title: Disks around Brown Dwarfs in the Sigma Orionis Cluster

abstract:
  We have performed a census of disks around brown dwarfs in the Sigma Ori
cluster using all available images from IRAC onboard the Spitzer Space
Telescope. To search for new low-mass cluster members with disks, we have
measured photometry for all sources in the Spitzer images and have identified
the ones that have red colors that are indicative of disks. We present 5
promising candidates, which may consist of 2 brown dwarfs, 2 stars with edge-on
disks, and a low-mass protostar if they are bona fide members. Spectroscopy is
needed to verify the nature of these sources. We have also used the Spitzer
data to determine which of the previously known probable members of Sigma Ori
are likely to have disks. By doing so, we measure disk fractions of ~40% and
~60% for low-mass stars and brown dwarfs, respectively. These results are
similar to previous estimates of disk fractions in IC 348 and Cha I, which have
roughly the same median ages as Sigma Ori (3 Myr). Finally, we note that our
photometric measurements and the sources that we identify as having disks
differ significantly from those of other recent studies that analyzed the same
Spitzer images. For instance, previous work has suggested that the T dwarf S
Ori 70 is redder than typical field dwarfs, which has been cited as possible
evidence of youth and cluster membership. However, we find that this object is
only slightly redder than the reddest field dwarfs in [3.6]-[4.5] (1.56+/-0.07
vs. 0.93-1.46). We measure a larger excess in [3.6]-[5.8] (1.75+/-0.21 vs.
0.87-1.19), but the flux at 5.8um may be overestimated because of the low
signal-to-noise ratio of the detection. Thus, the Spitzer data do not offer
strong evidence of youth and membership for this object, which is the faintest
and coolest candidate member of Sigma Ori that has been identified to date.


title:
Dark Stars: Dark Matter in the First Stars leads to a New Phase of
  Stellar Evolution

abstract:
  The first phase of stellar evolution in the history of the universe may be
Dark Stars, powered by dark matter heating rather than by fusion. Weakly
interacting massive particles, which are their own antiparticles, can
annihilate and provide an important heat source for the first stars in the the
universe. This talk presents the story of these Dark Stars. We make predictions
that the first stars are very massive ($\sim 800 M_\odot$), cool (6000 K),
bright ($\sim 10^6 L_\odot$), long-lived ($\sim 10^6$ years), and probable
precursors to (otherwise unexplained) supermassive black holes. Later, once the
initial DM fuel runs out and fusion sets in, DM annihilation can predominate
again if the scattering cross section is strong enough, so that a Dark Star is
born again.


title: Anomalous Emission from HII regions

abstract:
  Spinning dust appears to be the best explanation for the anomalous emission
that has been observed at $\sim 10-60$ GHz. One of the best examples of
spinning dust comes from a HII region in the Perseus molecular cloud.
Observations of other HII regions also show tentative evidence for excess
emission at frequencies $\sim 30$ GHz, although at lower emissivity levels. A
new detection of excess emission at 31 GHz in the HII region RCW175 has been
made. The most plausible explanation again comes from spinning dust. HII
regions are a good place to look for spinning dust as long as accurate radio
data spanning the $\sim 5-100$ GHz range is available.


title:
Tellurium substitution effect on superconductivity of the alpha-phase
  Iron Selenide

abstract:
  We have carried out a systematic study of the PbO-type compound
FeSe_{1-x}Te_x (x = 0~1), where Te substitution effect on superconductivity is
investigated. It is found that superconducting transition temperature reaches a
maximum of Tc=15.2K at about 50% Te substitution. The pressure-enhanced Tc of
FeSe0.5Te0.5 is more than 10 times larger than that of FeSe. Interestingly,
FeTe is no longer superconducting. A low temperature structural distortion
changes FeTe from triclinic symmetry to orthorhombic symmetry. We believe that
this structural change breaks the magnetic symmetry and suppresses
superconductivity in FeTe.


title: Thin Shell Dynamics and Equations of State

abstract:
  A relation between stress-energy and motion is derived for accelerated Israel
layers. The relation, for layers between two Schwarzschild manifolds,
generalizes the equation of state for geodesic collapse. A set of linked layers
is discussed.


title:
Analysis of the spectral function of Nd1.85Ce0.15CuO4, obtained by angle
  resolved photoemission spectroscopy

abstract:
  Samples of Nd(2-x)Ce(x)CuO(4), an electron-doped high temperature
superconducting cuprate (HTSC), near optimal doping at x = 0.155 were measured
via angle resolved photoemission (ARPES). We report a renormalization feature
in the self energy ("kink") in the band dispersion at 50 - 60 meV present in
nodal and antinodal cuts across the Fermi surface. Specifically, while the kink
had previously only been seen in the antinodal region, it is now observed also
in the nodal region, reminiscent of what has been observed in hole-doped
cuprates.


title:
Measuring the Higgs-Vector boson Couplings at Linear $e^{+} e^{-}$
  Collider

abstract:
  We estimate the accuracy with which the coefficient of the CP even dimension
six operators involving Higgs and two vector bosons (HVV) can be measured at
linear $e^+ e^-$ colliders. Using the optimal observables method for the
kinematic distributions, our analysis is based on the five different processes.
First is the WW fusion process in the t-channel ($e^+e^- \to \bar{\nu}_e \nu_e
H$), where we use the rapidity y and the transverse momentum $\pT$ of the Higgs
boson as observables. Second is the ZH pair production process in the
s-channel, where we use the scattering angle of the Z and the Z decay angular
distributions, reproducing the results of the previous studies. Third is the
t-channel ZZ, fusion processes ($e^+e^- \to e^+e^ -H$), where we use the energy
and angular distributions of the tagged $e^+$ and $e^-$. In the fourth, we
consider the rapidity distribution of the untagged $e^+e^-H$ events, which can
be approximated well as the $\gamma \gamma$ fusion of the bremsstrahlung
photons from $e^+$ and $e^-$ beams. As the last process,we consider the single
tagged $e^+e^- H$ events, which probe the $\gamma e^{\pm} \to H e^{\pm}$
process. All the results are presented in such a way that statistical errors of
the constraints on the effective couplings and their correlations are read off
when all of them are allowed to vary simultaneously, for each of the above
processes, for $m_H=120 $ GeV, at $\sqrt{s}=250\GEV$, $350\GEV$ $500\GEV$ and
$1\TEV$, with and without $e^-$ beam polarization of 80%.


title:
Description of the Giant Monopole Resonance in the Even-A $^{112-124}$Sn
  Isotopes within the Microscopic Model Including Quasiparticle-Phonon Coupling

abstract:
  We have calculated the strength distributions of the giant monopole resonance
in the even-A tin isotopes (A = 112-124) which were recently measured in
inelastic $\alpha$-scattering. The calculations were performed within two
microscopic models: the quasiparticle random phase approximation (QRPA) and the
quasiparticle time blocking approximation which is an extension of the QRPA
including quasiparticle-phonon coupling. We used a self-consistent
calculational scheme based on the HF+BCS approximation. The single-particle
continuum was exactly included on the RPA level. The self-consistent mean field
and the effective interaction were derived from the Skyrme energy functional.
In the calculations, two Skyrme force parametrizations were used. The T5
parametrization with comparatively low value of the incompressibility of
infinite nuclear matter ($K_{\infty}$ = 202 MeV) gives theoretical results in
good agreement with the experimental data including the resonance widths.


title:
Dynamics of a one-dimensional spinor Bose liquid: a phenomenological
  approach

abstract:
  The ground state of a spinor Bose liquid is ferromagnetic, while the softest
excitation above the ground state is the magnon mode. The dispersion relation
of the magnon in a one-dimensional liquid is periodic in the wavenumber q with
the period 2\pi n, determined by the density n of the liquid. Dynamic
correlation functions, such as e.g. spin-spin correlation function, exhibit
power-law singularities at the magnon spectrum, $\omega\to\omega_m(q,n)$.
Without using any specific model of the inter-particle interactions, we relate
the corresponding exponents to independently measurable quantities
$\partial\omega_m/\partial q$ and $\partial\omega_m/\partial n$.


title:
Force Dependent Hopping Rates of RNA Hairpins can be Estimated from
  Accurate Measurement of the Folding Landscapes

abstract:
  The sequence-dependent folding landscapes of nucleic acid hairpins reflect
much of the complexity of biomolecular folding. Folding trajectories, generated
using single molecule force clamp experiments by attaching semiflexible
polymers to the ends of hairpins have been used to infer their folding
landscapes. Using simulations and theory, we study the effect of the dynamics
of the attached handles on the handle-free RNA free energy profile
$F^o_{eq}(z_m)$, where $z_m$ is the molecular extension of the hairpin.
Accurate measurements of $F^o_{eq}(z_m)$ requires stiff polymers with small
$L/l_p$, where $L$ is the contour length of the handle, and $l_p$ is the
persistence length. Paradoxically, reliable estimates of the hopping rates can
only be made using flexible handles. Nevertheless, we show that the equilibrium
free energy profile $F^o_{eq}(z_m)$ at an external tension $f_m$, the force
($f$) at which the folded and unfolded states are equally populated, in
conjunction with Kramers' theory, can provide accurate estimates of the
force-dependent hopping rates in the absence of handles at arbitrary values of
$f$. Our theoretical framework shows that $z_m$ is a good reaction coordinate
for nucleic acid hairpins under tension.


title:
Physical conditions in nearby active galaxies correlated with
  ultra-high-energy cosmic rays detected by the Pierre Auger Observatory

abstract:
  We analyze the active-galaxy correlation reported in 2007 by the Pierre Auger
Collaboration. The signal diminishes if the correlation-function approach
(counting all "source-event" pairs and not only "nearest neighbours") is used,
suggesting that the correlation may reveal individual sources and not their
population. We analyze available data on physical conditions in these
individual correlated sources and conclude that acceleration of protons to the
observed energies is hardly possible in any of these galaxies, while heavier
nuclei would be deflected by the Galactic magnetic field thus spoiling the
correlation. Our results question the Auger interpretation of the reported
anisotropy signal but do not contradict to its explanation with
intermediate-mass nuclei accelerated in Cen A.


title: Hyperons in Two Flavor Chiral Perturbation Theory

abstract:
  We use two-flavor chiral perturbation theory to describe hyperons. We focus
on the strangeness conserving sector, and, as an example, calculate hyperon
masses. Convergence of this two-flavor chiral expansion for observables is
improved over the three-flavor theory. The cost, however, is a larger number of
low-energy constants that must be ultimately determined from lattice QCD data.
A formula for the mass of the omega baryon is derived to sixth order in this
expansion, and will aid lattice practitioners in scale setting or tuning the
strange quark mass.


