title:
Evolution equation of quantum tomograms for a driven oscillator in the
  case of the general linear quantization

abstract:
  The symlectic quantum tomography for the general linear quantization is
introduced. Using the approach based upon the Wigner function techniques the
evolution equation of quantum tomograms is derived for a parametric driven
oscillator.


title: Discrete Higgs and the Cosmological Constant

abstract:
  It is proposed that the Higgs vacuum possesses a small-scale structure that
can explain the large discrepancy between the predicted electroweak vacuum
energy density and the observed cosmological constant. An effective Lagrangian
description is employed to obtain modifications to the Standard Model
predictions that can be tested at collider experiments.


title: Link invariants from finite racks

abstract:
  We define ambient isotopy invariants of oriented knots and links using the
counting invariants of framed links defined by finite racks. These invariants
reduce to the usual quandle counting invariant when the rack in question is a
quandle. We are able to further enhance these counting invariants with
2-cocycles from the coloring rack's second rack cohomology satisfying a new
degeneracy condition which reduces to the usual case for quandles.


title:
Effect of CuO chains on the local density of states in the vortex phase
  of YBa_2Cu_3O_7

abstract:
  We examine the effects of the CuO chains on the density of states in the
vortex phase in YBa_2Cu_3O_7, via a calculation based on the tight-binding
proximity model. In this model, chain superconductivity results from
single-electron hopping between the intrinsically-normal chains and
intrinsically-superconducting CuO_2 planes. The calculations are based on
self-consistent solutions of the Bogolyubov-de Gennes equations for a bilayer
consisting of a single CuO_2 layer and a single CuO chain layer. We find that,
in addition to the dispersing resonances found in single-layer models, the
chains introduce a second set of dispersing resonances associated with the
induced gap in the chain layer. These new resonances are highly anisotropic and
distort the vortex core shape.


title: Top Quark Physics at the LHC

abstract:
  An overview of the prospects of top quark physics at the LHC is presented.
The ATLAS and the CMS detectors are about to produce a large amount of data
with high top quark contents from the LHC proton-proton collisions. A wide
variet y of physics analyses is planned in both experiments, and a number of
useful insights have already been obtained regarding their detector performance
and physics potential. This summary is based on the talk presented at the
Hadron C ollider Physics Symposium 2008, Galena, Illinois, May 27-31, 2008.


title:
Relating the microscopic rules in coalescence-fragmentation models to
  the macroscopic cluster size distributions which emerge

abstract:
  Coalescence-fragmentation problems are of great interest across the physical,
biological, and recently social sciences. They are typically studied from the
perspective of the rate equations, at the heart of such models are the rules
used for coalescence and fragmentation. Here we discuss how changes in these
microscopic rules affect the macroscopic cluster-size distribution which
emerges from the solution to the rate equation. More generally, our work
elucidates the crucial role that the fragmentation rule can play in such
dynamical grouping models. We focus on two well-known models whose
fragmentation rules lie at opposite extremes setting the models within the
broader context of binary coalescence-fragmentation models. Further, we provide
a range of generalizations and new analytic results for a well-known model of
social group formation [V. M. Eguiluz and M. G. Zimmermann, Phys. Rev. Lett.
85, 5659 (2000)]. We develop analytic perturbation treatment of the original
model, and extend the mathematical to the treatment of growing and declining
populations.


title: Surface order-disorder phase transitions and percolation

abstract:
  In the present paper, the connection between surface order-disorder phase
transitions and the percolating properties of the adsorbed phase has been
studied. For this purpose, four lattice-gas models in presence of repulsive
interactions have been considered. Namely, monomers on honeycomb, square and
triangular lattices, and dimers (particles occupying two adjacent adsorption
sites) on square substrates. By using Monte Carlo simulation and finite-size
scaling analysis, we obtain the percolation threshold $\theta_c$ of the
adlayer, which presents an interesting dependence with $w/k_BT$ (being $w$,
$k_B$ and $T$, the lateral interaction energy, the Boltzmann's constant and
temperature, respectively). For each geometry and adsorbate size, a phase
diagram separating a percolating and a non-percolating region is determined.


title: Sums of squares and moment problems in equivariant situations

abstract:
  We begin a systematic study of positivity and moment problems in an
equivariant setting. Given a reductive group $G$ over $\R$ acting on an affine
$\R$-variety $V$, we consider the induced dual action on the coordinate ring
$\R[V]$ and on the linear dual space of $\R[V]$. In this setting, given an
invariant closed semialgebraic subset $K$ of $V(\R)$, we study the problem of
representation of invariant nonnegative polynomials on $K$ by invariant sums of
squares, and the closely related problem of representation of invariant linear
functionals on $\R[V]$ by invariant measures supported on $K$. To this end, we
analyse the relation between quadratic modules of $\R[V]$ and associated
quadratic modules of the (finitely generated) subring $\R[V]^G$ of invariant
polynomials. We apply our results to investigate the finite solvability of an
equivariant version of the multidimensional $K$-moment problem. Most of our
results are specific to the case where the group $G(\R)$ is compact.


title: An anticipating It\^o formula for L\'evy processes

abstract:
  In this paper, we use the Malliavin calculus techniques to obtain an
anticipative version of the change of variable formula for L\'evy processes.
Here the coefficients are in the domain of the anihilation (gradient) operator
in the "future sense", which includes the family of all adapted and
square-integrable processes. This domain was introduced on the Wiener space by
Al\`os and Nualart.


title: Why Does a Kronecker Model Result in Misleading Capacity Estimates?

abstract:
  Many recent works that study the performance of multi-input multi-output
(MIMO) systems in practice assume a Kronecker model where the variances of the
channel entries, upon decomposition on to the transmit and the receive
eigen-bases, admit a separable form. Measurement campaigns, however, show that
the Kronecker model results in poor estimates for capacity. Motivated by these
observations, a channel model that does not impose a separable structure has
been recently proposed and shown to fit the capacity of measured channels
better. In this work, we show that this recently proposed modeling framework
can be viewed as a natural consequence of channel decomposition on to its
canonical coordinates, the transmit and/or the receive eigen-bases. Using tools
from random matrix theory, we then establish the theoretical basis behind the
Kronecker mismatch at the low- and the high-SNR extremes: 1) Sparsity of the
dominant statistical degrees of freedom (DoF) in the true channel at the
low-SNR extreme, and 2) Non-regularity of the sparsity structure (disparities
in the distribution of the DoF across the rows and the columns) at the high-SNR
extreme.


title:
An Energy-Based Comparison of Long-Hop and Short-Hop Routing in MIMO
  Networks

abstract:
  This paper considers the problem of selecting either routes that consist of
long hops or routes that consist of short hops in a network of multiple-antenna
nodes, where each transmitting node employs spatial multiplexing. This
distance-dependent route selection problem is approached from the viewpoint of
energy efficiency, where a route is selected with the objective of minimizing
the transmission energy consumed while satisfying a target outage criterion at
the final destination. Deterministic line networks and two-dimensional random
networks are considered. It is shown that when 1) the number of hops traversed
between the source and destination grows large or 2) when the target success
probability approaches one or 3) when the number of transmit and/or receive
antennas grows large, short-hop routing requires less energy than long-hop
routing. It is also shown that if both routing strategies are subject to the
same delay constraint, long-hop routing requires less energy than short-hop
routing as the target success probability approaches one. In addition,
numerical analysis indicates that given loose outage constraints, only a small
number of transmit antennas are needed for short-hop routing to have its
maximum advantage over long-hop routing, while given stringent outage
constraints, the advantage of short-hop over long-hop routing always increases
with additional transmit antennas.


title: Superdisks and the structural asymmetry of radio galaxies

abstract:
  We present a sample of 16 radio galaxies, each of which is characterized by a
wide, elongated emission gap with fairly sharp and straight edges between the
two radio lobes. This particular subset of the 'superdisk' radio galaxies is
chosen because of a highly asymmetric location of the host elliptical galaxy
relative to the gap's central axis. In addition to posing a considerable
challenge to the existing models, such a morphology also means that the two
jets traverse highly unequal distances through the superdisk material. One thus
has a possibility to directly investigate if the marked asymmetry between the
two jets' interaction with the (much denser) ambient medium, during their
propagation, has a significant import for the brightness of the hotspot forming
near each jet's extremity. We also propose a new explanation for the formation
of superdisks through the merger of a smaller elliptical galaxy with the
massive host, in which the gas attached to the infalling galaxy deposits its
angular momentum into the host's circumgalactic gas, thereby causing it to
flatten into a fat pancake, or superdisk. The asymmetric location of the host
galaxy can be assisted by the kick imparted to it during the merger. We also
suggest a physical link between these radio galaxies and those with X-shaped
and Z-symmetric radio lobes, commonly believed to arise from mergers of two
galactic nuclei, each harboring a supermassive black hole.


title:
The Incompressible Navier-Stokes Limit of the Boltzmann Equation for
  Hard Cutoff Potentials

abstract:
  The present paper proves that all limit points of sequences of renormalized
solutions of the Boltzmann equation in the limit of small, asymptotically
equivalent Mach and Knudsen numbers are governed by Leray solutions of the
Navier-Stokes equations. This convergence result holds for hard cutoff
potentials in the sense of H. Grad, and therefore completes earlier results by
the same authors [Invent. Math. 155, 81-161(2004)] for Maxwell molecules.


title:
Evidence for Unconventional Superconductivity in Arsenic-Free Iron-Based
  Superconductor FeSe : A ^77Se-NMR Study

abstract:
  We report the results of $^{77}$Se--nuclear magnetic resonance (NMR) in
$\alpha$-FeSe, which exhibits a similar crystal structure to the
LaFeAsO$_{1-x}$F$_x$ superconductor and shows superconductivity at 8 K. The
nuclear-spin lattice relaxation rate $1/T_1$ shows $T^3$ behavior below the
superconducting transition temperature $T_c$ without a coherence peak. The
$T_1T=$ const. behavior, indicative of the Fermi liquid state, can be seen in a
wide temperature range above $T_c$. The superconductivity in $\alpha$-FeSe is
also an unconventional one as well as LaFeAsO$_{1-x}$F$_x$ and related
materials. The FeAs layer is not essential for the occurrence of the
unconventional superconductivity.


