title:
Dwarf Novae in the OGLE Data. II. Forty New Dwarf Novae in the OGLE-III
  Galactic Disk Fields

abstract:
  We report the discovery of forty erupting cataclysmic variable stars in the
OGLE-III Galactic disk fields: seventeen objects of U Gem type, four of Z Cam
type, and nineteen stars showing outbursts and superoutbursts typical for SU
UMa type dwarf novae. In the case of five stars we were able to estimate their
supercycle lengths. The obtained lengths are in the range 20-90 d, generally
between the typical SU UMa type variables and a few objects classified as the
ER UMa type variables. Since there is no significant difference between the two
types but a higher mass-transfer rate resulting in more frequent outbursts and
superoutbursts in the ER UMa type stars, we propose to discard this type as a
separate class of variables. We note that in one of the SU UMa type stars,
OGLE-GD-DN-039, we found a negative supercycle period change, in contrast to
other active systems of this type. Two of the new OGLE objects showed
long-duration WZ Sge-like superoutbursts followed by a sequence of echo
outbursts. All stars reported in this paper are part of the OGLE-III Catalog of
Variable Stars.


title:
A Critical Examination on L/E Analysis in the Underground Detectors with
  a Computer Numerical Experiment Part 1

abstract:
  In the present paper we consider neutrino events due to quasi-elastic
scattering (QEL) as the most reliable events among various candidate events to
be analyzed, and have carried out the first step of an L/E analysis which aims
to confirm the survival probability with a Numerical Computer Experiment. The
most important factor in the survival probability is Lnu and Enu, but this
cannot be measured for such neutral particles. Instead, Lmu and Emu is utilized
in the L/E analysis, where Lnu, Lmu, Enu and Emu denote the flight path lengths
of the incident neutrinos, those of the emitted leptons, the energies of the
incident neutrinos and those of the emitted leptons, respectively. According to
our Computer Numerical Experiment, the relation of Lnu/Enu is nearly equal to
Lmu/Emu doesn't hold. In subsequent papers, we show the results on an L/E
analysis with the Computer Numerical Experiment based on our results obtained
in the present paper.


title: [O~{\small VI} from the SBs of the LMC

abstract:
  We have presented the observations of O {\small VI} absorption at 1032 \AA\
towards 22 sightlines in 10 superbubbles (SBs) of the Large Magellanic Cloud
(LMC) using the data obtained from the {\em Far Ultraviolet Spectroscopic
Explorer (FUSE)}. The estimated abundance of O {\small VI} in the SBs varies
from a minimum of (1.09 $\pm$0.22)$\times10^{14}$ atoms/cm$^{2}$ in SB N206 to
a maximum of (3.71$\pm$0.23)$\times10^{14}$ atoms/cm$^{2}$ in SB N70. We find
about a 46% excess in the abundance of O {\small VI} in the SBs compared to the
non-SB lines of sight. Even inside a SB, O {\small VI} column density (N(O
{\small VI})) varies by about a factor of 2 to 2.5. These data are useful in
understanding the nature of the hot gas in SBs.


title:
Systematic study of elliptic flow parameter in the relativistic nuclear
  collisions at RHIC and LHC energies

abstract:
  We employed the new issue of a parton and hadron cascade model PACIAE 2.1 to
systematically investigate the charged particle elliptic flow parameter $v_2$
in the relativistic nuclear collisions at RHIC and LHC energies. With randomly
sampling the transverse momentum $x$ and $y$ components of the particles
generated in string fragmentation on the circumference of an ellipse instead of
circle originally, the calculated charged particle $v_2(\eta)$ and $v_2(p_T)$
fairly reproduce the corresponding experimental data in the Au+Au/Pb+Pb
collisions at $\sqrt{s_{NN}}$=0.2/2.76 TeV. In addition, the charged particle
$v_2(\eta)$ and $v_2(p_T)$ in the p+p collisions at $\sqrt s$=7 TeV as well as
in the p+Au/p+Pb collisions at $\sqrt{s_{NN}}$=0.2/5.02 TeV are predicted.


title: Star edge coloring of some classes of graphs

abstract:
  \textit{A star edge coloring} of a graph is a proper edge coloring without
bichromatic paths and cycles of length four. In this paper we establish tight
upper bounds for trees and subcubic outerplanar graphs, and derive an upper
bound for outerplanar graphs.


title:
Impact of nuclear effects on the extraction of neutrino oscillation
  parameters

abstract:
  We study the possible impact of nuclear effects and final state interactions
on the determination of the oscillation parameters due to mis-reconstruction of
non-quasi-elastic events as quasi-elastic events at low energies. We analyze a
$\nu_\mu$ disappearance experiment using a water \v{C}erenkov detector. We find
that, if completely ignored in the fit, nuclear effects can induce a
significant bias in the determination of atmospheric oscillation parameters,
particularly for the atmospheric mixing angle. Even after inclusion of a near
detector a bias in the determination of the atmospheric mixing angle comparable
to the statistical error remains.


title: Science and Philosophy: A Love-Hate Relationship

abstract:
  In this paper I review the problematic relationship between science and
philosophy; in particular, I will address the question of whether science needs
philosophy, and I will offer some positive perspectives that should be helpful
in developing a synergetic relationship between the two. I will review three
lines of reasoning often employed in arguing that philosophy is useless for
science: a) philosophy's death diagnosis ('philosophy is dead'); b) the
historic-agnostic argument/challenge "show me examples where philosophy has
been useful for science, for I don't know of any"; c) the division of property
argument (or: philosophy and science have different subject matters, therefore
philosophy is useless for science).
  These arguments will be countered with three contentions to the effect that
the natural sciences need philosophy. I will: a) point to the fallacy of
anti-philosophicalism (or: 'in order to deny the need for philosophy, one must
do philosophy') and examine the role of paradigms and presuppositions (or: why
science can't live without philosophy); b) point out why the historical
argument fails (in an example from quantum mechanics, alive and kicking); c)
briefly sketch some domains of intersection of science and philosophy and how
the two can have mutual synergy. I will conclude with some implications of this
synergetic relationship between science and philosophy for the liberal arts and
sciences.


title: Gas and Dust in the Magellanic Clouds

abstract:
  The far-ultraviolet (FUV) diffuse emission is predominantly due to scattering
of starlight from interstellar dust grains which shows a large regional
variation depending on the relative orientations of dust and stars. The
observations of the FUV (1000 -- 1150 \AA) diffuse radiation in the Magellanic
Clouds (MCs) using serendipitous observations made with the Far Ultraviolet
{\em Spectroscopic Explorer (FUSE)} are presented. The estimated contribution
of FUV diffuse radiation to the total integrated FUV emission in the MCs is
found to be typically 5% -- 20% in the Large Magellanic Cloud (LMC) and 34% --
44% in the Small Magellanic Cloud (SMC) at the {\em FUSE} bands ($\lambda$ =
905 -- 1187 \AA) and it increases substantially towards the longer wavelength
(e.g., 63% for the SMC at 1615 \AA). The less scattering of light in the FUV at
the shorter wavelength than at the longer wavelength indicates that much of the
stellar radiation at the shorter wavelength is going into heating the
interstellar dust.
  Five times ionized oxygen atom (O {\small VI}) is a tracer of hot gas (T
$\sim 3\times 10^{5}$ K) in the interstellar medium (ISM). A wide survey of O
{\small VI} column density measurements for the LMC is presented using the high
resolution {\em FUSE} spectra. The column density varies from a minimum of log
N(O {\small VI}) = 13.72 atoms cm$^{-2}$ to a maximum of log N(O {\small VI}) =
14.57 atoms cm$^{-2}$. A high abundance of O {\small VI} is observed in both
active (superbubbles) and inactive regions of the LMC.


title:
An investigation into the radial velocity variability of GJ 581 - On the
  significance of GJ 581g

abstract:
  We investigate the radial velocity variation of GJ 581 based on measurements
from the HARPS and Keck HIRES spectrographs. A Fourier pre-whitening procedure
is able to extract four planetary signals in the HARPS data and two from the
Keck data. Combining both data sets increases the significance of the four
planet signals found by HARPS. This indicates that the Keck data also supports
the presence of four planets. A periodogram analysis of the residual radial
velocity measurements after removal of the four planetary signals shows several
periodic signals that are significant when assessing the false alarm
probability via a bootstrap. However, it is demonstrated that these are not due
to planetary companions. This analysis is able to confirm the presence of four
planets around GJ 581, but not the presence of GJ 581g.


title: Aspects of the derivative coupling model in four dimensions

abstract:
  A concise discussion of a 3+1-dimensional derivative coupling model, in which
a massive Dirac field couples to the four-gradient of a massless scalar field,
is given in order to elucidate the role of different concepts in quantum field
theory like the regularization of quantum fields as operator valued
distributions, correlation distributions, locality, causality, and field
operator gauge transformations.


title:
A Method for Geometry Optimization in a Simple Model of Two-Dimensional
  Heat Transfer

abstract:
  This investigation is motivated by the problem of optimal design of cooling
elements in modern battery systems. We consider a simple model of
two-dimensional steady-state heat conduction described by elliptic partial
differential equations and involving a one-dimensional cooling element
represented by a contour on which interface boundary conditions are specified.
The problem consists in finding an optimal shape of the cooling element which
will ensure that the solution in a given region is close (in the least squares
sense) to some prescribed target distribution. We formulate this problem as
PDE-constrained optimization and the locally optimal contour shapes are found
using a gradient-based descent algorithm in which the Sobolev shape gradients
are obtained using methods of the shape-differential calculus. The main novelty
of this work is an accurate and efficient approach to the evaluation of the
shape gradients based on a boundary-integral formulation which exploits certain
analytical properties of the solution and does not require grids adapted to the
contour. This approach is thoroughly validated and optimization results
obtained in different test problems exhibit nontrivial shapes of the computed
optimal contours.


title:
Multiplicity dependence of two-particle azimuthal correlations in pp
  collisions at the LHC

abstract:
  We present the measurements of particle pair yields per trigger particle
obtained from di-hadron azimuthal correlations in pp collisions at $\sqrt{s} =
0.9$, $2.76$, and $7$ TeV recorded with the ALICE detector. The yields are
studied as a function of the charged particle multiplicity. Taken together with
the single particle yields the pair yields provide information about parton
fragmentation at low transverse momenta, as well as on the contribution of
multiple parton interactions to particle production. Data are compared to
calculations using the PYTHIA6, PYTHIA8, and PHOJET event generators.


