title: Spectral functions of charmonium from 2 flavour anisotropic lattice data

abstract:
  The spectral functions of QCD can give us insight into properties of hadrons,
and they are useful in probing the QCD vacuum. I will discuss the correlators
and spectral functions of charmonium in high temperature two flavour QCD. The
spectral functions have been obtained using the Maximum Entropy Method from
anisotropic lattice data using the conserved vector current. This work has been
done as part of the FASTSUM collaboration. We find that the spectral functions
for zero momentum are stable. At non-zero momentum the spectral functions are
less stable but still produce resonance and transport peaks. This work is part
of our programme to calculate the heavy quark diffusion constant.


title: A Note on the Geometry of Positively-Curved Riemannian Manifolds

abstract:
  In this paper I present a comparison theorem for the waist of Riemannian
manifolds with positive sectional curvature. The main theorem of this paper
gives a partial positive answer to a conjecture formulated by M.Gromov in [8].
The content of this paper combines two aspects: classical volume comparison
theorems of Riemannian geometry, and geometric measure theoretic ideas stemming
from Almgren-Pitts Min-Max theory


title:
A Survey for Ground-State OH Masers Toward a Sample of Herbig-Haro
  Objects

abstract:
  Herbig-Haro objects are regions of shocked gas and dust which are produced
when collimated outflows from a protostar interact with the surrounding dense
gas. They have many similarities to supernova remnants which are interacting
with molecular clouds. 1720-MHz OH masers have been identified towards a number
of interacting supernova remnants. Observations and models indicate that these
masers are shock excited and are produced behind C-type shocks. If conditions
behind the shock fronts of Herbig-Haro objects are similarly able to support
1720-MHz OH masers they could be a useful diagnostic tool for star formation.
We therefore searched for 1720-MHz OH maser emission towards a sample of 97
Herbig-Haro objects using the Green Bank radio telescope. We detected 1720-MHz
OH lines in emission in 17 of them, but neither their spectral signature nor
follow-up observations with the Very Large Array showed any conclusive evidence
of maser emission. We conclude that the emission detected from our single-dish
observations must be extended and most likely originates from thermal or
quasi-thermal excitation processes. We also investigated the properties of
Herbig-Haro shocks more closely and conclude that despite the overall
similarities to supernova remnants, the conditions required for maser emission,
in particular, a sufficient velocity-coherent column density, are not likely to
occur in Herbig-Haro objects.


title: Fall back accretion and energy injections in gamma-ray bursts

abstract:
  Intense flares that occur at late times relative to the prompt phase have
been observed by the $Swift$ satellite in the X-ray afterglows of gamma-ray
bursts (GRBs). Here, we present a detailed analysis on the fall back accretion
process to explain the intense flare phase in the very early X-ray afterglow
light curves. To reproduce the afterglow at late times, we resort to the
external shock by engaging energy injections. By applying our model to GRBs
080810, 081028 and 091029, we show that their X-ray afterglow light curves can
be reproduced well. We then apply our model to the ultra-long $Swift$ GRB
111209A, which is the longest burst ever observed. The very early X-ray
afterglow of GRB 111209A showed many interesting features, such as a
significant bump observed at around 2000 s after the $Swift$/BAT trigger. We
assume two constant energy injection processes in our model. These can explain
the observed plateau at X-ray wavelength in the relatively early stage
($8.0\times10^{3}$ s) and a second X-ray plateau and optical rebrightening at
about $10^{5}$ s. Our analysis supports the scenario that a significant amount
of material may fall back toward the central engine after the prompt phase,
causing an enhanced and long lived mass accretion rate powering a
Poynting-flux-dominated outflow.


title: Exact Global Phantonical Solutions in the Emergent Universe

abstract:
  We present new classes of exact solutions for an Emergent Universe supported
by phantom and canonical scalar fields in the framework of a two-component
chiral cosmological model. We outline in detail the method of deriving exact
solutions, discuss the potential and kinetic interaction for the model and
calculate key cosmological parameters. We suggest that this this model be
called a {\it phantonical Emergent Universe} because of the necessity to have
phantom and canonical chiral fields. The solutions obtained are valid for all
time.


title:
Pulse force nanolithography on hard surfaces using atomic force
  microscopy with a sharp single-crystal diamond tip

abstract:
  AFM-based technique of nanolithography is proposed. The method enables rapid
point by point indentation with a sharp tip. When used in tandem with
single-crystal diamond tips, this technique allows the creation of high aspect
ratio grooves in hard materials, such as silicon or metals. Examples of
fabricated groove arrays on Si surface with 30-100 nm pitches and 5-32 nm
depths are presented. Cutting of a 63nm thick metal magnetic film demonstrated.
The resulting structure is studied by use of magnetic force microscopy.


title: Constraints on Self Interacting Dark Matter from IceCube Results

abstract:
  If dark matter particles self-interact, their capture by astrophysical
objects should be enhanced. As a consequence, the rate by which they annihilate
at the center of the object will increase. If their self scattering is strong,
it can be observed indirectly through an enhancement of the flux of their
annihilation products. Here we investigate the effect of self-interaction on
the neutrino flux produced by annihilating dark matter in the center of the
Sun. We consider annihilation into two channels: $W^+W^-$ (or $\tau^+\tau^-$
for a dark matter mass below the $W$ mass) and $b\overline{b}$. We estimate the
event rate in the IceCube detector, using its 79 string configuration, and
compare our prediction to their experimental results, hence probing dark matter
self interacting models.


title:
A volume-limited sample of X-ray galaxy groups and clusters - I. Radial
  entropy and cooling time profiles

abstract:
  We present the first results of our study of a sample of 101 X-ray galaxy
groups and clusters, which is volume-limited in each of three X-ray luminosity
bins. The aim of this work is to study the properties of the innermost ICM in
the cores of our groups and clusters, and to determine the effect of
non-gravitational processes, such as active galactic nucleus (AGN) feedback, on
the ICM. The entropy of the ICM is of special interest, as it bears the imprint
of the thermal history of a cluster, and it also determines a cluster's global
properties. Entropy profiles can therefore be used to examine any deviations
from cluster self-similarity, as well as the effects of feedback on the ICM. We
find that the entropy profiles are well-fitted by a simple powerlaw model, of
the form $K(r) = \alpha\times(r/100 \rm{kpc})^{\beta}$, where $\alpha$ and
$\beta$ are constants. We do not find evidence for the existence of an "entropy
floor", i.e. our entropy profiles do not flatten out at small radii, as
suggested by some previous studies.


title:
Gromov - Witten invariants and integrable hierarchies of topological
  type

abstract:
  We outline two approaches to the construction of integrable hierarchies
associated with the theory of Gromov - Witten invariants of smooth projective
varieties. We argue that a comparison of these two approaches yields nontrivial
constraints on Chern numbers of varieties with semisimple quantum cohomology.


title: Notes on topological strings and knot contact homology

abstract:
  We give an introduction to the physics and mathematics involved in the
recently observed relation between topological string theory and knot contact
homology and then discuss this relation. The note is based on two lectures
given at the Gokova Geometry and Topology Conference, 2013 and reports on joint
work by Aganagic, Ng, Vafa, and the author.


title: Adaptive Intelligent Controller for Household Cooling Systems

abstract:
  This paper presents a household cooling system controller which is adaptive
and intelligent in nature. It is able to control the speed of a household
cooling fan or an air conditioner based on the real time data namely room
temperature, humidity and time i.e. duration, which are collected from
environment. To control the speed in an adaptive and intelligent manner an
associative memory neural network has been used. This embedded system is able
to learn from training set i.e. the user can teach the system about his/her
feelings through training data sets. When the system starts up it allows the
fan to run freely i.e. at full speed and after certain interval it takes the
environmental parameters like room temperature, humidity and time i.e.
duration, as an input and after that system takes the decision and controls the
speed of the fan.


title: On groups with linear sci growth

abstract:
  We prove that the semistability growth of hyperbolic groups is linear, which
implies that hyperbolic groups which are sci (simply connected at infinity)
have linear sci growth. Based on the linearity of the end-depth of finitely
presented groups we show that the linear sci is preserved under amalgamated
products over finitely generated one-ended groups. Eventually one proves that
most non-uniform lattices have linear sci.


title: Nonlinear Dimensionality Reduction via Path-Based Isometric Mapping

abstract:
  Nonlinear dimensionality reduction methods have demonstrated top-notch
performance in many pattern recognition and image classification tasks. Despite
their popularity, they suffer from highly expensive time and memory
requirements, which render them inapplicable to large-scale datasets. To
leverage such cases we propose a new method called "Path-Based Isomap". Similar
to Isomap, we exploit geodesic paths to find the low-dimensional embedding.
However, instead of preserving pairwise geodesic distances, the low-dimensional
embedding is computed via a path-mapping algorithm. Due to the much fewer
number of paths compared to number of data points, a significant improvement in
time and memory complexity without any decline in performance is achieved. The
method demonstrates state-of-the-art performance on well-known synthetic and
real-world datasets, as well as in the presence of noise.


title: Round-The-Clock Urine Sugar Monitoring System for Diabetic Patients

abstract:
  It is known that diabetes can not be cured completely, but it can be
controlled. The objective of this work is to provide an automatic system that
will be able to help the diabetic patient to control the blood sugar. This
system measures the blood sugar level of the people from their urine
round-the-clock. A recorded message based on this input may be displayed so
that apart from patient himself others can be informed about his/her present
sugar level. That should help him/her in taking medicine; controlling diet etc.
This work is an application of image processing and fuzzy logic. It is known
that Benedict's reagent changes its colour based on the sugar level. This
colour change information is sensed by the transducer and fed to the fuzzy
logic unit for decision making.


title: Wave mitigation in ordered networks of granular chains

abstract:
  We study the propagation of stress waves through ordered 2D networks of
granular chains. The quasi-particle continuum theory employed captures the
acoustic pulse splitting, bending, and recombination through the network and is
used to derive its effective acoustic properties. The strong wave mitigation
properties of the network predicted theoretically are confirmed through both
numerical simulations and experimental tests. In particular, the leading pulse
amplitude propagating through the system is shown to decay exponentially with
the propagation distance and the spatial structure of the transmitted wave
shows an exponential localization along the direction of the incident wave. The
length scales that characterized these exponential decays are studied and
determined as a function of the geometrical properties of the network. These
results open avenues for the design of efficient impact mitigating structures
and provide new insights into the mechanisms of wave propagation in granular
matter.


