title: Phonon Quasi-Particles and Anharmonic Free Energy in Complex Systems

abstract:
  We use a hybrid strategy to obtain anharmonic frequency shifts and lifetimes
of phonon quasi-particles from first principles molecular dynamics simulations
in modest size supercells. This approach is effective irrespective of crystal
structure complexity and facilitates calculation of full anharmonic phonon
dispersions, as long as phonon quasi-particles are well defined. We validate
this approach to obtain anharmonic effects with calculations in
MgSiO3-perovskite, the major Earth forming mineral phase. First, we reproduce
irregular temperature induced frequency shifts of well characterized Raman
modes. Second, we combine the phonon gas model (PGM) with quasi-particle
frequencies and reproduce free energies obtained using thermodynamic
integration. Combining thoroughly sampled quasi-particle dispersions with the
PGM we then obtain first-principles anharmonic free energy in the thermodynamic
limit (N right arrow infinity).


title: Statistics of Anisotropies in Inflation with Spectator Vector Fields

abstract:
  We study the statistics of the primordial power spectrum in models where
massless gauge vectors are coupled to the inflaton, paying special attention to
observational implications of having fundamental or effective horizons embedded
in a bath of infrared fluctuations. As quantum infrared modes cross the
horizon, they classicalize and build a background vector field. We find that
the vector experiences a statistical precession phenomenon. Implications for
primordial correlators and the interpretation thereof are considered. Firstly,
we show how in general two, not only one, additional observables, a quadrupole
amplitude and an intrinsic shape parameter, are necessary to fully describe the
correction to the curvature power spectrum, and develop a unique
parametrization for them. Secondly, we show that the observed anisotropic
amplitude and the associated preferred direction depend on the volume of the
patch being probed. We calculate non-zero priors for the expected deviations
between detections based on microwave background data (which probes the entire
Hubble patch) and large scale structure (which only probes a fraction of it).


title: Thermodynamics of SU(3) Gauge Theory from Gradient Flow

abstract:
  A novel method to study the bulk thermodynamics in lattice gauge theory is
proposed on the basis of the Yang-Mills gradient flow with a fictitious time t.
The energy density (epsilon) and the pressure (P) of SU(3) gauge theory at
fixed temperature are calculated directly on 32^3 x (6,8,10) lattices from the
thermal average of the well-defined energy-momentum tensor (T_{mu nu}^R(x))
obtained by the gradient flow. It is demonstrated that the continuum limit can
be taken in a controlled manner from the t-dependence of the flowed data.


title:
Gersten weight structures for motivic homotopy categories; direct
  summands of cohomology of function fields and coniveau spectral sequences

abstract:
  For any cohomology theory $H$ that can be factorized through (the
Morel-Voevodsky's triangulated motivic homotopy category) $SH^{S^1}(k)$ (or
through $SH(k)$) we establish the $SH^{S^1}(k)$-functorialty (resp.
$SH(k)$-one) of coniveau spectral sequences for $H$. We also prove: for any
affine essentially smooth semi-local $S$ the Cousin complex for $H^*(S)$
splits; if $H$ also factorizes through $SH^+(k)$ or $SH^{MGL}(k)$, then this is
also true for any primitive $S$. Moreover, the cohomology of such an $S$ is a
direct summand of the cohomology of any its open dense subscheme. This is a
vast generalization of the results of a previous paper. In order to prove these
results we consider certain categories of motivic pro-spectra, and introduce
Gersten weight structures for them. Our results rely on several interesting
statements on weight structures in cocompactly cogenerated triangulated
categories and on the '$SH^+(k)$-acyclity' of primitive schemes. .


title: $\eta$-invariant and Modular Forms

abstract:
  We show that the Atiyah-Patodi-Singer reduced $\eta$-invariant of the twisted
Dirac operator on a closed $4m-1$ dimensional spin manifold, with the twisted
bundle being the Witten bundle appearing in the theory of elliptic genus, is a
meromorphic modular form of weight $2m$ up to an integral $q$-series. We prove
this result by combining our construction of certain modular characteristic
forms associated to a generalized Witten bundle on spin$^c$-manifolds with a
deep topological theorem due to Hopkins.


title: Size of edge-critical uniquely 3-colorable planar graphs

abstract:
  A graph $G$ is \emph{uniquely k-colorable} if the chromatic number of $G$ is
$k$ and $G$ has only one $k$-coloring up to permutation of the colors. A
uniquely $k$-colorable graph $G$ is edge-critical if $G-e$ is not a uniquely
$k$-colorable graph for any edge $e\in E(G)$. Mel'nikov and Steinberg [L. S.
Mel'nikov, R. Steinberg, One counterexample for two conjectures on three
coloring, Discrete Math. 20 (1977) 203-206] asked to find an exact upper bound
for the number of edges in a edge-critical 3-colorable planar graph with $n$
vertices. In this paper, we give some properties of edge-critical uniquely
3-colorable planar graphs and prove that if $G$ is such a graph with $n(\geq6)$
vertices, then $|E(G)|\leq \frac{5}{2}n-6 $, which improves the upper bound
$\frac{8}{3}n-\frac{17}{3}$ given by Matsumoto [N. Matsumoto, The size of
edge-critical uniquely 3-colorable planar graphs, Electron. J. Combin. 20 (3)
(2013) $\#$P49]. Furthermore, we find some edge-critical 3-colorable planar
graphs which have $n(=10,12, 14)$ vertices and $\frac{5}{2}n-7$ edges.


title: Moist convection scheme in Model E2

abstract:
  This documentation describes the version of the Del Genio - Yao cumulus
parameterization used in the NASA Goddard Institute for Space Studies Model E2
GCM. This version was used for the official GISS submissions to the CMIP5
archive.


title:
Multiple scales kinetic theory for rotationally constrained slow
  inertial waves and anisotropic dynamics

abstract:
  Wave kinetic theory for rapidly rotating flows is developed in this paper
using a rigorous application of multiple scales perturbation theory. The
governing equations are an asymptotically reduced set of equations that are
derived from the incompressible Navier-Stokes equations. These equations are
applicable for rapidly rotating flow regimes and are best suited to describe
anisotropic dynamics of rotating flows. The independent variables of these
equations inherently reside in a helical wave basis that is the most suitable
basis for inertial waves. A coupled system of equations for the two global
invariants: \textit{energy} and \textit{helicity}, is derived by extending a
simpler symmetrical system to the more general non-symmetrical helical case.
This approach of deriving the kinetic equations for helicity follows naturally
by exploiting the symmetries in the system and is different from the
derivations presented in earlier work of \citet{Galtier03, Galtier14} that uses
multiple correlation functions to account for the asymmetry due to helicity.
Stationary solutions, including Kolmogorov solutions, for the flow invariants
are obtained as a scaling law of the anisotropic wave numbers. The scaling law
solutions compare affirmatively with results from recent experimental and
simulation data. The theory developed in this paper pertains to the wave
dynamics supported by an asymptotically reduced set of hydrodynamic equations
and therefore encompasses a different dynamical regime compared to the weak
turbulence theory presented in the work of \citet{Galtier03, Galtier14}.


title: Cowen's class and Thomson's class

abstract:
  In studying commutants of analytic Toeplitz operators, Thomson proved a
remarkable theorem which states that under a mild condition, the commutant of
an analytic Toeplitz operator is equal to that of Toeplitz operator defined by
a finite Blaschke product. Cowen gave an significant improvement of Thosom's
result. In this paper, we will present examples in Cowen's class which does not
lie in Thomson's class.


title: A note on sparse least-squares regression

abstract:
  We compute a \emph{sparse} solution to the classical least-squares problem
$\min_x||A x -b||,$ where $A$ is an arbitrary matrix. We describe a novel
algorithm for this sparse least-squares problem. The algorithm operates as
follows: first, it selects columns from $A$, and then solves a least-squares
problem only with the selected columns. The column selection algorithm that we
use is known to perform well for the well studied column subset selection
problem. The contribution of this article is to show that it gives favorable
results for sparse least-squares as well. Specifically, we prove that the
solution vector obtained by our algorithm is close to the solution vector
obtained via what is known as the "SVD-truncated regularization approach".


title: The behavior of quasar C IV emission-line properties with orientation

abstract:
  With a quasar sample designed for studying orientation effects, we
investigate the orientation dependence of characteristics of the C IV 1549
broad emission line in approximately 50 Type 1 quasars with z=0.1-1.4.
Orientation is measured for the sample via radio core dominance. In our
analysis we include measurements of the continuum luminosity and the
optical-to-X-ray spectral slope, spectral properties commonly included in the
suite known as "Eigenvector 1", and the full-width at half maximum, full-width
at one-quarter-maximum, shape, blueshift, and equivalent width of the C IV
broad emission line. We also investigate a new prescription that we recently
developed for predicting the velocity line width of the H-beta broad emission
line based on the velocity line width of the C IV line and the ratio of
continuum subtracted peak fluxes of Si IV + O IV] at 1400 A to C IV. In
addition to a correlation analysis of the ultraviolet spectral properties and
radio core dominance, we provide composite spectra of edge-on and face-on
sources for this sample. In particular, we highlight the orientation dependence
of the velocity line width predicted for H-beta. We find that this predicted
line width depends on orientation in a manner similar to the true velocity line
width of H-beta, where no such dependence is observed for C IV. This is an
indication that orientation information concerning the line emitting regions
can be extracted from ultraviolet spectra. [abridged]


title:
Variational Results and Solutions in Gauge Gravity and a Bifurcation
  Analysis of Black Hole Orbital Dynamics

abstract:
  An analysis of all known spherically symmetric solutions to the field
equations originating from the Riemann tensor quadratic curvature Lagrangian is
presented. A new exact solution is found for the field equation originating
from the "energy-momentum" equation of the gauge gravity theory. Imposing
equivalence between the Palatini and standard variational field equations
yields an algebraic condition that restricts the number spacetime solutions to
gauge gravity. An analysis of a new spherically symmetric solution to the
conformal gravity field equations is also presented. Point particle orbital
dynamics in both the Schwarzschild and Reissner-Nordstrom black hole spacetimes
are analyzed as 2-d conservative bifurcation phenomena. The Schwarzschild
dynamics exhibit both saddle-center and transcritical bifurcation points and a
calculation of periastron precession is presented that incorporates a
phase-plane analysis of the relativistic equations of motion. Level curves of
constant energy are illustrated for both timelike and null geodesics and a
phase-plane analysis of dynamical invariance between the proper and coordinate
time reference frames is discussed. The Reissner-Nordstrom dynamics exhibit
saddle-center, transcritical, pseudo-transcritical, and additional bifurcations
that combine all three previous bifurcations in various combinations.
Periastron precession in the Reissner-Nordstrom spacetime is analyzed using the
phase-plane and bifurcation techniques and extended to include a bifurcation
point of the dynamics. A numerical solution at these parameter values
illustrates that such orbits typically yield a much larger precession value
compared to the standard value for timelike, precession. The acausal geodesics
considered by Brigman are also discussed and their precession value is
calculated.