title:
Improvements to the deformation method for counting points on smooth
  projective hypersurfaces

abstract:
  We present various improvements to the deformation method for computing the
zeta function of smooth projective hypersurfaces over finite fields using
$p$-adic cohomology. This includes new bounds for the $p$-adic and $t$-adic
precisions required to obtain provably correct results and gains in the
efficiency of the individual steps of the method. The algorithm that we thus
obtain has lower time and space complexities than existing methods. Moreover,
our implementation is more practical and can be applied more generally, which
we illustrate with examples of quintic curves and quartic surfaces.


title:
Algorithms for Producing Linear Dilution Gradient with Digital
  Microfluidics

abstract:
  Digital microfluidic (DMF) biochips are now being extensively used to
automate several biochemical laboratory protocols such as clinical analysis,
point-of-care diagnostics, and polymerase chain reaction (PCR). In many
biological assays, e.g., in bacterial susceptibility tests, samples and
reagents are required in multiple concentration (or dilution) factors,
satisfying certain "gradient" patterns such as linear, exponential, or
parabolic. Dilution gradients are usually prepared with continuous-flow
microfluidic devices; however, they suffer from inflexibility,
non-programmability, and from large requirement of costly stock solutions. DMF
biochips, on the other hand, are shown to produce, more efficiently, a set of
random dilution factors. However, all existing algorithms fail to optimize the
cost or performance when a certain gradient pattern is required. In this work,
we present an algorithm to generate any arbitrary linear gradient, on-chip,
with minimum wastage, while satisfying a required accuracy in the concentration
factor. We present new theoretical results on the number of mix-split
operations and waste computation, and prove an upper bound on the storage
requirement. The corresponding layout design of the biochip is also proposed.
Simulation results on different linear gradients show a significant improvement
in sample cost over three earlier algorithms used for the generation of
multiple concentrations.


title:
The Complexity of Fully Proportional Representation for Single-Crossing
  Electorates

abstract:
  We study the complexity of winner determination in single-crossing elections
under two classic fully proportional representation
rules---Chamberlin--Courant's rule and Monroe's rule. Winner determination for
these rules is known to be NP-hard for unrestricted preferences. We show that
for single-crossing preferences this problem admits a polynomial-time algorithm
for Chamberlin--Courant's rule, but remains NP-hard for Monroe's rule. Our
algorithm for Chamberlin--Courant's rule can be modified to work for elections
with bounded single-crossing width. To circumvent the hardness result for
Monroe's rule, we consider single-crossing elections that satisfy an additional
constraint, namely, ones where each candidate is ranked first by at least one
voter (such elections are called narcissistic). For single-crossing
narcissistic elections, we provide an efficient algorithm for the egalitarian
version of Monroe's rule.


title:
Network robustness of multiplex networks with interlayer degree
  correlations

abstract:
  We study the robustness properties of multiplex networks consisting of
multiple layers of distinct types of links, focusing on the role of
correlations between degrees of a node in different layers. We use generating
function formalism to address various notions of the network robustness
relevant to multiplex networks such as the resilience of ordinary- and mutual
connectivity under random or targeted node removals as well as the
biconnectivity. We found that correlated coupling can affect the structural
robustness of multiplex networks in diverse fashion. For example, for
maximally-correlated duplex networks, all pairs of nodes in the giant component
are connected via at least two independent paths and network structure is
highly resilient to random failure. In contrast, anti-correlated duplex
networks are on one hand robust against targeted attack on high-degree nodes,
but on the other hand they can be vulnerable to random failure.


title: Cyclic Automorphisms groups of genus 10 non-hyperelliptic curves

abstract:
  In this paper, we list all cyclic automorphisms subgroups $H$ for which there
exists a smooth projective non-hyperelliptic sextic curve $C$ with $H\preceq
Aut(C)$. Furthermore, we attach to each group a defining equation of a plane
sextic curve having exactly this group as cyclic automorphisms subgroup. These
equations cover up to isomorphism all plane non-singular sextic curves having
some non-trivial automorphism.


title:
An Analysis of HCN Observations of The Galactic Centre's Circumnuclear
  Disk

abstract:
  The Circumnuclear Disk (CND) is a torus of dust and moleular gas rotating
about the galactic centre and extends from 1.6 to 7pc from the central massive
black hole SgrA*. Large Velocity Gradient modelling of selected transitions of
HCN rotational collisions with molecular hydrogen is used to infer Hydrogen
density and HCN opacities. The analysis concludes that the predicted hydrogen
number density of CND clumps is about 10^6 which is insufficiently dense to
withstand the tidal shear forces generated by SgrA* and the stellar group in
the cavity between the galactic centre and the CND.


title: Optical signatures of a fully dark exciton condensate

abstract:
  We propose optical means to reveal the presence of a dark exciton condensate
that does not yield any photoluminescence at all. We show that (i) the dark
exciton density can be obtained from the blueshift of the excitonic absorption
line induced by dark excitons; (ii) the polarization of the dark condensate can
be deduced from the blueshift dependence on probe photon polarization and also
from Faraday effect, linearly polarized dark excitons leaving unaffected the
polarization plane of an unabsorbed photon beam. These effects result from
carrier exchanges between dark and bright excitons.


title:
Solutions of elliptic equations with a level surface parallel to the
  boundary: stability of the radial configuration

abstract:
  Positive solutions of homogeneous Dirichlet boundary value problems or
initial-value problems for certain elliptic or parabolic equations must be
radially symmetric and monotone in the radial direction if just one of their
level surfaces is parallel to the boundary of the domain. Here, for the
elliptic case, we prove the stability counterpart of that result. In fact, we
show that if the solution is almost constant on a surface at a fixed distance
from the boundary, then the domain is almost radially symmetric, in the sense
that is contained in and contains two concentric balls $B_{r_e}$ and $B_{r_i}$,
with the difference $r_e-r_i$ (linearly) controlled by a suitable norm of the
deviation of the solution from a constant. The proof relies on and enhances
arguments developed in a paper by Aftalion, Busca and Reichel.


title:
The relation between magnetic and material arms in models for spiral
  galaxies

abstract:
  Context. Observations of polarized radio emission show that large-scale
(regular) magnetic fields in spiral galaxies are not axisymmetric, but
generally stronger in interarm regions. In some nearby galaxies such as NGC
6946 they are organized in narrow magnetic arms situated between the material
spiral arms. Aims. The phenomenon of magnetic arms and their relation to the
optical spiral arms (the material arms) call for an explanation in the
framework of galactic dynamo theory. Several possibilities have been suggested
but are not completely satisfactory; here we attempt a consistent
investigation. Methods. We use a 2D mean-field dynamo model in the no-z
approximation and add injections of small-scale magnetic field, taken to result
from supernova explosions, to represent the effects of dynamo action on smaller
scales. This injection of small scale field is situated along the spiral arms,
where star-formation mostly occurs. Results. A straightforward explanation of
magnetic arms as a result of modulation of the dynamo mechanism by material
arms struggles to produce pronounced magnetic arms, at least with realistic
parameters, without introducing new effects such as a time lag between Coriolis
force and {\alpha}-effect. In contrast, by taking into account explicitly the
small-scale magnetic field that is injected into the arms by the action of the
star forming regions that are concentrated there, we can obtain dynamo models
with magnetic structures of various forms that can be compared with magnetic
arms. (abbrev). Conclusions. We conclude that magnetic arms can be considered
as coherent magnetic structures generated by large-scale dynamo action, and
associated with spatially modulated small-scale magnetic fluctuations, caused
by enhanced star formation rates within the material arms.


title:
Magnetotransport and thermal properties characterization of 55 K
  superconductor SmFeAsO0.85F0.15

abstract:
  Correlation between structural/microstructural and magneto-thermal transport
properties of FeAs-based SmFeAsO and SmFeAsO0.85F0.15 has been studied in
detail. The Rietveld analysis of room temperature powder X-ray diffraction
(XRD) data reveals that both the samples are single phase, with very small
amount of rare earth impurity in the F doped compound. Electron microscopic
investigations show that compounds have layered morphology and structure, with
the individual grains being surrounded by amorphous layers. The average grain
boundary thickness is ~5 nm. The F free material is found to be magnetic and
shows the appearance of Fe spin density wave (SDW) like order at T = 150 K. The
F doped compound (SmFeAsO0.85F0.15) shows the occurrence of superconductivity
at Tc(R=0, H=0)- 55 K, which decreases to 42 K at magnetic field (H) of 13 kOe.
The superconducting transition was also confirmed by DC magnetization and AC
susceptibility measurements. The intra-grain critical current density (Jc)
calculated using the Bean critical state model is found to be around 5.26 x
10^4 A/cm2 at 5 K in zero field (H=0). The dependence of thermally activated
flux flow energy (U/KB) on the applied magnetic field has been observed. AC
susceptibility measurements at different amplitude of applied AC drive field
confirm the granular nature of the superconducting compound. is confirmed. Both
Fe (SDW) at 150K for SmFeAsO and 55K superconductivity in case of
SmFeAsO0.85F0.15 sample has confirmed by Specific heat [Cp(T)] measurement too.
Further Sm orders anti-ferro-magnetically at 4.5K for non-superconducting and
at 3.5K for superconducting samples, also the entropy change is reduced
significantly for the later than the former. Summarily complete physical
property characterization for both non-superconducting SmFeAsO and 55K
superconductor SmFeAsO0.85F0.15 samples is provided and discussed in the
current article.


title:
Helmholtz equation in unbounded domains: some convergence results for a
  constrained optimization problem

abstract:
  We consider a constrained optimization problem arising from the study of the
Helmholtz equation in unbounded domains. The optimization problem provides an
approximation of the solution in a bounded computational domain. In this paper
we prove some estimates on the rate of convergence to the exact solution.


title:
Suppression of Coulomb exchange energy in quasi-two-dimensional hole
  systems

abstract:
  We have calculated the exchange-energy contribution to the total energy of
quasi-two-dimensional hole systems realized by a hard-wall quantum-well
confinement of valence-band states in typical semiconductors. The magnitude of
the exchange energy turns out to be suppressed from the value expected for
analogous conduction-band systems whenever the mixing between heavy-hole and
light-hole components is strong. Our results are obtained using a very general
formalism for calculating the exchange energy of many-particle systems where
single-particle states are spinors. We have applied this formalism to obtain
analytical results for spin-3/2 hole systems in limiting cases.


title: Minimal R_1, minimal regular and minimal presober topologies

abstract:
  By means of filters, minimal R_1 and minimal regular topologies are
characterized on suitable intervals consisting of non-trivial R_0 topologies.