title:
Dynamical properties of three terminal magnetic tunnel junctions:
  spintronics meets spin-orbitronics

abstract:
  This letter introduces a micromagnetic model able to characterize the
magnetization dynamics in three terminal magnetic tunnel junctions, where the
effects of spin-transfer torque and spin-orbit torque are taken into account.
Our results predict that the possibility to separate electrically those two
torque sources is very promising from a technological point of view for both
next generation of nanoscale spintronic oscillators and microwave detectors. A
scalable synchronization scheme based on the parallel connection of those three
terminal devices is also proposed.


title: Stoner instability revisited: Emergence of local quantum criticality?

abstract:
  We revisit Stoner instability, an old problem but in a modern point of view.
An idea is to extract out dynamics of directional fluctuations of spins
explicitly, resorting to the CP$^{1}$ representation and integrating over their
amplitude fluctuations. As a result, we derive an effective field theory for
ferromagnetic quantum phase transitions in terms of bosonic spinons and
fermionic holons. We show that this effective field theory reproduces
overdamped spin dynamics in a paramagnetic Fermi liquid and magnon spectrum in
a ferromagnetic Fermi liquid. An interesting observation is that the velocity
of spinons becomes zero, approaching the ferromagnetic quantum critical point,
which implies emergence of local quantum criticality. Based on this scenario,
we predict the $\omega/T$ scaling behavior near ferromagnetic quantum
criticality beyond the conventional scenario of the weak-coupling approach.


title:
Reconsidering the possibility of room temperature ferromagnetism in Mn
  doped Zirconium oxide

abstract:
  The possibility to induce long range ferromagnetic order by doping oxides
with transition metal ions has become a very exciting challenge in the last
decade. Theoretically, it has been claimed that Mn doped ZrO$_2$ could be a
very promising spintronic candidate and that high critical temperatures could
be already achieved even for a low Mn concentration. Some experiments have
reported room temperature ferromagnetism (RT-FM) whilst some others only
paramagnetism. When observed, the nature of RT-FM appears to be controversial
and not clearly understood. In this study, we propose to clarify and shed light
on some of theses existing issues. A detailed study of the critical
temperatures and low energy magnetic excitations in Mn doped ZrO$_2$ is
performed. We show that the Curie temperatures were largely overestimated
previously, due to the inadequate treatment of both thermal and transverse
fluctuations, and disorder. It appears that the Mn-Mn couplings can not explain
the observed RT-FM. We argue, that this can be attributed to the interaction
between large moments induced in the vicinity of the manganese. This is similar
to the non-magnetic defect induced ferromagnetism reported in oxides,
semiconductors and graphene/graphite.


title: Automatic White Blood Cell Measuring Aid for Medical Diagnosis

abstract:
  Blood related invasive pathological investigations play a major role in
diagnosis of diseases. But in India and other third world countries there are
no enough pathological infrastructures for medical diagnosis. Moreover, most of
the remote places of those countries have neither pathologists nor physicians.
Telemedicine partially solves the lack of physicians. But the pathological
investigation infrastructure can not be integrated with the telemedicine
technology. The objective of this work is to automate the blood related
pathological investigation process. Detection of different white blood cells
has been automated in this work. This system can be deployed in the remote area
as a supporting aid for telemedicine technology and only high school education
is sufficient to operate it. The proposed system achieved 97.33 percent
accuracy for the samples collected to test this system.


title: Moving perturbation in a one-dimensional Fermi gas

abstract:
  We simulate a balanced attractively interacting two-component Fermi gas in a
one-dimensional lattice perturbed with a moving potential well or barrier.
Using the time-evolving block decimation method, we study different velocities
of the perturbation and distinguish two velocity regimes based on clear
differences in the time evolution of particle densities and the pair
correlation function. We show that, in the slow regime, the densities deform as
particles are either attracted by the potential well or repelled by the
barrier, and a wave front of hole or particle excitations propagates at the
maximum group velocity. Simultaneously, the initial pair correlations are
broken and coherence over different sites is lost. In contrast, in the fast
regime, the densities are not considerably deformed and the pair correlations
are preserved.


title:
HJB equations in infinite dimension with locally Lipschitz Hamiltonian
  and unbounded terminal condition

abstract:
  We study Hamilton Jacobi Bellman equations in an infinite dimensional Hilbert
space, with Lipschitz coefficients, where the Hamiltonian has superquadratic
growth with respect to the derivative of the value function, and the final
condition is not bounded. This allows to study stochastic optimal control
problems for suitable controlled state equations with unbounded control
processes. The results are applied to a controlled wave equation.


title:
Star-forming regions and the metallicity gradients in the tidal tails:
  The case of NGC 92

abstract:
  We present new Gemini/GMOS spectroscopic and archival imaging data of the
interacting galaxy NGC 92, which is part of a compact group and displays an
extended tidal tail. We have studied the physical properties of 20 star-forming
complexes in this system. We found that the star-forming regions located in the
tidal tail of NGC 92 have ages younger than 8 Myr, which suggests that these
objects were formed in situ. The spectroscopic data reveals that these regions
have slightly sub-solar metallicities, suggesting that they were formed from
pre-enriched material. Using the oxygen abundances derived for each system, we
found that the extended tidal tail of NGC 92 has a flat metallicity
distribution. Although this scenario is consistent with N-body simulations of
interacting systems, where there is gas mixing triggered by the interaction,
archival Halpha Fabry-Perot data cubes of NGC 92 have not shown a velocity
gradient along the tail of this galaxy, which under certain assumptions could
be interpreted as a lack of gas flow in the tail. Our results suggest that a
fraction of the enriched gas that was originally located in the center of the
galaxy was expelled into the tidal tail when the interacting process that
formed the tail happened. However, we can not exclude the scenario in which the
star formation in the tail has increased its original oxygen abundance.


title: Sparse hypergraphs with low independence number

abstract:
  Let K_4 denote the complete 3-uniform hypergraph on 4 vertices. Ajtai,
Erd\H{o}s, Koml\'os, and Szemer\'edi (1981) asked if there is a function
\omega(d) tending to infinity such that every 3-uniform, K_4-free hypergraph N
vertices and average degree d has independence number at least \omega(d)
N/d^{1/2}. We answer this question by constructing a 3-uniform, K_4-free
hypergraph with independence number at most 2N/d^{1/2}. We also provide
counterexamples to several related conjectures and improve the lower bound of
some hypergraph Ramsey numbers.


title: Matrix Models and Large-N Behavior

abstract:
  Following the procedures by which O(N)-invariant real vector models and their
large-N behavior have previously been solved, we extend similar techniques to
the study of real symmetric N x N-matrix models with O(N)-invariant
interactions. Proper extensions to N equal infinity are also established. While
no 1/N-expansions are involved in our analysis, a brief comparison of our
procedures with traditional 1/N-expansion procedures is given.


title: Effect of isoelectronic doping on honeycomb lattice iridate A_2IrO_3

abstract:
  We have investigated experimentally and theoretically the series
(Na$_{1-x}$Li$_{x}$)$_{2}$IrO$_{3}$. Contrary to what has been believed so far,
only for $x\leq0.25$ the system forms uniform solid solutions. For larger Li
content, as evidenced by powder X-ray diffraction, scanning electron microscopy
and density functional theory calculations, the system shows a miscibility gap
and a phase separation into an ordered Na$_{3}$LiIr$_2$O$_{6}$ phase with
alternating Na$_3$ and LiIr$_2$O$_6$ planes, and a Li-rich phase close to pure
Li$_{2}$IrO$_{3}$. For $x\leq 0.25$ we observe (1) an increase of $c/a$ with Li
doping up to $x=0.25$, despite the fact that $c/a$ in pure Li$_{2}$IrO$_{3}$ is
smaller than in Na$_{2}$IrO$_{3}$, and (2) a gradual reduction of the
antiferromagnetic ordering temperature $T_{N}$ and ordered moment. The
previously proposed magnetic quantum phase transition at $x\approx 0.7$ may
occur in a multiphase region and its nature needs to be re-evaluated.


title: Vectorising the detector geometry to optimize particle transport

abstract:
  Among the components contributing to particle transport, geometry navigation
is an important consumer of CPU cycles. The tasks performed to get answers to
"basic" queries such as locating a point within a geometry hierarchy or
computing accurately the distance to the next boundary can become very
computing intensive for complex detector setups. So far, the existing geometry
algorithms employ mainly scalar optimisation strategies (voxelization, caching)
to reduce their CPU consumption. In this paper, we would like to take a
different approach and investigate how geometry navigation can benefit from the
vector instruction set extensions that are one of the primary source of
performance enhancements on current and future hardware. While on paper, this
form of microparallelism promises increasing performance opportunities,
applying this technology to the highly hierarchical and multiply branched
geometry code is a difficult challenge. We refer to the current work done to
vectorise an important part of the critical navigation algorithms in the ROOT
geometry library. Starting from a short critical discussion about the
programming model, we present the current status and first benchmark results of
the vectorisation of some elementary geometry shape algorithms. On the path
towards a full vector-based geometry navigator, we also investigate the
performance benefits in connecting these elementary functions together to
develop algorithms which are entirely based on the flow of vector-data. To this
end, we discuss core components of a simple vector navigator that is tested and
evaluated on a toy detector setup.


title:
Influence of the cosmic repulsion on the MOND model of the Magellanic
  Cloud motion in the field of Milky Way

abstract:
  It has been recently shown that the cosmic repulsion can have a highly
significant influence on the motion of Magellanic Clouds (MC) in the
gravitational field of Milky Way, treated in the framework of the Cold Dark
Matter (CDM) halo model. However, there is an alternative to the CDM halo
explanation of the rotation curves in the periphery of spiral galaxies, based
on MOdified Newtonian Dynamics (MOND). Therefore, we study the role of the
cosmic repulsion in the framework of the MOND theory applied to determine the
MC motion. Our results demonstrate that in the MOND framework the influence of
the cosmic repulsion on the motion of both Small and Large MC is also highly
significant, but it is of a different character than in the framework of the
CDM halo model. Moreover, we demonstrate that the MC motion in the framework of
the CDM halo and MOND models is subtantially different and can serve as a test
of these fundamentally different approaches to the explanation of the phenomena
related to galaxies and the motion of satellite galaxies.


