title:
Direct Photon Elliptic Flow at BNL Relativistic Heavy Ion Collider
  (RHIC) and CERN Large Hadron Collider (LHC)

abstract:
  We use an event-by-event hydrodynamical description of the heavy-ion
collision process with Glauber initial conditions to calculate the thermal
emission of photons. The photon rates in the hadronic phase follow from a
spectral function approach and a density expansion, while in the partonic phase
they follow from the AMY perturbative rates. The calculated photon elliptic
flows are lower than those reported recently by both the ALICE and PHENIX
collaborations.


title: A model of infant speech perception and learning

abstract:
  Infant speech perception and learning is modeled using Echo State Network
classification and Reinforcement Learning. Ambient speech for the modeled
infant learner is created using the speech synthesizer Vocaltractlab. An
auditory system is trained to recognize vowel sounds from a series of speakers
of different anatomies in Vocaltractlab. Having formed perceptual targets, the
infant uses Reinforcement Learning to imitate his ambient speech. A possible
way of bridging the problem of speaker normalisation is proposed, using direct
imitation but also including a caregiver who listens to the infants sounds and
imitates those that sound vowel-like.


title:
Density-dependent clustering: I. Pulling back the curtains on motions of
  the BAO peak

abstract:
  The most common statistic used to analyze large-scale structure surveys is
the correlation function, or power spectrum. Here, we show how `slicing' the
correlation function on local density brings sensitivity to interesting
non-Gaussian features in the large-scale structure, such as the expansion or
contraction of baryon acoustic oscillations (BAO) according to the local
density. The sliced correlation function measures the large-scale flows that
smear out the BAO, instead of just correcting them as reconstruction algorithms
do. Thus, we expect the sliced correlation function to be useful in
constraining the growth factor, and modified gravity theories that involve the
local density. Out of the studied cases, we find that the run of the BAO peak
location with density is best revealed when slicing on a $\sim 40$ Mpc/$h$
filtered density. But slicing on a $\sim100$ Mpc/$h$ filtered density may be
most useful in distinguishing between underdense and overdense regions, whose
BAO peaks are separated by a substantial $\sim 5$ Mpc/$h$ at $z=0$. We also
introduce `curtain plots' showing how local densities drive particle motions
toward or away from each other over the course of an $N$-body simulation.


title:
A Versatile Technique to Enable sub-milli-Kelvin Instrument Stability
  for Precise Radial Velocity Measurements: Tests with the Habitable-zone
  Planet Finder

abstract:
  Insufficient instrument thermo-mechanical stability is one of the many
roadblocks for achieving 10cm/s Doppler radial velocity (RV) precision, the
precision needed to detect Earth-twins orbiting Solar-type stars. Highly
temperature and pressure stabilized spectrographs allow us to better calibrate
out instrumental drifts, thereby helping in distinguishing instrumental noise
from astrophysical stellar signals. We present the design and performance of
the Environmental Control System (ECS) for the Habitable-zone Planet Finder
(HPF), a high-resolution (R=50,000) fiber-fed near infrared (NIR) spectrograph
for the 10m Hobby Eberly Telescope at McDonald Observatory. HPF will operate at
180K, driven by the choice of an H2RG NIR detector array with a 1.7micron
cutoff. This ECS has demonstrated 0.6mK RMS stability over 15 days at both 180K
and 300K, and maintained high quality vacuum (<$10^{-7}$Torr) over months,
during long-term stability tests conducted without a planned passive thermal
enclosure surrounding the vacuum chamber. This control scheme is versatile and
can be applied as a blueprint to stabilize future NIR and optical high
precision Doppler instruments over a wide temperature range from ~77K to
elevated room temperatures. A similar ECS is being implemented to stabilize
NEID, the NASA/NSF NN-EXPLORE spectrograph for the 3.5m WIYN telescope at Kitt
Peak, operating at 300K. A full SolidWorks 3D-CAD model and a comprehensive
parts list of the HPF ECS are included with this manuscript to facilitate the
adaptation of this versatile environmental control scheme in the broader
astronomical community.


title: Generalized K-Shift Forbidden Substrings in Permutations

abstract:
  In this note we continue the analysis of permutations that avoid substrings
j(j+k), 1 <= j <= n-k, k < n, as well as substrings j(j+k) (mod n), 1 <= j <=
n. In the first case the number of such permutations can be obtained from
recursions starting from derangement numbers, while in the (mod n) case the
number of permutations depends on whether n is prime, and more generally, on
whether n and k are relatively prime.


title:
Dynamical Behavior Investigation and Analysis of Novel Mechanism for
  Simulated Spherical Robot named "RollRoller"

abstract:
  This paper introduces a simulation study of fluid actuated multi-driven
closed system as spherical mobile robot called "RollRoller". Robot's mechanism
design consists of two essential parts: tubes to lead a core and mechanical
controlling parts to correspond movements. Our robot gets its motivation force
by displacing the spherical movable mass known as core in curvy manners inside
certain pipes. This simulation investigates by explaining the mechanical and
structural features of the robot for creating hydraulic-base actuation via
force and momentum analysis. Next, we categorize difficult and integrated 2D
motions to omit unstable equilibrium points through derived nonlinear dynamics.
We propose an algorithmic position control in forward direction that creates
hybrid model as solution for motion planning problem in spherical robot. By
deriving nonlinear dynamics of the spherical robot and implementing designed
motion planning, we show how RollRoller can be efficient in high speed
movements in comparison to the other pendulum-driven models. Then, we validate
the results of this position control obtained by nonlinear dynamics via
Adams/view simulation which uses the imported solid model of RollRoller.
Lastly, We have a look to the circular maneuver of this robot by the same
simulator.


title:
Wave-particle Interactions in a Resonant System of Photons and
  Ion-solvated Water

abstract:
  We investigate a laser model for a resonant system of photons and ion
cluster-solvated rotating water molecules in which ions in the cluster are
identical and have very low, non-relativistic velocities and direction of
motion parallel to a static electric field induced in a single direction. This
model combines Dicke superradiation with wave-particle interaction. As the
result, we find that the equations of motion of the system are expressed in
terms of a conventional free electron laser system. This result leads to a
mechanism for dynamical coherence, induced by collective instability in the
wave-particle interaction.


title:
On the recent seismic activity at Ioannina (Greece): Pre-earthquake
  electromagnetic emissions with critical and tricritical behavior

abstract:
  In this short paper we report that the dynamics of the earthquake (EQ)
preparation processes, as embedded in the observed fracture-induced
electromagnetic emissions (EME), were characterized by critical and then
tricritical behavior a few days before the occurrence of the recent Ioannina
(Greece) earthquake [($39.79^o N, 20.69^o E$), 15 October 2016, $M_L=5.3$].
Specifically, an excerpt of the MHz EME recorded by our remote telemetric
station near the city of Ioannina five days before the EQ was found to possess
critical characteristics, followed by an excerpt possessing tricritical
characteristics. The analysis was performed by means of the method of critical
fluctuations (MCF) revealing critical.


title: Confinement from Center Vortices: A review of old and new results

abstract:
  I briefly review the numerical evidence, some old and some quite recent, in
favor of the center vortex theory of confinement.


title: Arc-transitive digraphs with quasiprimitive local actions

abstract:
  Let $\Gamma$ be a finite $G$-vertex-transitive digraph. The in-local action
of $(\Gamma,G)$ is the permutation group $L_-$ induced by the vertex-stabiliser
on the set of in-neighbours of $v$. The out-local action $L_+$ is defined
analogously. Note that $L_-$ and $L_+$ may not be isomorphic. We thus consider
the problem of determining which pairs $(L_-,L_+)$ are possible. We prove some
general results, but pay special attention to the case when $L_-$ and $L_+$ are
both quasiprimitive. (Recall that a permutation group is quasiprimitive if each
of its nontrivial normal subgroups is transitive.) Along the way, we prove a
structural result about pairs of finite quasiprimitive groups of the same
degree, one being (abstractly) isomorphic to a proper quotient of the other.


title:
Constraints on the Early Terrestrial Surface UV Environment Relevant to
  Prebiotic Chemistry

abstract:
  The UV environment is a key boundary condition for the origin of life.
However, considerable uncertainty exists as to planetary conditions and hence
surface UV at abiogenesis. Here, we present two-stream multi-layer clear-sky
calculations of the UV surface radiance on Earth at 3.9 Ga to constrain the UV
surface fluence as a function of albedo, solar zenith angle (SZA), and
atmospheric composition. Variation in albedo and latitude (through SZA) can
affect maximum photoreaction rates by a factor of >10.4; for the same
atmosphere, photoreactions can proceed an order of magnitude faster at the
equator of a snowball Earth than at the poles of a warmer world. Surface
conditions are important considerations when computing prebiotic UV fluences.
For climatically reasonable levels of CO2, fluence shortward of 189 nm is
screened out, meaning that prebiotic chemistry is robustly shielded from
variations in UV fluence due to solar flares or variability. Strong shielding
from CO2 also means that the UV surface fluence is insensitive to plausible
levels of CH4, O2, and O3. At scattering wavelengths, UV fluence drops off
comparatively slowly with increasing CO2 levels. However, if SO2 and/or H2S can
build up to the 1-100 ppm level as hypothesized by some workers, then they can
dramatically suppress surface fluence and hence prebiotic photoprocesses. H2O
is a robust UV shield for <198 nm. This means that regardless of the levels of
other atmospheric gases, fluence <198 nm is only available for cold, dry
atmospheres, meaning sources with emission <198 nm (e.g. ArF eximer lasers) can
only be used in simulations of cold environments with low abundance of
volcanogenic gases. On the other hand, fluence at 254 nm is unshielded by H2O
and is available across a broad range of CO2 columns, meaning that mercury
lamps are suitable for initial studies regardless of the uncertainty in
primordial H2O and CO2 levels.


title:
Quantum-mechanical calculations of cross sections for electron
  collisions with atoms and molecules

abstract:
  An overview of quantum-mechanical methods to generate cross-section data for
electron collisions with atoms and molecules is presented. Particular emphasis
is placed on the time-independent close-coupling approach, since it is
particularly suitable for low-energy collisions and also allows for systematic
improvements as well as uncertainty estimates. The basic ideas are illustrated
with examples for electron collisions with argon atoms and methane. For many
atomic systems, such as e-Ar collisions, highly reliable cross sections can now
be computed with quantified uncertainties. On the other hand, while electron
collision calculations with molecules do provide key input data for plasma
models, the methods and computer codes presently used require further
development to make these inputs robust.


