title: Robust Equilibria in Concurrent Games

abstract:
  We study the problem of finding robust equilibria in multiplayer concurrent
games with mean payoff objectives. A $(k,t)$-robust equilibrium is a strategy
profile such that no coalition of size $k$ can improve the payoff of one its
member by deviating, and no coalition of size $t$ can decrease the payoff of
other players. We are interested in pure equilibria, that is, solutions that
can be implemented using non-randomized strategies. We suggest a general
transformation from multiplayer games to two-player games such that pure
equilibria in the first game correspond to winning strategies in the second
one. We then devise from this transformation, an algorithm which computes
equilibria in mean-payoff games. Robust equilibria in mean-payoff games reduce
to winning strategies in multidimensional mean-payoff games for some threshold
satisfying some constraints. We then show that the existence of such equilibria
can be decided in polynomial space, and that the decision problem is
PSPACE-complete.


title:
Optical lattice implementation scheme of a bosonic topological model
  with fermionic atoms

abstract:
  We present a scheme to implement a Fermi-Hubbard-like model in ultracold
atoms in optical lattices and analyze the topological features of its ground
state. In particular, we show that the ground state for appropriate parameters
has a large overlap with a lattice version of the bosonic Laughlin state at
filling factor one half. The scheme utilizes laser assisted and normal
tunnelling in a checkerboard optical lattice. The requirements on temperature,
interactions, and hopping strengths are similar to those needed to observe the
N\'eel antiferromagnetic ordering in the standard Fermi-Hubbard model in the
Mott insulating regime.


title: An optimal quantum algorithm for the oracle identification problem

abstract:
  In the oracle identification problem, we are given oracle access to an
unknown N-bit string x promised to belong to a known set C of size M and our
task is to identify x. We present a quantum algorithm for the problem that is
optimal in its dependence on N and M. Our algorithm considerably simplifies and
improves the previous best algorithm due to Ambainis et al. Our algorithm also
has applications in quantum learning theory, where it improves the complexity
of exact learning with membership queries, resolving a conjecture of Hunziker
et al.
  The algorithm is based on ideas from classical learning theory and a new
composition theorem for solutions of the filtered $\gamma_2$-norm semidefinite
program, which characterizes quantum query complexity. Our composition theorem
is quite general and allows us to compose quantum algorithms with
input-dependent query complexities without incurring a logarithmic overhead for
error reduction. As an application of the composition theorem, we remove all
log factors from the best known quantum algorithm for Boolean matrix
multiplication.


title: Two-Baryon Systems with Twisted Boundary Conditions

abstract:
  We explore the use of twisted boundary conditions in extracting the nucleon
mass and the binding energy of two-baryon systems, such as the deuteron, from
Lattice QCD calculations. Averaging the results of calculations performed with
periodic and anti-periodic boundary conditions imposed upon the light-quark
fields, or other pair-wise averages, improves the volume dependence of the
deuteron binding energy from ~exp(-kappa*L)/L to ~exp(-sqrt(2)kappa*L)/L.
However, a twist angle of pi/2 in each of the spatial directions improves the
volume dependence from ~exp(-kappa*L)/L to ~exp(-2kappa*L)/L. Twist averaging
the binding energy with a random sampling of twist angles improves the volume
dependence from ~exp^(-kappa*L)/L to ~exp(-2kappa*L)/L, but with a standard
deviation of ~exp(-kappa*L)/L, introducing a signal-to-noise issue in modest
lattice volumes. Using the experimentally determined phase shifts and mixing
angles, we determine the expected energies of the deuteron states over a range
of cubic lattice volumes for a selection of twisted boundary conditions.


title: Non-$\gamma_{5}$hermiticity minimal doubling fermion

abstract:
  We formulate new two dimensional fermions breaking $\gamma_{5}$hermiticity,
based on the minimal doubling fermion. We investigate their properties: (I)
Symmetries, (II) eigenvalue distributions, and (III)the number of poles. As a
simple application of the fermions, the Gross-Neveu model in two dimensions is
studied using the fermion. We obtain the parity broken phase diagram called
Aoki phase and the chiral broken phase diagram of the model with an imaginary
chemical potential.


title:
Spin glass reflection of the decoding transition for quantum error
  correcting codes

abstract:
  We study the decoding transition for quantum error correcting codes with the
help of a mapping to random-bond Wegner spin models.
  Families of quantum low density parity-check (LDPC) codes with a finite
decoding threshold lead to both known models (e.g., random bond Ising and
random plaquette $\Z2$ gauge models) as well as unexplored earlier generally
non-local disordered spin models with non-trivial phase diagrams. The decoding
transition corresponds to a transition from the ordered phase by proliferation
of extended defects which generalize the notion of domain walls to non-local
spin models. In recently discovered quantum LDPC code families with finite
rates the number of distinct classes of such extended defects is exponentially
large, corresponding to extensive ground state entropy of these codes.
  Here, the transition can be driven by the entropy of the extended defects, a
mechanism distinct from that in the local spin models where the number of
defect types (domain walls) is always finite.


title: Statistical model of intra-chromosome contact maps

abstract:
  The statistical properties of intra-chromosome maps obtained by a genome-wide
chromosome conformation capture method (Hi-C) are described in the framework of
the hierarchical crumpling model of heteropolymer chain with quenched disorder
in the primary sequence. We conjecture that the observed Hi-C maps are
statistical averages over many different ways of hierarchical genome folding,
and show that the existence of quenched primary structure coupled with
hierarchical folding can induce the observed fine structure of intra-chromosome
contact maps.


title:
Moments of normally distributed random matrices - Bijective explicit
  evaluation

abstract:
  This paper is devoted to the distribution of the eigenvalues of $XUYU^t$
where $X$ and $Y$ are given symmetric matrices and $U$ is a random real valued
square matrix of standard normal distribution. More specifically we look at its
moments, i.e. the mathematical expectation of the trace of $(XUYU^t)^n$ for
arbitrary integer $n$. Hanlon, Stanley, Stembridge (1992) showed that this
quantity can be expressed in terms of some generating series for the connection
coefficients of the double cosets of the hyperoctahedral group with the
eigenvalues of $X$ and $Y$ as indeterminate. We provide an explicit evaluation
of these series in terms of monomial symmetric functions. Our development
relies on an interpretation of the connection coefficients in terms of locally
orientable hypermaps and a new bijective construction between partitioned
locally orientable hypermaps and some decorated forests. As a corollary we
provide a simple explicit evaluation of the moments of $XUYU^*$ when $U$ is
complex valued and $X$ and $Y$ are given hermitian matrices.


title:
Numerical Methods for the Fractional Laplacian: a Finite
  Difference-quadrature Approach

abstract:
  The fractional Laplacian $(-\Delta)^{\alpha/2}$ is a non-local operator which
depends on the parameter $\alpha$ and recovers the usual Laplacian as $\alpha
\to 2$. A numerical method for the fractional Laplacian is proposed, based on
the singular integral representation for the operator. The method combines
finite difference with numerical quadrature, to obtain a discrete convolution
operator with positive weights. The accuracy of the method is shown to be
$O(h^{3-\alpha})$. Convergence of the method is proven. The treatment of far
field boundary conditions using an asymptotic approximation to the integral is
used to obtain an accurate method. Numerical experiments on known exact
solutions validate the predicted convergence rates. Computational examples
include exponentially and algebraically decaying solution with varying
regularity. The generalization to nonlinear equations involving the operator is
discussed: the obstacle problem for the fractional Laplacian is computed.


title:
Multi-point local height probabilities of the CSOS model within the
  algebraic Bethe Ansatz framework

abstract:
  We study the local height probabilities of the exactly solvable cyclic
solid-on-solid model within the algebraic Bethe Ansatz framework. We more
specifically consider multi-point local height probabilities at adjacent sites
on the lattice. We derive multiple integral representations for these
quantities at the thermodynamic limit, starting from finite-size expressions
for the corresponding multi-point matrix elements in the Bethe basis as sums of
determinants of elliptic functions.

categories: math-ph cond-mat.stat-mech math.MP nlin.SI


title:
A Proposal for the Characterization of Multi-Dimensional
  Inter-relationships of RDF Graphs Based on Set Theoretic Approach

abstract:
  In this paper a Set Theoretic approach has been reported for analyzing
inter-relationship between any numbers of RDF Graphs. An RDF Graph represents
triples in Resource Description Format of semantic web. So the identification
and characterization of criteria for inter-relationship of RDF Graphs shows a
new road in semantic search. Using set theoretic approach, a sound framing
criteria can be designed that examine whether two RDF Graphs are related and if
yes, how these relationships could be described with formal set theory. Along
with this, by introducing RDF Schema, the inter-relationship status is refined
into n-dimensional induced relationships.


title: Semiconductor solar superabsorber

abstract:
  Understanding the maximal enhancement of solar absorption in semiconductor
materials by light trapping promises the development of affordable solar cells.
However, the conventional Lambertian limit is only valid for idealized material
systems with weak absorption, and cannot hold for the typical semiconductor
materials used in solar cells due to the substantial absorption of these
materials. Herein we theoretically demonstrate the maximal solar absorption
enhancement for semiconductor materials and elucidate the general design
principle for light trapping structures to approach the theoretical maximum. By
following the principles, we design a practical light trapping structure that
can enable an ultrathin layer of semiconductor materials,for instance, 10 nm
thick a-Si, absorb > 90% sunlight above the bandgap. The design has active
materials with one order of magnitude less volume than any of the existing
solar light trapping designs in literature. This work points towards the
development of ultimate solar light trapping techniques.


title: Alcock-Paczynski cosmological test

abstract:
  In order to test the expansion of the universe and its geometry, we carry out
an Alcock & Paczynski cosmological test, that is, an evaluation of the ratio of
observed angular size to radial/redshift size. The main advantage of this test
is that it does not depend on the evolution of the galaxies, but only on the
geometry of the universe. However, the redshift distortions produced by the
peculiar velocities of the gravitational infall do also have an influence,
which should be separated from the cosmological effect. We derive the
anisotropic correlation function of sources in three surveys within the Sloan
Digital Sky Survey (SDSS): galaxies from SDSS-III/Baryon Oscillation
Spectroscopy Survey-Data Release 10 (BOSS-DR10), and QSOs from SDSS-II and
SDSS-III/BOSS-DR10. From these, we are able to disentangle the dynamic and
geometric distortions and thus derive the ratio of observed angular size to
radial/redshift size at different redshifts. We also add some other values
available in the literature. Then, we use the data to evaluate which
cosmological model fits them. We used six different models: concordance
Lambda-CDM, Einstein-de Sitter, open-Friedman Cosmology without dark energy,
flat quasi-steady state cosmology, a static universe with a linear Hubble law,
and a static universe with tired-light redshift. Only two of the six models
above fit the data of the Alcock & Paczynski test: concordance Lambda-CDM and
static universe with tired-light redshift; whereas the rest of them are
excluded at a >95% confidence level. If we assume that Lambda-CDM is the
correct one, the best fit with a free Omega_m is produced for
Omega_m=0.24^{+0.10}_{-0.07}.