title:
Calculation of the spiked harmonic oscillators through a generalized
  pseudospectral method

abstract:
  The generalized pseudospectral method is employed for the accurate
calculation of eigenvalues, densities and expectation values for the spiked
harmonic oscillators. This allows \emph{nonuniform} and \emph{optimal} spatial
discretization of the corresponding single-particle radial Schr\"odinger
equation satisfying the Dirichlet boundary conditions leading to the standard
diagonalization of the symmetric matrices. The present results for a large
range of potential parameters are in excellent agreement with those from the
other accurate methods available in the literature. The ground and excited
states (both low as well as high angular momentum states) are obtained with
equal ease and accuracy. Some new states including the higher excited states
are reported here for the first time. This offers a simple, accurate and
efficient method for the treatment of these and a wide variety of other
singular potentials of physical and chemical interest in quantum mechanics.


title: UPt$_3$ as a Topological Crystalline Superconductor

abstract:
  We investigate the topological aspect of the spin-triplet $f$-wave
superconductor UPt$_3$ through microscopic calculations of edge- and
vortex-bound states based on the quasiclassical Eilenberger and Bogoliubov-de
Gennes theories. It is shown that a gapless and linear dispersion exists at the
edge of the $ab$-plane. This forms a Majorana valley, protected by the mirror
chiral symmetry. We also demonstrate that, with increasing magnetic field,
vortex-bound quasiparticles undergo a topological phase transition from
topologically trivial states in the double-core vortex to zero-energy states in
the normal-core vortex. As long as the $d$-vector is locked into the
$ab$-plane, the mirror symmetry holds the Majorana property of the zero-energy
states, and thus UPt$_3$ preserves topological crystalline superconductivity
that is robust against the crystal field and spin-orbit interaction.


title: (G,\mu)- Quadratic Stochastic Operators

abstract:
  We consider a new subclass of quadratic stochastic (evolutionary) operators
on the simplex indexed by a finite Abelian group G with heredity law \mu. With
the help of the notion of s(\mu)-invariant subgroups, where s(\mu) denotes the
support of \mu in G, we prove that almost all (w.r.t.\ Lebesgue measure)
trajectories of such operators converge to a unique fixed point which is the
center of the simplex. We also identify and describe the periodic trajectories
of the operator and give conditions for regularity and periodicity.


title:
How to represent crystal structures for machine learning: towards fast
  prediction of electronic properties

abstract:
  High-throughput density-functional calculations of solids are extremely time
consuming. As an alternative, we here propose a machine learning approach for
the fast prediction of solid-state properties. To achieve this, LSDA
calculations are used as training set. We focus on predicting metallic vs.
insulating behavior, and on predicting the value of the density of electronic
states at the Fermi energy. We find that conventional representations of the
input data, such as the Coulomb matrix, are not suitable for the training of
learning machines in the case of periodic solids. We propose a novel crystal
structure representation for which learning and competitive prediction
accuracies become possible within an unrestricted class of spd systems. Due to
magnetic phenomena learning on d systems is found more difficult than in pure
sp systems.


title: Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects

abstract:
  We report magnetoresistance measurements on thin Pt bars grown on epitaxial
(001) and (111) CoFe2O4 (CFO) ferrimagnetic insulating films. The results can
be described in terms of the recently discovered spin Hall magnetoresistance
(SMR). The magnitude of the SMR depends on the interface preparation
conditions, being optimal when Pt/CFO samples are prepared in situ, in a single
process. The spin-mixing interface conductance, the key parameter governing SMR
and other relevant spin-dependent phenomena such as spin pumping or spin
Seebeck effect, is found to be different depending on the crystallographic
orientation of CFO, highlighting the role of the composition and density of
magnetic ions at the interface on spin mixing.


title:
The CoRoT star ID100866999: a hybrid gamma Doradus - delta Scuti star in
  an eclipsing binary system

abstract:
  The presence of g- and p-modes allows testing stellar models from the core to
the envelope. Moreover, binarity in an eclipsing system constrains the physical
parameters of the pulsating star. CoRot ID 100866999 is a relatively
large-amplitude hybrid gDor - dSct star with two clearly distinct frequency
domains. The large number of detected frequencies allows a detailed study of
the interaction between them. In addition, we can derive the fundamental
parameters of both components from the study of the eclipsing light curve.
After removing the eclipsing phases, we analyzed the data with the Period04
package up to S/N=4. The light curve was then prewhitened with these
oscillation frequencies to derive the fundamental parameters of the two
components. The eclipsing light curve analysis results in a (1.8+1.1)\,Mo
system, both components being main sequence stars. We detect 124 frequencies
related to luminosity variations of the primary. They are present in two
well-separated domains: 89 frequencies in the interval [0.30;3.64]/d and 35 in
the interval [14.57; 33.96]/d. There are 22 gDor frequencies separated by a
constant period interval Delta P = 0.03493 d. These frequencies correspond to a
series of g-modes of degree ell=1 with successive radial orders k. We identify
21 linear combinations between the first nine gDor frequencies. The dSct domain
is dominated by a large-amplitude frequency F=16.9803 /d. The eight first gDor
frequencies f_i are present with much lower amplitude in the delta Scuti domain
as F +/- f_i. These interactions between g- and p-modes confirm the phenomenon
we detected in another CoRoT star. The amplitude and the phase of the main
frequency F shows a double-wave modulation along the orbital phase, giving rise
to series of combination frequencies. Such combination frequencies are also
detected, with lower amplitude, for the first gDor modes.


title: Trace formula for fourth order operators on the circle

abstract:
  We determine the trace formula for the fourth order operator on the circle.
This formula is similar to the famous trace formula for the Hill operator
obtained by Dubrovin, Its-Matveev and McKean-van Moerbeke.


title:
A heterogeneous many-core platform for experiments on scalable custom
  interconnects and management of fault and critical events, applied to
  many-process applications: Vol. II, 2012 technical report

abstract:
  This is the second of a planned collection of four yearly volumes describing
the deployment of a heterogeneous many-core platform for experiments on
scalable custom interconnects and management of fault and critical events,
applied to many-process applications. This volume covers several topics, among
which: 1- a system for awareness of faults and critical events (named LO|FA|MO)
on experimental heterogeneous many-core hardware platforms; 2- the integration
and test of the experimental hardware heterogeneous many-core platform QUoNG,
based on the APEnet+ custom interconnect; 3- the design of a
Software-Programmable Distributed Network Processor architecture (DNP) using
ASIP technology; 4- the initial stages of design of a new DNP generation onto a
28nm FPGA. These developments were performed in the framework of the EURETILE
European Project under the Grant Agreement no. 247846.


title: Quality indicators for scientific journals based on experts opinion

abstract:
  This paper presents the results and further development of a survey sent to
11,799 Spanish faculty members and researchers from various fields of the
social sciences and the humanities, obtaining a total of 45.6% (5,368
responses) usable answers. Respondents were asked (a) to indicate the three
most important journals in their field and (b) to rate them on a 0-10 scale
according to their quality. The information obtained has been synthesized in
two indicators which reflect the perceived quality of journals. Once the values
were obtained, the journals were categorized according to each indicator and
the ordinal positions were compared. Different profiles of journals are
analyzed in connection with experts opinion, such as regional orientation, and
the consensus among researchers is studied. Finally, the possibilities of
extending the research and indicators to sets of international journals are
explored.


title: t3evol - Numerical Solution of Twist-three Evolution Equations

abstract:
  A program dedicated to the numerical solution of the evolution equations for
twist-three multiparton correlation functions is presented. The solutions are
obtained by direct integration on a discretized momentum fraction grid. Both
flavor nonsinglet and flavor singlet evolution (in both $C$-parity sectors) can
be addressed. Physical applications include single spin asymmetries and the
subleading twist contribution to the polarized structure function $g_2$. An
arbitrary input is accepted for the initial distributions.


title: Narrow Tetraquarks at Large N

abstract:
  Following a recent suggestion by Weinberg, we use the large-N expansion in
QCD to discuss the decay amplitudes of tetraquarks into ordinary mesons as well
as their mixing properties. We find that the flavor structure of the tetraquark
is a crucial ingredient to determine both this mixing as well as the decays.
Although in some cases tetraquarks should be expected to be as narrow as
ordinary mesons, they may get to be even narrower, depending on this flavor
structure.


title:
Enhanced diffusion of nonswimmers in a three-dimensional bath of motile
  bacteria

abstract:
  We show, using differential dynamic microscopy, that the diffusivity of
non-motile cells in a three-dimensional (3D) population of motile E. coli is
enhanced by an amount proportional to the active cell flux. While non-motile
mutants without flagella and mutants with paralysed flagella have quite
different thermal diffusivities and therefore hydrodynamic radii, their
diffusivities are enhanced to the same extent by swimmers in the regime of cell
densities explored here. Integrating the advective motion of non-swimmers
caused by swimmers with finite persistence-length trajectories predicts our
observations to within 2%, indicating that fluid entrainment is not relevant
for diffusion enhancement in 3D.


title:
Constructing Hierarchical Image-tags Bimodal Representations for Word
  Tags Alternative Choice

abstract:
  This paper describes our solution to the multi-modal learning challenge of
ICML. This solution comprises constructing three-level representations in three
consecutive stages and choosing correct tag words with a data-specific
strategy. Firstly, we use typical methods to obtain level-1 representations.
Each image is represented using MPEG-7 and gist descriptors with additional
features released by the contest organizers. And the corresponding word tags
are represented by bag-of-words model with a dictionary of 4000 words.
Secondly, we learn the level-2 representations using two stacked RBMs for each
modality. Thirdly, we propose a bimodal auto-encoder to learn the
similarities/dissimilarities between the pairwise image-tags as level-3
representations. Finally, during the test phase, based on one observation of
the dataset, we come up with a data-specific strategy to choose the correct tag
words leading to a leap of an improved overall performance. Our final average
accuracy on the private test set is 100%, which ranks the first place in this
challenge.


title: Topological Molino's theory

abstract:
  Molino's description of Riemannian foliations on compact manifolds is
generalized to the setting of compact equicontinuous foliated spaces, in the
case where the leaves are dense. In particular, a structural local group is
associated to such a foliated space. As an application, we obtain a partial
generalization of results by Carri\`ere and Breuillard-Gelander, relating the
structural local group to the growth of the leaves.


title: Evidence and plausibility in neighborhood structures

abstract:
  The intuitive notion of evidence has both semantic and syntactic features. In
this paper, we develop an {\em evidence logic} for epistemic agents faced with
possibly contradictory evidence from different sources. The logic is based on a
neighborhood semantics, where a neighborhood $N$ indicates that the agent has
reason to believe that the true state of the world lies in $N$. Further notions
of relative plausibility between worlds and beliefs based on the latter
ordering are then defined in terms of this evidence structure, yielding our
intended models for evidence-based beliefs. In addition, we also consider a
second more general flavor, where belief and plausibility are modeled using
additional primitive relations, and we prove a representation theorem showing
that each such general model is a $p$-morphic image of an intended one. This
semantics invites a number of natural special cases, depending on how uniform
we make the evidence sets, and how coherent their total structure. We give a
structural study of the resulting `uniform' and `flat' models. Our main result
are sound and complete axiomatizations for the logics of all four major model
classes with respect to the modal language of evidence, belief and safe belief.
We conclude with an outlook toward logics for the dynamics of changing
evidence, and the resulting language extensions and connections with logics of
plausibility change.


