title: Characterizing Long-Period Transiting Planets Observed by Kepler

abstract:
  Kepler will monitor a sufficient number of stars that it is likely to detect
single transits of planets with periods longer than the mission lifetime. We
show that by combining the exquisite Kepler photometry of such transits with
precise radial velocity observations taken over a reasonable timescale (~ 6
months) after the transits, and assuming circular orbits, it is possible to
estimate the periods of these transiting planets to better than 20%, for
planets with radii greater than that of Neptune, and the masses to within a
factor of 2, for planets with masses larger than or about equal to the mass of
Jupiter. Using a Fisher matrix analysis, we derive analytic estimates for the
uncertainties in the velocity of the planet and the acceleration of the star at
the time of transit, which we then use to derive the uncertainties for the
planet mass, radius, period, semimajor axis, and orbital inclination. Finally,
we explore the impact of orbital eccentricity on the estimates of these
quantities.


title:
The Role of Electrical and Thermal Contact Resistance for Joule
  Breakdown of Single-Wall Carbon Nanotubes

abstract:
  Several data sets of electrical breakdown in air of single-wall carbon
nanotubes (SWNTs) on insulating substrates are collected and analyzed. A
universal scaling of the Joule breakdown power with nanotube length is found,
which appears independent of the insulating substrates used or their thickness.
This suggests the thermal resistances at the interface between SWNT and
insulator, and between SWNT and electrodes, govern heat sinking from the
nanotube. Analytical models for the breakdown power scaling are presented,
providing an intuitive, physical understanding of the breakdown process. The
electrical and thermal resistance at the electrode contacts limit the breakdown
behavior for sub-micron SWNTs, the breakdown power scales linearly with length
for microns-long tubes, and a minimum breakdown power (~ 0.05 uW) is observed
for the intermediate (~ 0.5 um) length range.


title: Enrichment and Pre-Heating in Intragroup Gas from Galactic Outflows

abstract:
  We examine metal and entropy content in galaxy groups having T_X~0.5-2 keV in
cosmological hydrodynamic simulations. Our simulations include a
well-constrained prescription for galactic outflows following momentum-driven
wind scalings, and a sophisticated chemical evolution model. Our simulation
with no outflows reproduces observed iron abundances in X-ray emitting gas, but
the oxygen abundance is too low; including outflows yields iron and oxygen
abundances in good agreement with data. X-ray measures of [O/Fe] primarily
reflect metal distribution mechanisms into hot gas, not the ratio of Type Ia to
Type II supernovae within the group. Iron abundance increases by x2 from z=1-0
independent of group size, consistent with that seen in clusters, while [O/Fe]
drops by ~30%. Core entropy versus temperature is elevated over self-similar
predictions regardless of outflows due to radiative cooling removing
low-entropy gas, but outflows provide an additional entropy contribution below
1 keV. This results in a noticeable break in the L_X-T_X relation below 1 keV,
as observed. Importantly, outflows serve to reduce the stellar content of
groups to observed levels. Radial profiles from simulations are in broad
agreement with observations, but there remain non-trivial discrepancies that
may reflect an excess of late-time star formation in central group galaxies in
our simulations. Our model with outflows suggests a connection between physical
processes of galaxy formation and both pre-heating and enrichment in intragroup
gas, though more definitive conclusions must await a model that simultaneously
suppresses cooling flows as observed.


title: A Random Matrix Study of the QCD Sign Problem

abstract:
  We investigate the severity of the sign problem in a random matrix model for
QCD at finite temperature T and baryon chemical potential mu. We obtain
analytic expression for the average phase factor -- the measure of the severity
of the sign problem at arbitrary T and mu. We observe that the sign problem
becomes less severe as the temperature is increased. We also find the domain
where the sign problem is maximal -- the average phase factor is zero, which is
related to the pion condensation phase in the QCD with finite isospin chemical
potential. We find that, in the matrix model we studied, the critical point is
located inside the domain of the maximal sign problem, making the point
inaccessible to conventional reweighting techniques. We observe and describe
the scaling behavior of the size and shape of the pion condensation near the
chiral limit.


title:
Molecular hydrogen adsorbed on benzene: insights from a quantum Monte
  Carlo study

abstract:
  We present a quantum Monte Carlo study of the hydrogen-benzene system where
binding is very weak. We demonstrate that the binding is well described at both
variational Monte Carlo (VMC) and diffusion Monte Carlo (DMC) levels by a
Jastrow correlated single determinant geminal wave function with an optimized
compact basis set that includes diffuse orbitals. Agreement between VMC and
fixed-node DMC binding energies is found to be within 0.18 mHa, suggesting the
calculations are well-converged with respect to the basis. Essentially the same
binding is also found in independent DMC calculations using a different trial
wave function of a more conventional Slater-Jastrow form, supporting our
conclusion that the binding energy is accurate and includes all effects of
correlation. We compare with empirical models and previous calculations, and we
discuss the physical mechanisms of the interaction, the role of diffuse basis
functions, and the charge redistribution in the bond.


title: Bulk Compton motion in the luminous quasar 4C04.42?

abstract:
  We present the broadband analysis of the powerful quasar 4C04.42 (z=0.965)
observed by XMM and INTEGRAL. The 0.2--200 keV spectrum is well reproduced with
a hard power-law component ($\Gamma\sim$1.2), augmented by a soft component
below 2 keV (observer frame), which is described by a thermal blackbody with
temperature kT$\backsimeq$ 0.15 keV. Alternatively, a broken power-law with
E$_{break}$=2 keV and $\Delta\Gamma$=0.4 can equally well describe the data.
Using archival data we compile the not-simultaneous Spectral Energy
Distribution of the source from radio to gamma-ray frequencies. The SED shows
two main components: the low frequency one produced by Synchrotron radiation
from the electrons moving in the jet and the high energy one produced through
external Compton scattering of the electrons with the photon field of the Broad
Line Region. Within this scenario the excess emission in the soft-X ray band
can be interpreted as due to Bulk Compton radiation of cold electrons. However,
some other processes, briefly discussed in the text, can also reproduce the
observed bump.


title:
The Generation of Coronal Loop Waves below the Photosphere by p-Mode
  Forcing

abstract:
  Recent observations of coronal-loop waves by TRACE and within the corona as a
whole by CoMP clearly indicate that the dominant oscillation period is 5
minutes, thus implicating the solar p modes as a possible source. We
investigate the generation of tube waves within the solar convection zone by
the buffeting of p modes. The tube waves--in the form of longitudinal sausage
waves and transverse kink waves--are generated on the many magnetic fibrils
that lace the convection zone and pierce the solar photosphere. Once generated
by p-mode forcing, the tube waves freely propagate up and down the tubes, since
the tubes act like light fibers and form a waveguide for these magnetosonic
waves. Those waves that propagate upward pass through the photosphere and enter
the upper atmosphere where they can be measured as loop oscillations and other
forms of propagating coronal waves. We treat the magnetic fibrils as vertically
aligned, thin flux tubes and compute the energy flux of tube waves that can
generated and driven into the upper atmosphere. We find that a flux in excess
of 10^5 ergs/cm^2/s can be produced, easily supplying enough wave energy to
explain the observations. Furthermore, we compute the associated damping rate
of the driving p modes and find that the damping is significant compared to
observed line widths only for the lowest order p modes.


title: Hybrid Charmonium and the $\rho-\pi$ Puzzle

abstract:
  Using the method of QCD Sum Rules, we estimate the energy of the lowest
hybrid Charmonium state, and find it to be at the energy of the $\Psi'(2S)$
state, about 600 Mev above the $J/\Psi(1S)$ state. Since our solution is not
consistent with a pure hybrid at this energy, we conclude that the $\Psi'(2S)$
state is probably an admixed $c \bar{c}$ and hybrid $c \bar{c}g$ state. From
this conjecture we find a possible explanation of the famous $\rho-\pi$ puzzle.


title:
Second and third season QUaD CMB temperature and polarization power
  spectra

abstract:
  We report results from the second and third seasons of observation with the
QUaD experiment. Angular power spectra of the Cosmic Microwave Background are
derived for both temperature and polarization at both 100 GHz and 150 GHz, and
as cross frequency spectra. All spectra are subjected to an extensive set of
jackknife tests to probe for possible systematic contamination. For the
implemented data cuts and processing technique such contamination is
undetectable. We analyze the difference map formed between the 100 and 150 GHz
bands and find no evidence of foreground contamination in polarization. The
spectra are then combined to form a single set of results which are shown to be
consistent with the prevailing LCDM model. The sensitivity of the polarization
results is considerably better than that of any previous experiment -- for the
first time multiple acoustic peaks are detected in the E-mode power spectrum at
high significance.


title:
Commissioning of CMS and early standard model measurements with jets,
  missing transverse energy and photons at the LHC

abstract:
  We report on the status and history of the CMS commissioning, together with
selected results from cosmic-ray muon data. The second part focuses on
strategies for optimizing the reconstruction of jets, missing transverse energy
and photons for early standard model measurements at ATLAS and CMS with the
first collision data from the Large Hadron Collider at CERN.


title: Model Independent Searches In ep Collisions

abstract:
  The high energy program of the HERA collider ended in March 2007. In total
the H1 and ZEUS experiments collected an integrated luminosity of about 1
fb$^{-1}$. Recent results of model independent searches for new physics from
both experiments are presented. Specifically, studies of the events with an
isolated lepton and missing transverse momentum and multi-lepton topologies,
where H1 and ZEUS data are combined, and a general signature based search are
discussed.


title: On the physical basis of cosmic time

abstract:
  In this manuscript we initiate a systematic examination of the physical basis
for the time concept in cosmology. We discuss and defend the idea that the
physical basis of the time concept is necessarily related to physical processes
which could conceivably take place among the material constituents available in
the universe. It is common practice to link the concept of cosmic time with a
space-time metric set up to describe the universe at large scales, and then
define a cosmic time $t$ as what is measured by a comoving standard clock. We
want to examine, however, the physical basis for setting up a comoving
reference frame and, in particular, what could be meant by a standard clock.
For this purpose we introduce the concept of a `core' of a clock (which, for a
standard clock in cosmology, is a scale-setting physical process) and we ask if
such a core can--in principle--be found in the available physics contemplated
in the various `stages' of the early universe. We find that a first problem
arises above the quark-gluon phase transition (which roughly occurs when the
cosmological model is extrapolated back to $\sim 10^{-5}$ seconds) where there
might be no bound systems left, and the concept of a physical length scale to a
certain extent disappears. A more serious problem appears above the electroweak
phase transition believed to occur at $\sim 10^{-11}$ seconds. At this point
the property of mass (almost) disappears and it becomes difficult to identify a
physical basis for concepts like length scale, energy scale and temperature --
which are all intimately linked to the concept of time in modern cosmology.
This situation suggests that the concept of a time scale in `very early'
universe cosmology lacks a physical basis or, at least, that the time scale
will have to be based on speculative new physics.