title: Symplectic Integrator Mercury: Bug Report

abstract:
  We report on a problem found in MERCURY, a hybrid symplectic integrator used
for dynamical problems in Astronomy. The variable that keeps track of bodies'
statuses is uninitialised, which can result in bodies disappearing from
simulations in a non-physical manner. Some FORTRAN compilers implicitly
initialise variables, preventing simulations from having this problem. With
other compilers, simulations with a suitably large maximum number of bodies
parameter value are also unaffected. Otherwise, the problem manifests at the
first event after the integrator is started, whether from scratch or continuing
a previously stopped simulation. Although the problem does not manifest in some
conditions, explicitly initialising the variable solves the problem in a
permanent and unconditional manner.


title: PHENIX Results on Jet Correlations versus Reaction Plane

abstract:
  In relativistic heavy-ion collisions, studying jet correlations and their
dependence on the angle of emission with respect to the reaction plane can be
used to shed light on the path length dependence of the energy lost by the jet.
In this paper, we present recent PHENIX results on jet correlations versus
reaction plane, as a function of centrality and transverse momentum.


title: Spectral duality for a class of unbounded operators

abstract:
  We establish a spectral duality for certain unbounded operators in Hilbert
space. The class of operators includes discrete graph Laplacians arising from
infinite weighted graphs. The problem in this context is to establish a
practical approximation of infinite models with suitable sequences of finite
models which in turn allow (relatively) easy computations.
  Let $X$ be an infinite set and let $\H$ be a Hilbert space of functions on
$X$ with inner product $\ip{\cdot}{\cdot}=\ip{\cdot}{\cdot}_{\H}$. We will be
assuming that the Dirac masses $\delta_x$, for $x\in X$, are contained in $\H$.
And we then define an associated operator $\Delta$ in $\H$ given by $$(\Delta
v)(x):=\ip{\delta_x}{v}_{\H}.$$ Similarly, for every finite subset $F\subset
X$, we get an operator $\Delta_F$.
  If $F_1\subset F_2\subset...$ is an ascending sequence of finite subsets such
that $\cup_{k\in\bn}F_k=X$, we are interested in the following two problems:
  (a) obtaining an approximation formula
$$\lim_{k\to\infty}\Delta_{F_k}=\Delta;$$ and
  (b) establish a computational spectral analysis for the truncated operators
$\Delta_F$ in (a).


title: Special comparison theorem for the Dirac equation

abstract:
  If a central vector potential V(r,a) in the Dirac equation is monotone in a
parameter 'a', then a discrete eigenvalue E(a) is monotone in 'a'. For such a
special class of comparisons, this generalizes an earlier comparison theorem
that was restricted to node free states. Moreover, the present theorem applies
to every discrete eigenvalue.


title:
A Multivariate Fast Discrete Walsh Transform with an Application to
  Function Interpolation

abstract:
  For high dimensional problems, such as approximation and integration, one
cannot afford to sample on a grid because of the curse of dimensionality. An
attractive alternative is to sample on a low discrepancy set, such as an
integration lattice or a digital net. This article introduces a multivariate
fast discrete Walsh transform for data sampled on a digital net that requires
only $O(N \log N)$ operations, where $N$ is the number of data points. This
algorithm and its inverse are digital analogs of multivariate fast Fourier
transforms.
  This fast discrete Walsh transform and its inverse may be used to approximate
the Walsh coefficients of a function and then construct a spline interpolant of
the function. This interpolant may then be used to estimate the function's
effective dimension, an important concept in the theory of numerical
multivariate integration. Numerical results for various functions are
presented.


title:
Klein Backscattering and Fabry-Perot Interference in Graphene
  Heterojunctions

abstract:
  We present a theory of quantum-coherent transport through a lateral p-n-p
structure in graphene, which fully accounts for the interference of forward and
backward scattering on the p-n interfaces. The backreflection amplitude changes
sign at zero incidence angle because of the Klein phenomenon, adding a phase
$\pi$ to the interference fringes. The contributions of the two p-n interfaces
to the phase of the interference cancel with each other at zero magnetic field,
but become imbalanced at a finite field. The resulting half a period shift in
the Fabry-Perot fringe pattern, induced by a relatively weak magnetic field,
can provide a clear signature of Klein scattering in graphene. This effect is
shown to be robust in the presence of spatially inhomogeneous potential of
moderate strength.


title: A new approach to the star-genvalue equation

abstract:
  We show that the eigenvalues and eigenfunctions of the stargenvalue equation
can be completely expressed in terms of the corresponding eigenvalue problem
for the quantum Hamiltonian. Our method makes use of a Weyl-type representation
of the star-product and of the properties of the cross-Wigner transform, which
appears as an intertwining operator.


title:
Thermal Right-Handed Sneutrino Dark Matter in the F_D-Term Model of
  Hybrid Inflation

abstract:
  We compute the relic abundance of the right-handed sneutrinos in the
supersymmetric F_D-term model of hybrid inflation. As well as providing a
natural solution to the mu- and gravitino overabundance problems, the F_D-term
model offers a new viable candidate to account for the cold dark matter in the
Universe: the lightest right-handed sneutrino. In particular, the F_D-term
model predicts a new quartic coupling of purely right-handed sneutrinos to the
Higgs doublets that thermalizes the sneutrinos and makes them annihilate
sufficiently fast to a level compatible with the current cosmic microwave
background data. We analyze this scenario in detail and identify favourable
regions of the parameter space within the framework of minimal supergravity,
for which the lightest right-handed sneutrino becomes the thermal dark matter,
in agreement with WMAP observations of cosmological inflation. Constraints
derived from direct dark matter searches experiments are presented.


title: Generalized unitarity for N=4 super-amplitudes

abstract:
  We develop a manifestly supersymmetric version of the generalized unitarity
cut method for calculating scattering amplitudes in N=4 SYM theory. We
illustrate the power of this method by computing the one-loop n-point NMHV
super-amplitudes. The result confirms two conjectures which we made in
arXiv:0807.1095 [hep-th]. Firstly, we derive the compact, manifestly dual
superconformally covariant form of the NMHV tree amplitudes for arbitrary
number and types of external particles. Secondly, we show that the ratio of the
one-loop NMHV to the MHV amplitude is dual conformal invariant.


title:
Local structures of polar wurtzites Zn_{1-x}Mg_{x}O studied by Raman and
  {67}Zn/{25}Mg NMR spectroscopies and by total neutron scattering

abstract:
  Local compositions and structures of Zn_{1-x}Mg_{x}O alloys have been
investigated by Raman and solid-state {67}Zn/{25}Mg nuclear magnetic resonance
(NMR) spectroscopies, and by neutron pair-distribution-function (PDF) analyses.
The E2(low) and E2(high) Raman modes of Zn_{1-x}Mg_{x}O display Gaussian- and
Lorentzian-type profiles, respectively. At higher Mg substitutions, both modes
become broader, while their peak positions shift in opposite directions. The
evolution of Raman spectra from Zn_{1-x}Mg_{x}O solid solutions are discussed
in terms of lattice deformation associated with the distinct coordination
preferences of Zn and Mg. Solid-state magic-angle-spinning (MAS) NMR studies
suggest that the local electronic environments of {67}Zn in ZnO are only weakly
modified by the 15% substitution of Mg for Zn. {25}Mg MAS spectra of
Zn_{0.85}Mg_{0.15}O show an unusual upfield shift, demonstrating the prominent
shielding ability of Zn in the nearby oxidic coordination sphere. Neutron PDF
analyses of Zn_{0.875}Mg_{0.125}O using a 2x2x1 supercell corresponding to
Zn_{7}MgO_{8} suggest that the mean local geometry of MgO_{4} fragments concurs
with previous density functional theory (DFT)-based structural relaxations of
hexagonal wurtzite MgO. MgO_{4} tetrahedra are markedly compressed along their
c-axes and are smaller in volume than ZnO_{4} units by ~6%. Mg atoms in
Zn_{1-x}Mg_{x}O have a shorter bond to the $c$-axial oxygen atom than to the
three lateral oxygen atoms, which is distinct from the coordination of Zn. The
precise structure, both local and average, of Zn_{0.875}Mg_{0.125}O obtained
from time-of-flight total neutron scattering supports the view that
Mg-substitution in ZnO results in increased total spontaneous polarization.


title:
The dust un-biased cosmic star formation history from the 20 cm
  VLA-COSMOS survey

abstract:
  We derive the cosmic star formation history (CSFH) out to z=1.3 using a
sample of ~350 radio-selected star-forming galaxies, a far larger sample than
in previous, similar studies. We attempt to differentiate between radio
emission from AGN and star-forming galaxies, and determine an evolving 1.4 GHz
luminosity function based on these VLA-COSMOS star forming galaxies. We
precisely measure the high-luminosity end of the star forming galaxy luminosity
function (SFR>100 M_Sol/yr; equivalent to ULIRGs) out to z=1.3, finding a
somewhat slower evolution than previously derived from mid-infrared data. We
find that more stars are forming in luminous starbursts at high redshift. We
use extrapolations based on the local radio galaxy luminosity function;
assuming pure luminosity evolution, we derive $L_* \propto (1+z)^{2.1 \pm 0.2}$
or $L_* \propto (1+z)^{2.5 \pm 0.1}$, depending on the choice of the local
radio galaxy luminosity function. Thus, our radio-derived results independently
confirm the ~1 order of magnitude decline in the CSFH since z~1.


title:
Simulations of AGN feedback in galaxy clusters and groups: impact on gas
  fractions and the Lx-T scaling relation

abstract:
  Recently, rapid observational and theoretical progress has established that
black holes (BHs) play a decisive role in the formation and evolution of
individual galaxies as well as galaxy groups and clusters. In particular, there
is compelling evidence that BHs vigorously interact with their surroundings in
the central regions of galaxy clusters, indicating that any realistic model of
cluster formation needs to account for these processes. This is also suggested
by the failure of previous generations of hydrodynamical simulations without BH
physics to simultaneously account for the paucity of strong cooling flows in
clusters, the slope and amplitude of the observed cluster scaling relations,
and the high-luminosity cut-off of central cluster galaxies. Here we use
high-resolution cosmological simulations of a large cluster and group sample to
study how BHs affect their host systems. We focus on two specific properties,
the halo gas fraction and the X-ray luminosity-temperature scaling relation,
both of which are notoriously difficult to reproduce in self-consistent
hydrodynamical simulations. We show that BH feedback can solve both of these
issues, bringing them in excellent agreement with observations, without
alluding to the `cooling only' solution that produces unphysically bright
central galaxies. By comparing a large sample of simulated AGN-heated clusters
with observations, our new simulation technique should make it possible to
reliably calibrate observational biases in cluster surveys, thereby enabling
various high-precision cosmological studies of the dark matter and dark energy
content of the universe.


title:
Imaging bond order near non-magnetic impurities in square lattice
  antiferromagnets

abstract:
  We study the textures of generalized "charge densities" (scalar objects
invariant under time reversal), in the vicinity of non-magnetic impurities in
square-lattice quantum anti-ferromagnets, by order parameter field theories.
Our central finding is the structure of the "vortex" in the generalized density
wave order parameter centered at the non-magnetic impurity. Using exact
numerical data from quantum Monte Carlo simulations on an antiferromagnetic
spin model, we are able to verify the results of our field theoretic study. We
extend our phenomenological approach to the period-4 bond-centered density wave
found in the underdoped cuprates.