title:
Molecular Dynamics Simulation on a Glassforming NiZr- System: Diffusion
  Coefficients and Critical Temperature

abstract:
  The diffusion coefficients of Ni DNi and Zr DZr, and also the critical
temperature Tc of the system, as results of data analysis from Molecular
Dynamics (MD) Simulation, are presented. An NpT-Ensemble of 648 atoms is
simulated in a Box with L ~ 26,2 Angstrom by using Stillinger-Weber potential
model with adopting paramaters for NiZr-System that based on results of
first-principle electron teori from Hausleitner and Hafner. The present
simulations are carried out by numerically integrating the Newtonian equation
of atoms, and for integrating a fifth order predictor- corrector algorithm is
used with time step dt = 2.5 10-15 s. Then diffusion coefficients and a
critical temperature Tc are analyzed qualitatively on the basis of mode-
coupling theory (MCT) for glass transition (GT). One of MCT-predictions is that
temperature dependence of Diffusion coefficients follows a power-law with non-
universal exponent parameter gamma, namely Di ~|T-Tc|^gamma From analysis
results it is found that Tc ~ 950 K with gamma ~ 1.8 for Ni-atom and gamma ~
2.0 for Zr-atom.


title: Efficient quantum key distribution over a collective noise channel

abstract:
  We present two efficient quantum key distribution schemes over two different
collective-noise channels. The accepted hypothesis of collective noise is that
photons travel inside a time window small compared to the variation of noise.
Noiseless subspaces are made up of two Bell states and the spatial degree of
freedom is introduced to form two nonorthogonal bases. Although these protocols
resort to entangled states for encoding the key bit, the receiver is only
required to perform single-particle product measurements and there is no basis
mismatch. Moreover, the detection is passive as the receiver does not switch
his measurements between two conjugate measurement bases to get the key.


title: The Invention of Proteomic Code and mRNA Assisted Protein Folding

abstract:
  Background The theoretical requirements for a genetic code were well defined
and modeled by George Gamow and Francis Crick in the 50-es. Their models
failed. However the valid Genetic Code, provided by Nirenberg and Matthaei in
1961, ignores many theoretical requirements for a perfect Code. Something is
simply missing from the canonical Code.
  Results The 3x redundancy of the Genetic code is usually explained as a
necessity to increase the resistance of the mutation resistance of the genetic
information. However it has many additional roles. 1.) It has a periodical
structure which corresponds to the physico-chemical and structural properties
of amino acids. 2.) It provides physico-chemical definition of codon
boundaries. 3.) It defines a code for amino acid co-locations (interactions) in
the coded proteins. 4.) It regulates, through wobble bases the free folding
energy (and structure) of mRNAs. I shortly review the history of the Genetic
Code as well as my own published observations to provide a novel, original
explanation of its redundancy.
  Conclusions The redundant Genetic Code contains biological information which
is additional to the 64/20 definition of amino acids. This additional
information is used to define the 3D structure of coding nucleic acids as well
as the coded proteins and it is called the Proteomic Code and mRNA Assisted
Protein Folding.


title:
Optimal dataset combining in f_nl constraints from large scale structure
  in an idealised case

abstract:
  We consider the problem of optimal weighting of tracers of structure for the
purpose of constraining the non-Gaussianity parameter f_NL. We work within the
Fisher matrix formalism expanded around fiducial model with f_NL=0 and make
several simplifying assumptions. By slicing a general sample into infinitely
many samples with different biases, we derive the analytic expression for the
relevant Fisher matrix element. We next consider weighting schemes that
construct two effective samples from a single sample of tracers with a
continuously varying bias. We show that a particularly simple ansatz for
weighting functions can recover all information about f_NL in the initial
sample that is recoverable using a given bias observable and that simple
division into two equal samples is considerably suboptimal when sampling of
modes is good, but only marginally suboptimal in the limit where Poisson errors
dominate.


title:
Logarithmic corrections to entropy for black holes with hyperbolic
  horizon

abstract:
  We compute logarithmic corrections to entropy for black holes with hyperbolic
horizon. For this purpose, we introduce the topological black hole and MTZ
black holes in four dimensions, while in five dimensions, the topological black
holes and Gauss-Bonnet black hole with negative coupling are considered. As
they stand, logarithmic corrections are problematic because small black holes
with positive heat capacity have negative energies. However, introducing the
background state of extremal black hole, the logarithmic corrections are
performed for black hole with hyperbolic horizon.


title: Representations of Lie Superalgebras in Prime Characteristic I

abstract:
  We initiate the representation theory of restricted Lie superalgebras over an
algebraically closed field of characteristic p>2. A superalgebra generalization
of the celebrated Kac-Weisfeiler Conjecture is formulated, which exhibits a
mixture of p-power and 2-power divisibilities of dimensions of modules. We
establish the Conjecture for basic classical Lie superalgebras.


title:
Finite temperature Casimir effect in piston geometry and its classical
  limit

abstract:
  We consider the Casimir force acting on a $d$-dimensional rectangular piston
due to massless scalar field with periodic, Dirichlet and Neumann boundary
conditions and electromagnetic field with perfect electric conductor and
perfect magnetic conductor boundary conditions. It is verified analytically
that at any temperature, the Casimir force acting on the piston is always an
attractive force pulling the piston towards the interior region, and the
magnitude of the force gets larger as the separation $a$ gets smaller. Explicit
exact expressions for the Casimir force for small and large plate separations
and for low and high temperatures are computed. The limits of the Casimir force
acting on the piston when some pairs of transversal plates are large are also
derived. An interesting result regarding the influence of temperature is that
in contrast to the conventional result that the leading term of the Casimir
force acting on a wall of a rectangular cavity at high temperature is the
Stefan--Boltzmann (or black body radiation) term which is of order $T^{d+1}$,
it is found that the contributions of this term from the interior and exterior
regions cancel with each other in the case of piston. The high temperature
leading order term of the Casimir force acting on the piston is of order $T$,
which shows that the Casimir force has a nontrivial classical $\hbar\to 0$
limit.


title: Measurements of B Hadron Properties at the Tevatron

abstract:
  Recent measurements of B hadron properties carried out in sqrt(s)=1.96 TeV
p/p-bar collisions at the Tevatron are reviewed. Included are measurements of
the Bc+ meson lifetime, using J/psi+l+X final states, and the mass, using
J/psi+pi final states, a flavor specific measurement of the Bs0 lifetime in
Ds+pi+X decays, simultaneous measurements of the Bs0 lifetime and lifetime
difference in J/psi+phi decays, the first direct evidence and mass measurements
of the Xi_b- baryon, and measurements of the polarization of 1S charmonium. For
all measurements, charge conjugate modes are included.


title:
A note on the invariant subspace problem relative to a type ${\rm II}_1$
  factor

abstract:
  Let $\M$ be a type ${\rm II}_1$ factor with a faithful normal tracial state
$\tau$ and let $\M^\omega$ be the ultrapower algebra of $\M$. In this paper, we
prove that for every operator $T\in \M^\omega$, there is a family of
projections $\{P_t\}_{0\leq t\leq 1}$ in $\M^\omega$ such that $TP_t=P_tTP_t$,
$P_s\leq P_t$ if $s\leq t$, and $\tau_\omega(P_t)=t$. Let $\mathfrak{M}=\{Z \in
\M: \text{there is a family of projections} \{P_t\}_{0\leq t\leq 1}
  \text{in} \M \text{such that} ZP_t=P_tZP_t, P_s\leq P_t \text{if} s\leq t,
\text{and} \tau(P_t)=t\}$. As an application we show that for every operator
$T\in \M$ and $\epsilon>0$, there is an operator $S\in \mathfrak{M}$ such that
$\|S\|\leq \|T\|$ and $\|S-T\|_2<\epsilon$.
  We also show that $\prod_n^\omega M_n(\cc)$ is not $\ast$-isomorphic to the
ultrapower algebra of the hyperfinite type ${\rm II}_1$ factor.


title:
Measurement of the Top Quark Mass using Quantities with Minimal
  Dependence on the Jet Energy Scale

abstract:
  We present three measurements of the top quark mass in the lepton plus jets
channel with 1.9 fb-1 of data using quantities with minimal dependence on the
jet energy scale in the lepton plus jets channel at CDF. One measurement uses
the mean transverse decay length of b-tagged jets (L2d) to determine the top
mass, another uses the transverse momentum of the lepton (LepPt) to determine
the top mass, and a third measurement uses both variables simultaneously.
  Using the L2d variable we measure a top mass of 176.7 (+10.0) (-8.9) (stat)
+/- 3.4 (syst) GeV/c^2, using the LepPt variable we measure a top mass of 173.5
(+8.9) (-9.1) (stat) +/- 4.2 (syst) GeV/c^2, and doing the combined measurement
using both variables we arrive at a top mass result of 175.3 +/- 6.2 (stat) +/-
3.0 (syst) GeV/c^2. Since some of the systematic uncertainties are
statistically limited, these results are expected to improve significantly if
more data is added at the Tevatron in the future, or if the measurement is done
at the LHC.


title: Birth and death in discrete Morse theory

abstract:
  Suppose $M$ is a finite simplicial complex and that for $0=t_0,t_1,...,t_r=1$
we have a discrete Morse function $F_{t_i}:M\to \zr$. In this paper, we study
the births and deaths of critical cells for the functions $F_{t_i}$ and present
an algorithm for pairing the cells that occur in adjacent slices. We first
study the case where the triangulation of $M$ is the same for each $t_i$, and
then generalize to the case where the triangulations may differ. This has
potential applications in data imaging, where one has function values at a
sample of points in some region in space at several different times or at
different levels in an object.


title:
Hardy's Test versus the CHSH Test of Quantum Non-Locality: Fundamental
  and Practical Aspects

abstract:
  We compare two different tests of quantum non-locality, both in theoretical
terms and with respect to a possible implementation in a mesoscopic circuit:
Hardy's test [Hardy, Phys. Rev. Lett. \textbf{68}, 2981 (1992)] and the CHSH
test, the latter including a recently discovered inequality relevant for
experiments with three possible outcomes [Collins and Gisin, J. Phys. A
\textbf{37}, 1775 (2004)]. We clarify the geometry of the correlations defined
by Hardy's equations with respect to the polytope of causal correlations, and
show that these equations generalize to the CHSH inequality if the slightest
imperfections in the setup need to be taken into account. We propose a
mesoscopic circuit consisting of two interacting Mach-Zehnder interferometers
in a Hall bar system for which both Hardy's test and the CHSH test can be
realized with a simple change of gate voltages, and evaluate the robustness of
the two tests in the case of fluctuating experimental parameters. The proposed
setup is remarkably robust and should work for fluctuations of beam splitter
angles or phases up to the order of one radian, or single particle loss rates
up to about 15%.


title:
Scaling properties of complex networks: Toward Wilsonian renormalization
  for complex networks

abstract:
  Nowadays, scaling methods for general large-scale complex networks have been
developed. We proposed a new scaling scheme called "two-site scaling". This
scheme was applied iteratively to various networks, and we observed how the
degree distribution of the network changes by two-site scaling. In particular,
networks constructed by the BA algorithm behave differently from the networks
observed in the nature. In addition, an iterative scaling scheme can define a
new renormalizing method. We investigated the possibility of defining the
Wilsonian renormalization group method on general complex networks and its
application to the analysis of the dynamics of complex networks.