title: Avalanches of Bose-Einstein Condensates in Leaking Optical Lattices

abstract:
  One of the most fascinating experimental achievements of the last decade was
the realization of Bose-Einstein Condensation (BEC) of ultra-cold atoms in
optical lattices (OL's). The extraordinary level of control over these
structures allows us to investigate complex solid state phenomena and the
emerging field of ``atomtronics'' promises a new generation of nanoscale
devices. It is therefore of fundamental and technological importance to
understand their dynamical properties. Here we study the outgoing atomic flux
of BECs loaded in an one-dimensional OL with leaking edges, using a mean field
description provided by the Discrete Non-Linear Schrodinger Equation (DNLSE).
We demonstrate that the atom population inside the OL decays in avalanches of
size $J$. For intermediate values of the interatomic interaction strength their
distribution ${\cal P}(J)$ follows a power law i.e. ${\cal
P}(J)\sim1/J^{\alpha}$ characterizing systems at phase transition. This scale
free behaviour of ${\cal P}(J)$ reflects the complexity and the hierarchical
structure of the underlying classical mixed phase space. Our results are
relevant in a variety of contexts (whenever DNLSE is adequate), most
prominently the light emmitance from coupled non-linear optics waveguides.


title: Aggregation of weakly dependent doubly stochastic processes

abstract:
  The aim of this paper is to extend the aggregation convergence results given
in (Dacunha-Castelle and Fermin 2005, Dacunha-Castelle and Fermin 2008) to
doubly stochastic linear and nonlinear processes with weakly dependent
innovations. First, we introduce a weak dependence notion for doubly stochastic
processes, based in the weak dependence definition given in (Doukhan and
Louhichi 1999), and we exhibe several models satisfying this notion, such as:
doubly stochastic Volterra processes and doubly stochastic Bernoulli scheme
with weakly dependent innovations. Afterwards we derive a central limit theorem
for the partial aggregation sequence considering weakly dependent doubly
stochastic processes. Finally, show a new SLLN for the covariance function of
the partial aggregation process in the case of doubly stochastic Volterra
processes with interactive innovations.
  Keywords: Aggregation, weak dependence, doubly stochastic processes, Volterra
processes, Bernoulli shift, TCL, SLLN.


title:
Universality in the Large N_c Dynamics of Flavour: Thermal Vs. Quantum
  Induced Phase Transitions

abstract:
  We show how two important types of phase transition in large N_c gauge theory
with fundamental flavours can be cast into the same classifying framework as
the meson-melting phase transition. These are quantum fluctuation induced
transitions in the presence of an external electric field, or a chemical
potential for R-charge. The classifying framework involves the study of the
local geometry of a special D-brane embedding, which seeds a self-similar
spiral structure in the space of embeddings. The properties of this spiral,
characterized by a pair of numbers, capture some key universal features of the
transition. Computing these numbers for these non-thermal cases, we find that
these transitions are in the same universality class as each other, but have
different universal features from the thermal case. We present a natural
generalization that yields new universality classes that may pertain to other
types of transition.


title: Nonlinear cosmological power spectra in Einstein's gravity

abstract:
  Is Newton's gravity sufficient to handle the weakly nonlinear evolution
stages of the cosmic large-scale structures? Here we resolve the issue by
analytically deriving the density and velocity power spectra to the second
order in the context of Einstein's gravity. The recently found pure general
relativistic corrections appearing in the third-order perturbation contribute
to power spectra to the second order. In this work the complete density and
velocity power spectra to the second order are derived. The power transfers
among different scales in the density power spectrum are estimated in the
context of Einstein's gravity. The relativistic corrections in the density
power spectrum are estimated to be smaller than the Newtonian one to the second
order, but these could be larger than higher-order nonlinear Newtonian terms.


title: Superdiffusion in the Dissipative Standard Map

abstract:
  We consider transport properties of the chaotic (strange) attractor along
unfolded trajectories of the dissipative standard map. It is shown that the
diffusion process is normal except of the cases when a control parameter is
close to some special values that correspond to the ballistic mode dynamics.
Diffusion near the related crisises is anomalous and non-uniform in time: there
are large time intervals during which the transport is normal or ballistic, or
even superballistic. The anomalous superdiffusion seems to be caused by
stickiness of trajectories to a non-chaotic and nowhere dense invariant Cantor
set that plays a similar role as cantori in Hamiltonian chaos. We provide a
numerical example of such a sticky set. Distribution function on the sticky set
almost coincides with the distribution function (SRB measure) of the chaotic
attractor.


title: A splitting theorem for holomorphic Banach bundles

abstract:
  This paper is motivated by Grothendieck's splitting theorem. In the 1960s,
Gohberg generalized this to a class of Banach bundles. We consider a compact
complex manifold $X$ and a holomorphic Banach bundle $E \to X$ that is a
compact perturbation of a trivial bundle in a sense recently introduced by
Lempert. We prove that $E$ splits into the sum of a finite rank bundle and a
trivial bundle, provided $H^{1}(X, \O)=0$.


title: Matrix subadditivity inequalities and block-matrices

abstract:
  Several subadditivity results and conjectures are given for matrices (or
operators), block-matrices, concave functions and norms.


title: Heterophasic oscillations in nanometer-size systems

abstract:
  Singularities in macroscopic systems at discontinuous phase transitions are
replaced in finite systems by sharp but continuous changes. Both the energy
differences between metastable and stable phases and the energy barriers
separating these phases decrease with decreasing particle number. Then, for
small enough systems, random heterophasic oscillations of the entire system
become an observable form of thermal motion. Under certain conditions, these
oscillations take the form of oscillatory nucleation. We discuss mechanisms and
observation conditions for these random transitions between phases.


title:
Moving frames on the twistor space of self-dual positive Einstein
  4-manifolds

abstract:
  The twistor space of self-dual positive Einstein manifolds naturally admits
two 1-parameter families of Riemannian metrics, one is the family of canonical
deformation metrics and the other is the family introduced by B. Chow and D.
Yang in 1989. The purpose of this paper is to compare these two families. In
particular we compare the Ricci tensor and the behavior under the Ricci flow of
these families. As an application, we propose a new proof to the fact that a
locally irreducible self-dual positive Einstein 4-manifold is isometric to
either $S^4$ with a standard metric or $\PP^2(\C)$ with a Fubini-Study metric.


title:
Change of Antiferromagnetic Structure near a Quantum Critical Point in
  CeRh1-xCoxIn5

abstract:
  The elastic neutron scattering experiments were carried out on the solid
solutions CeRh_{1-x}Co_xIn_5 to clarify the nature of the antiferromagnetic
(AF) state in the vicinity of the quantum critical point (QCP): x_c ~0.8. The
incommensurate AF order with the wave vector of q_h=(1/2,1/2,~0.3) observed in
pure CeRhIn_5 is weakly suppressed upon doping with Co, and a commensurate
q_c=(1/2,1/2,1/2) and an incommensurate q_1=(1/2,1/2,~0.42) AF structures
evolve at intermediate Co concentrations. These AF orders are enhanced at
x=0.7, and furthermore the q_h AF order vanishes. These results suggest that
the AF correlations with the q_c and q_1 modulations are significantly enhanced
in the intermediate x range, and may be connected with the evolution of the
superconductivity observed above x~0.3.


title:
Spin fluctuations and the "strange metal" behavior of a weakly doped
  antiferromagnet

abstract:
  We analyze the spectral properties of a phenomenological model for a weakly
doped two-dimensional antiferromagnet, in which the carriers move within one of
the two sublattices where they were introduced. Such a constraint results in
the free carrier spectra with the maxima at ${\bf k}=(\pm \pi /2 ,\pm \pi /2)$
observed in some cuprates. We consider the spectral properties of the model by
taking into account fluctuations of the spins in the antiferromagnetic
background. We show that such fluctuations lead to a non-pole-like structure of
the single-hole Green's function and these fluctuations can be responsible for
some anomalous "strange metal" properties of underdoped cuprates in the
nonsuperconducting regime.


title:
Phase-locking transition in a chirped superconducting Josephson
  resonator

abstract:
  By coupling a harmonic oscillator to a quantum system it is possible to
perform a dispersive measurement that is quantum non-demolition (QND), with
minimal backaction. A non-linear oscillator has the advantage of measurement
gain, but what is the backaction? Experiments on superconducting quantum bits
(qubits) coupled to a non-linear Josephson oscillator have thus far utilized
the switching of the oscillator near a dynamical bifurcation for sensitivity,
and have demonstrated partial QND measurement. The detailed backaction
associated with the switching process is complex, and may ultimately limit the
degree to which such a measurement can be QND. Here we demonstrate a new
dynamical effect in Josephson oscillators by which the bifurcation can be
accessed without switching. When energized with a frequency chirped drive with
an amplitude close to a sharp, phase-locking threshold, the oscillator evolves
smoothly in one of two diverging trajectories - a pointer for the state of a
qubit. The observed critical behavior agrees well with theory and suggests a
new modality for quantum state measurement.


title: Light Hadrons and New Enhancements in J/$\psi$ Decays at BESII

abstract:
  Based on 58 million $J/\psi$ samples collected by the BESII detector at the
BEPC, many mesons, baryons, and new resonances have been reported. Here, I will
review some recent results of glueball candidates and new enhancement.


title: The effect of atomic electrons on nuclear fission

abstract:
  We calculate correction to the nuclear fission barrier produced by the atomic
electrons. The result presented in analytical form is convenient to use in
future nuclear calculations. The atomic electrons have a small stabilizing
effect on nuclei, increasing lifetime in nuclear fission channel. This effect
gives a new instrument to study the fission process.


title:
Giant optical anisotropy in cylindrical self-assembled InAs/GaAs quantum
  rings

abstract:
  Using a single-particle atomistic pseudopotential method followed by a
many-particle configuration interaction method, we investigate the geometry,
electronic structure and optical transitions of a self-assembled InAs/GaAs
quantum ring (QR), changing its shape continously from a lens-shaped quantum
dot (QD) to a nearly one dimensional ring. We find that the biaxial strain in
the ring is strongly asymmetric in the plane perpendicular to the QR growth
direction, leading to giant optical anisotropy.


title: CP Asymmetries in B to f_0 K_S Decays

abstract:
  We consider the branching ratio and the CP asymmetries in B to f_0(980)K_S
decay to the end of determining the deviation of the time-dependent CP
asymmetry from sin(2 beta) arising from Standard Model physics. We obtain Delta
S_{f_0 K_S} within the context of the QCD factorization framework for the B to
f_0(980)K_S decay amplitudes assuming the f_0(980) is a q\bar{q} state and
employing a random scan over the theoretical parameter space to assess the
possible range in Delta S_{f_0 K_S}. Imposing the value of the experimental
branching ratio within 1 sigma and 3 sigma, respectively, of its central value
as a constraint, we find the range of Delta S_{f_0 K_S} to be [0.018, 0.033]
for a scan in which the parameters are allowed to vary within 1 sigma of their
central values and the range [-0.019, 0.064] for a scan in which the parameters
vary within 3 sigma of their central values.


