title:
Radio loud AGN and the L_X - \sigma relation of galaxy groups and
  clusters

abstract:
  We use the ROSAT All-Sky Survey to study the X-ray properties of a sample of
625 groups and clusters of galaxies selected from the Sloan Digital Sky Survey.
We stack clusters with similar velocity dispersions and investigate whether
their average X-ray luminosities and surface brightness profiles vary with the
radio activity level of their central galaxies. We find that at a given value
of $\sigma$, clusters with a central radio AGN have more concentrated X-ray
surface brightness profiles, larger central galaxy masses, and higher X-ray
luminosities than clusters with radio-quiet central galaxies. The enhancement
in X-ray luminosity is more than a factor of two, is detected with better than
6$\sigma$ significance, and cannot be explained by X-ray emission from the
radio AGN itself. This difference is largely due to a subpopulation of
radio-quiet, high velocity dispersion clusters with low mass central galaxies.
These clusters are underluminous at X-ray wavelengths when compared to
otherwise similar clusters where the central galaxy is radio-loud, more
massive, or both.


title: 4D static solutions with interacting phantom fields

abstract:
  Three static models with two interacting phantom and ghost scalar fields were
considered: a model of a traversable wormhole, a brane-like model and a
spherically symmetric problem. It was shown numerically that regular solutions
exist for all three cases.


title:
Quantum simulation of Fermi-Hubbard models in semiconductor quantum dot
  arrays

abstract:
  We propose a device for studying the Fermi-Hubbard model with long-range
Coulomb interactions using an array of quantum dots defined in a semiconductor
two-dimensional electron gas system. Bands with energies above the lowest
energy band are used to form the Hubbard model, which allows for an
experimentally simpler realization of the device. We find that depending on
average electron density, the system is well described by a one- or two-band
Hubbard model. Our device design enables the control of the ratio of the
Coulomb interaction to the kinetic energy of the electrons independently to the
filling of the quantum dots, such that a large portion of the Hubbard phase
diagram may be probed. Estimates of the Hubbard parameters suggest that a
metal-Mott insulator quantum phase transition and a d-wave superconducting
phase should be observable using current fabrication technologies.


title:
A new approach for scientific data dissemination in developing
  countries: a case of Indonesia

abstract:
  This short paper is intended as an additional progress report to share our
experiences in Indonesia on collecting, integrating and disseminating both
global and local scientific data across the country through the web technology.
Our recent efforts are exerted on improving the local public access to global
scientific data, and on the other hand encouraging the local scientific data to
be more accessible for the global communities. We have maintained
well-connected infrastructure and some web-based information management systems
to realize such objectives. This paper is especially focused on introducing the
ARSIP for mirroring global as well as sharing local scientific data, and the
newly developed Indonesian Scientific Index for integrating local scientific
data through an automated intelligent indexing system.


title: Complexity of the conditional colorability of graphs

abstract:
  For an integer $r>0$, a conditional $(k,r)$-coloring of a graph $G$ is a
proper $k$-coloring of the vertices of $G$ such that every vertex $v$ of degree
$d(v)$ in $G$ is adjacent to vertices with at least $min\{r, d(v)\}$ different
colors. The smallest integer $k$ for which a graph $G$ has a conditional
$(k,r)$-coloring is called the $r$th order conditional chromatic number,
denoted by $\chi_r(G)$. It is easy to see that the conditional coloring is a
generalization of the traditional vertex coloring for which $r=1$. In this
paper, we consider the complexity of the conditional colorings of graphs. The
main result is that the conditional $(3,2)$-colorability is $NP$-complete for
triangle-free graphs with maximum degree at most 3, which is different from the
old result that the traditional 3-colorability is polynomial solvable for
graphs with maximum degree at most 3. This also implies that it is
$NP$-complete to determine if a graph of maximum degree 3 is $(3,2)$- or
$(4,2)$-colorable. Also we have proved that some old complexity results for
traditional colorings still hold for the conditional colorings.


title: Dynamic 3-Coloring of Claw-free Graphs

abstract:
  A {\it dynamic $k$-coloring} of a graph $G$ is a proper $k$-coloring of the
vertices of $G$ such that every vertex of degree at least 2 in $G$ will be
adjacent to vertices with at least 2 different colors. The smallest number $k$
for which a graph $G$ can have a dynamic $k$-coloring is the {\it dynamic
chromatic number}, denoted by $\chi_d(G)$. In this paper, we investigate the
dynamic 3-colorings of claw-free graphs. First, we prove that it is
$NP$-complete to determine if a claw-free graph with maximum degree 3 is
dynamically 3-colorable. Second, by forbidding a kind of subgraphs, we find a
reasonable subclass of claw-free graphs with maximum degree 3, for which the
dynamically 3-colorable problem can be solved in linear time. Third, we give a
linear time algorithm to recognize this subclass of graphs, and a linear time
algorithm to determine whether it is dynamically 3-colorable. We also give a
linear time algorithm to color the graphs in the subclass by 3 colors.


title:
Spontaneous creation of chromomagnetic field and A_0-condensate at high
  temperature on a lattice

abstract:
  In a lattice formulation of SU(2)-gluodynamics, the spontaneous generation of
chromomagnetic fields at high temperature is investigated. A procedure to
determine this phenomenon is developed. By means of the $\chi^2$-analysis of
the data set accumulating $5-10\times 10^6$ Monte Carlo configurations, the
spontaneous creation of the Abelian color magnetic field is indicated. The
common generation of the magnetic field and $A_0$-condensate is also studied.
It is discovered that the field configuration consisting of the magnetized
vacuum and the $A_0$-condensate is stable.


title: Rainbow number of matchings in regular bipartite graphs

abstract:
  Given a graph $G$ and a subgraph $H$ of $G$, let $rb(G,H)$ be the minimum
number $r$ for which any edge-coloring of $G$ with $r$ colors has a rainbow
subgraph $H$. The number $rb(G,H)$ is called the rainbow number of $H$ with
respect to $G$. Denote $mK_2$ a matching of size $m$ and $B_{n,k}$ a
$k$-regular bipartite graph with bipartition $(X,Y)$ such that $|X|=|Y|=n$ and
$k\leq n$. In this paper we give an upper and lower bound for
$rb(B_{n,k},mK_2)$, and show that for given $k$ and $m$, if $n$ is large
enough, $rb(B_{n,k},mK_2)$ can reach the lower bound. We also determine the
rainbow number of matchings in paths and cycles.


title:
On the existence of a rainbow 1-factor in proper coloring of
  K_{rn}^{(r)}

abstract:
  El-Zanati et al proved that for any 1-factorization $\mathcal{F}$ of the
complete uniform hypergraph $\mathcal {G}=K_{rn}^{(r)}$ with $r\geq 2$ and
$n\geq 3$, there is a rainbow 1-factor. We generalize their result and show
that in any proper coloring of the complete uniform hypergraph $\mathcal
{G}=K_{rn}^{(r)}$ with $r\geq 2$ and $n\geq 3$, there is a rainbow 1-factor.


title: Velocity Structure of Jets in Coronal Hole

abstract:
  Velocity structures of jets in a coronal hole have been derived for the first
time. Hinode observations revealed the existence of many bright points in
coronal holes. They are loop-shaped and sometimes associated with coronal jets.
Spectra obtained with the Extreme ultraviolet Imaging Spectrometer (EIS) on
board Hinode are analyzed to infer Doppler velocity of bright loops and jets in
a coronal hole of the north polar region. Elongated jets above bright loops are
found to be blue-shifted by 30 km/s at maximum, while foot points of bright
loops are red-shifted. Blue-shifts detected in coronal jets are interpreted as
upflows produced by magnetic reconnection between emerging flux and the ambient
field in the coronal hole.


title: Partitioning complete graphs by heterochromatic trees

abstract:
  A {\it heterochromatic tree} is an edge-colored tree in which any two edges
have different colors. The {\it heterochromatic tree partition number} of an
$r$-edge-colored graph $G$, denoted by $t_r(G)$, is the minimum positive
integer $p$ such that whenever the edges of the graph $G$ are colored with $r$
colors, the vertices of $G$ can be covered by at most $p$ vertex-disjoint
heterochromatic trees. In this paper we determine the heterochromatic tree
partition number of an $r$-edge-colored complete graph.


title: Granger Causality and Cross Recurrence Plots in Rheochaos

abstract:
  Our stress relaxation measurements on wormlike micelles using a Rheo-SALS
(rheology + small angle light scattering) apparatus allow simultaneous
measurements of the stress and the scattered depolarised intensity. The latter
is sensitive to orientational ordering of the micelles. To determine the
presence of causal influences between the stress and the depolarised intensity
time series, we have used the technique of linear and nonlinear Granger
causality. We find there exists a feedback mechanism between the two time
series and that the orientational order has a stronger causal effect on the
stress than vice versa. We have also studied the phase space dynamics of the
stress and the depolarised intensity time series using the recently developed
technique of cross recurrence plots (CRPs). The presence of diagonal line
structures in the CRPs unambiguously proves that the two time series share
similar phase space dynamics.


title:
Critical Lattice Size Limit for Synchronized Chaotic State in 1-D and
  2-D Diffusively Coupled Map Lattices

abstract:
  We consider diffusively coupled map lattices with $P$ neighbors (where $P$ is
arbitrary) and study the stability of synchronized state. We show that there
exists a critical lattice size beyond which the synchronized state is unstable.
This generalizes earlier results for nearest neighbor coupling. We confirm the
analytical results by performing numerical simulations on coupled map lattices
with logistic map at each node. The above analysis is also extended to
2-dimensional $P$-neighbor diffusively coupled map lattices.


title: Instability of Population III Black Hole Accretion Disks

abstract:
  We investigate the stability of black hole accretion disks in a primordial
environment (POP III disks for short), by solving the vertical structure of
optically thick disks, including convective energy transport, and by employing
a one-zone model for optically thin isothermal disks. Because of the absence of
metals in POP III disks, we find significant differences in stability
associated with ionization between POP III disks and the disks of solar
metallicity. An unstable branch in S-shaped equilibrium curves on the
Mdot-Sigma (mass accretion rate - surface density) plane extends to a larger
surface density compared with the case of disks of solar metallicity. The
resulting equilibrium loci indicate that quasi-periodic oscillations in
luminosity can also be driven in POP III disks, and their maximal luminosity is
typically by an order of magnitude larger than that of the disks of solar
metallicity. Such a strong outburst of POP III disks can be observed by future
huge telescopes, in case that the mass is supplied onto the disks at the Bondi
accretion rates in typical virialized small dark halos.


