title:
A Method for Exploring Systematics Due to Galactic Interstellar Emission
  Modeling: Application to the Fermi LAT SNR Catalog

abstract:
  Galactic interstellar emission contributes substantially to Fermi LAT
observations in the Galactic plane, where the majority of Supernova Remnants
(SNRs) are located. We have developed a method to explore some systematic
effects on SNRs' properties caused by interstellar emission modeling. We
created eight alternative Galactic interstellar models by varying a few input
parameters to GALPROP, namely the height of the cosmic ray propagation halo,
cosmic ray source distribution in the Galaxy, and atomic hydrogen spin
temperature. We have analyzed eight representative candidate SNRs chosen to
encompass a range of Galactic locations, extensions, and spectral properties
using the eight different interstellar emission models. The models were fitted
to the LAT data with free independent normalization coefficients for the
various components of the model along the line of sight in each region of
interest. We will discuss the results and compare them with those obtained with
the official LAT interstellar emission model.


title:
The Plateau de Bure + 30m Arcsecond Whirlpool Survey reveals a thick
  disk of diffuse molecular gas in the M51 galaxy

abstract:
  We present the data of the Plateau de Bure Arcsecond Whirlpool Survey (PAWS),
a high spatial and spectral resolution 12CO(1-0) line survey of the inner 10 x
6 kpc of the M51 system, and the first wide-field imaging of molecular gas in a
star-forming spiral galaxy with resolution matched to the typical size of Giant
Molecular Clouds (40 pc). We describe the observation, reduction, and
combination of the Plateau de Bure Interferometer (PdBI) and IRAM-30m "short
spacing" data. The final data cube attains 1.1"-resolution over the 270" x 170"
field of view, with sensitivity to all spatial scales from the combination of
PdBI and IRAM-30m data, and brightness sensitivity of 0.4 K (1 sigma) in each 5
km/s-wide channel map. We find a CO-luminosity of 9.10^8 K km/s pc^2,
corresponding to a molecular gas mass of 4.10^9 Msol for a standard CO-to-H2
conversion factor. Unexpectedly, we find that a large fraction, (50 +/- 10)%,
of this emission arises mostly from spatial scales larger than 36" or about 1.3
kpc. Through a series of tests, we demonstrate that this extended emission does
not result from a processing artifact. We discuss its origin in light of the
stellar component, the 12CO/13CO ratio, and the difference between the
kinematics and structure of the PdBI-only and hybrid synthesis (PdBI +
IRAM-30m) images. The extended emission is consistent with a thick, diffuse
disk of molecular gas with a typical scale height of about 200 pc,
substructured in unresolved filaments which fills about 0.1% of the volume.


title:
Interest-Rate Modelling in Collateralized Markets: Multiple curves,
  credit-liquidity effects, CCPs

abstract:
  The market practice of extrapolating different term structures from different
instruments lacks a rigorous justification in terms of cash flows structure and
market observables. In this paper, we integrate our previous consistent theory
for pricing under credit, collateral and funding risks into term structure
modelling, integrating the origination of different term structures with such
effects. Under a number of assumptions on collateralization, wrong-way risk,
gap risk, credit valuation adjustments and funding effects, including the
treasury operational model, and via an immersion hypothesis, we are able to
derive a synthetic master equation for the multiple term structure dynamics
that integrates multiple curves with credit/funding adjustments.


title:
Construction and analysis of higher order Galerkin variational
  integrators

abstract:
  In this work we derive and analyze variational integrators of higher order
for the structure-preserving simulation of mechanical systems. The construction
is based on a space of polynomials together with Gauss and Lobatto quadrature
rules to approximate the relevant integrals in the variational principle. The
use of higher order schemes increases the accuracy of the discrete solution and
thereby decrease the computational cost while the preservation properties of
the scheme are still guaranteed. The order of convergence of the resulting
variational integrators are investigated numerically and it is discussed which
combination of space of polynomials and quadrature rules provide optimal
convergence rates. For particular integrators the order can be increased
compared to the Galerkin variational integrators previously introduced in
Marsden & West 2001. Furthermore, linear stability properties, time
reversibility, structure-preserving properties as well as efficiency for the
constructed variational integrators are investigated and demonstrated by
numerical examples.


title:
A sensitivity analysis of the WFCAM Transit Survey for short-period
  giant planets around M dwarfs

abstract:
  The WFCAM Transit Survey (WTS) is a near-infrared transit survey running on
the United Kingdom Infrared Telescope (UKIRT), designed to discover planets
around M dwarfs. The WTS acts as a poor-seeing backup programme for the
telescope, and represents the first dedicated wide-field near-infrared transit
survey. In this paper we describe the observing strategy of the WTS and the
processing of the data to generate lightcurves. We describe the basic
properties of our photometric data, and measure our sensitivity based on 950
observations. We show that the photometry reaches a precision of ~4mmag for the
brightest unsaturated stars in lightcurves spanning almost 3 years. Optical
(SDSS griz) and near-infrared (UKIRT ZYJHK) photometry is used to classify the
target sample of 4600 M dwarfs with J magnitudes in the range 11-17. Most have
spectral-types in the range M0-M2. We conduct Monte Carlo transit injection and
detection simulations for short period (<10 day) Jupiter- and Neptune-sized
planets to characterize the sensitivity of the survey. We investigate the
recovery rate as a function of period and magnitude for 4 hypothetical
star-planet cases: M0-2+Jupiter, M2-4+Jupiter, M0-2+Neptune, M2-4+Neptune. We
find that the WTS lightcurves are very sensitive to the presence of
Jupiter-sized short-period transiting planets around M dwarfs. Hot Neptunes
produce a much weaker signal and suffer a correspondingly smaller recovery
fraction. Neptunes can only be reliably recovered with the correct period
around the rather small sample (~100) of the latest M dwarfs (M4-M9) in the
WTS. The non-detection of a hot-Jupiter around an M dwarf by the WFCAM Transit
Survey allows us to place an upper limit of 1.7-2.0 per cent (at 95 per cent
confidence) on the planet occurrence rate.


title:
Revisiting the hardening of the cosmic-ray energy spectrum at TeV
  energies

abstract:
  Measurements of cosmic rays by experiments such as ATIC, CREAM, and PAMELA
indicate a hardening of the cosmic-ray energy spectrum at TeV energies. In our
recent work (Thoudam & H\"orandel 2012a), we showed that the hardening can be
due to the effect of nearby supernova remnants. We showed it for the case of
proton and helium. In this paper, we present an improved and detailed version
of our previous work, and extend our study to heavier cosmic-ray species such
as boron, carbon, oxygen, and iron nuclei. Unlike our previous study, the
present work involves a detailed calculation of the background cosmic rays and
follows a consistent treatment of cosmic-ray source parameters between the
background and the nearby components. Moreover, we also present a detailed
comparison of our results on the secondary-to-primary ratios, secondary
spectra, and the diffuse gamma-ray spectrum with the results expected from
other existing models, which can be checked by future measurements at high
energies.


title:
Calculation of Confined Phonon Spectrum in Narrow Silicon Nanowires
  using the Valence Force Field Method

abstract:
  We study the effect of confinement on the phonon properties of ultra-narrow
silicon nanowires of side sizes of 1-10nm . We use the modified valence force
field method to compute the phononic dispersion, and extract the density of
states, the transmission function, the sound velocity, the ballistic thermal
conductance and boundary scattering-limited diffusive thermal conductivity. We
find that the phononic dispersion and the ballistic thermal conductance are
functions of the geometrical features of the structures, i.e. the transport
orientation and confinement dimension. The phonon group velocity and thermal
conductance can vary by a factor of two depending on the geometrical features
of the channel. The <110> nanowire has the highest group velocity and thermal
conductance, whereas the <111> the lowest. The <111> channel is thus the most
suitable orientation for thermoelectric devices based on Si nanowires since it
also has a large power factor. Our findings could be useful in the thermal
transport design of silicon-based devices for thermoelectric and thermal
management applications.


title: Computing Datalog Rewritings beyond Horn Ontologies

abstract:
  Rewriting-based approaches for answering queries over an OWL 2 DL ontology
have so far been developed mainly for Horn fragments of OWL 2 DL. In this
paper, we study the possibilities of answering queries over non-Horn ontologies
using datalog rewritings. We prove that this is impossible in general even for
very simple ontology languages, and even if PTIME = NP. Furthermore, we present
a resolution-based procedure for $\SHI$ ontologies that, in case it terminates,
produces a datalog rewriting of the ontology. Our procedure necessarily
terminates on DL-Lite_{bool}^H ontologies---an extension of OWL 2 QL with
transitive roles and Boolean connectives.


title:
On the effect of rearrangement on complex interpolation for families of
  Banach spaces

abstract:
  We give a new proof to show that the complex interpolation for families of
Banach spaces is not stable under rearrangement of the given family on the
boundary, although, by a result due to Coifman, Cwikel, Rochberg, Sagher and
Weiss, it is stable when the latter family takes only 2 values. The
non-stability for families taking 3 values was first obtained by Cwikel and
Janson. Our method links this problem to the theory of matrix-valued Toeplitz
operator and we are able to characterize all the transformations on $\T$ that
are invariant for complex interpolation at 0, they are precisely the
origin-preserving inner functions.


title: Building relativized representations using games

abstract:
  We prove the celebrated representation theorem of Andreka-Resek-Thompson,
together with its polyadic analogue by Ferenczi, using games as introduced in
algebraic logic by Hirsch and Hodkinson. We also show that atomic algebras are
completely representable and that all such varieties of relativized set
algebras have the strong amalgmation property.


title:
Homogeneous Weights of Matrix Product Codes over Finite Principal Ideal
  Rings

abstract:
  In this paper, the homogeneous weights of matrix product codes over finite
principal ideal rings are studied and a lower bound for the minimum homogeneous
weights of such matrix product codes is obtained.


title:
Symplectic twistor operator on ${\mathbb R}^{2n}$ and the
  Segal-Shale-Weil representation

abstract:
  The aim of our article is the study of solution space of the symplectic
twistor operator $T_s$ in symplectic spin geometry on standard symplectic space
$({\mathbb R}^{2n},\omega)$, which is the symplectic analogue of the twistor
operator in (pseudo)Riemannian spin geometry. In particular, we observe a
substantial difference between the case $n=1$ of real dimension 2 and the case
of ${\mathbb R}^{2n}$, $n>1$. For $n>1$, the solution space of $T_s$ is
isomorphic to the Segal-Shale-Weil representation.


