title:
Observation of a molecule-metal interface charge transfer state by
  resonant photoelectron spectroscopy

abstract:
  We report the discovery of a novel charge transfer (CT) state at a
molecule-metal interface by the application of resonant photoelectron
spectroscopy (ResPES). This interface feature is neither present for molecular
bulk samples nor for the clean substrate. Within a simplified two-step model
this signal is assigned to a particular final state that is invisible in direct
photoelectron spectroscopy but in ResPES revealed through relative resonant
enhancement. A detailed analysis of the spectroscopic signature of the CT state
shows characteristics of electronic interaction not found in other electron
spectroscopic techniques. Our study demonstrates the sensitivity of ResPES to
such interactions and constitutes a new way to investigate CT at molecule-metal
interfaces.


title:
Magnetic conveyor belt transport of ultracold atoms to a superconducting
  atomchip

abstract:
  We report the realization of a robust magnetic transport scheme to bring
3x10^8 ultracold 87Rb atoms into a cryostat. The sequence starts with standard
laser cooling and trapping of 87Rb atoms, transporting first horizontally and
then vertically through the radiation shields into a cryostat by a series of
normal- and superconducting magnetic coils. Loading the atoms in a
superconducting microtrap paves the way for studying the interaction of
ultracold atoms with superconducting surfaces and quantum devices requiring
cryogenic temperatures.


title: Instability of the extreme Kerr-Newman black-holes

abstract:
  Using black-hole inequalities and the increase of the horizon's areas, we
show that there are arbitrarily small electro-vacuum perturbations of the
standard initial data of the extreme Reissner-Nordstrom black-hole that, (by
contradiction), cannot decay in time into any extreme Kerr-Newman black-hole.
This proves the expectation that the family of extreme Kerr-Newman black-holes
is unstable. It remains of course to be seen whether the whole family of
charged black-holes, including those extremes, is stable or not.


title:
Multiple Closed-Form Local Metric Learning for K-Nearest Neighbor
  Classifier

abstract:
  Many researches have been devoted to learn a Mahalanobis distance metric,
which can effectively improve the performance of kNN classification. Most
approaches are iterative and computational expensive and linear rigidity still
critically limits metric learning algorithm to perform better. We proposed a
computational economical framework to learn multiple metrics in closed-form.


title: Fingerprinting Codes and the Price of Approximate Differential Privacy

abstract:
  We show new lower bounds on the sample complexity of $(\varepsilon,
\delta)$-differentially private algorithms that accurately answer large sets of
counting queries. A counting query on a database $D \in (\{0,1\}^d)^n$ has the
form "What fraction of the individual records in the database satisfy the
property $q$?" We show that in order to answer an arbitrary set $\mathcal{Q}$
of $\gg nd$ counting queries on $D$ to within error $\pm \alpha$ it is
necessary that $$ n \geq \tilde{\Omega}\Bigg(\frac{\sqrt{d} \log
|\mathcal{Q}|}{\alpha^2 \varepsilon} \Bigg). $$ This bound is optimal up to
poly-logarithmic factors, as demonstrated by the Private Multiplicative Weights
algorithm (Hardt and Rothblum, FOCS'10). In particular, our lower bound is the
first to show that the sample complexity required for accuracy and
$(\varepsilon, \delta)$-differential privacy is asymptotically larger than what
is required merely for accuracy, which is $O(\log |\mathcal{Q}| / \alpha^2)$.
In addition, we show that our lower bound holds for the specific case of
$k$-way marginal queries (where $|\mathcal{Q}| = 2^k \binom{d}{k}$) when
$\alpha$ is not too small compared to $d$ (e.g. when $\alpha$ is any fixed
constant).
  Our results rely on the existence of short \emph{fingerprinting codes} (Boneh
and Shaw, CRYPTO'95, Tardos, STOC'03), which we show are closely connected to
the sample complexity of differentially private data release. We also give a
new method for combining certain types of sample complexity lower bounds into
stronger lower bounds.


title: Transport coefficients from the Nambu-Jona-Lasinio model for $SU(3)_f$

abstract:
  We calculate the shear $\eta(T)$ and bulk viscosities $\zeta(T)$ as well as
the electric conductivity $\sigma_e(T)$ and heat conductivity $\kappa(T)$
within the Nambu-Jona-Lasinio model for 3 flavors as a function of temperature
as well as the entropy density $s(T)$, pressure $P(T)$ and speed of sound
squared $c_s^2(T)$. We compare the results with other models such as the
Polyakov-Nambu-Jona-Lasinio (PNJL) model and the dynamical quasiparticle model
(DQPM) and confront these results with lattice QCD data whenever available. We
find the NJL model to have a limited predictive power for the thermodynamic
variables and various transport coefficients above the critical temperature
whereas the PNJL model and DQPM show acceptable results for the quantities of
interest.


title: Thermodynamics of SU(2) quantum Yang-Mills theory and CMB anomalies

abstract:
  A brief review of effective SU(2) Yang-Mills thermodynamics in the
deconfining phase is given, including the construction of the thermal
ground-state estimate in terms of an inert, adjoint scalar field $\phi$, based
on non-propagating (anti)selfdual field configurations of topological charge
unity. We explain why the screening physics of an SU(2) photon is subject to an
electric-magnetically dual interpretation. Next, we elucidate how a
low-frequency excess of line temperature in the Cosmic Microwave Background
(CMB) determines the value of the critical temperature of the
deconfining-preconfining phase transition of an SU(2) Yang-Mills theory
postulated to describe photon propagation, and we describe how, starting at a
redshift of about unity, SU(2) photons collectively work 3D temperature
depressions into the CMB. Upon projection along a line of sight, a given
depression influences the present CMB sky in a cosmologically local way,
possibly explaining the large-angle anomalies confirmed recently by the Planck
collaboration. Finally, six relativistic polarisations residing in the SU(2)
vector modes roughly match the number of degrees of freedom in cosmic neutrinos
(Planck) which would disqualify the latter as radiation. Indeed, if interpreted
as single center-vortex loops in confining phases of SU(2) Yang-Mills theories
neutrino mass $m_\nu$ solely arises by interactions with an environment.
Cosmologically, the CMB represents this environment, and thus one would expect
that $m_\nu=\xi T$ where $\xi=O(1)$. In this model cosmic neutrinos are a small
dark-matter contribution, conserved only together with the CMB fluid,
influencing Baryonic Acoustic Oscillations during CMB decoupling.


title: Complexity classification of local Hamiltonian problems

abstract:
  The calculation of ground-state energies of physical systems can be
formalised as the k-local Hamiltonian problem, which is the natural quantum
analogue of classical constraint satisfaction problems. One way of making the
problem more physically meaningful is to restrict the Hamiltonian in question
by picking its terms from a fixed set S. Examples of such special cases are the
Heisenberg and Ising models from condensed-matter physics.
  In this work we characterise the complexity of this problem for all 2-local
qubit Hamiltonians. Depending on the subset S, the problem falls into one of
the following categories: in P; NP-complete; polynomial-time equivalent to the
Ising model with transverse magnetic fields; or QMA-complete. The third of
these classes has been shown to be StoqMA-complete by Bravyi and Hastings. The
characterisation holds even if S does not contain any 1-local terms; for
example, we prove for the first time QMA-completeness of the Heisenberg and XY
interactions in this setting. If S is assumed to contain all 1-local terms,
which is the setting considered by previous work, we have a characterisation
that goes beyond 2-local interactions: for any constant k, all k-local qubit
Hamiltonians whose terms are picked from a fixed set S correspond to problems
either in P; polynomial-time equivalent to the Ising model with transverse
magnetic fields; or QMA-complete.
  These results are a quantum analogue of Schaefer's dichotomy theorem for
boolean constraint satisfaction problems.


title: Boundary estimates for the Ricci flow

abstract:
  In this paper we consider the Ricci flow on manifolds with boundary with
appropriate control on its mean curvature and conformal class. We obtain higher
order estimates for the curvature and second fundamental form near the
boundary, similar to Shi's local derivative estimates. As an application, we
prove a version of Hamilton's compactness theorem in which the limit has
boundary.
  Finally, we show that in dimension three the second fundamental form of the
boundary and its derivatives are a priori controlled in terms of the ambient
curvature and some non-collapsing assumptions. In particular, the flow exists
as long as the curvature remains bounded, in contrast to the general case where
control on the second fundamental form is also required.


title:
The growth of galactic bulges through mergers in LCDM haloes revisited.
  II. Morphological mix evolution

abstract:
  The mass aggregation and merger histories of present-day distinct haloes
selected from the cosmological Millennium Simulations I and II are mapped into
stellar mass aggregation and galaxy merger histories of central galaxies by
using empirical stellar-to-halo and stellar-to-gas mass relations. The growth
of bulges driven by the galaxy mergers/interactions is calculated using
dynamical prescriptions. The predicted bulge demographics at redshift z~0 is
consistent with observations (Zavala+2012). Here we present the evolution of
the morphological mix (traced by the bulge-to-total mass ratio, B/T) as a
function of mass up to z=3. This mix remains qualitatively the same up to z~1:
B/T<0.1 galaxies dominate at low masses, 0.1<B/T<0.45 at intermediate masses,
and B/T>0.45 at large masses. At z>1, the fractions of disc-dominated and
bulgeless galaxies increase strongly, and by z~2 the era of pure disc galaxies
is reached. Bulge-dominated galaxies acquire such a morphology, and most of
their mass, following a downsizing trend. Since our results are consistent with
most of the recent observational studies of the morphological mix at different
redshifts, a LCDM-based scenario of merger-driven bulge assembly does not seem
to face critical issues. However, if the stellar-to-halo mass relation changes
too little with redshift, then some tensions with observations appear.


title: Twisted Spin cobordism and positive scalar curvature

abstract:
  We show how a suitably twisted Spin-cobordism spectrum connects to the
question of existence of metrics of positive scalar curvature on closed, smooth
manifolds by building on fundamental work of Gromov, Lawson, Rosenberg, Stolz
and others. We then investigate this parametrised spectrum, compute its
$mod~2$-cohomology and generalise the Anderson-Brown-Peterson splitting of the
regular Spin-cobordism spectrum to the twisted case. Along the way we also
describe the $mod~2$-cohomology of various twisted, connective covers of real
K-theory.