title:
A Time-Variable X-Ray Echo: Indications of a Past Flare of the
  Galactic-Center Black Hole

abstract:
  A time-variability study of the neutral iron line flux at 6.40keV in the Sgr
B2 region from data of Suzaku and Chandra is presented. The highly ionized iron
line at 6.68keV is due to Galactic Center Diffuse X-rays (GCDX), and is thus
time invariable. By comparing the 6.68keV and 6.40keV line fluxes, we found
that the 6.40keV flux from the SgrB2 complex region is time variable;
particularly the giant molecular cloud M0.66-0.02, known as ``Sgr B2 cloud'' is
highly variable. The variability of the 6.40keV line in intensity and spatial
distribution strongly supports the scenario that the molecular clouds in the
SgrB2 region are X-ray Reflection Nebulae irradiated by the Galactic Center
(GC) black hole Sgr A*.


title:
Generating Function in Quantum Mechanics: An Application to Counting
  Problems

abstract:
  In this paper we present a generating function approach to two counting
problems in elementary quantum mechanics. The first is to find the total ways
of distributing identical particles among different states. The second is to
find the degeneracies of energy levels in a quantum system with multiple
degrees of freedom. Our approach provides an alternative to the methods in
textbooks.


title: Mitigating the effects of measurement noise on Granger causality

abstract:
  Computing Granger causal relations among bivariate experimentally observed
time series has received increasing attention over the past few years. Such
causal relations, if correctly estimated, can yield significant insights into
the dynamical organization of the system being investigated. Since experimental
measurements are inevitably contaminated by noise, it is thus important to
understand the effects of such noise on Granger causality estimation. The first
goal of this paper is to provide an analytical and numerical analysis of this
problem. Specifically, we show that, due to noise contamination, (1) spurious
causality between two measured variables can arise and (2) true causality can
be suppressed. The second goal of the paper is to provide a denoising strategy
to mitigate this problem. Specifically, we propose a denoising algorithm based
on the combined use of the Kalman filter theory and the
Expectation-Maximization (EM) algorithm. Numerical examples are used to
demonstrate the effectiveness of the denoising approach.


title: Lifting of nilpotent contractions

abstract:
  It is proved that that every nilpotent contraction in a quotient C*-algebra
can be lifted to a nilpotent contraction. As a consequence we get that the
universal C*-algebra generated by a nilpotent contraction is projective. This
answers the question posed by T. Loring.


title:
Theoretical fits of the \delta Cephei light, radius and radial velocity
  curves

abstract:
  We present a theoretical investigation of the light, radius and radial
velocity variations of the prototype $\delta$ Cephei. We find that the best fit
model accounts for luminosity and velocity amplitudes with an accuracy better
than $0.8\sigma$, and for the radius amplitude with an accuracy of $1.7\sigma$.
The chemical composition of this model suggests a decrease in both helium (0.26
vs 0.28) and metal (0.01 vs 0.02) content in the solar neighborhood. Moreover,
distance determinations based on the fit of light curves agree at the
$0.8\sigma$ level with the trigonometric parallax measured by the Hubble Space
Telescope (HST). On the other hand, distance determinations based on angular
diameter variations, that are independent of interstellar extinction and of the
$p$-factor value, indicate an increase of the order of 5% in the HST parallax.


title: Dilaton as a Dark Matter Candidate and its Detection

abstract:
  Assuming that the dilaton is the dark matter of the universe, we propose an
experiment to detect the relic dilaton using the electromagnetic resonant
cavity, based on the dilaton-photon conversion in strong electromagnetic
background. We calculate the density of the relic dilaton, and estimate the
dilaton mass for which the dilaton becomes the dark matter of the universe.
With this we calculate the dilaton detection power in the resonant cavity, and
compare it with the axion detection power in similar resonant cavity
experiment.


title:
A new analysis technique to measure the W Production Charge Asymmetry at
  the Tevatron

abstract:
  We propose an analysis technique to directly measure W production charge
asymmetry from W leptonic decay events at the Tevatron and show the feasibility
for new analysis method using Monte Carlo simulations.


title: "Partial" quantum cloning and quantum cloning of the mixed states

abstract:
  We discuss the "partial" quantum cloning of the pure two-partite states, when
the "part" of initial state related to the one qubit is copied only. The same
approach gives the possibility to design the quantum copying machine for the
mixed qubit states.


title:
Filter Out High Frequency Noise in EEG Data Using The Method of Maximum
  Entropy

abstract:
  We propose a maximum entropy (ME) based approach to smooth noise not only in
data but also to noise amplified by second order derivative calculation of the
data especially for electroencephalography (EEG) studies. The approach includes
two steps, applying method of ME to generate a family of filters and minimizing
noise variance after applying these filters on data selects the preferred one
within the family. We examine performance of the ME filter through frequency
and noise variance analysis and compare it with other well known filters
developed in the EEG studies. The results show the ME filters to outperform
others. Although we only demonstrate a filter design especially for second
order derivative of EEG data, these studies still shed an informatic approach
of systematically designing a filter for specific purposes.


title:
Finiteness theorem on Blow-semialgebraic triviality for a family of
  3-dimensional algebraic sets

abstract:
  In this paper we introduce the notion of Blow-semialgebraic triviality
consistent with a compatible filtration for an algebraic family of algebraic
sets, as an equisingularity for real algebraic singularities. Given an
algebraic family of 3-dimensional algebraic sets defined over a nonsingular
algebraic variety, we show that there is a finite subdivision of the parameter
algebraic set into connected Nash manifolds over which the family admits a
Blow-semialgebraic trivialisation consistent with a compatible filtration. We
show a similar result on finiteness also for a Nash family of 3-dimensional
Nash sets through the Artin-Mazur theorem. As a corollary of the arguments in
their proofs, we have a finiteness theorem on semialgebraic types of polynomial
mappings from the 2-dimensional Euclidean space to the p-diemnsional Euclidean
space.


title: A residue criterion for strong holomorphicity

abstract:
  We give a local criterion in terms of a residue current for strong
holomorphicity of a meromorphic function on an arbitrary pure-dimensional
analytic variety. This generalizes a result by A Tsikh for the case of a
reduced complete intersection.


title:
Highly sensitive refractometer with photonic crystal fiber long-period
  grating

abstract:
  We present highly sensitive refractometers based on a long-period grating in
a large mode area PCF. The maximum sensitivity is 1500 nm/RIU at a refractive
index of 1.33, the highest reported for any fiber grating. The minimal
detectable index change is $2\times 10^{-5}$. The high sensitivity is obtained
by infiltrating the sample into the holes of the photonic crystal fiber to give
a strong interaction between the sample and the probing field.


title:
Concurrence and a proper monogamy inequality for arbitrary quantum
  states

abstract:
  We obtain an analytical lower bound of entanglement quantified by concurrence
for arbitrary bipartite quantum states. It is shown that our bound is tight for
some mixed states and is complementary to the previous known lower bounds. On
the other hand, it is known that the entanglement monogamy inequality proposed
by Coffman, Kundu, and Wootters is in general not true for higher dimensional
quantum states. Inducing from the new lower bound of concurrence, we find a
proper form of entanglement monogamy inequality for arbitrary quantum states.


title: X-Ray Observations of the Galactic Center with Suzaku

abstract:
  We report on the diffuse X-ray emissions from the Galactic center (GCDX)
observed with the X-ray Imaging Spectrometer (XIS) on board the Suzaku
satellite. The highly accurate energy calibrations and extremely low background
of the XIS provide many new facts on the GCDX. These are (1) the origin of the
6.7/7.0keV lines is collisional excitation in hot plasma, (2) new SNR and
super-bubble candidates are found, (3) most of the 6.4keV line is fluorescence
by X-rays, and (4) time variability of the 6.4keV line is found from the SgrB2
complex.


title: Maximizing PageRank via outlinks

abstract:
  We analyze linkage strategies for a set I of webpages for which the webmaster
wants to maximize the sum of Google's PageRank scores. The webmaster can only
choose the hyperlinks starting from the webpages of I and has no control on the
hyperlinks from other webpages. We provide an optimal linkage strategy under
some reasonable assumptions.


title: Weighted Sobolev L2 estimates for a class of Fourier integral operators

abstract:
  In this paper we develop elements of the global calculus of Fourier integral
operators in $R^n$ under minimal decay assumptions on phases and amplitudes. We
also establish global weighted Sobolev $L^2$ estimates for a class of Fourier
integral operators that appears in the analysis of global smoothing problems
for dispersive partial differential equations. As an application, we exhibit a
new type of smoothing estimates for hyperbolic equations, where the decay of
data in space is quantitatively translated into the time decay of solutions.


title: Monotone unitary families

abstract:
  A unitary family is a family of unitary operators $U(x)$ acting on a finite
dimensional hermitian vector space, depending analytically on a real parameter
$x$. It is monotone if $\frac1i U'(x)U(x)^{-1}$ is a positive operator for each
$x$. We prove a number of results generalizing standard theorems on the
spectral theory of a single unitary operator $U_0$, which correspond to the
'commutative' case $U(x)=e^{ix}U_0$. Also, for a two-parameter unitary family
-- for which there is no analytic perturbation theory -- we prove an implicit
function type theorem for the spectral data under the assumption that the
family is monotone in one argument.


title: Particle Dark Matter Candidates

abstract:
  I give a short overview on some of the favorite particle Cold Dark Matter
candidates today, focusing on those having detectable interactions: the axion,
the KK-photon in Universal Extra Dimensions, the heavy photon in Little Higgs
and the neutralino in Supersymmetry. The neutralino is still the most popular,
and today is available in different flavours: SUGRA, nuSUGRA, sub-GUT, Mirage
mediation, NMSSM, effective MSSM, scenarios with CP violation. Some of these
scenarios are already at the level of present sensitivities for direct DM
searches.


title:
On the link pattern distribution of quarter-turn symmetric FPL
  configurations

abstract:
  We present new conjectures on the distribution of link patterns for
fully-packed loop (FPL) configurations that are invariant, or almost invariant,
under a quarter turn rotation, extending previous conjectures of Razumov and
Stroganov and of de Gier. We prove a special case, showing that the link
pattern that is conjectured to be the rarest does have the prescribed
probability. As a byproduct, we get a formula for the enumeration of a new
class of quasi-symmetry of plane partitions.


title: Nonlinear mode conversion in monodomain magnetic squares

abstract:
  Modifications of spatial distributions of dynamic magnetization corresponding
to spinwave eigenmodes of magnetic squares subjected to a strong microwave
excitation field have been studied experimentally and theoretically. We show
that an increase of the excitation power leads to a nonlinear generation of
long-wavelength spatial harmonics caused by the nonlinear cross coupling
between the eigenmodes. The analysis of the experimental data shows that this
process is mainly governed by the action of the nonlinear spin-wave damping.
This conclusion is further supported by the numerical calculations based on the
complex Ginzburg-Landau equation phenomenologically taking into account the
nonlinear damping.