title: Relaxation of a Simulated Lipid Bilayer Vesicle Compressed by an AFM

abstract:
  Using Coarse-Grained Molecular Dynamics simulations, we study the relaxation
of bilayer vesicles, uniaxially compressed by an Atomic Force Microscope (AFM)
cantilever. The relaxation time exhibits a strong force-dependence.
Force-compression curves are very similar to recent experiments wherein giant
unilamellar vesicles were compressed in a nearly identical manner.


title: At the Frontier of Precision QCD in the LHC Era

abstract:
  This thesis discusses recent advances in precision calculations of quantum
chromodynamics and their application to the Large Hadron Collider (LHC) physics
program and beyond.


title: Cross-Lingual Syntactic Transfer with Limited Resources

abstract:
  We describe a simple but effective method for cross-lingual syntactic
transfer of dependency parsers, in the scenario where a large amount of
translation data is not available. The method makes use of three steps: 1) a
method for deriving cross-lingual word clusters, which can then be used in a
multilingual parser; 2) a method for transferring lexical information from a
target language to source language treebanks; 3) a method for integrating these
steps with the density-driven annotation projection method of Rasooli and
Collins (2015). Experiments show improvements over the state-of-the-art in
several languages used in previous work, in a setting where the only source of
translation data is the Bible, a considerably smaller corpus than the Europarl
corpus used in previous work. Results using the Europarl corpus as a source of
translation data show additional improvements over the results of Rasooli and
Collins (2015). We conclude with results on 38 datasets from the Universal
Dependencies corpora.


title:
Observation of a non-Abelian Yang Monopole: From New Chern Numbers to a
  Topological Transition

abstract:
  Because global topological properties are robust against local perturbations,
understanding and manipulating the topological properties of physical systems
is essential in advancing quantum science and technology. For quantum
computation, topologically protected qubit operations can increase
computational robustness, and for metrology the quantized Hall effect directly
defines the von Klitzing constant. Fundamentally, topological order is
generated by singularities called topological defects in extended spaces, and
is quantified in terms of Chern numbers, each of which measures different sorts
of fields traversing surfaces enclosing these topological singularities. Here,
inspired by high energy theories, we describe our synthesis and
characterization of a singularity present in non-Abelian gauge theories - a
Yang monopole - using atomic Bose-Einstein condensates in a five-dimensional
space, and quantify the monopole in terms of Chern numbers measured on
enclosing manifolds. While the well-known 1st Chern number vanished, the 2nd
Chern number, measured for the first time in any physical settings, did not. By
displacing the manifold, we then observed a phase transition from "topological"
to "trivial" as the monopole left the manifold.


title: The DRAT format and DRAT-trim checker

abstract:
  This document describes the DRAT format for clausal proofs and the DRAT-trim
proof checker.


title: Tetrahedral Order in Liquid Crystals

abstract:
  We review the impact of tetrahedral order on the macroscopic dynamics of
bent-core liquid crystals. We discuss tetrahedral order comparing with other
types of orientational order, like nematic, polar nematic, polar smectic, and
active polar order. In particular, we present hydrodynamic equations for
phases, where only tetrahedral order exists or tetrahedral order is combined
with nematic order. Among the latter we discriminate between three cases, where
the nematic director (a) orients along a 4-fold, or (b) along a 3-fold symmetry
axis of the tetrahedral structure. For the optically isotropic T_d phase, which
only has tetrahedral order, we focus on the coupling of flow with e.g.
temperature gradients and on the specific orientation behavior in external
electric fields. For the transition to the nematic phase, electric fields lead
to a temperature shift that is linear in the field strength. Electric fields
induce nematic order, again linear in the field strength. If strong enough,
electric fields can change the tetrahedral structure and symmetry leading to a
polar phase. We briefly deal with the T phase that arises when tetrahedral
order occurs in a system of chiral molecules. To case (a) belong (i) the
non-polar, achiral, optically uniaxial D2d phase with ambidextrous helicity and
with orientational frustration in external fields, (ii) the non-polar
tetragonal S4 phase, (iii) the non-polar, orthorhombic D2 phase that is
structurally chiral featuring ambidextrous chirality, (iv) the polar
orthorhombic C2v phase, and (v) the polar monoclinic C2 phase. Case (b) results
in a trigonal C3v phase that behaves like a biaxial polar nematic phase.
Finally we discuss some experiments that show typical effects related to the
existence of tetrahedral order.


title: Measurements of charged-particle distributions with the ATLAS detector

abstract:
  Inclusive charged-particle measurements probe the low-energy region of the
non-perturbative quantum chromodynamics. The ATLAS collaboration has recently
measured the charged-particle multiplicity and its dependence on transverse
momentum and pseudorapidity in special data sets with low LHC beam currents,
recorded at centre-of-mass energies of 8 TeV and 13 TeV. The measurements at 8
TeV cover a wide spectrum using charged-particle selections with minimum
transverse momentum of both 100 MeV and 500 MeV and in various phase space
regions of low and high charged-particle multiplicities, some of which are
studied for the first time by ATLAS. The measurements at 13 TeV also present
detailed studies with a minimum transverse momentum of both 100 MeV and 500
MeV. The measurements are compared with predictions of various tuned Monte
Carlo generators and are found to provide strong constraints on these. None of
the Monte Carlo generators with their respective tunes are able to reproduce
all the features of the data.


title: Rotors in triangles and tethrahedra

abstract:
  A polytope $P$ is circumscribed about a convex body $\Phi\subset
\mathbb{R}^n$ if $\Phi\subset P$ and each facet of $P$ is contained in a
support hyperplane of $\Phi$. We say that a convex body $\Phi\subset
\mathbb{R}^n$ is a rotor of a polytope $P$ if for each rotation $\rho$ of
$\mathbb{R}^n$ there exist a translation $\tau$ so that $P$ is circumscribed
about $\tau\rho\Phi$.
  In this paper we shall prove that if $P$ is a triangle, then there is a
baricentric formula that describes the curvature of bd$\Phi$ at the contact
points, $\{A_1, A_2,A_3\}$. We prove also that if $\Phi\subset \mathbb{R}^3$ is
a convex body which is a rotor in a tetrahedron $T$ and if $\Phi$ intersects
the faces of $T$ at the points $\{x_1, \dots, x_4\}$, then the normal lines of
$\Phi$ at the contact points with $T$, $\{x_1, \dots, x_4\}$ generically belong
to one ruling of a quadric surface.


title:
Novel Electron-Phonon Relaxation Pathway in Graphite Revealed by
  Time-Resolved Raman Scattering and Angle-Resolved Photoemission Spectroscopy

abstract:
  Time dynamics of photoexcited electron-hole pairs is important for a number
of technologies, in particular solar cells. We combined ultrafast pump-probe
Raman scattering and photoemission to directly follow electron-hole excitations
as well as the G-phonon in graphite after an excitation by an intense laser
pulse. This phonon is known to couple relatively strongly to electrons.
Cross-correlating effective electronic and phonon temperatures places new
constraints on model-based fits. The accepted two-temperature model predicts
that G-phonon population should start to increase as soon as excited
electron-hole pairs are created and that the rate of increase should not depend
strongly on the pump fluence. Instead we found that the increase of the
G-phonon population occurs with a delay of $\sim$65 fs. This time-delay is also
evidenced by the absence of the so-called self-pumping for G phonons. It
decreases with increased pump fluence. We show that these observations imply a
new relaxation pathway: Instead of hot carriers transferring energy to
G-phonons directly, the energy is first transferred to optical phonons near the
zone boundary K-points, which then decay into G-phonons via phonon-phonon
scattering. Our work demonstrates that phonon-phonon interactions must be
included in any calculations of hot carrier relaxation in optical absorbers
even when only short timescales are considered.


title:
Gamma-Ray Emission from Supernova Remnants and Surrounding Molecular
  Clouds

abstract:
  Galactic cosmic rays are believed to be accelerated at supernova remnant
shocks. Gamma-ray observations of both supernova remnants and associated
molecular clouds have been used in several occasions to test (so far quite
successfully) this popular hypothesis. Despite that, a conclusive solution to
the problem of cosmic ray origin is still missing, and further observational
and theoretical efforts are needed. In this paper, the current status of these
investigations is briefly reviewed.


title:
Enhancing ICA Performance by Exploiting Sparsity: Application to FMRI
  Analysis

abstract:
  Independent component analysis (ICA) is a powerful method for blind source
separation based on the assumption that sources are statistically independent.
Though ICA has proven useful and has been employed in many applications,
complete statistical independence can be too restrictive an assumption in
practice. Additionally, important prior information about the data, such as
sparsity, is usually available. Sparsity is a natural property of the data, a
form of diversity, which, if incorporated into the ICA model, can relax the
independence assumption, resulting in an improvement in the overall separation
performance. In this work, we propose a new variant of ICA by entropy bound
minimization (ICA-EBM)-a flexible, yet parameter-free algorithm-through the
direct exploitation of sparsity. Using this new SparseICA-EBM algorithm, we
study the synergy of independence and sparsity through simulations on synthetic
as well as functional magnetic resonance imaging (fMRI)-like data.


title: Holographic Theory of Gravity and Cosmology

abstract:
  According to the holographic principle, the maximum amount of information
stored in a region of space scales as the area of its two-dimensional surface,
like a hologram. We show that the holographic principle can be understood
heuristically as originated from quantum fluctuations of spacetime. Applied to
cosmology, this consideration leads to a dynamical cosmological constant
$\Lambda$ of the observed magnitude, in agreement with the result obtained for
the present and recent cosmic eras, by using unimodular gravity and causal-set
theory. By generalizing the concept of entropic gravity, we find a critical
acceleration parameter related to $\Lambda$ in galactic dynamics, and we
construct a phenomenological model of dark matter which we call "modified dark
matter" (MDM). We provide successful observational tests of MDM at both the
galactic and cluster scales. We also discuss the possibility that the quanta of
both dark energy and dark matter obey the quantum Boltzmann statistics or
infinite statistics as described by a curious average of the bosonic and
fermionic algebras.


title:
The Spread of Cooperative Strategies on Grids with Random Asynchronous
  Updating

abstract:
  The Prisoner's Dilemma Process on a graph $G$ is an iterative process where
each vertex, with a fixed strategy (cooperate or defect), plays the game with
each of its neighbours. At the end of a round each vertex may change its
strategy to that of its neighbour with the highest pay-off. Here we study the
spread of cooperative and selfish behaviours on a toroidal grid, where each
vertex is initially a cooperator with probability $p$. When vertices are
permitted to change their strategies via a randomized asynchronous update
scheme, we find that for some values of $p$ the limiting density of cooperators
may be modelled as a polynomial in $p$. Theoretical bounds for this density are
confirmed via simulation.