title: Trapping of Ultracold Atoms in a Hollow-core Photonic Crystal Fiber

abstract:
  Ultracold sodium atoms have been trapped inside a hollow-core optical fiber.
The atoms are transferred from a free space optical dipole trap into a trap
formed by a red-detuned gaussian light mode confined to the core of the fiber.
We show that at least 5% of the atoms held initially in the free space trap can
be loaded into the core of the fiber and retrieved outside.


title: Integrating OPC Data into GSN Infrastructures

abstract:
  This paper presents the design and the implementation of an interface
software component between OLE for Process Control (OPC) formatted data and the
Global Sensor Network (GSN) framework for management of data from sensors. This
interface, named wrapper in the GSN context, communicates in Data Access mode
with an OPC server and converts the received data to the internal GSN format,
according to several temporal modes. This work is realized in the context of a
Ph.D. Thesis about the control of distributed information fusion systems. The
developed component allows the injection of OPC data, like measurements or
industrial processes states information, into a distributed information fusion
system deployed in a GSN framework. The component behaves as a client of the
OPC server. Developed in Java and based on the Opensaca Utgard, it can be
deployed on any computation node supporting a Java virtual machine. The
experiments show the component conformity according to the Data Access 2.05a
specification of the OPC standard and to the temporal modes.


title:
I'm sorry to say, but your understanding of image processing
  fundamentals is absolutely wrong

abstract:
  The ongoing discussion whether modern vision systems have to be viewed as
visually-enabled cognitive systems or cognitively-enabled vision systems is
groundless, because perceptual and cognitive faculties of vision are separate
components of human (and consequently, artificial) information processing
system modeling.


title: Asymmetric Magnetization Reversal in a Single Exchange-Biased Micro Bar

abstract:
  The asymmetric magnetization reversal is studied in a single exchange-biased
microbar of 1.5 x 13 micrometer with anisotropic magnetoresistance and magnetic
force microscopy. The particle has a moment of less than 10^-9 emu and is not
accessible with standard magnetometry. The asymmetric hysteresis loop of
CoFe/CrMnPt shows a repeatable rotation process, followed by an irreversible
nucleation process that is marked by jumps in the magnetoresistance. The
induced unidirectional anisotropy enhances the rotation process in one branch
of the hysteresis loop, followed by a sped up nucleation process. Imprinted
ferromagnetic domain patterns left behind by the antiferromagnet are observed
after the nucleation process occurred but before complete saturation is
reached.


title: Classifying subcategories of modules over a commutative noetherian ring

abstract:
  Let R be a quotient ring of a commutative coherent regular ring by a finitely
generated ideal. Hovey gave a bijection between the set of coherent
subcategories of the category of finitely presented R-modules and the set of
thick subcategories of the derived category of perfect R-complexes. Using this
isomorphism, he proved that every coherent subcategory of finitely presented
R-modules is a Serre subcategory. In this paper, it is proved that this holds
whenever R is a commutative noetherian ring. This paper also yields a module
version of the bijection between the set of localizing subcategories of the
derived category of R-modules and the set of subsets of Spec R which was given
by Neeman.


title: Quantum walk based search algorithms

abstract:
  In this survey paper we give an intuitive treatment of the discrete time
quantization of classical Markov chains. Grover search and the quantum walk
based search algorithms of Ambainis, Szegedy and Magniez et al. will be stated
as quantum analogues of classical search procedures. We present a rather
detailed description of a somewhat simplified version of the MNRS algorithm.
Finally, in the query complexity model, we show how quantum walks can be
applied to the following search problems: Element Distinctness, Matrix Product
Verification, Restricted Range Associativity, Triangle, and Group
Commutativity.


title:
Study of Correlation Between Glucose Concentration and Reduced
  Scattering Coefficients in Turbid media using Optical Coherence Tomography

abstract:
  Noninvasive, non-contact and \textit{in vivo} monitoring of blood glucose is
a long needed pathology tool for saving patients from recurring pain and hassle
that can accompany conventional blood glucose testing methods. Optical
coherence tomography known for its high axial resolution imaging modality is
adopted in this article for monitoring glucose levels in tissue like media
non-invasively. Making use of changes in reduced scattering coefficient due to
the refractive-index mismatch between the extracellular fluid and the cellular
membranes and armed with a theoretical model, we establish a correlation
between the glucose concentration and reduced scattering coefficient. The
scattering coefficients are extracted from the deconvoluted interference signal
by using Monte-Carlo simulation with valid approximations. A program code using
NI LabVIEW(^{TM}) is developed for automation of the experiment, data
acquisition and analysis.


title:
Theoretical and experimental study of AC loss in HTS single pancake
  coils

abstract:
  The electromagnetic properties of a pancake coil in AC regime as a function
of the number of turns is studied theoretically and experimentally.
Specifically, the AC loss, the coil critical current and the voltage signal are
discussed. The coils are made of Bi2Sr2Ca2Cu3O10/Ag (BiSCCO) tape, although the
main qualitative results are also applicable to other kinds of superconducting
tapes, such as coated conductors. The AC loss and the voltage signal are
electrically measured using different pick up coils with the help of a
transformer. One of them avoids dealing with the huge coil inductance. Besides,
the critical current of the coils is experimentally determined by conventional
DC measurements. Furthermore, the critical current, the AC loss and the voltage
signal are simulated, showing a good agreement with the experiments. For all
simulations, the field dependent critical current density inferred from DC
measurements on a short tape sample is taken into account.


title: Casimir Pistons for Massive Scalar Fields

abstract:
  The Casimir force on two-dimensional pistons for massive scalar fields with
both Dirichlet and hybrid boundary conditions is computed. The physical result
is obtained by making use of generalized $\zeta$-function regularization
technique. The influence of the mass and the position of the piston in the
force is studied graphically. The Casimir force for massive scalar field is
compared to that for massless scalar field.


title: GRAVITY: getting to the event horizon of Sgr A*

abstract:
  We present the second-generation VLTI instrument GRAVITY, which currently is
in the preliminary design phase. GRAVITY is specifically designed to observe
highly relativistic motions of matter close to the event horizon of Sgr A*, the
massive black hole at center of the Milky Way. We have identified the key
design features needed to achieve this goal and present the resulting
instrument concept. It includes an integrated optics, 4-telescope, dual feed
beam combiner operated in a cryogenic vessel; near infrared wavefront sensing
adaptive optics; fringe tracking on secondary sources within the field of view
of the VLTI and a novel metrology concept. Simulations show that the planned
design matches the scientific needs; in particular that 10 microarcsecond
astrometry is feasible for a source with a magnitude of K=15 like Sgr A*, given
the availability of suitable phase reference sources.


title: On tabulating virtual strings

abstract:
  A virtual string can be defined as a closed curve on a surface modulo certain
equivalence relations. Turaev defined several invariants of virtual strings
which we use to produce a table of virtual strings up to 4 crossings. We
discuss progress in extending the tabulation to 5 crossings. We also provide a
counter-example to a statement of Kadokami.


title:
A first principles study on the electronic and magnetic properties of
  Ba$_{1-x}$K$_x$Fe$_2$As$_2$

abstract:
  We report a systematic first-principles study on the recent discovered
superconducting Ba$_{1-x}$K$_x$Fe$_2$As$_2$ systems ($x$ = 0.00, 0.25, 0.50,
0.75, and 1.00). Previous theoretical studies strongly overestimated the
magnetic moment on Fe of the parent compound BaFe$_2$As$_2$. Using a negative
on-site energy $U$, we obtain a magnetic moment 0.83 $\mu_B$ per Fe, which
agrees well with the experimental value (0.87 $\mu_B$). K doping tends to
increase the density of states at fermi level. The magnetic instability is
enhanced with light doping, and is then weaken by increasing the doping level.
The energetics for the different K doping sites are also discussed.


title: Bjorken Sum Rule and pQCD frontier on the move

abstract:
  The reasonableness of the use of perturbative QCD notions in the region close
to the scale of hadronization, i.e., below $\lesssim 1 \GeV$ is under study.
First, the interplay between higher orders of pQCD expansion and higher twist
contributions in the analysis of recent Jefferson Lab (JLab) data on the
Generalized Bjorken Sum Rule function $\Gamma_1^{p-n} (Q^2)$ at $0.1<Q^2< 3
{\rm GeV}^2$ is studied. It is shown that the inclusion of the higher-order
pQCD corrections could be absorbed, with good numerical accuracy, by change of
the normalization of the higher-twist terms. Second, to avoid the issue of
unphysical singularity (Landau pole at $Q=\Lambda\sim 400 \MeV $), we deal with
the ghost-free Analytic Perturbation Theory (APT) that recently proved to be an
intriguing candidate for a quantitative description of light quarkonia spectra
within the Bethe-Salpeter approach. The values of the twist coefficients
$\mu_{2k} $ extracted from the mentioned data by using the APT approach provide
a better convergence of the higher-twist series than with the common pQCD. As
the main result, a good quantitative description of the JLab data down to
$Q\simeq$ 350 MeV is achieved.


title:
Polaronic Pseudogap in the Metallic Phase of
  La$_{0.625}$Ca$_{0.375}$MnO$_3$ Thin Films

abstract:
  The electronic density of states (DOS) of
La$_{0.625}$Ca$_{0.375}$MnO$_3$(LCMO) strain free epitaxial thin films with an
insulator-metal transition temperature (T$_{IM}$) of 250 K was probed using
variable temperature scanning tunneling microscopy and spectroscopy. We find a
depression in the DOS with a finite zero bias conductance (ZBC) signifying a
pseudogap (PG) in 78-310 K temperature range. With cooling, the ZBC is found to
increase indicating an increased DOS near E$_F$. We interpret PG as a signature
of Jahn-Teller polarons while ZBC change, in agreement with the bulk
insulator-metal transition, optical Drude peak, and photoemission experiments
indicates the presence of free carriers at the Fermi energy in the metallic
phase. The free carriers are discussed in terms of correlated polaronic states.


title: Interstellar Chemistry: Radiation, Dust and Metals

abstract:
  An overview is given of the chemical processes that occur in primordial
systems under the influence of radiation, metal abundances and dust surface
reactions. It is found that radiative feedback effects differ for UV and X-ray
photons at any metallicity, with molecules surviving quite well under
irradiation by X-rays. Starburst and AGN will therefore enjoy quite different
cooling abilities for their dense molecular gas. The presence of a cool
molecular phase is strongly dependent on metallicity. Strong irradiation by
cosmic rays (>100x the Milky Way value) forces a large fraction of the CO gas
into neutral carbon. Dust is important for H2 and HD formation, already at
metallicities of 10^-4-10^-3 solar, for electron abundances below 10^-3.