title:
An It\^o's type formula for the fractional Brownian motion in Brownian
  time

abstract:
  Let $X$ be a (two-sided) fractional Brownian motion of Hurst parameter $H\in
(0,1)$ and let $Y$ be a standard Brownian motion independent of $X$. Fractional
Brownian motion in Brownian motion time (of index $H$), recently studied in
\cite{13}, is by definition the process $Z=X\circ Y$. It is a continuous,
non-Gaussian process with stationary increments, which is selfsimilar of index
$H/2$. The main result of the present paper is an It\^{o}'s type formula for
$f(Z_t)$, when $f:\R\to\R$ is smooth and $H\in [1/6,1)$. When $H>1/6$, the
change-of-variable formula we obtain is similar to that of the classical
calculus. In the critical case $H=1/6$, our change-of-variable formula is in
law and involves the third derivative of $f$ as well as an extra Brownian
motion independent of the pair $(X,Y)$. We also discuss briefly the case
$H<1/6$.


title: Polariton boxes in a tunable fiber cavity

abstract:
  Cavity-polaritons in semiconductor photonic structures have emerged as a test
bed for exploring non-equilibrium dynamics of quantum fluids in an integrated
solid-state device setting. Several recent experiments demonstrated the
potential of these systems for revealing quantum many-body physics in
driven-dissipative systems. So far, all experiments have relied on fully
integrated devices with little to no flexibility for modification of device
properties. Here, we present a novel approach for realizing confined
cavity-polaritons that enables in-situ tuning of the cavity length and thereby
of the polariton energy and lifetime. Our setup is based on a versatile
semi-integrated low-temperature fiber-cavity platform, which allows us to
demonstrate the formation of confined polaritons (or polariton boxes) with
unprecedented quality factors. At high pump powers, we observe clear signatures
of polariton lasing. In the strong-confinement limit, the fiber-cavity system
could enable the observation of the polariton-blockade effect.


title: Slow down of the mean multiplicity growth at the LHC

abstract:
  We discuss the possibility of changing the energy dependence of the mean
multiplicity, i.e. slow down of its growth at the LHC energies due to a gradual
transition to the reflecting scattering mode.


title:
Delay-Robustness in Distributed Control of Timed Discrete-Event Systems
  Based on Supervisor Localization

abstract:
  Recently we studied communication delay in distributed control of untimed
discrete-event systems based on supervisor localization. We proposed a property
called delay-robustness: the overall system behavior controlled by distributed
controllers with communication delay is logically equivalent to its delay-free
counterpart. In this paper we extend our previous work to timed discrete-event
systems, in which communication delays are counted by a special clock event
{\it tick}. First, we propose a timed channel model and define timed
delay-robustness; for the latter, a polynomial verification procedure is
presented. Next, if the delay-robust property does not hold, we introduce
bounded delay-robustness, and present an algorithm to compute the maximal delay
bound (measured by number of ticks) for transmitting a channeled event.
Finally, we demonstrate delay-robustness on the example of an under-load
tap-changing transformer.


title:
Homogeneous ice nucleation at moderate supercooling from molecular
  simulation

abstract:
  Among all the freezing transitions, that of water into ice is probably the
most relevant to biology, physics, geology or atmospheric science. In this work
we investigate homogeneous ice nucleation by means of computer simulations. We
evaluate the size of the critical cluster and the nucleation rate for
temperatures ranging between 15K and 35K below melting. We use the TIP4P/2005
and the TIP4P/Ice water models. Both give similar results when compared at the
same temperature difference with the model's melting temperature. The size of
the critical cluster varies from $\sim$8000 molecules (radius$ = 4$nm) at 15K
below melting to $\sim$600 molecules (radius$ = 1.7$nm) at 35K below melting.
We use Classical Nucleation Theory (CNT) to estimate the ice-water interfacial
free energy and the nucleation free energy barrier. We obtain an interfacial
free energy of 29(3)mN/m from an extrapolation of our results to the melting
temperature. This value is in good agreement both with experimental
measurements and with previous estimates from computer simulations of
TIP4P-like models. Moreover, we obtain estimates of the nucleation rate from
simulations of the critical cluster at the barrier top. The values we get for
both models agree within statistical error with experimental measurements. At
temperatures higher than 20K below melting we get nucleation rates slower than
the appearance of a critical cluster in all the water of the hydrosphere in the
age of the universe. Therefore, our simulations predict that water freezing
above this temperature must necessarily be heterogeneous.


title: Sutured Floer homology, fibrations, and taut depth one foliations

abstract:
  For an oriented irreducible 3-manifold M with non-empty toroidal boundary, we
describe how sutured Floer homology ($SFH$) can be used to determine all
fibered classes in $H^1(M)$. Furthermore, we show that the $SFH$ of a balanced
sutured manifold $(M,\gamma)$ detects which classes in $H^1(M)$ admit a taut
depth one foliation such that the only compact leaves are the components of
$R(\gamma)$. The latter had been proved earlier by the first author under the
extra assumption that $H_2(M)=0$. The main technical result is that we can
obtain an extremal $\text{Spin}^c$-structure $\mathfrak{s}$ (i.e., one that is
in a `corner' of the support of $SFH$) via a nice and taut sutured manifold
decomposition even when $H_2(M) \neq 0$, assuming the corresponding group
$SFH(M,\gamma,\mathfrak{s})$ has non-trivial Euler characteristic.


title: Schur-Weyl duality for the unitary groups of $II_1$-factors

abstract:
  We obtain the analogue of Schur-Weyl duality for the unitary group of an
arbitrary ${\rm II}_1$-factor


title:
FRANTIC: A Fast Reference-based Algorithm for Network Tomography via
  Compressive Sensing

abstract:
  We study the problem of link and node delay estimation in undirected networks
when at most k out of n links or nodes in the network are congested. Our
approach relies on end-to-end measurements of path delays across pre-specified
paths in the network. We present a class of algorithms that we call FRANTIC.
The FRANTIC algorithms are motivated by compressive sensing; however, unlike
traditional compressive sensing, the measurement design here is constrained by
the network topology and the matrix entries are constrained to be positive
integers. A key component of our design is a new compressive sensing algorithm
SHO-FA-INT that is related to the prior SHO-FA algorithm for compressive
sensing, but unlike SHO-FA, the matrix entries here are drawn from the set of
integers {0, 1, ..., M}. We show that O(k log n /log M) measurements suffice
both for SHO-FA-INT and FRANTIC. Further, we show that the computational
complexity of decoding is also O(k log n/log M) for each of these algorithms.
Finally, we look at efficient constructions of the measurement operations
through Steiner Trees.


title: A Massive Quasi-normal Mode in the Holographic Lifshitz Theory

abstract:
  We investigate the holographic renormalization of the
Einstein-Maxwell-dilaton theory which provides an asymptotic Lifshitz geometry
dual to a Lifshitz field theory. In this case, the existence of a field
combination with zero scaling dimension causes an ambiguity in fixing local
counter terms. Nevertheless, we show that all possible local counter terms give
rise to consistent thermodynamic quantities with the Lifshitz black brane
results. In addition, we also study the retarded Green functions of the current
and momentum operator of a non-relativistic Lifshitz field theory. In the
non-zero momentum regime, the results show intriguingly that there exists a
massive quasi-normal mode whose effective mass is linearly proportional to
temperature and that even at zero temperature there exists a quasi-normal mode
in the non-relativistic Lifshitz medium.


title: Smooth Hamiltonian systems with soft impacts

abstract:
  In a Hamiltonian system with impacts (or "billiard with potential"), a point
particle moves about the interior of a bounded domain according to a background
potential, and undergoes elastic collisions at the boundaries. When the
background potential is identically zero, this is the hard-wall billiard model.
Previous results on smooth billiard models (where the hard-wall boundary is
replaced by a steep smooth billiard-like potential) have clarified how the
approximation of a smooth billiard with a hard-wall billiard may be utilized
rigorously. These results are extended here to models with smooth background
potential satisfying some natural conditions. This generalization is then
applied to geometric models of collinear triatomic chemical reactions (the
models are far from integrable $n$-degree of freedom systems with $n\geq2$).
The application demonstrates that the simpler analytical calculations for the
hard-wall system may be used to obtain qualitative information with regard to
the solution structure of the smooth system and to quantitatively assist in
finding solutions of the soft impact system by continuation methods. In
particular, stable periodic triatomic configurations are easily located for the
smooth highly-nonlinear two and three degree of freedom geometric models.


title:
Nucleon generalized form factors and sigma term from lattice QCD near
  the physical quark mass

abstract:
  We present new N_f=2 data for the nucleon generalized form factors, varying
volume, lattice spacing and pion mass, down to 150 MeV. We also give an update
of our direct calculation of the nucleon sigma term for a range of pion mass
values including the lightest one.


title: Proximity-induced superconductivity effect in a double-stranded DNA

abstract:
  We study the proximity-induced superconductivity effect in a double-stranded
DNA by solving the Bogoliubov-de Gennes equations and taking into account the
effect of thermal fluctuations of the twist angle between neighboring base
pairs. We show that the electron conductance is spin-dependent and the
conductance of spin up (down) increases (decreases) due to the spin-orbit
coupling. It is found that, for T<100K, the band gap energy is
temperature-independent and it decreases due to the SOC. In addition, by
solving the Bogoliubov-de Gennes equations and local gap parameter equation
self-consistently, we find the critical temperature at which transition to
superconductivity can take place.


title: Decoherence enhanced quantum measurement of a quantum dot spin qubit

abstract:
  We study the effect of phonons on a proposed scheme for the direct
measurement of two-electron spin states in a double quantum dot by monitoring
the the noise of the current flowing through a quantum point contact coupled to
one of the dots. We show that although the effect of phonons is damaging to the
procedure at extremely low temperatures characteristic of spin-in-quantum-dots
experiments, and may even be fatal, increasing the temperature leads to a
revival of the schemes usefulness. Furthermore, at higher, but still reasonably
low temperatures phonon effects become advantageous to the measurement scheme,
and lead to the enhancement of the spin-singlet noise without disturbing the
low spin-triplet noise. Hence, the uncontrollable interaction of the measured
system with the open bosonic environment, can be harnessed to increase the
distinguishability between the measured states.


title: How to commute

abstract:
  A simple exposition of the rarely discussed fact that a set of free boson
fields describing different, i.e. kinematically different particle types can be
quantized with mutual anticommutation relations is given by the explicit
construction of the Klein transformations changing anticommutation relations
into commutation relations. The q-analog of the presented results is also
treated. The analogous situation for two independent free fermion fields with
mutual commutation or anticommutation relations is briefly investigated.