title: Trellis Computations

abstract:
  For a certain class of functions, the distribution of the function values can
be calculated in the trellis or a sub-trellis. The forward/backward recursion
known from the BCJR algorithm is generalized to compute the moments of these
distributions. In analogy to the symbol probabilities, by introducing a
constraint at a certain depth in the trellis we obtain symbol moments. These
moments are required for an efficient implementation of the discriminated
belief propagation algorithm in [2], and can furthermore be utilized to compute
conditional entropies in the trellis.
  The moment computation algorithm has the same asymptotic complexity as the
BCJR algorithm. It is applicable to any commutative semi-ring, thus actually
providing a generalization of the Viterbi algorithm.


title:
Direct observation of the high magnetic field effect on the Jahn-Teller
  state in TbVO4

abstract:
  We report the first direct observation of the influence of high magnetic
fields on the Jahn-Teller (JT) transition in TbVO4. Contrary to spectroscopic
and magnetic methods, X-ray diffraction directly measures the JT distortion;
the splitting between the (311)/(131) and (202)/(022) pairs of Bragg
reflections is proportional to the order parameter. Our experimental results
are compared to mean field calculations, taking into account all possible
orientations of the grains relative to the applied field, and qualitative
agreement is obtained.


title:
Two-dimensional topological field theories coupled to four-dimensional
  BF theory

abstract:
  Four dimensional BF theory admits a natural coupling to extended sources
supported on two dimensional surfaces or string world-sheets. Solutions of the
theory are in one to one correspondence with solutions of Einstein equations
with distributional matter (cosmic strings). We study new (topological field)
theories that can be constructed by adding extra degrees of freedom to the two
dimensional world-sheet. We show how two dimensional Yang-Mills degrees of
freedom can be added on the world-sheet, producing in this way, an interactive
(topological) theory of Yang-Mills fields with BF fields in four dimensions. We
also show how a world-sheet tetrad can be naturally added. As in the previous
case the set of solutions of these theories are contained in the set of
solutions of Einstein's equations if one allows distributional matter supported
on two dimensional surfaces. These theories are argued to be exactly
quantizable. In the context of quantum gravity, one important motivation to
study these models is to explore the possibility of constructing a background
independent quantum field theory where local degrees of freedom at low energies
arise from global topological (world-sheet) degrees of freedom at the
fundamental level.


title:
What type of dynamics arise in E_0-dilations of commuting quantum Markov
  process?

abstract:
  Let H be a separable Hilbert space. Given two strongly commuting
CP_0-semigroups $\phi$ and $\theta$ on B(H), there is a Hilbert space K
containing H and two (strongly) commuting E_0-semigroups $\alpha$ and $\beta$
such that $\phi_s \circ \theta_t (P_H A P_H) = P_H \alpha_s \circ \beta_t (A)
P_H$ for all s,t and all A in B(K).
  In this note we prove that if $\phi$ is not an automorphism semigroup then
$\alpha$ is cocycle conjugate to the minimal *-endomorphic dilation of $\phi$,
and that if $\phi$ is an automorphism semigroup then $\alpha$ is also an
automorphism semigroup. In particular, we conclude that if $\phi$ is not an
automorphism semigroup and has a bounded generator (in particular, if H is
finite dimensional) then $\alpha$ is a type I E_0-semigroup.


title: "Mass Inflation" With Lightlike Branes

abstract:
  We discuss properties of a new class of p-brane models, describing
intrinsically lightlike branes for any world-volume dimension, in various
gravitational backgrounds of interest in the context of black hole physics. One
of the characteristic features of these lightlike p-branes is that the brane
tension appears as an additional nontrivial dynamical world-volume degree of
freedom. Codimension one lightlike brane dynamics requires that bulk space with
a bulk metric of spherically symmetric type must possess an event horizon which
is automatically occupied by the lightlike brane while its tension evolves
exponentially with time. The latter phenomenon is an analog of the well known
"mass inflation" effect in black holes.


title:
Critical behavior of interfaces in disordered Potts ferromagnets :
  statistics of free-energy, energy and interfacial adsorption

abstract:
  A convenient way to study phase transitions of finite spins systems of linear
size $L$ is to fix boundary conditions that impose the presence of a
system-size interface. In this paper, we study the statistical properties of
such an interface in a disordered Potts ferromagnet in dimension $d=2$ within
Migdal-Kadanoff real space renormalization. We first focus on the interface
free-energy and energy to measure the singularities of the average and random
contributions, as well as the corresponding histograms, both in the
low-temperature phase and at criticality. We then consider the critical
behavior of the interfacial adsorption of non-boundary states. Our main
conclusion is that all singularities involve the correlation length
$\xi_{av}(T) \sim (T_c-T)^{-\nu}$ appearing in the average free-energy $\bar{F}
\sim (L/\xi_{av}(T))^{d_s}$ of the interface of dimension $d_s=d-1$, except for
the free-energy width $\Delta F \sim (L/\xi_{var}(T))^{\theta}$ that involves
the droplet exponent $\theta$ and another correlation length $\xi_{var}(T)$
which diverges more rapidly than $\xi_{av}(T)$. We compare with the spin-glass
transition in $d=3$, where $\xi_{var}(T)$ is the 'true' correlation length, and
where the interface energy presents unconventional scaling with a chaos
critical exponent $\zeta_c>1/\nu$ [Nifle and Hilhorst, Phys. Rev. Lett. 68,
2992 (1992)]. The common feature is that in both cases, the characteristic
length scale $L_{ch}(T)$ associated with the chaotic nature of the
low-temperature phase, diverges more slowly than the correlation length.


title:
A family of martingales generated by a process with independent
  increments

abstract:
  An explicit procedure to construct a family of martingales generated by a
process with independent increments is presented. The main tools are the
polynomials that give the relationship between the moments and cumulants, and a
set of martingales related to the jumps of the process called Teugels
martingales


title: Around the gap between sociophysics and sociology

abstract:
  Some basic sociophysical notions are described by a physicist, tentatively
for a sociologically-oriented reader.


title:
The MW is an exceptionnally quiet galaxy: implications for spiral
  formation

abstract:
  We compare both the Milky Way and M31 to local external disk galaxies within
the same mass range, using their relative locations in the planes formed by
Vflat vs. MK (the Tully-Fisher relation), j_disk (specific angular momentum)
and the average Fe abundance of stars in the galaxy outskirts. We find, for all
relationships, that the MW is systematically offset by 1 sigma or more, showing
a significant deficiency in stellar mass, angular momentum, disk radius and
[Fe/H] in the stars in its outskirts at a given Vflat. Our Galaxy appears to
have escaped any significant merger over the last 10-11 Gyr which may explain
its peculiar properties. As with M31, most local spirals show evidence for a
history shaped mainly by relatively recent merging.


title: Ultraperipheral Collisions at RHIC and LHC

abstract:
  A brief introduction to the physics of ultraperipheral collisions at collider
energies is given. Photon-hadron (proton/ nucleus) and photon-photon
interactions can be studied in a hitherto unexplored energy regime.


title:
Bound Pairs: Direct Evidence for Long-range Attraction between
  Like-Charged Colloids

abstract:
  We report observations of stable bound pairs in very dilute deionized aqueous
suspensions of highly charged polystyrene colloidal particles, with monovalent
counterions, using a confocal laser scanning microscope. Through an analysis of
several thousands of time series of confocal images recorded deep inside the
bulk suspension, we find that the measured pair-potential, U(r) has a
long-range attractive component with well depths larger than the thermal
energy. These observations provide a direct and unequivocal evidence for the
existence of long-range attraction in U(r) of like-charged colloidal particles.


title: Uniqueness and disjointness of Klyachko models

abstract:
  We show the uniqueness and disjointness of Klyachko models for GL(n,F) over a
non-archimedean local field F. This completes, in particular, the study of
Klyachko models on the unitary dual. Our local results imply a global rigidity
property for the discrete automorphic spectrum.


title: E-dilation of strongly commuting CP-semigroups (the nonunital case)

abstract:
  In a previous paper, we showed that every strongly commuting pair of
CP_0-semigroups on a von Neumann algebra (acting on a separable Hilbert space)
has an E_0-dilation. In this paper we show that if one restricts attention to
the von Neumann algebra B(H) then the unitality assumption can be dropped, that
is, we prove that every pair of strongly commuting CP-semigroups on B(H) has an
E-dilation. The proof is significantly different from the proof for the unital
case, and is based on a construction of Ptak from the 1980's designed
originally for constructing a unitary dilation to a two-parameter contraction
semigroup.


title:
The Century Survey Galactic Halo Project III: A Complete 4300 deg^2
  Survey of Blue Horizontal Branch Stars in the Metal-Weak Thick Disk and Inner
  Halo

abstract:
  We present a complete spectroscopic survey of 2414 2MASS-selected blue
horizontal branch (BHB) candidates selected over 4300 deg^2 of the sky. We
identify 655 BHB stars in this non-kinematically selected sample. We calculate
the luminosity function of field BHB stars and find evidence for very few hot
BHB stars in the field. The BHB stars located at a distance from the Galactic
plane |Z|<4 kpc trace what is clearly a metal-weak thick disk population, with
a mean metallicity of [Fe/H]= -1.7, a rotation velocity gradient of
dv_{rot}/d|Z|= -28+-3.4 km/s in the region |Z|<6 kpc, and a density scale
height of h_Z= 1.26+-0.1 kpc. The BHB stars located at 5<|Z|<9 kpc are a
predominantly inner-halo population, with a mean metallicity of [Fe/H]= -2.0
and a mean Galactic rotation of -4+-31 km/s. We infer the density of halo and
thick disk BHB stars is 104+-37 kpc^-3 near the Sun, and the relative
normalization of halo to thick-disk BHB stars is 4+-1% near the Sun.