title:
Electric-field driven long-lived spin excitations on a cylindrical
  surface with spin-orbit interaction

abstract:
  Based on quantum-kinetic equations, coupled spin-charge drift-diffusion
equations are derived for a two-dimensional electron gas on a cylindrical
surface. Besides the Rashba and Dresselhaus spin-orbit interaction, the elastic
scattering on impurities, and a constant electric field are taken into account.
  From the solution of the drift-diffusion equations, a long-lived spin
excitation is identified for spins coupled to the Rashba term on a cylinder
with a given radius. The electric-field driven weakly damped spin waves are
manifest in the components of the magnetization and have the potential for
non-ballistic spin-device applications.


title:
Cosmological evolution of supermassive black holes and AGN: a synthesis
  model for accretion and feedback

abstract:
  The growth of supermassive black holes (SMBH) through accretion is
accompanied by the release of enormous amounts of energy which can either be
radiated away, as happens in quasars, advected into the black hole, or disposed
of in kinetic form through powerful jets, as is observed, for example, in radio
galaxies. Here, I will present new constraints on the evolution of the SMBH
mass function and Eddington ratio distribution, obtained from a study of AGN
luminosity functions aimed at accounting for both radiative and kinetic energy
output of AGN in a systematic way. First, I discuss how a refined Soltan
argument leads to joint constraints on the mass-weighted average spin of SMBH
and of the total mass density of high redshift (z~5) and "wandering" black
holes. Then, I will show how to describe the downsizing trend observed in the
AGN population in terms of cosmological evolution of physical quantities (black
hole mass, accretion rate, radiative and kinetic energy output). Finally, the
redshift evolution of the AGN kinetic feedback will be briefly discussed and
compared with the radiative output of the evolving SMBH population, thus
providing a robust physical framework for phenomenological models of AGN
feedback within structure formation.


title:
Coherent nu-N scattering and the search for physics beyond the standard
  model

abstract:
  We focus in future proposals to measure coherent neutrino-nuclei scattering
and we show that such kind of experiments are very sensitive to nonstandard
neutrino interactions with quarks. First in a model independent parametrization
and then we focused in particular models such as leptoquarks and models with
extra neutral gauge bosons and with R-parity breaking interactions. We show
that in all these three different types of new physics it is possible to obtain
competitive bounds to those of future collider experiments. For the particular
case of leptoquarks we found that the expected sensitivity to the coupling and
mass for most of the future experimental setups is quite better than the
current constraints.


title: European ALMA operations: the interaction with and support to the users

abstract:
  The Atacama Large Millimetre/submillimetre Array (ALMA) is one of the largest
and most complicated observatories ever built. Constructing and operating an
observatory at high altitude (5000m) in a cost effective and safe manner, with
minimal effect on the environment creates interesting challenges. Since the
array will have to adapt quickly to prevailing weather conditions, ALMA will be
operated exclusively in service mode. By the time of full science operations,
the fundamental ALMA data product shall be calibrated, deconvolved data cubes
and images, but raw data and data reduction software will be made available to
users as well. User support is provided by the ALMA Regional Centres (ARCs)
located in Europe, North America and Japan. These ARCs constitute the interface
between the user community and the ALMA observatory in Chile. For European
users the European ARC is being set up as a cluster of nodes located throughout
Europe, with the main centre at the ESO Headquarters in Garching. The main
centre serves as the access portal and in synergy with the distributed network
of ARC nodes, the main aim of the ARC is to optimize the ALMA science output
and to fully exploit this unique and powerful facility. The aim of this article
is to introduce the process of proposing for observing time, subsequent
execution of the observations, obtaining and processing of the data in the ALMA
epoch. The complete end-to-end process of the ALMA data flow from the proposal
submission to the data delivery is described.


title: X(3872) and Other Possible Heavy Molecular States

abstract:
  We perform a systematic study of the possible molecular states composed of a
pair of heavy mesons such as $D\bar D$, $D^\ast\bar D$, $D^\ast \bar D^\ast$ in
the framework of the meson exchange model. The exchanged mesons include the
pseudoscalar, scalar and vector mesons. Through our investigation, we find that
(1) the structure X(3764) is not a molecular state; (2) There exists strong
attraction in the range $r < 1$ fm for the $D^*\bar D^*$ system with $J=0, 1$.
If future experiments confirm $Z^+(4051)$ as a loosely bound molecular state,
its quantum number is probably $J^{P}=0^+$. Its partner state $\Phi^{**0}$ may
be searched for in the $\pi^0\chi_{c1}$ channel; (3) The vector meson exchange
provides strong attraction in the $D^\ast \bar D$ channel together with the
pion exchange. A bound state solution exists with a reasonable cutoff parameter
$\Lambda\sim 1.4$ GeV. X(3872) may be accommodated as a molecular state
dynamically although drawing a very definite conclusion needs further
investigation; (4) The $B^\ast \bar B$ molecular state exists.


title: Measurement of $y_{CP}$ in $D$ meson decays to CP eigenstates

abstract:
  We present a measurement of the $D^0$-$\overline{D}^0$ mixing parameter
$y_{CP}$ using a flavor-untagged sample of $D^0\to K_S^0K^+K^-$ decays. The
measurement is based on a 673 fb$^{-1}$ data sample recorded by the Belle
detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We find $y_{CP} =
(0.21 \pm 0.63 ({\rm stat.})\pm 0.78 (\rm syst.) \pm 0.01(\rm model))%$.


title:
Optimal Beamforming for Two-Way Multi-Antenna Relay Channel with
  Analogue Network Coding

abstract:
  This paper studies the wireless two-way relay channel (TWRC), where two
source nodes, S1 and S2, exchange information through an assisting relay node,
R. It is assumed that R receives the sum signal from S1 and S2 in one
time-slot, and then amplifies and forwards the received signal to both S1 and
S2 in the next time-slot. By applying the principle of analogue network (ANC),
each of S1 and S2 cancels the so-called "self-interference" in the received
signal from R and then decodes the desired message. Assuming that S1 and S2 are
each equipped with a single antenna and R with multi-antennas, this paper
analyzes the capacity region of an ANC-based TWRC with linear processing
(beamforming) at R. The capacity region contains all the achievable
bidirectional rate-pairs of S1 and S2 under the given transmit power
constraints at S1, S2, and R. We present the optimal relay beamforming
structure as well as an efficient algorithm to compute the optimal beamforming
matrix based on convex optimization techniques. Low-complexity suboptimal relay
beamforming schemes are also presented, and their achievable rates are compared
against the capacity with the optimal scheme.


title: Effects of turbulent mixing on the nonequilibrium critical behaviour

abstract:
  We study effects of turbulent mixing on the critical behaviour of a
nonequilibrium system near its second-order phase transition between the
absorbing and fluctuating states. The model describes the spreading of an agent
(e.g., infectious disease) in a reaction-diffusion system and belongs to the
universality class of the directed bond percolation process, also known as
simple epidemic process, and is equivalent to the Reggeon field theory. The
turbulent advecting velocity field is modelled by the Obukhov--Kraichnan's
rapid-change ensemble: Gaussian statistics with the correlation function < vv>
\propto \delta(t-t') k^{-d-\xi}, where k is the wave number and 0<\xi<2 is a
free parameter. Using the field theoretic renormalization group we show that,
depending on the relation between the exponent \xi and the space dimensionality
d, the system reveals different types of large-scale asymptotic behaviour,
associated with four possible fixed points of the renormalization group
equations. In addition to known regimes (ordinary diffusion, ordinary directed
percolation process, and passively advected scalar field), existence of a new
nonequilibrium universality class is established, and the corresponding
critical dimensions are calculated to first order of the double expansion in
\xi and \varepsilon=4-d (one-loop approximation). It turns out, however, that
the most realistic values \xi=4/3 (Kolmogorov's fully developed turbulence) and
d=2 or 3 correspond to the case of passive scalar field, when the nonlinearity
of the Reggeon model is irrelevant and the spreading of the agent is completely
determined by the turbulent transfer.


title:
Recent Structural Evolution of Early-Type Galaxies: Size Growth from z=1
  to z=0

abstract:
  Strong size and internal density evolution of early-type galaxies between z~2
and the present has been reported by several authors. Here we analyze samples
of nearby and distant (z~1) galaxies with dynamically measured masses in order
to confirm the previous, model-dependent results and constrain the
uncertainties that may play a role. Velocity dispersion measurements are taken
from the literature for 50 morphologically selected 0.8<z<1.2 field and cluster
early-type galaxies with typical masses 2e11 Msol. Sizes are determined with
ACS imaging. We compare the distant sample with a large sample of nearby
(0.04<z<0.08) early-type galaxies extracted from the SDSS for which we
determine sizes, masses, and densities in a consistent manner, using
simulations to quantify systematic differences between the size measurements of
nearby and distant galaxies. We find a highly significant structural difference
between the nearby and distant samples, regardless of sample selection effects.
The implied evolution in size at fixed mass between z=1 and the present is a
factor of 1.97(0.15). This is in qualitative agreement with semianalytic
models; however, the observed evolution is much faster than the predicted
evolution. Our results reinforce and are quantitatively consistent with
previous, photometric studies that found size evolution of up to a factor of 5
since z~2. A combination of structural evolution of individual galaxies through
the accretion of companions and the continuous formation of early-type galaxies
through increasingly gas-poor mergers is one plausible explanation of the
observations.


title: Structure and phase equilibria of the Widom-Rowlinson model

abstract:
  The Widom-Rowlinson model plays an important role in the statistical
mechanics of second order phase transitions and yet there currently exists no
theoretical approach capable of accurately predicting both the microscopic
structure and phase equilibria. We address this issue using computer
simulation, density functional theory and integral equation theory. A detailed
study of the pair correlation functions obtained from computer simulation
motivates a closure of the Ornstein-Zernike equations which gives a good
description of the pair structure and locates the critical point to an accuracy
of 2 percent.


title:
Influence of Band and Orbital Degeneracies on Ferromagnetism in the
  Periodic Anderson Model

abstract:
  We investigate the influence of degeneracies of the conduction band and the
$f$-orbital on the stability of ferromagnetism in the periodic Anderson model.
To this end we calculate the temperature dependence of the inverse
susceptibility for different degeneracies $D^c, D^f$ and conduction electron
densities $n^c$ within the dynamical mean-field theory. A strong increase of
the Curie temperature $T_c$ with the degeneracy $D^f$ of the localized
$f$-level is found. For $D^c \leq D^f$ a simple \emph{ansatz} based on a
mean-field treatment of the RKKY interaction is shown to imply a scaling
behavior of $T_c$ as a function of the conduction electron density per band
which is well obeyed by the numerical results. In particular, $T_c$ is found to
have a maximum at $n^c / D^c\approx 0.3$.


