title:
Generation and detection of gravitational waves at microwave frequencies
  by means of a superconducting two-body system

abstract:
  The 2-body system of a superconducting sphere levitated in the magnetic field
generated by a persistent current in a superconducting ring, can possibly
convert gravitational waves into electromagnetic waves, and vice versa.
Faraday's law of induction implies that the time-varying distance between the
sphere and the ring caused by the tidal force of an incident gravitational wave
induces time-varying electrical currents, which are the source of an
electromagnetic wave at the same frequency as the incident gravitational wave.
At sufficiently low temperatures, the internal degrees of freedom of the
superconductors are frozen out because of the superconducting energy gap, and
only external degrees of freedom, which are coupled to the radiation fields,
remain. Hence this wave-conversion process is loss-free and therefore
efficient, and by time-reversal symmetry, so is the reverse process. A
Hertz-like experiment at microwave frequencies should therefore be practical to
perform. This would open up observations of the gravitational-wave analog of
the Cosmic Microwave Background from the extremely early Big Bang, and also
communications directly through the interior of the Earth.


title:
5D Differential Calculus and Noether Analysis of Translation Symmetries
  in kappa-Minkowski Noncommutative Spacetime

abstract:
  We perform a Noether analysis for a description of translation
transformations in 4D kappa-Minkowski noncommutative spacetime which is based
on the structure of a 5D differential calculus. Taking properly into account
the properties of the differential calculus we arrive at an explicit formula
for the conserved charges. We also propose a choice of basis for the 5D
calculus which leads to an intuitive description of time derivatives.


title: Mirror duality and noncommutative tori

abstract:
  In this paper, we study a mirror duality on a generalized complex torus and a
noncommutative complex torus. First, we derive a symplectic version of Riemann
condition using mirror duality on ordinary complex tori. Based on this we will
find a mirror correspondence on generalized complex tori and generalize the
mirror duality on complex tori to the case of noncommutative complex tori.


title: On the symplectic phase space of KdV

abstract:
  We prove that the Birkhoff map $\Om$ for KdV constructed on $H^{-1}_0(\T)$
can be interpolated between $H^{-1}_0(\T)$ and $L^2_0(\T)$. In particular, the
symplectic phase space $H^{1/2}_0(\T)$ can be described in terms of Birkhoff
coordinates. As an application, we characterize the regularity of a potential
$q\in H^{-1}(\T)$ in terms of the decay of the gap lengths of the periodic
spectrum of Hill's operator on the interval $[0,2]$.


title:
Global anisotropy of arrival directions of ultra-high-energy cosmic
  rays: capabilities of space-based detectors

abstract:
  Planned space-based ultra-high-energy cosmic-ray detectors (TUS, JEM-EUSO and
S-EUSO) are best suited for searches of global anisotropies in the distribution
of arrival directions of cosmic-ray particles because they will be able to
observe the full sky with a single instrument. We calculate quantitatively the
strength of anisotropies associated with two models of the origin of the
highest-energy particles: the extragalactic model (sources follow the
distribution of galaxies in the Universe) and the superheavy dark-matter model
(sources follow the distribution of dark matter in the Galactic halo). Based on
the expected exposure of the experiments, we estimate the optimal strategy for
efficient search of these effects.


title:
Log-concavity property of the error probability with application to
  local bounds for wireless communications

abstract:
  A clear understanding the behavior of the error probability (EP) as a
function of signal-to-noise ratio (SNR) and other system parameters is
fundamental for assessing the design of digital wireless communication
systems.We propose an analytical framework based on the log-concavity property
of the EP which we prove for a wide family of multidimensional modulation
formats in the presence of Gaussian disturbances and fading. Based on this
property, we construct a class of local bounds for the EP that improve known
generic bounds in a given region of the SNR and are invertible, as well as
easily tractable for further analysis. This concept is motivated by the fact
that communication systems often operate with performance in a certain region
of interest (ROI) and, thus, it may be advantageous to have tighter bounds
within this region instead of generic bounds valid for all SNRs. We present a
possible application of these local bounds, but their relevance is beyond the
example made in this paper.


title: Traffic of molecular motors: from theory to experiments

abstract:
  Intracellular transport along microtubules or actin filaments, powered by
molecular motors such as kinesins, dyneins or myosins, has been recently
modeled using one-dimensional driven lattice gases. We discuss some
generalizations of these models, that include extended particles and defects.
We investigate the feasibility of single molecule experiments aiming to measure
the average motor density and to locate the position of traffic jams by mean of
a tracer particle. Finally, we comment on preliminary single molecule
experiments performed in living cells.


title: Cognitive Medium Access: Exploration, Exploitation and Competition

abstract:
  This paper establishes the equivalence between cognitive medium access and
the competitive multi-armed bandit problem. First, the scenario in which a
single cognitive user wishes to opportunistically exploit the availability of
empty frequency bands in the spectrum with multiple bands is considered. In
this scenario, the availability probability of each channel is unknown to the
cognitive user a priori. Hence efficient medium access strategies must strike a
balance between exploring the availability of other free channels and
exploiting the opportunities identified thus far. By adopting a Bayesian
approach for this classical bandit problem, the optimal medium access strategy
is derived and its underlying recursive structure is illustrated via examples.
To avoid the prohibitive computational complexity of the optimal strategy, a
low complexity asymptotically optimal strategy is developed. The proposed
strategy does not require any prior statistical knowledge about the traffic
pattern on the different channels. Next, the multi-cognitive user scenario is
considered and low complexity medium access protocols, which strike the optimal
balance between exploration and exploitation in such competitive environments,
are developed. Finally, this formalism is extended to the case in which each
cognitive user is capable of sensing and using multiple channels
simultaneously.


title: Quasi-socle ideals in Gorenstein numerical semigroup rings

abstract:
  Quasi-socle ideals, that is the ideals $I$ of the form $I= Q :
\mathfrak{m}^q$ in Gorenstein numerical semigroup rings over fields are
explored, where $Q$ is a parameter ideal, and $\mathfrak{m}$ is the maximal
ideal in the base local ring, and $q \geq 1$ is an integer. The problems of
when $I$ is integral over $Q$ and of when the associated graded ring
$\mathrm{G}(I) = \bigoplus_{n \geq 0}I^n/I^{n+1}$ of $I$ is Cohen-Macaulay are
studied. The problems are rather wild; examples are given.


title: Quasi-socle ideals in local rings with Gorenstein tangent cones

abstract:
  Quasi-socle ideals, that is the ideals $I$ of the form $I= Q :
\mathfrak{m}^q$ in a Noetherian local ring $(A, \mathfrak{m})$ with the
Gorenstein tangent cone $\mathrm{G}(\mathfrak{m}) = \bigoplus_{n \geq
0}{\mathfrak{m}}^n/{\mathfrak{m}}^{n+1}$ are explored, where $q \geq 1$ is an
integer and $Q$ is a parameter ideal of $A$ generated by monomials of a system
$x_1, x_2, ..., x_d$ of elements in $A$ such that $(x_1, x_2, ..., x_d)$ is a
reduction of $\mathfrak{m}$. The questions of when $I$ is integral over $Q$ and
of when the graded rings $\mathrm{G}(I) = \bigoplus_{n \geq 0}I^n/I^{n+1}$ and
$\mathrm{F}(I) = \bigoplus_{n \ge 0}I^n/\mathfrak{m} I^n$ are Cohen-Macaulay
are answered. Criteria for $\mathrm{G} (I)$ and $\mathcal{R} (I) = \bigoplus_{n
\geq 0}I^n$ to be Gorenstein rings are given.


title: Interference-induced splitting of resonances in spontaneous emission

abstract:
  We study the resonance fluorescence from a coherently driven four-level atom
in the Y-type configuration. The effects of quantum interference induced by
spontaneous emission on the fluorescence properties of the atom are
investigated. It is found that the quantum interference resulting from cascade
emission decays of the atom leads to a splitting of resonances in the excited
level populations calculated as a function of light detuning. For some
parameters, interference assisted enhancement of inner sidebands and narrowing
of central peaks may also occur in the fluorescence spectrum. We present a
physical understandingof our numerical results using the dressed state
description of the atom-light interaction.


title: Comparison of two experiments on radiative neutron decay

abstract:
  Over 10 years ago we proposed an experiment on measuring the characteristics
of radiative neutron decay in papers [1, 2]. At the same time we had published
the theoretical spectrum of radiative gamma quanta, calculated within the
framework of the electroweak interactions, on the basis of which we proposed
the methodology for the future experiment [3,4]. However, because we were
denied beam time on the intensive cold neutron beam at ILL (Grenoble, France)
for a number of years, we could only conduct the experiment in 2005 on the
newly opened FRMII reactor of Technical University of Muenchen. The main result
of this experiment was the discovery of radiative neutron decay and the
measurement of its relative intensity B.R.= (3.2+-1.6)10-3 with C.L.=99.7% for
radiative gamma quanta with energy over 35 kev [5,6]. Over a year after our
first announcement about the results of the conducted experiment, "Nature" [7]
published a letter asserting that its authors have also measured the branching
ratio of radiative neutron decay B.R.= (3.13+-0.34)10-3 with C.L.=68% and gamma
quanta energy from 15 to 340 kev. This article aims to compare these two
experiments. It is shown that the use of strong magnetic fields in the NIST
(Washington, USA) experiment methodology not only prevents any exact
measurement of the branching ratio and identification of radiative neutron
decay events, but also makes registration of ordinary neutron decay events
impossible.


title:
The Stationary Phase Method for a Wave Packet in a Semiconductor Layered
  System. The applicability of the method

abstract:
  Using the formal analysis made by Bohm in his book, {\em "Quantum theory"},
Dover Publications Inc. New York (1979), to calculate approximately the phase
time for a transmitted and the reflected wave packets through a potential
barrier, we calculate the phase time for a semiconductor system formed by
different mesoscopic layers. The transmitted and the reflected wave packets are
analyzed and the applicability of this procedure, based on the stationary phase
of a wave packet, is considered in different conditions. For the applicability
of the stationary phase method an expression is obtained in the case of the
transmitted wave depending only on the derivatives of the phase, up to third
order. This condition indicates whether the parameters of the system allow to
define the wave packet by its leading term. The case of a multiple barrier
systems is shown as an illustration of the results. This formalism includes the
use of the Transfer Matrix to describe the central stratum, whether it is
formed by one layer (the single barrier case), or two barriers and an inner
well (the DBRT system), but one can assume that this stratum can be comprise of
any number or any kind of semiconductor layers.


title:
Integrablility of a Classical $N= 2$ Super Sinh-Gordon Model with Jump
  Defects

abstract:
  The Lagrangian formalism for the N=2 supersymmetric sinh-Gordon model with a
jump defect is considered. The modified conserved momentum and energy are
constructed in terms of border functions. The supersymmetric Backlund
transformation is given and an one-soliton solution is obtained.
  The Lax formulation based on the affine super Lie algebra $sl(2,2)$ within
the space split by the defect leads to the integrability of the model and
henceforth to the existence of an infinite number of constants of motion.