title:
Effect of fluorinated diamond surface on charge state of
  nitrogen-vacancy centers

abstract:
  We investigated the effect of fluorine-terminated diamond surface on the
charged state of shallow nitrogen vacancy defect centers (NVs). Fluorination is
achieved with CF4 plasma and the surface chemistry is confirmed with x-ray
photoemission spectroscopy. Photoluminescence of these ensemble NVs reveal that
fluorine-treated surfaces lead to a higher negatively charged nitrogen vacancy
(NV-) population than oxygen-terminated surfaces. Using surface chemistry to
control NV charges, in particular increasing the density of NV- centers, is an
important step towards improving the optical and spin properties of NVs for
quantum information processing and magnetic sensing.


title:
Restoration of Images Corrupted by Impulse Noise and Mixed Gaussian
  Impulse Noise using Blind Inpainting

abstract:
  This article studies the problem of image restoration of observed images
corrupted by impulse noise and mixed Gaussian impulse noise. Since the pixels
damaged by impulse noise contain no information about the true image, how to
find this set correctly is a very important problem. We propose two methods
based on blind inpainting and $\ell_0$ minimization that can simultaneously
find the damaged pixels and restore the image. By iteratively restoring the
image and updating the set of damaged pixels, these methods have better
performance than other methods, as shown in the experiments. In addition, we
provide convergence analysis for these methods, these algorithms will converge
to coordinatewise minimum points. In addition, they will converge to local
minimum points (or with probability one) with some modifications in the
algorithms.


title: Fragmentation dynamics of DNA sequence duplications

abstract:
  Motivated by empirical observations of algebraic duplicated sequence length
distributions in a broad range of natural genomes, we analytically formulate
and solve a class of simple discrete duplication/substitution models that
generate steady-states sharing this property. Continuum equations are derived
for arbitrary time-independent duplication length source distribution, a limit
that we show can be mapped directly onto certain fragmentation models that have
been intensively studied by physicists in recent years. Quantitative agreement
with simulation is demonstrated. These models account for the algebraic form
and exponent of naturally occuring duplication length distributions without the
need for fine-tuning of parameters.


title: Colloidal gelation with variable attraction energy

abstract:
  We present an approximation scheme to the master kinetic equations for
aggregation and gelation with thermal breakup in colloidal systems with
variable attraction energy. With the cluster fractal dimension $d_{f}$ as the
only phenomenological parameter, rich physical behavior is predicted. The
viscosity, the gelation time and the cluster size are predicted in closed form
analytically as a function of time, initial volume fraction and attraction
energy by combining the reversible clustering kinetics with an approximate
hydrodynamic model. The fractal dimension $d_{f}$ modulates the time evolution
of cluster size, lag time and gelation time and of the viscosity. The gelation
transition is strongly nonequilibrium and time-dependent in the unstable region
of the state diagram of colloids where the association rate is larger than the
dissociation rate. Only upon approaching conditions where the initial
association and the dissociation rates are comparable for all species (which is
a condition for the detailed balance to be satisfied) aggregation can occur
with $d_{f}=3$. In this limit, homogeneous nucleation followed by
Lifshitz-Slyozov coarsening is recovered. In this limited region of the state
diagram the macroscopic gelation process is likely to be driven by large
spontaneous fluctuations associated with spinodal decomposition.


title: RITA: An Index-Tuning Advisor for Replicated Databases

abstract:
  Given a replicated database, a divergent design tunes the indexes in each
replica differently in order to specialize it for a specific subset of the
workload. This specialization brings significant performance gains compared to
the common practice of having the same indexes in all replicas, but requires
the development of new tuning tools for database administrators. In this paper
we introduce RITA (Replication-aware Index Tuning Advisor), a novel
divergent-tuning advisor that offers several essential features not found in
existing tools: it generates robust divergent designs that allow the system to
adapt gracefully to replica failures; it computes designs that spread the load
evenly among specialized replicas, both during normal operation and when
replicas fail; it monitors the workload online in order to detect changes that
require a recomputation of the divergent design; and, it offers suggestions to
elastically reconfigure the system (by adding/removing replicas or
adding/dropping indexes) to respond to workload changes. The key technical
innovation behind RITA is showing that the problem of selecting an optimal
design can be formulated as a Binary Integer Program (BIP). The BIP has a
relatively small number of variables, which makes it feasible to solve it
efficiently using any off-the-shelf linear-optimization software. Experimental
results demonstrate that RITA computes better divergent designs compared to
existing tools, offers more features, and has fast execution times.


title:
Rotational/ Compressional nature of the Magnetopause: application of the
  BV technique on a magnetopause case study

abstract:
  The magnetopause boundary implies two kinds of variations: a density/
temperature gradient and a magnetic field rotation. These two kinds are always
observed in a close vicinity of each other, if not inseparably mixed. We
present a case study from the Cluster data where the two are clearly separated
and investigate the natures of both layers. We evidence that the first one is a
slow shock while the second is a rotational discontinuity. The interaction
between these two kinds of discontinuities is then studied with the help of
1,5-D magnetohydrodynamics simulations. The comparison with the data is quite
positive and leads to think that most of the generic properties of the
magnetopause may be interpreted in this sense.

categories: astro-ph.EP physics.geo-ph physics.plasm-ph physics.space-ph


title: Universality in the full counting statistics of trapped fermions

abstract:
  We study the distribution of particle number in extended subsystems of a
one-dimensional non-interacting Fermi gas confined in a potential well at zero
temperature. Universal features are identified in the scaled bulk and edge
regions of the trapped gas where the full counting statistics are given by the
corresponding limits of the eigenvalue statistics in Gaussian unitary random
matrix ensembles. The universal limiting behavior is confirmed by the bulk and
edge scaling of the particle number fluctuations and the entanglement entropy.


title:
Experimental status of particle and astroparticle searches for
  supersymmetry

abstract:
  An overview of supersymmetry searches is presented, covering collider
experiments, direct and indirect searches for supersymmetric dark matter.
Recent LHC experimental results are reviewed, and the constraints from B-meson
decays are reported. Implications for supersymmetry of the latest direct and
indirect searches are thoroughly discussed. The focus is on the complementarity
of the various probes -- particle and astrophysical -- for constraining
Supersymmetry.


title:
Distributional cosmological quantities solve the paradox of soft
  singularity crossing

abstract:
  Both dark energy models and modified gravity theories could lead to
cosmological evolutions different from either the recollapse into a Big Crunch
or exponential de Sitter expansion. The newly arising singularities may
represent true endpoints of the evolution or allow for the extension of
geodesics through them. In the latter case the components of the Riemann tensor
representing tidal forces diverge. Sudden Future Singularities (SFS) occur at
finite time, finite scale factor and finite Hubble parameter, only the
deceleration parameter diverges. The energy density of a perfect fluid is
regular and its pressure diverges at the SFS. A particular SFS, the Big Brake
occurs when the energy density vanishes and the expansion arrives at a full
stop at the singularity. Such scenarios are generated by either a particular
scalar field (the tachyon field) or the anti-Chaplygin gas. By adding matter to
these models, an unwanted feature appears: at the finite scale factor of the
SFS the energy density of matter remains finite, implying (for a spatially flat
universe) a finite Hubble parameter, hence finite expansion rate, rather then
full stop. The universe would further expand through the singularity, this
nevertheless seems forbidden as the energy density of the tachyonic field /
anti-Chaplygin gas would become ill-defined. This paradox is relieved in the
case of the anti-Chaplygin gas by redefining its energy density and pressure in
terms of distributions peaked on the singularity. The regular cosmological
quantities, continuous across the SFS are the energy density and the square of
the Hubble parameter; those allowing for a jump at the SFS are the Hubble
parameter and expansion rate (both being mirror-symmetric). The pressure and
the decelaration parameter will contain Dirac delta-function contributions
peaked on the SFS, however they anyhow would diverge at the singularity.


title:
Another look at the Landau-gauge gluon and ghost propagators at low
  momentum

abstract:
  We study the gluon and ghost propagators of SU(2) lattice Landau gauge theory
and find their low-momentum behavior being sensitive to the lowest non-trivial
eigenvalue (\lambda_1) of the Faddeev-Popov operator. If the gauge-fixing
favors Gribov copies with small (large) values for \lambda_1 both the ghost
dressing function and the gluon propagator get enhanced (suppressed) at low
momentum. For larger momenta no dependence on Gribov copies is seen. We compare
our lattice data to the corresponding (decoupling) solutions from the DSE/FRGE
study of Fischer, Maas and Pawlowski [Annals Phys. 324 (2009) 2408] and find
qualitatively good agreement.


title: Hyperbolic Alexandrov-Fenchel quermassintegral inequalities II

abstract:
  In this paper we first establish an optimal Sobolev type inequality for
hypersurfaces in $\H^n$(see Theorem \ref{mainthm1}). As an application we
obtain hyperbolic Alexandrov-Fenchel inequalities for curvature integrals and
quermassintegrals. Precisely, we prove a following geometric inequality in the
hyperbolic space $\H^n$, which is a hyperbolic Alexandrov-Fenchel inequality,
\begin{equation*} \begin{array}{rcl} \ds \int_\Sigma \s_{2k}\ge \ds\vs
C_{n-1}^{2k}\omega_{n-1}\left\{\left(\frac{|\Sigma|}{\omega_{n-1}}
\right)^\frac 1k + \left(\frac{|\Sigma|}{\omega_{n-1}} \right)^{\frac 1k\frac
{n-1-2k}{n-1}} \right\}^k, \end{array} \end{equation*} provided that $\Sigma$
is a horospherical convex, where $2k\leq n-1$. Equality holds if and only if
$\Sigma$ is a geodesic sphere in $\H^n$. Here $\sigma_{j}=\s_{j}(\kappa)$ is
the $j$-th mean curvature and $\kappa=(\kappa_1,\kappa_2,\cdots, \kappa_{n-1})$
is the set of the principal curvatures of $\Sigma$. Also, an optimal inequality
for quermassintegrals in $\H^n$ is as following: $$ W_{2k+1}(\Omega)\geq\frac
{\omega_{n-1}}{n}\sum_{i=0}^k\frac{n-1-2k}{n-1-2k+2i}\,C_k^i\bigg(\frac{nW_1(\Omega)}{\omega_{n-1}}\bigg)^{\frac{n-1-2k+2i}{n-1}},
$$ provided that $\Omega\subset\H^n$ is a domain with $\Sigma=\partial\Omega$
horospherical convex, where $2k\leq n-1$. Equality holds if and only if
$\Sigma$ is a geodesic sphere in $\H^n$. Here $W_r(\Omega)$ is
quermassintegrals in integral geometry.