title:
Pion properties at finite nuclear density based on in-medium chiral
  perturbation theory

abstract:
  The in-medium pion properties, {\it i.e.} the temporal pion decay constant
$f_t$, the pion mass $m_\pi^*$ and the wave function renormalization, in
symmetric nuclear matter are calculated in an in-medium chiral perturbation
theory up to the next-to-leading order of the density expansion $O(k_F^4)$. The
chiral Lagrangian for the pion-nucleon interaction is determined in vacuum, and
the low energy constants are fixed by the experimental observables. We
carefully define the in-medium state of the pion and find that the pion wave
function plays an essential role for the in-medium pion properties. We show
that the linear density correction is dominated and the next-leading
corrections is not so large at the saturation density, while their
contributions can be significant in higher densities. The main contribution of
the next-leading order comes from the double scattering term. We also discuss
whether the low energy theorems, the Gell-Mann--Oakes--Renner relation and the
Glashow--Weinberg relation, are satisfied in nuclear medium beyond the linear
density approximation. We find also that the wave function renormalization is
enhanced as largely as $50\%$ at the saturation density including the
next-leading contribution and the wave function renormalization could be
measured in the in-medium $\pi^0\to \gamma\gamma$ decay.


title:
On weighted norm inequalities for the Carleson and Walsh-Carleson
  operators

abstract:
  We prove $L^p(w)$ bounds for the Carleson operator ${\mathcal C}$, its
lacunary version $\mathcal C_{lac}$, and its analogue for the Walsh series $\W$
in terms of the $A_q$ constants $[w]_{A_q}$ for $1\le q\le p$. In particular,
we show that, exactly as for the Hilbert transform, $\|{\mathcal C}\|_{L^p(w)}$
is bounded linearly by $[w]_{A_q}$ for $1\le q<p$.
  We also obtain $L^p(w)$ bounds in terms of $[w]_{A_p}$, whose sharpness is
related to certain conjectures (for instance, of Konyagin \cite{K2}) on
pointwise convergence of Fourier series for functions near $L^1$.
  Our approach works in the general context of maximally modulated
Calder\'on-Zygmund operators.


title:
A Generalization of Correspondence Theorem and Its Application to
  Branching Laws

abstract:
  We begin with recalling the correspond theorem of induced modules and global
sections of vector bundles. After that, we give a generalization of this
theorem. Finally, we apply the result to branching laws, and give some concrete
examples.


title: The Eyring-Kramers law for Markovian jump processes with symmetries

abstract:
  We prove an Eyring-Kramers law for the small eigenvalues and mean
first-passage times of a metastable Markovian jump process which is invariant
under a group of symmetries. Our results show that the usual Eyring-Kramers law
for asymmetric processes has to be corrected by a factor computable in terms of
stabilisers of group orbits. Furthermore, the symmetry can produce additional
Arrhenius exponents and modify the spectral gap. The results are based on
representation theory of finite groups.


title:
The consistency of estimator under fixed design regression model with
  NQD errors

abstract:
  In this article, basing on NQD samples, we investigate the fixed design
nonparametric regression model, where the errors are pairwise NQD random
errors, with fixed design points, and an unknown function. Nonparametric
weighted estimator will be introduced and its consistency is studied. As
special case, the consistency result for weighted kernel estimators of the
model is obtained. This extends the earlier work on independent random and
dependent random errors to NQD case.


title:
Higher-order soft and Coulomb corrections to squark and gluino
  production at the LHC

abstract:
  We present predictions for the total cross sections for pair production of
squarks and gluinos at the LHC including a combined NNLL resummation of soft
and Coulomb gluon effects. The NNLL corrections can be up to 25% relative to
previous NLL results and reduce the theoretical uncertainties to the 10% level.


title:
An identification of Lusztig's modified forms of quantum algebras and
  their analogues

abstract:
  We introduce a multi-parameter twisted Hopf algebra associated with a root
datum and show that its modified form is isomorphic to Lusztig's modified
quantum algebra under certain restrictions on the parameters. By taking various
specializations of the parameters, we obtain similar results for
two/multi-parameter quantum algebras and Kang-Kashiwara-Oh's multi-parameter
quantum superalgebras. As a consequence, the categories of weight modules of
these algebras are identical.


title: Quantumness of correlations in indistinguishable particles

abstract:
  We discuss a general notion of quantum correlations in fermionic or bosonic
indistinguishable particles. Our approach is mainly based on the identification
of the algebra of single-particle observables, which allows us to devise an
activation protocol in which the \textit{quantumness of correlations} in the
system leads to a unavoidable creation of entanglement with the measurement
apparatus. Using the distillable entanglement, or the relative entropy of
entanglement, as entanglement measure, we show that our approach is equivalent
to the notion of minimal disturbance in a single-particle von Neumann
measurement, also leading to a geometrical approach for its quantification.


title: Most Probably Intersecting Hypergraphs

abstract:
  The celebrated Erd\H{o}s-Ko-Rado theorem shows that for $n \ge 2k$ the
largest intersecting $k$-uniform set family on $[n]$ has size
$\binom{n-1}{k-1}$. It is natural to ask how far from intersecting larger set
families must be. Katona, Katona and Katona introduced the notion of most
probably intersecting families, which maximise the probability of random
subfamilies being intersecting.
  We study the most probably intersecting problem for $k$-uniform set families.
We provide a rough structural characterisation of the most probably
intersecting families and, for families of particular sizes, show that the
initial segment of the lexicographic order is optimal.


title:
Combining Simulated Annealing and Monte Carlo Tree Search for Expression
  Simplification

abstract:
  In many applications of computer algebra large expressions must be simplified
to make repeated numerical evaluations tractable. Previous works presented
heuristically guided improvements, e.g., for Horner schemes. The remaining
expression is then further reduced by common subexpression elimination. A
recent approach successfully applied a relatively new algorithm, Monte Carlo
Tree Search (MCTS) with UCT as the selection criterion, to find better variable
orderings. Yet, this approach is fit for further improvements since it is
sensitive to the so-called exploration-exploitation constant $C_p$ and the
number of tree updates $N$. In this paper we propose a new selection criterion
called Simulated Annealing UCT (SA-UCT) that has a dynamic
exploration-exploitation parameter, which decreases with the iteration number
$i$ and thus reduces the importance of exploration over time. First, we provide
an intuitive explanation in terms of the exploration-exploitation behavior of
the algorithm. Then, we test our algorithm on three large expressions of
different origins. We observe that SA-UCT widens the interval of good initial
values $C_p$ where best results are achieved. The improvement is large (more
than a tenfold) and facilitates the selection of an appropriate $C_p$.


title: Invariants of degree 3 and torsion in the Chow group of a versal flag

abstract:
  We prove that the group of normalized cohomological invariants of degree 3
modulo the subgroup of semidecomposable invariants of a semisimple split linear
algebraic group G is isomorphic to the torsion part of the Chow group of
codimension 2 cycles of the respective versal G-flag. In particular, if G is
simple, we show that this factor group is isomorphic to the group of
indecomposable invariants of G. As an application, we construct nontrivial
cohomological classes for indecomposable central simple algebras.


title:
The two-weight inequality for the Hilbert transform with general
  measures

abstract:
  The two-weight inequality for the Hilbert transform is characterized for an
arbitrary pair of positive Radon measures $\sigma$ and $w$ on $\mathbb R$. In
particular, the possibility of common point masses is allowed, lifting a
restriction from the recent solution of the two-weight problem by Lacey,
Sawyer, Shen and Uriarte-Tuero. Our characterization is in terms of Sawyer-type
testing conditions and a variant of the two-weight $A_2$ condition, where
$\sigma$ and $w$ are integrated over complementary intervals only. A key novely
of the proof is a two-weight inequality for the Poisson integral with `holes'.


title: Appearance of Mobility Edge in Self-Dual Quasiperiodic Lattices

abstract:
  Within the framework of the Aubry-Andre model, one kind of self-dual
quasiperiodic lattice, it is known that a sharp transition occurs from
\emph{all} eigenstates being extended to \emph{all} being localized. The common
perception for this type of quasiperiodic lattice is that the self-duality
excludes the appearance of the mobility edge separating localized from extended
states. In this work, we propose a multi-chromatic quasiperiodic lattice model
retaining the self-duality identical to the Aubry-Andre model, and demonstrate
numerically the occurrence of the localization-delocalization transition with
definite mobility edges. This contrasts with the Aubry-Andre model. As a
result, the diffusion of wave packet exhibits a transition from ballistic to
diffusive motion, and back to ballistic motion. We point out that experimental
realizations of the predicted transition can be accessed with light waves in
photonic lattices and matter waves in optical lattices.


title:
Covariant Map Between Ramond-Neveu-Schwarz and Pure Spinor Formalisms
  for the Superstring

abstract:
  A covariant map between the Ramond-Neveu-Schwarz (RNS) and pure spinor
formalisms for the superstring is found which transforms the RNS and pure
spinor BRST operators into each other. The key ingredient is a dynamical
twisting of the ten spin-half RNS fermions into five spin-one and five
spin-zero fermions using bosonic pure spinors that parameterize an SO(10)/U(5)
coset. The map relates massless vertex operators in the two formalisms, and
gives a new description of Ramond states which does not require spin fields. An
argument is proposed for relating the amplitude prescriptions in the two
formalisms.


title: Generalized forms and gravitation

abstract:
  The algebra and calculus of generalized differential forms are reviewed and
employed to construct a class of generalized connections and to investigate
their properties. The class includes generalized connections which are flat
when Einstein's vacuum field equations are satisfied. Generalized Chern-Simons
action principles are formulated and it is shown that certain of these have
Einstein's vacuum field equations as Euler-Lagrange equations.


title:
Temperature and Magnetic Field Dependence of Spin Ice Correlations in
  the Pyrochlore Magnet Tb2Ti2O7

abstract:
  We present a parametric study of the diffuse magnetic scattering at
(1/2,1/2,1/2) positions in reciprocal space, ascribed to a frozen
antiferromagnetic spin ice state in single crystalline Tb2Ti2O7. Our
high-resolution neutron scattering measurements show that the elastic (-0.02
meV < E < 0.02 meV) (1/2,1/2,1/2) scattering develops strongly below ~275 mK,
and correlates with the opening of a spin gap of ~0.06-0.08 meV over most of
the Brillouin zone. The concomitant low-lying magnetic spin excitations are
weakly dispersive and appear to soften near the (1/2,1/2,1/2) wave vector at 80
mK. The nature of the transition at 275 mK has many characteristics of spin
glass behavior, consistent with ac-susceptibility measurements. The application
of a magnetic field of 0.075 T applied along the [1-10] direction destroys the
(1/2,1/2,1/2) elastic scattering, revealing the fragility of this short-range
ordered ground state. We construct a refined H-T phase diagram for Tb2Ti2O7 and
[1-10] fields which incorporates this frozen spin ice regime and the
antiferromagnetic long-range order previously known to be induced in relatively
large fields. Specific heat measurements on the same crystal reveal a sharp
anomaly at Tc~450 mK and no indication of a transition near ~275 mK. We
conclude that the higher temperature specific heat peak is not related to the
magnetic ordering but is likely a signal of other, nonmagnetic, correlations.