title:
Electron capture of strongly screening nuclides $^{56}$Fe, $^{56}$Co,
  $^{56}$Ni , $^{56}$Mn ,$^{56}$Cr and $^{56}$V in presupernova

abstract:
  According to the Shell-Model Monte Carlo method, basing on the Random Phase
Approximation and the linear response theory, we carried out an estimation on
electron capture of strongly screening nuclides $^{56}$Fe, $^{56}$Co, $^{56}$Ni
, $^{56}$Mn ,$^{56}$Cr and $^{56}$V in strong electron screening (SES)in
presupernova. The
  EC rates are decreased greatly and even exceed $21.5\%$ in SES. We also
compare our results with those of Aufderheide (AFUD), which calculated by the
method of Aufderheide in SES. Our results are agreed reasonably well with AUFD
at higher density-temperature surroundings (e.g. $\rho_7>60, T_9=15.40$) and
the maximum error is $\sim $0.5$\%$. However, the maximum error is $\sim
$13.0$\%$ at lower density surroundings (e.g. $^{56}$Cr at $\rho_7=10,
T_9=15.40, Y_e=0.41$ ). On the other hand, we also compared our results in SES
with those of FFN's and Nabi's, which is in the case without SES. The
comparisons show that our results are lower more than one order magnitude than
FFN's, but about $7.23\%$ than Nabi's.


title:
Patterns in Space: Coordinating Adhesion and Actomyosin Contractility at
  E-cadherin Junctions

abstract:
  Cadherin adhesion receptors are fundamental determinants of tissue
organization in health and disease. Increasingly, we have come to appreciate
that classical cadherins exert their biological actions through active
cooperation with the contractile actin cytoskeleton. Rather than being passive
resistors of detachment forces, cadherins can regulate the assembly and
mechanics of the contractile apparatus itself. Moreover, coordinate spatial
patterning of adhesion and contractility is emerging as a determinant of
morphogenesis. Here we review recent developments in cadherins and actin
cytoskeleton cooperativity, by focusing on E-cadherin adhesive patterning in
the epithelia. Next, we discuss the underlying principles of cellular
rearrangement during Drosophila germband extension and epithelial cell
extrusion, as models of how planar and apical-lateral patterns of contractility
organizes tissue architecture.


title:
Non-adiabatic transition probability with a moving $\delta$ potential
  coupling

abstract:
  The present work focuses on the calculation of a non-adiabatic transition
probability between two states which may or may not cross with each other and
are coupled to each other by a moving $\delta$ function potential. Here, the
time dependent Schrodinger equation is converted to time independent one by
using a scaling factor which is function of time. This time independent
Schrodinger equation is then considered for two potentials coupled by a moving
$\delta$ potential and an expression for non-adiabatic transition probability
has been derived.


title: The Status of Neutralino Dark Matter

abstract:
  The lightest neutralino in supersymmetry is the most studied dark matter
candidate. This writeup reviews the status of neutralino dark matter in minimal
and nonminimal supersymmetric models in light of recent null results at the
XENON100 experiment and the observation of a 130 GeV gamma ray signal from the
Galactic Center by the Fermi LAT.


title: The edge cover polynomials of cubic graphs of order 10

abstract:
  Let $G$ be a simple graph of order $n$ and size $m$. The edge covering of $G$
is a set of edges such that every vertex of $G$ is incident to at least one
edge of the set.
  The edge cover polynomial of $G$ is the polynomial
$E(G,x)=\sum_{i=\rho(G)}^{m} e(G,i) x^{i}$, where $e(G,i)$ is the number of
edge coverings of $G$ of size $i$, and $\rho(G)$ is the edge covering number of
$G$. In this paper we study the edge cover polynomials of cubic graphs of order
$10$. We show that all cubic graphs of order $10$ (especially the Petersen
graph) are determined uniquely by their edge cover polynomials. Also we
construct infinite families of graphs whose edge cover polynomials have only
roots $-1$ and $0$.


title:
Guiding center orbit following calculation of edge particle and heat
  transport in stochastic magnetic field

abstract:
  Particle and heat transport in tokamak edge is investigated by guiding center
orbit following calculation. The guiding center equation is solved for both
electrons and ions in the presence of magnetic perturbation. It is suggested
that the remnants of the magnetic islands play a role in characterizing the
radial transport. The transport coefficient is estimated which also demonstrate
local structure in the vicinity of magnetic islands.


title:
Coulomb collisional effects on high energy particles in the presence of
  driftwave turbulence

abstract:
  High energy particles' behavior including fusion born alpha particles in an
ITER like tokamak in the presence of background driftwave turbulence is
investigated by an orbit following calculation. The background turbulence is
given by the toroidal driftwave eigenmode combined with a random number
generator. The transport level is reduced as the particle energy increase; the
widths of the guiding center islands produced by the passing particles are
inverse proportional to the square root of parallel velocities. On the other
hand, the trapped particles are sensitive to $E \times B$ drift at the banana
tips whose radial displacement is larger for lower energy particles. Coulomb
collisional effects are incorporated which modifies the transport process of
the trapped high energy particles whose radial excursion resides in limited
radial domains without collisions.


title:
The homogeneity theorem for supergravity backgrounds II: the
  six-dimensional theories

abstract:
  We prove that supersymmetry backgrounds of (1,0) and (2,0) six-dimensional
supergravity theories preserving more than one half of the supersymmetry are
locally homogeneous. As a byproduct we also establish that the Killing spinors
of such a background generate a Lie superalgebra.


title:
An analysis of crystal cleavage in the passage from atomistic models to
  continuum theory

abstract:
  We study the behavior of atomistic models in general dimensions under
uniaxial tension and investigate the system for critical fracture loads. We
rigorously prove that in the discrete-to-continuum limit the minimal energy
satisfies a particular cleavage law with quadratic response to small boundary
displacements followed by a sharp constant cut-off beyond some critical value.
Moreover, we show that the minimal energy is attained by homogeneous elastic
configurations in the subcritical case and that beyond critical loading
cleavage along specific crystallographic hyperplanes is energetically
favorable. In particular, our results apply to mass spring models with full
nearest and next-to-nearest pair interactions and provide the limiting minimal
energy and minimal configurations.

categories: math.AP cond-mat.mtrl-sci math-ph math.MP


title: A Novel Scheme for Generating Secure Face Templates Using BDA

abstract:
  In identity management system, frequently used biometric recognition system
needs awareness towards issue of protecting biometric template as far as more
reliable solution is apprehensive. In sight of this biometric template
protection algorithm should gratify the basic requirements viz. security,
discriminability and cancelability. As no single template protection method is
capable of satisfying these requirements, a novel scheme for face template
generation and protection is proposed. The novel scheme is proposed to provide
security and accuracy in new user enrolment and authentication process. This
novel scheme takes advantage of both the hybrid approach and the binary
discriminant analysis algorithm. This algorithm is designed on the basis of
random projection, binary discriminant analysis and fuzzy commitment scheme.
Publicly available benchmark face databases (FERET, FRGC, CMU-PIE) and other
datasets are used for evaluation. The proposed novel scheme enhances the
discriminability and recognition accuracy in terms of matching score of the
face images for each stage and provides high security against potential attacks
namely brute force and smart attacks. In this paper, we discuss results viz.
averages matching score, computation time and security for hybrid approach and
novel approach.


title: Second generation planet formation in NN Serpentis?

abstract:
  In this paper, we study the general impact of stellar mass-ejection events in
planetary orbits in post-common envelope binaries with circumbinary planets
like those around NN Serpentis. We discuss a set of simple equations that
determine upper and lower limits for orbital expansion and investigate the
effect of initial eccentricity. We deduce the range of possible semi-major axes
and initial eccentricity values of the planets prior to the common-envelope
event. In addition to spherically-symmetric mass-ejection events, we consider
planetary dynamics under the influence of an expanding disk. In order to have
survived, we suggest that the present planets in NN Ser must have had
semi-major axes $\,{}^>_{\sim}\, 10$ AU and high eccentricity values which is
in conflict with current observations. Consequently, we argue that these
planets were not formed together with their hosting stellar system, but rather
originated from the fraction of matter of the envelope that remained bound to
the binary. According to the cooling age of the white dwarf primary of $10^6$
yr, the planets around NN Ser might be the youngest known so far and open up a
wide range of further study of second generation planet formation.


title:
Distributed Game Theoretic Optimization and Management of Multichannel
  ALOHA Networks

abstract:
  The problem of distributed rate maximization in multi-channel ALOHA networks
is considered. First, we study the problem of constrained distributed rate
maximization, where user rates are subject to total transmission probability
constraints. We propose a best-response algorithm, where each user updates its
strategy to increase its rate according to the channel state information and
the current channel utilization. We prove the convergence of the algorithm to a
Nash equilibrium in both homogeneous and heterogeneous networks using the
theory of potential games. The performance of the best-response dynamic is
analyzed and compared to a simple transmission scheme, where users transmit
over the channel with the highest collision-free utility. Then, we consider the
case where users are not restricted by transmission probability constraints.
Distributed rate maximization under uncertainty is considered to achieve both
efficiency and fairness among users. We propose a distributed scheme where
users adjust their transmission probability to maximize their rates according
to the current network state, while maintaining the desired load on the
channels. We show that our approach plays an important role in achieving the
Nash bargaining solution among users. Sequential and parallel algorithms are
proposed to achieve the target solution in a distributed manner. The
efficiencies of the algorithms are demonstrated through both theoretical and
simulation results.


title: Lelek fan from a projective Fraisse limit

abstract:
  We show that a natural quotient of the projective Fraisse limit of a family
that consists of finite rooted trees is the Lelek fan. Using this construction,
we study properties of the Lelek fan and of its homeomorphism group. We show
that the Lelek fan is projectively universal and projectively ultrahomogeneous
in the class of smooth fans. We further show that the homeomorphism group of
the Lelek fan is totally disconnected, generated by every neighbourhood of the
identity, has a dense conjugacy class, and is simple.


