title:
Field-Theoretic Weyl Deformation Quantization of Enlarged Poisson
  Algebras

abstract:
  $C^*$-algebraic Weyl quantization is extended by allowing also degenerate
pre-symplectic forms for the Weyl relations with infinitely many degrees of
freedom, and by starting out from enlarged classical Poisson algebras. A
powerful tool is found in the construction of Poisson algebras and
non-commutative twisted Banach-$*$-algebras on the stage of measures on the not
locally compact test function space. Already within this frame strict
deformation quantization is obtained, but in terms of Banach-$*$-algebras
instead of $C^*$-algebras. Fourier transformation and representation theory of
the measure Banach-$*$-algebras are combined with the theory of continuous
projective group representations to arrive at the genuine $C^*$-algebraic
strict deformation quantization in the sense of Rieffel and Landsman. Weyl
quantization is recognized to depend in the first step functorially on the (in
general) infinite dimensional, pre-symplectic test function space; but in the
second step one has to select a family of representations, indexed by the
deformation parameter $\hbar$. The latter ambiguity is in the present
investigation connected with the choice of a folium of states, a structure,
which does not necessarily require a Hilbert space representation.


title: From the hyperbolic 24-cell to the cuboctahedron

abstract:
  We describe a family of 4-dimensional hyperbolic orbifolds, constructed by
deforming an infinite volume orbifold obtained from the ideal, hyperbolic
24-cell by removing two walls. This family provides an infinite number of
infinitesimally rigid, infinite covolume, geometrically finite discrete
subgroups of the isometry group of hyperbolic 4-space. It also leads to finite
covolume Coxeter groups which are the homomorphic image of the group of
reflections in the hyperbolic 24-cell. The examples are constructed very
explicitly, both from an algebraic and a geometric point of view. The method
used can be viewed as a 4-dimensional, but infinite volume, analog of
3-dimensional hyperbolic Dehn filling.


title:
Enhancement of the Deuteron-Fusion Reactions in Metals and its
  Experimental Implications

abstract:
  Recent measurements of the reaction d(d,p)t in metallic environments at very
low energies performed by different experimental groups point to an enhanced
electron screening effect. However, the resulting screening energies differ
strongly for divers host metals and different experiments. Here, we present new
experimental results and investigations of interfering processes in the
irradiated targets. These measurements inside metals set special challenges and
pitfalls which make them and the data analysis particularly error-prone. There
are multi-parameter collateral effects which are crucial for the correct
interpretation of the observed experimental yields. They mainly originate from
target surface contaminations due to residual gases in the vacuum as well as
from inhomogeneities and instabilities in the deuteron density distribution in
the targets. In order to address these problems an improved differential
analysis method beyond the standard procedures has been implemented. Profound
scrutiny of the other experiments demonstrates that the observed unusual
changes in the reaction yields are mainly due to deuteron density dynamics
simulating the alleged screening energy values. The experimental results are
compared with different theoretical models of the electron screening in metals.
The Debye-H\"{u}ckel model that has been previously proposed to explain the
influence of the electron screening on both nuclear reactions and radioactive
decays could be clearly excluded.


title: Non-Abelian Strings in Hot or Dense QCD

abstract:
  Different types of non-Abelian vortex-strings appear in dense or hot QCD,
both of which possess non-Abelian internal orientation zero modes. We calculate
the interaction between them and find the universal repulsion for dense QCD
(color superconductivity) and the dependence on the orientations for hot QCD
(chirally broken phase). This is a review article based on our papers
arXiv:0708.4092 and arXiv:0708.4096.


title: Mirror Energy Differences and nuclear structure in 1$f_{7/2}$ nuclei

abstract:
  Experimental mirror energy differences (MED) for nuclei lying in the middle
and the second part of $1f_{7/2}$ shell are compared with shell model
calculations in the $1f_{7/2}$ and in the full $pf$ configuration spaces, as
well as with CSM calculations. MED plots are fully consistent with the
description which emerges from the interpretation of SM calculations: i.e. the
band crossing of the gs band with high-$K$ bands in $A$=51 and 50 mirror pairs,
as well as the seniority-3 quasi band-termination at $I^\pi$=19/2$^-$ in
$A$=49.
  Rotational alignment effects are excluded, contrarily to what even recently
proposed.
  Some inconsistencies, as well as definition improprieties, are pointed out in
the topical literature.


title: Cosmological evolution of the Fanaroff-Riley type II source population

abstract:
  By combining a model for the evolution of the radio luminosity of an
individual source with the radio luminosity function, we perform a
multi-dimensional Monte-Carlo simulation to investigate the cosmological
evolution of the Fanaroff-Riley Class II radio galaxy population by generating
large artificial samples. The properties of FRII sources are required to evolve
with redshift in the artificial samples to fit the observations. Either the
maximum jet age or the maximum density of the jet environment or both evolve
with redshift. We also study the distribution of FRII source properties as a
function of redshift. From currently available data we can not constrain the
shape of the distribution of environment density or age, but jet power is found
to follow a power-law distribution with an exponent of approximately -2. This
power-law slope does not change with redshift out to z=0.6. We also find the
distribution of the pressure in the lobes of FRII sources to evolve with
redshift up to $z\sim1.2$.


title: One-Loop Effective Action in Orbifold Compactifications

abstract:
  We employ the covariant background formalism to derive generic expressions
for the one-loop effective action in field theoretic orbifold
compactifications. The contribution of each orbifold sector is given by the
effective action of its fixed torus with a shifted mass matrix. We thus study
in detail the computation of the heat kernel on tori. Our formalism manifestly
separates UV sensitive (local) from UV-insensitive (nonlocal) renormalization.
To exemplify our methods, we study the effective potential of 6d gauge theory
as well as kinetic terms for gravitational moduli in 11d supergravity.


title:
Determination of the basis of the space of all root functionals of a
  system of polynomial equations and of the basis of its ideal by the operation
  of the extension of bounded root functionals

abstract:
  It is proposed the algorithm that find a basis of the ideal and a basis of
the space of all root functionals by using the extension operation for bounded
root functionals, when the number of polynomials is equal to the number of
variables, if it is known that the ideal of polynomials is 0-dimensional. The
asyptotic complexity of this algorithm is d^{O(n)} operations, where n is the
number of polynomials and the number of variables, d is the maximal degree of
polynomials. The extension operation has connection with the multivariate
Bezoutian construction.


title: Proton transport and torque generation in rotary biomotors

abstract:
  We analyze the dynamics of rotary biomotors within a simple
nano-electromechanical model, consisting of a stator part and a ring-shaped
rotor having twelve proton-binding sites. This model is closely related to the
membrane-embedded F$_0$ motor of adenosine triphosphate (ATP) synthase, which
converts the energy of the transmembrane electrochemical gradient of protons
into mechanical motion of the rotor. It is shown that the Coulomb coupling
between the negative charge of the empty rotor site and the positive stator
charge, located near the periplasmic proton-conducting channel (proton source),
plays a dominant role in the torque-generating process. When approaching the
source outlet, the rotor site has a proton energy level higher than the energy
level of the site, located near the cytoplasmic channel (proton drain). In the
first stage of this torque-generating process, the energy of the
electrochemical potential is converted into potential energy of the
proton-binding sites on the rotor. Afterwards, the tangential component of the
Coulomb force produces a mechanical torque. We demonstrate that, at low
temperatures, the loaded motor works in the shuttling regime where the energy
of the electrochemical potential is consumed without producing any
unidirectional rotation. The motor switches to the torque-generating regime at
high temperatures, when the Brownian ratchet mechanism turns on. In the
presence of a significant external torque, created by ATP hydrolysis, the
system operates as a proton pump, which translocates protons against the
transmembrane potential gradient. Here we focus on the F$_0$ motor, even though
our analysis is applicable to the bacterial flagellar motor.


title: Not so non-renormalizable gravity

abstract:
  We review recent progress with the understanding of quantum fields, including
ideas how gravity might turn out to be a renormalizable theory after all.


title: Entangled Dynamics of a Stiff Polymer

abstract:
  Entangled networks of stiff biopolymers exhibit complex dynamic response,
emerging from the topological constraints that neighboring filaments impose
upon each other. We propose a class of reference models for entanglement
dynamics of stiff polymers and provide a quantitative foundation of the tube
concept for stiff polymers. For an infinitely thin needle exploring a planar
course of point obstacles, we have performed large-scale computer simulations
proving the conjectured scaling relations from the fast transverse
equilibration to the slowest process of orientational relaxation. We determine
the rotational diffusion coefficient of the tracer, its angular confinement,
the tube diameter and the orientational correlation functions.


title:
Two dimensional adelic analysis and cuspidal automorphic representations
  of GL(2)

abstract:
  Two dimensional adelic objects were introduced by I. Fesenko in his study of
the Hasse zeta function associated to a regular model $\mathcal E$ of the
elliptic curve $E$. The Hasse-Weil $L$-function $L(E,s)$ of $E$ appears in the
denominator of the Hasse zeta function of $\mathcal E$. The two dimensional
adelic analysis predicts that the integrand $h$ of the boundary term of the two
dimensional zeta integral attached to $\mathcal E$ is mean-periodic. The
mean-periodicity of $h$ implies the meromorphic continuation and the functional
equation of $L(E,s)$. On the other hand, if $E$ is modular, several nice
analytic properties of $L(E,s)$, in particular the analytic continuation and
the functional equation, are obtained by the theory of the cuspical automorphic
representation of GL(2) over the ordinary ring of adele (one dimensional adelic
object). In this article we try to relate the theory of two dimensional adelic
object to the theory of cuspidal automorphic representation of GL(2) over the
one dimensional adelic object, under the assumption that $E$ is modular.
Roughly speaking, they are dual each other.


title:
On Upper Bounds for the Tail Distribution of Geometric Sums of
  Subexponential Random Variables

abstract:
  The approach used by Kalashnikov and Tsitsiashvili for constructing upper
bounds for the tail distribution of a geometric sum with subexponential
summands is reconsidered. By expressing the problem in a more probabilistic
light, several improvements and one correction are made, which enables the
constructed bound to be significantly tighter. Several examples are given,
showing how to implement the theoretical result.


title:
Electric and magnetic field optimization procedure for Penning trap mass
  spectrometers

abstract:
  Significant systematic errors in high-precision Penning trap mass
spectrometry can result from electric and magnetic field imperfections. An
experimental procedure to minimize these uncertainties is presented for the
on-line Penning trap mass spectrometer ISOLTRAP, located at ISOLDE/CERN. The
deviations from the ideal magnetic and electric fields are probed by measuring
the cyclotron frequency and the reduced cyclotron frequency, respectively, of
stored ions as a function of the time between the ejection of ions from the
preparation trap and their capture in the precision trap, which influences the
energy of their axial motion. The correction parameters are adjusted to
minimize the frequency shifts.