title: Patching over fields

abstract:
  We develop a new form of patching that is both far-reaching and more
elementary than the previous versions that have been used in inverse Galois
theory for function fields of curves. A key point of our approach is to work
with fields and vector spaces, rather than rings and modules. After presenting
a self-contained development of this form of patching, we obtain applications
to other structures such as Brauer groups and differential modules.


title:
A Measurement of Proper Motions of SiO Maser Sources in the Galactic
  Center with the VLBA

abstract:
  We report on the high-precision astrometric observations of maser sources
around the Galactic Center in the SiO J=1--0 v=1 and 2 lines with the VLBA
during 2001 -- 2004. With phase-referencing interferometry referred to the
radio continuum source Sgr A*, accurate positions of masers were obtained for
three detected objects: IRS 10 EE (7 epochs), IRS 15NE (2 epochs), and SiO 6
(only 1 epoch). Because circumstellar masers of these objects were resolved
into several components, proper motions for the maser sources were derived with
several different methods. Combining our VLBA results with those of the
previous VLA observations, we obtained the IRS 10EE proper motion of 76+-3 km
s^{-1} (at 8 kpc) to the south relative to Sgr A*. Almost null proper motion of
this star in the east--west direction results in a net transverse motion of the
infrared reference frame of about 30+-9 km s^{-1} to the west relative to Sgr
A*. The proper-motion data also suggests that IRS 10EE is an astrometric binary
with an unseen massive companion.


title:
Bosonized supersymmetry from the Majorana-Dirac-Staunton theory and
  massive higher-spin fields

abstract:
  We propose a (3+1)D linear set of covariant vector equations, which unify the
spin 0 ``new Dirac equation'' with its spin 1/2 counterpart, proposed by
Staunton. Our equations describe a spin (0,1/2) supermultiplet with different
numbers of degrees of freedom in the bosonic and fermionic sectors. The
translation-invariant spin deegres of freedom are carried by two copies of the
Heisenberg algebra. This allows us to realize space-time supersymmetry in a
bosonized form. The grading structure is provided by an internal reflection
operator. Then the construction is generalized by means of the Majorana
equation to a supersymmetric theory of massive higher-spin particles. The
resulting theory is characterized by a nonlinear symmetry superalgebra, that,
in the large-spin limit, reduces to the super-Poincare algebra with or without
tensorial central charge.


title:
Mapping the Spatial Distribution of Charge Carriers in LaAlO3/SrTiO3
  Heterostructures

abstract:
  At the interface between complex insulating oxides, novel phases with
interesting properties may occur, such as the metallic state reported in the
LaAlO3/SrTiO3 system. While this state has been predicted and reported to be
confined at the interface, some works indicate a much broader spatial
extension, thereby questioning its origin. Here we provide for the first time a
direct determination of the carrier density profile of this system through
resistance profile mappings collected in cross-section LaAlO3/SrTiO3 samples
with a conducting-tip atomic force microscope (CT-AFM). We find that, depending
upon specific growth protocols, the spatial extension of the high-mobility
electron gas can be varied from hundreds of microns into SrTiO3 to a few
nanometers next to the LaAlO3/SrTiO3 interface. Our results emphasize the
potential of CT-AFM as a novel tool to characterize complex oxide interfaces
and provide us with a definitive and conclusive way to reconcile the body of
experimental data in this system.


title:
The isoperimetric profile of a compact Riemannian Manifold for small
  volumes

abstract:
  We show that, the solutions of the isoperimetric problem for small volumes
are $C^{2,\alpha}$-close to small spheres. On the way, we define a class of
submanifolds called pseudo balls, defined by an equation weaker than constancy
of mean curvature. We show that in a neighborhood of each point of a compact
riemannian manifold, there is a unique family concentric pseudo balls which
contains all the pseudo balls $C^{2,\alpha}$-close to small spheres. This
allows us to reduce the isoperimetric problem for small volumes to a
variational problem in finite dimension.


title:
From conformal embeddings to quantum symmetries: an exceptional SU(4)
  example

abstract:
  We briefly discuss several algebraic tools that are used to describe the
quantum symmetries of Boundary Conformal Field Theories on a torus. The
starting point is a fusion category, together with an action on another
category described by a quantum graph. For known examples, the corresponding
modular invariant partition function, which is sometimes associated with a
conformal embedding, provides enough information to recover the whole
structure. We illustrate these notions with the example of the conformal
embedding of SU(4) at level 4 into Spin(15) at level 1, leading to the
exceptional quantum graph E4(SU(4)).


title: Logic of Simultaneity

abstract:
  A logical model of spatiotemporal structures is pictured as a succession of
processes in time. One usual way to formalize time structure is to assume the
global existence of time points and then collect some of them to form time
intervals of processes. Under this set-theoretic approach, the logic that
governs the processes acquires a Boolean structure. However, in a real
distributed system or a relativistic universe where the message-passing time
between different locations is not negligible, the logic has no choice but to
accept time interval instead of time point as a primitive concept. From this
modeling process of spatiotemporal structures, orthologic, the most simplified
version of quantum logic, emerges naturally.


title: Percolation in the Sherrington-Kirkpatrick Spin Glass

abstract:
  We present extended versions and give detailed proofs of results concerning
percolation (using various sets of two-replica bond occupation variables) in
Sherrington-Kirkpatrick spin glasses (with zero external field) that were first
given in an earlier paper by the same authors. We also explain how
ultrametricity is manifested by the densities of large percolating clusters.
Our main theorems concern the connection between these densities and the usual
spin overlap distribution. Their corollaries are that the ordered spin glass
phase is characterized by a unique percolating cluster of maximal density
(normally coexisting with a second cluster of nonzero but lower density). The
proofs involve comparison inequalities between SK multireplica bond occupation
variables and the independent variables of standard Erdos-Renyi random graphs.


title:
A new isotropic cell for studying the thermo-mechanical behavior of
  unsaturated expansive clays

abstract:
  This paper presents a new suction-temperature controlled isotropic cell that
can be used to study the thermo-mechanical behavior of unsaturated expansive
clays. The vapor equilibrium technique is used to control the soil suction; the
temperature of the cell is controlled using a thermostat bath. The isotropic
pressure is applied using a volume/pressure controller that is also used to
monitor the volume change of soil specimen. Preliminary experimental results
showed good performance of the cell.


title:
Analysis of the B --> \pi \ell^+ \ell^- Decay in the Standard Model with
  Fourth Generation

abstract:
  We investigate the influence of the fourth generation quarks on the branching
ratio and the CP-asymmetry in B -->\pi \ell^+ \ell^- decay. Taking the
|V_{t'd}V_{t'b}| ~ 0.001 with phase about 10 degree, which is consistent with
the sin2\phi_1 of the CKM and the B_d mixing parameter \Delta m_{B_d}, we
obtain that for both muon and tau channels the branching ratio, the magnitude
of CP-asymmetry and lepton polarization depict strong dependency on the 4th
generation quarks mass and mixing parameters. These results can serve as a good
tool to search for new physics effects, precisely, to search for the fourth
generation quarks($t', b')$ via its indirect manifestations in loop diagrams.


title: Covering an uncountable square by countably many continuous functions

abstract:
  We prove that there exists a countable family of continuous real functions
whose graphs together with their inverses cover an uncountable square, i.e. a
set of the form $X\times X$, where $X$ is an uncountable subset of the real
line. This extends Sierpi\'nski's theorem from 1919, saying that $S\times S$
can be covered by countably many graphs of functions and inverses of functions
if and only if the size of $S$ does not exceed $\aleph_1$. Our result is also
motivated by Shelah's study of planar Borel sets without perfect rectangles.


title: Decays in Quantum Hierarchical Models

abstract:
  We study the dynamics of a simple model for quantum decay, where a single
state is coupled to a set of discrete states, the pseudo continuum, each
coupled to a real continuum of states. We find that for constant matrix
elements between the single state and the pseudo continuum the decay occurs via
one state in a certain region of the parameters, involving the Dicke and
quantum Zeno effects. When the matrix elements are random several cases are
identified. For a pseudo continuum with small bandwidth there are weakly damped
oscillations in the probability to be in the initial single state. For
intermediate bandwidth one finds mesoscopic fluctuations in the probability
with amplitude inversely proportional to the square root of the volume of the
pseudo continuum space. They last for a long time compared to the non-random
case.


title: Performance Comparison of Persistence Frameworks

abstract:
  One of the essential and most complex components in the software development
process is the database. The complexity increases when the "orientation" of the
interacting components differs. A persistence framework moves the program data
in its most natural form to and from a permanent data store, the database. Thus
a persistence framework manages the database and the mapping between the
database and the objects. This paper compares the performance of two
persistence frameworks ? Hibernate and iBatis?s SQLMaps using a banking
database. The performance of both of these tools in single and multi-user
environments are evaluated.


title:
Quiet Sun internetwork magnetic fields from the inversion of Hinode
  measurements

abstract:
  We analyze Fe I 630 nm observations of the quiet Sun at disk center taken
with the spectropolarimeter of the Solar Optical Telescope aboard the Hinode
satellite. A significant fraction of the scanned area, including granules,
turns out to be covered by magnetic fields. We derive field strength and
inclination probability density functions from a Milne-Eddington inversion of
the observed Stokes profiles. They show that the internetwork consists of very
inclined, hG fields. As expected, network areas exhibit a predominance of kG
field concentrations. The high spatial resolution of Hinode's
spectropolarimetric measurements brings to an agreement the results obtained
from the analysis of visible and near-infrared lines.


title: Limits from Weak Gravity Conjecture on Dark Energy Models

abstract:
  The weak gravity conjecture has been proposed as a criterion to distinguish
the landscape from the swampland in string theory. As an application in
cosmology of this conjecture, we use it to impose theoretical constraint on
parameters of two types of dark energy models. Our analysis indicates that the
Chaplygin-gas-type models realized in quintessence field are in the swampland,
whereas the $a$ power-low decay model of the variable cosmological constant can
be viable but the parameters are tightly constrained by the conjecture.


title:
Strong influence of precursor powder on the critical current density of
  Fe-sheathed MgB2 tapes

abstract:
  The effect of the quality of starting powders on the microstructure and
superconducting properties of in-situ processed Fe-sheathed MgB2 tapes has been
investigated. Three different types of commercial atomized spherical magnesium
powder and two different purities of amorphous boron powder were employed. When
using the 10-micrometre magnesium as precursor powders, the Mg reacted with
boron more uniformly and quickly, thus the uniformity of the fabricated MgB2
was improved and the grain size of the MgB2 was decreased, hence significant
critical current density (Jc) enhancements were achieved for MgB2 tapes. Jc at
4.2 K for MgB2 tapes made from the 10 um Mg and high purity boron powders was
at least a factor of ten higher than values measured for MgB2 samples made from
all other starting powders. At 20 K, 5 T, the typical Jc values of the tapes
were over 1.0x10^4 A/cm^2 and were much better than those of tape samples
reported recently.