title: A Stone-Weierstrass theorem for MV-algebras and unital $\ell$-groups

abstract:
  Working jointly in the equivalent categories of MV-al\-ge\-bras and
lattice-ordered abelian groups with strong order unit (for short, unital
$\ell$-groups), we prove that isomorphism is a sufficient condition for a
separating subalgebra $A$ of a finitely presented algebra $F$ to coincide with
$F$. The separation and isomorphism conditions do not individually imply $A=F$.
Various related problems, like the separation property of $A$, or $A\cong F$
(for $A$ a separating subalgebra of $F$), are shown to be (Turing-)decidable.
We use tools from algebraic topology, category theory, polyhedral geometry and
computational algebraic logic.


title: Pruned Hurwitz numbers

abstract:
  We define a new Hurwitz problem which is essentially a small core of the
simple Hurwitz problem. The corresponding Hurwitz numbers have simpler
formulae, satisfy effective recursion relations and determine the simple
Hurwitz numbers. We also apply this idea of finding a smaller simpler
enumerative problem to orbifold Hurwitz numbers and Belyi Hurwitz numbers.


title:
Comparing the Performance of Optimal PID and Optimal Fractional-Order
  PID Controllers Applied to the Nonlinear Boost Converter

abstract:
  This paper proposes the application of fractional-order PID (FOPID)
controller for output voltage control of boost converters. For this purpose,
parameters of the FOPID controller are calculated such that the Integral
Absolute Error (IAE) of the variations of the output voltage is minimized.
Since the search space is very large in dealing with such an optimization
problem, the Artificial Bee Colony (ABC) algorithm is used for optimal tuning
the parameters of the FOPID controller. Simulations, which are performed by
using the complete non-minimum phase model of the boost converter, confirm the
fact that the proposed optimal FOPID controller can improve the transient
response of the feedback system by using a considerably smaller control effort
(i.e., less on-off switches) compared to the optimal PID controller. Moreover,
it is shown that the proposed FOPID controller enhances the robustness of the
boost converter to variations in the input voltage.


title: Dynamics of Polymers: a Mean-Field Theory

abstract:
  We derive a general mean-field theory of inhomogeneous polymer dynamics; a
theory whose form has been speculated and widely applied, but not heretofore
derived. Our approach involves a functional integral representation of a
Martin-Siggia-Rose type description of the exact many-chain dynamics. A saddle
point approximation to the generating functional, involving conditions where
the MSR action is stationary with respect to a collective density field $\rho$
and a conjugate MSR response field $\phi$, produces the desired dynamical
mean-field theory. Besides clarifying the proper structure of mean-field theory
out of equilibrium, our results have implications for numerical studies of
polymer dynamics involving hybrid particle-field simulation techniques such as
the single-chain in mean-field method (SCMF).


title: Kink-antikink collisions for twin models

abstract:
  In this work we consider kink-antikink collisions for some classes of
$(1,1)$-dimensional nonlinear models. We are particularly interested to
investigate in which aspect the presence of a general kinetic content in the
Lagrangian could be revealed in a collision process. We consider a particular
class of models known as twin theories, where different models lead to same
solutions for the equations of motion and same energy density profile. The
theories can be distinguished in the level of linear stability of defect
structure. We study a class of k-defect theories depending on a parameter $M$
which is the twin theory of the usual $\phi^4$ theory with standard dynamics.
For $M\to\infty$ both models are characterized by the same potential. In the
regime $1/M^2<<1$, we obtain analytically the spectrum of excitations around
the kink solution. It is shown that with the increasing on the parameter
$1/M^2$: i) the gap between the zero-mode and the first-excited mode increases
and ii) the tendency of one-bounce collision between kink-antikink increases.
We numerically investigate kink-antikink scattering, looking for the influence
of the parameter changing for the thickness and number of two-bounce windows,
and confronting the results with our analytical findings.


title:
An Effective End-User Development Approach Through Domain-Specific
  Mashups for Research Impact Evaluation

abstract:
  Over the last decade, there has been growing interest in the assessment of
the performance of researchers, research groups, universities and even
countries. The assessment of productivity is an instrument to select and
promote personnel, assign research grants and measure the results of research
projects. One particular assessment approach is bibliometrics i.e., the
quantitative analysis of scientific publications through citation and content
analysis. However, there is little consensus today on how research evaluation
should be performed, and it is commonly acknowledged that the quantitative
metrics available today are largely unsatisfactory. A number of different
scientific data sources available on the Web (e.g., DBLP, Google Scholar) that
are used for such analysis purposes. Taking data from these diverse sources,
performing the analysis and visualizing results in different ways is not a
trivial and straight forward task. Moreover, people involved in such evaluation
processes are not always IT experts and hence not capable to crawl data
sources, merge them and compute the needed evaluation procedures. The recent
emergence of mashup tools has refueled research on end-user development, i.e.,
on enabling end-users without programming skills to produce their own
applications. We believe that the heart of the problem is that it is
impractical to design tools that are generic enough to cover a wide range of
application domains, powerful enough to enable the specification of non-trivial
logic, and simple enough to be actually accessible to non-programmers. This
thesis presents a novel approach for an effective end-user development,
specifically for non-programmers. That is, we introduce a domain-specific
approach to mashups that "speaks the language of users"., i.e., that is aware
of the terminology, concepts, rules, and conventions (the domain) the user is
comfortable with.


title:
A cavity-Cooper pair transistor scheme for investigating quantum
  optomechanics in the ultra-strong coupling regime

abstract:
  We propose a scheme involving a Cooper pair transistor (CPT) embedded in a
superconducting microwave cavity, where the CPT serves as a charge tunable
quantum inductor to facilitate ultra-strong coupling between photons in the
cavity and a nano- to meso-scale mechanical resonator. The mechanical resonator
is capacitively coupled to the CPT, such that mechanical displacements of the
resonator cause a shift in the CPT inductance and hence the cavity's resonant
frequency. The amplification provided by the CPT is sufficient for the zero
point motion of the mechanical resonator alone to cause a significant change in
the cavity resonance. Conversely, a single photon in the cavity causes a shift
in the mechanical resonator position on the order of its zero point motion. As
a result, the cavity-Cooper pair transistor (cCPT) coupled to a mechanical
resonator will be able to access a regime in which single photons can affect
single phonons and vice versa. Realizing this ultra-strong coupling regime will
facilitate the creation of non-classical states of the mechanical resonator, as
well as the means to accurately characterize such states by measuring the
cavity photon field.


title: Minimum order of graphs with given coloring parameters

abstract:
  A complete $k$-coloring of a graph $G=(V,E)$ is an assignment
$\varphi:V\to\{1,\ldots,k\}$ of colors to the vertices such that no two
vertices of the same color are adjacent, and the union of any two color classes
contains at least one edge. Three extensively investigated graph invariants
related to complete colorings are the minimum and maximum number of colors in a
complete coloring (chromatic number $\chi(G)$ and achromatic number $\psi(G)$,
respectively), and the Grundy number $\Gamma(G)$ defined as the largest $k$
admitting a complete coloring $\varphi$ with exactly $k$ colors such that every
vertex $v\in V$ of color $\varphi(v)$ has a neighbor of color $i$ for all $1\le
i<\varphi(v)$. The inequality chain $\chi(G)\le \Gamma(G)\le \psi(G)$ obviously
holds for all graphs $G$. A triple $(f,g,h)$ of positive integers at least 2 is
called realizable if there exists a connected graph $G$ with $\chi(G)=f$,
$\Gamma(G)=g$, and $\psi(G)=h$. Chartrand et al. (A note on graphs with
prescribed complete coloring numbers, J. Combin. Math. Combin. Comput. LXXIII
(2010) 77-84) found the list of realizable triples. In this paper we determine
the minimum number of vertices in a connected graph with chromatic number $f$,
Grundy number $g$, and achromatic number $h$, for all realizable triples
$(f,g,h)$ of integers. Furthermore, for $f=g=3$ we describe the (two) extremal
graphs for each $h \geq 6$. For $h=4$ and $5$, there are more extremal graphs,
their description is contained as well.


title:
Learning Temporal Logical Properties Discriminating ECG models of
  Cardiac Arrhytmias

abstract:
  We present a novel approach to learn the formulae characterising the emergent
behaviour of a dynamical system from system observations. At a high level, the
approach starts by devising a statistical dynamical model of the system which
optimally fits the observations. We then propose general optimisation
strategies for selecting high support formulae (under the learnt model of the
system) either within a discrete set of formulae of bounded complexity, or a
parametric family of formulae. We illustrate and apply the methodology on an
in-depth case study of characterising cardiac malfunction from
electro-cardiogram data, where our approach enables us to quantitatively
determine the diagnostic power of a formula in discriminating between different
cardiac conditions.


title: Endomorphisms of Verma modules for rational Cherednik algebras

abstract:
  We study the endomorphism algebra of Verma modules for rational Cherednik
algebras at t=0. It is shown that, in many cases, these endomorphism algebras
are quotients of the centre of the rational Cherednik algebra. Geometrically,
they define Lagrangian subvariaties of the generalized Calogero-Moser space. In
the introduction, we motivate our results by describing them in the context of
derived intersections of Lagrangians.


title: Asymptotic Composite Estimation

abstract:
  Composition methodologies in the current literature are mainly to promote
estimation efficiency via direct composition, either, of initial estimators or
of objective functions. In this paper, composite estimation is investigated for
both estimation efficiency and bias reduction. To this end, a novel method is
proposed by utilizing a regression relationship between initial estimators and
values of model-independent parameter in an asymptotic sense. The resulting
estimators could have smaller limiting variances than those of initial
estimators, and for nonparametric regression estimation, could also have faster
convergence rate than the classical optimal rate that the corresponding initial
estimators can achieve. The simulations are carried out to examine its
performance in finite sample situations.


title: Non-perturbative renormalization: a new way

abstract:
  The notion of non-perturbative renormalization is discussed and extended.
Within the extended picture, a new non-perturbative representation for the
generating functional of Green functions of quantum field theories is
suggested. It is argued that the new expression agrees with the standard
renormalized perturbation theory if the latter is renormalized in an
appropriate renormalization scheme.