title:
Modelling the Global Solar Corona II: Coronal Evolution and Filament
  Chirality Comparison

abstract:
  The hemispheric pattern of solar filaments is considered using
newly-developed simulations of the real photospheric and 3D coronal magnetic
fields over a 6-month period, on a global scale. The magnetic field direction
in the simulation is compared directly with the chirality of observed
filaments, at their observed locations. In our model the coronal field evolves
through a continuous sequence of nonlinear force-free equilibria, in response
to the changing photospheric boundary conditions and the emergence of new
magnetic flux. In total 119 magnetic bipoles with properties matching observed
active regions are inserted. These bipoles emerge twisted and inject magnetic
helicity into the solar atmosphere. When we choose the sign of this
active-region helicity to match that observed in each hemisphere, the model
produces the correct chirality for up to 96% of filaments, including exceptions
to the hemispheric pattern. If the emerging bipoles have zero helicity, or
helicity of the opposite sign, then this percentage is much reduced. In
addition, the simulation produces a higher proportion of filaments with the
correct chirality after longer times. This indicates that a key element in the
evolution of the coronal field is its long-term memory, and the build-up and
transport of helicity from low to high latitudes over many months. It
highlights the importance of continuous evolution of the coronal field, rather
than independent extrapolations at different times. This has significant
consequences for future modelling such as that related to the origin and
development of coronal mass ejections.


title:
Fast calculation of the electrostatic potential in ionic crystals by
  direct summation metho

abstract:
  An efficient real space method is derived for the evaluation of the
Madelung's potential of ionic crystals. The proposed method is an extension of
the Evjen's method. It takes advantage of a general analysis for the potential
convergence in real space. Indeed, we show that the series convergence is
exponential as a function of the number of annulled multipolar momenta in the
unit cell. The method proposed in this work reaches such an exponential
xconvergence rate. Its efficiency is comparable to the Ewald's method, however
unlike the latter, it uses only simple algebraic functions.


title:
Dissipation in the very early stage of the hydrodynamic evolution in
  relativistic heavy ion collisions

abstract:
  We propose a modification of the hydrodynamic model of the dynamics in
ultrarelativistic nuclear collisions. A modification of the energy-momentum
tensor at the initial stage describes the lack of isotropization of the
pressure. Subsequently, the pressure is relaxing towards the equilibrium
isotropic form in the local comoving frame. Within the Bjorken scaling solution
a bound is found on the decay time of the initial anisotropy of the
energy-momentum tensor. For the strongest dissipative effect allowed, we find a
relative entropy increase of about 30%, a significant hardening of the
transverse momentum spectra, and no effect on the HBT radii.


title: Hard supersymmetry-breaking "wrong-Higgs" couplings of the MSSM

abstract:
  In the minimal supersymmetric extension of the Standard Model (MSSM), if the
two Higgs doublets are lighter than some subset of the superpartners of the
Standard Model particles, then it is possible to integrate out the heavy states
to obtain an effective broken-supersymmetric low-energy Lagrangian. This
Lagrangian can contain dimension-four gauge invariant Higgs interactions that
violate supersymmetry (SUSY). The "wrong-Higgs" Yukawa couplings generated by
one-loop radiative corrections are a well known example of this phenomenon. In
this paper, we examine gauge invariant gaugino--higgsino--Higgs boson
interactions that violate supersymmetry. Such wrong-Higgs gaugino couplings can
be generated in models of gauge-mediated SUSY-breaking in which some of the
messenger fields couple to the MSSM Higgs bosons. In regions of parameter space
where the messenger scale is low and tan(beta) is large, these hard
SUSY-breaking operators yield tan(beta)-enhanced corrections to tree-level
supersymmetric relations in the chargino and neutralino sectors that can be as
large as 20%. We demonstrate how physical observables in the chargino sector
can be used to isolate the tan(beta)-enhanced effects derived from the
wrong-Higgs gaugino operators.


title: Asymmetric Fermi Superfluid With Two Types Of Pairings

abstract:
  We investigate the phase diagram in the plane of temperature and chemical
potential mismatch for an asymmetric fermion superfluid with double- and
single-species pairings. There is no mixing of these two types of pairings at
fixed chemical potential, but the introduction of the single species pairing
cures the magnetic instability at low temperature.


title: Algorithm to estimate the Hurst exponent of high-dimensional fractals

abstract:
  We propose an algorithm to estimate the Hurst exponent of high-dimensional
fractals, based on a generalized high-dimensional variance around a moving
average low-pass filter. As working examples, we consider rough surfaces
generated by the Random Midpoint Displacement and by the Cholesky-Levinson
Factorization algorithms. The surrogate surfaces have Hurst exponents ranging
from 0.1 to 0.9 with step 0.1, and different sizes. The computational
efficiency and the accuracy of the algorithm are also discussed.


title:
The Method of Normalized Correlations - A Fast Alternative to Maximum
  Likelihood Estimation for Random Processes and Isotropic Random Fields with
  Short-Range Dependence

abstract:
  This paper has been withdrawn by the authors, due the copyright policy of the
journal it has been submited to.


title:
On the elastic moduli of two-dimensional assemblies of disks: relevance
  and modeling of fluctuations in particle displacements and rotations

abstract:
  We determine the elastic moduli of two-dimensional assemblies of disks by
computer simulations. The disks interact through elastic contact forces, that
oppose the relative displacement at the contact points by means of a normal and
a tangential stiffness, both taken constant. Our simulations confirm that the
uniform strain assumption results in inaccurate predictions of the elastic
moduli, since large fluctuations in particle displacements and rotations occur.
We phrase their contribution in terms of the relative displacement they induce
at the contact points. We show that the fluctuations that determine the
equivalent continuum behavior depend on the average geometry of the assembly.
We further separate the contributions from the center displacement and the
particle rotation. The fluctuations result in a relaxation of the system, but
along the tangential direction the relaxation is generally entirely due to
rotations. We consider two theoretical formulations for predicting the elastic
moduli that include the fluctuations, namely the ``pair-fluctuation'' and the
``particle-fluctuation'' method. They are both based on the equilibrium of a
small subassembly, which is considered representative of the average structure.
We investigate the corresponding predictions of the elastic moduli over a range
of coordination numbers and of ratios between tangential and normal stiffness.
We find a significant improvement with respect to the uniform strain theory.
Furthermore, the dependence of the fluctuations on coordination number and
ratio of tangential to normal stiffness is qualitatively captured.


title: Cryptography from Noisy Storage

abstract:
  We show how to implement cryptographic primitives based on the realistic
assumption that quantum storage of qubits is noisy. We thereby consider
individual-storage attacks, i.e. the dishonest party attempts to store each
incoming qubit separately. Our model is similar to the model of bounded-quantum
storage, however, we consider an explicit noise model inspired by present-day
technology. To illustrate the power of this new model, we show that a protocol
for oblivious transfer (OT) is secure for any amount of quantum-storage noise,
as long as honest players can perform perfect quantum operations. Our model
also allows the security of protocols that cope with noise in the operations of
the honest players and achieve more advanced tasks such as secure
identification.


title: Room Temperature Magnetocaloric Effect in Ni-Mn-In

abstract:
  We have studied the effect of magnetic field on a non-stoichiometric Heusler
alloy Ni$_{50}$Mn$_{35}$In$_{15}$ that undergoes a martensitic as well as a
magnetic transition near room temperature. Temperature dependent magnetization
measurements demonstrate the influence of magnetic field on the structural
phase transition temperature. From the study of magnetization as a function of
applied field, we show the occurrence of inverse-magnetocaloric effect
associated with this magneto-structural transition. The magnetic entropy change
attains a value as high as 25 J/kg-K (at 5 T field) at room temperature as the
alloy transforms from the austenitic to martensitic phase with a concomitant
magnetic ordering.


title: Estimation of fuzzy anomalies in Water Distribution Systems

abstract:
  State estimation is necessary in diagnosing anomalies in Water Demand Systems
(WDS). In this paper we present a neural network performing such a task. State
estimation is performed by using optimization, which tries to reconcile all the
available information. Quantification of the uncertainty of the input data
(telemetry measures and demand predictions) can be achieved by means of robust
estate estimation. Using a mathematical model of the network, fuzzy estimated
states for anomalous states of the network can be obtained. They are used to
train a neural network capable of assessing WDS anomalies associated with
particular sets of measurements.


title:
New Results on the Phase Diagram of the FFXY Model: A Twisted CFT
  Approach

abstract:
  The issue of the number, nature and sequence of phase transitions in the
fully frustrated XY (FFXY) model is a highly non trivial one due to the complex
interplay between its continuous and discrete degrees of freedom. In this
contribution we attack such a problem by means of a twisted conformal field
theory (CFT) approach and show how it gives rise to the U (1)$\otimes Z_{2}$
symmetry and to the whole spectrum of excitations of the FFXY model.


title:
Simple Lie algebras of small characteristic VI. Completion of the
  classification

abstract:
  Let L be a finite-dimensional simple Lie algebra over an algebraically closed
field of F characteristic p>3. We prove that if the p-envelope of L in the
derivation algebra of L contains nonstandard tori of maximal dimension, then
p=5 and L is isomorphic to one of the Melikian algebras. Together with our
earlier results this implies that any finite-dimensional simple Lie algebra
over F is of classical, Cartan or Melikian type.


title:
Dipolar excitations at the LIII x-ray absorption edges of the heavy rare
  earth metals

abstract:
  We report measured dipolar asymmetry ratios at the LIII edges of the heavy
rare earth metals. The results are compared with a first principles calculation
and excellent agreement is found. A simple model of the scattering is
developed, enabling us to re-interpret the resonant x-ray scattering in these
materials and to identify the peaks in the asymmetry ratios with features in
the spin and orbital moment densities.


title:
First Measurement of the Production of a W Boson in Association with a
  Single Charm Quark in Proton Anti-proton Collisions at sqrt(s)=1.96 TeV

abstract:
  We present the first measurement of the production cross section of a W boson
with a single charm quark (c) in p-pbar collisions at sqrt(s)=1.96 TeV, using
soft muon tagging of c jets. In a data sample of ~1.8 fb-1, recorded with the
CDF II detector at the Fermilab Tevatron, we select events with W+1 or 2 jets.
We use the charge correlation between the W and the muon from the semileptonic
decay of a charm hadron to extract the Wc signal. We measure
sigma_{Wc}(p_{Tc}>20 GeV/c, |\eta_c|<1.5)\times BR(W->\ell\nu) = 9.8+/-3.2 pb,
in agreement with theoretical expectations.


title:
Comment on "Once more about the KK molecule approach to the light
  scalars"

abstract:
  In this manuscript we comment on the criticism raised recently by Achasov and
Kiselev [Phys. Rev. D 76, 077501 (2007)] on our work on the radiative decays
phi to gamma a_0/f_0 [Eur. Phys. J. A 24, 437 (2005)]. Specifically, we
demonstrate that their criticism relies on results that violate
gauge-invariance and is therefore invalid.