title: Alternating, pattern-avoiding permutations

abstract:
  We study the problem of counting alternating permutations avoiding
collections of permutation patterns including 132. We construct a bijection
between the set S_n(132) of 132-avoiding permutations and the set A_{2n +
1}(132) of alternating, 132-avoiding permutations. For every set p_1, ..., p_k
of patterns and certain related patterns q_1, ..., q_k, our bijection restricts
to a bijection between S_n(132, p_1, ..., p_k), the set of permutations
avoiding 132 and the p_i, and A_{2n + 1}(132, q_1, ..., q_k), the set of
alternating permutations avoiding 132 and the q_i. This reduces the enumeration
of the latter set to that of the former.


title: New Flavor Interactions at the LHC

abstract:
  For a new family-nonuniversal gauge interaction to be accessible at the LHC
it will most likely couple preferentially to the third family. By coupling to
all members of the third family the production of a new gauge boson (the $X$
with $M_X\approx1$ TeV) will lead to final states with a distinctive
$\tau^+\tau^-$ pair. We study the mass reconstruction of the $X$ and the cuts
that can enhance signal to background. The $X$ boson should be associated with
the physics of flavor and in the simplest picture a fourth family. We discuss
how the mass mixing between the third and fourth families affects the $X$
couplings and a possible mixing with the $Z$.


title:
Search for synchrotron emission from secondary leptons in dense cold
  starless cores

abstract:
  We report radio continuum observations with the Australia Telescope Compact
Array of two molecular clouds. The impetus for these observations is a search
for synchrotron radiation by cosmic ray secondary electrons/positrons in a
region of enhanced density and possibly high magnetic field. We present
modelling which shows that there should be an appreciable flux of synchrotron
above the more diffuse, galactic synchrotron background.
  The starless core G333.125-0.562 and infrared source IRAS 15596-5301 were
observed at 1384 and 2368 MHz. For G333.125-0.562, we find no significant
levels of radio emission from this source at either frequency, nor any
appreciable polarisation: we place an upper limit on the radio continuum flux
from this source of 0.5 mJy per beam at both 1384 and 2368 MHz. Due to the
higher than expected flux density limits, we also obtained archival ATCA data
at 8640 MHz for this cloud and place an upper limit on the flux density of 50
micro-Jy per beam. Assuming the cosmic ray spectrum is similar to that near the
Sun, and given the cloud's molecular density and mass, we place an upper limit
on the magnetic field of 500 micro-G. IRAS 15596-5301, with an RMS of 50
micro-Jy per beam at 1384 MHz, shows an HII region consistent with optically
thin free-free emission already detected at 4800 MHz. We use the same
prescription as G333 to constrain the magnetic field from this cloud to be less
than 500 micro-G. We find that these values are not inconsistent with the view
that magnetic field values scale with the average density of the molecular
cloud.


title: On a set of transformations of Gaussian random functions

abstract:
  We consider a set of one-dimensional transformations of Gaussian random
functions. Under natural assumptions we obtain a connection between $L_2$-small
ball asymptotics of the transformed function and of the original one. Also the
explicit Karhunen -- Lo\'eve expansion is obtained for a proper class of
Gaussian processes.


title: Heavy-Tailed Limits for Medium Size Jobs and Comparison Scheduling

abstract:
  We study the conditional sojourn time distributions of processor sharing
(PS), foreground background processor sharing (FBPS) and shortest remaining
processing time first (SRPT) scheduling disciplines on an event where the job
size of a customer arriving in stationarity is smaller than exactly k>=0 out of
the preceding m>=k arrivals. Then, conditioning on the preceding event, the
sojourn time distribution of this newly arriving customer behaves
asymptotically the same as if the customer were served in isolation with a
server of rate (1-\rho)/(k+1) for PS/FBPS, and (1-\rho) for SRPT, respectively,
where \rho is the traffic intensity. Hence, the introduced notion of
conditional limits allows us to distinguish the asymptotic performance of the
studied schedulers by showing that SRPT exhibits considerably better asymptotic
behavior for relatively smaller jobs than PS/FBPS.
  Inspired by the preceding results, we propose an approximation to the SRPT
discipline based on a novel adaptive job grouping mechanism that uses relative
size comparison of a newly arriving job to the preceding m arrivals.
Specifically, if the newly arriving job is smaller than k and larger than m-k
of the previous m jobs, it is routed into class k. Then, the classes of smaller
jobs are served with higher priorities using the static priority scheduling.
The good performance of this mechanism, even for a small number of classes m+1,
is demonstrated using the asymptotic queueing analysis under the heavy-tailed
job requirements. We also discuss refinements of the comparison grouping
mechanism that improve the accuracy of job classification at the expense of a
small additional complexity.


title: Recent results from KLOE

abstract:
  In this report I will present the recent results on K mesons from the KLOE
experiment at the DAFNE e+e- collider working at the center of mass energy
~1GeV ~m_{phi}. They include V_{us} determinations, the test on the unitarity
of the first row of the CKM matrix and the related experimental measurements.
Tests of lepton universality from leptonic and semileptonic decays will be also
discussed. Then I will present tests of quantum coherence, CPT and Lorentz
symmetry performed by studying the time evolution of the neutral kaon system.


title: Macro-coherent two photon and radiative neutrino pair emission

abstract:
  We discuss a possibility of detecting a coherent photon pair emission and
related radiative neutrino pair emission from excited atoms. It is shown that
atoms of lambda- and ladder-type three level system placed in a pencil-like
cylinder give a back to back emission of two photons of equal energy
$\Delta/2$, sharply peaked with a width $\propto $ 1/(target size) and well
collimated along the cylinder axis. This process has a measurable rate
$\propto$ (target number density) $^2 \times$ target volume, while a broader
spectral feature of one-photon distribution separated by (mass sum of a
neutrino pair)$^2/(2\Delta)$ from the two photon peak may arise from radiative
neutrino pair emission, with a much smaller rate.


title: Confidence regions for the multinomial parameter with small sample size

abstract:
  Consider the observation of n iid realizations of an experiment with d>1
possible outcomes, which corresponds to a single observation of a multinomial
distribution M(n,p) where p is an unknown discrete distribution on {1,...,d}.
In many applications, the construction of a confidence region for p when n is
small is crucial. This concrete challenging problem has a long history. It is
well known that the confidence regions built from asymptotic statistics do not
have good coverage when n is small. On the other hand, most available methods
providing non-asymptotic regions with controlled coverage are limited to the
binomial case d=2. In the present work, we propose a new method valid for any
d>1. This method provides confidence regions with controlled coverage and small
volume, and consists of the inversion of the "covering collection"' associated
with level-sets of the likelihood. The behavior when d/n tends to infinity
remains an interesting open problem beyond the scope of this work.


title:
Improved search for galactic white dwarf binaries in Mock LISA Data
  Challenge 1B using an F-statistic template bank

abstract:
  We report on our F-statistic search for white-dwarf binary signals in the
Mock LISA Data Challenge 1B (MLDC1B). We focus in particular on the
improvements in our search pipeline since MLDC1, namely refinements in the
search pipeline and the use of a more accurate detector response (rigid
adiabatic approximation). The search method employs a hierarchical
template-grid based exploration of the parameter space, using a coincidence
step to distinguish between primary (``true'') and secondary maxima, followed
by a final (multi-TDI) ``zoom'' stage to provide an accurate parameter
estimation of the final candidates.


title: Nuclear limits on gravitational waves from elliptically deformed pulsars

abstract:
  Gravitational radiation is a fundamental prediction of General Relativity.
Elliptically deformed pulsars are among the possible sources emitting
gravitational waves (GWs) with a strain-amplitude dependent upon the star's
quadrupole moment, rotational frequency, and distance from the detector. We
show that the gravitational wave strain amplitude $h_0$ depends strongly on the
equation of state of neutron-rich stellar matter. Applying an equation of state
with symmetry energy constrained by recent nuclear laboratory data, we set an
upper limit on the strain-amplitude of GWs produced by elliptically deformed
pulsars. Depending on details of the EOS, for several millisecond pulsars at
distances $0.18kpc$ to $0.35kpc$ from Earth, the {\it maximal} $h_0$ is found
to be in the range of $\sim[0.4-1.5]\times 10^{-24}$. This prediction serves as
the first {\it direct} nuclear constraint on the gravitational radiation. Its
implications are discussed.


title:
Lower Bound for the Communication Complexity of the Russian Cards
  Problem

abstract:
  In this paper it is shown that no public announcement scheme that can be
modeled in Dynamic Epistemic Logic (DEL) can solve the Russian Cards Problem
(RCP) in one announcement. Since DEL is a general model for any public
announcement scheme we conclude that there exist no single announcement
solution to the RCP. The proof demonstrates the utility of DEL in proving lower
bounds for communication protocols. It is also shown that a general version of
RCP has no two announcement solution when the adversary has sufficiently large
number of cards.


title:
On the Rankin-Selberg problem: higher power moments of the Riesz mean
  error term

abstract:
  Let $\Delta_1(x;\phi)$ be the error term of the first Riesz means of the
Rankin-Selberg zeta function. We study the higher power moments of
$\Delta_1(x;\phi)$ and derive an asymptotic formula for 3-rd, 4-th and 5-th
power moments by using Ivi\'c 's large value arguments.


title:
On Berry--Esseen bounds for non-instantaneous filters of linear
  processes

abstract:
  Let $X_n=\sum_{i=1}^{\infty}a_i\epsilon_{n-i}$, where the $\epsilon_i$ are
i.i.d. with mean 0 and at least finite second moment, and the $a_i$ are assumed
to satisfy $|a_i|=O(i^{-\beta})$ with $\beta >1/2$. When $1/2<\beta<1$, $X_n$
is usually called a long-range dependent or long-memory process. For a certain
class of Borel functions $K(x_1,...,x_{d+1})$, $d\ge0$, from
${\mathcal{R}}^{d+1}$ to $\mathcal{R}$, which includes indicator functions and
polynomials, the stationary sequence $K(X_n,X_{n+1},...,X_{n+d})$ is
considered. By developing a finite orthogonal expansion of
$K(X_n,...,X_{n+d})$, the Berry--Esseen type bounds for the normalized sum
$Q_N/\sqrt{N},Q_N=\sum_{n=1}^N(K(X_
n,...,X_{n+d})-\mathrm{E}K(X_n,...,X_{n+d}))$ are obtained when $Q_N/\sqrt{N}$
obeys the central limit theorem with positive limiting variance.