abstract:
  In this paper we introduce the notion of $\mathcal I^{\mathcal K}$-Cauchy
function, where $\mathcal I$ and $\mathcal K$ are ideals on the same set. The
$\mathcal I^{\mathcal K}$-Cauchy functions are a generalization of $\mathcal
I^*$-Cauchy sequences and $\mathcal I^*$-Cauchy nets. We show how this notion
can be used to characterize complete uniform spaces and we study how $\mathcal
I^{\mathcal K}$-Cauchy functions and $\mathcal I$-Cauchy functions are related.
We also define and study $\mathcal I^{\mathcal K}$-divergence of functions.


title:
Hierarchical model of the actomyosin molecular motor based on
  ultrametric diffusion with drift

abstract:
  We discuss the approach to investigation of molecular machines using systems
of integro--differential ultrametric (p-adic) reaction--diffusion equations
with drift. This approach combines the features of continuous and discrete
dynamic models. We apply this model to investigation of actomyosin molecular
motor.
  The introduced system of equations is solved analytically using p-adic
wavelet theory. We find explicit stationary solutions and behavior in the
relaxation regime.


title:
Connection between the clique number and the Lagrangian of $3$-uniform
  hypergraphs

abstract:
  There is a remarkable connection between the clique number and the Lagrangian
of a 2-graph proved by Motzkin and Straus in 1965. It is useful in practice if
similar results hold for hypergraphs. However the obvious generalization of
Motzkin and Straus' result to hypergraphs is false. Frankl and F\"{u}redi
conjectured that the $r$-uniform hypergraph with $m$ edges formed by taking the
first $m$ sets in the colex ordering of ${\mathbb N}^{(r)}$ has the largest
Lagrangian of all $r$-uniform hypergraphs with $m$ edges. For $r=2$, Motzkin
and Straus' theorem confirms this conjecture. For $r=3$, it is shown by Talbot
that this conjecture is true when $m$ is in certain ranges. In this paper, we
explore the connection between the clique number and Lagrangians for
$3$-uniform hypergraphs. As an application of this connection, we confirm that
Frankl and F\"{u}redi's conjecture holds for bigger ranges of $m$ when $r$=3.
We also obtain two weaker versions of Tur\'{a}n type theorem for
left-compressed $3$-uniform hypergraphs.


title: Heisenberg Uncertainty Relation Revisited

abstract:
  It is shown that all the known uncertainty relations are the secondary
consequences of Robertson's relation. The basic idea is to use the Heisenberg
picture so that the time development of quantum mechanical operators
incorporate the effects of the measurement interaction. A suitable use of
triangle inequalities then gives rise to various forms of uncertainty
relations. The assumptions of unbiased measurement and unbiased disturbance are
important to simplify the resulting uncertainty relations and to give the
familiar uncertainty relations such as a naive Heisenberg error-disturbance
relation. These simplified uncertainty relations are however valid only
conditionally. Quite independently of uncertainty relations, it is shown that
the notion of precise measurement is incompatible with the assumptions of
unbiased measurement and unbiased disturbance. We can thus naturally understand
the failure of the naive Heisenberg's error-disturbance relation, as was
demonstrated by the recent spin-measurement by J. Erhart, et al..


title: Goeritz Invariant of Torus Links

abstract: We obtain the full list of Goeritz invariants of all torus knots and links.


title:
Detection of the melanoma biomarker TROY using silicon nanowire
  field-effect transistors

abstract:
  Antibody-functionalized silicon nanowire field-effect transistors have been
shown to exhibit excellent analyte detection sensitivity enabling sensing of
analyte concentrations at levels not readily accessible by other methods. One
example where accurate measurement of small concentrations is necessary is
detection of serum biomarkers, such as the recently discovered tumor necrosis
factor receptor superfamily member TROY (TNFRSF19), which may serve as a
biomarker for melanoma. TROY is normally only present in brain but it is
aberrantly expressed in primary and metastatic melanoma cells and shed into the
surrounding environment. In this study, we show the detection of different
concentrations of TROY in buffer solution using top-down fabricated silicon
nanowires. We demonstrate the selectivity of our sensors by comparing the
signal with that obtained from bovine serum albumin in buffer solution. Both
the signal size and the reaction kinetics serve to distinguish the two signals.
Using a fast-mixing two-compartment reaction model, we are able to extract the
association and dissociation rate constants for the reaction of TROY with the
antibody immobilized on the sensor surface.


title:
Asymptotics of the ground state energy of heavy atoms and molecules in
  combined magnetic field

abstract:
  We consider asymptotics of the ground state energy of heavy atoms and
molecules in the self-generatedl magnetic field. Namely, we consider
$$H=((D-A)\cdot\boldsymbol{\sigma})^2-V$$ with $$V=\sum_{1\le m\le M}
\frac{Z_m}{|x-y_m|}$$ and a corresponding Multiparticle Quantum Hamiltonian $$
\mathsf{H}=\sum_{1\le n\le N} H_{x_n} +\sum_{1\le n < n'\le N}|x_n-x_n'|^{-1}
$$ on the Fock space $\wedge _{1\le n\le N} L^2(\mathbb{R}^3, \mathbb{C}^2)$.
Here $A=A^0+A'$ where $A^0=\frac{1}{2}(-B x_2, B x_1,0)$ is an external
magnetic field and $A'$ is self-generated magnetic field. Then the ground state
energy is given by $$ \mathsf{E}(A)=\inf
\operatorname{Spec}(\mathsf{H})+\frac{1}{\alpha}\int |\nabla \times A'|^2\,dx
$$ where the last term is the energy of magnetic field.
  Under assumptions $\alpha Z\le \kappa^*$ (with a small constant $\kappa^*$)
and $M=1$ (atomic case) we study the ground State Energy
$$\mathsf{E}^*=\inf_{A'}\mathsf{E}(A).$$ We derive its asymptotics including
Scott, and Schwinger and Dirac corrections (depending on $B\ll Z^3$).
  In the next versions we will consider also molecules and related topics: an
excessive negative charge, ionization energy and excessive positive charge when
atoms can still bind into molecules.


title:
On band spectrum of Schroedinger operator in periodic system of domains
  coupled by small windows

abstract:
  We consider a periodic system of domains coupled by small windows. In such
domain we study the band spectrum of a Schroedinger operator subject to Neumann
condition. We show that near each isolated eigenvalue of the similar operator
but in the periodicity cell, there are several non-intersecting bands of the
spectrum for the perturbed operator. We also discuss the position of the points
at which the band functions attain the edges of each band.


title: Anomalous decoherence effects in driven coupled quantum spin systems

abstract:
  We discuss anomalous decoherence effects at zero and finite temperatures in
driven coupled quantum spin systems. By numerical simulations of the quantum
master equation, it is found that the entanglement of two coupled spin qubits
exhibits a non-monotonic behaviour as a function of the noise strength. The
effects of noise strength, the detuning and finite temperature of independent
environments on the steady state entanglement are addressed in detail. Pumped
by an external field drive, non-trivial steady states can be found, the steady
state entanglement increases monotonically up to a maximum at certain optimal
noise strength and decreases steadily for higher values. Furthermore,
increasing the detuning can not only induce but also suppress steady state
entanglement, which depends on the value of noise strength. At last, we delimit
the border between presence or absence of steady state entanglement and discuss
the related experimental temperatures where typical biomolecular systems
exhibit long-lived coherences and quantum entanglement in photosynthetic
light-harvesting complexes.


title:
Origin of the peculiar eccentricity distribution of the inner cold
  Kuiper belt

abstract:
  Dawson and Murray-Clay (2012) pointed out that the inner part of the cold
population in the Kuiper belt (that with semi major axis a<43.5 AU) has orbital
eccentricities significantly smaller than the limit imposed by stability
constraints. Here, we confirm their result by looking at the orbital
distribution and stability properties in proper element space. We show that the
observed distribution could have been produced by the slow sweeping of the 4/7
mean motion resonance with Neptune that accompanied the end of Neptune's
migration process. The orbital distribution of the hot Kuiper belt is not
significantly affected in this process, for the reasons discussed in the main
text. Therefore, the peculiar eccentricity distribution of the inner cold
population can not be unequivocally interpreted as evidence that the cold
population formed in-situ and was only moderately excited in eccentricity; it
can simply be the signature of Neptune's radial motion, starting from a
moderately eccentric orbit. We discuss how this agrees with a scenario of giant
planet evolution following a dynamical instability and, possibly, with the
radial transport of the cold population.


title:
Features of Hypothetical Plasma Phase Transition in Interiors of Saturn
  and Jupiter

abstract:
  Anomalous features for hypothetical Plasma Phase Transitions (PPT), which is
expected to occur in mixed hydrogen-helium plasma in interior of Jupiter and
Saturn, are under discussion. The characteristics of the Coulomb and density
corrections (the so-called non-ideality corrections) are reconstructed for
hydrogen-helium plasma in the vicinity of phase coexistence boundary of this
PPT in version of Saumon and Chabrier, using tabular data for hydrogen-helium
EOS of Saumon, Chabrier and VanHorn and some general thermodynamic relations.
Two previously unknown characteristics of the studied PPT have been estimated
based on these results: (i) -- the jump of the electrostatic potential across
the phase boundary of PPT (Galvani potential), and (ii) -- the scale of
non-congruency for this PPT (the differences in chemical composition of the
coexisting hydrogen-helium phases), which could be expected in H2/He mixture at
typical parameters of plasma in interior of Jupiter and Saturn. While the first
effect -- the potential of phase boundary -- turned out to be within the
typical scale of contact electrochemical potentials, $\Delta \varphi$ ~ 1-2 eV,
the second quantity -- the PPT non-congruency -- proved to be considerable
under Saturn and Jupiter conditions.


title:
A technique for determining the signs of sensitivities of steady states
  in chemical reaction networks

abstract:
  We present a computational procedure to characterize the signs of
sensitivities of steady states to parameter perturbations in chemical reaction
networks.


title: Descent on toric fibrations

abstract:
  We describe descent on families of torsors of a constant torus. A recent
result of Browning and Matthiesen then implies that the Brauer--Manin
obstruction controls the Hasse principle and weak approximation when the ground
field is the field of rational numbers and the singular fibres are all defined
over this field.


title:
Rationally smooth Schubert varieties and inversion hyperplane
  arrangements

abstract:
  We show that an element $w$ of a finite Weyl group $W$ is rationally smooth
if and only if the hyperplane arrangement $I$ associated to the inversion set
of $w$ is inductively free, and the product $(d_1+1) \cdots (d_l+1)$ of the
coexponents $d_1,\ldots,d_l$ is equal to the size of the Bruhat interval
$[e,w]$, where $e$ is the identity in $W$. As part of the proof, we describe
exactly when a rationally smooth element in a finite Weyl group has a chain
Billey-Postnikov decomposition. For finite Coxeter groups, we show that chain
Billey-Postnikov decompositions are connected with certain modular coatoms of
$I$.