title:
A study on the dependence of the dimensionless Brans-Dicke parameter on
  the scalar field and their time dependence

abstract:
  The present paper reports a study on the dimensionless parameter $\omega$ in
Brans-Dicke theory. Based on a particular choice of scale factor $a$, we have
investigated the signature flip of the deceleration parameter $q$ to see
whether the transition from decelerated to accelerated expansion of the
universe is achievable under this choice of scale factor. Restrictions on the
parameters obtained for this choice of scale factor have been subsequently used
for discussing the Brans-Dicke parameter for two choices of scalar fields
$\phi$. Moreover, analytical solutions for the Brans-Dicke parameter without
any assumption about the scalar field have been obtained from the modified
field equations through the choice of scale factor under consideration. Viable
models have been obtained by comparing the results with observations.


title:
Electronic structure at nanocontacts of surface passivated CdSe nanorods
  with gold clusters

abstract:
  We report the effects of variation in length on the electronic structure of
CdSe nanorods derived from atomic clusters and passivated by fictitious
hydrogen atoms. These nanorods are augmented by attaching gold clusters at both
the ends to form a nanodumbbell. The goal is to assess the changes at nanolevel
after formation of contacts with gold clusters serving as electrodes and
compare the results with experimental observations [PRL, 95, 056805 (2005)].
Calculations involving nanorods of length 4.6 Angstrom to 116.6 Angstrom are
performed using density functional theory implemented within plane-wave basis
set. The binding energy per atom saturates for nanorod of length 116.6
Angstrom. It is interesting to note that upon attaching gold clusters, the
nanorods shorter than 27 Angstrom develop metallicity by means of metal induced
gap states (MIGS). Longer nanorods exhibit a nanoscale Schottky barrier
emerging at the center. For these nanorods, interfacial region closest to the
gold electrodes shows a finite density of states in the gap due to MIGS, which
gradually decreases towards the center of the nanorod opening up a finite gap.
Bader charge analysis indicates localized charge transfer from metal to
semiconductor.


title: The Dark Matter Contribution to Galactic Diffuse Gamma Ray Emission

abstract:
  Observations of diffuse Galactic gamma ray emission (DGE) by the Fermi Large
Area Telescope (LAT) allow a detailed study of cosmic rays and the interstellar
medium. However, diffuse emission models of the inner Galaxy underpredict the
Fermi-LAT data at energies above a few GeV and hint at possible
non-astrophysical sources including dark matter (DM) annihilations or decays.
We present a study of the possible emission components from DM using the
high-resolution Via Lactea II N-body simulation of a Milky Way-sized DM halo.
We generate full-sky maps of DM annihilation and decay signals that include
modeling of the adiabatic contraction of the host density profile, Sommerfeld
enhanced DM annihilations, $p$-wave annihilations, and decaying DM. We compare
our results with the DGE models produced by the Fermi-LAT team over different
sky regions, including the Galactic center, high Galactic latitudes, and the
Galactic anti-center. This work provides possible templates to fit the
observational data that includes the contribution of the subhalo population to
DM gamma-ray emission, with the significance depending on the
annihilation/decay channels and the Galactic regions being considered.


title:
Diffuse Gamma Ray Background from Annihilating Dark Matter in Density
  Spikes around Supermassive Black Holes

abstract:
  Dark matter annihilation is proportional to the square of the density and is
especially efficient in places of highest concentration of dark matter, such as
dark matter spikes. The spikes are formed as a result of contraction of the
dark matter density profile caused by adiabatic growth of a supermassive black
hole at the center of the dark matter halo or subhalo. We revisit the relation
between the properties and mass functions of dark matter halos and spikes, and
propose alternative models for the density spikes that can potentially
contribute to the isotropic gamma-ray background.


title: Broken spacetime symmetries and elastic variables

abstract:
  We discuss spontaneous breaking of continuum symmetries, whose generators do
explicitly depend on the spacetime coordinates. We clarify the relation between
broken symmetries and elastic variables at both zero and finite temperatures,
and/or finite densities, and show the general counting rule that is
model-independently determined by the symmetry breaking pattern. We apply it to
three intriguing examples: rotational, conformal, and gauge symmetries.

categories: hep-th cond-mat.other cond-mat.stat-mech hep-ph


title: Higher Dimensional Effective Operators for Direct Dark Matter Detection

abstract:
  We discuss higher dimensional effective operators describing interactions
between fermionic dark matter and Standard Model particles. They are typically
suppressed compared to the leading order effective operators, which can explain
why no conclusive direct dark matter detection has been made so far. The
ultraviolet completions of the effective operators, which we systematically
study, require new particles. These particles can potentially have masses at
the TeV scale and can therefore be phenomenologically interesting for LHC
physics. We demonstrate that the lowest order options require Higgs-portal
interactions generated by dimension six operators. We list all possible
tree-level completions with extra fermions and scalars, and we discuss the LHC
phenomenology of a specific example with extra heavy fermion doublets.


title:
ULASJ1234+0907: The Reddest Type 1 Quasar at z=2.5 Revealed in the X-ray
  and Far Infra-red

abstract:
  We present Herschel and XMM-Newton observations of ULASJ1234+0907
($z=2.503$), the reddest broad-line Type 1 quasar currently known with
(i-K)>7.1. Herschel observations indicate that the quasar host is a
hyperluminous infrared galaxy (HyLIRG) with a total infrared luminosity of
log10(LIR/L0)=13.90+/-0.02. A greybody fit gives a dust temperature of
Td=60+/-3K assuming an emissivity index of beta=1.5, considerably higher than
in submillimeter bright galaxies observed at similar redshifts. The star
formation rate is estimated to be >2000M0/yr even accounting for a significant
contribution from an AGN component to the total infrared luminosity or
requiring that only the far infra-red luminosity is powered by a starburst.
XMM-Newton observations constrain the hard X-ray luminosity to be
L(2-10keV)=1.3e45 erg/s putting ULASJ1234+0907 among the brightest X-ray
quasars known. Through very deep optical and near infra-red imaging of the
field at sub-arcsecond seeing, we demonstrate that despite its extreme
luminosity, it is highly unlikely that ULASJ1234+0907 is being lensed. We
measure a neutral hydrogen column density of NH=9e21/cm^2 corresponding to AV~6
mags. The observed properties of ULASJ1234+0907 - high luminosity and Eddington
ratio, broad lines, moderate column densities and significant infra-red
emission from re-processed dust - are similar to those predicted by galaxy
formation simulations for the AGN blowout phase. The high Eddington ratio
combined with the presence of significant amounts of dust in this quasar, is
expected to drive strong outflows due to the effects of radiation pressure on
dust. We conclude that ULASJ1234+0907 is a prototype galaxy caught at the peak
epoch of galaxy formation, which is transitioning from a starburst to optical
quasar via a dusty quasar phase.


title: Dark Matter Induced Nucleon Decay: Model and Signatures

abstract:
  If dark matter (DM) carries anti-baryon number, a DM particle may annihilate
with a nucleon by flipping to anti-DM. Inspired by Hylogenesis models, we
introduce a single component DM model where DM is asymmetric and carries B and
L as -1/2. It can annihilate with a nucleon to an anti-lepton and an anti-DM at
leading order or with an additional meson at sub-leading order. Such signals
may be observed in proton decay experiments. If DM is captured in the Sun, the
DM induced nucleon decay can generate a large flux of anti-neutrinos, which
could be observed in neutrino experiments. Furthermore, the anti-DM particle in
the final state obtains a relatively large momentum (few hundred MeV), and
escapes the Sun. These fast-moving anti-DM particles could also induce
interesting signals in various underground experiments.


title:
iPTF13beo: The Double-Peaked Light Curve of a Type Ibn Supernova
  Discovered Shortly after Explosion

abstract:
  We present optical photometric and spectroscopic observations of the Type Ibn
(SN 2006jc-like) supernova iPTF13beo. Detected by the intermediate Palomar
Transient Factory ~3 hours after the estimated first light, iPTF13beo is the
youngest and the most distant (~430 Mpc) Type Ibn event ever observed. The
iPTF13beo light curve is consistent with light curves of other Type Ibn SNe and
with light curves of fast Type Ic events, but with a slightly faster rise-time
of two days. In addition, the iPTF13beo R-band light curve exhibits a
double-peak structure separated by ~9 days, not observed before in any Type Ibn
SN. A low-resolution spectrum taken during the iPTF13beo rising stage is
featureless, while a late-time spectrum obtained during the declining stage
exhibits narrow and intermediate-width He I and Si II features with FWHM ~
2000-5000 km/s and is remarkably similar to the prototypical SN Ibn 2006jc
spectrum. We suggest that our observations support a model of a massive star
exploding in a dense He-rich circumstellar medium (CSM). A shock breakout in a
CSM model requires an eruption releasing a total mass of ~0.1 Msun over a time
scale of couple of weeks prior to the SN explosion.


title: The Dark Z and Charged Higgs Decay

abstract:
  If there is an additional U(1) symmetry under which Standard Model particles
are singlets, then there can be mixing between the additional gauge boson and
the hypercharge gauge boson. This can lead to a very light, but weakly coupled
"dark" gauge boson, the $Z_d$, with a mass of O(1) GeV. If the $Z_d$ gets its
mass entirely from a Higgs singlet, it is called a dark photon; whereas if
there is a second Higgs doublet, it is called a dark Z. We look at charged
Higgs boson decays in the dark Z model. If the charged Higgs mass is between 90
GeV and 170 GeV, then its dominant two-body decays are $H^+ \rightarrow \tau\
\nu\ $ and $H^+ \rightarrow W^+ Z_d$. The former is suppressed by the small tau
mass-squared and by $1/\tan^2 \beta$, whereas the latter is suppressed by a
loop and a small mixing. We find that for much of the allowed parameter-space
$H^+ \rightarrow W^+ Z_d$ will dominate. Since $Z_d$ decays to a lepton pair
much of the time, this leads (using Drell-Yan pair production) to $pp
\rightarrow H^+H^- \rightarrow W^+ W^-$ plus two highly collimated "lepton
jets". Current bounds on lepton jets from ATLAS come close to constraining some
of parameter space, and a dedicated search using the 2012 data would
substantially improve the coverage.