title:
Pseudogap and short-range antiferromagnetic correlation controlled Fermi
  surface in underdoped cuprates: From Fermi arc to electron pocket

abstract:
  Motivated by recent quantum oscillation observations in the underdoped
high-temperature superconductors, the effect of the short-range
antiferromagnetic correlations on the electronic properties of the short-ranged
d-density wave state is investigated. At intermediate d-density wave
correlations, the cross section of the energy dispersion at the Fermi energy
consists of hole pockets and an electron pocket. It is argued that the electron
pocket feature is smeared out by the effect of the short-range
antiferromagnetic correlation, which could be the reason why any electron
pockets have never been observed in the angle resolved photoemission
experiments. The Hall resistance is calculated for the system with the electron
band and the hole band using a finite temperature formula assuming Dirac
fermion spectrum for the latter. It is argued that the scattering effect in the
hole band should be anomalously large or much suppressed by superconductivity
correlations and/or vortex contributions to explain the recent quantum
oscillation observations.


title: Number of Least Area Planes in Gromov Hyperbolic 3-Spaces

abstract:
  We show that for a generic simple closed curve C in the asymptotic boundary
of a Gromov hyperbolic 3-space with cocompact metric X, there exist a unique
least area plane P in X with asymptotic boundary C. This result has interesting
topological applications for constructions of canonical 2-dimensional objects
in 3-manifolds.


title:
Loop Group Decompositions in Almost Split Real Forms and Applications to
  Soliton Theory and Geometry

abstract:
  We prove a global Birkhoff decomposition for almost split real forms of loop
groups, when an underlying finite dimensional Lie group is compact. Among
applications, this shows that the dressing action - by the whole subgroup of
loops which extend holomorphically to the exterior disc - on the $U$-hierarchy
of the ZS-AKNS systems, on curved flats and on various other integrable
systems, is global for compact cases. It also implies a global infinite
dimensional Weierstrass-type representation for Lorentzian harmonic maps (1+1
wave maps) from surfaces into compact symmetric spaces. An "Iwasawa-type"
decomposition of the same type of real form, with respect to a fixed point
subgroup of an involution of the second kind, is also proved, and an
application given.


title:
The dbar steepest descent method for orthogonal polynomials on the real
  line with varying weights

abstract:
  We obtain Plancherel-Rotach type asymptotics valid in all regions of the
complex plane for orthogonal polynomials with varying weights of the form
$e^{-NV(x)}$ on the real line, assuming that $V$ has only two Lipschitz
continuous derivatives and that the corresponding equilibrium measure has
typical support properties. As an application we extend the universality class
for bulk and edge asymptotics of eigenvalue statistics in unitary invariant
Hermitian random matrix theory. Our methodology involves developing a new
technique of asymptotic analysis for matrix Riemann-Hilbert problems with
nonanalytic jump matrices suitable for analyzing such problems even near
transition points where the solution changes from oscillatory to exponential
behavior.


title: P&P protocol: local coordination of mobile sensors for self-deployment

abstract:
  The use of mobile sensors is of great relevance for a number of strategic
applications devoted to monitoring critical areas where sensors can not be
deployed manually. In these networks, each sensor adapts its position on the
basis of a local evaluation of the coverage efficiency, thus permitting an
autonomous deployment.
  Several algorithms have been proposed to deploy mobile sensors over the area
of interest. The applicability of these approaches largely depends on a proper
formalization of rigorous rules to coordinate sensor movements, solve local
conflicts and manage possible failures of communications and devices.
  In this paper we introduce P&P, a communication protocol that permits a
correct and efficient coordination of sensor movements in agreement with the
PUSH&PULL algorithm. We deeply investigate and solve the problems that may
occur when coordinating asynchronous local decisions in the presence of an
unreliable transmission medium and possibly faulty devices such as in the
typical working scenario of mobile sensor networks.
  Simulation results show the performance of our protocol under a range of
operative settings, including conflict situations, irregularly shaped target
areas, and node failures.


title:
Uniqueness theorem for stationary black ring solution of $\sigma$-models
  in five dimensions

abstract:
  We study axisymmetric self-gravitating non-linear $\sigma$-model in
five-dimensional spacetime admitting three commutating Killing vector fields.
We show that the only asymptotically flat black ring solution with a regular
event horizon is the black ring characterized by mass and two angular momenta
with constant mapping.


title:
The high activity of 3C 454.3 in autumn 2007. Monitoring by the WEBT
  during the AGILE detection

abstract:
  The quasar-type blazar 3C 454.3 underwent a phase of high activity in summer
and autumn 2007, which was intensively monitored in the radio-to-optical bands
by the Whole Earth Blazar Telescope (WEBT). The gamma-ray satellite AGILE
detected this source first in late July, and then in November-December 2007. In
this letter we present the multifrequency data collected by the WEBT and
collaborators during the second AGILE observing period, complemented by a few
contemporaneous data from UVOT onboard the Swift satellite. The aim is to trace
in detail the behaviour of the synchrotron emission from the blazar jet, and to
investigate the contribution from the thermal emission component. Optical data
from about twenty telescopes have been homogeneously calibrated and carefully
assembled to construct an R-band light curve containing about 1340 data points
in 42 days. This extremely well-sampled optical light curve allows us to follow
the dramatic flux variability of the source in detail. In addition, we show
radio-to-UV spectral energy distributions (SEDs) at different epochs, which
represent different brightness levels. In the considered period, the source
varied by 2.6 mag in a couple of weeks in the R band. Many episodes of fast
(i.e. intranight) variability were observed, most notably on December 12, when
a flux increase of about 1.1 mag in 1.5 hours was detected, followed by a steep
decrease of about 1.2 mag in 1 hour. The contribution by the thermal component
is difficult to assess, due to the uncertainties in the Galactic, and possibly
also intrinsic, extinction in the UV band. However, polynomial fitting of
radio-to-UV SEDs reveals an increasing spectral bending going towards fainter
states, suggesting a UV excess likely due to the thermal emission from the
accretion disc.


title:
Phenomenological theory of magnetization reversal in nanosystems with
  competing anisotropies

abstract:
  The interplay between intrinsic and surface/interface-induced magnetic
anisotropies strongly in- fluences magnetization processes in nanomagnetic
systems. We develop a micromagnetic theory to describe the field-driven
reorientation in nanomagnets with cubic and uniaxial anisotropies. Spin
configurations in competing phases and parameters of accompanying multidomain
states are calculated as functions of the applied field and the magnetic
anisotropies. The constructed magnetic phase diagrams allow to classify
different types of the magnetization reversal and to provide detailed analysis
of the switching processes in magnetic nanostructures. The calculated
magnetization profiles of isolated domain walls show that the equilibrium
parameters of such walls are extremely sensitive to applied magnetic field and
values of the competing anisotropies and can vary in a broad range. For
nanolayers with perpendicular anisotropy the geometrical parameters of stripe
domains have been calculated as functions of a bias field. The results are
applied to analyse the magnetization processes as observed in various
nanosystems with competing anisotropies, mainly, in diluted magnetic
semiconductor films (Ga,Mn)As.


title:
On the symmetry of arithmetical functions in almost all short
  intervals,IV

abstract:
  We study the arithmetic (real) function, with f 'essentially bounded'. In
particular, we obtain non-trivial bounds, through f 'correlations', for the
'Selberg integral' and the 'symmetry integral' of f in almost all short
intervals $[x-h,x+h]$, $N\le x\le 2N$, beyond the 'classical' level, up to a
very high level of distribution (for $h$ not too small). This time we go beyond
Large Sieve inequality. Precisely, our method applies Weil bound for
Kloosterman sums.


title: Cooper Pair Boxes Weakly Coupled to External Environments

abstract:
  We study the behaviour of charge oscillations in Superconducting Cooper Pair
Boxes weakly interacting with an environment. We found that, due to the noise
and dissipation induced by the environment, the stability properties of these
nanodevices differ according to whether the charge oscillations are interpreted
as an effect of macroscopic quantum coherence, or semiclassically in terms of
the Gross-Pitaevskii equation. More specifically, occupation number states,
used in the quantum interpretation of the oscillations, are found to be much
more unstable than coherent ones, typical of the semiclassical explanation.


title:
Goos-Haenchen shift and localization of optical modes in deformed
  microcavities

abstract:
  Recently, an interesting phenomenon of spatial localization of optical modes
along periodic ray trajectories near avoided resonance crossings has been
observed [J. Wiersig, Phys. Rev. Lett. 97, 253901 (2006)]. For the case of a
microdisk cavity with elliptical cross section we use the Husimi function to
analyse this localization in phase space. Moreover, we present a semiclassical
explanation of this phenomenon in terms of the Goos-Haenchen shift which works
very well even deep in the wave regime. This semiclassical correction to the
ray dynamics modifies the phase space structure such that modes can localize
either on stable islands or along unstable periodic ray trajectories.


title: Ground-state properties of one-dimensional anyon gases

abstract:
  We investigate the ground state of the one-dimensional interacting anyonic
system based on the exact Bethe ansatz solution for arbitrary coupling constant
($0\leq c\leq \infty$) and statistics parameter ($0\leq \kappa \leq \pi$). It
is shown that the density of state in quasi-momentum $k$ space and the ground
state energy are determined by the renormalized coupling constant $c'$. The
effect induced by the statistics parameter $\kappa$ exhibits in the momentum
distribution in two aspects: Besides the effect of renormalized coupling, the
anyonic statistics results in the nonsymmetric momentum distribution when the
statistics parameter $\kappa$ deviates from 0 (Bose statistics) and $\pi$
(Fermi statistics) for any coupling constant $c$. The momentum distribution
evolves from a Bose distribution to a Fermi one as $\kappa$ varies from 0 to
$\pi$. The asymmetric momentum distribution comes from the contribution of the
imaginary part of the non-diagonal element of reduced density matrix, which is
an odd function of $\kappa$. The peak at positive momentum will shift to
negative momentum if $\kappa$ is negative.


title: Invariant-mass distribution of cc-bar in Upsilon(1S) -> cc-bar + X

abstract:
  We calculate the invariant-mass distribution for the cc-bar pair produced in
the inclusive Upsilon(1S) decay based on the color-singlet mechanism of the
nonrelativistic quantum chromodynamics factorization approach at leading order
in the bottom-quark velocity v_b in the meson rest frame. As the short-distance
processes, we consider bb-bar -> g^*gg followed by g^* -> cc-bar and bb-bar ->
gamma^* -> cc-bar at leading order in the strong coupling. The invariant-mass
distribution of the bb-bar -> cc-bar gg contribution has a sharp peak just
above the threshold and that of the bb-bar -> gamma^* -> cc-bar channel is
concentrated at the maximally allowed kinematic end point. We predict that
Gamma[Upsilon(1S) -> cc-bar+X]/Gamma[Upsilon(1S)->light hadrons] = 0.065
alpha_s, which is smaller than a previous result by about 20%.