title: Structural precursor to freezing: An integral equation study

abstract:
  Recent simulation studies have drawn attention to the shoulder which forms in
the second peak of the radial distribution function of hard-spheres at
densities close to freezing and which is associated with local crystalline
ordering in the dense fluid. We address this structural precursor to freezing
using an inhomogeneous integral equation theory capable of describing local
packing constraints to a high level of accuracy. The addition of a short-range
attractive interaction leads to a well known broadening of the fluid-solid
coexistence region as a function of attraction strength. The appearence of a
shoulder in our calculated radial distribution functions is found to be
consistent with the broadened coexistence region for a simple model potential,
thus demonstrating that the shoulder is not exclusively a high density packing
effect.


title: Towards a realistic axion star

abstract:
  In this work we estimate the radius and the mass of a self-gravitating system
made of axions. The quantum axion field satisfies the Klein-Gordon equation in
a curved space-time and the metric components of this space-time are solutions
to the Einstein equations with a source term given by the vacuum expectation
value of the energy-momentum operator constructed from the axion field. As a
first step towards an axion star we consider the up to the sixth term in the
axion potential expansion. We found that axion stars would have masses of the
order of asteroids and radius of the order of few centimeters.


title: Triviality from the Exact Renormalization Group

abstract:
  Using the exact renormalization group, it is shown that no physically
acceptable non-trivial fixed points, with positive anomalous dimension, exist
for (i) O(N) scalar field theory in four or more dimensions, (ii) non-compact,
pure Abelian gauge theory in any dimension. It is then shown, for both theories
in any dimension, that otherwise physically acceptable non-trivial fixed points
with negative anomalous dimension are non-unitary. In addition, a very simple
demonstration is given, directly from the exact renormalization group, that
should a critical fixed point exist for either theory in any dimension, then
the n-point correlation functions exhibit the expected behaviour.


title:
Quantal Effects on Spinodal Instabilities in Charge Asymmetric Nuclear
  Matter

abstract:
  Quantal effects on growth of spinodal instabilities in charge asymmetric
nuclear matter are investigated in the framework of a stochastic mean field
approach. Due to quantal effects, in both symmetric and asymmetric matter,
dominant unstable modes shift towards longer wavelengths and modes with wave
numbers larger than the Fermi momentum are strongly suppressed. As a result of
quantum statistical effects, in particular at lower temperatures, magnitude of
density fluctuations grows larger than those calculated in semi-classical
approximation.


title: On the hitting times of quantum versus random walks

abstract:
  In this paper we define new Monte Carlo type classical and quantum hitting
times, and we prove several relationships among these and the already existing
Las Vegas type definitions. In particular, we show that for some marked state
the two types of hitting time are of the same order in both the classical and
the quantum case.
  Further, we prove that for any reversible ergodic Markov chain $P$, the
quantum hitting time of the quantum analogue of $P$ has the same order as the
square root of the classical hitting time of $P$. We also investigate the
(im)possibility of achieving a gap greater than quadratic using an alternative
quantum walk.
  Finally, we present new quantum algorithms for the detection and finding
problems. The complexities of both algorithms are related to the new,
potentially smaller, quantum hitting times. The detection algorithm is based on
phase estimation and is particularly simple. The finding algorithm combines a
similar phase estimation based procedure with ideas of Tulsi from his recent
theorem for the 2D grid. Extending his result, we show that for any
state-transitive Markov chain with unique marked state, the quantum hitting
time is of the same order for both the detection and finding problems.


title: Quark--hadron duality in lepton scattering off nuclei

abstract:
  A phenomenological study of quark--hadron duality in electron and neutrino
scattering on nuclei is performed. We compute the structure functions $F_2$ and
$xF_3$ in the resonance region within a framework that includes the
Dortmund-group model for the production of the {f}{i}rst four lowest-lying
baryonic resonances and a relativistic mean-field model for nuclei. We consider
four-momentum transfers between 0.2 and 2.5 GeV$^2$. The results indicate that
nuclear effects play a different role in the resonance and DIS region. We find
that global but not local duality works well. In the studied range of
four-momentum transfers, the integrated strength of the computed nuclear
structure functions in the resonance region, is considerably lower than the DIS
one.


title:
Single Spin Asymmetries on a transversely polarised proton target at
  COMPASS

abstract:
  COMPASS is a running fixed-target experiment at the CERN SPS with a rich
physics program focused on nucleon spin structure and on hadron spectroscopy.
One of the main goals of the spin program is the measurement of the transverse
spin effects in semi-inclusive DIS off transversely polarised nucleons. In the
years 2002, 2003 and 2004 data have been taken using a 160 $GeV/c$ naturally
polarised $\mu^{+}$ beam and a deuterium target ($^{6}LiD$) transversely
polarised respect to the beam direction. In 2007 the run year has been devoted
to collect data with a proton ($NH_{3}$) target. The preliminary results for
the Collins and Sivers asymmetries, extracted from the 2007 data with
transverse target polarisation, are presented here. Results are also compared
with existing model predictions.


title: MSSM Higgs Couplings to Bottom Quarks: Two-Loop Corrections

abstract:
  We present the two-loop SUSY-QCD corrections to the effective bottom Yukawa
couplings within the minimal supersymmetric extension of the Standard Model.
The effective Yukawa couplings include the resummation of the non-decoupling
corrections Delta m_b for large values of tg(beta). We have derived the
two-loop SUSY-QCD corrections to the leading SUSY-QCD and top-induced
SUSY-electroweak contributions to Delta m_b. The scale dependence of the
resummed Yukawa couplings is reduced from O(10%) to the per-cent level. These
results reduce the theoretical uncertainties of the MSSM Higgs branching ratios
to the accuracy which can be achieved at a future linear e+e- collider.


title: On the Dynamical Complexity of Small-World Networks of Spiking Neurons

abstract:
  A computer model is described which is used to assess the dynamical
complexity of a class of networks of spiking neurons with small-world
properties. Networks are constructed by forming an initially segregated set of
highly intra-connected clusters and then applying a probabilistic rewiring
method reminiscent of the Watts-Strogatz procedure to make inter-cluster
connections. Causal density, which counts the number of independent significant
interactions among a system's components, is used to assess dynamical
complexity. This measure was chosen because it employs lagged observations, and
is therefore more sensitive to temporally smeared evidence of segregation and
integration than its alternatives. The results broadly support the hypothesis
that small-world topology promotes dynamical complexity, but reveal a narrow
parameter range within which this occurs for the network topology under
investigation, and suggest an inverse correlation with phase synchrony inside
this range.


title: Quantum fluctuations in the mazer

abstract:
  Quantum fluctuations in the mazer are considered, arising either from the
atomic motion or from the quantized intracavity field. Analytical results, for
both the meza and the hyperbolic secant mode profile, predict for example an
attenuation of tunneling resonances due to such fluctuations. The case of a
Gaussian mode profile is studied numerically using a wave packet propagation
approach. The method automatically takes into account fluctuations in the
atomic motion and the dynamics is especially considered at or adjacent to a
tunnel resonance. We find that the system evolution is greatly sensitive to the
atom-field detuning, bringing about a discussion about the concept of
adiabaticity in this model. Further, a novel collapse-revival phenomena is
demonstrated, originating from the quantum fluctuations in the atomic motion
rather from field fluctuations as is normally the case.


title:
On varieties of almost minimal degree I: Secant loci of rational normal
  scrolls

abstract:
  To complete the classification theory and the structure theory of varieties
of almost minimal degree, that is of non-degenerate irreducible projective
varieties whose degree exceeds the codimension by precisely 2, a natural
approach is to investigate simple projections of varieties of minimal degree.
Let $\tilde X \subset {\mathbb P}^{r+1}_K$ be a variety of minimal degree and
of codimension at least 2, and consider $X_p = \pi_p (\tilde X) \subset
{\mathbb P}^r_K$ where $p \in {\mathbb P}^{r+1}_K \backslash \tilde X$. By
\cite{B-Sche}, it turns out that the cohomological and local properties of
$X_p$ are governed by the secant locus $\Sigma_p (\tilde X)$ of $\tilde X$ with
respect to $p$.
  Along these lines, the present paper is devoted to give a geometric
description of the secant stratification of $\tilde X$, that is of the
decomposition of ${\mathbb P}^{r+1}_K$ via the types of secant loci. We show
that there are exactly six possibilities for the secant locus $\Sigma_p (\tilde
X)$, and we precisely describe each stratum of the secant stratification of
$\tilde X$, each of which turns out to be a quasi-projective variety.
  As an application, we obtain the classification of all non-normal Del Pezzo
varieties by providing a complete list of pairs $(\tilde X, p)$ where $\tilde X
\subset {\mathbb P}^{r+1}_K$ is a variety of minimal degree, $p$ is a closed
point in $\mathbb P^{r+1}_K \setminus \tilde X$ and $X_p \subset {\mathbb P}^r
_K$ is a Del Pezzo variety.


title:
Are there the VP couplings in the psi(3770) non-charmed decays hidden
  behind the current experiment measurements?

abstract:
  A global analysis of the full amplitudes for $e^+e^- \to$ VP (Vector and
Pseudoscalar) channels at $\sqrt{s}$ =3.773 GeV and 3.670 GeV, which were
measured by the CLEO-c Collaboration, shows that those measurements are
essentially nontrivial for searching for the $\psi(3770)$ non-$D\bar D$ decays.
Unlike the nearly negative verdict on the $\psi(3770)$ strong decays to the VP
channels in the original analysis of the CLEO-c data, there exist some unusual
solutions that predict the remarkable strength of SU(3) symmetry VP decay of
$\psi(3770)$ resonance, which give some clue to understand the mechanism of
$\psi(3770)$ non-$D\bar D$ decays and to reexplain the well-known $\rho-\pi$
puzzle in the J/$\psi$ and $\psi(3686)$ decays.


title: A radiation-like era before inflation

abstract:
  We show that the semiclassical approximation to the Wheeler-DeWitt equation
for the minisuperspace of a minimally coupled scalar field in the spatially
flat de Sitter Universe prompts the existence of an initial power-law evolution
driven by non-adiabatic terms from the gravitational wavefunction which act
like radiation. This simple model hence describes the onset of inflation from a
previous radiation-like expansion during which the cosmological constant is
already present but subleading.


title:
The relationship between gas content and star formation rate in spiral
  galaxies. Comparing the local field with the Virgo cluster

abstract:
  Despite many studies of the star formation in spiral galaxies, a complete and
coherent understanding of the physical processes that regulate the birth of
stars has not yet been achieved, nor a unanimous consent was reached, despite
the many attempts, on the effects of the environment on the star formation in
galaxies member of rich clusters. We focus on the local and global Schmidt law
and we investigate how cluster galaxies have their star formation activity
perturbed. We collect multifrequency imaging for a sample of spiral galaxies,
member of the Virgo cluster and of the local field; we compute the surface
density profiles for the young and for the bulk of the stellar components, for
the molecular and for the atomic gas. Our analysis shows that the bulk of the
star formation correlates with the molecular gas, but the atomic gas is
important or even crucial in supporting the star formation activity in the
outer part of the disks. Moreover, we show that cluster members which suffer
from a moderate HI removal have their molecular component and their SFR
quenched, while highly perturbed galaxies show an additional truncation in
their star forming disks. Our results are consistent with a model in which the
atomic hydrogen is the fundamental fuel for the star formation, either directly
or indirectly through the molecular phase; therefore galaxies whose HI
reservoirs have been depleted suffer from starvation or even from truncation of
their star formation activity.