title:
Exact L_2-small ball asymptotics of Gaussian processes and the spectrum
  of boundary value problems with "non-separated" boundary conditions

abstract:
  We sharpen a classical result on the spectral asymptotics of the boundary
value problems for self-adjoint ordinary differential operator. Using this
result we obtain the exact $L_2$-small ball asymptotics for a new class of zero
mean Gaussian processes. This class includes, in particular, integrated
generalized Slepian process, integrated centered Wiener process and integrated
centered Brownian bridge.


title: Ejecta and progenitor of the low-luminosity Type IIP supernova 2003Z

abstract:
  The origin of low-luminosity Type IIP supernovae is unclear: they have been
proposed to originate either from massive (about 25 Msun) or low-mass (about 9
Msun) stars. We wish to determine parameters of the low-luminosity Type IIP
supernova 2003Z, to estimate a mass-loss rate of the presupernova, and to
recover a progenitor mass. We compute the hydrodynamic models of the supernova
to describe the light curves and the observed expansion velocities. The wind
density of the presupernova is estimated using a thin shell model for the
interaction with circumstellar matter. We estimate an ejecta mass of 14 Msun,
an explosion energy of 2.45x10^50 erg, a presupernova radius of 229 Rsun, and a
radioactive Ni-56 amount of 0.0063 Msun. The upper limit of the wind density
parameter in the presupernova vicinity is 10^13 g/cm, and the mass lost at the
red/yellow supergiant stage is less than 0.6 Msun assuming the constant
mass-loss rate. The estimated progenitor mass is in the range of 14.4-17.4
Msun. The presupernova of SN 2003Z was probably a yellow supergiant at the time
of the explosion. The progenitor mass of SN 2003Z is lower than those of SN
1987A and SN 1999em, normal Type IIP supernovae, but higher than the lower
limit of stars undergoing a core collapse. We propose an observational test
based on the circumstellar interaction to discriminate between the massive
(about 25 Msun) and moderate-mass (about 16 Msun) scenarios.


title: Equivariant representable K-theory

abstract:
  We interpret certain equivariant Kasparov groups as equivariant representable
K-theory groups. We compute these groups via a classifying space and as
K-theory groups of suitable sigma-C*-algebras. We also relate equivariant
vector bundles to these sigma-C*-algebras and provide sufficient conditions for
equivariant vector bundles to generate representable K-theory. Mostly we work
in the generality of locally compact groupoids with Haar system.


title: MOND, dark matter, and conservation of energy

abstract:
  The MOND equation $m \vec a \mu(a) = \vec F$ could be transformed to the
equivalent form $m \vec a = \vec{F'}$, where $\Vec{F'}$ is a transformed force.
Using this transformation we argue that MOND could not avoid introducing dark
matter, and introduces nonconservative terms to the equations of motion.


title: Conjugation-invariant norms on groups of geometric origin

abstract:
  A group is said to be bounded if it has a finite diameter with respect to any
bi-invariant metric. In the present paper we discuss boundedness of various
groups of diffeomorphisms.


title:
Superconductivity in the New Platinum Germanides MPt4Ge12 (M =
  Rare-earth and Alkaline-earth Metals) with Filled Skutterudite Structure

abstract:
  New germanium-platinum compounds with the filled-skutterudite crystal
structure were synthesized. The structure and composition were investigated by
X-ray diffraction and microprobe analysis. Magnetic susceptibility, specific
heat, and electrical resistivity measurements evidence superconductivity in
LaPt4Ge12 and PrPt4Ge12 below 8.3K. The parameters of the normal and
superconducting states were established. Strong coupling and a crystal electric
field singlet groundstate is found for the Pr compound. Electronic structure
calculations show a large density of states at the Fermi level. Similar
behavior with lower T_c was observed for SrPt4Ge12 and BaPt4Ge12.


title: Twisted mass QCD in the charm sector

abstract:
  We present preliminary results for the charm quark mass $m_c$ and the $D$ and
$D_s$ mesons decay constants $f_D$ and $f_{D_s}$ from a lattice QCD calculation
with ${\rm N_f}$ = 2 dynamical fermions. We use the twisted mass fermionic
action defined at maximal twist so that physical quantities are automatically
${\cal O}(a)$ improved. Two lattice spacings are considered. The charm quark
mass has been renormalised in the RI-MOM scheme. After a matching to the $\msb$
scheme, we obtain from the simulation at a fine lattice ($a \sim 0.09$ fm)
$m_c^{\msb}(m_c) = 1.481 \pm 0.022 \pm 0.092$ GeV, $f_D = 205 \pm 13 \pm 17$
MeV, $f_{D_s} = 271 \pm 6 \pm 6$ MeV and from the simulation at the finer
lattice ($a \sim 0.07$ fm) $m_c^{\msb}(m_c) = 1.474 \pm 0.041 \pm 0.132$ GeV,
$f_D = 230 \pm 31 \pm 8$ MeV and $f_{D_s} = 264 \pm 5 \pm 8$ MeV. We chose
three renormalisation conditions to determine $m_c$: the spread between the
final results contributes to the systematic error. At both lattice spacings,
particularly at the finer one, the error on $m_c$ is dominated by present
uncertainty on the renormalisation constant $Z_P$, which should be reduced
before performing a reliable continuum limit.


title: Quantum invariants and free Z_{p^2} -actions on 3-manifolds

abstract:
  We give a congruence for the quantum invariant of a Z_p-quotient of a
3$-manifold with a Z_{p^2} action. We show the congruence does not hold for
quotients of 3--manifolds with a Z_{5}xZ_{5} action.


title:
Universal pulse sequence to minimize spin dephasing in the central spin
  decoherence problem

abstract:
  We present a remarkable finding that a recently discovered [G. S. Uhrig,
Phys. Rev. Lett. 98, 100504 (2007)] series of pulse sequences, designed to
optimally restore coherence to a qubit in the spin-boson model of decoherence,
is in fact completely model-independent and generically valid for arbitrary
dephasing Hamiltonians given sufficiently short delay times between pulses. The
series maximizes qubit fidelity versus number of applied pulses for
sufficiently short delay times because the series, with each additional pulse,
cancels successive orders of a time expansion for the fidelity decay. The
"magical" universality of this property, which was not appreciated earlier,
requires that a linearly growing set of "unknowns" (the delay times) must
simultaneously satisfy an exponentially growing set of nonlinear equations that
involve arbitrary dephasing Hamiltonian operators.


title: Rotation of C60 in a single-molecule contact

abstract:
  The orientation of individual C60 molecules adsorbed on Cu(100) is reversibly
switched when the tip of a scanning tunneling microscope is approached to
contact the molecule. The probability of switching rises sharply upon
displacing the tip beyond a threshold. A mechanical mechanism is suggested to
induce the rotation of the molecule.


title: Non-Archimedean Ergodic Theory and Pseudorandom Generators

abstract:
  The paper develops techniques in order to construct computer programs,
pseudorandom number generators (PRNG), that produce uniformly distributed
sequences. The paper exploits an approach that treats standard processor
instructions (arithmetic and bitwise logical ones) as continuous functions on
the space of 2-adic integers. Within this approach, a PRNG is considered as a
dynamical system and is studied by means of the non-Archimedean ergodic theory.


title: Gelfand-Kirillov conjecture for symplectic reflection algebras

abstract:
  We construct functorially a class of algebras using the formalism of double
derivations. These algebras extend to higher dimensions Crawley-Boevey and
Holland's construction of deformed preprojective algebras and encompass
symplectic reflection algebras associated to wreath products. We use this
construction to show that the quotient field of a symplectic reflection algebra
is "rational", confirming a pair of conjectures of Etingof and Ginzburg.


title: ESO540-032: a Transition-Type Dwarf in the Sculptor Group

abstract:
  A color-magnitude diagram (CMD) based on HST/ACS data is presented for the
Sculptor group dwarf galaxy ESO540-032. The CMD is dominated by an old red
giant population but there is a small population of blue stars confined to the
central regions of the galaxy as orginally noted by Jerjen and Rejkuba from
ground-based data. From the luminosity of the red giant branch tip the distance
is determined as 3.7 +/- 0.2 Mpc consistent with previous estimates. The mean
metallicity is estimated as [Fe/H] = -1.7 +/- 0.2 from the color of the red
giant branch. Isochrone fits indicate an age for the blue star population of
~100 Myr, perhaps less. New HI observations with the Australian Telescope
Compact Array confirm that the dwarf contains approximately 10^6 solar masses
of HI, centered on the optical image. The HI mass to blue luminosity ratio is
0.15, comparable to the Phoenix dwarf in the Local Group. These properties
clearly confirm ESO540-032 as a transition-type dwarf in the Sculptor group.


title: Stochastic Simulations of the Repressilator Circuit

abstract:
  The genetic repressilator circuit consists of three transcription factors, or
repressors, which negatively regulate each other in a cyclic manner. This
circuit was synthetically constructed on plasmids in {\it Escherichia coli} and
was found to exhibit oscillations in the concentrations of the three
repressors. Since the repressors and their binding sites often appear in low
copy numbers, the oscillations are noisy and irregular. Therefore, the
repressilator circuit cannot be fully analyzed using deterministic methods such
as rate-equations. Here we perform stochastic analysis of the repressilator
circuit using the master equation and Monte Carlo simulations. It is found that
fluctuations modify the range of conditions in which oscillations appear as
well as their amplitude and period, compared to the deterministic equations.
The deterministic and stochastic approaches coincide only in the limit in which
all the relevant components, including free proteins, plasmids and bound
proteins, appear in high copy numbers. We also find that subtle features such
as cooperative binding and bound-repressor degradation strongly affect the
existence and properties of the oscillations.


title: Charm and bottom heavy baryon mass spectrum from lattice QCD with 2+1

abstract:
  We present results for the mass spectrum of charm and bottom heavy baryons,
using MILC coarse lattice configurations with 2+1 flavors. Clover heavy quark
propagators with the Fermilab interpretation and improved staggered light quark
propagators are used to construct two point functions with local operators for
different flavor and spin states.