title: Precision Spectroscopy of Polarized Molecules in an Ion Trap

abstract:
  Polar molecules are desirable systems for quantum simulations and cold
chemistry. Molecular ions are easily trapped, but a bias electric field applied
to polarize them tends to accelerate them out of the trap. We present a general
solution to this issue by rotating the bias field slowly enough for the
molecular polarization axis to follow but rapidly enough for the ions to stay
trapped. We demonstrate Ramsey spectroscopy between Stark-Zeeman sublevels in
180Hf19F+ with a coherence time of 100 ms. Frequency shifts arising from
well-controlled topological (Berry) phases are used to determine magnetic
g-factors. The rotating-bias-field technique may enable using trapped polar
molecules for precision measurement and quantum information science, including
the search for an electron electric dipole moment.


title: Motivic complexes and special values of zeta functions

abstract:
  Beginning with the conjecture of Artin and Tate in 1966, there has been a
series of successively more general conjectures expressing the special values
of the zeta function of an algebraic variety over a finite field in terms of
other invariants of the variety. In this article, we present the ultimate such
conjecture, and provide evidence for it. In particular, we enhance Voevodsky's
Z[1/p]-category of etale motivic complexes with a p-integral structure, and
show that, for this category, our conjecture follows from the Tate and
Beilinson conjectures. As the conjecture is stated in terms of motivic
complexes, it (potentially) applies also to algebraic stacks, log varieties,
simplicial varieties, etc..


title: The Nahm Pole Boundary Condition

abstract:
  The Nahm pole boundary condition for certain gauge theory equations in four
and five dimensions is defined by requiring that a solution should have a
specified singularity along the boundary. In the present paper, we show that
this boundary condition is elliptic and has regularity properties analogous to
more standard elliptic boundary conditions. We also establish a uniqueness
theorem for the solution of the relevant equations on a half-space with Nahm
pole boundary conditions. These results are expected to have a generalization
involving knots, with applications to the Jones polynomial and Khovanov
homology.


title: The Foundations of Mathematics in the Physical Reality

abstract:
  In this article we present an axiomatic definition of sets with individuals
and a definition of natural numbers and ordinals. We use the axioms pairs,
union, regularity and separation. We define the equality of sets and of
individuals. There is no empty set. A single shoe is not a singleton set but an
individual, a pair of shoes is a set. We call limit ordinals first numbers,
that is a first number of the Peano axioms. An axiom of infinity is postulated
and we prove the Peano axioms for ordinals with a first number up to a first
$\omega^\omega$-number. Then we prove a first $\omega^\omega$-number notequal
$0$ belonging to ordinal $\gamma$ is an impassable barrier for counting down
$\gamma$ to $0$ in a finite number of steps.


title: Special Jordan subspaces in Coupled Cell Networks

abstract:
  Given a regular network (in which all cells have the same type and receive
the same number of inputs and all arrows have the same type), we define the
special Jordan subspaces to that network and we use these subspaces to study
the synchrony phenomenon in the theory of coupled cell networks. To be more
precise, we prove that the synchrony subspaces of a regular network are
precisely the polydiagonals that are direct sums of special Jordan subspaces.
We also show that special Jordan subspaces play a special role in the lattice
structure of all synchrony subspace because every join-irreducible element of
the lattice is the smallest synchrony subspace containing some special Jordan
subspace.


title: The Dynkin index and sl(2)-subalgebras of simple Lie algebras

abstract:
  This is a continuation of arXiv:0903.0398 [math.RT]. Let g be a simple Lie
algebra. In this note, we provide simple formulae for the index of
sl(2)-subalgebras in the classical Lie algebras and a new formula for the index
of the principal sl(2). We also compute the difference, D, of the indices of
principal and subregular sl(2)-subalgebras. Our formula for D involves some
data related to the McKay correspondence for g. Using the index of
sl(2)-subalgebras of classical Lie algebras, we also obtain three series of
interesting combinatorial identities parameterised by partitions.


title: Local reductions

abstract:
  We reduce non-deterministic time $T \ge 2^n$ to a 3SAT instance $\phi$ of
quasilinear size $|\phi| = T \cdot \log^{O(1)} T$ such that there is an
explicit circuit $C$ that on input an index $i$ of $\log |\phi|$ bits outputs
the $i$th clause, and each output bit of $C$ depends on $O(1)$ input bits. The
previous best result was $C$ in NC$^1$. Even in the simpler setting of
polynomial size $|\phi| = \poly(T)$ the previous best result was $C$ in AC$^0$.
  More generally, for any time $T \ge n$ and parameter $r \leq n$ we obtain
$\log_2 |\phi| = \max(\log T, n/r) + O(\log n) + O(\log\log T)$ and each output
bit of $C$ is a decision tree of depth $O(\log r)$.
  As an application, we tighten Williams' connection between satisfiability
algorithms and circuit lower bounds (STOC 2010; SIAM J. Comput. 2013).


title: The principles of humanism for MANETs

abstract:
  The proposed humanistic approach mapped the human character and behavior into
a device to evade the bondages of implementation and surely succeed as we live.
Human societies are the complex and most organized networks, in which many
communities having different cultural livelihood. The formation of communities
within a society and the way of associations can be mapped to MANET. In this
work we have presented the principles of humanism for MANETs. The proposed
approach is not only robust and secure but it certainly meets the existing
challenges (such as name resolution, address allocation and authentication).
Its object oriented design defines a service in terms of Arts, Culture, and
Machine. An 'Art' is the smallest unit of work (defined as an interface), the
'Culture' is the integration and implementation of one or more Arts (defined as
a class) and finally the 'Machine' which is an instance of a Culture that
defines a running service. The grouping of all communicable Machines having the
same Culture forms a 'Community'. We have used the term 'Society' for a MANET
having one or more communities and modeled using the humanistic approach. The
proposed approach is compared with GloMoSim and the implementation of file
transfer service is presented using the said approach. Our approach is better
in terms of implementation of the basic services, security, reliability,
throughput, extensibility, scalability etc.


title: Generalization of N-Ideals Of BE-algebras

abstract:
  In this paper, using N-structure, the notion of an N-ideal in a BE-algebra is
introduced. Conditions for an N-structure to be an N-ideal are provided. To
obtain a more general form of an N-ideal, a point N-structure which is (k
conditionally) employed in an N-structure is proposed. Using these notions, the
concept of an N-ideal is introduced and related properties are investigated.
N-ideal is a generalized form of N-ideal. Characterizations of N-ideals are
discussed.


title:
Looking at the gluon moment of the nucleon with dynamical twisted mass
  fermions

abstract:
  To understand the structure of hadrons it is important to know the PDF of
their constituents, the quarks and gluons. In our work we aim to compute the
first moment of the gluon PDF $\langle x \rangle_g$ for the nucleon. We follow
two possible approaches in order to extract the gluon moment: the
Feynman-Hellmann theorem and a direct method with smearing of the gluon
operator. We present preliminary results computed on $24^3 \times 48$ lattices
for the case where the Feynman-Hellman theorem is used and $32^3 \times 64$
lattices for the direct method, employing $N_f=2+1+1$ maximally twisted mass
fermions.


title:
Architecture of an Ontology-Based Domain-Specific Natural Language
  Question Answering System

abstract:
  Question answering (QA) system aims at retrieving precise information from a
large collection of documents against a query. This paper describes the
architecture of a Natural Language Question Answering (NLQA) system for a
specific domain based on the ontological information, a step towards semantic
web question answering. The proposed architecture defines four basic modules
suitable for enhancing current QA capabilities with the ability of processing
complex questions. The first module was the question processing, which analyses
and classifies the question and also reformulates the user query. The second
module allows the process of retrieving the relevant documents. The next module
processes the retrieved documents, and the last module performs the extraction
and generation of a response. Natural language processing techniques are used
for processing the question and documents and also for answer extraction.
Ontology and domain knowledge are used for reformulating queries and
identifying the relations. The aim of the system is to generate short and
specific answer to the question that is asked in the natural language in a
specific domain. We have achieved 94 % accuracy of natural language question
answering in our implementation.


title: Density Functional Theory Study Of Hypothetical PbTiO3-Based Oxysulfides

abstract:
  Using density functional theory (DFT) within the local density approximation
(LDA), we calculate the physical and electronic properties of PbTiO3 (PTO) and
a series of hypothetical compounds PbTiO3-xSx x = 0.2, 0.25, 0.33, 0.5, 1, 2,
and 3 arranged in the corner-sharing cubic perovskite structure. We determine
that replacing the apical oxygen atom in the PTO tetragonal unit cell with a
sulfur atom reduces the x = 0 LDA calculated band gap of 1.47 eV to 0.43 - 0.67
eV for x = 0.2 - 1 and increases the polarization. PBE0 and GW methods predict
that the hypothetical compositions x = 0.2 to x = 2 will have band gaps in the
visible range. For all values of x < 2, the oxysulfide perovskite retains the
tetragonal phase of PbTiO3, and the a-lattice parameter remains within 2.5% of
the oxide. Thermodynamic analysis indicates that chemical routes using high
temperature gas, such as H2S and CS2, can be used to substitute O for S in PTO
for the compositions x = 0.2 - 0.5.


title:
Optimal Hardy-Littlewood type inequalities for polynomials and
  multilinear operators

abstract:
  In this paper we obtain quite general and definitive forms for
Hardy-Littlewood type inequalities. Moreover, when restricted to the original
particular cases, our approach provides much simpler and straightforward proofs
and we are able to show that in most cases the exponents involved are optimal.
The technique we used is a combination of probabilistic tools and of an
interpolative approach; this former technique is also employed in this paper to
improve the constants for vector-valued Bohnenblust--Hille type inequalities.


title: Inverse magnetic catalysis in QCD

abstract:
  We propose a physical mechanism for inverse magnetic catalysis, the
suppression of the chiral condensate by an external magnetic field in QCD
around the critical temperature. We show that this effect, seen in lattice
simulations, is a result of how the sea quarks react to the magnetic field. We
find that the suppression of the condensate happens because the quark
determinant can suppress low quark modes by ordering the Polyakov loop. This
mechanism is particularly efficient around $T_c$ where the Polyakov loop
effective potential is flat and the determinant can have a significant ordering
effect. Our picture suggests that for the description of QCD in large magnetic
fields it is crucial to properly capture the interaction between the Polyakov
loop and the sea quarks, both in low-energy effective models and on the
lattice.


title: FKN Theorem on the biased cube

abstract:
  In this note we consider Boolean functions defined on the discrete cube
equipped with a biased product probability measure. We prove that if the
spectrum of such a function is concentrated on the first two Fourier levels,
then the function is close to a certain function of one variable. Moreover, in
the symmetric case we prove that if a [-1,1]-valued function defined on the
discrete cube is close to a certain affine function, then it is also close to a
[-1,1]-valued affine function.