title:
Study of the itinerant electron magnetism of Fe-based superconductors by
  the proximity effect

abstract:
  We used the proximity effect as a tool to achieve an ideal (barrier - free)
NS boundary for quantitative evaluation of transport phenomena that accompany
converting dissipative current into supercurrent in NS systems with
unconventional superconductors, single - crystal chalcogenide FeSe and
granulated pnictide LaO(F)FeAs. Using features (limitations) of Andreev
reflection in the NS systems with dispersion of the electron spin subbands, we
revealed direct evidence for spin - polarized nature of transport and the
absence of residual magnetization in iron - based superconductors in the normal
state: In heterocontacts with single - crystal FeSe and granular LaO(F)FeAs, we
detected a spin-dependent contribution to the efficiency of the Andreev
reflection associated with the spin accumulation at the NS boundary, and a
hysteresis of conductivity of FeSe in the ground state in low external magnetic
fields. Based on our findings, we conclude that in iron-based superconductors,
the itinerant electron magnetism is predominant, magnetism of iron atoms being
localized.


title:
Integration of spatio-temporal contrast sensitivity with a multi-slice
  channelized Hotelling observer

abstract:
  Barten's model of spatio-temporal contrast sensitivity function of human
visual system is embedded in a multi-slice channelized Hotelling observer. This
is done by 3D filtering of the stack of images with the spatio-temporal
contrast sensitivity function and feeding the result (i.e., the perceived image
stack) to the multi-slice channelized Hotelling observer. The proposed
procedure of considering spatio-temporal contrast sensitivity function is
generic in the sense that it can be used with observers other than multi-slice
channelized Hotelling observer. Detection performance of the new observer in
digital breast tomosynthesis is measured in a variety of browsing speeds, at
two spatial sampling rates, using computer simulations. Our results show a peak
in detection performance in mid browsing speeds. We compare our results to
those of a human observer study reported earlier (I. Diaz et al. SPIE MI 2011).
The effects of display luminance, contrast and spatial sampling rate, with and
without considering foveal vision, are also studied. Reported simulations are
conducted with real digital breast tomosynthesis image stacks, as well as
stacks from an anthropomorphic software breast phantom (P. Bakic et al. Med
Phys. 2011). Lesion cases are simulated by inserting single
micro-calcifications or masses. Limitations of our methods and ways to improve
them are discussed.


title: Fluctuation Analysis for the Loss From Default

abstract:
  We analyze the fluctuation of the loss from default around its large
portfolio limit in a class of reduced-form models of correlated firm-by-firm
default timing. We prove a weak convergence result for the fluctuation process
and use it for developing a conditionally Gaussian approximation to the loss
distribution. Numerical results illustrate the accuracy and computational
efficiency of the approximation.


title: Electron-pair densities with time-dependent quantum Monte-Carlo

abstract:
  In this paper we use sets of de Broglie-Bohm trajectories to describe the
quantum correlation effects which take place between the electrons in helium
atom due to exchange and Coulomb interactions. A short-range screening of the
Coulomb potential is used to modify the repulsion between the same spin
electrons in physical space in order to comply with the Pauli's exclusion
principle. By calculating the electron-pair density for ortho-helium we found
that the shape of the exchange hole can be controlled uniquely by a simple
screening parameter. For para-helium the inter-electronic distance, and hence
the Coulomb hole, results from the combined action of the Coulomb repulsion and
the non-local quantum correlations. In this way a robust and
self-interaction-free approach is presented to find both the ground state and
the time evolution of non-relativistic quantum systems.


title: Period Error Estimation for the Kepler Eclipsing Binary Catalog

abstract:
  The Kepler Eclipsing Binary Catalog (KEBC)describes 2165 eclipsing binaries
identified in the 115 deg^2 Kepler Field based on observations from Kepler
quarters Q0, Q1, and Q2. The periods in the KEBC are given in units of days out
to six decimal places but no period errors are provided. We present the PEC
(Period Error Calculator) algorithm which can be used to estimate the period
errors of strictly periodic variables observed by the Kepler Mission. The PEC
algorithm is based on propagation of error theory and assumes that observation
of every light curve peak/minimum in a long time-series observation can be
unambiguously identified. The PEC algorithm can be efficiently programmed using
just a few lines of C computer language code. The PEC algorithm was used to
develop a simple model which provides period error estimates for eclipsing
binaries in the KEBC with periods less than 62.5 days. KEBC systems with
periods >=62.5 days have KEBC period errors of about 0.0144 days. Periods and
period errors of 7 eclipsing binary systems in the KEBC were measured using the
NASA Exoplanet Archive Periodogram Service and compared to period errors
estimated using the PEC algorithm.


title: Balancing parallel assembly lines with disabled workers

abstract:
  We study an assembly line balancing problem that occurs in sheltered worker
centers for the disabled, where workers with very different characteristics are
present. We are interested in the situation in which parallel assembly lines
are allowed and name the resulting problem as parallel assembly line worker
assignment and balancing problem. We present a linear mixed-integer formulation
and a four-stage heuristic algorithm. Computational results with a large set of
instances recently proposed in the literature show the advantages of allowing
alternative line layouts.


title:
Improved approximation for 3-dimensional matching via bounded pathwidth
  local search

abstract:
  One of the most natural optimization problems is the k-Set Packing problem,
where given a family of sets of size at most k one should select a maximum size
subfamily of pairwise disjoint sets. A special case of 3-Set Packing is the
well known 3-Dimensional Matching problem. Both problems belong to the Karp`s
list of 21 NP-complete problems. The best known polynomial time approximation
ratio for k-Set Packing is (k + eps)/2 and goes back to the work of Hurkens and
Schrijver [SIDMA`89], which gives (1.5 + eps)-approximation for 3-Dimensional
Matching. Those results are obtained by a simple local search algorithm, that
uses constant size swaps.
  The main result of the paper is a new approach to local search for k-Set
Packing where only a special type of swaps is considered, which we call swaps
of bounded pathwidth. We show that for a fixed value of k one can search the
space of r-size swaps of constant pathwidth in c^r poly(|F|) time. Moreover we
present an analysis proving that a local search maximum with respect to O(log
|F|)-size swaps of constant pathwidth yields a polynomial time (k + 1 +
eps)/3-approximation algorithm, improving the best known approximation ratio
for k-Set Packing. In particular we improve the approximation ratio for
3-Dimensional Matching from 3/2 + eps to 4/3 + eps.


title: On the equilibrium figure of close-in planets and satellites

abstract:
  Many exoplanets have been observed close to their parent stars with orbital
periods of a few days. As for the major satellites of the Jovian planets, the
figure of these planets is expected to be strongly shaped by tidal forces.
However, contrarily to Solar System satellites, exoplanets may present high
values for the obliquity and eccentricity due to planetary perturbations, and
may also be captured in spin-orbit resonances different from the synchronous
one. Here we give a general formulation of the equilibrium figure of those
bodies, that makes no particular assumption on the spin and/or orbital
configurations. The gravity field coefficients computed here are well suited
for describing the figure evolution of a body whose spin and orbit undergo
substantial variations in time.


title: Loose Hamilton Cycles in Regular Hypergraphs

abstract:
  We establish a relation between two uniform models of random $k$-graphs (for
constant $k \ge 3$) on $n$ labeled vertices: $H(n,m)$, the random $k$-graph
with exactly $m$ edges, and $H(n,d)$, the random $d$-regular $k$-graph. By
extending to $k$-graphs the switching technique of McKay and Wormald, we show
that, for some range of $d = d(n)$ and a constant $c > 0$, if $m \sim cnd$,
then one can couple $H(n,m)$ and $H(n,d)$ so that the latter contains the
former with probability tending to one as $n \to \infty$. In view of known
results on the existence of a loose Hamilton cycle in $H(n,m)$, we conclude
that $H(n,d)$ contains a loose Hamilton cycle when $\log n = o(d)$ (or just $d
\ge C log n$, if $k = 3$) and $d = o(n^{1/2})$.


title: Response of the XENON100 Dark Matter Detector to Nuclear Recoils

abstract:
  Results from the nuclear recoil calibration of the XENON100 dark matter
detector installed underground at the Laboratori Nazionali del Gran Sasso
(LNGS), Italy are presented. Data from measurements with an external 241AmBe
neutron source are compared with a detailed Monte Carlo simulation which is
used to extract the energy dependent charge-yield Qy and relative scintillation
efficiency Leff. A very good level of absolute spectral matching is achieved in
both observable signal channels - scintillation S1 and ionization S2 - along
with agreement in the 2-dimensional particle discrimination space. The results
confirm the validity of the derived signal acceptance in earlier reported dark
matter searches of the XENON100 experiment.


title: Information and Computation

abstract:
  In this chapter, concepts related to information and computation are reviewed
in the context of human computation. A brief introduction to information theory
and different types of computation is given. Two examples of human computation
systems, online social networks and Wikipedia, are used to illustrate how these
can be described and compared in terms of information and computation.


title: Polyadic-like algebras without the amalgamation property

abstract:
  Usually when we have polyadic-like algebras, meaning that we have infinitary
substitutions (that is substitutions moving infinitely many points) in the
similarity type, then we get the superamalgamation property especially if this
class of algebras happen to be a variety. This for example happens for (full)
polyadic algebras, full Heyting algebras and reducts of those using only
finitely many infinitary substitutions, like Sains Boolean and Heyting
algebras. (The last is studied by Sayed Ahmed) . In cylindric-like algebras
(like quasi-polyadic algebras) when we do not have infinitary substitutions, we
do not get even the amalgamation property . In this paper, we give an example
of a polyadic like variety (we have infinitary substitutions, in fact
infinitely many of them) for which the amalgamation property fails.


title: Recurrent Perihelion Activity in (3200) Phaethon

abstract:
  We present a study of planet-crossing asteroid (3200) Phaethon at three
successive perihelia in 2009, 2010 and 2012, using the NASA STEREO spacecraft.
Phaethon is clearly detected in 2009 and 2012, but not in 2010. In both former
years, Phaethon brightened unexpectedly by ~1 magnitude at large phase angles,
inconsistent with the ~1 magnitude of steady fading expected from a discrete,
macroscopic body over the same phase angle range. With a perihelion distance of
0.14 AU and surface temperatures up to ~1000 K, a thermal origin of this
anomalous brightening is strongly suspected. However, simple thermal emission
from Phaethon is too weak, by a factor >1000, to explain the brightening.
Neither can ice survive on this body, ruling out comet-like sublimation. Our
preferred explanation is that brightening occurs as a result of dust produced
and ejected from Phaethon, perhaps by thermal fracture and/or thermal
decomposition of surface minerals when near perihelion. A contribution from
prompt emission by oxygen released by desiccation of surface minerals cannot be
excluded. We infer an ejected mass of order 4x10^8 a_mm kg per outburst, where
a_mm is the mean dust radius in millimeters. For plausible dust radii, this
mass is small compared to the estimated mass of Phaethon (~2x10^14 kg) and to
the mass of the Geminid stream (10^12 kg to 10^13 kg) with which Phaethon is
dynamically associated. Perihelion mass-loss events like those observed in 2009
and 2012 contribute to, but do not necessarily account for the Geminids stream
mass.