title:
Explicit de Sitter Flux Vacua for Global String Models with Chiral
  Matter

abstract:
  We address the open question of performing an explicit stabilisation of all
closed string moduli (including dilaton, complex structure and Kaehler moduli)
in fluxed type IIB Calabi-Yau compactifications with chiral matter. Using toric
geometry we construct Calabi-Yau manifolds with del Pezzo singularities.
D-branes located at such singularities can support the Standard Model gauge
group and matter content. In order to control complex structure moduli
stabilisation we consider Calabi-Yau manifolds which exhibit a discrete
symmetry that reduces the effective number of complex structure moduli. We
calculate the corresponding periods in the symplectic basis of invariant
three-cycles and find explicit flux vacua for concrete examples. We compute the
values of the flux superpotential and the string coupling at these vacua.
Starting from these explicit complex structure solutions, we obtain AdS and dS
minima where the Kaehler moduli are stabilised by a mixture of D-terms,
non-perturbative and perturbative alpha'-corrections as in the LARGE Volume
Scenario. In the considered example the visible sector lives at a dP_6
singularity which can be higgsed to the phenomenologically interesting class of
models at the dP_3 singularity.


title: The stochastic nature of stellar population modelling

abstract:
  Since the early 1970s, stellar population modelling has been one of the basic
tools for understanding the physics of unresolved systems from observation of
their integrated light. Models allow us to relate the integrated spectra (or
colours) of a system with the evolutionary status of the stars of which it is
composed and hence to infer how the system has evolved from its formation to
its present stage. On average, observational data follow model predictions, but
with some scatter, so that systems with the same physical parameters (age,
metallicity, total mass) produce a variety of integrated spectra. The fewer the
stars in a system, the larger is the scatter. Such scatter is sometimes much
larger than the observational errors, reflecting its physical nature. This
situation has led to the development in recent years (especially since 2010) of
Monte Carlo models of stellar populations. Some authors have proposed that such
models are more realistic than state-of-the-art standard synthesis codes that
produce the mean of the distribution of Monte Carlo models.
  In this review, I show that these two modelling strategies are actually
equivalent, and that they are not in opposition to each other. They are just
different ways of describing the probability distributions intrinsic in the
very modelling of stellar populations. I show the advantages and limitations of
each strategy and how they complement each other. I also show the implications
of the probabilistic description of stellar populations in the application of
models to observational data obtained with high-resolution observational
facilities. Finally, I outline some possible developments that could be
realized in stellar population modelling in the near future.
  Open your window and take a look at the night sky on a clear night.....


title:
Spatially Resolved Velocity Maps of Halo Gas Around Two
  Intermediate-redshift Galaxies

abstract:
  Absorption-line spectroscopy of multiply-lensed QSOs near a known foreground
galaxy provides a unique opportunity to go beyond the traditional
one-dimensional application of QSO probes and establish a crude
three-dimensional (3D) map of halo gas around the galaxy that records the
line-of-sight velocity field at different locations in the gaseous halo. Two
intermediate-redshift galaxies are targeted in the field around the
quadruply-lensed QSO HE0435-1223 at redshift z=1.689, and absorption
spectroscopy along each of the lensed QSOs is carried out in the vicinities of
these galaxies. One galaxy is a typical, star-forming L* galaxy at z=0.4188 and
projected distance of rho=50 kpc from the lensing galaxy. The other is a
super-L* barred spiral at z=0.7818 and rho=33 kpc. Combining known orientations
of the quadruply-lensed QSO to the two foreground galaxies with the observed
MgII absorption profiles along individual QSO sightlines has for the first time
led to spatially resolved kinematics of tenuous halo gas on scales of 5-10 kpc
at z>0.2. A MgII absorber is detected in every sightline observed through the
halos of the two galaxies, and the recorded absorber strength is typical of
what is seen in previous close QSO--galaxy pair studies. While the
multi-sightline study confirms the unity covering fraction of MgII absorbing
gas at rho < 50 kpc from star-forming disks, the galaxies also present two
contrasting examples of complex halo gas kinematics. Different models,
including a rotating disk, collimated outflows, and gaseous streams from either
accretion or tidal/ram-pressure stripping, are considered for comparisons with
the absorption-line observations, and infalling streams/stripped gas of width
>~ 10 kpc are found to best describe the observed gas kinematics across
multiple sightlines.


title: Noise due to neutral modes in the v=2/3 fractional quantum Hall state

abstract:
  We theoretically study charge noise generated by excited neutral modes, which
impinge on the quantum point contact of a quantum Hall bar with filling
fraction v=2/3. The noise is computed for thermally excited neutral modes as
well as for biased neutral modes with dipole-fermion excitations. Within the
dipole-fermion picture, we show that the noise arising from two colliding modes
can be suppressed due to Pauli-blocking and be non-universal due to random edge
disorder, but becomes universal upon disorder-averaging. The ratio of noise due
to two colliding neutral modes and noise due to only one such mode is smaller
for dipole-fermions than for thermal excitations, thus providing evidence for
the different quantum statistics of the two types of excitations.


title: Tracking Data-Flow with Open Closure Types

abstract:
  Type systems hide data that is captured by function closures in function
types. In most cases this is a beneficial design that favors simplicity and
compositionality. However, some applications require explicit information about
the data that is captured in closures. This paper introduces open closure
types, that is, function types that are decorated with type contexts. They are
used to track data-flow from the environment into the function closure. A
simply-typed lambda calculus is used to study the properties of the type theory
of open closure types. A distinctive feature of this type theory is that an
open closure type of a function can vary in different type contexts. To present
an application of the type theory, it is shown that a type derivation
establishes a simple non-interference property in the sense of information-flow
theory. A publicly available prototype implementation of the system can be used
to experiment with type derivations for example programs.


title: Push-pull operators on the formal affine Demazure algebra and its dual

abstract:
  In the present paper we introduce and study the push pull operators on the
formal affine Demazure algebra and its dual. As an application we provide a
non-degenerate pairing on the dual of the formal affine Demazure algebra which
serves as an algebraic counterpart of the natural pairing on the T-equivariant
oriented cohomology of G/B induced by multiplication and push-forward to a
point.
  This paper can be viewed as the next step towards the `algebraization
program' for equivariant oriented cohomology theories started in
arXiv:0905.1341 and continued in arXiv:1208.4114 and arXiv:1209.1676; the
general idea being to match cohomology rings of algebraic varieties and
elements of classical interest in them (such as classes of Schubert varieties)
with algebraic and combinatorial objects that can be introduced in the spirit
of [Demazure, Invariants sym\'etriques entiers des groupes de Weyl et torsion,
Invent. Math. 21:287-301, 1973] and [Kostant, Kumar, The nil Hecke ring and
cohomology of G/P for a Kac-Moody group G, Advances in Math. 62:187-237, 1986].


title:
Sloshing in the LNG shipping industry: risk modelling through
  multivariate heavy-tail analysis

abstract:
  In the liquefied natural gas (LNG) shipping industry, the phenomenon of
sloshing can lead to the occurrence of very high pressures in the tanks of the
vessel. The issue of modelling or estimating the probability of the
simultaneous occurrence of such extremal pressures is now crucial from the risk
assessment point of view. In this paper, heavy-tail modelling, widely used as a
conservative approach to risk assessment and corresponding to a worst-case risk
analysis, is applied to the study of sloshing. Multivariate heavy-tailed
distributions are considered, with Sloshing pressures investigated by means of
small-scale replica tanks instrumented with d >1 sensors. When attempting to
fit such nonparametric statistical models, one naturally faces computational
issues inherent in the phenomenon of dimensionality. The primary purpose of
this article is to overcome this barrier by introducing a novel methodology.
For d-dimensional heavy-tailed distributions, the structure of extremal
dependence is entirely characterised by the angular measure, a positive measure
on the intersection of a sphere with the positive orthant in Rd. As d
increases, the mutual extremal dependence between variables becomes difficult
to assess. Based on a spectral clustering approach, we show here how a low
dimensional approximation to the angular measure may be found. The
nonparametric method proposed for model sloshing has been successfully applied
to pressure data. The parsimonious representation thus obtained proves to be
very convenient for the simulation of multivariate heavy-tailed distributions,
allowing for the implementation of Monte-Carlo simulation schemes in estimating
the probability of failure. Besides confirming its performance on artificial
data, the methodology has been implemented on a real data set specifically
collected for risk assessment of sloshing in the LNG shipping industry.


title:
Crystal isomorphisms in Fock spaces and Schensted correspondence in
  affine type A

abstract:
  We are interested in the structure of the crystal graph of level $l$ Fock
spaces representations of $\mathcal{U}_q (\widehat{\mathfrak{sl}_e})$. Since
the work of Shan [26], we know that this graph encodes the modular branching
rule for a corresponding cyclotomic rational Cherednik algebra. Besides, it
appears to be closely related to the Harish-Chandra branching graph for the
appropriate finite unitary group, according to [8]. In this paper, we make
explicit a particular isomorphism between connected components of the crystal
graphs of Fock spaces. This so-called "canonical" crystal isomorphism turns out
to be expressible only in terms of: - Schensted's classic bumping procedure, -
the cyclage isomorphism defined in [13], - a new crystal isomorphism, easy to
describe, acting on cylindric multipartitions. We explain how this can be seen
as an analogue of the bumping algorithm for affine type $A$. Moreover, it
yields a combinatorial characterisation of the vertices of any connected
component of the crystal of the Fock space.


title:
On products and powers of linear codes under componentwise
  multiplication

abstract:
  In this text we develop the formalism of products and powers of linear codes
under componentwise multiplication. As an expanded version of the author's talk
at AGCT-14, focus is put mostly on basic properties and descriptive statements
that could otherwise probably not fit in a regular research paper. On the other
hand, more advanced results and applications are only quickly mentioned with
references to the literature. We also point out a few open problems.
  Our presentation alternates between two points of view, which the theory
intertwines in an essential way: that of combinatorial coding, and that of
algebraic geometry.
  In appendices that can be read independently, we investigate topics in
multilinear algebra over finite fields, notably we establish a criterion for a
symmetric multilinear map to admit a symmetric algorithm, or equivalently, for
a symmetric tensor to decompose as a sum of elementary symmetric tensors.