title:
Duffin-Kemmer-Petiau formalism reexamined: non-relativistic
  approximation for spin 0 and spin 1 particles in a Riemannian space-time

abstract:
  It is shown that the generally covariant Duffin-Kemmer-Petiau equation,
formulated in the frame of the Tetrode-Weyl-Fock-Ivanenko tetrad formalism,
allows for a non-relativistic approximation if the metric tensor is of a
special form. The Pauli equation for a vector particle involves the Riemann
curvature tensor explicitly. In analogous way, the procedure of the
non-relativistic approximation in the theory of scalar particle, charged and
neutral, is investigated in the background of Riemannian space-time. A
generalized covariant Schrodinger equation is derived when taking into account
non-minimal interaction term through scalar curvature R(x), it substantially
differs from the conventional generally covariant Schrodinger equation produced
when R(x)=0. It is demonstrated that the the non-relativistic wave function is
always complex-valued irrespective of the type of relativistic scalar particle,
charged or neutral, taken initially. The theory of vector particle proves the
same property: even if the wave function of the relativistic particle of spin 1
is taken real,the corresponding wave function in the non-relativistic
approximation is complex-valued.


title: The gluon propagator from large asymmetric lattices

abstract:
  The Landau-gauge gluon propagator is computed for the SU(3) gauge theory on
lattices up to a size of $32^3 \times 200$. We use the standard Wilson action
at $\beta = 6.0$ and compare our results with previous computations using large
asymmetric and symmetric lattices. In particular, we focus on the impact of the
lattice geometry and momentum cuts to achieve compatibility between data from
symmetric and asymmetric lattices for a large range of momenta.


title:
Classification of 1st order symplectic spinor operators over contact
  projective geometries

abstract:
  We give a classification of $1^{st}$ order invariant differential operators
acting between sections of certain bundles associated to Cartan geometries of
the so called metaplectic contact projective type. These bundles are associated
via representations, which are derived from the so called higher symplectic,
harmonic or generalized Kostant spinor modules. Higher symplectic spinor
modules are arising from the Segal-Shale-Weil representation of the metaplectic
group by tensoring it by finite dimensional modules. We show that for all pairs
of the considered bundles, there is at most one $1^{st}$ order invariant
differential operator up to a complex multiple and give an equivalence
condition for the existence of such an operator. Contact projective analogues
of the well known Dirac, twistor and Rarita-Schwinger operators appearing in
Riemannian geometry are special examples of these operators.


title: Automorphisms of non-spherical buildings have unbounded displacement

abstract:
  If f is a nontrivial automorphism of a thick building Delta of purely
infinite type, we prove that there is no bound on the distance that f moves a
chamber. This has the following group-theoretic consequence: If G is a group of
automorphisms of Delta with bounded quotient, then the center of G is trivial.


title:
Testing the correctness of the Poynting vector \vec E\times\vec B as the
  momentum density of gauge fields

abstract:
  Following our recent finding that the renowned formula $\vec x\times (\vec
E\times\vec B)$ is not the correct density for the electromagnetic angular
momentum, here we examine the validity of the Poynting vector $\vec E
\times\vec B$ as the electromagnetic momentum density (or energy flux). The
competitor is the gauge-invariant canonical momentum $E^i\vec \nabla
A^i_\perp$. It often gives the same result as $\vec E\times\vec B$, but we
propose that a delicate measurement (of the {\em azimuthal} energy flow in
polarized atomic radiations) can make a discrimination. By clarifying the
profound difference between two kinds of energy-momentum tensors: the canonical
(or mechanical) one and the symmetric (or gravitational) one, we predict that
it is $E^i\vec \nabla A^i_\perp$ that would pass the delicate experimental
test. Our observations have far-reaching implications for understanding the
source of gravity, and the nucleon momentum as well.


title:
Investigating rare diffusion events in silicon by
  temperature-accelerated tight-binding molecular dynamics

abstract: withdrawn by author


title: The bound on viscosity and the generalized second law of thermodynamics

abstract:
  We describe a new paradox for ideal fluids. It arises in the accretion of an
\textit{ideal} fluid onto a black hole, where, under suitable boundary
conditions, the flow can violate the generalized second law of thermodynamics.
The paradox indicates that there is in fact a lower bound to the correlation
length of any \textit{real} fluid, the value of which is determined by the
thermodynamic properties of that fluid. We observe that the universal bound on
entropy, itself suggested by the generalized second law, puts a lower bound on
the correlation length of any fluid in terms of its specific entropy. With the
help of a new, efficient estimate for the viscosity of liquids, we argue that
this also means that viscosity is bounded from below in a way reminiscent of
the conjectured Kovtun-Son-Starinets lower bound on the ratio of viscosity to
entropy density. We conclude that much light may be shed on the
Kovtun-Son-Starinets bound by suitable arguments based on the generalized
second law.


title: Analysis of Hamiltonian formulations of linearized General Relativity

abstract:
  The different forms of the Hamiltonian formulations of linearized General
Relativity/spin-two theories are discussed in order to show their similarities
and differences. It is demonstrated that in the linear model, non-covariant
modifications to the initial covariant Lagrangian (similar to those
modifications used in full gravity) are in fact unnecessary. The Hamiltonians
and the constraints are different in these two formulations but the structure
of the constraint algebra and the gauge invariance derived from it are the
same. It is shown that these equivalent Hamiltonian formulations are related to
each other by a canonical transformation which is explicitly given. The
relevance of these results to the full theory of General Relativity is briefly
discussed.


title:
High-resolution polarimetry of Parsamian 21: revealing the structure of
  an edge-on FU Ori disc

abstract:
  We present the first high spatial resolution near-infrared direct and
polarimetric observations of Parsamian 21, obtained with the VLT/NACO
instrument. We complemented these measurements with archival infrared
observations, such as HST/WFPC2 imaging, HST/NICMOS polarimetry, Spitzer IRAC
and MIPS photometry, Spitzer IRS spectroscopy as well as ISO photometry. Our
main conclusions are the following: (1) we argue that Parsamian 21 is probably
an FU Orionis-type object; (2) Parsamian 21 is not associated with any rich
cluster of young stars; (3) our measurements reveal a circumstellar envelope, a
polar cavity and an edge-on disc; the disc seems to be geometrically flat and
extends from approximately 48 to 360 AU from the star; (4) the SED can be
reproduced with a simple model of a circumstellar disc and an envelope; (5)
within the framework of an evolutionary sequence of FUors proposed by Green et
al. (2006) and Quanz et al. (2007), Parsamian 21 can be classified as an
intermediate-aged object.


title: Pareto law of the expenditure of a person in convenience stores

abstract:
  We study the statistical laws of the expenditure of a person in convenience
stores by analysing around 100 million receipts. The density function of
expenditure exhibits a fat tail that follows a power law. We observe the Pareto
principle where both the top 25% and 2% of the customers account for 80% and
25% of the store's sales, respectively. Using the Lorenz curve, the Gini
coefficient is estimated to be 0.70; this implies a strong economic inequality.


title:
The Ly<alpha> and Ly<beta> profiles in solar prominences and prominence
  fine structure

abstract:
  We present the first combined Ly<alpha> and Ly<beta> profiles in solar
prominences obtained by the SOHO/SUMER instrument and discuss their important
spatial variability with respect to predictions from 1D and multithread models.


title:
Estimation Prospects of the Source Number Density of Ultra-high-energy
  Cosmic Rays

abstract:
  We discuss the possibility of accurately estimating the source number density
of ultra-high-energy cosmic rays (UHECRs) using small-scale anisotropy in their
arrival distribution. The arrival distribution has information on their source
and source distribution. We calculate the propagation of UHE protons in a
structured extragalactic magnetic field (EGMF) and simulate their arrival
distribution at the Earth using our previously developed method. The source
number density that can best reproduce observational results by Akeno Giant Air
Shower Array is estimated at about $10^{-5} {\rm Mpc}^{-3}$ in a simple source
model. Despite having large uncertainties of about one order of magnitude, due
to small number of observed events in current status, we find that more
detection of UHECRs in the Auger era can sufficiently decrease this so that the
source number density can be more robustly estimated. 200 event observation
above $4 \times 10^{19} {\rm eV}$ in a hemisphere can discriminate between
$10^{-5}$ and $10^{-6} {\rm Mpc}^{-3}$. Number of events to discriminate
between $10^{-4}$ and $10^{-5} {\rm Mpc}^{-3}$ is dependent on EGMF strength.
We also discuss the same in another source model in this paper.


title: Faster Least Squares Approximation

abstract:
  Least squares approximation is a technique to find an approximate solution to
a system of linear equations that has no exact solution. In a typical setting,
one lets $n$ be the number of constraints and $d$ be the number of variables,
with $n \gg d$. Then, existing exact methods find a solution vector in
$O(nd^2)$ time. We present two randomized algorithms that provide very accurate
relative-error approximations to the optimal value and the solution vector of a
least squares approximation problem more rapidly than existing exact
algorithms. Both of our algorithms preprocess the data with the Randomized
Hadamard Transform. One then uniformly randomly samples constraints and solves
the smaller problem on those constraints, and the other performs a sparse
random projection and solves the smaller problem on those projected
coordinates. In both cases, solving the smaller problem provides relative-error
approximations, and, if $n$ is sufficiently larger than $d$, the approximate
solution can be computed in $O(nd \log d)$ time.


title: Polish grid infrastructure for science and research

abstract:
  Structure, functionality, parameters and organization of the computing Grid
in Poland is described, mainly from the perspective of high-energy particle
physics community, currently its largest consumer and developer. It represents
distributed Tier-2 in the worldwide Grid infrastructure. It also provides
services and resources for data-intensive applications in other sciences.


title: Perturbative matching of heavy-light currents at one-loop

abstract:
  We present results of a perturbative matching calculation performed at
one-loop for heavy-light currents. We use the Fermilab action for the heavy
quarks, the Asqtad action for the light quarks, and an improved gluon action.
We also present results for heavy-heavy currents with Fermilab heavy quarks and
improved glue.


title:
The accuracy of merging approximation in generalized St. Petersburg
  games

abstract:
  Merging asymptotic expansions of arbitrary length are established for the
distribution functions and for the probabilities of suitably centered and
normalized cumulative winnings in a full sequence of generalized St. Petersburg
games, extending the short expansions due to Cs\"org\H{o}, S., Merging
asymptotic expansions in generalized St. Petersburg games, \textit{Acta Sci.
Math. (Szeged)} \textbf{73} 297--331, 2007. These expansions are given in terms
of suitably chosen members from the classes of subsequential semistable
infinitely divisible asymptotic distribution functions and certain derivatives
of these functions. The length of the expansion depends upon the tail
parameter. Both uniform and nonuniform bounds are presented.


title:
Trading activity as driven Poisson process: comparison with empirical
  data

abstract:
  We propose the point process model as the Poissonian-like stochastic sequence
with slowly diffusing mean rate and adjust the parameters of the model to the
empirical data of trading activity for 26 stocks traded on NYSE. The proposed
scaled stochastic differential equation provides the universal description of
the trading activities with the same parameters applicable for all stocks.