title: Statistics of shocks in a toy model with heavy tails

abstract:
  We study the energy minimization for a particle in a quadratic well in
presence of short-ranged heavy-tailed disorder, as a toy model for an elastic
manifold. The discrete model is shown to be described in the scaling limit by a
continuum Poisson process model which captures the three universality classes.
This model is solved in general, and we give, in the present case (Frechet
class), detailed results for the distribution of the minimum energy and
position, and the distribution of the sizes of the shocks (i.e. switches in the
ground state) which arise as the position of the well is varied. All these
distributions are found to exhibit heavy tails with modified exponents. These
results lead to an "exotic regime" in Burgers turbulence decaying from a
heavy-tailed initial condition.


title: Towards Connected Enterprises: The Business Network System

abstract:
  The discovery, representation and reconstruction of Business Networks (BN)
from Network Mining (NM) raw data is a difficult problem for enterprises. This
is due to huge amounts of complex business processes within and across
enterprise boundaries, heterogeneous technology stacks, and fragmented data. To
remain competitive, visibility into the enterprise and partner networks on
different, interrelated abstraction levels is desirable. We present a novel
data discovery, mining and network inference system, called Business Network
System (BNS), that reconstructs the BN--integration and business process
networks--from raw data, hidden in the enterprises' landscapes. BNS provides a
new, declarative foundation for gathering information, defining a network
model, inferring the network and check its conformance to the real-world
"as-is" network. The paper covers both the foundation and the key features of
BNS, including its underlying technologies, its overall system architecture,
and its most interesting capabilities.


title:
Sudakov Factor in the Deep Inelastic Scattering of a Current off a Large
  Nucleus

abstract:
  We consider a gedanken experiment of the scattering of a current off a large
nucleus to study the gluon saturation at the small-x limit and compute the
Sudakov factor of this process through a one-loop calculation. The differential
cross section is expressed in term of the Sudakov resummation, in which the
collinear and the rapidity divergences are subtracted. We also discuss how to
probe the Weizsaecker-Williams (WW) gluon distribution in the process of photon
pair production in the pA collisions.


title:
The spin-orbit resonances of the Solar system: A mathematical treatment
  matching physical data

abstract:
  In the mathematical framework of a restricted, slightly dissipative
spin-orbit model, we prove the existence of periodic orbits for astronomical
parameter values corresponding to all satellites of the Solar system observed
in exact spin-orbit resonance.


title: The process of macroprudential oversight in Europe

abstract:
  The 2007--2008 financial crisis has paved the way for the use of
macroprudential policies in supervising the financial system as a whole. This
paper views macroprudential oversight in Europe as a process, a sequence of
activities with the ultimate aim of safeguarding financial stability. To
conceptualize a process in this context, we introduce the notion of a public
collaborative process (PCP). PCPs involve multiple organizations with a common
objective, where a number of dispersed organizations cooperate under various
unstructured forms and take a collaborative approach to reaching the final
goal. We argue that PCPs can and should essentially be managed using the tools
and practices common for business processes. To this end, we conduct an
assessment of process readiness for macroprudential oversight in Europe. Based
upon interviews with key European policymakers and supervisors, we provide an
analysis model to assess the maturity of five process enablers for
macroprudential oversight. With the results of our analysis, we give clear
recommendations on the areas that need further attention when macroprudential
oversight is being developed, in addition to providing a general purpose
framework for monitoring the impact of improvement efforts.


title:
Asymmetric band widening by screened exchange competing with local
  correlations in SrVO3: new surprises on an old compound from combined GW and
  dynamical mean field theory GW+DMFT

abstract:
  The very first dynamical implementation of the combined GW and dynamical mean
field scheme "GW+DMFT" for a real material was achieved recently [J.M. Tomczak
et al., Europhys. Lett. 100 67001 (2012)], and applied to the ternary
transition metal oxide SrVO3. Here, we review and extend that work, giving not
only a detailed account of full GW+DMFT calculations, but also discussing and
testing simplified approximate schemes. We give insights into the nature of
exchange and correlation effects: Dynamical renormalizations in the Fermi
liquid regime of SrVO3 are essentially local, and nonlocal correlations mainly
act to screen the Fock exchange term. The latter substantially widens the
quasi-particle band structure, while the band narrowing induced by the former
is accompanied by a spectral weight transfer to higher energies. Most
interestingly, the exchange broadening is much more pronounced in the
unoccupied part of spectrum. As a result, the GW+DMFT electronic structure of
SrVO3 resembles the conventional density functional based dynamical mean field
(DFT+DMFT) description for occupied states, but is profoundly modified in the
empty part. Our work leads to a reinterpretation of inverse photoemission
spectroscopy (IPES) data. Indeed, we assign a prominent peak at about 2.7 eV
dominantly to eg states, rather than to an upper Hubbard band of t2g character.
Similar surprises can be expected for other transition metal oxides, calling
for more detailed investigations of the conduction band states.


title:
Solutions of differential-algebraic equations as outputs of LTI systems:
  application to LQ control problem

abstract:
  In this paper we synthesize behavioral ideas with geometric control theory
and propose a unified geometric framework for representing all solutions of a
Linear Time Invariant Differential-Algebraic Equation (DAE-LTI) as outputs of
classical Linear Time Invariant systems (ODE-LTI). An algorithm for computing
an ODE-LTI that generates solutions of a given DAE-LTI is described. It is
shown that two different ODE-LTIs which represent the same DAE-LTI are feedback
equivalent. The proposed framework is then used to solve an LQ optimal control
problem for DAE-LTIs with rectangular matrices.


title:
Proof of two divisibility properties of binomial coefficients
  conjectured by Z.-W. Sun

abstract:
  For all positive integers n, we prove the following divisibility properties:
$$(2n+3){2n\choose n} | 3{6n\choose 3n}{3n\choose n}, and (10n+3){3n\choose n}
| 21{15n\choose 5n} {5n\choose n}.$$ This confirms two recent conjectures of
Z.-W. Sun. Some similar divisibility properties are given. Moreover, we show
that, for all positive integers m and n, the product $am{am+bm-1\choose
am}{an+bn\choose an}$ is divisible by m+n. In fact, the latter result can be
generalized to the q-binomial coefficients and q-integers case, which
generalizes the positivity of q-Catalan numbers. We also propose several
related conjectures.


title: Review of recent leading-order hadronic vacuum polarization calculation

abstract:
  The leading-order hadronic contribution to the muon magnetic moment anomaly
$a_\mu\equiv (g_\mu-2)/2$, calculated using a dispersion integral of $e^+e^-$
annihilation data and $\tau$ data, is briefly reviewed. This contribution has
the largest uncertainty to the predicted value of $a_\mu$, which differs from
the direct measurement by $\sim 3.6 (2.4)$ standard deviations for the $e^+e^-
(\tau)$ based analysis. Recent results and main open issues on the subject are
discussed.


title:
LIFE ON EARTH -- AN ACCIDENT? Chiral Symmetry and the Anthropic
  Principle

abstract:
  I discuss the fine-tuning of the nuclear forces and in the formation of
nuclei in the production of the elements in the Big Bang and in stars.


title: Information-theoretic interpretation of quantum formalism

abstract:
  We present an information-theoretic interpretation of quantum formalism based
on a Bayesian framework and devoid of any extra axiom or principle. Quantum
information is construed as a technique for analyzing a logical system subject
to classical constraints, based on a question-and-answer procedure. The problem
is posed from a particular batch of queries while the constraints are
represented by the truth table of a set of Boolean functions. The Bayesian
inference technique consists in assigning a probability distribution within a
real-valued probability space to the joint set of queries in order to satisfy
the constraints. The initial query batch is not unique and alternative batches
can be considered at will. They are enabled mechanically from the initial
batch, quite simply by transcribing the probability space into a Hilbert space.
It turns out that this sole procedure leads to exactly recover the standard
quantum information theory and thus provides an information-theoretic rationale
to its technical rules. In this framework, the great challenges of quantum
mechanics become simple platitudes: Why is the theory probabilistic? Why is the
theory linear? Where does the Hilbert space come from? In addition, most of the
paradoxes, such as uncertainty principle, entanglement, contextuality,
nonsignaling correlation, measurement problem, etc., become straightforwards
features. In the end, our major conclusion is that quantum information is
nothing but classical information processed by a mature form of Bayesian
inference technique and, as such, consubstantial with Aristotelian logic.


title: Electron capture of iron group nuclei in magnetars

abstract:
  Using the theory of relativity in superstrong magnetic fields (SMFs) and
nuclear shell model, we carry out estimation for electron capture (EC) rates on
iron group nuclei in SMFs. The rates of change of electronic abundance (RCEA)
due to EC are also investigated in SMFs. It is concluded that the EC rates of
most iron group nuclides are increased greatly by SMFs and even exceeded by
nine orders of magnitude. On the other hand, RCEA is influenced greatly by SMFs
and even reduced by more than eight orders of magnitude in the EC reaction.We
also compare our results with those of Fuller et al.(FFN) and Aufderheide et
al.(AUFD) in the case with and without SMFs. The results show that our results
are in good agreement with AUFD's, but the rates of FFN's are about close to
one order of magnitude bigger than ours in the case without SMFs. On the
contrary, our calculated rates for most nuclides in SMFs are increased and even
exceeded as much as for nine and eight orders of magnitude of compared to FFN's
and AUFD's results, which is in the case without SMFs, respectively.


title: Proliferation of neutral modes in fractional quantum Hall states

abstract:
  The fractional quantum Hall effect (FQHE) is a canonical example of a
topological phase in a correlated 2D electron gas under strong magnetic field.
While electric currents propagate as chiral downstream edge modes, chargeless
upstream chiral neutral edge modes were recently observed only in
hole-conjugate states (states filling \nu, n+1/2<\nu<n+1, with n=0,1,2,...),
and in the even denominator state \nu=5/2. It is believed that spontaneous
'density reconstruction' near the edges of the 2D gas, leads to multiple
counter propagating edge channels, being separated from each other by
incompressible strips. Unavoidable disorder induces inter-channel tunneling;
accompanied by Coulomb interaction it renormalizes the multiple edge channels
to a downstream charge mode and upstream neutral edge mode(s), while
maintaining the parity requirements (e.g., the heat conductance along the edge)
dictated by the bulk. Here, we report of highly sensitive shot noise
measurements that revealed unexpected presence of neutral modes in a variety of
non-hole-conjugate fractional states. As already reported previously, we did
not observe neutral modes in any of the integer states. In addition to the
upstream neutral edge modes, we were surprised to find also neutral energy
modes that propagate through the incompressible bulk. While along the edge,
density reconstruction may account for the edge modes, we are not aware of a
model that can account for the bulk modes. The proliferation of neutral modes,
in every tested fractional state, changes drastically the accepted picture of
FQHE states: an insulating bulk and 1D chiral edge channels. The apparent
ubiquitous presence of these energy modes may account for decoherence of
fractional quasiparticles - preventing observation of coherent interference in
the fractional regime.