title:
Optimal conditions for $L^\infty$-regularity and a priori estimates for
  elliptic systems, I: two components

abstract:
  In this paper we present a new bootstrap procedure for elliptic systems with
two unknown functions. Combining with the $L^p$-$L^q$-estimates, it yields the
optimal $L^\infty$-regularity conditions for the three well-known types of weak
solutions: $H_0^1$-solutions, $L^1$-solutions and $L^1_\delta$-solutions.
Thanks to the linear theory in $L^p_\delta(\Omega)$, it also yields the optimal
conditions for a priori estimates for $L^1_\delta$-solutions. Based on the a
priori estimates, we improve known existence theorems for some classes of
elliptic systems.


title:
Optimal conditions for $L^\infty$-regularity and a priori estimates for
  elliptic systems, II: $n(\geq 3)$ components

abstract:
  In this paper, we present a bootstrap procedure for general elliptic systems
with $n(\geq 3)$ components. Combining with the $L^p$-$L^q$-estimates, it
yields the optimal $L^\infty$-regularity conditions for the three well-known
types of weak solutions: $H_0^1$-solutions, $L^1$-solutions and
$L^1_\delta$-solutions. Thanks to the linear theory in $L^p_\delta(\Omega)$, it
also yields the optimal conditions for a priori estimates for
$L^1_\delta$-solutions. Based on the a priori estimates, we improve known
existence theorems for some classes of elliptic systems.


title:
Pre-equilibrium dilepton production from an anisotropic quark-gluon
  plasma

abstract:
  We calculate leading-order dilepton yields from a quark-gluon plasma which
has a time-dependent anisotropy in momentum space. Such anisotropies can arise
during the earliest stages of quark-gluon plasma evolution due to the rapid
longitudinal expansion of the created matter. Two phenomenological models for
the proper time dependence of the parton hard momentum scale, p_hard, and the
plasma anisotropy parameter, xi, are constructed which describe the transition
of the plasma from its initial non-equilibrium state to an isotropic
thermalized state. The first model constructed interpolates between 1+1
dimensional free streaming at early times and 1+1 dimensional ideal
hydrodynamical expansion at late times. In the second model we include the
effect of collisional broadening of the parton distribution functions in the
early-time pre-equilibrium stage of plasma evolution. We find for both cases
that for fixed initial conditions high-energy dilepton production is enhanced
by pre-equilibrium emission. When the models are constrained to fixed final
pion multiplicity the dependence of the resulting spectra on the assumed plasma
isotropization time is reduced. Using our most realistic
collisionally-broadened model we find that high-transverse momentum dilepton
production would be enhanced by at most 40% at the Relativistic Heavy Ion
Collider and 50% at CERN Large Hadron Collider if one assumes an
isotropization/thermalization time of 2 fm/c. Given sufficiently precise
experimental data this enhancement could be used to determine the plasma
isotropization time experimentally.


title: Bidifferential graded algebras and integrable systems

abstract:
  In the framework of bidifferential graded algebras, we present universal
solution generating techniques for a wide class of integrable systems.


title: Static Black Hole dressed with a massive Scalar field

abstract:
  A four-dimensional static black hole solution of Einstein equation
conformally coupled to a massive and self interacting scalar field is obtained.
A nontrivial scalar solution proposes a weak scalar hair. A dressed black hole
shows a trace of scalar charge in the metric signalling the presence of scalar
hair. A number of metrics with regular horizons and temperatures are also
proposed.


title:
Non-Hamiltonian dynamics in optical microcavities resulting from
  wave-inspired corrections to geometric optics

abstract:
  We introduce and investigate billiard systems with an adjusted ray dynamics
that accounts for modifications of the conventional reflection of rays due to
universal wave effects. We show that even small modifications of the specular
reflection law have dramatic consequences on the phase space of classical
billiards. These include the creation of regions of non-Hamiltonian dynamics,
the breakdown of symmetries, and changes in the stability and morphology of
periodic orbits. Focusing on optical microcavities, we show that our adjusted
dynamics provides the missing ray counterpart to previously observed wave
phenomena and we describe how to observe its signatures in experiments. Our
findings also apply to acoustic and ultrasound waves and are important in all
situations where wavelengths are comparable to system sizes, an increasingly
likely situation considering the systematic reduction of the size of electronic
and photonic devices.


title: The Caustic Ring Model of the Milky Way Halo

abstract:
  We present a proposal for the full phase space distribution of the Milky Way
halo. The model is axially and reflection symmetric and its time evolution is
self-similar. It describes the halo as a set of discrete dark matter flows with
stated densities and velocity vectors everywhere. We first discuss the general
conditions under which the time evolution of a cold collisionless
self-gravitating fluid is self-similar, and show that symmetry is not necessary
for self-similarity. When spherical symmetry is imposed, the model is the same
as described by Fillmore and Goldreich, and by Bertschinger, twenty-three years
ago. The spherically symmetric model depends on one dimensionless parameter
$\epsilon$ and two dimensionful parameters. We set $\epsilon$ = 0.3, a value
consistent with the slope of the power spectrum of density perturbations on
galactic scales. The dimensionful parameters are determined by the Galactic
rotation velocity (220 km/s) at the position of the Sun and by the age of the
Galaxy (13.7 Gyr). The properties of the outer caustics are derived in the
spherically symmetric model. The structure of the inner halo depends on the
angular momentum distribution of the dark matter particles. We assume that
distribution to be axial and reflection symmetric, and dominated by net overall
rotation. The inner caustics are rings whose radii are determined in terms of a
single additional parameter $j_{\rm max}$. We summarize the observational
evidence in support of the model. The evidence is consistent with $j_{\rm max}$
= 0.18 in Concordance Cosmology, equivalent to $j_{\rm max,old}$ = 0.26 in
Einstein - de Sitter cosmology. We give formulas to estimate the flow densities
and velocity vectors anywhere in the Milky Way halo. The properties of the
first forty flows at the location of the Earth are listed.


title: The Cassiopeia A Supernova was of Type IIB

abstract:
  Cassiopeia A is one of the youngest supernova remnants known in the Milky Way
and a unique laboratory for supernova physics. We present an optical spectrum
of the Cassiopeia A supernova near maximum brightness, obtained from
observations of a scattered light echo - more than three centuries after the
direct light of the explosion swept past Earth. The spectrum shows that
Cassiopeia A was a type IIb supernova and originated from the collapse of the
helium core of a red supergiant that had lost most of its hydrogen envelope
prior to exploding. Our finding concludes a longstanding debate on the
Cassiopeia A progenitor and provides new insight into supernova physics by
linking the properties of the explosion to the wealth of knowledge about its
remnant.


title: Orientation control by flow: Exact results and Langevin simulations

abstract:
  Rod shaped objects suspended in a flowing liquid might be orientated by the
velocity, nature of the liquid, the flow and the geometry of the channel
containing the flow. Orientation settings might enhance or inhibit certain
chemical reactions between the objects, other chemicals or with the walls of
vessels holding the flowing suspension. The probability density function (PDF)
describing the orientations of rod shaped objects in a flowing liquid satisfies
a Fokker-Planck equation whose solution is obtained analytically as well as
numerically from Langevin simulations for different flow parameters. The
analytical and numerical methods developed in the present work enable us to
calculate accurately the PDF for a range of the Peclet number $\alpha$ covering
several orders of magnitude, $10^{-4} \le \alpha \le 10^{8}$. We apply these
results to the experimental determination of dichroism and birefringence of the
suspension as a function of $\alpha$.


title: Convex Bodies Associated to Linear Series

abstract:
  In his work on log-concavity of multiplicities, Okounkov showed in passing
that one could associate a convex body to a linear series on a projective
variety, and then use convex geometry to study such linear systems. Although
Okounkov was essentially working in the classical setting of ample line
bundles, it turns out that the construction goes through for an arbitrary big
divisor. Moreover, this viewpoint renders transparent many basic facts about
asymptotic invariants of linear series, and opens the door to a number of
extensions. The purpose of this paper is to initiate a systematic development
of the theory, and to give a number of applications and examples.


title: Rock mechanics modeling based on soft granulation theory

abstract:
  This paper describes application of information granulation theory, on the
design of rock engineering flowcharts. Firstly, an overall flowchart, based on
information granulation theory has been highlighted. Information granulation
theory, in crisp (non-fuzzy) or fuzzy format, can take into account engineering
experiences (especially in fuzzy shape-incomplete information or superfluous),
or engineering judgments, in each step of designing procedure, while the
suitable instruments modeling are employed. In this manner and to extension of
soft modeling instruments, using three combinations of Self Organizing Map
(SOM), Neuro-Fuzzy Inference System (NFIS), and Rough Set Theory (RST) crisp
and fuzzy granules, from monitored data sets are obtained. The main underlined
core of our algorithms are balancing of crisp(rough or non-fuzzy) granules and
sub fuzzy granules, within non fuzzy information (initial granulation) upon the
open-close iterations. Using different criteria on balancing best granules
(information pockets), are obtained. Validations of our proposed methods, on
the data set of in-situ permeability in rock masses in Shivashan dam, Iran have
been highlighted.


title:
Different routes towards oscillatory zoning in the growth of solid
  solutions

abstract:
  Oscillatory zoning, i.e. self-formation of spatial quasi-periodic
oscillations in the composition of solid growing from aqueous solution, is
analyzed theoretically. Keeping in mind systems like (Ba,Sr)SO4 we propose a 1D
model that takes into account the nonideality of the solid solution and the
system asymmetry, in particular, reflecting itself in different solubilities
for such systems. Based on a linear stability analysis different parameter
regions can be identified. Even an ideal solution solution with a sufficiently
large asymmetry can display oscillatory zoning. Numerical simulations
complement the linear stability analysis as well as the qualitative
consideration of the instability development and reveal the nature of the limit
cycles.


title: J/$\psi$ production measurements by the PHENIX experiment at RHIC

abstract:
  Measurements of J/$\psi$ production by the PHENIX experiment in p+p, d+Au,
Cu+Cu and Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV are reviewed. The results
show a suppression beyond what can be explained by cold nuclear matter effects
in the most central Au+Au and to a lesser extent in Cu+Cu collisions. In
addition, the suppression observed at mid rapidity in Au+Au is smaller than at
forward rapidity, a tendency opposite to what is expected from the higher
energy density at mid rapidity. Regeneration, a possible explanation, can be
tested by measuring the elliptic flow parameter v$_2$ of J/$\psi$.