title: Logic, Geometry And Probability Theory

abstract:
  We discuss the relationship between logic, geometry and probability theory
under the light of a novel approach to quantum probabilities which generalizes
the method developed by R. T. Cox to the quantum logical approach to physical
theories.


title: Du th\'eor\'eme de d\'ecomposition \'a la Puret\'e locale

abstract:
  A new proof of the decomposition theorem is established using a relation with
a version of the local purity theorem of Deligne and Gabber adapted to complex
algebraic varieties.


title: Suppressing CMB low multipoles with ISW effect

abstract:
  Recent results of Planck data reveal that the power in the low multipoles of
the CMB angular power spectrum, approximately up to $l=30$, is significantly
lower than the theoretically predicted in the best fit $\Lambda$CDM model. In
this paper we investigate the possibility of invoking the Integrated
Sachs-Wolfe (ISW) effect to explain this power deficit at low multipoles. The
ISW effect that originates from the late time expansion history of the universe
is rich in possibilities given the limited understanding of the origin of dark
energy (DE). It is a common understanding that the ISW effect adds to the power
at the low multipoles of the CMB angular power spectrum. In this paper we carry
out an analytic study to show that there are some expansion histories in which
the ISW effect, instead of adding power, provides negative contribution to the
power at low multipoles. Guided by the analytic study, we present examples of
the features required in the late time expansion history of the universe that
could explain the power deficiency through the ISW effect. We also show that an
ISW origin of power deficiency is consistent, at present, with other
cosmological observations that probe the expansion history such as distance
modulus, matter power spectrum and the evolution of cluster number count. We
also show that the ISW effect may be distinguished from power deficit
originating from features in the PPS using the measurements of the CMB
polarization spectrum at low multipoles expected from Planck. We conclude that
the power at low multipoles of the CMB anisotropy could well be closely linked
to Dark Energy puzzle in cosmology and this observation could be actually
pointing to richer phenomenology of DE beyond the cosmological constant
$\Lambda$. (abbreviated)


title: De la Puret\'e locale \`a la d\'ecomposition

abstract: The decomposition theorem is deduced from local purity.


title:
Chiral anomaly, dimensional reduction, and magnetoresistivity of Weyl
  and Dirac semimetals

abstract:
  By making use of the Kubo formula, we calculate the conductivity of Dirac and
Weyl semimetals in a magnetic field. We find that the longitudinal (along the
direction of the magnetic field) magnetoresistivity is negative at sufficiently
large magnetic fields for {\it both} Dirac and Weyl semimetals. The physical
reason of this phenomenon is intimately connected with the dimensional spatial
reduction $3 \to 1$ in the dynamics of the lowest Landau level. The
off-diagonal component of the transverse (with respect to the direction of the
magnetic field) conductivity in Weyl semimetals contains an anomalous
contribution directly proportional to the momentum space separation between the
Weyl nodes. This contribution comes exclusively from the lowest Landau level
and, as expected, is independent of the temperature, chemical potential, and
magnetic field. The other part of the off-diagonal conductivity is the same as
in Dirac semimetals and is connected with a nonzero density of charge carriers.
The signatures for experimental distinguishing Weyl semimetals from Dirac ones
through the measurements of conductivity are discussed.


title: Can LHCb Study Three Body Decays with Neutrals?

abstract:
  We present the first attempt to use a new method to measure CP violation in
Dalitz plots. This method is unbinned, model independent and has a greater
sensitivity to CP violating effects than binned methods. Preliminary studies
have been made using the three-body decays $D^0 \rightarrow K_\mathrm{S}^0 h^+
h^-$ and $D^0 \rightarrow h^+ h^- \pi^0$, which are especially challenging
since there is one neutral particle in each of the final states. An attempt to
visualise where CP violation occurs in Dalitz plots is also presented.


title: Astrophysical Constraints on Dense Matter in Neutron Stars

abstract:
  Ever since the discovery of neutron stars it has been realized that they
serve as probes of a physical regime that cannot be accessed in laboratories:
strongly degenerate matter at several times nuclear saturation density.
Existing nuclear theories diverge widely in their predictions about such
matter. It could be that the matter is primarily nucleons, but it is also
possible that exotic species such as hyperons, free quarks, condensates, or
strange matter may dominate this regime. Astronomical observations of cold
high-density matter are necessarily indirect, which means that we must rely on
measurements of quantities such as the masses and radii of neutron stars and
their surface effective temperatures as a function of age. Here we review the
current status of constraints from various methods and the prospects for future
improvements.


title:
A Hermite interpolatory subdivision scheme for $C^2$-quintics on the
  Powell-Sabin 12-split

abstract:
  In order to construct a $C^1$-quadratic spline over an arbitrary
triangulation, one can split each triangle into 12 subtriangles, resulting in a
finer triangulation known as the Powell-Sabin 12-split. It has been shown
previously that the corresponding spline surface can be plotted quickly by
means of a Hermite subdivision scheme. In this paper we introduce a nodal
macro-element on the 12-split for the space of quintic splines that are locally
$C^3$ and globally $C^2$. For quickly evaluating any such spline, a Hermite
subdivision scheme is derived, implemented, and tested in the computer algebra
system Sage. Using the available first derivatives for Phong shading, visually
appealing plots can be generated after just a couple of refinements.


title: Neutrino nuclear response and photo nuclear reaction

abstract:
  Photo nuclear reactions are shown to be used for studying neutrino/weak
nuclear responses involved in astro-neutrino nuclear interactions and double
beta decays. Charged current weak responses for ground and excited states are
studied by using photo nuclear reactions through isobaric analog states of
those states, while neutral current weak responses for excited states are
studied by using photo nuclear reactions through the excited states. The weak
interaction strengths are studied by measuring the cross sections of the photo
nuclear reactions, and the spin and parity of the state are studied by
measuring angular correlations of particles emitted from the photo nuclear
reactions. Medium-energy polarized photons obtained from laser photons
scattered off GeV electrons are very useful. Nuclear responses studied by photo
nuclear reactions are used to evaluate neutrino/weak nuclear responses, i.e.
nuclear beta and double beta matrix elements and neutrino nuclear interactions,
and to verify theoretical calculations for them.


title:
Top-k Query Answering in Datalog+/- Ontologies under Subjective Reports
  (Technical Report)

abstract:
  The use of preferences in query answering, both in traditional databases and
in ontology-based data access, has recently received much attention, due to its
many real-world applications. In this paper, we tackle the problem of top-k
query answering in Datalog+/- ontologies subject to the querying user's
preferences and a collection of (subjective) reports of other users. Here, each
report consists of scores for a list of features, its author's preferences
among the features, as well as other information. Theses pieces of information
of every report are then combined, along with the querying user's preferences
and his/her trust into each report, to rank the query results. We present two
alternative such rankings, along with algorithms for top-k (atomic) query
answering under these rankings. We also show that, under suitable assumptions,
these algorithms run in polynomial time in the data complexity. We finally
present more general reports, which are associated with sets of atoms rather
than single atoms.


title: Amplitude death in oscillator networks with variable-delay coupling

abstract:
  We study the conditions of amplitude death in a network of delay-coupled
limit cycle oscillators by including time-varying delay in the coupling and
self-feedback. By generalizing the master stability function formalism to
include variable-delay connections with high-frequency delay modulations (i.e.,
the distributed-delay limit), we analyze the regimes of amplitude death in a
ring network of Stuart-Landau oscillators and demonstrate the superiority of
the proposed method with respect to the constant delay case. The possibility of
stabilizing the steady state is restricted by the odd-number property of the
local node dynamics independently of the network topology and the coupling
parameters.


title: Domains of Injectivity for the Gross-Hopkins Period Map

abstract:
  We determine the domain of injectivity of the Gross-Hopkins Period map around
each points in the deformation space for a fixed formal module $\bar{F}$ of
height 2 that defined over a finite field. And then we will use this to
conclude some local analyticity result of the group action for the automorphism
group of $\bar{F}$ on the deformation space.


title: Vector correlator and scale determination in lattice QCD

abstract:
  We implement a proposal made in [arXiv:1107.4388] to determine the lattice
spacing by matching the lattice vector correlator at a reference distance scale
with the same correlator obtained by a dispersion relation based on the
$R$-ratio determined experimentally. We work with the isovector current,
requiring a separation of the isovector hadronic final states on the
phenomenological side. We also discuss the finite-size effect on the
correlator, which must be controlled in order for the method to be applicable.


title: Weak Parity

abstract:
  We study the query complexity of Weak Parity: the problem of computing the
parity of an n-bit input string, where one only has to succeed on a 1/2+eps
fraction of input strings, but must do so with high probability on those inputs
where one does succeed. It is well-known that n randomized queries and n/2
quantum queries are needed to compute parity on all inputs. But surprisingly,
we give a randomized algorithm for Weak Parity that makes only
O(n/log^0.246(1/eps)) queries, as well as a quantum algorithm that makes only
O(n/sqrt(log(1/eps))) queries. We also prove a lower bound of
Omega(n/log(1/eps)) in both cases; and using extremal combinatorics, prove
lower bounds of Omega(log n) in the randomized case and Omega(sqrt(log n)) in
the quantum case for any eps>0. We show that improving our lower bounds is
intimately related to two longstanding open problems about Boolean functions:
the Sensitivity Conjecture, and the relationships between query complexity and
polynomial degree.


title:
On the limiting spectral distribution for a large class of random
  matrices with correlated entries

abstract:
  For symmetric random matrices with correlated entries, which are functions of
independent random variables, we show that the asymptotic behavior of the
empirical eigenvalue distribution can be obtained by analyzing a Gaussian
matrix with the same covariance structure. This class contains both cases of
short and long range dependent random fields. The technique is based on a blend
of blocking procedure and Lindeberg's method. This method leads to a variety of
interesting asymptotic results for matrices with dependent entries, including
applications to linear processes as well as nonlinear Volterra-type processes
entries.


title: Bounds on Operator Dimensions in 2D Conformal Field Theories

abstract:
  We extend the work of Hellerman (arxiv:0902.2790) to derive an upper bound on
the conformal dimension $\Delta_2$ of the next-to-lowest nontrival primary
operator in unitary two-dimensional conformal field theories without chiral
primary operators. The bound we find is of the same form as found for
$\Delta_1$: $\Delta_2 \leq c_{tot}/12 + O(1)$. We find a similar bound on the
conformal dimension $\Delta_3$, and present a method for deriving bounds on
$\Delta_n$ for any $n$, under slightly modified assumptions. For asymptotically
large $c_{tot}$ and fixed $n$, we show that $\Delta_n \leq
\frac{c_{tot}}{12}+O(1)$. We conclude with a brief discussion of the
gravitational implications of these results.