title: Edge and impurity response in two-dimensional quantum antiferromagnets

abstract:
  Motivated by recent Monte-Carlo simulations of Hoglund and Sandvik
(arXiv:0808.0408), we study edge response in square lattice quantum
antiferromagnets. We use the O(3) non-linear sigma-model to compute the decay
asymptotics of the staggered magnetization, energy density and local magnetic
susceptibility away from the edge. We find that the total edge susceptibility
is negative and diverges logarithmically as the temperature vanishes. We
confirm the predictions of the continuum theory by performing a 1/S expansion
of the microscopic Heisenberg model with the edge. We propose a qualitative
explanation of the edge dimerization seen in Monte-Carlo simulations by a
theory of valence-bond-solid correlations in the Neel state. We also discuss
the extension of the latter theory to the response of a single non-magnetic
impurity, and its connection to the theory of the deconfined critical point.


title: Dijet signals for low mass strings at the LHC

abstract:
  We consider extensions of the standard model based on open strings ending on
D-branes, with gauge bosons due to strings attached to stacks of D-branes and
chiral matter due to strings stretching between intersecting D-branes. Assuming
that the fundamental string mass scale is in the TeV range and the theory is
weakly coupled, we discuss possible signals of string physics at the Large
Hadron Collider (LHC). In such D-brane constructions, the dominant
contributions to full-fledged string amplitudes for all the common QCD parton
subprocesses leading to dijets are completely independent of the details of
compactification, and can be evaluated in a parameter-free manner. We make use
of these amplitudes evaluated near the first resonant pole to determine the
discovery potential of LHC for the first Regge excitations of the quark and
gluon. Remarkably, the reach of LHC after a few years of running can be as high
as 6.8 TeV. Even after the first 100 pb^{-1} of integrated luminosity, string
scales as high as 4.0 TeV can be discovered. For string scales as high as 5.0
TeV, observations of resonant structures in pp \to {\rm direct} \gamma + jet
can provide interesting corroboration for string physics at the TeV-scale.


title: Dynamical effects of the long bar in the Milky Way

abstract:
  We examine the dynamical effects on disk stars of a "long bar" in the Milky
Way by inserting a triaxial rotating bar into an axisymmetric disk+bulge+dark
halo potential and integrating 3-D orbits of 104 tracer stars over a period of
2 Gyr. The long bar has been detected via "clump giants" in the IR by
Lopez-Corredoira et al. (2007), and is estimated to have semi-major axes of
(3.9 : 0.6 : 0.1) kpc and a mass of 6 10^9 Msun. We find such a structure has a
slight impact on the inner disk-system, moving tracers near to the bar into the
bar-region, as well as into the bulge. These effects are under continuing
study.


title: Interferometric probe of paired states

abstract:
  We propose a new method for detecting paired states in either bosonic or
fermionic systems using interference experiments with independent or weakly
coupled low dimensional systems. We demonstrate that our method can be used to
detect both the FFLO and the d-wave paired states of fermions, as well as
quasicondensates of singlet pairs for polar F=1 atoms in two dimensional
systems. We discuss how this method can be used to perform phase-sensitive
determination of the symmetry of the pairing amplitude.


title: Superconformal Chern-Simons Theories and the Squashed Seven Sphere

abstract:
  We show that there are two supersymmetric completions of the
three-dimensional Chern-Simons theory of level k with gauge group U(N)xU(N)
coupled to four sets of massless scalars and spinors in the bi-fundamental
representation, if we require Sp(2) global symmetry with the matter fields in
the fundamental representation of SU(4). One is the N=6 superconformal theory
recently studied in arXiv:0806.1218 [hep-th] and another is a new theory with
N=1 superconformal symmetry. We conjecture that the N=1 theory is dual to M
theory on AdS_4 x Squashed S^7/Z_k.


title: I-V curves of Fe/MgO (001) single- and double-barrier tunnel junctions

abstract:
  In this work, we calculate with ab initio methods the current-voltage
characteristics for ideal single- and double-barrier Fe/MgO (001) magnetic
tunnel junctions. The current is calculated in the phase-coherent limit by
using the recently developed SMEAGOL code, combining the nonequilibrium Green
function formalism with density-functional theory. In general we find that
double-barrier junctions display a larger magnetoresistance, which decays with
bias at a slower pace than their single-barrier counterparts. This is explained
in terms of enhanced spin filtering from the middle Fe layer sandwiched in
between the two MgO barriers. In addition, for double-barrier tunnel junctions,
we find a well defined peak in the magnetoresistance at a voltage of V=0.1 V.
This is the signature of resonant tunneling across a majority quantum well
state. Our findings are discussed in relation to recent experiments.


title: Highly Conducting Graphene Sheets and Langmuir-Blodgett Films

abstract:
  Graphene is an intriguing material with properties that are distinct from
those of other graphitic systems. The first samples of pristine graphene were
obtained by peeling off and epitaxial growth. Recently, the chemical reduction
of graphite oxide was used to produce covalently functionalized single-layer
graphene oxide. However, chemical approaches for the large-scale production of
highly conducting graphene sheets remain elusive. Here, we report that the
exfoliation-reintercalation-expansion of graphite can produce high-quality
single-layer graphene sheets stably suspended in organic solvents. The graphene
sheets exhibit high electrical conductance at room and cryogenic temperatures.
Large amounts of graphene sheets in organic solvents are made into large
transparent conducting films by Langmuir-Blodgett assembly in a layer-by-layer
manner. The chemically derived high quality graphene sheets could lead to
future scalable graphene devices.


title: Searching for Superhorizon Fluctuations in Heavy-Ion Collisions

abstract:
  In this talk I discuss novel explanations for the azimuthal correlations
observed in heavy-ion collisions. I review some ideas about correlations and
the evolution of heavy-ion collisions. Some aspects of the correlations
observed in heavy-ion collisions may be indicitive of the suppression of
super-horizon fluctuations.


title: On-Shell Recursion Relations for Generic Theories

abstract:
  We show that on-shell recursion relations hold for tree amplitudes in generic
two derivative theories of multiple particle species and diverse spins. For
example, in a gauge theory coupled to scalars and fermions, any amplitude with
at least one gluon obeys a recursion relation. In (super)gravity coupled to
scalars and fermions, the same holds for any amplitude with at least one
graviton. This result pertains to a broad class of theories, including QCD, N=4
SYM, and N=8 supergravity.


title:
Derivation of the two dimensional nonlinear Schrodinger equation from
  many body quantum dynamics

abstract:
  We derive rigorously, for both R^2 and [-L, L]^2, the cubic nonlinear
Schrodinger equation in a suitable scaling limit from the two-dimensional
many-body Bose systems with short-scale repulsive pair interactions. We first
prove convergence of the solution of the BBGKY hierarchy, corresponding to the
many-body systems, to a solution of the infinite Gross-Pitaevskii hierarchy,
corresponding to the cubic NLS; and then we prove uniqueness for the infinite
hierarchy, which requires number-theoretical techniques in the periodic case.


title: A Simple Proof of the Chiral Gravity Conjecture

abstract:
  Chiral gravity is three-dimensional asymptotically AdS3 gravity with an
Einstein, cosmological, and Chern-Simons term at a critical value of the
coupling denoted \mu\ell=1. Ordinarily, excitations of AdS3 gravity are known
to transform non-trivially under an asymptotic symmetry group consisting of
both a left-moving and a right-moving conformal group. However it was recently
conjectured in arXiv:0801.4566 that at the chiral point \mu\ell=1 all
excitations are chiral in that they transform only under the right-moving
conformal group. We show herein that at the chiral point, the group of trivial
diffeomorphisms is enhanced to include the left-moving conformal
transformations, and the asymptotic symmetry group contains only one
(right-moving) copy of the conformal group. Diffeomorphism invariance then
requires that all physical excitations are annihilated by left-moving conformal
transformations, establishing nonperturbatively the chiral nature of chiral
gravity.


title: The Mass of the Black Hole in the Quasar PG 2130+099

abstract:
  We present the results of a recent reverberation-mapping campaign undertaken
to improve measurements of the radius of the broad line region and the central
black hole mass of the quasar PG 2130+099. Cross correlation of the 5100
angstrom continuum and H-beta emission-line light curves yields a time lag of
22.9 (+4.4 - 4.3) days, corresponding to a central black hole mass MBH= 3.8
(+/- 1.5) x 10^7 Msun. This value supports the notion that previous
measurements yielded an incorrect lag. We re-analyzed previous datasets to
investigate the possible sources of the discrepancy and conclude that previous
measurement errors were apparently caused by a combination of undersampling of
the light curves and long-term secular changes in the H-beta emission-line
equivalent width. With our new measurements, PG 2130+099 is no longer an
outlier in either the R-L or the MBH-Sigma relationships.


title: Neutralino Dark Matter as the Source of the WMAP Haze

abstract:
  Previously, it has been argued that the anomalous emission from the region
around the Galactic Center observed by WMAP, known as the ``WMAP Haze'', may be
the synchrotron emission from relativistic electrons and positrons produced in
dark matter annihilations. In particular, the angular distribution, spectrum,
and intensity of the observed emission are consistent with the signal expected
to result from a WIMP with an electroweak-scale mass and an annihilation cross
section near the value predicted for a thermal relic. In this article, we
revisit this signal within the context of supersymmetry, and evaluate the
parameter space of the Constrained Minimal Supersymmetric Standard Model
(CMSSM). We find that, over much of the supersymmetric parameter space, the
lightest neutralino is predicted to possess the properties required to generate
the WMAP Haze. In particular, the focus point, A-funnel, and bulk regions
typically predict a neutralino with a mass, annihilation cross section, and
dominant annihilation modes which are within the range required to produce the
observed features of the WMAP Haze. The stau-coannihilation region, in
contrast, is disfavored as an explanation for the origin of this signal.


title: Evolving Clustered Random Networks

abstract:
  We propose a Markov chain simulation method to generate simple connected
random graphs with a specified degree sequence and level of clustering. The
networks generated by our algorithm are random in all other respects and can
thus serve as generic models for studying the impacts of degree distributions
and clustering on dynamical processes as well as null models for detecting
other structural properties in empirical networks.


title: Quantum Networks on Cubelike Graphs

abstract:
  Cubelike graphs are the Cayley graphs of the elementary abelian group (Z_2)^n
(e.g., the hypercube is a cubelike graph). We give conditions for perfect state
transfer between two particles in quantum networks modeled by a large class of
cubelike graphs. This generalizes results of Christandl et al. [Phys. Rev.
Lett. 92, 187902 (2004)] and Facer et al. [Phys. Rev. A 92, 187902 (2008)].