title:
Strong light-matter interaction in systems described by a modified Dirac
  equation

abstract:
  The bulk states of some materials, such as topological insulators, are
described by a modified Dirac equation. Such systems may have trivial and
non-trivial phases. In this paper, we show that in the non-trivial phase a
strong light-matter interaction exists in a two-dimensional system, which leads
to an optical conductivity at least one order of magnitude larger than that of
graphene.


title:
On non-abelian Brumer and Brumer-Stark conjectures for monomial
  CM-extensions

abstract:
  Let $K/k$ be a finite Galois CM-extension of number fields whose Galois group
$G$ is monomial and $S$ a finite set of places of $k$.\ Then the "Stickelberger
element" $\theta_{K/k,S}$ is defined.\ Concerning this element,\ Andreas Nickel
formulated the non-abelian Brumer and Brumer-Stark conjectures and their "weak"
versions.\ In this paper,\ when $G$ is a monomial group,\ we prove that the
weak non-abelian conjectures are reduced to the weak conjectures for abelian
subextensions.\ We write $D_{4p},\ Q_{2^{n+2}}$ and $A_4$ for the dihedral
group of order $4p$ for any odd prime $p$,\ the generalized quaternion group of
order $2^{n+2}$ for any natural number $n$ and the alternating group on 4
letters respectively.\ Suppose that $G$ is isomorphic to $D_{4p}$,\
$Q_{2^{n+2}}$ or $A_4 \times \mathbb{Z}/2\mathbb{Z}$.\ Then we prove the
$l$-parts of the weak non-abelian conjectures,\ where $l=2$ in the quaternion
case,\ and $l$ is an arbitrary prime which does not split in
$\mathbb{Q}(\zeta_p)$ in the dihedral case and in $\mathbb{Q}(\zeta_3)$ in the
alternating case.\ In particular,\ we do not exclude the 2-part of the
conjectures and do not assume that $S$ contains all finite places which ramify
in $K/k$ in contrast with Nickel's formulation.\


title: Unusual band renormalization in the simplest iron based superconductor

abstract:
  The electronic structure of the iron chalcogenide superconductor FeSe_{1-x}
was investigated by high- resolution angle-resolved photoemission spectroscopy
(ARPES). The results were compared to DFT calculations showing some significant
differences between the experimental electronic structure of FeSe_{1-x}, DFT
calculations and existing data on FeSe_{x}Te_{1-x}. The bands undergo a
pronounced orbital dependent renormalization, different from what was observed
for FeSe_{x}Te_{1-x} and any other pnictides.


title:
Probing for massive stochastic gravitational-wave background with a
  detector network

abstract:
  In a general metric theory of gravitation in four dimensions, six
polarizations of a gravitational wave are allowed: two scalar and two vector
modes, in addition to two tensor modes in general relativity. Such additional
polarization modes appear due to additional degrees of freedom in modified
gravity theories. Also graviton mass, which could be different in each
polarization, is another characteristic of modification of gravity. Thus,
testing the existence of additional polarization modes and graviton mass can be
a model-independent test of gravity theories. Here we extend the previous
framework of correlation analysis of a gravitational-wave background to the
massive case and show that a ground-based detector network can probe for
massive stochastic gravitational waves with its mass around ~10^{-14} eV. We
also show that more than three detectors can cleanly separate the mixture of
polarization modes in detector outputs and determine the graviton mass.


title:
Oxypnictide SmFeAs(O,F) superconductor: a candidate for high-field
  magnet applications

abstract:
  The recently discovered oxypnictide superconductor SmFeAs(O,F) is the most
attractive material among the Fe-based superconductors due to its highest
transition temperature of 56 K and potential for high-field performance. In
order to exploit this new material for superconducting applications, the
knowledge and understanding of its electro-magnetic properties are needed.
Recent success in fabricating epitaxial SmFeAs(O,F) thin films opens a great
opportunity to explore their transport properties. Here we report on a high
critical current density of over 10^5 A/cm^2 at 45 T and 4.2 K for both main
field orientations, feature favourable for high-field magnet applications.
Additionally, by investigating the pinning properties, we observed a
dimensional crossover between the superconducting coherence length and the FeAs
interlayer distance at 30-40 K, indicative of a possible intrinsic Josephson
junction in SmFeAs(O,F) at low temperatures that can be employed in electronics
applications such as a terahertz radiation source and a superconducting Qubit.


title:
Electronic transport in ferromagnetic barriers on the surface of a
  topological insulator with $\delta$ doping

abstract:
  We investigate electron transporting through a two-dimensional
ferromagnetic/normal/ferromagnetic tunnel junction on the surface of a
three-dimensional topological insulator with taking into $\delta$ doping
account. It is found that the conductance oscillates with the Fermi energy, the
position and the aptitude of the $\delta$ doping. Also the conductance depends
sensitively on the direction of the magnetization of the two ferromagnets,
which originate from the control of the spin flow due to spin-momentum locked.
It is found that the conductance is the maximum at the parallel configuration
while it is minimum at the antiparallel configuration and vice versa, which may
stem from the half wave loss due to the electron wave entering through the
antiparallel configuration. These characters are very helpful for making new
types of magnetoresistance devices due to the practical applications.


title: Nanophotonic Luminescent Solar Concentrators

abstract:
  We investigate the connection between photonic local density of states and
luminescent solar concentrator (LSC) performance in two manufacturable
nanocavity LSC structures, a bilayer slab and a slab photonic crystal.
Finite-difference time-domain electromagnetic simulations show that the
waveguided luminescence photon flux can be enhanced up to 30% for the photonic
crystal design over a conventional LSC operating in the ray optic limit
assuming the same number of excited lumophores. Further photonic engineering
could realize an increase of up to one order of magnitude in the flux of
waveguided luminescence.


title:
Correlation of Spectral Solar Irradiance with solar activity as measured
  by VIRGO

abstract:
  Context. The variability of Solar Spectral Irradiance over the rotational
period and its trend over the solar activity cycle are important for
understanding the Sun-Earth connection as well as for observational constraints
for solar models. Recently the SIM experiment on SORCE has published an
unexpected negative correlation with Total Solar Irradiance of the visible
spectral range. It is compensated by a strong and positive variability of the
near UV range. Aims. We aim to verify whether the anti-correlated
SIM/SORCE-trend in the visible can be confirmed by independent observations of
the VIRGO experiment on SOHO. The challenge of all space experiments measuring
solar irradiance are sensitivity changes of their sensors due to exposure to
intense UV radiation, which are difficult to assess in orbit. Methods. We
analyze a 10-year time series of VIRGO sun photometer data between 2002 and
2012. The variability of Spectral Solar Irradiance is correlated with the
variability of the Total Solar Irradiance, which is taken as a proxy for solar
activity. Results. Observational evidence indicates that after six years only
one single long-term process governs the degradation of the backup sun
photometer in VIRGO which is operated once in a month. This degradation can be
well approximated by a linear function over ten years. The analysis of the
residuals from the linear trend yield robust positive correlations of spectral
irradiance at 862, 500 and 402 nm with total irradiance. In the analysis of
annual averages of these data the positive correlations change into weak
negative correlations, but of little statistical significance, for the 862 nm
and 402 nm data. At 500 nm the annual spectral data are still positively
correlated with Total Solar Irradiance. The persisting positive correlation at
500 nm is in contradiction to the SIM/SORCE results.


title:
Influence of asperities on fluid and thermal flow in a fracture: a
  coupled Lattice Boltzmann study

abstract:
  The characteristics of the hydro-thermal flow which occurs when a cold fluid
is injected into a hot fractured bedrock depend on the morphology of the
fracture. We consider a sharp triangular asperity, invariant in one direction,
perturbing an otherwise flat fracture. We investigate its influence on the
macroscopic hydraulic transmissivity and heat transfer efficiency, at fixed low
Reynolds number. In this study, numerical simulations are done with a coupled
lattice Boltzmann method that solves both the complete Navier-Stokes and
advection-diffusion equations in three dimensions. The results are compared
with those obtained under lubrication approximations which rely on many
hypotheses and neglect the three-dimensional (3D) effects. The lubrication
results are obtained by analytically solving the Stokes equation and a
two-dimensional (integrated over the thickness) advection-diffusion equation.
We use a lattice Boltzmann method with a double distribution (for mass and
energy transport) on hypercubic and cubic lattices. Beyond some critical slope
for the boundaries, the velocity profile is observed to be far from a quadratic
profile in the vicinity of the sharp asperity: the fluid within the triangular
asperity is quasi-static. We find that taking account of both the 3D effects
and the cooling of the rock, are important for the thermal exchange. Neglecting
these effects with lubrication approximations results in overestimating the
heat exchange efficiency. The evolution of the temperature over time, towards
steady state, also shows complex behavior: some sites alternately reheat and
cool down several times, making it difficult to forecast the extracted heat.


title:
Dense Suspension Splat: Monolayer Spreading and Hole Formation After
  Impact

abstract:
  We use experiments and minimal numerical models to investigate the rapidly
expanding monolayer formed by the impact of a dense suspension drop against a
smooth solid surface. The expansion creates a lace-like pattern of particle
clusters separated by particle-free regions. Both the expansion and the
development of the spatial inhomogeneity are dominated by particle inertia,
therefore robust and insensitive to details of the surface wetting, capillarity
and viscous drag.


title:
Local times for functions with finite variation: two versions of
  Stieltjes change of variables formula

abstract:
  We introduce two natural notions for the occupation measure of a function $V$
with finite variation. The first yields a signed measure, and the second a
positive measure. By comparing two versions of the change-of-variables formula,
we show that both measures are absolutely continuous with respect to Lebesgue
measure. Occupation densities can be thought of as local times of $V$, and are
described by a Meyer-Tanaka like formula.


title: Further results on dissimilarity spaces for hyperspectral images RF-CBIR

abstract:
  Content-Based Image Retrieval (CBIR) systems are powerful search tools in
image databases that have been little applied to hyperspectral images.
Relevance feedback (RF) is an iterative process that uses machine learning
techniques and user's feedback to improve the CBIR systems performance. We
pursued to expand previous research in hyperspectral CBIR systems built on
dissimilarity functions defined either on spectral and spatial features
extracted by spectral unmixing techniques, or on dictionaries extracted by
dictionary-based compressors. These dissimilarity functions were not suitable
for direct application in common machine learning techniques. We propose to use
a RF general approach based on dissimilarity spaces which is more appropriate
for the application of machine learning algorithms to the hyperspectral
RF-CBIR. We validate the proposed RF method for hyperspectral CBIR systems over
a real hyperspectral dataset.