title: $G$-minimality and invariant negative spheres in $G$-Hirzebruch surfaces

abstract:
  In this paper a study of $G$-minimality, i.e., minimality of four-manifolds
equipped with an action of a finite group $G$, is initiated. We focus on cyclic
actions on $CP^2\# \overline{CP^2}$, and our work shows that even in this
simple setting, the comparison of $G$-minimality in the various categories,
i.e., locally linear, smooth, and symplectic, is already delicate and
interesting. For example, we show that if a symplectic $Z_n$-action on $CP^2\#
\overline{CP^2}$ has an invariant locally linear topological $(-1)$-sphere,
then it must admit an invariant symplectic $(-1)$-sphere, provided that $n=2$
or $n$ is odd. For the case where $n>2$ and even, the same conclusion holds
under a stronger assumption, i.e., the invariant $(-1)$-sphere is smoothly
embedded. Along the way of these proofs we develop certain techniques for
producing embedded invariant $J$-holomorphic two-spheres of self-intersection
$-r$ under a weaker assumption of an invariant smooth $(-r)$-sphere for $r$
relatively small compared with the group order $n$. We then apply the
techniques to give a classification of $G$-Hirzebruch surfaces (i.e.,
Hirzebruch surfaces equipped with a homologically trivial, holomorphic
$G=Z_n$-action) up to orientation-preserving equivariant diffeomorphisms. The
main issue of the classification is to distinguish non-diffeomorphic
$G$-Hirzebruch surfaces which have the same fixed-point set structure. An
interesting discovery is that these non-diffeomorphic $G$-Hirzebruch surfaces
have distinct equivariant Gromov-Taubes invariant, giving the first examples of
such kind. Going back to the original question of $G$-minimality, we show that
for $G=Z_n$, a minimal rational $G$-surface is minimal as a symplectic
$G$-manifold if and only if it is minimal as a smooth $G$-manifold.


title: Conformal Fibrations of $S^3$ by Circles

abstract:
  It is shown that analytic conformal submersions of $S^3$ are given by
intersections of (not necessary closed) complex surfaces with a quadratic real
hyper-surface in $\mathbb{C}P^3.$ A new description of the space of circles in
the 3-sphere in terms of a natural bilinear form on the tangent sphere bundle
of $S^3$ is given. As an application it is shown that every conformal fibration
of $S^3$ by circles is the Hopf fibration up to conformal transformations.


title:
Shearer's point process, the hard-sphere model and a continuum Lov\'asz
  Local Lemma

abstract:
  A point process is R-dependent, if it behaves independently beyond the
minimum distance R. This work investigates uniform positive lower bounds on the
avoidance functions of R-dependent simple point processes with a common
intensity. Intensities with such bounds are described by the existence of
Shearer's point process, the unique R-dependent and R-hard-core point process
with a given intensity. This work also presents several extensions of the
Lov\'asz Local Lemma, a sufficient condition on the intensity and R to
guarantee the existence of Shearer's point process and exponential lower
bounds. Shearer's point process shares combinatorial structure with the
hard-sphere model with radius R, the unique R-hard-core Markov point process.
Bounds from the Lov\'asz Local Lemma convert into lower bounds on the radius of
convergence of a high-temperature cluster expansion of the hard-sphere model.
This recovers a classic result of Ruelle on the uniqueness of the Gibbs measure
of the hard-sphere model via an inductive approach \`a la Dobrushin.


title: Predicting distributions of invasive species

abstract:
  This chapter aims to inform a practitioner about current methods for
predicting potential distributions of invasive species. It mostly addresses
single species models, covering the conceptual bases, touching on mechanistic
models, and then focusing on methods using species distribution records and
environmental data to predict distributions. The commentary in this last
section is oriented towards key issues that arise in fitting, and predicting
with, these models (which include CLIMEX, MaxEnt and other regression methods).
In other words, it is more about the process of thinking about the data and the
modelling problem (which is a challenging one) than it is about one technique
versus another. The discussion helps clarify the necessary steps and expertise
for predicting distributions. Some researchers are optimistic that correlative
models will predict with high precision; while that may be true for some
species at some scales of evaluation, I believe that the issues discussed in
this chapter show that substantial errors are reasonably likely. I am hopeful
that ongoing developments will produce models better suited to the task and
tools to help practitioners to better understand predictions and their
uncertainties.


title: Feature Extraction of Human Lip Prints

abstract:
  Methods have been used for identification of human by recognizing lip prints.
Human lips have a number of elevation and depressions features called lip
prints and examination of lip prints is referred to as cheiloscopy. Lip prints
of each human being are unique in nature like many others features of human. In
this paper lip print is first smoothened using a Gaussian Filter. Next Sobel
Edge Detector and Canny Edge Detector are used to detect the vertical and
horizontal groove pattern in the lip. This method of identification will be
useful both in criminal forensics and personal identification. It is our
assumption that study of lip prints and their types are well connected to play
a song in a better way that are well accepted to people who loves to hear
songs.


title:
A pinned or free-floating plate on a thin viscous film. Part 1: A rigid
  plate

abstract:
  A pinned or free-floating rigid plate lying on the free surface of a thin
film of viscous fluid, which itself lies on top of a horizontal substrate that
is moving to the right at a constant speed is considered. The focus of the
present work is to describe how the competing effects of the speed of the
substrate, surface tension, viscosity, and, in the case of a pinned plate, the
prescribed pressure in the reservoir of fluid at its upstream end, determine
the possible equilibrium positions of the plate, the free surface, and the flow
within the film. The present problems are of interest both in their own right
as paradigms for a range of fluid-structure interaction problems in which
viscosity and surface tension both play an important role, and as a first step
towards the study of elastic effects.


title: Single-Molecule-Sensitive FRET in Freely-Diffusing Attoliter Droplets

abstract:
  Fluorescence resonance energy transfer (FRET) from individual, dye-labeled
RNA molecules confined in freely-diffusing attoliter-volume aqueous droplets is
carefully compared to FRET from unconfined RNA in solution. The use of
freely-diffusing droplets is a remarkably simple and high-throughput technique
that facilitates a substantial increase in signal-to-noise for
single-molecular-pair FRET measurements. We show that there can be dramatic
differences between FRET in solution and in droplets, which we attribute
primarily to an altered pH in the confining environment. We also demonstrate
that a sufficient concentration of a non-ionic surfactant mitigates this effect
and restores FRET to its neutral-pH solution value. At low surfactant levels,
even accounting for pH, we observe differences between the distribution of FRET
values in solution and in droplets which remain unexplained. Our results will
facilitate the use of nanoemulsion droplets as attoliter volume reactors for
use in biophysical and biochemical assays, and also in applications such as
protein crystallization or nanoparticle synthesis, where careful attention to
the pH of the confined phase is required.


title:
On everywhere divergence of the strong $\Phi$-means of Walsh-Fourier
  series

abstract:
  Almost everywhere strong exponential summability of Fourier series in Walsh
and trigonometric systems established by Rodin in 1990. We prove, that if the
growth of a function $\Phi(t):[0,\infty)\to[0,\infty)$ is bigger than the
exponent, then the strong $\Phi$-summability of a Walsh-Fourier series can fail
everywhere. The analogous theorem for trigonometric system was proved before by
one of the author of this paper.


title:
GRASIL-3D: an Implemention of Dust Effects in the SEDs of Simulated
  Galaxies

abstract:
  We introduce a new model for the spectral energy distribution of galaxies,
GRASIL-3D, which includes a careful modelling of the dust component of the
interstellar medium. GRASIL-3D is an entirely new model based on the formalism
of an existing and widely applied spectrophotometric model, GRASIL, but
specifically designed to be interfaced with galaxies with any arbitrarily given
geometry, such as galaxies calculated by theoretical hydrodynamical galaxy
formation codes. GRASIL-3D is designed to separately treat radiative transfer
in molecular clouds and in the diffuse cirrus component. The code has a general
applicability to the outputs of simulated galaxies, either from Lagrangian or
Eulerian hydrodynamic codes. As an application, the new model has been
interfaced to the P-DEVA and GASOLINE smoothed-particle hydrodynamic codes, and
has been used to calculate the spectral energy distribution for a variety of
simulated galaxies from UV to sub-millimeter wavelengths, whose comparison with
observational data gives encouraging results. In addition, GRASIL-3D allows 2D
images of such galaxies to be obtained, at several angles and in different
bands.


title:
Orbital occupancies and the putative jeff = 1/2 groundstate in Ba2IrO4:
  a combined oxygen K edge XAS and RIXS study

abstract:
  The nature of the electronic groundstate of Ba2IrO4 has been addressed using
soft X-ray absorption and inelastic scattering techniques in the vicinity of
the oxygen K edge. From the polarization and angular dependence of XAS we
deduce an approximately equal superposition of xy, yz and zx Ir4+ 5d orbitals.
By combining the measured orbital occupancies, with the value of the spin-orbit
coupling provided by RIXS, we estimate the crystal field splitting associated
with the tetragonal distortion of the IrO6 octahedra to be small, \Delta=50(50)
meV. We thus conclude definitively that Ba2IrO4 is a close realization of a
spin-orbit Mott insulator with a jeff = 1/2 groundstate, thereby overcoming
ambiguities in this assignment associated with the interpretation of X-ray
resonant scattering experiments.


title: Pretty cleanness and filter-regular sequences

abstract:
  Let $K$ be a field and $S=K[x_1,\ldots, x_n]$. Let $I$ be a monomial ideal of
$S$ and $u_1,\ldots, u_r$ be monomials in $S$ which form a filter-regular
sequence on $S/I$. We show that $S/I$ is pretty clean if and only if
$S/(I,u_1,\ldots, u_r)$ is pretty clean.