title:
Similarity Renormalization Group Evolution of Three-Nucleon Forces in a
  Hyperspherical Momentum Representation

abstract:
  A new framework for computing the Similarity Renormalization Group (SRG)
evolution of three-nucleon forces (3NF) in momentum representation is
presented. The use of antisymmetric three-particle hyperspherical momentum
states ensures unitary evolutions within certain basis truncations, much like
antisymmetric harmonic oscillator SRG evolutions. Additionally, in each partial
wave the $T_{\mbox{rel}}$-SRG regulator is exactly represented, similar to
recent 3NF momentum representation evolutions. Unitary equivalence is
demonstrated for the triton using several chiral two- plus three-nucleon
interactions. This method allows for a clean visualization of the evolution of
the three-nucleon forces, which manifests the SRG decoupling pattern and
low-momentum universality.


title:
Interference Alignment with Diversity for the $2 \times 2$ $X$ Network
  with four antennas

abstract:
  A transmission scheme based on the Alamouti code, which we call the
Li-Jafarkhani-Jafar (LJJ) scheme, was recently proposed for the $2 \times 2$
$X$ Network (i.e., two-transmitter (Tx) two-receiver (Rx) $X$ Network) with two
antennas at each node. This scheme was claimed to achieve a sum degrees of
freedom (DoF) of $\frac{8}{3}$ and also a diversity gain of two when fixed
finite constellations are employed at each Tx. Furthermore, each Tx required
the knowledge of only its own channel unlike the Jafar-Shamai scheme which
required global CSIT to achieve the maximum possible sum DoF of $\frac{8}{3}$.
In this paper, we extend the LJJ scheme to the $2 \times 2$ $X$ Network with
four antennas at each node. The proposed scheme also assumes only local channel
knowledge at each Tx. We prove that the proposed scheme achieves the maximum
possible sum DoF of $\frac{16}{3}$. In addition, we also prove that, using any
fixed finite constellation with appropriate rotation at each Tx, the proposed
scheme achieves a diversity gain of at least four.


title:
Brownian Motion in a Speckle Light Field: Tunable Anomalous Diffusion
  and Deterministic Optical Manipulation

abstract:
  The motion of particles in random potentials occurs in several natural
phenomena ranging from the mobility of organelles within a biological cell to
the diffusion of stars within a galaxy. A Brownian particle moving in the
random optical potential associated to a speckle, i.e., a complex interference
pattern generated by the scattering of coherent light by a random medium,
provides an ideal mesoscopic model system to study such phenomena. Here, we
derive a theory for the motion of a Brownian particle in a speckle and, in
particular, we identify its universal characteristic timescale levering on the
universal properties of speckles. This theoretical insight permits us to
identify several interesting unexplored phenomena and applications. As an
example of the former, we show the possibility of tuning anomalous diffusion
continuously from subdiffusion to superdiffusion. As an example of the latter,
we show the possibility of harnessing the speckle memory effect to perform some
basic deterministic optical manipulation tasks such as guiding and sorting by
employing random speckles, which might broaden the perspectives of optical
manipulation for real-life applications by providing a simple and
cost-effective technique.


title: Domain Wall Model in the Galactic Bose-Einstein Condensate Halo

abstract:
  We assume that the galactical dark matter halo, considered composed of an
axionlike particles Bose-Einstein condensate \cite{pir12}, can present
topological defects, namely domain walls, arising as the dark soliton solution
for the Gross-Pitaevskii equation in a self-graviting potential. We investigate
the influence that such substructures would have in the gravitational
interactions within a galaxy. We find that, for the simple domain wall model
proposed, the effects are too small to be identified, either by means of a
local measurement of the gradient of the gravitational field or by analysing
galaxy rotation curves. In the first case, the gradient of the gravitational
field in the vicinity of the domain wall would be $10^{-31}\; (m/s^2)/m$. In
the second case, the ratio of the tangential velocity correction of a star due
to the presence of the domain wall to the velocity in the spherical symmetric
case would be $10^{-8}$.


title:
A Duality in Entanglement Enabling a Test of Quantum
  Indistinguishability Unaffected by Interactions

abstract:
  We point out an earlier unnoticed implication of quantum
indistinguishability, namely, a property which we call `dualism' that
characterizes the entanglement of two identical particles (say, two ions of the
same species) -- a feature which is absent in the entanglement of two
non-identical particles (say, two ions of different species). A crucial
application of this property is that it can be used to test quantum
indistinguishability without bringing the relevant particles together, thereby
avoiding the effects of mutual interaction. This is in contrast to the existing
tests of quantum indistinguishability. Such a scheme, being independent of the
nature and strength of mutual interactions of the identical particles involved,
has potential applications, including the probing of the transition from
quantum indistinguishability to classical distinguishability.


title: Fluctuational internal Josephson effect in topological insulator film

abstract:
  Tunneling between opposite surfaces of topological insulator thin film
populated by electrons and holes is considered. We predict considerable
enhancement of tunneling conductivity by Cooper electron-hole pair fluctuations
that are precursor of their Cooper pairing. Cooper pair fluctuations lead to
the critical behavior of tunneling conductivity in vicinity of critical
temperature with critical index \nu=2. If the pairing is suppressed by disorder
the behavior of tunneling conductivity in vicinity of quantum phase transition
is also critical with the index \mu=2. The effect can be interpreted as
fluctuational internal Josephson effect and it is general phenomenon for
electron-hole bilayers. The peculiarities of the effect in other realizations
of electron-hole bilayer are discussed.


title: Tenement house model

abstract:
  Most of the common used models of epidemic spreading allow contaminating many
neighbors of a particular node in the network. They are usually analyzed by
differential equations on probability vectors. We propose a model of epidemic
spreading, which restricts to at most one contamination per time step and
analyze it by discrete approach, working on vectors of possible states of the
system. Theoretical predictions of epidemic treshold, stationary state and time
needed to reach it are given and appear to be perfectly consistent with
computer simulations. We also point ou that the model appears to be well suited
to mimic epidemic spreading within student communes.


title:
Compact stable hypersurfaces with free boundary in convex solid cones
  with homogeneous densities

abstract:
  We consider a smooth Euclidean solid cone endowed with a smooth homogeneous
density function used to weight Euclidean volume and hypersurface area. By
assuming convexity of the cone and a curvature-dimension condition we prove
that the unique compact, orientable, second order minima of the weighted area
under variations preserving the weighted volume and with free boundary in the
boundary of the cone are intersections with the cone of round spheres centered
at the vertex.


title: Hidden charm molecules in finite volume

abstract:
  In the present paper we address the interaction of pairs of charmed mesons
with hidden charm in a finite box. We use the interaction from a recent model
based on heavy quark spin symmetry that predicts molecules of hidden charm in
the infinite volume. The energy levels in the box are generated within this
model, and from them some synthetic data are generated. These data are then
employed to study the inverse problem of getting the energies of the bound
states and phase shifts for $D \bar D$ or $D^* {\bar D}^*$. Different
strategies are investigated using the lowest two levels for different values of
the box size, carrying a study of the errors produced. Starting from the upper
level, fits to the synthetic data are carried out to determine the scattering
length and effective range plus the binding energy of the ground state. A
similar strategy using the effective range formula is considered with a
simultaneous fit to the two levels, one above and the other one below
threshold. This method turns out to be more efficient than the other one.
Finally, a method based on the fit to the data by means of a potential and a
loop function conveniently regularized, turns out to be very efficient and
allows to produce accurate results in the infinite volume starting from levels
of the box with errors far larger than the uncertainties obtained in the final
results. A regularization method based on Gaussian wave functions turns out to
be rather efficient in the analysis and as a byproduct a practical and fast
method to calculate the L\"uscher function with high precision is presented.


title:
Semiclassical trace formula for the two-dimensional radial power-law
  potentials

abstract:
  The trace formula for the density of single-particle levels in the
two-dimensional radial power-law potentials, which nicely approximate the
radial dependence of the Woods-Saxon potential and quantum spectra in a bound
region, was derived by the improved stationary phase method. The specific
analytical results are obtained for the powers 4 and 6. The enhancement
phenomena near the bifurcations of periodic orbits are found to be significant
for the description of the fine shell structure. It is shown that the
semiclassical trace formulas for the shell corrections to the level density and
energy reproduce the quantum results with good accuracy through all the
bifurcation (symmetry breaking) catastrophe points, where the standard
stationary-phase method breaks down. Various limits (including the harmonic
oscillator and the spherical billiard) are obtained from the same analytical
trace formula.


title: On finitely generated reducts of polyadic equality algebras

abstract:
  Extending a deep result of Andreka and Nemeti, we show that unlike the
dimension complemented case, there are weak set quasi-polyadic simple algebras
of dimension >1, that are finitely genertaed with more than one element, but
cannot be generated with a single element. We give a contrasting result for
polyadic agebras of infinite dimension.


title: Some Diophantine equations related to positive-rank elliptic curves

abstract:
  We give conditions on the rational numbers a,b,c which imply that there are
infinitely many triples (x,y,z) of rational numbers such that x+y+z=a+b+c and
xyz=abc. We do the same for the equations x+y+z=a+b+c and
x^3+y^3+z^3=a^3+b^3+c^3. These results rely on exhibiting families of
positive-rank elliptic curves.


title:
Proper orthogonal decomposition of eigen modes in a gas affected by a
  mass force

abstract:
  The relations connecting perturbations in acoustic and entropy modes in a gas
affected by a constant mass force, are derived. The background temperature of a
gas may vary in the direction of an external mass force. The relations are
independent on time. They make possible to decompose the total vector of
perturbations into acoustic and non-acoustic parts uniquely at any instant.
%The conclusions of distribution of the energy between sound and entropy modes
may be also made at any instant. In order to do this, three quantities are
required, according to the number of modes. In one dimension, the reference
quantities may be total perturbations in entropy, pressure and velocity. The
total energy of flow is determined. The examples of dismemberment of the total
field into acoustic and entropy parts relate to the unperturbed temperature of
a gas which linearly depends on the spacial co-ordinate.