title: Prym-Tyurin varieties via Hecke algebras

abstract:
  Let $G$ denote a finite group and $\pi: Z \to Y$ a Galois covering of smooth
projective curves with Galois group $G$. For every subgroup $H$ of $G$ there is
a canonical action of the corresponding Hecke algebra $\mathbb{Q}[H \backslash
G/H]$ on the Jacobian of the curve $X = Z/H$. To each rational irreducible
representation $\mathcal{W}$ of $G$ we associate an idempotent in the Hecke
algebra, which induces a correspondence of the curve $X$ and thus an abelian
subvariety $P$ of the Jacobian $JX$. We give sufficient conditions on
$\mathcal{W}$, $H$, and the action of $G$ on $Z$, which imply $P$ to be a
Prym-Tyurin variety. We obtain many new families of Prym-Tyurin varieties of
arbitrary exponent in this way.


title:
Dispersion enhancement and damping by buoyancy driven flows in 2D
  networks of capillaries

abstract:
  The influence of a small relative density difference on the displacement of
two miscible liquids is studied experimentally in transparent 2D networks of
micro channels. Both stable displacements in which the denser fluid enters at
the bottom of the cell and displaces the lighter one and unstable displacements
in which the lighter fluid is injected at the bottom and displaces the denser
one are realized. Except at the lowest mean flow velocity U, the average
$C(x,t)$ of the relative concentration satisfies a convection-dispersion
equation. The dispersion coefficient is studied as function of the relative
magnitude of fluid velocity and of the velocity of buoyancy driven fluid
motion. A model is suggested and its applicability to previous results obtained
in 3D media is discussed.


title: Supersymmetric Flavor-Changing Sum Rules as a Tool for b -> s gamma

abstract:
  The search for supersymmetry (SUSY) and other classes of new physics will be
tackled on two fronts, with high energy, direct detection machines, and in high
precision experiments searching for indirect signatures. While each of these
methods has its own strengths, even more can be gained by finding ways to
combine their results. In this paper, we examine one way of bridging these two
types of experiments by calculating sum rules which link physical squark masses
to the flavor-violating squark mixings. These sum rules are calculated for
minimally flavor-violating SUSY theories at both high and low tan(beta). We
also explore how the sum rules could help to disentangle the relative strengths
of different SUSY contributions to b -> s gamma, a favored channel for indirect
searches of new physics. Along the way, we show that the gluino contributions
to b -> s gamma can be very sizable at large tan(beta).


title: Nonlinear effects for coda-type elastic waves in stressed granular media

abstract:
  Experimental results and their interpretations are presented on the nonlinear
acoustic effects of multiple scattered elastic waves in unconsolidated granular
media. Short wave packets with a central frequency higher than the so-called
cut-off frequency of the medium are emitted at one side of the statically
stressed slab of glass beads and received at the other side after multiple
scattering and nonlinear interactions. Typical signals are strongly distorted
compared to their initially radiated shape both due to nonlinearity and
scattering. It is shown that acoustic waves with a deformation amplitude much
lower than the mean static deformation of the contacts in the medium can modify
the elastic properties of the medium, especially for the weak contact skeleton
part. This addresses the problem of reproducibility of granular structures
during and after acoustic excitation, which is necessary to understand in the
non destructive testing of the elastic properties of granular media by acoustic
methods. Coda signal analysis is shown to be a powerful time-resolved tool to
monitor slight modifications in the elastic response of an unconsolidated
granular structure.


title: Computing the viscosity of the QGP on the lattice

abstract:
  I review the recent progress made in calculating shear and bulk viscosity on
the lattice, and discuss ways to improve the calculation.


title: Quantum coherent control of self-induced ultraslow light

abstract:
  Quantum coherent control of slow light for all-optical switching is
investigated in a multi-level system of solids for an understanding of
self-induced ultraslow light. In an optical population shelving system of a
rare-earth doped solid, dynamics of the slow light are presented by using a
third optical field controlling shelved atom population. Unlike two-photon
coherence-based delayed all-optical switching utilizing electromagnetically
induced transparency, the present method relies on one-photon coherence
controlling shelved atom population.


title: Local symplectic algebra of quasi-homogeneous curves

abstract:
  We study the local symplectic algebra of parameterized curves introduced by
V. I. Arnold. We use the method of algebraic restrictions to classify
symplectic singularities of quasi-homogeneous curves. We prove that the space
of algebraic restrictions of closed 2-forms to the germ of an analytic curve is
a finite dimensional vector space. We also show that the action of local
diffeomorphisms preserving the curve on this vector space is determined by the
infinitesimal action of liftable vector fields. We apply these results to
obtain the complete symplectic classification of curves with the semigroups
(3,4,5), (3,5,7), (3,7,8).


title:
Asymptotic expansions for the escape rate of stochastically perturbed
  unimodal maps

abstract:
  The escape rate of a stochastic dynamical system can be found as an expansion
in powers of the noise strength. In previous work the coefficients of such an
expansion for a one-dimensional map were fitted to a general form containing a
few parameters. These parameters were found to be related to the fractal
structure of the repeller of the system. The parameter alpha, the "noise
dimension", remains to be interpreted. This report presents new data for alpha
showing that the relation to the dimensions is more complicated than predicted
in earlier work and oscillates as a function of the map parameter, in contrast
to other dimension-like quantities.


title: Non-geometric String Backgrounds and Worldsheet Algebras

abstract:
  Using worldsheet Hamiltonian methods we derive a charge algebra which
generalizes the Courant bracket to include fluxes of general index type. This
is achieved by coupling a bi-vector to the Hamiltonian of the Polyakov model.
This bracket is useful to describe so-called non-geometric backgrounds and has
been discussed in the mathematics literature by Dmitry Roytenberg.


title: From SPS to RHIC: Maurice and the CERN heavy-ion programme

abstract:
  Maurice Jacob played a key role in bringing together different groups from
the experimental and theoretical nuclear and particle physics communities to
initiate an ultrarelativistic heavy-ion collision program at the CERN SPS, in
order to search for the quark-gluon plasma. I review the history of this
program from its beginnings to the time when the Relativistic Heavy Ion
Collider (RHIC) at Brookhaven National Laboratory (BNL) started operation. I
close by providing a glimpse of the important discoveries made at RHIC and
giving an outlook towards heavy-ion collisions at the Large Hadron Collider
(LHC). During Maurice's life and not least through his perpetually strong
influence, relativistic heavy-ion physics has matured and led to discoveries
that radiate into many other fields of physics. Heavy-ion physicists owe a
great deal to Maurice Jacob.


title:
Intergranular flux pinning in underdoped and overdoped R(1-x)CaxBa2Cu3Oz
  (R=Y,Gd; x=0,0.2) samples

abstract:
  The temperature dependences of AC magnetic susceptibility at different
magnetic field amplitudes and frequencies are investigated for underdoped and
overdoped R(1-x)Ca(x)Ba(2)Cu(3)O(7-delta)(R=Y; Gd and x=0; 0.2) polycrystalline
samples. The activation energy, Ea, for thermally assisted flux flow (TAFF) in
intergranular region is determined. It was established that a correlation
exists between the intergranular critical current and flux pinning activation
energy. In underdoped samples the intergranular current shows S-I-S behaviour
and the activation energy is small, while in overdoped samples the
intergranular current is changed to S-N-S type and the activation energy
increases. 2D pancake vortices are characteristic of underdoped samples, while
3D vortex system exists in overdoped samples. In fact we demonstrate that Ca
substitution not only increases carrier concentration, but improves
intergranular activation energy for TAFF.


title: A Mini-survey of Ultracool Dwarfs at 4.9 GHz

abstract:
  A selection of ultracool dwarfs are known to be radio active, with both
gyrosynchrotron emission and the electron cyclotron maser instability being
given as likely emission mechanisms. To explore whether ultracool dwarfs
previously undetected at 8.5 GHz may be detectable at a lower frequency. We
select a sample of fast rotating ultracool dwarfs with no detectable radio
activity at 8.5 GHz, observing each of them at 4.9 GHz. From the 8 dwarfs in
our sample, we detect emission from 2MASS J07464256+2000321, with a mean flux
level of 286 $\pm$ 24 $\mu Jy$. The light-curve of 2MASS J07464256+2000321, is
dominated towards the end of the observation by a very bright, $\approx $100 %
left circularly polarized burst during which the flux reached 2.4 mJy. The
burst was preceded by a raise in the level of activity, with the average flux
being $\approx$ 160 $\mu Jy$ in the first hour of observation rising to
$\approx$ 400 $\mu Jy$ in the 40 minutes before the burst. During both periods,
there is significant variability. The detection of 100% circular polarization
in the emission at 4.9 GHz points towards the electron cyclotron maser as the
emission mechanism. However, the observations at 4.9 GHz and 8.5 GHz were not
simultaneous, thus the actual fraction of dwarfs capable of producing radio
emission, as well as the fraction of those that show periodic pulsations is
still unclear, as indeed are the relative roles played by the electron
cyclotron maser instability versus gyrosynchrotron emission, therefore we
cannot assert if the previous non-detection at 8.5 GHz was due to a cut-off in
emission between 4.9 and 8.4 GHz, or due to long term variability.


title: On a conjecture of Kottwitz and Rapoport

abstract:
  We prove a conjecture of Kottwitz and Rapoport which implies a converse to
Mazur's Inequality for all split and quasi-split (connected) reductive groups.
These results are related to the non-emptiness of certain affine
Deligne-Lusztig varieties.


title: Unstable motivic homotopy categories in Nisnevich and cdh-topologies

abstract:
  The motivic homotopy categories can be defined with respect to different
topologies and different underlying categories of schemes. For a number of
reasons (mainly because of the Gluing Theorem) the motivic homotopy category
built out of smooth schemes with respect to the Nisnevich topology plays a
distinguished role but in some cases it is very desirable to be able to work
with all schemes instead of the smooth ones. In this paper we prove that, under
the resolution of singularities assumption, the unstable motivic homotopy
category of all schemes over a field with respect to the cdh-topology is almost
equivalent to the unstable motivic homotopy category of smooth schemes over the
same field with respect to the Nisnevich topology. In order to do it we show
that the standard cd-topologies on the category of Noetherian schemes,
including the cdh-topology, satisfy certain conditions which allows one to use
the generalized version of the Brown-Gersten approach to the homotopy theory of
simplicial sheaves.