title:
Magnetized GRB outflow model: weak reverse shock emission and short
  energy transfer timescale

abstract:
  We show that the absence of the bright optical flashes in most {\it Swift}
Gamma-ray Burst (GRB) afterglows can be explained, if the reverse shock region
is magnetized with a $\sigma \sim 1$, or the emission spectrum of the electrons
accelerated in the mildly magnetized ($0.1<\sigma<1$) reverse shock front is
very soft, or the reverse shock of a non-magnetized outflow is
sub-relativistic, where $\sigma$ is the ratio of the magnetic energy flux to
the particle energy flux. We also find that for $\sigma\gg 1$, the energy
transfer between the magnetized ejecta and the forward shock may be too quick
to account for the shallow decline phase that is well detected in many {\it
Swift} GRB X-ray afterglows.


title:
O carater de Chern-Connes para C$^*$-sistemas dinamicos calculado em
  algumas algebras de operadores pseudodiferenciais

abstract:
  Given a C$^*$-dynamical system $(A, G, \alpha)$ one defines a homomorphism,
called the Chern-Connes character, that take an element in $K_0(A) \oplus
K_1(A)$, the K-theory groups of the C$^*$-algebra $A$, and maps it into
$H_{\mathbb{R}}^*(G)$, the real deRham cohomology ring of $G$. We explictly
compute this homomorphism for the examples $(\overline{\Psi_{cl}^0(S^1)}, S^1,
\alpha)$ and $(\overline{\Psi_{cl}^0(S^2)}, SO(3), \alpha)$, where
$\overline{\Psi_{cl}^0(M)}$ denotes the C$^*$-algebra generated by the
classical pseudodifferential operators of zero order in the manifold $M$ and
$\alpha$ the action of conjugation by the regular representation
(translations).


title: Series Jackson networks and non-crossing probabilities

abstract:
  This paper studies the queue length process in series Jackson networks with
external input to the first station. We show that its Markov transition
probabilities can be written as a finite sum of non-crossing probabilities, so
that questions on time-dependent queueing behavior are translated to questions
on non-crossing probabilities. This makes previous work on non-crossing
probabilities relevant to queueing systems and allows new queueing results to
be established. To illustrate the latter, we prove that the relaxation time
(i.e., the reciprocal of the `spectral gap') of a positive recurrent system
equals the relaxation time of an M/M/1 queue with the same arrival and service
rates as the network's bottleneck station. This resolves a conjecture of Blanc,
which he proved for two queues in series.


title:
A Class of Nonperturbative Configurations in Abelian-Higgs Models:
  Complexity from Dynamical Symmetry Breaking

abstract:
  We present a numerical investigation of the dynamics of symmetry breaking in
both Abelian and non-Abelian $[S U (2)]$ Higgs models in three spatial
dimensions. We find a class of time-dependent, long-lived nonperturbative field
configurations within the range of parameters corresponding to type-1
superconductors, that is, with vector masses ($m_v$) larger than scalar masses
($m_s$). We argue that these emergent nontopological configurations are related
to oscillons found previously in other contexts. For the Abelian-Higgs model,
our lattice implementation allows us to map the range of parameter space -- the
values of $\beta = (m_s /m_v)^2$ -- where such configurations exist and to
follow them for times $t \sim \O(10^5) m^{-1}$. An investigation of their
properties for $\hat z$-symmetric models reveals an enormously rich structure
of resonances and mode-mode oscillations reminiscent of excited atomic states.
For the SU(2) case, we present preliminary results indicating the presence of
similar oscillonic configurations.


title: The volume densities of giant molecular clouds in M83

abstract:
  Using observed GALEX far-ultraviolet (FUV) fluxes and VLA images of the 21-cm
HI column densities, along with estimates of the local dust abundances, we
measure the volume densities of a sample of actively star-forming giant
molecular clouds (GMCs) in the nearby spiral galaxy M83 on a typical resolution
scale of 170 pc. Our approach is based on an equilibrium model for the cycle of
molecular hydrogen formation on dust grains and photodissociation under the
influence of the FUV radiation on the cloud surfaces of GMCs. We find a range
of total volume densities on the surface of GMCs in M83, namely 0.1 - 400 cm-3
inside R25, 0.5 - 50 cm-3 outside R25 . Our data include a number of GMCs in
the HI ring surrounding this galaxy. Finally, we discuss the effects of
observational selection, which may bias our results.


title:
Spin squeezing of atomic ensembles by multi-colour quantum
  non-demolition measurements

abstract:
  We analyze the creation of spin squeezed atomic ensembles by simultaneous
dispersive interactions with several optical frequencies. A judicious choice of
optical parameters enables optimization of an interferometric detection scheme
that suppresses inhomogeneous light shifts and keeps the interferometer
operating in a balanced mode that minimizes technical noise. We show that when
the atoms interact with two-frequency light tuned to cycling transitions the
degree of spin squeezing $\xi^2$ scales as $\xi^2\sim 1/d$ where $d$ is the
resonant optical depth of the ensemble. In real alkali atoms there are loss
channels and the scaling may be closer to $\xi^2\sim 1/\sqrt d.$ Nevertheless
the use of two-frequencies provides a significant improvement in the degree of
squeezing attainable as we show by quantitative analysis of non-resonant
probing on the Cs D1 line. Two alternative configurations are analyzed: a
Mach-Zehnder interferometer that uses spatial interference, and an interaction
with multi-frequency amplitude modulated light that does not require a spatial
interferometer.


title: Stellar kinematics in double-barred galaxies: the sigma-hollows

abstract:
  We present SAURON integral-field stellar velocity and velocity dispersion
maps for four double-barred early-type galaxies: NGC2859, NGC3941, NGC4725 and
NGC5850. The presence of the inner bar does not produce major changes in the
line-of-sight velocity, but it appears to have an important effect in the
stellar velocity dispersion maps: we find two sigma-hollows of amplitudes
between 10 and 40 km/s on either side of the center, at the ends of the inner
bars. We have performed numerical simulations to explain these features. Ruling
out other possibilities, we conclude that the sigma-hollows are an effect of
the contrast between two kinematically different components: the high velocity
dispersion of the bulge and the more ordered motion (low velocity dispersion)
of the inner bar.


title: Building a terminology network for search: the KoMoHe project

abstract:
  The paper reports about results on the GESIS-IZ project "Competence Center
Modeling and Treatment of Semantic Heterogeneity" (KoMoHe). KoMoHe supervised a
terminology mapping effort, in which 'cross-concordances' between major
controlled vocabularies were organized, created and managed. In this paper we
describe the establishment and implementation of cross-concordances for search
in a digital library (DL).


title:
Exploring a New Population of Compact Objects: X-ray and IR Observations
  of the Galactic Centre

abstract:
  I describe the IR and X-ray observational campaign we have undertaken for the
purpose of determining the nature of the faint discrete X-ray source population
discovered by Chandra in the Galactic Center (GC). Data obtained for this
project includes a deep Chandra survey of the Galactic Bulge; deep, high
resolution IR imaging from VLT/ISAAC, CTIO/ISPI, and the UKIDSS Galactic Plane
Survey (GPS); and IR spectroscopy from VLT/ISAAC and IRTF/SpeX. By
cross-correlating the GC X-ray imaging from Chandra with our IR surveys, we
identify candidate counterparts to the X-ray sources via astrometry. Using a
detailed IR extinction map, we are deriving magnitudes and colors for all the
candidates. Having thus established a target list, we will use the multi-object
IR spectrograph FLAMINGOS-2 on Gemini-South to carry out a spectroscopic survey
of the candidate counterparts, to search for emission line signatures which are
a hallmark of accreting binaries. By determining the nature of these X-ray
sources, this FLAMINGOS-2 Galactic Center Survey will have a dramatic impact on
our knowledge of the Galactic accreting binary population.


title:
Phase Transition in Heisenberg Stacked Triangular Antiferromagnets: End
  of a Controversy

abstract:
  By using the Wang-Landau flat-histogram Monte Carlo (MC) method for very
large lattice sizes never simulated before, we show that the phase transition
in the frustrated Heisenberg stacked triangular antiferromagnet is of
first-order, contrary to results of earlier MC simulations using old-fashioned
methods. Our result lends support to the conclusion of a nonperturbative
renormalization group performed on an effective Hamiltonian. It puts an end to
a 20-year long controversial issue.


title: Logics for the Relational Syllogistic

abstract:
  The Aristotelian syllogistic cannot account for the validity of many
inferences involving relational facts. In this paper, we investigate the
prospects for providing a relational syllogistic. We identify several fragments
based on (a) whether negation is permitted on all nouns, including those in the
subject of a sentence; and (b) whether the subject noun phrase may contain a
relative clause. The logics we present are extensions of the classical
syllogistic, and we pay special attention to the question of whether reductio
ad absurdum is needed. Thus our main goal is to derive results on the existence
(or non-existence) of syllogistic proof systems for relational fragments. We
also determine the computational complexity of all our fragments.


title: Diversity-induced resonance in a model for opinion formation

abstract:
  We study an opinion formation model that takes into account that individuals
have diverse preferences when forming their opinion regarding a particular
issue. We show that the system exhibits a phenomenon called "diversity-induced
resonance"[Tessone et al. Phys. Rev. Lett. 97, 194101 (2006)], by which an
external influence (for example advertising, or fashion trends) is better
followed by populations having the right degree of diversity in their
preferences, rather than others where the individuals are identical or have too
different preferences. We support our findings by numerical simulations of the
model and a mean-field type analytical theory.


title:
Differentiating unparticles from extra dimensions via mini black hole
  thermodynamics

abstract:
  A simple method for differentiating two similar accelerator-based black hole
creation mechanisms -- compactified extra dimensions and unparticle-enhanced
gravity -- is discussed, in light of several properties of black hole
thermodynamics. The real-valued scaling dimension $\du$ will induce
interactions that mimic those in a universe with $(2\du-2)$-extra spatial
dimensions, and thus provides an alternative mechanism for black hole creation
at the LHC within the confines of standard 4D general relativity. This results
in mass-dependent Hawking temperature profiles that depend primarily on $\du$,
yielding an evaporation signature unique to the framework. Specifically, a
precision reconstruction of the Hawking temperature spectrum morphology for
black holes of mass $\Mbh$ yields conclusive evidence of one mechanism over the
other, due to the presence of additional adjustable parameters in the
unparticle sector.