title: The UV spectrum of the Galactic bulge

abstract:
  The UV excess shown by elliptical galaxies in their spectra is believed to be
caused by evolved low-mass stars, in particular sdB stars. The stellar system
most similar to the ellipticals for age and metallicity, in which it is
possible to resolve these stars, is the bulge of our Galaxy. sdB star
candidates were observed in the color magnitude diagram of a bulge region by
Zoccali et al. (2003). The follow-up spectroscopic analysis of these stars
confirmed that most of these stars are bulge sdBs, while some candidates turned
out to be disk sdBs or cool stars. Both spectroscopic and photometric data and
a spectral library are used to construct the integrated spectrum of the
observed bulge region from the UV to the optical: the stars in the color
magnitude diagram are associated to the library spectra, on the basis of their
evolutionary status and temperature. The total integrated spectrum is obtained
as the sum of the spectra associated to the color magnitude diagram.
  The comparison of the obtained integrated spectrum with old single stellar
population synthetic spectra calculated by Bruzual & Charlot (2003) agrees with
age and metallicity of the bulge found by previous work. The bulge integrated
spectrum shows only a very weak UV excess, but a too strict selection of the
sample of the sdB star candidates in the color magnitude diagram and the
exclusion of post-Asymptotic Giant Branch stars could have influenced the
result.


title: SUSY R parity violation and CP asymmetry in semi-leptonic tau-decays

abstract:
  We analyze the CP violation in the semileptonic | \Delta S|=1 tau-decays in
supersymmetric extensions of the standard model (SM) with R parity violating
term. We show that the CP asymmetry of tau-decay is enhanced significantly and
the current experimental limits obtained by CLEO collaborations can be easily
accommodated. We argue that observing CP violation in semi leptonic tau-decay
would be a clear evidence for R-parity violating SUSY extension of the SM.


title:
Coherence properties of photons emitted by single defect centers in
  diamond

abstract:
  Photon interference among distant quantum emitters is a promising method to
generate large scale quantum networks. Interference is best achieved when
photons show long coherence times. For the nitrogen-vacancy defect center in
diamond we measure the coherence times of photons via optically induced Rabi
oscillations. Experiments reveal a close to Fourier transform (i.e. lifetime)
limited width of photons emitted even when averaged over minutes. The projected
contrast of two-photon interference (0.8) is high enough to envisage the
applications in quantum information processing. We report 12 and 7.8 ns excited
state lifetime depending on the spin state of the defect.


title: Variations on themes of Kostant

abstract:
  Let g be a complex semisimple Lie algebra and let G' be the Langlands dual
group. We give a description of the cohomology algebra of an arbitrary
spherical Schubert variety in the loop Grassmannian for G' as a quotient of the
form Sym(g^e)/J. Here, J is an appropriate ideal in the symmetric algebra of
g^e, the centralizer of a principal nilpotent in g.
  We also discuss a `topological' proof of Kostant's famous result on the
structure of the polynomial algebra on g.


title: Detecting Life-bearing Extra-solar Planets with Space Telescopes

abstract:
  One of the promising methods to search for life on extra-solar planets
(exoplanets) is to detect life's signatures in their atmospheres. Spectra of
exoplanet atmospheres at the modest resolution needed to search for oxygen,
carbon dioxide, water, and methane will demand large collecting areas and large
diameters to capture and isolate the light from planets in the habitable zones
around the stars. For telescopes using coronagraphs to isolate the light from
the planet, each doubling of telescope diameter will increase the available
sample of stars by an order of magnitude, indicating a high scientific return
if the technical difficulties of constructing very large space telescopes can
be overcome. For telescopes detecting atmospheric signatures of transiting
planets, the sample size increases only linearly with diameter, and the
available samples are probably too small to guarantee detection of life-bearing
planets. Using samples of nearby stars suitable for exoplanet searches, this
paper shows that the demands of searching for life with either technique will
require large telescopes, with diameters of order 10m or larger in space.


title: String topology prospectra and Hochschild cohomology

abstract:
  We study string topology for classifying spaces of connected compact Lie
groups, drawing connections with Hochschild cohomology and equivariant homotopy
theory. First, for a compact Lie group $G$, we show that the string topology
prospectrum $LBG^{-TBG}$ is equivalent to the homotopy fixed-point prospectrum
for the conjugation action of $G$ on itself, $G^{hG}$. Dually, we identify
$LBG^{-ad}$ with the homotopy orbit spectrum $(DG)_{hG}$, and study ring and
co-ring structures on these spectra. Finally, we show that in homology, these
products may be identified with the Gerstenhaber cup product in the Hochschild
cohomology of $C^*(BG)$ and $C_*(G)$, respectively. These, in turn, are
isomorphic via Koszul duality.


title: The quadrupole mechanism of hole spin relaxation

abstract:
  For spin-3/2 holes the anisotropic part of the instantaneous Luttinger
Hamiltonian can be represented as an effective quadrupole coupling. We
investigate the hole spin relaxation process induced by nonadiabatic
fluctuations of this interaction. The obtained analytical solution of the
stochastic Liouville equation describes the polarization decay of spin-3/2
holes in all regimes of momentum scattering: from collision-dominated to
ballistic. Our results create the basis for quantitative interpretation of
recent experiments and elucidate the striking difference between the hole spin
relaxation process in bulk crystals and 2D semiconductor nanostructures.


title:
Quantum information processing using nuclear and electron magnetic
  resonance: review and prospects

abstract:
  This paper describes recent progress using nuclear magnetic resonance (NMR)
as a platform for implementing quantum information processing (QIP) tasks. The
basic ideas of NMR QIP are detailed, examining the successes and limitations of
liquid and solid state experiments. Finally, a future direction for
implementing quantum processors is suggested,utilizing both nuclear and
electron spin degrees of freedom.


title: Operational axioms for C*-algebra representation of transformations

abstract:
  It is shown how a C*-algebra representation of the transformations of a
physical system can be derived from two operational postulates: 1) the
existence of dynamically independent systems}; 2) the existence of symmetric
faithful states. Both notions are crucial for the possibility of performing
experiments on the system, in preventing remote instantaneous influences and in
allowing calibration of apparatuses. The case of Quantum Mechanics is
thoroughly analyzed. The possibility that other no-signaling theories admit a
C*-algebra formulation is discussed.


title: Perturbing QCD with external fields

abstract:
  We present some up-to-date results on QCD phase transition in a
chromomagnetic constant background field and in an abelian monopole background
field. Our results indicate that the QCD critical temperature is not modified
by a monopole background field, whilst it is modified by a constant
chromomagnetic field. We improve our earlier estimate of the QCD critical
parameters in a chromomagnetic background field by performing lattice
simulations with weaker fields.


title:
Prospects in the orbital and rotational dynamics of the Moon with the
  advent of sub-centimeter lunar laser ranging

abstract:
  Lunar Laser Ranging (LLR) measurements are crucial for advanced exploration
of the laws of fundamental gravitational physics and geophysics. Current LLR
technology allows us to measure distances to the Moon with a precision
approaching 1 millimeter. As NASA pursues the vision of taking humans back to
the Moon, new, more precise laser ranging applications will be demanded,
including continuous tracking from more sites on Earth, placing new CCR arrays
on the Moon, and possibly installing other devices such as transponders, etc.
Successful achievement of this goal strongly demands further significant
improvement of the theoretical model of the orbital and rotational dynamics of
the Earth-Moon system. This model should inevitably be based on the theory of
general relativity, fully incorporate the relevant geophysical processes, lunar
librations, tides, and should rely upon the most recent standards and
recommendations of the IAU for data analysis. This paper discusses methods and
problems in developing such a mathematical model. The model will take into
account all the classical and relativistic effects in the orbital and
rotational motion of the Moon and Earth at the sub-centimeter level. The new
model will allow us to navigate a spacecraft precisely to a location on the
Moon. It will also greatly improve our understanding of the structure of the
lunar interior and the nature of the physical interaction at the core-mantle
interface layer. The new theory and upcoming millimeter LLR will give us the
means to perform one of the most precise fundamental tests of general
relativity in the solar system.


title: On some properties on bivariate Fibonacci and Lucas polynomials

abstract:
  In this paper we generalize to bivariate polynomials of Fibonacci and Lucas,
properties obtained for Chebyshev polynomials. We prove that the coordinates of
the bivariate polynomials over appropriate basis are families of integers
satisfying remarkable recurrence relations.


title:
The metal-insulator transition and its relation to magnetic structure in
  (LaMnO3)2n/(SrMnO3)n superlattices

abstract:
  Superlattices of (LaMnO3)2n/(SrMnO3)n (n=1 to 5), composed of the insulators
LaMnO3 and SrMnO3, undergo a metal-insulator transition as a function of n,
being metallic for n<=2 and insulating for n>=3. Measurements of transport,
magnetization and polarized neutron reflectivity reveal that the ferromagnetism
is relatively uniform in the metallic state, and is strongly modulated in the
insulating state, being high in LaMnO3 and suppressed in SrMnO3. The modulation
is consistent with a Mott transition driven by the proximity between the
(LaMnO3)/(SrMnO3) interfaces. Disorder localizes states at the Fermi level at
the interfaces for n>=3. We suggest that this disorder is due to magnetic
frustration at the interfaces.


title:
Hadron production in deuteron-gold collisions and nuclear parton
  distributions

abstract:
  We calculate nuclear modification factors $R_{dAu}$, central-to-peripheral
ratios, $R_{CP}$, and pseudorapidity asymmetries $Y_{Asym}$ in deuteron-gold
collisions at $\sqrt{s} = 200$ GeV in the framework of leading-order (LO)
perturbative Quantum Chromodynamics. We use the Eskola-Kolhinen-Salgado (EKS),
the Frankfurt-Guzey-Strikman (FGS) and the Hirai-Kumano-Nagai (HKN) nuclear
parton distribution functions and the Albino-Kramer-Kniehl (AKK) fragmentation
functions in our calculations. Results are compared to experimental data from
the BRAHMS and STAR collaborations.


title:
Constraining Right-Handed Scale Through Kaon Mixing in SUSY Left-Right
  Model

abstract:
  We study flavor-changing neutral current and CP violations in the minimal
supersymmetric left-right model. We calculate the beyond-standard-model
contributions to the neutral kaon mixing $\Delta M_K$ and $\epsilon$, and find
possible to have a numerical cancelation between the contributions from the
right-handed gauge boson and supersymmetric box diagram. With the cancelation,
the right-handed $W$-boson mass scale can be lowered to about 2 TeV, well
within the search limit of LHC.