title:
Reconnection and electron temperature anisotropy in sub-proton scale
  plasma turbulence

abstract:
  Turbulent behavior at sub-proton scales in magnetized plasmas is important
for a full understanding of the energetics of astrophysical flows such as the
solar wind. We study the formation of electron temperature anisotropy due to
reconnection in the turbulent decay of sub-proton scale fluctuations using two
dimensional, particle-in-cell (PIC) plasma simulations with realistic
electron-proton mass ratio and a guide field out of the simulation plane. A
fluctuation power spectrum with approximately power law form is created down to
scales of order the electron gyroradius. In the dynamic magnetic field
topology, which gradually relaxes in complexity, we identify the signatures of
collisionless reconnection at sites of X-point field geometry. The reconnection
sites are generally associated with regions of strong parallel electron
temperature anisotropy. The evolving topology of magnetic field lines connected
to a reconnection site allows spatial mixing of electrons accelerated at
multiple, spatially separated reconnection regions. This leads to the formation
of multi-peaked velocity distribution functions with a strong parallel
temperature anisotropy. In a three-dimensional system, supporting the
appropriate wave vectors, the multi-peaked distribution functions would be
expected to be unstable to kinetic instabilities, contributing to dissipation.
The proposed mechanism of anisotropy formation is also relevant to space and
astrophysical systems where the evolution of the plasma is constrained by
linear temperature anisotropy instability thresholds. The presence of
reconnection sites leads to electron energy gain, nonlocal velocity space
mixing and the formation of strong temperature anisotropy; this is evidence of
an important role for reconnection in the dissipation of turbulent
fluctuations.


title:
Density of fiberwise orbits in minimal iterated function systems on the
  circle

abstract:
  We study the minimality of almost every orbital branch of minimal iterated
function systems (IFSs). We prove that this kind of minimality holds for
forward and backward minimal IFSs generated by orientation-preserving
homeomorphisms of the circle. We provide new examples of iterated functions
systems where this behavior persists under perturbation of the generators.


title: Large Deviation For Outlying Coordinates in Beta Ensembles

abstract:
  For Y a subset of the complex plane,a beta ensemble is a sequence of
probability measures on Y^n for n=1,2,3...depending on a real-valued continuous
function Q and a real positive parameter beta.We consider the associated
sequence of probability measures on Y where the probability of a subset W is
given by the probability that at least one coordinate of Y^n belongs to W. With
appropriate restrictions on Y,Q we prove a large deviation principle for this
sequence of measures. This extends a result of Borot-Guionnet to subsets of the
complex plane and to beta ensembles defined with measures using a
Bernstein-Markov condition.


title: RKKY Interaction and Intrinsic Frustration in Non-Fermi Liquid Metals

abstract:
  We study RKKY interaction in non-Fermi liquid metals. We find that the RKKY
interaction mediated by non-Fermi liquid metals can be of much longer range
than for a Fermi liquid. The oscillatory nature of RKKY interaction thus
becomes more important in non-Fermi liquids, and gives rise to enhanced
frustration when the spins form a lattice. Frustration suppresses the magnetic
ordering temperature of the lattice spin system. Furthermore, we find that the
spin system with longer range RKKY interaction can be described by the
Brazovskii model, where the ordering wavevector lies on a shell with constant
radius. Strong fluctuations in such model lead to a first-order phase
transition and/or glassy phase. This may explain some recent experiments where
glassy behavior was observed in stoichiometric heavy fermion material close to
a ferromagnetic quantum critical point.


title: Light leaves and Lusztig's conjecture

abstract:
  We introduce the Double leaves basis, a combinatorial basis for the Hom
spaces between two Bott-Samelson-Soergel bimodules. As an application we give a
combinatorial algorithm to find, for any given Weyl or affine Weyl group, the
set of primes for which Soergel's conjecture hold. This conjecture for Weyl
groups is equivalent to a part of Lusztig's conjecture and for affine Weyl
groups implies (and is probably equivalent to) the full Lusztig conjecture.
Following this double leaves approach G. Williamson found counterexamples to
Lusztig's conjecture. The double leaves basis has found other spectacular
applications in the recent proof by B. Elias and G. Williamson of the
positivity of the coefficients of Kazhdan-Lusztig polynomials for any Coxeter
system and in their algebraic proof of Kazhdan-Lusztig conjecture.


title: Cutting corners cheaply, or how to remove Steiner points

abstract:
  Our main result is that the Steiner Point Removal (SPR) problem can always be
solved with polylogarithmic distortion, which answers in the affirmative a
question posed by Chan, Xia, Konjevod, and Richa (2006). Specifically, we prove
that for every edge-weighted graph $G = (V,E,w)$ and a subset of terminals $T
\subseteq V$, there is a graph $G'=(T,E',w')$ that is isomorphic to a minor of
$G$, such that for every two terminals $u,v\in T$, the shortest-path distances
between them in $G$ and in $G'$ satisfy $d_{G,w}(u,v) \le d_{G',w'}(u,v) \le
O(\log^5|T|) \cdot d_{G,w}(u,v)$. Our existence proof actually gives a
randomized polynomial-time algorithm. Our proof features a new variant of
metric decomposition. It is well-known that every $n$-point metric space
$(X,d)$ admits a $\beta$-separating decomposition for $\beta=O(\log n)$, which
roughly means for every desired diameter bound $\Delta>0$ there is a randomized
partitioning of $X$, which satisfies the following separation requirement: for
every $x,y \in X$, the probability they lie in different clusters of the
partition is at most $\beta\,d(x,y)/\Delta$. We introduce an additional
requirement, which is the following tail bound: for every shortest-path $P$ of
length $d(P) \leq \Delta/\beta$, the number of clusters of the partition that
meet the path $P$, denoted $Z_P$, satisfies $\Pr[Z_P > t] \le 2e^{-\Omega(t)}$
for all $t>0$.


title: Coulomb Drag Mechanisms in Graphene

abstract:
  Recent measurements revealed an anomalous Coulomb drag in graphene, hinting
at new physics at charge neutrality. The anomalous drag is explained by a new
mechanism based on energy transport, which involves interlayer energy transfer,
coupled to charge flow via lateral heat currents and thermopower. The old and
new drag mechanisms are governed by distinct physical effects, resulting in
starkly different behavior, in particular for drag magnitude and sign near
charge neutrality. The new mechanism explains the giant enhancement of drag
near charge neutrality, as well as its sign and anomalous sensitivity to
magnetic field. Under realistic conditions, energy transport dominates in a
wide temperature range, giving rise to a universal value of drag which is
essentially independent of the electron-electron interaction strength.


title: Reverse Carleson measures in Hardy spaces

abstract:
  We give a necessary and sufficient condition for a measure $\mu$ in the
closed unit disk to be a reverse Carleson measure for Hardy spaces. This
extends a previous result of Lef\'evre, Li, Queff\'elec and
Rodr\'{\i}guez-Piazza \cite{LLQR}. We also provide a simple example showing
that the analogue for the Paley-Wiener space does not hold. This example can be
generalised to model spaces associated to one-component inner functions.


title: Advances in Quark Gluon Plasma

abstract:
  In the last 20 years, heavy-ion collisions have been a unique way to study
the hadronic matter in the laboratory. Its phase diagram remains unknown,
although many experimental and theoretical studies have been undertaken in the
last decades. The Relativistic Heavy Ion Collider (RHIC) at BNL was the first
ever built heavy-ion collider. RHIC delivered its first collisions in June 2000
boosting the heavy-ion community. Impressive amount of experimental results has
been obtained. In November 2010, the Large Hadron Collider (LHC) at CERN
delivered lead-lead collisions at unprecedented center-of-mass energies, 14
times larger than that at RHIC. Needless to say that the heavy-ion programs at
RHIC and LHC promise fascinating and exciting results in the next decade. In
the second part, a historical approach will be adopted, starting with the
notion of limiting temperature of matter introduced by Hagedorn in the 60's and
the discovery of the QCD asymptotic freedom in the 70's. The phase diagram of
hadronic matter, conceived as nowadays, will be shown together with the most
important predictions of lattice QCD calculations at finite temperature. In the
third part, the heavy-ion collisions at ultra-relativistic energies will be
proposed as a unique experimental method to study QGP in the laboratory, as
suggested by the Bjorken model. In the last part of these lectures, I will
present my biased review of the numerous experimental results obtained in the
last decade at RHIC which lead to the concept of strong interacting QGP, and
the first results obtained at LHC with the 2010 and 2011 PbPb runs. Finally,
the last section is devoted to refer to other lectures about quark gluon plasma
and heavy ion physics.


title: Gauge Mediation beyond Minimal Flavor Violation

abstract:
  We study a minimal modification of Gauge Mediation in which the messenger
sector couples directly to the MSSM matter fields. These couplings are
controlled by the same dynamics that explain the flavor hierarchies, and
therefore are parametrically as small as the Yukawas. This setup gives rise to
an interesting SUSY spectrum that is calculable in terms of a single new
parameter. Due to large A-terms, the model can easily accommodate a 126 GeV
Higgs with a relatively light SUSY spectrum. The flavor structure depends on
the particular underlying flavor model, but flavor-violating effects arise
dominantly in the up-sector and are strongly suppressed in Delta F =2
observables. This strong suppression is reminiscent of what happens in the case
of wave function renormalization or Partial Compositeness, despite the
underlying flavor model can be a simple U(1) flavor model (which in the context
of Gravity Mediation suffers from strong Delta F =2 constraints). This
structure allows to account for the recent observation of direct CP violation
in D-meson decays.


title:
Cross Sections and Transverse Single-Spin Asymmetries in Forward Jet
  Production from Proton Collisions at $\sqrt{s}=500$ GeV

abstract:
  Measurements of the production of forward jets from transversely polarized
proton collisions at $\sqrt{s}=500$ GeV conducted at the Relativistic Heavy Ion
Collider (RHIC) are reported. Our measured jet cross section is consistent with
hard scattering expectations. Our measured analyzing power for forward jet
production is small and positive, and provides constraints on the Sivers
functions that are related to partonic orbital angular momentum through
theoretical models.


title:
Designing Experiments to Understand the Variability in Biochemical
  Reaction Networks

abstract:
  Exploiting the information provided by the molecular noise of a biological
process has proven to be valuable in extracting knowledge about the underlying
kinetic parameters and sources of variability from single cell measurements.
However, quantifying this additional information a priori, to decide whether a
single cell experiment might be beneficial, is currently only possibly in very
simple systems where either the chemical master equation is computationally
tractable or a Gaussian approximation is appropriate. Here we show how the
information provided by distribution measurements can be approximated from the
first four moments of the underlying process. The derived formulas are
generally valid for any stochastic kinetic model including models that comprise
both intrinsic and extrinsic noise. This allows us to propose an optimal
experimental design framework for heterogeneous cell populations which we
employ to compare the utility of dual reporter and perturbation experiments for
separating extrinsic and intrinsic noise in a simple model of gene expression.
Subsequently, we compare the information content of different experiments which
have been performed in an engineered light-switch gene expression system in
yeast and show that well chosen gene induction patterns may allow one to
identify features of the system which remain hidden in unplanned experiments.