title: Population III Supernovae and the Assembly of the First Galaxies

abstract:
  Current numerical studies suggest that the first galaxies formed a few stars
at a time and were enriched only gradually by the first heavy elements.
However, the large box sizes in these models cannot resolve primordial
supernova explosions or the mixing of their metals with ambient gas, which
could result in intervening, prompt generations of low-mass stars. We present
multiscale 1D models of Population III supernovae in cosmological halos that
evolve the blast from its earliest stages as a free expansion. We find that if
the star ionizes the halo, the ejecta strongly interacts with the dense shell
swept up by the H II region, potentially cooling and fragmenting it into clumps
that are unstable to gravitational collapse. If the star fails to ionize the
halo, the explosion propagates metals out to 20 - 40 pc and then collapses,
enriching tens of thousands of solar masses of primordial gas, in contrast to
previous models that suggest such explosions 'fizzle'. Rapid formation of
low-mass stars trapped in the gravitational potential well of the halo appears
to be inevitable in such circumstances. Consequently, it is possible that far
more stars were swept up into the first galaxies, at earlier times and with
distinct chemical signatures, than in present models. Upcoming measurements by
JWST and ALMA may discriminate between these two paradigms.


title: L^1 Ergodic Theorems for Random Group Averages

abstract:
  This is an earlier, but more general, version of "An L^1 Ergodic Theorem for
Sparse Random Subsequences". We prove an L^1 ergodic theorem for averages
defined by independent random selector variables, in a setting of general
measure-preserving group actions. A far more readable version of this paper is
in the works.


title:
Discovery of Eclipsing Binary Central Stars in the Planetary Nebulae M
  3-16, H 2-29 and M 2-19

abstract:
  Progress in understanding the formation and evolution of planetary nebulae
(PN) has been restricted by a paucity of well-determined central star masses.
  To address this deficiency we aim to (i) significantly increase the number of
known eclipsing binary central stars of PN (CSPN), and subsequently (ii)
directly obtain their masses and absolute dimensions by combining their
light-curve parameters with planned radial velocity data.
  Using photometric data from the third phase of the Optical Gravitational
Lensing Experiment (OGLE) we have searched for periodic variability in a large
sample of PN towards the Galactic Bulge using Fourier and phase-dispersion
minimisation techniques.
  Among some dozen periodically variable CSPN found, we report here on three
new eclipsing binaries: M 3-16, H 2-29 and M 2-19.
  We present images, confirmatory spectroscopy and light-curves of the systems.


title: Short Pulse Dynamics in Strongly Nonlinear Dissipative Granular Chains

abstract:
  We study the energy decay properties of a pulse propagating in a strongly
nonlinear granular chain with damping proportional to the relative velocity of
the grains. We observe a wave disturbance that at low viscosities consists of
two parts exhibiting two entirely different time scales of dissipation. One
part is an attenuating solitary wave, is dominated by discreteness and
nonlinearity effects as in a dissipationless chain, and has the shorter
lifetime. The other is a purely dissipative shocklike structure with a much
longer lifetime and exists only in the presence of dissipation. The range of
viscosities and initial configurations that lead to this complex wave
disturbance are explored.


title:
Measurement of the Branching Fractions of Bbar -> D** l^- nubar_l Decays
  in Events Tagged by a Fully Reconstructed B Meson

abstract:
  We report a measurement of the branching fractions of Bbar -> D** l^- nubar_l
decays based on 417 fb-1 of data collected at the Upsilon(4S) resonance with
the BaBar detector at the PEP-II e+e- storage rings. Events are selected by
fully reconstructing one of the B mesons in a hadronic decay mode. A fit to the
invariant mass differences m(D(*)pi)-m(D(*)) is performed to extract the signal
yields of the different D** states. We observe the Bbar -> D** l^- nubar_l
decay modes corresponding to the four D** states predicted by Heavy Quark
Symmetry with a significance greater than six standard deviations including
systematic uncertainties.


title:
Rate dependent shear bands in a shear transformation zone model of
  amorphous solids

abstract:
  We use Shear Transformation Zone (STZ) theory to develop a deformation map
for amorphous solids as a function of the imposed shear rate and initial
material preparation. The STZ formulation incorporates recent simulation
results [Haxton and Liu, PRL 99 195701 (2007)] showing that the steady state
effective temperature is rate dependent. The resulting model predicts a wide
range of deformation behavior as a function of the initial conditions,
including homogeneous deformation, broad shear bands, extremely thin shear
bands, and the onset of material failure. In particular, the STZ model predicts
homogeneous deformation for shorter quench times and lower strain rates, and
inhomogeneous deformation for longer quench times and higher strain rates. The
location of the transition between homogeneous and inhomogeneous flow on the
deformation map is determined in part by the steady state effective
temperature, which is likely material dependent. This model also suggests that
material failure occurs due to a runaway feedback between shear heating and the
local disorder, and provides an explanation for the thickness of shear bands
near the onset of material failure. We find that this model, which resolves
dynamics within a sheared material interface, predicts that the stress weakens
with strain much more rapidly than a similar model which uses a single state
variable to specify internal dynamics on the interface.


title: Matrix Models for the Black Hole Information Paradox

abstract:
  We study various matrix models with a charge-charge interaction as toy models
of the gauge dual of the AdS black hole. These models show a continuous
spectrum and power-law decay of correlators at late time and infinite N,
implying information loss in this limit. At finite N, the spectrum is discrete
and correlators have recurrences, so there is no information loss. We study
these models by a variety of techniques, such as Feynman graph expansion, loop
equations, and sum over Young tableaux, and we obtain explicitly the leading
1/N^2 corrections for the spectrum and correlators. These techniques are
suggestive of possible dual bulk descriptions. At fixed order in 1/N^2 the
spectrum remains continuous and no recurrence occurs, so information loss
persists. However, the interchange of the long-time and large-N limits is
subtle and requires further study.


title: Nonmesonic weak decay spectra of $^4_\Lambda$He

abstract:
  To comprehend the recent Brookhaven National Laboratory experiment E788 on
$^4_\Lambda$He, we have outlined a simple theoretical framework, based on the
independent-particle shell model, for the one-nucleon-induced nonmesonic weak
decay spectra. Basically, the shapes of all the spectra are tailored by the
kinematics of the corresponding phase space, depending very weakly on the
dynamics, which is gauged here by the one-meson-exchange-potential. In spite of
the straightforwardness of the approach a good agreement with data is acheived.
This might be an indication that the final-state-interactions and the
two-nucleon induced processes are not very important in the decay of this
hypernucleus. We have also found that the $\pi+K$ exchange potential with soft
vertex-form-factor cutoffs $(\Lambda_\pi \approx 0.7$ GeV, $\Lambda_K \approx
0.9$ GeV), is able to account simultaneously for the available experimental
data related to $\Gamma_p$ and $\Gamma_n$ for $^4_\Lambda$H, $^4_\Lambda$He,
and $^5_\Lambda$He.


title:
On the calculation rule of probability of relativistic free particle in
  quantum mechanics

abstract:
  As is well known, in quantum mechanics, the calculation rule of the
probability that an eigen-value a_n is observed when the physical quantity A is
measured for a state described by the state vector |> is P(a_n)=<|A_n><A_n|> .
However, in Ref.[1], based on strict logical reasoning and mathematical
calculation, it has been pointed out, replacing <|A_n><A_n|>, one should use a
new rule to calculate P(a_n) for particle satisfying the Dirac equation.
  In this paper, we first state some results given by Ref.[1]. And then, we
present a proof for the new calculation rule of probability according to Dirac
sea of negative energy particles, hole theory and the principle "the vacuum is
not observable". Finally, we discuss simply the case of particle satisfying the
Klein-Gordon equation.


title: Model independent results for nucleon structure

abstract:
  I review recent results regarding the nucleon charge and magnetization
densities as well as the shape of the nucleon. First, some phenomenolgical
considerations that show that the shape of the proton is not round are
discussed. Then model independent results regarding the neutron and proton
charge density, and the proton magnetization density are presented. Finally, I
show how the spin-dependent densities that reveal the shape of the proton can
be measured via their relation with transverse momentum distributions. The
present work is made possible by the recent tremendous experimental progress
made at Bates, Mainz and Jefferson Laboratory.


title:
Combined CDF and Dzero Upper Limits on Standard Model Higgs Boson
  Production at High Mass (155-200 GeV/c2) with 3 fb-1 of data

abstract:
  We combine results from CDF and DO searches for a standard model Higgs boson
in ppbar collisions at the Fermilab Tevatron, at sqrt{s}=1.96 TeV. With 3.0
fb-1 of data analyzed at CDF, and at DO, the 95% C.L. upper limits on Higgs
boson production are a factor of 1.2, 1.0 and 1.3 higher than the SM cross
section for a Higgs boson mass of m_{H}=$165, 170 and 175 GeV, respectively. We
exclude at 95% C.L. a standard model Higgs boson of m_H=170 GeV. Based on
simulation, the ratios of the corresponding median expected upper limit to the
Standard Model cross section are 1.2, 1.4 and 1.7. Compared to the previous
Higgs Tevatron combination, more data and refined analysis techniques have been
used. These results extend significantly the individual limits of each
experiment and provide new knowledge on the mass of the standard model Higgs
boson beyond the LEP direct searches.


title: Partial choice functions for families of finite sets

abstract:
  Let m>2 be an integer. We show that ZF + "For every integer n, Every
countable family of non-empty sets of cardinality at most n has an infinite
partial choice function" is not strong enough to prove that every countable set
of m-element sets has a choice function. In the case where m=p is prime, to
obtain the independence result we make use of a permutation model in which the
set of atoms has the structure of a vector space over the field of p elements.
When m is non-prime, a suitable permutation model is built from the models used
in the prime cases.


title: Reshape the perfect electrical conductor cylinder at will

abstract:
  A general method is proposed to design the cylindrical cloak, concentrator
and superscatterer with arbitrary cross section. The method is demonstrated by
the design of a perfect electrical conductor (PEC) reshaper which is able to
reshape a PEC cylinder arbitrarily by combining the concept of cloak,
concentrator and superscatterer together. Numerical simulations are performed
to demonstrate its properties.


title: N=2,4 Supersymmetric Gauge Field Theory in 2T-physics

abstract:
  In the context of Two Time Physics in 4+2 dimensions we construct the most
general N=2,4 supersymmetric Yang Mills gauge theories for any gauge group G.
This builds on our previous work for N=1 supersymmetry. The action, the
conserved SUSY currents, and the off-shell SU(N) covariant SUSY transformation
laws are presented for both N=2 and N=4. The on-shell SUSY transformations
close to the supergroup SU(2,2$|$N) with N=1,2,4. The SU(2,2)=SO(4,2)
sub-symmetry is realized linearly on 4+2 dimensional flat spacetime. All
fields, including vectors and spinors, are in 4+2 dimensions. The extra gauge
symmetries in 2T field theory, together with the kinematic constraints that
follow from the action, remove all the ghosts to give a unitary theory. By
choosing gauges and solving the kinematic equations, the 2T field theory in 4+2
flat spacetime can be reduced to various shadows in various 3+1 dimensional
(generally curved) spacetimes. These shadows are related to each other by
dualities. The conformal shadows of our theories in flat 3+1 dimensions
coincide with the well known counterpart N=1,2,4 supersymmetric massless
renormalizable field theories in 3+1 dimensions. It is expected that our more
symmetric new structures in 4+2 spacetime may be useful for non-perturbative or
exact solutions of these theories.