title:
Accelerated Failure Time Models for Competing Risks in a Cluster
  Weighted Modelling Framework

abstract:
  A novel approach for dealing with censored competing risks regression data is
proposed. This is implemented by a mixture of accelerated failure time (AFT)
models for a competing risks scenario within a cluster-weighted modelling (CWM)
framework. Specifically, we make use of the log-normal AFT model here but any
commonly used AFT model can be utilized. The alternating expectation
conditional maximization algorithm (AECM) is used for parameter estimation and
bootstrapping for standard error estimation. Finally, we present our results on
some simulated and real competing risks data.


title: Community Specific Temporal Topic Discovery from Social Media

abstract:
  Studying temporal dynamics of topics in social media is very useful to
understand online user behaviors. Most of the existing work on this subject
usually monitors the global trends, ignoring variation among communities. Since
users from different communities tend to have varying tastes and interests,
capturing community-level temporal change can improve the understanding and
management of social content. Additionally, it can further facilitate the
applications such as community discovery, temporal prediction and online
marketing. However, this kind of extraction becomes challenging due to the
intricate interactions between community and topic, and intractable
computational complexity.
  In this paper, we take a unified solution towards the community-level topic
dynamic extraction. A probabilistic model, CosTot (Community Specific
Topics-over-Time) is proposed to uncover the hidden topics and communities, as
well as capture community-specific temporal dynamics. Specifically, CosTot
considers text, time, and network information simultaneously, and well
discovers the interactions between community and topic over time. We then
discuss the approximate inference implementation to enable scalable computation
of model parameters, especially for large social data. Based on this, the
application layer support for multi-scale temporal analysis and community
exploration is also investigated.
  We conduct extensive experimental studies on a large real microblog dataset,
and demonstrate the superiority of proposed model on tasks of time stamp
prediction, link prediction and topic perplexity.


title:
Measuring the transition to homogeneity with photometric redshift
  surveys

abstract:
  We study the possibility of detecting the transition to homogeneity using
photometric redshift catalogs. Our method is based on measuring the fractality
of the projected galaxy distribution, using angular distances, and relies only
on observable quantites. It thus provides a way to test the Cosmological
Principle in a model-independent unbiased way. We have tested our method on
different synthetic inhomogeneous catalogs, and shown that it is capable of
discriminating some fractal models with relatively large fractal dimensions, in
spite of the loss of information due to the radial projection. We have also
studied the influence of the redshift bin width, photometric redshift errors,
bias, non-linear clustering, and surveyed area, on the angular homogeneity
index H2 ({\theta}) in a {\Lambda}CDM cosmology. The level to which an upcoming
galaxy survey will be able to constrain the transition to homogeneity will
depend mainly on the total surveyed area and the compactness of the surveyed
region. In particular, a Dark Energy Survey (DES)-like survey should be able to
easily discriminate certain fractal models with fractal dimensions as large as
D2 = 2.95. We believe that this method will have relevant applications for
upcoming large photometric redshift surveys, such as DES or the Large Synoptic
Survey Telescope (LSST).


title:
Noise-induced quantum coherence in photosynthetic complexes with
  multiple energy transfer pathways

abstract:
  We theoretically investigate exciton relaxation dynamics in molecular
aggregates based on model photosynthetic complexes under various conditions of
incoherent excitation. We show that noise-induced quantum coherence is
generated between spatially-separated exciton states which belong to the same
or different energy transfer pathways, coupled via real and virtual transfer
processes. Such quantum coherence effects may be used to improve
light-harvesting efficiency and to reveal quantum phenomena in biology.


title: Meson-cloud effects in the electromagnetic nucleon structure

abstract:
  We study how the electromagnetic structure of the nucleon is influenced by a
pion cloud. To this aim we make use of a constituent-quark model with
instantaneous confinement and a pion that couples directly to the quarks. To
derive the invariant 1- photon-exchange electron-nucleon scattering amplitude
we employ a Poincar\'e- invariant coupled-channel formulation which is based on
the point-form of relativistic quantum mechanics. We argue that the
electromagnetic nucleon current extracted from this amplitude can be
reexpressed in terms of pure hadronic degrees of freedom with the quark
substructure of the pion and the nucleon being encoded in electromagnetic and
strong vertex form factors. These are form factors of bare particles, i.e.
eigenstates of the pure confinement problem. First numerical results for (bare)
photon-nucleon and pion-nucleon form factors, which are the basic ingredients
of the further calculation, are given for a simple 3-quark wave function of the
nucleon.


title: Magnetization curves of deposited finite spin chains

abstract:
  The characterization and manipulation of deposited magnetic clusters or
molecules on surfaces is a prerequisite for their future utilization. In recent
years techniques like spin-flip inelastic electron tunneling spectroscopy using
a scanning tunneling microscope proved to be very precise in determining e.g.
exchange constants in deposited finite spin chains in the meV range. In this
article we tackle the problem numerically by investigating the transition from
where a pure spin Hamiltonian is sufficient to the point where the interaction
with the surface significantly alters the magnetic properties. To this end we
study the static, i.e. equilibrium impurity magnetization of antiferromagnetic
chains for varying couplings to a conduction electron band of a metal
substrate. We show under which circumstances the screening of a part of the
system enables one to deduce molecular parameters of the remainder from level
crossings in an applied field.


title:
On Approximate Asymptotic Solution of Integral Equations of Collision
  Theory

abstract:
  It is well known that multi-particle integral equations of collision theory,
in general, are not compact. At the same time it has been shown that the motion
of three and four particles is described with consistent integral equations. In
particular, by using identical transformations of the kernel of the
Lipman-Schwinger equation for certain classes of potentials Faddeev obtained
Fredholm type integral equations for three-particle problems $[1]$. The motion
of for bodies is described by equations of Yakubovsky and
Alt-Grassberger-Sandhas-Khelashvili $[2.3]$, which are obtained as a result of
two subsequent transpormations of the kernel of Lipman-Schwinger equation. in
the case of $N>4$ the compactness of multi-particle equations has not been
proven yet. In turn out that for sufficiently high energies the $N$-particle
$\left( {N \ge 3} \right)$ dynamic equations have correct asymptotic solutions
satisfying unitary condition $[4]$. In present paper by using the Heitler
formalism we obtain the results briefly summarized in Ref. [4]. In particular,
on the bases of Heitler's equation [5] a unitary asymptotic solution of the
system of $N$-particle scattering integral equations is found, which represents
a generalization to any number of particles of the result of Ref. $[6]$
obtained for three particles.


title: ARRAKIS: Atlas of Resonance Rings As Known In the S4G

abstract:
  Resonance rings are the consequence of secular evolution processes that
redistribute material and angular momentum in discs. We produced a Catalogue
and an Atlas of the rings detected in the Spitzer Survey of Stellar Structure
in Galaxies (S4G) and to conduct a statistical study of the data in the
Catalogue.
  We traced the contours of rings previously identified by Buta et al. (in
preparation) and fitted them with ellipses. We found the orientation of bars by
studying the galaxy ellipse fits from S4G's Pipeline 4. We used the galaxy
orientation data obtained by S4G's Pipeline 4 to obtain intrinsic ellipticities
and orientations of rings and the bars.
  ARRAKIS contains data on 724 ringed galaxies in the S4G. The frequency of
resonance rings in the S4G is of 16+-1% and 35+-1% for outer and inner
features, respectively. Outer rings are mostly found in Hubble stages -1<=T<=4.
Inner rings are found in a distribution that covers the range -1<=T<=7. We
confirm that outer rings have two preferred orientations, parallel and
perpendicular to the bar. We confirm a tendency for inner rings to be oriented
parallel to the bar, but we find that a significant fraction (~50%) of them
have random orientations with respect to the bar. These misaligned inner rings
are mostly found in late-type galaxies (T>=4). This may be due to spiral modes
decoupled from the bar dominating the Fourier amplitude spectrum at the radius
of the inner ring.
  We find that the fraction of barred galaxies hosting outer (inner) rings is
~1.7 times (~1.3 times) that in unbarred galaxies. The fact that rings are only
mildly favoured by bars suggests that those in unbarred galaxies either formed
due to weak departures from the axisymmetry of the galactic potential or that
they are born because of bars that have been destroyed after the ring
formation.


title: Frustration in Biomolecules

abstract:
  Biomolecules are the prime information processing elements of living matter.
Most of these inanimate systems are polymers that compute their structures and
dynamics using as input seemingly random character strings of their sequence,
following which they coalesce and perform integrated cellular functions. In
large computational systems with a finite interaction-codes, the appearance of
conflicting goals is inevitable. Simple conflicting forces can lead to quite
complex structures and behaviors, leading to the concept of "frustration" in
condensed matter. We present here some basic ideas about frustration in
biomolecules and how the frustration concept leads to a better appreciation of
many aspects of the architecture of biomolecules, and how structure connects to
function. These ideas are simultaneously both seductively simple and perilously
subtle to grasp completely. The energy landscape theory of protein folding
provides a framework for quantifying frustration in large systems and has been
implemented at many levels of description. We first review the notion of
frustration from the areas of abstract logic and its uses in simple condensed
matter systems. We discuss then how the frustration concept applies
specifically to heteropolymers, testing folding landscape theory in computer
simulations of protein models and in experimentally accessible systems.
Studying the aspects of frustration averaged over many proteins provides ways
to infer energy functions useful for reliable structure prediction. We discuss
how frustration affects folding, how a large part of the biological functions
of proteins are related to subtle local frustration effects and how frustration
influences the appearance of metastable states, the nature of binding
processes, catalysis and allosteric transitions. We hope to illustrate how
Frustration is a fundamental concept in relating function to structural
biology.


title:
Rigidity of CR maps between Shilov boundaries of bounded symmetric
  domains

abstract:
  Our goal is to establish what seems to be the first rigidity result for CR
embeddings between Shilov boundaries of bounded symmetric domains of higher
rank. The result states that any such CR embedding is the standard linear
embedding up to CR automorphisms. Our basic assumption extends precisely the
well-known optimal bound for the rank one case. There are no other restrictions
on the ranks, in particular, the difficult case when the target rank is larger
than the source rank is also allowed.