title: Nonlocal action for the super-Weyl anomalies: A new representation

abstract:
  Using the recently discovered N=1 supersymmetric extension of the conformal
fourth-order scalar operator (introduced originally by Fradkin and Tseytlin and
also known as the "Paneitz operator" or "Riegert operator"), we derive a new
representation for the nonlocal action generating the super-Weyl anomalies.


title:
State Counting for Excited Bands of the Fractional Quantum Hall Effect:
  Exclusion Rules for Bound Excitons

abstract:
  Exact diagonalization studies have revealed that the energy spectrum of
interacting electrons in the lowest Landau level splits, non-perturbatively,
into bands, which is responsible for the fascinating phenomenology of this
system. The theory of nearly free composite fermions has been shown to be valid
for the lowest band, and thus to capture the low temperature physics, but it
over-predicts the number of states for the excited bands. We explain the state
counting of higher bands in terms of composite fermions with an infinitely
strong short range interaction between an excited composite-fermion particle
and the hole it leaves behind. This interaction, the form of which we derive
from the microscopic composite fermion theory, eliminates configurations
containing certain tightly bound composite-fermion excitons. With this
modification, the composite-fermion theory reproduces,for all well-defined
excited bands seen in exact diagonalization studies, an exact counting for
$\nu>1/3$, and an almost exact counting for $\nu\leq 1/3$. The resulting
insight clarifies that the corrections to the nearly free composite fermion
theory are not thermodynamically significant at sufficiently low temperatures,
thus providing a microscopic explanation for why it has proved successful for
the analysis of the various properties of the composite-fermion Fermi sea.


title: Friction as Contrast Mechanism in Heterodyne Force Microscopy

abstract:
  The nondestructive imaging of subsurface structures on the nanometer scale
has been a long-standing desire in both science and industry. A few impressive
images were published so far that demonstrate the general feasibility by
combining ultrasound with an Atomic Force Microscope. From different excitation
schemes, Heterodyne Force Microscopy seems to be the most promising candidate
delivering the highest contrast and resolution. However, the physical contrast
mechanism is unknown, thereby preventing any quantitative analysis of samples.
Here we show that friction at material boundaries within the sample is
responsible for the contrast formation. This result is obtained by performing a
full quantitative analysis, in which we compare our experimentally observed
contrasts with simulations and calculations. Surprisingly, we can rule out all
other generally believed responsible mechanisms, like Rayleigh scattering,
sample (visco)elasticity, damping of the ultrasonic tip motion, and ultrasound
attenuation. Our analytical description paves the way for quantitative
SubSurface-AFM imaging.


title:
Strangeness Production in Light and Intermediate size Nucleus-Nucleus
  Collisions

abstract:
  Within the statistical model, the net strangeness conservation and incomplete
total strangeness equilibration lead to the suppression of strange particle
multiplicities. Furthermore, suppression effects appear to be stronger in small
systems. By treating the production of strangeness within the canonical
ensemble formulation we developed a simple model which allows to predict the
excitation function of $K^+/\pi^+$ ratio in nucleus-nucleus collisions. In
doing so we assumed that different values of $K^+/\pi^+$, measured in p+p and
Pb+Pb interactions at the same collision energy per nucleon, are driven by the
finite size effects only. These predictions may serve as a baseline for
experimental results from NA61/SHINE at the CERN SPS and the future CBM
experiment at FAIR.


title: Collective excitations of a trapped Fermi gas at finite temperature

abstract:
  We study collective excitations of a trapped Fermi gas at finite temperature
using the Bogoliubov-deGennes mean-field theory in conjunction with the
generalized random phase approximation. The collective excitations are analyzed
through the density response of a monopole excitation. We show the appearance
of several modes at the normal fluid - superfluid phase transition temperature:
Higgs mode-like pairing amplitude modulations, analogues of the second sound in
the trapped gas, and an edge mode that is also the strongest mode in the
response.


title: Over-cooled haloes at z > 10: a route to form low-mass first stars

abstract:
  It has been shown by Shchekinov & Vasiliev2006 (SV06) that HD molecules can
be an important cooling agent in high redshift z >10 haloes if they undergo
mergers under specific conditions so suitable shocks are created. Here we build
upon Prieto et al. (2012) who studied in detail the merger-generated shocks,
and show that the conditions for HD cooling can be studied by combining these
results with a suite of dark-matter only simulations. We have performed a
number of dark matter only simulations from cosmological initial conditions
inside boxes with sizes from 1 to 4 Mpc. We look for haloes with at least two
progenitors of which at least one has mass M > M_cr (z), where M_cr (z) is the
SV06 critical mass for HD over-cooling. We find that the fraction of
over-cooled haloes with mass between M_cr (z) and 10^{0.2} M_cr (z), roughly
below the atomic cooling limit, can be as high as ~ 0.6 at z ~ 10 depending on
the merger mass ratio. This fraction decreases at higher redshift reaching a
value ~0.2 at z ~ 15. For higher masses, i.e. above 10^{0.2} M_cr (z) up to
10^{0.6} M_cr (z), above the atomic cooling limit, this fraction rises to
values ~ 0.8 until z ~ 12.5. As a consequence, a non negligible fraction of
high redshift z > 10 mini-haloes can drop their gas temperature to the Cosmic
Microwave Background temperature limit allowing the formation of low mass stars
in primordial environments.


title: OAO/MITSuME Photometry of Dwarf Novae: I SU Ursae Majoris

abstract:
  We report on simultaneous $g'$, $R_{\rm c}$ and $I_{\rm c}$ photometry of SU
Ursae Majoris during 2011 December - 2012 February using OAO/MITSuME. Our
photometry revealed that quiescence is divided into three types based on the
magnitude and color. Quiescent light curves showed complicated profiles with
various amplitudes and time scales. Although no superoutbursts were observed
during our run, five normal outbursts occurred with intervals of 11 - 21 d. The
shapes of the normal outbursts were characteristic of the outside-in type.
During the rising phase of a normal outburst, the light curve showed periodic
modulations with a period of ${\sim}$ 0.048111(354) d, but the origin of this
peirod was unclear. We examined daily averaged color-color diagram and found
that two cycles exist. This implies that the thermal limit cycle in SU UMa is
complicated. We newly discovered that $g'-R_{\rm c}$ becomes red about 3 days
prior to an outburst. Although the working mechanism on this reddening is
unclear, we propose two possibilities: one is that the inner portion of the
accretion disk is filled by matter and obscures the central white dwarf, and
the other is that the stagnation effect works in the outer region of the
accretion disk.


title:
Equivalent characterizations of hyperbolic H\"older potential for
  interval maps

abstract:
  Consider a topologically exact $C^3$ interval map without non-flat critical
points. Following the works we did in \cite{LiRiv12two}, we give two equivalent
characterizations of hyperbolic H\"{o}lder continuous potential in terms of the
Lyapunov exponents and the measure-theoretic entropies of equilibrium states
for those potentials.


title:
Two-particle-correlations in a functional renormalization group scheme
  using a dynamical mean-field theory approach

abstract:
  We apply a recently introduced hybridization-flow functional renormalization
group scheme for Anderson-like impurity models as an impurity solver in a
dynamical mean-field theory (DMFT) approach to lattice Hubbard models. We
present how this scheme is capable of reproducing metallic and insulating
solutions of the lattice model. Our setup also offers a numerically rather
inexpensive method to calculate two-particle correlation functions. For the
paramagnetic Hubbard-model on the Bethe lattice in infinite dimensions we
calculate the local two-particle-vertex for the metallic and the insulating
phase. Then we go to a two-site cluster-DMFT-scheme for the two-dimensional
Hubbard-model that includes short-range antiferromagnetic fluctuations and
obtain the local and non-local two-particle-vertex-functions. We discuss the
rich frequency structures of these vertices and compare with the vertex in the
single-site solution.


title:
Continuous orbit equivalence of topological Markov shifts and
  Cuntz-Krieger algebras

abstract:
  Let A,B be square irreducible matrices with entries in {0,1}. We will show
that if the one-sided topological Markov shifts (X_A,\sigma_A) and
(X_B,\sigma_B) are continuously orbit equivalent, then the two-sided
topological Markov shifts (\bar X_A,\bar\sigma_A) and (\bar X_B,\bar\sigma_B)
are flow equivalent, and hence det(id-A)=det(id-B). As a result, the one-sided
topological Markov shifts (X_A,\sigma_A) and (X_B,\sigma_B) are continuously
orbit equivalent if and only if the Cuntz-Krieger algebras O_A and O_B are
isomorphic and det(id-A)=det(id-B).


title: Performance Analysis of Strained Monolayer MoS$_{2}$ MOSFET

abstract:
  We present a computational study on the impact of tensile/compressive
uniaxial ($\varepsilon_{xx}$) and biaxial ($\varepsilon_{xx}=\varepsilon_{yy}$)
strain on monolayer MoS$_{2}$ NMOS and PMOS FETs. The material properties like
band structure, carrier effective mass and the multi-band Hamiltonian of the
channel, are evaluated using the Density Functional Theory (DFT). Using these
parameters, self-consistent Poisson-Schr\"{o}dinger solution under the
Non-Equilibrium Green's Function (NEGF) formalism is carried out to simulate
the MOS device characteristics. 1.75$%$ uniaxial tensile strain is found to
provide a minor (6$%$) ON current improvement for the NMOSFET, whereas same
amount of biaxial tensile strain is found to considerably improve the PMOSFET
ON currents by 2-3 times. Compressive strain however degrades both NMOS and
PMOS device performance. It is also observed that the improvement in PMOSFET
can be attained only when the channel material becomes indirect-gap in nature.
We further study the performance degradation in the quasi-ballistic long
channel regime using a projected current method.


title:
Spin Susceptibility and Strong Coupling Effects in an Ultracold Fermi
  Gas

abstract:
  We investigate magnetic properties and strong coupling corrections in the BCS
(Bardeen-Cooper-Schrieffer)-BEC (Bose-Einstein condensation) crossover regime
of an ultracold Fermi gas. Within the framework of an extended $T$-matrix
theory, we calculate the spin susceptibility $\chi$ above the superfluid phase
transition temperature $T_{\rm c}$. In the crossover region, the formation of
preformed Cooper pairs is shown to cause a non-monotonic temperature dependence
of $\chi$, which is similar to the so-called spin-gap phenomenon observed in
the under-doped regime of high-$T_{c}$ cuprates. From this behavior of $\chi$,
we determine the spin-gap temperature as the temperature at which $\chi$ takes
a maximum value, in the BCS-BEC crossover region. Since the spin susceptibility
is sensitive to the formation of singlet Cooper pairs, our results would be
useful in considering the temperature region where pairing fluctuations are
important in the BCS-BEC crossover regime of an ultracold Fermi gas.