title: Superrecursive Features of Interactive Computation

abstract:
  Functioning and interaction of distributed devices and concurrent algorithms
are analyzed in the context of the theory of algorithms. Our main concern here
is how and under what conditions algorithmic interactive devices can be more
powerful than the recursive models of computation, such as Turing machines.
Realization of such a higher computing power makes these systems
superrecursive. We find here five sources for superrecursiveness in
interaction. In addition, we prove that when all of these sources are excluded,
the algorithmic interactive system in question is able to perform only
recursive computations. These results provide computer scientists with
necessary and sufficient conditions for achieving superrecursiveness by
algorithmic interactive devices.


title: Classification of the line-soliton solutions of KPII

abstract:
  In the previous papers (notably, Y. Kodama, J. Phys. A 37, 11169-11190
(2004), and G. Biondini and S. Chakravarty, J. Math. Phys. 47 033514 (2006)),
we found a large variety of line-soliton solutions of the
Kadomtsev-Petviashvili II (KPII) equation. The line-soliton solutions are
solitary waves which decay exponentially in $(x,y)$-plane except along certain
rays. In this paper, we show that those solutions are classified by asymptotic
information of the solution as $|y| \to \infty$. Our study then unravels some
interesting relations between the line-soliton classification scheme and
classical results in the theory of permutations.


title:
Effective Coupling Constant in Renormalization Group for the Quantum
  Electrodynamics

abstract:
  Effective coupling constant in quantum electrodynamics is investigated. A
pole appears in the effective coupling constant for the space-like momentum if
it is calculated by perturbation. The pole can be eliminated by the analytic
regularization. For QED the effective coupling constant is written in terms of
the scale parameter, $\Lambda$, having the dimension of mass as in the case of
QCD. $\Lambda$ is determined by comparing with the experimental data. The
calculated result agrees with experiment with $\Lambda\approx 1.64\times
10^{47}$ GeV; it is very large but much smaller than the mass scale of Landau
ghost.


title: Broad-line Balmer Decrements in Blue Active Galactic Nuclei

abstract:
  We have investigated the broad-line Balmer decrements (Halpha/Hbeta) for a
large, homogeneous sample of Seyfert 1 galaxies and QSOs using spectroscopic
data obtained in the Sloan Digital Sky Survey. The sample, drawn from the
Fourth Data Release, comprises 446 low redshift (z < 0.35) active galactic
nuclei (AGN) that have blue optical continua as indicated by the spectral
slopes in order to minimize the effect of dust extinction. We find that (i) the
distribution of the intrinsic broad-line Halpha/Hbeta ratio can be well
described by log-Gaussian, with a peak at Halpha/Hbeta=3.06 and a standard
deviation of about 0.03 dex only; (ii) the Balmer decrement does not correlate
with AGN properties such as luminosity, accretion rate, and continuum slope,
etc.; (iii) on average, the Balmer decrements are found to be only slightly
larger in radio-loud sources (3.37) and sources having double-peaked
emission-line profiles (3.27) compared to the rest of the sample. We therefore
suggest that the broad-line Halpha/Hbeta ratio can be used as a good indicator
for dust extinction in the AGN broad-line region; this is especially true for
radio-quiet AGN with regular emission-line profiles, which constitute the vast
majority of the AGN population.


title: Geometry and complexity of O'Hara's algorithm

abstract:
  In this paper we analyze O'Hara's partition bijection. We present three type
of results. First, we show that O'Hara's bijection can be viewed geometrically
as a certain scissor congruence type result. Second, we obtain a number of new
complexity bounds, proving that O'Hara's bijection is efficient in several
special cases and mildly exponential in general. Finally, we prove that for
identities with finite support, the map of the O'Hara's bijection can be
computed in polynomial time, i.e. much more efficiently than by O'Hara's
construction.


title:
Exact Static Solutions of a Generalized Discrete \phi^4 Model Including
  Short-Periodic Solutions

abstract:
  For a five-parameter discrete $\phi^4$ model, we derive various exact static
solutions, including the staggered ones, in the form of the basic Jacobi
elliptic functions $\sn$, $\cn$, and $\dn$, and also in the form of their
hyperbolic function limits such as kink ($\tanh$) and single-humped pulse
($\sech$) solutions. Such solutions are admitted by the considered model in
seven cases, two of which have been discussed in the literature, and the
remaining five cases are addressed here. We also obtain $\sin$e, staggered
$\sin$e as well as a large number of short-periodic static solutions of the
generalized 5-parameter model. All the Jacobi elliptic, hyperbolic and
trigonometric function solutions (including the staggered ones) are
translationally invariant (TI), i.e., they can be shifted along the lattice by
an arbitrary $x_0$, but among the short-periodic solutions there are both TI
and non-TI solutions. The stability of these solutions is also investigated.
Finally, the constructed Jacobi elliptic function solutions reveal four new
types of cubic nonlinearity with the TI property.


title: A large deviation approach to optimal transport

abstract:
  A probabilistic method for solving the Monge-Kantorovich mass transport
problem on $R^d$ is introduced. A system of empirical measures of independent
particles is built in such a way that it obeys a doubly indexed large deviation
principle with an optimal transport cost as its rate function. As a
consequence, new approximation results for the optimal cost function and the
optimal transport plans are derived. They follow from the Gamma-convergence of
a sequence of normalized relative entropies toward the optimal transport cost.
A wide class of cost functions including the standard power cost functions
$|x-y|^p$ enter this framework.


title: Minimization of entropy functionals

abstract:
  Entropy functionals (i.e. convex integral functionals) and extensions of
these functionals are minimized on convex sets. This paper is aimed at reducing
as much as possible the assumptions on the constraint set. Dual equalities and
characterizations of the minimizers are obtained with weak constraint
qualifications.


title: Convex minimization problems with weak constraint qualifications

abstract:
  One revisits the standard saddle-point method based on conjugate duality for
solving convex minimization problems. Our aim is to reduce or remove
unnecessary topological restrictions on the constraint set. Dual equalities and
characterizations of the minimizers are obtained with weak or without
constraint qualifications. The main idea is to work with intrinsic topologies
which reflect some geometry of the objective function. The abstract results of
this article are applied in other papers to the Monge-Kantorovich optimal
transport problem and the minimization of entropy functionals.


title: Study of Hadron Scattering Using an Asymmetric Box

abstract:
  We propose to study hadron-hadron scattering using lattice QCD in an
asymmetric box which allows one to access more non-degenerate low-momentum
modes for a given volume. The conventional L\"{u}scher's formula applicable in
a symmetric box is modified accordingly. To illustrate the feasibility of this
approach, pion-pion elastic scattering phase shifts in the I=2, J=0 channel are
calculated within quenched approximation using improved gauge and Wilson
fermion actions on anisotropic lattices in an asymmetric box. After the chiral
and continuum extrapolation, we find that our quenched results for the
scattering phase shifts in this channel are consistent with the experimental
data when the three-momentum of the pion is below 300MeV. Agreement is also
found when compared with previous theoretical results from lattice and other
means. Moreover, with the usage of asymmetric volume, we are able to compute
the scattering phases in the low-momentum range (pion three momentum less than
about 350MeV in the center of mass frame) for over a dozen values of the pion
three-momenta, much more than using the conventional symmetric box with
comparable volume.


title: Elasticity of Stiff Biopolymers

abstract:
  We present a statistical mechanical study of stiff polymers, motivated by
experiments on actin filaments and the considerable current interest in polymer
networks. We obtain simple, approximate analytical forms for the
force-extension relations and compare these with numerical treatments. We note
the important role of boundary conditions in determining force-extension
relations. The theoretical predictions presented here can be tested against
single molecule experiments on neurofilaments and cytoskeletal filaments like
actin and microtubules. Our work is motivated by the buckling of the
cytoskeleton of a cell under compression, a phenomenon of interest to biology.


title:
A note on the cone restriction conjecture in the cylindrically symmetric
  case

abstract:
  In this note, we present two arguments showing that the classical
\textit{linear adjoint cone restriction conjecture} holds for the class of
functions supported on the cone and invariant under the spatial rotation in all
dimensions. The first is based on a dyadic restriction estimate, while the
second follows from a strengthening version of the Hausdorff-Young inequality
and the H\"older inequality in the Lorentz spaces.


title: Weight Distributions of Hamming Codes

abstract:
  We derive a recursive formula determing the weight distribution of the
[n=(q^m-1)/(q-1), n-m, 3] Hamming code H(m,q), when (m, q-1)=1. Here q is a
prime power. The proof is based on Moisio's idea of using Pless power moment
identity together with exponential sum techniques.


title: Number of binomial coefficients divided by a fixed power of a prime

abstract:
  We state a general formula for the number of binomial coefficients $n$ choose
$k$ that are divided by a fixed power of a prime $p$, i.e., the number of
binomial coefficients divided by $p^j$ and not divided by $p^{j+1}$.


title: Weight Distributions of Hamming Codes (II)

abstract:
  In a previous paper, we derived a recursive formula determining the weight
distributions of the [n=(q^m-1)/(q-1)] Hamming code H(m,q), when (m,q-1)=1.
Here q is a prime power. We note here that the formula actually holds for any
positive integer m and any prime power q, without the restriction (m, q-1)=1.


title: Asymmetry of near-critical percolation interfaces

abstract:
  We study the possible scaling limits of percolation interfaces in two
dimensions on the triangular lattice. When one lets the percolation parameter
p(N) vary with the size N of the box that one is considering, three
possibilities arise in the large-scale limit. It is known that when p(N) does
not converge to 1/2 fast enough, then the scaling limits are degenerate,
whereas if p(N) - 1 / 2 goes to zero quickly, the scaling limits are SLE(6) as
when p=1/2. We study some properties of the (non-void) intermediate regime
where the large scale behavior is neither SLE(6) nor degenerate. We prove that
in this case, the law of any scaling limit is singular with respect to that of
SLE(6), even if it is still supported on the set of curves with Hausdorff
dimension equal to 7/4.


title:
New determination of the size and bulk density of the binary asteroid 22
  Kalliope from observations of mutual eclipses

abstract:
  In 2007, the M-type binary asteroid 22 Kalliope reached one of its annual
equinoxes. As a consequence, the orbit plane of its small moon, Linus, was
aligned closely to the Sun's line of sight, giving rise to a mutual eclipse
season. A dedicated international campaign of photometric observations, based
on amateur-professional collaboration, was organized and coordinated by the
IMCCE in order to catch several of these events. The set of the compiled
observations is released in this work. We developed a relevant model of these
events, including a topographic shape model of Kalliope refined in the present
work, the orbit solution of Linus as well as the photometric effect of the
shadow of one component falling on the other. By fitting this model to the only
two full recorded events, we derived a new estimation of the equivalent
diameter of Kalliope of 166.2+/-2.8km, 8% smaller than its IRAS diameter. As to
the diameter of Linus, considered as purely spherical, it is estimated to
28+/-2 km. This substantial "shortening" of Kalliope gives a bulk density of
3.35+/-0.33g/cm3, significantly higher than past determinations but more
consistent with its taxonomic type. Some constraints can be inferred on the
composition.