title:
Recent progresses on the pseudospin symmetry in single particle resonant
  states

abstract:
  The pseudospin symmetry (PSS) is a relativistic dynamical symmetry directly
connected with the small component of the nucleon Dirac wave function. Much
effort has been made to study this symmetry in bound states. Recently, a
rigorous justification of the PSS in single particle resonant states was
achieved by examining the asymptotic behaviors of the radial Dirac wave
functions: The PSS in single particle resonant states in nuclei is conserved
exactly when the attractive scalar and repulsive vector potentials have the
same magnitude but opposite sign. Several issues related to the exact
conservation and breaking mechanism of the PSS in single particle resonances
were investigated by employing spherical square well potentials in which the
PSS breaking part can be well isolated in the Jost function. A threshold effect
in the energy splitting and an anomaly in the width splitting of pseudospin
partners were found when the depth of the square well potential varies from
zero to a finite value.


title:
Comparative Study of Various VOIP Applications in 802.11a Wireless
  Network Scenario

abstract:
  Today, Voice over Wireless Local Area Network (VOWLAN) is the most accepted
Internet application. There are a large number of literatures regarding the
performance of various WLAN networks. Most of them focus on simulations and
modeling, but there are also some experiments with real networks. This paper
explains the comparison of performance of two different VOIP (Voice over
Internet Protocol) applications over the same IEEE 802.11a wireless network.
Radio link standard 802.11a have maximum transmission rate of 54Mbps. First
protocol is session initiation protocol (SIP) and second is H.323 protocol.
First one has an agent called SIP proxy. Second have a gateway reflects the
characteristics of a Switched Circuit Network (SCN). With this comparison we
have required to obtain a better understanding of wireless network suitability
for voice communication in IP network.


title:
On the neighborhood of an inhomogeneous stable stationary solution of
  the Vlasov equation - Case of the Hamiltonian mean-field model

abstract:
  We consider the one-dimensional Vlasov equation with an attractive cosine
potential, and its non homogeneous stationary states that are decreasing
functions of the energy. We show that in the Sobolev space $W^{1,p}$ ($p>2$)
neighborhood of such a state, all stationary states that are decreasing
functions of the energy are stable. This is in sharp contrast with the
situation for homogeneous stationary states of a Vlasov equation, where a
control over strictly more than one derivative is needed to ensure the absence
of unstable stationary states in a neighborhood of a reference stationary state
[Z.Lin and C.Zeng, Comm.Math.Phys. {\bf 306}, 291-331 (2011)].


title: On the Bayesian approach to neutrino mass ordering

abstract:
  We study the framework of Bayesian statistics for analyzing the capabilities
and results of future experiments looking to solve the issue of the neutrino
mass ordering. Starting from the general scenario, we then give examples of the
procedure for experiments with Gaussian and non-Gaussian distributions for the
indicator. We describe in detail what can and cannot be said about the neutrino
mass ordering and a future experiment's capabilities to determine it. Finally,
we briefly comment on the application to other binary measurements, such as the
determination of the octant of $\theta_{23}$.


title:
Comparative Study of QOS Parameters of SIP protocol in 802.11a and
  802.11b Network

abstract:
  Present day, the internet telephony growth is much faster than previous. Now
we are familiar with digitized packet of voice stream. So, we have required
VOIP communication. SIP is one type of VOIP protocol. This one has a SIP proxy.
There have one of the important communication environment Wireless LAN (WLAN).
WLAN have different radio link standard. Here I am comparing SIP protocol in
two radio link standard 802.11a and 802.11b environment. The first one have
maximum transmission rate of 54Mbps and second one have maximum transmission
rate of 11Mbps. In this paper I want to show the results in a comparative plot.
These comparisons include server /client throughput, packet drops, end to end
delay etc.


title: Accumulation of motile elongated micro-organisms in turbulence

abstract:
  We study the effect of turbulence on marine life by performing numerical
simulations of motile microorganisms, modelled as prolate spheroids, in
isotropic homogeneous turbulence. We show that the clustering and patchiness
observed in laminar flows, linear shear and vortex flows, are significantly
reduced in a three-dimensional turbulent flow mainly because of the complex
topology; elongated micro-orgamisms show some level of clustering in the case
of swimmers without any preferential alignment whereas spherical swimmers
remain uniformly distributed. Micro-organisms with one preferential swimming
direction (e.g. gyrotaxis) still show significant clustering if spherical in
shape, whereas prolate swimmers remain more uniformly distributed. Due to their
large sensitivity to the local shear, these elongated swimmers react slower to
the action of vorticity and gravity and therefore do not have time to
accumulate in a turbulent flow. These results show how purely hydrodynamic
effects can alter the ecology of microorganisms that can vary their shape and
their preferential orientation.


title: Computational Assignment of Chemical Shifts for Protein Residues

abstract:
  Fast and accurate protein structure prediction is one of the major challenges
in structural biology, biotechnology and molecular biomedicine. These fields
require 3D protein structures for rational design of proteins with improved or
novel properties. X-ray crystallography is the most common approach even with
its low success rate, but lately NMR based approaches have gained popularity.
The general approach involves a set of distance restraints used to guide a
structure prediction, but simple NMR triple-resonance experiments often provide
enough structural information to predict the structure of small proteins.
Previous protein folding simulations that have utilised experimental data have
weighted the experimental data and physical force field terms more or less
arbitrarily, and the method is thus not generally applicable to new proteins.
Furthermore a complete and near error-free assignment of chemical shifts
obtained by the NMR experiments is needed, due to the static, or deterministic,
assignment. In this thesis I present Chemshift, a module for handling chemical
shift assignments, implemented in the protein structure determination program
Phaistos. This module treats both the assignment of experimental data, as well
as the weighing compared to physical terms, in a probabilistic framework where
no data is discarded. Provided a partial assignment of NMR peaks, the module is
able to improve the assignment with the intension to utilise this in the
protein folding with little bias.


title:
H.E.S.S. Observations of the Crab during its March 2013 GeV Gamma-Ray
  Flare

abstract:
  Context. On March 4, 2013, the Fermi-LAT and AGILE reported a flare from the
direction of the Crab Nebula in which the high-energy (HE; E > 100 MeV) flux
was six times above its quiescent level. Simultaneous observations in other
energy bands give us hints about the emission processes during the flare
episode and the physics of pulsar wind nebulae in general. Aims. We search for
variability of the emission of the Crab Nebula at very-high energies (VHE; E >
100 GeV), using contemporaneous data taken with the H.E.S.S. array of Cherenkov
telescopes. Methods. Observational data taken with the H.E.S.S. instrument on
five consecutive days during the flare were analysed concerning the flux and
spectral shape of the emission from the Crab Nebula. Night-wise light curves
are presented with energy thresholds of 1 TeV and 5 TeV. Results. The
observations conducted with H.E.S.S. on 2013 March 6 to March 10 show no
significant changes in the flux. They limit the variation on the integral flux
above 1 TeV to less than 63% and the integral flux above 5 TeV to less than 78%
at a 95% confidence level.


title: Differential cohomology theories as sheaves of spectra

abstract:
  We show that every sheaf on the site of smooth manifolds with values in a
stable (infinity,1)-category (like spectra or chain complexes) gives rise to a
differential cohomology diagram and a homotopy formula, which are common
features of all classical examples of differential cohomology theories. These
structures are naturally derived from a canonical decomposition of a sheaf into
a homotopy invariant part and a piece which has a trivial evaluation on a
point. In the classical examples the latter is the contribution of differential
forms. This decomposition suggest a natural scheme to analyse new sheaves by
determining these pieces and the gluing data. We perform this analysis for a
variety of classical and not so classical examples.


title: Stabilization of Linear Higher Derivative Gravity with Constraints

abstract:
  We show that the instabilities of higher derivative gravity models with
quadratic curvature invariant $\alpha R^2+\beta R_{\mu\nu}R^{\mu\nu}$ can be
removed by judicious addition of constraints at the quadratic level of metric
fluctuations around Minkowski/de Sitter background. With a suitable parameter
choice, we find that the instabilities of helicity-0, 1, 2 modes can be removed
while reducing the dimensionality of the original phase space. To retain the
renormalization properties of higher derivative gravity, Lorentz symmetry in
the constrained theory is explicitly broken.


title: On the exact Berk-Jones statistics and their p-value calculation

abstract:
  Continuous goodness-of-fit testing is a classical problem in statistics.
Despite having low power for detecting deviations at the tail of a
distribution, the most popular test is based on the Kolmogorov-Smirnov
statistic. While similar variance-weighted statistics, such as Anderson-Darling
and the Higher Criticism statistic give more weight to tail deviations, as
shown in various works, they still mishandle the extreme tails.
  As a viable alternative, in this paper we study some of the statistical
properties of the exact $M_n$ statistics of Berk and Jones. We derive the
asymptotic null distributions of $M_n, M_n^+, M_n^-$, and further prove their
consistency as well as asymptotic optimality for a wide range of rare-weak
mixture models. Additionally, we present a new computationally efficient method
to calculate $p$-values for any supremum-based one-sided statistic, including
the one-sided $M_n^+,M_n^-$ and $R_n^+,R_n^-$ statistics of Berk and Jones and
the Higher Criticism statistic. We illustrate our theoretical analysis with
several finite-sample simulations.


title:
Fano Resonances in the Infrared Spectra of Phonons in Hyper-Kagome
  Na_3Ir_3O_8

abstract:
  We report the complex dielectric function of high-quality Na_3Ir_3O_8 single
crystals determined by spectroscopic ellipsometry in the spectral range from 15
meV to 2 eV. The far-infrared phonon spectra exhibit highly asymmetric line
shapes characteristic of Fano resonances. With decreasing temperature, we
observe a sharp increase of the infrared intensity of the Fano-shaped phonon
modes accompanied by concomitant changes in the low energy electronic
background, formed by electronic transitions between Ir 5d t_2g bands of a
mostly J_eff = 1/2 character. The role of the complex Hyper-Kagome lattice
structure and strong spin-orbit coupling is considered.