title:
Many-body localization and delocalization from the perspective of
  Integrals of Motion

abstract:
  We study many-body localization (MBL) and delocalization from the perspective
of integrals of motion (IOMs). MBL can be understood phenomenologically through
the existence of macroscopically many localized IOMs. However, IOMs exist for
all many-body systems, and non-localized IOMs determine properties on the
ergodic side of the MBL transition too. Here we explore their properties using
our method of displacement transformations. We show how different quantities
can be calculated using the IOMs as an expansion in the number of operators.
For all values of disorder the typical IOMs are localized, suggesting the
importance of rare fluctuations in understanding the delocalization transition.


title: Relative weights approach to dynamical fermions at finite densities

abstract:
  The method of relative weights, coupled with mean field theory, is applied to
the problem of simulating gauge theories with dynamical staggered fermions at
finite densities. We present initial results and discuss issues so far
encountered.


title:
On the effects of alternative optima in context-specific metabolic model
  predictions

abstract:
  Recent methodological developments have facilitated the integration of
high-throughput data into genome-scale models to obtain context-specific
metabolic reconstructions. A unique solution to this data integration problem
often may not be guaranteed, leading to a multitude of context-specific
predictions equally concordant with the integrated data. Yet, little attention
has been paid to the alternative optima resulting from the integration of
context-specific data. Here we present computational approaches to analyze
alternative optima for different context-specific data integration instances.
By using these approaches on metabolic reconstructions for the leaf of
Arabidopsis thaliana and the human liver, we show that the analysis of
alternative optima is key to adequately evaluating the specificity of the
predictions in particular cellular contexts. While we provide several ways to
reduce the ambiguity in the context-specific predictions, our findings indicate
that the existence of alternative optimal solutions warrant caution in detailed
context-specific analyses of metabolism.


title: Integral operator approach over octonions to solution of nonlinear PDE

abstract:
  Integration of nonlinear partial differential equations with the help of the
non-commutative integration over octonions is studied. An apparatus permitting
to take into account symmetry properties of PDOs is developed. For this purpose
formulas for calculations of commutators of integral and partial differential
operators are deduced. Transformations of partial differential operators and
solutions of partial differential equations are investigated. Theorems
providing solutions of nonlinear PDEs are proved. Examples are given.
Applications to PDEs of hydrodynamics and other types PDEs are described.


title: Finding Online Extremists in Social Networks

abstract:
  Online extremists in social networks pose a new form of threat to the general
public. These extremists range from cyberbullies who harass innocent users to
terrorist organizations such as the Islamic State of Iraq and Syria (ISIS) that
use social networks to recruit and incite violence. Currently social networks
suspend the accounts of such extremists in response to user complaints. The
challenge is that these extremist users simply create new accounts and continue
their activities. In this work we present a new set of operational capabilities
to deal with the threat posed by online extremists in social networks.
  Using data from several hundred thousand extremist accounts on Twitter, we
develop a behavioral model for these users, in particular what their accounts
look like and who they connect with. This model is used to identify new
extremist accounts by predicting if they will be suspended for extremist
activity. We also use this model to track existing extremist users as they
create new accounts by identifying if two accounts belong to the same user.
Finally, we present a model for searching the social network to efficiently
find suspended users' new accounts based on a variant of the classic Polya's
urn setup. We find a simple characterization of the optimal search policy for
this model under fairly general conditions. Our urn model and main theoretical
results generalize easily to search problems in other fields.


title:
Detection of faint broad emission lines in type 2 AGN: I. Near infrared
  observations and spectral fitting

abstract:
  We present medium resolution near infrared spectroscopic observations of 41
obscured and intermediate class AGN (type 2, 1.9 and 1.8; AGN2) with redshift
$z \lesssim$0.1, selected from the Swift/BAT 70-month catalogue. The
observations have been carried out in the framework of a systematic study of
the AGN2 near infrared spectral properties and have been executed using
ISAAC/VLT, X-shooter/VLT and LUCI/LBT, reaching an average S/N ratio of
$\sim$30 per resolution element. For those objects observed with X-shooter we
also obtained simultaneous optical and UV spectroscopy. We have identified a
component from the broad line region in 13 out of 41 AGN2, with FWHM ${\rm >
800 }$ km/s. We have verified that the detection of the broad line region
components does not significantly depend on selection effects due to the
quality of the spectra, the X-ray or near infrared fluxes, the orientation
angle of the host galaxy or the hydrogen column density measured in the X-ray
band. The average broad line region components found in AGN2 has a
significantly (a factor 2) smaller FWHM if compared with a control sample of
type 1 AGN.


title:
Measuring neutrino-induced exclusive charge-current final states on
  hydrogen at T2K

abstract:
  By taking advantage of symmetries with respect to the plane containing the
directions of the neutrino and outgoing lepton, it is possible to isolate
neutrino interactions on hydrogen in composite nuclear targets. This technique
enables us to study the `primary' neutrino-nucleon interaction and therefore
gain access to fundamental model parameters free from nuclear effects. Using
T2K Monte Carlo equivalent to $\sim7\times10^{21}$ POT, we present an update on
the measurement of the exclusive charged-current $\mu^-$, p, $\pi^+$ final
state on hydrogen.


title:
Commensurability for certain right-angled Coxeter groups and geometric
  amalgams of free groups

abstract:
  We give explicit necessary and sufficient conditions for the abstract
commensurability of certain families of 1-ended, hyperbolic groups, namely
right-angled Coxeter groups defined by generalized theta-graphs and cycles of
generalized theta-graphs, and geometric amalgams of free groups whose JSJ
graphs are trees of diameter at most 4. We also show that if a geometric
amalgam of free groups has JSJ graph a tree, then it is commensurable to a
right-angled Coxeter group, and give an example of a geometric amalgam of free
groups which is not quasi-isometric (hence not commensurable) to any group
which is finitely generated by torsion elements. Our proofs involve a new
geometric realization of the right-angled Coxeter groups we consider, such that
covers corresponding to torsion-free, finite-index subgroups are surface
amalgams.


title: The Hodge theory of the Hecke category

abstract:
  Ideas from Hodge theory have found important applications in representation
theory. We give a survey of joint work with Ben Elias which uncovers Hodge
theoretic structure in the Hecke category ("Soergel bimodules"). We also
outline similarities and differences to other combinatorial Hodge theories.


title: Charge transfer at hybrid inorganic-organic interfaces

abstract:
  Organic dopants are frequently used to surface-dope inorganic semiconductors.
The resulted hybrid inorganic-organic materials have a crucial role in advanced
functional materials and semiconductor devices. In this article, we study
charge transfer at hybrid silicon-molecule interfaces theoretically. The idea
is to filter out the best molecular acceptors to dope silicon with hole
densities as high as 1013 cm-2. Here, we use a combinatorial algorithm merging
chemical hardness method and first-principles DFT and GW calculations. We start
by using the chemical hardness method which is simple and fast to narrow down
our search for molecular dopants. Then, for the most optimistic candidates, we
perform first-principles DFT calculations and discuss the necessity of GW
corrections. This screening approach is quite general and applicable to other
hybrid interfaces.


title:
Pairing between zeros and critical points of random polynomials with
  independent roots

abstract:
  Let $p_n$ be a random, degree $n$ polynomial whose roots are chosen
independently according to the probability measure $\mu$ on the complex plane.
For a deterministic point $\xi$ lying outside the support of $\mu$, we show
that almost surely the polynomial $q_n(z):=p_n(z)(z - \xi)$ has a critical
point at distance $O(1/n)$ from $\xi$. In other words, conditioning the random
polynomials $p_n$ to have a root at $\xi$, almost surely forces a critical
point near $\xi$. More generally, we prove an analogous result for the critical
points of $q_n(z):=p_n(z)(z - \xi_1)\cdots (z - \xi_k)$, where $\xi_1, \ldots,
\xi_k$ are deterministic. In addition, when $k=o(n)$, we show that the
empirical distribution constructed from the critical points of $q_n$ converges
to $\mu$ in probability as the degree tends to infinity, extending a recent
result of Kabluchko.


title: Multilevel Anomaly Detection for Mixed Data

abstract:
  Anomalies are those deviating from the norm. Unsupervised anomaly detection
often translates to identifying low density regions. Major problems arise when
data is high-dimensional and mixed of discrete and continuous attributes. We
propose MIXMAD, which stands for MIXed data Multilevel Anomaly Detection, an
ensemble method that estimates the sparse regions across multiple levels of
abstraction of mixed data. The hypothesis is for domains where multiple data
abstractions exist, a data point may be anomalous with respect to the raw
representation or more abstract representations. To this end, our method
sequentially constructs an ensemble of Deep Belief Nets (DBNs) with varying
depths. Each DBN is an energy-based detector at a predefined abstraction level.
At the bottom level of each DBN, there is a Mixed-variate Restricted Boltzmann
Machine that models the density of mixed data. Predictions across the ensemble
are finally combined via rank aggregation. The proposed MIXMAD is evaluated on
high-dimensional realworld datasets of different characteristics. The results
demonstrate that for anomaly detection, (a) multilevel abstraction of
high-dimensional and mixed data is a sensible strategy, and (b) empirically,
MIXMAD is superior to popular unsupervised detection methods for both
homogeneous and mixed data.


title: Quark Helicity and Transversity Distributions

abstract:
  The quark transversity distribution inside nucleon is less understood than
the quark unpolarized and helicity distributions inside nucleon. In particular,
it is important to know clearly why the quark helicity and transversity
distributions are different. We investigate the origin of their discrepancy.


title: DeepGraph: Graph Structure Predicts Network Growth

abstract:
  The topological (or graph) structures of real-world networks are known to be
predictive of multiple dynamic properties of the networks. Conventionally, a
graph structure is represented using an adjacency matrix or a set of
hand-crafted structural features. These representations either fail to
highlight local and global properties of the graph or suffer from a severe loss
of structural information. There lacks an effective graph representation, which
hinges the realization of the predictive power of network structures.
  In this study, we propose to learn the represention of a graph, or the
topological structure of a network, through a deep learning model. This
end-to-end prediction model, named DeepGraph, takes the input of the raw
adjacency matrix of a real-world network and outputs a prediction of the growth
of the network. The adjacency matrix is first represented using a graph
descriptor based on the heat kernel signature, which is then passed through a
multi-column, multi-resolution convolutional neural network. Extensive
experiments on five large collections of real-world networks demonstrate that
the proposed prediction model significantly improves the effectiveness of
existing methods, including linear or nonlinear regressors that use
hand-crafted features, graph kernels, and competing deep learning methods.