title: Efficient evolutionary dynamics with extensive-form games

abstract:
  Evolutionary game theory combines game theory and dynamical systems and is
customarily adopted to describe evolutionary dynamics in multi-agent systems.
In particular, it has been proven to be a successful tool to describe
multi-agent learning dynamics. To the best of our knowledge, we provide in this
paper the first replicator dynamics applicable to the sequence form of an
extensive-form game, allowing an exponential reduction of time and space w.r.t.
the currently adopted replicator dynamics for normal form. Furthermore, our
replicator dynamics is realization equivalent to the standard replicator
dynamics for normal form. We prove our results for both discrete-time and
continuous-time cases. Finally, we extend standard tools to study the stability
of a strategy profile to our replicator dynamics.


title:
Cross-talk and transitions between multiple spatial maps in an attractor
  neural network model of the hippocampus: phase diagram (I)

abstract:
  We study the stable phases of an attractor neural network model, with binary
units, for hippocampal place cells encoding 1D or 2D spatial maps or
environments. Using statistical mechanics tools we show that, below critical
values for the noise in the neural response and for the number of environments,
the network activity is spatially localized in one environment. We calculate
the number of stored environments. For high noise and loads the network
activity extends over space, either uniformly or with spatial heterogeneities
due to the cross-talk between the maps, and memory of environments is lost.
Analytical predictions are corroborated by numerical simulations.


title: How Hard is Counting Triangles in the Streaming Model

abstract:
  The problem of (approximately) counting the number of triangles in a graph is
one of the basic problems in graph theory. In this paper we study the problem
in the streaming model. We study the amount of memory required by a randomized
algorithm to solve this problem. In case the algorithm is allowed one pass over
the stream, we present a best possible lower bound of $\Omega(m)$ for graphs
$G$ with $m$ edges on $n$ vertices. If a constant number of passes is allowed,
we show a lower bound of $\Omega(m/T)$, $T$ the number of triangles. We match,
in some sense, this lower bound with a 2-pass $O(m/T^{1/3})$-memory algorithm
that solves the problem of distinguishing graphs with no triangles from graphs
with at least $T$ triangles. We present a new graph parameter $\rho(G)$ -- the
triangle density, and conjecture that the space complexity of the triangles
problem is $\Omega(m/\rho(G))$. We match this by a second algorithm that solves
the distinguishing problem using $O(m/\rho(G))$-memory.


title: Bandwidth reduction in cognitive radio

abstract:
  Due to mushroom development of wireless devices cognitive radio is used to
resolve the bandwidth utilization and sacristy problem. The crafty usage of
bandwidth in cognitive radio based on error correcting codes is ensured to
accomodate un authorized user. This study proposes a transmission model by
which a finite sequence of binary cyclic codes constructed by a binary BCH code
of length $n=2^{s}-1$, in which all codes have same error correction capability
and code rate but sequentially increasing code lengths greater than $n$.
Initially all these codes are carrying data of their corresponding primary
users. A transmission pattern is planned in the sprit of interweave model deals
the transmission parameters; modulation scheme, bandwidth and code rate.
Whenever, any of the primary users having mod of transmission, the binary
cyclic code, is not using its allocated bandwidth, the user having its data
built by binary BCH code enter and exploit the free path as a secondary user.
Eventually whenever the primary user with $W$ bandwidth having binary BCH code
for its data transmission, change its status as a secondary user, it just
requires the bandwidth less than $W$.


title: Coupled cell networks and their hidden symmetries

abstract:
  Dynamical systems with a coupled cell network structure can display
synchronous solutions, spectral degeneracies and anomalous bifurcation
behavior. We explain these phenomena here for homogeneous networks, by showing
that every homogeneous network dynamical system admits a semigroup of hidden
symmetries. The synchronous solutions lie in the symmetry spaces of this
semigroup and the spectral degeneracies of the network are determined by its
indecomposable representations. Under a condition on the semigroup
representation, we prove that a one-parameter synchrony breaking steady state
bifurcation in a coupled cell network must generically occur along an
absolutely indecomposable subrepresentation. We conclude with a classification
of generic one-parameter bifurcations in monoid networks with two or three
cells.


title:
New graded methods in the homological algebra of semisimple algebraic
  groups

abstract:
  Let $G$ be a semisimple algebraic group over an algebraically closed field
$k$ of positive characteristic $p$. Under some restrictions on the size of $p$,
the present paper establishes new results on the $G$-module structure of
$\Ext^\bullet_{G_1}(V,W)$ when $V,W$ belong to several important classes of
rational $G$-modules, and $G_1$ denotes the first Frobenius kernel of $G$. For
example, it is proved that, if $L,L'$ are ($p$-regular) irreducible
$G_1$-modules, then $\Ext^n_{G_1}(L,L')^{[-1]}$ has a good filtration with
computable multiplicities. This and many other results depend on the entirely
new technique of using methods of what we call forced gradings in the
representation theory of $G$, as developed by the authors in recent papers, and
extended here.
  In addition to providing proofs, these methods lead effectively to a new
conceptual framework for the study of rational $G$-modules, and, in this
context, to the introduction of a new class of graded finite dimensional
algebras, which we call Q-Koszul algebras. These algebras are similar to Koszul
algebras, but are quasi-hereditary, rather than semisimple, in grade 0.


title: Existence of $q$-Analogs of Steiner Systems

abstract:
  Let $\F_q^n$ be a vector space of dimension $n$ over the finite field $\F_q$.
A $q$-analog of a Steiner system (briefly, a $q$-Steiner system), denoted
$S_q[t,k,n]$, is a set $S$ of $k$-dimensional subspaces of $\F_q^n$ such that
each $t$-dimensional subspace of $\F_q^n$ is contained in exactly one element
of $S$. Presently, $q$-Steiner systems are known only for $t=1$, and in the
trivial cases $t = k$ and $k = n$. Invthis paper, the first nontrivial
$q$-Steiner systems with $t >= 2$ are constructed. Specifically, several
nonisomorphic $q$-Steiner systems $S_2[2,3,13]$ are found by requiring that
their automorphism groups contain the normalizer of a Singer subgroup of
$\GL(13,2)$. This approach leads to an instance of the exact cover problem,
which turns out to have many solutions.


title: Modeling the Propagation, Breaking and Drift of Ocean Surface Wave

abstract:
  A new model other than the classical ones given by Airy, Stokes and Gerstner
for the ocean surface wave is constructed. It leads to new understandings for
the wave mechanisms: (1) A wave with bigger amplitude or smaller steepness
travels faster; (2) The wave breaks when the front angle is bigger than 46.3
degree; (3) The magnitude of the wave drift should be smaller than that of the
known Stokes drift.


title:
Effect of Metallicity on the Evolution of the Habitable Zone from the
  Pre-Main Sequence to the Asymptotic Giant Branch and the Search for Life

abstract:
  During the course of stellar evolution, the location and width of the
habitable zone changes as the luminosity and radius of the star evolves. The
duration of habitability for a planet located at a given distance from a star
is greatly affected by the characteristics of the host star. A quantification
of these effects can be used observationally in the search for life around
nearby stars. The longer the duration of habitability, the more likely it is
that life has evolved. The preparation of observational techniques aimed at
detecting life would benefit from the scientific requirements deduced from the
evolution of the habitable zone. We present a study of the evolution of the
habitable zone around stars of 1.0, 1.5, and 2.0 M$_{\odot}$ for metallicities
ranging from Z=0.0001 to Z=0.070. We also consider the evolution of the
habitable zone from the pre-main sequence until the asymptotic giant branch is
reached. We find that metallicity strongly affects the duration of the
habitable zone for a planet as well as the distance from the host star where
the duration is maximized. For a 1.0 M$_{\odot}$ star with near Solar
metallicity, Z=0.017, the duration of the habitable zone is $>$10 Gyr at
distances 1.2 to 2.0 AU from the star, whereas the duration is $>$20 Gyr for
high metallicity stars (Z=0.070) at distances of 0.7 to 1.8 AU, and $\sim$4 Gyr
at distances of 1.8 to 3.3 AU for low metallicity stars (Z=0.0001).
Corresponding results have been obtained for stars of 1.5 and 2.0 solar masses.


title:
Higher-Order Compositional Modeling of Three-phase Flow in 3D Fractured
  Porous Media Using Cross-flow Equilibrium Approach

abstract:
  Numerical simulation of multiphase compositional flow in fractured porous
media, when all the species can transfer between the phases, is a real
challenge. Despite the broad applications in hydrocarbon reservoir engineering
and hydrology, a compositional numerical simulator for three-phase flow in
fractured media has not appeared in the literature, to the best of our
knowledge. In this work, we present a three-phase fully compositional simulator
for fractured media, based on higher-order finite element methods. To achieve
computational efficiency, we invoke the cross-flow equilibrium (CFE) concept
between discrete fractures and a small neighborhood in the matrix blocks. We
adopt the mixed hybrid finite element (MHFE) method to approximate convective
Darcy fluxes and the pressure equation. This approach is the most natural
choice for flow in fractured media. The mass balance equations are discretized
by the discontinuous Galerkin (DG) method, which is perhaps the most efficient
approach to capture physical discontinuities in phase properties at the
matrix-fracture interfaces and at phase boundaries. In this work, we account
for gravity and Fickian diffusion. The modeling of capillary effects is
discussed in a separate paper. We present the mathematical framework, using the
implicit-pressure-explicit-composition (IMPEC) scheme, which facilitates
rigorous thermodynamic stability analyses and the computation of phase behavior
effects to account for transfer of species between the phases. A deceptively
simple CFL condition is implemented to improve numerical stability and
accuracy. We provide six numerical examples at both small and larger scales and
in two and three dimensions, to demonstrate powerful features of the
formulation.


title: Scalar Field Theories On The World Sheet: Cutoff Independent Treatment

abstract:
  Following earlier work on the same topic, we consider once more scalar field
theories on the world sheet parametrized by the light cone coordinates. For
most of the way, we use the same approach as in the previous work, but there is
an important new development. To avoid the light cone singularity at p^{+}=0,
one world sheet coordinate had to be discretized, introducing a cutoff into the
model.In the earlier work, this cutoff could not be removed, making the model
unreliable. In the present article, we show that, by a careful choice of the
mass counter term, both the infrared singularity at p^{+}=0 and the ultraviolet
mass divergences can be simultaneously eliminated. We therefore finally have a
cutoff independent model on a continuously parametrized world sheet. We study
this model in the mean field approximation, and as before, we find solitonic
solutions. Quantizing the solitonic collective coordinates gives rise to a
string like model. However, in contrast to the standard string model, the
trajectories here are not in general linear but curved.