title:
Mean-field yrast spectrum and persistent currents in a two-component
  Bose gas with interaction asymmetry

abstract:
  We analyze the mean-field yrast spectrum of a two-component Bose gas in the
ring geometry with arbitrary interaction asymmetry. Of particular interest is
the possibility that the yrast spectrum develops local minima at which
persistent superfluid flow can occur. By analyzing the mean-field energy
functional, we show that local minima can be found at plane-wave states and
arise when the system parameters satisfy certain inequalities. We then go on to
show that these plane-wave states can be yrast states even when the yrast
spectrum no longer exhibits a local minimum. Finally, we obtain conditions
which establish when the plane-wave states cease to be yrast states. Specific
examples illustrating the roles played by the various interaction asymmetries
are presented.


title:
Competing order in correlated electron systems made simple: Consistent
  fusion of functional renormalization and mean-field theory

abstract:
  We derive an efficient and unbiased method for computing order parameters in
correlated electron systems with competing instabilities. Charge, magnetic and
pairing fluctuations above the energy scale of spontaneous symmetry breaking
are taken into account by a functional renormalization group flow, while the
formation of order below that scale is treated in mean-field theory. The method
captures fluctuation driven instabilities such as $d$-wave superconductivity.
As a first application we study the competition between antiferromagnetism and
superconductivity in the ground state of the two-dimensional Hubbard model.


title:
Design and test of an extremely high resolution Timing Counter for the
  MEG II experiment: preliminary results

abstract:
  The design and tests of Timing Counter elements for the upgrade of the MEG
experiment, MEG II,is presented. The detector is based on several small plates
of scintillator with a Silicon PhotoMultipliers dual-side readout. The
optimisation of the single counter elements (SiPMs, scintillators, geometry) is
described. Moreover, the results obtained with a first prototype tested at the
Beam Test Facility (BTF) of the INFN Laboratori Nazionali di Frascati (LNF) are
presented.


title: Acoustic Invisibility in Turbulent Fluids

abstract:
  Acoustic invisibility of a cloaking system in turbulent uids has been poorly
understood. Here we show that evident scattering would appear in turbulent
wakes owing to the submergence of a classical cloaking device. The inherent
mechanism is explained using our theoretical model, which eventually inspires
us to develop an optimized cloaking approach. Both the near- and far-field
scatted fields are examined using high order computational acoustic methods.
The remarkably low scattering demonstrates the effectiveness of the proposed
acoustic cloaking approach for turbulent uid cases.


title:
Transmission phase of a quantum dot and statistical fluctuations of
  partial-width amplitudes

abstract:
  Experimentally, the phase of the amplitude for electron transmission through
a quantum dot (transmission phase) shows the same pattern between consecutive
resonances. Such universal behavior, found for long sequences of resonances, is
caused by correlations of the signs of the partial-width amplitudes of the
resonances. We investigate the stability of these correlations in terms of a
statistical model. For a classically chaotic dot, the resonance eigenfunctions
are assumed to be Gaussian distributed. Under this hypothesis, statistical
fluctuations are found to reduce the tendency towards universal phase
evolution. Long sequences of resonances with universal behavior only persist in
the semiclassical limit of very large electron numbers in the dot and for
specific energy intervals. Numerical calculations qualitatively agree with the
statistical model but quantitatively are closer to universality.


title:
Comparisons of Predictions from Exact Amplitude-Based Resummation
  Methods with LHC and Cosmological Data

abstract:
  We present the current status of the comparisons with the respective data of
the predictions of our approach of exact amplitude-based resummation in quantum
field theory in two areas of investigation: precision QCD calculations of all
four of us as needed for LHC physics and the resummed quantum gravity
realization by one of us (B.F.L.W.) of Einstein's theory of general relativity
as formulated by Feynman. The agreement between the theoretical predictions and
the data exhibited continues to be encouraging.


title:
Evolution of Thermally Pulsing Asymptotic Giant Branch Stars III. Dust
  production at supersolar metallicities

abstract:
  We extend the formalism presented in our recent calculations of dust ejecta
from the Thermally Pulsing Asymptotic Giant Branch (TP-AGB) phase, to the case
of super-solar metallicity stars. The TP-AGB evolutionary models are computed
with the COLIBRI code. We adopt our preferred scheme for dust growth. For
M-giants, we neglect chemisputtering by H$_2$ molecules and, for C-stars we
assume a homogeneous growth scheme which is primarily controlled by the carbon
over oxygen excess. At super-solar metallicities, dust forms more efficiently
and silicates tend to condense significantly closer to the photosphere (r~1.5
R$_*$) - and thus at higher temperatures and densities - than at solar and
sub-solar metallicities (r~2-3 R$_*$). In such conditions, the hypothesis of
thermal decoupling between gas and dust becomes questionable, while dust
heating due to collisions plays an important role. The heating mechanism delays
dust condensation to slightly outer regions in the circumstellar envelope. We
find that the same mechanism is not significant at solar and sub-solar
metallicities. The main dust products at super-solar metallicities are
silicates. We calculate the total dust ejecta and dust-to-gas ejecta, for
various values of the stellar initial masses and initial metallicities Z=0.04,
0.06. Merging these new calculations with those for lower metallicities it
turns out that, contrary to what often assumed, the total dust-to-gas ejecta of
intermediate-mass stars exhibit only a weak dependence on the initial metal
content.


title: Uniform approximation of the Cox-Ingersoll-Ross process

abstract:
  The Doss-Sussmann (DS) approach is used for uniform simulation of the
Cox-Ingersoll-Ross (CIR) process. The DS formalism allows to express
trajectories of the CIR process through solutions of some ordinary differential
equation (ODE) depending on realizations of a Wiener process involved. By
simulating the first-passage times of the increments of the Wiener process to
the boundary of an interval and solving the ODE, we uniformly approximate the
trajectories of the CIR process. In this respect special attention is payed to
simulation of trajectories near zero. From a conceptual point of view the
proposed method gives a better quality of approximation (from a path-wise point
of view) than standard, or even exact simulation of the SDE at some discrete
time grid.


title:
The intermediate value theorem over a non-Archimedean field via Hensel's
  Lemma

abstract:
  The paper proves that all power series over a maximal ordered Cauchy complete
non-Archimedean field satisfy the intermediate value theorem on every closed
interval. Hensel's Lemma for restricted power series is the main tool of the
proof.


title: Depth dependent magnetization profiles of hybrid exchange springs

abstract:
  We report on the magnetization depth profile of a hybrid exchange spring
system in which a Co/Pd multilayer with perpendicular anisotropy is coupled to
a CoFeB thin film with in-plane anisotropy. The competition between these two
orthogonal anisotropies promotes a strong depth dependence of the magnetization
orientation. The angle of the magnetization vector is sensitive both to the
strength of the individual anisotropies and to the local exchange constant, and
is thus tunable by changing the thickness of the CoFeB layer and by
substituting Ni for Pd in one layer of the Co/Pd stack. The resulting magnetic
depth profiles are directly probed by element specific x-ray magnetic circular
dichroism (XMCD) of the Co, Fe, and Ni layers located at different average
depths. The experimental results are corroborated by micromagnetic simulations.


title:
Prospects of detection of relic antineutrinos by resonant absorption in
  electron capturing nuclei

abstract:
  We consider the possibility of detecting relic anti-neutrinos by their
resonant absorption in a nucleus, which can undergo electron capture. This
possibility appears quite realistic in view of recent developments in Penning
Trap Mass Spectrometry and cryogenic micro-calorimetry.


title: Horizons of semiclassical black holes are cold

abstract:
  We calculate, using our recently proposed semiclassical framework, the
quantum state of the Hawking pairs that are produced during the evaporation of
a black hole (BH). Our framework adheres to the standard rules of quantum
mechanics and incorporates the quantum fluctuations of the collapsing shell
spacetime in Hawking's original calculation, while accounting for back-reaction
effects. We argue that the negative-energy Hawking modes need to be regularly
integrated out; and so these are effectively subsumed by the BH and, as a
result, the number of coherent negative-energy modes $N_{coh}$ at any given
time is parametrically smaller than the total number of the Hawking particles
$N_{total}$ emitted during the lifetime of the BH. We find that $N_{coh}$ is
determined by the width of the BH wavefunction and scales as the square root of
the BH entropy. We also find that the coherent negative-energy modes are
strongly entangled with their positive-energy partners. Previously, we have
found that $N_{coh}$ is also the number of coherent outgoing particles and that
information can be continually transferred to the outgoing radiation at a rate
set by $N_{coh}$. Our current results show that, while the BH is semiclassical,
information can be released without jeopardizing the nearly maximal inside-out
entanglement and imply that the state of matter near the horizon is
approximately the vacuum. The BH firewall proposal, on the other hand, is that
the state of matter near the horizon deviates substantially from the vacuum,
starting at the Page time. We find that, under the usual assumptions for
justifying the formation of a firewall, one does indeed form at the Page time.
However, the possible loophole lies in the implicit assumption that the number
of strongly entangled pairs can be of the same order of $N_{total}$.


title:
Semi-classical approach to $J/\psi$ suppression in high energy heavy-ion
  collisions

abstract:
  We study the heavy quark/antiquark pair dynamics in strongly-coupled quark
gluon plasma. A semi-classical approach, based on the Wigner distribution and
Langevin dynamics, is applied to a color screened $c{\bar c}$ pair, in a
hydrodynamically cooling fireball, to evaluate the total $J/\psi$ suppression
at both RHIC and LHC energies. Although its limitation is observed, this
approach results to a $J/\psi$ suppression of around 0.30 at RHIC and 0.25 at
LHC.


title: On the Throughput of Hybrid-ARQ under QoS Constraints

abstract:
  Hybrid Automatic Repeat Request (HARQ) is a high performance communication
protocol, leading to effective use of the wireless channel and the resources
with only limited feedback about the channel state information (CSI) to the
transmitter. In this paper, the throughput of HARQ with incremental redundancy
(IR) and fixed transmission rate is studied in the presence of quality of
service (QoS) constraints imposed as limitations on buffer overflow
probabilities. In particular, tools from the theory of renewal processes and
stochastic network calculus are employed to characterize the maximum arrival
rates that can be supported by the wireless channel when HARQ-IR is adopted.
Effective capacity is employed as the throughput metric and a closed-form
expression for the effective capacity of HARQ-IR is determined for small values
of the QoS exponent. The impact of the fixed transmission rate, QoS
constraints, and hard deadline limitations on the throughput is investigated
and comparisons with regular ARQ operation are provided.