title:
Gd$^{3+}$ - Gd$^{3+}$ distances exceeding 3 nm determined by very high
  frequency continuous wave electron paramagnetic resonance

abstract:
  Electron paramagnetic resonance spectroscopy in combination with
site-directed spin-labeling is a very powerful tool for elucidating the
structure and organization of biomolecules. Gd$^{3+}$ complexes have recently
emerged as a new class of spin labels for distance determination by pulsed EPR
spectroscopy at Q- and W-band. We present CW EPR measurements at 240 GHz (8.6
Tesla) on a series of Gd-rulers of the type Gd-PyMTA---spacer---Gd-PyMTA, with
Gd-Gd distances ranging from 1.2 nm to 4.3 nm. CW EPR measurements of these
Gd-rulers show that significant dipolar broadening of the central
$|-1/2\rangle\rightarrow|1/2\rangle$ transition occurs at 30 K for Gd-Gd
distances up to $\sim$ 3.4 nm with Gd-PyMTA as the spin label. This represents
a significant extension for distances accessible by CW EPR, as nitroxide-based
spin labels at X-band frequencies can typically only access distances up to
$\sim$ 2 nm. We show that this broadening persists at biologically relevant
temperatures above 200 K, and that this method is further extendable up to room
temperature by immobilizing the sample in glassy trehalose. We show that the
peak-to-peak broadening of the central transition follows the expected $~1/r^3$
dependence for the electron-electron dipolar interaction, from cryogenic
temperatures up to room temperature. A simple procedure for simulating the
dependence of the lineshape on interspin distance is presented, in which the
broadening of the central transition is modeled as an $S=1/2$ spin whose CW EPR
lineshape is broadened through electron-electron dipolar interactions with a
neighboring $S=7/2$ spin.


title: First-principles analysis of electron transport in BaSnO$_3$

abstract:
  BaSnO$_3$ (BSO) is a promising transparent conducting oxide (TCO) with
reported room-temperature (RT) Hall mobility exceeding 320
cm$^{2}$V$^{-1}$s$^{-1}$. Among perovskite oxides, it has the highest RT
mobility, about 30 times higher than that of the prototypical SrTiO$_3$. Using
first-principles calculations based on hybrid density functional theory, we
elucidate the physical mechanisms that govern the mobility by studying the
details of LO-phonon and ionized impurity scattering. A careful numerical
analysis to obtain converged results within the relaxation-time approximation
of Boltzmann transport theory is presented. The ${\bf k}$ dependence of the
relaxation time is fully taken into account. We find that the high RT mobility
in BSO originates not only from a small effective mass, but also from a
significant reduction in the phonon scattering rate compared to other
perovskite oxides; the origins of this reduction are identified. Ionized
impurity scattering influences the total mobility even at RT for dopant
densities larger than $5\times10^{18}$ cm$^{-3}$, and becomes comparable to
LO-phonon scattering for $1\times10^{20}$ cm$^{-3}$ doping, reducing the drift
mobility from its intrinsic LO-phonon-limited value of $\sim$594
cm$^{2}$V$^{-1}$s$^{-1}$ to less than 310 cm$^{2}$V$^{-1}$s$^{-1}$. We suggest
pathways to avoid impurity scattering via modulation doping or polar
discontinuity doping. We also explicitly calculate the Hall factor and Hall
mobility, allowing a direct comparison to experimental reports for bulk and
thin films and providing insights into the nature of the dominant mechanisms
that limit mobility in state-of-the art samples.


title: QCD and $\gamma\,\gamma$ studies at FCC-ee

abstract:
  The Future Circular Collider (FCC) is a post-LHC project aiming at searches
for physics beyond the SM in a new 80--100~km tunnel at CERN. Running in its
first phase as a very-high-luminosity electron-positron collider (FCC-ee), it
will provide unique possibilities for indirect searches of new phenomena
through high-precision tests of the SM. In addition, by collecting tens of
ab$^{-1}$ integrated luminosity in the range of center-of-mass energies
$\sqrt{s}$~=90--350~GeV, the FCC-ee also offers unique physics opportunities
for precise measurements of QCD phenomena and of photon-photon collisions
through, literally, billions of hadronic final states as well as unprecedented
large fluxes of quasireal $\gamma$'s radiated from the $\rm e^+e^-$ beams. We
succinctly summarize the FCC-ee perspectives for high-precision extractions of
the QCD coupling, for detailed analyses of parton radiation and fragmentation,
and for SM and BSM studies through $\gamma\gamma$ collisions.


title: Witten indices of abelian M5 brane on $\mathbb{R}\times S^5$

abstract:
  Witten indices and partition functions are computed for abelian 6d tensor and
hypermultiplets on $\mathbb{R}\times S^5$ in Lorentzian signature in an R gauge
field background which preserves some supersymmetry. We consider a generic
supersymmetric squashing that also admits squashing of the Hopf fiber. Wick
rotation to Euclidean M5 brane amounts to Wick rotation of squashing parameters
and the hypermultiplet mass parameter. We compute Casimir energies for tensor
and hypermultiplets separately for general squashing, and match these with the
corresponding gravitational anomaly polynomials. We extract Witten indices on
$\mathbb{R}\times \mathbb{CP}^2$ and find that this is zero, again matching
with the vanishing anomaly polynomial on an odd dimensional space.


title:
Distinguishing the nonjet azimuth quadrupole from QCD jets and
  hydrodynamic flows via 2D angular correlations and quadrupole spectrum
  analysis

abstract:
  According to the flow narrative commonly applied to high-energy nuclear
collisions a 1D cylindrical-quadrupole component of 2D angular correlations
conventionally denoted by quantity $v_2$ is interpreted to represent elliptic
flow: azimuth modulation of transverse or radial flow in noncentral
nucleus-nucleus (A-A) collisions. The nonjet (NJ) quadrupole component exhibits
various properties inconsistent with a flow or hydro interpretation, including
the observation that NJ-quadrupole centrality variation in $A$-$A$ collisions
has no relation to strongly-varying jet modification ("jet quenching") in those
collisions commonly attributed to jet interaction with a dense flowing medium.
In the present study I report isolation of quadrupole spectra from
$p_t$-differential $v_2(p_t)$ data obtained at the relativistic heavy ion
collider (RHIC) and large hadron collider (LHCr). I demonstrate that NJ
quadrupole spectra have characteristics very different from the single-particle
spectra for most hadrons, that quadrupole spectra indicate a common boosted
hadron source for a small minority of hadrons that "carry" the quadrupole
structure, that the narrow source-boost distribution is characteristic of an
expanding thin cylindrical shell (also strongly contradicting a hydro
interpretation), and that in the boost frame a single universal quadrupole
spectrum (L\'evy distribution) on transverse mass $m_t$ accurately describes
data for several hadron species scaled according to their statistical-model
abundances. The quadrupole spectrum shape changes very little from RHIC to LHC
energies. Taken in combination those characteristics strongly suggest a unique
{\em nonflow} (and nonjet) QCD mechanism for the NJ quadrupole conventionally
represented by $v_2$.


title:
Robust quantum state transfer between two superconducting qubits via
  partial measurement

abstract:
  We develop a potentially practical proposal for robust quantum state transfer
(QST) between two superconducting qubits coupled by a coplanar waveguide (CPW)
resonator. We show that the partial measurement could drastically enhance the
fidelity even when the dissipation of qubits and CPW is considered. Unlike many
other schemes for QST, our proposal does not require the couplings between the
qubits and the CPW resonator to be strong. In fact, our method works much more
efficiently in the weak coupling regime. The underlying mechanism is attributed
to the probabilistic nature of partial measurement.


title: Using Fast Weights to Attend to the Recent Past

abstract:
  Until recently, research on artificial neural networks was largely restricted
to systems with only two types of variable: Neural activities that represent
the current or recent input and weights that learn to capture regularities
among inputs, outputs and payoffs. There is no good reason for this
restriction. Synapses have dynamics at many different time-scales and this
suggests that artificial neural networks might benefit from variables that
change slower than activities but much faster than the standard weights. These
"fast weights" can be used to store temporary memories of the recent past and
they provide a neurally plausible way of implementing the type of attention to
the past that has recently proved very helpful in sequence-to-sequence models.
By using fast weights we can avoid the need to store copies of neural activity
patterns.


title: Understanding experimentally-observed fluctuations

abstract:
  We discuss two topics on the experimental measurements of fluctuation
observables in relativistic heavy-ion collisions. First, we discuss the effects
of the thermal blurring, i.e. the blurring effect arising from the experimental
measurement of fluctuations in momentum space as a proxy of the thermal
fluctuations defined in coordinate space, on higher order cumulants. Second, we
discuss the effect of imperfect efficiency of detectors on the measurement of
higher order cumulants. We derive effective formulas which can carry out the
correction of this effect for higher order cumulants based on the binomial
model.


title:
Detecting macroscopic quantum coherence with a cavity optomechanical
  system

abstract:
  The rigorous resource framework of quantum coherence has been set up recently
and excited a wide variety of interests. Here we show that a quantum cavity
optomechanical system, as an emerging platform, can behave with a certain value
of quantum coherence at a macroscopic scale. We also find that the difference
between the total optomechanical coherence and the sum of the optical and the
mechanical coherence just equals their mutual information. Motivated by the
detection of the optomechanical entanglement, an experimentally feasible scheme
to probe the optomechanical coherence is proposed.


title: Algebraic representations and constructible sheaves

abstract:
  These are notes for my Takagi lecture at the University of Tokyo in November,
2016. I survey what is known about simple modules for reductive algebraic
groups. The emphasis is on characteristic p>0 and Lusztig's character formula.
I explain ideas connecting representations and constructible sheaves
(Finkelberg-Mirkovic conjecture) in the spirit of the Kazhdan-Lusztig
conjecture. I also discuss a conjecture with S. Riche (a theorem for GL_n)
which should eventually make computations more feasible.


title: There are asymptotically the same number of Latin squares of each parity

abstract:
  A Latin square is reduced if its first row and column are in natural order.
For Latin squares of a particular order $n$ there are four possible different
parities. We confirm a conjecture of Stones and Wanless by showing asymptotic
equality between the numbers of reduced Latin squares of each possible parity
as the order $n\rightarrow\infty$.


title: Cousin groups and Hodge structures

abstract:
  We consider the geometric properties of Hodge Cousin groups, introduced in an
unpublished paper \cite{OVV}, emphasizing the case of Hodge Cousin groups
corresponding to polarized $\mathbb{Q}$-Hodge structures. Basing on this
consideration, we introduce the class of abelian Cousin groups and prove an
analogue of Poincar\'e complete reducibility theorem for them.