title:
Equidistribution towards the bifurcation current I : Multipliers and
  degree d polynomials

abstract:
  In the moduli space of degree d polynomials, the set Per\_n(w) of classes [f]
for which f admits a cycle of exact period n and multiplier w is known to be an
algebraic hypersurface. We prove that, given a complex number w, these
hypersurfaces equidistribute towards the bifurcation current as n tends to
infinity.


title: Cops and Robbers on diameter two graphs

abstract:
  In this short paper we study the game of Cops and Robbers, played on the
vertices of some fixed graph $G$ of order $n$. The minimum number of cops
required to capture a robber is called the cop number of $G$. We show that the
cop number of graphs of diameter 2 is at most $\sqrt{2n}$, improving a recent
result of Lu and Peng by a constant factor. We conjecture that this bound is
still not optimal, and obtain some partial results towards the optimal bound.


title:
Stochastic Model for Tumor Control Probability: Effects of Cell Cycle
  and (A)symmetric Proliferation

abstract:
  Estimating the required dose in radiotherapy is of crucial importance since
the administrated dose should be sufficient to eradicate the tumor and at the
same time should inflict minimal damage on normal cells. The probability that a
given dose and schedule of ionizing radiation eradicates all the tumor cells in
a given tissue is called the tumor control probability (TCP), and is often used
to compare various treatment strategies used in radiation therapy. In this
paper, we aim to investigate the effects of including cell-cycle phase on the
TCP by analyzing a stochastic model of a tumor comprised of actively dividing
cells and quiescent cells with different radiation sensitivities. We derive an
exact phase-diagram for the steady-state TCP of the model and show that at
high, clinically-relevant doses of radiation, the distinction between active
and quiescent tumor cells (i.e. accounting for cell-cycle effects) becomes of
negligible importance in terms of its effect on the TCP curve. However, for
very low doses of radiation, these proportions become significant determinants
of the TCP. Moreover, we use a novel numerical approach based on the method of
characteristics for partial differential equations, validated by the Gillespie
algorithm, to compute the TCP as a function of time. We observe that our
results differ from the results in the literature using similar existing
models, even though similar parameters values are used, and the reasons for
this are discussed.


title:
A Novel Retinal Vessel Segmentation Based On Histogram Transformation
  Using 2-D Morlet Wavelet and Supervised Classification

abstract:
  The appearance and structure of blood vessels in retinal images have an
important role in diagnosis of diseases. This paper proposes a method for
automatic retinal vessel segmentation. In this work, a novel preprocessing
based on local histogram equalization is used to enhance the original image
then pixels are classified as vessel and non-vessel using a classifier. For
this classification, special feature vectors are organized based on responses
to Morlet wavelet. Morlet wavelet is a continues transform which has the
ability to filter existing noises after preprocessing. Bayesian classifier is
used and Gaussian mixture model (GMM) is its likelihood function. The
probability distributions are approximated according to training set of manual
that has been segmented by a specialist. After this, morphological transforms
are used in different directions to make the existing discontinuities uniform
on the DRIVE database, it achieves the accuracy about 0.9571 which shows that
it is an accurate method among the available ones for retinal vessel
segmentation.


title:
Features of the surface tension for the metal--insulator boundary in the
  vicinity of MI phase transition in the presence of external magnetic field

abstract:
  The self-consistent equations for MI phase transition are formulated. We
assume two order parameters which describe the phase transition. The first one
is the density distribution at MI boundary $\rho (\vec r)$. The second one is a
two component complex vector in spin space $\Psi (\vec r)$. It determines
electron density in metallic or semimetallic phase in the presence of external
magnetic field. Two different components of the vector describe possible spin
states of electrons inserted in the external magnetic field.
  The first order type MI phase transition determined by the variation of the
density distribution is considered by means of the gradient expansion of Cahn
and Hillard type \cite{CahnHillard}. The second order type transition of
electron density beside MI boundary is described by Ginzburg -- Landau
expansion \cite{LandLif2}. The interaction between these two parameters is
assumed to be linear as a function of electron density with a coefficient which
depends on metallic density (cf. \cite{JinwuYe_Lubensky}). The obtained
nonlinear equations are exactly solved in the case of MI boundary in the
presence of the parallel to the boundary or perpendicular to it uniform
magnetic field. The surface tension $\Sigma _{mi}$ at the MI boundary is
calculated. It is shown that $\Sigma _{mi}$ is singular. In particular, $\Sigma
_{mi}\sim n^{3/2}$ as $ n\Rightarrow 0$ and $\Sigma _{mi}\sim (T-T_c (\vec
h))^{3/2} .$ $T_c (\vec h)$ is the transition temperature in the presence of
external magnetic field at MI phase transition. \par The singular behavior of
$\Sigma _{mi}$ leads to an emphasized hysteresis at MI transition.


title:
A model selection approach for clustering a multinomial sequence with
  non-negative factorization

abstract:
  We consider a problem of clustering a sequence of multinomial observations by
way of a model selection criterion. We propose a form of a penalty term for the
model selection procedure. Our approach subsumes both the conventional AIC and
BIC criteria but also extends the conventional criteria in a way that it can be
applicable also to a sequence of sparse multinomial observations, where even
within a same cluster, the number of multinomial trials may be different for
different observations. In addition, as a preliminary estimation step to
maximum likelihood estimation, and more generally, to maximum $L_{q}$
estimation, we propose to use reduced rank projection in combination with
non-negative factorization. We motivate our approach by showing that our model
selection criterion and preliminary estimation step yield consistent estimates
under simplifying assumptions. We also illustrate our approach through
numerical experiments using real and simulated data.


title:
Implementation of Hand Detection based Techniques for Human Computer
  Interaction

abstract:
  The computer industry is developing at a fast pace. With this development
almost all of the fields under computers have advanced in the past couple of
decades. But the same technology is being used for human computer interaction
that was used in 1970s. Even today the same type of keyboard and mouse is used
for interacting with computer systems. With the recent boom in the mobile
segment touchscreens have become popular for interaction with cell phones. But
these touchscreens are rarely used on traditional systems. This paper tries to
introduce methods for human computer interaction using the users hand which can
be used both on traditional computer platforms as well as cell phones. The
methods explain how the users detected hand can be used as input for
applications and also explain applications that can take advantage of this type
of interaction mechanism.


title: Two-dimensional state sum models and spin structures

abstract:
  The state sum models in two dimensions introduced by Fukuma, Hosono and Kawai
are generalised by allowing algebraic data from a non-symmetric Frobenius
algebra. Without any further data, this leads to a state sum model on the
sphere. When the data is augmented with a crossing map, the partition function
is defined for any oriented surface with a spin structure. An algebraic
condition that is necessary for the state sum model to be sensitive to spin
structure is determined. Some examples of state sum models that distinguish
topologically-inequivalent spin structures are calculated.


title: Scalar field breathers on anti-de Sitter background

abstract:
  We study spatially localized, time-periodic solutions (breathers) of scalar
field theories with various self-interacting potentials on Anti-de Sitter (AdS)
spacetimes in $D$ dimensions. A detailed numerical study of spherically
symmetric configurations in $D=3$ dimensions is carried out, revealing a rich
and complex structure of the phase-space (bifurcations, resonances). Scalar
breather solutions form one-parameter families parametrized by their amplitude,
$\varepsilon$, while their frequency, $\omega=\omega(\varepsilon)$, is a
function of the amplitude. The scalar breathers on AdS we find have a small
amplitude limit, tending to the eigenfunctions of the linear Klein-Gordon
operator on AdS. Importantly most of these breathers appear to be generically
stable under time evolution.


title: Weighted Well-Covered Claw-Free Graphs

abstract:
  A graph G is well-covered if all its maximal independent sets are of the same
cardinality. Assume that a weight function w is defined on its vertices. Then G
is w-well-covered if all maximal independent sets are of the same weight. For
every graph G, the set of weight functions w such that G is w-well-covered is a
vector space. Given an input claw-free graph G, we present an O(n^6)algortihm,
whose input is a claw-free graph G, and output is the vector space of weight
functions w, for which G is w-well-covered. A graph G is equimatchable if all
its maximal matchings are of the same cardinality. Assume that a weight
function w is defined on the edges of G. Then G is w-equimatchable if all its
maximal matchings are of the same weight. For every graph G, the set of weight
functions w such that G is w-equimatchable is a vector space. We present an
O(m*n^4 + n^5*log(n)) algorithm which receives an input graph G, and outputs
the vector space of weight functions w such that G is w-equimatchable.


title:
Sequences of irreducible polynomials without prescribed coefficients
  over finite fields of even characteristic

abstract:
  In this paper we deal with the construction of sequences of irreducible
polynomials with coefficients in finite fields of even characteristic. We rely
upon a transformation used by Kyuregyan in 2002, which generalizes the
$Q$-transform employed previously by Varshamov and Meyn for the synthesis of
irreducible polynomials. While in the iterative procedure described by
Kyuregyan the coefficients of the initial polynomial of the sequence have to
satisfy certain hypotheses, in the present paper we construct infinite
sequences of irreducible polynomials of non-decreasing degree starting from any
irreducible polynomial.


title:
Microwave spectroscopic observation of distinct electron solid phases in
  wide quantum wells

abstract:
  In high magnetic fields ($B$), two dimensional electron systems (2DESs) can
form a number of phases in which interelectron repulsion plays the central
role, since the kinetic energy is frozen out by Landau quantization. These
phases include the well-known liquids of the fractional quantum Hall effect
(FQHE), as well as solid phases with broken spatial symmetry and crystalline
order. Solids can occur at the low Landau filling ($\nu$) termination of the
FQHE series, but also within integer quantum Hall effects (IQHEs). Here, we
present microwave spectroscopy studies of wide quantum wells (WQWs). The
spectra clearly reveal two distinct solid phases, hidden within what in dc
transport would be the zero diagonal conductivity of an integer quantum Hall
effect state. Explanation of these solids is not possible with the simple
picture of a Wigner solid (WS) of ordinary (quasi) electrons or holes.