title: A bound for the error term in the Brent-McMillan algorithm

abstract:
  The Brent-McMillan algorithm B3 (1980), when implemented with binary
splitting, is the fastest known algorithm for high-precision computation of
Euler's constant. However, no rigorous error bound for the algorithm has ever
been published. We provide such a bound and justify the empirical observations
of Brent and McMillan. We also give bounds on the error in the asymptotic
expansions of functions related to modified Bessel functions.


title: Dynamic Interference Management

abstract:
  A linear interference network is considered. Long-term fluctuations (shadow
fading) in the wireless channel can lead to any link being erased with
probability p. Each receiver is interested in one unique message that can be
available at M transmitters. In a cellular downlink scenario, the case where
M=1 reflects the cell association problem, and the case where M>1 reflects the
problem of setting up the backhaul links for Coordinated Multi-Point (CoMP)
transmission. In both cases, we analyze Degrees of Freedom (DoF) optimal
schemes for the case of no erasures, and propose new schemes with better
average DoF performance at high probabilities of erasure. For M=1, we
characterize the average per user DoF, and identify the optimal assignment of
messages to transmitters at each value of p. For general values of M, we show
that there is no strategy for assigning messages to transmitters in large
networks that is optimal for all values of p.


title: On Dynamic Mode Decomposition: Theory and Applications

abstract:
  Originally introduced in the fluid mechanics community, dynamic mode
decomposition (DMD) has emerged as a powerful tool for analyzing the dynamics
of nonlinear systems. However, existing DMD theory deals primarily with
sequential time series for which the measurement dimension is much larger than
the number of measurements taken. We present a theoretical framework in which
we define DMD as the eigendecomposition of an approximating linear operator.
This generalizes DMD to a larger class of datasets, including nonsequential
time series. We demonstrate the utility of this approach by presenting novel
sampling strategies that increase computational efficiency and mitigate the
effects of noise, respectively. We also introduce the concept of linear
consistency, which helps explain the potential pitfalls of applying DMD to
rank-deficient datasets, illustrating with examples. Such computations are not
considered in the existing literature, but can be understood using our more
general framework. In addition, we show that our theory strengthens the
connections between DMD and Koopman operator theory. It also establishes
connections between DMD and other techniques, including the eigensystem
realization algorithm (ERA), a system identification method, and linear inverse
modeling (LIM), a method from climate science. We show that under certain
conditions, DMD is equivalent to LIM.


title: Boosting the Basic Counting on Distributed Streams

abstract:
  We revisit the classic basic counting problem in the distributed streaming
model that was studied by Gibbons and Tirthapura (GT). In the solution for
maintaining an $(\epsilon,\delta)$-estimate, as what GT's method does, we make
the following new contributions: (1) For a bit stream of size $n$, where each
bit has a probability at least $\gamma$ to be 1, we exponentially reduced the
average total processing time from GT's $\Theta(n \log(1/\delta))$ to
$O((1/(\gamma\epsilon^2))(\log^2 n) \log(1/\delta))$, thus providing the first
sublinear-time streaming algorithm for this problem. (2) In addition to an
overall much faster processing speed, our method provides a new tradeoff that a
lower accuracy demand (a larger value for $\epsilon$) promises a faster
processing speed, whereas GT's processing speed is $\Theta(n \log(1/\delta))$
in any case and for any $\epsilon$. (3) The worst-case total time cost of our
method matches GT's $\Theta(n\log(1/\delta))$, which is necessary but rarely
occurs in our method. (4) The space usage overhead in our method is a lower
order term compared with GT's space usage and occurs only $O(\log n)$ times
during the stream processing and is too negligible to be detected by the
operating system in practice. We further validate these solid theoretical
results with experiments on both real-world and synthetic data, showing that
our method is faster than GT's by a factor of several to several thousands
depending on the stream size and accuracy demands, without any detectable space
usage overhead. Our method is based on a faster sampling technique that we
design for boosting GT's method and we believe this technique can be of other
interest.


title: On the K\"ahler-Ricci flows near the Mukai-Umemura 3-fold

abstract:
  In this short note, we show that given a special K\"ahler-Einstein
degeneration with bounded geometry, for any noncentral fiber, there exists a
K\"ahler-Ricci flow which converges to the K\"ahler-Einstein metric of the
central fiber. As an example, Tian's deformations \cite{Tian97} of the Mukai
3-fold admit K\"ahler-Ricci flows which converge to Donaldson's
K\"ahler-Einstein metric \cite{Don08} over the Mukai 3-fold.


title: Rare top decay and CP violation in THDM

abstract:
  We discuss the formalism of two Higgs doublet model type III with CP
violation from CP-even CP-odd mixing in the neutral Higgs bosons. The flavor
changing interactions among neutral Higgs bosons and fermions are presented at
tree level in this type of model. These assumptions allow the study rare top
decays mediated by neutral Higgs bosons, particularly we are interested in
$t\rightarrow c l^+l^-$. For this process we estimated upper bounds of the
branching ratios $\textrm{Br}(t\rightarrow c \tau^+\tau^-)$ of the order of
$10^{-9}\sim 10^{-7}$ for a neutral Higgs boson mass of 125 GeV and
$\tan\beta=1$, 1.5, 2, 2.5. For the case of $t\rightarrow c \tau^+\tau^-$ the
number of possible events is estimated from 1 to 10 events which could be
observed in future experiments at LHC with a luminosity of 300
$\textrm{fb}^{-1}$ and 14 GeV for the energy of the center of mass. Also we
estimate that the number of events for the process $t\rightarrow c l^+l^-$ in
different scenarios is of order of $2500$.


title:
Energy Efficient Spectrum Sensing and Handoff Strategies in Cognitive
  Radio Networks

abstract:
  The limited spectrum resources and dramatic growth of high data rate
communications have motivated opportunistic spectrum access using the promising
concept of cognitive radio networks. Although this concept has emerged
primarily to enhance spectrum utilization, the importance of energy consumption
poses new challenges, because energy efficiency and communication performance
can be at odds. In this paper, the existing approaches to energy efficiency
spectrum sensing and handoff are classified. The tradeoff between energy
consumption and throughput is established as function of the numerous design
parameters of cognitive radio networks, both in the case of local and of
cooperative spectrum sensing. It is argued that a number of important aspects
still needs to be researched, such as fairness, dynamic behavior, reactive and
proactive schemes for energy efficiency.


title: Infrared-Faint Radio Sources are at high redshifts

abstract:
  Context: Infrared-Faint Radio Sources (IFRS) are characterised by relatively
high radio flux densities and associated faint or even absent infrared and
optical counterparts. The resulting extremely high radio-to-infrared flux
density ratios up to several thousands were previously known only for
High-redshift Radio Galaxies (HzRGs), suggesting a link between the two classes
of object. Prior to this work, no redshift was known for any IFRS in the
Australia Telescope Large Area Survey (ATLAS) fields which would help to put
IFRS in the context of other classes of object, especially of HzRGs. Aims: This
work aims at measuring the first redshifts of IFRS in the ATLAS fields.
Further, we test the hypothesis that IFRS are similar to HzRGs, as
higher-redshift or dust-obscured versions of these massive galaxies. Methods: A
sample of IFRS was spectroscopically observed using the Focal Reducer and Low
Dispersion Spectrograph 2 (FORS2) at the Very Large Telescope (VLT). The data
were calibrated based on the Image Reduction and Analysis Facility (IRAF) and
redshifts extracted. This information was then used to calculate rest-frame
luminosities, and to perform the first spectral energy distribution modelling
of IFRS based on redshifts. Results: We found redshifts of 1.84, 2.13, and
2.76, for three IFRS, confirming the suggested high-redshift character of this
class of object. These redshifts as well as the resulting luminosities show
IFRS to be similar to HzRGs. We found further evidence that fainter IFRS are at
even higher redshifts. Conclusions: Considering the similarities between IFRS
and HzRGs substantiated in this work, the detection of IFRS, which have a
significantly higher sky density than HzRGs, increases the number of Active
Galactic Nuclei in the early universe and adds to the problems of explaining
the formation of supermassive black holes shortly after the Big Bang.


title:
Updating constraint preconditioners for KKT systems in quadratic
  programming via low-rank corrections

abstract:
  This work focuses on the iterative solution of sequences of KKT linear
systems arising in interior point methods applied to large convex quadratic
programming problems. This task is the computational core of the interior point
procedure and an efficient preconditioning strategy is crucial for the
efficiency of the overall method. Constraint preconditioners are very effective
in this context; nevertheless, their computation may be very expensive for
large-scale problems, and resorting to approximations of them may be
convenient. Here we propose a procedure for building inexact constraint
preconditioners by updating a "seed" constraint preconditioner computed for a
KKT matrix at a previous interior point iteration. These updates are obtained
through low-rank corrections of the Schur complement of the (1,1) block of the
seed preconditioner. The updated preconditioners are analyzed both
theoretically and computationally. The results obtained show that our updating
procedure, coupled with an adaptive strategy for determining whether to
reinitialize or update the preconditioner, can enhance the performance of
interior point methods on large problems.


title: Stochastic Optimization of Smooth Loss

abstract:
  In this paper, we first prove a high probability bound rather than an
expectation bound for stochastic optimization with smooth loss. Furthermore,
the existing analysis requires the knowledge of optimal classifier for tuning
the step size in order to achieve the desired bound. However, this information
is usually not accessible in advanced. We also propose a strategy to address
the limitation.


title: One-Class Classification: Taxonomy of Study and Review of Techniques

abstract:
  One-class classification (OCC) algorithms aim to build classification models
when the negative class is either absent, poorly sampled or not well defined.
This unique situation constrains the learning of efficient classifiers by
defining class boundary just with the knowledge of positive class. The OCC
problem has been considered and applied under many research themes, such as
outlier/novelty detection and concept learning. In this paper we present a
unified view of the general problem of OCC by presenting a taxonomy of study
for OCC problems, which is based on the availability of training data,
algorithms used and the application domains applied. We further delve into each
of the categories of the proposed taxonomy and present a comprehensive
literature review of the OCC algorithms, techniques and methodologies with a
focus on their significance, limitations and applications. We conclude our
paper by discussing some open research problems in the field of OCC and present
our vision for future research.