title:
Impact of Mobile Transmitter Sources on Radio Frequency Wireless Energy
  Harvesting

abstract:
  Wireless energy harvesting sensor networks constitute a new paradigm, where
the motes deployed in the field are no longer constrained by the limited
battery resource, but are able to re-charge themselves through directed
electromagnetic energy transfer. The energy sources, which we call actors, are
mobile and move along pre-decided patterns while radiating an appropriate level
of energy, sufficient enough to charge the sensors at an acceptable rate. This
is the first work that investigates the impact of energy transfer, especially
concerning the energy gain in the sensors, the energy spent by the actors, and
the overall lifetime in the resulting mobile sensor-actor networks. We propose
two event-specific mobility models, where the events occur at the centers of a
Voronoi tessellation, and the actors move along either (i)the edges of the
Voronoi cells, or (ii) directly from one event center to another. We undertake
a comprehensive simulation based study using traces obtained from our
experimental energy harvesting circuits powering Mica2 motes. Our results
reveal several non-intuitive outcomes, and provide guidelines on which mobility
model may be adopted based on the distribution of the events and actors.


title: Linear transformation distance for bichromatic matchings

abstract:
  Let $P=B\cup R$ be a set of $2n$ points in general position, where $B$ is a
set of $n$ blue points and $R$ a set of $n$ red points. A \emph{$BR$-matching}
is a plane geometric perfect matching on $P$ such that each edge has one red
endpoint and one blue endpoint. Two $BR$-matchings are compatible if their
union is also plane.
  The \emph{transformation graph of $BR$-matchings} contains one node for each
$BR$-matching and an edge joining two such nodes if and only if the
corresponding two $BR$-matchings are compatible. In SoCG 2013 it has been shown
by Aloupis, Barba, Langerman, and Souvaine that this transformation graph is
always connected, but its diameter remained an open question. In this paper we
provide an alternative proof for the connectivity of the transformation graph
and prove an upper bound of $2n$ for its diameter, which is asymptotically
tight.


title:
Row-Based Dual Vdd Assignment, for a Level Converter Free CSA Design and
  Its Near-Threshold Operation

abstract:
  Subthreshold circuit designs are very much popular for some of the ultra low
power applications, where the minimum energy consumption is the primary
concern. But, due to the weak driving current, these circuits generally suffer
from huge performance degradation. Therefore, in this paper, we primarily
targeted to analyze the performance of a Near-Threshold Circuit (NTC), which
retains the excellent energy efficiency of the subthreshold design, while
improving the performance to a certain extent. A modified row-based dual Vdd
4-operand CSA (Carry Save Adder) design has been reported in the present work
using 45 nm technology. Moreover, to find out the effectiveness of the
near-threshold operation of the 4-operand CSA design; it has been compared with
the other design styles. From the simulation results, obtained for the
frequency of 20 MHz, we found that the proposed scheme of CSA design consumes
3.009*10-7 Watt of Average Power (Pavg), which is almost 90.9 % lesser than
that of the conventional CSA design. Whereas, looking at the perspective of
maximum delay at output, the proposed scheme of CSA design provides a fair
44.37 % improvement, compared to that of the subthreshold CSA design.


title: Inverse spin glass and related maximum entropy problems

abstract:
  If we have a system of binary variables and we measure the pairwise
correlations among these variables, then the least structured or maximum
entropy model for their joint distribution is an Ising model with pairwise
interactions among the spins. Here we consider inhomogeneous systems in which
we constrain (for example) not the full matrix of correlations, but only the
distribution from which these correlations are drawn. In this sense, what we
have constructed is an inverse spin glass: rather than choosing coupling
constants at random from a distribution and calculating correlations, we choose
the correlations from a distribution and infer the coupling constants. We argue
that such models generate a block structure in the space of couplings, which
provides an explicit solution of the inverse problem. This allows us to
generate a phase diagram in the space of (measurable) moments of the
distribution of correlations. We expect that these ideas will be most useful in
building models for systems that are nonequilibrium statistical mechanics
problems, such as networks of real neurons.


title: Beyond the Spin Model Approximation for Ramsey Spectroscopy

abstract:
  Ramsey spectroscopy has become a powerful technique for probing
non-equilibrium dynamics of internal (pseudospin) degrees of freedom of
interacting systems. In many theoretical treatments, the key to understanding
the dynamics has been to assume the external (motional) degrees of freedom are
decoupled from the pseudospin degrees of freedom. Determining the validity of
this approximation -- known as the spin model approximation -- is complicated,
and has not been addressed in detail. Here we shed light in this direction by
calculating Ramsey dynamics exactly for two interacting spin-1/2 particles in a
harmonic trap. We focus on $s$-wave-interacting fermions in quasi-one and
two-dimensional geometries. We find that in 1D the spin model assumption works
well over a wide range of experimentally-relevant conditions, but can fail at
time scales longer than those set by the mean interaction energy. Surprisingly,
in 2D a modified version of the spin model is exact to first order in the
interaction strength. This analysis is important for a correct interpretation
of Ramsey spectroscopy and has broad applications ranging from precision
measurements to quantum information and to fundamental probes of many-body
systems.


title:
On the emergence of duration from quantum observation and some
  consequences

abstract:
  We show that by the act of quantum measurement on a system there emerges a
notion of duration and a corresponding time flow which turns out to be the
thermal flow connected to the system. We show that, under some quasi-classical
assumptions on the observer, this flow shows relevant properties of empirical
time and some interesting consequences for Special Relativity are drawn.


title: A new approach to stochastic evolution equations with adapted drift

abstract:
  In this paper we develop a new approach to stochastic evolution equations
with an unbounded drift $A$ which is dependent on time and the underlying
probability space in an adapted way. It is well-known that the semigroup
approach to equations with random drift leads to adaptedness problems for the
stochastic convolution term. In this paper we give a new representation formula
for the stochastic convolution which avoids integration of nonadapted
processes. Here we mainly consider the parabolic setting. We establish
connections with other solution concepts such as weak solutions. The usual
parabolic regularity properties are derived and we show that the new approach
can be applied in the study of semilinear problems with random drift. At the
end of the paper the results are illustrated with two examples of stochastic
heat equations with random drift.


title: Electronic correlation effects in the Cr2GeC Mn+1AXn phase

abstract:
  The magnetic properties, electronic band structure and Fermi surfaces of the
hexagonal Cr2GeC system have been studied by means of both generalized gradient
approximation (GGA) and the +U corrected method (GGA+U). The effective U value
has been computed within the augmented plane-wave theoretical scheme by
following the constrained density functional theory formalism of Anisimov et
al. [1991 Phys. Rev. B 45, 7570]. On the basis of our GGA+U calculations, a
compensated anti-ferromagnetic spin ordering of Cr atoms has been found to be
the ground state solution for this material, where a Ge-mediated super-exchange
coupling is responsible for an opposite spin distribution between the ABA
stacked in-plane Cr-C networks. Structural properties have also been tested and
found to be in good agreement with the available experimental data. Topological
analysis of Fermi surfaces have been used to qualitatively address the
electronic transport properties of Cr2GeC and found an important asymmetrical
carrier-type distribution within the hexagonal crystal lattice. We conclude
that an appropriate description of the strongly correlated Cr-d electrons is an
essential issue for interpreting the material properties of this unusual
Cr-based MAX-phase.


title:
Multipopulation aftereffects on the color-magnitude diagram and Cepheid
  variables of young stellar systems

abstract:
  Context: The evidence of a multipopulation scenario in Galactic globular
clusters raises several questions about the formation and evolution of the two
(or more) generations of stars. These populations show differences in their age
and chemical composition. These differences are found in old- and intermediate-
age stellar clusters in the Local Group. The observations of young stellar
systems are expected to present footprints of multiple stellar populations.
  Aims: This theoretical work intends to be a specific step in exploring the
space of the observational indicators of multipopulations, without covering all
the combinations of parameters that may contribute to the formation of multiple
generations of stars in a cluster or in galaxy. The goal is to shed light on
the possible observational features expected by core He-burning stars that
belong to two stellar populations with different original He content and ages.
  Methods: The tool adopted was the stellar population synthesis. We used new
stellar and pulsation models to construct a homogeneous and consistent
framework. Synthetic color-magnitude diagrams (CMDs) of young- and
intermediate-age stellar systems (from 20 Myr up to 1 Gyr) were computed in
several photometric bands to derive possible indicators of double populations
both in the observed CMDs and in the pulsation properties of the Cepheids.
  Results: We predict that the morphology of the red/blue clump in VIK bands
can be used to photometrically indicate the two stellar populations in a rich
assembly of stars if there is a significant difference in their original He
content. Moreover, the period distribution of the Cepheids appears to be widely
affected by the coeval multiple generations of stars within stellar systems. We
show that the Wesenheit relations may be affected by the helium content of the
Cepheids.


title:
Identification and super-resolution imaging of ligand-activated receptor
  dimers in live cells

abstract:
  Molecular interactions are key to many chemical and biological processes like
protein function. In many signaling processes they occur in sub-cellular areas
displaying nanoscale organizations and involving molecular assemblies. The
nanometric dimensions and the dynamic nature of the interactions make their
investigations complex in live cells. While super-resolution fluorescence
microscopies offer live-cell molecular imaging with sub-wavelength resolutions,
they lack specificity for distinguishing interacting molecule populations. Here
we combine super-resolution microscopy and single-molecule F\"orster Resonance
Energy Transfer (FRET) to identify dimers of receptors induced by ligand
binding and provide super-resolved images of their membrane distribution in
live cells. By developing a two-color
universal-Point-Accumulation-In-the-Nanoscale-Topography (uPAINT) method,
dimers of epidermal growth factor receptors (EGFR) activated by EGF are studied
at ultra-high densities, revealing preferential cell-edge sub-localization.
This methodology which is specifically devoted to the study of molecules in
interaction, may find other applications in biological systems where
understanding of molecular organization is crucial.


title: Classical microscopic theory of polaritons in ionic crystals

abstract:
  It is well known that the optical branches of the dispersion curves of ionic
crystals exhibit a polaritonic feature, i.e., a splitting about the
electromagnetic dispersion line $\omega=ck$. This phenomenon is considered to
be due to the retardation of the electromagnetic forces among the ions.
However, the problem is usually discussed at a phenomenological level, through
the introduction of a macroscopic polarization field, so that a microscopic
treatment is apparently lacking. A microscopic first principles deduction is
given here, in a classical frame, for a model in which the ions are dealt with
as point charges. At a qualitative level it is made apparent that retardation
is indeed responsible for the splitting. A quantitative comparison with the
empirical data for LiF is also given, showing a fairly good agreement over the
whole Brillouin zone.