title:
Improving Einstein-Podolsky-Rosen Steering Inequalities with State
  Information

abstract:
  We discuss the relationship between entropic Einstein-Podolsky-Rosen
(EPR)-steering inequalities and their underlying uncertainty relations, along
with the hypothesis that improved uncertainty relations lead to tighter
EPR-steering inequalities. In particular, we discuss how the intrinsic
uncertainty in a mixed quantum state is used to improve existing uncertainty
relations and how this information affects one's ability to witness
EPR-steering. As an example, we consider the recent improvement (using a
quantum memory) to the entropic uncertainty relation between pairs of discrete
observables (Nat. Phys. 6, 659 (2010)) and show that a trivial substitution of
the tighter bound in the steering inequality leads to contradictions, due in
part to the fact that the improved bound depends explicitly on the state being
measured. By considering the assumptions that enter into the development of a
steering inequality, we derive correct steering inequalities from these
improved uncertainty relations and find that they are identical to ones already
developed (Phys. Rev. A, 87, 062103 (2013)). In addition, we consider how one
can use the information about the quantum state to improve our ability to
witness EPR-steering, and develop a new symmetric EPR-steering inequality as a
result.


title: Detection and Isolation of Link Failures under the Agreement Protocol

abstract:
  In this paper a property of the multi-agent consensus dynamics that relates
the failure of links in the network to jump discontinuities in the derivatives
of the output responses of the nodes is derived and verified analytically. At
the next step, an algorithm for sensor placement is proposed, which would
enable the designer to detect and isolate any link failures across the network
based on the observed jump discontinuities in the derivatives of the responses
of a subset of nodes. These results are explained through elaborative examples.


title: Vortex States in Archimedean Tiling Pinning Arrays

abstract:
  We numerically study vortex ordering and pinning in Archimedean tiling
substrates composed of square and triangular plaquettes. The two different
plaquettes become occupied at different vortex densities, producing
commensurate peaks in the magnetization at non-integer matching fields. We find
that as the field increases, in some cases the fraction of occupied pins can
decrease due to the competition between fillings of the different plaquette
types. We also identify a number of different types of vortex orderings as
function of field at integer and non-integer commensurate fillings.


title: Index conditions and cup-product maps on abelian varieties

abstract:
  We study questions surrounding cup-product maps which arise from pairs of
non-degenerate line bundles on an abelian variety. Important to our work is
Mumford's index theorem which we use to prove that non-degenerate line bundles
exhibit positivity analogous to that of ample line bundles. As an application
we determine the asymptotic behaviour of families of cup-product maps and prove
that vector bundles associated to these families are asymptotically globally
generated. To illustrate our results we provide several examples. For instance,
we construct families of cup-product problems which result in a zero map on a
one dimensional locus. We also prove that the hypothesis of our results can be
satisfied, in all possible instances, by a particular class of simple abelian
varieties. Finally, we discuss the extent to which Mumford's theta groups are
applicable in our more general setting.


title: Tree dynamics for peer-to-peer streaming

abstract:
  This paper presents an asynchronous distributed algorithm to manage multiple
trees for peer-to-peer streaming in a flow level model. It is assumed that
videos are cut into substreams, with or without source coding, to be
distributed to all nodes. The algorithm guarantees that each node receives
sufficiently many substreams within delay logarithmic in the number of peers.
The algorithm works by constantly updating the topology so that each substream
is distributed through trees to as many nodes as possible without interference.
Competition among trees for limited upload capacity is managed so that both
coverage and balance are achieved. The algorithm is robust in that it
efficiently eliminates cycles and maintains tree structures in a distributed
way. The algorithm favors nodes with higher degree, so it not only works for
live streaming and video on demand, but also in the case a few nodes with large
degree act as servers and other nodes act as clients.
  A proof of convergence of the algorithm is given assuming instantaneous
update of depth information, and for the case of a single tree it is shown that
the convergence time is stochastically tightly bounded by a small constant
times the log of the number of nodes. These theoretical results are
complemented by simulations showing that the algorithm works well even when
most assumptions for the theoretical tractability do not hold.


title: Edge-state instabilities of bosons in a topological band

abstract:
  In this work, we consider the dynamics of bosons in bands with non-trivial
topological structure. In particular, we focus on the case where bosons are
prepared in a higher-energy band and allowed to evolve. The Bogoliubov theory
about the initial state can have a dynamical instability, and we show that it
is possible to achieve the interesting situation where the topological edge
modes are unstable while all bulk modes are stable. Thus, after the initial
preparation, the edge modes will become rapidly populated. We illustrate this
with the Su-Schrieffer-Heeger model which can be realized with a double-well
optical lattice and is perhaps the simplest model with topological edge states.
This work provides a direct physical consequence of topological bands whose
properties are often not of immediate relevance for bosonic systems.


title:
Exact Results in Supersymmetric Field Theories on Manifolds with
  Boundaries

abstract:
  We construct supersymmetric gauge theories on some curved manifolds with
boundaries. Our examples include a part of three-sphere and a part of
two-sphere. We concentrate on Dirichlet boundary conditions. For these theories
on the manifolds with the boundaries, we compute the partition functions and
the Wilson loops exactly using the localization technique.


title:
Kashiwara Algebras and Imaginary Verma Modules for
  $U_q(\hat{\mathfrak{g}})$

abstract:
  We consider imaginary Verma modules for quantum affine algebra
  $U_q(\hat{\mathfrak{g}})$, where $\hat{\mathfrak{g}}$ is of type 1 i.e. of
non-twisted type, and construct Kashiwara type operators and the Kashiwara
algebra $\mathcal K_q$. We show that a certain quotient $\mathcal N_q^-$ of
  $U_q(\hat{\mathfrak{g}})$ is a simple $\mathcal K_q$-module.


title:
Predicting protein contact map using evolutionary and physical
  constraints by integer programming (extended version)

abstract:
  Motivation. Protein contact map describes the pairwise spatial and functional
relationship of residues in a protein and contains key information for protein
3D structure prediction. Although studied extensively, it remains very
challenging to predict contact map using only sequence information. Most
existing methods predict the contact map matrix element-by-element, ignoring
correlation among contacts and physical feasibility of the whole contact map. A
couple of recent methods predict contact map based upon residue co-evolution,
taking into consideration contact correlation and enforcing a sparsity
restraint, but these methods require a very large number of sequence homologs
for the protein under consideration and the resultant contact map may be still
physically unfavorable.
  Results. This paper presents a novel method PhyCMAP for contact map
prediction, integrating both evolutionary and physical restraints by machine
learning and integer linear programming (ILP). The evolutionary restraints
include sequence profile, residue co-evolution and context-specific statistical
potential. The physical restraints specify more concrete relationship among
contacts than the sparsity restraint. As such, our method greatly reduces the
solution space of the contact map matrix and thus, significantly improves
prediction accuracy. Experimental results confirm that PhyCMAP outperforms
currently popular methods no matter how many sequence homologs are available
for the protein under consideration. PhyCMAP can predict contacts within
minutes after PSIBLAST search for sequence homologs is done, much faster than
the two recent methods PSICOV and EvFold.
  See http://raptorx.uchicago.edu for the web server.

categories: q-bio.QM cs.CE cs.LG math.OC q-bio.BM stat.ML


title:
On the cyclic subgroup separability of the free product of two groups
  with commuting subgroups

abstract:
  Let G be the free product of groups A and B with commuting subgroups H
\leqslant A and K \leqslant B, and let C be the class of all finite groups or
the class of all finite p-groups. We derive the description of all C-separable
cyclic subgroups of G provided this group is residually a C-group. We prove, in
particular, that if A, B are finitely generated nilpotent groups and H, K are
p'-isolated in the free factors, then all p'-isolated cyclic subgroups of G are
separable in the class of all finite p-groups. The same statement is true
provided A, B are free and H, K are p'-isolated and cyclic.


title: Holography without strings?

abstract:
  A defining feature of holographic dualities is that, along with the bulk
equations of motion, boundary correlators at any given time t determine those
of observables deep in the bulk. We argue that this property emerges from the
bulk gravitational Gauss law together with bulk quantum entanglement as
embodied in the Reeh-Schlieder theorem. Stringy bulk degrees of freedom are not
required and play little role even when they exist. As an example we study a
toy model whose matter sector is a free scalar field. The energy density (\rho)
sources what we call a pseudo-Newtonian potential (\Phi) through Poisson's
equation on each constant time surface, but there is no back-reaction on the
matter. We show the Hamiltonian to be essentially self-adjoint on the domain
generated from the vacuum by acting with boundary observables localized in an
arbitrarily small neighborhood of the chosen time t. Since the Gauss law
represents the Hamiltonian as a boundary term, the model is holographic in the
sense stated above.


title: A New Heuristic Synchronizing Algorithm

abstract:
  We present a new heuristic algorithm finding reset words. The algorithm
called CutOff-IBFS is based on a simple idea of inverse breadth-first-search in
the power automaton. We perform an experimental investigation of effectiveness
compared to other algorithms existing in literature, which yields that our
method generally finds a shorter word in an average case and works well in
practice.


title: Measuring extended Higgs sectors as a consistent free couplings model

abstract:
  Extended Higgs sectors appear in many models for physics beyond the Standard
Model. Current Higgs measurements at the LHC are starting to significantly
constrain them. We study their Higgs coupling patterns at tree level as well as
including quantum corrections. Our benchmarks include a dark singlet-doublet
extension and several two-doublet setups. Using SFitter we translate the
current Higgs coupling measurements for one light Higgs state into their
respective parameter spaces. Finally, we show how two-Higgs-doublet models can
serve as a consistent ultraviolet completion of an assumed single
Standard-Model-like Higgs boson with free couplings.


title: A note on reflectionless Jacobi matrices

abstract:
  The property that a Jacobi matrix is reflectionless is usually characterized
either in terms of Weyl m-functions or the vanishing of the real part of the
boundary values of the diagonal matrix elements of the resolvent. We introduce
a characterization in terms of stationary scattering theory (the vanishing of
the reflection coefficients) and prove that this characterization is equivalent
to the usual ones. We also show that the new characterization is equivalent to
the notion of being dynamically reflectionless, thus providing a short proof of
an important result of [Breuer-Ryckman-Simon]. The motivation for the new
characterization comes from recent studies of the non-equilibrium statistical
mechanics of the electronic black box model and we elaborate on this
connection. To appear in Commun. Math. Phys.