title:
Electric-Field-Induced Nuclear Spin Resonance Mediated by Oscillating
  Electron Spin Domains in GaAs-Based Semiconductors

abstract:
  We demonstrate an alternative nuclear spin resonance using radio frequency
(RF) electric field (nuclear electric resonance: NER) instead of magnetic
field. The NER is based on the electronic control of electron spins forming a
domain structure. The RF electric field applied to a gate excites spatial
oscillations of the domain walls and thus temporal oscillations of the
hyperfine field to nuclear spins. The RF power and burst duration dependence of
the NER spectrum provides insight into the interplay between nuclear spins and
the oscillating domain walls.


title:
Galaxy Groups in the SDSS DR4: III. the luminosity and stellar mass
  functions

abstract:
  Using a large galaxy group catalogue constructed from the Sloan Digital Sky
Survey Data Release 4 (SDSS DR4) with an adaptive halo-based group finder, we
investigate the luminosity and stellar mass functions for different populations
of galaxies (central versus satellite; red versus blue; and galaxies in groups
of different masses) and for groups themselves. The conditional stellar mass
function (CSMF), which describes the stellar distribution of galaxies in halos
of a given mass for central and satellite galaxies can be well modeled with a
log-normal distribution and a modified Schechter form, respectively. On
average, there are about 3 times as many central galaxies as satellites. Among
the satellite population, there are in general more red galaxies than blue
ones. For the central population, the luminosity function is dominated by red
galaxies at the massive end, and by blue galaxies at the low mass end. At the
very low-mass end ($M_\ast \la 10^9 h^{-2}\Msun$), however, there is a marked
increase in the number of red centrals. We speculate that these galaxies are
located close to large halos so that their star formation is truncated by the
large-scale environments. The stellar-mass function of galaxy groups is well
described by a double power law, with a characteristic stellar mass at $\sim
4\times 10^{10}h^{-2}\Msun$. Finally, we use the observed stellar mass function
of central galaxies to constrain the stellar mass - halo mass relation for low
mass halos, and obtain $M_{\ast, c}\propto M_h^{4.9}$ for $M_h \ll 10^{11}
\msunh$.


title: Executable Set Theory and Arithmetic Encodings in Prolog

abstract:
  The paper is organized as a self-contained literate Prolog program that
implements elements of an executable finite set theory with focus on
combinatorial generation and arithmetic encodings. The complete Prolog code is
available at http://logic.csci.unt.edu/tarau/research/2008/pHFS.zip . First,
ranking and unranking functions for some "mathematically elegant" data types in
the universe of Hereditarily Finite Sets with Urelements are provided,
resulting in arithmetic encodings for powersets, hypergraphs, ordinals and
choice functions. After implementing a digraph representation of Hereditarily
Finite Sets we define {\em decoration functions} that can recover well-founded
sets from encodings of their associated acyclic digraphs. We conclude with an
encoding of arbitrary digraphs and discuss a concept of duality induced by the
set membership relation. In the process, we uncover the surprising possibility
of internally sharing isomorphic objects, independently of their language level
types and meanings.


title:
The black hole fundamental plane: revisit with a larger sample of radio
  and X-ray emitting broad-line AGNs

abstract:
  We use a recently released SDSS catalog of X-ray emitting AGNs in conjunction
with the FIRST 20cm radio survey to investigate the black hole fundamental
plane relationship between the 1.4GHz radio luminosity ($L_r$), 0.1-2.4 keV
X-ray luminosity ($L_X$), and the black hole mass ($M$), namely, $log
L_r=\xi_{RX}log L_X+\xi_{RM}log M +const$. For this purpose, we have compiled a
large sample of 725 broad-line AGNs, which consists of 498 radio-loud sources
and 227 radio-quiet sources. Our results are generally consistent with those in
our previous work based on a smaller sample of 115 SDSS AGNs. We confirm that
radio-loud objects have a steeper slope ($\xi_{RX}$) in the radio-X-ray
relationship with respect to radio-quiet objects, and the dependence of the
black hole fundamental plane on the black hole mass ($\xi_{RM}$) is weak. We
also find a tight correlation with a similar slope between the soft X-ray
luminosity and broad emission line luminosity for both radio-loud and
radio-quiet AGNs, which implies that their soft X-ray emission is unbeamed and
probably related to the accretion process. With the current larger sample of
AGNs, we are able to study the redshift evolution of the black hole fundamental
plane relation for both radio-loud and radio-quiet subsamples. We find that
there is no clear evidence of evolution for radio-quiet AGNs, while for
radio-loud ones there is a weak trend where $\xi_{RM}$ decreases as the
redshift increases. This may be understood in part as due to the observed
evolution of the radio spectral index as a function of redshift. Finally, we
discuss the relativistic beaming effect and some other uncertainties related to
the black hole fundamental plane (Abridged).


title:
Evolution to a smooth universe in an ekpyrotic contracting phase with w
  > 1

abstract:
  A period of slow contraction with equation of state w > 1, known as an
ekpyrotic phase, has been shown to flatten and smooth the universe if it begins
the phase with small perturbations. In this paper, we explore how robust and
powerful the ekpyrotic smoothing mechanism is by beginning with highly
inhomogeneous and anisotropic initial conditions and numerically solving for
the subsequent evolution of the universe. Our studies, based on a universe with
gravity plus a scalar field with a negative exponential potential, show that
some regions become homogeneous and isotropic while others exhibit
inhomogeneous and anisotropic behavior in which the scalar field behaves like a
fluid with w=1. We find that the ekpyrotic smoothing mechanism is robust in the
sense that the ratio of the proper volume of the smooth to non-smooth region
grows exponentially fast along time slices of constant mean curvature.


title:
The effect of two-temperature post-shock accretion flow on the linear
  polarization pulse in magnetic cataclysmic variables

abstract:
  The temperatures of electrons and ions in the post-shock accretion region of
a magnetic cataclysmic variable (mCV) will be equal at sufficiently high mass
flow rates or for sufficiently weak magnetic fields. At lower mass flow rates
or in stronger magnetic fields, efficient cyclotron cooling will cool the
electrons faster than the electrons can cool the ions and a two-temperature
flow will result. Here we investigate the differences in polarized radiation
expected from mCV post-shock accretion columns modeled with one- and
two-temperature hydrodynamics. In an mCV model with one accretion region, a
magnetic field >~30 MG and a specific mass flow rate of ~0.5 g/cm/cm/s, along
with a relatively generic geometric orientation of the system, we find that in
the ultraviolet either a single linear polarization pulse per binary orbit or
two pulses per binary orbit can be expected, depending on the accretion column
hydrodynamic structure (one- or two-temperature) modeled. Under conditions
where the physical flow is two-temperature, one pulse per orbit is predicted
from a single accretion region where a one-temperature model predicts two
pulses. The intensity light curves show similar pulse behavior but there is
very little difference between the circular polarization predictions of one-
and two-temperature models. Such discrepancies indicate that it is important to
model some aspect of two-temperature flow in indirect imaging procedures, like
Stokes imaging, especially at the edges of extended accretion regions, were the
specific mass flow is low, and especially for ultraviolet data.


title: Generalized Cross-correlation Properties of Chu Sequences

abstract:
  In this paper, we analyze the cross-correlation properties for Chu sequences,
which provide information on the distribution of the maximum magnitudes of the
cross-correlation function. Furthermore, we can obtain the number of available
sequences for a given maximum magnitude of the cross-correlation function and
the sequence length.


title:
Colossal enhancement of upper critical fields in noncentrosymmetric
  heavy fermion superconductors near quantum criticality: CeRhSi$_3$ and
  CeIrSi$_3$

abstract:
  Strong coupling effects on the upper critical fields $H_{c2}$ along the
c-axis in the noncentrosymmetric heavy fermion superconductors near quantum
criticality CeRhSi$_3$ and CeIrSi$_3$ are examined. For sufficiently large
spin-orbit interactions due to the lack of inversion symmetry, $H_{c2}$ is
mainly determined by the orbital depairing effects. From microscopic
calculations taking into account the strong spin fluctuations, we show that
$H_{c2}$ is extremely enhanced as the system approaches the quantum critical
point, resulting in $H_{c2}\sim 30$T even in the case with the low transition
temperature $T_c(H=0)\sim 1$K, which well explains the huge $H_{c2}$ observed
in the recent experiments. Our results reveal intrinsic and universal
properties common to strong coupling superconductivity caused by spin
fluctuations near quantum criticality.


title:
Astrometry of H$_{2}$O Masers in Nearby Star-Forming Regions with VERA.
  III. IRAS 22198+6336 in L1204G

abstract:
  We present results of multi-epoch VLBI observations with VERA (VLBI
Exploration of Radio Astrometry) of the 22 GHz H$_{2}$O masers associated with
a young stellar object (YSO) IRAS 22198+6336 in a dark cloud L1204G. Based on
the phase-referencing VLBI astrometry, we derive an annual parallax of IRAS
22198+6336 to be 1.309$\pm$0.047 mas, corresponding to the distance of
764$\pm$27 pc from the Sun. Although the most principal error source of our
astrometry is attributed to the internal structure of the maser spots, we
successfully reduce the errors in the derived annual parallax by employing the
position measurements for all of the 26 detected maser spots. Based on this
result, we reanalyze the spectral energy distribution (SED) of IRAS 22198+6336
and find that the bolometric luminosity and total mass of IRAS 22198+6336 are
450$L_{\odot}$ and 7$M_{\odot}$, respectively. These values are consistent with
an intermediate-mass YSO deeply embedded in the dense dust core, which has been
proposed to be an intermediate-mass counterpart of a low-mass Class 0 source.
In addition, we obtain absolute proper motions of the H$_{2}$O masers for the
most blue-shifted components. We propose that the collimated jets aligned along
the east-west direction are the most plausible explanation for the origin of
the detected maser features.


title: On the union stabilization of two Heegaard splittings

abstract:
  Let two Heegaard splittings $V_1 \cup W_1$ and $V_2 \cup W_2$ of a 3-manifold
$M$ be given. We consider the union stabilization $M=V \cup W$ which is a
common stabilization of $V_1 \cup W_1$ and $V_2 \cup W_2$ having the property
that $V=V_1 \cup V_2$. We show that any two Heegaard splittings of a 3-manifold
have a union stabilization. We also give some examples with numerical bounds on
the minimal genus of union stabilization. On the other hand, we give an example
of a candidate for which the minimal genus of union stabilization is strictly
larger than the usual stable genus -- the minimal genus of common
stabilization.


title:
How could the replica method improve accuracy of performance assessment
  of channel coding?