title: QUaD: A High-Resolution Cosmic Microwave Background Polarimeter

abstract:
  We describe the QUaD experiment, a millimeter-wavelength polarimeter designed
to observe the Cosmic Microwave Background (CMB) from a site at the South Pole.
The experiment comprises a 2.64 m Cassegrain telescope equipped with a
cryogenically cooled receiver containing an array of 62 polarization-sensitive
bolometers. The focal plane contains pixels at two different frequency bands,
100 GHz and 150 GHz, with angular resolutions of 5 arcmin and 3.5 arcmin,
respectively. The high angular resolution allows observation of CMB temperature
and polarization anisotropies over a wide range of scales. The instrument
commenced operation in early 2005 and collected science data during three
successive Austral winter seasons of observation.


title: Sneutrino cold dark matter in extended MSSM models

abstract:
  A thorough analysis of sneutrinos as dark matter candidates is performed, in
different classes of supersymmetric models, as is typically done for the
neutralino dark matter. First in the Minimal Supersymmetric Standard Model,
sneutrinos are marginally compatible with existing experimental bounds,
including direct detection, provided they compose a subdominant component of
dark matter. Then supersymmetric models with the inclusion of right-handed
fields and lepton number violating terms are presented. These models are
perfectly viable: they predict sneutrinos which are compatible with the current
direct detection sensitivities.


title: New Physics and the LHC

abstract:
  In these lectures I start by briefly reviewing the status of the electroweak
theory, in the Standard Model and beyond. I then discuss the motivation and the
possible avenues for new physics, on the brink of the LHC start.


title:
Full characterization of Gaussian bipartite entangled states by a single
  homodyne detector

abstract:
  We present the full experimental reconstruction of Gaussian entangled states
generated by a type--II optical parametric oscillator (OPO) below threshold.
Our scheme provides the entire covariance matrix using a single homodyne
detector and allows for the complete characterization of bipartite Gaussian
states, including the evaluation of purity, entanglement and nonclassical
photon correlations, without a priori assumptions on the state under
investigation. Our results show that single homodyne schemes are convenient and
robust setups for the full characterization of OPO signals and represent a tool
for quantum technology based on continuous variable entanglement.


title:
Textural properties of synthetic nano-calcite produced by hydrothermal
  carbonation of calcium hydroxide

abstract:
  The hydrothermal carbonation of calcium hydroxide (Ca(OH)2) at high pressure
of CO2 (initial PCO2 1/4 55 bar) and moderate to high temperature (30 and 90
1C) was used to synthesize fine particles of calcite. This method allows a high
carbonation efficiency (about 95% of Ca(OH)2-CaCO3 conversion), a significant
production rate (48 kg/m3 h) and high purity of product (about 96%). However,
the various initial physicochemical conditions have a strong influence on the
crystal size and surface area of the synthesized calcite crystals. The present
study is focused on the estimation of the textural properties of synthesized
calcite (morphology, specific surface area, average particle size, particle
size distribution and particle size evolution with reaction time), using
Rietveld refinements of X-ray diffraction (XRD) spectra, Brunauer-Emmett-Teller
(BET) measurements, and scanning electron microscope (SEM) and transmission
electron microscope (TEM) observations. This study demonstrate that the
pressure, the temperature and the dissolved quantity of CO2 have a significant
effect on the average particle size, specific surface area, initial rate of
precipitation, and on the morphology of calcium carbonate crystals. In
contrast, these PTx conditions used herein have an insignificant effect on the
carbonation efficiency of Ca(OH)2. Finally, the results presented here
demonstrate that nano-calcite crystals with high specific surface area (SBET
1/4 6-10m2/g) can be produced, with a high potential for industrial
applications such as adsorbents and/or filler in papermaking industry.


title:
Conditional relaxation of a charge state under continuous weak
  measurement

abstract:
  We investigate the conditional evolution of a charge state coupled to a
mesoscopic detector under continuous weak measurement. The state suffers
relaxation into a particular state with a definite charge when electrons in a
particular output lead are monitored in the detector. The process of the
conditional relaxation is not restricted by the shot noise of the detector,
unlike the case of the back-action dephasing. As a result, the relaxation of
conditional evolution is much faster than the current-sensitive part of
dephasing. Furthermore, the direction of the relaxation depends on the choice
of the output lead. We propose that these properties can be verified in a
two-path interferometer containing a quantum dot capacitively coupled to a
detector. In this setup, the current-current correlation between the
interferometer and the detector reveals characteristic features of conditional
relaxation.


title:
Structure of the spaces of matrix monotone functions and of matrix
  convex functions and Jensen's type inequality for operators

abstract:
  Let $n \in \N$ and $M_n$ be the algebra of $n \times n$ matrices. We call a
function $f$ matrix monotone of order $n$ or $n$-monotone in short whenever the
inequality $f(a) \leq f(b)$ holds for every pair of selfadjoint matrices $a, b
\in M_n$ such that $a \leq b$ and all eigenvalues of $a$ and $b$ are contained
in $I$. Matrix convex (concave) functions on $I$ are similarily defined. The
spaces for $n$-monotone functions and $n$-convex functions are written as
$P_n(I)$ and $K_n(I)$. In this note we discuss several assertions at each leven
$n$ for which we regard themas the problems of double piling structure of those
sequences $\{P_n(I)\}_{n\in\N}$ and $\{K_n(I)\}_{n\in\N}$. In order to see
clear insight of the aspect of the problems, however, we choose the following
three main assertions among them and discuss their mutual dependence:
  \begin{enumerate} \item[(i)] $f(0)\leq 0$ and $f$ is $n$-convex in
$[0,\alpha)$, \item[(ii)] For each matrix $a$ with its spectrum in $[0,\alpha)$
and a contraction $c$ in the matrix algebra $M_n$,
  \[ f(c^{\star}a c)\leq c^{\star}f(a)c, \] \item[(iii)] The functon $g(t)/t$
is $n$-monotone in $(0,\alpha)$. \end{enumerate}
  In particular, we show that for any $n \in \N$ two conditions $(ii)$ and
$(iii)$ are equivalent.


title: A New N=4 Membrane Action via Orbifold

abstract:
  We propose a new Lagrangian describing N=4 superconformal field theory in
three dimensions. This theory is believed to describe interacting field theory
on the worldvolume of a M2-brane on an orbifold, and is obtained as a
Z_2-quotient of the theory proposed by Bagger and Lambert. Despite unusual
Chan-Paton structures, we can take Z_2-orbifold by using SU(2)\times SU(2)
bifundamental representations. We also analyze the moduli space of this theory
and found three branches. With an assumption of a broken U(1) symmetry, the
moduli space is consistent with that of the D2-brane in the strong coupling
limit of Type IIA string theory if the gauge group is O(4). Our action has
manifest Z_2-symmetry exchanging two R^4/Z_2's in M-theory, and this suggests a
new non-perturbative duality between a O2^{-}-brane on orbifold R^4/Z_2 and a
O2^{-}-brane with D6-branes.


title: Stochastic Inflation and Dimensional Reduction

abstract:
  We present a replica field-theoretic approach to stochastic inflation in
which a manifestation of dimensional reduction is found. The scale above which
the latter dominates grows exponentially fast with time and thus affects
largest super-horizon scales. We find inevitable modifications of the spectral
index on those scales. An explicit relation between the noise correlator and
the non-gaussianity parameter f_NL is found.


title:
Spinodal instabilities of asymmetric nuclear matter within the
  Brueckner--Hartree--Fock approach

abstract:
  We study the spinodal instabilities of asymmetric nuclear matter at finite
temperature within the microscopic Brueckner--Hartree--Fock (BHF) approximation
using the realistic Argonne V18 nucleon-nucleon potential plus a three-body
force of Urbana type. Our results are compared with those obtained with the
Skyrme force SLy230a and the relativistic mean field models NL3 and TW. We find
that BHF predicts a larger spinodal region. This result is a direct consequence
of the fact that our Brueckner calculation predicts a larger critical
temperature and saturation density of symmetric nuclear matter than the Skyrme
and relativistic mean field ones. We find that the instability is always
dominated by total density fluctuations, in agreement with previous results of
other authors. We study also the restoration of the isospin symmetry in the
liquid phase, {\it i.e.,} the so-called isospin distillation or fragmentation
effect, finding that its efficiency increases with increasing proton fraction
and decreases as temperature and density increase. In general, we find that the
Brueckner results are comparable to those obtained with the Skyrme and the
relativistic mean field models, although the restoration of isospin symmetry is
not so efficient in this case.


title:
A modification of the h-index: the hm-index accounts for multi-authored
  manuscripts

abstract:
  In order to take multiple co-authorship appropriately into account, a
straightforward modification of the Hirsch index was recently proposed.
Fractionalised counting of the papers yields an appropriate measure which is
called the hm-index. The effect of this procedure is compared in the present
work with other variants of the h-index and found to be superior to the
fractionalised counting of citations and to the normalization of the h-index
with the average number of authors in the h-core. Three fictitious examples for
model cases and one empirical case are analysed.


title:
Constraints on the CKM angle gamma in B^0 --> barD^0 (D^0) K^*0 from a
  Dalitz analysis of D^0 --> K_S pi^+ pi^-

abstract:
  We present constraints on the angle gamma of the Unitarity Triangle with a
Dalitz analysis of neutral D decays to K_Spi^+pi^- from the processes B^0 ->
barD^0 K^*0 (barB^0 -> D^0 barK^*0) and B0 -> D0 K*0 (barB^0 -> barD^0 barK^*0)
with K^*0 -> K^+pi^- (barK^*0 -> K^-pi^+). Using a sample of 371 10^6 BBbar
pairs collected with the Babar detector at PEP-II, we measure the angle gamma
as a function of r_S, the magnitude of the average ratio between b -> u and b
-> c amplitudes. Combining this result with the available information on r_S,
we obtain gamma = (162 +- 56) degrees or (342 +- 56) degrees and r_S<0.55 at
95% probability.


title: Stochastic analysis on Gaussian space applied to drift estimation

abstract:
  In this paper we consider the nonparametric functional estimation of the
drift of Gaussian processes using Paley-Wiener and Karhunen-Lo\`eve expansions.
We construct efficient estimators for the drift of such processes, and prove
their minimaxity using Bayes estimators. We also construct superefficient
estimators of Stein type for such drifts using the Malliavin integration by
parts formula and stochastic analysis on Gaussian space, in which superharmonic
functionals of the process paths play a particular role. Our results are
illustrated by numerical simulations and extend the construction of James-Stein
type estimators for Gaussian processes by Berger and Wolper.


title:
Currents and Flat Chains Associated to Varifolds, with an Application to
  Mean Curvature Flow

abstract:
  We prove under suitable hypotheses that convergence of integral varifolds
implies convergence of associated mod 2 flat chains and subsequential
convergence of associated integer-multiplicity rectifiable currents. The
convergence results imply restrictions on the kinds of singularities that can
occur in mean curvature flow.