title:
Localizing Grasp Affordances in 3-D Points Clouds Using Taubin Quadric
  Fitting

abstract:
  Perception-for-grasping is a challenging problem in robotics. Inexpensive
range sensors such as the Microsoft Kinect provide sensing capabilities that
have given new life to the effort of developing robust and accurate perception
methods for robot grasping. This paper proposes a new approach to localizing
enveloping grasp affordances in 3-D point clouds efficiently. The approach is
based on modeling enveloping grasp affordances as a cylindrical shells that
corresponds to the geometry of the robot hand. A fast and accurate fitting
method for quadratic surfaces is the core of our approach. An evaluation on a
set of cluttered environments shows high precision and recall statistics. Our
results also show that the approach compares favorably with some alternatives,
and that it is efficient enough to be employed for robot grasping in real-time.


title: On multiple Borsuk numbers in normed spaces

abstract:
  Hujter and L\'angi introduced the $k$-fold Borsuk number of a set $S$ in
Euclidean $n$-space of diameter $d > 0$ as the smallest cardinality of a family
$\mathcal F$ of subsets of $S$, of diameters strictly less than $d$, such that
every point of $S$ belongs to at least $k$ members of $\mathcal F$.
  We investigate whether a $k$-fold Borsuk covering of a set $S$ in a finite
dimensional real normed space can be extended to a completion of $S$.
Furthermore, we determine the $k$-fold Borsuk number of sets in not angled
normed planes, and give a partial characterization for sets in angled planes.


title:
Dramatic Enhancement of Third-Harmonic Generation in Plasmonic
  Nanostructures via Nonlocal Effects

abstract:
  Classical nonlocality in conducting nanostructures has been shown to
dramatically alter the linear optical response, by placing a fundamental limit
on the maximum field enhancement that can be achieved. This limit directly
extends to all nonlinear processes, which depend on field amplitudes. A study
of third-harmonic generation in metal film-coupled nanowires reveals that for
sub-nanometer vacuum gaps the nonlocality enhances the effective nonlinearity
by four orders of magnitude as the field penetrates deeper inside the metal
than that predicted assuming a purely local electronic response.


title: Proceedings 1st Workshop on Advances in Systems of Systems

abstract:
  This volume contains the proceedings of the first workshop on Advances in
Systems of Systems (AISOS'13), held in Roma, Italy, March 16. System-of-Systems
describes the large scale integration of many independent self-contained
systems to satisfy global needs or multi-system requests. Examples are smart
grid, intelligent buildings, smart cities, transport systems, etc. There is a
need for new modeling formalisms, analysis methods and tools to help make
trade-off decisions during design and evolution avoiding leading to sub-optimal
design and rework during integration and in service. The workshop should focus
on the modeling and analysis of System of Systems. AISOS'13 aims to gather
people from different communities in order to encourage exchange of methods and
views.


title: An action for reaction in general dimension

abstract:
  We present an effective field theory study of radiation and radiation
reaction effects for scalar and electromagnetic fields in general spacetime
dimensions. Our method unifies the treatment of outgoing radiation and its
reaction force within a single action principle. Central ingredients are the
field doubling method, which is the classical version of the closed time path
formalism and allows a treatment of non-conservative effects within an action,
action level matching of system and radiation zones, and the use of fields
which are adapted to the enhanced symmetries of each zone. New results include
compact expressions for radiative multipoles, radiation, and radiation reaction
effective action in any spacetime dimension. We emphasize dimension-dependent
features such as the difference between electric and magnetic multipoles in
higher dimensions and the temporal non-locality nature of the effective action
for odd spacetime dimensions, which is a reflection of indirect propagation
("tail effect") in the full theory. This work generalizes the method and
results developed for 4 dimensions in [arXiv:1305.6930], and prepares the way
for a treatment of the gravitational case.


title: Surface critical exponents at a discontinuous bulk transition

abstract:
  Systems with a bulk first-order transition can display diverging correlation
lengths close to a surface. This surface induced disordering yields a special
type of surface criticality. Using extensive numerical simulations we study
surface quantities in the two-dimensional Potts model with a large number of
states $q$ which undergoes a discontinuous bulk transition. The surface
critical exponents are thereby found to depend on the value of $q$, which is in
contrast to prior claims that these exponents should be universal and
independent of $q$. It follows that surface induced disordering at first-order
transitions is characterized by exponents that depend on the details of the
model.


title: Sound, Complete and Minimal UCQ-Rewriting for Existential Rules

abstract:
  We address the issue of Ontology-Based Data Access, with ontologies
represented in the framework of existential rules, also known as Datalog+/-. A
well-known approach involves rewriting the query using ontological knowledge.
We focus here on the basic rewriting technique which consists of rewriting the
initial query into a union of conjunctive queries. First, we study a generic
breadth-first rewriting algorithm, which takes as input any rewriting operator,
and define properties of rewriting operators that ensure the correctness of the
algorithm. Then, we focus on piece-unifiers, which provide a rewriting operator
with the desired properties. Finally, we propose an implementation of this
framework and report some experiments.


title:
Invariant quadrics and orbits for a family of rational systems of
  difference equations

abstract:
  We study the existence of invariant quadrics for a class of systems of
difference equations in ${\mathbb R}^n$ defined by linear fractionals sharing
denominator. Such systems can be described in terms of some square matrix $A$
and we prove that there is a correspondence between non-degenerate invariant
quadrics and solutions to a certain matrix equation involving $A$. We show that
if $A$ is semisimple and the corresponding system admits non-degenerate
quadrics, then every orbit of the dynamical system is contained either in an
invariant affine variety or in an invariant quadric.


title: Are Lock-Free Concurrent Algorithms Practically Wait-Free?

abstract:
  Lock-free concurrent algorithms guarantee that some concurrent operation will
always make progress in a finite number of steps. Yet programmers prefer to
treat concurrent code as if it were wait-free, guaranteeing that all operations
always make progress. Unfortunately, designing wait-free algorithms is
generally a very complex task, and the resulting algorithms are not always
efficient. While obtaining efficient wait-free algorithms has been a long-time
goal for the theory community, most non-blocking commercial code is only
lock-free.
  This paper suggests a simple solution to this problem. We show that, for a
large class of lock- free algorithms, under scheduling conditions which
approximate those found in commercial hardware architectures, lock-free
algorithms behave as if they are wait-free. In other words, programmers can
keep on designing simple lock-free algorithms instead of complex wait-free
ones, and in practice, they will get wait-free progress.
  Our main contribution is a new way of analyzing a general class of lock-free
algorithms under a stochastic scheduler. Our analysis relates the individual
performance of processes with the global performance of the system using Markov
chain lifting between a complex per-process chain and a simpler system progress
chain. We show that lock-free algorithms are not only wait-free with
probability 1, but that in fact a general subset of lock-free algorithms can be
closely bounded in terms of the average number of steps required until an
operation completes.
  To the best of our knowledge, this is the first attempt to analyze progress
conditions, typically stated in relation to a worst case adversary, in a
stochastic model capturing their expected asymptotic behavior.


title:
Spatially resolved physical and chemical properties of the planetary
  nebula NGC 3242

abstract:
  Optical integral-field spectroscopy was used to investigate the planetary
nebula NGC 3242. We analysed the main morphological components of this source,
including its knots, but not the halo. In addition to revealing the properties
ofthe physical and chemical nature of this nebula, we also provided reliable
spatially resolved constraints that can be used for future photoionisation
modelling of the nebula. The latter is ultimately necessary to obtain a fully
self-consistent 3D picture of the physical and chemical properties of the
object. The observations were obtained with the VIMOS instrument attached to
VLT-UT3. Maps and values for specific morphological zones for the detected
emission-lines were obtained and analysed with routines developed by the
authors to derive physical and chemical conditions of the ionised gas in a 2D
fashion. We obtained spatially resolved maps and mean values of the electron
densities, temperatures, and chemical abundances, for specific morphological
structures in NGC 3242. These results show the pixel-to-pixel variations of the
the small- and large-scale structures of the source. These diagnostic maps
provide information free from the biases introduced by traditional single
long-slit observations. In general, our results are consistent with a uniform
abundance distribution for the object, whether we look at abundance maps or
integrated fluxes from specified morphological structures. The results indicate
that special care should be taken with the calibration of the data and that
only data with extremely good signal-to-noise ratio and spectral coverage
should be used to ensure the detection of possible spatial variations.


title: Insulating State of a Quasi-1-Dimensional Superconductor

abstract:
  The topic of quantum fluctuations in quasi-1D superconductors, also called
quantum phase slips (QPS), has attracted a significant attention. It has been
shown that the phenomenon is capable to suppress zero resistivity of
ultra-narrow superconducting nanowires at low temperatures T<<Tc and quench
persistent currents in tiny nanorings. It has been predicted that a
superconducting nanowire in the regime of QPS is dual to a Josephson junction.
In particular case of an extremely narrow superconducting nanowire embedded in
high-impedance environment the duality leads to an intuitively controversial
result: the superconductor enters an insulating state. Here we experimentally
demonstrate that the I-V characteristic of such a wire indeed shows Coulomb
blockade, which disappears with application of critical magnetic field and/or
above the critical temperature proving that the effect is related to
superconductivity. The system can be considered as the dynamic equivalent of a
chain of conventional Josephson junctions.


title:
Odd- and even-parity charmed mesons revisited in heavy hadron chiral
  perturbation theory

abstract:
  We study the masses of the low-lying charmed mesons within the framework of
heavy-hadron chiral perturbation theory. We work to third order in the chiral
expansion, where meson loops contribute. In contrast to previous approaches, we
use physical meson masses in evaluating these loops. This ensures that their
imaginary parts are consistent with the observed widths of the D-mesons. The
lowest odd- and even-parity, strange and nonstrange mesons provide enough
constraints to determine only certain linear combinations of the low-energy
constants in the effective Lagrangian. We comment on how lattice QCD could
provide further information to disentangle these constants.


title: Conceptional Design of Heavy Ion Linac Injector for HIRFL-CSRm

abstract:
  A room temperature heavy ion linac has been proposed as a new injector of
CSRm (the main Cooler Storage Ring) at HIRFL (Heavy Ion Research Facility in
Lanzhou), which is expected to improve the performance of HIRFL. The linac
injector can supply heavy ion with maximum mass to charge ratio of 7 and
injection kinetic energy of 7.272MeV/u for CSRm, and the pulsed beam intensity
is 3emA with the duty factor of 3%. Compared with the present cyclotron
injector SFC (Sector Focusing Cyclotron), the beam current from linac can be
improved by 10-100 times. As the pre-accelerator of the linac, the 108.48MHz
4-rod RFQ accelerates ion beam from 4keV/u to 300keV/u, which achieves the
transmission efficiency of 95.3% with 3.07m long vanes. The phase advance has
been taken into account to analysis the error tolerance, and parametric
resonance have been carefully avoided by adjusting the structure parameters.
KONUS IH-DTLs, which follow the RFQ, accelerate the ions up to the energy of
7.272MeV/u and inject into HIRFL-CSRm. The resonance frequency is 108.48MHz for
the first two cavities and 216.96MHz for the last 5 DTLs. The maximum
accelerating gradient can reach 4.95MV/m in DTL section with the length of
17.066m, and the total pulsed RF power is 2.8MW. A new strategy, for the
determination of resonance frequency, RFQ vane voltage and DTL effective
accelerating voltage, is described in detail. The beam dynamics design of the
linac will be present in this paper.