title: CSW rules for massive matter legs and glue loops

abstract:
  Cachazo-Svrcek-Witten-type Feynman rules for massive matter scalar legs and
pure glue loops are presented, obtained by deriving them directly from the
space-time action. We comment on the derivation and some sample applications,
in particular to calculating one loop effects in pure Yang-Mills theory.
Furthermore, we derive CSW rules for effective Higgs-gluon couplings studied in
the literature. In addition, it is shown how twistor techniques for deriving
canonical field transformations explored for massless scalars extend to
massless fermions.


title:
Homotopy theory of simplicial presheaves in completely decomposable
  topologies

abstract:
  There are two approaches to the homotopy theory of simplicial (pre-)sheaves.
One developed by Joyal and Jardine works for all sites but produces a model
structure which is not finitely generated even in the case of sheaves on a
Noetherian topological space. The other one developed by Brown and Gersten
gives a nice model structure for sheaves on a Noetherian space of finite
dimension but does not extend to all sites. In this paper we define a class of
sites for which a generalized version of the Brown-Gersten approach works.


title:
Trace Anomaly and dimension two gluon condensate above the phase
  transition

abstract:
  The dimension two gluon condensate has been used previously within a simple
phenomenological model to describe power corrections from available lattice
data for the renormalized Polyakov loop and the heavy quark-antiquark free
energy in the deconfined phase of QCD (hep-ph/0505215,hep-ph/0702055). The QCD
trace anomaly of gluodynamics also shows unequivocal inverse temperature power
corrections which may be encoded as dimension two gluon condensate. We analyze
lattice data of the trace anomaly and compare with other determinations of the
condensate from previous references, yielding roughly similar numerical values.


title:
Distance Expanding Random Mappings, Thermodynamic Formalism, Gibbs
  Measures, and Fractal Geometry

abstract:
  In this paper we define distance expanding random dynamical systems. We
develop the appropriate thermodynamic formalism of such systems. We obtain in
particular the existence and uniqueness of invariant Gibbs states, the
appropriate pressure function and exponentially fast convergence of iterates of
Perron-Frobenius operators resulting, in particular, in an exponential decay of
correlations. We also obtain the formula for the derivative of the expected
value of the pressure function. Next, we define and investigate in detail
conformal random expanding repellers. Applying the developed machinery of
thermodynamic formalism we prove a version of Bowen's formula which identifies
the Hausdorff dimension $h$ of almost all fibers with the only zero of expected
value of the pressure function.
  We then turn to more refined fractal properties by, firstly, showing that the
multifractal formalism of the Gibbs states is valid and, secondly, that the
$h$--Hausdorff measure vanishes while the corresponding packing measure is
infinite provided the system is not quasi-deterministic.


title: Angular surface solitons in sectorial hexagonal arrays

abstract:
  We report on the experimental observation of corner surface solitons
localized at the edges joining planar interfaces of hexagonal waveguide array
with uniform nonlinear medium. The face angle between these interfaces has a
strong impact on the threshold of soliton excitation as well as on the light
energy drift and diffraction spreading.


title: Supermassive binary black hole mergers

abstract:
  When galaxies collide, dynamical friction drives their central supermassive
black holes close enought to each other such that gravitational radiation
becomes the leading dissipative effect. Gravitational radiation takes away
energy, momentum and angular momentum from the compact binary, such that the
black holes finally merge. In the process, the spin of the dominant black hole
is reoriented. On observational level, the spins are directly related to the
jets, which can be seen at radio frequencies. Images of the X-shaped radio
galaxies together with evidence on the age of the jets illustrate that the jets
are reoriented, a phenomenon known as spin-flip. Based on the galaxy luminosity
statistics we argue here that the typical galaxy encounters involve mass ratios
between 1:3 to 1:30 for the central black holes. Based on the spin-orbit
precession and gravitational radiation we also argue that for this typical mass
ratio in the inspiral phase of the merger the initially dominant orbital
angular momentum will become smaller than the spin, which will be reoriented.
We prove here that the spin-flip phenomenon typically occurs already in the
inspiral phase, and as such is describable by post-Newtonian techniques.


title: Channels that Heat Up

abstract:
  This work considers an additive noise channel where the time-k noise variance
is a weighted sum of the channel input powers prior to time k. This channel is
motivated by point-to-point communication between two terminals that are
embedded in the same chip. Transmission heats up the entire chip and hence
increases the thermal noise at the receiver. The capacity of this channel (both
with and without feedback) is studied at low transmit powers and at high
transmit powers.
  At low transmit powers, the slope of the capacity-vs-power curve at zero is
computed and it is shown that the heating-up effect is beneficial. At high
transmit powers, conditions are determined under which the capacity is bounded,
i.e., under which the capacity does not grow to infinity as the allowed average
power tends to infinity.


title: Positron potential and wavefunction in LaFeAsO

abstract:
  We report calculations of the positron potential and wavefunction in LaFeAsO.
These calculations show that the positron wavefunction does sample the entire
unit cell although it is largest in the interstices of the La layer adjacent to
As atoms. The implication is that angular correlation of annihilation radiation
(ACAR) is a viable probe of the Fermi surfaces in this material. The results
also apply to positive muons, and indicate that these will be localized in the
La layer adjacent to As.


title: Stepping out of Homogeneity in Loop Quantum Cosmology

abstract:
  We explore the extension of quantum cosmology outside the homogeneous
approximation, using the formalism of loop quantum gravity. We introduce a
model where some of the inhomogeneous degrees of freedom are present, providing
a tool for describing general fluctuations of quantum geometry near the initial
singularity. We show that the dynamical structure of the model reduces to that
of loop quantum cosmology in the Born-Oppenheimer approximation. This result
corroborates the assumptions that ground loop cosmology, sheds light on the
physical and mathematical relation between loop cosmology and full loop quantum
gravity, and on the nature of the cosmological approximation. Finally, we show
that the non-graph-changing Hamiltonian constraint considered in the context of
algebraic quantum gravity provides a viable effective dynamics within this
approximation.


title: Riemann-Hilbert approach to a generalized sine kernel and applications

abstract:
  We investigate the asymptotic behavior of a generalized sine kernel acting on
a finite size interval [-q,q]. We determine its asymptotic resolvent as well as
the first terms in the asymptotic expansion of its Fredholm determinant.
Further, we apply our results to build the resolvent of truncated Wiener--Hopf
operators generated by holomorphic symbols. Finally, the leading asymptotics of
the Fredholm determinant allows us to establish the asymptotic estimates of
certain oscillatory multidimensional coupled integrals that appear in the study
of correlation functions of quantum integrable models.


title:
Non-distributive algebraic structures derived from nonextensive
  statistical mechanics

abstract:
  We propose a two-parametric non-distributive algebraic structure that follows
from $(q,q')$-logarithm and $(q,q')$-exponential functions. Properties of
generalized $(q,q')$-operators are analyzed. We also generalize the proposal
into a multi-parametric structure (generalization of logarithm and exponential
functions and the corresponding algebraic operators). All $n$-parameter
expressions recover $(n-1)$-generalization when the corresponding $q_n\to1$.
Nonextensive statistical mechanics has been the source of successive
generalizations of entropic forms and mathematical structures, in which this
work is a consequence.


title: The maximal number of singular points on log del Pezzo surfaces

abstract:
  We prove that a del Pezzo surface with Picard number one has at most four
singular points.


title: Generalized vector form factors of the pion in a chiral quark model

abstract:
  Generalized vector form factors of the pion, related to the moments of the
generalized parton distribution functions, are evaluated in the
Nambu--Jona-Lasinio model with the Pauli-Villars regularization. The lowest
moments (the electromagnetic and the gravitational form factors) are compared
to recent lattice data, with fair agreement. Predictions for higher-order
moments are also made. Relevant features of the generalized form factors in the
chiral quark models are highlighted and the role of the QCD evolution for the
higher-order GFFs is stressed.


title:
Statistics of quantum transport in chaotic cavities with broken
  time-reversal symmetry

abstract:
  The statistical properties of quantum transport through a chaotic cavity are
encoded in the traces $\T={\rm Tr}(tt^\dag)^n$, where $t$ is the transmission
matrix. Within the Random Matrix Theory approach, these traces are random
variables whose probability distribution depends on the symmetries of the
system. For the case of broken time-reversal symmetry, we present explicit
closed expressions for the average value and for the variance of $\T$ for all
$n$. In particular, this provides the charge cumulants $\Q$ of all orders. We
also compute the moments $<g^n>$ of the conductance $g=\mathcal{T}_1$. All the
results obtained are exact, {\it i.e.} they are valid for arbitrary numbers of
open channels.


title: Energy flux of Alfven waves in weakly ionized plasma

abstract:
  The overshooting convective motions in the solar photosphere are frequently
proposed as the source for the excitation of Alfv\'en waves. However, the
photosphere is a) very weakly ionized, and, b) the dynamics of the plasma
particles in this region is heavily influenced by the plasma-neutral
collisions. The purpose of this work is to check the consequences of these two
facts on the above scenario and their effects on the electromagnetic waves. It
is shown that the ions and electrons in the photosphere are both un-magnetized;
their collision frequency with neutrals is much larger than the gyro-frequency.
This implies that eventual Alfv\'en-type electromagnetic perturbations must
involve the neutrals as well. This has the following serious consequences: i)
in the presence of perturbations, the whole fluid (plasma + neutrals) moves;
ii) the Alfv\'en velocity includes the total (plasma + neutrals) density and is
thus considerably smaller compared to the collision-less case; iii) the
perturbed velocity of a unit volume, which now includes both plasma and
neutrals, becomes much smaller compared to the ideal (collision-less) case; and
iv) the corresponding wave energy flux for the given parameters becomes much
smaller compared to the ideal case.


title:
Mean Curvature Motion of Graphs with Constant Contact Angle and Moving
  Boundaries

abstract:
  We consider the motion by mean curvature of an $n$-dimensional graph over a
time-dependent domain in $\mathbb{R}^n$, intersecting $\mathbb{R}^n$ at a
constant angle. In the general case, we prove local existence for the
corresponding quasilinear parabolic equation with a free boundary, and derive a
continuation criterion based on the second fundamental form. If the initial
graph is concave, we show this is preserved, and that the solution exists only
for finite time. This corresponds to a symmetric version of triple junction
motion of hypersurfaces by mean curvature, with constant angles at the
junction.