title: Precision predictions for Z' production at the LHC

abstract:
  We present precision calculations of the transverse-momentum spectrum, the
invariant-mass distribution and the total cross section for Z' production at
hadron colliders. We implement joint resummation at the next-to-leading
logarithmic accuracy and consistently match the obtained result with the pure
perturbative result at the first order in the strong coupling constant. We
confront our numerical predictions with the Monte Carlo generator PYTHIA and
with a new implementation of extra neutral gauge bosons in the Monte Carlo
generator MC@NLO. The impact of scale dependence is also studied.


title: Brown-Henneaux's Canonical Approach to Topologically Massive Gravity

abstract:
  We analyze the symmetry realized asymptotically on the two dimensional
boundary of AdS_3 geometry in topologically massive gravity, which consists of
the gravitational Chern-Simons term as well as the usual Einstein-Hilbert and
negative cosmological constant terms. Our analysis is based on the conventional
canonical method and proceeds along the line completely parallel to the
original Brown and Henneaux's. In spite of the presence of the gravitational
Chern-Simons term, it is confirmed by the canonical method that the boundary
theory actually has the conformal symmetry satisfying the left and right moving
Virasoro algebras. The central charges of the Virasoro algebras are computed
explicitly and are shown to be left-right asymmetric due to the gravitational
Chern-Simons term. It is also argued that the Cardy's formula for the BTZ black
hole entropy capturing all higher derivative corrections agrees with the
extended version of the Wald's entropy formula. The M5-brane system is
illustrated as an application of the present calculation.


title: Density of critical clusters in strips of strongly disordered systems

abstract:
  We consider two models with disorder dominated critical points and study the
distribution of clusters which are confined in strips and touch one or both
boundaries. For the classical random bond Potts model in the large-q limit we
study optimal Fortuin-Kasteleyn clusters by combinatorial optimization
algorithm. For the random transverse-field Ising chain clusters are defined and
calculated through the strong disorder renormalization group method. The
numerically calculated density profiles close to the boundaries are shown to
follow scaling predictions. For the random bond Potts model we have obtained
accurate numerical estimates for the critical exponents and demonstrated that
the density profiles are well described by conformal formulae.


title: Dynamical scaling of imbibition in columnar geometries

abstract:
  Recent experiments of imbibition in columnar geometries show interfacial
fluctuations whose dynamic scaling is not compatible with the usual non local
model governed by surface tension that results from a macroscopic description.
To explore this discrepancy, we exhaustively analyze numerical integrations of
a phase-field model with dichotomic columnar disorder. We find that two
distinct behaviors are possible depending on the capillary contrast between
both values of disorder. In a high contrast case, where interface evolution is
mainly dominated by the disorder, an inherent anomalous scaling is always
observed. Moreover, in agreement with experimental work, the interface motion
has to be described through a local model. On the other hand, in a lower
contrast case, interface is dominated by interfacial tension and can be well
modeled by a non local model. We have studied both spontaneous and forced-flow
imbibition situations, giving a complete set of scaling exponent in each case,
as well as, a comparison to the experimental results.


title:
Machine studies for the development of storage cells at the ANKE
  facility of COSY

abstract:
  We present a measurement of the transverse intensity distributions of the
COSY proton beam at the target interaction point at ANKE at the injection
energy of 45 MeV, and after acceleration at 2.65 GeV. At 2.65 GeV, the machine
acceptance was determined as well. From the intensity distributions the beam
size is determined, and together with the measured machine acceptance, the
dimensions of a storage cell for the double-polarized experiments with the
polarized internal gas target at the ANKE spectrometer are specified. An
optimum storage cell for the ANKE experiments should have dimensions of 15mm x
20mm x 390mm (vertical x horizontal x longitudinal), whereby a luminosity of
about 2.5*10^29 cm^-2*s^-1 with beams of 10^10 particles stored in COSY could
be reached.


title: Massless fermions in multi-flavor QED_2

abstract:
  The ground state of the multi-flavor 2-dimensional quantum electrodynamics
(QED_2) is determined in the presence of finite baryon density, and it is shown
that the model possesses two phases, the low density phase where the external
baryon density is totally screened, and the high density phase, where the
screening is only partial. The renormalization of the bosonized version of the
model is also performed for both the zero and the finite density model giving
massless multi-flavor QED_2 in both cases.


title:
Faddeev and Glauber Calculations at Intermediate Energies in a Model for
  n+d Scattering

abstract:
  Obtaining cross sections for nuclear reactions at intermediate energies based
on the Glauber formulation has a long tradition. Only recently the energy
regime of a few hundred MeV has become accessible to ab-initio Faddeev
calculations of three-body scattering. In order to go to higher energies, the
Faddeev equation for three-body scattering is formulated and directly solved
without employing a partial wave decomposition. In the simplest form the
Faddeev equation for interacting scalar particles is a three-dimensional
integral equation in five variables, from which the total cross section, the
cross sections for elastic scattering and breakup reactions, as well as
differential cross sections are obtained. The same observables are calculated
based on the Glauber formulation. The first order Glauber calculation and the
Glauber rescattering corrections are compared in detail with the corresponding
terms of the Faddeev multiple scattering series for projectile energies between
100 MeV and 2 GeV.


title:
The Kolmogorov operator associated to a Burgers SPDE in spaces of
  continuous functions

abstract:
  We are concerned with a viscous Burgers equation forced by a perturbation of
white noise type. We study the corresponding transition semigroup in a space of
continuous functions weighted by a proper potential, and we show that the
infinitesimal generator is the closure (with respect to a suitable topology) of
the Kolmogorov operator associated to the stochastic equation. In the last part
of the paper we use this result to solve the corresponding Fokker-Planck
equation.


title: Lorentz violation dispersion relation and its application

abstract:
  We derive a modified dispersion relation (MDR) in the Lorentz violation
extension of quantum electrodynamics (QED) sector in the standard model
extension (SME) framework. Based on the extended Dirac equation and
corresponding MDR, we observe the resemblance of the Lorentz violation coupling
with spin-gravity coupling. We also develop a neutrino oscillation mechanism
induced by the presence of nondiagonal terms of Lorentz violation couplings in
2-flavor space in a 2-spinor formalism by explicitly assuming neutrinos to be
Marjorana fermions. We also obtain a much stringent bound ($\backsim10^{-25}$)
on one of the Lorentz violation parameters by applying MDR to the ultrahigh
energy cosmic ray (UHECR) problem.


title: CN-Cycle Solar Neutrinos and Sun's Primordial Core Metalicity

abstract:
  We argue that it may be possible to exploit neutrinos from the CN cycle and
pp chain to determine the primordial solar core abundances of C and N at an
interesting level of precision. Such a measurement would allow a comparison of
the Sun's deep interior composition with it surface, testing a key assumption
of the standard solar model (SSM), a homogeneous zero-age Sun. It would also
provide a cross-check on recent photospheric abundance determinations that have
altered the once excellent agreement between the SSM and helioseismology. As
further motivation, we discuss a speculative possibility in which photospheric
abundance/helioseismology puzzle is connected with the solar-system metal
differentiation that accompanied formation of the gaseous giant planets.
  The theoretical relationship between core C and N and the 13N and 15O solar
neutrino fluxes can be made more precise (and more general) by making use of
the Super-Kamiokande and SNO 8B neutrino capture rates, which calibrate the
temperature of the solar core. The primordial C and N abundances can then be
obtained from these neutrino fluxes and from a product of nuclear rates, with
little residual solar model dependence. We describe some of the recent
experimental advances that could allow this comparison to be made
(theoretically) at about the 9% level, and note that this uncertainty may be
reduced further due to ongoing work on the S-factor for 14N(p,gamma). The
envisioned measurement might be possible in deep, large-volume detectors using
organic scintillator, e.g., Borexino or SNO+


title:
Equiangular tight frames from complex Seidel matrices containing cube
  roots of unity

abstract:
  We derive easily verifiable conditions which characterize when complex Seidel
matrices containing cube roots of unity have exactly two eigenvalues. The
existence of such matrices is equivalent to the existence of equiangular tight
frames for which the inner product between any two frame vectors is always a
common multiple of the cube roots of unity. We also exhibit a relationship
between these equiangular tight frames, complex Seidel matrices, and highly
regular, directed graphs. We construct examples of such frames with arbitrarily
many vectors.


title: Algorithms and Bounds for Rollout Sampling Approximate Policy Iteration

abstract:
  Several approximate policy iteration schemes without value functions, which
focus on policy representation using classifiers and address policy learning as
a supervised learning problem, have been proposed recently. Finding good
policies with such methods requires not only an appropriate classifier, but
also reliable examples of best actions, covering the state space sufficiently.
Up to this time, little work has been done on appropriate covering schemes and
on methods for reducing the sample complexity of such methods, especially in
continuous state spaces. This paper focuses on the simplest possible covering
scheme (a discretized grid over the state space) and performs a
sample-complexity comparison between the simplest (and previously commonly
used) rollout sampling allocation strategy, which allocates samples equally at
each state under consideration, and an almost as simple method, which allocates
samples only as needed and requires significantly fewer samples.


title: A symmetry property of some harmonic algebraic curves

abstract:
  The aim of this note is to give a surprising symmetry property of some
harmonic algebraic curves: when all the roots $z_i$ of a complex polynomial $P$
lie on the unit circle $\U$, the points of $\U$ different from the $z_i$, and
such that $\Arg(P(z))=\theta$, form a regular $n$-gon, where $n$ is the degree
of $P$.


title: Quantum mechanics and umbral calculus

abstract:
  In this paper we present the first steps for obtaining a discrete Quantum
Mechanics making use of the Umbral Calculus. The idea is to discretize the
continuous Schroedinger equation substituting the continuous derivatives by
discrete ones and the space-time continuous variables by well determined
operators that verify some Umbral Calculus conditions. In this way we assure
that some properties of integrability and symmetries of the continuous equation
are preserved and also the solutions of the continuous case can be recovered
discretized in a simple way. The case of the Schroedinger equation with a
potential depending only in the space variable is discussed.


title: Thick GEM versus thin GEM in two-phase argon avalanche detectors

abstract:
  The performance of thick GEMs (THGEMs) was compared to that of thin GEMs in
two-phase Ar avalanche detectors, in view of their potential application in
coherent neutrino-nucleus scattering, dark-matter search and in other
rare-event experiments. The detectors comprised a 1 cm thick liquid-Ar layer
followed by either a double-THGEM or a triple-GEM multiplier, operated in the
saturated vapor above the liquid phase. Three types of THGEMs were studied:
those made of G10 and Kevlar and that with resistive electrodes (RETHGEM). Only
the G10-made THGEM showed a stable performance in two-phase Ar with gains
reaching 3000. Successful operation of two-phase Ar avalanche detectors with
either thin- or thick-GEM multipliers was demonstrated at low detection
thresholds, of 4 and 20 primary electrons respectively. Compared to the
triple-GEM the double-THGEM multiplier yielded slower anode signals; this
allowed applying a pulse-shape analysis to effectively reject noise signals.
Noise rates of both multipliers were evaluated in two-phase Ar; with detection
thresholds of 20 electrons and applying pulse-shape analysis noise levels as
low as 0.007 Hz per 1 cm2 of active area were reached.