title: Flavour Physics and Grand Unification

abstract:
  In spite of the enormous success of the Standard Model (SM), we have strong
reasons to expect the presence of new physics beyond the SM at higher energies.
The idea of the Grand Unification of all the known interactions in nature is
perhaps the main reason behind these expectations. Low-energy Supersymmetry is
closely linked with grand unification as a solution of the hierarchy problem
associated with the ratio M_GUT / M_Z. In these lectures we will provide a
general overview of Grand Unification and Supersymmetry with special emphasis
on their phenomenological consequences at low energies. We will analyse the
flavour and CP problems of Supersymmetry and try to identify in these
associated low-energy observables possible indications of the existence of a
Grand Unified theory at high energies.


title: The CMB in a Causal Set Universe

abstract:
  We discuss Cosmic Microwave Background constraints on the causal set theory
of quantum gravity, which has made testable predictions about the nature of
dark energy. We flesh out previously discussed heuristic constraints by showing
how the power spectrum of causal set dark energy fluctuations can be found from
the overlap volumes of past light cones of points in the universe. Using a
modified Boltzmann code we put constraints on the single parameter of the
theory that are somewhat stronger than previous ones. We conclude that causal
set theory cannot explain late-time acceleration without radical alterations to
General Relativity.


title:
Finite temperature behavior of strongly disordered quantum magnets
  coupled to a dissipative bath

abstract:
  We study the effect of dissipation on the infinite randomness fixed point and
the Griffiths-McCoy singularities of random transverse Ising systems in chains,
ladders and in two-dimensions. A strong disorder renormalization group scheme
is presented that allows the computation of the finite temperature behavior of
the magnetic susceptibility and the spin specific heat. In the case of Ohmic
dissipation the susceptibility displays a crossover from Griffiths-McCoy
behavior (with a continuously varying dynamical exponent) to classical Curie
behavior at some temperature $T^*$. The specific heat displays Griffiths-McCoy
singularities over the whole temperature range. For super-Ohmic dissipation we
find an infinite randomness fixed point within the same universality class as
the transverse Ising system without dissipation. In this case the phase diagram
and the parameter dependence of the dynamical exponent in the Griffiths-McCoy
phase can be determined analytically.


title: Circumscribing Late Dark Matter Decays Model Independently

abstract:
  A number of theories, spanning a wide range of mass scales, predict dark
matter candidates that have lifetimes much longer than the age of the universe,
yet may produce a significant flux of gamma rays in their decays today. We
constrain such late decaying dark matter scenarios model-independently by
utilizing gamma-ray line emission limits from the Galactic Center region
obtained with the SPI spectrometer on INTEGRAL, and the determination of the
isotropic diffuse photon background by SPI, COMPTEL and EGRET observations. We
show that no more than ~5% of the unexplained MeV background can be produced by
late dark matter decays either in the Galactic halo or cosmological sources.


title: Displaying perfusion MRI images as color intensity projections

abstract:
  Dynamic susceptibility-weighted contrast-enhanced (DSC) MRI or perfusion-MRI
plays an important role in the non-invasive assessment of tumor vascularity.
However, the large number of images provided by the method makes display and
interpretation of the results challenging. Current practice is to display the
perfusion information as relative cerebral blood volume maps (rCBV). Color
intensity projections (CIPs) provides a simple, intuitive display of the
perfusion-MRI data so that regional perfusion characteristics are intrinsically
integrated into the anatomy structure the T2 images. The ease of use and quick
calculation time of CIPs should allow it to be easily integrated into current
analysis and interpretation pipelines.


title:
Probing new physics with long-lived charged particles produced by
  atmospheric and astrophysical neutrinos

abstract:
  As suggested by some extensions of the Standard Model of particle physics,
dark matter may be a super-weakly interacting lightest stable particle, while
the next-to-lightest particle (NLP) is charged and meta-stable. One could test
such a possibility with neutrino telescopes, by detecting the charged NLPs
produced in high-energy neutrino collisions with Earth matter. We study the
production of charged NLPs by both atmospheric and astrophysical neutrinos;
only the latter, which is largely uncertain and has not been detected yet, was
the focus of previous studies. We compute the resulting fluxes of the charged
NLPs, compare those of different origins, and analyze the dependence on the
underlying particle physics setup. We point out that even if the astrophysical
neutrino flux is very small, atmospheric neutrinos, especially those from the
prompt decay of charmed mesons, may provide a detectable flux of NLP pairs at
neutrino telescopes such as IceCube. We also comment on the flux of charged
NLPs expected from proton-nucleon collisions, and show that, for theoretically
motivated and phenomenologically viable models, it is typically sub-dominant
and below detectable rates.


title:
Comparing the notions of optimality in CP-nets, strategic games and soft
  constraints

abstract:
  The notion of optimality naturally arises in many areas of applied
mathematics and computer science concerned with decision making. Here we
consider this notion in the context of three formalisms used for different
purposes in reasoning about multi-agent systems: strategic games, CP-nets, and
soft constraints. To relate the notions of optimality in these formalisms we
introduce a natural qualitative modification of the notion of a strategic game.
We show then that the optimal outcomes of a CP-net are exactly the Nash
equilibria of such games. This allows us to use the techniques of game theory
to search for optimal outcomes of CP-nets and vice-versa, to use techniques
developed for CP-nets to search for Nash equilibria of the considered games.
Then, we relate the notion of optimality used in the area of soft constraints
to that used in a generalization of strategic games, called graphical games. In
particular we prove that for a natural class of soft constraints that includes
weighted constraints every optimal solution is both a Nash equilibrium and
Pareto efficient joint strategy. For a natural mapping in the other direction
we show that Pareto efficient joint strategies coincide with the optimal
solutions of soft constraints.


title:
Path integral measure factorization in path integrals for diffusion of
  Yang--Mills fields

abstract:
  Factorization of the (formal) path integral measure in a Wiener path
integrals for Yang--Mills diffusion is studied. Using the nonlinear filtering
stochastic differential equation, we perform the transformation of the path
integral defined on a total space of the Yang--Mills principal fiber bundle and
come to the reduced path integral on a Coulomb gauge surface. Integral relation
between the path integral representing the "quantum" evolution given on the
original manifold of Yang--Mills fields and the path integral on the reduced
manifold defined by the Coulomb gauge is obtained.


title: Understanding clustering in type space using field theoretic techniques

abstract:
  The birth/death process with mutation describes the evolution of a
population, and displays rich dynamics including clustering and fluctuations.
We discuss an analytical `field-theoretical' approach to the birth/death
process, using a simple dimensional analysis argument to describe evolution as
a `Super-Brownian Motion' in the infinite population limit. The field theory
technique provides corrections to this for large but finite population, and an
exact description at arbitrary population size. This allows a characterisation
of the difference between the evolution of a phenotype, for which strong local
clustering is observed, and a genotype for which distributions are more
dispersed. We describe the approach with sufficient detail for non-specialists.


title:
Multiplicity fluctuations in relativistic gases. From simple models to
  experiment

abstract:
  The aim of this paper is to give a short overview for the set of publications
considering recently found effect of non-equivalence of multiplicity
fluctuations in relativistic gases with globally conserved charge and energy.


title: Cubic-matrix splines and second-order matrix models

abstract:
  We discuss the direct use of cubic-matrix splines to obtain continuous
approximations to the unique solution of matrix models of the type $Y''(x) =
f(x,Y(x))$. For numerical illustration, an estimation of the approximation
error, an algorithm for its implementation, and an example are given.


title: Image Classification Using SVMs: One-against-One Vs One-against-All

abstract:
  Support Vector Machines (SVMs) are a relatively new supervised classification
technique to the land cover mapping community. They have their roots in
Statistical Learning Theory and have gained prominence because they are robust,
accurate and are effective even when using a small training sample. By their
nature SVMs are essentially binary classifiers, however, they can be adopted to
handle the multiple classification tasks common in remote sensing studies. The
two approaches commonly used are the One-Against-One (1A1) and One-Against-All
(1AA) techniques. In this paper, these approaches are evaluated in as far as
their impact and implication for land cover mapping. The main finding from this
research is that whereas the 1AA technique is more predisposed to yielding
unclassified and mixed pixels, the resulting classification accuracy is not
significantly different from 1A1 approach. It is the authors conclusion
therefore that ultimately the choice of technique adopted boils down to
personal preference and the uniqueness of the dataset at hand.


title:
Carmichael number variable relations: three-prime Carmichael numbers up
  to 10^24

abstract:
  Bounds and other relations involving variables connected with Carmichael
numbers are reviewed and extended. Families of numbers or individual numbers
attaining or approaching these bounds are given. A new algorithm for finding
three-prime Carmichael numbers is described, with its implementation up to
$10^{24}$. Statistics relevant to the distribution of three-prime Carmichael
numbers are given, with particular reference to the conjecture of Granville and
Pomerance in [A.Granville and C.Pomerance, Two contradictory conjectures
concerning Carmichael numbers, Math. Comp. 71 (2001), 883-908].


title:
Exploring an ultracold Fermi-Fermi mixture: Interspecies Feshbach
  resonances and scattering properties of 6Li and 40K

abstract:
  We report on the observation of Feshbach resonances in an ultracold mixture
of two fermionic species, 6Li and 40K. The experimental data are interpreted
using a simple asymptotic bound state model and full coupled channels
calculations. This unambiguously assigns the observed resonances in terms of
various s- and p-wave molecular states and fully characterizes the ground-state
scattering properties in any combination of spin states.


title: Use of Wikipedia Categories in Entity Ranking

abstract:
  Wikipedia is a useful source of knowledge that has many applications in
language processing and knowledge representation. The Wikipedia category graph
can be compared with the class hierarchy in an ontology; it has some
characteristics in common as well as some differences. In this paper, we
present our approach for answering entity ranking queries from the Wikipedia.
In particular, we explore how to make use of Wikipedia categories to improve
entity ranking effectiveness. Our experiments show that using categories of
example entities works significantly better than using loosely defined target
categories.


title: Quantum Blockades and Loop Currents in Graphene with Topological Defects

abstract:
  We investigate the effect of topological defects on the transport properties
of a narrow ballistic ribbon of graphene with zigzag edges. Our results show
that the longitudinal conductance vanishes at several discrete Fermi energies
where the system develops loop orbital electric currents with certain
chirality. The chirality depends on the direction of the applied bias voltage
and the sign of the local curvature created by the topological defects. This
novel quantum blockade phenomenon provides a new way to generate a magnetic
moment by an external electric field, which can prove useful in carbon
electronics.