title:
A Framework for the Analysis of Computational Imaging Systems with
  Practical Applications

abstract:
  Over the last decade, a number of Computational Imaging (CI) systems have
been proposed for tasks such as motion deblurring, defocus deblurring and
multispectral imaging. These techniques increase the amount of light reaching
the sensor via multiplexing and then undo the deleterious effects of
multiplexing by appropriate reconstruction algorithms. Given the widespread
appeal and the considerable enthusiasm generated by these techniques, a
detailed performance analysis of the benefits conferred by this approach is
important.
  Unfortunately, a detailed analysis of CI has proven to be a challenging
problem because performance depends equally on three components: (1) the
optical multiplexing, (2) the noise characteristics of the sensor, and (3) the
reconstruction algorithm. A few recent papers have performed analysis taking
multiplexing and noise characteristics into account. However, analysis of CI
systems under state-of-the-art reconstruction algorithms, most of which exploit
signal prior models, has proven to be unwieldy. In this paper, we present a
comprehensive analysis framework incorporating all three components.
  In order to perform this analysis, we model the signal priors using a
Gaussian Mixture Model (GMM). A GMM prior confers two unique characteristics.
Firstly, GMM satisfies the universal approximation property which says that any
prior density function can be approximated to any fidelity using a GMM with
appropriate number of mixtures. Secondly, a GMM prior lends itself to
analytical tractability allowing us to derive simple expressions for the
`minimum mean square error' (MMSE), which we use as a metric to characterize
the performance of CI systems. We use our framework to analyze several
previously proposed CI techniques, giving conclusive answer to the question:
`How much performance gain is due to use of a signal prior and how much is due
to multiplexing?


title: Polyhedra in spacetime from null vectors

abstract:
  We consider convex spacelike polyhedra oriented in Minkowski space. These are
the classical analogues of spinfoam intertwiners. We point out a
parametrization of these shapes using null face normals, with no constraints or
redundancies. Our construction is dimension-independent. In 3+1d, it provides
the spacetime picture behind a well-known property of the loop quantum gravity
intertwiner space in spinor form, namely that the closure constraint is always
satisfied after some SL(2,C) rotation. As a simple application of our
variables, we incorporate them in a 4-simplex action that reproduces the
large-spin behavior of the Barrett-Crane vertex amplitude.


title:
A STIS Atlas of CaII Triplet Absorption Line Kinematics in Galactic
  Nuclei

abstract:
  The relations observed between supermassive black holes and their host
galaxies suggest a fundamental link in the processes that cause these two
objects to evolve. A more comprehensive understanding of these relations could
be gained by increasing the number of supermassive black hole mass (M)
measurements. This can be achieved, in part, by continuing to model the stellar
dynamics at the centers of galactic bulges using data of the highest possible
spatial resolution. Consequently, we present here an atlas of galaxies in the
Space Telescope Imaging Spectrograph (STIS) data archive that may have spectra
suitable for new M estimates. Archived STIS G750M data for all non-barred
galactic bulges are co-aligned and combined, where appropriate, and the radial
signal-to-noise ratios calculated. The line-of-sight velocity distributions
from the CaII triplet are then determined using a maximum penalized likelihood
method. We find 19 out of 42 galaxies may provide useful new M estimates since
they are found to have data that is comparable in quality with data that has
been used in the past to estimate M. However, we find no relation between the
signal-to-noise ratio in the previously analyzed spectra and the uncertainties
of the black hole masses derived from the spectra. We also find that there is a
very limited number of appropriately observed stellar templates in the archive
from which to estimate the effects of template mismatching.


title: How Population Growth Affects Linkage Disequilibrium

abstract:
  Linkage disequilibrium (LD) is often summarized using the "LD curve," which
relates the LD between pairs of sites to the distance that separates them along
the chromosome. This paper shows how the LD curve responds to changes in
population size. An expansion of population size generates an LD curve that
declines steeply, especially if that expansion has followed a bottleneck. A
reduction in size generates an LD curve that is high but relatively flat. In
European data, the curve is steep, suggesting a history of population
expansion.
  These conclusions emerge from the study of $\sigma_d^2$, a measure of LD that
has never played a central role. It has been seen merely as an approximation to
another measure, $r^2$. Yet $\sigma_d^2$ has different dynamical behavior and
provides deeper time depth. Furthermore, it is easily estimated from data and
can be predicted from population history using a fast, deterministic algorithm.


title:
Cell-cycle regulated transcription associates with DNA replication
  timing in yeast and human

abstract:
  Eukaryotic DNA replication follows a specific temporal program, with some
genomic regions consistently replicating earlier than others, yet what
determines this program is largely unknown. Highly transcribed regions have
been observed to replicate in early S-phase in all plant and animal species
studied to date, but this relationship is thought to be absent from both
budding yeast and fission yeast. No association between cell-cycle regulated
transcription and replication timing has been reported for any species. Here I
show that in budding yeast, fission yeast, and human, the genes most highly
transcribed during S-phase replicate early, whereas those repressed in S-phase
replicate late. Transcription during other cell-cycle phases shows either the
opposite correlation with replication timing, or no relation. The relationship
is strongest near late-firing origins of replication, which is not consistent
with a previously proposed model -- that replication timing may affect
transcription -- and instead suggests a potential mechanism involving the
recruitment of limiting replication initiation factors during S-phase. These
results suggest that S-phase transcription may be an important determinant of
DNA replication timing across eukaryotes, which may explain the
well-established association between transcription and replication timing.


title:
A deterministic pseudorandom perturbation scheme for arbitrary
  polynomial predicates

abstract:
  We present a symbolic perturbation scheme for arbitrary polynomial geometric
predicates which combines the benefits of Emiris and Canny's simple randomized
linear perturbation scheme with Yap's multiple infinitesimal scheme for general
predicates. Like the randomized scheme, our method accepts black box polynomial
functions as input. For nonmaliciously chosen predicates, our method is as fast
as the linear scheme, scaling reasonably with the degree of the polynomial even
for fully degenerate input. Like Yap's scheme, the computed sign is
deterministic, never requiring an algorithmic restart (assuming a high quality
pseudorandom generator), and works for arbitrary predicates with no knowledge
of their structure. We also apply our technique to exactly or nearly exactly
rounded constructions that work correctly for degenerate input, using
l'Hopital's rule to compute the necessary singular limits. We provide an open
source prototype implementation including example algorithms for Delaunay
triangulation and Boolean operations on polygons and circular arcs in the
plane.


title: Exotic Leptons: Higgs, Flavor and Collider Phenomenology

abstract:
  We study extensions of the standard model by one generation of vector-like
leptons with non-standard hypercharges, which allow for a sizable modification
of the h -> gamma gamma decay rate for new lepton masses in the 300 GeV - 1 TeV
range. We analyze vaccum stability implications for different hypercharges.
Effects in h -> Z gamma are typically much smaller than in h -> gamma gamma,
but distinct among the considered hypercharge assignments. Non-standard
hypercharges constrain or entirely forbid possible mixing operators with
standard model leptons. As a consequence, the leading contributions to the
experimentally strongly constrained electric dipole moments of standard model
fermions are only generated at the two loop level by the new CP violating
sources of the considered setups. We derive the bounds from dipole moments,
electro-weak precision observables and lepton flavor violating processes, and
discuss their implications. Finally, we examine the production and decay
channels of the vector-like leptons at the LHC, and find that signatures with
multiple light leptons or taus are already probing interesting regions of
parameter space.


title:
Probability of observing a number of unfolding events while stretching
  poly-proteins

abstract:
  The mechanical stretching of single poly-proteins is an emerging tool for the
study of protein (un)folding, chemical catalysis and polymer physics at the
single molecule level. The observed processes i.e unfolding or reduction
events, are typically considered to be stochastic and by its nature are
susceptible to be censored by the finite duration of the experiment. Here we
develop a formal analytical and experimental description on the number of
observed events under various conditions of practical interest. We provide a
rule of thumb to define the experiment protocol duration. Finally we provide a
methodology to accurately estimate the number of stretched molecules based on
the number of observed unfolding events. Using this analysis on experimental
data we conclude for the first time that poly-ubiquitin binds at a random
position both to the substrate and to the pulling probe and that observing all
the existing modules is the less likely event.


title:
Absolute absorption and fluorescence measurements over a dynamic range
  of 10$^6$ with cavity-enhanced laser-induced fluorescence

abstract:
  We describe a novel experimental setup that combines the advantages of both
laser-induced fluorescence and cavity ring-down techniques. The simultaneous
and correlated measurement of the ring-down and fluorescence signals yields
absolute absorption coefficients for the fluorescence measurement. The combined
measurement is conducted with the same sample in a single, pulsed laser beam.
The fluorescence measurement extends the dynamic range of a stand-alone cavity
ring-down setup from typically three to at least six orders of magnitude. The
presence of the cavity improves the quality of the signal, in particular the
signal-to-noise ratio. The methodology, dubbed cavity-enhanced laser-induced
fluorescence (CELIF), is developed and rigorously tested against the
spectroscopy of 1,4-bis(phenylethynyl)benzene in a molecular beam and density
measurements in a cell. We outline how the method can be utilised to determine
absolute quantities: absorption cross sections, sample densities and
fluorescence quantum yields.


title: On the Dynamics and Origin of Haumea's Moons

abstract:
  The dwarf planet Haumea has two large satellites, Namaka and Hi'iaka, which
orbit at relatively large separations. Both moons have significant
eccentricities and inclinations, in a pattern that is consistent with a past
orbital resonance (Ragozzine and Brown, 2009). Based on our analysis, we find
that the present system is not consistent with satellite formation close to the
primary and tidal evolution though mean-motion resonances. We propose that
Namaka experienced only limited tidal evolution, leading to the mutual 8:3
mean-motion resonance which redistributed eccentricities and inclinations
between the moons. This scenario requires that the original orbit of Hi'iaka
was mildly eccentric; we propose that this eccentricity was either primordial
or acquired though encounters with other TNOs. Both dynamical stability and our
preferred tidal evolution model imply that the moons' masses are only about one
half of previously estimated values, suggesting high albedos and low densities.
As the present orbits of the moons strongly suggest formation from a flat disk
close to their present locations, we conclude that Hi'iaka and Namaka may be
second-generation moons, formed after the breakup of a past large moon,
previously proposed as the parent body of the Haumea family (Schlichting and
Sari, 2009). We derive plausible parameters of that moon, consistent with the
current models of Haumea's formation (Leinhardt et al, 2010). An interesting
implication of this hypothesis is that Hi'iaka and Namaka may orbit retrograde
with respect to Haumea's spin. Retrograde orbits of Haumea's moons would be in
full agreement with available observations and our dynamical analysis, and
could provide a unique confirmation the "disrupted satellite" scenario for the
origin of the family.