title: Optical Variability of the Radio Source J 1128+5925

abstract:
  Very recently, J 1128+5925 was found to show strong intraday variability at
radio wavelengths and may be a new source with annual modulation of the
timescale of its radio variability. Therefore, its radio variability can be
best explained via interstellar scintillation. Here we present the properties
of its optical variability for the first time after a monitoring program in
2007 May. Our observations indicate that in this period J 1128+5925 only showed
trivial optical variability on internight timescale, and did not show any clear
intranight variability. This behavior is quite different from its strong radio
intraday variability. Either this object was in a quiescent state in optical in
this period, or it is intrinsically not so active in optical as it is in radio
regimes.


title: Integrated properties of mass segregated star clusters

abstract:
  In this contribution we study integrated properties of dynamically segregated
star clusters. The observed core radii of segregated clusters can be 50%
smaller than the ``true'' core radius. In addition, the measured radius in the
red filters is smaller than those measured in blue filters. However, these
difference are small ($\lesssim10%$), making it observationally challenging to
detect mass segregation in extra-galactic clusters based on such a comparison.
Our results follow naturally from the fact that in nearly all filters most of
the light comes from the most massive stars. Therefore, the observed surface
brightness profile is dominated by stars of similar mass, which are centrally
concentrated and have a similar spatial distribution.


title: Strong decays of heavy baryons in Bethe-Salpeter formalism

abstract:
  In this paper we study the properties of diquarks (composed of $u$ and/or $d$
quarks) in the Bethe-Salpeter formalism under the covariant instantaneous
approximation. We calculate their BS wave functions and study their effective
interaction with the pion. Using the effective coupling constant among the
diquarks and the pion, in the heavy quark limit $m_Q\to\infty$, we calculate
the decay widths of $\Sigma_Q^{(*)}$ ($Q=c,b$) in the BS formalism under the
covariant instantaneous approximation and then give predictions of the decay
widths $\Gamma(\Sigma_b^{(*)}\to\Lambda_b+\pi)$.


title: Red-Shift Distribution of Gamma-ray Bursts and Their Progenitors

abstract:
  Gamma ray bursts have been divided into two classes, long-soft gamma ray
burst and short-hard gamma ray burst according to the bimodal distribution in
duration time. Due to the harder spectrum and the lack of afterglows of
short-hard bursts in optical and radio observations, different progenitors for
short-hard bursts and long-soft bursts have been suggested. Based on the X-ray
afterglow observation and the cumulative red-shift distribution of short-hard
bursts, Nakar et al. (2006) found that the progenitors of short-hard bursts are
consistent with old populations, such as mergers of binary neutron stars.
Recently, the existence of two subclasses in long-soft bursts has been
suggested after considering multiple characteristics of gamma-ray bursts,
including fluences and the duration time. In this work, we extended the
analysis of cumulative red-shift distribution to two possible subclasses in
L-GRBs. We found that two possible subclass GRBs show different red-shift
distributions, especially for red-shifts z > 1. Our results indicate that the
accumulative red-shift distribution can be used as a tool to constrain the
progenitor characteristics of possible subclasses in L-GRBs.


title: MACE -- Mach cones in heavy ion collisions

abstract:
  We study the propagation of sound-like perturbations created by a jet moving
with supersonic velocity through the quark-gluon-plasma created in heavy-ion
reactions within the model MACE (MAch Cone Evolution). Predictions for
heavy-ion reactions at RHIC energies (Au+Au-collisions) and for Pb+Pb reactions
at the LHC ($\sqrt s=5.5A$ TeV) are presented and potential observations by the
STAR, PHENIX and ALICE experiments are discussed.


title: Symplectic Connections of Ricci Type and Star Products

abstract:
  In this article we relate the construction of Ricci type symplectic
connections by reduction to the construction of star product by reduction
yielding rather explicit descriptions for the star product on the reduced
space.


title: Angular decorrelations in Mueller-Navelet jets and DIS

abstract:
  We discuss the azimuthal angle decorrelation of Mueller-Navelet jets at
hadron colliders and forward jets in Deep Inelastic Scattering within the BFKL
framework with a NLO kernel. We stress the need of collinear improvements to
obtain good perturbative convergence. We provide estimates of these
decorrelations for large rapidity differences at the Tevatron, LHC and HERA.


title: On superconformal projective hypermultiplets

abstract:
  Building on the five-dimensional constructions in hep-th/0601177, we provide
a unified description of four-dimensional N = 2 superconformal off-shell
multiplets in projective superspace, including a realization in terms of N = 1
superfields. In particular, superconformal polar multiplets are consistently
defined for the first time. We present new 4D N = 2 superconformal sigma-models
described by polar multiplets. Such sigma-models realize general superconformal
couplings in projective superspace, but involve an infinite tale of auxiliary N
= 1 superfields. The auxiliaries should be eliminated by solving infinitely
many algebraic nonlinear equations, and this is a nontrivial technical problem.
We argue that the latter can be avoided by making use of supersymmetry
considerations. All information about the resulting superconformal model (and
hence the associated superconformal cone) is encoded in the so-called canonical
coordinate system for a Kaehler metric, which was introduced by Bochner and
Calabi in the late 1940s.


title:
Density of neutral interstellar hydrogen at the termination shock from
  Ulysses pickup ion observations

abstract:
  By reevaluating a 13-month stretch of Ulysses SWICS H pickup ion measurements
near 5 AU close to the ecliptic right after the previous solar minimum, this
paper presents a determination of the neutral interstellar H density at the
solar wind termination shock and implications for the density and ionization
degree of hydrogen in the LIC. The density of neutral interstellar hydrogen at
the termination shock was determined from the local pickup ion production rate
as obtained close to the cut-off in the distribution function at aphelion of
Ulysses. As shown in an analytical treatment for the upwind axis and through
kinetic modeling of the pickup ion production rate at the observer location,
with variations in the ionization rate, radiation pressure, and the modeling of
the particle behavior, this analysis turns out to be very robust against
uncertainties in these parameters and the modeling. Analysis using current
heliospheric parameters yields the H density at the termination shock equal to
$0.087\pm0.022$ cm$^{-3}$, including observational and modeling uncertainties.


title: What's in a Name?

abstract:
  This paper describes experiments on identifying the language of a single name
in isolation or in a document written in a different language. A new corpus has
been compiled and made available, matching names against languages. This corpus
is used in a series of experiments measuring the performance of general
language models and names-only language models on the language identification
task. Conclusions are drawn from the comparison between using general language
models and names-only language models and between identifying the language of
isolated names and the language of very short document fragments. Future
research directions are outlined.


title: Heap Reference Analysis for Functional Programs

abstract:
  Current garbage collectors leave a lot of garbage uncollected because they
conservatively approximate liveness by reachability from program variables. In
this paper, we describe a sequence of static analyses that takes as input a
program written in a first-order, eager functional programming language, and
finds at each program point the references to objects that are guaranteed not
to be used in the future. Such references are made null by a transformation
pass. If this makes the object unreachable, it can be collected by the garbage
collector. This causes more garbage to be collected, resulting in fewer
collections. Additionally, for those garbage collectors which scavenge live
objects, it makes each collection faster.
  The interesting aspects of our method are both in the identification of the
analyses required to solve the problem and the way they are carried out. We
identify three different analyses -- liveness, sharing and accessibility. In
liveness and sharing analyses, the function definitions are analyzed
independently of the calling context. This is achieved by using a variable to
represent the unknown context of the function being analyzed and setting up
constraints expressing the effect of the function with respect to the variable.
The solution of the constraints is a summary of the function that is
parameterized with respect to a calling context and is used to analyze function
calls. As a result we achieve context sensitivity at call sites without
analyzing the function multiple number of times.


title: The complex of pant decompositions of a surface

abstract:
  We exhibit a set of edges (moves) and 2-cells (relations) making the complex
of pant decompositions on a surface a simply connected complex. Our
construction, unlike the previous ones, keeps the arguments concerning the
structural transformations independent from those deriving from the action of
the mapping class group. The moves and the relations turn out to be supported
in subsurfaces with 3g-3+n=1,2 (where g is the genus and n is the number of
boundary components), illustrating in this way the so called Grothendieck
principle.


title:
The structure and modeling results of the parallel spatial switching
  system

abstract:
  Problems of the switching parallel system designing provided spatial
switching of packets from random time are discussed. Results of modeling of
switching system as systems of mass service are resulted.


title: Quantum toboggans: models exhibiting a multisheeted PT symmetry

abstract:
  A generalization of the concept of PT-symmetric Hamiltonians H=p^2+V(x) is
described. It uses analytic potentials V(x) (with singularities) and a
generalized concept of PT-symmetric asymptotic boundary conditions. Nontrivial
toboggans are defined as integrated along topologically nontrivial paths of
coordinates running over several Riemann sheets of wave functions.


title: Type Ia supernovae as speed sensors at intermediate redshifts

abstract:
  The application of large scale peculiar velocity (LSPV), as a crucial probe
of dark matter, dark energy and gravity, is severely limited by measurement
obstacles. We show that fluctuations in type Ia supernovae (SNe Ia) fluxes
induced by LSPV offer a promising approach to measure LSPV at intermediate
redshifts. In the 3D Fourier space, gravitational lensing, the dominant
systematical error, is well suppressed, localized and can be further corrected
effectively. Advance in SN observations can further significantly reduce shot
noise induced by SN intrinsic fluctuations, which is the dominant statistical
error. Robust mapping on the motion of the dark universe through SNe Ia is thus
feasible to $z\sim 0.5$.


title: Asymptotically isochronous systems

abstract:
  Mechanisms are elucidated underlying the existence of dynamical systems whose
generic solutions approach asymptotically (at large time) isochronous
evolutions: all their dependent variables tend asymptotically to functions
periodic with the same fixed period. We focus on two such mechanisms,
emphasizing their generality and illustrating each of them via a representative
example. The first example belongs to a recently discovered class of integrable
indeed solvable many-body problems. The second example consists of a broad
class of (generally nonintegrable) models obtained by deforming appropriately
the well-known (integrable and isochronous) many-body problem with inverse-cube
two-body forces and a one-body linear ("harmonic oscillator") force.


title:
Flavor Changing Neutral Current Processes in a SO(10) SUSY GUT with
  Family Symmetry

abstract:
  We report on a detailed analysis of a SO(10) SUSY GUT model of Dermisek and
Raby (DR) with a D3 family symmetry. The model is completely specified in terms
of only 24 parameters and is able to successfully describe both quark and
lepton masses and mixings, except for |Vub| that turns out to be too low.
However, a global fit shows that flavor changing (FC) processes like Bs --> mu+
mu-, Bs-mixing, B+ --> tau+ nu, B --> Xs gamma and B --> Xs l+ l- pose a
serious problem to the DR model. The simultaneous description of these FC
processes forces squarks to have masses well above 1 TeV, not appealing on
grounds of naturalness and probably beyond the reach of the LHC.