title: Foundations of Modern Query Languages for Graph Databases

abstract:
  We survey foundational features underlying modern graph query languages. We
first discuss two popular graph data models: edge-labelled graphs, where nodes
are connected by directed, labelled edges; and property graphs, where nodes and
edges can further have attributes. Next we discuss the two most fundamental
graph querying functionalities: graph patterns and navigational expressions. We
start with graph patterns, in which a graph-structured query is matched against
the data. Thereafter we discuss navigational expressions, in which patterns can
be matched recursively against the graph to navigate paths of arbitrary length;
we give an overview of what kinds of expressions have been proposed, and how
they can be combined with graph patterns. We also discuss several semantics
under which queries using the previous features can be evaluated, what effects
the selection of features and semantics has on complexity, and offer examples
of such features in three modern languages that are used to query graphs:
SPARQL, Cypher and Gremlin. We conclude by discussing the importance of
formalisation for graph query languages; a summary of what is known about
SPARQL, Cypher and Gremlin in terms of expressivity and complexity; and an
outline of possible future directions for the area.


title: Molecular Beam Epitaxy of 2D-layered Gallium Selenide on GaN substrates

abstract:
  Large area epitaxy of two-dimensional (2D) layered materials with high
material quality is a crucial step in realizing novel device applications based
on 2D materials. In this work, we report high-quality, crystalline, large-area
gallium selenide (GaSe) films grown on bulk substrates such as c-plane sapphire
and gallium nitride (GaN) using a valved cracker source for Se. (002)-oriented
GaSe with random in-plane orientation of domains was grown on sapphire and GaN
substrates at a substrate temperature of 350-450 C with complete surface
coverage and smooth surface morphology. Higher growth temperature (575 C)
resulted in the formation of single-crystalline {\epsilon}-GaSe triangular
domains with six-fold symmetry confirmed by in-situ reflection high electron
energy diffraction (RHEED) and off-axis x-ray diffraction (XRD). A two-step
growth method involving high temperature nucleation of single crystalline
domains and low temperature growth to enhance coalescence was adopted to obtain
continuous (002)-oriented GaSe with an epitaxial relationship with the
substrate. While six-fold symmetry was maintained in the two step growth,
{\beta}-GaSe phase was observed in addition to the dominant {\epsilon}-GaSe in
cross-sectional scanning transmission electron microscopy images. This work
demonstrates the potential of growing high quality 2D-layered materials using
molecular beam epitaxy and can be extended to the growth of other transition
metal chalcogenides.


title:
Adaptive Substring Extraction and Modified Local NBNN Scoring for Binary
  Feature-based Local Mobile Visual Search without False Positives

abstract:
  In this paper, we propose a stand-alone mobile visual search system based on
binary features and the bag-of-visual words framework. The contribution of this
study is three-fold: (1) We propose an adaptive substring extraction method
that adaptively extracts informative bits from the original binary vector and
stores them in the inverted index. These substrings are used to refine visual
word-based matching. (2) A modified local NBNN scoring method is proposed in
the context of image retrieval, which considers the density of binary features
in scoring each feature matching. (3) In order to suppress false positives, we
introduce a convexity check step that imposes a convexity constraint on the
configuration of a transformed reference image. The proposed system improves
retrieval accuracy by 11% compared with a conventional method without
increasing the database size. Furthermore, our system with the convexity check
does not lead to false positive results.


title:
Auxiliary-field quantum Monte Carlo calculations with multiple-projector
  pseudopotentials

abstract:
  We have implemented recently developed multiple-projector pseudopotentials
into the planewave based auxiliary-field quantum Monte Carlo (pw-AFQMC) method.
Multiple-projector pseudopotentials can yield smaller planewave cut-offs while
maintaining or improving transferability. This reduces the computational cost
of pw-AFQMC, increasing its reach to larger and more complicated systems. We
discuss the use of non-local pseudopotentials in the separable
Kleinman-Bylander form, and the implementation in pw-AFQMC of the
multiple-projector optimized norm-conserving pseudopotential ONCVPSP of Hamann.
The accuracy of the method is first demonstrated by equation-of-state
calculations of the ionic insulator NaCl and more strongly correlated metal Cu.
The method is then applied to calibrate the accuracy of density functional
theory (DFT) predictions of the phase stability of recently discovered high
temperature and pressure superconducting sulfur hydride systems. We find that
DFT results are in good agreement with pw-AFQMC, due to near cancellation of
electron-electron correlation effects between different structures.


title:
Online Training of an Opto-Electronic Reservoir Computer Applied to
  Real-Time Channel Equalisation

abstract:
  Reservoir Computing is a bio-inspired computing paradigm for processing time
dependent signals. The performance of its analogue implementation are
comparable to other state of the art algorithms for tasks such as speech
recognition or chaotic time series prediction, but these are often constrained
by the offline training methods commonly employed. Here we investigated the
online learning approach by training an opto-electronic reservoir computer
using a simple gradient descent algorithm, programmed on an FPGA chip. Our
system was applied to wireless communications, a quickly growing domain with an
increasing demand for fast analogue devices to equalise the nonlinear distorted
channels. We report error rates up to two orders of magnitude lower than
previous implementations on this task. We show that our system is particularly
well-suited for realistic channel equalisation by testing it on a drifting and
a switching channels and obtaining good performances


title: Embodiment of Learning in Electro-Optical Signal Processors

abstract:
  Delay-coupled electro-optical systems have received much attention for their
dynamical properties and their potential use in signal processing. In
particular it has recently been demonstrated, using the artificial intelligence
algorithm known as reservoir computing, that photonic implementations of such
systems solve complex tasks such as speech recognition. Here we show how the
backpropagation algorithm can be physically implemented on the same
electro-optical delay-coupled architecture used for computation with only minor
changes to the original design. We find that, compared when the backpropagation
algorithm is not used, the error rate of the resulting computing device,
evaluated on three benchmark tasks, decreases considerably. This demonstrates
that electro-optical analog computers can embody a large part of their own
training process, allowing them to be applied to new, more difficult tasks.


title:
Safeguarding Decentralized Wireless Networks Using Full-Duplex Jamming
  Receivers

abstract:
  In this paper, we study the benefits of full-duplex (FD) receiver jamming in
enhancing the physical-layer security of a two-tier decentralized wireless
network with each tier deployed with a large number of pairs of a
single-antenna transmitter and a multi-antenna receiver. In the underlying
tier, the transmitter sends unclassified information, and the receiver works in
the halfduplex (HD) mode receiving the desired signal. In the overlaid tier,
the transmitter deliveries confidential information in the presence of randomly
located eavesdroppers, and the receiver works in the FD mode radiating jamming
signals to confuse eavesdroppers and receiving the desired signal
simultaneously. We provide a comprehensive performance analysis and network
design under a stochastic geometry framework. Specifically, we consider the
scenarios where each FD receiver uses single- and multi-antenna jamming, and
analyze the connection probability and the secrecy outage probability of a
typical FD receiver by providing accurate expressions and more tractable
approximations for the two metrics. We further determine the optimal deployment
of the FD-mode tier in order to maximize networkwide secrecy throughput subject
to constraints including the given dual probabilities and the network-wide
throughput of the HD-mode tier. Numerical results are demonstrated to verify
our theoretical findings, and show that network-wide secrecy throughput is
significantly improved by properly deploying the FD-mode tier.


title:
Dual atomic interferometer with a tunable point of minimum magnetic
  sensitivity

abstract:
  Atomic interferometers are often affected by magnetic field fluctuations.
Using the clock transition at zero magnetic field minimizes the effect of these
fluctuations. There is another transition in rubidium that minimizes the
magnetic sensitivity at 3.2 G.We combine the previous two transitions to obtain
minimum magnetic sensitivity at a tunable magnetic field between 2.2 and 3.2 G.
The two interferometers evolve independently from each other and we control the
magnetic sensitivity by changing the population in both transitions with a
microwave pulse.


title: Lexicon Integrated CNN Models with Attention for Sentiment Analysis

abstract:
  With the advent of word embeddings, lexicons are no longer fully utilized for
sentiment analysis although they still provide important features in the
traditional setting. This paper introduces a novel approach to sentiment
analysis that integrates lexicon embeddings and an attention mechanism into
Convolutional Neural Networks. Our approach performs separate convolutions for
word and lexicon embeddings and provides a global view of the document using
attention. Our models are experimented on both the SemEval'16 Task 4 dataset
and the Stanford Sentiment Treebank, and show comparative or better results
against the existing state-of-the-art systems. Our analysis shows that lexicon
embeddings allow to build high-performing models with much smaller word
embeddings, and the attention mechanism effectively dims out noisy words for
sentiment analysis.


title: Prototype Filter Design for FBMC in Massive MIMO Channels

abstract:
  We perform an asymptotic study on the performance of filter bank multicarrier
(FBMC) in the context of massive multi-input multi-output (MIMO). We show that
the signal-to-interference-plus-noise ratio (SINR) cannot grow unboundedly by
increasing the number of base station (BS) antennas, and is upper bounded by a
certain deterministic value. This is a result of the correlation between the
multi-antenna combining tap values and the channel impulse responses between
the terminals and the BS antennas. To solve this problem, we introduce a simple
FBMC prototype filter design method that removes this correlation, enabling us
to achieve arbitrarily large SINR values by increasing the number of BS
antennas.


title:
Design of Provably Physical-Constraint-Preserving Methods for General
  Relativistic Hydrodynamics

abstract:
  The paper develops high-order physical-constraint-preserving (PCP) methods
for general relativistic hydrodynamic (GRHD) equations, equipped with a general
equation of state. Here the physical constraints, describing the admissible
states of GRHD, are referred to the subluminal constraint on the fluid velocity
and the positivity of the density, pressure and specific internal energy.
Preserving these constraints is very important for robust computations,
otherwise violating one of them will lead to the ill-posed problem and
numerical instability. To overcome the difficulties arising from the inherent
strong nonlinearity contained in the constraints, we derive an equivalent
definition of the admissible states. Using this definition, we prove the
convexity, scaling invariance and Lax-Friedrichs (LxF) splitting property of
the admissible state set $\mathcal G$, and discover the dependence of $\mathcal
G$ on the spacetime metric. Unfortunately, such dependence yields the
non-equivalence of $\mathcal G$ at different points in curved spacetime, and
invalidates the convexity of $\mathcal G$ in analyzing PCP schemes. This
obstacle is effectively overcame by introducing a new formulation of the GRHD
equations. Based on this formulation and the above theories, a first-order LxF
scheme is designed on general unstructured mesh and rigorously proved to be PCP
under a CFL condition. With two types of PCP limiting procedures, we design
high-order, {\em provably} (not probably) PCP methods under discretization on
the proposed new formulation. These high-order methods include the PCP finite
difference, finite volume and discontinuous Galerkin methods.