title:
Dramatic changes in electronic structure revealed by fractionally
  charged nuclei

abstract:
  Discontinuous changes in the electronic structure upon infinitesimal changes
to the Hamiltonian are demonstrated. Remarkably, these are revealed in one and
two electron molecular systems if the realm of the nuclear charge is extended
to be fractional. Dramatic changes in the electron density from full
configuration interaction are observed in real space illustrating key
intricacies of electronic structure including the transfer, hopping and removal
of electrons. Physically, this is due to the particle nature of electrons and
manifests itself theoretically as a diverging linear density response function
or an energy derivative discontinuity that occurs at constant number of
electrons. This is essential to correctly describe real physical processes,
from chemical reactions to electron transport and metal-insulator transitions.
The dramatic errors of DFT are seen in real space as this physics is missing
from currently used approximations and poses a great challenge for the
development of new electronic structure methods.


title: Imprints of spin-orbit density wave in the hidden order state of URu2Si2

abstract:
  The mysterious second order quantum phase transition, commonly attributed to
the `hidden-order' (HO) state, in heavy-fermion metal URu2Si2 exhibits a number
of paradoxical electronic and magnetic properties which cannot be associated
with any conventional order parameter. We characterize and reconcile these
exotic properties of the HO state based on a spin-orbit density wave order
(SODW), constructed on the basis of a realistic density-functional theory (DFT)
band structure. We quantify the nature of the gapped electronic and magnetic
excitation spectrum, in agreement with measurements, while the magnetic moment
is calculated to be zero owing to the spin-orbit coupling induced time-reversal
invariance. Furthermore, a new collective mode in the spin-1 excitation
spectrum is predicted to localize at zero momentum transfer in the HO state
which can be visualized, for example, by electron spin resonance (ESR) at zero
magnetic field or polarized inelastic neutron scattering measurements. The
results demonstrate that the concomitant broken and invariant symmetries
protected SODW order not only provides insights into numerous nontrivial
hidden-order phenomena, but also offers a parallel laboratory to the formation
of a topologically protected quantum state beyond the quantum spin-Hall state
and Weyl semimetals.


title:
Throughput Optimality and Overload Behavior of Dynamical Flow Networks
  under Monotone Distributed Routing

abstract:
  The paper investigates the throughput behavior of single-commodity dynamical
flow networks governed by monotone distributed routing policies. The networks
are modeled as systems of ODEs based on mass conversation laws on directed
graphs with limited flow capacities on the links and constant external inflows
at certain origin nodes. Under monotonicity assumptions on the routing
policies, it is proven that a globally asymptotically stable equilibrium exists
so that the network achieves maximal throughput, provided that no cut capacity
constraint is violated by the external inflows. On the contrary, should such a
constraint be violated, the network overload behavior is characterized. In
particular, it is established that there exists a cut with respect to which the
flow densities on every link grow linearly over time (resp. reach their
respective limits simultaneously) in the case where the buffer capacities are
infinite (resp. finite). The results employ an $l_1$-contraction principle for
monotone dynamical systems.


title: Geant4 - Current and Future : A Snowmass 2013 White Paper

abstract:
  The US involvement in Geant4 started with its adoption by the BaBar
experiment at SLAC in 1997 and the subsequent creation of a group at SLAC
supporting BaBar and contributing to Geant4 development. SLAC has provided the
leadership of the international Geant4 Collaboration for the recent years and
carries major responsibilities for evolutionary development of the existing
code with work to implement multithreading and explore new application domains
as well as new technologies such as GPUs. This paper presents the current and
the future developments being carried by the SLAC Geant4 team.


title: Predicting Trends in Social Networks via Dynamic Activeness Model

abstract:
  With the effect of word-of-the-mouth, trends in social networks are now
playing a significant role in shaping people's lives. Predicting dynamic trends
is an important problem with many useful applications. There are three dynamic
characteristics of a trend that should be captured by a trend model: intensity,
coverage and duration. However, existing approaches on the information
diffusion are not capable of capturing these three characteristics. In this
paper, we study the problem of predicting dynamic trends in social networks. We
first define related concepts to quantify the dynamic characteristics of trends
in social networks, and formalize the problem of trend prediction. We then
propose a Dynamic Activeness (DA) model based on the novel concept of
activeness, and design a trend prediction algorithm using the DA model. Due to
the use of stacking principle, we are able to make the prediction algorithm
very efficient. We examine the prediction algorithm on a number of real social
network datasets, and show that it is more accurate than state-of-the-art
approaches.


title: X - Ray Flares and Their Connection With Prompt Emission in GRBs

abstract:
  We use a wavelet technique to investigate the time variations in the light
curves from a sample of GRBs detected by Fermi and Swift. We focus primarily on
the behavior of the flaring region of Swift-XRT light curves in order to
explore connections between variability time scales and pulse parameters (such
as rise and decay times, widths, strengths, and separation distributions) and
spectral lags. Tight correlations between some of these temporal features
suggest a common origin for the production of X-ray flares and the prompt
emission.


title:
Energy-density-functional calculations including the proton-neutron
  mixing

abstract:
  We present results of calculations based on the Skyrme energy density
functional including the arbitrary mixing between protons and neutrons. In this
framework, single-particle states are superpositions of proton and neutron
components and the energy density functional is fully invariant with respect to
three-dimensional rotations in the isospin space. The isospin of the system is
controlled by means of the isocranking method, which carries over the standard
cranking approach to the isospin space. We show numerical results of the
isocranking calculations performed for isobaric analogue states in the A=14 and
$A=40-56$ nuclei. We also present such results obtained for high-isospin states
in $^{48}$Cr, with constraints on the isospin implemented by using the
augmented Lagrange method.


title: Connected Hopf algebras and iterated Ore extensions

abstract:
  We investigate when a skew polynomial extension T = R[x; {\sigma}, {\delta}]
of a Hopf algebra R admits a Hopf algebra structure, substantially generalising
a theorem of Panov. When this construction is applied iteratively in
characteristic 0 one obtains a large family of connected noetherian Hopf
algebras of finite Gelfand-Kirillov dimension, including for example all
enveloping algebras of finite dimensional solvable Lie algebras and all
coordinate rings of unipotent groups. The properties of these Hopf algebras are
investigated.


title: Some stable homology calculations and Occam's razor for Hodge structures

abstract:
  Motivated by motivic zeta function calculations, Vakil and Wood in [VMW12]
made several conjectures regarding the topology of subspaces of symmetric
products. The purpose of this note is to prove two of these conjectures and
disprove a strengthening of one of them.


title:
The Effect of Structural Conformational Changes on Charge Transfer
  States in a Light-Harvesting Carotenoid-diaryl-Porphyrin-C60 Molecular Triad

abstract:
  We present a detailed study of charge transfer (CT) excited states for a
large number of structural conformations in a light-harvesting
Carotenoid-diaryl-Porphyrin-C60 (CPC60) molecular triad. The molecular triad
undergoes a photoinduced charge transfer process exhibiting a large excited
state dipole moment, making it suitable for application to molecular-scale
opto-electronic devices. An important consideration is that the conformational
flexibility of the CPC 60 triad impacts its dynamics in solvents. Since
experimentally measured dipole moments for the triad of ~110 Debye (D) and ~160
Debye strongly indicate a range in conformational variability for the triad in
the excited state, studying the effect of conformational changes on the CT
excited state energetics furthers the understanding of its charge transfer
states. We have calculated the lowest CT excited state energies for a series of
14 triad conformers, where the structural conformations were generated by
incrementally scanning a 360 degree torsional (dihedral) twist at the
C60-porhyrin linkage and the porphyrin-carotenoid linkage. Additionally, five
different CPC60 conformations were studied to determine the effect of
pi-conjugation and particle-hole Coulombic attraction on the CT excitation
energies. Our calculations show that structural conformational changes in the
triad show a variation of ~0.4 eV in CT excited state energies in the
gas-phase. The corresponding calculated excited state dipoles show a range of
88 D - 188 D.


title:
Substituent-level Tuning of Frontier Orbital Energy Levels in
  Phthalocyanine/C60 Donor-Acceptor Charge Transfer Pairs

abstract:
  We have calculated several low-lying Charge Transfer (CT) excited-state
energies for four non-covalently bound dyads composed of a sulfonated-ZnPc
coupled to C60. Our results show that the di- and tri-sulfonated systems yield
a CT state as the lowest-energy excited state in the system. In contrast, an
energy re-ordering for the tetra-sulfonated ZnPc system leads to local
excitations lying lower in energy than the CT state, displaying a possible
deactivation pathway obstructing charge separation. Since several different
donor-acceptor relative orientations may co-exist at an organic heterojunction,
we compare the energetics of a few low-lying CT states for the end-on geometry
of a di-sulfonated system to its co-facial orientation counterpart. The
calculated CT excitation energies are larger for the end-on orientation in
comparison to the co-facial structure by ~1.5 eV, which results principally
from a substantial decrease in exciton binding energy in going from the
co-facial to the end-on orientation. Furthermore, changes in relative
donor-acceptor orientation have a larger impact on the CT energies than changes
in donor-acceptor distance. TDDFT calculations on the various sulfonated ZnPc
donor molecules show a significant splitting of the Q-band for only one of the
four donor systems. Our present calculations, in line with previous
experimental studies, show that the systematic variation of chemical functional
groups is a promising avenue for the substituent-level tuning of various
physical properties of organic semiconductors.