title: Lepton Flavour Violating Effects on Chargino Production at the ILC

abstract:
  We review the influence of lepton flavour violation (LFV) on the production
processes e+e- -> ~chi+_i ~chi-_j at the International Linear Collider (ILC)
with longitudinal e+ and e- beam polarizations in the framework of the Minimal
Supersymmetric Standard Model (MSSM). The t-channel sneutrino exchange
contribution to the processes e+e- -> ~chi+_i ~chi-_j is modified in the case
of LFV, as the sneutrino mass eigenstates have no definite flavour, and
therefore more than one sneutrino can contribute. This influence can alter the
cross section sigma(e+e- -> ~chi+_1 ~chi-_1) by a factor of 2 or more when
varying the LFV mixing angles, in accordance with the restrictions due to the
current limits on rare lepton decays. Hence, the inclusion of LFV parameters
can be important when deducing the underlying model parameters from measured
observables such as sigma(e+e- -> ~chi+_1 ~chi-_1).


title:
Electrostatic control of quantum dot entanglement induced by coupling to
  external reservoirs

abstract:
  We propose a quantum transport experiment to prepare and measure
charge-entanglement between two electrostatically defined quantum dots.
Coherent population trapping, as realized in cavity quantum electrodynamics,
can be carried out by using a third quantum dot to play the role of the optical
cavity. In our proposal, a pumping which is quantum mechanically
indistinguishable for the quantum dots drives the system into a state with a
high degree of entanglement. The whole effect can be switched on and off by
means of a gate potential allowing both state preparation and entanglement
detection by simply measuring the total current.


title:
Dust, pulsation, chromospheres and their role in driving mass loss from
  red giants in Galactic globular clusters

abstract:
  Context: Mass loss from red giants in old globular clusters affects the
horizontal branch (HB) morphology and post-HB stellar evolution including the
production of ultraviolet-bright stars, dredge up of nucleosynthesis products
and replenishment of the intra-cluster medium. Studies of mass loss in globular
clusters also allows one to investigate the metallicity dependence of the mass
loss from cool, low-mass stars down to very low metallicities.
  Aims: We present an analysis of new VLT/UVES spectra of 47 red giants in the
Galactic globular clusters 47 Tuc (NGC 104), NGC 362, omega Cen (NGC 5139), NGC
6388, M54 (NGC 6715) and M15 (NGC 7078). The spectra cover the wavelength
region 6100-9900A at a resolving power of R = 110,000. Some of these stars are
known to exhibit mid-infrared excess emission indicative of circumstellar dust.
Our aim is to detect signatures of mass loss, identify the mechanism(s)
responsible for such outflows, and measure the mass-loss rates.
  Methods: We determine for each star its effective temperature, luminosity,
radius and escape velocity. We analyse the H-alpha and near-infrared calcium
triplet lines for evidence of outflows, pulsation and chromospheric activity,
and present a simple model for estimating mass-loss rates from the H-alpha line
profile. We compare our results with a variety of other, independent methods.
  Results: We argue that a chromosphere persists in Galactic globular cluster
giants and controls the mass-loss rate to late-K/early-M spectral types, where
pulsation becomes strong enough to drive shock waves at luminosities above the
RGB tip. This transition may be metallicity-dependent. We find mass-loss rates
of ~10^-7 to 10^-5 solar masses per year, largely independent of metallicity.


title: Precise Formulation of Neutrino Oscillation in the Earth

abstract:
  We give a perturbation theory of neutrino oscillation in the Earth. The
perturbation theory is valid for neutrinos with energy $E \gsim 0.5$ GeV. It is
formulated using trajectory dependent average potential. Non-adiabatic
contributions are included as the first order effects in the perturbation
theory. We analyze neutrino oscillation with standard matter effect and with
non-standard matter effect. In a three flavor analysis we show that the
perturbation theory gives a precise description of neutrino conversion in the
Earth. Effect of the Earth matter is substantially simplified in this
formulation.


title: Neutrinos from WIMP annihilations

abstract:
  We make an improved analysis on the flow of neutrinos originating from WIMP
annihilations inside the Sun and the Earth. We treat both neutrino interaction
and oscillation effects in a consistent framework. Our numerical simulations
are performed in an event based setting, which is useful for both theoretical
studies and for creating neutrino telescope Monte Carlos. We find that the flow
of muon-type neutrinos is enhanced or suppressed depending on the dominant WIMP
annihilation channel.


title: Singular Scaling Functions in Clustering Phenomena

abstract:
  We study clustering in a stochastic system of particles sliding down a
fluctuating surface in one and two dimensions. In steady state, the
density-density correlation function is a scaling function of separation and
system size.This scaling function is singular for small argument -- it exhibits
a cusp singularity for particles with mutual exclusion, and a divergence for
noninteracting particles. The steady state is characterized by giant
fluctuations which do not damp down in the thermodynamic limit. The
autocorrelation function is a singular scaling function of time and system
size. The scaling properties are surprisingly similar to those for particles
moving in a quenched disordered environment that results if the surface is
frozen.


title: Limits of dihedral groups

abstract:
  We give a characterization of limits of dihedral groups in the space of
finitely generated marked groups.
  We also describe the topological closure of dihedral groups in the space of
marked groups on a fixed number of generators.


title:
Self-organizing, two-temperature Ising model describing human
  segregation

abstract:
  A two-temperature Ising-Schelling model is introduced and studied for
describing human segregation. The self-organized Ising model with Glauber
kinetics simulated by M\"uller et al. exhibits a phase transition between
segregated and mixed phases mimicking the change of tolerance (local
temperature) of individuals. The effect of external noise is considered here as
a second temperature added to the decision of individuals who consider change
of accommodation. A numerical evidence is presented for a discontinuous phase
transition of the magnetization.


title: Are galaxies with AGN a transition population?

abstract:
  We present the results of an analysis of a well-selected sample of galaxies
with active and inactive galactic nuclei from the Sloan Digital Sky Survey, in
the range 0.01 < z < 0.16. The SDSS galaxy catalogue was split into two classes
of active galaxies, Type~2 AGN and composites, and one set of inactive,
star-forming/passive galaxies. For each active galaxy, two inactive control
galaxies were selected by matching redshift, absolute magnitude, inclination,
and radius. The sample of inactive galaxies naturally divides into a red and a
blue sequence, while the vast majority of AGN hosts occur along the red
sequence. In terms of H-alpha equivalent width, the population of composite
galaxies peaks in the valley between the two modes, suggesting a transition
population. However, this effect is not observed in other properties such as
colour-magnitude space, or colour-concentration plane. Active galaxies are seen
to be generally bulge-dominated systems, but with enhanced H-alpha emission
compared to inactive red-sequence galaxies. AGN and composites also occur in
less dense environments than inactive red-sequence galaxies, implying that the
fuelling of AGN is more restricted in high-density environments. These results
are therefore inconsistent with theories in which AGN host galaxies are a
`transition' population. We also introduce a systematic 3D spectroscopic
imaging survey, to quantify and compare the gaseous and stellar kinematics of a
well-selected, distance-limited sample of up to 20 nearby Seyfert galaxies, and
20 inactive control galaxies with well-matched optical properties. The survey
aims to search for dynamical triggers of nuclear activity and address
outstanding controversies in optical/IR imaging surveys.


title: Diffractive photoproduction of dijets in ep collisions at HERA

abstract:
  Diffractive photoproduction of dijets was measured with the ZEUS detector at
the ep collider HERA using an integrated luminosity of 77.2 pb-1. The
measurements were made in the kinematic range Q^2 < 1 GeV^2, 0.20 < y < 0.85
and x_pom < 0.025, where Q^2 is the photon virtuality, y is the inelasticity
and x_pom is the fraction of the proton momentum taken by the diffractive
exchange. The two jets with the highest transverse energy, E_T^jet, were
required to satisfy E_T^jet > 7.5 and 6.5 GeV, respectively, and to lie in the
pseudorapidity range -1.5 < eta^jet < 1.5. Differential cross sections were
compared to perturbative QCD calculations using available parameterisations of
diffractive parton distributions of the proton.


title: Approximating max-min linear programs with local algorithms

abstract:
  A local algorithm is a distributed algorithm where each node must operate
solely based on the information that was available at system startup within a
constant-size neighbourhood of the node. We study the applicability of local
algorithms to max-min LPs where the objective is to maximise $\min_k \sum_v
c_{kv} x_v$ subject to $\sum_v a_{iv} x_v \le 1$ for each $i$ and $x_v \ge 0$
for each $v$. Here $c_{kv} \ge 0$, $a_{iv} \ge 0$, and the support sets $V_i =
\{v : a_{iv} > 0 \}$, $V_k = \{v : c_{kv}>0 \}$, $I_v = \{i : a_{iv} > 0 \}$
and $K_v = \{k : c_{kv} > 0 \}$ have bounded size. In the distributed setting,
each agent $v$ is responsible for choosing the value of $x_v$, and the
communication network is a hypergraph $\mathcal{H}$ where the sets $V_k$ and
$V_i$ constitute the hyperedges. We present inapproximability results for a
wide range of structural assumptions; for example, even if $|V_i|$ and $|V_k|$
are bounded by some constants larger than 2, there is no local approximation
scheme. To contrast the negative results, we present a local approximation
algorithm which achieves good approximation ratios if we can bound the relative
growth of the vertex neighbourhoods in $\mathcal{H}$.


title:
A 610-MHz survey of the ELAIS-N1 field with the Giant Metrewave Radio
  Telescope - Observations, data analysis and source catalogue

abstract:
  Observations of the ELAIS-N1 field taken at 610 MHz with the Giant Metrewave
Radio Telescope are presented. Nineteen pointings were observed, covering a
total area of 9 square degrees with a resolution of 6" x 5", PA +45 deg. Four
of the pointings were deep observations with an rms of 40 microJy before
primary beam correction, with the remaining fifteen pointings having an rms of
70 microJy. The techniques used for data reduction and production of a
mosaicked image of the region are described, and the final mosaic is presented,
along with a catalogue of 2500 sources detected above 6 sigma. This work
complements the large amount of optical and infrared data already available on
the region. We calculate 610-MHz source counts down to 270 microJy, and find
further evidence for the turnover in differential number counts below 1 mJy,
previously seen at both 610 MHz and 1.4 GHz.


title: Horizons of stability in matrix Hamiltonians

abstract:
  Non-Hermitian Hamiltonians H possess the real (i.e., observable) spectra
inside certain specific domains of parameters D. In general, the determination
of their observability-horizon boundaries is difficult. We list the
pseudo-Hermitian real N by N matrix Hamiltonians for which the prototype
horizons are defined by closed analytic formulae.