title: Comment on "Anomalous Edge State in a Non-Hermitian Lattice"

abstract:
  In this comment, we criticize three main conclusions of the
letter\cite{Lee2016}. We show that the concept of fractional winding
number(FWN) is factitious, Lee's conclusions on Fig. 3 are finite-size effect
and the breakdown of bulk-boundary correspondence (BBBC) cannot be explained by
"defective".


title: Modeling Scalability of Distributed Machine Learning

abstract:
  Present day machine learning is computationally intensive and processes large
amounts of data. It is implemented in a distributed fashion in order to address
these scalability issues. The work is parallelized across a number of computing
nodes. It is usually hard to estimate in advance how many nodes to use for a
particular workload. We propose a simple framework for estimating the
scalability of distributed machine learning algorithms. We measure the
scalability by means of the speedup an algorithm achieves with more nodes. We
propose time complexity models for gradient descent and graphical model
inference. We validate our models with experiments on deep learning training
and belief propagation. This framework was used to study the scalability of
machine learning algorithms in Apache Spark.


title: The near-surface methane humidity on Titan

abstract:
  We retrieve vertical and meridional variations of methane mole fraction in
Titan's lower troposphere by re-analyzing near-infrared ground-based
observations from 17 July 2014 UT (Adamkovics et al., 2016). We generate
synthetic spectra using atmospheric methane profiles that do not contain
supersaturation or discontinuities to fit the observations, and thereby
retrieve minimum saturation altitudes and corresponding specific humidities in
the boundary layer. We relate these in turn to surface-level relative
humidities using independent surface temperature measurements. We also compare
our results with general circulation model simulations to interpret and
constrain the relationship between humidities and surface liquids. The results
show that Titan's lower troposphere is undersaturated at latitudes south of
60N, consistent with a dry surface there, but increases in humidity toward the
north pole indicate appreciable surface liquid coverage. While our observations
are consistent with considerably more liquid methane existing at the north pole
than is present in observed lakes, a degeneracy between low-level methane and
haze leads to substantial uncertainty in determining the extent of the source
region.


title:
Arc-like continua, Julia sets of entire functions, and Eremenko's
  Conjecture

abstract:
  A hyperbolic transcendental entire function with connected Fatou set is said
to be "of disjoint type". It is known that a disjoint-type function provides a
model for the dynamics near infinity of all maps in the same parameter space;
hence a good understanding of these functions has implications in wider
generality.
  Our goal is to study the topological properties of the Julia sets of entire
functions of disjoint type. In particular, we give a detailed description of
the topology of their connected components. More precisely, consider a "Julia
continuum" C of such a function, i.e. the closure in the Riemann sphere of a
component of the Julia set. We show that infinity is a terminal point of C, and
that C has span zero in the sense of Lelek; under a mild geometric assumption
on the function C is arc-like. (Whether every span zero continuum is also
arc-like was a famous question in continuum theory, only recently resolved in
the negative.) Conversely, we construct a single disjoint-type entire function
with the remarkable property that each arc-like continuum with at least one
terminal point is realised as a Julia continuum. The class of arc-like continua
with terminal points is uncountable. It includes, in particular, the
sin(1/x)-curve, the Knaster buckethandle and the pseudo-arc, so these can all
occur as Julia continua of a disjoint-type entire function.
  We give similar descriptions of the possible topology of Julia continua that
contain periodic points or points with bounded orbits, and answer a question of
Bara\'nski and Karpi\'nska by showing that Julia continua need not contain
points that are accessible from the Fatou set. Furthermore, we construct an
entire function whose Julia set has connected components on which the iterates
tend to infinity pointwise, but not uniformly. This is related to a famous
conjecture of Eremenko concerning escaping sets of entire functions.


title: Linear Process Bootstrap Unit Root Test

abstract:
  One of the most widely applied unit root test, Phillips-Perron test, enjoys
in general highpowers, but suffers from size distortions when moving average
noise exists. As a remedy, thispaper proposes a nonparametric bootstrap unit
root test that specifically targets moving aver-age noise. Via a bootstrap
functional central limit theorem, the consistency of this bootstrapapproach is
established under general assumptions which allows a large family of non-linear
timeseries. In simulation, this bootstrap test alleviates the size distortions
of the Phillips-Perrontest while preserving its high powers.


title: Semiclassical asymptotics of quantum weighted Hurwitz numbers

abstract:
  This work concerns the semiclassical asymptotics of quantum weighted double
Hurwitz numbers. We compute the leading term of the partition function for
three versions of the quantum weighted Hurwitz numbers, as well as lower order
semiclassical corrections. The classical limit $\hbar \to 0$ is shown to
reproduce the simple Hurwitz numbers studied by Pandharipande and Okounkov. The
KP-Toda $\tau$-function serving as generating function for the quantum Hurwitz
numbers is shown to converge in the classical limit to the generating function
of Pandharipande and Okounkov and, with suitable scaling, so do the partition
function, the weights and expectations of Hurwitz numbers.


title:
Effects of Substrate Heating and Wettability on Evaporation Dynamics and
  Deposition Patterns for a Sessile Water Droplet Containing Colloidal
  Particles

abstract:
  Effects of substrate temperature, substrate wettability and particles
concentration are experimentally investigated for evaporation of a sessile
water droplet containing colloidal particles. Time-varying droplet shapes and
temperature of the liquid-gas interface are measured using high-speed
visualization and infrared thermography, respectively. The motion of the
particles inside the evaporating droplet is qualitatively visualized by an
optical microscope and profile of final particle deposit is measured by an
optical profilometer. On a non-heated hydrophilic substrate, a ring-like
deposit forms after the evaporation, as reported extensively in the literature;
while on a heated hydrophilic substrate, a thinner ring with an inner deposit
is reported in the present work. The latter is attributed to Marangoni
convection and recorded motion of the particles as well as measured temperature
gradient across the liquid-gas interface confirms this hypothesis. The thinning
of the ring scales with the substrate temperature and is reasoned to stronger
Marangoni convection at larger substrate temperature. In case of a non-heated
hydrophobic substrate, an inner deposit forms due to very early depinning of
the contact line. On the other hand, in case of a heated hydrophobic substrate,
the substrate heating as well as larger particle concentration helps in the
pinning of the contact line, which results in a thin ring with an inner
deposit. We propose a regime map for predicting three types of deposits namely,
ring, thin ring with inner deposit and inner deposit - for varying substrate
temperature, substrate wettability and particles concentration. A first-order
model corroborates the liquid-gas interface temperature measurements and
variation in the measured ring profile with the substrate temperature.


title: Operadic categories and their skew monoidal categories of collections

abstract:
  I describe a generalization of the notion of operadic category due to Batanin
and Markl. For each such operadic category I describe a skew monoidal category
of collections, such that a monoid in this skew monoidal category is precisely
an operad over the operadic category. In fact I describe two skew monoidal
categories with this property. The first has the feature that the operadic
category can be recovered from the skew monoidal category of collections; the
second has the feature that the right unit constraint is invertible. In the
case of the operadic category S of finite sets and functions, for which an
operad is just a symmetric operad in the usual sense, the first skew monoidal
category has underlying category [N, Set], and the second is the usual monoidal
category of collections [P, Set] with the substitution monoidal structure.


title:
Deep Neural Networks for Improved, Impromptu Trajectory Tracking of
  Quadrotors

abstract:
  Trajectory tracking control for quadrotors is important for applications
ranging from surveying and inspection, to film making. However, designing and
tuning classical controllers, such as proportional-integral-derivative (PID)
controllers, to achieve high tracking precision can be time-consuming and
difficult, due to hidden dynamics and other non-idealities. The Deep Neural
Network (DNN), with its superior capability of approximating abstract,
nonlinear functions, proposes a novel approach for enhancing trajectory
tracking control. This paper presents a DNN-based algorithm as an add-on module
that improves the tracking performance of a classical feedback controller.
Given a desired trajectory, the DNNs provide a tailored reference input to the
controller based on their gained experience. The input aims to achieve a unity
map between the desired and the output trajectory. The motivation for this work
is an interactive "fly-as-you-draw" application, in which a user draws a
trajectory on a mobile device, and a quadrotor instantly flies that trajectory
with the DNN-enhanced control system. Experimental results demonstrate that the
proposed approach improves the tracking precision for user-drawn trajectories
after the DNNs are trained on selected periodic trajectories, suggesting the
method's potential in real-world applications. Tracking errors are reduced by
around 40-50% for both training and testing trajectories from users,
highlighting the DNNs' capability of generalizing knowledge.


title:
Lozenge tilings of a halved hexagon with an array of triangles removed
  from the boundary

abstract:
  Proctor's work on staircase plane partitions yields an enumeration of lozenge
tilings of a halved hexagon on the triangular lattice. Rohatgi recently
extended this tiling enumeration to a halved hexagon with a triangle removed
from the boundary. In this paper we prove a generalization of the results of
Proctor and Rohatgi by enumerating lozenge tilings of a halved hexagon in which
an array of adjacent triangles has been removed from the boundary.


title: Top Argelander Stars: Pedagogy & Prize

abstract:
  Stellar astronomy, fueled by massive capital investments, advances in
numerical modeling and theory, is resurgent and arguably is on the verge of a
magnificent renaissance. Powerful time domain optical surveys, both on ground
and in space, are producing data on variable stars on an unprecedented
industrial scale. Those with deep knowledge of variable stars will stand to
benefit from this resurgence. Notwithstanding these developments, in some
astronomical communities, classical stellar astronomy has been in the doldrums.
I offer a modest proposal to establish a basic level of familiarity with
variable stellar phenomenology and an attractive scheme to make research in
variable star astronomy visible, alluring and fashionable.


title: A criterion for a degree-one holomorphic map to be a biholomorphism

abstract:
  Let $X$ and $Y$ be compact connected complex manifolds of the same dimension
with $b_2(X)= b_2(Y)$. We prove that any surjective holomorphic map of degree
one from $X$ to $Y$ is a biholomorphism. A version of this was established by
the first two authors, but under an extra assumption that $\dim H^1(X {\mathcal
O}_X)\,=\,\dim H^1(Y {\mathcal O}_Y)$. We show that this condition is actually
automatically satisfied.