title:
Taking A Free Ride for Routing Topology Inference in Peer-to-Peer
  Networks

abstract:
  A Peer-to-Peer (P2P) network can boost its performance if peers are provided
with underlying network-layer routing topology. The task of inferring the
network-layer routing topology and link performance from an end host to a set
of other hosts is termed as network tomography, and it normally requires host
computers to send probing messages. We design a passive network tomography
method that does not requires any probing messages and takes a free ride over
data flows in P2P networks. It infers routing topology based on end-to-end
delay correlation estimation (DCE) without requiring any synchronization or
cooperation from the intermediate routers. We implement and test our method in
the real world Internet environment and achieved the accuracy of 92% in
topology recovery. We also perform extensive simulation in OMNet++ to evaluate
its performance over large scale networks, showing that its topology recovery
accuracy is about 95% for large networks.


title:
Link Failure Recovery over Very Large Arbitrary Networks: The Case of
  Coding

abstract:
  Network coding-based link failure recovery techniques provide near-hitless
recovery and offer high capacity efficiency. Diversity coding is the first
technique to incorporate coding in this field and is easy to implement over
small arbitrary networks. However, its capacity efficiency is restricted by its
systematic coding and high design complexity even though its design complexity
is lower than the other coding-based recovery techniques. Alternative
techniques mitigate some of these limitations, but they are difficult to
implement over arbitrary networks. In this paper, we propose a simple column
generation-based design algorithm and a novel advanced diversity coding
technique to achieve near-hitless recovery over arbitrary networks. The design
framework consists of two parts: a main problem and subproblem. Main problem is
realized with Linear Programming (LP) and Integer Linear Programming (ILP),
whereas the subproblem can be realized with different methods. The simulation
results suggest that both the novel coding structure and the novel design
algorithm lead to higher capacity efficiency for near-hitless recovery. The
novel design algorithm simplifies the capacity placement problem which enables
implementing diversity coding-based techniques on very large arbitrary
networks.


title: Scale breaking and fluid dynamics in a dilute two-dimensional Fermi gas

abstract:
  We study two observables related to the anomalous breaking of scale
invariance in a dilute two dimensional Fermi gas, the frequency shift and
damping rate of the monopole mode in a harmonic confinement potential. For this
purpose we compute the speed of sound and the bulk viscosity of the two
dimensional gas in the high temperature limit. We show that the anomaly in the
speed of sound scales as $(2P-\rho c_s^2)/P\sim z/[\log(T/E_B)]^2$, and that
the bulk viscosity $\zeta$ scales as $\zeta/\eta \sim z^2/[\log(T/E_B)]^6$.
Here, $P$ is the pressure, $c_s^2$ is the speed of sound, $\eta$ is the shear
viscosity, $z$ is the fugacity, and $E_B$ is the two-body binding energy. We
show that our results are consistent with the experimental results of Vogt et
al. [Phys. Rev. Lett. 108, 070404 (2012)]. Vogt et al. reported a frequency
shift $\delta\omega/\omega$ of the order of a few percent, and a damping rate
smaller than the background rate $\Gamma/\omega_0\sim 5%$.


title:
Efficient nonlinear generation of THz plasmons in graphene and
  topological insulators

abstract:
  Surface plasmons in graphene may provide an attractive alternative to
noble-metal plasmons due to their tighter confinement, peculiar dispersion, and
longer propagation distance. We present theoretical studies of the nonlinear
difference frequency generation of terahertz surface plasmon modes supported by
two-dimensional layers of massless Dirac electrons, which includes graphene and
surface states in topological insulators. Our results demonstrate strong
enhancement of the DFG efficiency near the plasmon resonance and the
feasibility of phase-matched nonlinear generation of plasmons over a broad
range of frequencies.


title: Keck Observations of 160 Gamma-Ray Burst Host Galaxies

abstract:
  We present a preliminary data release from our multi-year campaign at Keck
Observatory to study the host galaxies of a large sample of Swift-era gamma-ray
bursts via multi-color ground-based optical imaging and spectroscopy. With over
160 targets observed to date (and almost 100 host detections, most of which
have not previously been reported in the literature) our effort represents the
broadest GRB host survey to date. While targeting was heterogeneous, our
observations span the known diversity of GRBs including short bursts, long
bursts, spectrally soft GRBs (XRFs), ultra-energetic GRBs, X-ray faint GRBs,
dark GRBs, SN-GRBs, and other sub-classes. We also present a preview of our
database (currently available online via a convenient web interface) including
a catalog of multi-color photometry, redshifts and line ID's. Final photometry
and reduced imaging and spectra will be available in the near future.


title:
MicroRNAs Implicated in Dysregulation of Gene Expression Following Human
  Lung Transplantation

abstract:
  Lung transplantation remains the only viable treatment option for the
majority of patients with advanced lung diseases. However, 5-year
post-transplant survival rates remain low primarily secondary to chronic
rejection. Novel insights from global gene expression profiles may provide
molecular phenotypes and therapeutic targets to improve outcomes after lung
transplantation. We showed the presence of a significant number of dysregulated
genes, particularly those genes involved in pathways and biological processes
such as immune response and defense, in the PBMCs derived from a cohort of
patients after lung transplantation. The contribution of miRNAs in regulating
these differential genes was also demonstrated.


title: Extended Techniques for Feedback Control of A Single Qubit

abstract:
  The protection of quantum states is challenging for non-orthogonal states
especially in the presence of noises. The recent research breakthrough shows
that this difficulty can be overcome by feedback control with weak
measurements. However, the state-protection schemes proposed recently work
optimally only for special quantum states. In this paper, {by applying
different weak measurements, we extend the idea of the state-protection scheme
to protect general states.} We calculate numerically the optimal parameters and
discuss the performance of the scheme. Comparison between this extended scheme
and the earlier scheme is also presented.


title: Social distancing strategies against disease spreading

abstract:
  The recurrent infectious diseases and their increasing impact on the society
has promoted the study of strategies to slow down the epidemic spreading. In
this review we outline the applications of percolation theory to describe
strategies against epidemic spreading on complex networks. We give a general
outlook of the relation between link percolation and the
susceptible-infected-recovered model, and introduce the node void percolation
process to describe the dilution of the network composed by healthy individual,
$i.e$, the network that sustain the functionality of a society. Then, we survey
two strategies: the quenched disorder strategy where an heterogeneous
distribution of contact intensities is induced in society, and the intermittent
social distancing strategy where health individuals are persuaded to avoid
contact with their neighbors for intermittent periods of time. Using
percolation tools, we show that both strategies may halt the epidemic
spreading. Finally, we discuss the role of the transmissibility, $i.e$, the
effective probability to transmit a disease, on the performance of the
strategies to slow down the epidemic spreading.


title: Toric Polynomial Generators of Complex Cobordism

abstract:
  Although it is well-known that the complex cobordism ring is a polynomial
ring $\Omega_{*}^{U}\cong\mathbb{Z}\left[\alpha_{1},\alpha_{2},\ldots\right]$,
an explicit description for convenient generators
$\alpha_{1},\alpha_{2},\ldots$ has proven to be quite elusive. The focus of the
following is to construct complex cobordism polynomial generators in many
dimensions using smooth projective toric varieties. These generators are very
convenient objects since they are smooth connected algebraic varieties with an
underlying combinatorial structure that aids in various computations. By
applying certain torus-equivariant blow-ups to a special class of smooth
projective toric varieties, such generators can be constructed in every complex
dimension that is odd or one less than a prime power. A large amount of
evidence suggests that smooth projective toric varieties can serve as
polynomial generators in the remaining dimensions as well.


title: Waveguide QED: controllable channel from quantum interference

abstract:
  We study a waveguide QED system with a rectangular waveguide and a two-level
system (TLS) inside, where the transverse modes TMmn define the quantum
channels of guided photons. It is discovered that the loss of photons in the
TM11 channel into the others can be overcome by replacing it with a certain
coherent superposition of TMmn channels, which is named as the controllable
channel (CC) as the photons in CC can be perfectly reflected or transmitted by
the TLS, and never lost into the other channels. The dark state emerges when
the photon is incident from one of the scattering-free channels (SFCs)
orthogonal to CC. The underlying physics mechanism is the multi-channel
interference associated with Fano resonance.


title:
Estimation of genomic characteristics by analyzing k-mer frequency in de
  novo genome projects

abstract:
  Background: With the fast development of next generation sequencing
technologies, increasing numbers of genomes are being de novo sequenced and
assembled. However, most are in fragmental and incomplete draft status, and
thus it is often difficult to know the accurate genome size and repeat content.
Furthermore, many genomes are highly repetitive or heterozygous, posing
problems to current assemblers utilizing short reads. Therefore, it is
necessary to develop efficient assembly-independent methods for accurate
estimation of these genomic characteristics. Results: Here we present a
framework for modeling the distribution of k-mer frequency from sequencing data
and estimating the genomic characteristics such as genome size, repeat
structure and heterozygous rate. By introducing novel techniques of k-mer
individuals, float precision estimation, and proper treatment of sequencing
error and coverage bias, the estimation accuracy of our method is significantly
improved over existing methods. We also studied how the various genomic and
sequencing characteristics affect the estimation accuracy using simulated
sequencing data, and discussed the limitations on applying our method to real
sequencing data. Conclusion: Based on this research, we show that the k-mer
frequency analysis can be used as a general and assembly-independent method for
estimating genomic characteristics, which can improve our understanding of a
species genome, help design the sequencing strategy of genome projects, and
guide the development of assembly algorithms. The programs developed in this
research are written using C/C++, and freely accessible at Github URL
(https://github.com/fanagislab/GCE) or BGI ftp (
ftp://ftp.genomics.org.cn/pub/gce).


title: Min-Max Design of FIR Digital Filters by Semidefinite Programming

abstract:
  In this article we consider two problems: FIR (Finite Impulse Response)
approximation of IIR (Infinite Impulse Response) filters and inverse FIR
filtering of FIR or IIR filters. By means of Kalman-Yakubovich-Popov (KYP)
lemma and its generalization (GKYP), the problems are reduced to semidefinite
programming described in linear matrix inequalities (LMIs). MATLAB codes for
these design methods are given. An design example shows the effectiveness of
these methods.


title: Tunneling spectroscopy of topological superconductors

abstract:
  Tunneling conductance spectra of normal metal/insulator/superconductor
(N/I/S) junctions are calculated to determine the potential of tunneling
spectroscopy in investigations of topological superconductivity. Peculiar
feature of topological superconductors is the formation of gapless edge states
in them. Since the conductance of N/I/S junctions is sensitive to the formation
of these edge states, topological superconductivity can be identified through
edge-state detection. Herein, the effects of Fermi surface anisotropy and an
applied magnetic field on the conductance spectra are analyzed to gather
indications that can help to identify the topological nature of actual
materials.