title: Reactions of a Be-10 beam on proton and deuteron targets

abstract:
  The extraction of detailed nuclear structure information from transfer
reactions requires reliable, well-normalized data as well as optical potentials
and a theoretical framework demonstrated to work well in the relevant mass and
beam energy ranges. It is rare that the theoretical ingredients can be tested
well for exotic nuclei owing to the paucity of data. The halo nucleus Be-11 has
been examined through the 10Be(d,p) reaction in inverse kinematics at
equivalent deuteron energies of 12,15,18, and 21.4 MeV. Elastic scattering of
Be-10 on protons was used to select optical potentials for the analysis of the
transfer data. Additionally, data from the elastic and inelastic scattering of
Be-10 on deuterons was used to fit optical potentials at the four measured
energies. Transfers to the two bound states and the first resonance in Be-11
were analyzed using the Finite Range ADiabatic Wave Approximation (FR-ADWA).
Consistent values of the spectroscopic factor of both the ground and first
excited states were extracted from the four measurements, with average values
of 0.71(5) and 0.62(4) respectively. The calculations for transfer to the first
resonance were found to be sensitive to the size of the energy bin used and
therefore could not be used to extract a spectroscopic factor.


title: Magneto-transport Subbands Spectroscopy in InAs Nanowires

abstract:
  We report on magneto-transport measurements in InAs nanowires under large
magnetic field (up to 55T), providing a direct spectroscopy of the 1D
electronic band structure. Large modulations of the magneto-conductance
mediated by an accurate control of the Fermi energy reveal the Landau
fragmentation, carrying the fingerprints of the confined InAs material. Our
numerical simulations of the magnetic band structure consistently support the
experimental results and reveal key parameters of the electronic confinement.


title: Binary Cepheids from optical interferometry

abstract:
  Classical Cepheid stars have been considered since more than a century as
reliable tools to estimate distances in the universe thanks to their
Period-Luminosity (P-L) relationship. Moreover, they are also powerful
astrophysical laboratories, providing fundamental clues for studying the
pulsation and evolution of intermediate-mass stars. When in binary systems, we
can investigate the age and evolution of the Cepheid, estimate the mass and
distance, and constrain theoretical models. However, most of the companions are
located too close to the Cepheid (1-40 mas) to be spatially resolved with a
10-meter class telescope. The only way to spatially resolve such systems is to
use long-baseline interferometry. Recently, we have started a unique and
long-term interferometric program that aims at detecting and characterizing
physical parameters of the Cepheid companions, with as main objectives the
determination of accurate masses and geometric distances.


title: Bottomonium spectrum at finite temperature

abstract:
  We investigate the modification of S and P wave states in the bottomonium
spectrum above and below the deconfinement crossover temperature through their
spectral functions obtained from the maximum entropy method. Anisotropic
ensembles with $N_f=2+1$ Wilson clover fermions with tadpole-improvement are
used while the bottom quark is treated with an improved non-relativistic
action. We observe significant modifications of the P wave $\chi_{b1}$ ground
state directly above the crossover temperature, $T_c$, while the S wave
$\Upsilon$ ground state remains relatively unchanged up to temperatures of
almost $2T_c$. This evidence supports earlier conclusions from our FASTSUM
collaboration of the immediate dissociation of the P wave states above $T_c$
and the survival of the S wave ground states up to $2T_c$.


title:
Analysis of a malaria model with mosquito host choice and bed-net
  control

abstract:
  A malaria model is formulated which includes the enhanced attractiveness of
infectious humans to mosquitoes, as result of host manipulation by malaria
parasite, and the human behavior, represented by insecticide-treated bed nets
usage. The occurrence of a backward bifurcation at R_0=1 is shown to be
possible, which implies that multiple endemic equilibria co-exist with a stable
disease-free equilibrium when the basic reproduction number is less than unity.
This phenomenon is found to be caused by disease-induced human mortality. The
global asymptotic stability of the endemic equilibrium for R_0>1 is proved, by
using the geometric approach to global stability. Therefore, the disease
becomes endemic for $R_0>1$ regardless of the number of initial cases in both
the human and vector populations. Finally, the impact of vector's host
preferences and bed-net usage behavior on system dynamics is investigated.


title:
Functional Renormalization Group Approach for Inhomogeneous Interacting
  Fermi-Systems

abstract:
  The functional renormalization group (fRG) approach has the property that, in
general, the flow equation for the two-particle vertex generates
$\mathcal{O}(N^4)$ independent variables, where $N$ is the number of
interacting states (e.g. sites of a real-space discretization). In order to
include the flow equation for the two-particle vertex one needs to make further
approximations if $N$ becomes too large. We present such an approximation
scheme, called the coupled-ladder approximation, for the special case of onsite
interaction. Like the generic third-order-truncated fRG, the coupled-ladder
approximation is exact to second order and is closely related to a simultaneous
treatment of the random phase approximation in all channels, i.e. summing up
parquet-type diagrams. The scheme is applied to a one-dimensional model
describing a quantum point contact.


title: Stochastic inference with deterministic spiking neurons

abstract:
  The seemingly stochastic transient dynamics of neocortical circuits observed
in vivo have been hypothesized to represent a signature of ongoing stochastic
inference. In vitro neurons, on the other hand, exhibit a highly deterministic
response to various types of stimulation. We show that an ensemble of
deterministic leaky integrate-and-fire neurons embedded in a spiking noisy
environment can attain the correct firing statistics in order to sample from a
well-defined target distribution. We provide an analytical derivation of the
activation function on the single cell level; for recurrent networks, we
examine convergence towards stationarity in computer simulations and
demonstrate sample-based Bayesian inference in a mixed graphical model. This
establishes a rigorous link between deterministic neuron models and functional
stochastic dynamics on the network level.

categories: q-bio.NC cond-mat.dis-nn cs.NE physics.bio-ph stat.ML


title: A non-autonomous SEIRS model with general incidence rate

abstract:
  For a non-autonomous SEIRS model with general incidence, that admits [T.
Kuniya and Y. Nakata, Permanence and extinction for a nonautonomous SEIRS
epidemic model, Appl. Math. Computing 218, 9321-9331 (2012)] as a very
particular case, we obtain conditions for extinction and strong persistence of
the infectives. Our conditions are computed for several particular settings and
extend the hypothesis of several proposed non-autonomous models. Additionally
we show that our conditions are robust in the sense that they persist under
small perturbations of the parameters in some suitable family. We also present
some simulations that illustrate our results.


title:
Radiative Origin of All Quark and Lepton Masses through Dark Matter with
  Flavor Symmetry

abstract:
  The fundamental issue of the origin of mass for all quarks and leptons
(including Majorana neutrinos) is linked to dark matter, odd under an exactly
conserved Z(2) symmetry which may or may not be derivable from an U(1) gauge
symmetry. The observable sector interacts with a proposed dark sector which
consists of heavy neutral singlet Dirac fermions and suitably chosen new
scalars. Flavor symmetry is implemented in a renormalizable context with just
the one Higgs doublet of the standard model in such a way that all observed
fermions obtain their masses radiatively through dark matter.


title: Environmental Evolutionary Graph Theory

abstract:
  Understanding the influence of an environment on the evolution of its
resident population is a major challenge in evolutionary biology. Great
progress has been made in homogeneous population structures while heterogeneous
structures have received relatively less attention. Here we present a
structured population model where different individuals are best suited to
different regions of their environment. The underlying structure is a graph:
individuals occupy vertices, which are connected by edges. If an individual is
suited for their vertex, they receive an increase in fecundity. This framework
allows attention to be restricted to the spatial arrangement of suitable
habitat. We prove some basic properties of this model and find some
counter-intuitive results. Notably, 1) the arrangement of suitable sites is as
important as their proportion, and, 2) decreasing the proportion of suitable
sites may result in a decrease in the fixation time of an allele.


title: Modular interpolating functions for N=4 SYM

abstract:
  We construct interpolating functions fully compatible with S-duality. We then
consider the problem of resumming perturbative expansions for anomalous
dimensions of low twist non-protected operators in N=4 super Yang-Mills theory.
When the rank of the gauge group is small, the interpolations suggest that
anomalous dimensions of leading twist operators take their maximum value at the
point $\tau =\exp(i\pi/3)$. For fixed spin and large enough rank, there is a
level-crossing region, where the anomalous dimension of the leading twist
operator reaches its maximum and then bounces back.


title:
Breaking the EOS-Gravity Degeneracy with Masses and Pulsating
  Frequencies of Neutron Stars

abstract:
  A thorough understanding of many astrophysical phenomena associated with
compact objects requires reliable knowledge about both the equation of state
(EOS)of super-dense nuclear matter and the theory of strong-field gravity
simultaneously because of the EOS-gravity degeneracy. Currently, variations of
the neutron star (NS) mass-radius correlation from using alternative gravity
theories are much larger than those from changing the NS matter EOS within
known constraints. At least two independent observables are required to break
the EOS-gravity degeneracy. Using model EOSs for hybrid stars and a Yukawa-type
non-Newtonian gravity, we investigate both the mass-radius correlation and
pulsating frequencies of NSs. While the maximum mass of NSs increases, the
frequencies of the $f$, $p_1$, $p_2$, and $w_I$ pulsating modes are found to
decrease with the increasing strength of the Yukawa-type non-Newtonian gravity,
providing a useful reference for future determination simultaneously of both
the strong-field gravity and the supranuclear EOS by combining data of x-ray
and gravitational wave emissions of neutron stars.