title: Dimension Independent Matrix Square using MapReduce

abstract:
  We compute the singular values of an $m \times n$ sparse matrix $A$ in a
distributed setting, without communication dependence on $m$, which is useful
for very large $m$. In particular, we give a simple nonadaptive sampling scheme
where the singular values of $A$ are estimated within relative error with
constant probability. Our proven bounds focus on the MapReduce framework, which
has become the de facto tool for handling such large matrices that cannot be
stored or even streamed through a single machine.
  On the way, we give a general method to compute $A^TA$. We preserve singular
values of $A^TA$ with $\epsilon$ relative error with shuffle size
$O(n^2/\epsilon^2)$ and reduce-key complexity $O(n/\epsilon^2)$. We further
show that if only specific entries of $A^TA$ are required and $A$ has
nonnegative entries, then we can reduce the shuffle size to $O(n \log(n) / s)$
and reduce-key complexity to $O(\log(n)/s)$, where $s$ is the minimum cosine
similarity for the entries being estimated. All of our bounds are independent
of $m$, the larger dimension. We provide open-source implementations in Spark
and Scalding, along with experiments in an industrial setting.


title: Integrability cases for the anharmonic oscillator equation

abstract:
  Using N. Euler's theorem on the integrability of the general anharmonic
oscillator equation \cite{12}, we present three distinct classes of general
solutions of the highly nonlinear second order ordinary differential equation
$\frac{d^{2}x}{dt^{2}}+f_{1}\left(t\right) \frac{dx}{dt}+f_{2}\left(t\right)
x+f_{3}\left(t\right) x^{n}=0$. The first exact solution is obtained from a
particular solution of the point transformed equation
$d^{2}X/dT^{2}+X^{n}\left(T\right) =0$, $n\notin \left\{-3,-1,0,1\right\} $,
which is equivalent to the anharmonic oscillator equation if the coefficients
$f_{i}(t)$, $i=1,2,3$ satisfy an integrability condition. The integrability
condition can be formulated as a Riccati equation for $f_{1}(t)$ and
$\frac{1}{f_{3}(t)}\frac{df_{3}}{dt}$ respectively. By reducing the
integrability condition to a Bernoulli type equation, two exact classes of
solutions of the anharmonic oscillator equation are obtained.


title:
Orbital control of noncollinear magnetic order in nickelate
  heterostructures

abstract:
  We have used resonant x-ray diffraction to develop a detailed description of
antiferromagnetic ordering in epitaxial superlattices based on two-unit-cell
thick layers of the strongly correlated metal LaNiO3. We also report reference
experiments on thin films of PrNiO3 and NdNiO3. The resulting data indicate a
spiral state whose polarization plane can be controlled by adjusting the Ni
d-orbital occupation via two independent mechanisms: epitaxial strain and
quantum confinement of the valence electrons. The data are discussed in the
light of recent theoretical predictions.


title: The Curious Radial Distributions of Horizontal Branch Stars in NGC 6441

abstract:
  NGC 6441 is one of the most massive and most metal-rich globular clusters in
the galaxy, and is noted for an unusual extended horizontal branch which
reaches past the instability strip. We find evidence that there are two
different populations of stars within the heavily-populated red clump. Once a
differential reddening correction is applied, a large but compact group of
stars is found at the faint red end of the clump in the color magnitude
diagram. Brighter, bluer stars in the clump are found to be more centrally
concentrated within the cluster at very high level of significance. Curiously,
the blue horizontal branch stars show a more complex distribution, and are not
more centrally concentrated than the brighter red clump stars. The spatial
distributions of clump stars is in agreement with the idea that the the
brighter bluer part of the clump is a helium-enriched second generation. The
blue horizontal branch stars may be showing evidence that they are being
dynamically evaporated.


title:
Disentangling flow and nonflow correlations via Bayesian unfolding of
  the event-by-event distributions of harmonic coefficients in
  ultrarelativistic heavy-ion collisions

abstract:
  The performance of the Bayesian unfolding method in extracting the
event-by-event (EbyE) distributions of harmonic flow coefficients v_n is
investigated using a toy model simulation, as well as simulations based on the
HIJING and AMPT models. The unfolding method is shown to recover the input
v_2-v_4 distributions for multiplicities similar to those observed in Pb+Pb
collisions at the LHC. The effects of the nonflow are evaluated using HIJING
simulation with and without a flow afterburner. The probability distribution of
v_n resulting only from nonflow in HIJING is nearly a Gaussian and can be
largely suppressed in the data-driven unfolding method used by the ATLAS
Collaboration. The residual nonflow effects have no appreciable impact on the
v_3 distributions, but are found to affect the tails of the v_2 and v_4
distributions; these effects manifest as a small simultaneous change in the
mean and standard deviation of the $v_n$ distributions. For the AMPT model,
which contains both flow fluctuations and nonflow effects, the reduced shape of
the extracted v_n distributions is found to be independent of pT in the low pT
region, similar to what is observed in the ATLAS data. The prospect of using
the EbyE distribution of the harmonic spectrum aided by the unfolding technique
as a general tool to study azimuthal correlations in high energy collisions is
also discussed.


title: Exploring Double Field Theory

abstract:
  We present a flux formulation of Double Field Theory, in which geometric and
non-geometric fluxes are dynamical and field-dependent. Gauge consistency
imposes a set of quadratic constraints on the dynamical fluxes, which can be
solved by truly double configurations. The constraints are related to
generalized Bianchi Identities for (non-)geometric fluxes in the double space,
sourced by (exotic) branes. Following previous constructions, we then obtain
generalized connections, torsion and curvatures compatible with the consistency
conditions. The strong constraint-violating terms needed to make contact with
gauged supergravities containing duality orbits of non-geometric fluxes,
systematically arise in this formulation.


title:
Spin-orbit coupling induced Fulde-Ferrell-Larkin-Ovchinnikov-like Cooper
  pairing and skyrmion-like polarization textures in trapped optical lattices

abstract:
  We study the interplay between the Zeeman field and spin-orbit coupling (SOC)
in harmonically trapped Fermi gases loaded into a two-dimensional single-band
tight-binding optical lattice. Using the Bogoliubov-de Gennes theory, we find
that the Zeeman field combined with a Rashba SOC gives rise to $(i)$
Fulde-Ferrell-like superfluidity and $(ii)$ skyrmion-like polarization textures
near the edges of the system. We also discussed the effects of interaction,
temperature, SOC anisotropy and Zeeman field anisotropy on the superfluid
ground state and polarization textures.


title: The SL(2,R) totally constrained model: three quantization approaches

abstract:
  We provide a detailed comparison of the different approaches available for
the quantization of a totally constrained system with a constraint algebra
generating the non-compact $SL(2,\mathbb{R})$ group. In particular, we consider
three schemes: the Refined Algebraic Quantization, the Master Constraint
Programme and the Uniform Discretizations approach. For the latter, we provide
a quantum description where we identify semiclassical sectors of the
kinematical Hilbert space. We study the quantum dynamics of the system in order
to show that it is compatible with the classical continuum evolution. Among
these quantization approaches, the Uniform Discretizations provides the simpler
description in agreement with the classical theory of this particular model,
and it is expected to give new insights about the quantum dynamics of more
realistic totally constrained models such as canonical general relativity.


title:
In situ comparison of the critical current density in $Y Ba_2 Cu_3
  O_{7-\delta}$ thin films measured by the screening technique under two
  criteria

abstract:
  In this investigation we report the determination of the critical current
density $J_c$ flowing in a
$\mathrm{Y}\mathrm{Ba}_2\mathrm{Cu}_3\mathrm{O}_{7-\delta}$ superconducting
thin film. Estimation of $J_c$ was carried out by an inductive technique, the
so-called screening technique, in which both the imaginary part of the
fundamental harmonic of susceptibility $\chi''_1$ and third harmonic voltage
$V_3$ criteria were considered for the determination of the full penetration
field. In order to verify the reliability of this technique under two criteria,
we investigated the homogeneity of $J_c$ via transport measurements conducted
on four microbridges patterned in the same film. Based on the transport method
we found that both techniques yield similar results in the determination of
$J_c$ for temperatures close to critical temperature $T_c$. However, at
temperatures relatively far from $T_c$, the $V_3$ criterion showed a better
agreement with the transport data. Furthermore, using both criteria, we propose
a methodology to estimate in situ the coil factor associated with the $V_3$
criterion, avoiding in this way the need of implementing an additional
technique.


title: A Spatial Characterization of the Sagittarius Dwarf Galaxy Tidal Tails

abstract:
  We measure the spatial density of F turnoff stars in the Sagittarius dwarf
tidal stream, from Sloan Digital Sky Survey (SDSS) data, using statistical
photometric parallax. We find a set of continuous, consistent parameters that
describe the leading Sgr stream's position, direction, and width for 15 stripes
in the North Galactic Cap, and 3 stripes in the South Galactic Cap. We produce
a catalog of stars that has the density characteristics of the dominant leading
Sgr tidal stream that can be compared with simulations. We find that the width
of the leading (North) tidal tail is consistent with recent triaxial and
axisymmetric halo model simulations. The density along the stream is roughly
consistent common disruption models in the North, but possibly not in the
South. We explore the possibility that one or more of the dominant Sgr streams
has been mis-identified, and that one or more of the `bifurcated' pieces is the
real Sgr tidal tail, but we do not reach definite conclusions. If two dwarf
progenitors are assumed, fits to the planes of the dominant and `bifurcated'
tidal tails favor an association of the Sgr dwarf spheroidal galaxy with the
dominant Southern stream and the `bifurcated' stream in the North. In the North
Galactic Cap, the best fit Hernquist density profile for the smooth component
of the stellar halo is oblate, with a flattening parameter q = 0.53, and a
scale length of r_0 = 6.73. The Southern data for both the tidal debris and the
smooth component of the stellar halo do not match the model fits to the North,
although the stellar halo is still overwhelmingly oblate. Finally, we verify
that we can reproduce the parameter fits on the asynchronous Milkyway@home
volunteer computing platform.


title:
Invariant Gibbs measure evolution for the radial nonlinear wave equation
  on the 3D ball

abstract:
  We establish new global well-posedness results along Gibbs measure evolution
for the nonlinear wave equation posed on the unit ball in $\mathbb{R}^3$ via
two distinct approaches. The first approach invokes the method established in
the works \cite{B1,B2,B3} based on a contraction-mapping principle and applies
to a certain range of nonlinearities. The second approach allows to cover the
full range of nonlinearities admissible to treatment by Gibbs measure, working
instead with a delicate analysis of convergence properties of solutions. The
method of the second approach is quite general, and we shall give applications
to the nonlinear Schr\"odinger equation on the unit ball in subsequent works
\cite{BB1,BB2}.