title:
Role of social environment and social clustering in spread of opinions
  in co-evolving networks

abstract:
  Taking a pragmatic approach to the processes involved in the phenomena of
collective opinion formation, we investigate two specific modifications to the
co-evolving network voter model of opinion formation, studied by Holme and
Newman [1]. First, we replace the rewiring probability parameter by a
distribution of probability of accepting or rejecting opinions between
individuals, accounting for the asymmetric influences in relationships among
individuals in a social group. Second, we modify the rewiring step by a
path-length-based preference for rewiring that reinforces local clustering. We
have investigated the influences of these modifications on the outcomes of the
simulations of this model. We found that varying the shape of the distribution
of probability of accepting or rejecting opinions can lead to the emergence of
two qualitatively distinct final states, one having several isolated connected
components each in internal consensus leading to the existence of diverse set
of opinions and the other having one single dominant connected component with
each node within it having the same opinion. Furthermore, and more importantly,
we found that the initial clustering in network can also induce similar
transitions. Our investigation also brings forward that these transitions are
governed by a weak and complex dependence on system size. We found that the
networks in the final states of the model have rich structural properties
including the small world property for some parameter regimes. [1] P. Holme and
M. Newman, Phys. Rev. E 74, 056108 (2006).


title:
Challenges and opportunities for applications of unconventional
  superconductors

abstract:
  Since the discovery of high-$T_c$ cuprates the quest for new superconductors
has shifted toward more anisotropic, strongly correlated materials with lower
carrier densities and competing magnetic and charge density wave orders. While
these materials features enhance superconducting correlations, they also result
in serious problems for applications at liquid nitrogen (and higher)
temperatures and strong magnetic fields, so that such conventional
characteristics as the critical temperature $T_c$ and the upper critical field
$H_{c2}$ are no longer the main parameters of merit. This happens because of
strong fluctuations of the order parameter, thermally-activated hopping of
pinned vortices and electromagnetic granularity, as has been established after
extensive investigations of cuprates and Fe-based superconductors. In this
paper I give an overview of these mechanisms crucial for power and magnet
applications and discuss the materials restrictions which have to be satisfied
in order to make superconductors useful at high temperatures and magnetic
fields. These restrictions become more and more essential at higher
temperatures and magnetic fields, particularly for the yet-to-be-discovered
superconductors operating at room temperatures. In this case the performance of
superconductors will be limited by destructive fluctuations of the order
parameter so higher superfluid density and weaker electronic anisotropy which
reduce these fluctuations can become far more important than higher $T_c$.


title:
Occultation of the T Tauri Star RW Aurigae A by its Tidally Disrupted
  Disk

abstract:
  RW Aur A is a classical T Tauri star, believed to have undergone a
reconfiguration of its circumstellar environment as a consequence of a recent
fly-by of its stellar companion, RW Aur B. This interaction stripped away part
of the circumstellar disk of RW Aur A, leaving a tidally disrupted arm and a
short truncated circumstellar disk. We present photometric observations of the
RW Aur system from the Kilodegree Extremely Little Telescope (KELT) survey
showing a long and deep dimming that occurred from September 2010 until March
2011. The dimming has a depth of ~2 magnitudes, a duration of ~180 days and was
confirmed by archival observations from American Association of Variable Star
Observers (AAVSO). We suggest that this event is the result of a portion of the
tidally disrupted disk occulting RW Aur A, specifically a fragment of the
tidally disrupted arm. The calculated transverse linear velocity of the
occulter is in excellent agreement with the measured relative radial velocity
of the tidally disrupted arm. Using simple kinematic and geometric arguments,
we show that the occulter cannot be a feature of the RW Aur A circumstellar
disk, and we consider and discount other hypotheses. We also place constraints
on the thickness and semi-major axis of the portion of the arm that occulted
the star.


title:
Stationary Distributions for Retarded Stochastic Differential Equations
  without Dissipativity

abstract:
  Retarded stochastic differential equations (SDEs) constitute a large
collection of systems arising in various real-life applications. Most of the
existing results make crucial use of dissipative conditions. Dealing with "pure
delay" systems in which both the drift and the diffusion coefficients depend
only on the arguments with delays, the existing results become not applicable.
This work uses a variation-of-constants formula to overcome the difficulties
due to the lack of the information at the current time. This paper establishes
existence and uniqueness of stationary distributions for retarded SDEs that
need not satisfy dissipative conditions. The retarded SDEs considered in this
paper also cover SDEs of neutral type and SDEs driven by L\'{e}vy processes
that might not admit finite second moments.


title:
Unravelling the quantum-entanglement effect of noble gas coordination on
  the spin ground state of CUO

abstract:
  The accurate description of the complexation of the CUO molecule by Ne and Ar
noble gas matrices represents a challenging task for present-day quantum
chemistry. Especially, the accurate prediction of the spin ground state of
different CUO--noble-gas complexes remains elusive. In this work, the
interaction of the CUO unit with the surrounding noble gas matrices is
investigated in terms of complexation energies and dissected into its molecular
orbital quantum entanglement patterns. Our analysis elucidates the anticipated
singlet--triplet ground-state reversal of the CUO molecule diluted in different
noble gas matrices and demonstrates that the strongest uranium-noble gas
interaction is found for CUOAr4 in its triplet configuration.


title: Local Systems on Classical Nilpotent Orbits and Maximal Length Elements

abstract:
  It is known that there is a bijection between dominant weights of a complex
reductive Lie group $G$ and the set $\mathcal{N}_{\mathcal{O},r}$ whose
elements are of the form $(\mathcal{O},\rho)$, where $\mathcal{O}$ is a
nilpotent orbit and $\rho$ is an irreducible, algebraic representation of the
stabilizer group $G^e$ of an element $e$ in the nilpotent orbit $\mathcal{O}$.
We would like to study the above bijection when $G$ is classical and $\rho$
corresponds to a local system of $\mathcal{O}$. In particular, we will prove
Conjecture 3.1 in \cite{AS} and Conjecture 7.4' in \cite{Ac2} in the classical
setting.


title: Uniform electron gas at finite temperatures

abstract:
  We calculate the free energy of the quantum uniform electron gas for
temperatures from near zero to 100 times the Fermi energy, approaching the
classical limit. An extension of the Vashista-Singwi theory to finite
temperatures and self-consistent compressibility sum rule is presented.
Comparisons are made to other local field correction methods, as well as recent
quantum Monte Carlo simulation and classical map based results. Accurate fits
to the exchange-correlation free energy from both theory and simulation are
given for future practical applications.


title: Non-classical paths in interference experiments

abstract:
  In a double slit interference experiment, the wave function at the screen
with both slits open is not exactly equal to the sum of the wave functions with
the slits individually open one at a time. The three scenarios represent three
different boundary conditions and as such, the superposition principle should
not be applicable. However, most well known text books in quantum mechanics
implicitly and/or explicitly use this assumption which is only approximately
true. In our present study, we have used the Feynman path integral formalism to
quantify contributions from non-classical paths in quantum interference
experiments which provide a measurable deviation from a naive application of
the superposition principle. A direct experimental demonstration for the
existence of these non-classical paths is hard. We find that contributions from
such paths can be significant and we propose simple three-slit interference
experiments to directly confirm their existence.


title:
Exciton dynamics in atomically thin MoS2: inter-excitonic interaction
  and broadening kinetics

abstract:
  We report ultrafast pump-probe spectroscopy examining exciton dynamics in
atomically thin MoS2. Spectrally- and temporally-resolved measurements are
performed to investigate the interaction dynamics of two important direct-gap
excitons (A and B) and their associated broadening kinetics. The two excitons
show strongly correlated inter-excitonic dynamic, in which the transient
blue-shifted excitonic absorption originates from the internal A-B excitonic
interaction. The observed complex spectral response is determined by the
exciton collision-induced linewidth broadening; the broadening of the B exciton
linewidth in turn lowers the peak spectral amplitude of the A exciton. Resonant
excitation at the B exciton energy reveals that inter-excitonic scattering
plays a more important role in determining the broadening kinetics than
free-carrier scattering.


title:
The Axis-Symmetric Ring Galaxies: AM 0053-353, AM 0147-350, AM 1133-245,
  AM 1413-243, AM 2302-322, ARP 318, and Head-On Penetrations

abstract:
  Axis-symmetric ring systems can be identified from the new catalog of
collisional ring galaxies in Madore et al. (2009). These are O-type-like
collisional ring galaxies. Head-on collisions by dwarf galaxies moving along
the symmetric axis were performed through N-body simulations to address their
origins. It was found that the simulations with smaller initial relative
velocities between two galaxies, or the cases with heavier dwarf galaxies,
could produce rings with higher density contrasts. There are more than one
generation of rings in one collision and the lifetime of any generation of
rings is about one dynamical time. It was concluded that head-on penetrations
could explain these O-type-like ring galaxies identified from the new catalog
in Madore et al. (2009), and the simulated rings resembling the observational
O-type-like collisional rings are those at the early stage of one of the
ring-generations.


title:
Electromagnetic Shower Properties in a Lead-Scintillator Sampling
  Calorimeter

abstract:
  The Collider Detector at Fermilab (CDF) is a general-purpose experimental
apparatus with an inner tracking detector for measuring charged particles,
surrounded by a calorimeter for measurements of electromagnetic and hadronic
showers. We describe a {\sc geant4} simulation and parameterization of the
response of the CDF central electromagnetic calorimeter (CEM) to incident
electrons and photons. The detector model consists of a detailed description of
the CEM geometry and material in the direction of the incident particle's
trajectory, and of the passive material between the tracker and the CEM. We use
{\sc geant4} to calculate the distributions of: the energy that leaks from the
back of the CEM, the energy fraction sampled by the scintillators, and the
energy dependence of the response. We parameterize these distributions to
accurately model electron and photon response and resolution in a custom
simulation for the measurement of the $W$ boson mass.