title: Quantum deficits and correlations of two superconducting charge qubits

abstract:
  Motivated by recent experiments [Pashkin et al. Nature, \textbf{421}, 823
(2003)] which showed coherent oscillations of two superconducting qubits
system, we consider a system of two charge qubits coupled to a common stripline
microwave resonator. We discuss the separable and entangled behavior as well as
the quantum and classical information deficits. Numerical computation of these
quantities for several regimes is performed. We find that for less entangled
states the partner can extract much more information by means of classical
communication and local operations


title: Radiative and Collisional Jet Energy Loss in a Quark-Gluon Plasma

abstract:
  We calculate radiative and collisional energy loss of hard partons traversing
the quark-gluon plasma created at RHIC and compare the respective size of these
contributions. We employ the AMY formalism for radiative energy loss and
include additionally energy loss by elastic collisions. Our treatment of both
processes is complete at leading order in the coupling, and accounts for the
probabilistic nature of jet energy loss. We find that a solution of the
Fokker-Planck equation for the probability density distributions of partons is
necessary for a complete calculation of the nuclear modification factor
$R_{AA}$ for pion production in heavy ion collisions. It is found that the
magnitude of $R_{AA}$ is sensitive to the inclusion of both collisional and
radiative energy loss, while the average energy is less affected by the
addition of collisional contributions. We present a calculation of $R_{AA}$ for
$\pi^0$ at RHIC, combining our energy loss formalism with a relativistic
(3+1)-dimensional hydrodynamic description of the thermalized medium.


title: The EVLA: Prospects for HI

abstract:
  To continue the unparalleled success of the Very Large Array (VLA) for radio
astronomy, the facility is currently being converted to become the 'Expanded
VLA' (EVLA). The EVLA will radically improve the VLA in order to cover the full
0.93-50 GHz radio wavelength range without gaps, provide up to an order of
magnitude better sensitivity, and to allow observations at much larger
bandwidths and spectral resolution as currently possible. For observations of
the 21 cm line of atomic neutral hydrogen (HI), the EVLA offers thousands of
km/s velocity coverage at sub-km/s resolution for targeted observations as well
as an improved spectral baseline stability. In addition, every L-band (21 cm)
continuum or targeted HI observation can be set-up to simultaneously observe a
full z=0-0.53 HI redshift survey at a velocity resolution of a few km/s. In
turn, every HI observation will also yield deep radio continuum images of the
field. These synergies will deliver a wealth of data which opens up a wide
'discovery space' to study the details of galaxy evolution and cosmology.


title: A Mathematical Approach to the Plato's Problem

abstract:
  Maybe the first inverse problem presented in the history of the occidental
thought is described in the book Republic, written by Plato. The problem is
posed in the Book VII in a text known as the Allegory of the Cave. That text
motivated us to formulate a simple mathematical model that simulates, in a
sense, the situation of the persons described in that problem.


title: A new old class of maximal monotone operators

abstract:
  In a recent paper in Journal of Convex Analysis the authors studied, in
non-reflexive Banach spaces, a class of maximal monotone operators,
characterized by the existence of a function in Fitzpatrick's family of the
operator which conjugate is above the duality product. This property was used
to prove that such operators satisfies a restricted version of
Brondsted-Rockafellar property.
  In this work we will prove that if a single Fitzpatrick function of a maximal
monotone operator has a conjugate above the duality product, then all
Fitzpatrick function of the operator have a conjugate above the duality
product. As a consequence, the family of maximal monotone operators with this
property is just the class NI, previously defined and studied by Simons.
  We will also prove that an auxiliary condition used by the authors to prove
the restricted Brondsted-Rockafellar property is equivalent to the assumption
of the conjugate of the Fitzpatrick function to majorize the duality product.


title:
Maximum likelihood estimation of cloud height from multi-angle satellite
  imagery

abstract:
  We develop a new estimation technique for recovering depth-of-field from
multiple stereo images. Depth-of-field is estimated by determining the shift in
image location resulting from different camera viewpoints. When this shift is
not divisible by pixel width, the multiple stereo images can be combined to
form a super-resolution image. By modeling this super-resolution image as a
realization of a random field, one can view the recovery of depth as a
likelihood estimation problem. We apply these modeling techniques to the
recovery of cloud height from multiple viewing angles provided by the MISR
instrument on the Terra Satellite. Our efforts are focused on a two layer cloud
ensemble where both layers are relatively planar, the bottom layer is optically
thick and textured, and the top layer is optically thin. Our results
demonstrate that with relative ease, we get comparable estimates to the M2
stereo matcher which is the same algorithm used in the current MISR standard
product (details can be found in [IEEE Transactions on Geoscience and Remote
Sensing 40 (2002) 1547--1559]). Moreover, our techniques provide the
possibility of modeling all of the MISR data in a unified way for cloud height
estimation. Research is underway to extend this framework for fast, quality
global estimates of cloud height.


title: Precision Measurement of the Mass of the h_c(1P1) State of Charmonium

abstract:
  A precision measurement of the mass of the h_c(1P1) state of charmonium has
been made using a sample of 24.5 million psi(2S) events produced in e+e-
annihilation at CESR. The reaction used was psi(2S) -> pi0 h_c, pi0 -> gamma
gamma, h_c -> gamma eta_c, and the reaction products were detected in the
CLEO-c detector.
  Data have been analyzed both for the inclusive reaction and for the exclusive
reactions in which eta_c decays are reconstructed in fifteen hadronic decay
channels. Consistent results are obtained in the two analyses. The averaged
results of the present measurements are M(h_c)=3525.28+-0.19 (stat)+-0.12(syst)
MeV, and B(psi(2S) -> pi0 h_c)xB(h_c -> gamma eta_c)= (4.19+-0.32+-0.45)x10^-4.
Using the 3PJ centroid mass, Delta M_hf(1P)=<M(chi_cJ)> - M(h_c) =
+0.02+-0.19+-0.13 MeV.


title: Logic for electromagnetic field patterns

abstract:
  It is assumed that the digital-like spatio-time brain activity might be
caused by non-topological transformations of patterns in the cortex which is a
linear, analog and active system. Such an effect can be modeled by
topologically modulated spatio-time electromagnetic signals which theory is
proposed in this paper. The logical operations are performed by passive
components, and a theory of them is considered. Two gates of this sort are
simulated. A short review on semiconductor hardware for this type of spatial
digital processing and computing is given.


title: Small amplitude effects in $B^0\to D^+D^-$ and related decays

abstract:
  Intrigued by a recent Belle result for a large direct CP asymmetry in $B^0\to
D^+D^-$, we study the effects of a $\bar b\to \bar uu\bar d$ quark transition
by combining the asymmetry information with rates and asymmetries in
isospin-related decays. Arguing for a hierarchy among several contributions to
these decays, including an exchange amplitude which we estimate, we present
tests for factorization of the leading terms, and obtain an upper bound on the
ratio of $\bar b\to \bar uu\bar d$ and $\bar b\to \bar cc\bar d$ amplitudes. We
prove an approximate $\Delta I=1/2$ amplitude relation for $B\to D\bar D$, and
an approximate equality between CP asymmetries in $B^0\to D^+D^-$ and $B^+\to
D^+\bar D^0$. Violations of these relations by Belle measurements, at
$1.8\sigma$ and $3.6\sigma$ respectively, if confirmed, would indicate a
possible New Physics contribution in $\bar b\to \bar uu\bar d$. Applying flavor
SU(3), we extend this study to a total of ten processes including $\Delta S=0$
decays involving final $D_s$ and initial $B_s$ mesons, and $\Delta S=1$ decays
of $B$ and $B_s$ mesons into pairs of charmed pseudoscalar mesons. The decays
$B_s\to D\bar D$ provide useful information about a small exchange amplitude,
responsible for a decay rate difference between $B^+\to D^+\bar D^0$ and
$B^0\to D^+D^-$. A method for determining the weak phase $\gamma$, based on CP
asymmetries in $B^0(t)\to D^+D^-$ and the decay rate for $B_s\to D^+_sD^-_s$ or
$B^{+(0)}\to D^+_s\bar D^0 (D^-)$, is shown to involve high sensitivity to
SU(3) breaking.


title: Excitons in the wurtzite AlGaN/GaN quantum-well heterostructures

abstract:
  We have theoretically studied exciton states and photoluminescence spectra of
strained wurtzite AlGaN/GaN quantum-well heterostructures. The electron and
hole energy spectra are obtained by numerically solving the Schr\"odinger
equation, both for a single-band Hamiltonian and for a non-symmetrical 6-band
Hamiltonian. The deformation potential and spin-orbit interaction are taken
into account. For increasing built-in field, generated by the piezoelectric
polarization and by the spontaneous polarization, the energy of size
quantization rises and the number of size quantized electron and hole levels in
a quantum well decreases. The exciton energy spectrum is obtained using
electron and hole wave functions and two-dimensional Coulomb wave functions as
a basis. We have calculated the exciton oscillator strengths and identified the
exciton states active in optical absorption. For different values of the Al
content x, a quantitative interpretation, in a good agreement with experiment,
is provided for (i) the red shift of the zero-phonon photoluminescence peaks
for increasing the quantum-well width, (ii) the relative intensities of the
zero-phonon and one-phonon photoluminescence peaks, found within the
non-adiabatic approach, and (iii) the values of the photoluminescence decay
time as a function of the quantum-well width.


title:
Zooming in on a sleeping giant: milliarcsecond HSA imaging of the black
  hole binary V404 Cyg in quiescence

abstract:
  Observations of the black hole X-ray binary V404 Cyg with the very long
baseline interferometer HSA (the High Sensitivity Array) have detected the
source at a frequency of 8.4 GHz, providing a source position accurate to 0.3
mas relative to the calibrator source. The observations put an upper limit of
1.3 mas on the source size (5.2 AU at 4 kpc) and a lower limit of 7 x 10^6 K on
its brightness temperature during the normal quiescent state, implying that the
radio emission must be non-thermal, most probably synchrotron radiation,
possibly from a jet. The radio lightcurves show a short flare, with a rise time
of about 30 min, confirming that the source remains active in the quiescent
state.


title: Maximal monotone operators with a unique extension to the bidual

abstract:
  We present a new sufficient condition under which a maximal monotone operator
$T:X\tos X^*$ admits a unique maximal monotone extension to the bidual
$\widetilde T:X^{**} \rightrightarrows X^*$. For non-linear operators this
condition is equivalent to uniqueness of the extension.
  The class of maximal monotone operators which satisfy this new condition
includes class of Gossez type D maximal monotone operators, previously defined
and studied by J.-P. Gossez, and all maximal monotone operators of this new
class satisfies a restricted version of Brondsted-Rockafellar condition.
  The central tool in our approach is the $\mathcal{S}$-function defined and
studied by Burachik and Svaiter in 2000 \cite{BuSvSet02}(submission date, July
2000). For a generic operator, this function is the supremum of all convex
lower semicontinuous functions which are majorized by the duality product in
the graph of the operator.
  We also prove in this work that if the graph of a maximal monotone operator
is convex, then this graph is an affine linear subspace.