title: Tracing the past of a quantum particle

abstract:
  The question: "Where was a quantum particle between pre- and postselection
measurements?" is analyzed in view of a recent proposal that it was in the
overlap of the forward and backward evolving wave functions. It is argued that
this proposal corresponds not only to the criterion of where the particle
leaves a weak trace, but also where the local interactions can affect the
probability of postselection and where finding the particle in a strong
nondemolition measurement is possible. The concept of a "secondary presence" of
a pre- and postselected particle where local interactions affect the weak trace
in the overlap region is introduced.


title: Nonparametric Inference For Density Modes

abstract:
  We derive nonparametric confidence intervals for the eigenvalues of the
Hessian at modes of a density estimate. This provides information about the
strength and shape of modes and can also be used as a significance test. We use
a data-splitting approach in which potential modes are identified using the
first half of the data and inference is done with the second half of the data.
To get valid confidence sets for the eigenvalues, we use a bootstrap based on
an elementary-symmetric-polynomial (ESP) transformation. This leads to valid
bootstrap confidence sets regardless of any multiplicities in the eigenvalues.
We also suggest a new method for bandwidth selection, namely, choosing the
bandwidth to maximize the number of significant modes. We show by example that
this method works well. Even when the true distribution is singular, and hence
does not have a density, (in which case cross validation chooses a zero
bandwidth), our method chooses a reasonable bandwidth.


title:
Local relaxation and light-cone-like propagation of correlations in a
  trapped one-dimensional Bose gas

abstract:
  We describe the relaxation dynamics of a coherently split one-dimensional
(1D) Bose gas in the harmonic approximation. A dephased, prethermalized state
emerges in a light-cone-like evolution which is connected to the spreading of
correlations with a characteristic velocity. In our description we put special
emphasis on the influence of the longitudinal trapping potential and the finite
size of the system, both of which are highly relevant in experiments. In
particular, we quantify their influence on the phase correlation properties and
the characteristic velocity with which the prethermalized state is established.
Finally, we show that the trapping potential has an important effect on the
recurrences of coherence which are expected to appear in a finite size system.


title: On small gaps among primes

abstract:
  A few years ago we identified a recursion that works directly with the gaps
among the generators in each stage of Eratosthenes sieve. This recursion
provides explicit enumerations of sequences of gaps among the generators, which
are known as constellations.
  As the recursion proceeds, adjacent gaps within longer constellations are
added together to produce shorter constellations of the same sum. These
additions or closures correspond to removing composite numbers that are
divisible by the prime for that stage of Eratosthenes sieve. Although we don't
know where in the cycle of gaps a closure will occur, we can enumerate exactly
how many copies of various constellations will survive each stage.
  In this paper, we study these systems of constellations of a fixed sum.
Viewing them as discrete dynamic systems, we are able to characterize the
populations of constellations for sums including the first few primorial
numbers: 2, 6, 30.
  Since the eigenvectors of the discrete dynamic system are independent of the
prime -- that is, independent of the stage of the sieve -- we can characterize
the asymptotic behavior exactly. In this way we can give exact ratios of the
occurrences of the gap 2 to the occurrences of other small gaps for all stages
of Eratosthenes sieve.


title:
Actions in the Eye: Dynamic Gaze Datasets and Learnt Saliency Models for
  Visual Recognition

abstract:
  Systems based on bag-of-words models from image features collected at maxima
of sparse interest point operators have been used successfully for both
computer visual object and action recognition tasks. While the sparse,
interest-point based approach to recognition is not inconsistent with visual
processing in biological systems that operate in `saccade and fixate' regimes,
the methodology and emphasis in the human and the computer vision communities
remains sharply distinct. Here, we make three contributions aiming to bridge
this gap. First, we complement existing state-of-the art large scale dynamic
computer vision annotated datasets like Hollywood-2 and UCF Sports with human
eye movements collected under the ecological constraints of the visual action
recognition task. To our knowledge these are the first large human eye tracking
datasets to be collected and made publicly available for video,
vision.imar.ro/eyetracking (497,107 frames, each viewed by 16 subjects), unique
in terms of their (a) large scale and computer vision relevance, (b) dynamic,
video stimuli, (c) task control, as opposed to free-viewing. Second, we
introduce novel sequential consistency and alignment measures, which underline
the remarkable stability of patterns of visual search among subjects. Third, we
leverage the significant amount of collected data in order to pursue studies
and build automatic, end-to-end trainable computer vision systems based on
human eye movements. Our studies not only shed light on the differences between
computer vision spatio-temporal interest point image sampling strategies and
the human fixations, as well as their impact for visual recognition
performance, but also demonstrate that human fixations can be accurately
predicted, and when used in an end-to-end automatic system, leveraging some of
the advanced computer vision practice, can lead to state of the art results.


title:
A photometric and spectroscopic survey of solar twin stars within 50
  parsecs of the Sun: I. Atmospheric parameters and color similarity to the Sun

abstract:
  Solar twins and analogs are fundamental in the characterization of the Sun's
place in the context of stellar measurements, as they are in understanding how
typical the solar properties are in its neighborhood. They are also important
for representing sunlight observable in the night sky for diverse photometric
and spectroscopic tasks, besides being natural candidates for harboring
planetary systems similar to ours and possibly even life-bearing environments.
We report a photometric and spectroscopic survey of solar twin stars within 50
pc of the Sun. Hipparcos absolute magnitudes and (B-V)_Tycho colors were used
to define a 2 sigma box around the solar values, where 133 stars were
considered. Additional stars resembling the solar UBV colors in a broad sense,
plus stars present in the lists of Hardorp, were also selected. All objects
were ranked by a color-similarity index with respect to the Sun, defined by
uvby and BV photometry. Moderately high-resolution, high-S/N spectra were used
for a subsample of equatorial-southern stars to derive Teff, log g, and [Fe/H]
with average internal errors better than 50 K, 0.20 dex, and 0.08 dex,
respectively. Ages and masses were estimated from theoretical HR diagrams. The
color-similarity index proved very successful. We identify and rank new
excellent solar analogs, which are fit to represent the Sun in the night sky.
Some of them are faint enough to be of interest for moderately large
telescopes. We also identify two stars with near-UV spectra indistinguishable
from the Sun's. We present five new "probable" solar twin stars, besides five
new "possible" twins. Masses and ages for the best solar twin candidates lie
very close to the solar values, but chromospheric activity levels range
somewhat. We propose that the solar twins be emphasized in the ongoing searches
for extra-solar planets and SETI searches.


title: A Top-Down Approach to Managing Variability in Robotics Algorithms

abstract:
  One of the defining features of the field of robotics is its breadth and
heterogeneity. Unfortunately, despite the availability of several robotics
middleware services, robotics software still fails to smoothly handle at least
two kinds of variability: algorithmic variability and lower-level variability.
The consequence is that implementations of algorithms are hard to understand
and impacted by changes to lower-level details such as the choice or
configuration of sensors or actuators. Moreover, when several algorithms or
algorithmic variants are available it is difficult to compare and combine them.
  In order to alleviate these problems we propose a top-down approach to
express and implement robotics algorithms and families of algorithms so that
they are both less dependent on lower-level details and easier to understand
and combine. This approach goes top-down from the algorithms and shields them
from lower-level details by introducing very high level abstractions atop the
intermediate abstractions of robotics middleware. This approach is illustrated
on 7 variants of the Bug family that were implemented using both laser and
infra-red sensors.


title: A Novel Method for Automatic Segmentation of Brain Tumors in MRI Images

abstract:
  The brain tumor segmentation on MRI images is a very difficult and important
task which is used in surgical and medical planning and assessments. If experts
do the segmentation manually with their own medical knowledge, it will be
time-consuming. Therefore, researchers propose methods and systems which can do
the segmentation automatically and without any interference. In this article,
an unsupervised automatic method for brain tumor segmentation on MRI images is
presented. In this method, at first in the pre-processing level, the extra
parts which are outside the skull and don't have any helpful information are
removed and then anisotropic diffusion filter with 8-connected neighborhood is
applied to the MRI images to remove noise. By applying the fast bounding
box(FBB) algorithm, the tumor area is displayed on the MRI image with a
bounding box and the central part is selected as sample points for training of
a One Class SVM classifier. A database is also provided by the Zanjan MRI
Center. The MRI images are related to 10 patients who have brain tumor. 100
T2-weighted MRI images are used in this study. Experimental results show the
high precision and dependability of the proposed algorithm. The results are
also highly helpful for specialists and radiologists to easily estimate the
size and position of a tumor.


title:
$K^{-}p$ and $\pi^{-}p$ charge-exchange processes and $\eta - \eta'$
  mixing

abstract:
  The processes of charge-exchanges of $\pi^{-}$ and $K^{-}$ on protons at high
energies and zero transfers are described on the basis of the parton model. It
is shown that at the mentioned kinematic conditions the scattering occurs on
the valence quarks only, while scattering on sea quarks leads to disruption of
final state. Thereby a substantiation is given of the valence approximation for
the specified reaction. On the basis of GAMS-4$\pi$ data it is shown that the
description of $\eta - \eta'$ mixing does not require an introduction of
additional states that do not fit into the scheme of basis states $|\eta_N >$
and $|\eta_S >$. The resulting value of the mixing angle is $\phi_p=(36.1\pm
0.9)^0$.


title:
Higgs as a Probe of Supersymmetric Grand Unification with the Hosotani
  Mechanism

abstract:
  The supersymmetric grand unified theory where the SU(5) gauge symmetry is
broken by the Hosotani mechanism predicts the existence of adjoint chiral
superfields whose masses are at the supersymmetry breaking scale. The Higgs
sector is extended with the SU(2)_L triplet with hypercharge zero and neutral
singlet chiral multiplets from that in the minimal supersymmetric standard
model. Since the triplet and singlet chiral multiplets originate from a
higher-dimensional vector multiplet, this model is highly predictive.
Properties of the particles in the Higgs sector are characteristic and can be
different from those in the Standard Model and other models. We evaluate
deviations in coupling constants of the standard model-like Higgs boson and the
mass spectrum of the additional Higgs bosons. We find that our model is
discriminative from the others by precision measurements of these coupling
constants and masses of the additional Higgs bosons. This model can be a good
example of grand unification that is testable at future collider experiments
such as the luminosity up-graded Large Hadron Collider and future
electron-positron colliders.


