>0, \end{array}
  \right. \eea with Dirichlet boundary condition on the left end $x=-1$ and a
boundary control acts on the right end $x=1$. We prove that this system is null
controllable with Dirichlet or Neumann boundary controls. Our approach is
mainly based on a detailed spectral analysis together with the moment method.
In particular, we show that the associated spectral gap in both cases
(Dirichlet or Neumann boundary controls) are positive without further
conditions on the coefficients $\rho_{i}$, $\sigma_{i}$ and $q_{i}$ $(i=1,2)$
other than the regularities.


title: Verifiability of Argumentation Semantics

abstract:
  Dung's abstract argumentation theory is a widely used formalism to model
conflicting information and to draw conclusions in such situations. Hereby, the
knowledge is represented by so-called argumentation frameworks (AFs) and the
reasoning is done via semantics extracting acceptable sets. All reasonable
semantics are based on the notion of conflict-freeness which means that
arguments are only jointly acceptable when they are not linked within the AF.
In this paper, we study the question which information on top of conflict-free
sets is needed to compute extensions of a semantics at hand. We introduce a
hierarchy of so-called verification classes specifying the required amount of
information. We show that well-known standard semantics are exactly verifiable
through a certain such class. Our framework also gives a means to study
semantics lying inbetween known semantics, thus contributing to a more abstract
understanding of the different features argumentation semantics offer.


title:
On a property of $t$-structures generated by non-classical tilting
  modules

abstract:
  Let $R$ be a ring and $T \in {\rm Mod-}R$ be a (non-classical) tilting module
of finite projective dimension. Let $\mathcal T=({\mathcal T}^{\leq0},
{\mathcal T}^{\geq0})$ be the $t$-structure on $D(R)$ generated by $T$ and
${\mathcal D}=({\mathcal D}^{\leq0}, {\mathcal D}^{\geq0})$ be the natural
$t$-structure. We show that the pair $(\mathcal D, \mathcal T)$ is right
filterable in the sense of [FMT14], that is, for any $i\in\mathbb Z$ the
intersection ${\mathcal D}^{\geq i}\cap {\mathcal T}^{\geq 0}$ is the co-aisle
of a $t$-structure. As a consequence, the heart of $\mathcal T$ is derived
equivalent to ${\rm Mod-}R$.


title:
Development of Muon Drift-Tube Detectors for High-Luminosity Upgrades of
  the Large Hadron Collider

abstract:
  The muon detectors of the experiments at the Large Hadron Collider (LHC) have
to cope with unprecedentedly high neutron and gamma ray background rates. In
the forward regions of the muon spectrometer of the ATLAS detector, for
instance, counting rates of 1.7 kHz/square cm are reached at the LHC design
luminosity. For high-luminosity upgrades of the LHC, up to 10 times higher
background rates are expected which require replacement of the muon chambers in
the critical detector regions. Tests at the CERN Gamma Irradiation Facility
showed that drift-tube detectors with 15 mm diameter aluminum tubes operated
with Ar:CO2 (93:7) gas at 3 bar and a maximum drift time of about 200 ns
provide efficient and high-resolution muon tracking up to the highest expected
rates. For 15 mm tube diameter, space charge effects deteriorating the spatial
resolution at high rates are strongly suppressed. The sense wires have to be
positioned in the chamber with an accuracy of better than 50 ?micons in order
to achieve the desired spatial resolution of a chamber of 50 ?microns up to the
highest rates. We report about the design, construction and test of prototype
detectors which fulfill these requirements.


title: The one loop corrections to the neutrino masses in BLMSSM

abstract:
  The neutrino masses and mixings are studied in the model which is the
supersymmetric extension of the standard model with local gauged baryon and
lepton numbers(BLMSSM). At tree level the neutrinos can obtain tiny masses
through the See-Saw mechanism in the BLMSSM. The one-loop corrections to the
neutrino masses and mixings are important, and they are studied in this work
with the mass insertion approximation. We study the numerical results and
discuss the allowed parameter space of BLMSSM. It can contribute to study the
neutrino masses and to explore the new physics beyond the standard model(SM).


title: Hot Jupiters and Super-Earths

abstract:
  We explore the role of dynamics in shaping planetary system multiplicities,
focussing on two particular problems. (1) We propose that the lack of close-in
super-Earths in hot Jupiter systems is a signature of the migration history of
the hot Jupiters and helps to discriminate between different mechanisms of
migration. We present N-body simulations of dynamical migration scenarios where
proto-hot Jupiters are excited to high eccentricities prior to tidal
circularisation and orbital decay. We show that in this scenario, the eccentric
giant planet typically destroys planets in the inner system, in agreement with
the observed lack of close super-Earth companions to hot Jupiters. (2) We
explore the role of the dynamics of outer systems in affecting the
multiplicities of close-in systems such as those discovered by Kepler. We
consider specifically the effects of planet--planet scattering and Kozai
perturbations on an exterior giant planet on the architecture of the inner
system, and evaluate the ability of such scenarios to reduce the inner system's
multiplicity and contribute to the observed excess of single Kepler planets.