title:
Connecting Gas Dynamics and Star Formation Histories in Nearby Galaxies:
  The VLA-ANGST Survey

abstract:
  In recent years, HST revolutionized the field of star formation in nearby
galaxies. Due to its high angular resolution it has now become possible to
construct star formation histories of individual stellar populations on scales
of a few arcseconds spanning a range of up to
  ~600 Myr. This method will be applied to the ANGST galaxies, a large HST
volume limited survey to map galaxies up to distances of 3.5-4.0 Mpc (excluding
the Local Group). The ANGST sample is currently followed--up by high, ~6''
resolution VLA observations of neutral, atomic hydrogen (HI) in the context of
VLA-ANGST, an approved Large VLA Project. The VLA resolution is well matched to
that of the spatially resolved star formation history maps. The combination of
ANGST and VLA-ANGST data will provide a new, promising approach to study
essential fields of galaxy evolution such as the triggering of star formation,
the feedback of massive stars into the interstellar medium, and the structure
and dynamics of the interstellar medium.


title: Community Detection using a Measure of Global Influence

abstract:
  The growing popularity of online social networks has provided researchers
with access to large amount of social network data. This, coupled with the ever
increasing computation speed, storage capacity and data mining capabilities,
led to the renewal of interest in automatic community detection methods.
Surprisingly, there is no universally accepted definition of the community. One
frequently used definition states that ``communities, that have more and/or
better-connected `internal edges' connecting members of the set than `cut
edges' connecting the set to the rest of the world''[Leskovec et al. 20008].
This definition inspired the modularity-maximization class of community
detection algorithms, which look for regions of the network that have higher
than expected density of edges within them. We introduce an alternative
definition which states that a community is composed of individuals who have
more influence on others within the community than on those outside of it. We
present a mathematical formulation of influence, define an influence-based
modularity metric, and show how to use it to partition the network into
communities. We evaluated our approach on the standard data sets used in
literature, and found that it often outperforms the edge-based modularity
algorithm.


title:
Scattered-Light Echoes from the Historical Galactic Supernovae
  Cassiopeia A and Tycho (SN 1572)

abstract:
  We report the discovery of an extensive system of scattered light echo
arclets associated with the recent supernovae in the local neighbourhood of the
Milky Way: Tycho (SN 1572) and Cassiopeia A. Existing work suggests that the
Tycho SN was a thermonuclear explosion while the Cas A supernova was a core
collapse explosion. Precise classifications according to modern nomenclature
require spectra of the outburst light. In the case of ancient SNe, this can
only be done with spectroscopy of their light echo, where the discovery of the
light echoes from the outburst light is the first step. Adjacent light echo
positions suggest that Cas A and Tycho may share common scattering dust
structures. If so, it is possible to measure precise distances between
historical Galactic supernovae. On-going surveys that alert on the development
of bright scattered-light echo features have the potential to reveal detailed
spectroscopic information for many recent Galactic supernovae, both directly
visible and obscured by dust in the Galactic plane.


title: Exploring the Outer Solar System with the ESSENCE Supernova Survey

abstract:
  We report the discovery and orbit determination of 14 trans-Neptunian objects
(TNOs) from the ESSENCE Supernova Survey difference imaging dataset. Two
additional objects discovered in a similar search of the SDSS-II Supernova
Survey database were recovered in this effort. ESSENCE repeatedly observed
fields far from the Solar System ecliptic (-21 deg < beta < -5 deg), reaching
limiting magnitudes per observation of I~23.1 and R~23.7. We examine several of
the newly detected objects in detail, including 2003 UC_414 which orbits
entirely between Uranus and Neptune and lies very close to a dynamical region
that would make it stable for the lifetime of the Solar System. 2003 SS_422 and
2007 TA_418 have high eccentricities and large perihelia, making them candidate
members of an outer class of trans-Neptunian objects. We also report a new
member of the ''extended'' or ''detached'' scattered disk, 2004 VN_112, and
verify the stability of its orbit using numerical simulations. This object
would have been visible to ESSENCE for only ~2% of its orbit, suggesting a vast
number of similar objects across the sky. We emphasize that off-ecliptic
surveys are optimal for uncovering the diversity of such objects, which in turn
will constrain the history of gravitational influences that shaped our early
Solar System.


title:
On the surjectivity properties of perturbations of maximal monotone
  operators in non-reflexive Banach spaces

abstract:
  We are concerned with surjectivity of perturbations of maximal monotone
operators in non-reflexive Banach spaces. While in a reflexive setting, a
classical surjectivity result due to Rockafellar gives a necessary and
sufficient condition to maximal monotonicity, in a non-reflexive space we
characterize maximality using a ``enlarged'' version of the duality mapping,
introduced previously by Gossez.


title:
Coherence of burst oscillations and accretion-powered pulsations in the
  accreting millisecond pulsar XTE J1814-338

abstract:
  X-ray timing of the accretion-powered pulsations during the 2003 outburst of
the accreting millisecond pulsar XTE J1814-338 has revealed variation in the
pulse time of arrival residuals. These can be interpreted in several ways,
including spin-down and wandering of the fuel impact point around the magnetic
pole. In this Letter we show that the burst oscillations of this source are
coherent with the persistent pulsations, to the level where they track all of
the observed fluctuations. Only one burst, which occurs at the lowest accretion
rates, shows a significant phase offset. We discuss what might lead to such
rigid phase-locking between the modulations in the accretion and thermonuclear
burst emission, and consider the implications for spin variation and the burst
oscillation mechanism. Wandering of the fuel impact hot spot around a fixed
magnetic pole seems the most likely cause for the accretion-powered pulse phase
variations. This means that the burst asymmetry is coupled to the hot spot, not
the magnetic pole. If premature ignition at this point (due to higher local
temperatures) triggers a burning front that stalls before spreading over the
entire surface, the resulting localized nuclear hot spot may explain the
unusual burst and burst oscillation properties of this source.


title: Bicategory of entwinings

abstract:
  We define a bicategory in which the 0-cells are the entwinings over variable
rings. The 1-cells are triples of a bimodule and two maps of bimodules which
satisfy an additional hexagon, two pentagons and two (co)unit triangles; and
the 2-cells are the maps of bimodules satisfying two simple compatibilities.
The operation of getting the "composed coring" from a given entwining, is
promoted here to a canonical morphism of bicategories from a bicategory of
entwinings to the Street's bicategory of corings.


title: Extended Jahn-Teller effects in fermion-boson systems revisited

abstract:
  Following earlier suggestions, we now redefine our proposal for extending the
Jahn-Teller coupling beyond the framework of the electron-phonon interactions
so as to cover fermion-boson interactions on a broader energy scale. Our basic
unit is an extended "vibronic polaron" (VP), a fermion, itinerant or localized,
along with the associated distortion of its boson cloud. A fingerprint of the
itinerant unit is the helical form of VP propagation, else the occurrence of an
orbital angular momentum for the free carrier. Examples for extended VP's are
provided by LG-mode laser beams and, possibly, neutrino-meson coupled units.
Our VP theory relates to supersymmetry where it accounts for symmetry breaking,
both external and internal ones.


title: Gluon Shadowing in DIS off Nuclei

abstract:
  Within a light-cone quantum-chromodynamics dipole formalism based on the
Green function technique, we study nuclear shadowing in deep-inelastic
scattering at small Bjorken xB < 0.01. Such a formalism incorporates naturally
color transparency and coherence length effects. Calculations of the nuclear
shadowing for the \bar{q}q Fock component of the photon are based on an exact
numerical solution of the evolution equation for the Green function, using a
realistic form of the dipole cross section and nuclear density function. Such
an exact numerical solution is unavoidable for xB > 0.0001, when a variation of
the transverse size of the \bar{q}q Fock component must be taken into account.
The eikonal approximation, used so far in most other models, can be applied
only at high energies, when xB < 0.0001 and the transverse size of the \bar{q}q
Fock component is "frozen" during propagation through the nuclear matter. At xB
< 0.01 we find quite a large contribution of gluon suppression to nuclear
shadowing, as a shadowing correction for the higher Fock states containing
gluons. Numerical results for nuclear shadowing are compared with the available
data from the E665 and NMC collaborations. Nuclear shadowing is also predicted
at very small xB corresponding to LHC kinematical range. Finally the model
predictions are compared and discussed with the results obtained from other
models.


title: A covariant entropy bound conjecture on the dynamical horizon

abstract:
  As a compelling pattern for the holographic principle, our covariant entropy
bound conjecture is proposed for more general dynamical horizons. Then we apply
our conjecture to $\Lambda$CDM cosmological models, where we find it imposes a
novel upper bound $10^{-90}$ on the cosmological constant for our own universe
by taking into account the dominant entropy contribution from super-massive
black holes, which thus provides an alternative macroscopic perspective to
understand the longstanding cosmological constant problem. As an intriguing
implication of this conjecture, we also discuss the possible profound relation
between the present cosmological constant, the origin of mass, and the
anthropic principle.


title: Generalized Scaling Function at Strong Coupling

abstract:
  We considered folded spinning string in AdS_5 x S^5 background dual to the
Tr(D^S Phi^J) operators of N=4 SYM theory. In the limit S,J-> \infty and l=pi
J/\sqrt\lambda\log S fixed we compute the string energy with the 2-loop
accuracy in the worldsheet coupling \sqrt\lambda from the asymptotical Bethe
ansatz. In the limit l-> 0 the result is finite due to the massive cancelations
with terms coming from the conjectured dressing phase. We also managed to
compute all leading logarithm terms l^{2m}\log^n l/\lambda^n/2 to an arbitrary
order in perturbation theory. In particular for m=1 we reproduced results of
Alday and Maldacena computed from a sigma model. The method developed in this
paper could be used for a systematic expansion in 1/\sqrt\lambda and also at
weak coupling.


title: The BCS-like gap in superconductor SmFeAsO_0.85F_0.15

abstract:
  Since the discovery of superconductivity in the cuprates two decades ago, it
has been firmly established that the CuO_2 plane is consequential for high T_C
superconductivity and a host of other very unusual properties. A new family of
superconductors with the general composition of LaFeAsO_(1-x)F_x has recently
been discovered but with the conspicuous lacking of the CuO_2 planes, thus
raising the tantalizing questions of the different pairing mechanisms in these
oxypnictide superconductors. Intimately related to pairing in a superconductor
are the superconducting gap, its value, structure, and temperature dependence.
Here we report the observation of a single gap in the superconductor
SmFeAsO_0.85F_0.15 with T_C = 42 K as measured by Andreev spectroscopy. The gap
value of 2Delta = 13.34+/-0.3 meV gives 2Delta/k_BT_C = 3.68, close to the BCS
prediction of 3.53. The gap decreases with temperature and vanishes at T_C in a
manner consistent with the Bardeen-Cooper-Schrieffer (BCS) prediction but
dramatically different from that of the pseudogap behavior in the cuprate
superconductors. Our results clearly indicate a nodeless gap order parameter,
which is nearly isotropic in size across different sections of the Fermi
surface, and are not compatible with models involving antiferromagnetic
fluctuations, strong correlations, t-J model, and the like, originally designed
for cuprates.