title: Homometric Point Sets and Inverse Problems

abstract:
  The inverse problem of diffraction theory in essence amounts to the
reconstruction of the atomic positions of a solid from its diffraction image.
  From a mathematical perspective, this is a notoriously difficult problem,
even in the idealised situation of perfect diffraction from an infinite
structure.
  Here, the problem is analysed via the autocorrelation measure of the
underlying point set, where two point sets are called homometric when they
share the same autocorrelation. For the class of mathematical quasicrystals
within a given cut and project scheme, the homometry problem becomes equivalent
to Matheron's covariogram problem, in the sense of determining the window from
its covariogram. Although certain uniqueness results are known for convex
windows, interesting examples of distinct homometric model sets already emerge
in the plane.
  The uncertainty level increases in the presence of diffuse scattering.
Already in one dimension, a mixed spectrum can be compatible with structures of
different entropy. We expand on this example by constructing a family of mixed
systems with fixed diffraction image but varying entropy. We also outline how
this generalises to higher dimension.


title: Group Invariant Entanglements in Generalized Tensor Products

abstract:
  The group invariance of entanglement is obtained within a very general and
simple setup of the latter, given by a recently introduced considerably
extended concept of tensor products. This general approach to entanglement -
unlike the usual one given in the particular setup of tensor products of vector
spaces - turns out not to need any specific algebraic structure. The resulting
advantage is that, entanglement being in fact defined by a negation, its
presence in a general setup increases the chances of its manifestations, thus
also its availability as a resource.


title:
Future e^+e^- flavour factories: detector challenges and physics
  expectations

abstract:
  Prospects of the two future e^+e^- flavour factories are discussed.
  The detector designs and the technical challenges are described together with
the motivating physics background.


title:
The Fundamental Theorem of Algebra made effective: an elementary
  real-algebraic proof via Sturm chains

abstract:
  Sturm's theorem (1829/35) provides an elegant algorithm to count and locate
the real roots of any real polynomial. In his residue calculus (1831/37) Cauchy
extended Sturm's method to count and locate the complex roots of any complex
polynomial. For holomorphic functions Cauchy's index is based on contour
integration, but in the special case of polynomials it can effectively be
calculated via Sturm chains using euclidean division as in the real case. In
this way we provide an algebraic proof of Cauchy's theorem for polynomials over
any real closed field. As our main tool, we formalize Gauss' geometric notion
of winding number (1799) in the real-algebraic setting, from which we derive a
real-algebraic proof of the Fundamental Theorem of Algebra. The proof is
elementary inasmuch as it uses only the intermediate value theorem and
arithmetic of real polynomials. It can thus be formulated in the first-order
language of real closed fields. Moreover, the proof is constructive and
immediately translates to an algebraic root-finding algorithm.


title: Nonstandard Lorentz-Einstein transformations

abstract:
  The standard Lorentz transformations establish a relationship between the
space-time coordinates of the same event when detected from two inertial
reference frames I and I' in the standard arrangement. This event is
characterized by the space-time coordinates E(x,tE) and E'(x',t'E), tE and t'E
representing the readings of the standard synchronized clocks C(x) and C'(x')
located in the two frames where the event takes place. We obtain the
nonstandard Lorentz transformations establishing a "physically" correct
relationship between the readings of the standard synchronized clocks and the
readings of other clocks (ta,t'a) of the same inertial reference frames. This
relationship of the type tE=f(x,ta), expresses the standard Lorentz
transformations as a function of ta and t'a respectively. We present several
cases of nonstandard Lorentz transformation (the case of radar detection, the
case when one reference frame is filled with an ideal transparent dielectric
and the case of relativity of the apparent, actual and synchronized positions
of the same moving particle).


title:
Probing the Hofstadter butterfly with the quantum oscillation of
  magnetization

abstract:
  We have developed a different quantum transfer matrix method to accurately
determine thermodynamic properties of the Hofstadter model. This method
resolves a technical problem which is intractable by other methods and makes
the calculation of physical quantities of the Hofstadter model in the
thermodynamic limit at finite temperatures feasible. It is shown that the
quantum correction to the de Haas-van Alphen (dHvA) oscillation of
magnetization bears the energy structure of Hofstadter butterfly. The
measurement of this quantum correction, which can be materialized on the
superlattice or cold atom systems, can reveal unambiguously the Hofstadter
fractal energy spectrum.


title: Boundary conformal field theories and loop models

abstract:
  We propose a systematic method to extract conformal loop models for rational
conformal field theories (CFT). Method is based on defining an ADE model for
boundary primary operators by using the fusion matrices of these operators as
adjacency matrices. These loop models respect the conformal boundary
conditions. We discuss the loop models that can be extracted by this method for
minimal CFTs and then we will give dilute O(n) loop models on the square
lattice as examples for these loop models. We give also some proposals for WZW
SU(2) models.


title: On vector analogs of the modified Volterra lattice

abstract:
  Modified Volterra lattice admits two vector generalizations. One of them is
studied for the first time. The zero curvature representations, B\"acklund
transformations, nonlinear superposition principle and the simplest explicit
solutions of soliton and breather type are presented for both vector lattices.
The relations with some other integrable equations are established.


title: Local temperature in quantum thermal states

abstract:
  We consider blocks of quantum spins in a chain at thermal equilibrium,
focusing on their properties from a thermodynamical perspective. Whereas in
classical systems the temperature behaves as an intensive magnitude, a
deviation from this behavior is expected in quantum systems. In particular, we
see that under some conditions the description of the blocks as thermal states
with the same global temperature as the whole chain fails. We analyze this
issue by employing the quantum fidelity as a figure of merit, singling out in
detail the departure from the classical behavior. The influence in this sense
of zero-temperature quantum phase transitions can be clearly observed within
this approach. Then we show that the blocks can be considered indeed as thermal
states with a high fidelity, provided an effective local temperature is
properly identified. Such a result originates from typical properties of
reduced sub-systems of energy-constrained Hilbert spaces. Finally, the relation
between local and global temperature is analyzed as a function of the size of
the blocks and the system parameters.


title: Use of Astronomical Literature - A Report on Usage Patterns

abstract:
  In this paper we present a number of metrics for usage of the SAO/NASA
Astrophysics Data System (ADS). Since the ADS is used by the entire
astronomical community, these are indicative of how the astronomical literature
is used. We will show how the use of the ADS has changed both quantitatively
and qualitatively. We will also show that different types of users access the
system in different ways. Finally, we show how use of the ADS has evolved over
the years in various regions of the world.
  The ADS is funded by NASA Grant NNG06GG68G.


title:
Implications of Recent Measurements of the Milky Way Rotation for the
  Orbit of the Large Magellanic Cloud

abstract:
  We examine the implications of recent measurements of the Milky Way rotation
for the trajectory of the Large Magellanic Cloud. The ~ 14+/-6% increase in the
MW circular velocity relative to the IAU standard of 220 km/s changes the
qualitative nature of the inferred LMC orbit. Instead of the LMC being
gravitationally unbound, as has been implied based on a recent measurement of
its proper motion, we find that the past orbit of the LMC is naturally confined
within the virial boundary of the MW, although still not as tightly bound as in
previous estimates.


title: The Overlapping Muffin-Tin Approximation

abstract:
  We present the formalism and demonstrate the use of the overlapping
muffin-tin approximation (OMTA). This fits a full potential to a superposition
of spherically symmetric short-ranged potential wells plus a constant. For
one-electron potentials of this form, the standard multiple-scattering methods
can solve Schr\"{o}dingers' equation correctly to 1st order in the potential
overlap. Choosing an augmented-plane-wave method as the source of the full
potential, we illustrate the procedure for diamond-structured Si. First, we
compare the potential in the Si-centered OMTA with the full potential, and then
compare the corresponding OMTA $N$-th order muffin-tin orbital and
full-potential LAPW band structures. We find that the two latter agree
qualitatively for a wide range of overlaps and that the valence bands have an
rms deviation of 20 meV/electron for 30% radial overlap. Smaller overlaps give
worse potentials and larger overlaps give larger 2nd-order errors of the
multiple-scattering method. To further remove the mean error of the bands for
small overlaps is simple.


title:
Magnetic correlations in La2-xSrxCoO4 studied by neutron scattering :
  possible evidence for stripe phases

abstract:
  Spin correlations in LSCO have been studied by neutron scattering. The
commensurate antiferromagnetic order of the parent compound persists on a very
short range up to a Sr content of x=0.3, whereas small amounts of Sr suppress
commensurate antiferromagnetism in cuprates and in nickelates. For x>0.3 we
find incommensurate spin ordering with the modulation closely following the
amount of doping. These incommensurate phases strongly resemble the stripe
phases observed in cuprates and nickelates, but incommensurate magnetic
ordering appears only at larger Sr content in the cobaltates due to a reduced
charge mobility.


title:
Hawking radiation for higher dimensional Einstein-Yang-Mills linear
  dilaton black holes

abstract:
  Recently, Hawking radiation from a $4-$dimensional linear dilaton black hole
solution to Einstein-Maxwell-Dilaton (EMD) theory, via a method of computing
exactly the semi-classical radiation, has been derived by Cl\U{e9}ment, et al.
Their results show that, whenever solution is available to the massless scalar
wave equation, an exact computation of the radiation spectrum leads to the
Hawking temperature $T_{H}$. We apply the same method to derive Hawking
radiation spectrum for higher dimensional linear dilaton black holes in the
Einstein-Yang-Mills-Dilaton (EYMD) and Einstein-Maxwell-Dilaton (EMD) theories.
Our results show that the radiation with high frequencies for these massive
black holes reveal some remarkable information about the $T_{H}$.


title: Yang-Baxter deformations and rack cohomology

abstract:
  Every rack $Q$ provides a set-theoretic solution $c_Q$ of the Yang-Baxter
equation. This article examines the deformation theory of $c_Q$ within the
space of Yang-Baxter operators over a ring $\A$, a problem initiated by Freyd
and Yetter in 1989. As our main result we classify deformations in the modular
case, which had previously been left in suspense, and establish that every
deformation of $c_Q$ is gauge-equivalent to a quasi-diagonal one. Stated
informally, in a quasi-diagonal deformation only behaviourally equivalent
elements interact. In the extreme case, where all elements of $Q$ are
behaviourally distinct, Yang-Baxter cohomology thus collapses to its diagonal
part, which we identify with rack cohomology. The latter has been intensively
studied in recent years and, in the modular case, is known to produce
non-trivial and topologically interesting Yang-Baxter deformations.