title: Cd3As2 is Centrosymmetric

abstract:
  This is a revised version of a manuscript that was originally posted here in
February of 2014. It has been accepted at the journal Inorganic Chemistry after
reviews that included those of two crystallographers who made sure all the t's
were crossed and the i's were dotted. The old work (from 1968) that said that
Cd3As2 was noncentrosymmetric was mistaken, with the authors of that study
making a type of error that in the 1980s became infamous in crystallography. As
a result of the increased scrutiny of the issue of centrosymmetricity of the
1980's, there are now much better analysis tools to resolve the issue fully,
and its important to understand that not just our crystals are centrosymmetric,
even the old guy's crystals were centrosymmetric (and by implication everyone's
are). There is no shame in having made that error back in the day and those
authors would not find the current centrosymmetric result controversial; their
paper is excellent in all other aspects. This manuscript describes how the
structure is determined, explains the structure schematically, calculates the
electronic structure based on the correct centrosymmetric crystal structure,
and gives the structural details that should be used for future analysis and
modeling.


title: Delaunay variables approach to the elimination of the perigee

abstract:
  Analytical integration in Artificial Satellite Theory may benefit from
different canonical simplification techniques, like the elimination of the
parallax, the relegation of the nodes, or the elimination of the perigee. These
techniques were originally devised in polar-nodal variables, an approach that
requires expressing the geopotential as a Pfaffian function in certain
invariants of the Kepler problem. However, it has been recently shown that such
sophisticated mathematics are not needed if implementing both the relegation of
the nodes and the parallax elimination directly in Delaunay variables.
Proceeding analogously, it is shown here how the elimination of the perigee can
be carried out also in Delaunay variables. In this way the construction of the
simplification algorithm becomes elementary, on one hand, and the computation
of the transformation series is achieved with considerable savings, on the
other, reducing the total number of terms of the elimination of the perigee to
about one third of the number of terms required in the classical approach.


title: Parton-hadron dynamics in heavy-ion collisions

abstract:
  The dynamics of partons and hadrons in relativistic nucleus-nucleus
collisions is analyzed within the novel Parton-Hadron-String Dynamics (PHSD)
transport approach, which is based on a dynamical quasiparticle model for the
partonic phase (DQPM) including a dynamical hadronization scheme. The PHSD
approach is applied to nucleus-nucleus collisions from low SPS to LHC energies.
The traces of partonic interactions are found in particular in the elliptic
flow of hadrons and in their transverse mass spectra. We investigate also the
equilibrium properties of strongly-interacting infinite parton-hadron matter
characterized by transport coefficients such as shear and bulk viscosities and
the electric conductivity in comparison to lattice QCD results.


title:
High Fidelity Qubit Readout with the Superconducting Low-Inductance
  Undulatory Galvanometer Microwave Amplifier

abstract:
  We describe the high fidelity dispersive measurement of a superconducting
qubit using a microwave amplifier based on the Superconducting Low-inductance
Undulatory Galvanometer (SLUG). The SLUG preamplifier achieves gain of 19 dB
and yields a signal-to-noise ratio improvement of 9 dB over a state-of-the-art
HEMT amplifier. We demonstrate a separation fidelity of 99% at 700 ns compared
to 59% with the HEMT alone. The SLUG displays a large dynamic range, with an
input saturation power corresponding to 700 photons in the readout cavity.


title:
On the Learning Behavior of Adaptive Networks - Part II: Performance
  Analysis

abstract:
  Part I of this work examined the mean-square stability and convergence of the
learning process of distributed strategies over graphs. The results identified
conditions on the network topology, utilities, and data in order to ensure
stability; the results also identified three distinct stages in the learning
behavior of multi-agent networks related to transient phases I and II and the
steady-state phase. This Part II examines the steady-state phase of distributed
learning by networked agents. Apart from characterizing the performance of the
individual agents, it is shown that the network induces a useful equalization
effect across all agents. In this way, the performance of noisier agents is
enhanced to the same level as the performance of agents with less noisy data.
It is further shown that in the small step-size regime, each agent in the
network is able to achieve the same performance level as that of a centralized
strategy corresponding to a fully connected network. The results in this part
reveal explicitly which aspects of the network topology and operation influence
performance and provide important insights into the design of effective
mechanisms for the processing and diffusion of information over networks.


title:
On the Learning Behavior of Adaptive Networks - Part I: Transient
  Analysis

abstract:
  This work carries out a detailed transient analysis of the learning behavior
of multi-agent networks, and reveals interesting results about the learning
abilities of distributed strategies. Among other results, the analysis reveals
how combination policies influence the learning process of networked agents,
and how these policies can steer the convergence point towards any of many
possible Pareto optimal solutions. The results also establish that the learning
process of an adaptive network undergoes three (rather than two) well-defined
stages of evolution with distinctive convergence rates during the first two
stages, while attaining a finite mean-square-error (MSE) level in the last
stage. The analysis reveals what aspects of the network topology influence
performance directly and suggests design procedures that can optimize
performance by adjusting the relevant topology parameters. Interestingly, it is
further shown that, in the adaptation regime, each agent in a sparsely
connected network is able to achieve the same performance level as that of a
centralized stochastic-gradient strategy even for left-stochastic combination
strategies. These results lead to a deeper understanding and useful insights on
the convergence behavior of coupled distributed learners. The results also lead
to effective design mechanisms to help diffuse information more thoroughly over
networks.


title:
Measurement of the t t-bar production cross section in the dilepton
  channel in pp collisions at sqrt(s) = 8 TeV

abstract:
  The top-antitop quark (t t-bar) production cross section is measured in
proton-proton collisions at sqrt(s) = 8 TeV with the CMS experiment at the LHC,
using a data sample corresponding to an integrated luminosity of 5.3 inverse
femtobarns. The measurement is performed by analysing events with a pair of
electrons or muons, or one electron and one muon, and at least two jets, one of
which is identified as originating from hadronisation of a bottom quark. The
measured cross section is 239 +/- 2 (stat.) +/- 11 (syst.) +/- 6 (lum.) pb, for
an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the
standard model.


title: Nero's "solar" kingship and the architecture of Domus Aurea

abstract:
  The Domus Aurea, Nero's last "palace" constructed in the very heart of
ancient Rome, is a true masterpiece of Roman architecture. We explore here
symbolic aspects of the emperor's project, analysing the archaeoastronomy of
the best preserved part of the Domus, the Esquiline Wing. In particular, we
study the so-called Octagonal Room, the huge vaulted room which is in many
respects a predecessor of the Pantheon. The project of the room turns out to be
connected with astronomy, as will be that of the Hadrian's Pantheon 60 years
later. Indeed, the divinization and "solarisation" of the emperor placed at the
equinoxes as a point of balance in the heavens are shown to be explicitly
referred to in the rigorous orientation of the plan and in the peculiar
geometry of the design of the dome.


title: Uranium Critical Point Location Problem

abstract:
  Significant uncertainty of our present knowledge for uranium critical point
parameters is under consideration. Present paper is devoted to comparative
analysis of possible resolutions for the problem of uranium critical point
location, as well as to discussion of plausible scheme of decisive experiment,
which could resolve existing uncertainty. New calculations of gas-liquid
coexistence in uranium by modern thermodynamic code are included in the
analysis.


title: Connection between horizons and algebraic type

abstract:
  We study connections between both event and quasilocal horizons and the
algebraic type of the Weyl tensor. The relation regarding spacelike future
outer trapping horizon is analysed in four dimensions using double-null
foliation.


title: The electron-hole superfluidity in two coaxial nanotubes

abstract:
  The superfluid phase and Coulomb drag effect caused by the pairing in the
system of spatially separated electrons and holes in two coaxial cylindrical
nanotubes are predicted. It is found that the drag resistance as a function of
temperature experiences a jump at the critical temperature and can be used for
the manifestation of the superfluid transition. It is demonstrated that at
sufficiently low temperatures the order parameter and free energy density
exhibit a kink due to the electron-hole asymmetry that is controlled by the
radii of the nanotubes.


title: An embedding result

abstract:
  In unbounded subset $\Omega$ in $R^n$ we study the operator $u\rightarrow gu$
as an operator defined in the Sobolev space $W^{r,p}(\Omega)$ and which takes
values in $L^p(\Omega)$. The functions $g$ belong to wider spaces of $L^p$
connected with the Morrey type spaces. The main result is an embedding theorem
from which we can deduce a Fefferman type inequality.


title: A spin glass perspective on ferroic glasses

abstract:
  A range of ferroic glasses, magnetic, polar, relaxor and strain glasses, are
considered together from the perspective of spin glasses. Simple mathematical
modelling is shown to provide a possible conceptual unification to back
similarities of experimental observations, without considering all possible
complexities and alternatives.


title:
Combinatorial constructions for optimal two-dimensional optical
  orthogonal codes with $\lambda$ = 2

abstract:
  In this paper, we are concerned about optimal two-dimensional optical
orthogonal codes with $\lambda$ = 2. Some combinatorial constructions are
presented and many infinite families of optimal two-dimensional optical
orthogonal codes with weight 4 and $\lambda$ = 2 are obtained. Especially, we
shall see that in many cases an optimal two-dimensional optical orthogonal code
can not achieve the Johnson bound.


title: Origin of Structure: Primordial Bispectrum without non-Gaussianities

abstract:
  The primordial bispectrum has been considered in the past decade as a
powerful probe of the physical processes taking place in the early Universe.
Within the inflationary paradigm, the properties of the bispectrum are one of
the keys that serves to discriminate among competing scenarios concerning the
details of the origin of cosmological perturbations. However, all of the
scenarios, based on the conventional approach to the so-called
"quantum-to-classical transition" during inflation, lack the ability to point
out the precise physical mechanism responsible for generating the inhomogeneity
and anisotropy of our Universe starting from and exactly homogeneous and
isotropic vacuum state associated with the early inflationary regime. In past
works, we have shown that the proposals involving a spontaneous dynamical
reduction of the quantum state provide plausible explanations for the birth of
said primordial inhomogeneities and anisotropies. In the present letter, we
show that, when considering single-field slow-roll inflation within the context
of such proposals, the expected characteristics of the bispectrum turn out to
be quite different from those found in the traditional approach. In particular,
the statistical features corresponding to the primordial perturbations, which
are normally associated with the bispectrum, are treated here in a novel way
leading to rather different conclusions.