title: Dynamics of fermions in an amplitude modulated lattice

abstract:
  We study dynamics of fermions loaded in an optical lattice with a
superimposed parabolic trap potential. In the recent Hamburg experiments
[J.Heinze et.al., Phys. Rev. Lett. 110, 085302 (2013)] on quantum simulation of
photoconductivity, a modulation pulse on the optical lattice transferred part
of the population of the lowest band to an excited band, leaving a hole in the
particle distribution of the lowest band. Subsequent intricate dynamics of both
excited particles and holes can be explained by a semiclassical approach based
on the evolution of Wigner function. Here we provide a more detailed analysis
of the dynamics taking into account the dimensionality of the system and finite
temperature effects, aiming at reproducing experimental results on longer
timescales. A semiclassical wave packet is constructed more accurately than in
the previous theory. As a result, semiclassical dynamics indeed reproduces
experimental data and full quantum numerical calculations with much better
accuracy. In particular, fascinating phenomenon of collapse and revival of
holes is investigated in a more detail. We presume the experimental setup can
be used for deeper exploration of nonlinear waves in fermionic gases.


title:
Performance of Drift-Tube Detectors at High Counting Rates for
  High-Luminosity LHC Upgrades

abstract:
  The performance of pressurized drift-tube detectors at very high background
rates has been studied at the Gamma Irradiation Facility (GIF) at CERN and in
an intense 20 MeV proton beam at the Munich Van-der-Graaf tandem accelerator
for applications in large-area precision muon tracking at high-luminosity
upgrades of the Large Hadron Collider (LHC). The ATLAS muon drifttube (MDT)
chambers with 30 mm tube diameter have been designed to cope with and neutron
background hit rates of up to 500 Hz/square cm. Background rates of up to 14
kHz/square cm are expected at LHC upgrades. The test results with standard MDT
readout electronics show that the reduction of the drift-tube diameter to 15
mm, while leaving the operating parameters unchanged, vastly increases the rate
capability well beyond the requirements. The development of new small-diameter
muon drift-tube (sMDT) chambers for LHC upgrades is completed. Further
improvements of tracking efficiency and spatial resolution at high counting
rates will be achieved with upgraded readout electronics employing improved
signal shaping for high counting rates.


title: Learning Multiscale Features Directly From Waveforms

abstract:
  Deep learning has dramatically improved the performance of speech recognition
systems through learning hierarchies of features optimized for the task at
hand. However, true end-to-end learning, where features are learned directly
from waveforms, has only recently reached the performance of hand-tailored
representations based on the Fourier transform. In this paper, we detail an
approach to use convolutional filters to push past the inherent tradeoff of
temporal and frequency resolution that exists for spectral representations. At
increased computational cost, we show that increasing temporal resolution via
reduced stride and increasing frequency resolution via additional filters
delivers significant performance improvements. Further, we find more efficient
representations by simultaneously learning at multiple scales, leading to an
overall decrease in word error rate on a difficult internal speech test set by
20.7% relative to networks with the same number of parameters trained on
spectrograms.


title: Haar meager sets, their hulls, and relationship to compact sets

abstract:
  Let $G$ be an abelian Polish group. We show that there is a strongly Haar
meager set in $G$ without any $F_{\sigma}$ Haar meager hull (and that this
still remains true if we replace $F_{\sigma}$ by any other class of the Borel
hierarchy). We also prove that there is a coanalytic naively strongly Haar
meager set without any Haar meager hull. Further, we investigate the
relationship of the collection of all compact sets to the collection of all
Haar meager sets in non-locally compact Polish groups.


title: Distributing Knowledge into Simple Bases

abstract:
  Understanding the behavior of belief change operators for fragments of
classical logic has received increasing interest over the last years. Results
in this direction are mainly concerned with adapting representation theorems.
However, fragment-driven belief change also leads to novel research questions.
In this paper we propose the concept of belief distribution, which can be
understood as the reverse task of merging. More specifically, we are interested
in the following question: given an arbitrary knowledge base $K$ and some
merging operator $\Delta$, can we find a profile $E$ and a constraint $\mu$,
both from a given fragment of classical logic, such that $\Delta_\mu(E)$ yields
a result equivalent to $K$? In other words, we are interested in seeing if $K$
can be distributed into knowledge bases of simpler structure, such that the
task of merging allows for a reconstruction of the original knowledge. Our
initial results show that merging based on drastic distance allows for an easy
distribution of knowledge, while the power of distribution for operators based
on Hamming distance relies heavily on the fragment of choice.