title: Structural transitions of finite spherical Yukawa crystals

abstract:
  Small three-dimensional strongly coupled clusters of charged particles in a
spherical confinement potential arrange themselves in nested concentric shells.
If the particles are immersed into a background plasma the interaction is
screened. The cluster shell configuration is known to be sensitive to the
screening strength. With increased screening an increased population of the
inner shell(s) is observed. Here, we present a detailed analysis of the ground
state shell configurations and configuration changes in a wide range of
screening parameters for clusters with particle numbers $N$ in the range of 11
to 60. We report three types of anomalous behaviors which are observed upon
increase of screening, at fixed $N$ or for an increase of $N$ at fixed
screening. The results are obtained by means of extensive first principle
molecular dynamics simulations.


title:
On the first passage time for Brownian motion subordinated by a Levy
  process

abstract:
  This paper considers the class of L\'evy processes that can be written as a
Brownian motion time changed by an independent L\'evy subordinator. Examples in
this class include the variance gamma model, the normal inverse Gaussian model,
and other processes popular in financial modeling. The question addressed is
the precise relation between the standard first passage time and an alternative
notion, which we call first passage of the second kind, as suggested by Hurd
(2007) and others. We are able to prove that standard first passage time is the
almost sure limit of iterations of first passage of the second kind. Many
different problems arising in financial mathematics are posed as first passage
problems, and motivated by this fact, we are lead to consider the implications
of the approximation scheme for fast numerical methods for computing first
passage. We find that the generic form of the iteration can be competitive with
other numerical techniques. In the particular case of the VG model, the scheme
can be further refined to give very fast algorithms.


title: Properties of Nonequilibrium Steady States: a Path Integral Approach

abstract:
  A number of properties of systems in a nonequilibrium steady state (NESS) are
investigated by a generalization of the Onsager-Machlup (OM) path integral
approach for systems in an equilibrium state (ES). A thermodynamics formally
identical to that in an ES can be formulated, but with definitions of work and
heat as those needed to maintain the NESS. In this approach, the heat plays a
crucial role and is directly related to the different behavior of a system?s
forward and backward paths in time in an appropriate function space. However,
an ambiguity in the choice of the time- backward path corresponding to a given
time-forward path prevents a unique general formal theory for systems in a
NESS. Unique unambiguous physically acceptable physical results for a system in
a NESS appear to be obtainable only after specifying the physical
nonequilibrium parameters, which define a system in a NESS as part of a larger
system. NESS systems are therefore fundamentally different from those in an ES.
Furthermore, an example is given for a particular system that the fluctuations
of a system in a NESS behave in many respects very differently from those in a
system in an ES.


title: Uplink Macro Diversity of Limited Backhaul Cellular Network

abstract:
  In this work new achievable rates are derived, for the uplink channel of a
cellular network with joint multicell processing, where unlike previous
results, the ideal backhaul network has finite capacity per-cell. Namely, the
cell sites are linked to the central joint processor via lossless links with
finite capacity. The cellular network is abstracted by symmetric models, which
render analytical treatment plausible. For this idealistic model family,
achievable rates are presented for cell-sites that use compress-and-forward
schemes combined with local decoding, for both Gaussian and fading channels.
The rates are given in closed form for the classical Wyner model and the
soft-handover model. These rates are then demonstrated to be rather close to
the optimal unlimited backhaul joint processing rates, already for modest
backhaul capacities, supporting the potential gain offered by the joint
multicell processing approach. Particular attention is also given to the
low-SNR characterization of these rates through which the effect of the limited
backhaul network is explicitly revealed. In addition, the rate at which the
backhaul capacity should scale in order to maintain the original high-SNR
characterization of an unlimited backhaul capacity system is found.


title:
Wave Propagation and Diffusive Transition of Oscillations in Pair
  Plasmas with Dust Impurities

abstract:
  In view of applications to electron-positron pair-plasmas and fullerene
pair-ion-plasmas containing charged dust impurities a thorough discussion is
given of three-component Plasmas. Space-time responses of multi-component
linearized Vlasov plasmas on the basis of multiple integral equations are
invoked. An initial-value problem for Vlasov-Poisson -Ampere equations is
reduced to the one multiple integral equation and the solution is expressed in
terms of forcing function and its space-time convolution with the resolvent
kernel. The forcing function is responsible for the initial disturbance and the
resolvent is responsible for the equilibrium velocity distributions of plasma
species. By use of resolvent equations, time-reversibility, space-reflexivity
and the other symmetries are revealed. The symmetries carry on physical
properties of Vlasov pair plasmas, e.g., conservation laws. Properly choosing
equilibrium distributions for dusty pair plasmas, we can reduce the resolvent
equation to: (i) the undamped dispersive wave equations, (ii) wave-diffusive
transport equation (iii) and diffusive transport equations of oscillations. In
the last case we have to do with anomalous diffusion employing fractional
derivatives in time and space. Fractional diffusion equations account for
typical anomalous features, which are observed in many systems, e.g. in the
case of dispersive transport in amorphous semiconductors, liquid crystals,
polymers, proteins and biosystems.


title:
Crowded-Field Astrometry with SIM PlanetQuest. II. An Improved
  Instrument Model

abstract:
  In a previous paper we described a method of estimating the
single-measurement bias to be expected in astrometric observations of targets
in crowded fields with the future Space Interferometry Mission (SIM). That
study was based on a simplified model of the instrument and the measurement
process involving a single-pixel focal plane detector, an idealized
spectrometer, and continuous sampling of the fringes during the delay scanning.
In this paper we elaborate on this ``instrument model'' to include the
following additional complications: spectral dispersion of the light with a
thin prism, which turns the instrument camera into an objective prism
spectrograph; a multiple-pixel detector in the camera focal plane; and, binning
of the fringe signal during scanning of the delay. The results obtained with
this improved model differ in small but systematic ways from those obtained
with the earlier simplified model. We conclude that it is the pixellation of
the dispersed fringes on the focal plane detector which is responsible for the
differences. The improved instrument model described here suggests additional
ways of reducing certain kinds of confusion, and provides a better basis for
the evaluation of instrumental effects in the future.


title:
Symmetry-breaking Fermi surface deformations from central interactions
  in two dimensions

abstract:
  We present a mean field theory of the Pomeranchuk instability in two
dimensions, starting from a generic central interaction potential described in
terms of a few microscopic parameters. For a significant range of parameters,
the instability is found to be pre-empted by a first-order quantum phase
transition. We provide the ground state phase diagram in terms of our generic
parameters.


title:
Non-Linear Cepheid Period-Luminosity Relation and the Interaction of
  Stellar Photosphere with Hydrogen Ionization Front

abstract:
  The Cepheid period-luminosity (P-L) relation is regarded as a linear relation
(in log[P]) for a wide period range from ~2 to ~100 days. However, several
recent controversial works have suggested that the P-L relation derived from
the Large Magellanic Cloud (LMC) Cepheids exhibits a non-linear feature with a
break period around 10 days. Here we review the evidence for linear/non-linear
P-L relations from optical to near infrared bands. We offer a possible
theoretical explanation to account for the nonlinear P-L relation from the idea
of stellar photosphere - hydrogen ionization front interaction.


title:
X-ray irradiated protoplanetary disk atmospheres I: Predicted emission
  line spectrum and photoevaporation

abstract:
  We present MOCASSIN 2D photoionisation and dust radiative transfer models of
a prototypical T Tauri disk irradiated by X-rays from the young pre-main
sequence star. The calculations demonstrate a layer of hot gas reaching
temperatures of ~10^6 K at small radii and ~10^4 K at a distance of 1 AU. The
gas temperatures decrease sharply with depth, but appear to be completely
decoupled from dust temperatures down to a column depth of ~5*10^21 cm^-2.
  We predict that several fine-structure and forbidden lines of heavy elements,
as well as recombination lines of hydrogen and helium, should be observable
with current and future instrumentation, although optical lines may be
smothered by the stellar spectrum. Predicted line luminosities are given for
the the brightest collisionally excited lines (down to ~10^-8L_sun, and for
recombination transitions from several levels of HI and HeI.
  The mass loss rate due to X-ray photoevaporation estimated from our models is
of the order of 10^-8 M_sun yr^-1, implying a dispersal timescale of a few Myr
for a disk of mass 0.027 M_sun, which is the mass of the disk structure model
we employed. We discuss the limitations of our model and highlight the need for
further calculations that should include the simultaneous solution of the 2D
radiative transfer problem and the 1D hydrostatic equilibrium in the polar
direction.


title: High precision microlensing maps of the Galactic bulge

abstract:
  We present detailed maps of the microlensing optical depth and event density
over an area of 195 sq. deg towards the Galactic bulge. The maps are computed
from synthetic stellar catalogues generated from the Besancon Galaxy Model,
which comprises four stellar populations and a three-dimensional extinction map
calibrated against the Two-Micron All-Sky Survey. The optical depth maps have a
resolution of 15 arcminutes, corresponding to the angular resolution of the
extinction map. We compute optical depth and event density maps for all
resolved sources above I=19, for unresolved (difference image) sources
magnified above this limit, and for bright standard candle sources in the
bulge. We show that the resulting optical depth contours are dominated by
extinction effects, exhibiting fine structure in stark contrast to previous
theoretical optical depth maps. Optical depth comparisons between Galactic
models and optical microlensing survey measurements cannot safely ignore
extinction or assume it to be smooth. We show how the event distribution for
hypothetical J and K-band microlensing surveys, using existing ground-based
facilities such as VISTA, UKIRT or CFHT, would be much less affected by
extinction, especially in the K band. The near infrared provides a substantial
sensitivity increase over current I-band surveys and a more faithful tracer of
the underlying stellar distribution, something which upcoming variability
surveys such as VVV will be able to exploit. Synthetic population models offer
a promising way forward to fully exploit large microlensing datasets for
Galactic structure studies.