abstract:
  We explore the relation between the techniques of statistical mechanics and
information theory for assessing the performance of channel coding. We base our
study on a framework developed by Gallager in {\em IEEE Trans. Inform. Theory}
{\bf 11}, 3 (1965), where the minimum decoding error probability is
upper-bounded by an average of a generalized Chernoff's bound over a code
ensemble. We show that the resulting bound in the framework can be directly
assessed by the replica method, which has been developed in statistical
mechanics of disordered systems, whereas in Gallager's original methodology
further replacement by another bound utilizing Jensen's inequality is
necessary. Our approach associates a seemingly {\em ad hoc} restriction with
respect to an adjustable parameter for optimizing the bound with a phase
transition between two replica symmetric solutions, and can improve the
accuracy of performance assessments of general code ensembles including low
density parity check codes, although its mathematical justification is still
open.


title:
Resource Allocation of MU-OFDM Based Cognitive Radio Systems Under
  Partial Channel State Information

abstract: This paper has been withdrawn by the author due to some errors.


title:
Effect of Quantum Point Contact Measurement on Electron Spin State in
  Quantum Dot

abstract:
  We study the time evolution of two electron spin states in a double
quantum-dot system, which includes a nearby quantum point contact (QPC) as a
measurement device. We obtain that the QPC measurement induced decoherence is
in time scales of microsecond. We also find that the enhanced QPC measurement
will trap the system in its initial spin states, which is consistent with
quantum Zeno effect.


title: Demonstration of a quantum nondemolition sum gate

abstract:
  The sum gate is the canonical two-mode gate for universal quantum computation
based on continuous quantum variables. It represents the natural analogue to a
qubit C-NOT gate. In addition, the continuous-variable gate describes a quantum
nondemolition (QND) interaction between the quadrature components of two light
fields. We experimentally demonstrate a QND sum gate, employing the scheme by
R. Filip, P. Marek, and U.L. Andersen [\pra {\bf 71}, 042308 (2005)], solely
based on offline squeezed states, homodyne measurements, and feedforward. The
results are verified by simultaneously satisfying the criteria for QND
measurements in both conjugate quadratures.


title:
Conformal harmonic forms, Branson-Gover operators and Dirichlet problem
  at infinity

abstract:
  For odd dimensional Poincar\'e-Einstein manifolds $(X^{n+1},g)$, we study the
set of harmonic $k$-forms (for $k<\ndemi$) which are $C^m$ (with $m\in\nn$) on
the conformal compactification $\bar{X}$ of $X$. This is infinite dimensional
for small $m$ but it becomes finite dimensional if $m$ is large enough, and in
one-to-one correspondence with the direct sum of the relative cohomology
$H^k(\bar{X},\pl\bar{X})$ and the kernel of the Branson-Gover \cite{BG}
differential operators $(L_k,G_k)$ on the conformal infinity
$(\pl\bar{X},[h_0])$. In a second time we relate the set of
$C^{n-2k+1}(\Lambda^k(\bar{X}))$ forms in the kernel of $d+\delta_g$ to the
conformal harmonics on the boundary in the sense of \cite{BG}, providing some
sort of long exact sequence adapted to this setting. This study also provides
another construction of Branson-Gover differential operators, including a
parallel construction of the generalization of $Q$ curvature for forms.


title:
Cold streams in early massive hot haloes as the main mode of galaxy
  formation

abstract:
  The massive galaxies in the young universe, ten billion years ago, formed
stars at surprising intensities. Although this is commonly attributed to
violent mergers, the properties of many of these galaxies are incompatible with
such events, showing gas-rich, clumpy, extended rotating disks not dominated by
spheroids (Genzel et al. 2006, 2008). Cosmological simulations and clustering
theory are used to explore how these galaxies acquired their gas. Here we
report that they are stream-fed galaxies, formed from steady, narrow, cold gas
streams that penetrate the shock-heated media of massive dark matter haloes
(Dekel & Birnboim 2006; Keres et al. 2005). A comparison with the observed
abundance of star-forming galaxies implies that most of the input gas must
rapidly convert to stars. One-third of the stream mass is in gas clumps leading
to mergers of mass ratio greater than 1:10, and the rest is in smoother flows.
With a merger duy cycle of 0.1, three-quarters of the galaxies forming stars at
a given rate are fed by smooth streams. The rarer, submillimetre galaxies that
form stars even more intensely are largely merger-induced starbursts. Unlike
destructive mergers, the streams are likely to keep the rotating disk
configuration intact, although turbulent and broken into giant star-forming
clumps that merge into a central spheroid (Noguchi 1999; Genzel et al. 2008,
Elmegreen, Bournaud & Elmegreen 2008, Dekel, Sari & Ceverino 2009). This
stream-driven scenario for the formation of disks and spheroids is an
alternative to the merger picture.


title: Ranking and Unranking of Hereditarily Finite Functions and Permutations

abstract:
  Prolog's ability to return multiple answers on backtracking provides an
elegant mechanism to derive reversible encodings of combinatorial objects as
Natural Numbers i.e. {\em ranking} and {\em unranking} functions. Starting from
a generalization of Ackerman's encoding of Hereditarily Finite Sets with
Urelements and a novel tupling/untupling operation, we derive encodings for
Finite Functions and use them as building blocks for an executable theory of
{\em Hereditarily Finite Functions}. The more difficult problem of {\em
ranking} and {\em unranking} {\em Hereditarily Finite Permutations} is then
tackled using Lehmer codes and factoradics.
  The paper is organized as a self-contained literate Prolog program available
at \url{http://logic.csci.unt.edu/tarau/research/2008/pHFF.zip}


title:
Pairing Functions, Boolean Evaluation and Binary Decision Diagrams in
  Prolog

abstract:
  A "pairing function" J associates a unique natural number z to any two
natural numbers x,y such that for two "unpairing functions" K and L, the
equalities K(J(x,y))=x, L(J(x,y))=y and J(K(z),L(z))=z hold. Using pairing
functions on natural number representations of truth tables, we derive an
encoding for Binary Decision Diagrams with the unique property that its boolean
evaluation faithfully mimics its structural conversion to a a natural number
through recursive application of a matching pairing function. We then use this
result to derive {\em ranking} and {\em unranking} functions for BDDs and
reduced BDDs. The paper is organized as a self-contained literate Prolog
program, available at http://logic.csci.unt.edu/tarau/research/2008/pBDD.zip
  Keywords: logic programming and computational mathematics, pairing/unpairing
functions, encodings of boolean functions, binary decision diagrams, natural
number representations of truth tables


title: Logic Engines as Interactors

abstract:
  We introduce a new programming language construct, Interactors, supporting
the agent-oriented view that programming is a dialog between simple,
self-contained, autonomous building blocks.
  We define Interactors as an abstraction of answer generation and refinement
in Logic Engines resulting in expressive language extension and metaprogramming
patterns, including emulation of Prolog's dynamic database.
  A mapping between backtracking based answer generation in the callee and
"forward" recursion in the caller enables interaction between different
branches of the callee's search process and provides simplified design patterns
for algorithms involving combinatorial generation and infinite answer streams.
  Interactors extend language constructs like Ruby, Python and C#'s multiple
coroutining block returns through yield statements and they can emulate the
action of monadic constructs and catamorphisms in functional languages.
  Keywords: generalized iterators, logic engines, agent oriented programming
language constructs, interoperation with stateful objects, metaprogramming


title:
Four-loop lattice-regularized vacuum energy density of the
  three-dimensional SU(3) + adjoint Higgs theory

abstract:
  The pressure of QCD admits at high temperatures a factorization into purely
perturbative contributions from "hard" thermal momenta, and slowly convergent
as well as non-perturbative contributions from "soft" thermal momenta. The
latter can be related to various effective gluon condensates in a dimensionally
reduced effective field theory, and measured there through lattice simulations.
Practical measurements of one of the relevant condensates have suffered,
however, from difficulties in extrapolating convincingly to the continuum
limit. In order to gain insight on this problem, we employ Numerical Stochastic
Perturbation Theory to estimate the problematic condensate up to 4-loop order
in lattice perturbation theory. Our results seem to confirm the presence of
"large" discretization effects, going like $a\ln(1/a)$, where $a$ is the
lattice spacing. For definite conclusions, however, it would be helpful to
repeat the corresponding part of our study with standard lattice perturbation
theory techniques.


title: Communication Through Jamming over a Slotted ALOHA Channel

abstract:
  This work derives bounds on the jamming capacity of a slotted ALOHA system. A
system with n legitimate users, each with a Bernoulli arrival process is
considered. Packets are temporarily stored at the corresponding user queues,
and a slotted ALOHA strategy is used for packet transmissions over the shared
channel. The scenario considered is that of a pair of illegitimate users that
jam legitimate transmissions in order to communicate over the slotted ALOHA
channel. Jamming leads to binary signaling between the illegitimate users, with
packet collisions due to legitimate users treated as (multiplicative) noise in
this channel. Further, the queueing dynamics at the legitimate users
stochastically couples the jamming strategy used by the illegitimate users and
the channel evolution.
  By considering various i.i.d. jamming strategies, achievable jamming rates
over the slotted ALOHA channel are derived. Further, an upper bound on the
jamming capacity over the class of all ergodic jamming policies is derived.
These bounds are shown to be tight in the limit where the offered system load
approaches unity.


title:
Angle-resolved photoemission spectroscopy of electron-doped cuprate
  superconductors: Isotropic electron-phonon coupling

abstract:
  We have performed high resolution angle resolved photoemission (ARPES)
studies on electron doped cuprate superconductors Sm2-xCexCuO4 (x=0.10, 0.15,
0.18), Nd2-xCexCuO4 (x=0.15) and Eu2-xCexCuO4 (x=0.15). Imaginary parts of the
electron removal self energy show step-like features due to an electron-bosonic
mode coupling. The step-like feature is seen along both nodal and anti-nodal
directions but at energies of 50 and 70 meV, respectively, independent of the
doping and rare earth element. Such energy scales can be understood as being
due to preferential coupling to half- and full-breathing mode phonons,
revealing the phononic origin of the kink structures. Estimated electron-phonon
coupling constant lambda from the self energy is roughly independent of the
doping and momentum. The isotropic nature of lambda is discussed in comparison
with the hole doped case where a strong anisotropy exists.


title: Charge transport and determinants

abstract:
  We review some known facts in the transport theory of mesoscopic systems,
including counting statistics, and discuss its relation with the mathematical
treatment of open systems.


title:
Millimeter- and Submillimeter-Wave Observations of the OMC-2/3 Region.
  III. An Extensive Survey for Molecular Outflows

abstract:
  Using the ASTE 10 m submillimeter telescope and the 1.4 m Infrared Survey
Facility (IRSF), we performed an extensive outflow survey in the Orion
Molecular Cloud -2 and -3 region. Our survey, which includes 41 potential
star-forming sites, has been newly compiled using multi-wavelength data based
on millimeter- and submillimeter-continuum observations as well as radio
continuum observations. From the CO (3-2) observations performed with the ASTE
10 m telescope, we detected 14 CO molecular outflows, seven of which were newly
identified. This higher detection rate, as compared to previous CO (1-0)
results in the same region, suggests that CO (3-2) may be a better outflow
tracer. Physical properties of these outflows and their possible driving
sources were derived. Derived parameters were compared with those of CO
outflows in low- and high-mass starforming regions. We show that the CO outflow
momentum correlates with the bolometric luminosity of the driving source and
with the envelope mass, regardless of the mass of the driving sources. In
addition to these CO outflows, seven sources having NIR features suggestive of
outflows were also identified.