title:
Logarithmic bump conditions for Calder\'on-Zygmund Operators on spaces
  of homogeneous type

abstract:
  We establish two-weight norm inequalities for singular integral operators
defined on spaces of homogeneous type. We do so first when the weights satisfy
a double bump condition and then when the weights satisfy separated logarithmic
bump conditions. Our results generalize recent work on the Euclidean case, but
our proofs are simpler even in this setting. The other interesting feature of
our approach is that we are able to prove the separated bump results (which
always imply the corresponding double bump results) as a consequence of the
double bump theorem.


title: Symmetric Toeplitz-Structured Compressed Sensing Matrices

abstract:
  How to construct a suitable measurement matrix is still an open question in
compressed sensing. A significant part of the recent work is that the
measurement matrices are not completely random on the entries but exhibit
considerable structure. In this paper, we proved that the symmetric Toeplitz
matrix and its transforms can be used as measurement matrix and recovery signal
with high probability. Compared with random matrices (e.g. Gaussian and
Bernullio matrices) and some structured matrices (e.g. Toeplitz and circulant
matrices), we need to generate fewer independent entries to obtain the
measurement matrix while the effectiveness of recovery does not get worse.
Furthermore, the signal can be recovered more efficiently by the algorithm.


title:
Vortex Solutions and a Novel Role for R-parity in an N=2-Supersymmetric
  Model for Graphene

abstract:
  In a previous work, we have been able to settle Jackiw's et al. chiral gauge
theory for Dirac fermions in graphene in an N=1 supersymmetric framework, using
a tau3-QED prescription, defined by means of a single pair of gauge charged
superfields, but without preserving a global phase symmetry associated to the
electric charge. In the present work, we propose another N=1-generalisation
which indeed preserves this symmetry, namely, a straightforward extension built
upon a set of two pairs of (chiral) gauge-charged superfields plus an extra
pair of electrically neutral superfields. We then further proceed to establish,
via a dimensional reduction procedure, an N=2 extension, allowing for the
identification of non-perturbative features, as we put forward Bogomol'nyi
equations and obtain vortex-like solutions saturating a topologically
non-trivial bound. Remarkably, the bosonic projection of the N=2 functional
space onto the saturated regime analysed herewith reveals to be free from extra
scalar degrees of freedom that would otherwise demand a phenomenological
interpretation. The investigation of Jackiw's model within an N=2 complex
superspace is also motivated by the assumption that an R-parity-like symmetry
could provide a route to incorporate the global phase-fermion number invariance
as an external-like symmetry of the theory, thus associating the electric
charge in graphene to the complex covariance (super-)space for the N=2-D=3
setup. We prove such a hypothesis to be realisable, as we build up the model
endowed with all the symmetries required to further extend Jackiw's chiral
gauge theory.


title:
Accuracy of Latent-Variable Estimation in Bayesian Semi-Supervised
  Learning

abstract:
  Hierarchical probabilistic models, such as Gaussian mixture models, are
widely used for unsupervised learning tasks. These models consist of observable
and latent variables, which represent the observable data and the underlying
data-generation process, respectively. Unsupervised learning tasks, such as
cluster analysis, are regarded as estimations of latent variables based on the
observable ones. The estimation of latent variables in semi-supervised
learning, where some labels are observed, will be more precise than that in
unsupervised, and one of the concerns is to clarify the effect of the labeled
data. However, there has not been sufficient theoretical analysis of the
accuracy of the estimation of latent variables. In a previous study, a
distribution-based error function was formulated, and its asymptotic form was
calculated for unsupervised learning with generative models. It has been shown
that, for the estimation of latent variables, the Bayes method is more accurate
than the maximum-likelihood method. The present paper reveals the asymptotic
forms of the error function in Bayesian semi-supervised learning for both
discriminative and generative models. The results show that the generative
model, which uses all of the given data, performs better when the model is well
specified.


title: A Predicted New Population of UV-faint Galaxies at z>4

abstract:
  We show that a bursty model of high redshift star formation explains several
puzzling observations of the high redshift galaxy population. We begin by
pointing out that the observed specific star formation rate requires a
duty-cycle of ~10%, which is much lower than found in many hydro-dynamical
simulations. This value follows directly from the fact that the observed star
formation rate in galaxies integrated over a Hubble time exceeds the observed
stellar mass by an order of magnitude. We use the large observed specific star
formation rate to calibrate the efficiency of feedback in a model for the high
redshift star formation rate which includes merger driven star formation
regulated by SNe feedback. This model reproduces the star formation rate
density function and the stellar mass function of galaxies at 4<z<7. A
prediction of the model is that the specific star formation rate does not
evolve very rapidly with either mass or redshift, in agreement with
observation. This is in contrast to results from hydrodynamical simulations
where the star formation closely follows the accretion rate, and so increases
strongly towards high redshift. The bursty star formation model naturally
explains the observation that there is not enough stellar mass at z~2-4 to
account for all of the star-formation observed, without invoking properties
like an evolving initial mass function of stars. The finding of a duty cycle
that is ~10% implies that there should be ten times the number of known
galaxies at fixed stellar mass that have not yet been detected through standard
UV selection at high redshift. We therefore predict the existence of a large
undetected population of UV-faint galaxies that accounts for most of the
stellar mass density at z~4-8.


title:
A Classification of Flows on AFD Factors with Faithful Connes--Takesaki
  Modules

abstract:
  We classify flows on AFD factors with faithful Connes-Takesaki modules. This
is a generalization of classification of trace-scaling flows on the AFD
$\mathrm{II}_\infty$ factor, which is equivalent to the uniqueness of the AFD
$\mathrm{III}_1$ factor. In order to do this, we show that a flow on an AFD
factor with faithful Connes-Takesaki module has the Rohlin property, which
gives a partial answer to a characterization problem of the Rohlin property
posed by Masuda-Tomatsu. It is also possible to think of this result as an
$\mathbf{R}$-version of Izumi's result about compact group actions on type III
factors with faithful Connes-Takesaki modules.


title:
Majorana Fermions on Zigzag Edge of Monolayer Transition Metal
  Dichalcogenides

abstract:
  Majorana fermions, quantum particles with non-Abelian exchange statistics,
are not only of fundamental importance, but also building blocks for
fault-tolerant quantum computation. Although certain experimental breakthroughs
for observing Majorana fermions have been made recently, their conclusive
dection is still challenging due to the lack of proper material properties of
the underlined experimental systems. Here we propose a new platform for
Majorana fermions based on edge states of certain non-topological
two-dimensional semiconductors with strong spin-orbit coupling, such as
monolayer group-VI transition metal dichalcogenides (TMD). Using
first-principles calculations and tight-binding modeling, we show that zigzag
edges of monolayer TMD can host well isolated single edge band with strong
spin-orbit coupling energy. Combining with proximity induced s-wave
superconductivity and in-plane magnetic fields, the zigzag edge supports robust
topological Majorana bound states at the edge ends, although the
two-dimensional bulk itself is non-topological. Our findings points to a
controllable and integrable platform for searching and manipulating Majorana
fermions.


title:
An injectivity theorem with multiplier ideal sheaves of singular metrics
  with transcendental singularities

abstract:
  The purpose of this paper is to establish an injectivity theorem generalized
to pseudo-effective line bundles with transcendental (non-algebraic) singular
hermitian metrics and multiplier ideal sheaves. As an application, we obtain a
Nadel type vanishing theorem. For the proof, we study the asymptotic behavior
of the harmonic forms with respect to a family of regularized metrics, and give
a method to obtain L2-estimates of solutions of the dbar-equation by using the
de Rham-Weil isomorphism between the dbar-cohomology and the check{C}ech
cohomology.


title: Componentwise regularity (I)

abstract:
  We define the notion of componentwise regularity and study some of its basic
properties. We prove an analogue, when working with weight orders, of
Buchberger's criterion to compute Gr\"obner bases; the proof of our criterion
relies on a strengthening of a lifting lemma of Buchsbaum and Eisenbud. This
criterion helps us to show a stronger version of Green's crystallization
theorem in a quite general setting, according to the componentwise regularity
of the initial object. Finally we show a necessary condition, given a submodule
$M$ of a free one over the polynomial ring and a weight such that $in(M)$ is
componentwise linear, for the existence of an $i$ such that
$\beta_i(M)=\beta_i(in(M))$.


title:
Free Probability for Pairs of Faces II: 2-Variables Bi-free
  $R$-Transform and Systems with Rank $\le 1$ Commutation

abstract:
  We compute the generating series for the simplest class of bi-free cumulants,
beyond free cumulants, the two-bands bi-free cumulants of a pair of a left and
a right variable. We also consider two-faced systems with a commutation
condition implying that two-bands moments, that is expectation values of the
product of a monomial of left and a monomial of right variables determine the
other moments. Examples include hyponormal operators, dual systems in free
entropy theory and bi-partite systems.


title:
Performance gain of displacement receiver with optimized prior
  probability

abstract:
  We numerically study the performance of the displacement based quantum
receiver for the discrimination of weak 3- and 4-phase-shift keyed (PSK)
coherent state signals. We show that due to the nontrivial asymmetry of the
receiver structure, optimization of the prior probability increases the mutual
information and achieves sub-shot-noise limit discrimination. Moreover, we
estimate the cutoff rate for a 4-PSK signal and confirm that the prior
probability optimization shortens the code length for a given decoding error
criterion. Such consideration for the asymmetric channel matrix is essential in
a study of the compassable quantum receiver.


title: Large Deviations of Correlation Functions in Random Magnets

abstract:
  We present a large deviations theory of the spin-spin correlation functions
in the Random Field Ising Model on the Bethe lattice, both at finite and zero
temperature. Rare events of atypically correlated variables are particularly
important at the critical point: the phase transition is driven by few pairs of
strongly correlated spins, while the majority remains basically uncorrelated.
At the zero temperature critical point the number of spin pairs correlated over
a distance L is shown to be no longer exponential, but only linear in the spins
separation.


title:
Using the Dipolar and Quadrupolar Moments to Improve Solar-Cycle
  Predictions Based on the Polar Magnetic Fields

abstract:
  The solar cycle and its associated magnetic activity are the main drivers
behind changes in the interplanetary environment and Earth's upper atmosphere
(commonly referred to as space weather and climate). In recent years there has
been an effort to develop accurate solar cycle predictions, leading to nearly a
hundred widely spread predictions for the amplitude of solar cycle 24. Here we
show that cycle predictions can be made more accurate if performed separately
for each hemisphere, taking advantage of information about both the dipolar and
quadrupolar moments of the solar magnetic field during minimum.