title:
Estimates of transition densities and their derivatives for jump L\'evy
  processes

abstract:
  We give upper and lower estimates of densities of convolution semigroups of
probability measures under explicit assumptions on the corresponding Levy
measure and the Levy--Khinchin exponent. We obtain also estimates of
derivatives of densities.


title: Submodularity of a Set Label Disagreement Function

abstract:
  A set label disagreement function is defined over the number of variables
that deviates from the dominant label. The dominant label is the value assumed
by the largest number of variables within a set of binary variables. The
submodularity of a certain family of set label disagreement function is
discussed in this manuscript. Such disagreement function could be utilized as a
cost function in combinatorial optimization approaches for problems defined
over hypergraphs.


title: Global Smooth Solution of Nonlinear Schr\"odinger Equation

abstract:
  The spatially periodic initial problem and Cauchy problem for nonlinear
Schr\"odinger equations are considered. The existence and uniqueness of global
solution with infinite smooth initial data $u_0$, i.e. $u_0,\;|u_0|^{2p}u_0\in
H^{\infty}$, are established. Moreover these two problem with initial data
$u_0\in H^m$ are globally well-posed provided the Fourier frequency of $u_0$ is
contained in a bounded compact set. The equations studied here cover $L^2$ and
$\dot{H}^1$ critical and supercritical, defocusing and focusing nonlinear
Schr$\ddot{o}$dinger equations.


title: Molten Air -- A new, highest energy class of rechargeable batteries

abstract:
  This study introduces the principles of a new class of batteries,
rechargeable molten air batteries, and several battery chemistry examples are
demonstrated. The new battery class uses a molten electrolyte, are quasi
reversible, and have amongst the highest intrinsic battery electric energy
storage capacities. Three examples of the new batteries are demonstrated. These
are the iron, carbon and VB2 molten air batteries with respective intrinsic
volumetric energy capacities of 10,000, 19,000 and 27,000 Wh per liter.


title:
Impact of intrinsic deformations on the negative differential resistance
  of monolayer MoS$_2$ ultra-short channel MOSFET

abstract:
  In this work we present a study on the impact of various intrinsic
deformations like ripples, twist, wrap on the electronic properties of
ultra-short monolayer MoS2 channels. The effect of deformation (3-7o twist or
wrap and 0.3-0.7 buckling amplitude) on a 3.5 nm planar monolayer MoS2 MOSFET
is evaluated by the density functional theory and the non-equilibrium Green`s
function (DFT-NEGF) approach. We study the channel density of states,
transmission spectra and the ID-VD characteristics under the varying
conditions, with focus on the negative differential resistance (NDR) behavior.
Our results show significant change in the NDR peak to valley ratio (PVR) and
the NDR window with such minor intrinsic deformations, especially with the
rippling.


title: Fourier-Laguerre transform, convolution and wavelets on the ball

abstract:
  We review the Fourier-Laguerre transform, an alternative harmonic analysis on
the three-dimensional ball to the usual Fourier-Bessel transform. The
Fourier-Laguerre transform exhibits an exact quadrature rule and thus leads to
a sampling theorem on the ball. We study the definition of convolution on the
ball in this context, showing explicitly how translation on the radial line may
be viewed as convolution with a shifted Dirac delta function. We review the
exact Fourier-Laguerre wavelet transform on the ball, coined flaglets, and show
that flaglets constitute a tight frame.


title: Probing Majorana fermions in the tunneling spectra of a resonant level

abstract:
  Unambiguous identification of Majorana physics presents an outstanding
problem whose solution could render topological quantum computing feasible. We
develop a numerical approach to treat finite-size superconducting chains
supporting Majorana fermions, which is based on iterative application of a
two-site Bogoliubov transformation. We demonstrate the applicability of the
method by studying a resonant level attached to the superconductor subject to
external perturbations. In the topological phase, we show that the spectrum of
a single resonant level allows to distinguish peak coming from Majorana physics
from the Kondo resonance.


title: Jet models for black-hole binaries in the hard spectral state

abstract:
  This is part one of our study of models of jets with distributed electron
acceleration. We present here our assumptions, basic equations, and their
solutions for the steady-state electron distribution. We assume the shape of
the rate of electron acceleration and the dependencies of its normalization and
the magnetic field strength on the height along the jet. Our focus is on the
hard spectral state of black-hole binaries, for which we take into account that
their typical radio spectra are flat. This appears to require a constant
dissipation rate per unit logarithmic length and conservation of the magnetic
energy flux. Our electron kinetic equation includes adiabatic and radiative
losses and advection, and our photon radiative transfer equation includes
synchrotron absorption and emission and Compton emission. Apart from the
self-Compton process, we take into account Compton scattering of stellar and
accretion photons and absorption of very-high energy gamma-rays by pair
production on soft photons. We present a general solution of the kinetic
equation with advection and radiative and adiabatic losses and an analytic
solution in the case of dominant synchrotron losses in conical jets. In the
following paper, we present detailed spectra resulting from our equations as
applied to Cyg X-1.


title: The Oxford Questions on the foundations of quantum physics

abstract:
  The twentieth century saw two fundamental revolutions in physics --
relativity and quantum. Daily use of these theories can numb the sense of
wonder at their immense empirical success. Does their instrumental
effectiveness stand on the rock of secure concepts or the sand of unresolved
fundamentals? Does measuring a quantum system probe, or even create, reality,
or merely change belief? Must relativity and quantum theory just co-exist or
might we find a new theory which unifies the two? To bring such questions into
sharper focus, we convened a conference on Quantum Physics and the Nature of
Reality. Some issues remain as controversial as ever, but some are being nudged
by theory's secret weapon of experiment.


title:
Two-stage melting induced by dislocations and grain boundaries in
  Monolayers of Hard Spheres

abstract:
  Melting in two-dimensional systems has remained controversial as theory,
simulations, and experiments show contrasting results. One issue that obscures
this discussion is whether or not theoretical predictions on strictly 2D
systems describe those of quasi-2D experimental systems, where out-of-plane
fluctuations may alter the melting mechanism. Using event-driven Molecular
Dynamics simulations, we find that the peculiar two-stage melting scenario of a
continuous solid-hexatic and a first-order hexatic-liquid transition as
observed for a truly 2D system of hard disks [Bernard and Krauth, Phys. Rev.
Lett. 107, 155704 (2011)] persists for a quasi-2D system of hard spheres with
out-of-plane particle motions as high as half the particle diameter. By
calculating the renormalized Young's modulus, we show that the solid-hexatic
transition is of the Kosterlitz-Thouless type, and occurs via dissociation of
bound dislocation pairs. In addition, we find a first-order hexatic-liquid
transition that seems to be driven by a spontaneous proliferation of grain
boundaries.


title: A multi-level spectral deferred correction method

abstract:
  The spectral deferred correction (SDC) method is an iterative scheme for
computing a higher-order collocation solution to an ODE by performing a series
of correction sweeps using a low-order timestepping method. This paper examines
a variation of SDC for the temporal integration of PDEs called multi-level
spectral deferred corrections (MLSDC), where sweeps are performed on a
hierarchy of levels and an FAS correction term, as in nonlinear multigrid
methods, couples solutions on different levels. Three different strategies to
reduce the computational cost of correction sweeps on the coarser levels are
examined: reducing the degrees of freedom, reducing the order of the spatial
discretization, and reducing the accuracy when solving linear systems arising
in implicit temporal integration. Several numerical examples demonstrate the
effect of multi-level coarsening on the convergence and cost of SDC
integration. In particular, MLSDC can provide significant savings in compute
time compared to SDC for a three-dimensional problem.


title: Two dimensional hydrodynamics with gauge and gravitational anomalies

abstract:
  We present a new approach to discuss two dimensional chiral and non-chiral
hydrodynamics with gauge and gravitational anomalies. Exact constitutive
relations for the stress tensor and charge current are obtained. For the chiral
theory, the constitutive relations may be put in the ideal (chiral) fluid form
whereas the constitutive relations corresponding to non-chiral case do not take
the ideal fluid form. The constitutive relations in the presence of both
gravity and gauge sectors are new. These expressions, in the absence of the
gauge sector, reproduce the results obtained in the gradient expansion
approach.


title: Stability of Bianchi attractors in Gauged Supergravity

abstract:
  In this paper, we analyse the stability of extremal black brane horizons with
homogeneous symmetry in the spatial directions in five dimensional gauged
supergravity, under the fluctuations of the scalar fields about their attractor
values. We examine the scalar fluctuation equations at the linearised level and
demand that the fluctuations vanish as one approaches the horizon. Imposing
certain restrictions on the Killing vectors used for gauging we find that the
necessary conditions for stability are satisfied only by a subclass of the
Bianchi metrics whose symmetry group factorises into a two dimensional Lifshitz
symmetry and any homogeneous symmetry group given by the Bianchi
classification. We apply these results to a simple example of a gauged
supergravity model with one vector multiplet to find the stable attractors.


title:
A variational mode solver for optical waveguides based on
  quasi-analytical vectorial slab mode expansion

abstract:
  A flexible and efficient method for fully vectorial modal analysis of 3D
dielectric optical waveguides with arbitrary 2D cross-sections is proposed. The
technique is based on expansion of each modal component in some a priori
defined functions defined on one coordinate axis times some unknown
coefficient-functions, defined on the other axis. By applying a variational
restriction procedure the unknown coefficient-functions are determined,
resulting in an optimum approximation of the true vectorial mode profile. This
technique can be related to both Effective Index and Mode Matching methods. A
couple of examples illustrate the performance of the method.


title: Influence of Rotation on Stellar Evolution

abstract:
  The Sun has been known to rotate for more than 4 centuries, and evidence is
also available through direct measurements, that almost all stars rotate. In
this lecture, I will propose a review of the different physical processes
associated to rotation that are expected to impact the evolution of stars. I
will describe in detail the way these physical processes are introduced in 1D
stellar evolution codes and how their introduction in the modelling has
impacted our understanding of the internal structure, nucleosynthesis and
global evolution of stars.