title:
The sine-law gap probability, Painlev\'e 5, and asymptotic expansion by
  the topological recursion

abstract:
  The goal of this article is to rederive the connection between the Painlev\'e
$5$ integrable system and the universal eigenvalues correlation functions of
double-scaled hermitian matrix models, through the topological recursion
method. More specifically we prove, \textbf{to all orders}, that the WKB
asymptotic expansions of the $\tau$-function as well as of determinantal
formulas arising from the Painlev\'e $5$ Lax pair are identical to the large
$N$ double scaling asymptotic expansions of the partition function and
correlation functions of any hermitian matrix model around a regular point in
the bulk. In other words, we rederive the "sine-law" universal bulk asymptotic
of large random matrices and provide an alternative perturbative proof of
universality in the bulk with only algebraic methods. Eventually we exhibit the
first orders of the series expansion up to $O(N^{-5})$.


title: Exact Electronic Potentials in Coupled Electron-Ion Dynamics

abstract:
  We develop a novel approach to the coupled motion of electrons and ions that
focuses on the dynamics of the electronic subsystem. Usually the description of
electron dynamics involves an electronic Schr\"odinger equation where the
nuclear degrees of freedom appear as parameters or as classical trajectories.
Here we derive the exact Schr\"odinger equation for the subsystem of electrons,
staying within a full quantum treatment of the nuclei. This exact Schr\"odinger
equation features a time-dependent potential energy surface for electrons
(e-TDPES). We demonstrate that this exact e-TDPES differs significantly from
the electrostatic potential produced by classical or quantum nuclei.


title: New bounds for equiangular lines

abstract:
  A set of lines in $\mathbb{R}^n$ is called equiangular if the angle between
each pair of lines is the same. We address the question of determining the
maximum size of equiangular line sets in $\mathbb{R}^n$, using semidefinite
programming to improve the upper bounds on this quantity. Improvements are
obtained in dimensions $24 \leq n \leq 136$. In particular, we show that the
maximum number of equiangular lines in $\mathbb{R}^n$ is $276$ for all $24 \leq
n \leq 41$ and is 344 for $n=43.$ This provides a partial resolution of the
conjecture set forth by Lemmens and Seidel (1973).


title: Chaotic Arithmetic Coding for Secure Video Multicast

abstract:
  Arithmetic Coding (AC) is widely used for the entropy coding of text and
video data. It involves recursive partitioning of the range [0,1) in accordance
with the relative probabilities of occurrence of the input symbols. A data
(image or video) encryption scheme based on arithmetic coding called as Chaotic
Arithmetic Coding (CAC) has been presented in previous works. In CAC, a large
number of chaotic maps can be used to perform coding, each achieving Shannon
optimal compression performance. The exact choice of map is governed by a key.
CAC has the effect of scrambling the intervals without making any changes to
the width of interval in which the codeword must lie, thereby allowing
encryption without sacrificing any coding efficiency. In this paper, we use a
redundancy in CAC procedure for secure multicast of videos where multiple users
are distributed with different keys to decode same encrypted file. By
encrypting once, we can generate multiple keys, either of which can be used to
decrypt the encoded file. This is very suitable for video distribution over
Internet where a single video can be distributed to multiple clients in a
privacy preserving manner.


title: Representable Effect Algebras and Observables

abstract:
  We introduce a class of monotone $\sigma$-complete effect algebras, called
representable, which are $\sigma$-homomorphic images of a class of monotone
$\sigma$-complete effect algebras of functions taking values in the interval
$[0,1]$ and with pointwise defined effect algebra operations. We exhibit
different types of compatibilities and show their connection to
representability. Finally, we study observables and show situations when
information of an observable on all intervals of the form $(-\infty,t)$ gives
full information about the observable.


title:
Multistability and transition to chaos in the degenerate Hamiltonian
  system with weak nonlinear dissipative perturbation

abstract:
  The effect of small nonlinear dissipation on the dynamics of system with
stochastic web which is linear oscillator driven by pulses is studied. The
scenario of coexisting attractors evolution with the increase of nonlinear
dissipation is revealed. It is shown that the period-doubling transition to
chaos is possible only for third order resonance and only hard transitions can
be seen for all other resonances.


title: Further results on consensus formation in the Deffuant model

abstract:
  The so-called Deffuant model describes a pattern for social interaction, in
which two neighboring individuals randomly meet and share their opinions on a
certain topic, if their discrepancy is not beyond a given threshold $\theta$.
The major focus of the analyses, both theoretical and based on simulations,
lies on whether these single interactions lead to a global consensus in the
long run or not. First, we generalize a result of Lanchier for the Deffuant
model on $\mathbb{Z}$, determining the critical value for $\theta$ at which a
phase transition of the long term behavior takes place, to other distributions
of the initial opinions than i.i.d.\ uniform on $[0,1]$. Then we shed light on
the situations where the underlying line graph $\mathbb{Z}$ is replaced by
higher-dimensional lattices $\mathbb{Z}^d,\ d\geq2$, or the infinite cluster of
supercritical i.i.d.\ bond percolation on these lattices.


title: Non-Gaussian signatures of general inflationary trajectories

abstract:
  We carry out a numerical calculation of the bispectrum in generalised
trajectories of canonical, single--field inflation. The trajectories are
generated in the Hamilton-Jacobi (HJ) formalism based on Hubble Slow Roll (HSR)
parameters. The calculation allows generally shape and scale dependent
bispectra, or dimensionless $f_{NL}$, in the out-of-slow-roll regime. The
distributions of $f_{NL}$ for various shapes and HSR proposals are shown as an
example of how this procedure can be used within the context of Monte Carlo
exploration of inflationary trajectories. We also show how allowing
out-of-slow-roll behaviour can lead to a bispectrum that is relatively large
for equilateral shapes.


title:
Cosmic Microwave Background temperature and polarization anisotropies
  from the large-N limit of global defects

abstract:
  We determine the full C_l spectra and correlation functions of the
temperature and polarization anisotropies in the CMB, generated by a source
modeled by the large N limit of spontaneously broken global O(N)-theories. We
point out a problem in the standard approach of treating the radiation-matter
transition by interpolating the eigenvectors of the unequal-time correlators of
the source energy-momentum tensor. This affects the CMB predictions from all
type of cosmic defects. We propose a method to overcome this difficulty, and
find that in the large-N global model that we study, differences in the final
CMB power spectra amplitudes reach up to 25%, when compared to implementations
of the eigenvector interpolation technique. We discuss as well how to optimally
search for the contribution in the CMB from active sources such as cosmic
defects, in experiments like Planck, COrE and PRISM.


title: Using Social Information for Flow Allocation in MANETs

abstract:
  Adhoc networks enable communication between distributed, mobile wireless
nodes without any supporting infrastructure. In the absence of centralized
control, such networks require node interaction, and are inherently based on
cooperation between nodes. In this paper, we use social and behavioral trust of
nodes to form a flow allocation optimization problem. We initialize trust using
information gained from users' social relationships (from social networks) and
update the trusts metric over time based on observed node behaviors. We conduct
analysis of social trust using real data sets and used it as a parameter for
performance evaluation of our frame work in ns-3. Based on our approach we
obtain a significant improvement in both detection rate and packet delivery
ratio using social trust information when compared to behavioral trust alone.
Further, we observe that social trust is critical in the event of mobility and
plays a crucial role in bootstrapping the computation of trust.


title: Perturbative approach to Markovian open quantum systems

abstract:
  Perturbation theory (PT) is a powerful and commonly used tool in the
investigation of closed quantum systems. In the context of open quantum
systems, PT based on the Markovian quantum master equation is much less
developed. The investigation of open systems mostly relies on exact
diagonalization of the Liouville superoperator or quantum trajectories. In this
approach, the system size is rather limited by current computational
capabilities. Analogous to closed-system PT, we develop a PT suitable for open
quantum systems. This proposed method is useful in the analytical understanding
of open systems as well as in the numerical calculation of system properties,
which would otherwise be impractical.


title: LHC-scale left-right symmetry and unification

abstract:
  We construct a comprehensive list of non-supersymmetric standard model
extensions with a low-scale LR-symmetric intermediate stage that may be
obtained as simple low-energy effective theories within a class of
renormalizable $SO(10)$ GUTs. Unlike the traditional "minimal" LR models many
of our example settings support a perfect gauge coupling unification even if
the LR scale is in the LHC domain at a price of only (a few copies of) one or
two types of extra fields pulled down to the TeV-scale ballpark. We discuss the
main aspects of a potentially realistic model building conforming the basic
constraints from the quark and lepton sector flavour structure, proton decay
limits, etc. We pay a special attention to the theoretical uncertainties
related to the limited information about the underlying unified framework in
the bottom-up approach, in particular, to their role in the possible extraction
of the LR-breaking scale. We observe a general tendency for the models without
new coloured states in the TeV domain to be on the verge of incompatibility
with the proton stability constraints.


title:
On reconstruction of dynamic permeability and tortuosity from data at
  distinct frequencies

abstract:
  This article focuses on the mathematical problem of reconstructing dynamic
permeability $K(\omega)$ of two-phase composites from data at different
frequencies, utilizing the analytic structure of the Stieltjes function
representation of $K(\omega)$ derived by Avellaneda and Tortquato in
\cite{avellaneda1991rigorous-link-b}, which is valid for all pore space
geometry. The integral representation formula (IRF) for dynamic tortuosity is
derived and its analytic structure exploited for reconstructing the function
from a finite data set. All information of pore-space microstructure is
contained in the measure of the IRF. The theory of multipoint Pad\'{e}
approximates for Stieltjes functions guarantees the existence of relaxation
kernels that can approximate the dynamic permeability function and the dynamic
tortuosity function with high accuracy. In this paper, a numerical algorithm is
proposed for computing the relaxation time and the corresponding strength for
each element in the relaxation kernels; in the frequency domain, the
approximation can be regarded as approximating the Stieltjes function by
rational functions with simple poles and positive residues. With the idea from
dehomogenization, we also established the exact relations between the moments
of the positive measures in the IRFs of permeability and tortuosity with two
important parameters in the theory of poroelasticity: the infinite-frequency
tortuosity $\alpha_\infty$ for general case and the weighted volume-to-surface
ratio $\Lambda$ for the JKD model. From these relations, we suggest a new way
for evaluating these two microstructure-dependent parameters from a finite data
set of permeability and given values of porosity $\phi$ and pore fluid kinetic
viscosity $\nu$. Numerical results for JKD permeability and tortuosity are
presented.


title:
Order of convergence of the finite element method for the
  $p(x)-$Laplacian

abstract:
  In this work, we study the rate of convergence of the finite element method
for the $p(x)$Laplacian ($1< p_1\leq p(x)\leq p_2\leq 2$) in two dimensional
convex domains.