title:
Separating the scales of confinement and chiral-symmetry breaking in
  lattice QCD with fundamental quarks

abstract:
  Suggested holographic duals of QCD, based on AdS/CFT duality, predict that
one should be able to vary the scales of colour confinement and chiral-symmetry
breaking independently. Furthermore they suggest that such independent
variation of scales can be achieved by the inclusion of extra 4-fermion
interactions in QCD. We simulate lattice QCD with such extra 4-fermion terms at
finite temperatures and show that for strong enough 4-fermion couplings the
deconfinement transition occurs at a lower temperature than the chiral-symmetry
restoration transition. Moreover the separation of these transitions depends on
the size of the 4-fermion coupling, confirming the predictions from the
proposed holographic dual of QCD.


title:
Quasi-two-dimensional melting in porous media: effect of multi-layers
  and cross-over in scaling behavior

abstract:
  We report molecular simulation and experimental results for simple fluids
adsorbed in activated carbon fibers (ACF), where the adsorbed phase consists of
either one or two molecular layers. Our molecular simulations involve smooth
pore-walls for large system sizes and a systematic system size-scaling
analysis. We provide calculations of the Ginzburg parameter to monitor the
self-consistency of our finite size simulation results, based on which we
establish that for system sizes smaller than 60 molecular diameters,
fluctuations are too large to uphold the finite size simulation results. We
present scaling analysis and free energy results for a system size of 180
molecular diameters. Our scaling analysis reveals a two-stage melting in our
bilayer system consistent with KTHNY scaling for the order parameter
correlation functions. Based on the Lee-Kosterlitz scaling of the free energy
surface, we establish that the transitions are first order in the thermodynamic
limit. Similar results for a monolayer established that the transitions were
continuous. We provide scaling arguments to suggest that the change in the
order of the transitions in going from a monolayer to bilayer adsorbed system
results from the interactions of defects in the multilayers. We also report
experimental measurements of CCl4 and aniline (with two confined molecular
layers) adsorbed in ACF.


title: Hadronic Interactions from Lattice QCD

abstract:
  We present an overview of recent efforts to calculate the interactions among
hadrons using lattice QCD. After outlining the techniques that are used to
extract scattering parameters, we detail the latest calculations of meson-meson
scattering, baryon-baryon scattering and multi-meson systems obtained with
domain-wall valence quarks on the staggered MILC lattices by the NPLQCD
collaboration. Estimates of the computational resources required to achieve
precision results in the baryon sector are presented.


title: Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2

abstract:
  The ternary iron arsenide BaFe2As2 becomes superconducting by hole doping,
which was achieved by partial substitution of the barium site with potassium.
We have discovered bulk superconductivity up to Tc = 38 K in (Ba1-xKx)Fe2As2
with x = 0.4. The parent compound BaFe2As2 as well as KFe2As2 both crystallize
in the tetragonal ThCr2Si2-type structure, which consists of (FeAs)- iron
arsenide layers separated by barium or potassium ions. BaFe2As2 is a poor metal
and exhibits a SDW anomaly at 140 K. By substituting Ba2+ for K+ ions we have
introduced holes in the (FeAs)- layers, which suppress the SDW anomaly and
induce superconductivity. This scenario is very similar to the recently
discovered arsenide-oxide superconductors. The Tc of 38 K in (Ba1-xKx)Fe2As2 is
the highest observed critical temperature in hole doped iron arsenide
superconductors so far. Therefore, we were able to expand this class of
superconductors by oxygen-free compounds with the ThCr2Si2-type structure. Our
results suggest, that superconductivity in these systems essentially evolves
from the (FeAs)- layers and may occur in other related compounds.


title: Regularity and Segre-Veronese embeddings

abstract:
  This paper studies the regularity of certain coherent sheaves that arise
naturally from Segre-Veronese embeddings of a product of projective spaces. We
give an explicit formula for the regularity of these sheaves and show that
their regularity is subadditive. We then apply our results to study the Tate
resolutions of these sheaves.


title: Quasi-periodic solutions of nonlinear random Schr\"odinger equations

abstract:
  We construct quasi-periodic solutions to the lattice nonlinear random
Schroedinger equation on a set of potentials of positive measure via using a
Lyapunov-Schmidt decomposition and a multiscale Newton scheme.


title: Large Bi-2212 single crystal growth by the floating-zone technique

abstract:
  Effects of the growth velocity on the crystal growth behavior of
Bi_2Sr_2Ca_1Cu_2O_x (Bi-2212) have been studied by floating zone technique. The
results show that a necessary condition for obtaining large single crystals
along the c-axis is that the solid-liquid interface of a growing rod maintains
a stable planar growth front. The planar liquid-solid growth interface tends to
break down into a cellular interface, while the growth velocity is higher than
0.25 mm/h. Single crystals of up to 50x7.2x7 mm3 along the a-, b- and caxes
have been cut in a 7.2 mm diameter rod with optimum growth conditions. Tconset
is 91 K measured by magnetic properties measurement system (MPMS) for as-grown
crystals. Optical polarization microscope and neutron diffraction show that the
quality of the single crystals is good.


title: The perverse filtration and the Lefschetz Hyperplane Theorem

abstract:
  We describe the perverse filtration in cohomology using the Lefschetz
Hyperplane Theorem.


title: Baryons: What, When and Where?

abstract:
  We review the current state of empirical knowledge of the total budget of
baryonic matter in the Universe as observed since the epoch of reionization.
Our summary examines on three milestone redshifts since the reionization of H
in the IGM, z = 3, 1, and 0, with emphasis on the endpoints. We review the
observational techniques used to discover and characterize the phases of
baryons. In the spirit of the meeting, the level is aimed at a diverse and
non-expert audience and additional attention is given to describe how space
missions expected to launch within the next decade will impact this scientific
field.


title: Thermal Percolation for Interacting Monomers Adsorbed on Square Lattices

abstract:
  In this paper the percolation of monomers on a square lattice is studied as
the particles interact with either repulsive or attractive energies. By means
of a finite-size scaling analysis, the critical exponents and the scaling
collapsing of the fraction of percolating lattice are found. A phase diagram
separating a percolating from a non-percolating region is determined. The main
features of the phase diagram are discussed in terms of simple considerations
related to the interactions present in the problem. The influence of the phase
transitions occurring in the system is reflected by the phase diagram. In
addition, a scaling treatment maintaining constant the surface coverage and
varying the temperature of the system is performed. In all the considered
cases, the universality class of the model is found to be the same as for the
random percolation model.


title:
Two-particle Azimuthal Correlations of High-pT Charged Hadrons at the
  CERN SPS

abstract:
  Two-particle azimuthal correlations of high-pT hadrons can serve as a probe
of interactions of partons with the dense medium produced in high-energy
heavy-ion collisions. First NA49 results on such correlations are presented for
central and mid-central Pb+Pb collisions at 158A GeV beam energy, for different
centrality bins and charge combinations of trigger and associate particles.
These results feature a flattened away-side peak in the most central
collisions, which is consistent with expectations of the medium-interaction
scenario. A comparison with CERES Pb+Au results at the same energy, as well as
with PHENIX Au+Au results at the top RHIC energy, is provided.


title: Prototype Performance of Novel Muon Telescope Detector at STAR

abstract:
  Research on a large-area, cost-effective Muon Telescope Detector has been
carried out for RHIC and for next generation detectors at future QCD Lab. We
utilize state-of-the-art multi-gap resistive plate chambers with large modules
and long readout strips in detector design \cite{MTDLDRD}. The results from
cosmic ray and beam test will be presented to address intrinsic timing and
spatial resolution for a Long-MRPC. The prototype performance of a novel muon
telescope detector at STAR will be reported, including muon identification
capability, timing and spatial resolution.


title: The Newtonian Potential in Gravitational Cohomology

abstract:
  We examine the Newtonian potential in gravitational cohomology. This is given
by a symmetric, two-index tensor field, which satisfies the wave equation in
empty space. Furthermore, the associated gravitational field strength, obtained
by applying the coboundary operator to the potential, is constructed for the
case of a stationary point mass and shown to give the classical result.


title: Density of States and Critical Behavior of the Coulomb Glass

abstract:
  We present zero-temperature simulations for the single-particle density of
states of the Coulomb glass. Our results in three dimensions are consistent
with the Efros and Shklovskii prediction for the density of states.
Finite-temperature Monte Carlo simulations show no sign of a thermodynamic
glass transition down to low temperatures, in disagreement with mean-field
theory. Furthermore, the random-displacement formulation of the model undergoes
a transition into a distorted Wigner crystal for a surprisingly broad range of
the disorder strength.


title: Band structure of ZnO from resonant x-ray emission spectroscopy

abstract:
  Soft x-ray emission and absorption spectroscopy of the O K-edge are employed
to investigate the electronic structure of wurtzite ZnO(0001). A quasiparticle
band structure calculated within the GW approximation agrees well with the
data, most notably with the energetic location of the Zn3d - O2p hybridized
state and the anisotropy of the absorption spectra. Dispersion in the band
structure is mapped using the coherent k-selective part of the resonant x-ray
emission spectra. We show that a more extensive mapping of the bands is
possible in the case of crystalline anisotropy such as that found in ZnO.


title: Macroscopic Strings and "Quirks" at Colliders

abstract:
  We consider extensions of the standard model containing additional heavy
particles ("quirks") charged under a new unbroken non-abelian gauge group as
well as the standard model. We assume that the quirk mass m is in the
phenomenologically interesting range 100 GeV--TeV, and that the new gauge group
gets strong at a scale Lambda < m. In this case breaking of strings is
exponentially suppressed, and quirk production results in strings that are long
compared to 1/Lambda. The existence of these long stable strings leads to
highly exotic events at colliders. For 100 eV < Lambda < keV the strings are
macroscopic, giving rise to events with two separated quirk tracks with
measurable curvature toward each other due to the string interaction. For keV <
Lambda < MeV the typical strings are mesoscopic: too small to resolve in the
detector, but large compared to atomic scales. In this case, the bound state
appears as a single particle, but its mass is the invariant mass of a quirk
pair, which has an event-by-event distribution. For MeV < Lambda < m the
strings are microscopic, and the quirks annihilate promptly within the
detector. For colored quirks, this can lead to hadronic fireball events with
10^3 hadrons with energy of order GeV emitted in conjunction with hard decay
products from the final annihilation.


title: Quantum Hall Effect in AdS/CFT

abstract:
  Drawing on the connection with superconductivity, we give a simple AdS
realization of the quantum Hall effect. The theory includes a statistical gauge
field with a Chern-Simons term, in analogy with effective field theory models
of the QHE.


title: Direct photons ~basis for characterizing heavy ion collisions~

abstract:
  After years of experimental and theoretical efforts, direct photons become a
strong and reliable tool to establish the basic characteristics of a hot and
dense matter produced in heavy ion collisions. The recent direct photon
measurements are reviewed and a future prospect is given.