title:
Structural parameters of star clusters: relations among light, mass and
  star-count radial profiles and the dependence on photometric depth

abstract:
  Structural parameters of model star clusters are measured in radial profiles
built from number-density, mass-density and surface-brightness distributions,
assuming as well different photometric conditions. Star clusters of different
ages, structure and mass functions are modelled by assuming that the radial
distribution of stars follows a pre-defined analytical form. Near-infrared
surface brightness and mass-density profiles result from mass-luminosity
relations taken from a set of isochrones. Core, tidal and half-light, half-mass
and half-star count radii, together with the concentration parameter, are
measured in the three types of profiles, which are built under different
photometric depths. While surface-brightness profiles are almost insensitive to
photometric depth, radii measured in number-density and mass-density profiles
change significantly with it. Compared to radii derived with deep photometry,
shallow profiles result in lower values. This effect increases for younger
ages. Radial profiles of clusters with a spatially-uniform mass function
produce radii that do not depend on depth. With deep photometry, number-density
profiles yield radii systematically larger than those derived from
surface-brightness ones. In general, low-noise surface-brightness profiles
result in uniform structural parameters that are essentially independent of
photometric depth. For less-populous star clusters, those projected against
dense fields and/or distant ones, which result in noisy surface-brightness
profiles, this work provides a quantitative way to estimate the intrinsic radii
by means of number-density profiles built with depth-limited photometry.


title: Primordial Non-Gaussianity in Multi-Scalar Inflation

abstract:
  We give a concise formula for the non-Gaussianity of the primordial curvature
perturbation generated on super-horizon scales in multi-scalar inflation model
without assuming slow-roll conditions. This is an extension of our previous
work. Using this formula, we study the generation of non-Gaussianity for the
double inflation models in which the slow-roll conditions are temporarily
violated after horizon exit, and we show that the non-linear parameter $f_{NL}$
for such models is suppressed by the slow-roll parameters evaluated at the time
of horizon exit.


title:
Electromagnetic form-factor of the $\pi$ meson with light-cone QCD sum
  rules

abstract:
  In this article, we calculate the electromagnetic form-factor of the $\pi$
meson with the light-cone QCD sum rules. The numerical value $F_\pi^{p}(0)
=0.999\pm 0.001$ is in excellent agreement with the experimental data
(extrapolated to the limit of zero momentum transfer, or the normalization
condition $F_\pi(0)=1$). For large momentum transfers, the values from the two
sum rules are all comparable with the experimental data and theoretical
estimations.


title: Natural Number Arithmetic in the Theory of Finite Sets

abstract:
  We describe a theory of finite sets, and investigate the analogue of
Dedekind's theory of natural number systems (simply infinite systems) in this
theory. Unlike the infinitary case, in our theory, natural number systems come
in differing lengths and with different closure properties. We give examples of
natural number systems incomparable in length; we define hierarchies of natural
number systems closed under increasingly powerful functions; and we describe a
method by which to construct natural number systems with given closure
properties. These natural number systems form natural models for various
systems of weak arithmetic.


title: MASH-II: More Planetary Nebulae from the AAO/UKST H\alpha Survey

abstract:
  We present a supplement to the Macquarie/AAO/Strasbourg H$\alpha$ planetary
nebulae (PNe) catalogue (MASH), which we denote MASH-II. The supplement
consists of over 300 true, likely and possible new Galactic PNe found after
re-examination of the entire AAO/UKST H$\alpha$ survey of the southern Galactic
Plane in digital form. We have spectroscopically confirmed over 240 of these
new candidates as bona-fide PNe and we include other high quality candidates
awaiting spectroscopic confirmation as possible PNe. These latest discoveries
largely comprise two distinct groups: small, star-like or moderately resolved
PNe at one end and mostly large, extremely low surface brightness PNe at the
other. Neither group were easy to discover from simple visual scrutiny of the
original survey exposures as for MASH but were relatively straightforward to
uncover from the digital images via application of semi-automated discovery
techniques. We suspect the few PNe still hidden in the H$\alpha$ survey will
lie outside our search criteria or be difficult to find.


title:
On Constructing the Analytical Solutions for Localizations in a Slender
  Cylinder Composed of an Incompressible Hyperelastic Material

abstract:
  In this paper, we study the localization phenomena in a slender cylinder
composed of an incompressible hyperelastic material subjected to axial tension.
We aim to construct the analytical solutions based on a three-dimensional
setting and use the analytical results to describe the key features observed in
the experiments by others. Using a novel approach of coupled series-asymptotic
expansions, we derive the normal form equation of the original governing
nonlinear partial differential equations. By writing the normal form equation
into a first-order dynamical system and with the help of the phase plane, we
manage to solve two boundary-value problems analytically. The explicit solution
expressions (in terms of integrals) are obtained. By analyzing the solutions,
we find that the width of the localization zone depends on the material
parameters but remains almost unchanged for the same material in the post-peak
region. Also, it is found that when the radius-length ratio is relatively small
there is a snap-back phenomenon. These results are well in agreement with the
experimental observations. Through an energy analysis, we also deduce the
preferred configuration and give a prediction when a snap-through can happen.
Finally, based on the maximum-energy-distortion theory, an analytical criterion
for the onset of material failure is provided.


title: Spectral asymptotics for arithmetic quotients of SL(n,R)/SO(n)

abstract:
  In this paper we study the asymptotic distribution of the cuspidal spectrum
of arithmetic quotients of the symmetric space S=SL(n,R)/SO(n). In particular,
we obtain Weyl's law with an estimation on the remainder term. This extends
results of Duistermaat-Kolk-Varadarajan on spectral asymptotics for compact
locally symmetric spaces to this non-compact setting.


title: Non-Hermitian Hamilton operator in open quantum systems

abstract:
  In the Feshbach projection operator (FPO) formalism the whole function space
is divided into two subspaces. One of them contains the wave functions
localized in a certain finite region while the continuum of extended scattering
wave functions is involved in the other subspace. The Hamilton operator of the
whole system is Hermitian, that of the localized part is, however,
non-Hermitian. This non-Hermitian Hamilton operator $H_{\rm eff}$ represents
the core of the FPO method in present-day studies. It gives a unified
description of discrete and resonance states. Furthermore, it contains the time
operator. The eigenvalues $z_\lambda$ and eigenfunctions $\phi_\lambda$ of
$H_{\rm eff}$ are an important ingredient of the $S$ matrix. They are energy
dependent. The phases of the $\phi_\lambda$ are, generally, nonrigid. Most
interesting physical effects are caused by the branch points in the complex
plane. On the one hand, they cause the avoided level crossings that appear as
level repulsion or widths bifurcation in approaching the branch points under
different conditions. On the other hand, observable values are usually enhanced
and accelerated in the vicinity of the branch points. In most cases, the theory
is time asymmetric. An exception are the ${\cal PT}$ symmetric bound states in
the continuum appearing in space symmetric systems due to the avoided level
crossing phenomenon in the complex plane. In the paper, the peculiarities of
the FPO method are considered and three typical phenomena are sketched: (i) the
unified description of decay and scattering processes, (ii) the appearance of
bound states in the continuum and (iii) the spectroscopic reordering processes
characteristic of the regime with overlapping resonances.


title: A BV subtlety

abstract:
  The standard BV complex is never acyclic provided that the equations of
motion have solutions and the admissible class of functions is general enough,
unless one introduces second-order antifields. This phenomenon is explicitly
illustrated for the harmonic oscillator and the free electromagnetic field.


title: The topology of symplectic circle bundles

abstract:
  We consider circle bundles over compact three-manifolds with symplectic total
spaces. We show that the base of such a space must be irreducible or the
product of the two-sphere with the circle. We then deduce that such a bundle
admits a symplectic form if and only if it admits one that is invariant under
the circle action in three special cases: namely if the base is Seifert
fibered, has vanishing Thurston norm, or if the total space admits a Lefschetz
fibration.


title:
The isotropic diffusion source approximation for supernova neutrino
  transport

abstract:
  Astrophysical observations originate from matter that interacts with
radiation or transported particles. We develop a pragmatic approximation in
order to enable multi-dimensional simulations with basic spectral radiative
transfer when the computational resources are not sufficient to solve the
complete Boltzmann transport equation. The distribution function of the
transported particles is decomposed into trapped and streaming particle
components. Their separate evolution equations are coupled by a source term
that converts trapped particles into streaming particles. We determine this
source term by requiring the correct diffusion limit. For a smooth transition
to the free streaming regime, this 'diffusion source' is limited by the matter
emissivity. The resulting streaming particle emission rates are integrated over
space to obtain the streaming particle flux. A geometric estimate of the flux
factor is used to convert the particle flux to the streaming particle density.
The efficiency of the scheme results from the freedom to use different
approximations for each particle component. In supernovae, reactions with
trapped particles on fast time scales establish equilibria that reduce the
number of primitive variables required to evolve the trapped particle
component. On the other hand, a stationary-state approximation facilitates the
treatment of the streaming particle component. Different approximations may
apply in applications to stellar atmospheres, star formation, or cosmological
radiative transfer. We compare the isotropic diffusion source approximation
with Boltzmann neutrino transport of electron flavour neutrinos in spherically
symmetric supernova models and find good agreement. An extension of the scheme
to the multi-dimensional case is also discussed.


title:
Field dependence of magnetic correlations through the polarization flop
  transition in multiferroic TbMnO3 : evidence for a magnetic memory effect

abstract:
  The field-induced multiferroic transition in TbMnO3 has been studied by
neutron scattering. Apart strong hysteresis, the magnetic transition associated
with the flop of electronic polarization exhibits a memory effect: after a
field sweep, TbMnO3 does not exhibit the same phase as that obtained by
zero-field cooling. The strong changes in the magnetic excitations across the
transition perfectly agree with a rotation of the cycloidal spiral plane
indicating that the inverse Dzyaloshinski-Moriya coupling causes the giant
magnetoelectric effect at the field-induced transition. The analysis of the
zone-center magnetic excitations identifies the electromagnon of the
multiferroic high-field phase.


title: New Higgs mechanism from the lattice

abstract:
  Spontaneous symmetry breaking has been observed in lattice simulations of
five-dimensional gauge theories on an orbifold. This effect is reproduced by
perturbation theory if it is modified to account for a finite cut-off. We
present a comparison of lattice and analytic results for bulk gauge group
SU(2).


title: Galactic Globular Clusters Database: a progress report

abstract:
  The present status of Galactic Globular Clusters Database is briefly
reviewed. The features implemented at the time writing are described, as well
as plans for future improvements.


title:
Renormalisability of the 2PI-Hartree approximation of multicomponent
  scalar models in the broken symmetry phase

abstract:
  Non-perturbative renormalisation of a general class of scalar field theories
is performed at the Hartree level truncation of the 2PI effective action in the
broken symmetry regime. Renormalised equations are explicitly constructed for
the one- and two-point functions. The non-perturbative counterterms are deduced
from the conditions for the cancellation of the overall and the subdivergences
in the complete Hartree-Dyson-Schwinger equations, with a transparent method.
The procedure proposed in the present paper is shown to be equivalent to the
iterative renormalisation method of Blaizot et al., Nucl. Phys. A736 (2004)
149.