title: Similarity versus Coincidence Rotations of Lattices

abstract:
  The groups of similarity and coincidence rotations of an arbitrary lattice L
in d-dimensional Euclidean space are considered. It is shown that the group of
similarity rotations contains the coincidence rotations as a normal subgroup.
Furthermore, the structure of the corresponding factor group is examined. If
the dimension d is a prime number, this factor group is an elementary Abelian
d-group. Moreover, if L is a rational lattice, the factor group is trivial (d
odd) or an elementary Abelian 2-group (d even).


title: Global and touchdown behaviour of the generalized MEMS device equation

abstract:
  We prove the local and global existence of solutions of the generalized
micro-electromechanical system (MEMS) equation $u_t =\Delta u+\lambda
f(x)/g(u)$, $u<1$, in $\Omega\times (0,\infty)$, $u(x,t)=0$ on
$\partial\Omega\times (0,\infty)$, $u(x,0)=u_0$ in $\Omega$, where
$\Omega\subset\Bbb{R}^n$ is a bounded domain, $\lambda >0$ is a constant, $0\le
f\in C^{\alpha}(\overline{\Omega})$, $f\not\equiv 0$, for some constant
$0<\alpha<1$, $0<g\in C^2((-\infty,1))$ such that $g'(s)\le 0$ for any $s<1$
and $u_0\in L^1(\Omega)$ with $u_0\le a<1$ for some constant $a$. We prove that
there exists a constant $\lambda^{\ast}=\lambda^{\ast}(\Omega, f,g)>0$ such
that the associated stationary problem has a solution for any
$0\le\lambda<\lambda^*$ and has no solution for any $\lambda>\lambda^*$. We
obtain comparison theorems for the generalized MEMS equation. Under a mild
assumption on the initial value we prove the convergence of global solutions to
the solution of the corresponding stationary elliptic equation as $t\to\infty$
for any $0\le\lambda<\lambda^*$. We also obtain various conditions for the
existence of a touchdown time $T>0$ for the solution $u$. That is a time $T>0$
such that $\lim_{t\nearrow T}\sup_{\Omega}u(\cdot,t)=1$.


title:
Stay by thy neighbor? Social organization determines the efficiency of
  biodiversity markets with spatial incentives

abstract:
  Market-based conservation instruments, such as payments, auctions or tradable
permits, are environmental policies that create financial incentives for
landowners to engage in voluntary conservation on their land. But what if
ecological processes operate across property boundaries and land use decisions
on one property influence ecosystem functions on neighboring sites? This paper
examines how to account for such spatial externalities when designing
market-based conservation instruments. We use an agent-based model to analyze
different spatial metrics and their implications on land use decisions in a
dynamic cost environment. The model contains a number of alternative submodels
which differ in incentive design and social interactions of agents, the latter
including coordinating as well as cooperating behavior of agents. We find that
incentive design and social interactions have a strong influence on the spatial
allocation and the costs of the conservation market.


title: Mathematical Structure of Quantum Decision Theory

abstract:
  One of the most complex systems is the human brain whose formalized
functioning is characterized by decision theory. We present a "Quantum Decision
Theory" of decision making, based on the mathematical theory of separable
Hilbert spaces. This mathematical structure captures the effect of
superposition of composite prospects, including many incorporated intentions,
which allows us to explain a variety of interesting fallacies and anomalies
that have been reported to particularize the decision making of real human
beings. The theory describes entangled decision making, non-commutativity of
subsequent decisions, and intention interference of composite prospects. We
demonstrate how the violation of the Savage's sure-thing principle (disjunction
effect) can be explained as a result of the interference of intentions, when
making decisions under uncertainty. The conjunction fallacy is also explained
by the presence of the interference terms. We demonstrate that all known
anomalies and paradoxes, documented in the context of classical decision
theory, are reducible to just a few mathematical archetypes, all of which
finding straightforward explanations in the frame of the developed quantum
approach.


title: Complete Linear Series on a Hyperelliptic Curve

abstract:
  In this paper we study complete linear series on a hyperelliptic curve $C$ of
arithmetic genus $g$. Let $A$ be the unique line bundle on $C$ such that $|A|$
is a $g^1_2$, and let $\mathcal{L}$ be a line bundle on $C$ of degree $d$. Then
$\mathcal{L}$ can be factorized as $\mathcal{L} = A^m \otimes B$ where $m$ is
the largest integer satisfying $H^0 (C,\mathcal{L} \otimes A^{-m}) \neq 0$. Let
$b = {deg}(B)$. We say that \textit{the factorization type of} $\mathcal{L}$ is
$(m,b)$. Our main results in this paper assert that $(m,b)$ gives a precise
answer for many natural questions about $\mathcal{L}$.


title: Measurements of Unpolarized Azimuthal Asymmetries at COMPASS

abstract:
  Azimuthal Asymmetries in unpolarized SIDIS can be used to probe the
transverse momentum of quarks inside the nucleon. Furthermore, they give access
to the so-far unmeasured Boer-Mulders function. We report on the first
measurement of azimuthal asymmetries of the SIDIS cross section from scattering
of muons off a deuteron target.


title:
Importance of the crystalline symmetry in the piezoelectric properties
  of (K0.44+xNa0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3+x/2 lead-free ceramics

abstract:
  Lead-free ceramics (K0.44+xNa0.52Li0.04)(Nb0.86Ta0.10Sb0.04)O3+x/2 (x=-0,06)
were prepared by conventional solid state sintering. The results indicate a
correlation between crystalline symmetry and electrical properties. Higher
tetragonality was observed in samples with higher piezoelectric response. As
the tetragonality increase the presence of polymorphic phase decrease
associated with a reduction of the relaxor behaviour response. The ceramics
with c/a = 1.011 ratio exhibit enhanced electrical properties. The Raman
spectroscopy showed a certain asymmetry in the paraelectric phase above the
Curie temperature Tc that provokes retention of the polarization. The
crystalline symmetry plays a crucial role in the piezoelectric properties of
the system.


title: Inhomogeneous Quantum Quenches

abstract:
  We study the problem of a quantum quench in which the initial state is the
ground state of an inhomogeneous hamiltonian, in two different models,
conformal field theory and ordinary free field theory, which are known to
exhibit thermalisation of finite regions in the homogeneous case. We derive
general expressions for the evolution of the energy flow and correlation
functions, as well as the entanglement entropy in the conformal case.
Comparison of the results of the two approaches in the regime of their common
validity shows agreement up to a point further discussed. Unlike the thermal
analogue, the evolution in our problem is non-diffusive and can be physically
interpreted using an intuitive picture of quasiparticles emitted from the
initial time hypersurface and propagating semiclassically.

categories: cond-mat.stat-mech cond-mat.str-el hep-th math-ph math.MP


title: Foliations and Global Inversion

abstract:
  We consider topological conditions under which a locally invertible map
admits a global inverse. Our main theorem states that a local diffeomorphism
$f: M \to\mathbb{R}^n$ is bijective if and only if $H_{n-1}(M)=0$ and the
pre-image of every affine hyperplane is non-empty and acyclic. The proof is
based on some geometric constructions involving foliations and tools from
intersection theory. This topological result generalizes in finite dimensions
the classical analytic theorem of Hadamard-Plastock, including its recent
improvement by Nollet-Xavier. The main theorem also relates to a conjecture of
the aforementioned authors, involving the well known Jacobian Conjecture in
algebraic geometry.


title:
The effect of differential galactic winds on the chemical evolution of
  galaxies

abstract:
  (Abridged) The aim of this paper is to study the basic equations of the
chemical evolution of galaxies with gas flows. We focus on models in which the
outflow is differential, namely in which the heavy elements (or some of the
heavy elements) can leave the parent galaxy more easily than other chemical
species such as H and He. We study the chemical evolution of galaxies in the
framework of simple models. This allows us to solve analytically the equations
for the evolution of gas masses and metallicities. We find new analytical
solutions for various cases in which the effects of winds and infall are taken
into account. Differential galactic winds have the effect of reducing the
global metallicity of a galaxy, with the amount of reduction increasing with
the ejection efficiency of the metals. Abundance ratios are predicted to remain
constant throughout the whole evolution of the galaxy, even in the presence of
differential winds. One way to change them is by assuming differential winds
with different ejection efficiencies for different elements. However, simple
models apply only to elements produced on short timescales, namely all by Type
II SNe, and therefore large differences in the ejection efficiencies of
different metals are unlikely. Variations in abundance ratios such as [O/Fe] in
galaxies, without including the Fe production by Type Ia supernovae, can in
principle be obtained by assuming an unlikely different efficiency in the loss
of O relative to Fe from Type II supernovae. Therefore, we conclude that it is
not realistic to ignore Type Ia supernovae and that the delayed production of
some chemical elements relative to others (time-delay model) remains the most
plausible explanation for the evolution of alpha-elements relative to Fe.


title:
Field-Driven Domain-Wall Dynamics in GaMnAs Films with Perpendicular
  Anisotropy

abstract:
  We combine magneto-optical imaging and a magnetic field pulse technique to
study domain wall dynamics in a ferromagnetic (Ga,Mn)As layer with
perpendicular easy axis. Contrary to ultrathin metallic layers, the depinning
field is found to be smaller than the Walker field, thereby allowing for the
observation of the steady and precessional flow regimes. The domain wall width
and damping parameters are determined self-consistently. The damping, 30 times
larger than the one deduced from ferromagnetic resonance, is shown to
essentially originate from the non-conservation of the magnetization modulus.
An unpredicted damping resonance and a dissipation regime associated with the
existence of horizontal Bloch lines are also revealed.


title:
Scattering and binding of different atomic species in a one-dimensional
  optical lattice

abstract:
  The theory of scattering of atom pairs in a periodic potential is presented
for the case of different atoms. When the scattering dynamics is restricted to
the lowest Bloch band of the periodic potential, a separation in relative and
average discrete coordinates applies and makes the problem analytically
tractable, and we present a number of new results and features compared to the
case of identical atoms.


title:
A note on black hole masses estimated by the second moment in Narrow
  Line Seyfert 1 Galaxies

abstract:
  The second moment of the H$\beta$ emission line is calculated for 329 narrow
line Seyfert 1 galaxies (NLS1s) selected from the Sloan Digital Sky Survey
(SDSS), which is used to calculate the central supermassive black hole (SMBHs)
mass of each. We find that the second moment depends strongly on the broader
component of the H$\beta$ line profile. We find that for the NLS1s requiring
two Gaussians to fit the H$\beta$ line the mean value of the SMBH mass from the
H$\beta$ second moment is larger by about 0.50 dex than that from the full
width at half maximum (FWHM). Using the gas velocity dispersion of the
core/narrow component of \oiii $\lambda$ 5007 to estimate the stellar velocity
dispersion, $\sigma_{*}$, the new mass makes NLS1s fall very close to the $\mbh
- \sigma_{*}$ relation for normal AGNs. By using $\sigma_{*}$ measured directly
from SDSS spectra with a simple stellar population synthesis method, we find
that for NLS1s with mass lower than $10^7 \msun$, they fall only marginally
below the $\mbh - \sigma_{*}$ relation considering the large scatter in the
mass calculation.