title:
(S)QCD on R^3 x S^1: Screening of Polyakov loop by fundamental quarks
  and the demise of semi-classics

abstract:
  Recently, it was argued that the thermal deconfinement transition in pure
Yang-Mills theory is continuously connected to a quantum phase transition in
softly-broken N=1 SYM theory on R^3 x S^1. The transition is semiclassically
calculable at small S^1 size L, occurs as the soft mass m_soft and L vary, and
is driven by a competition between perturbative effects and nonperturbative
topological molecules. These are correlated instanton--anti-instanton tunneling
events, whose constituents are monopole-instantons "bound" by attractive
long-range forces. The mechanism driving the transition is universal for all
simple gauge groups, with or without a center, such as SU(N) or G_2. Here, we
consider theories with fundamental quarks. We examine the role topological
objects play in determining the fate of the (exact or approximate)
center-symmetry in SU(2) SQCD, with or without soft-breaking terms. In theories
whose large-m_soft limit is thermal nonsupersymmetric QCD with massive quarks,
we find a crossover of the Polyakov loop, from approximately center-symmetric
at small 1/L to maximally center-broken at larger 1/L, as seen in lattice
thermal QCD with massive quarks and T=1/L. We argue that in all calculable
cases, including SQCD with exact center symmetry, quarks deform
instanton-monopoles by their quantum fluctuations and do not contribute to
their binding. The semiclassical approximation and the molecular picture of the
vacuum fail, upon decreasing the quark mass, precisely when quarks would begin
mediating a long-range attractive force between monopole-instantons, calling
for a dual description of the resulting strong-coupling theory.


title: Lattice induced threshold functions and Boolean functions

abstract:
  Lattice induced threshold function is a Boolean function determined by a
particular linear combination of lattice elements. We prove that every isotone
Boolean function is a lattice induced threshold function and vice versa. We
also represent lattice valued up-sets on a finite Boolean lattice in the
framework of cuts and lattice induced threshold functions. In terms of closure
systems we present necessary and sufficient conditions for a representation of
lattice valued up-sets on a finite Boolean lattice by linear combinations of
elements of the co-domain lattice.


title: Tools for calculations in color space

abstract:
  Both the higher energy and the initial state colored partons contribute to
making exact calculations in QCD color space more important at the LHC than at
its predecessors. This is applicable whether the method of assessing QCD is
fixed order calculation, resummation, or parton showers. In this talk we
discuss tools for tackling the problem of performing exact color summed
calculations. We start with theoretical tools in the form of the (standard)
trace bases and the orthogonal multiplet bases (for which a general method of
construction was recently presented). Following this, we focus on two new
packages for performing color structure calculations: one easy to use
Mathematica package, ColorMath, and one C++ package, ColorFull, which is
suitable for more demanding calculations, and for interfacing with event
generators.


title:
Optimal exercise of swing contracts in energy markets: an integral
  constrained stochastic optimal control problem

abstract:
  We characterize the value of swing contracts in continuous time as the unique
viscosity solution of a Hamilton-Jacobi-Bellman equation with suitable boundary
conditions. The case of contracts with penalties is straightforward, and in
that case only a terminal condition is needed. Conversely, the case of
contracts with strict constraints gives rise to a stochastic control problem
with a nonstandard state constraint. We approach this problem by a penalty
method: we consider a general constrained problem and approximate the value
function with a sequence of value functions of appropriate unconstrained
problems with a penalization term in the objective functional. Coming back to
the case of swing contracts with strict constraints, we finally characterize
the value function as the unique viscosity solution with polynomial growth of
the Hamilton-Jacobi-Bellman equation subject to appropriate boundary
conditions.


title:
Electron Beam Evolution and Radio Emission in the Inhomogeneous Solar
  Corona

abstract:
  This thesis considers the propagation of accelerated electron beams in
plasma. We consider the wave particle interactions these undergo which cause
their evolution, the effects of plasma density inhomogeneities on these
interactions, and the effects this may have on the production of hard X-ray and
radio emission by the beam. ...


title: Homological algebra for osp(1/2n)

abstract:
  We discuss several topics of homological algebra for the Lie superalgebra
osp(1|2n). First we focus on Bott-Kostant cohomology, which yields classical
results although the cohomology is not given by the kernel of the Kostant
quabla operator. Based on this cohomology we can derive strong
Bernstein-Gelfand-Gelfand resolutions for finite dimensional osp(1|2n)-modules.
Then we state the Bott-Borel-Weil theorem which follows immediately from the
Bott-Kostant cohomology by using the Peter-Weyl theorem for osp(1|2n). Finally
we calculate the projective dimension of irreducible and Verma modules in the
category O.


title:
Prediction of phonon-mediated high temperature superconductivity in
  stoichiometric Li$_2$B$_3$C

abstract:
  The discovery of superconductivity in Magnesium Diborate (MgB$_2$) has
stimulated great interest in the search of new superconductors with similar
lattice structures. Unlike cuprate or iron-based superconductors, MgB$_2$ is
indisputably a phonon-mediated high temperature superconductor. The emergence
of high temperature superconductivity in this material results from the strong
coupling between the boron $\sigma$-bonding electrons around the Fermi level
and the bond-stretching optical phonon modes. Here we show, based on the
first-principles calculations, that Li$_2$B$_3$C is such a good candidate of
superconductor whose superconducting transition temperature (T$_c$) might be
even higher than MgB$_2$. Li$_2$B$_3$C consists of alternating graphene-like
boron-carbon layers and boron-boron layers with intercalated lithium atoms
between them. Similar to MgB$_2$, Li$_2$B$_3$C is inherently metallic and
possesses two $\sigma$- and two $\pi$-electron bands around the Fermi energy.
The superconducting pairs are glued predominately by the strong interaction
between boron $\sigma$-bonding electrons and various optical phonon modes.


title: Steenrod operations and the diagonal morphism

abstract:
  We show how to find the Steenrod operations in H^*(X) (the coefficients in
F_p) given the diagonal morphism d_#:S_*(X)->S_*(X^p) and the action of the
cyclic group C_p on S_*(X^p). Our construction needs no other data such as
Eilenberg-Zilber morphisms.


title: Distribution of quantum discord in Heisenberg Antiferromagnets

abstract:
  The quantum discord, which quantifies the amount of quantum correlations
present between parts of a system, is investigated for antiferromagnetic spin
systems. The discord for a pair of spins in the many-spin ground state is
related to the diagonal and off-diagonal spin-spin correlation functions and
the local magnetization. For isotropic and translationally invariant states,
the discord is shown to be a function of the diagonal correlation function
only. Thus, near a thermal/quantum critical point, the discord for a pair of
spins shows long-range behavior, analogously of the correlation function. The
discord exhibits a kink singularity as a function of the anisotropy parameter
for the the ground state of the Heisenberg model, for both nearest-neighbor
spins as well as for well-separated spins. The preferred measurement basis for
the minimum conditional entropy, which determines the discord, changes
discontinuously across the critical point. The conditional entropy distribution
over all possible the measurement basis is investigated. For the isotropic
model, the distribution is just a delta-function, whereas it has a twin-peak
structure for anisotropic model. It is shown that the average value and the
mean-square fluctuation of the conditional entropy also show a signature of the
critical-point behavior.


title:
Constructing bispectral orthogonal polynomials from the classical
  discrete families of Charlier, Meixner and Krawtchouk

abstract:
  Given a sequence of polynomials $(p_n)_n$, an algebra of operators
$\mathcal{A}$ acting in the linear space of polynomials and an operator $D_p\in
\mathcal{A}$ with $D_p(p_n)=np_n$, we form a new sequence of polynomials
$(q_n)_n$ by considering a linear combination of $m$ consecutive $p_n$:
$q_n=p_n+\sum_{j=1}^m\beta_{n,j}p_{n-j}$. Using the concept of
$\mathcal{D}$-operator, we determine the structure of the sequences
$\beta_{n,j}, j=1,\ldots,m,$ in order that the polynomials $(q_n)_n$ are common
eigenfunctions of an operator in the algebra $\mathcal{A}$. As an application,
from the classical discrete families of Charlier, Meixner and Krawtchouk we
construct orthogonal polynomials $(q_n)_n$ which are also eigenfunctions of
higher order difference operators.


title: Optimal Rendezvous Path Planning to an Uncontrolled Tumbling Target

abstract:
  As the number of uncontrollable objects in low earth orbit is rising, the
thread of collisions and thus the breakdown of working satellites becomes worth
analyzing. Consequently, projects on removing objects from the important orbits
are taken into account by the international space associations. This paper is
about the modelling and optimal path planning of a docking maneuver to an
uncontrollable tumbling target. After deriving the system dynamics, we
introduce boundary conditions to ensure a safe and realizable maneuver and a
general Bolza type cost functional to incorporate different optimization goals.
In order to solve the resulting problem, we transform the dynamics to a set of
differential algebraic equations which allow us to employ a direct optimization
method while perserving the energy of the system. The concluding simulation
results show the reliability and effectiveness of this approach.


title: Disorder-induced mechanism for positive exchange bias fields

abstract:
  We propose a mechanism to explain the phenomenon of positive exchange bias on
magnetic bilayered systems. The mechanism is based on the formation of a domain
wall at a disordered interface during field cooling (FC) which induces a
symmetry breaking of the antiferromagnet, without relying on any ad hoc
assumption about the coupling between the ferromagnetic (FM) and
antiferromagnetic (AFM) layers. The domain wall is a result of the disorder at
the interface between FM and AFM, which reduces the effective anisotropy in the
region. We show that the proposed mechanism explains several known experimental
facts within a single theoretical framework. This result is supported by Monte
Carlo simulations on a microscopic Heisenberg model, by micromagnetic
calculations at zero temperature and by mean field analysis of an effective
Ising like phenomenological model.


title: Enhanced sources of acoustic power surrounding AR11429

abstract:
  Multi-frequency power maps of the local acoustic oscillations show acoustic
enhancements (\acoustic-power halos") at high frequencies surrounding large
active region. Computational seismic holography reveals a high-frequency
\acoustic-emission halo", or \seismic glory" surrounding large active regions.
In this study, we have applied computational seismic holography to map the
seismic seismic source density surrounding AR 11429. Studies of HMI/SDO Doppler
data, shows that the "acoustic halos" and the "seismic glories" are prominent
at high frequencies 5-8 mHz. We investigate morphological properties of
acoustic-power and acoustic emission halos around an active region to see if
they are spatially correlated. Details about the local magnetic field from
vectormagnetograms of AR 11429 are included. We identify a 15" region of
seismic deficit power (dark moat) shielding the white-light boundary of the
active region. The size of the seismic moat is related to region of
intermediate magnetic field strength. The acoustic moat is circled by the halo
of enhanced seismic amplitude as well as enhanced seismic emission. Overall,
the results suggest that features are related. However, if we narrow the
frequency band to 5.5-6.5 mHz, we find that the seismic source density
dominates over the local acoustic power, suggesting the existence of sources
that emit more energy downward into the solar interior than upward toward the
solar surface.