title: Non-linear integral equations in {\cal {N}}=4 SYM

abstract:
  We survey and discuss the applications of the non-linear integral equation in
the framework of the Bethe Ansatz type equations which are conjectured to give
the eigenvalues of the dilatation operator in ${\cal {N}}=4$ SYM. Moreover, an
original idea (different from that of \cite {FMQR}) to derive a non-linear
integral equation is briefly depicted in Section 4.


title: Patterns of flavor signals in supersymmetric models

abstract:
  Quark and lepton flavor signals are studied in four supersymmetric models,
namely the minimal supergravity model, the minimal supersymmetric standard
model with right-handed neutrinos, SU(5) supersymmetric grand unified theory
with right-handed neutrinos and the minimal supersymmetric standard model with
U(2) flavor symmetry. We calculate b --> s(d) transition observables in B_d and
B_s decays, taking the constraint from the B_s--B_s-bar mixing recently
observed at Tevatron into account. We also calculate lepton flavor violating
processes mu --> e gamma, tau --> mu gamma and tau --> e gamma for the models
with right-handed neutrinos. We investigate possibilities to distinguish the
flavor structure of the supersymmetry breaking sector with use of patterns of
various flavor signals which are expected to be measured in experiments such as
MEG, LHCb and a future Super B Factory.


title:
Determination of the upper and lower bound of masslimit of degenerate
  fermionic dark matter objects

abstract:
  We give a gravitational upper limit for the mass of static degenerate
fermionic dark matter objects. The treatment we use includes fully relativistic
equations for describing the static solutions of these objects. We study the
influence of the annihilation of the particles on this mass limit. We give the
change of its value over the age of the Universe with annihilation cross
sections relevant for such fermions constituting the dark matter. Our
calculations take into account the possibility of Dirac as well Majorana
spinors.


title:
Persistent current and Wigner crystallization in a one dimensional
  quantum ring

abstract:
  We use Density Functional Theory to study interacting spinless electrons on a
one-dimensional quantum ring in the density range where the system undergoes
Wigner crystallization. The Wigner transition leads to a drastic ``collective''
electron localization due to the Wigner crystal pinning, provided a weak
impurity potential is applied. To reveal this localization we examine a
persistent current in a ring penetrated by a magnetic flux. Using the DFT-OEP
method we calculated the current as a function of the interaction parameter
r_S. We find that in the limit of vanishing impurity potential the persistent
current stays constant up to a critical value of r_S^c=2.05 but shows a drastic
exponential decay for larger r_S which reflects a formation of a pinned Wigner
crystal. Above r_S^c the amplitude of the electron density oscillations exactly
follows the (r_S-r_S^c)^{1/2} behaviour, confirming a second-order phase
transition as expected in the mean-field-type OEP approximation.


title: Two way subtable sum problems and quadratic Groebner bases

abstract:
  Hara, Takemura and Yoshida discuss toric ideals arising from two way subtable
sum problems and shows that these toric ideals are generated by quadratic
binomials if and only if the subtables are either diagonal or triangular. In
the present paper, we show that if the subtables are either diagonal or
triangular, then their toric ideals possess quadratic Groebner bases.


title: On the origin of continuum and line emission in CTTSs

abstract:
  We calculated profiles of CIV 1550, Si IV 1400, NV 1240 and OVI 1035 doublet
lines using results of 3D MHD simulations of disc accretion onto young stars
with dipole magnetic field. It appeared that our calculations can not reproduce
profiles of these lines observed (HST/GHRS-STIS and FUSE) in CTTSs's spectra.
We also found that the theory predicts much larger C IV 1550 line flux than
observed (up to two orders of magnitude in some cases) and argue that the main
portion of accretion energy in CTTSs is liberated outside accretion shock. We
conclude that the reason of disagreement between the theory and observation is
strongly non-dipole character of CTTS's magnetic field near its surface.


title: Electric transport and magnetic properties in multilayer graphene

abstract:
  We discuss electric transport and orbital magnetism of multilayer graphenes
in a weak-magnetic field using the matrix decomposition technique. At zero
temperature, the minimum conductivity is given by that of the monolayer system
multiplied by the layer number $N$, independent of the interlayer hopping $t$.
When the interlayer hopping satisfies the condition $t\gg \hbar/\tau$ with
$\tau$ being collision time of impurity scattering, $[N/2]$ kinks and $[N/2]+1$
plateaux appear in the Fermi-energy (gate voltage) dependence of the
conductivity and the Hall conductivity, respectively. These behaviors are
interpreted as multiband effects. We also found that the Hall conductivity and
the magnetic susceptibility take minimum value as a function of temperature,
for certain value of the gate voltage. This behavior is explained by
Fermi-energy dependence of these functions at zero temperature.


title: Holomorphic fillability and cohomology

abstract:
  I have withdrawn the paper, after having incorporated it into the paper
arXiv:0712.3484. In the meantime I have discovered that the main theorem proved
in the paper had already been proved by Bungart.


title:
Boundary effects of electromagnetic vacuum fluctuations on charged
  particles

abstract:
  The effects of electromagnetic vacuum fluctuations with the boundary on
charged particles is investigated. They may be observed via an electron
interference experiment near the conducting plate, where boundary effects of
vacuum fluctuations are found significant on coherence reduction of the
electrons. The dynamics of the charge under the influence of quantized
electromagnetic fields with a conducting plate is also studied. The
corresponding stochastic equation of motion is derived in the semiclassical
approximation, and the behavior of the charge's velocity fluctuations is
discussed.


title:
Representation theory of C-algebras for a higher order class of spheres
  and tori

abstract:
  We construct C-algebras for a class of surfaces that are inverse images of
certain polynomials of arbitrary degree. By using the directed graph associated
to a matrix, the representation theory can be understood in terms of ``loop''
and ``string'' representations, which are closely related to the dynamics of an
iterated map in the plane. As a particular class of algebras we introduce the
``Henon algebras'', for which the dynamical map is a generalized Henon map, and
give an example where irreducible representations of all dimensions exist.


title:
Effect of the intergalactic environment on the observability of Ly-alpha
  emitters during reionization

abstract:
  Observations of high-redshift Ly-alpha sources are a major tool for studying
the high-redshift Universe. We discuss the effect of the reionizing
intergalactic medium on the observability of Ly-alpha sources based on large
simulations of early structure formation with radiative transfer. This takes
into account self-consistently the reionization history, density, velocity and
ionization structures and nonlinear source clustering. We find that all fields
are highly anisotropic and as a consequence there are very large variations in
opacity among the different lines-of-sight. The velocity effects, from both
infall and source peculiar velocity are most important for the luminous
sources, affecting the line profile and depressing the bright end of the
luminosity function. The line profiles are generally asymmetric and the line
centers of the luminous sources are always absorbed due to the high density of
the local IGM. For both luminous and average sources the damping wing effects
are of similar magnitude and remain significant until fairly late.
  The ionizing flux in the ionized patch surrounding a high density peak is
generally strongly dominated, particularly at late times, by the cluster of
faint sources, rather than the central massive galaxy. The IGM absorption does
not change appreciably the correlation function of sources at high redshift.
Our derived luminosity function assuming constant mass-to-light ratio provides
an excellent match to the shape of the observed luminosity function at z=6.6
with faint-end slope of alpha=-1.5. The resulting mass-to-light ratio implies
that the majority of sources responsible for reionization are too faint to be
observed by the current surveys. (abridged)


title:
Generation and escape of local waves from the boundary of uncoupled
  cardiac tissue

abstract:
  We aim to understand the formation of abnormal waves of activity from
myocardial regions with diminished cell-to-cell coupling. In route to this
goal, we studied the behavior of a heterogeneous myocyte network in which a
sharp coupling gradient was placed under conditions of increasing network
automaticity. Experiments were conducted in monolayers of neonatal rat
cardiomyocytes using heptanol and isoproterenol as means of altering
cell-to-cell coupling and automaticity respectively. Experimental findings were
explained and expanded using a modified Beeler-Reuter numerical model. The data
suggests that the combination of a heterogeneous substrate, a gradient of
coupling and an increase in oscillatory activity of individual cells creates a
rich set of behaviors associated with self-generated spiral waves and ectopic
sources. Spiral waves feature a flattened shape and a pin-unpin drift type of
tip motion. These intercellular waves are action-potential based and can be
visualized with either voltage or calcium transient measurements. A source/load
mismatch on the interface between the boundary and well-coupled layers can lock
wavefronts emanating from both ectopic sources and rotating waves within the
inner layers of the coupling gradient. A numerical approach allowed us to
explore how: i) the spatial distribution of cells, ii) the amplitude and
dispersion of cell automaticity, iii) and the speed at which the coupling
gradient moves in space, affects wave behavior, including its escape into
well-coupled tissue.


title:
Radio spectrum evolution and magnetic field in extreme GPS radio
  sources. The case of RXJ1459+3337

abstract:
  Aims: The knowledge of the properties of the youngest radio sources is very
important in order to trace the earliest phase of the evolution of the radio
emission. RXJ1459+3337, with its high turnover frequency (~25 GHz) provides a
unique opportunity to study this class of extreme objects. Methods:
High-sensitivity multi-frequency VLA observations have been carried out to
measure the flux-density with high accuracy, while multi-frequency VLBA
observations were performed, aimed at determining the pc-scale structure.
Archival ROSAT data have been used to infer the X-ray luminosity. Results: The
comparison between our new VLA data and those available in the literature shows
a steady increment of the flux-density in the optically-thick part of the
spectrum and a decrement of the turnover frequency. In the optically-thin
regime, the source flux density has already started to decrease. Such a
variability can be explained in terms of an adiabatically-expanding homogeneous
radio component. The frequency range spanned by our VLBA observations, together
with the resolution achieved, allows us to determine the source size and the
turnover frequency, and then to derive the magnetic field directly from these
observable quantities. The value obtained in this way is in good agreement with
that computed assuming equipartition condition. A similar value is also
obtained by comparing the radio and X-ray luminosities.