title: Infrastructure Logicielle d un Environnement Hospitalier Intelligent

abstract:
  The impact of new technologies in the field of healthcare has been proven to
be satisfactory in improving the quality of care and services for patients. The
hospital environment is undoubtedly one of the environments where human or
hardware errors can cause harmful damage. It is therefore very useful for the
sector to be at the forefront of technology and use the strongest and most
efficient means since it is supposed to be an environment of reliability, trust
and is legally responsible for ensuring the confidentiality of all patient
information. In this project we have proposed and developed a smart hospital
enviornement that allows both, detecting patien fall and send alerts to the
suitable parties, and securing patien stored data through RFID technology.


title: Answer to a question by Fujita on Variation of Hodge Structures

abstract:
  We first provide details for the proof of Fujita's second theorem for
K\"ahler fibre spaces over a curve, asserting that the direct image $V$ of the
relative dualizing sheaf splits as the direct sum $ V = A \oplus Q$, where $A$
is ample and $Q$ is unitary flat. Our main result then answers in the negative
the question posed by Fujita whether $V$ is semiample. In fact, $V$ is
semiample if and only if $Q$ is associated to a representation of the
fundamental group of $B$ having finite image. Our examples are based on
hypergeometric integrals.


title:
Combination and mean width rearrangements of solutions of elliptic
  equations in convex sets

abstract:
  We introduce a method to compare solutions of different equations in
different domains. As a consequence, we define a new kind of rearrangement
which applies to solution of fully nonlinear equations $F(x,u,Du,D^2u)=0$, not
necessarily in divergence form, in convex domains and we obtain Talenti's type
results for this kind of rearrangement.


title:
Spin polarized induction of quantum correlations-entanglement using a 2
  MeV proton beam channeling

abstract:
  In solid_state hybrid electron_nuclear spin systems quantum entanglement
plays vital role in allowing accessible transfer of information between
subatomic particles, regardless of the host lattice coordination spatial
geometry, revealing the powerful resource for nuclear quantum states
engineering. Here we present study of 2 MeV superfocused channeled proton (SCP)
beam induced polarization of atom_photon correlated states, established in
isotopically purified silicon nanocrystal. Two level entangling interaction
which couples an initial quantum state to two possible light_matter states via
silicon nanocrystal interface is presented. The anisotropic hyperfine coupling
is demonstrated by strong mixing of quantum states within the control mechanism
of the coherent proton pulse sequence. Obtained results reveal the mutual
predictable correlation of particles of energy_matter, by using the fully
broadcastable and precise hybrid electron_nuclear spin qubit manipulations
which can be exploited for the speed_superior communication channels keeping at
the same time the maximum degree of data preservation.


title:
Impact of a circularly polarized cavity photon field on the charge and
  spin flow through an Aharonov-Casher ring

abstract:
  We explore the influence of a circularly polarized cavity photon field on the
transport properties of a finite-width ring, in which the electrons are subject
to spin-orbit and Coulomb interaction. The quantum ring is embedded in an
electromagnetic cavity and described by ``exact'' numerical diagonalization. We
study the case that the cavity photon field is circularly polarized and compare
it to the linearly polarized case. The quantum device is moreover coupled to
external, electrically biased leads. The time propagation in the transient
regime is described by a non-Markovian generalized master equation. We find
that the spin polarization and spin photocurrents of the quantum ring are
largest for circularly polarized photon field and destructive Aharonov-Casher
(AC) phase interference. The charge current suppression dip due to the
destructive AC phase becomes threefold under the circularly polarized photon
field as the interaction of the electrons' angular momentum and spin angular
momentum of light causes many-body level splitting leading to three many-body
level crossing locations instead of one. The circular charge current inside the
ring, which is induced by the circularly polarized photon field, is found to be
suppressed in a much wider range around the destructive AC phase than the
lead-device-lead charge current. The charge current can be directed through one
of the two ring arms with the help of the circularly polarized photon field,
but is superimposed by vortices of smaller scale. Unlike the charge
photocurrent, the flow direction of the spin photocurrent is found to be
independent of the handedness of the circularly polarized photon field.


title:
The genomic landscape of meiotic crossovers and gene conversions in
  Arabidopsis thaliana

abstract:
  Knowledge of the exact distribution of meiotic crossovers (COs) and gene
conversions (GCs) is essential for understanding many aspects of population
genetics and evolution, from haplotype structure and long-distance genetic
linkage to the generation of new allelic variants of genes. To this end, we
resequenced the four products of 13 meiotic tetrads along with 10 doubled
haploids derived from Arabidopsis thaliana hybrids. GC detection through short
reads has previously been confounded by genomic rearrangements. Rigid filtering
for misaligned reads allowed GC identification at high accuracy and revealed an
~80-kb transposition, which undergoes copy-number changes mediated by meiotic
recombination. Non-crossover associated GCs were extremely rare most likely due
to their short average length of ~25-50 bp, which is significantly shorter than
the length of CO associated GCs. Overall, recombination preferentially targeted
non-methylated nucleosome-free regions at gene promoters, which showed
significant enrichment of two sequence motifs.


title: The oral tolerance as a complex network phenomenon

abstract:
  The phenomenon of oral tolerance refers to a local and systemic state of
tolerance, induced in the gut associated lymphoid tissues, after its exposure
to innocuous antigens, such as food proteins. While recent findings shed light
in the cellular and molecular basis of oral tolerance, the network of
interactions between the components mediating oral tolerance has not been
investigated yet. Our work brings a complex systems theory approach, aiming to
identify the contribution of each element in an oral tolerance network. We also
propose a model that allows dynamical plus topological quantifying which must
encompass functional responses as the local host involved on the oral
tolerance. To keep track of reality of our model, we test knockout (KO) of
immunological components (i. e. silencing a vertex) and see how it diverges
when the system is topologically health. The results from these simulated KO's
are then compared to real molecular knock-outs. To infer from these processing
we apply a new implementation of a random walk algorithm for directed graphs,
which ultimately generate statistical quantities provided by the dynamical
behaviour of the simulated KO's. It was observed that the a specifics KO caused
the greatest impact on network standard flux. In a brief analysis, the results
obtained correspond to biological data. Our model addresses both topological
proprieties and dynamical relations. The construction of a qualitative dynamic
model for oral tolerance could reflect empirical observations, through the
standard flux results and relative error based on individual knockout.


title: Doomsday Equilibria for Omega-Regular Games

abstract:
  Two-player games on graphs provide the theoretical frame- work for many
important problems such as reactive synthesis. While the traditional study of
two-player zero-sum games has been extended to multi-player games with several
notions of equilibria, they are decidable only for perfect-information games,
whereas several applications require imperfect-information games. In this paper
we propose a new notion of equilibria, called doomsday equilibria, which is a
strategy profile such that all players satisfy their own objective, and if any
coalition of players deviates and violates even one of the players objective,
then the objective of every player is violated. We present algorithms and
complexity results for deciding the existence of doomsday equilibria for
various classes of omega-regular objectives, both for imperfect-information
games, and for perfect-information games. We provide optimal complexity bounds
for imperfect-information games, and in most cases for perfect-information
games.


title: On free stochastic processes and their derivatives

abstract:
  We study a family of free stochastic processes whose covariance kernels $K$
may be derived as a transform of a tempered measure $\sigma$. These processes
arise, for example, in consideration non-commutative analysis involving free
probability. Hence our use of semi-circle distributions, as opposed to
Gaussians. In this setting we find an orthonormal bases in the corresponding
non-commutative $L^2$ of sample-space. We define a stochastic integral for our
family of free processes.


title: Connectivity for bridge-alterable graph classes

abstract:
  A collection of graphs is called bridge-alterable if, for each graph G with a
bridge e, G is in the class if and only if G-e is. For example the class of
forests is bridge-alterable. For a random forest $F_n$ sampled uniformly from
the set of forests on vertex set {1,..,n}, a classical result of Renyi (1959)
shows that the probability that $F_n$ is connected is $e^{-1/2 +o(1)}$.
Recently Addario-Berry, McDiarmid and Reed (2012) and Kang and Panagiotou
(2013) independently proved that, given a bridge-alterable class, for a random
graph $R_n$ sampled uniformly from the graphs in the class on {1,..,n}, the
probability that $R_n$ is connected is at least $e^{-1/2 +o(1)}$. Here we give
a more straightforward proof, and obtain a stronger non-asymptotic form of this
result, which compares the probability to that for a random forest. We see that
the probability that $R_n$ is connected is at least the minimum over $\frac25 n
< t \leq n$ of the probability that $F_t$ is connected.


title: On Marginal Deformations and Non-Integrability

abstract:
  We study the interplay between a particular marginal deformation of ${\cal
N}=4$ super Yang-Mills theory, the $\beta$ deformation, and integrability in
the holographic setting. Using modern methods of analytic non-integrability of
Hamiltonian systems, we find that, when the $\beta$ parameter takes imaginary
values, classical string trajectories on the dual background become
non-integrable. We expect the same to be true for generic complex $\beta$
parameter. By exhibiting the Poincar\'e sections and phase space trajectories
for the generic complex $\beta$ case, we provide numerical evidence of strong
sensitivity to initial conditions. Our findings agree with expectations from
weak coupling that the complex $\beta$ deformation is non-integrable and
provide a rigorous argument beyond the trial and error approach to
non-integrability.


title:
Description and commissioning of NEXT-MM prototype: first results from
  operation in a Xenon-Trimethylamine gas mixture

abstract:
  A technical description of NEXT-MM and its commissioning and first
performance is reported. Having an active volume of ~35 cm drift $\times$ 28 cm
diameter, it constitutes the largest Micromegas-read TPC operated in Xenon ever
constructed, made by a sectorial arrangement of the 4 largest single wafers
manufactured with the Microbulk technique to date. It is equipped with a
suitably pixelized readout and with a sufficiently large sensitive volume (~23
l) so as to contain long (~20 cm) electron tracks. First results obtained at 1
bar for Xenon and trimethylamine (Xe-(2 %)TMA) mixture are presented. The TPC
can accurately reconstruct extended background tracks. An encouraging
full-width half-maximum of 11.6 % was obtained for ~29 keV gammas without
resorting to any data post-processing.