title: Water ice at the surface of HD 100546 disk

abstract:
  We made near infrared multicolor imaging observations of a disk around Herbig
Be star HD100546 using Gemini/NICI. K (2.2\,$\mu$m), H$_2$O ice (3.06\,$\mu$m),
and L'(3.8\,$\mu$m) disk images were obtained and we found the 3.1\,$\mu$m
absorption feature in the scattered light spectrum, likely due to water ice
grains at the disk surface. We compared the observed depth of the ice
absorption feature with the disk model based on \cite{Oka2012} including water
ice photodesorption effect by stellar UV photons. The observed absorption depth
can be explained by the both disk models with/without photodesorption effect
within the measurement accuracy, but slightly favors the model with
photodesorption effects, implying that the UV photons play an important role on
the survival/destruction of ice grains at the Herbig Ae/Be disk surface.
Further improvement on the accuracy of the observations of the water ice
absorption depth is needed to constrain the disk models.


title: Uncertainty principles for the Clifford-Fourier transform

abstract:
  In this paper, we estabish an analogue of Hardy's theorem and Miyachi's
theorem for the Clifford-Fourier transform.


title:
Collective modes of a one-dimensional trapped Bose gas in the presence
  of the anomalous density

abstract:
  We study the collective modes of a one-dimensional harmonically trapped
Bose-Einstein condensate in the presence of the anomalous density using the
time-dependent Hartree-Fock-Bogoliubov theory. Within the hydrodynamic
equations, we derive analytical expressions for the mode frequencies and the
density fluctuations of the anomalous density which constitutes the minority
component at very low temperature and feels an effective external potential
exerted by the majority component, i.e., the condensate. On the other hand, we
numerically examine the temperature dependence of the breathing mode
oscillations of the condensate at finite temperature in the weak-coupling
regime. At zero temperature, we compare our predictions with available
experimental data, theoretical treatments, and Monte carlo simulations in all
interaction regimes and the remaining hindrances are emphasized. We show that
the anomalous correlations have a non-negligible role on the collective modes
at both zero and finite temperatures.


title: Analytical study of chaos and applications

abstract:
  We summarize various cases where chaotic orbits can be described
analytically. First we consider the case of a magnetic bottle where we have
non-resonant and resonant ordered and chaotic orbits. In the sequence we
consider the hyperbolic Henon map, where chaos appears mainly around the
origin, which is an unstable periodic orbit. In this case the chaotic orbits
around the origin are represented by analytic series (Moser series). We find
the domain of convergence of these Moser series and of similar series around
other unstable periodic orbits. The asymptotic manifolds from the various
unstable periodic orbits intersect at homoclinic and heteroclinic orbits that
are given analytically. Then we consider some Hamiltonian systems and we find
their homoclinic orbits by using a new method of analytic prolongation. An
application of astronomical interest is the domain of convergence of the
analytical series that determine the spiral structure of barred-spiral
galaxies.


title:
Development of Fast High-Resolution Muon Drift-Tube Detectors for High
  Counting Rates

abstract:
  Pressurized drift-tube chambers are efficient detectors for high-precision
tracking over large areas. The Monitored Drift-Tube (MDT) chambers of the muon
spectrometer of the ATLAS detector at the Large Hadron Collider (LHC) reach a
spatial resolution of 35 micons and almost 100% tracking efficiency with 6
layers of 30 mm diameter drift tubes operated with Ar:CO2 (93:7) gas mixture at
3 bar and a gas gain of 20000. The ATLAS MDT chambers are designed to cope with
background counting rates due to neutrons and gamma-rays of up to about 300 kHz
per tube which will be exceeded for LHC luminosities larger than the design
value of 10-34 per square cm and second. Decreasing the drift-tube diameter to
15 mm while keeping the other parameters, including the gas gain, unchanged
reduces the maximum drift time from about 700 ns to 200 ns and the drift-tube
occupancy by a factor of 7. New drift-tube chambers for the endcap regions of
the ATLAS muon spectrometer have been designed. A prototype chamber consisting
of 12 times 8 layers of 15 mm diameter drift tubes of 1 m length has been
constructed with a sense wire positioning accuracy of 20 microns. The 15 mm
diameter drift-tubes have been tested with cosmic rays in the Gamma Irradiation
Facility at CERN at counting rates of up to 1.85 MHz.