title:
Transport of ions in a segmented linear Paul trap in
  printed-circuit-board technology

abstract:
  We describe the construction and operation of a segmented linear Paul trap,
fabricated in printed-circuit-board technology with an electrode segment width
of 500 microns. We prove the applicability of this technology to reliable ion
trapping and report the observation of Doppler cooled ion crystals of Ca-40
with this kind of traps. Measured trap frequencies agree with numerical
simulations at the level of a few percent from which we infer a high
fabrication accuracy of the segmented trap. To demonstrate its usefulness and
versatility for trapped ion experiments we study the fast transport of a single
ion. Our experimental results show a success rate of 99.0(1)% for a transport
distance of 2x2mm in a round-trip time of T=20us, which corresponds to 4 axial
oscillations only. We theoretically and experimentally investigate the
excitation of oscillations caused by fast ion transports with error-function
voltage ramps: For a slightly slower transport (a round-trip shuttle within
T=30us) we observe non-adiabatic motional excitation of 0.89(15)meV.


title:
The Neutron Energy Spectrum Study from the Phase II Solid Methane
  Moderator at the LENS Neutron Source

abstract:
  Neutron energy spectrum measurements from a solid methane moderator were
performed at the Low Energy Neutron Source (LENS) at Indiana University
Cyclotron Facility (IUCF) to verify our neutron scattering model of solid
methane. The time-of-flight method was used to measure the energy spectrum of
the moderator in the energy range of 0.1$meV\sim$ 1$eV$. Neutrons were counted
with a high efficiency $^{3}{He}$ detector. The solid methane moderator was
operated in phase II temperature and the energy spectra were measured at the
temperatures of 20K and 4K. We have also tested our newly-developed scattering
kernels for phase II solid methane by calculating the neutron spectral
intensity expected from the methane moderator at the LENS neutron source using
MCNP (Monte Carlo N-particle Transport Code). Within the expected accuracy of
our approximate approach, our model predicts both the neutron spectral
intensity and the optimal thickness of the moderator at both temperatures. The
predictions are compared to the measured energy spectra. The simulations agree
with the measurement data at both temperatures.


title:
Stochastic convergence of random search to fixed size Pareto set
  approximations

abstract:
  This paper presents the first convergence result for random search algorithms
to a subset of the Pareto set of given maximum size k with bounds on the
approximation quality. The core of the algorithm is a new selection criterion
based on a hypothetical multilevel grid on the objective space. It is shown
that, when using this criterion for accepting new search points, the sequence
of solution archives converges with probability one to a subset of the Pareto
set that epsilon-dominates the entire Pareto set. The obtained approximation
quality epsilon is equal to the size of the grid cells on the finest level of
resolution that allows an approximation with at most k points within the family
of grids considered. While the convergence result is of general theoretical
interest, the archiving algorithm might be of high practical value for any type
iterative multiobjective optimization method, such as evolutionary algorithms
or other metaheuristics, which all rely on the usage of a finite on-line memory
to store the best solutions found so far as the current approximation of the
Pareto set.


title:
On the impact of systematical uncertainties for the CP violation
  measurement in superbeam experiments

abstract:
  Superbeam experiments can, in principle, achieve impressive sensitivities for
CP violation in neutrino oscillations for large $\theta_{13}$. We study how
those sensitivities depend on assumptions about systematical uncertainties. We
focus on the second phase of T2K, the so-called T2HK experiment, and we
explicitly include a near detector in the analysis. Our main result is that
even an idealised near detector cannot remove the dependence on systematical
uncertainties completely. Thus additional information is required. We identify
certain combinations of uncertainties, which are the key to improve the
sensitivity to CP violation, for example the ratio of electron to muon neutrino
cross sections and efficiencies. For uncertainties on this ratio larger than
2%, T2HK is systematics dominated. We briefly discuss how our results apply to
a possible two far detector configuration, called T2KK. We do not find a
significant advantage with respect to the reduction of systematical errors for
the measurement of CP violation for this setup.


title: Floating Tip Nanolithography

abstract:
  We demonstrate noncontact, high quality surface modification with spatial
resolution of ~20 nm. The nanowriting is based on the interaction between the
surface and the tip of an Atomic force microscope illuminated by a focused
laser beam and hovering 1-4 nanometers above the surface without touching it.
The floating tip nanowriting is compared to mechanical surface scratching, and
is found to be much more reproducible, and of higher quality. In an
Apertureless Scanning Near Field Optical Microscope geometry the tip is
illuminated by a focused femtosecond laser, leading to two different, clearly
identifiable mechanisms for removing material from the surface: when heated by
the laser beam, the hot-tip thermally patterns the surface of low melting
temperature soft materials, and when focused right at the apex of the sharp
tip, the enhanced electric field of the laser beam causes ablation in high
melting temperature metal films.


title: Eclipsing Binaries with Possible Light-Time Effect

abstract:
  The period changes of six eclipsing binaries have been studied with focus on
the light-time effect. With the least squares method we also calculated
parameters of such an effect and properties of the unresolved body in these
systems. With these results we discussed the probability of presence of such
bodies in the systems with respect to possible confirmation by another method.
In two systems we also suggested the hypothesis of fourth body or magnetic
activity for explanation of the "second-order variability" after subtraction of
the light-time effect of the third body.


title: Possible complex annihilation and B -> K pi direct CP asymmetry

abstract:
  We point out that a sizable strong phase could be generated from the penguin
annihilation in the soft-collinear effective theory for B meson decays. Keeping
a small scale suppressed by O(Lambda/m_b), Lambda being a hadronic scale and
m_b the b quark mass, in the denominators of internal particle propagators
without expansion, the resultant strong phase can accommodate the data of the
B^0 -> K^-+ pi^+- direct CP asymmetry. Our study reconciles the opposite
conclusions on the real or complex penguin annihilation amplitude drawn in the
soft-collinear effective theory and in the perturbative QCD approach based on
k_T factorization theorem.


title:
Long wavelength limit of evolution of cosmological perturbations in the
  universe where scalar fields and fluids coexist

abstract:
  We present the LWL formula which represents the long wavelengh limit of the
solutions of evolution equations of cosmological perturbations in terms of the
exactly homogeneous solutions in the most general case where multiple scalar
fields and multiple perfect fluids coexist. We find the conserved quantity
which has origin in the adiabatic decaying mode, and by regarding this quantity
as the source term we determine the correction term which corrects the
discrepancy between the exactly homogeneous perturbations and the $k \to 0$
limit of the evolutions of cosmological perturbations. This LWL formula is
useful for investigating the evolutions of cosmological perturbations in the
early stage of our universe such as reheating after inflation and the curvaton
decay in the curvaton scenario. When we extract the long wavelength limits of
evolutions of cosmological perturbations from the exactly homogeneos
perturbations by the LWL formula, it is more convenient to describe the
corresponding exactly homogeneous system with not the cosmological time but the
scale factor as the evolution parameter. By applying the LWL formula to the
reheating model and the curvaton model with multiple scalar fields and multiple
radiation fluids, we obtain the S formula representing the final amplitude of
the Bardeen parameter in terms of the initial adiabatic and isocurvature
perturbations
  Keywords:cosmological perturbations,long wavelength limit,reheating,curvaton
  PACS number(s):98.80.Cq


title:
The BVRI Light Curves And Period Analysis Of The Beta Lyrae System XX
  Leonis

abstract:
  The contact eclipsing binary system XX Leonis (P = 0.97 days, sp A8) has been
analysed using the PHOEBE programme, based on the Wilson Devinney code. The
BVRI light curves were obtained during spring 2006 using the 20-cm telescope
and ST-7 CCD detector. The effective temperature of the primary component
determined from the photometric analysis is T=(7889+/-61)K, the inclination of
the orbit is i=(89.98+/-2.45)deg and the photometric mass ratio
q=(0.41+/-0.01). Also the third body hypothesis was suggested, based on the
period analysis using 57 minimum times and resulting the period of the third
body p3= (52.96+/-0.01)yr, amplitude A=(0.057+/-0.029)d and eccentricity
e=(0.79+/-0.08) which gives the minimum mass m3,min=(3.6+/-0.8)M_sun.


title: Role of Four-Quark Condensates in QCD Sum Rules

abstract:
  The QCD sum rule approach to the in-medium behavior of hadrons is discussed
for omega meson, nucleon and D meson. Emphasis is devoted to the impact of
four-quark condensates and to order parameters of spontaneous symmetry
breaking.


title:
Temporal evolution of mechanical properties of skeletal tissue
  regeneration in rabbits. An experimental study

abstract:
  Various mathematical models represent the effects of local mechanical
environment on the regulation of skeletal regeneration. Their relevance relies
on an accurate description of the evolving mechanical properties of the
regenerating tissue. The object of this study was to develop an experimental
model which made it possible to characterize the temporal evolution of the
structural and mechanical properties during unloaded enchondral osteogenesis in
the New Zealand rabbit, a standard animal model for studies of osteogenesis and
chondrogenesis. A 25mm segment of tibial diaphysis was removed sub-periosteally
from rabbits. The defect was repaired by the preserved periosteum. An external
fixator was applied to prevent mechanical loading during osteogenesis. The
regenerated skeletal tissues were studied by CT scan, histology and mechanical
tests. The traction tests between 7 to 21 days post-surgery were done on
formaldehyde-fixated tissue allowing to obtain force/displacement curves. The
viscoelastic properties of the regenerating skeletal tissues were visualized
throughout the repair process.


title: X-ray supernova remnants in nearby galaxies

abstract:
  We present the initial results from a study of the SNR population in a sample
of six nearby galaxies (NGC 2403, NGC 4214, NGC 4449, NGC 5204, NGC 3077, NGC
4395) based on Chandra archival data. We discuss the analysis of the Chandra
data and we present candidate SNR sources selected on the basis of their X-ray
colours. We also present deep [S II] 6716 & 6731 A and Halpha line images for
most of the galaxies in our sample, which provide optically selected samples of
SNRs. Comparison of the X-ray results with the complementary optical
observations provides a more complete picture of the SNR population and allows
us to address their X-ray emission. Our preliminary analysis of the [S
II]/Halpha images show that 48 X-ray sources are typically associated with
Halpha sources, 7 of which are SNR candidates based on their [S II]/Halpha
ratio and one is an already known radio SNR.


title: On conjugacy of unipotent elements in finite groups of Lie type

abstract:
  Let $\bfG$ be a connected reductive algebraic group defined over $\F_q$,
where $q$ is a power of a prime $p$ that is good for $\bfG$. Let $F$ be the
Frobenius morphism associated with the $\FF_q$-structure on $\bfG$ and set $G =
\bfG^F$, the fixed point subgroup of $F$. Let $\bfP$ be an $F$-stable parabolic
subgroup of $\bfG$ and let $\bfU$ be the unipotent radical of $\bfP$; set $P =
\bfP^F$ and $U = \bfU^F$. Let $G_\uni$ be the set of unipotent elements in $G$.
In this note we show that the number of conjugacy classes of $U$ in $G_\uni$ is
given by a polynomial in $q$ with integer coefficients.