title: The Monge-Ampere constrained elastic theories of shallow shells

abstract:
  Motivated by the degree of smoothness of constrained embeddings of surfaces
in $\mathbb{R}^3$, and by the recent applications to the elasticity of shallow
shells, we rigorously derive the $\Gamma$-limit of 3-dimensional nonlinear
elastic energy of a shallow shell of thickness $h$, where the depth of the
shell scales like $h^\alpha$ and the applied forces scale like $h^{\alpha+2}$,
in the limit when $h\to 0$. The main analytical ingredients are two independent
results: a theorem on approximation of $W^{2,2}$ solutions of the
Monge-Amp\`ere equation by smooth solutions, and a theorem on the matching (in
other words, continuation) of second order isometries to exact isometries.


title: The Muon Anomalous Magnetic Moment in the Reduced Minimal 3-3-1 Model

abstract:
  We study the muon anomalous magnetic moment $(g-2)_{\mu}$ in the context of
the reduced minimal 3-3-1 model recently proposed in the literature. In
particular, its spectrum contains a doubly charged scalar ($H^{\pm \pm}$) and
gauge boson ($U^{\pm \pm}$), new singly charged vectors ($V^{\pm}$) and a
$Z^{\prime}$ boson, each of which might give a sizeable contribution to the
$(g-2)_{\mu}$. We compute the 1-loop contributions from all these new particles
to the $(g-2)_{\mu}$. We conclude that the doubly charged vector boson provides
the dominant contribution, and by comparing our results with the experimental
constraints we derive an expected value for the scale of $SU(3)_L\otimes
U(1)_N$ symmetry breaking $v_{\chi} \sim 2$ TeV. We also note that, if the
discrepancy in the anomalous moment is resolved in the future without this
model then the constraints will tighten to requiring $v_\chi > 2.7$ TeV with
current precision, and will entirely rule out the model if the expected
precision is achieved by the future experiment at Fermilab.


title: Dinucleon correlation of $^9$Li, $^{10}$Be, and $^{9,10}$C

abstract:
  We study the dinucleon (dineutron and diproton) correlation of the ground
states of $^9$Li, $^{10}$Be, and $^{9,10}$C. We assume an $\alpha+t$ core for
$^9$Li, an $\alpha+\alpha$ core for $^{10}$Be and $^{10}$C, and an
$\alpha+^3$He core for $^9$C, and investigate the effect of core structure
changes on the degree of dineutron formation and spatial expansion from the
core. For $^9$Li, $t$ cluster breaking in the core significantly enhances the
dineutron component inside the nuclei. Moreover, its component markedly depends
on the strength of the spin-orbit interaction since a dineutron is fragile and
dissociates readily due to the spin-orbit interaction. Compared with $^9$Li,
the dineutron of $^{10}$Be dissociates largely due to the stronger spin-orbit
attraction from the $\alpha+\alpha$ core than the $\alpha+t$ core. We also
investigate diproton features in $^{9,10}$C, the mirror nuclei of $^9$Li and
$^{10}$Be, respectively, and compare them with the dineutron features of $^9$Li
and $^{10}$Be. No qualitative difference is observed between diprotons and
dineutrons in the degree of formation at the surface, but a quantitative
difference may exist in the degree of dinucleon-size change far from the core.


title:
Stability of magnetic condensation and mass generation for confinement
  in SU(2) Yang-Mills theory

abstract:
  In the framework of the functional renormalization group, we reexamine the
stability of the Yang-Mills vacuum with a chromomagnetic condensation. We show
that the Nielsen-Olesen instability of the Savvidy vacuum with a homogeneous
chromomagnetic condensation disappears in the $SU(2)$ Yang-Mills theory. As a
physical mechanism for maintaining the stability even for the small infrared
cutoff, we argue that dynamical gluon mass generation occurs due to a
BRST-invariant vacuum condensate of mass dimension-two, which is related to
two-gluon bound states identified with glueballs. These results support the
dual superconductor picture for quark confinement.


title:
Energy Harvesting Broadband Communication Systems with Processing Energy
  Cost

abstract:
  Communication over a broadband fading channel powered by an energy harvesting
transmitter is studied. Assuming non-causal knowledge of energy/data arrivals
and channel gains, optimal transmission schemes are identified by taking into
account the energy cost of the processing circuitry as well as the transmission
energy. A constant processing cost for each active sub-channel is assumed.
Three different system objectives are considered: i) throughput maximization,
in which the total amount of transmitted data by a deadline is maximized for a
backlogged transmitter with a finite capacity battery; ii) energy maximization,
in which the remaining energy in an infinite capacity battery by a deadline is
maximized such that all the arriving data packets are delivered; iii)
transmission completion time minimization, in which the delivery time of all
the arriving data packets is minimized assuming infinite size battery. For each
objective, a convex optimization problem is formulated, the properties of the
optimal transmission policies are identified, and an algorithm which computes
an optimal transmission policy is proposed. Finally, based on the insights
gained from the offline optimizations, low-complexity online algorithms
performing close to the optimal dynamic programming solution for the throughput
and energy maximization problems are developed under the assumption that the
energy/data arrivals and channel states are known causally at the transmitter.


title:
Non-monotonic dependence of projection probabilities as a function of
  distinguishability

abstract:
  Typically, quantum superpositions, and thus measurement projections of
quantum states involving interference, decrease (or increase) monotonically as
a function of increased distinguishability. Distinguishability, in turn, can be
a consequence of decoherence, for example caused by the (simultaneous) loss of
excitation or due to inadequate mode matching (either deliberate or
indeliberate). It is known that for some cases of multi-photon interference,
non-monotonic decay of projection probabilities occurs, which has so far been
attributed to interference between four or more two photons. We show that such
a non-monotonic behaviour of projection probabilities is not unnatural, and can
also occur for single-photon and even semiclassical states. Thus, while the
effect traces its roots from indistinguishability and thus interference, the
states for which this can be observed do not need to have particular quantum
features.


title:
Evidence for the decay B0 --> omega omega and search for B0 --> omega
  phi

abstract:
  We describe searches for B meson decays to the charmless vector-vector final
states omega omega and omega phi with 471 x 10^6 B Bbar pairs produced in e+ e-
annihilation at sqrt(s) = 10.58 GeV using the BABAR detector at the PEP-II
collider at the SLAC National Accelerator Laboratory. We measure the branching
fraction B(B0 --> omega omega) = (1.2 +- 0.3 +0.3-0.2) x 10^-6, where the first
uncertainty is statistical and the second is systematic, corresponding to a
significance of 4.4 standard deviations. We also determine the upper limit B(B0
--> omega phi) < 0.7 x 10^-6 at 90% confidence level. These measurements
provide the first evidence for the decay B0 --> omega omega, and an improvement
of the upper limit for the decay B0 --> omega phi.


title:
Experimental demonstration of light capsule embracing super-sized
  darkness inside via anti-resolution

abstract:
  We theoretically and experimentally demonstrate the focusing of macroscopic
3D darkness surrounded by all light in free space. The object staying in the
darkness is similar to staying in an empty light capsule because light just
bypasses it by resorting to destructive interference. Its functionality of
controlling the direction of energy flux of light macroscopically is
fascinating, similar in some sense to the transformation-based cloaking effect.
Binary-optical system exhibiting anti-resolution (AR) is designed and
fabricated, by which electromagnetic energy flux avoids and bends smoothly
around a nearly perfect darkness region. AR remains an unexplored topic
hitherto, in contrast to the super-resolution for realizing high spatial
resolution. This novel scheme replies on smearing out the PSF and thus poses
less stringent limitations upon the object's size and position since the
created dark (zero-field) area reach 8 orders of magnitude larger than the
square of wavelength in size. It functions very well at arbitrarily polarized
beams in three dimensions, which is also frequency-scalable in the whole
electromagnetic spectrum.


title: Coordinate-space singularities of massless gauge theories

abstract:
  The structure of singularities in perturbative massless gauge theories is
investigated in coordinate space. The pinch singularities in coordinate-space
integrals occur at configurations of vertices which have a direct
interpretation in terms of physical scattering of particles in real space-time
in the same way as for the loop momenta in the case of momentum-space
singularities. In the analysis of vertex functions in coordinate space, the
well-known factorization into hard, soft, and jet functions is found. By
power-counting arguments, it is found that coordinate-space integrals of vertex
functions have logarithmic divergences at worst.


title: Uniform Spanning Forests and the bi-Laplacian Gaussian field

abstract:
  We construct a natural discrete random field on $\mathbb{Z}^{d}$, $d\geq 5$
that converges weakly to the bi-Laplacian Gaussian field in the scaling limit.
The construction is based on assigning i.i.d. Bernoulli random variables on
each component of the uniform spanning forest, thus defines an associated
random function. To our knowledge, this is the first natural discrete model
(besides the discrete bi-Laplacian Gaussian field) that converges to the
bi-Laplacian Gaussian field.


title: On the Secrecy Capacity of Block Fading Channels with a Hybrid Adversary

abstract:
  We consider a block fading wiretap channel, where a transmitter attempts to
send messages securely to a receiver in the presence of a hybrid half-duplex
adversary, which arbitrarily decides to either jam or eavesdrop the
transmitter-to- receiver channel. We provide bounds to the secrecy capacity for
various possibilities on receiver feedback and show special cases where the
bounds are tight. We show that, without any feedback from the receiver, the
secrecy capacity is zero if the transmitter-to-adversary channel stochastically
dominates the effective transmitter-to-receiver channel. However, the secrecy
capacity is non-zero even when the receiver is allowed to feed back only one
bit at the end of each block. Our novel achievable strategy improves the rates
proposed in the literature for the non-hybrid adversarial model. We also
analyze the effect of multiple adversaries and delay constraints on the secrecy
capacity. We show that our novel time sharing approach leads to positive
secrecy rates even under strict delay constraints.


title: Anomaly in the electronic structure of a BCS superconductor, ZrB(12)

abstract:
  We investigate the electronic structure of a complex conventional
superconductor, ZrB12 employing high resolution photoemission spectroscopy and
ab initio band structure calculations. The experimental valence band spectra
could be described reasonably well within the local density approximation.
Energy bands close to the Fermi level possess t_(2g) symmetry and the Fermi
level is found to be in the proximity of quantum fluctuation regime. The
spectral lineshape in the high resolution spectra is complex exhibiting
signature of a deviation from Fermi liquid behavior. A dip at the Fermi level
emerges above the superconducting transition temperature that gradually grows
with the decrease in temperature. The spectral simulation of the dip and
spectral lineshape based on a phenomenological self energy suggests a finite
electron pair lifetime and a pseudogap above the superconducting transition
temperature.