title:
Universal behaviour of a wave chaos based electromagnetic reverberation
  chamber

abstract:
  In this article, we present a numerical investigation of three-dimensional
electromagnetic Sinai-like cavities. We computed around 600 eigenmodes for two
different geometries: a parallelepipedic cavity with one half- sphere on one
wall and a parallelepipedic cavity with one half-sphere and two spherical caps
on three adjacent walls. We show that the statistical requirements of a well
operating reverberation chamber are better satisfied in the more complex
geometry without a mechanical mode-stirrer/tuner. This is to the fact that our
proposed cavities exhibit spatial and spectral statistical behaviours very
close to those predicted by random matrix theory. More specifically, we show
that in the range of frequency corresponding to the first few hundred modes,
the suppression of non-generic modes (regarding their spatial statistics) can
be achieved by reducing drastically the amount of parallel walls. Finally, we
compare the influence of losses on the statistical complex response of the
field inside a parallelepipedic and a chaotic cavity. We demonstrate that, in a
chaotic cavity without any stirring process, the low frequency limit of a well
operating reverberation chamber can be significantly reduced under the usual
values obtained in mode-stirred reverberation chambers.


title:
Accurate expansions of internal energy and specific heat of critical
  two-dimensional Ising model with free boundaries

abstract:
  The bond-propagation (BP) algorithm for the specific heat of the two
dimensional Ising model is developed and that for the internal energy is
completed. Using these algorithms, we study the critical internal energy and
specific heat of the model on the square lattice and triangular lattice with
free boundaries. Comparing with previous works [X.-T. Wu {\it et al} Phys. Rev.
E {\bf 86}, 041149 (2012) and Phys. Rev. E {\bf 87}, 022124 (2013)], we reach
much higher accuracy ($10^{-26}$) of the internal energy and specific heat,
compared to the accuracy $10^{-11}$ of the internal energy and $10^{-9}$ of the
specific heat reached in the previous works. This leads to much more accurate
estimations of the edge and corner terms. The exact values of some edge and
corner terms are therefore conjectured. The accurate forms of finite-size
scaling for the internal energy and specific heat are determined for the
rectangle-shaped square lattice with various aspect ratios and various shaped
triangular lattice. For the rectangle-shaped square and triangular lattices and
the triangle-shaped triangular lattice, there is no logarithmic correction
terms of order higher than 1/S, with S the area of the system. For the
triangular lattice in rhombus, trapezoid and hexagonal shapes, there exist
logarithmic correction terms of order higher than 1/S for the internal energy,
and logarithmic correction terms of all orders for the specific heat.


title:
Difference in the spatial distribution between H_2O and CO_2 ices in M82
  found with AKARI

abstract:
  With AKARI, we obtain the spatially-resolved near-infrared (2.5 - 5.0 um)
spectra for the nearby starburst galaxy M82. These spectra clearly show the
absorption features due to interstellar ices. Based on the spectra, we created
the column density maps of H_2O and CO_2 ices. As a result, we find that the
spatial distribution of H_2O ice is significantly different from that of CO_2
ice; H_2O ice is widely distributed, while CO_2 ice is concentrated near the
galactic center. Our result for the first time reveals variations in CO_2/H_2O
ice abundance ratio on a galactic scale, suggesting that the ice-forming
interstellar environment changes within a galaxy. We discuss the cause of the
spatial variations in the ice abundance ratio, utilizing spectral information
on the hydrogen recombination Br{\alpha} and Br{\beta} lines and the polycyclic
aromatic hydrocarbon 3.3 um emission appearing in the AKARI near-infrared
spectra.


title:
Social Judgment Theory Based Model On Opinion Formation, Polarization
  And Evolution

abstract:
  The dynamical origin of opinion polarization in the real world is an
interesting topic physical scientists may help to understand. To properly model
the dynamics, the theory must be fully compatible with findings by social
psychologists on microscopic opinion change. Here we introduce a generic model
of opinion formation with homogeneous agents based on the well-known social
judgment theory in social psychology by extending a similar model proposed by
Jager and Amblard. The agents' opinions will eventually cluster around extreme
and/or moderate opinions forming three phases in a two-dimensional parameter
space that describes the microscopic opinion response of the agents. The
dynamics of this model can be qualitatively understood by mean-field analysis.
More importantly, first-order phase transition in opinion distribution is
observed by evolving the system under a slow change in the system parameters,
showing that punctuated equilibria in public opinion can occur even in a fully
connected social network.


title: The K\"ahler rank of compact complex manifolds

abstract:
  The K\"ahler rank was introduced by Harvey and Lawson in their 1983 paper as
a measure of the {\it k\"ahlerianity} of a compact complex surface. In this
work we generalize this notion to the case of compact complex manifolds and we
prove several results related to this notion. We show that on class $VII$
surfaces, there is a correspondence between the closed positive forms on a
surface and those on a blow-up in a point. We also show that a manifold of
maximal K\"ahler rank which satisfies an additional condition is in fact
K\"ahler.


title:
QCD Corrections of All Structure Functions in Transverse Momentum
  Dependent Factorization for Drell-Yan Processes

abstract:
  We study the one-loop correction in Transverse-Momentum-Dependent(TMD)
factorization for Drell-Yan processes at small transverse momentum of the
lepton pair. We adopt the so-called subtractive approach, in which one can
systematically construct contributions for subtracting long-distance effects
represented by diagrams. The perturbative parts are obtained after the
subtraction. We find that the perturbative coefficients of all structure
functions in TMD factorization at leading twist are the same. The perturbative
parts can also be studied with scattering of partons instead of hadrons. In
this way, the factorization of many structure functions can only be examined by
studying the scattering of multi-parton states, where there are many diagrams.
These diagrams have no similarities to those treated in the subtractive
approach. As an example, we use existing results of one structure function
responsible for Single-Spin-Asymmetry, to show that these diagrams in the
scattering of multi-parton states are equivalent to those treated in the
subtractive approach after using Ward identity.


title:
An adaptive truncation method for inference in Bayesian nonparametric
  models

abstract:
  Many exact Markov chain Monte Carlo algorithms have been developed for
posterior inference in Bayesian nonparametric models which involve
infinite-dimensional priors. However, these methods are not generic and special
methodology must be developed for different classes of prior or different
models. Alternatively, the infinite-dimensional prior can be truncated and
standard Markov chain Monte Carlo methods used for inference. However, the
error in approximating the infinite-dimensional posterior can be hard to
control for many models. This paper describes an adaptive truncation method
which allows the level of the truncation to be decided by the algorithm and so
can avoid large errors in approximating the posterior. A sequence of truncated
priors is constructed which are sampled using Markov chain Monte Carlo methods
embedded in a sequential Monte Carlo algorithm. Implementational details for
infinite mixture models with stick-breaking priors and normalized random
measures with independent increments priors are discussed. The methodology is
illustrated on infinite mixture models, a semiparametric linear mixed model and
a nonparametric time series model.


title: A remark on the space of 7-gons with a fixed total length in $\R^3$

abstract:
  Based on the model of the space $Pol_3(n)$ of polygons in $R^3$ with limited
number of vertex, which was proposed by Jean-Claude Hausmann and Allen Knutson,
and developed by several authors: Jason Cantarella, Alexander Y. Grosberg,
Robert Kusner, and Clayton Shonkwiler, we prove that there exists an isometric
isotopy of $Pol_3(n)$, $n=7$, into itself, which transforms an arbitrary
polygon to its mirror copy, and, additionally, preserves lengths of projections
of polygons into the two coordinate planes, and keeps projection of polygons
onto the line. The proof is based on elementary arguments with Cayley numbers.
A possible generalization of the statement for greater $n$ is related with a
theorem by I.James on strong Kervaire invariants in stable homotopy of spheres.


title: The Alexander polynomial as quantum invariant of links

abstract:
  In these notes we collect some results about finite dimensional
representations of $U_q(\mathfrak{gl}(1|1))$ and related invariants of framed
tangles which are well-known to experts but difficult to find in the
literature. In particular, we give an explicit description of the ribbon
structure on the category of finite dimensional
$U_q(\mathfrak{gl}(1|1))$-representation and we use it to construct the
corresponding quantum invariant of framed tangles. We explain in detail why
this invariant vanishes on closed links and how one can modify the construction
to get a nonzero invariant of framed closed links. Finally we show how to
obtain the Alexander polynomial by considering the vector representation of
$U_q(\mathfrak{gl}(1|1))$.


title: A remark on the Hopf invariant for spherical 4-braids

abstract:
  An approach by J.Wu describes homotopy groups $\pi_{n}(S^2)$ of the standard
2-sphere as isotopy classes of spherical $n+1$--strand Brunnian braids is
investigated in the case $n=3$ for applications.


title: A Scaling Theory for ac Magnetic Response in Kagome Ice

abstract:
  A theory for frequency-dependent magnetic susceptibility \chi(\omega) is
developed for thermally activated magnetic monopoles in kagome ice. By mapping
this system to a two-dimensional (2D) Coulomb gas and then to a sine-Gordon
model, we have shown that the susceptibility has a scaling form
\chi(\omega)/\chi(0)={\cal F}(\omega/\omega_1), where the characteristic
\omega_1 is related to a charge correlation length between diffusively moving
monopoles, and to the sine-Gordon principal breather. The dynamical scaling is
universal among superfluid and superconducting films, and 2D XY magnets above
Kosterlitz-Thouless transitions.


title: Optical and magnetic properties of ZnCoO layers

abstract:
  Optical and magneto-optical properties of ZnCoO films grown at low
temperature by Atomic Layer Deposition are discussed. Strong wide band
absorption, with onset at about 2.4 eV, is observed in ZnCoO in addition to
Co-related intra-shell transitions. This absorption band is related to Co 2+ to
3+ photo-ionization transition. A strong photoluminescence (PL) quenching is
observed, which we relate to Co recharging in ZnO lattice. Mechanisms of PL
quenching are discussed.


title: Some Electronic Properties of Metals through q-Deformed Algebras

abstract:
  We study the thermodynamics of metals by applying q-deformed algebras. We
shall mainly focus our attention on q-deformed Sommerfeld parameter as a
function of q-deformed electronic specific heat. The results revealed that
q-deformation acts as a factor of disorder or impurity, modifying the
characteristics of a crystalline structure and thereby controlling the number
of electrons per unit volume.