title: Earth Occultation Imaging of the Low Energy Gamma-Ray Sky with GBM

abstract:
  The Earth Occultation Technique (EOT) has been applied to Fermi's Gamma-ray
Burst Monitor (GBM) to perform all-sky monitoring for a predetermined catalog
of hard X-ray/soft gamma-ray sources. In order to search for sources not in the
catalog, thus completing the catalog and reducing a source of systematic error
in EOT, an imaging method has been developed -- Imaging with a Differential
filter using the Earth Occultation Method (IDEOM). IDEOM is a tomographic
imaging method that takes advantage of the orbital precession of the Fermi
satellite. Using IDEOM, all-sky reconstructions have been generated for ~sim 4
years of GBM data in the 12-50 keV, 50-100 keV and 100-300 keV energy bands in
search of sources otherwise unmodeled by the GBM occultation analysis. IDEOM
analysis resulted in the detection of 57 sources in the 12-50 keV energy band,
23 sources in the 50-100 keV energy band, and 7 sources in the 100-300 keV
energy band. Seventeen sources were not present in the original GBM-EOT catalog
and have now been added. We also present the first joined averaged spectra for
four persistent sources detected by GBM using EOT and by the Large Area
Telescope (LAT) on Fermi: NGC 1275, 3C 273, Cen A, and the Crab.


title:
The partonic structure of the nucleon from generalized transverse
  momentum-dependent parton distributions

abstract:
  We discuss the general formalism for the calculation in light-front quark
models of the fully unintegrated, off-diagonal quark-quark correlator of the
nucleon, parametrized in terms of generalized transverse momentum dependent
parton distributions (GTMDs). By taking specific limits or projections, these
GTMDs yield various transverse-momentum dependent and generalized parton
distributions, thus providing a unified framework to simultaneously model
different observables. The corresponding distributions in impact-parameter
space are the Wigner functions which provide multidimensional images of the
quark distributions in phase space. We present results within a light-front
constituent quark model, discussing some of the complementary aspects encoded
in the different distributions and the relation to the quark orbital angular
momentum of the proton.


title: Anomalous magnetic moment of an electron near a dispersive surface

abstract:
  Changes in the magnetic moment of an electron near a dielectric or conducting
surface due to boundary-dependent radiative corrections are investigated. The
electromagnetic field is quantized by normal mode expansion for a
non-dispersive dielectric and an undamped plasma, but the electron is described
by the Dirac equation without matter-field quantization. Perturbation theory in
the Dirac equation leads to a general formula for the magnetic moment shift in
terms of integrals over products of electromagnetic mode functions. In each of
the models investigated contour integration techniques over a complex wave
vector can be used to derive a general formula featuring just integrals over
transverse electric and transverse magnetic reflection coefficients of the
surface. Analysis of the magnetic moment shift for several classes of materials
yields markedly different results from the previously considered simplistic
'perfect reflector' model, due to the inclusion of physically important
features of the electromagnetic response of the surface such as evanescent
field modes and dispersion in the material. For a general dispersive dielectric
surface, the magnetic moment shift of a nearby electron can exceed the previous
prediction of the perfect-reflector model by several orders of magnitude.


title: Holographic R-symmetric flows and the \tau_U conjecture

abstract:
  We discuss the holographic counterpart of a recent conjecture regarding
R-symmetric RG-flows in four-dimensional supersymmetric field theories. In such
theories, a quantity \tau_U can be defined at the fixed points which was
conjectured in arXiv:1109.3279 to be larger in the UV than in the IR,
\tau_U^{UV} > \tau_U^{IR}. We analyze this conjecture from a dual supergravity
perspective: using some general properties of domain wall solutions dual to
R-symmetric RG flows, we define a bulk quantity which interpolates between the
correct \tau_U at the UV and IR fixed points, and study its monotonicity
properties in a class of examples. We find a monotonic behavior for theories
flowing to an interacting IR fixed point. For gapped theories, the monotonicity
is still valid up to a finite value of the radial coordinate where the function
vanishes, reflecting the gap scale of the field theory.


title: Implications of the AMS-02 positron fraction in cosmic rays

abstract:
  The AMS-02 collaboration has just released its first result of the cosmic
positron fraction $e^+/(e^-+e^+)$ with high precision up to $\sim 350$ GeV. The
AMS-02 result shows the same trend with the previous PAMELA result, which
requires extra electron/positron sources on top of the conventional cosmic ray
background, either from astrophysical sources or from dark matter
annihilation/decay. In this paper we try to figure out the nature of the extra
sources by fitting to the AMS-02 $e^+/(e^-+e^+)$ data, as well as the electron
and proton spectra by PAMELA and the $(e^-+e^+)$ spectrum by Fermi and HESS. We
adopt the GALPROP package to calculate the propagation of the Galactic cosmic
rays and the Markov Chain Monte Carlo sampler to do the fit. We find that the
AMS-02 data have implied essential difference from the PAMELA data. There is
{\rm tension} between the AMS-02 $e^+/(e^-+e^+)$ data and the Fermi/HESS
$(e^-+e^+)$ spectrum, that the AMS-02 data requires less contribution from the
extra sources than Fermi/HESS. Then we redo the fit without including the
Fermi/HESS data. In this case both the pulsars and dark matter
annihilation/decay can explain the AMS-02 data. The pulsar scenario has a soft
inject spectrum with the power-law index $\sim 2$, while the dark matter
scenario needs $\tau^+\tau^-$ final state with mass $\sim 600$ GeV and a boost
factor $\sim 200$.


title:
Recent Result of the AMS-02 Experiment and Decaying Gravitino Dark
  Matter in Gauge Mediation

abstract:
  The AMS-02 collaboration has recently reported an excess of cosmic-ray
positron fractions, which is consistent with previous results at PAMELA and
Fermi-LAT experiments. The result indicates the existence of new physics
phenomena to provide the origin of the energetic cosmic-ray positron. We pursue
the possibility that the enhancement of the positron fraction is due to the
decay of gravitino dark matter. We discuss that such a scenario viably fits
into the models in which the soft SUSY breaking parameters are dominantly from
gauge-mediation mechanism with superparticle masses of around 10 TeV. Our
scenario is compatible with ~126 GeV Higgs boson, negative searches for SUSY
particles, and non-observation of anomalous FCNC processes. We also point out
that the scenario will be tested in near future by measuring the electric
dipole moment of the electron and the lepton flavor violating decay of the
muon.


title:
Determining the Nature of the Extended HI Structure Around LITTLE THINGS
  Dwarf Galaxy NGC 1569

abstract:
  This work presents an extended, neutral Hydrogen emission map around
Magellanic-type dwarf irregular galaxy (dIm) NGC 1569. In the Spring of 2010,
the Robert C. Byrd Green Bank Telescope (GBT) was used to map a 9 degree x 2
degree region in HI line emission that includes NGC 1569 and IC 342 as well as
two other dwarf galaxies. The primary objective for these observations was to
search for structures potentially connecting NGC 1569 with IC 342 group members
in order to trace previous interactions and thus, provide an explanation for
the starburst and peculiar kinematics prevalent in NGC 1569. A large,
half-degree diameter HI cloud was detected that shares the same position and
velocity as NGC 1569. Also, two long structures were discovered that are
reminiscent of intergalactic filaments extending out in a v-shaped manner from
NGC 1569 toward UGCA 92, a nearby dwarf galaxy. These filamentary structures
extend for about 1.5 degrees, which is 77 kpc at NGC 1569. There is a
continuous velocity succession with the 0.5 degree HI cloud, filaments, and
main body of the galaxy. The 0.5 degree HI cloud and filamentary structures may
be foreground Milky Way, but are suggestive as possible remnants of an
interaction between NGC 1569 and UGCA 92. The data also show two tidal tails
extending from UGCA 86 and IC 342, respectively. These structures may be part
of a continuous HI bridge but more data are needed to determine if this is the
case.


title:
Testing the Effect of Hydrophilic and Hydrophobic Coatings on the Speed
  of a Ball through Water

abstract:
  Data is presented that confirms that hydrophobic coatings reduce friction
between objects and water. The results show that the average time it took for
the ball with the hydrophobic coating traveled at an average of about 6 inches
per second. The ball with the hydrophilic coating traveled at a slower pace,
moving at an average of about 5 inches per second and the ball without a
coating traveled at an average of about 4.8 inches per second.


title:
Colored HOMFLY polynomials as multiple sums over paths or standard Young
  tableaux

abstract:
  If a knot is represented by an m-strand braid, then HOMFLY polynomial in
representation R is a sum over characters in all representations Q\in
R^{\otimes m}. Coefficients in this sum are traces of products of quantum
R-matrices along the braid, but these matrices act in the space of
intertwiners, and their size is equal to the multiplicity M_{RQ} of Q in
R^{\otimes m}. If R is the fundamental representation R=[1], then M_{[1] Q} is
equal to the number of paths in representation graph, which lead from the
fundamental vertex [1] to the vertex Q. In the basis of paths the entries of
the m-1 relevant R-matrices are associated with the pairs of paths and are
non-vanishing only when the two paths either coincide or differ by at most one
vertex; as a corollary R-matrices consist of just 1x1 and 2x2 blocks, given by
very simple explicit expressions. If cabling method is used to color the knot
with the representation R, then the braid has m|R| strands, Q have a bigger
size m|R|, but only paths passing through the vertex R are included into the
sums over paths which define the products and traces of the m|R|-1 relevant
R-matrices. In the case of SU(N) this path sum formula can also be interpreted
as a multiple sum over the standard Young tableaux. By now it provides the most
effective way for evaluation of the colored HOMFLY polynomials, conventional or
extended, for arbitrary braids.


title:
AA Tau's sudden and long-lasting deepening: enhanced extinction by its
  circumstellar disk

abstract:
  AA Tau has been monitored for more than 20 years since 1987, exhibiting a
nearly constant brightness level of V=12.5 mag. We report here that in 2011 it
suddenly faded away, becoming 2 magnitudes fainter in the V-band, and has
remained in this deep state since then. We report new optical and near-IR
photometry and spectroscopy obtained during the fading event. The system
appears much redder and fainter than it was in the bright state. Also, the 8.2d
photometric period continuously observed for more than 20 years is not seen
during most of the deep state. The analysis of the system's brightness and
colors suggests that the visual extinction on the line of sight has increased
by about 3-4 magnitudes in the deep state. At optical wavelengths, the system
appears to be dominated by scattered light, probably originating from the upper
surface layers of a highly inclined circumstellar disk. The profiles of the
Balmer lines have significantly changed as well, with the disappearance of a
central absorption component regularly observed in the bright state. We ascribe
this change to the scattering of the system's spectrum by circumstellar dust.
Noticeably, the mass accretion rate in the inner disk and onto the central star
has not changed as the system faded away. We conclude that the deepening of the
AA Tau system is due to a sudden increase of circumstellar dust extinction on
the line of sight without concomitant change in the accretion rate. We suggest
that the enhanced obscuration may be produced by a non-axisymmetric overdense
region in the disk, located at a distance of 7.7 AU or more, that was recently
brought on the line of sight by its keplerian motion around the central star.