title:
Thermodynamic partition function from quantum theory for black hole
  horizons in loop quantum gravity

abstract:
  We establish the link between the thermodynamics and the quantum theory of
black hole horizons through the construction of the thermodynamic partition
function, partly based on some physically plausible arguments, by beginning
from the description of quantum states of the horizon, considering loop quantum
gravity(LQG) as the underlying theory. Although, the effective
`thermalized\rq{} form of the partition function has been previously used in
the literature to study the effect of thermal fluctuations of the black hole
horizon, nonetheless the direct link to any existing quantum theory (which is
here taken to be LQG), especially a derivation of the partition function from
the quantum states of the horizon, appears to be hitherto absent. This work is
an attempt to bridge this small, but essential, gap that appears to be present
between the existing literature of quantum theory and thermodynamics of black
holes. Further, it may be emphasized that this work is {\it only} concerned
with the {\it metric independent} approaches to black hole thermodynamics.


title:
An alternative proof of the extended Saalschutz summation theorem for
  the r+3Fr+2(1) series with applications

abstract:
  A simple proof of a new summation formula for a terminating r+3Fr+2(1)
hypergeometric series, representing an extension of Saalschutz's formula for a
3F2(1) series, is given for the case of r pairs of numeratorial and
denominatorial parameters differing by positive integers. Two applications of
this extended summation theorem are discussed. The first application extends
two identities given by Ramanujan and the second, which also employs a similar
extension of the Vandermonde-Chu summation theorem for the 2F1 series, extends
certain reduction formulas for the Kamp?e de F?eriet function of two variables
given by Exton and Cvijovi?c and Miller.


title:
On a representation of Humbert's double hypergeometric series in a
  series of Gauss's 2F1 function

abstract:
  In this paper, we aim to obtain a representation of Humbert's hy-
pergeometric function in a series of Gauss's function 2F1. A few interesting
results have also been deduced as special case of our main findings.


title: An explicit formula of hitting times for random walks on graphs

abstract:
  We prove an explicit formula of hitting times in terms of enumerations of
spanning trees for random walks on general connected graphs. We apply the
formula to improve Lawler's bound of hitting times for general graphs, prove a
sharp bound of hitting times for adjacent vertices and derive closed formulas
of hitting times for some special graphs.


title:
Distribution of the k-Multiple Point Range in the Closed Simple Random
  Walk I

abstract:
  The distribution of the number of points of the closed simple random walk,
visited a given number of times (the k-multiple point range) is analysed by a
graph based approach. A general expression for the moments is derived. In this
paper the joint generating function for dimension one is completely calculated
and analysed for large lengths.


title:
Coupled Orbit-Attitude Dynamics of High Area-to-Mass Ratio (HAMR)
  Objects: Influence of Solar Radiation Pressure, Earth's Shadow and the
  Visibility in Light Curves

abstract:
  The orbital and attitude dynamics of uncontrolled Earth orbiting objects are
perturbed by a variety of sources. In research, emphasis has been put on
operational space vehicles. Operational satellites typically have a relatively
compact shape, and hence, a low area-to-mass ratio (AMR), and are in most cases
actively or passively attitude stabilized. This enables one to treat the orbit
and attitude propagation as decoupled problems, and in many cases the attitude
dynamics can be neglected completely. The situation is different for space
debris objects, which are in an uncontrolled attitude state. Furthermore, the
assumption that a steady-state attitude motion can be averaged over data
reduction intervals may no longer be valid. Additionally, a subset of the
debris objects have significantly high area-to-mass ratio values, resulting in
highly perturbed orbits, e.g. by solar radiation pressure, even if a stable AMR
value is assumed. This assumption implies a steady-state attitude such that the
average cross-sectional area exposed to the sun is close to constant.
Time-varying solar radiation pressure accelerations due to attitude variations
will result in un-modeled errors in the state propagation. This work
investigates the evolution of the coupled attitude and orbit motion of HAMR
objects. Standardized pieces of multilayer insulation are simulated in near
geosynchronous orbits. It is assumed that the objects are rigid bodies and are
in uncontrolled attitude states. The integrated effects of the Earth
gravitational field and solar radiation pressure on the attitude motion are
investigated. The light curves that represent the observed brightness
variations over time in a specific viewing direction are extracted. A sensor
model is utilized to generate light curves with visibility constraints and
magnitude uncertainties as observed by a standard ground based telescope.


title: Universality in Gaussian Random Normal Matrices

abstract:
  We prove that for Gaussian random normal matrices the correlation function
has universal behavior.
  Using the technique of orthogonal polynomials and identities similar to the
Christoffel-Darboux formula, we find that in the limit, as the dimension of the
matrix tends to infinity, the density of eigenvalues converges to a constant
inside of an ellipse and to zero outside. The convergence holds locally
uniformly. At the boundary, in scaled coordinates holding the distance between
eigenvalues constant, we show that the density is falling off to zero like the
complementary error function. The convergence is uniform on the boundary.
Further we give an explicit expression for the the correlation function.


title:
Convergence of Fuzzy Tori and Quantum Tori for the quantum
  Gromov-Hausdorff Propinquity: an explicit approach

abstract:
  Quantum tori are limits of finite dimensional C*-algebras for the quantum
Gromov-Hausdorff propinquity, a metric defined by the author as a strengthening
of Rieffel's quantum Gromov-Hausdorff designed to retain the C*-algebraic
structure. In this paper, we propose a proof of the continuity of the family of
quantum and fuzzy tori which relies on explicit representations of the
C*-algebras rather than on more abstract arguments, in a manner which takes
full advantage of the notion of bridge defining the quantum propinquity.


title: Cross commutators of Rudin's submodules

abstract:
  Let $b(z) = \prod_{n=1}^\infty \frac{-\bar{\alpha}_n}{|\alpha_n|} \frac{z -
\alpha_n}{1 - \bar{\alpha}_n z}$, where $\sum_{n=1}^\infty (1 - |\alpha_n|)
<\infty$, be the Blaschke product with zeros at $\alpha_n \in \mathbb{D}
\setminus \{0\}$. Then $\cls = \vee_{n=1}^\infty \big(z^n H^2(\mathbb{D})\big)
\otimes \big(\prod_{k=n}^\infty \frac{-\bar{\alpha}_n}{|\alpha_n|} \frac{z -
\alpha_n}{1 - \bar{\alpha}_n z} H^2(\mathbb{D})\big)$ is a joint $(M_{z_1},
M_{z_2})$ invariant subspace of the Hardy space $H^2(\mathbb{D}^2) \cong
H^2(\mathbb{D}) \otimes H^2(\mathbb{D})$. This class of subspaces was
originally introduced by Rudin in the context of infinite cardinality of
generating sets of shift invariant subspaces of $H^2(\mathbb{D}^2)$.
  \noindent In this paper we prove that for a Rudin invariant subspace $\cls$
of $H^2(\mathbb{D}^2)$, the cross commutator $[(P_{\cls} M_{z_1}|_{\cls})^*,
M_{z_2}|_{\cls}] = (P_{\cls} M_{z_1} |_{\cls})^* (M_{z_2}|_{\cls}) -
(M_{z_2}|_{\cls}) (P_{\cls} M_{z_1}|_{\cls})^*$ is not compact. Consequently,
Rudin's invariant subspaces are both infinitely generated and not essentially
doubly commuting.


title: Kinematics of trajectories in classical mechanics

abstract:
  In this paper, we show how the study of kinematics of a family of
trajectories of a classical mechanical system may be unified within the
framework of analysis of geodesic flows in Riemannian geometry and Relativity.
After setting up the general formalism, we explore it through studies on
various one and two dimensional systems. Quantities like expansion, shear and
rotation (ESR), which are more familiar to the relativist, now re-appear while
studying such families of trajectories in configuration space, in very simple
mechanical systems. The convergence/divergence of a family of trajectories
during the course of time evolution, the shear and twist of the area enclosing
the family, and the focusing/defocusing of the trajectories within a finite
time are investigated analytically for these systems. The understanding of the
configuration space developed through such investigations is elaborated upon,
and possible future avenues are pointed out.


title: Improving Texture Categorization with Biologically Inspired Filtering

abstract:
  Within the domain of texture classification, a lot of effort has been spent
on local descriptors, leading to many powerful algorithms. However,
preprocessing techniques have received much less attention despite their
important potential for improving the overall classification performance. We
address this question by proposing a novel, simple, yet very powerful
biologically-inspired filtering (BF) which simulates the performance of human
retina. In the proposed approach, given a texture image, after applying a DoG
filter to detect the "edges", we first split the filtered image into two "maps"
alongside the sides of its edges. The feature extraction step is then carried
out on the two "maps" instead of the input image. Our algorithm has several
advantages such as simplicity, robustness to illumination and noise, and
discriminative power. Experimental results on three large texture databases
show that with an extremely low computational cost, the proposed method
improves significantly the performance of many texture classification systems,
notably in noisy environments. The source codes of the proposed algorithm can
be downloaded from https://sites.google.com/site/nsonvu/code.


title:
Unexpectedly robust protection from backscattering in the topological
  insulator Bi$_{1.5}$Sb$_{0.5}$Te$_{1.7}$Se$_{1.3}$

abstract:
  Electron scattering in the topological surface state (TSS) of the
bulk-insulating topological insulator Bi$_{1.5}$Sb$_{0.5}$Te$_{1.7}$Se$_{1.3}$
was studied using quasiparticle interference observed by scanning tunneling
microscopy. It was found that not only the 180$^{\circ}$ backscattering but
also a wide range of backscattering angles of 100$^{\circ}$--180$^{\circ}$ is
effectively prohibited in the TSS. This conclusion was obtained by comparing
the observed scattering vectors with the diameters of the constant-energy
contours of the TSS, which were measured for both occupied and unoccupied
states using time- and angle-resolved photoemission spectroscopy. The
unexpectedly robust protection from backscattering in the TSS is a good news
for applications, but it poses a challenge to the theoretical understanding of
the transport in the TSS.


title: Solitary wave of the Schrodinger lattice system with nonlinear hopping

abstract:
  This paper is concerned with the nonlinear Schrodinger lattice with
nonlinear hopping. Via variation approach and the Nehari manifold argument, we
obtain two types of solution: periodic ground state and localized ground state.
Moreover, we consider the convergence of periodic solutions to the solitary
wave.