title: Defining the Mean of a Real-Valued Function on an Arbitrary Metric Space

abstract:
  We show how a metric space induces a linear functional (a "mean") on
real-valued functions with domains in that metric space. This immediately
induces a "relative" measure on a collection of subsets of the underlying set.


title:
Existence and asymptotics of solutions of the Debye-Nernst-Planck system
  in R^2

abstract:
  In this paper we investigate a system describing electrically charged
particles in the whole space R^2. Our main goal is to describe large time
behavior of solutions which start their evolution from initial data of small
size. This is achieved using radially symmetric self-similar solutions.


title: Primary tunnel junction thermometry

abstract:
  We describe the concept and experimental demonstration of primary thermometry
based on a four probe measurement of a single tunnel junction embedded within
four arrays of junctions. We show that in this configuration random sample
specific and environment-related errors can be avoided. This method relates
temperature directly to Boltzmann constant, which will form the basis of the
definition of temperature and realization of official temperature scales in the
future.


title: Rational points on cubic hypersurfaces that split off a form

abstract:
  Let X be a projective cubic hypersurface of dimension 11 or more, which is
defined over the rationals. In this paper it is shown that X contains rational
points provided that the cubic form defining X can be written as the sum of two
forms that share no common variables.
  -----
  This paper features an appendix "Groupe de Brauer non ramifi\'e des
hypersurfaces cubiques singuli\`eres (d'apr\`es P. Salberger)", by J.-L.
Colliot-Th\'l\`ene.


title: Relativistic Doppler effect in a uniformly accelerated motion - III

abstract:
  In the context of special relativity, we describe with detail the Doppler
effect between a light source at rest and an observer in linear motion and
constant proper acceleration. To have an Englis version of this article, ask
the authors.
  -----
  ^Ce special-relativeco ni detale priskribas lum-Doppleran efikon inter
restanta fonto kaj observanto kun rektilinia movado kaj konstanta propra
akcelo.


title:
New CP phase of $B_s-\bar B_s$ mixing on ${\rm T}$ violation in
  $B_{d(s)}\to K^*(\phi) \ell^{+} \ell^{-}$

abstract:
  A large CP-violating phase uncovered recently by CDF and D$\O$ collaborations
in the time-dependent CP asymmetry (CPA) of the $B_s\to J/\Psi \phi$ decay
clearly indicates that a non-Cabibbo-Kobayashi-Maskawa (CKM) phase has to be
brought into the $b\to s$ transition. We find that the model with $SU(2)_L$
singlet exotic quarks can not only provide the new phase induced from the
Z-mediated flavor changing neutral current (FCNC) at tree level, but also
strongly relate the $B_s-\bar B_s$ mixing, $B_q\to V_q \ell^{+} \ell^{-}$
($V_{d[s]}=K^*[\phi])$ and $B_s\to \mu^{+} \mu^{-}$ together. In particular, we
show that the new CP phase can be unambiguously exposed by the large
statistical significances of $T$ violating observables in $B_q\to V_q \ell^{+}
\ell^{-}$, while the branching ratio of $B_s\to \mu^{+} \mu^{-}$ can be
enhanced to be $O(10^{-8})$.


title: Comment on "Is Faith the Enemy of Science?"

abstract:
  This comment was solicited by Physics in Canada and will appear alongside the
article by Richard Mackenzie [arXiv:0807.3670] in the next issue.


title:
VW LMi: tightest quadruple system known. Light-time effect and possible
  secular changes of orbits

abstract:
  Tightest known quadruple systems VW LMi consists of contact eclipsing binary
with P_12 = 0.477551 days and detached binary with P_34 = 7.93063 days
revolving in rather tight, 355.0-days orbit. This paper presents new
photometric and spectroscopic observations yielding 69 times of minima and 36
disentangled radial velocities for the component stars. All available radial
velocities and minima times are combined to better characterize the orbits and
to derive absolute parameters of components. The total mass of the quadruple
system was estimated at 4.56 M_sun. The detached, non-eclipsing binary with
orbital period P = 7.93 days is found to show apsidal motion with U
approximately 80 years. Precession period in this binary, caused by the
gravitational perturbation of the contact binary, is estimated to be about 120
years. The wide mutual orbit and orbit of the non-eclipsing pair are found to
be close to coplanarity, preventing any changes of the inclination angle of the
non-eclipsing orbit and excluding occurrence of the second system of eclipses
in future. Possibilities of astrometric solution and direct resolving of the
wide, mutual orbit are discussed. Nearby star, HD95606, was found to form loose
binary with quadruple system VW LMi.


title: Geant4 validation with CMS calorimeters test-beam data

abstract:
  CMS experiment is using Geant4 for Monte-Carlo simulation of the detector
setup. Validation of physics processes describing hadronic showers is a major
concern in view of getting a proper description of jets and missing energy for
signal and background events. This is done by carrying out an extensive studies
with test beam using the prototypes or real detector modules of the CMS
calorimeter. These data are matched with Geant4 predictions. Tuning of the
Geant4 models is carried out and steps to be used in reproducing detector
signals are defined in view of measurements of energy response, energy
resolution, transverse and longitudinal shower profiles for a variety of hadron
beams over a broad energy spectrum between 2 to 300 GeV/c.


title:
Cohomology of SL(2,C) character varieties of surface groups and the
  action of the Torelli group

abstract:
  We determine the action of the Torelli group on the equivariant cohomology of
the space of flat SL(2,C) connections on a closed Riemann surface. We show that
the trivial part of the action contains the equivariant cohomology of the even
component of the space of flat PSL(2,C) connections. The non-trivial part
consists of the even alternating products of degree two Prym representations,
so that the kernel of the action is precisely the Prym-Torelli group. We
compute the Betti numbers of the ordinary cohomology of the moduli space of
flat SL(2,C) connections. Using results of Cappell-Lee-Miller we show that the
Prym-Torelli group, which acts trivially on equivariant cohomology, acts
non-trivially on ordinary cohomology.


title:
GHASP : An Halpha kinematic survey of 203 spiral and irregular galaxies
  - VII. Revisiting the analysis of Halpha data cubes for 97 galaxies

abstract:
  The GHASP survey (Gassendi HAlpha survey of SPirals) consists of 3D Ha data
cubes for 203 spiral and irregular galaxies, covering a large range in
morphological types and absolute magnitudes, for kinematics analysis. It is the
largest sample of Fabry-Perot data published up to now. In order to provide an
homogenous sample, reduced and analyzed using the same procedure, we present in
this paper the new reduction and analysis for a set of 97 galaxies already
published in previous papers but now using the new data reduction procedure
adopted for the whole sample. The GHASP survey is now achieved and the whole
sample is reduced using adaptive binning techniques based on Voronoi
tessellations. We have derived Ha data cubes from which are computed Ha maps,
radial velocity fields as well as residual velocity fields, position-velocity
diagrams, rotation curves and kinematical parameters for almost all galaxies.
The rotation curves, the kinematical parameters and their uncertainties are
computed homogeneously using the new method based on the power spectrum of the
residual velocity field. This paper provides the kinematical parameters for the
whole sample. For the first time, the integrated Ha profiles have been computed
and are presented for the whole sample. The total Ha fluxes deduced from these
profiles have been used in order to provide a flux calibration for the 203
GHASP galaxies. This paper confirms the conclusions already drawn from half the
sample concerning (i) the increased accuracy of position angles measurements
using kinematical data, (ii) the difficulty to have robust determinations of
both morphological and kinematical inclinations in particular for low
inclination galaxies and (iii) the very good agreement between the Tully-Fisher
relationship derived from our data and previous determinations.


title: Uniformly Hyperbolic Finite-Valued SL(2,R)-Cocycles

abstract:
  We consider finite families of SL(2,R) matrices whose products display
uniform exponential growth. These form open subsets of (SL(2,R))^N, and we
study their components, boundary, and complement. We also consider the more
general situation where the allowed products of matrices satisfy a Markovian
rule.


title: Shaping opinions in a social network

abstract:
  We hereby propose a model of opinion dynamics where individuals update their
beliefs because of interactions in acquaintances' group. The model exhibit a
non trivial behavior that we discuss as a function of the main involved
parameters. Results are reported on the average number of opinion clusters and
the time needed to form such clusters.


title:
Theorem of completeness for a Dirac-type operator with generalized
  $\lambda$-depending boundary conditions

abstract:
  A completeness theorem is proved involving a system of integro-differential
equations with some $\lambda$-depending boundary conditions. Also some
sufficient conditions for the root functions to form a Riesz basis are
established.


title: Status of Constraints on Supersymmetry

abstract:
  A short summary of constraints on the parameter space of supersymmetric
models is given. Experimental limits from high energy colliders, electroweak
precision data, flavor and Higgs physics, and cosmology are considered. The
main focus is on the MSSM with conserved R- and CP-parity and minimal flavor
violation, but more general scenarios and extended models will also be
discussed briefly.


title:
PYRAMIR: Calibration and operation of a pyramid near-infrared wavefront
  sensor

abstract:
  The concept of pyramid wavefront sensors (PWFS) has been around about a
decade by now. However, there is still a great lack of characterizing
measurements that allow the best operation of such a system under real life
conditions at an astronomical telescope. In this article we, therefore,
investigate the behavior and robustness of the pyramid infrared wavefront
sensor PYRAMIR mounted at the 3.5 m telescope at the Calar Alto Observatory
under the influence of different error sources both intrinsic to the sensor,
and arising in the preceding optical system. The intrinsic errors include
diffraction effects on the pyramid edges and detector read out noise. The
external imperfections consist of a Gaussian profile in the intensity
distribution in the pupil plane during calibration, the effect of an optically
resolved reference source, and noncommon-path aberrations. We investigated the
effect of three differently sized reference sources on the calibration of the
PWFS. For the noncommon-path aberrations the quality of the response of the
system is quantified in terms of modal cross talk and aliasing. We investigate
the special behavior of the system regarding tip-tilt control. From our
measurements we derive the method to optimize the calibration procedure and the
setup of a PWFS adaptive optics (AO) system. We also calculate the total
wavefront error arising from aliasing, modal cross talk, measurement error, and
fitting error in order to optimize the number of calibrated modes for on-sky
operations. These measurements result in a prediction of on-sky performance for
various conditions.