title:
Systems Variability Modeling: A Textual Model Mixing Class and Feature
  Concepts

abstract:
  System reuse and cost are very important in software product line design
area. Developers goal is to increase system reuse and decreasing cost and
efforts for building components from scratch for each software configuration.
This can be reached by developing Software Product Line (SPL). To handle SPL
engineering process, several approaches with several techniques were developed.
One of these approaches is called separated approach. It requires separating
the commonalities and variability for system components to allow configuration
selection based on user defined features. Textual notation-based approaches
have been used for their formal syntax and semantics to represent system
features and implementations. But these approaches are still weak in mixing
features (conceptual level) and classes (physical level) that guarantee smooth
and automatic configuration generation for software releases. The absence of
methodology supporting the mixing process is a real weakness. In this paper, we
enhanced SPL reuse by introducing some meta-features, classified according to
their functions. As a first consequence, mixing class and feature concepts is
supported in a simple way using class interfaces and inherent features for
smooth move from feature model to class model. And as a second consequence, the
mixing process is supported by a textual design and implementation methodology,
mixing class and feature models by combining their concepts in a single
language. The supported configuration generation process is simple, coherent,
and complete.


title:
Quasimodal expansion of electromagnetic fields in open two-dimensionnal
  structures

abstract:
  A quasimodal expansion method (QMEM) is developed to model and understand the
scattering properties of arbitrary shaped two-dimensional (2-D) open
structures. In contrast with the bounded case which have only discrete spectrum
(real in the lossless media case), open resonators show a continuous spectrum
composed of radiation modes and may also be characterized by resonances
associated to complex eigenvalues (quasimodes). The use of a complex change of
coordinates to build Perfectly Matched Layers (PMLs) allows the numerical
computation of those quasimodes and of approximate radiation modes.
Unfortunately, the transformed operator at stake is no longer self-adjoint, and
classical modal expansion fails. To cope with this issue, we consider an
adjoint eigenvalue problem which eigenvectors are bi-orthogonal to the
eigenvectors of the initial problem. The scattered field is expanded on this
complete set of modes leading to a reduced order model of the initial problem.
The different contributions of the eigenmodes to the scattered field
unambiguously appears through the modal coefficients, allowing us to analyze
how a given mode is excited when changing incidence parameters. This gives new
physical insights to the spectral properties of different open structures such
as nanoparticles and diffraction gratings. Moreover, the QMEM proves to be
extremely efficient for the computation of Local Density Of States (LDOS).


title: True Muonium $(\mu^+ \mu^-)$ on the Light Front

abstract:
  Applying Discretized Light Cone Quantization, we perform the first
calculation of the spectrum of true muonium, the $\mu^+ \mu^-$ atom, as
modified by the inclusion of an $|e\bar e >$ Fock component. The shift in the
mass eigenvalue is found to be largest for triplet states. If $m_e$ is taken to
be a substantial fraction of $m_\mu$, the integrated probability of the
electronic component of the $1 \, {}^3 /! S_1$ state is found to be as large as
$O(10^{-2})$. Initial studies of the Lamb shift for the atom are performed.
Directions for making the simulations fully realistic are discussed.


title:
Lithium abundance and surface magnetic fields: new constraints in
  magnetic models of M dwarfs

abstract:
  Precision modeling of M dwarfs has become worthwhile in recent years due to
the increasingly precise values of masses and radii which can be obtained from
eclipsing binary studies. Torres (2013) has identified 4 prime M dwarf pairs
with the most precise empirical determinations of masses and radii. The
measured radii are consistently larger than standard stellar models predict. We
have previously modeled M dwarfs in the context of a criterion due to Gough &
Tayler in which magnetic fields inhibit the onset of convection according to a
physics-based prescription. New constraints on the models of M dwarfs are now
provided by measurements of lithium abundances. The key aspect of Li in terms
of setting constraints on magnetic modeling is that Li burning starts at T =
2.5 MK, and temperatures of just such magnitude are associated with the base of
the convection zone: magnetic inhibition of convective onset can shift this
base slightly closer to the surface, i.e. to slightly lower temperatures,
thereby reducing the amount of Li depletion compared to a non-magnetic model.
In the present paper, we consider how our magneto-convection models handle the
new test of stellar structure provided by Li measurements. Among the prime
systems listed by Torres, we find that plausible magnetic models work well for
CM Dra and YY Gem but not for CU Cnc. (The fourth system in Torres's list does
not yet have enough information to warrant magnetic modeling.) For CU Cnc, we
suggest that the observed lithium may have been accreted from a circumstellar
disk. We find that our magneto-convection models of CM Dra, YY Gem and CU Cnc
yield results which are consistent with the observed correlation between
magnetic flux and X-ray luminosity.


title: Radiative transitions in pNRQCD

abstract:
  We review recent model independent determinations of the radiative
transitions of heavy quarkonium obtained using potential NRQCD.


title:
Species-specific differences in follicular antral sizes result from
  diffusion-based limitations on the thickness of the granulosa cell layer

abstract:
  The size of mature oocytes is similar across mammalian species, yet the size
of ovarian follicles increases with species size, with some ovarian follicles
reaching diameters more than 1000-fold the size of the enclosed oocyte. Here we
show that the different follicular sizes can be explained with diffusion-based
limitations on the thickness of the hormone-secreting granulosa layer. By
analysing published data on human follicular growth and granulosa cell
expansion during follicular maturation we find that the 4-fold increase of the
antral follicle diameter is entirely driven by an increase in the follicular
fluid volume, while the thickness of the surrounding granulosa layer remains
constant at about 45+/-10 mkm. Based on the measured kinetic constants, the
model reveals that the observed fall in the gonadotropin concentration from
peripheral blood circulation to the follicular antrum is a result of
sequestration in the granulosa. The model further shows that as a result of
sequestration, an increased granulosa thickness cannot substantially increase
estradiol production but rather deprives the oocyte from gonadotropins. Larger
animals (with a larger blood volume) require more estradiol as produced by the
ovaries to downregulate FSH-secretion in the pituitary. Larger follicle
diameters result in larger follicle surface areas for constant granulosa layer
thickness. The reported increase in follicular surface area in larger species
indeed correlates linearly both with species mass and with the predicted
increase in estradiol output. In summary, we propose a structural role for the
antrum in that it determines the volume of the granulosa layer and thus the
level of estrogen production.


title: Density of potentially crystalline representations of fixed weight

abstract:
  Let K be a finite extension of Qp. We fix a continuous absolutely irreducible
representation of the absolute Galois group of K over a finite dimensional
vector space with coefficient in a finite field of characteristic p and
consider its universal deformation ring R. If we fix a regular set of
Hodge-Tate weights k, we prove, under some hypothesis, that the closed points
of Spec(R[1/p]) corresponding to potentially crystalline representations of
fixed Hodge-Tate weights k are dense in Spec(R[1/p]) for the Zariski topology.


title:
De-biased Populations of Kuiper Belt Objects from the Deep Ecliptic
  Survey

abstract:
  The Deep Ecliptic Survey (DES) discovered hundreds of Kuiper Belt objects
from 1998-2005. Follow-up observations yielded 304 objects with good dynamical
classifications (Classical, Scattered, Centaur, or 16 mean-motion resonances
with Neptune). The DES search fields are well documented, enabling us to
calculate the probability of detecting objects with particular orbital
parameters and absolute magnitudes at a randomized point in each orbit.
Grouping objects together by dynamical class leads, we estimate the orbital
element distributions (a, e, i) for the largest three classes (Classical, 3:2,
and Scattered) using maximum likelihood. Using H-magnitude as a proxy for the
object size, we fit a power law to the number of objects for 8 classes with at
least 5 detected members (246 objects). The best Classical slope is
alpha=1.02+/-0.01 (observed from 5<=H<=7.2). Six dynamical classes (Scattered
plus 5 resonances) are consistent in slope with the Classicals, though the
absolute number of objects is scaled. The exception to the power law relation
are the Centaurs (non-resonant with perihelia closer than Neptune, and thus
detectable at smaller sizes), with alpha=0.42+/-0.02 (7.5<H<11). This is
consistent with a knee in the H-distribution around H=7.2 as reported elsewhere
(Bernstein et al. 2004, Fraser et al. 2014). Based on the Classical-derived
magnitude distribution, the total number of objects (H<=7) in each class are:
Classical (2100+/-300 objects), Scattered (2800+/-400), 3:2 (570+/-80), 2:1
(400+/-50), 5:2 (270+/-40), 7:4 (69+/-9), 5:3 (60+/-8). The independent
estimate for the number of Centaurs in the same H range is 13+/-5. If instead
all objects are divided by inclination into "Hot" and "Cold" populations,
following Fraser et al. (2014), we find that alphaHot=0.90+/-0.02, while
alphaCold=1.32+/-0.02, in good agreement with that work.


title: Testing Chern-Simons gravity with black holes?

abstract:
  We investigate the possibility to distinguish the small-coupling,
slow-rotation black hole solution of Chern-Simons (CS) gravity from the Kerr
solution. We develop simulations of electromagnetic observables in the vicinity
of CS and Kerr black holes. We show that the typical relative observable
difference between CS and Kerr spacetimes is of the order of 0.1% thus beyond
reach of current or near-future instruments.


title:
Excitation of radial collective modes in a quantum dot: Beyond linear
  response

abstract:
  We compare the response of five different models of two interacting electrons
in a quantum dot to an external short lived radial excitation that is strong
enough to excite the system well beyond the linear response regime. The models
considered describe the Coulomb interaction between the electrons in different
ways ranging from mean-field approaches to configuration interaction (CI)
models, where the two-electron Hamiltonian is diagonalized in a large truncated
Fock space. The radially symmetric excitation is selected in order to severely
put to test the different approaches to describe the interaction and
correlations of an electron system in a nonequilibrium state. As can be
expected for the case of only two electrons none of the mean-field models can
in full details reproduce the results obtained by the CI model. Nonetheless,
some linear and nonlinear characteristics are reproduced reasonably well. All
the models show activation of an increasing number of collective modes as the
strength of the excitation is increased. By varying slightly the confinement
potential of the dot we observe how sensitive the properties of the excitation
spectrum are to the Coulomb interaction and its correlation effects. In order
to approach closer the question of nonlinearity we solve one of the mean-field
models directly in a nonlinear fashion without resorting to iterations.


title: Modelling magnetism of C at O and B monovacancies in graphene

abstract:
  The presence of defects can introduce important changes in the electronic
structure of graphene, leading to phenomena such as C magnetism. In addition,
vacancies are reactive and permit the incorporation of dopants. This paper
discusses the electronic properties of defective graphene for O and B
decoration. Phonon calculations allow us to address directly the stability of
the systems under study. We show that it is possible to obtain magnetic
solutions with and without dangling bonds, demonstrating that C magnetism can
be achieved in the presence of B and O.