title:
The elephant in the room: multi-authorship and the assessment of
  individual researchers

abstract:
  When a group of individuals creates something, credit is usually divided
among them. Oddly, that does not apply to scientific papers. The most commonly
used performance measure for individual researchers is the h-index, which does
not correct for multi-authorship. Each author claims full credit for each paper
and each ensuing citation. This mismeasure of achievement is fuelling a
flagrant increase in multi-authorship. Several alternatives to the h-index have
been devised, and one of them, the individual h-index (hI), is logical,
intuitive and easily calculated. Correcting for multi-authorship would end
gratuitous authorship and allow proper attribution and unbiased comparisons.


title: A new perspective on CP and T violation

abstract:
  It is shown that the results of CP and T violation experiments can be
interpreted using a very general framework that does not require a Hilbert
space of states or linear operators to represent the symmetries or dynamics.
Analysis within this general framework brings out the aspects of quantum
mechanics that are essential for this interpretation. More importantly, should
quantum mechanics be eventually replaced by a new paradigm, this framework
could \emph{still} be used to establish violation of CP and T invariance from
the already known experimental results.
  This work arose as a `formal response' to a talk "Three Merry Roads to
T-Violation" by Dr. Bryan Roberts [1]. Both talks were given at a "Workshop on
Cosmology and Time" held at Penn State in April 2013, which brought together
physicists and philosophers of science.


title: Byzantine Convex Consensus: An Optimal Algorithm

abstract:
  Much of the past work on asynchronous approximate Byzantine consensus has
assumed scalar inputs at the nodes [4, 8]. Recent work has yielded approximate
Byzantine consensus algorithms for the case when the input at each node is a
d-dimensional vector, and the nodes must reach consensus on a vector in the
convex hull of the input vectors at the fault-free nodes [9, 13]. The
d-dimensional vectors can be equivalently viewed as points in the d-dimensional
Euclidean space. Thus, the algorithms in [9, 13] require the fault-free nodes
to decide on a point in the d-dimensional space.
  In our recent work [arXiv:/1307.1051], we proposed a generalization of the
consensus problem, namely Byzantine convex consensus (BCC), which allows the
decision to be a convex polytope in the d-dimensional space, such that the
decided polytope is within the convex hull of the input vectors at the
fault-free nodes. We also presented an asynchronous approximate BCC algorithm.
  In this paper, we propose a new BCC algorithm with optimal fault-tolerance
that also agrees on a convex polytope that is as large as possible under
adversarial conditions. Our prior work [arXiv:/1307.1051] does not guarantee
the optimality of the output polytope.


title:
Toward affect-inclusive models of cognitive dynamics: Coupling
  epistemological resources and emotions

abstract:
  Many prominent lines of research on student's reasoning and conceptual change
within learning sciences and physics education research have not attended to
the role of learners' affect or emotions in the dynamics of their conceptual
reasoning. This is despite evidence from psychology and cognitive- and neuro-
sciences that emotions are deeply integrated with cognition and documented
associations in education research between emotions and academic performance.
The few studies that have aimed to integrate emotions within models of
learners' cognition, have mostly done so at a coarse grain size. In this
manuscript, toward the long-term goal of incorporating emotions into
fine-grained models of in-themoment cognitive dynamics, we present a case study
of Judy, an undergraduate electrical engineering and physics major. We argue
that a fine-grained aspect of Judy's affect, her annoyance at a particular kind
of homework problem, stabilizes a context-dependent epistemological stance she
displays, about an unbridgeable gulf she perceives to exist between real and
ideal circuits.


title: Cheeger-harmonic functions in metric measure spaces revisited

abstract:
  Let $(X,d,\mu)$ be a complete metric measure space, with $\mu$ a locally
doubling measure, that supports a local weak $L^2$-Poincar\'e inequality. By
assuming a heat semigroup type curvature condition, we prove that
Cheeger-harmonic functions are Lipschitz continuous on $(X,d,\mu)$. Gradient
estimates for Cheeger-harmonic functions and solutions to a class of non-linear
Poisson type equations are presented.


title: Investigating independent subsets of graphs, with Mathematica

abstract:
  With this work we aim to show how Mathematica can be a useful tool to
investigate properties of combinatorial structures. Specifically, we will face
enumeration problems on independent subsets of powers of paths and cycles,
trying to highlight the correspondence with other combinatorial objects with
the same cardinality. Then we will study the structures obtained by ordering
properly independent subsets of paths and cycles. We will approach some
enumeration problems on the resulting partially ordered sets, putting in
evidence the correspondences with structures known as Fibonacci and Lucas
Cubes.


title: Statistics of Local Seismic Emission from the Solar Granulation

abstract:
  We apply computational seismic holography to high-frequency helioseismic
observations of the quiet Sun from SDO/HMI to locate predominant sources of
seismic emission with respect to the structure of the solar granulation. The
regions of greatest seismic emission are the edges of photospheric granules.
Seismic emission from regions whose continuum brightnesses are 95-100% of the
mean, as resolved by HMI, are about 2.5 times as emissive as regions whose
brightnesses are 100-104% of the mean. The greater seismic emissivity from
regions whose brightnesses are somewhat less than the mean is roughly in line
with expectations from an understanding that attributes most seismic emission
to cool plumes plummeting from the edges of granules. However, seismic emission
from regions whose continuum brightnesses significantly exceed 104% of the mean
is also remarkably high. This unexpected feature of high-frequency seismic
emission from the solar granulation begs to be understood.


title: Statistical data mining for symbol associations in genomic databases

abstract:
  A methodology is proposed to automatically detect significant symbol
associations in genomic databases. A new statistical test is proposed to assess
the significance of a group of symbols when found in several genesets of a
given database. Applied to symbol pairs, the thresholded p-values of the test
define a graph structure on the set of symbols. The cliques of that graph are
significant symbol associations, linked to a set of genesets where they can be
found. The method can be applied to any database, and is illustrated MSigDB C2
database. Many of the symbol associations detected in C2 or in non-specific
selections did correspond to already known interactions. On more specific
selections of C2, many previously unkown symbol associations have been
detected. These associations unveal new candidates for gene or protein
interactions, needing further investigation for biological evidence.


title: Korn inequality on irregular domains

abstract:
  In this paper, we study the weighted Korn inequality on some irregular
domains, e.g., $s$-John domains and domains satisfying quasi-hyperbolic
boundary conditions. Examples regarding sharpness of the Korn inequality on
these domains are presented. Moreover, we show that Korn inequalities imply
certain Poincar\'e inequality.


title: The Allcock Ball Quotient

abstract:
  In this article we provide further evidence for the monstrous proposal of
Daniel Allcock, by giving a plausible but still conjectural explanation for the
deflation relation in the Coxeter group quotient of the orbifold fundamental
group.


title:
Solvability of the divergence equation implies John via Poincar\'e
  inequality

abstract:
  Let $\Omega \subset \rr^2$ be a bounded simply connected domain. We show
that, for a fixed (every) $p\in (1,\fz),$ the divergence equation
$\mathrm{div}\,\mathbf{v}=f$ is solvable in $W^{1,p}_0(\Omega)^2$ for every
$f\in L^p_0(\Omega)$, if and only if $\Omega$ is a John domain, if and only if
the weighted Poincar\'e inequality $$\int_\Omega|u(x)-u_{\Omega}|^q\,dx\le
C\int_\Omega|\nabla u(x)|^q\dist(x,\partial \Omega)^q\,dx$$ holds for some
(every) $q\in [1,\fz)$. In higher dimensions similar results are proved under
some additional assumptions on the domain in question.


title:
The Kramers-Kronig relations for usual and anomalous
  Poisson-Nernst-Planck models

abstract:
  The consistency of the frequency response predicted by a class of
electrochemical impedance expressions is analytically checked by invoking the
Kramers-Kronig (KK) relations. These expressions are obtained in the context of
Poisson-Nernst-Planck usual (PNP) or anomalous (PNPA) diffusional models that
satisfy Poisson's equation in a finite-length situation. The theoretical
results, besides being successful in interpreting experimental data, are also
shown to obey the KK relations when these relations are modified accordingly


title: UHF slicing and classification of nuclear C*-algebras

abstract:
  In this paper we show that certain simple locally recursive subhomogeneous
(RSH) C*-algebras are tracially approximately interval algebras after tensoring
with the universal UHF algebra. This involves a linear algebraic encoding of
the structure of the local RSH algebra allowing us to find a path through the
algebra which looks like a discrete version of [0,1] and exhausts most of the
algebra. We produce an actual copy of the interval and use properties of
C*-algebras tensored with UHF algebras to move the honest interval underneath
the discrete version. It follows from our main result that such C*-algebras are
classifiable by Elliott invariants. Our theorem requires finitely many tracial
states that all induce the same state on the K_0-group; in particular we do not
require that projections separate tracial states. We apply our results to
classify some examples of C*-algebras constructed by Elliott to exhaust the
invariant. We also give an alternate way to classify examples of Lin and Matui
of C*-algebras of minimal dynamical systems. In this way our result can be
viewed as a first step towards removing the requirement that projections
separate tracial states in the classification theorem for C*-algebras of
minimal dynamical systems given by Toms and the second named author.


title: Building Bricks with Bricks, with Mathematica

abstract:
  In this work we solve a special case of the problem of building an
n-dimensional parallelepiped using a given set of n-dimensional
parallelepipeds. Consider the identity x^3 = x(x-1)(x-2)+3x(x-1+x). For
sufficiently large x, we associate with x^3 a cube with edges of size x, with
x(x-1)(x-2) a parallelepiped with edges x, x-1, x-2, with 3x(x-1+x) three
parallelepipeds of edges x, x-1, 1, and with x a parallelepiped of edges x, 1,
1. The problem we takle is the actual construction of the cube using the given
parallelepipeds. In [DDNP90] it was shown how to solve this specific problem
and all similar instances in which a (monic) polynomial is expressed as a
linear combination of a persistent basis. That is to say a sequence of
polynomials q_0 = 1, and q_k(x) = q_{k-1}(x)(x-r_k) for k > 0. Here, after
[Fil10], we deal with a multivariate version of the problem with respect to a
basis of polynomials of the same degree (binomial basis). We show that it is
possible to build the parallelepiped associated with a multivariate polynomial
P(x_1, ..., x_n)=(x_1- s_1)...(x_n-s_n) with integer roots, using the
parallelepipeds described by the elements of the basis. We provide an algorithm
in Mathematica to solve the problem for each n. Moreover, for n = 2, 3, 4 (in
the latter case, only when a projection is possible) we use Mathematica to
display a step by step construction of the parallelepiped P(x1,...,x_n).