title:
Antiferroelectric nanodomains in the vicinity of the morphotropic
  boundary in PZT-based coarse-grained ceramics

abstract:
  Results presented in this article demonstrate importance of taking into
account such a phenomenon as the solid solution decomposition at the boundaries
separating coexisting phases in lead-zirconate-titanate-based solid solutions
with compositions belonging to the morphotropic boundary region of the
"temperature-composition" phase diagram. It is shown that in the local
decomposition of solid solutions in the vicinity of the boundaries separating
the tetragonal and rhombohedral phases in lead-zirconate-titanate-based solid
solutions lead to the changes of the chemical composition of the solid
solutions and to the formation of segregates. It is also shown that the proper
thermoelectric treatment of samples containing these segregates can give
substantially higher values of piezoelectric parameters in the
lead-zirconate-titanate-based compounds.


title:
Anomalous tunneling characteristic of Weyl semimetals with tilted energy
  dispersion

abstract:
  Weyl semimetal is a recently discovered state of quantum matter, which
generally possesses tilted energy dispersion. Here, we investigate the electron
tunneling through a Weyl semimetal p-n-p junction. The angular dependence of
electron tunneling exhibits an anomalous profile such that perfect transmission
angles are shifted along the direction of the tilt. Coupling of the tilted
dispersion and electrical potential within the barrier region gives rise to a
transverse momentum shift, which is analogous to the transverse Lorentz
displacement induced by magnetic barriers.


title: Semantics and Proof Theory of the Epsilon Calculus

abstract:
  The epsilon operator is a term-forming operator which replaces quantifiers in
ordinary predicate logic. The application of this undervalued formalism has
been hampered by the absence of well-behaved proof systems on the one hand, and
accessible presentations of its theory on the other. One significant early
result for the original axiomatic proof system for the epsilon-calculus is the
first epsilon theorem, for which a proof is sketched. The system itself is
discussed, also relative to possible semantic interpretations. The problems
facing the development of proof-theoretically well-behaved systems are
outlined.


title: Constructing center-stable tori

abstract:
  We show that any weakly partially hyperbolic diffeomorphism on the 2-torus
may be realized as the dynamics on a center-stable or center-unstable torus of
a 3-dimensional strongly partially hyperbolic system. We also construct
examples of center-stable and center-unstable tori in higher dimensions.


title: Explaining the observed deviation in R($D^{(*)}$) in an anomalous 2HDM

abstract:
  The reported combined excess of about 4$\sigma$, by BABAR, Belle and LHCb, in
the measurements of R($D^{(*)}$) and Br(B $\rightarrow \tau \nu_{\tau}$) from
that of the standard model expectation constitute the most significant
discrepancy from the standard model in collider experiments thus far(apart from
the non zero neutrino masses). Here we analyze the phenomenological
implications for these decay modes in a Flipped/Lepton-Specific
two-Higg-doublet model with anomalously enhanced charged Higgs coupling to
$\tau$/b. We conclude that this extension of the standard model can give
results in agreement within 1$\sigma$ of the experimental values for the
combination of R($D^{(*)}$) and Br(B $\rightarrow \tau \nu_{\tau}$) data.


title: Scalar Dark Matter: Real vs Complex

abstract:
  We update the parameter spaces for both a real and complex scalar dark matter
via the Higgs portal. In the light of constraints arising from the LUX 2016
data, the latest Higgs invisible decay and the gamma ray spectrum, the dark
matter resonant mass region is further restricted to a narrow window between
$54.9-62.3$ GeV in both cases, and its large mass region is excluded until
$834$ GeV and $3473$ GeV for the real and complex scalar, respectively.


title:
New tensor interaction as the source of the observed CP asymmetry in
  $\tau \to K_{S}\pi\nu_{\tau}$

abstract:
  Babar collaboration has reported an intriguing opposite sign in the
integrated decay rate asymmetry $A_{cp}(\tau \rightarrow K_{S}\pi\nu_{\tau})$
than that of SM prediction from the known K0 - $\bar{K0}$ mixing. Babar's
result deviate from the SM prediction by about 2.7$\sigma$. If the result
stands with higher precision in the future experiments, the observed sign
anomaly in the $A_{cp}(\tau \rightarrow K_{S}\pi\nu_{\tau})$ can most likely
come only from some new physics occurring possibly in both hadronic as well as
leptonic sectors. In this work, we will give an improved analysis of our
previous work where we have illustrated that, while non-standard scalar or
vector/axial-vector interactions will not contribute to the observed asymmetry
in the integrated decay rate, a new tensor interaction can explain the observed
anomaly. Assuming the real part of the new tensorial coupling is negligible
compare to its imaginary part and with $A_{cp}(\tau \rightarrow
K_{S}\pi\nu_{\tau})$ and Br($\tau \rightarrow K_{S}\pi\nu_{\tau}$) as data
points to fit the imaginary part of the NP coupling, we have been able to fit
the result within 1$\sigma$ of the experimental values.


title: The high order block RIP condition for signal recovery

abstract:
  In this paper, we consider the recovery of block sparse signals, whose
nonzero entries appear in blocks (or clusters) rather than spread arbitrarily
throughout the signal, from incomplete linear measurement. A high order
sufficient condition based on block RIP is obtained to guarantee the stable
recovery of all block sparse signals in the presence of noise, and robust
recovery when signals are not exactly block sparse via mixed $l_{2}/l_{1}$
minimization. Moreover, a concrete example is established to ensure the
condition is sharp. The significance of the results presented in this paper
lies in the fact that recovery may be possible under more general conditions by
exploiting the block structure of the sparsity pattern instead of the
conventional sparsity pattern.


title:
Performance of hybrid angle-energy dispersive X-ray diffraction and
  fluorescence portable system for non-invasive surface-mineral identification
  in Archaeometry

abstract:
  Low power energy dispersive XRD-XRF portable instruments equipped with
multiple angle scanning can take advantage of the shorter acquisition time of
EDXRD with respect to ADXRD, and bring closer higher accuracy and resolution of
inter-planar distance with those obtained by ADXRD. The data produced by this
new hybrid configuration is correlated in the sense that a single XRF or XRD
specimen appear in multiple spectra (the later shifted in energy for differing
angles). Hence, for fully benefit from the richer data released by this
configuration, the analysis should not be confined to the independent
processing of the spectra, specialized hybrid data processing should be
conceived. We previously reported some advances in the processing of the
resulting 3D data (intensity, energy and angle). Here the analytical
performance of the first hybrid angle-energy dispersive X-ray diffraction and
fluorescence portable system is assessed for non-invasive surface mineral
analysis of samples relevant for archaeometrical applications. We evaluate the
performance on standard reference material and probe applicability of the
methods so developed to identify stones (jadeite and omphacite), and pigments
(Prussian blue) in the pictorial layer of modeled paintings. Discussion
emphasize the improvement in accuracy of interplanar distance with respect to
EDXRD taken at a single fixed angles, evaluate the resolution of AD/EDXRD data,
and total acquisition time.


title:
Experimental investigation of a linear-chain structure in the nucleus
  14C

abstract:
  It is a well-known fact that a cluster of nucleons can be formed in the
interior of an atomic nucleus, and such clusters may occupy molecular-like
orbitals, showing characteristics similar to normal molecules consisting of
atoms. Chemical molecules having a linear alignment are commonly seen in
nature, such as carbon dioxide. A similar linear alignment of the nuclear
clusters, referred to as linear-chain cluster state (LCCS), has been studied
since the 1950s, however, up to now there is no clear experimental evidence
demonstrating the existence of such a state. Recently, it was proposed that an
excess of neutrons may offer just such a stabilizing mechanism, revitalizing
interest in the nuclear LCCS, specifically with predictions for their emergence
in neutron-rich carbon isotopes. Here we present the experimental observation
of {\alpha}-cluster states in the radioactive 14C nucleus. Using the
10Be+{\alpha} resonant scattering method with a radioactive beam, we observed a
series of levels which completely agree with theoretically predicted levels
having an explicit linear-chain cluster configuration. We regard this as the
first strong indication of the linear-chain clustered nucleus.


title: Rationality of Moduli space over reducible curve

abstract:
  Let $M(2,\textbf{\underline{w}},\chi)$ be the moduli space of rank $2$
torsion-free sheaves over a reducible nodal curve with each component having
utmost two nodal singularities. We show that in each component of
$M(2,\textbf{\underline{w}},\chi)$, the closure of rank $2$ vector bundles with
fixed determinant is rational.


title: A System for Identifying and Visualizing Influential Communities

abstract:
  In this paper, we introduce the concept of influential communities in a
co-author network. We term a community as the most influential if the community
has the highest influence among all other communities in the entire network.
Influence of a community depends on the impact of the contents (e.g., citations
of papers) generated by the members of that community. We propose an algorithm
to identify the top K influential communities of an online social network. As a
working prototype, we develop a visualization system that allows a user to find
the top K influential communities from a co-author network. A user can search
top K influential communities of particular research fields and our system
provides him/her with a visualization of these communities. A user can explore
the details of a community, such as authors, citations, and collaborations with
other communities.


title:
New physics effects in the Higgs trilinear self-coupling through
  one-loop radiative corrections

abstract:
  We compute the one-loop corrections to the triple Higgs self-interaction
$hhh$ in the framework of the Standard Model (SM), the Two Higgs Doublet Model
type III (THDM-III) and the Littlest Higgs Model with T parity (LHBM+T). Our
results are compared with previous results for the SM. In particular, we find
that an imaginary part for the $\lambda_{hhh}$ form factor is induced when one
of the Higgs boson legs is off-mass shell with 4-momentum magnitude higher than
the Higgs boson mass. This contribution is sensitive to virtual effects of the
Higgs self-interaction, that induces a radiative correction to the $hhh$
coupling of order 11%. However, the radiative corrections associated to the new
degrees of freedom of the THDM-III and the LHBM+T are rather smaller and
comparable to the $W^\pm$ and $Z^0$ gauge bosons one-loop corrections.


title: Quantum random number generation using an on-chip plasmonic beamsplitter

abstract:
  We report an experimental realisation of a quantum random number generator
using a plasmonic beamsplitter. Free-space single photons are converted into
propagating single surface plasmon polaritons on a gold stripe waveguide via a
grating. The surface plasmons are then guided to a region where they are
scattered into one of two possible outputs. The presence of a plasmonic
excitation in a given output determines the value of a random bit generated
from the quantum scattering process. Using a stream of single surface plasmons
injected into the beamsplitter we achieve a quantum random number generation
rate of 2.37 Mbits/s even in the presence of loss. We characterise the quality
of the random number sequence generated, finding it to be comparable to
sequences from other quantum photonic-based devices. The compact nature of our
nanophotonic device makes it suitable for tight integration in on-chip
applications, such as in quantum computing and communication schemes.