title: Signatures Of Scalar Photon Interaction In Astrophysical Situations

abstract:
  Dimension-5 photon ($\gamma$) scalar ($\phi$) interaction terms usually
appear in the Lagrangian of bosonic sector of unified theories of
electromagnetism and gravity. This interaction makes the medium dichoric and
induces optical activity. We have modelled the propagation of photons with this
interaction in the environment of cold a magnetized compact star (White Dwarf
(WD) or Neutron Star (NS)), assuming synchro-curvature process as the dominant
mechanism of emission. We have tried to outline the polarimetric implications
of photon-scalar coupling on the produced spectrum of these emissions in the
stellar atmosphere. Further more assuming the 'emission-energy vs
emission-altitude' relation, that is believed to hold in such (i.e. cold
magnetized WD or NS) environments, we have tried to point out the possible
modifications to the radiation spectrum when the same is incorporated along
with dim-5 photon scalar mixing operator.


title:
NIR and optical observations of the failed outbursts of black hole
  binary XTE J1550-564

abstract:
  A number of low mass X-ray binaries (LMXBs) undergo "failed outbursts" in
which, instead of evolving through the canonical states, they remain in a hard
state throughout the outburst. While the sources of X-ray and radio emission in
the hard state are relatively well understood, the origin of the near infrared
(NIR) and optical emission is more complex though it likely stems from an
amalgam of different emission processes, occurring as it does, at the
intersecting wavelengths of those processes. We aim to identify the NIR/optical
emission region(s) during a number of failed outbursts of one such low mass
X-ray binary and black hole candidate, XTE J1550-564, in order to confirm or
refute their classification as hard-state, failed outbursts. We present unique
NIR/optical images and spectra, obtained with the ESO-New Technology Telescope,
during the failed outbursts of 2001 and 2000. We compare the NIR/optical
photometric, timing, and spectral properties with those expected for the
different emission mechanisms in the various LMXB states. The NIR/optical data
are consistent with having come from reprocessing of X-rays in the accretion
disk, with no evidence of direct thermal emission from the disk itself.
However, the observed variability in high-cadence NIR light curves suggest that
the radio jet extends and contributes to the NIR wavelengths. We find that
these failed outbursts did not transition to an intermediate state but remained
in a true, hard state where there was no sign of jet quenching or deviation
from the observed hard state correlations.


title:
Evidence for Infalling Gas of Low Angular Momentum towards the L1551 NE
  Keplerian Circumbinary Disk

abstract:
  We report follow-up observations of the Class I binary protostellar system
L1551 NE in the C18O (3--2) line with the SMA in its compact and subcompact
configurations. Our previous observations at a higher angular resolution in the
extended configuration revealed a circumbinary disk exhibiting Keplerian
motion. The combined data having more extensive spatial coverage (~140 - 2000
AU) verify the presence of a Keplerian circumbinary disk, and reveals for the
first time a distinct low-velocity (~< +-0.5 km s-1 from the systemic velocity)
component that displays a velocity gradient along the minor axis of the
circumbinary disk. Our simple model that reproduces the main features seen in
the Position-Velocity diagrams comprises a circumbinary disk exhibiting
Keplerian motion out to a radius of ~300 AU, beyond which the gas exhibits pure
infall at a constant velocity of ~0.6 km s-1. The latter is significantly
smaller than the expected free-fall velocity of ~2.2 km s-1 onto the L1551 NE
protostellar mass of ~0.8 Msun at ~300 AU, suggesting that the infalling gas is
decelerated as it moves into regions of high gas pressure in the circumbinary
disk. The discontinuity in angular momenta between the outer infalling gas and
inner Keplerian circumbinary disk implies an abrupt transition in the
effectiveness at which magnetic braking is able to transfer angular momentum
outwards, a result perhaps of the different plasma beta and ionization
fractions between the outer and inner regions of the circumbinary disk.


title:
Proceedings of the 23rd Workshop on Logic-based methods in Programming
  Environments (WLPE 2013)

abstract:
  This volume contains the papers presented at the 23rd Workshop on Logic-based
Methods in Programming Environments (WLPE 2013), which was held in Istanbul,
Turkey, on August 24 & 25 2013 as a satellite event of the 29th International
Conference on Logic Programming, (ICLP 2013).


title:
Two stage order-disorder transformation in simple monatomic
  supercritical fluid: superstable tetrahedral local order

abstract:
  The local order units of dense simple liquid are typically three dimensional
(close packed) clusters: hcp, fcc and icosahedrons. We show that the fluid
demonstrates the superstable tetrahedral local order up to temperatures several
orders of magnitude higher than the melting temperature and down to critical
density. While the solid-like local order (hcp, fcc) disappears in the fluid at
much lower temperatures and far above critical density. We conclude that the
supercritical fluid shows the temperature (density) driven two stage "melting"
of the three dimensional local order. We also find that the structure
relaxation times in the supercritical fluid are much larger than ones estimated
for weakly interactive gas even far above the melting line.

categories: cond-mat.dis-nn cond-mat.mtrl-sci cond-mat.soft physics.chem-ph


title: ZnO, ZnMnO and ZnCoO films grown by atomic layer deposition

abstract:
  Despite many efforts the origin of a ferromagnetic (FM) response in ZnMnO and
ZnCoO is still not clear. Magnetic investigations of our samples, not discussed
here, show that the room temperature FM response is observed only in alloys
with a non-uniform Mn or Co distribution. Thus, the control of their
distribution is crucial for explanation of contradicted magnetic properties of
ZnCoO and ZnMnO reported till now. In the present review we discuss advantages
of the Atomic Layer Deposition (ALD) growth method, which enables us to control
uniformity of ZnMnO and ZnCoO alloys. Properties of ZnO, ZnMnO and ZnCoO films
grown by the ALD are discussed.


title:
RBioCloud: A Light-weight Framework for Bioconductor and R-based Jobs on
  the Cloud

abstract:
  Large-scale ad hoc analytics of genomic data is popular using the
R-programming language supported by 671 software packages provided by
Bioconductor. More recently, analytical jobs are benefitting from on-demand
computing and storage, their scalability and their low maintenance cost, all of
which are offered by the cloud. While Biologists and Bioinformaticists can take
an analytical job and execute it on their personal workstations, it remains
challenging to seamlessly execute the job on the cloud infrastructure without
extensive knowledge of the cloud dashboard. How analytical jobs can not only
with minimum effort be executed on the cloud, but also how both the resources
and data required by the job can be managed is explored in this paper. An
open-source light-weight framework for executing R-scripts using Bioconductor
packages, referred to as `RBioCloud', is designed and developed. RBioCloud
offers a set of simple command-line tools for managing the cloud resources, the
data and the execution of the job. Three biological test cases validate the
feasibility of RBioCloud. The framework is publicly available from
http://www.rbiocloud.com.


title:
The <lnA> study in the primary energy range 10^{16} - 10^{17} eV with
  the Muon Tracking Detector in the KASCADE-Grande experiment

abstract:
  The KASCADE-Grande Muon Tracking Detector enables with high accuracy the
measurement of directions of EAS muons with energy above 0.8 GeV and up to 700
m distance from the shower centre. Reconstructed muon tracks are used to
investigate muon pseudorapidity (eta) distributions. These distributions are
nearly identical to the pseudorapidity distributions of their parent mesons
produced in hadronic interactions. Comparison of the eta distributions from
measured and simulated showers can be used to test the quality of the high
energy hadronic interaction models. In this context a comparison of the
QGSJet-II-2 and QGSJet-II-4 model will be shown. The pseudorapidity
distributions reflect the longitudinal development of EAS and, as such, are
sensitive to the mass of the cosmic rays primary particles. With various
parameters of the eta distribution, obtained from the MTD data, it is possible
to calculate the mean logarithmic mass of CRs. The results of the <lnA>
analysis in the primary energy range 10^{16} eV - 10^{17} eV with the 1st
quartile (Q1) of eta distribution will be presented.


title: Longtime behavior of coupled wave equations for semiconductor lasers

abstract:
  Coupled wave equations are popular tool for investigating longitudinal
dynamical effects in semiconductor lasers, for example, sensitivity to delayed
optical feedback. We study a model that consists of a hyperbolic linear system
of partial differential equations with one spatial dimension, which is
nonlinearly coupled with a slow subsystem of ordinary differential equations.
We first prove the basic statements about the existence of solutions of the
initial-boundary-value problem and their smooth dependence on initial values
and parameters. Hence, the model constitutes a smooth infinite-dimensional
dynamical system. Then we exploit the particular slow-fast structure of the
system to construct a low-dimensional attracting invariant manifold for certain
parameter constellations. The flow on this invariant manifold is described by a
system of ordinary differential equations that is accessible to classical
bifurcation theory and numerical tools such as AUTO.


title:
Numerical Simulation of a possible origin of the positive radial
  metallicity gradient of the thick disk

abstract:
  We analyze the radial and vertical metallicity and [alpha/Fe] gradients of
the disk stars of a disk galaxy simulated in a fully cosmological setting with
the chemodynamical galaxy evolution code, GCD+. We study how the radial
abundance gradients vary as a function of height above the plane and find that
the metallicity ([alpha/Fe]) gradient becomes more positive (negative) with
increasing height, changing sign around 1.5 kpc above the plane. At the largest
vertical height (2 < |z| < 3 kpc), our simulated galaxy shows a positive radial
metallicity gradient. We find that the positive metallicity gradient is caused
by the age-metallicity and age-velocity dispersion relation, where the younger
stars have higher metallicity and lower velocity dispersion. Due to the
age-velocity dispersion relation, a greater fraction of younger stars reach |z|
> 2 kpc at the outer region, because of the lower gravitational restoring force
of the disk, i.e. flaring. As a result, the fraction of younger stars with
higher metallicity due to the age-metallicity relation becomes higher at the
outer radii, which makes the median metallicity higher at the outer radii.
Combining this result with the recently observed age-metallicity and
age-velocity dispersion relation for the Milky Way thick disk stars suggested
by Haywood et al. (2013), we argue that the observed (small) positive radial
metallicity gradient at large heights of the Milky Way disk stars can be
explained by the flaring of the younger thick and/or thin disk stars.