title: A light neutralino in hybrid models of supersymmetry breaking

abstract:
  We show that in gauge mediation models where heavy messenger masses are
provided by the adjoint Higgs field of an underlying SU(5) theory, a
generalized gauge mediation spectrum arises with the characteristic feature of
having a neutralino LSP much lighter than in the standard gauge or gravity
mediation schemes. This naturally fits in a hybrid scenario where gravity
mediation, while subdominant with respect to gauge mediation, provides mu and
Bmu parameters of the appropriate size for electroweak symmetry breaking.


title: On the Center of Mass of Isolated Systems with General Asymptotics

abstract:
  We propose a definition of center of mass for asymptotically flat manifolds
satisfying Regge-Teitelboim condition at infinity. This definition has a
coordinate-free expression and natural properties. Furthermore, we prove that
our definition is consistent both with the one proposed by Corvino and Schoen
and another by Huisken and Yau. The main tool is a new density theorem for data
satisfying the Regge-Teitelboim condition.


title:
A functional of the one-body-reduced density matrix derived from the
  homogeneous electron gas: Performance for finite systems

abstract:
  An approximation for the exchange-correlation energy of
reduced-density-matrix-functional theory was recently derived from a study of
the homogeneous electron gas (N.N. Lathiotakis, N. Helbig, E.K.U. Gross, Phys.
Rev. B 75, 195120 (2007)). In the present work, we show how this approximation
can be extended appropriately to finite systems, where the Wigner Seitz radius
r_s, the parameter characterizing the constant density of the electron gas,
needs to be replaced. We apply the functional to a variety of molecules at
their equilibrium geometry, and also discuss its performance at the
dissociation limit. We demonstrate that, although originally derived from the
uniform gas, the approximation performs remarkably well for finite systems.


title: Single top: prospects at LHC

abstract:
  Single top quark processes are interesting as direct probes of the $Wtb$
vertex, and are also an important background in searches of the Higgs boson and
beyond the standard model physics. Both ATLAS and CMS have performed studies
with simulated data to estimate the expected uncertainty on the production
cross section measurements of the three single top processes ($t$-channel,
s-channel, $tW$ production) in the first years of LHC operations. Results in
the different channels and for the two experiments are reported.


title:
Complementary optical-potential analysis of alpha-particle elastic
  scattering and induced reactions at low energies

abstract:
  A previously derived semi-microscopic analysis based on the Double Folding
Model, for alpha-particle elastic scattering on A~100 nuclei at energies below
32 MeV, is extended to medium mass A ~ 50-120 nuclei and energies from ~13 to
50 MeV. The energy-dependent phenomenological imaginary part for this
semi-microscopic optical model potential was obtained including the dispersive
correction to the microscopic real potential, and used within a concurrent
phenomenological analysis of the same data basis. A regional parameter set for
low-energy alpha-particles entirely based on elastic-scattering data analysis
was also obtained for nuclei within the above-mentioned mass and energy ranges.
Then, an ultimate assessment of (alpha,gamma), (alpha,n) and (alpha,p) reaction
cross sections concerned target nuclei from 45Sc to 118Sn and incident energies
below ~12 MeV. The former diffuseness of the real part of optical potential as
well as the surface imaginary-potential depth have been found responsible for
the actual difficulties in the description of these data, and modified in order
to obtain an optical potential which describe equally well both the low energy
elastic-scattering and induced-reaction data of alpha-particles.


title:
Light Bosons of Electromagnetic Field and Breakdown of Relativistic
  Theory

abstract:
  In our analysis, a quantisation scheme for local electromagnetic waves in
vacuum is introduced by the model of nonideal Bose-gas consisting of
Bose-light-particles (which are no photons) with spin one and a finite mass.
This fact destroys the Relativistic Theory of Einstein as well as displays a
wrong sound of so-called a spontaneous breakdown of symmetry because the light
boson can be moved by speed of wave in vacuum.


title:
Idealized glass transitions under pressure: dynamics versus
  thermodynamics

abstract:
  The interplay of slow dynamics and thermodynamic features of dense liquids is
studied by examinining how the glass transition changes depending on the
presence or absence of Lennard-Jones-like attractions. Quite different
thermodynamic behavior leaves the dynamics unchanged, with important
consequences for high-pressure experiments on glassy liquids. Numerical results
are obtained within mode-coupling theory (MCT), but the qualitative features
are argued to hold more generally. A simple square-well model can be used to
explain generic features found in experiment.


title: Upconversion cooling of Er-doped low-phonon fluorescent solids

abstract:
  We report on a novel mechanism for laser cooling of fluorescent solids based
on infrared-to-visible upconversion often found in rare-earth-doped low-phonon
materials. This type of optical cooling presents some advantages with regards
to conventional anti-Stokes cooling. Among them, it allows to obtain cooling in
a broader range of frequencies around the barycenter of the infrared emitting
band.


title: The Connection between Orbits and Isophotal Shape in Elliptical Galaxies

abstract:
  We examine the origin of photometrical properties of N-body merger remnants
from the perpective of their orbital content. We show that disc mergers alone
are unlikely to form a boxy-discy dichotomy in isophotal shape, because of the
survival of disc-like orbits even in violent mergers. The shape of the
different orbit families can vary strongly, depending on how violent the merger
was. Minor axis tubes can become boxy and box orbits can be round. However, for
edge-on projections isophotal shape, orbital content and line-of-sight velocity
are well connected.


title:
A Proof of George Andrews' and Dave Robbins' q-TSPP Conjecture (modulo a
  finite amount of routine calculations)

abstract:
  In the historic conference Combinatoire Enumerative[LL] wonderfully organized
by Gilbert Labelle and Pierre Leroux there were many stimulating lectures,
including a very interesting one by Pierre Leroux himself, who talked about his
joint work with Xavier Viennot[LV], on solving differential equations
combinatorially! During the problem session of that very same colloque, chaired
by Pierre Leroux, Richard Stanley raised some intriguing problems about the
enumeration of plane partitions, that he later expanded into a fascinating
article[Sta1]. Most of these problems concerned the enumeration of symmetry
classes of plane partitions, that were discussed in more detail in another
article of Stanley[Sta2]. All of the conjectures in the latter article have
since been proved (see Dave Bressoud's modern classic[B]), except one, that, so
far, resisted the efforts of the greatest minds in enumerative combinatorics.
It concerns the proof of an explicit formula for the q-enumeration of totally
symmetric plane partitions, conjectured independently by George Andrews and
Dave Robbins([Sta2],[Sta1](conj. 7), [B](conj. 13)). In this tribute to Pierre
Leroux, we describe how to prove that last stronghold.


title: Microarrays, Empirical Bayes and the Two-Groups Model

abstract:
  The classic frequentist theory of hypothesis testing developed by Neyman,
Pearson and Fisher has a claim to being the twentieth century's most
influential piece of applied mathematics. Something new is happening in the
twenty-first century: high-throughput devices, such as microarrays, routinely
require simultaneous hypothesis tests for thousands of individual cases, not at
all what the classical theory had in mind. In these situations empirical Bayes
information begins to force itself upon frequentists and Bayesians alike. The
two-groups model is a simple Bayesian construction that facilitates empirical
Bayes analysis. This article concerns the interplay of Bayesian and frequentist
ideas in the two-groups setting, with particular attention focused on Benjamini
and Hochberg's False Discovery Rate method. Topics include the choice and
meaning of the null hypothesis in large-scale testing situations, power
considerations, the limitations of permutation methods, significance testing
for groups of cases (such as pathways in microarray studies), correlation
effects, multiple confidence intervals and Bayesian competitors to the
two-groups model.


title: The dealternating number and the alternation number of a closed 3-braid

abstract:
  We give an upper bound for the dealternating number of a closed 3-braid. As
applications, we determine the dealternating numbers, the alternation numbers
and the Turaev genera of some closed positive 3-braids. We also show that there
exist infinitely many positive knots with any dealternating number (or any
alternation number) and any braid index.


title:
Hot Subdwarfs in Binaries as the Source of the Far-UV Excess in
  Elliptical Galaxies

abstract:
  The excess of far-ultraviolet (far-UV) radiation in elliptical galaxies has
remained one of their most enduring puzzles. In contrast, the origin of old
blue stars in the Milky Way, hot subdwarfs, is now reasonably well understood:
they are hot stars that have lost their hydrogen envelopes by various binary
interactions. Here, we review the main evolutionary channels that produce hot
subdwarfs in the Galaxy and present the results of binary population synthesis
simulations that reproduce the main properties of the Galactic hot-subdwarf
population. Applying the same model to elliptical galaxies, we show how this
model can explain the main observational properties of the far-UV excess,
including the far-UV spectrum, without the need to invoke ad hoc physical
processes. The model implies that the UV excess is not a sign of age, as has
been postulated previously, and predicts that it should not be strongly
dependent on the metallicity of the population.


title: Exceptional points in quantum and classical dynamics

abstract:
  We notice that, when a quantum system involves exceptional points, i.e. the
special values of parameters where the Hamiltonian loses its self-adjointness
and acquires the Jordan block structure, the corresponding classical system
also exhibits a singular behaviour associated with restructuring of classical
trajectories. The system with the crypto-Hermitian Hamiltonian H = (p^2+z^2)/2
-igz^5 and hyper-ellictic classical dynamics is studied in details. Analogies
with supersymmetric Yang-Mills dynamics are elucidated.


title: Hydrodynamical Adaptive Mesh Refinement Simulations of Disk Galaxies

abstract:
  To date, fully cosmological hydrodynamic disk simulations to redshift zero
have only been undertaken with particle-based codes, such as GADGET, Gasoline,
or GCD+. In light of the (supposed) limitations of traditional implementations
of smoothed particle hydrodynamics (SPH), or at the very least, their
respective idiosyncrasies, it is important to explore complementary approaches
to the SPH paradigm to galaxy formation. We present the first high-resolution
cosmological disk simulations to redshift zero using an adaptive mesh
refinement (AMR)-based hydrodynamical code, in this case, RAMSES. We analyse
the temporal and spatial evolution of the simulated stellar disks' vertical
heating, velocity ellipsoids, stellar populations, vertical and radial
abundance gradients (gas and stars), assembly/infall histories,
warps/lopsideness, disk edges/truncations (gas and stars), ISM physics
implementations, and compare and contrast these properties with our sample of
cosmological SPH disks, generated with GCD+. These preliminary results are the
first in our long-term Galactic Archaeology Simulation program.