title: A low energy neutrino factory with non-magnetic detectors

abstract:
  We show that a very precise neutrino/anti-neutrino event separation is not
mandatory to cover the physics program of a low energy neutrino factory and
thus non-magnetized detectors like water Cerenkov or liquid Argon detectors can
be used. We point out, that oscillation itself strongly enhances the signal to
noise ratio of a wrong sign muon search, provided there is sufficiently
accurate neutrino energy reconstruction. Further, we argue that apart from a
magnetic field, other means to distinguish neutrino from anti-neutrino events
(at least statistically) can be explored. Combined with the fact that
non-magnetic detectors potentially can be made very big, we show that modest
neutrino/anti-neutrino separations at the level of 50% to 90% are sufficient to
obtain good sensitivity to CP violation and the neutrino mass hierarchy for
$\sin^22\theta_{13}>10^{-3}$. These non-magnetized detectors have a rich
physics program outside the context of a neutrino factory, including topics
like supernova neutrinos and proton decay. Hence, our observation opens the
possibility to use a multi-purpose detector also in a neutrino factory beam.


title: The growth of a C_0-semigroup characterised by its cogenerator

abstract:
  We characterise contractivity, boundedness and polynomial boundedness for a
C_0-semigroup on a Banach space in terms of its cogenerator V (or the Cayley
transform of the generator) or its resolvent. In particular, we extend results
of Gomilko and Brenner, Thomee and show that polynomial boundedness of a
semigroup implies polynomial boundedness of its cogenerator. As is shown by an
example, the result is optimal. For analytic semigroups we show that the
converse holds, i.e., polynomial boundedness of the cogenerators implies
polynomial boundedness of the semigroup.
  In addition, we show by simple examples in (C^2,\|\cdot\|_p), p \neq 2, that
our results on the characterisation of contractivity are sharp. These examples
also show that the famous Foias-Sz.-Nagy theorem on cogenerators of contraction
semigroups on Hilbert spaces fails in (C^2,\|\cdot\|_p) for p\neq 2.


title:
Entanglement and quantum phase transition in the asymmetric Hubbard
  chain: density-matrix renormalization group calculations

abstract:
  We study the ground state quantum phase transition by means of entanglement
in the one-dimensional asymmetric Hubbard model with open boundary condition.
The local entanglement between the middle two sites and the rest of the system,
and the block entanglement between the left and right portions of the system,
are calculated using the density-matrix renormalization group (DMRG) method. We
find that the entanglement shows interesting scaling and singular behavior
around the phase transition line.


title: Isotope shifts of 6s5d $^3$D-states in neutral Barium

abstract:
  Laser spectroscopy of the low lying $^1$P and $^3$D states in atomic barium
has been performed. This work contributes substantially to the development of
an effective laser cooling and trapping for heavy alkaline earth elements and
aims in particular for a better understanding of the atomic wave function of
these systems. Isotope shifts and hyperfine structures are ideal probes for the
wave functions at the position of the nucleus. This is essential input for a
theoretical evaluation of the sensitivity to fundamental symmetry breaking
properties like permanent electric dipole moments. We report the first isotope
shift measurements of the $^3$D$_{1,2}$-$^1$P$_1$ transitions. A deviation of
the King plot from its expected behavior has been observed. Further we have
optically resolved the hyperfine structure of the $^3$D$_{1,2}$ states.


title: The Kinematics of a Globally Propagating Disturbance in the Solar Corona

abstract:
  The kinematics of a globally propagating disturbance (also known as an ``EIT
wave") is discussed using Extreme UltraViolet Imager (EUVI) data Solar
Terrestrial Relations Observatory (STEREO). We show for the first time that an
impulsively generated propagating disturbance has similar kinematics in all
four EUVI passbands (304, 171, 195, and 284 A). In the 304 A passband the
disturbance shows a velocity peak of 238+/-20 kms-1 within ~28 minutes of its
launch, varying in acceleration from 76 ms-2 to -102 ms-2. This passband
contains a strong contribution from a Si XI line (303.32 A) with a peak
formation temperature of ~1.6 MK. The 304 A emission may therefore be coronal
rather than chromospheric in origin. Comparable velocities and accelerations
are found in the coronal 195 A passband, while lower values are found in the
lower cadence 284 A passband. In the higher cadence 171 A passband the velocity
varies significantly, peaking at 475+/-47 kms-1 within ~20 minutes of launch,
with a variation in acceleration from 816 ms-2 to -413 ms-2. The high image
cadence of the 171 A passband (2.5 minutes compared to 10 minutes for the
similar temperature response 195 A passband) is found to have a major effect on
the measured velocity and acceleration of the pulse, which increase by factors
of ~2 and ~10, respectively. This implies that previously measured values
(e.g., using EIT) may have been underestimated. We also note that the
disturbance shows strong reflection from a coronal hole in both the 171 and 195
A passbands. The observations are consistent with an impulsively generated
fast-mode magnetoacoustic wave.


title: Constraints for warped branes

abstract:
  We investigate singular geometries which can be associated with warped branes
in arbitrary dimensions. If the brane tension is allowed to be variable, the
extremum condition for the action requires additional constraints beyond the
solution of the field equations. In a higher dimensional world, such
constraints arise from variations of the metric which are local in the usual
four-dimensional spacetime, without changing the geometry of internal space. As
a consequence, continuous families of singular solutions of the field
equations, with arbitrary integration constants, are generically reduced to a
discrete subset of extrema of the action, similar to regular spaces. As an
example, no static extrema of the action with effective four-dimensional
gravity exist for six-dimensional gravity with a cosmological constant. These
findings explain why the field equations of the reduced four-dimensional theory
are not consistent with arbitrary solutions of the higher dimensional field
equations - consistency requires the additional constraints. The characteristic
solutions for variable tension branes are non-static runaway solutions where
the effective four-dimensional cosmological constant vanishes as time goes to
infinity.


title:
Operators of Harmonic Analysis in Weighted Spaces with Non-standard
  Growth

abstract:
  Last years there was increasing an interest to the so called function spaces
with non-standard growth, known also as variable exponent Lebesgue spaces. For
weighted such spaces on homogeneous spaces, we develop a certain variant of
Rubio de Francia's extrapolation theorem. This extrapolation theorem is applied
to obtain the boundedness in such spaces of various operators of harmonic
analysis, such as maximal and singular operators, potential operators, Fourier
multipliers, dominants of partial sums of trigonometric Fourier series and
others, in weighted Lebesgue spaces with variable exponent. There are also
given their vector-valued analogues.


title: Codings of separable compact subsets of the first Baire class

abstract:
  Let $X$ be a Polish space and $K$ a separable compact subset of the first
Baire class on $X$. For every sequence $\bs$ dense in $\kk$, the descriptive
set-theoretic properties of the set \[ \lbf=\{L\in[\nn]: (f_n)_{n\in L}
\text{is pointwise convergent}\} \] are analyzed. It is shown that if $K$ is
not first countable, then $\lbf$ is $\PB^1_1$-complete. This can also happen
even if $K$ is a pre-metric compactum of degree at most two, in the sense of S.
Todorcevic. However, if $K$ is of degree exactly two, then $\lbf$ is always
Borel. A deep result of G. Debs implies that $\lbf$ contains a Borel cofinal
set and this gives a tree-representation of $\kk$. We show that classical
ordinal assignments of Baire-1 functions are actually $\PB^1_1$-ranks on $\kk$.
We also provide an example of a $\SB^1_1$ Ramsey-null subset $A$ of $[\nn]$ for
which there does not exist a Borel set $B\supseteq A$ such that the difference
$B\setminus A$ is Ramsey-null.


title: Rollout Sampling Approximate Policy Iteration

abstract:
  Several researchers have recently investigated the connection between
reinforcement learning and classification. We are motivated by proposals of
approximate policy iteration schemes without value functions which focus on
policy representation using classifiers and address policy learning as a
supervised learning problem. This paper proposes variants of an improved policy
iteration scheme which addresses the core sampling problem in evaluating a
policy through simulation as a multi-armed bandit machine. The resulting
algorithm offers comparable performance to the previous algorithm achieved,
however, with significantly less computational effort. An order of magnitude
improvement is demonstrated experimentally in two standard reinforcement
learning domains: inverted pendulum and mountain-car.


title:
Weighted Boundedness of the Maximal, Singular and Potential Operators in
  Variable Exponent Spaces

abstract:
  We present a brief survey of recent results on boundedness of some classical
operators within the frameworks of weighted spaces $L^{p(\cdot)}(\varrho)$ with
variable exponent $p(x)$, mainly in the Euclidean setting and dwell on a new
result of the boundedness of the Hardy-Littlewood maximal operator in the space
$L^{p(\cdot)}(X,\varrho)$ over a metric measure space $X$ satisfying the
doubling condition. In the case where $X$ is bounded, the weight function
satisfies a certain version of a general Muckenhoupt-type condition For a
bounded or unbounded $X$ we also consider a class of weights of the form
$\varrho(x)=[1+d(x_0,x)]^{\bt_\infty}\prod_{k=1}^m w_k(d(x,x_k))$, $x_k\in X$,
where the functions $w_k(r)$ have finite upper and lower indices $m(w_k)$ and
$M(w_k)$.
  Some of the results are new even in the case of constant $p$.


title: Sample autocovariances of long-memory time series

abstract:
  We find the asymptotic distribution of the sample autocovariances of
long-memory processes in cases of finite and infinite fourth moment. Depending
on the interplay of assumptions on moments and the intensity of dependence,
there are three types of convergence rates and limit distributions. In
particular, a normal approximation with the standard rate does not always hold
in practically relevant cases.


title:
Critical Behavior of J/psi across the Phase Transition from QCD sum
  rules

abstract:
  We study behavior of J/psi in hot gluonic matter using
  QCD sum rules. Taking into account temperature dependences of the gluon
condensates extracted from lattice thermodynamics for the pure SU(3) system, we
find that the mass and width of J/psi exhibit rapid change across the critical
temperature.


title: On filling families of finite subsets of the Cantor set

abstract:
  Let $\ee>0$ and $\fff$ be a family of finite subsets of the Cantor set
$\ccc$. Following D. H. Fremlin, we say that $\fff$ is $\ee$-filling over
$\ccc$ if $\fff$ is hereditary and for every $F\subseteq\ccc$ finite there
exists $G\subseteq F$ such that $G\in\fff$ and $|G|\geq\ee |F|$. We show that
if $\fff$ is $\ee$-filling over $\ccc$ and $C$-measurable in
$[\ccc]^{<\omega}$, then for every $P\subseteq\ccc$ perfect there exists
$Q\subseteq P$ perfect with $[Q]^{<\omega}\subseteq\fff$. A similar result for
weaker versions of density is also obtained.