title:
Liouville Theorems for critical points of the p-Ginzburg-Landau type
  functional

abstract:
  In this paper, we consider the smooth map from a Riemannian manifold to the
standard Euclidean space and the p-Ginzburg-Landau energy. Under suitable
curvature conditions on the domain manifold, some Liouville type theorems are
established by assuming either growth conditions of the p-Ginzburg-Landau
energy or an asymptotic condition at the infinity for the maps. In the end of
paper, we obtain the unique constant solution of the constant Dirichlet
boundary value problems on starlike domains.


title: Under-Graduate Research in Physics : An Indian Perspective

abstract:
  It is now widely believed that research should be an essential and integral
part of under-graduate studies. In recent years there has been a conscious
effort to bring research opportunities to the physics under-graduates in India.
We argue that the need for the hour is a methodical evaluation of the existing
under-graduate research programs for their effectiveness in preparing the
students for a career in physics.


title: Weak Solution of a Doubly Degenerate Parabolic Equation

abstract:
  This paper studies a fourth-order, nonlinear, doubly-degenerate parabolic
equation derived from the thin film equation in spherical geometry. A
regularization method is used to study the equation and several useful
estimates are obtained. The main result of this paper is to prove the existence
of a weak solution of the equation in a weighted Sobolev space.


title: On a variant of Pillai's problem II

abstract:
  In this paper, we show that there are only finitely many $c$ such that the
equation $U_n - V_m = c$ has at least two distinct solutions $(n,m)$, where
$\{U_n\}_{n\geq 0}$ and $\{V_m\}_{m\geq 0}$ are given linear recurrence
sequences.


title:
A new improved error bound for linear complementarity problems for
  B-matrices

abstract:
  A new error bound for the linear complementarity problem when the matrix
involved is a B-matrix is presented, which improves the corresponding result in
[C.Q. Li et al., A new error bound for linear complementarity problems for
B-matrices. Electron. J. Linear Al., 31:476-484, 2016]. In addition some
sufficient conditions such that the new bound is sharper than that in [M.
Garca-Esnaola and J.M. Pena. Error bounds for linear complementarity problems
for B-matrices. Appl. Math. Lett., 22:1071-1075, 2009] are provided.


title: Three Baryon Interaction Generated by Determinant Interaction of Quarks

abstract:
  We discuss the three-baryon interaction generated by the determinant
interaction of quarks, known as the Kobayashi-Maskawa-'t Hooft (KMT)
interaction. The expectation value of the KMT interaction operator is
calculated in fully-antisymmetrized quark-cluster model wave functions for
one-, two- and three-octet baryon states. The three-baryon potential from the
KMT interaction is found to be repulsive for $NN\Lambda$ and $N\Lambda\Lambda$
systems, while it is zero for the $NNN$ system. The strength and range of the
three-baryon potential are found to be comparable to those for the $NNN$
three-body potential obtained in lattice QCD simulations. The contribution to
the $\Lambda$ single particle potential in nuclear matter is found to be 0.28
MeV and 0.73 MeV in neutron matter and symmetric nuclear matter at normal
nuclear density, respectively. These repulsive forces are not enough to solve
the hyperon puzzle, but may be measured in high-precision hyperisotope
experiments.


title:
Breakdown of a Benchmark Score Without Internal Analysis of Benchmarking
  Program

abstract:
  A breakdown of a benchmark score is how much each aspect of the system
performance affects the score. Existing methods require internal analysis on
the benchmarking program and then involve the following problems: (1) require a
certain amount of labor for code analysis, profiling, simulation, and so on and
(2) require the benchmarking program itself. In this paper, we present a method
for breaking down a benchmark score without internal analysis of the
benchmarking program. The method utilizes regression analysis of benchmark
scores on a number of systems. Experimental results with 3 benchmarks on 15
Android smartphones showed that our method could break down those benchmark
scores even though there is room for improvement in accuracy.


title:
Spectral boundary conditions and solitonic solutions in a classical
  Sellmeier dielectric

abstract:
  Electromagnetic field interactions in a dielectric medium represent a
longstanding field of investigation, both at the classical level and at the
quantum one. We propose a 1+1 dimensional toy-model which consists of an
half-line filling dielectric medium, with the aim to set up a simplified
situation where technicalities related to gauge invariance and, as a
consequence, physics of constrained systems are avoided, and still interesting
features appear. In particular, we simulate the electromagnetic field and the
polarization field by means of two coupled scalar fields $\phi$,$\psi$
respectively, in a Hopfield-like model. We find that, in order to obtain a
physically meaningful behaviour for the model, one has to introduce spectral
boundary conditions depending on the particle spectrum one is dealing with.
This is the first interesting achievement of our analysis. The second relevant
achievement is that, by introducing a nonlinear contribution in the
polarization field $\psi$, with the aim of mimicking a third order nonlinearity
in a nonlinear dielectric, we obtain solitonic solutions in the Hopfield model
framework, whose classical behaviour is analyzed too.


title:
Non-Asymptotic Delay Bounds for Multi-Server Systems with
  Synchronization Constraints

abstract:
  Multi-server systems have received increasing attention with important
implementations such as Google MapReduce, Hadoop, and Spark. Common to these
systems are a fork operation, where jobs are first divided into tasks that are
processed in parallel, and a later join operation, where completed tasks wait
until the results of all tasks of a job can be combined and the job leaves the
system. The synchronization constraint of the join operation makes the analysis
of fork-join systems challenging and few explicit results are known. In this
work, we model fork-join systems using a max-plus server model that enables us
to derive statistical bounds on waiting and sojourn times for general arrival
and service time processes. We contribute end-to-end delay bounds for
multi-stage fork-join networks that grow in $\mathcal{O}(h \ln k)$ for $h$
fork-join stages, each with $k$ parallel servers. We perform a detailed
comparison of different multi-server configurations and highlight their pros
and cons. We also include an analysis of single-queue fork-join systems that
are non-idling and achieve a fundamental performance gain, and compare these
results to both simulation and a live Spark system.


title: On matrix generalization of Robinson's Energy Delay Theorem

abstract:
  An elementary proof of Robinson's Energy Delay Theorem on minimum-phase
functions is presented. The proof is generalized to the matrix case as well.


title:
Theory on the mechanisms of combinatorial binding of transcription
  factors with DNA

abstract:
  We develop a theoretical framework on the mechanism of combinatorial binding
of transcription factors (TFs) with their specific binding sites on DNA. We
consider three possible mechanisms viz. monomer, hetero-oligomer and
coordinated recruitment pathways. In the monomer pathway, combinatorial TFs
search for their targets in an independent manner and the protein-protein
interactions among them will be insignificant. The protein-protein interactions
are very strong so that the hetero-oligomer complex of TFs as a whole searches
for the cognate sites in case of hetero-oligomer pathway. The TF which arrived
first will recruit the adjacent TFs in a sequential manner in the recruitment
pathway. The free energy released from the protein-protein interactions among
TFs will be in turn utilized to stabilize the TFs-DNA complex. Such coordinated
binding of TFs in fact emerges as the cooperative effect. Monomer and
hetero-oligomer pathways are efficient only when few TFs are involved in the
combinatorial regulation. Detailed random walk simulations suggest that when
the number of TFs in a combination increases then the searching efficiency of
TFs in these pathways decreases with the increasing number of TFs in a power
law manner. The power law exponent associated with the monomer pathway seems to
be strongly dependent on the number of TFs, distance between the initial
position of TFs from their specific binding sites and the hop size associated
with the dynamics of TFs on DNA.


title:
Functional limit theorems for the maxima of perturbed random walks and
  divergent perpetuities in the $M_1$-topology

abstract:
  Let $(\xi_1,\eta_1)$, $(\xi_2,\eta_2),\ldots$ be a sequence of i.i.d.
two-dimensional random vectors. In the earlier article Iksanov and Pilipenko
(2014) weak convergence in the $J_1$-topology on the Skorokhod space of
$n^{-1/2}\underset{0\leq k\leq \cdot}{\max}\,(\xi_1+\ldots+\xi_k+\eta_{k+1})$
was proved under the assumption that contributions of $\underset{0\leq k\leq
n}{\max}\,(\xi_1+\ldots+\xi_k)$ and $\underset{1\leq k\leq n}{\max}\,\eta_k$ to
the limit are comparable and that $n^{-1/2}(\xi_1+\ldots+\xi_{[n\cdot]})$ is
attracted to a Brownian motion. In the present paper, we continue this line of
research and investigate a more complicated situation when
$\xi_1+\ldots+\xi_{[n\cdot]}$, properly normalized without centering, is
attracted to a centered stable L\'{e}vy process, a process with jumps. As a
consequence, weak convergence normally holds in the $M_1$-topology. We also
provide sufficient conditions for the $J_1$-convergence. For completeness, less
interesting situations are discussed when one of the sequences $\underset{0\leq
k\leq n}{\max}\,(\xi_1+\ldots+\xi_k)$ and $\underset{1\leq k\leq
n}{\max}\,\eta_k$ dominates the other. An application of our main results to
divergent perpetuities with positive entries is given.


title:
William Herschel Telescope site characterization using the MOAO
  pathfinder CANARY on-sky data

abstract:
  Canary is the Multi-Object Adaptive Optics (MOAO) pathfinder for the future
MOAO-assisted Integral-Field Units (IFU) proposed for Extremely Large
Telescopes (ELT). The MOAO concept relies on tomographically reconstructing the
turbulence using multiple measurements along different lines of sight.
Tomography requires the knowledge of the statistical turbulence parameters,
commonly recovered from the system telemetry using a dedicated profiling
technique. For demonstration purposes with the MOAO pathfinder Canary , this
identification is performed thanks to the Learn & Apply (L&A) algorithm, that
consists in model- fitting the covariance matrix of WFS measurements dependent
on relevant parameters: $C_n^2(h)$ profile, outer scale profile and system
mis-registration. We explore an upgrade of this algorithm, the Learn 3 Steps
(L3S) approach, that allows one to dissociate the identification of the
altitude layers from the ground in order to mitigate the lack of convergence of
the required empirical covariance matrices therefore reducing the required
length of data time-series for reaching a given accuracy. For nominal
observation conditions, the L3S can reach the same level of tomographic error
in using five times less data frames than the L&A approach. The L3S technique
has been applied over a large amount of Canary data to characterize the turbu-
lence above the William Herschel Telescope (WHT). These data have been acquired
the 13th, 15th, 16th, 17th and 18th September 2013 and we find
0.67"/8.9m/3.07m/s of total seeing/outer scale/wind-speed, with
0.552"/9.2m/2.89m/s below 1.5 km and 0.263"/10.3m/5.22m/s between 1.5 and 20
km. We have also de- termined the high altitude layers above 20 km, missed by
the tomographic reconstruction on Canary , have a median seeing of 0.187" and
have occurred 16% of observation time.