title: Sequence-dependent folding landscapes of adenine riboswitch aptamers

abstract:
  Prediction of the functions of riboswitches requires a quantitative
description of the folding landscape so that the barriers and time scales for
the conformational change in the switching region in the aptamer can be
estimated. Using a combination of all atom molecular dynamics and
coarse-grained model simulations we studied the response of adenine (A) binding
add and pbuE A-riboswitches to mechanical force. The two riboswitches contain a
structurally similar three-way junction formed by three paired helices, P1, P2,
and P3, but carry out different functions. Using pulling simulations, with
structures generated in MD simulations, we show that after P1 rips the dominant
unfolding pathway in add A-riboswitch is the rupture of P2 followed by
unraveling of P3. In the pbuE A-riboswitch, after P1 unfolds P3 ruptures ahead
of P2. The order of unfolding of the helices, which is in accord with single
molecule pulling experiments, is determined by the relative stabilities of the
individual helices. Our results show that the stability of isolated helices
determines the order of assembly and response to force in these non-coding
regions. We use the simulated free energy profile for pbuE A-riboswitch to
estimate the time scale for allosteric switching, which shows that this
riboswitch is under kinetic control lending additional support to the
conclusion based on single molecule pulling experiments. A consequence of the
stability hypothesis is that a single point mutation (U28C) in the P2 helix of
the add A-riboswitch, which increases the stability of P2, would make the
folding landscapes of the two riboswitches similar. This prediction can be
tested in single molecule pulling experiments.


title: On an aggregation in birth-and-death stochastic dynamics

abstract:
  We consider birth and death stochastic dynamics of particle systems with
attractive interaction. The heuristic generator of the dynamics has a constant
birth rate and density dependent decreasing death rate. The corresponding
statistical dynamics is constructed. Using the Vlasov type scaling we derive
the limiting mesoscopic evolution and prove that this evolution propagates
chaos. We study a non-linear non-local kinetic equation for the first
correlation function (density of population). The existence of uniformly
bounded solutions as well as solutions growing inside of a bounded domain and
expanding in the space are shown. These solutions describe two regimes in the
mesoscopic system: regulation and aggregation.


title:
Topological Odd-Parity Superconductivity at Type-II 2D Van Hove
  Singularities

abstract:
  We study unconventional superconductivity induced by weak repulsive
interactions in 2D electronic systems at Van Hove singularity (VHS) where
density of states is logarithmically divergent. We define two types of VHS. For
systems at type-I VHS, weak repulsive interactions generically induce
unconventional singlet pairing. However and more interestingly, for type-II VHS
renormalization group (RG) analysis shows that weak repulsive interactions
favor triplet pairing (e.g. p-wave) when the Fermi surface is not sufficiently
nested. For type-II VHS systems respecting tetragonal symmetry, topological
superconductivity (either chiral p+ip pairing or time-reversal invariant $Z_2$
p+ip pairing) occurs generally. We shall also discuss relevance of our study to
materials including recently discovered superconductors LaO$_{1-x}$F$_x$BiS$_2$
which can be tuned to type-II VHS by doping.


title: Hop and HipHop : Multitier Web Orchestration

abstract:
  Rich applications merge classical computing, client-server concurrency,
web-based interfaces, and the complex time- and event-based reactive
programming found in embedded systems. To handle them, we extend the Hop web
programming platform by HipHop, a domain-specific language dedicated to
event-based process orchestration. Borrowing the synchronous reactive model of
Esterel, HipHop is based on synchronous concurrency and preemption primitives
that are known to be key components for the modular design of complex reactive
behaviors. HipHop departs from Esterel by its ability to handle the dynamicity
of Web applications, thanks to the reflexivity of Hop. Using a music player
example, we show how to modularly build a non-trivial Hop application using
HipHop orchestration code.


title:
Momentum distribution of a dilute unitary Bose gas with three-body
  losses

abstract:
  Using Boltzmann's equation, we study the effect of three-body losses on the
momentum distribution of a homogeneous unitary Bose gas in the dilute limit
where quantum correlations are negligible. We calculate the momentum
distribution of the gas and show that inelastic collisions are quantitatively
as important as a second order virial correction.


title: Uncertainty-induced quantum nonlocality

abstract:
  Based on the skew information, we present a quantity, uncertainty-induced
quantum nonlocality (UIN) to measure the quantum correlation. It can be
considered as the updated version of the original measurement-induced
nonlocality (MIN) preserving the good computability but eliminating the
non-contractivity problem. For 2 x d-dimensional state, it is shown that UIN
can be given by a closed form. In addition, we also investigate the maximal
uncertainty-induced nonlocality.


title:
Widths of weighted Sobolev classes on a domain with a peak: some
  limiting cases

abstract:
  Order estimates for Kolmogorov, Gelfand and linear widths of a weighted
Sobolev class on a domain with a peak in a weighted Lebesgue space are obtained
for some special weights.


title: One-way Phonon Isolation In Acoustic Waveguides

abstract:
  We present a method to achieve one-way mode isolation in acoustic waveguides
by considering spatio-temporal modulation of material properties. Mode
conversion between symmetric and antisymmetric shear horizontal (SH) modes of
an unbounded plate acoustic waveguide is demonstrated using this method.
Analytical and numerical evidence for the possibility of mode conversion is
presented. Possible experimental implementation and applications for on chip
signal isolation in MEMS devices are also suggested.


title:
Development of a higher order closed-form model for isotropic
  hyperelastic cylindrical body, including small vibration problem

abstract:
  We develop a new higher order closed-form model for the dynamics of a
hyperelastic isotropic 3D cylindrical body. We derive, for the first time, a
simple explicit expression for the fundamental frequency.


title:
Crossing the hurdle: the determinants of individual scientific
  performance

abstract:
  An original cross sectional dataset referring to a medium sized Italian
university is implemented in order to analyze the determinants of scientific
research production at individual level. The dataset includes 942 permanent
researchers of various scientific sectors for a three year time span (2008 -
2010). Three different indicators - based on the number of publications or
citations - are considered as response variables. The corresponding
distributions are highly skewed and display an excess of zero - valued
observations. In this setting, the goodness of fit of several Poisson mixture
regression models are explored by assuming an extensive set of explanatory
variables. As to the personal observable characteristics of the researchers,
the results emphasize the age effect and the gender productivity gap, as
previously documented by existing studies. Analogously, the analysis confirm
that productivity is strongly affected by the publication and citation
practices adopted in different scientific disciplines. The empirical evidence
on the connection between teaching and research activities suggests that no
univocal substitution or complementarity thesis can be claimed: a major
teaching load does not affect the odds to be a non-active researcher and does
not significantly reduce the number of publications for active researchers. In
addition, new evidence emerges on the effect of researchers administrative
tasks, which seem to be negatively related with researcher's productivity, and
on the composition of departments. Researchers' productivity is apparently
enhanced by operating in department filled with more administrative and
technical staff, and it is not significantly affected by the composition of the
department in terms of senior or junior researchers.


title: On the nature of V2282 Sgr

abstract:
  The star V2282 Sgr is positionally consistent with a strong Chandra X-ray and
a Spitzer/IRAC MIR source. We derived its long term $I$-band light curve from
the photographic archives of the Asiago and Catania Observatories, covering the
years from 1965 to 1984. CCD $R_C$ photometry in Summer 2009 was re-analyzed.
Optical spectra were secured at Loiano Observatory in 2011 and 2012. J H K
photometry, obtained from several experiments in different epochs was compared
and the Spitzer images were re-analyzed.
  V2282 Sgr was found to be irregular variable in all wavelengths.
Spectroscopically, it shows strong emission features (H Balmer lines, [NII]6584
AA and [OIII]5007/4959 AA) while the Na D doublet is very strong, indicating a
circumstellar envelope. A single thermal energy distribution cannot reproduce
the observed SED, while it can be explained as the sum of a G-type star plus a
variable circumstellar disc, which mimics a class 0/I object. Most likely,
V2282 Sgr is a 1-2 $M_{sun}$ mass pre main sequence star with an accretion
disk.


title: A Framework for Genetic Algorithms Based on Hadoop

abstract:
  Genetic Algorithms (GAs) are powerful metaheuristic techniques mostly used in
many real-world applications. The sequential execution of GAs requires
considerable computational power both in time and resources. Nevertheless, GAs
are naturally parallel and accessing a parallel platform such as Cloud is easy
and cheap. Apache Hadoop is one of the common services that can be used for
parallel applications. However, using Hadoop to develop a parallel version of
GAs is not simple without facing its inner workings. Even though some
sequential frameworks for GAs already exist, there is no framework supporting
the development of GA applications that can be executed in parallel. In this
paper is described a framework for parallel GAs on the Hadoop platform,
following the paradigm of MapReduce. The main purpose of this framework is to
allow the user to focus on the aspects of GA that are specific to the problem
to be addressed, being sure that this task is going to be correctly executed on
the Cloud with a good performance. The framework has been also exploited to
develop an application for Feature Subset Selection problem. A preliminary
analysis of the performance of the developed GA application has been performed
using three datasets and shown very promising performance.


title:
Energy spectra of Hartmann and ring-shaped oscillator potentials using
  the quantum Hamilton-Jacobi formalism

abstract:
  In the present work, we apply the exact quantization condition, introduced
within the framework of Padgett and Leacock's quantum Hamilton-Jacobi
formalism, to angular and radial quantum action variables in the context of the
Hartmann and the ring-shaped oscillator potentials which are separable and non
central. The energy spectra of the two systems are exactly obtained.


title: Extremal Surfaces And Entanglement Entropy

abstract:
  We have obtained the equation of the extremal hypersurface by considering the
Jacobson-Myers functional and computed the entanglement entropy. In this
context, we show that the higher derivative corrected extremal surfaces can not
penetrate the horizon. Also, we have studied the entanglement temperature and
entanglement entropy for low excited states for such higher derivative theories
when the entangling region is of the strip type.


title: First order formalism for the holographic duals of defect CFTs

abstract:
  We develop a first order formalism for constructing gravitational duals of
conformal defects in a bottom up approach. Similarly as for the flat domain
walls a single function specifies the solution completely. Using this formalism
we construct several novel families of analytic solutions dual to conformal
interfaces and boundaries. As a sample application we study the boundary OPE
and entanglement entropy for one of the found defects.