title: A classification of separable Rosenthal compacta and its applications

abstract:
  The present work consists of three parts. In the first one we determine the
prototypes of separable Rosenthal compacta and we provide a classification
theorem. The second part concerns an extension of a theorem of S. Todorcevic.
The last one is devoted to applications.


title: On pairs of definable orthogonal families

abstract:
  We introduce the notion of an M-family of infinite subsets of $\nn$ which is
implicitly contained in the work of A. R. D. Mathias. We study the structure of
a pair of orthogonal hereditary families $\aaa$ and $\bbb$, where $\aaa$ is
analytic and $\bbb$ is $C$-measurable and an M-family.


title: A strong boundedness result for separable Rosenthal compacta

abstract:
  It is proved that the class of separable Rosenthal compacta on the Cantor set
having a uniformly bounded dense sequence of continuous functions, is strongly
bounded.


title:
Surface tension of electrolytes: Hydrophilic and hydrophobic ions near
  an interface

abstract:
  We calculate the ion distributions around an interface in fluid mixtures of
highly polar and less polar fluids (water and oil) for two and three ion
species. We take into account the solvation and image interactions between ions
and solvent. We show that hydrophilic and hydrophobic ions tend to undergo a
microphase separation at an interface, giving rise to an enlarged electric
double layer. We also derive a general expression for the surface tension of
electrolyte systems, which contains a negative electrostatic contribution
proportional to the square root of the bulk salt density. The amplitude of this
square-root term is small for hydrophilic ion pairs, but is much increased for
hydrophilic and hydrophobic ion pairs. For three ion species including
hydrophilic and hydrophobic ions, we calculate the ion distributions to explain
those obtained by x-ray reflectivity measurements.


title: Definability under duality

abstract:
  It is shown that if $A$ is an analytic class of separable Banach spaces with
separable dual, then the set $A^*=\{Y:\exists X\in A \text{with} Y\cong X^*\}$
is analytic. The corresponding result for pre-duals is false.


title: Sub-- and super--fidelity as bounds for quantum fidelity

abstract:
  We derive several bounds on fidelity between quantum states. In particular we
show that fidelity is bounded from above by a simple to compute quantity we
call super--fidelity. It is analogous to another quantity called sub--fidelity.
For any two states of a two--dimensional quantum system (N=2) all three
quantities coincide. We demonstrate that sub-- and super--fidelity are concave
functions. We also show that super--fidelity is super--multiplicative while
sub--fidelity is sub--multiplicative and design feasible schemes to measure
these quantities in an experiment. Super--fidelity can be used to define a
distance between quantum states. With respect to this metric the set of quantum
states forms a part of a $N^2-1$ dimensional hypersphere.


title: On antichains of spreading models of Banach spaces

abstract:
  We show that for every separable Banach space $X$, either $\spw(X)$ (the set
of all spreading models of $X$ generated by weakly-null sequences in $X$,
modulo equivalence) is countable, or $\spw(X)$ contains an antichain of the
size of the continuum. This answers a question of S. J. Dilworth, E. Odell and
B. Sari.


title: Nonionic and ionic surfactants at an interface

abstract:
  A Ginzburg-Landau theory is presented on surfactants in polar binary
mixtures, which aggregate at an interface due to the amphiphilic interaction.
They can be ionic surfactants coexisting with counterions. Including the
solvation and image interactions and accounting for a finite volume fraction of
the surfactant, we obtain their distributions and the electric potential around
an interface in equilibrium. The surface tension is also calculated. The
distribution of the adsorbed ionic surfactant is narrower than that of the
counterions. The adsorption is marked for hydrophilic and hydrophobic pairs of
ionic surfactant and counterions.


title: Quantum Accelerator Modes near Higher-Order Resonances

abstract:
  Quantum Accelerator Modes have been experimentally observed, and
theoretically explained, in the dynamics of kicked cold atoms in the presence
of gravity, when the kicking period is close to a half-integer multiple of the
Talbot time. We generalize the theory to the case when the kicking period is
sufficiently close to any rational multiple of the Talbot time, and thus
predict new rich families of experimentally observable Quantum Accelerator
Modes.


title: Limit distributions for the problem of collecting pairs

abstract:
  Let $N_n=\{1,2,...,n\}$. Elements are drawn from the set $N_n$ with
replacement, assuming that each element has probability $1/n$ of being drawn.
We determine the limiting distributions for the waiting time until the given
portion of pairs $jj$, $j\in N_n$, is sampled. Exact distributions of some
related random variables and their characteristics are also obtained.


title: Braid ordering and knot genus

abstract:
  The genus of knots is a one of the fundamental invariant and can be seen as a
complexity of knots. In this paper, we give a lower bound of genus using
Dehornoy floor, which is a measure of complexity of braids in terms of braid
ordering.


title: On classes of Banach spaces admitting "small" universal spaces

abstract:
  We characterize those classes $\ccc$ of separable Banach spaces admitting a
separable universal space $Y$ (that is, a space $Y$ containing, up to
isomorphism, all members of $\ccc$) which is not universal for all separable
Banach spaces. The characterization is a byproduct of the fact, proved in the
paper, that the class $\mathrm{NU}$ of non-universal separable Banach spaces is
strongly bounded. This settles in the affirmative the main conjecture form
\cite{AD}. Our approach is based, among others, on a construction of
$\llll_\infty$-spaces, due to J. Bourgain and G. Pisier. As a consequence we
show that there exists a family $\{Y_\xi:\xi<\omega_1\}$ of separable,
non-universal, $\llll_\infty$-spaces which uniformly exhausts all separable
Banach spaces. A number of other natural classes of separable Banach spaces are
shown to be strongly bounded as well.


title: On the elicitation of continuous, symmetric, unimodal distributions

abstract:
  In this brief note, we highlight some difficulties that can arise when
fitting a continuous, symmetric, unimodal distribution to a set of expert's
judgements. A simple analysis shows it is possible to fit a Cauchy distribution
to an expert's beliefs when their beliefs actually follow a normal
distribution. This example stresses the need for careful distribution fitting
and for feedback to the expert about what the fitted distribution implies about
their beliefs.


title:
Semantic Analysis of Tag Similarity Measures in Collaborative Tagging
  Systems

abstract:
  Social bookmarking systems allow users to organise collections of resources
on the Web in a collaborative fashion. The increasing popularity of these
systems as well as first insights into their emergent semantics have made them
relevant to disciplines like knowledge extraction and ontology learning. The
problem of devising methods to measure the semantic relatedness between tags
and characterizing it semantically is still largely open. Here we analyze three
measures of tag relatedness: tag co-occurrence, cosine similarity of
co-occurrence distributions, and FolkRank, an adaptation of the PageRank
algorithm to folksonomies. Each measure is computed on tags from a large-scale
dataset crawled from the social bookmarking system del.icio.us. To provide a
semantic grounding of our findings, a connection to WordNet (a semantic lexicon
for the English language) is established by mapping tags into synonym sets of
WordNet, and applying there well-known metrics of semantic similarity. Our
results clearly expose different characteristics of the selected measures of
relatedness, making them applicable to different subtasks of knowledge
extraction such as synonym detection or discovery of concept hierarchies.


title: On unconditionally saturated Banach spaces

abstract:
  We prove a structural property of the class of unconditionally saturated
separable Banach spaces. We show, in particular, that for every analytic set
$\aaa$, in the Effros-Borel space of subspaces of $C[0,1]$, of unconditionally
saturated separable Banach spaces, there exists an unconditionally saturated
Banach space $Y$, with a Schauder basis, that contains isomorphic copies of
every space $X$ in the class $\aaa$.


title: On the number of unique expansions in non-integer bases

abstract:
  Let $q > 1$ be a real number and let $m=m(q)$ be the largest integer smaller
than $q$. It is well known that each number $x \in J_q:=[0, \sum_{i=1}^{\infty}
m q^{-i}]$ can be written as $x=\sum_{i=1}^{\infty}{c_i}q^{-i}$ with integer
coefficients $0 \le c_i < q$. If $q$ is a non-integer, then almost every $x \in
J_q$ has continuum many expansions of this form. In this note we consider some
properties of the set $\mathcal{U}_q$ consisting of numbers $x \in J_q$ having
a unique representation of this form. More specifically, we compare the size of
the sets $\mathcal{U}_q$ and $\mathcal{U}_r$ for values $q$ and $r$ satisfying
$1< q < r$ and $m(q)=m(r)$.


title:
Absolute Chow-Kuenneth decomposition for rational homogeneous bundles
  and for log homogeneous varieties

abstract:
  In this paper, we investigate Murre's conjecture on the existence of a
Chow--Kuenneth decomposition for a rational homogeneous bundle $Z\to S$ over a
smooth variety, defined over complex numbers. Chow-K\"unneth decomposition is
exhibited for $Z$ whenever $S$ has a Chow--Kuenneth decomposition. The same
conclusion holds for a class of log homogeneous varieties, studied by M. Brion.


title:
The structures of embedded clusters in the Perseus, Serpens and
  Ophiuchus molecular clouds

abstract:
  The young stellar population data of the Perseus, Ophiuchus and Serpens
molecular clouds are obtained from the Spitzer c2d legacy survey in order to
investigate the spatial structure of embedded clusters using the nearest
neighbour and minimum spanning tree method. We identify the embedded clusters
in these clouds as density enhancements and analyse the clustering parameter Q
with respect to source luminosity and evolutionary stage. This analysis shows
that the older Class 2/3 objects are more centrally condensed than the younger
Class 0/1 protostars, indicating that clusters evolve from an initial
hierarchical configuration to a centrally condensed one. Only IC348 and the
Serpens core, the older clusters in the sample, shows signs of mass segregation
(indicated by the dependence of Q on the source magnitude), pointing to a
significant effect of dynamical interactions after a few Myr. The structure of
a cluster may also be linked to the turbulent energy in the natal cloud as the
most centrally condensed cluster is found in the cloud with the lowest Mach
number and vice versa. In general these results agree well with theoretical
scenarios of star cluster formation by gravoturbulent fragmentation.


title:
A Radial-Dependent Dispersive Finite-Difference Time-Domain Method for
  the Evaluation of Electromagnetic Cloaks

abstract:
  A radial-dependent dispersive finite-difference time-domain (FDTD) method is
proposed to simulate electromagnetic cloaking devices. The Drude dispersion
model is applied to model the electromagnetic characteristics of the cloaking
medium. Both lossless and lossy cloaking materials are examined and their
operating bandwidth is also investigated. It is demonstrated that the perfect
"invisibility" from electromagnetic cloaks is only available for lossless
metamaterials and within an extremely narrow frequency band.